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what is an integrated circuit, what does it do, and how does it do it?
An integrated circuit is another word for s silicon chip where many components (transistors, resistors) are *integrated* on the same chip. Prior to the invention of the integrated circuit, all the individual resistors, transistors, diodes, and capacitors had to be wired into and soldered onto a breadboard. The advantage is it uses less electricity and less space and generates less waste heat. It accomplishes what it does by layering silicon that has been alloyed with various substances to make conductive, semi conductive, and non conductive layers - as well as metal layers to carry electricity and perform other effects. Depending on which layers are exposed to the metal tracery, various effects happen, which create transistors, resistors, etcetera.
[ "(i) 'integrated circuit' means a product, in its final form or an intermediate form, in which the elements, at least one of which is an active element, and some or all of the inter-connections are integrally formed in and/or on a piece of material and which is intended to perform an electronic function,\n", "An \"integrated circuit\" is defined as: A circuit in which all or some of the circuit elements are inseparably associated and electrically interconnected so that it is considered to be indivisible for the purposes of construction and commerce. Circuits meeting this definition can be constructed using many different technologies, including thin-film transistors, thick-film technologies, or hybrid integrated circuits. However, in general usage \"integrated circuit\" has come to refer to the single-piece circuit construction originally known as a \"monolithic integrated circuit\".\n", "An integrated circuit is a miniaturized electronic circuit that has been manufactured in the surface of a thin substrate of semiconductor material. Integrated circuits are used in almost all electronic equipment in use today and have revolutionized the world of electronics. The integration of large numbers of tiny transistors into a small chip was an enormous improvement over the manual assembly of circuits using discrete electronic components. On September 12, 1958, Jack Kilby developed a piece of germanium with an oscilloscope attached. While pressing a switch, the oscilloscope showed a continuous sine wave, proving that his integrated circuit worked. A patent for a \"Solid Circuit made of Germanium\", the first integrated circuit, was filed by its inventor, Jack Kilby on February 6, 1959.\n", "\"Integrated circuit\" as the term is currently used refers to a monolithic IC which differs notably from a HIC in that a HIC is fabricated by inter-connecting a number of components on a substrate whereas an IC's (monolithic) components are fabricated in a series of steps entirely on a single wafer which is then diced into chips. Some hybrid circuits may contain monolithic ICs, particularly Multi-chip module (MCM) hybrid circuits.\n", "In integrated circuit design, a via is a small opening in an insulating oxide layer that allows a conductive connection between different layers. A via on an integrated circuit is often called a through-chip via or through-silicon via (TSV). A via connecting the lowest layer of metal to diffusion or poly is typically called a \"contact\".\n", "Integrated circuits can be created to perform arbitrary operations on analog and digital signals. Most often in computing, signals are digital and can be interpreted as binary number data. Computer hardware and software operate on information in binary representation to perform computing; this is accomplished by calculating boolean functions on the bits of input and outputting the result to some output device downstream for storage or further processing.\n", "\"The integrated circuit, as we conceived and developed it at Fairchild Semiconductor in 1959, accomplishes the separation and interconnection of transistors and other circuit elements electrically rather than physically. The separation is accomplished by introducing pn diodes, or rectifiers, which allow current to flow in only one direction. The technique was patented by Kurt Lehovec at the Sprague Electric Company\".\n" ]
why do storage devices have capacities that are multiples of 8?
storage is a collection of 1's and 0's (bits) and 8 bits form a byte. all the information about your files, programs and anything else is stored in this binary form. lets just call this the data. however just storing the data isn't enough. you have to be able to manage all this data, and how to find it all. that way when you open a file, the computer knows where to go to find all the data that comes together to form the file. this is done by giving each location on the storage device an address. and since there are SO many addresses, we actually need a way to label them all. which we do - in binary. and because of this, a storage device has a certain number of locations we are able to reference before we run out. and without getting technical about binary (with 8 bits you can address 2^8, or 256 locations), multiples of 8 means we are using every single available location to store data. so if we had a 16GB USB and wanted to make it bigger, to expand it to 20GB would be silly. since we are already making more locations available to reference, we might as well use every single location and expand it to 32GB. *thougt id add this in in case you do want to get technical: so like i said, 8 bits mean you can address 256 locations. if we add one more bit, we get 2^9 different locations available to us, or 512. this continues... 1024, 2048, 4096..... so you can see that with the addition of each bit we get a twice as many more locations to store the data. this is why you often see 512mb, 1GB, 2Gb, 4Gb, 8Gb etc... sizes for storage!
[ "The most commonly used units of data storage capacity are the bit, the capacity of a system that has only two states, and the byte (or octet), which is equivalent to eight bits. Multiples of these units can be formed from these with the SI prefixes (power-of-ten prefixes) or the newer IEC binary prefixes (power-of-two prefixes).\n", "Container capacity is often expressed in twenty-foot equivalent units (TEU, or sometimes \"teu\"). A twenty-foot equivalent unit is a measure of containerized cargo capacity equal to one standard long container. This is an approximate measure, wherein the height of the box is not considered. For example, the tall high-cube, as well as containers are equally counted as one TEU. Similarly, extra long containers are commonly designated as two TEU, no different than standard long units. Two TEU are equivalent to one forty-foot equivalent unit (FEU).\n", "BULLET::::- \"Additional core storage provides two methods of using main storage: (1) The 65K mode—the computer program is enabled to address both of the main storage units, and (2) the 32K mode—the computer program is able to address only one storage unit, so that main storage capacity available to that program is effectively 32,768 words.\"\n", "BULLET::::- \"To facilitate understanding of the invention, the main storage area has been illustrated as being of 8K capacity; however, it is to be understood that the main storage area may be of larger capacity (e.g., 16K, 32K or 64K) by storing address selection control data in bit positions '2', '1' and '0' of M register 197, respectively.\"\n", "In most cases, memory devices store one bit in any given location, so they are typically compared in terms of \"cell size\", a cell storing one bit. Cell size itself is given in units of F², where \"F\" is the feature size design rule, representing usually the metal line width. Flash and racetrack both store multiple bits per cell, but the comparison can still be made. For instance, hard drives appeared to be reaching theoretical limits around 650 nm²/bit, defined primarily by the capability to read and write to specific areas of the magnetic surface. DRAM has a cell size of about 6 F², SRAM is much less dense at 120 F². NAND flash memory is currently the densest form of non-volatile memory in widespread use, with a cell size of about 4.5 F², but storing three bits per cell for an effective size of 1.5 F². NOR flash memory is slightly less dense, at an effective 4.75 F², accounting for 2-bit operation on a 9.5 F² cell size. In the vertical orientation (U-shaped) racetrack, nearly 10-20 bits are stored per cell, which itself would have a physical size of at least about 20 F². In addition, bits at different positions on the \"track\" would take different times (from ~10 to ~1000 ns, or 10 ns/bit) to be accessed by the read/write sensor, because the \"track\" would move the domains at a fixed rate of ~100 m/s past the read/write sensor. There are software utilities for modeling single and multi-bit racetrack memory designs.\n", "However, for technical reasons, the capacities of computer memories and some storage units are often multiples of some large power of two, such as 2 = bytes. To avoid such unwieldy numbers, people have often repurposed the SI prefixes to mean the nearest power of two, e.g., using the prefix \"kilo\" for 2 = 1024, \"mega\" for 2 = , and \"giga\" for 2 = , and so on. For example, a random access memory chip with a capacity of 2 bytes would be referred to as a 256-megabyte chip. The table below illustrates these differences.\n", "In addition to storage for, for example, single-family houses with a few hundred to over one thousand litres, they can also be found in larger and significantly larger forms, for example, as long-term thermal storage tanks with a few thousand litres of storage volume.\n" ]
how can a butcher "age" beef for a large period of time (21 days etc.) yet if you were to take the same cut of meat not aged and leave it in the fridge for a time after its expiry it would turn rancid and have to be thrown out?
It has a lot to do with conditions and surface area. A butcher hangs meat in all one piece in a cold room, such as a full "side" of a cow, and that side of beef isn't touching anything besides the hook it hangs from, and generally is not handled while it hangs. No flies are allowed in the area thanks to multiple plastic sheet door protectors, bug lights and other means. So its exposure to germs is very much minimal, as is the surface area of meat that contacts the air. And the whole region's humidity, temperature, and other variables is really tightly controlled. When you take a steak or roast home, it's been de-packaged from the slaughterhouse, carved up, cut, and repackaged. All of this handling exposes it to germs and surfaces. Add to it all of your handling, the germs drifting around more freely in your house, and the already-advanced age of the fresh meat, and it'll go rancid a lot quicker.
[ "Dry-aged beef is beef that has been hung or placed on a rack to dry for several weeks. After the animal is slaughtered and cleaned, it is hung as a full or half carcass. Primal (large distinct sections) or sub primal cuts, such as strip loins, rib eyes, and sirloin, are placed in a refrigerator unit, also known as a \"hot box\". This process involves considerable expense, as the beef must be stored near freezing temperatures. Subprimal cuts can be dry aged on racks either in specially climate-controlled coolers or within a moisture-permeable drybag. Moreover, only the higher grades of meat can be dry aged, as the process requires meat with a large, evenly distributed fat content. Because of this, dry-aged beef is seldom available outside of steak restaurants and upscale butcher shops or groceries. The key effect of dry aging is the concentration and saturation of the natural flavour, as well as the tenderization of the meat texture.\n", "Dry-aged beef is typically not sold by most supermarkets in the U.S. today, because it takes time and there is a significant loss of weight during the aging process. Dry-aging can take from 15 to 28 days, and typically up to a third or more of the weight is lost as moisture. This type of beef is served in higher-priced steakhouses and by select restaurants. \n", "Meat has been hung and dry aged throughout history after butchers discovered that this method makes beef more tender and flavorful than meat eaten immediately after slaughter and butchering. In the 1960s, a combination of meat hanging’s expense and the new process of wet-aging caused meat hanging to almost stop entirely. Meat hanging experienced a surge of popularity in the 1980s though, and dry aged beef continues to be sold in high-end restaurants around the world.\n", "The process takes, at a minimum, eleven days. At this point, the meat will noticeably taste better. However, the longer the meat is hung, the better the flavor will be. This length of time also results in a greater chance that the meat will spoil. Therefore, most companies will only hang meat for 20–30 days. Furthermore, dry aged meat will shrink, as much of the water has been evaporated. This loss of mass causes the meat to shrink 10-15% in size.\n", "Untreated meat decomposes rapidly if it is not preserved, at a speed that depends on several factors, including ambient humidity, temperature, and the presence of pathogens. Most meats cannot be kept at room temperature in excess of a few days without spoiling.\n", "The meat may be subject to dark cutting, a discolouration caused by stress in the animal before death which then disrupts the normal post-mortem transformation of muscle tissue to meat. This can reduce the market value of the meat.\n", "After the carcasses are chilled (unless \"hot-boned\"), primary butchery consists of selecting carcasses, sides, or quarters from which primal cuts can be produced with the minimum of wastage; separating the primal cuts from the carcass; trimming primal cuts and preparing them for secondary butchery or sale; and storing cut meats. Secondary butchery involves boning and trimming primal cuts in preparation for sale. Historically, primary and secondary butchery were performed in the same establishment, but the advent of methods of preservation and low cost transportation has largely separated them.\n" ]
What was Damascus steel?
Truthfully, we are still trying to understand the process of Damascus steel! We still don't know how the ancients did it. It's widely believed to be the process of tempering steel to make it stronger, studies have shown Damascus steel to contains nano-fibres which greatly increased it's strength and durability compared to other metals of the time. However we've only recently been able to duplicate the steel with modern techniques, as said we don't know how the it was actually done. And only in modern times have we had the technology to see and know that nano-fibres were the reason that made it stronger.
[ "The steel is named after Damascus, the capital city of Syria and one of the largest cities in the ancient Levant. It may either refer to swords made or sold in Damascus directly, or it may just refer to the aspect of the typical patterns, by comparison with Damask fabrics (which are themselves named after Damascus).\n", "Damascus steel was the forged steel comprising the blades of swords smithed in the Near East from ingots of Wootz steel imported from India and Sri Lanka. These swords are characterized by distinctive patterns of banding and mottling reminiscent of flowing water, or in a \"ladder\" or \"teardrop\" pattern. Such blades were reputed to be tough, resistant to shattering, and capable of being honed to a sharp, resilient edge.\n", "Damascus steels date back to the Crusades, and are named for the famous Syrian city where some of the first man-made metals were traded publicly. It consists of many thin layers of metal that are forged together to form a laminated solid. Designs take shape as layers are folded in then welded together by forging; while creating an intricate design and strong blade.\n", "The manufacture of what came to be called Wootz, or Damascus steel, famous for its durability and ability to hold an edge, may have been taken by the Arabs from Persia, who took it from India. It was originally created from a number of different materials including various trace elements, apparently ultimately from the writings of Zosimos of Panopolis. In 327 BC, Alexander the Great was rewarded by the defeated King Porus, not with gold or silver but with 30 pounds of steel. Recent studies have suggested that carbon nanotubes were included in its structure, which might explain some of its legendary qualities, though given the technology of that time, such qualities were produced by chance rather than by design. Natural wind was used where the soil containing iron was heated by the use of wood. The ancient Sinhalese managed to extract a ton of steel for every 2 tons of soil, a remarkable feat at the time. One such furnace was found in Samanalawewa and archaeologists were able to produce steel as the ancients did.\n", "The reputation and history of Damascus steel has given rise to many legends, such as the ability to cut through a rifle barrel or to cut a hair falling across the blade. A research team in Germany published a report in 2006 revealing nanowires and carbon nanotubes in a blade forged from Damascus steel. Although many types of modern steel outperform ancient Damascus alloys, chemical reactions in the production process made the blades extraordinary for their time, as Damascus steel was superplastic and very hard at the same time. During the smelting process to obtain Wootz steel ingots, woody biomass and leaves are known to have been used as carburizing additives along with certain specific types of iron rich in microalloying elements. These ingots would then be further forged and worked into Damascus steel blades. Research now shows that carbon nanotubes can be derived from plant fibers, suggesting how the nanotubes were formed in the steel. Some experts expect to discover such nanotubes in more relics as they are analyzed more closely.\n", "Wootz steel which is also known as Damascus steel was a unique and highly prized steel developed on the Indian subcontinent as early as the 5th century BC. Its properties were unique due to the special smelting and reworking of the steel creating networks of iron carbides described as a globular cementite in a matrix of pearlite. The use of Damascus steel in swords became extremely popular in the 16th and 17th centuries.\n", "BULLET::::- Attempts to manufacture steel that matches all the characteristics of Damascus steel, whose original manufacturing techniques have been lost for centuries, including computational fluid dynamics reconstructions by the University of Exeter of the Sri Lanka furnaces at Samanalawewa, thought to be the most likely sources for Damascus steel.\n" ]
How Did DNA Evolve?
Based on your previous comments, it sounds like your main question is something like "how did DNA evolve in the first place when we now know that many different proteins are required for its function and propagation?" If that's an accurate representation, I would point you to the [RNA world hypothesis](_URL_0_). This is the idea that RNA, not DNA, was actually the first nucleic acid polymer to arise. The RNA is more satisfying as a starting material than DNA is because we know that RNA has the capacity to perform some limited catalytic functions. For instance, RNA is a major component of ribosomal structure and function and I'm not talking about mRNAs or tRNAs. Basically, it is hypothesized that initial RNA molecules were simple replicating machines that didn't really encode anything. The RNA was simply structured to provide catalytic activity to generate a copy of other RNA molecules it came across that had similar catalytic activity. Overtime, changes in RNA structure lead to different types of catalytic activity until a relationship between nucleic acids and amino acids could be formed.
[ "DNA contains the genetic information that allows all forms of life to function, grow and reproduce. However, it is unclear how long in the 4-billion-year history of life DNA has performed this function, as it has been proposed that the earliest forms of life may have used RNA as their genetic material. RNA may have acted as the central part of early cell metabolism as it can both transmit genetic information and carry out catalysis as part of ribozymes. This ancient RNA world where nucleic acid would have been used for both catalysis and genetics may have influenced the evolution of the current genetic code based on four nucleotide bases. This would occur, since the number of different bases in such an organism is a trade-off between a small number of bases increasing replication accuracy and a large number of bases increasing the catalytic efficiency of ribozymes. However, there is no direct evidence of ancient genetic systems, as recovery of DNA from most fossils is impossible because DNA survives in the environment for less than one million years, and slowly degrades into short fragments in solution. Claims for older DNA have been made, most notably a report of the isolation of a viable bacterium from a salt crystal 250 million years old, but these claims are controversial.\n", "Katherine Pollard—Discovered short sequences of human DNA that have evolved rapidly since the human and ape lines diverged millions of years ago. Most of these fast-evolving sequences are genes that actually control other genes nearby. Many are located near genes that are active in the brain, and one appears to have a role in how the wrist and thumb develop in the fetus. These discoveries give us new insight not only into the evolutionary history of our species, but also into how genes control embryonic development—which gets us a step further to unraveling how to interrupt congenital defects.\n", "This insight is all the more remarkable because it preceded the discovery of the structure of the DNA molecule by Watson and Crick, though it followed the Avery–MacLeod–McCarty experiment which identified DNA as the molecular carrier of genetic information in living organisms. The DNA molecule is processed by separate mechanisms that carry out its instructions and copy the DNA for insertion for the newly constructed cell. The ability to achieve open-ended evolution lies in the fact that, just as in nature, errors (mutations) in the copying of the genetic tape can lead to viable variants of the automaton, which can then evolve via natural selection.\n", "When DNA is copied, the two strands of the old DNA are pulled apart by enzymes; then they pair up with new nucleotides and then close. This produces two new pieces of DNA, each containing one strand from the old DNA and one newly made strand. This process is not predictably perfect as proteins attach to a nucleotide while they are building and cause a change in the sequence of that gene. These changes in DNA sequence are called mutations. Mutations produce new alleles of genes. Sometimes these changes stop the functioning of that gene or make it serve another advantageous function, such as the melanin genes discussed above. These mutations and their effects on the traits of organisms are one of the causes of evolution.\n", "All genetic engineering processes involve the modification of DNA. Traditionally DNA was isolated from the cells of organisms. Later, genes came to be cloned from a DNA segment after the creation of a DNA library or artificially synthesised. Once isolated, additional genetic elements are added to the gene to allow it to be expressed in the host organism and to aid selection.\n", "Using statistical inference and mathematical modelling, the process of how neochromosomes initially form and evolve has been made clearer. Fragments of DNA, produced following chromothriptic shattering of chromosome 12 undergo DNA repair to form of a circular or ring chromosome. This undergoes hundreds of circular breakage-fusion-bridge cycles, causing random amplification and deletion of DNA with selection for the amplification of key oncogenes. DNA from additional chromosomes is somehow added during this process. Erosion of centromeres can lead to the formation of neocentromeres or the capture of new native centromeres from other chromosomes. The process ends when the neochromosome forms a linear chromosome following the capture of telomeric caps, which can be chromothriptically derived.\n", "The origins of biotechnology culminated with the birth of genetic engineering. There were two key events that have come to be seen as scientific breakthroughs beginning the era that would unite genetics with biotechnology. One was the 1953 discovery of the structure of DNA, by Watson and Crick, and the other was the 1973 discovery by Cohen and Boyer of a recombinant DNA technique by which a section of DNA was cut from the plasmid of an E. coli bacterium and transferred into the DNA of another. This approach could, in principle, enable bacteria to adopt the genes and produce proteins of other organisms, including humans. Popularly referred to as \"genetic engineering,\" it came to be defined as the basis of new biotechnology.\n" ]
why don't baseball pitchers wear a protective helmet if a line drive could cause permanent brain damage among other things?
Simply put, pitchers don't want to wear them. It's as simple as that. As far as I know, it's perfectly legal for players to wear helmets in the field and it has been done before (by first baseman John Olerud). Here are the reasons I've read about that account for the resistance to pitchers' helmets: 1) While the effects of getting hit can be bad, it's not a frequent occurrence. 2) Batters keep their heads steady as they swing. Pitching motions can be violent and shaky. As a result, helmets are likely to fall off or cover a pitcher's eyes. 3) Fear that wearing a heavier object on one's head can affect the pitcher's mechanics (throwing motion). 4) Concern that helmets would be hot, sweaty, and generally uncomfortable. 5) Appearance. Right now, while pitchers almost universally wear hats, violating the trend could be embarrassing or make the pitcher less able to intimidate batters. 6) A lack of knowledge/publicity surrounding devices designed specifically for pitchers. 7) Tradition. Baseball has an unusually prominent focus on remaining traditional with the way things work on the field. That's not to say that big changes don't happen, but when they do, there's often resistance.
[ "Serious injuries may result from being hit by a pitch, even when wearing a batting helmet. On August 18, 1967, Red Sox batter Tony Conigliaro was hit almost directly in the left eye by a fastball thrown by Jack Hamilton of the California Angels. His cheekbone was shattered; he nearly lost the sight of the eye, was unable to play for over a year, and never regained his earlier batting ability. Batting helmets at the time were not required to have an \"ear flap\"; it was not until 2002 that all Major League batters were required to wear helmets with side-protection. Ron Santo was the first player to wear a helmet with an improvised ear-flap, in 1966. He had it made after he was struck by a pitch from Jack Fisher that briefly knocked him unconscious and put him on the Disabled List for two weeks with a fractured cheekbone. On September 28, 1995, Kirby Puckett, of the Minnesota Twins, was struck in the cheek by a Dennis Martínez fastball, breaking his jaw and loosening two teeth. It would be his last regular-season game; during spring training the following year he developed glaucoma, which ended his career. Most recently, Mike Piazza, then of the New York Mets, was hit in the head by a pitch from Julián Tavárez of the St. Louis Cardinals on September 10, 2005. His helmet shattered, and he suffered a concussion. Other relatively minor injuries that are possible include broken fingers or hands, broken feet, broken ribs, injuries to the knee, or groin injuries.\n", "The no-flap helmet is still utilized in baseball. Catchers often wear a flapless helmet along with a facemask to protect the head when receiving pitches. Occasionally, players other than catchers will wear a batting helmet without earflaps while playing a defensive position in the field. This is usually done by a player who has a higher-than-normal risk of head injury. One example is former major-league player John Olerud, who started doing so after undergoing emergency surgery for a cerebral aneurysm while attending Washington State University. An earlier example was Richie Allen, who decided to wear a helmet in the field after at least one incident of being hit by objects thrown by fans.\n", "Currently there is a new trend of introducing a pitcher helmet to provide head protection from batters hitting line drives back to the pitcher. , MLB approved a protective pitchers cap which can be worn by any pitcher if they choose. San Diego Padres relief pitcher, Alex Torres was the first player in MLB to wear the protective cap.\n", "A batting helmet is worn by batters in the game of baseball or softball. It is meant to protect the batter's head from errant pitches thrown by the pitcher. A batter who is \"hit by pitch,\" due to an inadvertent wild pitch or a pitcher's purposeful attempt to hit him, may be seriously, even fatally, injured.\n", "In 2009, Major League Baseball decided to take action and protect players from the increasing number of concussions and head injuries. Rawlings came out with the S100 baseball helmet, named for its impact capabilities. It was able to withstand the impact of a baseball traveling at from away. The other baseball helmets used are only required to withstand a impact from away. The first Major League Player to wear this helmet during a game was Canadian-born Ryan Dempster, a pitcher with the Chicago Cubs. The new helmet did not catch on because the players said it made them look like bobbleheads. Some players, including Mets third baseman David Wright, did decide to use the helmet while batting.\n", "Changes to common practices in sports have also been discussed. An increase in use of helmets could reduce the incidence of TBI. Due to the possibility that repeatedly \"heading\" a ball practicing soccer could cause cumulative brain injury, the idea of introducing protective headgear for players has been proposed. Improved equipment design can enhance safety; softer baseballs reduce head injury risk. Rules against dangerous types of contact, such as \"spear tackling\" in American football, when one player tackles another head first, may also reduce head injury rates.\n", "A 2012 study of tornado injuries found that wearing a helmet such as those used for American football or bicycling, is an effective way to reduce injuries and deaths from head trauma. As of 2012, the CDC endorsed only general head protection, but recommended that if helmets are to be used, they be kept close by to avoid wasting time searching for them.\n" ]
How do we know the electron is a fundamental particle and not composed of something smaller?
Theories that suggest a composite electron just aren't as effective or accurate as the ones that assume it to be an elementary particle (Namely the [standard model](_URL_0_)). Furthermore, high-energy scattering experiments have revealed that it has a very tiny, nearly spherical charge distribution while also being very lightweight. That's hard to accomplish with a composite electron.
[ "The electron is a subatomic particle, symbol or , whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, \"ħ\". Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle. Like all elementary particles, electrons exhibit properties of both particles and waves: they can collide with other particles and can be diffracted like light. The wave properties of electrons are easier to observe with experiments than those of other particles like neutrons and protons because electrons have a lower mass and hence a longer de Broglie wavelength for a given energy.\n", "In chemistry electron density is the measure of the probability of an electron being present at a specific location. According to quantum mechanics, due to the uncertainty principle on an atomic scale the exact location of an electron cannot be predicted, only the probability of its being at a given position; therefore electrons in atoms and molecules act as if they are \"smeared out\" in space. For one-electron systems, the electron density at any point is proportional to the square magnitude of the wavefunction.\n", "A scientific theory which attempts to describe \"electrons\" is inherently abstract, as no one has ever observed an electron directly. Thus, the origin and content of the concept of \"electron\" is questionable. What does the word exactly signify? Ramsey and Lewis proposed that the meaning of the term \"electron\" is implicitly generated by the scientific theory that describes it, via all its assertions about electrons. Electrons are those things about which all the statements of the theory are true.\n", "However, near the end of 19th century, physicists discovered that Dalton's atoms are not, in fact, the fundamental particles of nature, but conglomerates of even smaller particles. Electron was discovered between 1879 and 1897 in works of William Crookes, Arthur Schuster, J. J. Thomson, and other physicists; its charge was carefully measured by Robert Andrews Millikan and Harvey Fletcher in their oil drop experiment of 1909. Physicists theorized that negatively charged electrons are constituent part of \"atoms\", along with some (yet unknown) positively charged substance, and it was later confirmed. Electron became the first elementary, truly fundamental particle discovered.\n", "The electron is by far the least massive of these particles at , with a negative electrical charge and a size that is too small to be measured using available techniques. It was the lightest particle with a positive rest mass measured, until the discovery of neutrino mass. Under ordinary conditions, electrons are bound to the positively charged nucleus by the attraction created from opposite electric charges. If an atom has more or fewer electrons than its atomic number, then it becomes respectively negatively or positively charged as a whole; a charged atom is called an ion. Electrons have been known since the late 19th century, mostly thanks to J.J. Thomson; see history of subatomic physics for details.\n", "In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s 2s 2p, using the notation explained below.\n", "The principle of the electron was first theorised in the period of 1838-1851 by a natural philosopher by the name of Richard Laming who speculated the existence of sub-atomic, unit charged particles; he also pictured the atom as being an 'electrosphere' of concentric shells of electrical particles surrounding a material core.\n" ]
when having diarrhea, why is it i can sit there for 20-30 minutes after going and nothing comes out. but when i get up, i immediately have to go again?
You can get the sensation of excrement entering your anus without it actually being there. You technically feel like you have to go even while sitting down but that's only because you're actually contracting your "poo muscles." When your body doesn't feel itself trying to "go" any more, it tells your brain "hey, dude there's something big coming down" and then you instinctively contract again, repeat until you actually poo.
[ "Symptoms include chronic constipation. There can be fecal incontinence and paradoxical or overflow diarrhea (encopresis) as liquid stool passes around the obstruction. Complications may include necrosis and ulcers of the rectal tissue. Abdominal pain and bloating could also be present depending on the severity of the condition. Loss of appetite can also occur.\n", "Diarrhea, also spelled diarrhoea, is the condition of having at least three loose, liquid, or watery bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss. Signs of dehydration often begin with loss of the normal stretchiness of the skin and irritable behaviour. This can progress to decreased urination, loss of skin color, a fast heart rate, and a decrease in responsiveness as it becomes more severe. Loose but non-watery stools in babies who are exclusively breastfed, however, are normal.\n", "Infrequent voiding refers to a child's voluntarily holding of urine for prolonged intervals. For example, a child may not want to use toilets at school or may not want to interrupt enjoyable activities, so he or she ignores the body's signal of a full bladder. In these cases, the bladder can overfill and leak urine. Additionally, these children often develop urinary tract infections (UTIs), leading to an irritable or overactive bladder.\n", "Symptoms include a dull ache to the left 2 inches above the anus or higher in the rectum and a feeling of constant rectal pressure or burning. The pain may last for 30 minutes or longer, and is usually described as chronic or intermittent with prolonged periods, in contrast to the brief pain of the related disorder proctalgia fugax. Pain may be worse when sitting than when standing or lying. Precipitating factors include extended sitting, defecation, stress, sexual intercourse, childbirth, and surgery. Palpation of the levator ani muscle may find tenderness.\n", "The most common symptoms are diarrhea, fever, nausea, vomiting, stomach cramps, and flatulence. It is also commonly known to cause large and painful bowel movements. The stool may contain blood, mucus, or pus. Hence, \"Shigella\" cells may cause dysentery. In rare cases, young children may have seizures. Symptoms can take as long as a week to appear, but most often begin two to four days after ingestion. Symptoms usually last for several days, but can last for weeks. \"Shigella\" is implicated as one of the pathogenic causes of reactive arthritis worldwide.\n", "The condition can become extremely painful, and usually worsens over the course of just a few days. The pain may be limited and sporadic at first, but may worsen to a constant pain which can become very severe when body position is changed (e.g., when standing up, rolling over, and so forth). Depending upon the exact location of the abscess, there can also be excruciating pain during bowel movements, though this is not always the case. This condition may occur in isolation, but is frequently indicative of another underlying disorder, such as Crohn's disease.\n", "Symptoms include tenesmus (the sensation of incomplete emptying of the rectum after defecation has occurred) and constipation. Retention of stool may result in fecal loading (retention of a mass of stool of any consistency) or fecal impaction (retention of a mass of hard stool). This mass may stretch the walls of the rectum and colon, causing megarectum and/or megacolon, respectively. Liquid stool may leak around a fecal impaction, possibly causing degrees of liquid fecal incontinence. This is usually termed encopresis or soiling in children, and fecal leakage, soiling or liquid fecal incontinence in adults.\n" ]
Do insects, particularly cockroaches, use acid in their digestive system?
It really depends on the insect. Mosquitoes, black flies and some lepidopterans actually have a basic stomach pH. However I did find a study on cockroaches that suggested that they seem to have an acidic stomach pH from around 6-2. If you're interested here is the link _URL_0_
[ "Cockroaches are generally omnivorous; the American cockroach (\"Periplaneta americana\"), for example, feeds on a great variety of foodstuffs including bread, fruit, leather, starch in book bindings, paper, glue, skin flakes, hair, dead insects and soiled clothing. Many species of cockroach harbor in their gut symbiotic protozoans and bacteria which are able to digest cellulose. In many species, these symbionts may be essential if the insect is to utilize cellulose; however, some species secrete cellulase in their saliva, and the wood-eating cockroach, \"Panesthia cribrata\", is able to survive indefinitely on a diet of crystallized cellulose while being free of micro-organisms.\n", "Cockroaches are social insects; a large number of species are either gregarious or inclined to aggregate, and a slightly smaller number exhibit parental care. It used to be thought that cockroaches aggregated because they were reacting to environmental cues, but it is now believed that pheromones are involved in these behaviors. Some species secrete these in their feces with gut microbial symbionts being involved, while others use glands located on their mandibles. Pheromones produced by the cuticle may enable cockroaches to distinguish between different populations of cockroach by odor. The behaviors involved have been studied in only a few species, but German cockroaches leave fecal trails with an odor gradient. Other cockroaches follow such trails to discover sources of food and water, and where other cockroaches are hiding. Thus, cockroaches have emergent behavior, in which group or swarm behavior emerges from a simple set of individual interactions.\n", "Like other insects, cockroaches breathe through a system of tubes called tracheae which are attached to openings called spiracles on all body segments. When the carbon dioxide level in the insect rises high enough, valves on the spiracles open and carbon dioxide diffuses out and oxygen diffuses in. The tracheal system branches repeatedly, the finest tracheoles bringing air directly to each cell, allowing gaseous exchange to take place.\n", "Oleic acid is emitted by the decaying corpses of a number of insects, including bees and \"Pogonomyrmex\" ants, and triggers the instincts of living workers to remove the dead bodies from the hive. If a live bee or ant is dabbed with oleic acid, it is dragged off for disposal as if it were dead. The oleic acid smell also may indicate danger to living insects, prompting them to avoid others who have succumbed to disease or places where predators lurk.\n", "As in most insect species, cockroaches communicate with one another by the release of pheromones. It has also been discovered that cockroaches release hydrocarbons from their body that are transferred through interactions of the antennae. These hydrocarbons can aid in cockroach communication and can even tell whether an individual is a member of its kin or not to prevent inbreeding. Cockroaches that have been isolated in a lab setting have shown extreme behavioral effects and are less stimulated by these hydrocarbons and pheromones, possibly suggesting a group environment is required for development of these communication skills.\n", "Hydramethylnon kills insects by disrupting energy production in their cells. Hydramethylnon is a slow-acting stomach poison (delayed toxicity) that does not need to be eaten to be effective. It is toxic to cockroaches both by topical application and by ingestion. Hydramethylnon residues are much less active against cockroaches by contact than by ingestion. A slow-acting poison is desirable, so they live long enough to return to the colony to share it with other cockroaches. In this way cockroaches that have eaten Hydramethylnon infect other cockroaches that have not had direct exposure to the baits. Hydramethylnon is known to cause cancer in rats, particularly uterine and adrenal tumours and lung cancer.\n", "Cockroaches, like all insects, breathe through a system of tubes called \"tracheae\". The tracheae of insects are attached to the spiracles, excluding the head. Thus cockroaches, like all insects, are not dependent on the mouth and windpipe to breathe. The valves open when the CO level in the insect rises to a high level; then the CO diffuses out of the tracheae to the outside and fresh O diffuses in. Unlike in vertebrates that depend on blood for transporting O and CO, the tracheal system brings the air directly to cells, the tracheal tubes branching continually like a tree until their finest divisions, tracheoles, are associated with each cell, allowing gaseous oxygen to dissolve in the cytoplasm lying across the fine cuticle lining of the tracheole. CO diffuses out of the cell into the tracheole. While cockroaches do not have lungs and thus do not actively breathe in the vertebrate lung manner, in some very large species the body musculature may contract rhythmically to forcibly move air out and in the spiracles; this may be considered a form of breathing.\n" ]
why does holding hands with your so feel nice?
Because physical contact releases dopamine in your brain which is a feel good chemical. Lots of recreational drugs have a similar effects.
[ "A handshake is a globally widespread, brief greeting or parting tradition in which two people grasp one of each other's like hands, in most cases accompanied by a brief up-and-down movement of the grasped hands. Handshakes are sometimes used to signify romantic relationships.\n", "Using the right hand is generally considered proper etiquette. Customs surrounding handshakes are specific to cultures. Different cultures may be more or less likely to shake hands, or there may be different customs about how or when to shake hands.\n", "BULLET::::- People holding hands is an ordinary display of friendship though women and men, but seldom show public affection toward the opposite sex but are affectionate in private. It is also common for people of the same sexes to hold hands, and is often mistakenly viewed as homosexuality to outsiders.\n", "Although some people do not exhibit a preference for one type of hand clasping, most do. Once adopted, the method of hand clasping tends to be consistent throughout life. When an individual attempts to clasp the hands in the opposite configuration from the usual one, that person may feel a sense that something is out of the ordinary.\n", "According to Tiffany Field, the director of the Touch Research Institute, holding hands stimulates the vagus nerve, which decreases blood pressure and heart rate and puts people in a more relaxed state.\n", "In Western culture, spouses and romantic couples often hold hands as a sign of affection or to express psychological closeness. Non-romantic friends may also hold hands, although acceptance of this varies by culture and gender role. Parents or guardians may hold the hands of small children to exercise guidance or authority. In terms of romance, handholding is often used in the early stages of dating or courtship to express romantic interest in a partner. Handholding is also common in advanced stages of a romantic relationship where it may be used to signify or seek solace and reassurance.\n", "Handshakes are regular greeting rituals and commonly done on meeting, greeting, offering congratulations or after the completion of an agreement. They usually indicate the level of confidence and emotion level in people. Studies have also categorized several handshake styles, e.g. the finger squeeze, the bone crusher (shaking hands too strongly), the limp fish (shaking hands too weakly), etc. \n" ]
Why aren’t underwater windmills more of a thing?
A few reasons, 1. Maintenance. It's very costly to maintain underwater infrastructure. 2. Corrosion is a big problem in salt water environments. Meaning more maintenance is needed. 3. Biological buildup. Again in saltwater, the blades are going to end up getting fouled by barnacles and other aquatic life making them less efficient over time... also needing more maintenance. 4. Limited useful locations - Tides are predictable, but you need to be in a place like a narrow bay inlet where the water actually flows inland and Outland. Out along most places on the coast, there's not actually a lot of tidal flow, just rising water. An ideal sort of location might be under the golden gate bridge. These high flow areas tend to be murky... complicating maintenance. That useful water flow also complicates maintenance because you can't easily service in high flow times. 5. Lastly transporting that power requires infrastructure either underwater or on the shore. In many of the ideal locations, placing that infrastructure is probably politically complicated. Compared to wind turbines, the extra cost makes tidal systems less efficient over time. That's not to say there are no ideal places for it. It's just there are very few compared good wind production areas Hydroelectric is more or less the same sort of thing mechanically, but you end up harvesting the potential energy from falling water flowing downhill. Frequently hydro project serves other purposes like flood control, fresh water collection, habitat and recreation. These other factors offset some of the higher capital and maintenance costs. It's also something that can be controlled and called upon in a time of need whereas a tidal system would be more like solar where it is predictable, but not controllable. Wind is neither predictable or controllable.
[ "Several types can be made; these include windmill-only ships as well as hybrid ships which store wind power from the windmill when the ship does not need to be propelled. To reduce the energy required to propel the boat, windmill ships are often equipped with low-friction hull designs, such as multihulls, or they are hydrofoils. Boats without low-friction hulls or hydrofoils can be equipped with windmills, but often the force generated by the windmills alone is not sufficient to propel the craft. In this case, the windmills only provide supplemental force to conventional sails or other propulsion systems.\n", "BULLET::::- Wind turbines are common on cruising yachts and can be very well suited to electric boats. There are safety considerations regarding the spinning blades, especially in a strong wind. It is important that the boat is big enough that the turbine can be mounted out of the way of all passengers and crew under all circumstances, including when alongside a dock, a bank or a pier. It is also important that the boat is big enough and stable enough that the \"top hamper\" created by the turbine on its pole or mast does not compromise its stability in a strong wind or gale. Large enough wind generators could produce a completely wind-powered electric boat. No such boats are yet known although a few \"mechanical\" wind turbine powered boats exist.\n", "Because a windmill can rotate 360° into the wind, no matter what direction the ship is facing, a windmill ship can sail in any direction. In fact, because the power produced depends almost entirely on the apparent wind, they can produce the most power sailing directly upwind. Note that sailing upwind, while resulting in more power generation by the wind turbine, requires more power to be expended by the engine and thus it is still more efficient to sail down wind. To sail upwind, a conventional sailing vessel must tack across the wind.\n", "The Éolienne Bollée is unique amongst other forms of windmill because of the stator. All windmills have a rotor, whether it is the sails on a traditional windmill or the blades of a modern wind turbine. The Éolienne Bollée is the only wind-powered turbine where the wind passes through a set of fixed blades (stator) before driving the windmill itself (rotor).\n", "The technology developed by MCT works much the same as a submerged windmill, driven by the flow of water rather than air. Tidal flows are more predictable than air flows both in time and maximum velocity and it is therefore possible to bring designs closer to the theoretical maximum. The turbines have a patented feature by which they can take advantage of the reversal of flow every 6 hours and generate on both flow and ebb of the tide. The tips of the blades are well below the surface so will not be a danger to shipping or be vulnerable to storms.\n", "Some non-traditional rigs capture energy from the wind in a different fashion and are capable of feats that traditional rigs are not, such as sailing directly into the wind. One such example is the wind turbine boat, also called the windmill boat, which uses a large windmill to extract energy from the wind, and a propeller to convert this energy to forward motion of the hull. A similar design, called the autogyro boat, uses a wind turbine without the propellor, and functions in a manner similar to a normal sail. A more recent (2010) development is a cart that uses wheels linked to a propeller to \"sail\" dead downwind at speeds exceeding wind speed.\n", "Offshore wind is similar to terrestrial wind technologies, as a large windmill-like turbine located in a fresh or saltwater environment. Wind causes the blades to rotate, which is then turned into electricity and connected to the grid with cables. The advantages of offshore wind are that winds are stronger and more consistent, allowing turbines of much larger size to be erected by vessels. The disadvantages are the difficulties of placing a structure in a dynamic ocean environment.\n" ]
What did people in ancient times think of dreams?
Well, at least in ancient Egypt, eating feces in your dream meant you were going to become wealthy. B. E. Shafer, ed., Religion in Ancient Egypt: Gods, Myths, and Personal Practice (Ithaca: Cornell University Press, 1991). In Mesopotamia, dreams were usually matters of interpretation. Some advanced scribes who had enough training would go on to specialize in dream interpretation. I haven't spent much time with those texts, but (suffice it to say for an only mildly helpful answer), some thought they were a big deal and had a significant impact on the religion and politics of their time. We could also readily consider Joseph from Genesis 37-50, who had several dreams which were then interpreted as being portentous about things to come involving him and his family. Similarly, we see Daniel interpreting dreams for Nebuchadnezzar in the book of Daniel.
[ "In ancient Egypt, as far back as 2000 BC, the Egyptians wrote down their dreams on papyrus. People with vivid and significant dreams were thought blessed and were considered special. Ancient Egyptians believed that dreams were like oracles, bringing messages from the gods. They thought that the best way to receive divine revelation was through dreaming and thus they would induce (or \"incubate\") dreams. Egyptians would go to sanctuaries and sleep on special \"dream beds\" in hope of receiving advice, comfort, or healing from the gods.\n", "The ancient Sumerians in Mesopotamia have left evidence of dream interpretation dating back to at least 3100 BC. Throughout Mesopotamian history, dreams were always held to be extremely important for divination and Mesopotamian kings paid close attention to them. Gudea, the king of the Sumerian city-state of Lagash (reigned 2144–2124 BC), rebuilt the temple of Ningirsu as the result of a dream in which he was told to do so. The standard Akkadian \"Epic of Gilgamesh\" contains numerous accounts of the prophetic power of dreams. First, Gilgamesh himself has two dreams foretelling the arrival of Enkidu. Later, Enkidu dreams about the heroes' encounter with the giant Humbaba. Dreams were also sometimes seen as a means of seeing into other worlds and it was thought that the soul, or some part of it, moved out of the body of the sleeping person and actually visited the places and persons the dreamer saw in his or her sleep. In Tablet VII of the epic, Enkidu recounts to Gilgamesh a dream in which he was saw the gods Anu, Enlil, and Shamash condemn him to death. He also has a dream in which he visits the Underworld.\n", "The ancient Sumerians in Mesopotamia have left evidence of dream interpretation dating back to at least 3100 BC. Throughout Mesopotamian history, dreams were always held to be extremely important for divination and Mesopotamian kings paid close attention to them. Gudea, the king of the Sumerian city-state of Lagash (reigned 2144–2124 BC), rebuilt the temple of Ningirsu as the result of a dream in which he was told to do so. The standard Akkadian \"Epic of Gilgamesh\" contains numerous accounts of the prophetic power of dreams. First, Gilgamesh himself has two dreams foretelling the arrival of Enkidu. In one of these dreams, Gilgamesh sees an axe fall from the sky. The people gather around it in admiration and worship. Gilgamesh throws the axe in front of his mother Ninsun and then embraces it like a wife. Ninsun interprets the dream to mean that someone powerful will soon appear. Gilgamesh will struggle with him and try to overpower him, but he will not succeed. Eventually, they will become close friends and accomplish great things. She concludes, \"That you embraced him like a wife means he will never forsake you. Thus your dream is solved.\" Later in the epic, Enkidu dreams about the heroes' encounter with the giant Humbaba. Dreams were also sometimes seen as a means of seeing into other worlds and it was thought that the soul, or some part of it, moved out of the body of the sleeping person and actually visited the places and persons the dreamer saw in his or her sleep. In Tablet VII of the epic, Enkidu recounts to Gilgamesh a dream in which he was saw the gods Anu, Enlil, and Shamash condemn him to death. He also has a dream in which he visits the Underworld.\n", "The ancient Sumerians in Mesopotamia have left evidence of dream interpretation dating back to at least 3100 BC. Throughout Mesopotamian history, dreams were always held to be extremely important for divination and Mesopotamian kings paid close attention to them. Gudea, the king of the Sumerian city-state of Lagash (reigned 2144–2124 BC), rebuilt the temple of Ningirsu as the result of a dream in which he was told to do so. The standard Akkadian \"Epic of Gilgamesh\" contains numerous accounts of the prophetic power of dreams. First, Gilgamesh himself has two dreams foretelling the arrival of Enkidu. Later, Enkidu dreams about the heroes' encounter with the giant Humbaba. Dreams were also sometimes seen as a means of seeing into other worlds and it was thought that the soul, or some part of it, moved out of the body of the sleeping person and actually visited the places and persons the dreamer saw in his or her sleep. In Tablet VII of the epic, Enkidu recounts to Gilgamesh a dream in which he saw the gods Anu, Enlil, and Shamash condemn him to death. He also has a dream in which he visits the Underworld.\n", "Antiphon wrote the first known Greek book on dreams in the 5th century BC. In that century, other cultures influenced Greeks to develop the belief that souls left the sleeping body. Hippocrates (469–399 BC) had a simple dream theory: during the day, the soul receives images; during the night, it produces images. Greek philosopher Aristotle (384–322 BC) believed dreams caused physiological activity. He thought dreams could analyze illness and predict diseases. Marcus Tullius Cicero, for his part, believed that all dreams are produced by thoughts and conversations a dreamer had during the preceding days. Cicero's \"Somnium Scipionis\" described a lengthy dream vision, which in turn was commented on by Macrobius in his \"Commentarii in Somnium Scipionis\".\n", "The Greeks shared their beliefs with the Egyptians on how to interpret good and bad dreams, and the idea of incubating dreams. Morpheus, the Greek god of dreams, also sent warnings and prophecies to those who slept at shrines and temples. The earliest Greek beliefs about dreams were that their gods physically visited the dreamers, where they entered through a keyhole, exiting the same way after the divine message was given.\n", "Dream divination was a common feature of Greek and Roman religion and literature of all genres. Aristotle and Plato discuss dreams in various works. The only surviving Greco-Roman dreambook, the Oneirocritica, was written by Artemidorus. Artemidorus cites a large number of previous authors, all of whom are now lost. These include Artemidoros, Astrampsychos, Nikephoros, Germanos, and Manuel Palaiologos.\n" ]
Do some plants legitimately have medicinal properties?
Your question sort of has two sub-questions that are non-trivially distinct: 1. Do plants (used as a plant or plant extract) have medicinal properties? 2. Do plants (any component thereof) have medicinal properties? As to the first, the court is still out on the vast majority of candidates, save a few known examples (such as cinchona and willow bark for malaria and painkilling, with evidence for marijuana piling up). One of the difficulties in measuring efficacy is that each plant produces a very diverse cocktail of many compounds, and are wildly variable in how much of any given compound they make between individual plants. The lack of control in compound production in plants/fungi makes it preferable to isolate active compounds for drug development - you can control dosage far more easily, and adverse effects are minimized to only what the active compound itself does. This leads into the second question, where the answer is overwhelmingly yes. Basically, if a plant is found to be truly (or even potentially) medicinal, it usually undergoes a lot of analysis (screening) until the active compound is identified, purified, and modified to either amplify efficacy or reduce adverse effects. Two major historical examples are the aforementioned willow bark (to aspirin) and cinchona (to quinine). In more recent times, two major cancer drug families, the taxanes (such as Taxol) and camptothecin-analogs (such as Camptosar) were derived from pacific yew and camptotheca tree bark respectively. It's estimated that around 60% of drugs on the market are derived from natural sources, the majority of which come from plants or fungi. So basically, yes, a few plants are medicinal and many have compounds that can potentially be medicinal, but the vast majority need pharmaceutical development to be worthwhile. A relatively unbiased review on the subject can be found [here](_URL_0_).
[ "A lot of plant species are used in today's studies and have been exhaustively studied for their potential value as source of drugs. It is possible that some plant species may be a source of drugs against high blood pressure, AIDS or heart troubles.\n", "Medicinal plants, also called medicinal herbs, have been discovered and used in traditional medicine practices since prehistoric times. Plants synthesise hundreds of chemical compounds for functions including defense against insects, fungi, diseases, and herbivorous mammals. Numerous petrochemicals with potential or established biological activity have been identified. However, since a single plant contains widely diverse phytochemicals, the effects of using a whole plant as medicine are uncertain. Further, the phytochemical content and pharmacological actions, if any, of many plants having medicinal potential remain unassessed by rigorous scientific research to define efficacy and safety.\n", "A 2012 phylogenetic study built a family tree down to genus level using 20,000 species to compare the medicinal plants of three regions, Nepal, New Zealand and the South African Cape. It discovered that the species used traditionally to treat the same types of condition belonged to the same groups of plants in all three regions, giving a \"strong phylogenetic signal\". Since many plants that yield pharmaceutical drugs belong to just these groups, and the groups were independently used in three different world regions, the results were taken to mean 1) that these plant groups do have potential for medicinal efficacy, 2) that undefined pharmacological activity is associated with use in traditional medicine, and 3) that the use of a phylogenetic groups for medicines in one region may predict their use in the other regions.\n", "As with almost every plant, medicinal value has been alleged, but no verifiable evidence of efficacy has been observed. Isolated compounds and a crude extracts from \"Astianthus\" have failed to show any antimicrobial activity. They also showed no cytotoxicity for tumor cells.\n", "There now exist many synthetic drugs with similar psychoactive properties, many derived from the aforementioned plants. Many pure active compounds with psychoactive properties have been isolated from these respective organisms and chemically synthesized, including mescaline, psilocybin, DMT, salvinorin A, ibogaine, ergine, and muscimol.\n", "All plants produce chemical compounds which give them an evolutionary advantage, such as defending against herbivores or, in the example of salicylic acid, as a hormone in plant defenses. These phytochemicals have potential for use as drugs, and the content and known pharmacological activity of these substances in medicinal plants is the scientific basis for their use in modern medicine, if scientifically confirmed. For instance, daffodils (\"Narcissus\") contain nine groups of alkaloids including galantamine, licensed for use against Alzheimer's disease. The alkaloids are bitter-tasting and toxic, and concentrated in the parts of the plant such as the stem most likely to be eaten by herbivores; they may also protect against parasites.\n", "Plants of the genus are also known for their chemistry, with a variety of secondary metabolites isolated, such as coumarins, xanthones, flavonoids, and triterpenes. Compounds from the genus have been reported to have cytotoxic, anti-HIV, antisecretory, cytoprotective, antinociceptive, molluscicidal, and antimicrobial properties. Some plants are used in folk medicine to treat conditions such as peptic ulcers, tumors, infections, pain, and inflammation.\n" ]
how does mazda's rotary engines work?
_URL_0_ Anyone who has owned an RX7 will get this.
[ "Mazda is noted for its use of rotary engines, beginning in 1967 with the Mazda Cosmo. The Cosmo was a two-seat coupe with a rotary engine producing up to . Mazda continued to produce sports cars with rotary engines (sometimes turbocharged) until the Mazda RX-8 ended production in 2012.\n", "Mazda has undertaken research on Spark Controlled Compression Ignition (SPCCI) ignition on rotary engines stating that any new rotary engines will incorporate SPCCI. SPCCi incorporates spark and compression ignition combining the advantages of gasoline and diesel engines to achieve environmental, power and fuel consumption goals.\n", "Although Mazda is well known for their Wankel \"rotary\" engines, the company has been manufacturing piston engines since the earliest years of the Toyo Kogyo company. Early on, they produced overhead camshaft, aluminum blocks, and an innovative block containing both the engine and transmission in one unit. This section summarizes piston engine developments. Note that only Mazda's V-twin, Inline-4, and V6 configurations have made it to market. The company has engineered and completed a W12 engine by 1990 for use in their proposed Amati luxury car brand. Due to financial hardships during that time, the luxury brand was abandoned as well as those two engines.\n", "Although the unique rotary engine was designed by Felix Wankel, the commercial success and worldwide applications of these engines were largely achieved by Bentele. Today compact and efficient rotary engines have commercial applications in automobiles, notably in Mazda sports and racing cars. Toyo Kogyo Kaisha, Limited (dba Mazda Motor Corporation) was one of the first to acquire a license for the Wankel in July 1960 (later ratified by the Japanese Government in July 1961) and spent many years refining the design. Rotary engines are also found in marine craft, and small custom airplanes, built by enthusiasts and small aircraft companies.\n", "Mazda refocused its efforts and made the rotary engine a choice for the sporting motorist rather than a mainstream powerplant. Starting with the lightweight RX-7 in 1978 and continuing with the modern RX-8, Mazda has continued its dedication to this unique powerplant. This switch in focus also resulted in the development of another lightweight sports car, the piston-powered Mazda MX-5 Miata (sold as the Eunos and later Mazda Roadster in Japan), inspired by the concept 'jinba ittai'. Introduced in 1989 to worldwide acclaim, the Roadster has been widely credited with reviving the concept of the small sports car after its decline in the late 1970s.\n", "Beginning in the 1960s, Mazda was inspired by the NSU Ro 80 and decided to put a major engineering effort into development of the Wankel rotary engine as a way of differentiating itself from other Japanese auto companies. The company formed a business relationship with German company NSU and began with the limited-production Cosmo Sport of 1967, and continuing to the present day with the Pro Mazda Championship, Mazda has become the sole manufacturer of Wankel-type engines for the automotive market, mainly by way of attrition (NSU and Citroën both gave up on the design during the 1970s, and prototype Corvette efforts by General Motors never made it to production.)\n", "Mazda introduced a key technology with these engines, known as the Variable Resonance Induction System (VRIS). A series of two butterfly valves coupled with electronically controlled actuators varied the volume and length of a resonant chamber within the intake manifold. The valves actuate at particular engine frequencies (i.e. rpms) to produce optimal torque/horsepower output at any given engine speed. The valve operates to create three specific first-order resonant frequencies that increase cylinder air charge. All three resonances are used from 0 to 6250 rpm (6800 for the KL-ZE). Above that threshold, the first primary resonant chamber is again used, but at this engine speed the pressure wave from the second-order resonant frequency aids in charging the cylinder. \n" ]
When the Titanic sunk due to hitting an iceberg, how iceberg filled was that part of the ocean?
The Titanic had taken a somewhat more northerly route than most liners normally had, and it was also sailing into an area (near the Grand Banks) where it had received warnings of floating bergs. At the time, no large ship had been lost to an iceberg, and it was thought that bergs did not pose a large danger to contemporary ships. (A similar passenger liner had rammed an iceberg in 1907 and was able to complete its voyage, though with damage.) So yes, the ship was in known iceberg territory, which was not uncommon, and cutting the corner slightly closer to Newfoundland than most ships did, but there would not have been a sense on the ship that the situation or those waters were unusually dangerous.
[ "The \"Titanic\"'s collision with the iceberg at 11:40 pm on April 14 woke Anton and his brother and the two ran to the ship's welldeck where they clearly saw the iceberg. They returned to their cabin and dressed, barely finishing before water began to pour into their cabin. Anton ran to his wife's cabin and woke its occupants. The entire Kink family made their way to the boat's deck, but Maria and Vinzenz were lost in the crowd.\n", "The sank in the early morning of 15 April 1912 in the North Atlantic Ocean, four days into the ship's maiden voyage from Southampton to New York City. The largest ocean liner in service at the time, \"Titanic\" had an estimated 2,224 people on board when she struck an iceberg at around 23:40 (ship's time) on Sunday, 14 April 1912. Her sinking two hours and forty minutes later at 02:20 (ship's time; 05:18 GMT) on Monday, 15 April, resulted in the deaths of more than 1,500 people, making it one of the deadliest peacetime marine disasters in history.\n", "At 11:40 p.m., on 14 April 1912 the RMS Titanic hit an iceberg. The collision opened five of her watertight compartments to the sea; the ship gradually filled with water and by 2:20 a.m., she broke apart and foundered, with well over one thousand people still aboard. Two hours after \"Titanic\" foundered, the Cunard liner RMS \"Carpathia\" arrived and took aboard an estimated 705 survivors.\n", "Shortly after 11:40 p.m. on 14 April, Smith was informed by First Officer William Murdoch that the ship had just collided with an iceberg. It was soon apparent that the ship was seriously damaged; designer Thomas Andrews reported that all of the first five of the ship's watertight compartments had been breached and that \"Titanic\" would sink in under two hours.\n", "The \"Titanic\" hit the iceberg at 11:40 pm that night and began sinking. Bride woke up shortly after and asked Phillips what was happening. Phillips said they struck something; Bride acknowledged Phillips and began to get ready to go on duty. Captain Edward Smith soon came into the wireless room alerting Bride and Phillips to be ready to send out a distress signal. Shortly after midnight he came in and told them to request help and gave them the ship's position.\n", "On her maiden voyage from Southampton, England bound for New York, \"Titanic\" collided with an iceberg just south of the tail of the Grand Banks and sank in less than three hours. The loss of life was enormous with more than 1,500 of the 2,224 passengers and crew perishing. \"Titanic\", the brand new ship of the White Star Line, was the largest passenger liner of her time displacing 45,000 tons and capable of sustained speed in excess of . The loss of \"Titanic\" gripped the world with a sobering awareness of an iceberg's potential for tragedy. The sheer dimensions of the \"Titanic\" disaster created sufficient public reaction on both sides of the Atlantic to prod reluctant governments into action, producing the first Safety of Life at Sea (SOLAS) convention in 1914. \n", "The impact with the iceberg was long thought to have produced a huge opening in \"Titanic\" hull, \"not less than in length, above the level of the keel\", as one writer later put it. At the British inquiry following the accident, Edward Wilding (chief naval architect for Harland and Wolff), calculating on the basis of the observed flooding of forward compartments forty minutes after the collision, testified that the area of the hull opened to the sea was \"somewhere about \". He also stated that \"I believe it must have been in places, not a continuous rip\", but that the different openings must have extended along an area of around 300 feet, to account for the flooding in several compartments. The findings of the inquiry state that the damage extended about 300 feet, and hence many subsequent writers followed this statement. Modern ultrasound surveys of the wreck have found that the damage consisted of six narrow openings in an area of the hull covering only about in total. According to Paul K. Matthias, who made the measurements, the damage consisted of a \"series of deformations in the starboard side that start and stop along the hull ... about above the bottom of the ship\".\n" ]
Any studies of the changing preferences for androgyny vs. polarized masculinity and femininity through history?
if the topic is overly vague: specifically I’m interested in any correlations between a timeline of these trends and the corresponding social moment, especially in terms of the political economy
[ "In addition to the expansion to include sexuality studies, under the influence of post-modernism gender studies has also turned its lens toward masculinity studies, due to the work of sociologists and theorists such as R. W. Connell, Michael Kimmel, and E. Anthony Rotundo.\n", "Since the 2000s, Peter Hennen's cultural analysis of gay masculinities has found effeminacy to be a “historically varying concept deployed primarily as a means of stabilising a given society’s concept of masculinity and controlling the conduct of its men based upon the repudiation of the feminine”.\n", "Past societal attitudes toward homosexuality have sometimes been compared to present societal attitudes toward pedophilia, since each was at one time viewed as self-evidently wrong, particularly in light of the lack of a marital relationship between the sexual partners. Lawmakers and social commentators have sometimes expressed a concern that normalizing homosexuality would also lead to normalizing pedophilia, if it were determined that pedophilia too were a sexual orientation.\n", "In contrast to earlier perspectives of the nature versus nurture debate, contemporary social scientists suggest masculinity to stem from both nature \"and\" nurture, as both biological predispositions and social factors intersect to give rise to masculine gender identities. Scholars suggest that innate differences between the sexes are compounded and/or exaggerated by the influences of social factors.\n", "The relative importance of socialization and genetics in the development of masculinity is debated. Although social conditioning is believed to play a role, psychologists and psychoanalysts such as Sigmund Freud and Carl Jung believed that aspects of \"feminine\" and \"masculine\" identity are subconsciously present in all human males.\n", "Abraham's explanation reunites the major split in sexual selection—intrasexual selection (male combat) and intersexual selection (female choice)--together under one rubric. Under female sabotage, the increase in resources becomes the critical factor, and the cause of increased male mortality is secondary. The theory also offers new, feminist approaches to leks, harems, resource guarding and mate location.\n", "Fiske and Peter Glick developed the ambivalent sexism inventory (ASI) as a way of understanding prejudice against women. The ASI posits two sub-components of gender stereotyping: hostile sexism (hostility towards nontraditional women), and benevolent sexism (idealizing and protecting traditional women). The theory posits that men and women's intimate interdependence, coupled with men's average status advantage, requires incentives for women to cooperate (benevolent sexism) and punishment for women who resist (hostile sexism). Both men and women can endorse hostile sexism and benevolent sexism, though men on average score higher than women, especially on hostile sexism. The ASI appears useful across nations. The authors have also developed a parallel scale of ambivalence toward men.\n" ]
how does netflix stream movies in high quality smoothly while youtube can't even stream a minute long video without buffering?
You pay for netflix
[ "Unlike analogue video streams in which only serial access is possible, digital video allows for random access to the media, which raises the possibility of alternative fast forwarding algorithms and visualizations. In video streaming formats, such as H.264, fast forward algorithms use the I-frames to sample the video at faster than normal speed. In streaming videos, fast-forward represents a useful search or browsing mechanism, but introduces extra network overhead when non-I-frames are transmitted in addition to the viewed I-frames and extra computational complexity in the video transcoder. Finding more network bandwidth-conserving and computationally efficient algorithms for accommodating both fast-forward and normal speed viewing is an active area of research.\n", "BULLET::::- Statistical Variable Bitrate: Ensures optimal video quality throughout the film by allocating a higher encoding budget to high detail and high motion segments of the film, while conserving the budget during slower sequences. With peaks as high as 20Mbit/s and as low as 2 Mbit/s, this process allows for the highest possible video quality streaming over a broadband Internet connection.\n", "To facilitate real-time streaming, RealVideo (and RealAudio) normally uses constant bit rate encoding, so that the same amount of data is sent over the network each second. Recently, RealNetworks has introduced a variable bit rate form called RealMedia Variable Bitrate (RMVB). This allows for better video quality, however this format is less suited for streaming because it is difficult to predict how much network capacity a certain video stream will need. Video with fast motion or rapidly changing scenes will require a higher bit rate. If the bit rate of a video stream increases significantly, it may exceed the speed at which data can be transmitted over the network, leading to an interruption in the video.\n", "When streaming over-the-top (OTT) content and video on demand, systems do not typically recognize the specific size, type, and viewing rate of the video being streamed. Video sessions, regardless of the rate of views, are each granted the same amount of bandwidth. This bottlenecking of content results in longer buffering time and poor viewing quality. Some solutions, such as upLynk and Skyfire’s Rocket Optimizer, attempt to resolve this issue by using cloud-based solutions to adapt and optimize over-the-top content.\n", "The amount of data used by video streaming services depends on the quality of the video. Thus, Android Central breaks down how much data is used (on a smartphone) with regards to different video resolutions. According to their findings, per hour video between 240p and 320p resolution uses roughly 0.3GB. Standard video, which is clocked in at a resolution of 480p, uses approximately 0.7GB per hour. \n", "In a P2PTV system, each user, while downloading a video stream, is simultaneously also uploading that stream to other users, thus contributing to the overall available bandwidth. The arriving streams are typically a few minutes time-delayed compared to the original sources. The video quality of the channels usually depends on how many users are watching; the video quality is better if there are more users.\n", "Video streaming and download services use a proprietary technical infrastructure, and are not confined to the same strict rules about frame aspect ratios as standardized distribution services (such as broadcast and optical discs). They therefore often encode content as just the active frame, without any aspect ratio adjustment bars (letterbox or pillarbox bars). Movies with a 2.39:1 aspect ratio are a natural match for 21:9 output video timings, as long as the streaming clients support such video modes, and even content with other wide aspect ratios such as 2.20:1 and 2.00:1 are inherently maximizing the use of the output frame on such systems.\n" ]
What does intergalactic space look like?
Disclaimer: I am a layperson. The sky would be different--it would be completely black to the naked eye if you were at the center of the Boötes Void. At 250 million light years in diameter, if you were in the center, the closest galaxy would be 125 million light years away. The Andromeda Galaxy is our closest non-dwarf galaxy neighbor at only 2.5 million light years away and magnitude 3.44, and it's a barely-perceptible splotch in the night sky. If it was 125 million light years away, it would be 2500 times fainter, at a magnitude of 11.9. The faintest object visible with the naked eye is magnitude 6 or below (higher magnitudes are harder to see. Also, it's a logarithmic scale.). Even if you had a telescope, you would only be able to observe galaxies. No stars (except for bright supernovae within the galaxies), no nebulae, nothing. Just distant galaxies that you'd have no hope of ever reaching. For all practical purposes, there probably wouldn't be anything larger than a [mote of dust](_URL_1_) for light years around you. I can't access the article referenced in this Wikipedia entry, but I believe it focuses on intergalactic dust *clouds*. The space between these clouds (which are probably few and *very* far between) will be filled with a [rareified hot plasma](_URL_2_) with a density of a few tens of particles per cubic meter. There are some [extragalactic stars](_URL_0_) that have been observed, but, considering that they'd necessarily be much rarer than stars in a galaxy, you'd probably be hundreds of thousands of light years from one, on average, if not further (just my guess based on nothing more than a hunch). See also [hypervelocity stars](_URL_3_). Edit: The galaxy brightness calculation above assumes the galaxy is similar to the Andromeda galaxy. The brightest galaxies are about ten times brighter, so they still would not be visible from the center of the Boötes Void.
[ "Intergalactic travel involves spaceflight between galaxies, and is considered much more technologically demanding than even interstellar travel and, by current engineering terms, is considered science fiction.\n", "Intergalactic space is the physical space between galaxies. Studies of the large scale distribution of galaxies show that the Universe has a foam-like structure, with groups and clusters of galaxies lying along filaments that occupy about a tenth of the total space. The remainder forms huge voids that are mostly empty of galaxies. Typically, a void spans a distance of (10–40) \"h\" Mpc, where \"h\" is the Hubble constant in units of .\n", "BULLET::::- Extragalactic astronomy is the branch of astronomy concerned with objects outside the Milky Way Galaxy. In other words, it is the study of all astronomical objects which are not covered by galactic astronomy. It was started by Edwin Hubble when, in 1925, he discovered the existence of Cepheid variables in the Andromeda Galaxy. This discovery proved the existence of a galaxy over one million light-years away and thus extragalactic astronomy was created.\n", "BULLET::::- Space Place - This lab focuses on astronomy and space exploration. Exhibits include a gravity well, a microgravity drop tower, exhibits on SNOLAB, and information on Canadian space exploration. The entrance to the \"Between the Stars\" object theatre is also found in Space Place. This show explores the topic of dark matter - why we know it exists, and how we are trying to detect it. Between the Stars opened in June 2010 and is designed to appeal to all age ranges with a cartoon character named String Man narrating the story of a topic that is quite complex.\n", "In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays. It fills interstellar space and blends smoothly into the surrounding intergalactic space. The energy that occupies the same volume, in the form of electromagnetic radiation, is the interstellar radiation field.\n", "Space is effectively the Canadian equivalent of The Sci Fi Channel, an English language cable television specialty channel owned and operated by CTVglobemedia. It features mainly sci-fi and fantasy movies, documentaries and television series.\n", "In the movie \"Interstellar (film)\" co-produced by \"Christopher Nolan\", the \"Endurance\" space stations and capsules create artificial gravity by rotating at a certain rotational frequency to simulate gravity. At the outer ring of the structure, the gravity experienced is similar to that on Earth.\n" ]
Collapse of the Tatars
I wrote an [answer](_URL_0_) on the history and idea of Tatars a few months ago, that might be of interest. The rough idea is that a Chingissid state called the "Golden Horde" , which in turn broke up into a number of successor states, that were conquered by Muscovy/Russia in the 16th-18th centuries. But Tatar people didn't "all die". There are still millions of ethnic Tatars! There are a number of different Tatar communities, the largest being the community in Russia that largely lives along the Volga River near the city of Kazan. Volga Tatars are the second-largest ethnic group in Russia after ethnic Russians, and have their own autonomous republic known as Tatarstan. Another significant community of Tatars lives in Crimea, currently under Russian control. Large numbers of this community emigrated to Anatolia in the 19th century, when they stopped being a majority of the population, and the whole community was deported to Central Asia by the Soviet government in 1944 (they were allowed to return in 1991). There are smaller communities of Tatars in Siberia, and in Poland-Lithuania, the latter known as "Lipka Tatars". This group is mostly assimilated into the local population (although some remain practicing Muslims), but have played a role in Polish history, notably aiding in the Polish defense of Vienna against the Ottomans in 1683. Some more famous people of Polish heritage who have Lipka Tatar ancestry include Charles Bronson and Martha Stewart.
[ "After the establishment of the Mongol Empire, the Tatars were subjugated by the Mongol Empire under Genghis Khan. Under the leadership of his grandson Batu Khan, they moved westwards, driving with them many of the Turkic peoples toward the plains of Russia in the Turkic migrations.\n", "The end of absolute Tatar dominance came in the late 15th century, heralded by the Great stand on the Ugra river in 1480. During the 16th through 18th centuries, the gradual expansion of Russia led to the absorption of the Tatar khanates into Russian territory. The Crimean Tatars attacked Russia in 1507, followed by two centuries of Russo-Crimean Wars for the Volga basin. Similarly, the Russo-Kazan Wars lasted for the best part of a century and ended with the Russian conquest of the Kazan khanate.\n", "After the early-feudal Mongolian state had broken down in the 14th century, the territory of modern Bashkortostan became divided between the Kazan and Siberia Khanates and the Nogai Horde. The tribes that lived there were headed by \"bi\" (tribal heads). After Kazan fell to Ivan the Terrible in 1554–1555, representatives of western and northwestern Bashkir tribes approached the Tsar with a request to voluntarily join Muscovy.\n", "Tatars under the leadership of Kadan experienced a major failure in March 1242 at Klis Fortress, when they were hunting for Béla IV of Hungary. The Tatars believed that the king was in the Klis Fortress, and so they began to attack from all sides, launching arrows and hurling spears. However, the natural defenses of the fortress gave protection, and the Tatars could cause only limited harm. They dismounted from their horses and began to creep up hand over hand to higher ground. But the fortress defenders hurled huge stones at them, and managed to kill a great number. This setback only made the Tatars more ferocious, and they came right up to the great walls and fought hand to hand. They looted the houses in the outskirt of the fortress and took away much plunder, but failed to take Klis altogether. Upon learning that the king was not there, they abandoned their attack, and ascending their mounts rode off in the direction of Trogir, a number of them turning off toward Split.\n", "Ultimately Kievan Rus' disintegrated, with the final blow being the Mongol invasion of 1237–40 that resulted in the destruction of Kiev and the death of about half the population of Rus'. The invading Mongol elite, together with their conquered Turkic subjects (Cumans, Kipchaks, Bulgars), became known as Tatars, forming the state of the Golden Horde, which pillaged the Russian principalities; the Mongols ruled the Cuman-Kipchak confederation and Volga Bulgaria (modern-day southern and central expanses of Russia) for over two centuries.\n", "After the fall of Kazan, territories such as Udmurtia and Bashkortostan joined Russia without a conflict. The administration of the khanate was wiped out; pro-Moscow and neutral nobles kept their lands, but others were executed. Tatars were then resettled far away from rivers, roads and Kazan. Free lands were settled by Russians and sometimes by pro-Russian Tatars. Orthodox bishops such as Germogen forcibly baptized many Tatars.\n", "The Tatars of the Crimean Khanate, the last remaining successor to the Golden Horde, continued to raid Southern Russia and burnt down parts of Moscow in 1571. Until the late 18th century, Crimean Tatars maintained a massive slave-trade with the Ottoman Empire and the Middle East, exporting about 2 million slaves from Russia and Ukraine over the period 1500–1700.\n" ]
how will autonomous cars handle not being able to see the road, ie snow
It certainly will be harder for an autonomous car to do this than normal driving. Early autonomous cars will likely have a failsafe mode, where if they can't handle the road conditions, they will pull over and return control to the driver. Also remember that these cars will have a lot of advantages, like 360^o vision, radar, IR, and future enhancements might allow them to talk to the road and to each other. What might appear as a white out to us would be no different than a sunny day to them.
[ "Also part of the field of autonomous vehicles and automated driving is the Live Roads technology. Here is currently developing such a technology that will be able to alert drivers of conditions such as weather to alert other drivers of possible hazards, or to avoid a particular area whilst driving. An example is the aggregation of data from windshield wipers and slipping tyres to notify other drivers to avoid an ice-filled area. The company is also investigating Humanised Driving where data is collected on driving habits on roads, and provisioning this data to allow automated cars to follow how drivers behave (speed, traffic lights etc.) when driving on certain roads.\n", "Self-driving cars are already exploring the difficulties of determining the intentions of pedestrians, bicyclists, and animals, and models of behavior must be programmed into driving algorithms. Human road users also have the challenge of determining the intentions of autonomous vehicles, where there is no driver with which to make eye contact or exchange hand signals. Drive.ai is testing a solution to this problem that involves LED signs mounted on the outside of the vehicle, announcing status such as \"going now, don't cross\" vs. \"waiting for you to cross\".\n", "Autonomous vehicles are equipped with different sorts of sensors and radars. As said, this allows them to connect and interoperate with computers from other autonomous vehicles and/or roadside units. This implies that autonomous vehicles leave digital traces when they connect or interoperate. The data that comes from these digital traces can be used to develop new (to be determined) products or updates to enhance autonomous vehicles' driving ability or safety.\n", "Self-driving cars combine a variety of sensors to perceive their surroundings, such as radar, lidar, sonar, GPS, odometry and inertial measurement units. Advanced control systems interpret sensory information to identify appropriate navigation paths, as well as obstacles and relevant signage.\n", "Following recent developments in autonomous cars, shared autonomous vehicles are now able to run in ordinary traffic without the need for embedded guidance markers. So far the focus has been on low speed, , with short, fixed routes for the \"last mile\" of journeys. This means issues of collision avoidance and safety are significantly less challenging than those for automated cars, which seek to match the performance of conventional vehicles. Aside from 2getthere (\"ParkShuttle\"), three companies - Ligier (\"Easymile EZ10\"), Navya (\"ARMA\" & \"Autonom Cab\") and RDM Group (\"LUTZ Pathfinder\") - are manufacturing and actively testing such vehicles. Two other companies have produced prototypes, Local Motors (\"Olli\") and the GATEway project.\n", "Although as of 2013, fully autonomous vehicles are not yet available to the public, many contemporary car models have features offering limited autonomous functionality. These include adaptive cruise control, a system that monitors distances to adjacent vehicles in the same lane, adjusting the speed with the flow of traffic; lane assist, which monitors the vehicle's position in the lane, and either warns the driver when the vehicle is leaving its lane, or, less commonly, takes corrective actions; and parking assist, which assists the driver in the task of parallel parking.\n", "Primarily uses steering input from electric power steering system, radar systems and cameras. These systems could facilitate autonomous braking in the case of drowsiness or distraction, when a driver physically does not act quickly enough. It also has the facility of autonomous driving in the prevention of an accident, when the driver reacts too slowly or not at all. \n" ]
What was religion like in the Palmyrene Empire?
Like other religions of the Near East of the time. The polytheist religion of Palmyra worshiped a number of gods and goddesses. There was the triad of Beelshamem, Aglibol, and Yarhibol- who represent storm god, moon god, and sun god. Other gods worshiped there include Baal Hammon, Manat, El, Allat, Poseidon, Shamash, Bel, Arsu and Azizu (the twin gods of morning and evening stars). Check out 'The Pantheon of Palmyra' by Javier Teixidor. There's plenty of information in there about the various gods and goddesses worshiped by the Palmyrenes. As for the empire itself under Queen Zenobia, it would include the local cults of the gods of the people conquered, as well as Jews and Christians, in addition to the gods worshiped in Palmyra itself.
[ "Palmyra was an autonomous city subordinate to Rome and part of the province of Syria Phoenice. Odaenathus descended from an aristocratic family, albeit not a royal one as the city was ruled by a council and had no tradition of hereditary monarchy. For most of its existence, the Palmyrene army was decentralized under the command of several generals, but the rise of the Sasanian Empire in 224, and its incursions which affected Palmyrene trade, combined with the weakness of the Roman Empire, probably prompted the Palmyrene council to elect a lord for the city in order for him to lead a strengthened army.\n", "By the third century AD Palmyra had become a prosperous regional center. It reached the apex of its power in the 260s, when the Palmyrene King Odaenathus defeated Persian Emperor Shapur I. The king was succeeded by regent Queen Zenobia, who rebelled against Rome and established the Palmyrene Empire. In 273, Roman emperor Aurelian destroyed the city, which was later restored by Diocletian at a reduced size. The Palmyrenes converted to Christianity during the fourth century and to Islam in the centuries following the conquest by the 7th-century Rashidun Caliphate, after which the Palmyrene and Greek languages were replaced by Arabic.\n", "Palmyra, a rich and sometimes powerful native Aramaic-speaking kingdom arose in northern Syria in the 2nd century; the Palmyrene established a trade network that made the city one of the richest in the Roman empire. Eventually, in the late 3rd century AD, the Palmyrene king Odaenathus defeated the Persian emperor Shapur I and controlled the entirety of the Roman East while his successor and widow Zenobia established the Palmyrene Empire, which briefly conquered Egypt, Syria, Palestine, much of Asia Minor, Judah and Lebanon, before being finally brought under Roman control in 273 AD.\n", "The native Syro-Phoenician religious complex was based on triads that included a supreme god, a supreme goddess, and their son; the deities taking those roles were diverse. It is possible that by 145 BC, Dionysus took the role of the son. The Levant was a multi-ethnic, multi-cultural region, but the religious complex was a unifying force. The Seleucid monarchs understood the possibility of using this complex to expand their support base amongst the locals by integrating themselves into the triads. Usage of the radiate crown, a sign of divinity, by the Seleucid kings, probably carried a message; that the king was the consort of Atargatis, Syria's supreme goddess. The radiate crown was utilised for the first time at an unknown date by Antiochus IV, who chose Hierapolis-Bambyce, the most important sanctuary of Atargatis, to ritually marry Diana, considered a manifestation of the Syrian goddess in the Levant. Alexander I's nickname, Balas, was probably used by the king himself. It is the Greek rendering of Ba'al, the Levant's supreme god. By using such an epithet, Alexander I was declaring himself the embodiment of Ba'al. Alexander I also used the radiate crown to indicate his ritual marriage to the supreme goddess. Alexander II made heavy use of the motifs of Dionysus in his coins. It is possible that, by utilising Dionysus, the son of the supreme god, Alexander II presented himself as the spiritual successor of his god-father, in addition to being his political heir.\n", "The Sogdians practiced a variety of religious faiths. However, Zoroastrianism was most likely their main religion as demonstrated by material evidence. For instance, the discovery of murals depicting votaries making offers before fire-holders and ossuaries from Samarkand, Panjakent and Er-Kurgan held the bones of the dead in accordance with Zoroastrian ritual. At Turfan, Sogdian burials shared similar features with traditional Chinese practices, yet they still retained essential Zoroastrian rituals, such as allowing the bodies to be picked clean by scavengers before burying the bones in ossuaries. They also sacrificed animals to Zoroastrian deities, including the supreme deity Ahura Mazda. Zoroastrianism remained the dominant religion among Sogdians until after the Islamic conquest, when they gradually converted to Islam, as is shown by Richard Bulliet's \"conversion curve\".\n", "From the beginning of its history to the first century AD Palmyra was a petty sheikhdom, and by the first century BC a Palmyrene identity began to develop. During the first half of the first century AD, Palmyra incorporated some of the institutions of a Greek city (polis); the concept of citizenship (demos) appears in an inscription, dated to AD 10, describing the Palmyrenes as a community. In AD 74, an inscription mentions the city's boule (senate). The tribal role in Palmyra is debated; during the first century, four treasurers representing the four tribes seems to have partially controlled the administration but their role became ceremonial by the second century and power rested in the hands of the council.\n", "Palmyrene trade reached its acme during the second century, aided by two factors; the first was a trade route built by Palmyrenes, and protected by garrisons at major locations, including a garrison in Dura-Europos manned in 117 AD. The second was the Roman conquest of the Nabataean capital Petra in 106, shifting control over southern trade routes of the Arabian Peninsula from the Nabataeans to Palmyra. In 129 Palmyra was visited by Hadrian, who named it \"Hadriane Palmyra\" and made it a free city. Hadrian promoted Hellenism throughout the empire, and Palmyra's urban expansion was modeled on that of Greece. This led to new projects, including the theatre, the colonnade and the Temple of Nabu. Roman garrisons are first attested in Palmyra in 167, when the cavalry Ala I Thracum Herculiana was moved to the city. By the end of the second century, urban development diminished after the city's building projects peaked.\n" ]
What would be the consequences for the neighbouring areas of the Atucha Power Plant in Argentina if it underwent something similar to other known nuclear disasters?
Just some context: the [plant](_URL_0_) is by a river, some 100 km upstream from Buenos Aires. What would be the risk to the city?
[ "At 7:07 a.m. (UTC-3) on 16 June 2019, Argentina's power grid \"collapsed\", according to Gustavo Lopetegui, the country's Energy Secretary. The failure occurred in the Argentine Interconnection System. In total, an estimated 48 million people lost power. The blackout affected most of Argentina (Tierra del Fuego in the country's far south was not affected) and Uruguay, along with parts of Paraguay. Although some media reported blackouts in parts of Chile and parts of southern Brazil, this claim was denied by the Chilean and Brazilian national authorities. Argentina's President Mauricio Macri called it \"unprecedented\".\n", "The 1979 TMI accident did not initiate the demise of the U.S. nuclear power industry, but it did halt its historic growth. Additionally, as a result of the earlier 1973 oil crisis and post-crisis analysis with conclusions of potential overcapacity in base load, forty planned nuclear power plants already had been canceled before the TMI accident. At the time of the TMI incident, 129 nuclear power plants had been approved, but of those, only 53 (which were not already operating) were completed. During the lengthy review process, complicated by the Chernobyl Disaster seven years later, Federal requirements to correct safety issues and design deficiencies became more stringent, local opposition became more strident, construction times were significantly lengthened and costs skyrocketed. Until 2012, no U.S. nuclear power plant had been authorized to begin construction since the year before TMI.\n", "Following the accident, questions arose about the future of the plant and its eventual fate. All work on the unfinished reactors No. 5 and No. 6 was halted three years later. However, the trouble at the Chernobyl plant did not end with the disaster in reactor No. 4. The damaged reactor was sealed off and of concrete was placed between the disaster site and the operational buildings. The work was managed by Grigoriy Mihaylovich Naginskiy, the deputy chief engineer of Installation and Construction Directorate – 90. The Ukrainian government continued to let the three remaining reactors operate because of an energy shortage in the country.\n", "While we hope that their occurrence is unlikely, there are accident sequences for U.S. plants that can lead to rupture or by-passing of the containment in U.S. reactors which would result in the off-site release of fission products comparable or worse than the releases estimated by the NRC to have taken place during the Chernobyl accident.\n", "On 16 June 2019, a large-scale power outage struck most of Argentina, all of Uruguay, and parts of Paraguay, leaving an estimated total of 48 million people without electrical supply. By the following day it was confirmed that power had been restored to most of Argentina and Uruguay, and Argentine President Mauricio Macri promised a full investigation. Preliminary reports later suggested problems with several 500-kilovolt transmission lines disrupted the flow of electricity from two dams to Argentina's power grid.\n", "This scheme was partly based on the experience gained from the 1979 Three Mile Island accident. In Fukushima, however, with three meltdowns at one site, the damage was much more extensive. It could take 30 years or more to remove the nuclear fuel, dismantle the reactors, and remove all the buildings.\n", "Major problems have resulted from the aftermath of the 2002 Argentine crisis. In Argentina, sharp economic recovery has boosted energy demand and led to power cuts. This led Argentina to unilaterally decide, in 2004, on a reduction of its gas exports to Chile, which had been subject to a 1995 treaty between the two countries. These cuts have had serious implications for Chile, leading to an expensive substitution of fuel oil for gas in the midst of a shortage of hydroelectric capacity. In addition, gas supply shortages fueled the debate for investment in expensive liquid natural gas (LNG) import facilities. Construction of the country's first liquefied natural gas re-gasification plant, at Quintero (Region V), near the capital city of Santiago, started in 2007 under the coordination of the state oil company Enap (National Petroleum Company). The partners are British Gas, with 40% of the shares, while ENAP, ENDESA and METROGAS have 20% each. The project is built under an Engineering, Procurement and Construction Contract by the Chicago Bridge & Iron company, while BG will be the long term supplier of LNG. The plant received project finance for US$1.1 billion from a consortium of international banks and is due to start operating in July 2009.\n" ]
why is texture so important in our enjoyment of a food?
Texture is a major indicator of food quality. A carrot that's mushy isn't good. We develop expectations for what foods are supposed to be like texture-wise and deviation in these expectations set off our reptile brain alarms
[ "Texture plays a crucial role in the enjoyment of eating foods. Contrasts in textures, such as something crunchy in an otherwise smooth dish, may increase the appeal of eating it. Common examples include adding granola to yogurt, adding croutons to a salad or soup, and toasting bread to enhance its crunchiness for a smooth topping, such as jam or butter.\n", "Although food is a basic and frequently experienced commodity, careful attention to the aesthetic possibilities of foodstuffs can turn eating into gastronomy. Chefs inspire our aesthetic enjoyment through the visual sense using colour and arrangement; they inspire our senses of taste and smell using spices, diversity/contrast, anticipation, seduction, and decoration/garnishes. In regard to drinking water, there are formal criteria for aesthetic value including odour, colour, total dissolved solids and clarity. There are numerical standards in the U.S. for aesthetic acceptability of these parameters.\n", "Another universal phenomenon regarding food is the appeal of contrast in taste and presentation. For example, such opposite flavors as sweetness and saltiness tend to go well together, as in kettle corn and nuts.\n", "Comfort food are usually chosen because of previous experiences of happiness linked with it. For example, chocolate is held as a popular comfort food as it is follows the pleasurable sweetness and the positive association with gifts/rewards.\n", "Edible art refers to food created to be art. It is distinguished from Edible Arrangements (which predominantly consist of fruit) because it is usually more elaborate dessert food. A common form of edible art is wedding cakes, but options for artistic confections range far beyond marital celebrations. Cakes made into art include birthday cakes, cakes for baby showers, for graduation celebrations, and many other types of event. Each piece looks unique, even if created for the same event, because each creator has their own idea in mind when creating their food art.\n", "Sensory design plays a critical role the modern food and beverage industry. The food and beverage industry attempts to maintain specific sensory experiences. In addition to smell and flavor, the color of food (e.g. ripe fruits), and texture of food (e.g. potato chips) are critical. Even the environment is important as \"Color affects the appetite, in essence, the taste of food\".\n", "Food moisture analysis involves the whole coverage of the food items in the world because foods are comprising a considerable amount of water rather than other ingredients. Foods are vital components which are consumed by the people at each and every moment for the surviving in the world. Basically there are several kinds of foods are available for the consumption as raw foods, processed foods and modified foods in the market. Moisture content of the food material is important to consider the food is suitable before the consumption, because moisture content affects the physical, chemical aspects of food which relates with the freshness and stability for the storage of the food for a long period of time and the moisture content determine the actual quality of the food before consumption and to the subsequent processing in the food sector by the food producers.\n" ]
skylanders. specific questions about what things are.
1. The series 1 and series 2 are the same thing/interchangeable/etc, as far as I know, but the series 3 portal is different due to the swappable characters in Swap Force. As for the portals connectivity to the different consoles, so far that I've seen from various comments, only the Xbox One doesn't register other systems portals. So, with the newest portal, all characters, series 1-3 work with it. 2. Yep. 3. Some of the things are new levels. Some of them are for example, a cannon that pops up and helps you out by attacking enemies. You put them right on the portal alongside the Skylander. Not all of the level unlocking items from Spyro's Adventure and Giants unlock a level in Swap Force, though.
[ "The Skylanders and Flynn track Wolfgang to Time Town, where they get help from the stereotypical Italian-speaking Mabu Da Pinchy. Fighting their way through town, they arrive too late as Wolfgang has already headed to the far future. Arriving in that time period, they discover that Wolfgang has completely taken over and constructed the \"Big Bad Woofer\", a giant speaker that amplifies his painful music 10-fold. The Skylanders make their way to the sinister speaker and shut it down, fight Wolfgang, and cage the Big Bad Man-Beast before he can freeform the ultimate concert. However, the rotten cheese was sent to the Golden Queen in the present, and she completed the weapon. Holding Skylands hostage, she demands her fellow Doom Raiders to be freed and all the gold in the world as tribute. Oh, and to make infinite number of more rules.\n", "The Skylanders and their comrades steal a rocket from the Trolls and use it to get to the Skyhighlands, where they find a crystal to locate the Golden Queen's lair. Traveling there, Cali is imprisoned in gold, and the Skylanders have to fight their way through the lair to rescue her. In an epic battle against the Queen, the Skylanders are victorious in trapping the queen and putting and end to her tyranny once and for all. But just when it looks like its over, Kaos takes the weapon for himself and absorbs the combined stinkocity and energy from the collected Traptanium. His skin turns purple as a result, also developing enhanced senses, being able to see everything. He then realizes it was not the Skylanders he had to the destroy, but the one thing that was always in his way, the player, or portal master, and sets his sights on Earth. With both worlds hanging in the balance, the Skylanders make their way through the weapon and battle Kaos, who transforms into an enhanced traptainium version of himself. In this final battle Kaos pulls out all the stops, but is finally defeated and put in a trap of his own. The weapon then over loads and explodes, freeing the trapped cities. The game ends with the residents of the academy celebrating.\n", "Players take on the role of a powerful Portal Master, who can control over 30 different Skylanders, including the purple dragon, Spyro. Each of these heroes is a protector of an amazing, mysterious world, but they have been ejected from their world by the sinister Portal Master known as Kaos, and now, they are frozen in our world as toys. Only the players of \"Skylanders Spyro's Adventure\" can get them back into their world, by embarking on a fantastical journey where they will explore mythical lands, battle menacing, outlandish creatures, collect treasures, and solve challenging puzzles as a part of the quest to save their world.\n", "Skyland (full French title: \"Skyland, Le Nouveau Monde\", or \"Skyland, The New World\"), is a CGI animated series developed in France in partnership with Canada and Luxembourg for television channels France 2, Teletoon, Nicktoons, ABC and CITV. The show is a co-production between Paris's Method Films and Toronto's 9 Story Entertainment.\n", "\"Ylem\" is \"phoenix music\", in that it represents the continual rebirth of the universe, according to the theory of the oscillating universe, which holds that the universe periodically explodes every 80,000,000,000 years. The title of the work is taken from the term \"ylem\", a word used in medieval Latin, the accusative of the borrowed Greek term \"hylē\" (ὕλη, \"matter\"), and adopted in the 1940s by the physicists George Gamow and Ralph Alpher to refer to the essential material of the universe, in the context of the \"Big Bang theory . The subject of the composition is, in short, \"the 'breath' of the universe\" . The score is dedicated to the composer's son Simon, who was five years old at the time of composition. It was composed in December 1972 for a tour with the London Sinfonietta, who gave the premiere on 9 March 1973 under the composer's direction, at the Queen Elizabeth Hall, Southbank Centre, London . The next evening, the same forces rehearsed and performed the piece on a live television broadcast from 10:50 to 11:30 pm on BBC2's \"Full House\", hosted by John Bird, with questions from the studio audience and phoned in by viewers. Three studio recordings of this version were made on 21 March 1973 in the EMI Studios, London .\n", "The Skylands is the main setting of the series, a world lying at the very center of the universe. It consists of many floating islands where each one has its own ecosystems like forests, rainforests, deserts, arctic areas, swamps, mountains, and sea-like areas.\n", "\"Skylanders: Spyro's Adventure\" received generally favorable reviews, many praising the technological use of the \"Portal of Power.\" Although some reviewers criticized the absence of online multiplayer, the toys for the Skylanders were widely praised. \"Skylanders: Spyro's Adventure\" was nominated for two Toy Industry Association awards: \"Game of the Year\" and \"Innovative Toy of the Year.\"\n" ]
how does image compression like .jpg work? a 500x500 pixel image can vary massively in filesize depending on 'detail' and file extention
Compression, in general, aims to remove redundant information. Some forms of compression, such as a zip file, do this without much special knowledge of what it is compressing, and also has to make sure it can get back the exact data before it was compressed (ie be lossless). Other types of compression are specialised, such as audio (eg mp3), video (mp4), or images (jpg). Because they are specialised, this allows them to throw away information people don't perceive and to use clever tricks that improve compression vs lossless techniques. So in the case of jpg, tricks are used to intentionally drop the quality of the image vs the original, but in ways that are only minutely perceptible. By focusing on aspects of the image we notice (edges, colour gradients etc) and degrading others (blocks of colour, textures) high compression can be achieved without losing much visual quality. Its the ratio between these important bits and the unimportant bits that determines how compressed it can become. A scene full of interest, colour and shapes? Not much can be thrownaway, so big file. A scene of a polar bear in the snow? Lots to throw away, small file.
[ "The size of raster image files is positively correlated with the number of pixels in the image and the color depth (bits per pixel). Images can be compressed in various ways, however. A compression algorithm stores either an exact representation or an approximation of the original image in a smaller number of bytes that can be expanded back to its uncompressed form with a corresponding decompression algorithm. Images with the same number of pixels and color depth can have very different compressed file size. Considering exactly the same compression, number of pixels, and color depth for two images, different graphical complexity of the original images may also result in very different file sizes after compression due to the nature of compression algorithms. With some compression formats, images that are less complex may result in smaller compressed file sizes. This characteristic sometimes results in a smaller file size for some lossless formats than lossy formats. For example, graphically simple images (i.e. images with large continuous regions like line art or animation sequences) may be losslessly compressed into a GIF or PNG format and result in a smaller file size than a lossy JPEG format.\n", "Image data of up to 65,535 bands (layers or colors) can be compressed into the ECW v2 or v3 file format at a rate of over 25 MB per second on an i7 740QM (4-cores) 1.731 GHz processor using v4.2 of the ECW/JP2 SDK. Data flow compression allows for compression of large images with small RAM requirements. The file format can achieve typical compression ratios from 1:2 to 1:100.\n", "Many image file formats use data compression to reduce file size and save storage space. Digital compression of images may take place in the camera, or can be done in the computer with the image editor. When images are stored in JPEG format, compression has already taken place. Both cameras and computer programs allow the user to set the level of compression.\n", "Some programs allow the user to vary the amount by which individual blocks are compressed. Stronger compression is applied to areas of the image that show fewer artifacts. This way it is possible to manually reduce JPEG file size with less loss of quality.\n", "JPEG 2000 decomposes the image into a multiple resolution representation in the course of its compression process. This pyramid representation can be put to use for other image presentation purposes beyond compression.\n", "If an image is compressed, each row of data (but not each bitplane) is compressed individually, including the mask data if present. The compression is a variety of RLE Compression using flags. It can be decoded as follows:\n", "Modern cameras are capable of producing images with resolutions in the range of tens of megapixels. These images need to be compressed before storage and transfer. The Haar transform can be used for image compression. The basic idea is to transfer the image into a matrix in which each element of the matrix represents a pixel in the image. For example, a 256×256 matrix is saved for a 256×256 image. JPEG image compression involves cutting the original image into 8×8 sub-images. Each sub-image is an 8×8 matrix.\n" ]
why do pc's become slow and "aggravating" to use after little time, but macs seem to stay at top performace for a long time?
IT professional here: Can you please define "slow"? This word is thrown around often when it comes to computer complaints but details matter. Is it taking a long time to boot up? Is netflix choppy? Is it slow when you open a third powerpoint deck? Those can help me answer you better. The shorter answer is RAM, that helps keep things quick. Additionally, macs I have found are less inclined to have background processes initiated and installed silently. When you hit ctrl-alt-Dlt and go to task manager, then to the "processes tab" that shows you all of those things your computer is doing that you can't see. That list may be longer and thus taking up more of the computer's resources than it is on a mac.
[ "The major problem of using the above scheme is that fast CPUs compute much faster than slow CPUs. Further, higher-end computer systems also have sophisticated pipelines and other advantageous features that facilitate computations. As a result, a spammer with a state-of-the-art system will hardly be affected by such deterrence while a typical user with a mediocre system will be adversely affected. If a computation takes a few seconds on a new PC, it may take a minute on an old PC, and several minutes on a PDA, which might be a nuisance for users of old PCs, but probably unacceptable for users of PDAs. The disparity in client CPU speed constitutes one of the prominent roadblocks to widespread adoption of any scheme based on a CPU bound function. Therefore, researchers are concerned with finding functions that most computer systems will evaluate at about the same speed, so that high-end systems might evaluate these functions somewhat faster than low-end systems (2-10 times faster, but not 10-100 faster) as CPU disparities might imply. These ratios are “egalitarian\" enough for the intended applications: the functions are effective in discouraging abuses and do not add a prohibitive delay on legitimate interactions, across a wide range of systems. \n", "Adrian Kingsley-Hughes, writing for ZDNet, believes that the slow-down over time is due to loading too much software, loading duplicate software, installing too much free/trial/beta software, using old, outdated or incorrect drivers, installing new drivers without uninstalling the old ones and may also be due to malware and spyware.\n", "Historically, Macs were not designed to be taken apart. Ever since the original closed-box Macintosh in 1984, Apple has always preferred that upgrades take place outside the case. While PC users would open up their computer to install a second hard drive, Mac users would simply plug an external hard drive into their computer; this adds slight cost and the external hard drive performs more slowly, but is easier for the average user to perform.\n", "The Ruputer and onHand PC failed to achieve widespread success, for a number of reasons. First, their screen is too small to display more than a handful of text, making it awkward to view data. Second, their joystick input requires entering text in a process similar to that of entering one's initials in an arcade game high-score list. Finally, they run through their non-rechargeable batteries more swiftly than is convenient for a device meant to be worn as a timepiece, although it was later found that the slightly larger CR2032 battery can be used which gives substantially better battery life.\n", "In April 2006 Apple released a beta version of Boot Camp, a product which allows Intel-based Macintoshes to boot directly into Windows XP or Windows Vista. The reaction from Mac game developers and software journalists to the introduction of Boot Camp has been mixed, ranging from assuming the Mac will be dead as a platform for game development to cautious optimism that Mac owners will continue to play games within Mac OS rather than by rebooting to Windows. The number of Mac ports of Windows games released in 2006 was never likely to be very great, despite the steadily increasing number of Mac users.\n", "or no disruption to the user. Some can even be scheduled to update only at night so that machines are not disturbed during business hours. These technologies reduce end-user impact and greatly reduce the time and man-power needed to ensure a secure corporate environment. Efficiency is also increased because there is much less opportunity for human error. Disk images may also be needed to transfer software to machines without a compatible physical disk drive.\n", "Goble wrote that much of the game felt sluggish, while Sulic stated that the game would play slowly on older computers. Johnson complained of slow screen redrawing, and Keith Pullin of \"PC Zone\" stated that the screen redraw could take up to 30 seconds on less-powerful computers.\n" ]
why are there different levels of sunscreen? wouldn't someone want to use the highest level that is most effective against sunburns?
Because SPF 100 sounds way more awesome than SPF 15 and people might pay more money for it. The difference between sunscreens above SPF 50 is basically negligible. SPF 15 blocks about 93% of the harmful UV features from the sun. SPF 30 about 97% and SPF 50 blocks 99%. Any higher and you're just adding fractions of a percent of additional protection. So yes, higher levels of sunscreen are "more effective", but are you more likely to get a sunburn with SPF 50 than SPF 100? Not really.
[ "Sunscreen appears to be effective in preventing melanoma. In the past, use of sunscreens with a sun protection factor (SPF) rating of 50 or higher on exposed areas were recommended; as older sunscreens more effectively blocked UVA with higher SPF. Currently, newer sunscreen ingredients (avobenzone, zinc oxide, and titanium dioxide) effectively block both UVA and UVB even at lower SPFs. Sunscreen also protects against squamous cell carcinoma, another skin cancer.\n", "These earlier studies were confirmed in 2019 which showed that sunscreen with a high UVA protection factor enabled significantly higher vitamin D synthesis than a low UVA protection factor sunscreen, likely because it allows more UVB transmission\n", "Since sunscreen absorbs ultraviolet light and prevents it from reaching the skin, it will prevent tanning. It has been reported that sunscreen with a sun protection factor (SPF) of 8 based on the UVB spectrum can decrease vitamin D synthetic capacity by 95 percent, whereas sunscreen with an SPF of 15 can reduce synthetic capacity by 98 percent.\n", "Sunscreen—Sunscreen is more transparent once applied to the skin and also has the ability to protect against UVA/UVB rays, although the sunscreen's ingredients have the ability to break down at a faster rate once exposed to sunlight, and some of the radiation is able to penetrate to the skin. In order for sunscreen to be more effective it is necessary to consistently reapply and use one with a higher sun protection factor.\n", "Sunscreen absorbs or reflects ultraviolet light and prevents much of it from reaching the skin. Sunscreen with a sun protection factor (SPF) of 8 based on the UVB spectrum decreases vitamin D synthetic capacity by 95%, and SPF 15 decreases it by 98%.\n", "Sunscreen is effective and thus recommended for preventing melanoma and squamous cell carcinoma. There is little evidence that it is effective in preventing basal cell carcinoma. Typical use of sunscreen does not usually result in vitamin D deficiency, but extensive usage may.\n", "A 5% ecamsule containing sunscreen can prevent early changes leading to photoaging in humans. A broad spectrum sunscreen with ecamsule, avobenzone and octocrylene significantly reduces the skin damage associated with UV exposure in human subjects.\n" ]
how are large, intricate corn maze designs made?
Using a board with strings attached to each end, the artist holds a string in each hand and keeps the board under foot pushing the cornstalks down with the board and using the strings to pull the board back up. The board is used to keep a uniform width of the lines in the corn, and the motion of kicking down and then pulling up the board helps them do this rapidly. TL;DR Aliens
[ "A corn maze or maize maze is a maze cut out of a corn field. The first corn maze was in Annville, Pennsylvania. Corn mazes have become popular tourist attractions in North America, and are a way for farms to generate tourist income. Many are based on artistic designs such as characters from movies. Corn mazes appear in many different designs. Some mazes are even created to tell stories or to portray a particular theme. Most have a path which goes all around the whole pattern, either to end in the middle or to come back out again, with various false trails diverging from the main path. In the United Kingdom, they are known as maize mazes, and are especially popular with farms in the east of England. These mazes are normally combined with other farm attractions of interest to families and day trippers. Some of these attractions include hay rides, a petting zoo, play areas for children, and picnic areas. Each year a few of the mazes are featured in national newspapers and TV. In the U.S., corn mazes typically are cut down circa the first week of November; in the UK typically in September after children return to school.\n", "Mazes have been built with walls and rooms, with hedges, turf, corn stalks, straw bales, books, paving stones of contrasting colors or designs, and brick, or in fields of crops such as corn or, indeed, maize. Maize mazes can be very large; they are usually only kept for one growing season, so they can be different every year, and are promoted as seasonal tourist attractions. Indoors, mirror mazes are another form of maze, in which many of the apparent pathways are imaginary routes seen through multiple reflections in mirrors. Another type of maze consists of a set of rooms linked by doors (so a passageway is just another room in this definition). Players enter at one spot, and exit at another, or the idea may be to reach a certain spot in the maze. Mazes can also be printed or drawn on paper to be followed by a pencil or fingertip. Mazes can be built with snow.\n", "It is a giant maze cut into a field of corn approximately . It is open from August to October annually and is themed around a local event or attraction. The Edmonton Corn Maze is part of \"The MAiZE\". The MAiZE is the largest corn maze company in the world and helps with the design and operation of corn mazes. \n", "An unusual use for maize is to create a \"corn maze\" (or \"maize maze\") as a tourist attraction. The idea of a maize maze was introduced by the American Maze Company who created a maze in Pennsylvania in 1993. Traditional mazes are most commonly grown using yew hedges, but these take several years to mature. The rapid growth of a field of maize allows a maze to be laid out using GPS at the start of a growing season and for the maize to grow tall enough to obstruct a visitor's line of sight by the start of the summer. In Canada and the US, these are popular in many farming communities.\n", "A cornfield maze is an attraction that uses cornstalks to form paths for people to walk through. Patrons can expect to experience turns, twists, straight paths and dead ends. The cornfield maze might be designed to resemble a popular character, public figure, event or holiday. Most cornfield mazes are open during the day and are appropriate for all ages.\n", "Hedge mazes evolved from the knot gardens of Renaissance Europe, and were first constructed during the mid-16th century. These early mazes were constructed from evergreen herbs, but, over time, dwarf box became a more popular option due to its robustness. Italian architects had been sketching conceptual garden labyrinths as early as 1460, and hundreds of mazes were constructed in Europe between the 16th and 18th centuries.\n", "Since 2000, Phillips has partnered with Hugh McPherson of MaizeQuest, a corn maze company to design corn mazes, interactive games, and walk-through mazes (such as bamboo, hedge, and fence) for locations throughout the United States, Canada, and England. \n" ]
when companies like facebook track their user's activity to sell it, who do they sell it to? and what do the buyers do with the data?
Have you ever used Hulu, and seen one of those ads that asks you to pick the one that is most relevant to you? Basically, companies like Facebook are selling user data so that marketing companies can do this without additional input and target ads to you.
[ "Through data mining, companies are able to improve their sales and profitability. With this data, companies create customer profiles that contain customer demographics and online behavior. A recent strategy has been the purchase and production of \"network analysis software\". This software is able to sort out through the influx of social networking data for any specific company. Facebook has been especially important to marketing strategists. Facebook's controversial \"Social Ads\" program gives companies access to the millions of profiles in order to tailor their ads to a Facebook user's own interests and hobbies. However, rather than sell actual user information, Facebook sells tracked \"social actions\". That is, they track the websites a user uses outside of Facebook through a program called Facebook Beacon.\n", "Companies often use the data that is shared via social networking sites and other forms of data sharing avenues, advertisers, etc. Social networking sites, for example, can sell user data to advertisers and other entities which they can then influence consumer decisions. Data mining is also used to gather this information.\n", "Large companies share their users' data constantly. In 2018, the U.S, government cracked down on Facebook selling user data to other companies after declaring that it had made the data in question inaccessible. One such case was in a scandal regarding Cambridge Analytica, in which Facebook sold user data to the company without consent from the users whose data was being accessed. The data was then used for several political agendas, such as the Brexit vote and the U.S. Presidential Election of 2016. In an interview with CBS' 60 Minutes, Trump campaign manager Brad Parscale described in detail how he used data taken from different social media websites to create ads that were both visually appealing to potential voters and targeted the issues that they felt strongest about. \n", "Businesses also rely on dataveillance to help them understand the online activity for potential clients by tracking their online activity. By tracking their online activity through cookies, as well as various other methods, businesses are able to better understand what sort of advertisements work with their existing and potential clients. While making online transactions users often give away their information freely which is later used by the company for corporate or private interests. For businesses this information can help boost sales and attract attention towards their products to help generate revenue.\n", "In 2010, the \"Wall Street Journal\" found that many of Facebook's top-rated apps were transmitting identifying information to \"dozens of advertising and Internet tracking companies\". The apps used an HTTP referer that exposed the user's identity and sometimes their friends' identities. Facebook said that \"While knowledge of user ID does not permit access to anyone’s private information on Facebook, we plan to introduce new technical systems that will dramatically limit the sharing of User ID’s\". A blog post by a member of Facebook's team further stated that \"press reports have exaggerated the implications of sharing a user ID\", though still acknowledging that some of the apps were passing the ID in a manner that violated Facebook's policies.\n", "During the product announcement, Facebook initially claimed that data obtained from Portal would not be used for targeted advertising. One week after the announcement, Facebook changed its position and stated that \"usage data such as length of calls, frequency of calls\" and \"general usage data, such as aggregate usage of apps, etc., may also feed into the information that we use to serve ads\". The company later clarified that it analyzes the metadata, not the content, of video calls made through Portal.\n", "A second clause that brought criticism from some users allowed Facebook the right to sell users' data to private companies, stating \"We may share your information with third parties, including responsible companies with which we have a relationship.\" This concern was addressed by spokesman Chris Hughes, who said, \"Simply put, we have never provided our users' information to third party companies, nor do we intend to.\" Facebook eventually removed this clause from its privacy policy.\n" ]
Can anyone recommend a good book of world maps with political borders from various periods throughout history?
I can't give you any advice on the pre-USSR map specifically, but one I can personally vouch for is [this book](_URL_1_) called *Great City Maps*. It's a full-color collection of various surviving maps of great cities dating from Roman times up until about 1900. There are a couple of maps of Moscow and a couple of maps of St. Petersburg in there. I have it and it's a pretty great coffee table book. You're not going to get a huge in-depth study of any particular city, but the maps are all big and colorful, and are full reproductions of the originals. So you'll see stuff like a map of London in 1572, and the text will point out some of the highlights on the map from then, and what still exists and what doesn't and, to some extent, what happened. It also serves as a good overview of the history of maps, as you can see how much more detailed and accurate they got over the centuries. You can see the table of contents in the link above, and a few more pages can be seen in [its Amazon preview](_URL_2_). Hopefully, that gives you enough to see if it's worth it. It should be said that the pages in the preview are from the first pages in the book, which are the oldest maps. As they move into the 1400s and later, they begin to have the detail that we're now used to. The dimensions of the book are large, so it looks better in real life than it does in the preview. By the same publisher is [*Great Maps*](_URL_4_) which seems to be basically the same thing, except the maps are mostly country-wide, or continent-wide instead of city maps. For the Russian maps, though I can't vouch for them myself, it looks like [*Restless Empire: A Historical Atlas of Russia*](_URL_0_) from Harvard University Press and [*The Penguin Historical Atlas of Russia*](_URL_3_) from Penguin Publishing are going to be two of your best bets. They both have smaller dimensions than the *Great Maps* books, but the *Restless Empire* book is 8.5" x 11"--the standard size of a sheet of paper. The Penguin book is smaller. I hope this helps. Good luck!
[ "This map covers areas which today are countries including Iraq, Afghanistan, Iran, Kuwait, Uzbekistan, Turkmenistan, Tajikistan, Armenia, and the republic of Azerbaijan. The map also contains parts of today’s Russia, Pakistan, Turkey, Ukraine, Kazakhstan and the Arabian Peninsula. In the map Gilom has also drawn mountains and connecting roads between cities.\n", "The Map Library on the other hand is a rich collection comprising three thousand geographic maps for a total of fourteen thousand sheets, inherited from the Map Service of the Ministry for Italian Africa. The collection, which covers the last decade but one of the 19th century to the first half of the 20th, is the largest and most important of its kind in Italy and takes in Eritrea, Ethiopia, Somalia and Libya in particular.\n", "Built in 1935 and based upon Rand McNally political maps published the previous year, the Mapparium shows the political world as it was at that time, including such long-disused labels as Italian East Africa and Siam, as well as more recently defunct political entities such as the Soviet Union. In 1939, 1958, and 1966 the Church considered updating the map, but rejected it on the basis of cost and the special interest it holds as a historical artifact.\n", "A History of the World in Twelve Maps is a 2012 book by British historian Jerry Brotton, on the relationship between cartography, history, and geography. The book examines the roles that twelve maps have played in influencing diplomacy, geopolitics and how people view the world.\n", "The authoritative guide \"World directory of map collections\" (2000) lists 714 map collections in 121 countries. With few exceptions, the most valuable map collections are held in either Europe or North America. There are also some map collections in South America, Africa and South Asia, but those collections are comparatively rare and of much lower value.\n", "BULLET::::- Guthrie, William. \"A New Geographical, Historical And Commercial Grammar And Present State Of The World\". Complete With 30 Fold Out Maps - All Present. J. Johnson Publishing (1808) ASIN B002N220JC\n", "The Library also holds many important maps and prints relating to the New World. These maps include one of the first printed attempts to depict America in cartographic form (the so-called Stevens-Brown map, a prototype of the 1513 Ptolemy Orbis Typus); the first printed map of Hernán Cortés’s Mexico City, built on the ruins of the Aztec capital, Tenochtitlán; the earliest known printed plan of a European settlement in what is now the United States (a plan of Fort Caroline built by Huguenot settlers in 1565 near present-day Jacksonville, Florida); and one of the earliest maps to show the French exploration of the Mississippi River, attributed to Louis Joliet.\n" ]
How did the Romans brush their teeth
The Natural History by Pliny the Elder is a very good source for this. A substance called *dentifricium* which was quite similar to our toothpaste was produced from powdered pumice [Plin. HN 36.42](_URL_1_) ("Considered medicinally, pumice is of a resolvent and desiccative nature; for which purpose it is submitted to calcination, no less than three times, on a fire of pure charcoal, it being quenched as often in white wine. It is then washed, like cadmia,5 and, after being dried, is put by for keeping, in a place as free from damp as possible. [...] dentifrices, too, are prepared from it"), or the calcinated bones of several animal species (e. g. the ashes of deers horns, wolf's heads, heads of mice, the pastern-bone of an ox). The latter are mentioned in [Plin. HN 28.49](_URL_0_) which is generally a good read on roman dentistry.
[ "The predecessor of the toothbrush is the chew stick. Chew sticks were twigs with frayed ends used to brush the teeth while the other end was used as a toothpick. The earliest chew sticks were discovered in Sumer in southern Mesopotamia in 3500 BC, an Egyptian tomb dating from 3000 BC, and mentioned in Chinese records dating from 1600 BC. The Greeks and Romans used toothpicks to clean their teeth, and toothpick-like twigs have been excavated in Qin Dynasty tombs. Chew sticks remain common in Africa, the rural Southern United States, and in the Islamic world the use of chewing stick Miswak is considered a pious action and has been prescribed to be used before every prayer five times a day. Miswaks have been used by Muslims since 7th century.\n", "As long ago as 3000 B.C., the ancient Egyptians constructed crude toothbrushes from twigs and leaves to clean their teeth. Similarly, other cultures such as the Greeks, Romans, and Indians cleaned their teeth with twigs. Some would fray one end of the twig so that it could penetrate between the teeth more effectively. The Arabs, especially after the rise of Islam, used Miswak, a kind of natural toothbrush.\n", "The modern manual tooth brush is a dental tool which consists of a head of nylon bristles attached to a long handle to help facilitate the manual action of tooth brushing. Furthermore, the handle aids in reaching as far back as teeth erupt in the oral cavity. The tooth brush is arguably a person's best tool for removing dental plaque from teeth, thus capable of preventing all plaque-related diseases if used routinely, correctly and effectively. Oral health professionals recommend the use of a tooth brush with a small head and soft bristles as they are most effective in removing plaque without damaging the gums.\n", "The tooth brush is designed to reach the ‘hard to reach places’ within the mouth. This tool is best used behind the lower front teeth, behind the back molars, crooked teeth and between spaces where teeth have been removed.\n", "The front and backs of teeth should be brushed with the toothbrush at a 45 degree angle towards the gum line, moving the brush in a back and forth rolling motion that makes contact with the gum line and tooth. To brush the backs of the front teeth the brush should be held vertically to the tooth and moved in an up and down motion. The chewing surfaces of the teeth are brushed with a forward and back motion, with the toothbrush pointing straight at the tooth.\n", "Tooth brushing is the act of scrubbing teeth with a toothbrush equipped with toothpaste. Interdental cleaning (with floss or an interdental brush) can be useful with tooth brushing, and together these two activities are the primary means of cleaning teeth, one of the main aspects of oral hygiene.\n", "Tooth powder was historically used among the Romans to clean and whiten teeth, to fix them when loose, to strengthen the gums, and to assuage toothache. They made tooth powder from a variety of substances, such as the bones, hoofs, and horns of certain animals; crabs; oyster and murex shells; and egg-shells. These ingredients were reduced to a fine powder, sometimes after having been previously burnt. Some versions contained honey, ground myrrh, nitre, salt, and hartshorn, which would be added after the initial powdering process. Pliny the Elder reported the use of pounded pumice as a dentifrice. The earliest mention of tooth care among the Romans comes from a letter by Apuleius, complaining that using tooth powder is nothing to be ashamed of, especially compared to the \"utterly repulsive things they do in Spain.\" Apuleius quotes Catullus in saying that he would be using his own urine \"to brush his teeth and his red gums.\"\n" ]
When did rhyming in poetry start? What culture implemented it, and how did it get passed on to the way we view rhyming poetry today?
I will presume you're thinking of European poetry of Dante, Cavalcanti and Petrarca in particular as rhyme is found across the world, [including pre-Columbian America](_URL_0_) and [Ancient China](_URL_1_). Until a better answer comes around I'll discuss the academic opinions known to the modernist poet Ezra Pound way back in the beginning of the century. The problem with writing a narrative is that we will have to connect dots of poetry different times and in different languages and these dots can be connected in different ways. Well, the Florentine language poets explicitly harkened back to the troubadours of the Provence (Jaufré Rudel, Bernart de Ventandorn, Daniel Arnaut...). Their culture and language came to a downfall with the Cathar Crusade in the 13th century, but, presumably, *their* example has also been followed in Germany (Minnesang) and went, through France (Trouvères), to England, with the Anglo-Norman poets Maistre Wace, Richard the Lionheart and Tumas de Britanje. For some reason, they are rarely even mentionned as *English* poets, so that you get a gaping nothingness between the Middle English of a Geoffrey Chausser and the Beowulf. Speaking of which: one of the academic opinions mentionned by Pound seeks the roots of a troubadour's rhyme in such Germanic staff rhymed poetry as Beowulf and the Ludwigslied. Here academics (mostly German ones) count the lines that rhyme and come to the conclusion that a fashion is arising to rhyme together with the middle ages. The French academics instead sought the beginning of troubadours in North Africa (which happened to be French at that time), by drawing parallels between Andalusian Arabic poetry (such as that of ibn Zaydun) and, through christian Spanish folk poetry (such as the cantigas de Santa Maria), to Southern France. Pound finds the French position more convincing than the German one but we still have no explicit credit given by any of the troubadours.
[ "The earliest surviving evidence of rhyming is the Chinese Shi Jing (ca. 10th century BC). Rhyme is also occasionally used in the Bible. Classical Greek and Latin poetry did not usually rhyme, but rhyme was used very occasionally. For instance, Catullus includes partial rhymes in the poem \"Cui dono lepidum novum libellum\". The ancient Greeks knew rhyme, and rhymes in \"The Wasps\" by Aristophanes are noted by a translator.\n", "Rhyme entered European poetry in the High Middle Ages, in part under the influence of the Arabic language in Al Andalus (modern Spain). Arabic language poets used rhyme extensively from the first development of literary Arabic in the sixth century, as in their long, rhyming qasidas.\n", "Rhyme is central to classical Arabic poetry tracing back to its 6th century pre-Islamic roots. According to some archaic sources, Irish literature introduced the rhyme to Early Medieval Europe, but that is a disputed claim. In the 7th century, the Irish had brought the art of rhyming verses to a high pitch of perfection. The leonine verse is notable for introducing rhyme into High Medieval literature in the 12th century.\n", "From the ninth century the influence of Arabic poetry made itself felt in Syriac hymnody, especially by the introduction of rhyme, this manner of marking the final stroke of a verse had been hitherto unknown, the rare examples held to have been discovered among older authors being merely voluntary or fortuitous assonances. But the Syrians made varied use of rhyme. There are poems in which all the verses have the same rhyme as in the \"Kasida\" of the Arabs. In others, and these are more numerous, the verses of each strophe have a single rhyme that is not the same for all the strophes. In others the verses of a strophe rhyme among themselves, with the exception of the last, which repeats the rhyme of the first strophe like a refrain. In acrostic poems the rhyme is sometimes supplied by the corresponding letter of the alphabet; thus the first strophe rhymes with a, the second with b, etc. There may also be a different rhyme for the first two measures and for the last. These are the most frequent combinations, but there are others. \n", "In many languages, including modern European languages and Arabic, poets use rhyme in set patterns as a structural element for specific poetic forms, such as ballads, sonnets and rhyming couplets. However, the use of structural rhyme is not universal even within the European tradition. Much modern poetry avoids traditional rhyme schemes. Classical Greek and Latin poetry did not use rhyme. Rhyme entered European poetry in the High Middle Ages, in part under the influence of the Arabic language in Al Andalus (modern Spain). Arabic language poets used rhyme extensively from the first development of literary Arabic in the sixth century, as in their long, rhyming qasidas. Some rhyming schemes have become associated with a specific language, culture or period, while other rhyming schemes have achieved use across languages, cultures or time periods. Some forms of poetry carry a consistent and well-defined rhyming scheme, such as the chant royal or the rubaiyat, while other poetic forms have variable rhyme schemes.\n", "In the 14th century French poetry was tending to move away from song and towards written text. The two main forms used in this new literary poetry were the ballade, which employed a refrain at first but evolved to include an envoi, and the \"chant royal\", which used an envoi from the beginning.\n", "The genre started with Carl Michael Bellman in the late 18th century. In the 19th century, poetic songwriting fell into decline in favour of academic student choirs, until it was revived in the 1890s by Sven Scholander. Poets increasingly continued the tradition of having their poetry put to music to give it a wider audience. In the early 1900s, a lot of poetry of the 90s poets Gustaf Fröding and Erik Axel Karlfeldt had been put to music, and the popularity of those poets largely depended on the troubadours.\n" ]
Does World War I actually deserve the title of World War?
The UK in 1914 was a world power having bases and territory directly and indirectly under its control on every continent. Germany also had land (though much smaller then the UK) on several continents. There where battles that took place outside of the trenches and the middle east. For example the [Siege of Tsingtao](_URL_1_) was in the Pacific while the [Battle of Coronel](_URL_0_) was in South America. Thus we can see Battles taking place in South America, Africa, China, Europe, and the Middle East. By any definition that is world wide combat. However it is also considered a world war because it involved thanks to Empire every continent and almost all the major power of the day. The US, Russia, Germany, France, UK, Italy, and Japan where all involved.
[ "The term \"World War I\" was coined by \"Time\" magazine on page 28b of its June 12, 1939 issue. In the same article, on page 32, the term \"World War II\" was first used speculatively to describe the upcoming war. The first use for the actual war came in its issue of September 11, 1939. One week earlier, on September 4, the day after France and the United Kingdom declared war on Germany, the Danish newspaper \"Kristeligt Dagblad\" used the term on its front page, saying \"The Second World War broke out yesterday at 11 a.m.\"\n", "BULLET::::- \"World War I/First World War\" : Originally this was called \"The Great War\" and commonly believed to be \"\"the war to end all wars\"\". However, when a second war enveloped Europe, Asia, and much of the Pacific, it became necessary to distinguish them. This convention has been used for many series of wars, going back as far as the First Peloponnesian War or earlier. Most recently, the 1991 war in the Persian Gulf, formerly called \"Desert Storm\" or just the \"Gulf War\", is now (since the 2003 invasion of Iraq) often referred to as \"The First Gulf War\".\n", "Prior to World War II, the events of 1914–1918 were generally known as the Great War or simply the World War. In October 1914, the Canadian magazine \"Maclean's\" wrote, \"Some wars name themselves. This is the Great War.\" Contemporary Europeans also referred to it as \"the war to end war\" or \"the war to end all wars\" due to their perception of its then-unparalleled scale and devastation. After World War II began in 1939, the terms became more standard, with British Empire historians, including Canadians, favouring \"The First World War\" and Americans \"World War I\".\n", "The term \"First World War\" was first used in September 1914 by German biologist and philosopher Ernst Haeckel, who claimed that \"there is no doubt that the course and character of the feared 'European War' ... will become the first world war in the full sense of the word,\" citing a wire service report in \"The Indianapolis Star\" on 20 September 1914.\n", "Prior to the beginning of the Second World War, the First World War (1914–1918) was believed to have been \"the war to end all wars,\" as it was popularly believed that never again could there possibly be a global conflict of such magnitude. During the interwar period, WWI was typically referred to simply as \"The Great War.\" The outbreak of World War II in 1939 disproved the hope that mankind might have already \"outgrown\" the need for such widespread global wars.\n", "Prior to the beginning of the Second World War, the First World War (1914–1918) was believed to have been \"the war to end all wars,\" as it was popularly believed that never again could there possibly be a global conflict of such magnitude. During the inter-war period between the two world wars, WWI was typically referred to simply as \"The Great War.\" The outbreak of World War II in 1939 disproved the hope that mankind might have already \"outgrown\" the need for such widespread global wars.\n", "World War II is generally viewed as having its roots in the aftermath of World War I, in which the German Empire under Wilhelm II, with its Central Powers, was defeated, chiefly by the United Kingdom, France, and the United States.\n" ]
How did the lion, an African animal, come to be so prominent in Chinese art and sculpture?
> an African animal I can't comment on why Chinese culture focuses on lions, but it's worth pointing out that lions once ranged throughout much of Asia as well. Although by now the only Asian lions left are in the Gir forest in India. Considering their [historic range]( _URL_0_), it's not surprising that they could have a significant influence on a lot of Asian cultures
[ "The lion is a common motif in Chinese art; it was first used in art during the late Spring and Autumn period (fifth or sixth century BC) and became more popular during the Han Dynasty (206 BC – AD 220) when imperial guardian lions started to be placed in front of imperial palaces for protection. Because lions have never been native to China, early depictions were somewhat unrealistic; after the introduction of Buddhist art to China in the Tang Dynasty after the sixth century AD, lions were usually depicted wingless with shorter, thicker bodies and curly manes. The lion dance is a traditional dance in Chinese culture in which performers in lion costumes mimic a lion's movements, often with musical accompaniment from cymbals, drums and gongs. They are performed at Chinese New Year, the August Moon Festival and other celebratory occasions for good luck.\n", "The common motif of the \"majestic and powerful\" lion was introduced to China by Buddhist missionaries from India, somewhere in the first century AD. Lions themselves, however, are not native to China, yet appear in the art of China and the Chinese people believe that lions protect humans from evil spirits, hence the Chinese New Year lion dance to scare away demons and ghosts. Chinese guardian lions are frequently used in sculpture in traditional Chinese architecture. For instance, in the Forbidden City in Beijing, two lion statues are seen in almost every door entrance.\n", "Lions were never native animals of Southeast Asia in recorded history. As the result, the depiction of lion in ancient Southeast Asian art, especially in ancient Java and Cambodia, is far from naturalistic style as depicted in Greek or Persian art counterparts, since the artist who carved the lion sculpture never saw the lion before, and all were based on perception and imagination. The cultural depictions and the reverence of lion as the noble and powerful beast in Southeast Asia was influenced by Indian culture.\n", "BULLET::::- The lion is the basis of the lion dances that form part of the traditional Chinese New Year celebrations, and of similar customs in other Asian countries. Chinese guardian lions and their Eastern, Southeastern and Southern Asian counterparts depicted in Chinese art were modeled on the basis of lions found in Indian temples. Buddhist monks, or possibly traders, possibly brought descriptions of sculpted lions guarding the entry to temples to China. Chinese sculptors then used the description to model \"Fo-Lions\" (\"Fo\" () is a character for the Buddha) temple statues after native dogs (possibly the Tibetan Mastiff) by adding a shaggy mane. Depictions of these \"Fo-lions\" have been found in Chinese religious art as early as 208 BC. The Tibetan Snow Lion (Tibetan: གངས་སེང་གེ་; Wylie: \"gangs seng ge\") is a mythical animal of Tibet. It symbolizes fearlessness, unconditional cheerfulness, the eastern quadrant and the element of Earth. It is said to range over mountains, and is commonly pictured as being white with a turquoise mane. Two Snow Lions appear on the flag of Tibet. Many East Asian languages borrowed from the Sanskrit word for lion.\n", "The comparative obscurity of the giant panda throughout most of China's history is illustrated by the fact that, despite there being a number of depictions of bears in Chinese art starting from its most ancient times, and the bamboo being one of the favorite subjects for Chinese painters, there are no known pre-20th-century artistic representations of giant pandas.\n", "\"Komainu\" strongly resemble Chinese guardian lions and in fact originate from Tang dynasty China. The Chinese guardian lions are believed to have been influenced by lion pelts and lion depictions introduced through trade from either the Middle East or India, countries where the lion existed and was a symbol of strength.\n", "In the traditional Chinese culture, the rooster had been given a significant place. Ancient Chinese people believed that the rooster was a kind of moral animal with excellent qualities. This aspect also affected the neighboring Asian countries. In the Joseon dynasty of the Korean peninsula, auspicious creatures such as the tiger, dragon, crane and deer were represented in a series of artworks demonstrating the importance and universality of these creatures in the Korean Art and culture. The painting, \"Golden Cock and Hen\" was created in the early 19th century AD, during Korean peninsula’s Joseon dynasty. The painting itself measures 114.3 cm in height and 45.7 cm in width. With the external decorative elements, the complete piece measures 200.7 cm in height and 62.9 cm in width. Due to the lack of documentation, the artist and the specific creation date of the painting cannot be predicated.\n" ]
how do spiders make noises?
A couple ways. First, they have bristles all around their body that can be rubbed to make purring or buzzing noises. Second, some types can force air out of their breathing holes (spiders don't breath through their mouths!) to create hissing or screaming noises (think, like a kettle with air being forced out of it -- or a balloon with air being squeezed out). Edit: [Here's my favourite spider gif. Conveniently, it's also my favourite ant gif.](_URL_0_)
[ "Males of \"Heteropoda venatoria\", one of the huntsman spiders that seems to easily find its way around the world, have recently been found to deliberately make a substrate-borne sound when they detect a chemical (pheromone) left by a nearby female of their species. The males anchor themselves firmly to the surface onto which they have crawled and then use their legs to transmit vibrations from their bodies to the surface. Most of the sound emitted is produced by strong vibrations of the abdomen. The characteristic frequency of vibration and the pattern of bursts of sound identify them to females of their species, who will approach if they are interested in mating. This sound can often be heard as a rhythmic ticking, somewhat like a quartz clock, which fades in and out and can be heard by human ears in a relatively quiet environment. \n", "It is also widespread among decapod crustaceans, e.g., rock lobsters. Most spiders are silent, but some tarantula species are known to stridulate. When disturbed, \"Theraphosa blondi\", the Goliath tarantula, can produce a rather loud hissing noise by rubbing together the bristles on its legs. This is said to be audible to a distance of up to 15 feet (4.5 m). One of the wolf spiders, \"Schizocosa stridulans\", produces low-frequency sounds by flexing its abdomen (tremulation, rather than stridulation) or high-frequency stridulation by using the cymbia on the ends of its pedipalps.\n", "Spiders, like other arthropods, have sensors, often modified setae (bristles), for smell, taste, touch and vibration protruding through their cuticle (\"skin\"). Unlike insects, spiders and other chelicerates do not have antennae. A \"Portia\" can sense vibrations from surfaces, and use these for mating and for hunting other spiders in total darkness. It can use air- and surface \"smells\" to detect prey which it often meets, to identify members of the same species, to recognise familiar members, and to determine the sex of other member of the same species.\n", "Spiders, like other arthropods, have sensors, often modified setae (bristles), for smell, taste, touch and vibration protruding through their cuticle (\"skin\"). Unlike insects, spiders and other chelicerates do not have antennae. A \"Portia\" can sense vibrations from surfaces, and use these for mating and for hunting other spiders in total darkness. It can use air- and surface \"smells\" to detect prey which it often meets, to identify members of the same species, to recognise familiar members, and to determine the sex of other member of the same species.\n", "Spiders, like other arthropods, have sensors, often modified setae (bristles), for smell, taste, touch and vibration, protruding through their cuticle (\"skin\"). A \"Portia\" can sense vibrations from surfaces, and use these for mating and for hunting other spiders in total darkness. It can use air- and surface \"smells\" to detect prey which it often meets, to identify members of the same species, to recognise familiar members, and to determine the sex of other member of the same species.\n", "Sounds produced by Geoffroy's spider monkey include barks, whinnies, squeals, squeaks and screams. Barks are typically alarm calls. Whinnies and screams can be used as distress calls, and are also made at dawn and at dusk. Each monkey makes a unique sound, which may allow monkeys to recognize each other through vocal communication alone. Several researchers have investigated the use of whinnies, which consist of between two and 12 quick increases and decreases in pitch, in more detail. This research has indicated one additional purpose of whinnies is to call other group members to a food source. Other purposes of whinnies suggested by this research have included maintaining vocal contact with other group members while traveling and distinguishing between group members and members of other groups.\n", "They also possess two types of stridulatory organs. The first type is located at the posterior tips of their cephalothorax (the prosoma) in the form of two triangular protrusions. The spiders rub these structures with a matching pair of sclerotized plates at the anterior portion of the abdomen, producing sound. These structures are more prominent in females. They also possess stridulatory files (in the form of a series of small ridges) on their chelicerae which are rubbed against the pedipalps to produce sound. The second type is more prominent in males.\n" ]
Old paintings and portraits
Could you specify what you mean by "weird"?
[ "Portrait paintings are representations of a person, in which the face and its expression is predominant. The intent is to display the likeness, personality, and even the mood of the person. The art of the portrait flourished in Ancient Greek and especially Roman sculpture, where sitters demanded individualized and realistic portraits, even unflattering ones. One of the best-known portraits in the Western world is Leonardo da Vinci's painting titled \"Mona Lisa\", which is thought to be a portrait of Lisa Gherardini, the wife of Francesco del Giocondo.\n", "Self-Portrait or Portrait of an Old Man is an oil on canvas painting by El Greco, dating to between 1595 and 1600 and usually identified as a self-portrait. It shows the influence of Titian and Tintoretto, picked up by El Greco in Venice. It is now in the Metropolitan Museum of Art in New York. \n", "Much the largest group of painted portraits are the funeral paintings that survived in the dry climate of Egypt's Fayum district (see illustration, below), dating from the 2nd to 4th century AD. These are almost the only paintings of the Roman period that have survived, aside from frescos, though it is known from the writings of Pliny the Elder that portrait painting was well established in Greek times, and practiced by both men and women artists. In his times, Pliny complained of the declining state of Roman portrait art, \"The painting of portraits which used to transmit through the ages the accurate likenesses of people, has entirely gone out…Indolence has destroyed the arts.\" These full-face portraits from Roman Egypt are fortunate exceptions. They present a somewhat realistic sense of proportion and individual detail (though the eyes are generally oversized and the artistic skill varies considerably from artist to artist). The Fayum portraits were painted on wood or ivory in wax and resin colors (encaustic) or with tempera, and inserted into the mummy wrapping, to remain with the body through eternity.\n", "Not all of the portraits are exceptional artistically, although there are self-portraits by William Hogarth, Sir Joshua Reynolds and other British artists of note. Some, such as the group portrait of the participants in the Somerset House Conference of 1604, are important historical documents in their own right. Often, the curiosity value is greater than the artistic worth of a work, as in the case of the anamorphic portrait of Edward VI by William Scrots, Patrick Branwell Brontë's painting of his sisters Charlotte, Emily and Anne, or a sculpture of Queen Victoria and Prince Albert in medieval costume. Portraits of living figures were allowed from 1969. In addition to its permanent galleries of historical portraits, the National Portrait Gallery exhibits a rapidly changing selection of contemporary work, stages exhibitions of portrait art by individual artists and hosts the annual BP Portrait Prize competition.\n", "The art of the portrait flourished in Ancient Greek and especially Roman sculpture, where sitters demanded individualized and realistic portraits, even unflattering ones. During the 4th century, the portrait began to retreat in favor of an idealized symbol of what that person looked like. (Compare the portraits of Roman Emperors Constantine I and Theodosius I at their entries.) In the Europe of the Early Middle Ages representations of individuals are mostly generalized. True portraits of the outward appearance of individuals re-emerged in the late Middle Ages, in tomb monuments, donor portraits, miniatures in illuminated manuscripts and then panel paintings.\n", "A number of his paintings were considered to be self-portraits. A \"Portrait of a Young Man \"in the National Gallery, London was formerly believed to be a self-portrait, as was the Portrait of Becuccio Bicchieraio in National Gallery of Scotland, but both are now known not to be. There is a self-portrait at Alnwick Castle, a young man about twenty years, with his elbow on a table. Another youthful portrait is in the Uffizi Gallery, and the Pitti Palace contains more than one.\n", "Historically, portrait paintings have primarily memorialized the rich and powerful. Over time, however, it became more common for middle-class patrons to commission portraits of their families and colleagues. Today, portrait paintings are still commissioned by governments, corporations, groups, clubs, and individuals. In addition to painting, portraits can also be made in other media such as prints (including etching and lithography), photography, video and digital media.\n" ]
how do billboards work?
> Who owns them? Most billboards will have a small sign on them that states who owns it. Most in my area are owned by VIACOM. That might be true everyware or not, I assume it depends on area. > Who regulates them and determines how many billboards can appear in a certain area? Some city's would have rules where they can or cannot be placed, some don't. It's something that is goverened at the local level. > Do the landowners where they appear get paid for allowing them to be built on their property? Yes, the company would likely lease a small strip of the land. > How much do they cost? As with all things, this is determined by supply and demand. So billboards that are in high traffic areas would cost much more and ones in the middle of nowhere would cost less. There is no hard price guide. But for the most part they are priced with a large payment to cover the construction of the new sign (you would likely need to provide the design) and then have a monthly rent component depending on how long you wanted it to stay up. > How successful are they and have they been negatively affected since the Internet (a la the newspaper industry's ads)? Newspaper adds are down because fewer people are looking at newspapers. As the internet has not affected peoples need to get around (much) I do not imagine there has been much slump in billboard adds.
[ "A billboard (also called a hoarding in the UK and many other parts of the world) is a large outdoor advertising structure (a billing board), typically found in high-traffic areas such as alongside busy roads. Billboards present large advertisements to passing pedestrians and drivers. Typically showing witty slogans and distinctive visuals, billboards are highly visible in the top designated market areas.\n", "Billboards may be multi-purpose. An advertising sign can integrate its main purpose with telecommunications antenna or public lighting support. Usually the structure has a steel pole with a coupling flange on the above-fitted advertising billboard structure that can contain telecommunications antennas. The lighting, wiring, and any antennas are placed inside the structure.\n", "Billboard advertising includes advertising billboards of more than 8m². These formats can be adapted for many different purposes, such as for event artworks (for example: building wraps), which is operated by JCDecaux under the brand \"Artvertising\".\n", "A human billboard is someone who applies an advertisement on his or her person. Most commonly, this means holding or wearing a sign of some sort, but also may include wearing advertising as clothing or in extreme cases, having advertising tattooed on the body. Sign holders are known as human directionals in the advertising industry, or colloquially as sign walkers, sign wavers, sign twirlers or (in British territories) sandwich men. Frequently, they will spin or dance or wear costumes with the promotional sign in order to attract attention.\n", "Billboard – Billboards (or Bulletins) are usually located in highly visible, heavy traffic areas such as expressways, primary arterials, and major intersections. In the U.S. bulletins are usually illuminated. The ad artwork, commonly digitally printed on large vinyl coated fabric membranes, is often \"rotated\" by the outdoor plant operator amongst several locations in a metropolitan area to achieve the desired reach of the population as defined in the sales contract. With extended periods of high visibility, billboard advertisements provide advertisers with significant impact on commuters. This is the largest standard out of home advertising format, usually measuring at 14ftx48ft in overall size.\n", "A mobile billboard is a device used for advertising on the sides of a truck or trailer that is typically mobile. Mobile billboards are a form of out-of-home advertising (OOH); radio, static billboards, and mall/airport advertising fall into this same category. Using a mobile billboard for advertising is an advertising niche called mobile outdoor advertising.\n", "Not all billboards are used for advertising products and services—non-profit groups and government agencies use them to communicate with the public. In 1999 an anonymous person created the God Speaks billboard campaign in Florida \"to get people thinking about God\", with witty statements signed by God. \"Don't make me come down there\", \"We need to talk\" and \"Tell the children that I love them\" were parts of the campaign, which was picked up by the Outdoor Advertising Association of America and continues today on billboards across the country.\n" ]
Are there other theoretical dimensions that are not spatial or temporal?
In relativity, the difference between a spacial and temporal dimension is how we measure distances. If two events are separated only by time (say you now and you still sitting on your chair in 5 minutes), the distance between these two events is negative (or positive, in the other convention). In the case where the distance is spatial (say you and the statue of liberty, measured now), then this distance is positive (or negative, in the other convention). That being said, if you introduce another dimension and require the metric to be real, then this extra dimension can only give a positive or a negative contribution to the distance, thus making it either spatial or temporal.
[ "It is therefore common (though not universal), for B-theorists to be four-dimensionalists, that is, to believe that objects are extended in time as well as in space and therefore have temporal as well as spatial parts. This is sometimes called a time-slice ontology.\n", "Unlike the four dimensionalist, the three dimensionalist considers time to be a unique dimension that is not analogous to the three spatial dimensions: length, width and height. Whereas the four dimensionalist proposes that objects are extended across time, the three dimensionalist adheres to the belief that all objects are wholly present at any moment at which they exist. While the three dimensionalist agrees that the parts of an object can be differentiated based on their spatial dimensions, they do not believe an object can be differentiated into temporal parts across time. For example, in the three dimensionalist account, \"Descartes in 1635\" is the same object as \"Descartes in 1620\", and both are identical to Descartes, himself. However, the four dimensionalist considers these to be distinct temporal parts.\n", "In philosophy, four-dimensionalism (also known as the \"doctrine of temporal parts\") is an ontological position that an object's persistence through time is like its extension through space. Thus, an object that exists in time has temporal parts in the various subregions of the total region of time it occupies, just like an object that exists in a region of space has at least one part in every subregion of that space.\n", "There are two kinds of dimensions, spatial (bidirectional) and temporal (unidirectional). Let the number of spatial dimensions be \"N\" and the number of temporal dimensions be \"T\". That \"N\" = 3 and \"T\" = 1, setting aside the compactified dimensions invoked by string theory and undetectable to date, can be explained by appealing to the physical consequences of letting \"N\" differ from 3 and \"T\" differ from 1. The argument is often of an anthropic character and possibly the first of its kind, albeit before the complete concept came into vogue.\n", "A temporal dimension is a dimension of time. Time is often referred to as the \"fourth dimension\" for this reason, but that is not to imply that it is a spatial dimension. A temporal dimension is one way to measure physical change. It is perceived differently from the three spatial dimensions in that there is only one of it, and that we cannot move freely in time but subjectively move in one direction.\n", "Our physical space is observed to have three large spatial dimensions and, along with time, is a boundless 4-dimensional continuum known as spacetime. However, nothing prevents a theory from including more than 4 dimensions. In the case of string theory, consistency requires spacetime to have 10 dimensions (3D regular space + 1 time + 6D hyperspace). The fact that we see only 3 dimensions of space can be explained by one of two mechanisms: either the extra dimensions are compactified on a very small scale, or else our world may live on a 3-dimensional submanifold corresponding to a brane, on which all known particles besides gravity would be restricted.\n", "A three-dimensional Euclidean space is a special case of a Euclidean space. In Bourbaki's terms, the species of three-dimensional Euclidean space is \"richer\" than the species of Euclidean space. Likewise, the species of compact topological space is richer than the species of topological space.\n" ]
how can it been cheaper to buy something new than to repair it?
Two answers you were given so far reference something called [economies of scale](_URL_0_) which means that making a whole lot of something means each one by itself can be made cheaper than by not making a lot of something. And that's not a wrong answer to your question. But it's also not the only answer to your question. Sometimes the creation process for something is just easier than the repair process. Let me demonstrate with a set of instructions that I want you to imagine yourself doing. 1. Go make a cake. Two layers, with cream and icing, decorated with "Congratulations" and little icing flowers on top. 2. Punch the cake. Put a nice big hole in it. Now you have two options. You can spend time to clean up the splatter, take measurements of the dimensions and volume of the hole, make some extra bit of cake and carve it into the exaact shape of the hole, place in in, fill cream again in the right places, add the bits of frosting needed to complete the words and flowers as they looked before and smooth everything over so you can't see any seems. Or you can just make a whole new cake. Which one do you think will take less time?
[ "BULLET::::- The first, obvious advantage is having the item available again, which aides in the restoration of a vehicle to the correct, factory specifications. It also cancels the need to find a good used part otherwise not available new, or the sourcing out of NOS parts (New Old Stock) which can be a difficult, time consuming task and often an expensive one due to their rarity. Many auto manufacturers actually discard or even destroy new parts that have been stocked unused for long periods.\n", "Repairable components tend to be more expensive than non-repairable components (consumables). This is because for items that are inexpensive to procure, it is often more cost-effective not to maintain (repair) them. Repair costs can be expensive, including costs for the labor for the removal the broken or worn out part (described as unserviceable), cost of replacement with a working (serviceable) from inventory, and also the cost of the actual repair, including possible shipping costs to a repair vendor.\n", "When an item is no longer of use to a person they may sell or \"pawn\" it, especially when they are in need of money. Items can also be sold (or taken away free of cost) as scrap (e.g. a broken-down old car will be towed away for free for its scrap metal value). Owners may sell the good themselves or to a dealer who then sells it on for a profit. They may also choose to give it away to another person this is often referred to as freecycling. However, because the process takes some effort on part of the owner they may simply keep possession of it or dump it at a landfill instead of going to the trouble of selling it. It has been common to buy secondhand or used good on markets or bazaars for long time. When the web became popular, it became common with websites such as eBay and Yahoo! Classifieds.\n", "In other cases, consumers must weigh the expected cost, in both dollars and personal inconvenience, of future repairs against the investment and operating expenses of a newer, more reliable model. Durability, then, may be defined as the amount of use one gets from a product before it breaks down and replacement is preferable to continued repair.\n", "Restoration of a car is a daunting task, not one to be undertaken lightly, or by the inexperienced. A full restoration can take many years and can cost tens of thousands of dollars; often, and generally, well in excess of what the finished value of the car will be. Many jobs will have to be farmed out to specialty shops; those with the special knowledge and equipment to do the job. Often a restoration once started is left unfinished and the car and parts can be purchased for a fraction of their worth. However, if a person buys an unfinished project, it is imperative to be sure that all of the parts are there. Finding parts for an orphan or rare car can sometimes be impossible. This necessitates the fabrication of parts from scratch, generally at great effort and expense.\n", "BULLET::::- Consumer requires repair or replacement: The seller must repair or replace the goods within a reasonable amount of time, incurring all costs necessary to perform this task. This cannot be required if it is impossible or disproportionate in consideration of other available remedies.\n", "If the car is returned in a damaged state that affects re-sale at the end of the contract, a fee will be imposed to repair the damage. If the car is returned in good condition, the customer may be rewarded with a £250 bonus.\n" ]
Does air quality get better after a storm passed through an area?
Yes for a time air quality improves after a storm passes through. The mechanism is called "precipitation scavenging" in which droplets of rain will absorb particulate matter as they fall towards the ground. This is the primary mechanism - removal of PM in the air. There is no Wikipedia page I could find specifically on this subject, but [here](_URL_0_) is a paper from Lawrence Livermore that has a good introduction on the topic. Incidentally, a scrubber used to remove pollutants from an industrial process (or even mobile ones used for ships at berth) works on basically the same principle.
[ "Considering that North Americans spend a large proportion of their lives indoors, it’s clear why this is a key issue in designing healthy spaces. Additionally, air quality is not a stand-alone problem; rather, every other component of the home can affect air quality. Air quality can be compromised by off-gassing from cabinetry, countertops, flooring, wall coverings or fabrics; by cooking by-products released into the air, and by mold caused by excess moisture or poor ventilation.\n", "Weatherization can have a negative impact on indoor air quality, especially among occupants with respiratory illnesses. This occurs because of a decrease in air exchange in the home, and resulting increase in moisture. This leads to higher concentrations of pollutants in the air.\n", "Both indoor and outdoor air quality can be improved, which may prevent COPD or slow the worsening of existing disease. This may be achieved by public policy efforts, cultural changes, and personal involvement.\n", "There are geographic patterns to air quality problems and MyEnvironment provides a map so that citizens can see what their relative exposure may be especially as they live near major traffic areas, near regulated facilities, or in proximity to confined animal feeding operations. The Clean Air Act is the law that defines EPA's responsibilities for protecting and improving the national air quality.\n", "In certain weather conditions during the summer, prevailing westerly winds blow air pollution from vehicles and from ships in Vancouver harbour east up the triangular delta, trapping it between the Coast Mountains on the north and the Cascades on the southeast. Air quality suffers. This usually occurs during a temperature inversion, and lasts for a few days. Ground-level ozone tends to be from local sources in the valley and varies with prevailing winds. With prevailing winds from the northeast during the late fall and winter, air quality is seldom a problem.\n", "Good air quality is vital for the refuge to maintain itself. A few problems dealing with air pollution are carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and sulfur dioxide. The primary producers of these pollutants are vehicle emissions, power plants, and industrial activities. The Indian River Lagoon area is said to have good air quality. Sometimes occasional temperate increases can temporarily degrade the air quality below the accepted levels.\n", "Weatherization generally does not cause indoor air problems by adding new pollutants to the air. (There are a few exceptions, such as caulking, that can sometimes emit pollutants.) However, measures such as installing storm windows, weather stripping, caulking, and blown-in wall insulation can reduce the amount of outdoor air infiltrating into a home. Consequently, after weatherization, concentrations of indoor air pollutants from sources inside the home can increase.\n" ]
why does honey form small coils when it's being poured?
Destin from Smarter Every Day has a video on this: _URL_0_
[ "According to the traditional methods of preparation, honeycombs are crushed, and the balls of wax containing 20-30% of honey are collected in generic containers. In the days immediately after all the honey extract has settled, the remaining combs containing honey and pollen are dipped in hot water (~ 50 °C), so that the water dissolves all the honey still present in the combs. At this point, any remaining lumps of wax and pollen are broken up through the use of a suitable mixer or by hand. The remaining wax is then pressed further to squeeze out any remaining liquid and is then stored in appropriate containers. The remaining liquid from the previous step is filtered, for example with a linen cloth, at least twice, and then placed in a suitable high-capacity boiler (sometimes made of copper) where it is boiled and concentrated via decoction. During this concentration process, finely cut lemon or orange rinds are added, and any impurities on the surface of the liquid are removed. The content of the boiler becomes gradually syrupy and must be kept in constant motion to prevent the product from sticking on the bottom and developing a smokey flavour. The liquid also becomes caramelized, becoming dark like molasses but much more complex, with a toasty flavour that has hints of coffee and caramel. When the liquid assumes a consistency similar to that of honey, the heating is interrupted, and the boiler is deposited in a secluded place and allowed to cool before the abbamele is drained.\n", "Honey is sufficiently viscous that the surface perturbations that lead to breakup are almost fully damped from honey threads. This results in the production of long filaments of honey rather than individual droplets.\n", "Most types of honey are Newtonian liquids, but a few types have non-Newtonian viscous properties. Honeys from heather or manuka display thixotropic properties. These types of honey enter a gel-like state when motionless, but then liquify when stirred.\n", "High-quality honey can be distinguished by fragrance, taste, and consistency. Ripe, freshly collected, high-quality honey at should flow from a knife in a straight stream, without breaking into separate drops. After falling down, the honey should form a bead. The honey, when poured, should form small, temporary layers that disappear fairly quickly, indicating high viscosity. If not, it indicates excessive water content (over 20%)\n", "Fermentation of honey usually occurs after crystallization, because without the glucose, the liquid portion of the honey primarily consists of a concentrated mixture of fructose, acids, and water, providing the yeast with enough of an increase in the water percentage for growth. Honey that is to be stored at room temperature for long periods of time is often pasteurized, to kill any yeast, by heating it above .\n", "Both rely on the use of centrifugal force to force the honey out of the cells. During the extraction process the honey is forced out of the uncapped wax cells, runs down the walls of the extractor and pools at the bottom. A tap or honey pump allows for the removal of honey from the extractor. Honey must be removed in time and always stay below the rotating frames as otherwise it prevents extractor from spinning with sufficient speed.\n", "The most popular method of harvesting honey from a top-bar hive is by cutting the comb from the top-bar, crushing the comb and straining the honey. This results in honey with a higher pollen content than honey that is extracted by flinging out without crushing the comb. Top-bar hive comb can be extracted by flinging motion e.g. in a hobbyist or commercial rotary extractor, but it can be problematic, because (a) if no foundation was used, the comb will break more easily during rotary movement, (b) top-bar hives combs have irregular or non-standard sizes that do not fit into commercially available extractors, (c) if the comb is not uniformly flat, it may be difficult to uncap the cells, which is required for rotary extraction and (d) not all rotary extractors have cages or mesh to prevent loose pieces of comb from falling into the drum.\n" ]
Is there anything saltier than table salt?
Well, how strongly you taste something is mostly determined by how "well-fitting" molecules of the substance are to your tastebud receptors. For sodium, there are specific receptors that have evolved to strongly fit Na+, termed ENaC. Though there are other receptors that are taste ions from salt more broadly (K+, NH4+, etc), I think the implication is that since there are specific ones for Na+, we will taste the Na+ part of NaCl more strongly than any other salt. Check the paper [here](_URL_0_) for more details.
[ "Table salt is made up of just under 40% sodium by weight, so a 6g serving (1teaspoon) contains about 2,300mg of sodium. Sodium serves a vital purpose in the human body: via its role as an electrolyte, it helps nerves and muscles to function correctly, and it is one factor involved in the osmotic regulation of water content in body organs (fluid balance). Most of the sodium in the Western diet comes from salt. The habitual salt intake in many Western countries is about 10 g per day, and it is higher than that in many countries in Eastern Europe and Asia. The high level of sodium in many processed foods has a major impact on the total amount consumed. In the United States, 75% of the sodium eaten comes from processed and restaurant foods, 11% from cooking and table use and the rest from what is found naturally in foodstuffs.\n", "Salt is essential to the health of humans and other animals, and it is one of the five basic taste sensations. Salt is used in many cuisines around the world, and it is often found in salt shakers on diners' eating tables for their personal use on food. Salt is also an ingredient in many manufactured foodstuffs. Table salt is a refined salt containing about 97 to 99 percent sodium chloride. Usually, anticaking agents such as sodium aluminosilicate or magnesium carbonate are added to make it free-flowing. Iodized salt, containing potassium iodide, is widely available. Some people put a desiccant, such as a few grains of uncooked rice or a saltine cracker, in their salt shakers to absorb extra moisture and help break up salt clumps that may otherwise form.\n", "Because the salt has a purer flavor due to the lack of metallic or bitter-tasting additives such as iodine, fluoride or dextrose, it is often used in the kitchen instead of additive-containing table salt, so such flavors are not introduced to prepared food. Estimating the amount of salt when salting by hand can also be easier due to the larger grain size. Some recipes specifically call for volume measurement of kosher/kitchen salt, which weighs less per measure due to its lower density and is therefore less salty than an equal volume measurement of table salt. Different brands of different salt vary dramatically; a measure of one brand may be twice as salty as a measure of another.\n", "The health consequences of eating sea salt or regular table salt are the same, as the content of sea salt is still mainly sodium chloride. Table salt is more processed than sea salt to eliminate minerals and usually contains an additive such as silicon dioxide to prevent clumping.\n", "Himalayan salt is used to flavor food. It is recognized by its distinctive pink hue, which has led to a misconception that it is healthier than common table salt. There is no scientific evidence to support such assertions. Blocks of salt are also used as serving dishes, baking stones, and griddles. In the United States, the Food and Drug Administration warned a manufacturer about marketing the salt as a dietary supplement with unproven claims of health benefits. \n", "Salt substitutes are low-sodium table salt alternatives marketed to circumvent the risk of high blood pressure and cardiovascular disease associated with a high intake of sodium chloride while maintaining a similar taste. They usually contain mostly potassium chloride (also known as potassium salt), whose toxicity is approximately equal to that of table salt in a healthy person (the is about 2.5 g/kg, or approximately 190 g for a person weighing 75 kg). Potassium lactate may also be used to reduce sodium levels in food products. It is commonly used in meat and poultry products. The recommended daily allowance of potassium is higher than that for sodium, yet a typical person consumes less potassium than sodium in a given day. Seaweed granules are also marketed as alternatives to salt.\n", "Salt, also referred to as table salt or by its chemical formula NaCl, is an ionic compound made of sodium and chloride ions. All life has evolved to depend on its chemical properties to survive. It has been used by humans for thousands of years, from food preservation to seasoning. Salt's ability to preserve food was a founding contributor to the development of civilization. It helped to eliminate dependence on seasonal availability of food, and made it possible to transport food over large distances. However, salt was often difficult to obtain, so it was a highly valued trade item, and was considered a form of currency by certain peoples. Many salt roads, such as the via Salaria in Italy, had been established by the Bronze age.\n" ]
why is plastic surgery "plastic"?
"Plastic" means "capable of being molded or shaped into forms". The substance called "plastic" was named after this property, and the surgery term uses the first meaning.
[ "Plastic surgery is a surgical specialty involving the restoration, reconstruction, or alteration of the human body. It can be divided into two categories. The first is reconstructive surgery which includes craniofacial surgery, hand surgery, microsurgery, and the treatment of burns. The other is cosmetic or aesthetic surgery. While reconstructive surgery aims to reconstruct a part of the body or improve its functioning, cosmetic surgery aims at improving the appearance of it. Both of these techniques are used throughout the world.\n", "Plastics have many uses in the medical field as well, with the introduction of polymer implants and other medical devices derived at least partially from plastic. The field of plastic surgery is not named for use of plastic materials, but rather the meaning of the word plasticity, with regard to the reshaping of flesh.\n", "Surgery is defined as treating injuries or conditions with operative instrumental treatment. Plastic is a derivative of the Greek word \"plastikos\", which means \"to build up\" or \"to take form\". This is a logical prefix, as parts of the body are remade or reformed during most reconstructive and cosmetic surgical procedures. Children make up roughly 3% of all plastic surgery procedures, and the majority of these procedures correct a congenital deformity.\n", "In the term \"plastic surgery,\" the adjective \"plastic\" implies \"sculpting\" and/or \"reshaping\", which is derived from the Greek πλαστική (τέχνη), \"plastikē\" (\"tekhnē\"), \"the art of modelling\" of malleable flesh. This meaning in English is seen as early as 1598. The surgical definition of \"plastic\" first appeared in 1839, preceding the modern \"engineering material made from petroleum\" sense of plastic (coined by Leo Baekeland in 1909) by 70 years.\n", "Plastic surgery is a broad field, and may be subdivided further. In the United States, plastic surgeons are board certified by American Board of Plastic Surgery. Subdisciplines of plastic surgery may include:\n", "Plastic surgery or reconstructive surgery is available in many cases to disfigured people. Some health insurance companies and government health care systems cover plastic surgery for these problems when they do not generally cover plastic surgery for what is labeled as \"cosmetic purposes\".\n", "The term \"plastics\" covers a range of synthetic or semi-synthetic organic condensation or polymerization products that can be molded or extruded into objects, films, or fibers. Their name is derived from the fact that in their semi-liquid state they are malleable, or have the property of plasticity. Plastics vary immensely in heat tolerance, hardness, and resiliency. Combined with this adaptability, the general uniformity of composition and lightness of plastics ensures their use in almost all industrial applications today. High performance plastics such as ETFE have become an ideal building material due to its high abrasion resistance and chemical inertness. Notable buildings that feature it include: the Beijing National Aquatics Center and the Eden Project biomes.\n" ]
Is Carl Jung's work relevant?
The psychiatrists I know don't think much of Jung (YMMV). However, I would point you to [Joseph Campbell](_URL_0_). His work is heavily derived from Jung's and is considered quite relevant in fields like cultural anthropology. In fact more people learn about Jung's ideas from exposure to Campbell than from reading Jung.
[ "Jung's writings have been studied by people of many backgrounds and interests, including theologians, people from the humanities, and mythologists. Jung often seemed to seek to make contributions to various fields, but he was mostly a practicing psychiatrist, involved during his whole career in treating patients. A description of Jung's clinical relevance is to address the core of his work.\n", "Jung began his career as a psychiatrist in Zürich, Switzerland. There, he conducted research for the Word Association Experiment at the Burghölzli Clinic. Jung's research earned him a worldwide reputation and numerous honours, including an honorary degree from Clark University, Massachusetts, in 1904; another honorary degree from Harvard University in 1936; recognition from the University of Oxford and the University of Calcutta; and appointment as a Fellow of the Royal Society of Medicine, England.\n", "Jung had an apparent interest in the paranormal and occult. For decades he attended seances and claimed to have witnessed \"parapsychic phenomena\". Initially he attributed these to psychological causes, even delivering 1919 lecture in England for the Society for Psychical Research on \"The Psychological Foundations for the belief in spirits\". However, he began to \"doubt whether an exclusively psychological approach can do justice to the phenomena in question\" and stated that \"the spirit hypothesis yields better results\".\n", "It is important to state that Jung seemed to often see his work as not a complete psychology in itself but as his unique contribution to the field of psychology. Jung claimed late in his career that only for about a third of his patients did he use \"Jungian analysis\". For another third, Freudian psychology seemed to best suit the patient's needs, and for the final third Adlerian analysis was most appropriate. In fact, it seems that most contemporary Jungian clinicians merge a developmentally grounded theory, such as Self psychology or Donald Winnicott's work, with the Jungian theories in order to have a \"whole\" theoretical repertoire for actual clinical work.\n", "Jung obtained a bachelor degree from the University of Colorado in 1986 and obtained his PhD in clinical psychology from the University of New Mexico in 2001. Jung is a member of the American Psychological Association (division 40, clinical neuropsychology), the International Society of Intelligence Research (ISIR), and Heterodox Academy. Jung sits on the editorial board of \"Intelligence\", \"Frontiers in Psychiatry\" (neuroimaging and stimulation), and \"Public Library of Science\" (PLoS ONE).\n", "Jung's work on himself and his patients convinced him that life has a spiritual purpose beyond material goals. Our main task, he believed, is to discover and fulfill our deep, innate potential. Based on his study of Christianity, Hinduism, Buddhism, Gnosticism, Taoism, and other traditions, Jung believed that this journey of transformation, which he called individuation, is at the mystical heart of all religions. It is a journey to meet the self and at the same time to meet the Divine. Unlike Freud's objectivist worldview, Jung's pantheism may have led him to believe that spiritual experience was essential to our well-being, as he specifically identifies individual human life with the universe as a whole. Jung's ideas on religion counterbalance Freudian skepticism. Jung's idea of religion as a practical road to individuation is still treated in modern textbooks on the psychology of religion, though his ideas have also been criticized.\n", "A Jungian scholar, Mayes has produced the first book-length studies in English on the pedagogical applications of Jungian and post-Jungian psychology, which is based on the work of Carl Gustav Jung (1875–1961). Jungian psychology is also called analytical psychology. Mayes' work, situated in the humanities and depth psychology, is thought to offer an alternative to the social sciences model. \n" ]
AskHistorians Podcast 115 - The Friends They Loathed - Quaker Religion and Persecution in the American Revolution
Thank you as always to the incredible podcast team and all of you who participate on it! Looking forward to sitting down and having a listen.
[ "Engardio's documentary film \"Knocking\" explored how the unpopular religion of Jehovah's Witnesses played a major role in First Amendment history, setting Supreme Court precedents that expanded individual liberties for all Americans. In interviews, Engardio said \"Knocking\" is not about the theology of Jehovah's Witnesses but instead uses the religion as a case study to examine how disparate and disagreeable groups can hold their unique beliefs without marginalizing or limiting the freedom of others. \"We may not be each others' cup of tea,\" Engardio said on NPR, \"but tolerance allows a variety of kettles to peacefully share the stove.\" \"Knocking\" won several film festival awards including Best Documentary at the USA Film Festival and was covered in Newsweek, USA Today and newspapers across the United States. Entertainment Weekly named it \"What to Watch.\" \"Knocking\" was broadcast in the United States on PBS. It was also broadcast in Australia, Canada, Greece and Israel. \"Knocking\" was released on DVD in English, Spanish, Portuguese, Russian and Korean. Critics of Jehovah's Witnesses said the film did not deal harshly enough with controversies surrounding the religion, like the practice of shunning. Engardio told film festival audiences that \"Knocking\" contained criticism organic to the film's story. Engardio has written Washington Post essays critical of Jehovah's Witness practices, including shunning and refusal of blood transfusions. Engardio has also written essays for the Washington Post and USA Today about civil rights issues involving Jehovah's Witnesses outside the scope of his film. Most notable was the 2010 ruling by a federal judge that overturned California's ban on gay marriage, in which the key legal precedent cited by the judge was a 1943 Supreme Court case won by Jehovah's Witnesses. Another Washington Post essay by Engardio warns that a ban on Jehovah's Witnesses in Russia is a dangerous precedent that could lead to the loss of freedoms for other unpopular groups in the emerging democracy.\n", "Friends Historical Library was established in 1871 to collect, preserve, and make available archival, manuscript, printed, and visual records concerning the Religious Society of Friends (Quakers) from their origins mid-seventeenth century to the present. Besides the focus on Quaker history, the holdings are a significant research collection for the regional and local history of the middle-Atlantic region of the United States and the history of American social reform. Quakers played prominent roles in almost every major reform movement in American history, including abolition, African-American history, Indian rights, women's rights, prison reform, humane treatment of the mentally ill, and temperance. The collections also reflect the significant role Friends played in the development of science, technology, education, and business in Britain and America. The Library also maintains the Swarthmore College Archives and the papers of the Swarthmore Historical Society.\n", "The Revolution's legacy impacted American Quakers in one other major way. Before the war, many Quakers possessed extensive economic and political power in several states, most notably in Pennsylvania and New Jersey. However, the war had alienated the pacifist Quakers from their neighbors, causing most Friends in power to begin withdrawing from active political life as early as the 1760s. The Revolution increased American Quakers' sense of isolation, consequently making postwar Quakerism less culturally diverse and more dogmatically unified. American Quakers would never regain the amount of political influence they had once possessed.\n", "The Quakers were involved in many of the great reform movements of the first half of the 19th century. After the Civil War they won over President Grant to their ideals of a just policy toward the American Indians, and became deeply involved in Grant's \"Peace Policy\". Quakers were motivated by high ideals, played down the role of conversion to Christianity, and worked well side by side with the Indians. They had been highly organized and motivated by the anti-slavery crusade, and after the Civil War were poised to expand their energies to include both ex-slaves and the western tribes. They had Grant's ear and became the principal instruments for his peace policy. During 1869–85, they served as appointed agents on numerous reservations and superintendencies in a mission centered on moral uplift and manual training. Their ultimate goal of acculturating the Indians to American culture was not reached because of frontier land hunger and Congressional patronage politics.\n", "\"Knocking\" explored how the unpopular religion of Jehovah's Witnesses played a major role in First Amendment history, setting Supreme Court precedents that expanded individual liberties for all Americans.\n", "Several notable figures in the American Revolution were also Quakers. Thomas Paine, author of the pamphlet \"Common Sense\", was born into a Quaker family, and Quaker thought arguably influenced his writings and philosophies. Similarly, the American General Nathanael Greene was raised Quaker, and, as historian William C. Kashatus III states, \"wrestled with a fundamental ideological dilemma: 'Was it possible to balance an allegiance to the state without deviating from the principles of the Society of Friends?'\" Greene likely dealt with this internal conflict throughout his life, and after the war never completely returned to the Society of Friends.\n", "In 2013, Burbidge was one of many clerical leaders to show support for the Moral Mondays protests in North Carolina, a movement started by religious progressives encouraging civil disobedience and arguing for reforms to North Carolina laws regarding the environment, racial justice, gender equality, social programs, education, and other issues, by signing \"A Joint Statement by Episcopal, Lutheran, Presbyterian, Roman Catholic and United Methodist Leaders in North Carolina\", although he did not permit Catholic priests to join the protests.\n" ]
A couple questions about redshift and relativity.
I don't know if I follow your first scenario very well, but I will try my best to answer what I can. First off, there is no system which can "measure redshift." All you can do is measure the frequency. Now, there are times you can use that frequency and determine the amount of red shift if you know what frequencies of light you are looking at (for instance, find where the absorption lines are looking at the Sun, know that they are actually helium and hydrogen lines, and calculate). However, you can never directly measure red shift. Ok, so now to your question about heading towards a distant star. Yes, if you traveled fast enough, the light coming towards you would be blue shifted to the gamma range, and all of the negatives of gamma radiation would affect you unless you protected yourself from them. That also means that if you traveled at an object quickly enough, it could become invisible to you, unless it was emitting long enough wavelength (so a low heat perhaps?) that was blue-shifted to the visible spectrum. The reverse is also true, you could travel away from the Sun quickly enough so that its light would be red-shifted away from you and thus you could no longer see it.
[ "At the time of discovery and development of Hubble's law, it was acceptable to explain redshift phenomenon as a Doppler shift in the context of special relativity, and use the Doppler formula to associate redshift \"z\" with velocity. Today, in the context of general relativity, velocity between distant objects depends on the choice of coordinates used, and therefore, the redshift can be equally described as a Doppler shift or a cosmological shift (or gravitational) due to the expanding space, or some combination of the two.\n", "A special relativistic redshift formula (and its classical approximation) can be used to calculate the redshift of a nearby object when spacetime is flat. However, in many contexts, such as black holes and Big Bang cosmology, redshifts must be calculated using general relativity. Special relativistic, gravitational, and cosmological redshifts can be understood under the umbrella of frame transformation laws. There exist other physical processes that can lead to a shift in the frequency of electromagnetic radiation, including scattering and optical effects; however, the resulting changes are distinguishable from true redshift and are not generally referred to as such (see section on physical optics and radiative transfer).\n", "Note that redshift is also used to measure the expansion of space, but that this is not truly a Doppler effect. Rather, redshifting due to the expansion of space is known as cosmological redshift, which can be derived purely from the Robertson-Walker metric under the formalism of General Relativity. Having said this, it also happens that there \"are\" detectable Doppler effects on cosmological scales, which, if incorrectly interpreted as cosmological in origin, lead to the observation of redshift-space distortions.\n", "Popular literature often uses the expression \"Doppler redshift\" instead of \"cosmological redshift\" to describe the redshift of galaxies dominated by the expansion of spacetime, but the cosmological redshift is not found using the relativistic Doppler equation which is instead characterized by special relativity; thus is impossible while, in contrast, is possible for cosmological redshifts because the space which separates the objects (for example, a quasar from the Earth) can expand faster than the speed of light. More mathematically, the viewpoint that \"distant galaxies are receding\" and the viewpoint that \"the space between galaxies is expanding\" are related by changing coordinate systems. Expressing this precisely requires working with the mathematics of the Friedmann-Robertson-Walker metric.\n", "\"Doppler redshift vs cosmological red-shift\": Astronomers often refer to the cosmological red-shift as a Doppler shift which can lead to a misconception. Although similar, the cosmological red-shift is not identical to the classically derived Doppler redshift because most elementary derivations of the Doppler redshift do not accommodate the expansion of space. Accurate derivation of the cosmological redshift requires the use of general relativity, and while a treatment using simpler Doppler effect arguments gives nearly identical results for nearby galaxies, interpreting the redshift of more distant galaxies as due to the simplest Doppler redshift treatments can cause confusion.\n", "In general relativity one can derive several important special-case formulae for redshift in certain special spacetime geometries, as summarized in the following table. In all cases the magnitude of the shift (the value of ) is independent of the wavelength.\n", "The redshift \"z\" is often described as a \"redshift velocity\", which is the recessional velocity that would produce the same redshift \"if\" it were caused by a linear Doppler effect (which, however, is not the case, as the shift is caused in part by a cosmological expansion of space, and because the velocities involved are too large to use a non-relativistic formula for Doppler shift). This redshift velocity can easily exceed the speed of light. In other words, to determine the redshift velocity \"v\", the relation:\n" ]
how do you train messenger birds?
Messenger birds can't deliver messages to arbitrary locations. They're birds (generally pigeons) that have a homing instinct that helps them return to their roost over long distances. So you raise one at your location, release them from further and further away from their roost to help them learn the area, and then give them to people you want to be able to send you messages. Likewise, if you want to be able to send someone messages, you have to have one of their pigeons delivered to you.
[ "Birds use contact calls in flight to establish location and to keep aware of each other's presence while flying and feeding. For some species, this call consists of a short, high-pitched sound, recognized and duplicated exactly by mates. Some fowl, such as geese,\"honk\" while in migration to communicate location and proximity to others in their flock.\n", "Flight training a bird to be a reliable flyer requires expertise on the trainer's part. If the trainer is not dedicated to both positive reinforcement and negative punishment training, then problems will occur in the training. Birds may learn to fly away from the owner or new objects as a result of flooding. Trainers who do not rely exclusively on positive reinforcement and negative reinforcement training will often use harnesses on their birds because of the poor training techniques they apply such as; grabbing the bird when it does not want to train, snatching the bird out of flight, launching the bird off the hand, and dropping the hand to make a bird fly, all of which increase the fear response in a bird. Harnesses can be a great tool when used properly as a rarely used backup plan to keep the bird safe. But if the trainer heavily relies on a harness to keep the bird safe, then it is an obvious sign that the training methods used where not positive reinforcement and negative punishment. Trainers who use the harness too much often have problems controlling the bird in an outdoor environment and have problems with birds flying off and not coming back. This problem can be remedied by refining the person's training skills and by eliminating negative reinforcement and positive punishment from the training routine.\n", "Guiding is unpredictable and is more common among immatures and females than adult males. A guiding bird attracts a person's attention with wavering, chattering \"'tya' notes compounded with peeps or pipes\", sounds it also gives in aggression. The guiding bird flies toward an occupied nest (greater honeyguides know the sites of many bees' nests in their territories) and then stops and calls again. As in other situations, it spreads its tail, showing the white spots, and has a \"bounding, upward flight to a perch\", which make it conspicuous. If the followers are native honey-hunters, when they reach the nest they incapacitate the adult bees with smoke and open the nest with axes or \"pangas\" (machetes). After they take the honey, the honeyguide eats whatever is left.\n", "As a method of communication, it is likely as old as the ancient Persians from whom the art of training the birds probably came. The Romans used pigeon messengers to aid their military over 2000 years ago. Frontinus said that Julius Caesar used pigeons as messengers in his conquest of Gaul. The Greeks conveyed the names of the victors at the Olympic Games to their various cities by this means.\n", "The United States Army Pigeon Service ( Signal Pigeon Corps) was a unit of the United States Army during World War I and World War II. Their assignment was the training and usage of homing pigeons for communication and reconnaissance purposes.\n", "The messenger pigeon is a variety of domestic pigeon (\"Columba livia domestica\") derived from the rock pigeon, selectively bred for its ability to find its way home over extremely long distances. The wild rock pigeon has an innate homing ability, meaning that it will generally return to its nest, (it is believed) using magnetoreception. This made it relatively easy to breed from the birds that repeatedly found their way home over long distances. Flights as long as have been recorded by birds in competitive pigeon racing. Their average flying speed over moderate distances is around and speeds of up to have been observed in top racers for short distances.\n", "Communication through bird calls can be between individuals of the same species or even across species. Birds communicate alarm through vocalizations and movements that are specific to the threat, and bird alarms can be understood by other animal species, including other birds, in order to identify and protect against the specific threat. Mobbing calls are used to recruit individuals in an area where an owl or other predator may be present. These calls are characterized by wide-frequency spectra, sharp onset and termination, and repetitiveness that are common across species and are believed to be helpful to other potential \"mobbers\" by being easy to locate. The alarm calls of most species, on the other hand, are characteristically high-pitched, making the caller difficult to locate.\n" ]
why is it illegal to record a phone call without the person's consent?
You are mistaken. Michigan courts have said it is eavesdropping for anyone not a part of the conversation to record the call. Federal law requires only one party on the call know that it is being recorded. Back in the old days, there were multi-party phone lines, which made it cheaper for people living in rural areas to get phone service. It meant that many people 'shared' a single phone line. If you wanted to use the phone, you would need to check and make sure someone else wasn't already using it. You could also listen to a conversation taking place by quietly picking up any phone in the loop. That behavior was inconsiderate and rude to your neighbors, and made illegal to protect persons from gossip or blackmail. _URL_0_
[ "Call recording laws in some U.S. states require only one party to be aware of the recording, while other states require both parties to be aware. Several states require that all parties consent when one party wants to record a telephone conversation. Telephone scammers and others intentionally violating the federal Do Not Call list may try to locate in those states, or use their area codes. Many businesses and other organizations record their telephone calls so that they can prove what was said, train their staff, or monitor performance. This activity may not be considered telephone tapping in some, but not all, jurisdictions because it is done with the knowledge of at least one of the parties to the telephone conversation.\n", "According to the Swedish Penal Code (Brottsbalken) Chapter 4, 8–9 §§, it is illegal to make \"unauthorized\" recordings of telephone conversations. A court can grant permission for law enforcement agencies to tap telephone lines. Also, anyone participating in the telephone call may record the conversation — at least one party in the call must be aware of the recording being made. A recording is always admissible as evidence in a court, even if obtained in illegal matters.\n", "The telephone call recording laws in most U.S. states require only one party to be aware of the recording, while twelve states require both parties to be aware. In Nevada, the state legislature enacted a law making it legal for a party to record a conversation if one party to the conversation consented, but the Nevada Supreme Court issued two judicial opinions changing the law and requiring all parties to consent to the recording of a private conversation for it to be legal. It is considered better practice to announce at the beginning of a call that the conversation is being recorded.\n", "In the United States, the states have varying telephone call recording laws. In some states, it is legal to record a conversation with the consent of only one party, in others the consent of all parties is required.\n", "Federal law requires that at least one party taking part in the call must be notified of the recording (18 U.S.C. §2511(2)(d)). For example, it would be illegal to record, without notification, the phone calls of people who come into a place of business and ask to use the telephone. \n", "In Canada, telephone calls may be recorded without a court order if one of the parties to the call consents to the recording . It is to a judge's discretion as to whether or not to admit the recording into evidence if both parties are not aware of the conversation having been recorded. \n", "BULLET::::- In the state of Maryland, for example, it is illegal to record anybody's voice without their consent, but it is legal to record without the other party's consent if the non-consenting party does not have a reasonable expectation of privacy with respect to the conversation that is being recorded.\n" ]
Did Ancient Greece ever have sectarian conflicts? What were the major religious lines of division?
By Sectarian, I’m taking from your question that you mean religious and not territorial sectarian violence. Because the Greeks had a whole lot of territorial violence that could be defined as Sectarian. Religions could be used as a spark for a conflict but there wasn’t constant sectarian religious warfare like the Catholics/IRA v. England, Catholics v. Protestants, Muslim v. Christian,Muslim v. Hindu,etc... While we rattle off names like Zeus,Ares,Artemis,Hera,etc… the various city-states had their own interpretations of each usually. The Idea of Ares in Sparta would be different than the one in Athens or Argo. They’d also often have their own holidays/festivals/holy days. The Spartans were famously late for the Battle of Marathon because they had a religious observance(The Carnea festival honoring Apollo) and couldn’t march until it was completed. Athens didn’t wasn’t beholden to the Carnea so they marched to Marathon to meet the Persians. Also, cities and areas would have their own preferred gods like Athena and Athens, Helios for Rhodes,etc.. As to them fighting over their various interpretations, it was never a primary reason. It may have been thrown out as a secondary reason but the Greek City-States fought amongst themselves over the normal things: Land, Supplies,Money or Insults. I think a big reason for a lack of large-scale religious sectarian violence is that there were just so many different religions,cults, mystery cults,etc… floating around Greece. The island of Delos was a major port for trading so it came in contact with the levant, north Africa, Italy,etc… It had Greek religious temples, a temple to the Philistine god Baal and even a synagogue. It’d be real hard to fight solely from a religious sectarian view when your neighbors,family members,etc.. have different religions. It’d be exhausting.
[ "There is, however, no reason to suppose that there was a decline in the traditional religion. There is plenty of documentary evidence that the Greeks continued to worship the same gods with the same sacrifices, dedications, and festivals as in the classical period. New religions did appear in this period, but not to the exclusion of the local deities, and only a minority of Greeks were attracted to them.\n", "Greek religion and philosophy have experienced a number of revivals, firstly in the arts, humanities and spirituality of Renaissance Neoplatonism, which was certainly believed by many to have effects in the real world. During the period of time (14th - 17th centuries) when the literature and philosophy of the ancient Greeks gained widespread appreciation in Europe, this new popularity did not extend to ancient Greek religion, especially the original theist forms, and most new examinations of Greek philosophy were written within a solidly Christian context.\n", "In the religious sphere, this was a period of profound change. The spiritual revolution that took place, saw a waning of the old Greek religion, whose decline beginning in the 3rd century BC continued with the introduction of new religious movements from the East. The cults of deities like Isis and Mithra were introduced into the Greek world. Greek-speaking communities of the Hellenized East were instrumental in the spread of early Christianity in the 2nd and 3rd centuries, and Christianity's early leaders and writers (notably Saint Paul) were generally Greek-speaking, though none were from Greece. However, Greece itself had a tendency to cling to paganism and was not one of the influential centers of early Christianity: in fact, some ancient Greek religious practices remained in vogue until the end of the 4th century, with some areas such as the southeastern Peloponnese remaining pagan until well into the 10th century AD.\n", "Mainstream Greek religion appears to have developed out of Proto-Indo-European religion and although very little is known about the earliest periods there are suggestive hints that some local elements go back even further than the Bronze Age or Helladic period to the farmers of Neolithic Greece. There was also clearly cultural evolution from the Late Helladic Mycenaean religion of the Mycenaean civilization. Both the literary settings of some important myths and many important sanctuaries relate to locations that were important Helladic centres that had become otherwise unimportant by Greek times.\n", "Greek religion encompassed the collection of beliefs and rituals practiced in ancient Greece in the form of both popular public religion and cult practices. These different groups varied enough for it to be possible to speak of Greek religions or \"cults\" in the plural, though most of them shared similarities. Also, the Greek religion extended out of Greece and out to neighbouring islands.\n", "Lack of political unity within Greece resulted in frequent conflict between Greek states. The most devastating intra-Greek war was the Peloponnesian War (431–404 BC), won by Sparta and marking the demise of the Athenian Empire as the leading power in ancient Greece. Both Athens and Sparta were later overshadowed by Thebes and eventually Macedon, with the latter uniting most of the city-states of the Greek hinterland in the League of Corinth (also known as the \"Hellenic League\" or \"Greek League\") under the control of Phillip II. Despite this development, the Greek world remained largely fragmented and would not be united under a single power until the Roman years. Sparta did not join the League and actively fought against it, raising an army led by Agis III to secure the city-states of Crete for Persia.\n", "During the 1970s, some began to reject the influence of Hermeticism and other heavily syncretic forms of Greek religion in preference of practices reconstructing earlier or more original forms of Hellenic worship. Early reconstructionists of Hellenic religion tended to be individuals working alone, and early attempts to organize adherents into larger groups failed. The first successful attempt was made by the Supreme Council of Ethnikoi Hellenes (or YSEE). In 1993, a variety of adherents to the Hellenic religion in Greece and elsewhere came together and began the process of organization. This resulted in a \"Hellenic National Assembly\", initiated at a gathering in southern Olympus on the 9th of September 1995. The process culminated with the formal establishment of the YSEE as a non-profit in Greece, in June 1997. Twenty years later, the organization was given legal status as a \"known religion\", granting them permission to establish a formal place of worship by the Greek government.\n" ]
How did scientists figure out that the mantis shrimp can see 12 different wavelengths if humans can only see three?
They extracted the proteins from the retina of the Mantis Shrimp. We have three types of cone cells in our eyes that are activated when differing wavelengths of light hit them. The mantis shrimp is the same, except they found up to 12 different types of detectors; each for a slightly different wavelength. The real question is: with a visual cortex so small, can the Shrimp really perceive all the beauty he could see? Or is he limited by the small size and power of his brain and able to only really see one or two wavelengths at a time?
[ "Mantis shrimp can perceive wavelengths of light ranging from deep ultraviolet (UVB) to far-red (300 to 720 nm) and polarized light. In mantis shrimp in the superfamilies Gonodactyloidea, Lysiosquilloidea, and Hemisquilloidea, the midband is made up of six omatodial rows. Rows 1 to 4 process colours, while rows 5 and 6 detect circularly or linearly polarized light. Twelve types of photoreceptor cells are in rows 1 to 4, four of which detect ultraviolet light.\n", "Six species of mantis shrimp have been reported to be able to detect circularly polarized light, which has not been documented in any other animal, and whether it is present across all species is unknown. Some of their biological quarter-waveplates perform more uniformly over the visual spectrum than any current man-made polarising optics, and this could inspire new types of optical media that would outperform the current generation of Blu-ray Disc technology.\n", "The eyes for the mantis shrimp contain four different kinds of mycosporine-like amino acids as filters, which combined with two different visual pigments assist the eye to detect six different bands of ultraviolet light. Three of the filter MAAs are identified with porphyra-334, mycosporine-gly, and gadusol.\n", "The eyes of mantis shrimps may enable them to recognise different types of coral, prey species (which are often transparent or semitransparent), or predators, such as barracuda, which have shimmering scales. Alternatively, the manner in which they hunt (very rapid movements of the claws) may require very accurate ranging information, which would require accurate depth perception.\n", "The eyes of the mantis shrimp are mounted on mobile stalks and can move independently of each other. They are thought to have the most complex eyes in the animal kingdom and have the most complex visual system ever discovered. Compared to the three types of photoreceptor cells that humans possess in their eyes, the eyes of a mantis shrimp have between 12 and 16 types of photoreceptors cells. Furthermore, some of these shrimp can tune the sensitivity of their long-wavelength colour vision to adapt to their environment. This phenomenon, called \"spectral tuning\", is species-specific. Cheroske et al. did not observe spectral tuning in \"Neogonodactylus oerstedii\", the species with the most monotonous natural photic environment. In \"N. bredini\", a species with a variety of habitats ranging from a depth of 5 to 10 m (although it can be found down to 20 m below the surface), spectral tuning was observed, but the ability to alter wavelengths of maximum absorbance was not as pronounced as in \"N. wennerae\", a species with much higher ecological/photic habitat diversity.\n", "Different species are able to see different parts of the light spectrum; for example, bees can see into the ultraviolet, while pit vipers can accurately target prey with their pit organs, which are sensitive to infrared radiation. The mantis shrimp possesses arguably the most complex visual system in any species. The eye of the mantis shrimp holds 16 color receptive cones, whereas humans only have three. The variety of cones enables them to perceive an enhanced array of colors as a mechanism for mate selection, avoidance of predators, and detection of prey. Swordfish also possess an impressive visual system. The eye of a swordfish can generate heat to better cope with detecting their prey at depths of 2000 feet. Certain one-celled micro-organisms, the warnowiid dinoflagellates have eye-like ocelloids, with analogous structures for the lens and retina of the multi-cellular eye. The armored shell of the chiton \"Acanthopleura granulata\" is also covered with hundreds of aragonite crystalline eyes, named ocelli, which can form images.\n", "His study of the mantis shrimp revealed it has the world’s most complex visual system of any known animal, with 12-channel colour channels. His research also showed that octopus and other cephalopods are colour blind.\n" ]
can we pump greenhouse gases into space?
No. None of us have the money, very few of us have the technology. **Problem #1:** Sorting out the "bad gases" from the "good gases". It's easy to verify those gases are present, but difficult to collect amounts of just that gas from the atmosphere in any reasonable amount. Most production of greenhouse gases for industrial use is done by making that gas with a chemical reaction. **Problem #2:** Pumping them out of the atmosphere. To make any reasonable dent in global warming, modern estimates usually figure a few *million tons* of greenhouse gas need to go. In order to get them into space, you have to somehow transport all those millions of tons straight up. Pressure pumping alone won't work: you would need a pipe that goes straight up out of the atmosphere. Google the space elevator problem for why this is problematic. **Problem #3:** You gotta keep all of it up there. Figuring out where to put all that gas would be difficult enough: you can't keep it in orbit, because it would pose a serious risk to spacecraft. That means that you are already transporting/piping this gas some 384000 km away. So tl;dr: No we can't, it's way too hard to do. EDIT: Some formatting
[ "Because long-term climate stability would be required for sustaining a human population, the use of especially powerful fluorine-bearing greenhouse gases, possibly including sulfur hexafluoride or halocarbons such as chlorofluorocarbons (or CFCs) and perfluorocarbons (or PFCs), has been suggested. These gases are proposed for introduction because they produce a greenhouse effect many times stronger than that of . This can conceivably be done by sending rockets with payloads of compressed CFCs on collision courses with Mars. When the rockets crash onto the surface they would release their payloads into the atmosphere. A steady barrage of these \"CFC rockets\" would need to be sustained for a little over a decade while Mars changes chemically and becomes warmer. However, their lifetime due to photolysis would require an annual replenishing of 170 kilotons, and they would destroy any ozone layer.\n", "Observations by future telescopes, such as the \"James Webb Space Telescope\" or European Extremely Large Telescope, will be able to assess the greenhouse gas content of the atmospheres, allowing better estimation of surface conditions. They may also be able to detect biosignatures like ozone or methane in the atmospheres of these planets, if life is present there.\n", "The Greenhouse Gases Observing Satellite (GOSat), also known as , is an Earth observation satellite and the world's first satellite dedicated to greenhouse-gas-monitoring. It measures the densities of carbon dioxide and methane from 56,000 locations on the Earth's atmosphere. The GOSAT was developed by the Japan Aerospace Exploration Agency (JAXA) and launched on 23 January 2009, from the Tanegashima Space Center. Japan's Ministry of the Environment, and the National Institute for Environmental Studies (NIES) use the data to track gases causing the greenhouse effect, and share the data with NASA and other international scientific organizations.\n", "Despite of the high concentration of CO in the Martian atmosphere, the greenhouse effect is relatively weak on Mars (about 5 °C) because of the low concentration of water vapor and low atmospheric pressure. While water vapor in Earth's atmosphere has the largest contribution to greenhouse effect on modern Earth, it is present in only very low concentration in the Martian atmosphere. Moreover, under low atmospheric pressure, greenhouse gases cannot absorb infrared radiation effectively because the pressure-broadening effect is weak.\n", "The major atmospheric gases (oxygen and nitrogen) are transparent to incoming sunlight but are also transparent to outgoing thermal (infrared) radiation. However, water vapor, carbon dioxide, methane and other trace gases are opaque to many wavelengths of thermal radiation. The Earth's surface radiates the net equivalent of 17 percent of the incoming solar energy in the form of thermal infrared. However, the amount that directly escapes to space is only about 12 percent of incoming solar energy. The remaining fraction, 5 to 6 percent, is absorbed by the atmosphere by greenhouse gas molecules.\n", "Klinkman and Wilkes proposed, at the AIAA Space 2007 and Space 2009 conferences, that gases could be harvested at the very edge of the earth's atmosphere by a high vacuum pump. An ion propulsion engine would consume a portion of the harvested gases and would restore the spacecraft's orbital momentum. Klinkman's proposal has a fairly low energy threshold for a small-scale harvesting operation, and air friction is far more forgiving at 200 km than at 100 km.\n", "A greenhouse gas (sometimes abbreviated GHG) is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about , rather than the present average of . The atmospheres of Venus, Mars and Titan also contain greenhouse gases.\n" ]
If you're breed into a war driven society like the Spartans, Mongols, Romans, etc. Is it a highly likely chance the soldiers still experience PTSD.
Insofar as PTSD is the result of neurological changes due to overexposure to traumatic situations, there is no reason why conditioning and training should make anyone less susceptible to it. Arguably the training itself, depending on the methods used, could become a cause of PTSD in itself. In any case, I'm not sure to what extent the societies you mention were "war driven". Recent work by Stephen Hodkinson has shown that Sparta, for one, was not a militaristic society at all. It did not even have a military. Its social conditioning was focused on fostering obedience and endurance, and the outward features of its culture were intended to minimise and hide differences of wealth and status within the citizen body. The purpose of this entire system was not to create perfect soldiers, but to create a perfectly stable society, in which neither the destitution of the common people nor the rivalries of the elite would lead to an overthrow of the established political and legal institutions, as it did everywhere else in Greece on a regular basis. Sparta was not a military powerhouse but an elaborate and remarkably successful experiment in social engineering. The Roman approach to warfare became more organised and disciplined during the mid-Republic, but I doubt the average Roman citizen would regard himself as bred for war. Most of them were farmers and labourers who were called to arms only at need. The rise of the professional army went hand in hand with the release of ordinary citizens from military duties, allowing them to focus entirely on their normal everyday activities as war became the business of those who chose a career in it.
[ "Since the \"Machel Report\" further research has shown that child recruits who survive armed conflict face a markedly elevated risk of debilitating psychiatric illness, poor literacy and numeracy, and behavioural problems. Research in Palestine and Uganda, for example, has found that more than half of former child soldiers showed symptoms of post-traumatic stress disorder and nearly nine in ten in Uganda screened positive for depressed mood. Researchers in Palestine also found that children exposed to high levels of violence in armed conflict were substantially more likely than other children to exhibit aggression and anti-social behaviour. The combined impact of these effects typically includes a high risk of poverty and lasting unemployment in adulthood.\n", "Child recruits who survive armed conflict frequently suffer psychiatric illness, poor literacy and numeracy, and behavioural problems such as heightened aggression, leading to a high risk of poverty and unemployment in adulthood. Research in the UK and US has also found that the enlistment of adolescent children, even when they are not sent to war, is accompanied by a higher risk of attempted suicide, stress-related mental disorders, alcohol misuse, and violent behaviour.\n", "The Spartan society desired that all male citizens become successful soldiers with the stamina and skills to defend their polis as members of a Spartan phalanx. There is a misconception that Spartans killed weak children, but that is not true. It was a rumor started by Plutarch, a Greek historian, who evidently got his history wrong. After examination, the council would either rule that the child was fit to live or would reject the child sentencing him to a death by abandonment and exposure.\n", "About one quarter of the soldiers serving in the government armed forces during the civil war were under age 18. \"Recruitment methods were brutal – sometimes children were abducted, sometimes they were forced to kill members of their own families so as to make them outcasts, sometimes they were drugged, sometimes they were forced into conscription by threatening family members.\" Child soldiers were deliberately overwhelmed with violence \"in order to completely desensitize them and make them mindless killing machines\". \n", "There is a higher proportion of mental illnesses such as anxiety and post traumatic stress disorder (PTSD) for Nepali child soldiers than for Nepali children who were never conscripted. This is especially true for female child soldiers as found in a study about the mental health of conscripted child soldiers by Kohrt (2008). Female child soldiers also experienced gender-based stigma from their community after their work in the military. One year after the war 55% of the child soldiers participating in the study were found to have PTSD.\n", "Armed groups, including Mai Mai, continued to abduct and forcibly recruit children to serve as forced laborers, porters, combatants, war wives, and sex slaves. Credible estimates of the total number of children associated with armed groups, many of whom were between the ages of 14 and 16, varied widely from 15,000 to 30,000 in 2005. Credible sources estimated that at least 3,000 child soldiers had not yet been demobilized countrywide by year's end.\n", "However, there are still child soldiers that join armed groups of their own volition. Children in countries led into poverty resort to joining warring groups that provide materials they would no otherwise have, such as three meals a day, clean clothes, and medical care. In a 2004 study of children in military organizations around the world, Rachel Brett and Irma Specht pointed to a complex of factors that incentivize joining an armed group, particularly:\n" ]
dry shampoo
Dry shampoo is basically a powder that absorbs hair oils. No, it's not just laziness. Washing hair every day can be bad for your scalp (not only does it remove oil, as you mentioned, but shampoo ingredients can be incredibly harsh. Styling hair can also be incredibly damaging. If your hair gets wet, it needs to be restyled. For all of these reasons, people may want to extend the time between shampoo washes. Doesn't mean they aren't showering). For people with thicker hair, washing and letting your hair air dry can mean you have a wet head for *hours*. If I shower before bed, I wake up with still damp hair. If I braid it, it could be wet for over a day. And my hair isn't particularly long or thick. Someone with longer, thicker hair might need to wash their hair less often or else they will just *always* have wet hair. Which is awful. The other reason people use dry shampoo is because they want the texture that it gives hair. It might make their hair look fuller, more voluminous, or help hold certain styles better. Dirtier hair in general is seen as easier to style and dry shampoo can be a way for people to get the styling ease in still-clean hair. Also, some people like the smell. There are also dry conditioners for people who don't have greasy hair. They're basically anti static/frizz ingredients combined with dry conditioners to add shine and smooth flyaways.
[ "Shampoo () is a hair care product, typically in the form of a viscous liquid, that is used for cleaning hair. Less commonly, shampoo is available in bar form, like a bar of soap. Shampoo is used by applying it to wet hair, massaging the product into the hair, and then rinsing it out. Some users may follow a shampooing with the use of hair conditioner.\n", "Dry shampoo is a type of shampoo which reduces hair greasiness without the need for water. It is in powder form and is typically administered from an aerosol can. Dry shampoo is often based on corn starch or rice starch. In addition to cleansing hair, it can also be used as a tool for hair-styling as it can create volume, help tease hair, keep bobby pins in place, and be used in place of mousse in wet hair. Dry shampoo proponents attest that daily wash-and-rinse with detergent shampoo can strip away natural oils from hair. However, others attest that spraying dry shampoo every day will lead to a build-up of product that can dull hair color and irritate the scalp, arguing that the scalp needs regular cleansing and exfoliating to get rid of bacteria, remove dead skin cells, and stay healthy.\n", "One reason is concern about the effect of ingredients typically found in commercial hair care products. Shampoo typically contains chemical additives such as sodium lauryl sulfate and sodium laureth sulfate, which can irritate sensitive skin or if not thoroughly rinsed. Such chemical additives are also believed by some consumers to dry out their hair. The Environmental Working Group (EWG) compared the ingredients in 42,000 personal care products against 50 toxicity and regulatory databases and found that most shampoos have at least one chemical that \"raises concern\" (although the hair care industry counters by claiming that the chemicals are safe in the concentrations used). The group flagged the following groups of ingredients as hazardous: fragrances, due to containing unknown constituents, parabens, possibly linked to endocrine disruption and neurotoxicity, DMDM hydantoin, due to possible allergy concerns, and 1,4-dioxane, which the Environmental Protection Agency has labelled as a probable human carcinogen. Some disagree with the EWG’s assessments while others think they aren’t strong enough. \n", "The product is a shampoo first produced in 1971 by two Los Angeles-based hairstylists who were concerned about the harm they feared traditional shampoos might cause to hair and who created the formula in a garage.\n", "This product has also been made at home, in addition to being purchased in stores. DIY dry shampoos usually have some sort of starch base, which is one of the key products in commercially produced dry shampoos, and often contains essential oils for scent.\n", "The word \"shampoo\" entered the English language from the Indian subcontinent during the colonial era. It dates to 1762 and is derived from Hindi \"chāmpo\" (चाँपो ), itself derived from the Sanskrit root \"chapati\" (चपति), which means to press, knead, soothe.\n", "Wet shampoo cleaning with rotary machines, followed by thorough wet vacuuming, was widespread until about the 1970s, but industry perception of shampoo cleaning changed with the advent of encapsulation. Hot-water extraction, also regarded as preferable by all manufacturers, had not been introduced either. Wet shampoos were once formulated from coconut oil soaps; wet shampoo residues can be foamy or sticky, and steam cleaning often reveals dirt unextracted by shampoos. Since no rinse is performed, the powerful residue can continue to collect dirt after cleaning, leading to the misconception that carpet cleaning can lead to the carpet getting \"dirtier faster\" after the cleaning. The best method is truckmounted hot water extraction.\n" ]
Why is belly fat different from other fat?
abdominal fat is more correlated with insulin resistance. We don't know if the belly fat causes insulin resistance or if insulin resistance makes you more likely to store belly fat. _URL_0_
[ "Visceral fat or abdominal fat (also known as organ fat or intra-abdominal fat) is located inside the abdominal cavity, packed between the organs (stomach, liver, intestines, kidneys, etc.). Visceral fat is different from subcutaneous fat underneath the skin, and intramuscular fat interspersed in skeletal muscles. Fat in the lower body, as in thighs and buttocks, is subcutaneous and is not consistently spaced tissue, whereas fat in the abdomen is mostly visceral and semi-fluid. Visceral fat is composed of several adipose depots, including mesenteric, epididymal white adipose tissue (EWAT), and perirenal depots. Visceral fat is often expressed in terms of its area in cm (VFA, visceral fat area).\n", "Men are more likely to have fat stored in the abdomen due to sex hormone differences. Female sex hormone causes fat to be stored in the buttocks, thighs, and hips in women. When women reach menopause and the estrogen produced by the ovaries declines, fat migrates from the buttocks, hips and thighs to the waist; later fat is stored in the abdomen.\n", "Abdominal fat is a marker of visceral fat (stored around important internal organs such as the liver, pancreas and intestines) and has greater blood flow and more receptors for cortisol than peripheral fat. The greater the number of cortisol receptors, the more sensitive the visceral fat tissue is to cortisol. This heightened sensitivity to cortisol stimulates fat cells to further increase in size.\n", "Visceral fat, also known as organ fat or \"intra-abdominal fat\", is located inside the peritoneal cavity, packed in between internal organs and torso, as opposed to subcutaneous fat, which is found underneath the skin, and intramuscular fat, which is found interspersed in skeletal muscle. Visceral fat is composed of several adipose depots including mesenteric, epididymal white adipose tissue (EWAT) and perirenal fat. An excess of visceral fat is known as central obesity, the \"pot belly\" or \"beer belly\" effect, in which the abdomen protrudes excessively. This body type is also known as \"apple shaped\", as opposed to \"pear shaped\", in which fat is deposited on the hips and buttocks.\n", "Body fat percentage recommendations are higher for females, as this fat may serve as an energy reserve for pregnancy. Males have less subcutaneous fat in their faces due to the effects of testosterone; testosterone also reduces fat by aiding fast metabolism. The lack of estrogen in males generally results in more fat being deposited around the waist and abdomen (producing an \"apple shape\").\n", "Estrogen causes fat to be stored in the buttocks, thighs, and hips in women. When women reach menopause and the estrogen produced by ovaries declines, fat migrates from their buttocks, hips and thighs to their waists. Later fat is stored in the belly. Thus females generally have relatively narrow waists and large buttocks, and this along with wide hips make for a wider hip section and a lower waist-hip ratio compared to men. Hormonal and genetic factors may produce male-like distribution of fat in women i.e. around the belly instead of buttocks and thighs.\n", "Estrogen increases fat storage in the body, which results in more fat stored in the female body. Body fat percentage recommendations are higher for females, as this may serve as an energy reserve for pregnancy. Males have less subcutaneous fat in their faces due to the effects of testosterone; testosterone also reduces fat by aiding fast metabolism. Males generally deposit fat around waists and abdomens (producing an \"apple shape\") due to the lack of estrogen.\n" ]
Is it possible that Earth has had moons in the past and they were destroyed?
Not only is it possible, but there is actually evidence suggesting the Earth did in fact used to have two moons: _URL_0_
[ "Claims of the existence of other moons of Earth—that is, of one or more natural satellites that orbit Earth, other than the Moon (Luna)—have existed for some time. Several candidates have been proposed, but none has been confirmed. Since the 19th century, scientists have made genuine searches for more moons, but the possibility has also been the subject of a number of dubious non-scientific speculations as well as a number of likely hoaxes.\n", "It was also claimed that the Earth had had several satellites before it acquired the Moon; they began as planets in orbits of their own, but over long spans of time were captured one by one and slowly spiralled in towards the Earth until it disintegrated and its debris became part of the Earth's structure. One can supposedly identify the rock strata of several geological eras with the impacts of these satellites.\n", "Some theories have been stated that presume the proto-Earth had no large moons early in the formation of the Solar System, 4.6 billion years ago, Earth being basically rock and lava. Theia, an early protoplanet the size of Mars, hit Earth in such a way that it ejected a considerable amount of material away from Earth. Some proportion of these ejecta escaped into space, but the rest consolidated into a single spherical body in orbit about Earth, creating the Moon.\n", "The Moon has an outer shell of low-density crystalline rock that is a few hundred kilometers thick, which formed due to a rapid creation. The craters of the Moon have been well preserved through time and were once thought to have been the result of extreme volcanic activity, but actually were formed by meteorites, nearly all of which took place in the first few hundred million years after the Moon formed. Around 500 million years afterward, the Moon's mantle was able to be extensively melted due to the decay of radioactive elements. Massive basaltic eruptions took place generally at the base of large impact craters. Also, eruptions may have taken place due to a magma reservoir at the base of the crust. This forms a dome, possibly the same morphology of a shield volcano where calderas universally are known to form. Although caldera-like structures are rare on the Moon, they are not completely absent. The Compton-Belkovich Volcanic Complex on the far side of the Moon is thought to be a caldera, possibly an ash-flow caldera.\n", "What if the Moon Didn’t Exist is a collection of speculative articles about different versions of Earth, published in book form in 1993. They were originally published in \"Astronomy\" magazine. The individual scenarios are:\n", "Modern theories also suggest that Earth's anomalously large moon was formed catastrophically. In a paper published in \"Icarus\" in 1975, William K. Hartmann and Donald R. Davis proposed that a catastrophic near-miss by a large planetesimal early in Earth's formation approximately 4.5 billion years ago blew out rocky debris, remelted Earth and formed the Moon, thus explaining the Moon's lesser density and lack of an iron core. The impact theory does have some faults; some computer simulations show the formation of a ring or multiple moons post impact, and elements are not quite the same between the earth and moon.\n", "However, there were two anomalies. First, the largest of the planet's four moons featured a giant cube of stone, which was damaged and scorched just like the Monuments at Quraqua and Nok. Second, they discovered an artificial space station in orbit around the world. They immediately set out to investigate.\n" ]
Power Transformer explosions in Ft. Worth, TX. What could cause this?
I actually just saw a lecture about this. The explosions are caused when the oil used as a coolant ignites. The thing has to fail prior to this happening, for instance by a component melting.
[ "However, Con Edison later said that the power failure originated at a substation on West 49th Street. Gov. Cuomo further specified that an explosion and resulting fire at the substation caused damage to other substations. New York Mayor Bill de Blasio initially said via Twitter that a \"manhole fire\" was the cause, though he later stated that the outage was due to a transformer fire, and that no foul play was suspected.\n", "The blast at the , Siemens combined cycle gas and oil-fired power plant occurred at 11:17 am, and was reported at 11:25 am EST. The plant's manager, Gordon Holk, said that contractors and other workers from O & G Industries, Ducci Electric, and Keystone Construction and Maintenance Services were at the site when the blast occurred. The explosion occurred at the rear of the largest building, the turbine hall, which was destroyed. Some residents reported \"earthquake-like tremors\" from at least away, although the blast proved not to be seismically detectable. Another resident of the area felt that it was more like a sonic boom.\n", "At the Bureau of Power and Light at both Receiving Stations in Los Angeles and the Water Works and Supply at Powerhouse there was a sharp voltage drop at Simultaneously, a transformer at Southern California Edison's Saugus substation exploded, a situation investigators later determined was caused by wires up the western hillside of San Francisquito canyon about ninety feet above the dam's east abutment shorting.\n", "At 09:15 on February 14, 2007, a passenger train of West Rail SP1900 (D305/306) broke down when one of the transformers (numbered P306) mounted on the train roof exploded. It is suspected that the overheated transformer caused its insulating oil to vaporise, thus causing the explosion. In addition, the circuit breaker of the transformer apparently failed to cut the power supply to the transformer.\n", "BULLET::::- On at about 03:00, a fire erupted at the power station complex, damaging the main switchboard for the plant's power generation machinery. Power generation was ceased, but did not trigger any blackouts due to alternative sources being available at the time. Six employees of the power station who inhaled noxious fumes as a result of the fire were hospitalized.\n", "The explosion that severely damaged the power station was heard up to away and is believed to have involved at least 2,000 tonnes of munitions. With the exception of the gas turbine, all other generators were damaged and remained offline for more than one year.\n", "Initial reports suggested that a power surge on the Underground power grid had caused explosions in power circuits. This was later ruled out by power suppliers National Grid. Commentators suggested that the explanation had been made because of bomb damage to power lines along the tracks; the rapid series of power failures caused by the explosions (or power being ended by means of switches at the locations to permit evacuation) looked similar, from the point of view of a control room operator, to a cascading series of circuit breaker operations that would result from a major power surge. A couple of hours after the bombings, Home Secretary Charles Clarke confirmed the incidents were terrorist attacks.\n" ]
Have we ever found a species which does no fit into the genetic "tree of life"?
The short answer to this is no. All living things (I am excluding viruses from this discussion) are composed of cells surrounded by a membrane. They also all use DNA to store the instructions necessary to create proteins. Given these similarities, scientists have concluded that all life on Earth shares a common ancestor. It is important to note that this does not preclude the possibility that life *originated* elsewhere however. Since all life must perform many of the same functions (DNA replication, protein synthesis, metabolism), there is a subset of genes that all currently known living organisms possess. One of the most well-described of these genes is is the ribosomal RNA (or rRNA) gene. Similarities in this gene are used to determine the "relatedness" of two species since parts of it are not under selective pressure and can mutate at a (somewhat) predictable rate.
[ "When an analysis of real biological data is performed, there is generally no access to the sequences of ancestral species, only to the present-day species. However, when a model is time-reversible, which species was the ancestral species is irrelevant. Instead, the phylogenetic tree can be rooted using any of the species, re-rooted later based on new knowledge, or left unrooted. This is because there is no 'special' species, all species will eventually derive from one another with the same probability.\n", "Another important piece of evidence is from detailed phylogenetic trees (i.e., \"genealogic trees\" of species) mapping out the proposed divisions and common ancestors of all living species. In 2010, Douglas L. Theobald published a statistical analysis of available genetic data, mapping them to phylogenetic trees, that gave \"strong quantitative support, by a formal test, for the unity of life.\"\n", "'The All-Species Living Tree' Project is a collaboration between various academic groups/institutes, such as ARB, SILVA rRNA database project, and LPSN, with the aim of assembling a database of 16S rRNA sequences of all validly published species of \"Bacteria\" and \"Archaea\". At one stage, 23S sequences were also collected, but this has since stopped.\n", "According to Ford Doolittle, an evolutionary and molecular biologist: “Molecular phylogeneticists will have failed to find the “true tree,” not because their methods are inadequate or because they have chosen the wrong genes, but because the history of life cannot properly be represented as a tree”.\n", "By comparing the parts of the genome that are not under natural selection and which therefore accumulate mutations at a fairly steady rate, it is possible to reconstruct a genetic tree incorporating the entire human species since the last shared ancestor. Each time a certain mutation (SNP) appears in an individual and is passed on to his or her descendants, a haplogroup is formed including all of the descendants of the individual who will also carry that mutation. By comparing mitochondrial DNA, which is inherited only from the mother, geneticists have concluded that the last female common ancestor whose genetic marker is found in all modern humans, the so-called mitochondrial Eve, must have lived around 90,000 to 200,000 years ago.\n", "Fewer than a hundred trees are known to be growing wild, in three localities not far apart. It is very difficult to count individuals, as most trees are multistemmed and may have a connected root system. Genetic testing has revealed that all the specimens are genetically indistinguishable, suggesting that the species has been through a genetic bottleneck in which its population became so low (possibly just one or two individuals) that all genetic variability was lost.\n", "Phylogenetic studies strongly suggest that PVs normally evolve together with their mammalian and bird host species, do not change host species, do not recombine, and have maintained their basic genomic organization for a period exceeding 100 million years. These sequence comparisons have laid the foundation for a PV taxonomy, which is now officially recognized by the International Committee on Taxonomy of Viruses. All PVs form the family \"Papillomaviridae\", which is distinct from the \"Polyomaviridae\" thus eliminating the term \"Papovaviridae\". Major branches of the phylogenetic tree of PVs are considered genera, which are identified by Greek letters. Minor branches are considered species and unite PV types that are genomically distinct without exhibiting known biological differences. This new taxonomic system does not affect the traditional identification and characterization of PV \"types\" and their independent isolates with minor genomic differences, referred to as \"subtypes\" and \"variants\", all of which are taxa below the level of \"species\". \n" ]
Does global warming on Earth affect the solar system at all?
The Earth is part of the solar system. Apart from that there is no relevant effect. The emission spectrum of the Earth shifts a tiny bit towards shorter wavelengths but that doesn't matter outside of Earth.
[ "BULLET::::- A NASA study reports that changes in solar activity cannot be responsible for the current period of global warming. The sun's total solar irradiance has in recent years dipped to the lowest levels recorded during the satellite era. (ScienceDaily)\n", "Scientists opposing the mainstream scientific assessment of global warming express varied opinions concerning the cause of global warming. Some say only that it has not yet been ascertained whether humans are the primary cause of global warming; others attribute global warming to natural variation; ocean currents; increased solar activity or cosmic rays. The consensus position is that solar radiation may have increased by 0.12 W/m since 1750, compared to 1.6 W/m for the net anthropogenic forcing. The TAR said, \"The combined change in radiative forcing of the two major natural factors (solar variation and volcanic aerosols) is estimated to be negative for the past two, and possibly the past four, decades.\" The AR4 makes no direct assertions on the recent role of solar forcing, but the previous statement is consistent with the AR4's figure 4.\n", "There are various solar/celestial effects that exist which have an effect on Earth's climate. These effects usually occur in cycles, and primarily include how Earth's obliquity, the eccentricity of Earth's orbit, and the precession of the equinoxes and solstices affect Earth's climate. In addition to these effects, there are also other factors that have an effect on Earth's climate. These other factors include how sun activity affects climate and how celestial phenomena, such as meteors, affect Earth's climate. Some of these factors aren't yet well understood, for instance the ice ages occur on 100,000 year cycles, and it's not completely understood why the various effects with this periodicity have such a strong effect on glaciation (see the 100,000-year problem).\n", "The Earth's Climate is constantly changing throughout the existence of the planet earth. In the last years, human activities including air pollution and water pollution have introduced a new area of climate change, global warming. \"The current warming trend is of particular significance because most of it is very likely human-induced and proceeding at a rate that is unprecedented in the past 1,300 years.\" In other words, today's climate change differs from the normal climate development through its induction by human activities. The global warming of over 2 °C would begin to seriously threaten global living.\n", "The role of the sun in recent climate change has been looked at by climate scientists. Since 1978, output from the Sun has been measured by satellites significantly more accurately than was previously possible from the surface. These measurements indicate that the Sun's total solar irradiance has not increased since 1978, so the warming during the past 30 years cannot be directly attributed to an increase in total solar energy reaching the Earth (see graph above, left). In the three decades since 1978, the combination of solar and volcanic activity probably had a slight cooling influence on the climate.\n", "The current scientific consensus, most specifically that of the IPCC, is that solar variations only play a marginal role in driving global climate change, since the measured magnitude of recent solar variation is much smaller than the forcing due to greenhouse gases. Also, solar activity in the 2010s was not higher than in the 1950s (see above), whereas global warming had risen markedly. Otherwise, the level of understanding of solar impacts on weather is low.\n", "As the Sun is Earth's primary energy source, changes in incoming sunlight directly affect the climate system. Solar irradiance has been measured directly by satellites and indirect measurements are available beginning in the early 1600s. There has been no upward trend in the amount of the Sun's energy reaching the Earth, so it cannot be responsible for the current warming. Physical climate models are also unable to reproduce the rapid warming observed in recent decades when taking into account only variations in solar output and volcanic activity.\n" ]
why won't flies and other insects react on sudden movements on the tv or computer monitors?
I'm not sure about this, but I think flies and other insects move because of air moving around. As screens don't make air move, they ignore it. Kind of relevant: _URL_0_
[ "Insect eyes are unable to move independently of the head. In order for flies to stabilize their visual fields, they must adjust the position of their entire head. Sensory inputs detected by halteres not only determine the position of the body, but also, the position of the head, which can move independently from the body. Halteres are particularly useful for detecting fast perturbations during flight and only respond to angular velocities (speeds of rotation) above a certain threshold. When flies are focused on an object in front of them and their body is rotated, they are able to maintain their head position so that the object remains focused and upright. Hengstenberg (1988) found that in the roll direction of rotation, the flies' ability to maintain their head position in response to body motion was only observed at speeds above 50 degrees per second and their ability peaked at 1500 degrees per second. When halteres were removed at the bulb (to retain intact sensory organs at the base) the fly's ability to perceive roll movements at high angular velocities disappeared.\n", "Neurons sensitive to motion during flight are not specific to flies, and have been found in numerous nondipterous insect groups including Odonata, Lepidoptera, and Hymenoptera. As in flies, these neurons receive input from both eyes and are sensitive to optic flow rotations corresponding to movement of the flying insect’s body, suggesting motion sensitive neurons are an essential component of optomotor responses throughout the insect kingdom.\n", "This fast response has led to suggestions that the ocelli of insects are used mainly in flight, because they can be used to detect sudden changes in which way is up (because light, especially UV light which is absorbed by vegetation, usually comes from above).\n", "Halteres and vision both play a role in stabilizing the head. Flies are also able to perform compensatory head movements to stabilize their vision without the use of their halteres. When the visual field is artificially rotated around a fly at slower angular velocities, head stabilization still occurs. Head stabilization outputs due to optical inputs alone are slower to respond, but also last longer than those due to haltere inputs. From this result it can be concluded that although halteres are required for detecting fast rotations, the visual system is adept by itself at sensing and correcting for slower body movements. Thus, the visual and mechanosensory (halteres) systems work together to stabilize the visual field of the animal: first, by quickly responding to fast changes (halteres), and second, by maintaining that response until it is corrected (vision).\n", "Fed up with Bugs' flying, Sam orders Bugs to turn the controls over to him. Instead, Bugs breaks off the control column and tosses it out of the plane, causing the aircraft to descend. Afraid of crashing, Sam activates the robot pilot. The pilot comes out, assesses the situation, concludes it is hopeless, takes one of the two parachutes from the parachute locker, and jumps out of the plane itself.\n", "In 2010 the Australian Civil Aviation Safety Authority (CASA) issued a warning to pilots about the potential dangers of flying through a locust swarm. CASA warned that the insects could cause loss of engine power and loss of visibility, and blocking of an aircraft's pitot tubes, causing inaccurate airspeed readings.\n", "Insects make use of two classes of pheromone signals; the pheromones that induce immediate or releaser effects (for example, aggression or mating behaviours) and those that elicit long-lasting or ‘primer’ effects, such as physiological and hormonal changes.\n" ]
why do wireless headphones produce a less quality sound than wired ones?
Well to ELI5 (im sure someone will add a better technical information).....blue tooth technology used for wireless headphones simply transmits less information than wires. An analogy would be similar to comparing mp3 to cd quality audio.....mp3 simply has less of the information about the audio than CD which means something, somewhere is lost.....
[ "Headphones are made in a range of different audio reproduction quality capabilities. Headsets designed for telephone use typically cannot reproduce sound with the high fidelity of expensive units designed for music listening by audiophiles. Headphones that use cables typically have either a 1/4 inch (6.35mm) or 1/8 inch (3.5mm) phone jack for plugging the headphones into the audio source. Some stereo earbuds are wireless, using Bluetooth connectivity to transmit the audio signal by radio waves from source devices like cellphones and digital players. Due to the spread of wireless devices in recent years headphones are increasingly used by people in public places such as sidewalks, grocery stores, and public transit. Headphones are also used by people in various professional contexts, such as audio engineers mixing sound for live concerts or sound recordings and DJs, who use headphones to cue up the next song without the audience hearing, aircraft pilots and call center employees. The latter two types of employees use headphones with an integrated microphone.\n", "Headphones are regularly used by audiophiles. These products can be remarkably expensive, some over $10,000, but in general are much cheaper than comparable speaker systems. They have the advantage of not requiring room treatment, and being usable without requiring others to listen at the same time. Newer canalphones can be driven by the less powerful outputs found on portable music players.\n", "Historically, many headphones had relatively high impedance, often over 500 ohms so they could operate well with high-impedance tube amplifiers. In contrast, modern transistor amplifiers can have very low output impedance, enabling lower-impedance headphones. Unfortunately, this means that older audio amplifiers or stereos often produce poor-quality output on some modern, low-impedance headphones. In this case, an external headphone amplifier may be beneficial.\n", "Wireless speakers receive considerable criticism from high-end audiophiles because of the potential for RF interference with other signal sources, like cordless phones, as well as for the relatively low sound quality some models deliver. Despite the criticism, wireless speakers have gained popularity with consumers and a growing number of models are actively marketed. Specifically, small and portable wireless Bluetooth speaker models have become very popular with consumers.\n", "Ideal listening conditions will most likely be experienced with headphones designed and calibrated to give an as flat frequency response as possible in order to reduce colouration of the audio the user is listening to. In most circumstances this has not seemed enough of a problem for end-users to make an investment into headphones that will allow them to hear audio exactly how the creator of the content intended, and will instead continue to use bundled headphones, or in some cases make investments into headphones endorsed and branded by certain artists. As previously discussed, there are issues of timbral effects present while using BRIR and HRTF data to create spatially improved audio, techniques used by Chris Pike and BBC R&D. The results experienced timbral issues and therefore this method may not yet be a successful way of creating spatially enhanced audio for headphones, but these timbral issues are also experienced with headphone choice. \"[Are timbral issues brought about by the use of BRIR and HRFT data] any worse than the difference between some cheap headphones that you get with an mp3 player versus some nice Sennhesiers\".\n", "Crystal earpieces are usually monaural devices with very low sound fidelity, but high sensitivity and impedance. Their peak use was probably with 1960s era transistor radios and hearing aids. They are not used with modern portable media players due to unacceptable sound quality. The main causes of poor performance with these earpieces are low diaphragm excursion, nonlinearity, in-band resonance and the very short horn shape of the earpiece casing. The resulting sound is very tinny and lacking in bass. Modern headphones use electromagnetic drivers that work similarly to speakers, with moving coils or moving iron cores in a magnetic field.\n", "Consumer headphone amplifiers are commercially available separate devices, sold to a niche audiophile market of hi-fi enthusiasts. These devices allow for higher possible volumes and superior current capacity compared to the smaller, less expensive headphone amplifiers that are used in most audio players. In the case of the extremely high-end electrostatic headphones, such as the Stax SR-007, a specialized electrostatic headphone amplifier or transformer step-up box and power amplifier is required to use the headphones, as only a dedicated electrostatic headphone amplifier or transformer can provide the voltage levels necessary to drive the headphones. Most headphone amplifiers provide power between 10 mW and 2 W depending on the specific headphone being used and the design of the amplifier. Certain high power designs can provide up to 6W of power into low impedance loads, although the benefit of such power output with headphones is unclear, as the few orthodynamic headphones that have sufficiently low sensitivities to function with such power levels will reach dangerously high volume levels with such amplifiers.\n" ]
Are all solar systems formed within nebulae?
The largest stars (O and B type) form inside H II regions. Well, this might be the wrong way to think about it. It's the largest stars that actually *create* H II regions. Here's how it goes: 1. Big cloud of (mostly) neutral hydrogen molecules 2. Gravitational collapse 3a. If the gas gets dense enough, the cloud core collapses into a big star, O or B type, that sends out high energy, highly ionizing photons that ionize the hydrogen in a region around the star, thus creating an H II region. Probably, not many planets form around these stars since the solar winds from the stars are extremely strong. 3b. If the gas doesn't get very dense at the center, this process takes a little longer and we get a smaller (solar-type) star. Probably, these are the kinds of stars around which planets have time to form. Hope this helps!
[ "The Solar System has its own interplanetary dust cloud, as do extrasolar systems. There are different types of nebulae with different physical causes and processes: diffuse nebula, infrared (IR) reflection nebula, supernova remnant, molecular cloud, HII regions, photodissociation regions, and dark nebula.\n", "There are a variety of formation mechanisms for the different types of nebulae. Some nebulae form from gas that is already in the interstellar medium while others are produced by stars. Examples of the former case are giant molecular clouds, the coldest, densest phase of interstellar gas, which can form by the cooling and condensation of more diffuse gas. Examples of the latter case are planetary nebulae formed from material shed by a star in late stages of its stellar evolution.\n", "Planetary nebulae are the remnants of the final stages of stellar evolution for lower-mass stars. Evolved asymptotic giant branch stars expel their outer layers outwards due to strong stellar winds, thus forming gaseous shells, while leaving behind the star's core in the form of a white dwarf. The hot white dwarf illuminates the expelled gases producing emission nebulae with spectra similar to those of emission nebulae found in star formation regions. Technically they are H II regions, because most hydrogen are ionized, but are denser and more compact than nebulae found in star formation regions. Planetary nebulae were given their name by the first astronomical observers who were initially unable to distinguish them from planets, and who tended to confuse them with planets, which were of more interest to them. Our Sun is expected to spawn a planetary nebula about 12 billion years after its formation.\n", "Nebulae are often star-forming regions, such as in the \"Pillars of Creation\" in the Eagle Nebula. In these regions the formations of gas, dust, and other materials \"clump\" together to form denser regions, which attract further matter, and eventually will become dense enough to form stars. The remaining material is then believed to form planets and other planetary system objects.\n", "Round and planet-shaped, the nebula is also relatively faint. Planetary nebulae are not related to planets at all, but instead are created at the end of a sun-like star's life as its outer layers expand into space while the star's core shrinks to become a white dwarf. The transformed white dwarf star, seen near the center, radiates strongly at ultraviolet wavelengths and powers the expanding nebula's glow. The nebula's main ring structure is about a light-year across and the glow from ionized oxygen, hydrogen, and nitrogen atoms are colored blue, green, and red respectively.\n", "Planetary nebulae may play a very important role in galactic evolution. Newly born stars consist almost entirely of hydrogen and helium, but as stars evolve through the asymptotic giant branch phase, they create heavier elements via nuclear fusion which are eventually expelled by strong stellar winds. Planetary nebulae usually contain larger proportions of elements such as carbon, nitrogen and oxygen, and these are recycled into the interstellar medium via these powerful winds. In turn, planetary nebulae greatly enrich the Milky Way and their nebulae with these heavier elements – collectively known by astronomers as \"metals\" and specifically referred to by the metallicity parameter \"Z\".\n", "Still other nebulae form as planetary nebulae. This is the final stage of a low-mass star's life, like Earth's Sun. Stars with a mass up to 8–10 solar masses evolve into red giants and slowly lose their outer layers during pulsations in their atmospheres. When a star has lost enough material, its temperature increases and the ultraviolet radiation it emits can ionize the surrounding nebula that it has thrown off. Our Sun will produce a planetary nebula and its core will remain behind in the form of a white dwarf.\n" ]
why are the republican/democrat debates called debates? there's hardly any debating going on.
They're mostly called debates to lend some gravitas to the situation. What they are these days, however, is joint press conferences. It would be nice to have actual debates, but that would require politicians who are willing and able to think on their feet, and argue in defense of a position, rather than requiring an army of writers to create pre-prepared statements for them to memorize. There aren't many who are willing or able to do that.
[ "Debate has been common in recent elections in regards to the election of the President of the United States via the electoral college. The debate stems from the fact that the electoral college is a malapportioned body., and thus provides for a scenario whereby a candidate may win the election via the electoral college without carry a plurality of the popular vote.\n", "The twelve Republican presidential debates, and the nine forums, were a series of political debates held between the candidates for the Republican Party's nomination for the 2016 United States presidential election.\n", "Public debate may mean simply debating by the public, or in public. The term is also used for a particular formal style of debate in a competitive or educational context. Two teams of two compete through six rounds of argument, giving persuasive speeches on a particular topic.\n", "Public debate may mean simply debating by the public, or in public. The term is also used for a particular formal style of debate in a competitive or educational context. Two teams of two compete through six rounds of argument, giving persuasive speeches on a particular topic.\n", "During presidential elections in the United States, it has become customary for the main candidates (almost always the candidates of the two largest parties, currently the Democratic Party and the Republican Party) to engage in a debate. The topics discussed in the debate are often the most controversial issues of the time, and arguably elections have been nearly decided by these debates (e.g., Nixon vs. Kennedy). Candidate debates are not constitutionally mandated, but it is now considered a \"de facto\" election process. The debates are targeted mainly at undecided voters; those who tend not to be partial to any political ideology or party.\n", "Since 1980, the Republican Party of the United States has held debates between candidates for the Republican nomination in presidential elections during the primary election season. Unlike debates between party-nominated candidates, which have been organized by the bi-partisan Commission on Presidential Debates since 1988, debates between candidates for party nomination are organized by mass media outlets.\n", "The 2008 Republican Presidential Debates were political debates before the 2008 Republican Primaries. The first was May 3, 2007, at the Ronald Reagan Presidential Library in California. Other debates have taken place in New Hampshire, South Carolina, and Florida. They were generally broadcast by television networks.\n" ]
Is gravity the strongest at the surface of the earth?
That would be true if the Earth was a sphere of uniform density, but since the core is much denser than the mantle and crust, gravity peaks at the barrier between the mantle and the outer core. [Graphs for comparison.](_URL_0_) You can think of this as the amount of less dense "stuff" that the mantle/crust adds doesn't compensate for the extra distance away from the very dense core.
[ "Gravity on the Earth's surface varies by around 0.7%, from 9.7639 m/s on the Nevado Huascarán mountain in Peru to 9.8337 m/s at the surface of the Arctic Ocean. In large cities, it ranges from 9.7760 in Kuala Lumpur, Mexico City, and Singapore to 9.825 in Oslo and Helsinki.\n", "The gravitational field of the earth is neither perfect nor uniform. A flattened ellipsoid is typically used as the idealized earth, but even if the earth were perfectly spherical, the strength of gravity would not be the same everywhere, because density (and therefore mass) varies throughout the planet. This is due to magma distributions, mountain ranges, deep sea trenches, and so on.\n", "The gravity of Earth is the acceleration that is imparted to objects due to the distribution of mass within the Earth. Near the Earth's surface, gravitational acceleration is approximately . Local differences in topography, geology, and deeper tectonic structure cause local and broad, regional differences in the Earth's gravitational field, known as gravity anomalies.\n", "The force of gravity on the surface of the Earth, normally denoted \"g\", has remained constant in both direction and magnitude since the formation of the planet. As a result, both plant and animal life have evolved to rely upon and cope with it in various ways.\n", "The acceleration due to Earth’s gravity (see \"standard gravity\") at its surface is 976 to 983 Gal, the variation being due mainly to differences in latitude and elevation. Mountains and masses of lesser density within the Earth's crust typically cause variations in gravitational acceleration of tens to hundreds of milligals (mGal). The gravity gradient (variation with height) above Earth's surface is about 3.1 µGal per centimeter of height (), resulting in a maximal difference of about 2 Gal (0.02 m/s) from the top of Mount Everest to sea level.\n", "Gravity is a function of mass. While the average value of Earth's surface gravity is approximately 9.8 meters per second squared, given sufficiently sensitive instrumentation, it is possible to detect local variations in gravity from the different densities of natural materials: the value of gravity will be greater on top of a granite monolith than over a sand beach. Again with sufficiently sensitive instrumentation, it should be possible to detect gravitational differences between solid rock, and rock excavated for a hidden facility.\n", "Gravity is the weakest of the four fundamental interactions of physics, approximately 10 times weaker than the strong interaction, 10 times weaker than the electromagnetic force and 10 times weaker than the weak interaction. As a consequence, it has no significant influence at the level of subatomic particles. In contrast, it is the dominant interaction at the macroscopic scale, and is the cause of the formation, shape and trajectory (orbit) of astronomical bodies. For example, gravity causes the Earth and the other planets to orbit the Sun, it also causes the Moon to orbit the Earth, and causes the formation of tides, the formation and evolution of the Solar System, stars and galaxies.\n" ]
why does nintendo create "artificial demand"
There is no evidence they have **ACTUALLY** created fake shortages, this story pops up with virtually every console launch (I remember it for the Playstation 2) but the economics behind it don't work. Nintendo would not make more money by having people fight over a limited set of existing devices. You're right, it only benefits scalpers. They simply make devices that sometimes get really popular and have a hard time manufacturing enough to meet demand. Remember, Nintendo has to *spend the money first* to build the devices before it can sell them and make it back. It's hard to convince the Ninty finance guys "yeah let's build ten billion of them" until they can prove there's a demand for ten billion.
[ "Nintendo is one of the world's biggest video game development companies, having created several successful franchises. Because of its storied history, the developer employs a methodical system of software and hardware development that is mainly centralized within its offices in Kyoto and Tokyo, in cooperation with its division Nintendo of America in Redmond, Washington. The company also owns several worldwide subsidiaries and funds partner affiliates that contribute technology and software for the Nintendo brand.\n", "The concept of Labo came from Nintendo when they asked their employees to come up with ways that the Switch's Joy-Con could be used; out of many potential ideas, the idea of building cardboard toys around the controllers held promise. According to Shinya Takahashi, the use of cardboard as part of playthings is common among Japanese children, and as they started prototyping ideas, they found the \"trial and error\" process of putting together the cardboard toys was \"extremely fun\". As the Labo concept was developed, they found it fit well within Nintendo's overall philosophy on innovating new ways to have fun, and had potential to introduce the Switch to more than just game enthusiasts.\n", "Industrial Toys is an American developer/publisher of mobile games headquartered in Pasadena, California. It produces mobile games for core gamers and released its first title, Midnight Star, in early 2015. In July 2018, Electronic Arts acquired the company.\n", "Nintendo Software Technology (or NST) is an American video game developer. NST was created by Nintendo as a first-party developer to create games for the North American market, though their games have also been released in other territories such as Europe and Japan. Although the development team is based in North America, there is a traditional Nintendo and Japanese-centric design applied to the development of the software. Co-founders Scott Tsumura and Claude Comair retired in 2002 and 2006, respectively. NST is currently headed by Shigeki Yamashiro, and is located inside of Nintendo of America's headquarters in Redmond, Washington.\n", "SOTA Toys, or State Of The Art Toys, is a developer, manufacturer, and wholesaler of collectibles based on licensed properties from companies such as Capcom and Universal. Since the year 2000, they have created and manufactured numerous licensed products based on the characters from popular movies, TV shows, hit video games, and literary works, as well as legendary musicians and pop stars. Aside from being a developer and manufacturer, SOTA Toys also serves as fabricator and prototyper for the motion picture, toys/collectibles, and video game industry.\n", "Nintendo has a large stock of valuable IP characters and has developed many games. We cannot, however, simply port our existing games and IP to smart-device applications. A lot of thought is going into what kind of games for smart devices will further our business and how we can continue to foster good relationships with our existing dedicated video game platform business. Among the various ideas, a primary concern is enabling our consumers to play on not only smart devices, but also our dedicated video game systems. We want to build up the smart-device business as a core pillar of Nintendoʼs various businesses, but we have not yet reached that level. Nintendo is not at a stage where we can consider becoming a smart-device platform developer.\n", "Nintendo extensively advertised the Virtual Boy, and claimed to have spent US$25 million on early promotional activities. Advertising promoted the system as a paradigm shift from past consoles; some pieces used cavemen to indicate a historical evolution, while others utilized psychedelic imagery. Nintendo portrayed the system as a type of virtual reality, as its name indicates; it was to be more than just another gaming console.\n" ]
how come songs/music these days have so many writers yet they only last 3 minutes tops?
3 minutes is the standard pop song length. Now why are there so many writers? The answer is usually "samples". Here's one of my favourite examples: The Kanye West song "Stronger", which samples Daft Punk's "Harder Better Faster Stronger" which in turn sampled Edwin Birdsong's "Cola Bottle Baby" resulting in Kanye's song being credited to West, Bangalter, De Homem- Cristo, and Birdsong. If you see more than three writing credits, it's a safe bet at least some of these people did nothing more than record a song that got sampled in the new song.
[ "For each year, Miller wrote about ten or more of his favorite songs, providing analytical insights and placing the songs in context in the musical world of their era. Miller had kept annual countdown lists of his favorite records throughout his life, and his personal project of compiling those lists onto CDs evolved into a formal endeavor to explain what made those songs noteworthy, for what was then the last 50 years of recorded music. The writing process started in 2006, when Miller took a hiatus from music making after the release of \"What If It Works?\". Portions of the book were serially published in draft form on Miller's official web site, where Miller responded to fan requests by writing about one year at a time, in random order.\n", "This project initially came about as part of \"February Album Writing Month,\" a website that challenges songwriters to write 14 songs in 28 days. The three songwriters wrote and recorded rough demos of the first 42 songs in February 2006 (leaving only George W. Bush for later). \"It was an amazing challenge to get that many songs written, even split three ways,\" notes Kiefer. \"Blasting the first four or five is easy and then you’ve used up all the ideas that have been floating around and have to come up with new ones. And you have to come up with those new ideas right now.\"\n", "Pete Shelley wrote eight of the songs, whilst Steve Diggle wrote the remaining five songs. When interviewed by \"Ear Candy Mag\", Pete Shelley said that, compared to writing songs in the 1970s, there was more ways of writing songs for \"Modern\" but \"then again there's more distractions.\" He said \"I think because a lot of the songs we did as the Buzzcocks were all written five minutes before going into the studio. So, its easier when you start writing songs. You haven't got any songs that you know you are trying to write like that. So, you don't have that subconscious fear of coming up with the same song twice. It's a little bit harder than that, trying to make sure that you don't re-write the same songs ad nauseam.\" When asked if his writing style was different than Diggle's, he said \"well, I tend to wait until the last minute before I write songs, where Steve likes to finish them all and have them all ready. I'm notoriously bad... all right you have to do the world tour tomorrow! So I just stay up all night writing the lyrics. If it was me, I'd wait until the day of release before finishing.\"\n", "He has written over 2500 song lyrics. He is well known for composing lyrics very quickly. On TVB's show \"Be My Guest\", he admitted that his fastest record for writing the complete lyrics to a song is 45 minutes. \n", "Newman had written some songs for the album: \"My method of writing songs, which I hadn't used for 30 years, is to write them on acoustic guitar. They take an average of five minutes each. If it's not written in five minutes, it's not going to get written. I'd sit on the couch, play a bit, if I had some words from Graham, jam 'em in, record it to my iPhone, then I'd present a bunch of songs to Rob and Graham. Rob said [derisively], 'It sounds like the '70s' and Graham said, 'I hate acoustic guitar,' so I knew we were onto a winner. That's so classic Wire.\"\n", "During his 60-year songwriting career, Tabrar wrote thousands of songs, many of them written to order; he is known to have written 7,200 songs, but claimed to have written more than twice that number.\n", "Goeslaw has noted that her most popular songs are generally those which are written quickly, citing the award-winning \"Menghitung Hari\" (\"Counting the Days\"), which was written in four days, as an example. She has noted that she abandons songs which leave her with a writer's block, as even when they are finished they are not well received. Her husband does the arrangement, sometimes meaning that songs are put on hold because he is busy.\n" ]
Looking for a couple of good books for two exams I have coming up. British society 1900-1950 ish
I'd recommend Peter Clarke's *Hope and Glory* (2nd ed, 2004) as a good overview of social, political and economic history of Britain during the 20th century. Based on your interest in sufferage and the impact of the Great War, Id also recommend Nicoletta Gullace's *The Blood of Our Sons* (2002) which looks at how the war impacted the relationship between gender and citizenship. That said, as a teacher myself, if this is for an exam I'd recommend focusing first and foremost on the readings assigned for the class. That's the material that you will be directly graded on.
[ "BULLET::::- In July 1998, students of the Radcliffe Publishing Course, at the request of the Modern Library editorial board, compiled their own list of the 100 best English-language novels of the 20th century, and the book was ranked 84th.\n", "The history of the book in the United Kingdom has been studied from a variety of cultural, economic, political, and social angles. The learned Bibliographical Society first met in 1892. In recent years influential scholars include Frederic Sutherland Ferguson, Philip Gaskell, Ronald Brunlees McKerrow, and Alfred W. Pollard.\n", "BULLET::::- \"A Critical Dictionary of English Literature, and British and American Authors, Living and Deceased, from the Earliest Accounts to the Middle of the Nineteenth Century: Containing Thirty Thousand Biographies and Literary Notices, with Forty Indexes of Subjects\" compiled by Samuel Austin Allibone (page 148; Trübner & Co., 1859)\n", "Thirteen editions were issued during the 19th century. The articles, often very brief, were considered excellent and trustworthy, especially on German subjects, gave references to the best books, and included biographies of living men.\n", "Published that same year, his study, \"The English Common Reader\" (1957), showcased what his research methods could achieve. It brought together information about what sorts of books, magazines, newspapers, and ephemera ordinary Britons were reading during the first age of industrialized publishing, and presented it in a clear and thoughtful way. In his subsequent books, curiosity led him to explore a wide variety of subjects, most but not all Victorian, ranging from literary biography to the literary contexts of paintings to London panoramas to sensational murders. Among these, \"The Shows of London\" (1978), a study of public entertainments from 1600 to 1862, stands out as a major feat of research. The slender book, \"Victorian People and Ideas\" (1980), remains one of the best introductions to the period for undergraduates and general readers. \"Writers, Readers, and Occasions\" (1989) brought together essays he had published in various journals over the years. The concluding essay in that volume, \"'Tis Forty Years Since,\" offers a retrospective on the evolution of scholarly interest in the Victorians in the twentieth century, from the perspective of a \"scholar adventurer\" who had played a major role in fostering that interest.\n", "Ninety-Nine Novels: The Best in English since 1939 — A Personal Choice is an essay by British writer Anthony Burgess, published by Allison & Busby in 1984. It covers a 44-year span between 1939 and 1983. Burgess was a prolific reader, in his early career reviewing more than 350 novels in just over two years for the \"Yorkshire Post\". In the course of his career he wrote over thirty novels.\n", "Kay Oldham Cornelius (14 January 1933 – 23 January 2017) was a published author with more than a dozen novels to her credit. She also wrote test units for the PSAT and College Board specialized-subject achievement tests, as well as reviewing the Board's English literature examination.\n" ]
Why does physics assume the existence of elementary particles?
Physics does not *assume* the existence of elementary particles. Rather, we construct models, see if they work, and it turns out that models that predict the existence of elementary particles work very well. When you smash particles together, you are not breaking them apart. You are taking them and all their energy -- including the energy present in their mass via E=mc^(2) -- and making it possible for that energy to re-form into new entities. We refer to some objects as matter and some as force carriers because of the way we happen to think about different entities and their interactions, but that is not necessary.
[ "Around 1980, an elementary particle's status as indeed elementary—an \"ultimate constituent\" of substance—was mostly discarded for a more practical outlook, embodied in particle physics' Standard Model, what's known as science's most experimentally successful theory. Many elaborations upon and theories beyond the Standard Model, including the popular supersymmetry, double the number of elementary particles by hypothesizing that each known particle associates with a \"shadow\" partner far more massive, although all such superpartners remain undiscovered. Meanwhile, an elementary boson mediating gravitation—the graviton—remains hypothetical.\n", "In mathematical logic, an elementary theory is one that involves axioms using only finitary first-order logic, without reference to set theory or using any axioms which have consistency strength equal to set theory.\n", "In particle physics one gains knowledge about elementary particles by accelerating particles to very high kinetic energy and letting them impact on other particles. For sufficiently high energy, a reaction occurs that transforms the particles into other particles. Detecting these products gives insight into the physics involved.\n", "Elementary particles are particles with no measurable internal structure; that is, it is unknown whether they are composed of other particles. They are the fundamental objects of quantum field theory. Many families and sub-families of elementary particles exist. Elementary particles are classified according to their spin. Fermions have half-integer spin while bosons have integer spin. All the particles of the Standard Model have been experimentally observed, recently including the Higgs boson in 2012. Many other hypothetical elementary particles, such as the graviton, have been proposed, but not observed experimentally.\n", "In quantum mechanics, the concept of a point particle is complicated by the Heisenberg uncertainty principle, because even an elementary particle, with no internal structure, occupies a nonzero volume. For example, the atomic orbit of an electron in the hydrogen atom occupies a volume of ~10 m. There is nevertheless a distinction between elementary particles such as electrons or quarks, which have no known internal structure, versus composite particles such as protons, which do have internal structure: A proton is made of three quarks. Elementary particles are sometimes called \"point particles\", but this is in a different sense than discussed above.\n", "In particle physics, an elementary particle or fundamental particle is a with no sub structure, thus not composed of other particles. Particles currently thought to be elementary include the fundamental fermions (quarks, leptons, antiquarks, and antileptons), which generally are \"matter particles\" and \"antimatter particles\", as well as the fundamental bosons (gauge bosons and the Higgs boson), which generally are \"force particles\" that mediate interactions among fermions. A particle containing two or more elementary particles is a \"composite particle\".\n", "Particle physics is the study of the elementary constituents of matter and energy and the interactions between them. In addition, particle physicists design and develop the high-energy accelerators, detectors, and computer programs necessary for this research. The field is also called \"high-energy physics\" because many elementary particles do not occur naturally but are created only during high-energy collisions of other particles.\n" ]
how countries like egypt and jordan can seek and destroy isis within days/hours after their countrymens' executions, and yet the us and other more powerful enemies of isis seem to have trouble locating them?
Most of the time we have no problems finding who we are looking for. the problem is how to deploy troops to go resolve the problem. in a lot of cases we find them in a "not so internationally friendly way" so we have to create a story to allow us to engage the mission or wait until we have a story or a reason to be in that area. talking to them in some instances isn't as easy as it would seem because they may have informants within the ranks. Source: Former 96B
[ "Egypt employs a \"shoot to stop\" policy against refugees attempting to continue to Israel. According to Human Rights Watch, over 50 refugees, including women and children, have been shot by Egyptian border guards since 2007.\n", "BULLET::::- 16 February: Egypt retaliated against ISIL for the beheading of 21 Egyptian Christians by bombing ISIL camps, training sites, and weapons storage depots in neighbouring Libya. 50 ISIL militants in Derna were killed by the initial airstrikes.\n", "An Iraqi intelligence source stated on 21 October that ISIL executed 284 men and boys abducted from Mosul for the purpose of using them as human shields. The civilians were shot and put in a mass grave. A United Nations official said the UN is \"gravely worried\" about the fate of 200 families from Somalia and 350 families from Najafia who were abducted Monday by ISIL, who could be used as human shields.\n", "An Iraqi intelligence source stated on 21 October that ISIL executed 284 men and boys abducted from Mosul for the purpose of using them as human shields. The civilians were shot and put in a mass grave. A United Nations official said the UN is \"gravely worried\" about the fate of 200 families from Somalia and 350 families from Najafia who were abducted Monday by ISIL, who could be used as human shields.\n", "It is alleged that groups in opposition to the government in the Syrian Civil War also abduct and detain individuals arbitrarily. According to a brief released by Amnesty International in December 2013, the Islamic State of Iraq and al-Sham (ISIS), an opposition group controlling significant territory in northern Syria, is responsible for abductions and arbitrary detentions of citizens. AI states that those targeted by ISIS for abduction have included a \"wide range of individuals, including people suspected of committing ordinary crimes, such as theft or murder, and others accused of committing religiously prohibited acts, such as zina (sex out of wedlock) and alcohol consumption. As well, ISIS forces have targeted local people suspected of organizing protests and opposition to their rule, including community activists and members of local councils set up to provide services to residents following the withdrawal of Syrian government forces, other civil society and media activists, and commanders and members of rival armed groups, including those operating as part of the Free Syrian Army. ISIS is also alleged to have abducted foreign nationals, including journalists, staff of international organizations and religious figures.\"\n", "On the night of 21–22 February 2015, a Turkish military convoy including tanks and other armored vehicles numbering about 100 entered Syria to evacuate the tomb's 40 guards and relocate the remains. One soldier died during the operation. The tomb complex was destroyed to prevent its use by ISIS.\n", "ُThe Assassins were a group of Ismaili Shia Muslims that, by capturing or building impregnable forts, established a \"state\" of their own inside the hostile territories of the Seljuq Empire of Persia, a Sunni Muslim government, and later in the Levant. Lacking a conventional army, in order to survive, they started using unconventional tactics such as assassination of prominent enemy figures and psychological warfare.\n" ]
In the movie Kingdom of Heaven, Saladin is depicted as having a chest full of ice in his tent in the middle of the desert. How would he have gotten ahold of ice and preserved it?
This has been asked a few times before: like [here ](_URL_1_) with an answer by /u/Eireika and [another one](_URL_0_) with a nested comment by /u/Valkine adding the the scene was probably a creative freedom, mixing a historical known ice gift from Saladin elsewhere into the movies setting. tl;dr: ice could be harvested and transported isolated with hay and sawdust and stored in specialized buildings and pits but conditions of practicality and cost apply.
[ "The Boneless King captures Shimmer, Monkey, and Indigo. They manage to escape and attempt to retrieve Baldy's cauldron, in which Thorn's soul is now sealed. However the Boneless King turns the tables on them and traps them in a cavern beneath Egg Mountain where he was formerly imprisoned with the river poisoned and cavern sealed up. Indigo figures out that water is the exclusion to the barrier spell as the river can flow in, so transformed into ice versions of themselves, they are able to escape. Returning to the Boneless King's tomb disguised as soldiers, they find that he has finished his excavation and left. The three catch up to where the pack train is camped for the night, but are unable to bluff their way past the pickets and are forced to transform into horses. They discover that some of the guardsmen and horses have been poisoned from drinking the river water and that the pack train is transporting the stone soldiers that were found in the Boneless King's tomb. Still disguised, they accompany the pack train on its journey. On the way, mysterious gases emitted by the statues follow the pack train, arousing such resentment and fear from the population such that \"the countryside was almost ready to rise in rebellion\" by the time they reach the capital, Ramsgate. The pack train is nearly attacked by villagers at the capital's gates, but is saved by reinforcements. The statues are buried in a pit on the palace grounds.\n", "The Anubis Shrine was part of the grave goods of Tutankhamun (18th Dynasty, New Kingdom). The tomb was discovered almost intact on 4 November 1922 in the Valley of the Kings in west Thebes by Howard Carter. Today the object, with the find number 261, is an exhibit at the Egyptian Museum in Cairo, with the inventory number JE 61444.\n", "An ashen husk resembles a normal zombie or skeleton for the most part, except bone dry. So devoid of fluid they are brown and crumbling, and their flesh so desiccated that it appears nearly skeletal. Accompanying them wherever they go is a dry, sucking heat that makes the air waver, almost as though they bring with them the soul of the waterless desert.\n", "The dead Tibetan defenders were \"lying in heaps,\" and it took a major effort using prisoners to drag all the bodies away. For several days the sappers were kept busy blowing up what remained of the defences at Gyantse, Tsechen and other places and finding hidden stores. Between Gyantse and Tsechen: \"Our way was strewn with corpses. The warriors from the Kham country, who formed a large part of the Tibetan army, were glorious in death, long-haired giants, lying as they fell with their crude weapons lying beside them, and usually with a peaceful, patient look on their faces.\"\n", "In the middle of January, 1915, a Turkish Army force of 20,000 entered Sinai by way of El Auja on an unsuccessful expedition against the Suez Canal. At this time most of the dressed stone was taken from the ancient buildings for building work in Gaza.\n", "The underground space for the most part remained empty except during Crusader rule over Jerusalem. The Crusaders converted it into a stable for the cavalry. The rings for tethering horses can still be seen on some of the pillars. The structure has been called Solomon's Stables since the time of the Crusades as a historical composite: 'Solomon's' refers to the First Temple built on the site, while the 'stables' refers to the functional usage of the space by the Crusaders in the time of Baldwin II (King of Jerusalem 1118–1131 CE).\n", "Al-Jamadi came to be known by some Abu Ghraib personnel as \"The Iceman\" and \"Mr. Frosty.\" Others called him \"Bernie,\" a reference to the movie \"Weekend at Bernie's\" in which a dead body is treated as if still alive.\n" ]
How much autonomy did the Republics of the USSR have?
The Republics had varying degrees of autonomy. Never much. Citizens of the Republics had varying degrees of rights. Thus it was possible for the residents of some Republics to easily visit Moscow, while a citizen of Moscow might have trouble visiting the same Republic.
[ "The first Soviet republics were short-lived communist revolutionary governments that were established in what had been the Russian Empire after the October Revolution and under its influence. These states included some such as the Lithuanian Soviet Socialist Republic and the Latvian Socialist Soviet Republic which won independence from Russia during the civil war period. Others such as the Ukrainian Soviet Republic and the Socialist Soviet Republic of Byelorussia later became union republics of the Soviet Union and are now independent states. Still others such as the Kuban Soviet Republic and the Bukharan People's Soviet Republic were absorbed into other polities and no longer formally exist under those names.\n", "The Republics of the Union of Soviet Socialist Republics or Union Republics () were the ethnically based proto-states of the Soviet Union. For most of its history, the USSR was a highly centralized state; the decentralization reforms during the era of \"Perestroika\" (\"Restructuring\") and \"Glasnost\" (\"Openness\") conducted by Mikhail Gorbachev are cited as one of the factors which led to the dissolution of the Soviet Union in 1991.\n", "Legally, the Soviet Union and its fifteen union republics constituted a federal system, but the country was functionally a highly centralised state, with all major decision-making taking place at the Kremlin, the capital and seat of government of the country. The constituent republic were essentially unitary states, with lower levels of power being directly subordinate to higher ones. Throughout its 72-year existence, the administrative divisions of the Ukrainian SSR changed numerous times, often incorporating regional reorganisation and annexation on the part of Soviet authorities during World War II.\n", "The Russian Soviet Federative Socialist Republic (called \"Russian Socialist Federative Soviet Republic\" at the time), together with the Ukrainian, Byelorussian, and Transcaucasian Soviet Socialist Republics, formed the Union of Soviet Socialist Republics (USSR), or Soviet Union, on 30 December 1922. Out of the 15 republics that would make up the USSR, the largest in size and over half of the total USSR population was the Russian SFSR, which came to dominate the union for its entire 69-year history.\n", "The republics were established in early Soviet Russia. On 15 November 1917, Vladimir Lenin issued the Declaration of the Rights of the Peoples of Russia, giving Russia's minorities the right to self-determination. However, most of these new states would be re-conquered by the Soviets during the Russian Civil War. When the Soviet Union was formally created on 30 December 1922, the minorities of the country were relegated to Autonomous Soviet Socialist Republics (ASSR), which had less power than the Republics of the Soviet Union. The early Soviet authorities nevertheless encouraged minorities to join the governments of their republics to represent themselves and de-Russify the country in a period known as korenizatsiya. This policy also affected ethnic Russians and was particularly enforced in ASSRs where indigenous people were already a minority in their own homeland, like the Buryat ASSR.\n", "On 8 December 1991, the presidents of Russia, Belarus, and Ukraine formally dissolved the USSR, and then constituted the Commonwealth of Independent States (CIS). Soviet President Gorbachev resigned on 25 December 1991; the next day, the Supreme Soviet dissolved itself, officially dissolving the USSR on 26 December 1991. During the next 18 months, inter-republican political efforts to transform the Army of the Soviet Union into the CIS military failed; eventually, the forces stationed in the republics formally became the militaries of the respective republican governments.\n", "Constitutionally, the USSR was a federation of constituent Union Republics, which were either unitary states, such as Ukraine or Byelorussia (SSRs), or federal states, such as Russia or Transcaucasia (SFSRs), all four being the founding republics who signed the Treaty on the Creation of the USSR in December 1922. In 1924, during the national delimitation in Central Asia, Uzbekistan and Turkmenistan were formed from parts of the Russia's Turkestan ASSR and two Soviet dependencies, the Khorezm and Bukharan SSRs. In 1929, Tajikistan was split off from the Uzbekistan SSR. With the constitution of 1936, the Transcaucasian SFSR was dissolved, resulting in its constituent republics of Armenia, Georgia and Azerbaijan being elevated to Union Republics, while Kazakhstan and Kirghizia were split off from Russian SFSR, resulting in the same status. In August 1940, Moldavia was formed from parts of the Ukraine and Bessarabia and Northern Bukovina. Estonia, Latvia and Lithuania (SSRs) were also admitted into the union which was not recognized by most of the international community and was considered an illegal occupation. Karelia was split off from Russia as a Union Republic in March 1940 and was reabsorbed in 1956. Between July 1956 and September 1991, there were 15 union republics (see map below).\n" ]
why do we feel the urge to destroy things when we're angry?
Anger management therapist here. People usually get angry in response to feelings of vulnerability and disempowerment. Any situation where someone gets angry, they are also probably feeling something like hurt, insecure, disrespected, invalidated, betrayed, frustrated, threatened, the list goes on. Anger allows you to get some of that power back and direct those negative feelings outward on to someone/something else (e.g. destroying something). This often makes people feel better in the short term, even though there are typically long term consequences of acting aggressively. Also, when I say this can make people feel better, the anger and aggression is sometimes identified as relatively better than sitting with feelings of vulnerability and powerlessness. Emotions are subjective and there are tons of individual differences between people. This is a ELI5 thread. Edit: Added a couple words to more explicitly address OP's question about destroying objects and to clarify the perceived benefits of aggression versus sitting with powerlessness.
[ "Self-destructive behavior is formed by a repetitive bad habit that is ultimately caused by a preadolescent event that makes them act out in such ways. These past events act as barriers that causes one to feel insecure about a specific situation or event. When this happens, it causes their emotions to be sporadic and they begin to take part in violent actions. \n", "In James McCosh's book \"Motive Powers\", he notes that \"We may be angry and sin not; but this disposition may become sinful, and this in the highest degree. It is so when it is excessive, when it is rage, and makes us lose control of ourselves. It is so, and may become a vice, when it leads us to wish evil to those who have offended us. It is resentment when it prompts us to meet and repay evil by evil. It is vengeance when it impels us to crush those who have injured us. It is vindictiveness when it is seeking out ingeniously and laboriously means and instruments to give pain to those who have thwarted us. Already sin has entered.\"\n", "The expression has since become a blanket term for (often unwise) self-destructive actions motivated purely by anger or desire for revenge. For example, if a man was angered by his wife, he might burn down their house to punish her; however, burning down \"her\" house would also mean burning down \"his\", along with all of their possessions.\n", "However, in political and military contexts, destructive criticisms may be essential to save resources, or to save lives among one's own group. An idea in itself is not dangerous, but an idea proposed in a particular context can be very dangerous, so that people feel that it should be disarmed by mercilessly criticizing it. The ultimate destructive criticism occurs when people and property are physically destroyed.\n", "\"I’m not angry!\" is the story of Navid, a starred and expelled university student who - while trying to provide the least requirements of a normal life -, tries not to get angry when he is faced with the immoralities prevalent in the society, and does all he can not to lose his love, Setareh.\n", "Self-destructive behavior may also manifest itself in an active attempt to drive away other people. For example, they may fear that they will \"mess up\" a relationship. Rather than deal with this fear, socially self-destructive individuals engage in annoying or alienating behavior, so that others will reject them first. \n", "Research on emotion has shown that anger is often caused by interruptions of plans and expectations, especially through the violation of social norms. This sense of anger can be magnified when the individual does not understand why they are unable to meet their goal or task at hand or why there was a violation of social norms. Psychologists have argued that this is particularly relevant to computer rage, as computer users interact with computers in a similar manner that they interact with other people (for more information, see The Media Equation). Thus, when computers fail to function in the face of incoming deadlines or an important task to accomplish, users can feel betrayed by the computer in the same way they can feel betrayed by other people. Specifically, when users fail to understand why their computer will not work properly, often in the times they need it to the most, it can invoke a sense of hostility as it is interpreted as a breach of social norms or a personal attack. Consistent with this finding, perceived betrayal by the computer can also elicit other negative emotions. One survey of US adults reported that 10% of users who experience computer issues experienced feeling helplessness, and 4% reported feeling victimized. In the same survey, 7% adults ages 18–34 reported that they had cried over their computer problems within the previous six months.\n" ]
can someone explain aleph-null to me like i'm 5?
First some vocabulary: if you have a collection of things in it, we call the number of things the "cardinality" of the collection. This is fine if you only have finitely many things; the cardinality is just whatever number you have. But what if you have an infinite number of things? It turns out that infinity isn't a really well defined idea; there are different "sizes" of infinity. The smallest of these, we call Aleph-null. What is it? It's the infinity that you can count. If you can take all of your infinite things and mark them "first, second, third" and so on, then we say you have "countably many" of them and that the cardinality of your set is Aleph-null. For a first example, the counting numbers themselves. For a second example, the *even* counting numbers; call 2 the first, 4 the second, and so on. If you continue numbering them this way then eventually every even counting number would be given a position. Thus, even though there are "more" counting numbers than even counting numbers (twice as many, the evens and the odds), they are both sets with cardinality Aleph-null; this is one of the very weird things about infinity—if you have an infinite number of something and take away some, even an infinite amount, you might still have an infinite number left over. It turns out that some collections (like the collection of all real numbers, which includes things like pi and the square root of 2) are *bigger* than Aleph-null; if you assigned every counting number to one of them—said "this is the first, this is the second" and so on, so that given any counting number you could identify the number in that position—there would still be some that you missed. In fact, there would be more of them without numbers assigned to them than there were *with* numbers assigned to them. The set has cardinality *greater* than Aleph-null.
[ "In morphology, a null morpheme or zero morpheme is a morpheme that has no phonetic form. In simpler terms, a null morpheme is an \"invisible\" affix. It is a concept useful for analysis, by contrasting null morphemes with alternatives that do have some phonetic realization. The null morpheme is represented as either the figure zero (\"0\") or the empty set symbol ∅. \n", "The standard semantics of a sequent is an assertion that whenever \"every\" formula_24 is true, \"at least one\" formula_19 will also be true. Thus the empty sequent, having both cedents empty, is false. One way to express this is that a comma to the left of the turnstile should be thought of as an \"and\", and a comma to the right of the turnstile should be thought of as an (inclusive) \"or\". The sequents\n", "Scotus deals immediately with two objections he can see: first, that there cannot be a first, and second, that the argument falls apart when 1) is questioned. He states that infinite regress is impossible, because it provokes unanswerable questions, like, in modern English, \"What is infinity minus infinity?\" The second he states can be answered if the question is rephrased using modal logic, meaning that the first statement is instead \"It is possible that something can be produced.\"\n", "In morpheme-based morphology, the term null allomorph or zero allomorph is sometimes used to refer to some kind of null morpheme for which there are also contexts in which the underlying morpheme is manifested in the surface structure. It is therefore also an allomorph. The phenomenon itself is known as \"null allomorphy\", \"morphological blocking\" or \"total morpheme blocking\".\n", "The \"Disquisitiones\" covers both elementary number theory and parts of the area of mathematics now called algebraic number theory. However, Gauss did not explicitly recognize the concept of a group, which is central to modern algebra, so he did not use this term. His own title for his subject was Higher Arithmetic. In his Preface to the \"Disquisitiones\", Gauss describes the scope of the book as follows:\n", "Null is a mystic life-form created over the ages from the collective unconscious of the 500,000 members of the extinct S'Raphh race, and as such has an almost unlimited ability to manipulate the forces of magic. Null normally has no corporeal form, and usually takes the form of a multi-eyed, multi-tentacled cloud of an unknown purple gaseous substance. Its intelligence is immeasurable, and it has incredible stamina and durability. Null has the ability to manipulate the forces of magic for a wide variety of effects, including physical malleability, intangibility, levitation, inter-dimensional teleportation, restoration of spirits to the physical plane, reanimation and control of corpses, possession of the bodies of physical beings, telepathy, illusion-casting, and the ability to project powerful psychokinetic concussion blasts.\n", "However, this still leaves a sign ambiguity if the remainder is nonzero: two possible choices for the remainder occur, one negative and the other positive, and two possible choices for the quotient occur. Usually, in number theory, the positive remainder is always chosen, but programming languages choose depending on the language and the signs of or . Standard Pascal and ALGOL 68 give a positive remainder (or 0) even for negative divisors, and some programming languages, such as C90, leave it to the implementation when either of or is negative. See the table for details. modulo 0 is undefined in most systems, although some do define it as .\n" ]
why are domestic power outlets in the united states 120v? is there any story behind that convention?
Basically, it's because old light bulbs sucked. America was quite a ways ahead of the rest of the world when it came to early electricity and was about to make good lightbulbs that ran at 120 volts. If it was upped to 240 (which is easier to transmit long distances), they would burn out pretty quickly. By the time Europe got into building their electrical infrastructure, 240 volt bulbs were good enough that they could just use straight 240v. But by this time, America already had the standard of 120. Sauce: _URL_0_ \* Japan is the only other country (edit: that I could think of at the time of original typing) that uses 120v electricity, but I don't know the story behind that.
[ "CERC and State Electricity Regulatory Commission (SERC) are the two electricity regulators – one operating at the central level and the other at various state levels. CERC’s primary function was to regulate the tariffs of central generating stations as well as for all interstate generation, transmission and supply of power. Whereas SERC’s primary function was to determine bulk and retail tariffs to be charged to customers, regulate the operations of intrastate transmission, including those of the State Load Despatch Center (SLDC).\n", "By 1996, prevailing opinion on the utilities in the United States had changed. Rather than granting one company the exclusive right to generate, transmit and distribute electricity in a specific geographic area, and fixing the rates for that service as one package, it was commonly held that consumers would benefit from opening as much service as possible to competition on an open market. At the federal level, the Federal Energy Regulatory Commission had issued Order 888, opening access to the national transmission grids. Subsequent orders established an open energy marketplace and set rules for participation in it. However, it was left to the individual states to determine the best way to give their electricity customers access to the grid and the benefits of an open market.\n", "In the 1990s, as states and regions in the United States established wholesale competition for electricity, groups of utilities and their federal and state regulators began forming independent transmission operators that would ensure equal access to the power grid for non-utility firms, enhance the reliability of the transmission system and operate wholesale electricity markets. Today, seven of these grid operators, either independent system operators (ISOs) or RTOs, coordinate the power grid to ensure the reliable delivery of two-thirds of the electricity used in the United States to two-thirds of its population. Most are overseen by FERC.\n", "There are regions of the United States where ISOs do not exist and, subsequently, the utilities do not engage in wholesale power markets. The Pacific Northwest, and states east of California and west of the Dakotas, Nebraska, Kansas and Texas largely do not participate. The majority of Southeastern states also do not participate in wholesale markets. While these regions must conform to open access as mandated by FERC, the power exchanges between utilities is mostly facilitated through bilateral contracts and power purchase agreements\n", "Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to appliances, equipment, and lighting typically found in homes and offices. (For industrial machinery, see Industrial and multiphase power plugs and sockets.) Some countries have more than one voltage available. For example, in North America most sockets are attached to a 120 V supply, but there is a 240 V supply available for large appliances. Often different sockets are mandated for different voltage or current levels.\n", "BULLET::::- December 4: California utilities are forced to cut off electricity supplies to some \"interruptible\" customers due to a supply shortage. California has suffered shortages and high wholesale electricity prices since May 2000. The immediate shortage stems, in part, from a reduction in electricity imports from the Pacific Northwest as a result of cold weather in the area. Other problems include: gas supply problems, low availability of hydroelectric and nuclear generating capacity, and high power demand. (DJ)\n", "In 1996, there were 3,195 electric utilities in the United States, of which fewer than 1,000 were engaged in power generation. This leaves a large number of mostly smaller utilities engaged only in power distribution. There were also 65 power marketers. Of all utilities, 2,020 were publicly owned (including 10 Federal utilities), 932 were rural electric cooperatives, and 243 were investor-owned utilities. The electricity transmission network is controlled by Independent System Operators or Regional Transmission Organizations, which are not-for-profit organizations that are obliged to provide indiscriminate access to various suppliers in order to promote competition.\n" ]
When did Norman England no longer associate with the French monarchy?
So, basically, it depends on what you mean by "associate." The Kingdom of England was never considered part of the Kingdom of France or subordinate to it. English kings and property owners were not bound to the king of France under any kind of "feudal" ties. The Anglo-Norman, Angevin, and Plantagenet kings of England, however, were also major landowners *within* the Kingdom of France. Obviously William the Conqueror was the duke of Normandy, but his descendants acquired a vast swathe of western France through inheritance and marriage, becoming also the dukes of Aquitaine and Gascony and the counts of Anjou, Maine, Nantes, and Poitiers. The English kings (theoretically) owed fealty to the French kings for their French lands, but in practice a state resembling the Cold War prevailed throughout much of the second half of the 12th centuries. On the lower level, during the 11th-12th centuries, almost all major English landowners were of Norman, Breton, Flemish, or French origin and owned property on both sides of the channel. Because they were subjects of both kings, they theoretically owed loyalty and service to both kings; in practice, these great men were out for their own ends and were more than willing to manipulate, quarrel with, scheme against, and sell out their kings when the situation called for it. The English kings lost most of their French possessions in the first two decades of the 13th century. Following the death of Richard I, the French invaded and seized Normandy and Aquitaine. Anglo-Norman lords were faced with a choice: abandon their French property and keep their English, or the opposite. At the conclusion of the war, the English crown was left only with Gascony and a bit of Poitou, and the permanent connection to Normandy was severed. However, the English aristocracy would continue to speak Anglo-Norman (a dialect of old French) for at least another century.
[ "After the Norman conquest in 1066, Anglo-Norman replaced English as the official language of England. However, in the thirteenth and fourteenth centuries, the Plantagenet kings of England lost most of their possessions in France, began to consider England to be their primary domain, and turned to the English language. King Edward I, when issuing writs for summoning parliament in 1295, claimed that the King of France planned to invade England and extinguish the English language, \"a truly detestable plan which may God avert.\" In 1338, Philip VI of France authored the Ordinance of Normandy, which again called for the destruction and elimination of the English nation and language. The Hundred Years' War (1337–1453) between England and France changed societies on both sides of the Channel.\n", "Since the Norman Conquest of 1066, English monarchs had held titles and lands within France, the possession of which made them vassals of the kings of France. Over the centuries, English holdings in France had varied in size, but by 1337 only Gascony in south western France and Ponthieu in northern France were left. The independent minded Gascons had their own customs and claimed to have a separate language. They preferred their relationship with a distant English king who left them alone to one with a French king who would interfere in their affairs. Following a series of disagreements between Philip VI of France and Edward III of England, on 24 May 1337 Philip's Great Council in Paris agreed that the Duchy of Aquitaine, effectively Gascony, should be taken back into Philip's hands on the grounds that Edward was in breach of his obligations as a vassal. This marked the start of the Hundred Years' War, which was to last one hundred and sixteen years.\n", "However, in the mid-eleventh century there was a dispute over the English throne, and the French-speaking Normans, who were of Viking stock, invaded England under their duke William the Conqueror and took over following the Battle of Hastings in 1066, and crowned themselves Kings of England. The Normans took control of the land and the political system. Feudal culture took root in England, and for the next 150 years England was generally considered of secondary importance to the dynasty's Continental territories, notably in Normandy and other western French provinces. The language of the aristocracy was French for several hundred years after the Norman Conquest. Many French words were adopted into the English language as a result. About one third of the English language is derived from or through various forms of French. The first Norman kings were also the Dukes of Normandy, so relations were somewhat complicated between the countries. Though they were dukes ostensibly under the king of France, their higher level of organisation in Normandy gave them more de facto power. In addition, they were kings of England in their own right; England was not officially a province of France, nor a province of Normandy.\n", "The Normans and French who arrived after the conquest saw themselves as different from the English. They had close family and economic links to the Duchy of Normandy, spoke Norman French and had their own distinctive culture. For many years, to be English was to be associated with military failure and serfdom. During the 12th century, the divisions between the English and Normans began to dissolve as a result of intermarriage and cohabitation. By the end of the 12th century, and possibly as early as the 1150, contemporary commentators believed the two peoples to be blending, and the loss of the Duchy in 1204 reinforced this trend. The resulting society still prized wider French cultural values, however, and French remained the language of the court, business and international affairs, even if Parisians mocked the English for their poor pronunciation. By the 14th century, however, French was increasingly having to be formally taught, rather than being learnt naturally in the home, although the aristocracy would typically spend many years of their lives in France and remained entirely comfortable working in French.\n", "After the Norman conquest of England in 1066, Norman French became the official language used at court and by the nobles. Guernsey's Royal Court and officials employed standard French from the Medieval period to the mid 20th century.\n", "Since the Norman Conquest of England in 1066, English monarchs had held titles and lands within France, the possession of which made them vassals of the kings of France. The status of the English king's French fiefs was a major source of conflict between the two monarchies throughout the Middle Ages. Following a series of disagreements between Philip VI of France () and Edward III of England (), on 24 May 1337 Philip's Great Council in Paris agreed that the Duchy of Aquitaine, effectively Gascony, should be taken back into Philip's hands on the grounds that Edward was in breach of his obligations as a vassal. This marked the start of the Hundred Years' War, which was to last 116 years.\n", "The Normans and French who arrived after the conquest saw themselves as different from the English. They had close family and economic links to the Duchy of Normandy, spoke Norman French and had their own distinctive culture. For many years, to be English was to be associated with military failure and serfdom. During the twelfth century, the divisions between the English and Normans began to dissolve as a result of intermarriage and cohabitation. By the end of the twelfth century, and possibly as early as the 1150s, contemporary commentators believed the two peoples to be blending, and the loss of the Duchy in 1204 reinforced this trend. The resulting society still prized wider French cultural values, however, and French remained the language of the court, business and international affairs, even if Parisians mocked the English for their poor pronunciation. During the twelfth and thirteenth centuries, the English began to consider themselves superior to the Welsh, Scots and Bretons. The English perceived themselves as civilised, economically prosperous and properly Christian, while the Celtic fringe was considered lazy, barbarous and backward. Following the invasion of Ireland in the late twelfth century, similar feelings were expressed about the Irish.\n" ]
Will the phytoestrogens in soy products make it more difficult for a male to gain muscle mass?
Soy and phytoestrogens won't lower testosterone, but they do disrupt estrogen receptor activity. Males have estrogen receptors too, not just women, and side effects of higher estrogen levels in males can include gynecomastia. More information here: _URL_0_ TL;DR: avoiding soy due to phytoestrogens may be pragmatic, but not because it lowers testosterone, rather it's the effects on estrogen. [edit] Just wanted to add that the effects of soy consumption are generally overblown. Only individuals who are predisposed to gynecomastia or other complications need to be concerned, and even then only at rather large soy intakes consistently over time.
[ "BULLET::::- Soy products decrease sperm quality due to the high content of a type of phytoestrogen called isoflavones. Theoretically, this exposure to high levels of phytoestrogen in men may alter the hypothalamic-pituitary-gonadal axis. A few studies on animals have shown that such a hormonal effect may be significant and decrease fertility. On the other hand, most studies have shown that isoflavone supplements have little to no effect on sperm concentration, count, or mobility, and cause no changes in testicular or ejaculate volume.\n", "It is unclear if phytoestrogens have any effect on male sexuality, with conflicting results about the potential effects of isoflavones originating from soy. A 2010 meta-analysis of fifteen placebo-controlled studies said that \"neither soy foods nor isoflavone supplements alter measures of bioavailable testosterone concentrations in men.\" Some studies showed that isoflavone supplementation had no effect on sperm concentration, count, or motility, and had no effects on testicular or ejaculate volume. Sperm count decline and increasing rate of testicular cancers in the West may be linked to a higher presence of isoflavone phytoestrogens in the diet, but such a link has not been definitively proven. Furthermore, there is some evidence that phytoestrogens may affect male fertility, but \"further investigation is needed before a firm conclusion can be drawn\".\n", "Due to its progonadotropic effects in males, unlike CPA, cyproterone has been found, in male rodents, to increase testicular weight, increase the total number of type A spermatogonia, increase the total number of Sertoli cells, hyperstimulate the Leydig cells, and to have almost no effect on spermatogenesis. Conversely, it has also been reported for male rodents that spermiogenesis is inhibited and that accessory sexual gland weights (e.g., prostate gland, seminal vesicles) and fertility were markedly reduced, although with rapid recovery from the changes upon cessation of treatment. In any case, the medication is said to not be an effective antispermatogenic agent, whereas CPA is effective. Also unlike CPA, due to its lack of progestogenic and antigonadotropic activity, cyproterone does not suppress ovulation in women.\n", "A comparative study of the estrogenic properties of phytoestrogens found that both deoxymiroestrol and miroestrol were comparable in activity \"in vitro\" to other known phytoestrogens such as coumestrol as 17β-oestradiol agonists. Because of their estrogenic activities, miroestrol, deoxymiroestrol, and other related compounds have been the targets of scientific research including total synthesis.\n", "Some reviews have expressed the opinion that more research is needed to determine what effect the phytoestrogens in soybeans may have on infants. Diverse studies have concluded there are no adverse effects in human growth, development, or reproduction as a result of the consumption of soy-based infant formula. One of these studies, published in the \"Journal of Nutrition\", concludes that there are:\n", "Soybeans contain isoflavones called genistein and daidzein, which are one source of phytoestrogens in the human diet. Because most naturally occurring phytoestrogens act as selective estrogen receptor modulators, or SERMs, which do not necessarily act as direct agonists of estrogen receptors, normal consumption of foods that contain these phytoestrogens should not provide sufficient amounts to elicit a physiological response in humans.\n", "MK-0773 shows tissue-selective androgenic effects \"in vivo\" in animals. It increases lean body mass with maximal anabolic effects that are approximately 80% of those of dihydrotestosterone (DHT). However, it had less than 5% of the effect of DHT on uterine weight, about 30 to 50% of the increase of sebaceous gland area induced by DHT, and increased the weight of the seminal vesicles by 12% of that of DHT at the highest dosage assessed. It had similarly reduced effects on the prostate gland. No significant increase in gene expression of six candidate genes of virilization was observed. As such, MK-0773 shows a profile of an anabolic SARM with limited effects on sebaceous glands and reproductive tissues in animals and a minimal propensity for virilization.\n" ]
is the rothschilds networth an actual thing ? does this family actually control nearly all the wealth in the world? if not then why are they mentioned so much in online forums and blogs ?
They are rich, but the wealth has shrunk and divided with each other. No 1 member of the family owns it all anymore. As for the hate they often are tied into the conspiracies like the Rockefellers or other wealthy families from the Industrial Revolution. From Illuminati, New World Order, to Reptilian Aliens, the tinfoil hat wearers have pointed to them.
[ "While the Rothschild family rose to the status of the wealthiest family of bankers in the 19th century, their wealth was distributed among a number of family members, preventing them from appearing among the wealthiest individuals. The richest among the Rothschilds was the head of its English branch—Nathan Mayer Rothschild—the richest person of his time. Bernstein and Swan in \"All the Money in the World\" (2008) mention the top three richest Americans ever—all tycoons of the Gilded Age—respectively: John D. Rockefeller, Andrew Carnegie and Cornelius Vanderbilt; Henry Ford was ranked only 12th.\n", "The name of Rothschild became synonymous with extravagance and great wealth; and, the family was renowned for its art collecting, for its palaces, as well as for its philanthropy. By the end of the century, the family owned, or had built, at the lowest estimates, over 41 palaces, of a scale and luxury perhaps unparalleled even by the richest royal families. The British Chancellor of the Exchequer Lloyd George claimed, in 1909, that Nathan, Lord Rothschild was the most powerful man in Britain.\n", "The Rothschild family () is a wealthy Jewish family descending from Mayer Amschel Rothschild (1744–1812), a court factor to the German Landgraves of Hesse-Kassel in the Free City of Frankfurt, Holy Roman Empire, who established his banking business in the 1760s. Unlike most previous court factors, Rothschild managed to bequeath his wealth and established an international banking family through his five sons, who established themselves in London, Paris, Frankfurt, Vienna, and Naples. The family was elevated to noble rank in the Holy Roman Empire and the United Kingdom.\n", "The Rothschild family, as an example, established finance houses across Europe from the 18th century and was ennobled by the Habsburg Emperor and Queen Victoria. Throughout the 19th century, they controlled the largest fortune in the world, in today's terms many hundreds of billions. The family has, at least to some extent, maintained its wealth for over two centuries. The Rothschilds were not, however, considered \"old money\" by their British counterparts. In Britain, the term generally exclusively refers to the landed gentry, usually the aristocracy and nobility who traditionally live off the land inherited paternally. The British concept is analogous to good lineage and it is not uncommon to find someone with \"old money\" who is actually poor or insolvent. By 2001, however, those belonging to this category - the aristocratic landowners - are still part of the wealthiest list in the United Kingdom. For instance, the Duke of Westminster, by way of his Grosvenor estate, owns large swaths of properties in London that include 200 acres of Belgravia and 100 acres of Mayfair. There is also the case of Viscount Portman, who is the owner of 100 acres of land north of Oxford Street.\n", "During the 19th century, the Rothschild family possessed the largest private fortune in the world, as well as in modern world history. The family's wealth was divided among various descendants, and today their interests cover a diverse range of fields, including financial services, real estate, mining, energy, mixed farming, winemaking and nonprofits.\n", "Mayer Rothschild successfully kept the fortune in the family with carefully arranged marriages, often between first- or second-cousins (similar to royal intermarriage). By the late 19th century, however, almost all Rothschilds had started to marry outside the family, usually into the aristocracy or other financial dynasties.\n", "Since the late-19th century, the family has taken a low-key public profile, donating many famous estates, as well as vast quantities of art, to charity, and generally eschewing conspicuous displays of wealth. Today, Rothschild businesses are on a smaller scale than they were throughout the 19th century, although they encompass a diverse range of fields, including: real estate, financial services, mixed farming, energy, mining, winemaking and nonprofits.\n" ]
why is my laptop's time estimate of how much battery i have left always so incorrect?
1. There isn't a way for your laptop to tell exactly how much power is left in the battery. It has to estimate it by measuring how much power the battery is outputting, but that's not always a nice neat line. 2. There isn't any way for your laptop to know how much demand you're going to put on it. A laptop that's playing a high-graphics online game is using much more power than a laptop playing solitaire, and will therefore have much lower battery life.
[ "The Surface Laptop is the 5th addition to Surface lineup, following the Surface Pro, Surface Hub, Surface Book, and the Surface Studio. Unlike the other products, the Surface Laptop is aimed toward students. Microsoft claims a 14.5-hour battery life when running Windows 10 S, but testing suggests that the battery can be depleted to 50% in just 2.5 hours. It comes in four colors: Platinum, Graphite Gold, Burgundy, and Cobalt Blue as advertised.\n", "The high power consumption of the calculators, which drew 40 mA while in operation, four times the recommended limit of the batteries, meant a short battery life. \"Computer Digest\" recommended using a much larger PP9 battery, but that meant losing the portability of the calculator.\n", "2016-era laptops use lithium ion batteries, with some thinner models using the flatter lithium polymer technology. These two technologies have largely replaced the older nickel metal-hydride batteries. Battery life is highly variable by model and workload and can range from one hour to nearly a day. A battery's performance gradually decreases over time; substantial reduction in capacity is typically evident after one to three years of regular use, depending on the charging and discharging pattern and the design of the battery. Innovations in laptops and batteries have seen situations in which the battery can provide up to 24 hours of continued operation, assuming average power consumption levels. An example is the HP EliteBook 6930p when used with its ultra-capacity battery.\n", "Unlike previous versions of Windows, Windows 7 is able to report when a laptop battery is in need of a replacement. The operating system works with design capabilities present in modern laptop batteries to report this information.\n", "The display can be updated with a number of different kinds of information, such as contacts, maps, calendar, and email. This can then be consulted while the mobile PC is otherwise powered down. Since the underlying platform is so power-efficient, it can run for hundreds of hours without draining a notebook battery, while still providing always-on access to data and multimedia content.\n", "Battery life is limited because the capacity drops with time, eventually requiring replacement after as little as a year. A new battery typically stores enough energy to run the laptop for three to five hours, depending on usage, configuration, and power management settings. Yet, as it ages, the battery's energy storage will dissipate progressively until it lasts only a few minutes. The battery is often easily replaceable and a higher capacity model may be obtained for longer charging and discharging time. Some laptops (specifically ultrabooks) do not have the usual removable battery and have to be brought to the service center of its manufacturer or a third-party laptop service center to have its battery replaced. Replacement batteries can also be expensive.\n", "The battery life of the new models also received mixed reception, with outlets reporting inconsistent battery life and inaccurate estimates of time remaining on battery by the operating system. Apple addressed the latter by hiding the display of estimated battery time remaining entirely in a macOS update. \"Consumer Reports\" did not initially recommend the 2016 MacBook Pro models, citing inconsistent and unpredictable battery life in its lab testing (which involves the consecutive loading of multiple websites). However, Apple and \"Consumer Reports\" found that the results had been affected by a bug caused by disabling caching in Safari's developer tools. \"Consumer Reports\" performed the tests again with a patched macOS, and retracted its original assessment.\n" ]
When did Latin and Old French stop being mutually intelligible?
At the third Council of Tours, the priests were ordered to preach in vulgar Latin, as the common folk could no longer understand formal Latin. This was in 813 CE. While it may still have been Latin in name, this language would likely have been significantly different from the VL at the fall of the Western Roman Empire. Vulgar Latin, particularly in outlying regions of the former Roman Empire tended to be influenced by the local languages, as is usual. For instance, the formal Latin *equus* for horse was replaced by *caballus*, a word originating in the Gaulish tongue. The other major factor that would have changed in the intervening centuries between the fall of the Western Roman Empire and the Council of Tours is pronunciation. Old French in particular was guilty of significant vowel breaking - where a monopthong is broken into a dipthong or further e.g. the Latin short /e/ in *mel*, became /ie/ *miel*, or honey. Of the original dozen or so vowel sounds found in Latin, all were changed. Most significantly, vulgar Latin, and subsequently Old French placed more emphasis on stressed syllables, which tended to shift pronunciation and resulted in the now standard dropping of final letters when pronouncing French words. This shift lowered the morpheme:word ratio of OF/VL due to the end-conjugation of many Latin words. This meant that OF/VL relied significantly more on context that did formal Latin. From all this we have a date of certainty (813 CE), but indications exist that the loss of mutual intelligibility could have occurred significantly earlier, as language undergoes speciation in much the same way that living organisms do, on a continuum. EDIT: You might consider posting this same question over in /r/linguistics for a more in-depth response.
[ "Latin (which later developed into the brief-existent, little-known African Romance language) was the language of the Roman occupation; it became widely spoken in the coastal towns, and Augustine attests that in his day it was gaining ground over Punic. However, it gave way to Arabic and Berber after the Umayyads' conquest, leaving only a few loanwords in those two languages.\n", "During the 17th century, French replaced Latin as the most important language of diplomacy and international relations (lingua franca). It retained this role until approximately the middle of the 20th century, when it was replaced by English as the United States became the dominant global power following the Second World War. Stanley Meisler of the \"Los Angeles Times\" said that the fact that the Treaty of Versailles was written in English as well as French was the \"first diplomatic blow\" against the language.\n", "Latin was the official language of Hispania during the Rome's more than 600 years of rule, and by the empire's end in Hispania around 460 AD, all the original Iberian languages, except the ancestor of modern Basque, were extinct. Even after the fall of Rome and the invasion of the Germanic Visigoths and Suebi, Latin was spoken by nearly all of the population, but in its common form known as Vulgar Latin, and the regional changes which led to the modern Iberian Romance languages had already begun.\n", "Likewise, in the early 18th century, French replaced Latin as a diplomatic language, due to the commanding presence in Europe of the France of Louis XIV. At the same time, some (like King Frederick William I of Prussia) were dismissing Latin as a useless accomplishment, unfit for a man of practical affairs. The last international treaty to be written in Latin was the Treaty of Vienna in 1738; after the War of the Austrian Succession (1740–48) international diplomacy was conducted predominantly in French.\n", "Latin spoken in the context of Gallo-Romance and French from approximately the 6th to the 11th-12th centuries. During this period, Latin became a primarily written language, separated from the ordinary spoken language of the people. While it escaped many of the changes of pronunciation and grammar of Gallo-Romance, it did share a few of the changes of the spoken language. This was for the most part a period of stability.\n", "and German, the modern languages most widely learned in schools around the world at the time Esperanto was devised. The result was that about two-thirds of this original vocabulary is Romance, and about one-third Germanic, including a pair of roots from Swedish:\n", "The Vulgar Latin underlying French and most other Romance languages had seven vowels in stressed syllables (, similar to the vowels of American English \"khat pet pate peat caught coat coot\" respectively), and five in unstressed syllables (). Portuguese and Italian largely preserve this system, while Spanish has innovated only in converting to and to , resulting in a simple five-vowel system . In French, however, numerous sound changes resulted in a system with 12-14 oral vowels and 3-4 nasal vowels (see French phonology).\n" ]
shouldn't things like the "law of gravity" or the "laws of thermodynamics" correctly be called "theories" instead?
The scientific laws are generally just observations, not theories. The law of gravity doesnt explain gravity, it just describes it - whereas the theory of general relativity provides a model for how gravity works within the bounds of spacetime
[ "The term scientific theory is reserved for concepts that are widely accepted. A scientific law often refers to regularities that can be expressed by a mathematical statement. However, there is no consensus about the distinction between these terms. Every scientific concept must have an operational definition, however the operational definition can use both direct observations and latent variables.\n", "In 2009, Verlinde showed that the laws of gravity may be derived by assuming a form of the holographic principle and the laws of thermodynamics. This may imply that gravity is not a true fundamental force of nature (like e.g. electromagnetism), but instead is a consequence of the universe striving to maximize entropy.\n", "The term \"scientific law\" is traditionally associated with the natural sciences, though the social sciences also contain laws. For example, Zipf's law is a law in the social sciences which is based on mathematical statistics. In these cases, laws may describe general trends or expected behaviors rather than being absolutes.\n", "Physicist Paul Davies of Arizona State University has written that the very notion of physical law is a theological one in the first place: \"Isaac Newton first got the idea of absolute, universal, perfect, immutable laws from the Christian doctrine that God created the world and ordered it in a rational way\". John Lennox has argued that science itself sits more comfortably with theism than with atheism and \"as a scientist I would say... where did modern science come from? It didn't come from atheism... modern science arose in the 16th and 17th centuries in Western Europe, and of course people ask why did it happen there and then, and the general consensus which is often called Merton's Thesis is, to quote CS Lewis who formulated it better than anybody I know... 'Men became scientific. Why? Because they expected law in nature, and they expected law in nature because they believed in a lawgiver.' In other words, it was belief in God that was the motor that drove modern science\".\n", "The consideration that laws in physics may not be absolute but relative, and, if so, this might be more true of social sciences, was stated, in different terms, by G. B. Vico in 1725. Vico, in contrast to the positivist movement, asserted the superiority of the science of the human mind (the humanities, in other words), on the grounds that natural sciences tell us nothing about the inward aspects of things.\n", "Unlike \"law fundamentalists\", some philosophers are \"law pluralists\": they question what it means to have a law of physics. One example is the \"Best Standards Analysis\", which says that the laws are only useful ways to summarize all past events, rather than there being metaphysically \"pushy\" entities (this route still brings one into conflict with the idea of free will). Some law pluralists further believe there are simply no laws of physics. The mathematical universe hypothesis suggests that there are other universes in which the laws of physics and fundamental constants are different. Andreas Albrecht of Imperial College in London called it a \"provocative\" solution to one of the central problems facing physics. Although he \"wouldn't dare\" go so far as to say he believes it, he noted that \"it's actually quite difficult to construct a theory where everything we see is all there is\".\n", "Causality in this context should not be confused with Newton's second law, which is related to the conservation of momentum, and is a consequence of the spatial homogeneity of physical laws. The word causality in this context means that all effects must have specific causes. As discussed below, this is a principle that is violated in some theories of modern physics.\n" ]
the difference between plasma and the ‘other’ states
Unlike gases, plasmas are made up of atoms in which some or all of the electrons have been stripped away, leaving positively charged nuclei, called ions, roam freely.
[ "Plasma is often called the \"fourth state of matter\" after solid, liquids and gases, despite plasma typically being an ionized gas. It is distinct from these and other lower-energy states of matter. Although it is closely related to the gas phase in that it also has no definite form or volume, it differs in a number of ways, including the following:\n", "Plasma is often called the \"fourth state of matter\" after solid, liquids and gases. It is distinct from these and other lower-energy states of matter. Although it is closely related to the gas phase in that it also has no definite form or volume, it differs in a number of ways, including the following:\n", "Plasma is a state of matter in which an ionized gaseous substance becomes highly electrically conductive to the point that long-range electric and magnetic fields dominate the behaviour of the matter. The plasma state can be contrasted with the other states: solid, liquid, and gas.\n", "Plasma and ionized gases have properties and display behaviours unlike those of the other states, and the transition between them is mostly a matter of nomenclature and subject to interpretation. Based on the surrounding environmental temperature and density, partially ionized or fully ionized forms of plasma may be produced. Neon signs and lightning are examples of partially ionized plasma. The Earth's ionosphere is a plasma and the magnetosphere contains plasma in the Earth's surrounding space environment. The interior of the Sun is an example of fully ionized plasma, along with the solar corona and stars.\n", "There are 4 states of matter: solid, liquid, gas, and plasma. Plasmas make up more than 99% of the visible universe. In general, when energy is applied to a gas, internal electrons of gas molecules (atoms) are excited and move up to higher energy levels. If the energy applied is high enough, outermost electron(s) can even be stripped off the molecules (atoms), forming ions. Electrons, molecules (atoms), excited species and ions form a soup of species which involves many interactions between species and demonstrate collective behavior under the influence of external electric and magnetic fields. Light always accompanies plasmas: as the excited species relax and move to lower energy levels, energy is released in the form of light. Microplasma is a subdivision of plasma in which the dimensions of the plasma can range between tens, hundreds, or even thousands of micrometers in size. The majority of microplasmas that are employed in commercial applications are cold plasmas. In a cold plasma, electrons have much higher energy than the accompanying ions and neutrals. Microplasmas are typically generated at elevated pressure to atmospheric pressure or higher.\n", "The plasma state is often misunderstood, and although not freely existing under normal conditions on Earth, it is quite commonly generated by either lightning, electric sparks, fluorescent lights, neon lights or in plasma televisions. The Sun's corona, some types of flame, and stars are all examples of illuminated matter in the plasma state.\n", "Plasma is the state of matter where some of the electrons in a gas are stripped or \"ionized\" from their molecules or atoms. A plasma can be formed by high temperature, or by application of a high electric or alternating magnetic field as noted above. Due to their lower mass, the electrons in a plasma accelerate more quickly in response to an electric field than the heavier positive ions, and hence carry the bulk of the current. The free ions recombine to create new chemical compounds (for example, breaking atmospheric oxygen into single oxygen [O → 2O], which then recombine creating ozone [O]).\n" ]
How long would it take a quantum computer (theoretically) to make as many computations as has been made in the entire history of computers?
Quantum computers aren't magical. They cannot perform arbitrary computations faster than classical computers can. They can solve *certain* problems faster (for example, [brute-force search](_URL_0_)). You might have gotten the wrong impression from pop science articles that claim that quantum computers somehow perform billions of simultaneous computations, etc., which is very misleading.
[ "In September 2012, Australian researchers at the University of New South Wales said the world's first quantum computer was just 5 to 10 years away, after announcing a global breakthrough enabling the manufacture of its memory building blocks. A research team led by Australian engineers created the first working qubit based on a single atom in silicon, invoking the same technological platform that forms the building blocks of modern-day computers.\n", "The idea that quantum computers might be more powerful than classical computers originated in Richard Feynman's observation that classical computers seem to require exponential time to simulate many-particle quantum systems. Since then, the idea that quantum computers can simulate quantum physical processes exponentially faster than classical computers has been greatly fleshed out and elaborated. Efficient (that is, polynomial-time) quantum algorithms have been developed for simulating both Bosonic and Fermionic systems and in particular, the simulation of chemical reactions beyond the capabilities of current classical supercomputers requires only a few hundred qubits. Quantum computers can also efficiently simulate topological quantum field theories. In addition to its intrinsic interest, this result has led to efficient quantum algorithms for estimating quantum topological invariants such as Jones and HOMFLY polynomials, and the Turaev-Viro invariant of three-dimensional manifolds.\n", "By 1971, the Illiac IV supercomputer was the fastest computer in the world, using about a quarter-million small-scale ECL logic gate integrated circuits to make up sixty-four parallel data processors.\n", "The first quantum machine was created on August 4, 2009 by Aaron D. O'Connell while pursuing his Ph.D. under the direction of Andrew N. Cleland and John M. Martinis at the University of California, Santa Barbara. O'Connell and his colleagues coupled together a mechanical resonator, similar to a tiny springboard, and a qubit, a device that can be in a superposition of two quantum states at the same time. They were able to make the resonator vibrate a small amount and a large amount simultaneously—an effect which would be impossible in classical physics. The mechanical resonator was just large enough to see with the naked eye—about as long as the width of a human hair.\n", "In 1994, Peter Shor, at AT&T's Bell Labs, discovered an important quantum algorithm, which allows a quantum computer to factor large integers exponentially much faster than the best known classical algorithm. Shor's algorithm can theoretically break many of the Public-key cryptography systems in use today, sparking a tremendous interest in quantum computers.\n", "The CDC 6600, designed by Seymour Cray, was finished in 1964 and marked the transition from germanium to silicon transistors. Silicon transistors could run faster and the overheating problem was solved by introducing refrigeration to the supercomputer design. Thus the CDC6600 became the fastest computer in the world. Given that the 6600 outperformed all the other contemporary computers by about 10 times, it was dubbed a \"supercomputer\" and defined the supercomputing market, when one hundred computers were sold at $8 million each.\n", "In 2007, a team of scientists led by Schoelkopf and Steven Girvin made a major breakthrough in quantum computing when it engineered a superconducting communication \"bus\" to store and transfer information between distant quantum bits, or qubits, on a chip. Their work is the first step to making the fundamentals of quantum computing useful. In 2009, their team demonstrated the first electronic quantum processor which could perform a quantum computation.\n" ]
given the emphasis placed on the separation of the three pillars of the american government, how can the president grant pardons? is this not the executive messing with the judiciary?
If all that was said was "Congress makes laws; President enforces laws; Judges interpret laws," then maybe. But the President has the explicit power in the Constitution to pardon people. You might think that invades the province of the judiciary, but it's granted authority so no one has a real issue with it.
[ "Notwithstanding their executive power, the president cannot make treaties or appointments without the advice and consent of the Senate. Likewise, the president's pardon power is limited to offenses against the United States (federal crimes) and does not extend to impeachments or violations of state law. As treaties are by U.S. law official agreements with foreign governments recognized as such only after Senate ratification, the president obviously cannot make treaties unilaterally. However, the president does determine and decide U.S. foreign policy, and can enter into non-binding discussions and give conditional approval to agreements reached with foreign governments subject to Senate ratification at a future date.\n", "Article II of the Constitution establishes the executive branch of the federal government. It vests the executive power of the United States in the president. The power includes the execution and enforcement of federal law, alongside the responsibility of appointing federal executive, diplomatic, regulatory and judicial officers, and concluding treaties with foreign powers with the advice and consent of the Senate. The president is further empowered to grant federal pardons and reprieves, and to convene and adjourn either or both houses of Congress under extraordinary circumstances. The president directs the foreign and domestic policies of the United States, and takes an active role in promoting his policy priorities to members of Congress. In addition, as part of the system of checks and balances, of the Constitution gives the president the power to sign or veto federal legislation. The power of the presidency has grown substantially since its formation, as has the power of the federal government as a whole.\n", "To refute the notion that the executive branch would become a monarchy, allowing the President to put a person in any office, Hamilton wrote, \"To nominate, and by and with the advice and consent of the Senate, to appoint ambassadors, other public ministers and consuls, judges of the Supreme Court, and all other officers of United States whose appointments are not in the Constitution otherwise provided for, and which shall be established by law.\" What this statement means is that the President of the United States can only nominate members as ambassadors, public ministries and consuls, Supreme Court judges and any other member that is not directly named in the Constitution currently or that will be named in the future without first consulting the Senate and then getting the Senate's approval of his nomination.\n", "The president, as noted above, appoints judges with the Senate's advice and consent. He also has the power to issue pardons and reprieves. Such pardons are not subject to confirmation by either the House of Representatives or the Senate, or even to acceptance by the recipient. The President is not mandated to carry out the orders of the Supreme Court. The Supreme Court does not have any enforcement power; the enforcement power lies solely with the executive branch. Thus, the executive branch can place a check on the Supreme Court through refusal to execute the orders of the court. For example, in \"Worcester v. Georgia\", President Jackson refused to execute the orders of the Supreme Court.\n", "The Supreme Executive Power was commissioned to direct the former provinces, now Free States, to create the Federal Republic and also to call elections for a new constituent congress. The Executive had to overcome a series of political difficulties, such as the case of the Central American provinces that chose not to join Mexican Federation, and the provinces of Oaxaca, Yucatán, Jalisco and Zacatecas that declared themselves free and sovereign states. They also faced a conspiracy of supporters of Iturbide and an anti-Spanish rebellion.\n", "Article 19 of the Federal Constitutional Law, the backbone of the constitution, empowers the National Council to enact incompatibility provisions that bar presidents, ministers, and members of provincial governments from holding positions in the private sector during their time in office. In its first sentence, Article 19 states that \"the supreme executive organs are the president, the ministers and state secretaries, and the members of the provincial governments\" (\"\").\n", "In the 1926 case of \"Myers v. United States\", the United States Supreme Court decided that the President has the exclusive power to remove executive branch officials, and does not need the approval of the Senate or any other legislative body. The Court also wrote:\n" ]
what do large corporation do with billions of dollars in revenue after expenses? do they spend it all on assets or can they get a bank account like people?
All of the above. After paying out expenses. And stockholders fees. And bonuses to management. They will invest in research and development. Donate to causes, mainly for tax write-off. Funnel money into politics through lobbyists, for power and control. They will buy smaller business, and newer technology and inventions so they can do hold the patents and collect money on that. Invest in upgrading and expanding properties that they own. And invest in accounts that will earn them money, and while they search for new acquisitions.
[ "The majority of company's income comes from management fees, dividends and revenue from part sales of businesses. To this day assets after loans owned by the company both directly and through its affiliates, related or associated companies are valued at nearly 120 million euros.\n", "The company has reported annual profits since 2010. It can carry forward previous losses to reduce tax liability on future earnings. It earned $4.7 billion in 2010. The \"Wall Street Journal\" estimated the tax break, including credits for costs related to pensions and other expenses, can be worth as much as $45 billion over the next 20 years.\n", "A company's taxable total profits are derived from a company's profit as shown in the profit and loss account in its accounts, with the addition of any disallowed expenditure, and the deduction of any expenditure that is allowed for tax purposes but that has not been deducted in the profit and loss account.\n", "Money income from activities that is ordinary for a particular corporation, company, partnership, or sole-proprietorship. For some businesses, such as manufacturing or grocery, most revenue is from the sale of goods. Service businesses such as law firms and barber shops receive most of their revenue from rendering services. Lending businesses such as car rentals and banks receive most of their revenue from fees and interest generated by lending assets to other organizations or individuals.\n", "In corporations that derive much of their profits from the information economy, such as banks, publishing houses, telecommunications companies and defence contractors, IT costs are a significant source of uncontrollable spending, which in size is often the greatest corporate cost after total compensation costs and property related costs. A function of management accounting in such organizations is to work closely with the IT department to provide IT cost transparency.\n", "Interest earned is the income for the corporation, this should payments, the entire expenses and plough back requirement therefore, recovery of money is one of the major source of funds for the corporation. The health of the corporation is judged by the extent of recovery that it can affect. All source of funds carry cost, if the cost of borrowings is higher, it reduces the margin profit, further the profit are subject to payment of income tax as per applicable laws. The corporation also is bound by minimum dividend obligation irrespective, whether it makes profit or not out of the post tax and post dividend income. The memos are retained in the corporation by way of reserves. Plough back of funds into system is emerging as one of the very important sources of funds in the total resource mix, if the corporation has to retain sufficient money for the business operations; it has to generate more income. More income obviously improving the recovery. Therefore, systematic follow-up recovery of loan plays a significant role in our operations. In fact, is not exaggeration of the state that effective recovery of loans is the backbone\n", "A company is normally subject to a company tax on the net income of the company in a financial year. The amount added to retained earnings is generally the after tax net income. In most cases in most jurisdictions no tax is payable on the accumulated earnings retained by a company. However, this creates a potential for tax avoidance, because the corporate tax rate is usually lower than the higher marginal rates for some individual taxpayers. Higher income taxpayers could \"park\" income inside a private company instead of being paid out as a dividend and then taxed at the individual rates. To remove this tax benefit, some jurisdictions impose an \"undistributed profits tax\" on retained earnings of private companies, usually at the highest individual marginal tax rate.\n" ]
how is it possible that isp's can see what your up to online? i thought https encrypted your traffic so it can't be read?
Sorta. The ISP is your mailman. They need to get packages to where they need to go, Reddit for example is sending you a package containing this reply. You pay the mailman monthly for a rate at which they send packages from you and to you. HTTPS encrypts the package’s contents, however the ISP’s responsibility is still to move the package from A to B, and therefore needs to know what these A and B are. Therefore the postage address cannot be encrypted, and your ISP can track who you are exchanging packages with, be it Reddit or YouTube or Netflix. So your ISP can’t actually see what you are viewing on Reddit, YouTube, or Netflix, but they can see which sites you are accessing.
[ "An ISP cannot know the contents of properly-encrypted data passing between its consumers and the Internet. For encrypting web traffic, https has become the most popular and best-supported standard. Even if users encrypt the data, the ISP still knows the IP addresses of the sender and of the recipient. (However, see the IP addresses section for workarounds.)\n", "HTTPS encrypts all message contents, including the HTTP headers and the request/response data. With the exception of the possible CCA cryptographic attack described in the limitations section below, an attacker should only be able to discover that a connection is taking place between the two parties and their domain names and IP addresses.\n", "BULLET::::- \"Security\": It is important to make sure that HTTPS is used when communicating with the web application server. Otherwise all data being sent would be readable by use of simple packet sniffers which could reveal sensitive information.\n", "Web browsers typically use HTTP to communicate with web servers, sending and receiving information without encrypting it. For sensitive transactions, such as Internet e-commerce or online access to financial accounts, the browser and server must encrypt this information.\n", "This issue can be resolved by securing the communication between the user's computer and the server by employing Transport Layer Security (HTTPS protocol) to encrypt the connection. A server can specify the codice_4 flag while setting a cookie, which will cause the browser to send the cookie only over an encrypted channel, such as an TLS connection.\n", "BULLET::::- Public or Private tracker websites have selectively switched over to using HTTPS for the distribution of their web text and image content. By using HTTPS for the website content (versus tracker communications) many poisoning techniques are rendered impossible.\n", "For encrypting WWW/HTTP connections, HTTPS is typically used, which requires strict encryption and has significant administrative costs, both in terms of initial setup and continued maintenance costs for the website operator. Most browsers verify the webserver's identity to make sure that an SSL certificate is signed by a trusted certificate authority and has not expired, usually requiring the website operator to manually change the certificate every one or two years. The easiest way to enable some sort of opportunistic website encryption is by using self-signed certificates, but this causes browsers to display a warning each time the website is visited unless the user manually marks the website's certificate as trusted. Because unencrypted websites do not currently display any such warnings, the use of self-signed certificates is not well received.\n" ]
why does anybody in this day and age like the royal family? what good have they managed?
This is going to be mostly an opinionated thread; but there are three possible explanations: 1) They aren't- Taking this from the "Ask British people" threads that pop up, attitudes from even the Brits range from 'they suck' to 'who cares'. 2) They're figureheads for a strong nation- A lot of people respect Heads of States: they're your nations public face for the world. The Queen may not have a whole lot of actual power but she represents a nation that was once arguably the strongest in the world. And this next caveat is important: Britain has been replaced in the "Evil Empire" light by Russia and the U.S. Enough time has passed since they were the predominant superpower that people still respect them for their might but forget a lot of the bad they did in that span of time. 3) It's romantic- Not in a bad way; but a lot of us grow up on fantasy stories about Knights and Kings and Queens. A lot of movies even use England as backdrop for these stories so there's a positive correlation there. Again, your mileage may vary in this thread and each individual person will have a different answer, but I hope that clears some things up.
[ "The Royal Households of the United Kingdom are the collective departments which support members of the British royal family. Many members of the Royal Family who undertake public duties have separate households. They vary considerably in size, from the large Royal Household which supports the Sovereign to the household of the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex, with fewer than ten members. The lesser households are funded from the Civil List annuities, paid to their respective royal employers for their public duties, and all reimbursed to HM Treasury by the Queen.\n", "The family has many links to royal and aristocratic families across Europe as well as other powerful leading families within Europe. The family is considered to be one of the most historically important, old, and powerful aristocratic families in Europe. \n", "The family has many links to royal and aristocratic families across Europe as well as other powerful leading families within Europe. The family is considered as one of the most historically important, old, and powerful aristocratic families in Europe. \n", "One of the classic examples of family traditions of the modern era is the family traditions of the present royal family of Great Britain. One of such family traditions enjoin upon male members of the present British royal family to serve in the armed forces. A BBC report has announced on 12 June 2003 that “Prince Harry’s decision to join the Army means he will follow a long family tradition of serving the military.” Before him, his uncle, Prince Andrew, had joined the Navy in 1979. Prince Harry’s other uncle, Prince Edward had joined the Royal Marines as a second lieutenant in 1983. Prince Harry’s father, the Prince of Wales, was appointed in 1969 as colonel-in-chief of the Royal Regiment of Wales. Harry’s grandfather, the Duke of Edinburgh, had joined the Navy in 1939, and had also served in the World War II.\n", "The family, originally small in number, grew considerably, which led to divisions of material wealth but enhanced political influence, due to having the support of more people in the Sejms, in the Senate, or at the royal court. Members of the family were able to count on the support of their relatives in political or court activities.\n", "Family members are one of the most important careproviders in the life of an elderly. In fact, the majority of caregivers for the elderly are often members of their own family, most often a daughter or a granddaughter. Family and friends can provide a home (i.e. have elderly relatives live with them), help with money and meet social needs by visiting, taking them out on trips, etc.\n", "The Royal Family traditionally had its members serve in the Armed Forces, usually with the Royal Navy though many have served with the Army. This occasionally warped operations in the field, for example at the Battle of Tel el-Kebir, where Wolseley was forced to leave an entire brigade of Guards in reserve to avoid harm coming to Queen Victoria's third son, the Duke of Connaught. The tradition has continued into the 21st century, with Prince Harry and Prince William both joining the Army as officers. However, Royals are no longer deliberately kept out of harm's way; Prince Harry saw active service in Afghanistan until the publicity posed a threat to the troops serving with him, while Prince Andrew served as a front-line helicopter pilot with the Royal Navy during the Falklands War.\n" ]
what is happening in brazil, with all these big rallies taking place?
tldr, ex-President is involved in a giant corruption investigation and was just appointed the Chief of Staff by the current President in an attempt to shield him from prosecutions (in Brazil, ministers are to be judged by the Supreme Court, which comprise mostly of people picked by the acting party), thus the huge protests Edit: fixed stuff in brackets
[ "Protests across Brazil have drawn millions to the streets in a wave of rolling fury that became the biggest demonstrations in decades. A young man was killed in Ribeirão Preto during the protest when a driver ploughed through a peaceful demonstration, also injuring 11 other people. President Dilma Rousseff addressed the nation, recognizing the demands of the protesters and calling a meeting of state governors and mayors of key cities to discuss the requests of the population and propose solutions to solve the issues.\n", "On 31 March 2017, a series of protests began in Paraguay, during which demonstrators set fire to the Congress building. The demonstrations occurred in response to a constitutional amendment that would permit President Horacio Cartes to run for re-election, a move described by the opposition as \"a coup\". One protester was killed in Paraguay's capital, Asunción, after being hit by a shotgun blast by police. Several protesters, politicians and journalists, as well as police, were reported injured, including one lower-house deputy who had to undergo surgery after being injured by rubber bullets. On 17 April, President Cartes announced that he was resigning from any possible candidacy for a second presidential term. On 26 April, the Chamber of Deputies of Paraguay rejected the proposed constitutional amendment for presidential re-election.\n", "The demonstrations were initially organized to protest against increases in bus, train, and metro ticket prices in some Brazilian cities, but grew to include other issues such as the high corruption in the government and police brutality used against some demonstrators. By mid-June, the movement had grown to become Brazil's largest since the 1992 protests against former President Fernando Collor de Mello.\n", "The 2014 unrest in Bosnia and Herzegovina was a series of demonstrations and riots that began in the northern town of Tuzla on 4 February 2014, but quickly spread to multiple cities in Bosnia and Herzegovina, including Sarajevo, Zenica, Mostar, Jajce, and Brčko, among others, for social reasons and with the aim of overthrowing the government. The riots were the most violent scenes the country had seen since the end of the Bosnian War in 1995. The rioting largely took place in the entity of Federation of Bosnia and Herzegovina, and the same level of unrest or activism did not occur in Republika Srpska.\n", "According to an article by Fabíola Ortiz on March 25 on the online magazine \"Upside Down World\", two small protests were organized in Brazil against the decision for military intervention in Libya. On March 18, during the visit of Barack Obama to Brazil, a protest of about 200 people from social movements, the Workers' Party, the Brazilian Communist Party and the Democratic Labour Party was held in Rio de Janeiro. The demonstration was peaceful until it reached the U.S. consulate, when two molotov cocktails were thrown (injuring the building's security guard). The Military Police reacted by firing rubber bullets into the gathering, hurting a Rádio CBN reporter. Fourteen protestors were arrested.\n", "BULLET::::- 2014 – 2014 unrest in Bosnia and Herzegovina The 2014 unrest in Bosnia and Herzegovina is a series of demonstrations and riots that began in the northern town of Tuzla on February 4, 2014, but quickly spread to multiple cities in Bosnia and Herzegovina, including Sarajevo, Zenica, Mostar.\n", "The 2013 protests in Brazil (also known as the V for Vinegar Movement,[5] Salad Revolt, Vinegar Revolt, Come to the street and Brazilian Spring) are ongoing public demonstrations in several Brazilian cities, initiated mainly by the Movimento Passe Livre (Free Fare Movement), a local entity that advocates for free public transportation. The most recent movement being \"Ocupe Estelita\" in Recife, Pernambuco which is focused on the demolition of an historical part of the city to make way for high-priced housing and leisure facilities.\n" ]
How mixable are different types of plastic? Like PET and HDPE?
Some polymers have an affinity for each other and mix well. Polycarbonate, some styrene copolymers, and PET Mix well. This is driven by the chemical structure. Think that some are more polar, water like and others are less polar or oil like. However most polymers by themselves are typically not mixable. When mixed they form a blend that has poor adhesion and thus poor strength. it only takes a small amount of incompatible polymer in a mixture to make the material useless. Which is why it is important to have clean recycle streams. The outcome of a good mixture is to get desirable properties of both materials in a single material. For example high temp stiffness with rubber impact resistance. To make them mixable the two polymers are typically reacted to together to form a copolymer that acts as a soap allowing them to mix. ABS ( LEGO plastic) is a mixture of polybutadiene (rubber) and Styrene-acrylonitrile copolymers. The rubber provides break resistance while the styrene copolymers provide stiffness. Super tough nylon ( weed whacker string) is a mixture of nylon with ethylene-propylene rubbers that contain an acid group that reacts with the nylon’s amino group to form the copolymer. There is a whole industry that tries to figure this out.
[ "Some familiar household synthetic polymers include: Nylons in textiles and fabrics, Teflon in non-stick pans, Bakelite for electrical switches, polyvinyl chloride (PVC) in pipes, etc. The common PET bottles are made of a synthetic polymer, polyethylene terephthalate. The plastic kits and covers are mostly made of synthetic polymers like polythene and tires are manufactured from Buna rubbers. However, due to the environmental issues created by these synthetic polymers which are mostly non-biodegradable and often synthesized from petroleum, alternatives like bioplastics are also being considered. They are however expensive when compared to the synthetic polymers.\n", "Production of plastics for use in the industrial sector around the world makes up a very large market. PET (polyethylene terephthalate) is one of the dominant plastics within this market. It is commonly used for bottles because it makes a rigid container that is very lightweight. However, because of the stability of PET, it is also highly resistant to biodegradation, posing a significant environmental problem because of the amount of PET produced, sold, used and thrown away on a daily basis. An estimated 30% of the world production of PET goes into making these plastic bottles and only from 15% to 35% ends up being recycled; the rest usually end up in a landfill. This has stimulated research into polymers that function comparably to PET, but are biodegradable.\n", "The majority of the world's PET production is for synthetic fibres (in excess of 60%), with bottle production accounting for about 30% of global demand. In the context of textile applications, PET is referred to by its common name, polyester, whereas the acronym \"PET\" is generally used in relation to packaging. Polyester makes up about 18% of world polymer production and is the fourth-most-produced polymer after polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC).\n", "Plastic pallets are produced and used widely in the U.S. and Europe, spurred by the adoption of the ISPM 15. A full comparison of wood vs plastic can be made by a life cycle analysis. Plastic pallets can cost 10 times as much as hardwood pallets and even more expensive compared to cheap expendable softwood pallets. RFID chips can be molded into the pallets to monitor locations and track inventory.\n", "There are a variety of different discs, each with a specific plastic made with them. Plastics such as DX, J-Pro, Pro-D, X-Line, D-line, retro, and R-Pro from Innova discs, latitude 64, discmania, and Discraft are some of the less durable plastics, but good for beginners due to their lower prices, compared to the higher end plastics. Plastics such as Champion, Titanium, FLX, GStar, Gold Line, Tournament Plastic, Fuzion and Star plastics, which are the best offered from the same companies, offering the best quality, durability and flight compared to the other types available. There are also plastics that provide additional functionality, specifically glow in the dark plastic and plastic that allows the disc to float in water. Most companies also offer a line of plastic that is much lighter than the maximum throwing weight (normally filled with air bubbles) which is conducive to beginners or players with less arm speed. Players might prefer bright colored discs to contrast most green flora and recover their disc easier.\n", "PET is used as a raw material for making packaging materials such as bottles and containers for packaging a wide range of food products and other consumer goods. Examples include soft drinks, alcoholic beverages, detergents, cosmetics, pharmaceutical products and edible oils. PET is one of the most common consumer plastics used. Polyethylene terephthalate can also be used as the main material in making water-resistant paper.\n", "Plasticizers (UK: plasticisers) or dispersants are additives that increase the plasticity or decrease the viscosity of a material. These are the substances which are added in order to alter their physical properties. These are either liquids with low volatility or solids. They decrease the attraction between polymer chains to make them more flexible. Over the last 60 years more than 30,000 different substances have been evaluated for their plasticizing properties. Of these, only a small number – approximately 50 – are today in commercial use. The dominant applications are for plastics, especially polyvinyl chloride (PVC). The properties of other materials may also be modified when blended with plasticizers including concrete, clays, and related products. According to 2014 data, the total global market for plasticizers was 8.4 million metric tonnes including 1.3 million metric tonnes in Europe.\n" ]
what force is stronger than electromagnetism, if any, and what makes it stronger?
The nuclear strong force is the strongest of the four fundamental forces. This is the force that holds quarks together inside protons and neutrons, and protons and neutrons together inside atomic nuclei. However, it has an extremely small range, and drops off to almost non existent levels over only the distance of a single proton. In terms of *why* it's stronger, there's no fundamental physical reason for this that we're aware of. The strengths of the four forces are just physical constants of this Universe, and could quite easily have been different. It's just the way the proverbial cookie crumbled in the case of our Universe.
[ "Even though electrostatically induced forces seem to be rather weak, some electrostatic forces such as the one between an electron and a proton, that together make up a hydrogen atom, is about 36 orders of magnitude stronger than the gravitational force acting between them.\n", "BULLET::::- It is already known that electromagnetism and the weak nuclear force are different manifestations of a single force called the electroweak force. The LHC may clarify whether the electroweak force and the strong nuclear force are similarly just different manifestations of one universal unified force, as predicted by various Grand Unification Theories.\n", "The force acts on the charged particles themselves, hence charge has a tendency to spread itself as evenly as possible over a conducting surface. The magnitude of the electromagnetic force, whether attractive or repulsive, is given by Coulomb's law, which relates the force to the product of the charges and has an inverse-square relation to the distance between them. The electromagnetic force is very strong, second only in strength to the strong interaction, but unlike that force it operates over all distances. In comparison with the much weaker gravitational force, the electromagnetic force pushing two electrons apart is 10 times that of the gravitational attraction pulling them together.\n", "In particle physics, the strong interaction is the mechanism responsible for the strong nuclear force (also called the strong force, nuclear strong force, or colour force), and is one of the four known fundamental interactions, with the others being electromagnetism, the weak interaction, and gravitation. At the range of 10 m (1 femtometer), the strong force is approximately 137 times as strong as electromagnetism, a million times as strong as the weak interaction, and 10 (100 undecillion) times as strong as gravitation. The strong nuclear force holds most ordinary matter together because it confines quarks into hadron particles such as the proton and neutron. In addition, the strong force binds neutrons and protons to create atomic nuclei. Most of the mass of a common proton or neutron is the result of the strong force field energy; the individual quarks provide only about 1% of the mass of a proton.\n", "Electromagnetism and weak interaction appear to be very different at everyday low energies. They can be modelled using two different theories. However, above unification energy, on the order of 100 GeV, they would merge into a single electroweak force.\n", "Even though electromagnetism is far stronger than gravitation, electrostatic attraction is not relevant for large celestial bodies, such as planets, stars, and galaxies, simply because such bodies contain equal numbers of protons and electrons and so have a net electric charge of zero. Nothing \"cancels\" gravity, since it is only attractive, unlike electric forces which can be attractive or repulsive. On the other hand, all objects having mass are subject to the gravitational force, which only attracts. Therefore, only gravitation matters on the large-scale structure of the universe.\n", "Although the weak and electromagnetic forces appear quite different to us at everyday energies, the two forces are theorized to unify as a single electroweak force at high energies. This prediction was clearly confirmed by measurements of cross-sections for high-energy electron-proton scattering at the HERA collider at DESY. The differences at low energies is a consequence of the high masses of the \"W\" and \"Z\" bosons, which in turn are a consequence of the Higgs mechanism. Through the process of spontaneous symmetry breaking, the Higgs selects a special direction in electroweak space that causes three electroweak particles to become very heavy (the weak bosons) and one to remain with an undefined rest mass as it is always in motion (the photon). On 4 July 2012, after many years of experimentally searching for evidence of its existence, the Higgs boson was announced to have been observed at CERN's Large Hadron Collider. Peter Higgs who first posited the existence of the Higgs boson was present at the announcement. The Higgs boson is believed to have a mass of approximately 125 GeV. The statistical significance of this discovery was reported as 5-sigma, which implies a certainty of roughly 99.99994%. In particle physics, this is the level of significance required to officially label experimental observations as a discovery. Research into the properties of the newly discovered particle continues.\n" ]
What would happen if the superheated material inside a fusion reactor was exposed?
Essentially the same as with any superheated material breaking out of containment. The reactor and surrounding structure might be damaged or destroyed. The amount of damage will depend on the size of the reactor and the materials used. Depending on the type of fusion taking place, there may be free neutrons flying around that can be a source of radioactivity, but these neutrons won't travel far. Once the containment is breached, the fusion plasma will lose its energy and pressure extremely rapidly. And with temperature and pressure falling, the fusion reaction will stop. Unlike many fission reactors, a fusion reactor will not have a chain reaction taking place.
[ "Once the fuel elements of a reactor begin to melt, the fuel cladding has been breached, and the nuclear fuel (such as uranium, plutonium, or thorium) and fission products (such as caesium-137, krypton-85, or iodine-131) within the fuel elements can leach out into the coolant. Subsequent failures can permit these radioisotopes to breach further layers of containment. Superheated steam and hot metal inside the core can lead to fuel-coolant interactions, hydrogen explosions, or water hammer, any of which could destroy parts of the containment. A meltdown is considered very serious because of the potential for radioactive materials to breach all containment and escape (or be released) into the environment, resulting in radioactive contamination and fallout, and potentially leading to radiation poisoning of people and animals nearby.\n", "In the intense heat and pressure of the melting reactors, a reaction between the nuclear fuel metal cladding and the remaining water surrounding them produced explosive hydrogen gas. As workers struggled to cool and shut down the reactors, several hydrogen-air chemical explosions occurred.\n", "In the intense heat and pressure of the melting reactors, a reaction between the nuclear fuel metal cladding and the remaining water surrounding them produced explosive hydrogen gas. As workers struggled to cool and shut down the reactors, several hydrogen-air chemical explosions occurred.\n", "In the intense heat and pressure of the melting reactors, a reaction between the nuclear fuel metal cladding and the remaining water surrounding them produced explosive hydrogen gas. As workers struggled to cool and shut down the reactors, several hydrogen-air chemical explosions occurred.\n", "In the intense heat and pressure of the melting reactors, a reaction between the nuclear fuel metal cladding and the remaining water surrounding them produced explosive hydrogen gas. As workers struggled to cool and shut down the reactors, several hydrogen-air chemical explosions occurred. \n", "In the intense heat and pressure of the melting reactors, a reaction between the nuclear fuel metal cladding and the remaining water surrounding them produced explosive hydrogen gas. As workers struggled to cool and shut down the reactors, several hydrogen-air chemical explosions occurred.\n", "Another problem seen in all fusion designs is the heat load that the plasma places on the wall of the confinement vessel. There are materials that can handle this load, but they are generally undesirable and expensive heavy metals. When such materials are sputtered in collisions with hot ions, their atoms mix with the fuel and rapidly cool it. A solution used on most tokamak designs is the \"limiter\", a small ring of light metal that projected into the chamber so that the plasma would hit it before hitting the walls. This eroded the limiter and caused its atoms to mix with the fuel, but these lighter materials cause less disruption than the wall materials.\n" ]
how can humans instinctively know what angles to launch something make it go the farthest?
They learn it. From age 0 on you throw stuff around and observe the physics of the world. That is why people who don't throw things (like balls) as a kid suck at throwing and aiming. So it is not an instinct, it is more of a skill.
[ "Target angle is the relative bearing of the observing station from the vehicle being observed. It may be used to compute point-of-aim for a fire-control problem when vehicle range and speed can be estimated from other information. Target angle may be best explained from the example of a submarine preparing to launch a straight-run (non-homing) torpedo at a moving target ship. Since the torpedo travels relatively slowly, the torpedo course must be set not toward the target, but toward where the target will be when the torpedo reaches it. Target angle is used to estimate target course.\n", "The technique is to start at the estimated position of the target, at a distance above the bottom to provide the best view, and to swim in a cardinal direction a distance roughly equal to or slightly greater than the visibility range. The estimate of distance is commonly by kick counts, so using a whole number of kicks is necessary, and preferably a number which can be mentally accumulated by the diver. Call this distance n kicks, where n is usually 2, 4, 5, 10 or 20 as these are easy numbers to multiply mentally. The direction of turn may be clockwise or anticlockwise as best suits the search.\n", "Plotting the angle of the target was a simple process of taking the gonio reading and setting a rotating straightedge to that value. The problem was determining where along that straightedge the target lay; the radar measured the slant range straight-line distance to the target, not the distance over the ground. That distance was affected by the target's altitude, which had to be determined by taking the somewhat time-consuming altitude measurements. Additionally, that altitude was affected by the range, due to the curvature of the Earth, as well as any imperfections in the local environment, which caused the lobes to have different measurements depending on the target angle.\n", "The earliest form of aiming point was a pair of aiming posts for each gun, almost in line with one another when viewed through the gun's sight, and placed about 50 meters from the gun. There were at least two ways of using these, but the simplest is to aim the sight midway between them.\n", "The basic technique is to track a projectile for sufficient time to record a segment of the trajectory. This is usually done automatically, but some early and not so early radars required the operator to manually track the projectile. Once a trajectory segment is captured it can then be processed to determine its point of origin on the ground. Before digital terrain databases this involved manual iteration with a paper map to check the altitude at the coordinates, change the location altitude and recompute the coordinates until a satisfactory location was found.\n", "In some special circumstances, such as when only one round or salvo was going to be fired (e.g. by nuclear artillery or a multiple rocket launcher), a director or aiming circle about 100 meters away could be used as an aiming point.\n", "A launch technique was developed: approach the target gap at speed, line up onto alignment/ launch markers, drive over first marker then brake sharply at second marked point and fire the explosive bolts holding the travel hawsers so that the fascine, through inertia, rolled off the directly into the middle of the gap. When in position, they travel over it to level the road surface for other vehicles to cross. This whole process would take less than 1 minute, essential for an assault crossing possibly under fire.\n" ]
What does the coronation of Charlemagne as Roman Emperor suggest about attitudes towards the Roman Empire at the time?
I partly answered your question [here](_URL_0_), although admittedly that answer focuses mostly on England in the period. Nonetheless, the answer isn't *radically* different in that early medieval political aspirations hinged on *Romanitas* less as an immediate continuation of Rome, but as a valid successor through the continuation of the facets of Rome which had been worthy of admiration. It was well known that Rome had failed and there was no way for Charlemagne to claim that he was simply the *next* Roman Emperor, but there was tremendous prestige in resurrecting Rome, reforging the empire and being the *new* Roman Emperor. It's worth mentioning, of course, that Charlemagne crowning himself as Emperor was not taken well by the Byzantines, who had been maintaining the Roman Empire perfectly well all this time without him, thank you very much.
[ "Charlemagne was crowned Emperor by Pope Leo III on Christmas Day, 800. The clergy and nobles attending the ceremony proclaimed Charlemagne as \"Augustus\". In support of Charlemagne's coronation, some argued that the Imperial position was actually vacant, deeming a woman unfit to be Emperor. However, Charlemagne made no claim to the Eastern Roman Empire. Whether he actually desired a coronation at all, remains controversial – his biographer Einhard related that Charlemagne had been surprised by the Pope – but the Eastern Empire felt its role as the sole Roman Empire threatened and began to emphasize its superiority and its Roman identity. \n", "The coronation of Charlemagne as \"Roman\" emperor by Pope Leo III in the year 800 was a deprived act of legitimate juridical profile: only the Roman emperor of the East (called \"Byzantine\" later by the Enlightenment in the eighteenth century) would be crowned a peer of him in the western part, which is why Constantinople was always suspicious of that act.\n", "For this reason, Charlemagne, the King of the Franks and King of Italy, was crowned Emperor of the Romans (\"Imperator Romanorum\") by Pope Leo III, as the successor of Constantine VI as Roman Emperor under the concept of \"translatio imperii\". The Eastern Empire eventually relented to recognizing Charlemagne and his successors as emperors, but as \"Frankish\" and \"German emperors\", at no point referring to them as Roman, a label they reserved for themselves.\n", "With Charlemagne's coronation, therefore, \"the Roman Empire remained, so far as either of them [Charlemagne and Leo] were concerned, one and indivisible, with Charles as its Emperor\", though there can have been \"little doubt that the coronation, with all that it implied, would be furiously contested in Constantinople\".\n", "The reasons for the coronation of Charlemagne, the involvement beforehand of the Frankish court, and the relationship to the Eastern Roman Empire are matters of debate among historians. An effective administrator of the papal territories, Leo contributed to the beautification of Rome.\n", "Charlemagne, crowned Roman Emperor in 800 AD, is sometimes considered as a forerunner of the Holy Roman Empire. Most historians today reject this view, arguing that the Holy Roman Empire had different antecedents and a different constitution, and the Holy Roman Emperor had a different status and role than Charlemagne and his successors. After the collapse of Charlemagne's empire, the Imperial crown was initially disputed among the Carolingian rulers of Western Francia (France) and Eastern Francia (Germany), with first the western king (Charles the Bald) and then the eastern (Charles the Fat) attaining the prize. However, after the death of Charles the Fat in 888, the empire broke asunder, never to be restored. According to Regino of Prüm, each part of the realm elected a \"kinglet\" from its own \"bowels\". After the death of Charles the Fat, those who were crowned Emperors by the Pope controlled only territories in Italy. The last of such Emperors was Berengar I of Italy, who died in 924.\n", "On Christmas Day, 800, Pope Leo III crowned Charles as \"Emperor of the Romans\" in Rome in a ceremony presented as a surprise (Charlemagne did not wish to be indebted to the bishop of Rome), a further papal move in the series of symbolic gestures that had been defining the mutual roles of papal \"auctoritas\" and imperial \"potestas.\" Though Charlemagne preferred the title \"Emperor, king of the Franks and Lombards\", the ceremony formally acknowledged the ruler of the Franks as the Roman Emperor, triggering disputes with the Byzantine Empire, which had maintained the title since the division of the Roman Empire into East and West. The pope's right to proclaim successors was based on the Donation of Constantine, a forged Roman imperial decree. After an initial protest at the usurpation, the Byzantine Emperor Michael I Rhangabes acknowledged in 812 Charlemagne as co-emperor, according to some. According to others, Michael I reopened negotiations with the Franks in 812 and recognized Charlemagne as \"basileus\" (emperor), but not as emperor of the Romans. The coronation gave permanent legitimacy to Carolingian primacy among the Franks. The Ottonians later resurrected this connection in 962.\n" ]
if the cold temperatures of frozen food prevent them from going off, why do frozen foods not last forever? can bacteria suddenly survive at colder temperatures after a food has been frozen for a certain length of time?
Even though it is frozen that doesn't mean that the food is static. The food will slowly dehydrate and with that it loses its taste and becomes inedible. The cells in the food also get damaged after long period of being frozen, which cause it to lose flavour
[ "Food frozen at 0 °F and below is preserved indefinitely. However, the quality of the food will deteriorate if it is frozen over a lengthy period. The United States Department of Agriculture, Food Safety and Inspection Service publishes a chart showing the suggested freezer storage time for common foods.\n", "Freezing is an effective form of food preservation because the pathogens that cause food spoilage are killed or do not grow very rapidly at reduced temperatures. The process is less effective in food preservation than are thermal techniques, such as boiling, because pathogens are more likely to be able to survive cold temperatures rather than hot temperatures. One of the problems surrounding the use of freezing as a method of food preservation is the danger that pathogens deactivated (but not killed) by the process will once again become active when the frozen food thaws.\n", "Freezing food to preserve its quality has been used since time immemorial. Freezing temperatures curb the spoiling effect of microorganisms in food, but can also preserve some pathogens unharmed for long periods of time. Freezing kills some microorganisms by physical trauma, others are sublethally injured by freezing, and may recover to become infectious.\n", "Freezing is a common method of food preservation that slows both food decay and the growth of micro-organisms. Besides the effect of lower temperatures on reaction rates, freezing makes water less available for bacterial growth.\n", "Throw out foods that have been warmer than for more than 2 hours. If there is any doubt at all about the length of time the food has been defrosted at room temperature, it should be thrown out. Freezing does not destroy microbes present in food. Freezing at 0 °F does inactivate microbes (bacteria, yeasts and molds). However, once food has been thawed, these microbes can again become active. Microbes in thawed food can multiply to levels that can lead to foodborne illness. Thawed food should be handled according to the same guidelines as perishable fresh food.\n", "Frozen products do not require any added preservatives because microorganisms do not grow when the temperature of the food is below , which is sufficient on its own in preventing food spoilage. Long-term preservation of food may call for food storage at even lower temperatures. Carboxymethylcellulose (CMC), a tasteless and odorless stabilizer, is typically added to frozen food because it does not adulterate the quality of the product.\n", "Freezing food preserves it from the time it is prepared to the time it is eaten. Since early times, farmers, fishermen, and trappers have preserved grains and produce in unheated buildings during the winter season. Freezing food slows down decomposition by turning residual moisture into ice, inhibiting the growth of most bacterial species. In the food commodity industry, there are two processes: mechanical and cryogenic (or flash freezing). The freezing kinetics is important to preserve the food quality and texture. Quicker freezing generates smaller ice crystals and maintains cellular structure. Cryogenic freezing is the quickest freezing technology available due to the ultra low liquid nitrogen temperature .\n" ]
how did iraq go from having the best army in the arab world, to being unable to maintain it's sovereignty?
You may have noticed George Bush lied to the American people to get the US involved in a stupid and un-winnable war with no exit strategy. As a result the most powerful army in the world destroyed the most powerful army in the Arab world. He left them with no resources and no ability to govern themselves and then we pulled out making them likely to be invaded and controlled by a terror state. Another amazing plan courtesy of incredibly stupid US foreign policy.
[ "After the 1973 Arab–Israeli War, Iraq decided to improve all aspects of its army. Iraqi General Ra'ad al-Hamdani stated that, in spite of careful analysis of the 1973 Arab–Israeli War, no clear progress in the Iraqi Army was achieved by the Ba'ath Party. In comparison to their Israeli counterparts, the Iraqi Army was faced with a significant deficit in technological expertise. In 1979, due to Saddam Hussein's policies as well as those of leading Ba'ath Party officials and senior military officers, the Iraqi Army underwent increasing politicization. There was a saying at the time, \"better a good Ba'athist than a good soldier\". During the early months of the Iran–Iraq War, Iraq attained successes because of Ba'ath Party interference and its attempts to improve the Iraqi Army, but the essential problem was that the military leaders did not have a clear strategy or operational aim for a war. \n", "For the Arab states (and Egypt in particular), Arab successes during the war healed the psychological trauma of their defeat in the Six-Day War, allowing them to negotiate with the Israelis as equals. Because of the later setbacks in the war (which saw Israel gain a large salient on African soil and even more territory on the Syrian front), some believe that the war helped convince many in the Arab world that Israel could not be defeated militarily, thereby strengthening peace movements and delaying the Arab ambition of destroying Israel by force.\n", "Even though Iraq was ruled by another branch of the Ba'ath Party, Assad's relations with Saddam Hussein were extremely strained, mainly because of Assad's support for Iran during the Iraq-Iran war, which Saddam was unable to forgive.However, Saddam had despatched Iraqi army tanks to Damascus in order to prevent the Israeli Defence Forces from taking control of the city. This entry of the Iraq, then considered the leading Arab nation both economically as well as militarily, into Syria marks the first and, to date, only time in Syrian history where a foreign Arab army has entered its land. Assad had supported Iran in the war, and Iran found another ally in the Kurds in Iraq, who assisted Iran's offensive at the northern Iraq.\n", "Because Saddam Hussein rarely left Iraq, Tariq Aziz, one of Saddam's aides, traveled abroad extensively and represented Iraq at many diplomatic meetings. In foreign affairs, Saddam sought to have Iraq play a leading role in the Middle East. Iraq signed an aid pact with the Soviet Union in 1972, and arms were sent along with several thousand advisers. However, the 1978 crackdown on Iraqi Communists and a shift of trade toward the West strained Iraqi relations with the Soviet Union; Iraq then took on a more Western orientation until the Gulf War in 1991.\n", "Saddam Hussein had also poured massive resources into regime protection agencies, like the Republican Guard (Iraq), that later took on a battlefield role. Losses during the Persian Gulf War from the United States-led coalition resulted in the reduction of Iraq's ground forces to 23 divisions and the air force to less than 300 aircraft. The Iraqi Popular Army was also disbanded. Military and economic sanctions prevented Iraq from rebuilding its military power. What rebuilding was done was concentrated on the Republican Guard and the new Special Republican Guard, created after the war ended. Iraq maintained a standing military of about 375,000 troops. Among the components of the military was the Directorate of General Military Intelligence.\n", "Kenneth Pollack, a U.S. military analyst, wrote in c.2002 that 'from 1948 to 1956, the Arab Legion was far superior to any of the other Arab militaries. In battle, it generally gave as good as it got, and the Israelis considered it their most dangerous adversary. However, after 1956, the Jordanian capabilities began to decline. In 1967 they performed worse than in 1948, although the exceptional performance of the 40th Armoured Brigade and a number of Israeli mistakes helped disguise the deterioration somewhat. Thereafter Jordanian capabilities continued to gradually erode.'\n", "Since 1980, the foreign relations of Iraq were influenced by a number of controversial decisions by the Saddam Hussein administration. Hussein had good relations with the Soviet Union and a number of western countries such as France and Germany, who provided him with advanced weapons systems. He also developed a tenuous relation with the United States, who supported him during the Iran–Iraq War. However, the Invasion of Kuwait that triggered the Gulf War brutally changed Iraq's relations with the Arab World and the West. Egypt, Saudi Arabia, Syria and others were among the countries that supported Kuwait in the UN coalition. After the Hussein administration was toppled by the 2003 invasion of Iraq, the governments that succeeded it have now tried to establish relations with various nations.\n" ]
My understanding is that both Sodium and Chlorine by themselves are dangerous (explodes in water and is toxic, respectively). If that is true, why is dissolved sodium chloride (salt) perfectly safe? Why don't the dissolved ions have the same properties as sodium and chloride separately?
The form of chlorine which is dangers is [chlorine gas, (Cl2)](_URL_0_) which has very different properties from the [chloride ion. (Cl-)](_URL_1_)
[ "While sodium hypochlorite is non-toxic, its corrosive properties, common availability, and reaction products make it a significant safety risk. In particular, mixing liquid bleach with other cleaning products, such as acids or ammonia, may produce toxic fumes.\n", "A disadvantage of sodium is its chemical reactivity, which requires special precautions to prevent and suppress fires. If sodium comes into contact with water it reacts to produce sodium hydroxide and hydrogen, and the hydrogen burns when in contact with air. This was the case at the Monju Nuclear Power Plant in a 1995 accident. In addition, neutrons cause it to become radioactive; however, activated sodium has a half-life of only 15 hours.\n", "Sodium chlorite, like many oxidizing agents, should be protected from inadvertent contamination by organic materials to avoid the formation of an explosive mixture. The chemical is stable in pure form and does not explode on percussive impact, unless organic contaminants are present, such as on a greasy hammer striking the chemical on an anvil. It also easily ignites by friction if combined with a reducing agent like powdered sugar, sulphur or red phosphorus.\n", "Sodium forms flammable hydrogen and caustic sodium hydroxide on contact with water; ingestion and contact with moisture on skin, eyes or mucous membranes can cause severe burns. Sodium spontaneously explodes in the presence of water due to the formation of hydrogen (highly explosive) and sodium hydroxide (which dissolves in the water, liberating more surface). However, sodium exposed to air and ignited or reaching autoignition (reported to occur when a molten pool of sodium reaches about 290 °C) displays a relatively mild fire. In the case of massive (non-molten) pieces of sodium, the reaction with oxygen eventually becomes slow due to formation of a protective layer. Fire extinguishers based on water accelerate sodium fires; those based on carbon dioxide and bromochlorodifluoromethane should not be used on sodium fire. Metal fires are Class D, but not all Class D extinguishers are workable with sodium. An effective extinguishing agent for sodium fires is Met-L-X. Other effective agents include Lith-X, which has graphite powder and an organophosphate flame retardant, and dry sand. Sodium fires are prevented in nuclear reactors by isolating sodium from oxygen by surrounding sodium pipes with inert gas. Pool-type sodium fires are prevented using different design measures called catch pan systems. They collect leaking sodium into a leak-recovery tank where it is isolated from oxygen.\n", "Sodium cyanide is an inorganic compound with the formula NaCN. It is a white, water-soluble solid. Cyanide has a high affinity for metals, which leads to the high toxicity of this salt. Its main application, in gold mining, also exploits its high reactivity toward metals. It is a moderately strong base. When treated with acid, it forms the toxic gas hydrogen cyanide:\n", "Sodium chlorate comes in dust, spray and granule formulations. There is a risk of fire and explosion in dry mixtures with other substances, especially organic materials, and other herbicides, sulfur, phosphorus, powdered metals, and strong acids. In particular, when mixed with sugar, it has explosive properties. If accidentally mixed with one of these substances it should not be stored in dwellings.\n", "Sodium bromide can be used instead of sodium chloride, which produces a bromine pool. The benefits and downsides are the same as those of a salt system. It is not necessary to use a chloride-based acid to balance the pH. Also, bromine is only effective as a sanitizer, not as an oxidizer, leaving a need for adding a \"shock\" such as hydrogen peroxide or any chlorine-based shock to burn off inorganic waste and free up combined bromines. This extra step is not needed in a sodium chloride system, as chlorine is effective as both a sanitizer and an oxidizer. A user would only need to \"super chlorinate\" or increase chlorine production of the cell occasionally. That would normally be once a week or after heavy bather loads.\n" ]
according to the bible, how did jesus's death save humanity?
ELI5: Imagine you're in a courtroom, and you're guilty of a crime. You owe an exorbitant fine, and you can't pay it. Then a man comes along and offers to pay it for you. This is the only man with enough money to pay that fine, and he pays it in your place, satisfying the legal requirement. That's what Jesus did. Every human who sins is guilty, and (according to the bible), deserves death. One of us cannot take on the death sentence for another, as we all have our own death sentence. In other words, I can't die for your sins because I have to die for mine. Jesus is the only human who never sinned, being God in human flesh. Since He had no sin, he could take the place of others. He willingly was tortured and killed, and God placed our sins on Him. His physical death paid the 'fine' for us, freeing us from court and from everlasting death. Jesus was a perfect scapegoat, without any spot or blemish, and by accepting him and respecting his wishes for what he did, we are saved by his payment. TL;DR A perfect man died, so that he could pay for the sins of imperfect men. Read Romans 1-6 for the full explanation, as well as how to take advantage of the payment. *** Edit: I am glad to see the interest, and thanks for the gold and the discussion! A lot of questions that people have are legitimate, and I'm glad to see that some other people helped out while I was sleeping. Since this is the very simple ELI5 version, I left a lot of the details and the whys out of my explanation. Since the thread is locked, feel free to PM me or one of the others in this thread. I promise, I will respond with civility, and no question is a bad one. Second edit: I've read the comments, and oh I wish I could respond! Circumcision, God's motives, justice, scapegoats, the possibility of being saved without Jesus, Spiritual death vs. Physical, etc. I'd be happy to answer any questions I can! And hopefully in as simple of terms as I can.
[ "Christians predominantly profess that through Jesus' life, death, and resurrection, he restored humanity's communion with God with the blood of the New Covenant. His death on a cross is understood as a redemptive sacrifice: the source of humanity's salvation and the atonement for sin which had entered human history through the sin of Adam.\n", "Jesus sacrificed his life by freely accepting death on the cross and being put in a tomb. In experiencing death and overcoming it in resurrection, Christ assures us that we will have life everlasting with God as we too, through Christ's accomplishment as our representative, will triumph over death and pass into eternal life with the resurrection of the glorified body.\n", "Jesus Christ said that He came to earth to seek and to save that which was lost (Luke 19:10). He accomplished salvation through the cross. By dying on the cross, He paid the penalty for sin and satisfied God’s wrath. According to Scripture, without the cross, there is no salvation, no forgiveness, and no hope; because of the cross, there is eternal life. The mission and message of Jesus surround the cross. “For the word of the cross is to those who are perishing foolishness, but to us who are being saved it is the power of God” (1 Cor 1:18).\n", "Jesus really died in his humanity when being 'put to death in the flesh', so 'made alive in the spirit' does not mean that a \"part\" of Christ survived death, but that 'God raised Christ to a new life in the divine realm' (cf. ; ; ).\n", "Most Christians believe Jesus did initially die, but was then resurrected from the dead by God, before being raised bodily to heaven to sit at the Right Hand of God with a promise to someday return to earth. The minority views that Jesus did not die are known as the swoon hypothesis and Docetism.\n", "In Paul's view, \"Jesus’ death was not a defeat but was for the believers’ benefit,\" a sacrifice which substitutes for the lifes of others, and frees them from the bondage of sin. Believers participate in Christ's death and resurrection by their baptism. The resurrection of Jesus was of primary importance to Paul, bringing the promise of salvation to believers. Paul taught that, when Christ returned, those who had died believing in Christ as the saviour of mankind would be brought back to life, while those still alive would be \"caught up in the clouds together with them to meet the Lord in the air\" \n", "According to the orthodox Christian view, Jesus saved humanity from final death and damnation by dying for them. Most Christians believe that Christ's sacrifice supernaturally reversed death's power over humanity, proved when he was resurrected, and abolished the power of sin on humanity. According to Paul, \"if the many died by the trespass of the one man, how much more did God's grace and the gift that came by the grace of the one man, Jesus Christ, overflow to the many\" (Romans 5:15). For many Christians, atonement doctrine leads naturally into the eschatological narratives of Christian people rising from the dead and living again, or immediately entering heaven to join Jesus.\n" ]
Why is spit bubbly like soap bubbles?
Saliva has a lot of proteins in it, proteins can increase surface tension and lead to stronger bubbles like the lipids in soap.
[ "Just as soap bubbles, with air inside and air outside, have negative buoyancy and tend to sink towards the ground, so antibubbles, with water inside and air outside have positive buoyancy and tend to rise towards the water surface. But again, just as soap bubbles can be filled with a lighter gas to give them positive buoyancy, so antibubbles can be filled with a heavier liquid to give them negative buoyancy. Using a drinking straw to drop droplets of sugar solution onto soapy water will produce antibubbles that sink.\n", "BULLET::::- Soap bubbles have very large surface areas with very little mass. Bubbles in pure water are unstable. The addition of surfactants, however, can have a stabilizing effect on the bubbles (see Marangoni effect). Note that surfactants actually reduce the surface tension of water by a factor of three or more.\n", "A soap bubble is an extremely thin film of soapy water enclosing air that forms a hollow sphere with an iridescent surface. Soap bubbles usually last for only a few seconds before bursting, either on their own or on contact with another object. They are often used for children's enjoyment, but they are also used in artistic performances. Assembling several bubbles results in foam.\n", "In a normal soap bubble, surfactants reduce the surface tension of the water and allow the bubble to form. To create a colored bubble, dye molecules must bond to the surfactants. Each dye molecule in \"Zubbles\" is a structure known as a lactone ring. When the ring is closed, the molecule absorbs all visible light except for the color of the bubble. However, subjecting the lactone ring to air, water, or pressure causes the ring to open. This changes the molecule's structure to a straight chain which absorbs no visible light.\n", "A bubble is made of transparent water enclosing transparent air. However the soap film is as thin as the visible light wavelength, resulting in interferences. This creates iridescence which, together with the bubble's spherical shape and fragility, contributes to its magical effect on children and adults alike. Each colour is the result of varying thicknesses of soap bubble film. Tom Noddy (who featured in the second episode of Marcus du Sautoy's \"The Code\") gave the analogy of looking at a contour map of the bubbles' surface. However, it has become a challenge to produce artificially coloured bubbles.\n", "Spherical bubbles in soapy water in a fcc or hcp arrangement, when the water in the gaps between the bubbles drains out, also approach the rhombic dodecahedral honeycomb or trapezo-rhombic dodecahedral honeycomb. However, such fcc or hcp foams of very small liquid content are unstable, as they do not satisfy Plateau's laws. The Kelvin foam and the Weaire–Phelan foam are more stable, having smaller interfacial energy in the limit of a very small liquid content.\n", "Zubbles is a commercial name for colored soap bubbles. Zubbles claim to fame is that they are the first colored soap bubbles that do not leave stains. Instead they fade away with exposure to air, pressure, and water. \n" ]
it just hit me that there are no longer any wild cows. how/when did this happen?
Cattle were domesticated from the wild aurochs. As time went on, the aurochs were hunted, saw their available habitat shrink greatly, and contracted diseases from domesticated cattle. The last one died in the 17th century.
[ "The loss of livestock was not discovered until spring, when many cattle carcasses were spread across the fields and washed down streams. The few remaining cattle were in poor health, emaciated and suffering from frostbite. This resulted in the cattle being sold for much less, in some cases leading to bankruptcy.\n", "In the early 1920s, there was an outbreak of a previously unrecognized cattle disease in the northern United States and Canada. Cattle were haemorrhaging after minor procedures and on some occasions, spontaneously. For example, 21 out of 22 cows died after dehorning and 12 out of 25 bulls died after castration. All of these animals had bled to death.\n", "The native population declined in the 20th century due to a combination of factors, with the wild population in Mongolia dying out in the 1960s. The last herd was sighted in 1967, and the last individual horse in 1969. Expeditions after this failed to locate any horses, and the species had been designated \"extinct in the wild\" for over 30 years.\n", "By 1968, the wild herd were concentrated mostly on BLM lands owing to previous roundups and construction of boundary fences. That year, the BLM again stated its intention to remove the herds, this time with the possibility of returning a small number (either 15 or 35) to the range. In response to the new announcement, the Pryor Mountain Wild Horse Association (PMWHA) was formed with the goal of preventing the roundup, and began working in concert with larger organizations such as the International Society for the Protection of Animals. The BLM argued that the horses were being removed because they were likely to starve, as they had overgrazed their environment, while the PMWHA argued the degradation of the range was not due to the horses and that in fact they were in no danger of starving. The organization further charged that the BLM was acting at the behest of other state and federal organizations who wished to see the horses removed, rather than acting in line with public opinion. The PMWHA was also concerned with the effect that the penning would have on the feral horses.\n", "When the population departed they left a herd of beef cattle - 8 cows and 1 bull (Shorthorn - Aberdeen-Angus cross). Five generations later, in 2004, the herd which had turned feral was still going strong, and is now classified as a new breed in the \"World Dictionary of Livestock Breeds\". It then consisted of ten bulls, four cows, and two calves. Two calves are born each spring, although not all live to maturity. The herd gets no additional feed, although it is checked by a vet each year. The animals are self-selecting for hardiness, easy calving, and low-maintenance, feeding off the grass and seaweed. Having been separated from the mainland for so long, they are completely disease-free, and have reverted to wild behaviour. Because of this, DNA samples have been taken, from the ears of some of the cattle that died. In the summer the main herd is usually in the centre of the island.\n", "In 1900, there were two to five million feral horses in the United States. However, their numbers were in steep decline as domestic cattle and sheep competed with them for resources. After the mid-1930s, their numbers fell even more drastically due to intervention by the U.S. government. The United States Forest Service and the U.S. Grazing Service (the predecessor to the Bureau of Land Management (BLM)) began to remove feral horses from federal land. The two agencies were concerned that there were too many horses on the land, which led to overgrazing and significant soil erosion. Ranchers wanted the feral horses removed because they were grazing on land ranchers wanted to use for their own livestock. Hunters were worried that as horses degraded range land, hunting species would also suffer. \n", "After the first case of mad cow disease that was discovered, two more cases emerged. In 2005, the second instance was found in a cow in Texas, and the third was found in 2006 in a cow from Alabama. In 2012, this issue still remains a controversy. On April 24, 2012, the Department of Agriculture discovered a dairy cow in central California with mad cow disease. The USDA's chief veterinary officer, John Clifford, stated that the cow's meat did not enter the food supply. In addition to this, the carcass will be destroyed. The infected cow was found due to random sampling and is considered the fourth cow in the U.S. to be infected with BSE. This has caused the controversy to arise once again and speculation on whether the VSTA regulates testing for BSE in cows is still a hot topic to be discussed.\n" ]
work, power, and energy (physics) and their differences
Work - When a **force** moves an **object**, **energy is transferred** and **work is done**. Work is measured in Joules. Whenever something moves, something else is providing some sort of **effort** to move it. The thing providing the effort needs some sort of **energy** (food, fuel, electricity etc.). It then does work by moving the object, and in doing so transfers the energy it receives as fuel into other forms. The formula for working out work is *work done = force x distance*. Power - Power is the **rate** of doing work, i.e. how much per second. A powerful machine doesn't necessarily exert a strong force (it usually does though), a powerful machine is one which transfers a lot of energy in a short space of time. It is measured in Watts, which are 1 J/s. So, for example, if a bunch of hooligans drag a tractor tyre 5m over the ground in 10 seconds, and they pull with a force of 340 Newtons. You would do 340 x 5, or force x distance. This works out at them having done 1700J of **work**. Now, since it took them 10 seconds, we do1700/10, which gives 170 Watts, which is how much **power** they had. Energy - energy can be defined as (according to Wikipedia) " the ability a physical system has to do work on other physical systems". I hope this helps. Not quite ELI5, more like ELI15, sorry 'bout that.
[ "As a physical concept, power requires both a change in the physical system and a specified time in which the change occurs. This is distinct from the concept of work, which is only measured in terms of a net change in the state of the physical system. The same amount of work is done when carrying a load up a flight of stairs whether the person carrying it walks or runs, but more power is needed for running because the work is done in a shorter amount of time. \n", "Energy – in physics, this is an indirectly observed quantity often understood as the ability of a physical system to do work on other physical systems. Since work is defined as a force acting through a distance (a length of space), energy is always equivalent to the ability to exert force (a pull or a push) against an object that is moving along a definite path of certain length.\n", "In physics, power is the rate of doing work or of transferring heat, i.e. the amount of energy transferred or converted per unit time. Having no direction, it is a scalar quantity. In the International System of Units, the unit of power is the joule per second (J/s), known as the watt in honour of James Watt, the eighteenth-century developer of the condenser steam engine. Another common and traditional measure is horsepower (comparing to the power of a horse). Being the rate of work, the equation for power can be written:\n", "The basic definition of \"energy\" is a measure of a body's (in thermodynamics, the system's) ability to cause change. For example, when a person pushes a heavy box a few meters forward, that person exerts mechanical energy, also known as work, on the box over a distance of a few meters forward. The mathematical definition of this form of energy is the product of the force exerted on the object and the distance by which the box moved (Work=Force x Distance). Because the person changed the stationary position of the box, that person exerted energy on that box. The work exerted can also be called \"useful energy\". Because energy was converted from one form into the intended purpose, i.e. mechanical utilisation. For the case of the person pushing the box, the energy in the form of internal (or potential) energy obtained through metabolism was converted into work in order to push the box. This energy conversion, however, was not straight-forward. In other words, while some internal energy went into pushing the box, some was diverted away (lost) in the form of heat (transferred thermal energy). For a reversible process, heat is the product of the absolute temperature \"T\" and the change in entropy \"S\" of a body (entropy is a measure of disorder in a system). The difference between the change in internal energy, which is ΔU, and the energy lost in the form of heat is what is called the \"useful energy\" of the body, or the work of the body performed on an object. In thermodynamics, this is what is known as \"free energy\". In other words, free energy is a measure of work (useful energy) a system can perform at constant temperature. Mathematically, free energy is expressed as:\n", "In electrical engineering, power represents the rate of electrical energy flowing into or out of a given component or control volume. Power is a signed quantity; negative power just represents power flowing in the opposite direction from positive power. From the standpoint of power flow, electrical components in a circuit can be divided into two types: \n", "Energy is a scalar quantity and the mechanical energy of a system is the sum of the potential energy (which is measured by the position of the parts of the system) and the kinetic energy (which is also called the energy of motion):\n", "In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The SI unit of energy is the joule, which is the energy transferred to an object by the work of moving it a distance of 1 metre against a force of 1 newton.\n" ]
In light of the recent growth of sightings of Tasmanian Tigers and possibility of a species coming back from what we thought was extinction... Has this happened with any other species in the last ~500 years?
Black footed ferrets from the US and Canada were declared extinct in 1979 due to farmers poisoning prairie dogs, their food supply. Lo and behold, a farmer's dog brought home a dead one 2 years later and they became endangered instead!
[ "BULLET::::- Tasmanian tiger – Despite the widely held view that the thylacine (or Tasmanian tiger) became extinct during the 1930s, accounts of alleged sightings in eastern Victoria and parts of Tasmania have persisted to the present day.\n", "The eastern quoll likely became extinct on mainland Australia due to disease and predation by introduced predators (red fox and feral cat). The lack of foxes in Tasmania likely has contributed to the survival of the species there; however, unseasonal weather events and predation by feral cats are thought to have contributed to a possible recent decline in the Tasmanian population. The species is currently classified as Endangered by the IUCN.\n", "The island of Tasmania was home to the thylacine, a marsupial which resembled a wild dog. Known colloquially as the Tasmanian tiger for the distinctive striping across its back, it became extinct in mainland Australia about 4,000 years ago because of competition by the introduced dingo. Owing to persecution by farmers, government-funded bounty hunters and, in the final years, collectors for overseas museums, it appears to have been exterminated in Tasmania.\n", "Perhaps the saddest extinction of all, this depressing episode tells the story of how one gunshot in Wilfrid Batty's gun not only ended the life of one of the last Tasmanian tigers but sounded the death knell for the entire species. The program covers basic anatomy of the marsupial and shows it hunting in the wild. It also shows actual footage of the animal in zoos. It is explained that the tiger's disappearance was due to the bounty system, in which the government paid everyone who killed a Tasmanian tiger 1 pound. When it was realized that the animal was becoming extinct, there was a rush to catch every last one and put them in zoos. Most zoo specimens died by the 1930s. The last tiger ever seen was \"Ben\", in Hobart Zoo. There were two final twists to this tale: \"Ben\" wasn't a male thylacine and, when she died in September 1936, \"Ben\" had endured her last 59 days as a protected species.\n", "This species is possibly extinct. In 2017, a statistical model assessed the extinction probability of 23 mammal species that have been missing since the 19th century. The Aru flying fox was one of the five species that the model determined was almost certainly extinct. There has not been a confirmed sighting of this species since 1877.\n", "Far more recent possible or presumed extinctions of species which may turn out still to exist include the thylacine, or Tasmanian tiger (\"Thylacinus cynocephalus\"), the last known example of which died in Hobart Zoo in Tasmania in 1936; the Japanese wolf (\"Canis lupus hodophilax\"), last sighted over 100 years ago; the ivory-billed woodpecker (\"Campephilus principalis\"), last sighted for certain in 1944; and the slender-billed curlew (\"Numenius tenuirostris\"), not seen since 2007.\n", "The island of Tasmania was home to the thylacine, a marsupial which resembled a fossa or some say a wild dog. Known colloquially as the Tasmanian tiger for the distinctive striping across its back, it became extinct in mainland Australia much earlier because of competition by the dingo, introduced in prehistoric times. Owing to persecution by farmers, government-funded bounty hunters and, in the final years, collectors for overseas museums, it appears to have been exterminated in Tasmania. The Tasmanian devil became the largest carnivorous marsupial in the world following the extinction of the thylacine in 1936, and is now found in the wild only in Tasmania. Tasmania was one of the last regions of Australia to be introduced to domesticated dogs. Dogs were brought from Britain in 1803 for hunting kangaroos and emus. This introduction completely transformed Aboriginal society, as it helped them to successfully compete with European hunters, and was more important than the introduction of guns for the Aboriginals.\n" ]
Why galaxies have shape at all? (speed of light, correlation light scale, causality)
Changes must not be faster than the speed of light, but existing fields are not changes. Gravity for example is traveling at the speed of light. By your thought, the sun shouldn't be capable to pull on earth, because it is so far away. But actually, the gravitational field already exists and we are moving in it, so there is no contradiction. If the sun's mass was to disappear all of a sudden, the information would then propagate through space at the speed of light and reach us about 8 minutes later. The earth would be shot into space, because there is no force holding us at our place. And it is the same for light. Truely, information can only travel at the speed of light. But the thing is, we don't see things in realtime but i a distorted way because of that. That doesn't matter much though, because the actual change is so insignificant even over galactic scales that we can't really tell a difference. The stars in our galaxy are moving at about 250 km/s. If you have two reference star at two opposite points of the milky way (100,000 ly diameter) their actual position would differ only about 3 lightyears from their seen position, or a tiny fraction of a degree not even visible to the unaided eye. The appearance is maintained by "too insignificant changes".
[ "There are many galaxies visible in telescopes with red shift numbers of 1.4 or higher. All of these are currently traveling away from us at speeds greater than the speed of light. Because the Hubble parameter is decreasing with time, there can actually be cases where a galaxy that is receding from us faster than light does manage to emit a signal which reaches us eventually.\n", "The majority of active galaxies are very distant and show large Doppler shifts. This suggests that active galaxies occurred in the early Universe and, due to cosmic inflation, are receding away from the Milky Way at very high speeds. Quasars are the furthest active galaxies, some of them being observed at distances 12 billion light years away. Seyfert galaxies are much closer than quasars. Because light has a finite speed, looking across large distances in the Universe is equivalent to looking back in time. Therefore, the observation of active galactic nuclei at large distances and their scarcity in the nearby Universe suggests that they were much more common in the early Universe, implying that active galactic nuclei could be early stages of galactic evolution. This leads to the question about what would be the local (modern-day) counterparts of AGNs found at large redshifts. It has been proposed that NLSy1s could be the small redshift counterparts of quasars found at large redshifts (z4). The two have many similar properties, for example: high metallicities or similar pattern of emission lines (strong Fe [II], weak O [III]). Some observations suggest that AGN emission from the nucleus is not spherically symmetric and that the nucleus often shows axial symmetry, with radiation escaping in a conical region. Based on these observations, models have been devised to explain the different classes of AGNs as due to their different orientations with respect to the observational line of sight. Such models are called unified models. Unified models explain the difference between Seyfert I and Seyfert II galaxies as being the result of Seyfert II galaxies being surrounded by obscuring toruses which prevent telescopes from seeing the broad line region. Quasars and blazars can be fit quite easily in this model. The main problem of such an unification scheme is trying to explain why some AGN are radio loud while others are radio quiet. It has been suggested that these differences may be due to differences in the spin of the central black hole.\n", "In models of the expanding universe, the farther galaxies are from each other, the faster they drift apart. This receding is not due to motion \"through\" space, but rather to the expansion of space itself. For example, galaxies far away from Earth appear to be moving away from the Earth with a speed proportional to their distances. Beyond a boundary called the Hubble sphere, the rate at which their distance from Earth increases becomes greater than the speed of light.\n", "Galaxies are categorized according to their visual morphology as elliptical, spiral, or irregular. Many galaxies are thought to have supermassive black holes at their centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than the Sun. As of March 2016, GN-z11 is the oldest and most distant observed galaxy with a comoving distance of 32 billion light-years from Earth, and observed as it existed just 400 million years after the Big Bang.\n", "Caution is required in describing structures on a cosmic scale because things are often different from how they appear. Gravitational lensing (bending of light by gravitation) can make an image appear to originate in a different direction from its real source. This is caused when foreground objects (such as galaxies) curve surrounding spacetime (as predicted by general relativity), and deflect passing light rays. Rather usefully, strong gravitational lensing can sometimes magnify distant galaxies, making them easier to detect. Weak lensing (gravitational shear) by the intervening universe in general also subtly changes the observed large-scale structure.\n", "For relatively nearby galaxies (redshift \"z\" much less than unity), \"v\" and \"D\" will not have changed much, and \"v\" can be estimated using the formula formula_18 where \"c\" is the speed of light. This gives the empirical relation found by Hubble.\n", "Since observations of galaxy rotation do not match the distribution expected from application of Kepler's laws, they do not match the distribution of luminous matter. This implies that spiral galaxies contain large amounts of dark matter or, in alternative, the existence of exotic physics in action on galactic scales. The additional invisible component becomes progressively more conspicuous in each galaxy at outer radii and among galaxies in the less luminous ones.\n" ]