question
stringlengths
3
301
answer
stringlengths
9
7.04k
context
sequencelengths
7
7
Why does the discovery of this LQG (Large Quasar Group) which is 4 billion light years wide, seem to threaten Einstein's Cosmological Principle?
The CP is that the universe is homogenous in every direction and there's no privileged point. Any extremely large structure would violate that principle because it's clearly different than the rest of the universe On the humongous scale of the unverse, imagine the galaxies spread out like static on a mistuned TV. Pick a spot, how would you explain to another person, relative to the features on the image, where that spot is? It would be impossible, however if there's a cluster of white dots (galaxies) around the lower left corner, you could describe the spot's location relative to that location. Not sure the find is big enough to violate the CP. It's not 100% exact, but close as you can see here: _URL_0_
[ "Further support for the reality of the Huge-LQG comes from the work of Hutsemékers \"et al.\" in September 2014. They measured the polarization of quasars in the Huge-LQG and found \"a remarkable correlation\" of the polarization vectors on scales larger than 500 Mpc.\n", "The Huge-LQG was estimated to be about 1.24 Gpc in length, by 640 Mpc and 370 Mpc on the other dimensions, and contains 73 quasars, respectively. Quasars are very luminous active galactic nuclei, thought to be supermassive black holes feeding on matter. Since they are only found in dense regions of the universe, quasars can be used to find overdensities of matter within the universe. It has the approximate binding mass of 6.1 (6.1 trillion (long scale) or 6.1 quintillion (short scale)) . The Huge-LQG was initially named U1.27 due to its average redshift of 1.27 (where the \"U\" refers to a connected unit of quasars), placing its distance at about 9 billion light-years from Earth.\n", "More than 200,000 quasars are known, most from the Sloan Digital Sky Survey. All observed quasar spectra have redshifts between 0.056 and 7.54 (as of 2017). Applying Hubble's law to these redshifts, it can be shown that they are between 600 million and 29.36 billion light-years away (in terms of comoving distance). Because of the great distances to the farthest quasars and the finite velocity of light, they and their surrounding space appear as they existed in the very early universe.\n", "Eventually, starting from about the 1970s, many lines of evidence (including the first X-Ray space observatories, knowledge of black holes and modern models of cosmology) gradually demonstrated that the quasar redshifts are genuine, and due to the expansion of space, that quasars are in fact as powerful and as distant as Schmidt and some other astronomers had suggested, and that their energy source is matter from an accretion disc falling onto a supermassive black hole. This included crucial evidence from optical and X-Ray viewing of quasar host galaxies, finding of 'intervening' absorption lines which explained various spectral anomalies, observations from gravitational lensing, Peterson and Gunn's 1971 finding that galaxies containing quasars showed the same redshift as the quasars, and Kristian's 1973 finding that the \"fuzzy\" surrounding of many quasars was consistent with a less luminous host galaxy.\n", "Seshadri Nadathur at the University of Bielefeld has conducted an even more comprehensive study of the Huge-LQG. After a more detailed study, he announced that contrary to the claim by Clowes about a large clustering, his new map has shown that there is no clear clustering of quasars within the vicinity of the Huge-LQG. The map was actually similar to the one produced by Clowes (see above section) - with the difference that Nadathur's map included all the quasars in that region. After performing a number of statistical analyses on the quasar data, and finding extreme changes in the Huge-LQG membership and shape with small changes in the cluster finding parameters, he determined the probability that apparent clusters the size of the Huge-LQG would appear in a random assortment of quasars. He set up 10,000 regions identical in size to that studied by Clowes, and filled them with randomly distributed quasars with the same position statistics as did the actual quasars in the sky. The data is supporting the study of the homogeneity scale by Yadav \"et al.\", and that there is, therefore, no challenge to the cosmological principle. The study also implies that the statistical algorithm used by Clowes to identify the Huge-LQG, when used to correlate other quasars in the sky, produces more than a thousand clusterings identical to the Huge-LQG. While quasars can represent dense regions of the universe, one must note that all of the quasars in the sky are evenly distributed, that is, one quasar per few million light years, making their significance as a structure very unlikely. The identification of the Huge-LQG, together with the clusterings identified by Nadathur, is therefore referred to be false positive identifications or errors in identifying structures, finally arriving at the conclusion that the Huge-LQG is not a real structure at all.\n", "Lying at a distance of 9.5 billion light years away, the CCLQG is a cosmic decoupling of 34 individual quasars (highly luminous active galactic nuclei powered by supermassive black holes) spanning a region roughly 2 billion light-years in length, and about 1 billion light years wide, making it one of the largest and most exotic cosmic structures known in the observable universe. It was named U1.28 because of its average redshift of 1.28, and is located in the constellation of Leo. It was also notable because it is located in the ecliptic, the line where the Sun seems to travel in the entire year. It was 1.8 billion light-years away from the Huge-LQG, a group of 73 quasars discovered in 2012.\n", "During the quasar controversies of the 1970s, these same astronomers were also of the opinion that quasars exhibited high redshifts not due to their incredible distance but rather due to unexplained \"intrinsic redshift\" mechanisms that would cause the periodicities and cast doubt on the Big Bang. Arguments over how distant quasars were took the form of debates surrounding quasar energy production mechanisms, their light curves, and whether quasars exhibited any proper motion. Astronomers who believed quasars were not at cosmological distances argued that the Eddington luminosity set limits on how distant the quasars could be since the energy output required to explain the apparent brightness of cosmologically-distant quasars was far too high to be explainable by nuclear fusion alone. This objection was made moot by the improved models of gravity-powered accretion disks which for sufficiently dense material (such as black holes) can be more efficient at energy production than nuclear reactions. The controversy was laid to rest by the 1990s when evidence became available that observed quasars were actually the ultra-luminous cores of distant active galactic nuclei and that the major components of their redshift were in fact due to the Hubble flow.\n" ]
Why are there so many volcanic eruptions recently? Are they somehow connected or is it a coincidence? Or is it just new media coverage?
The current level of activity is normal. On average, there are usually ~20 volcanoes in some stage of erupting at any given time. The recent news worthy eruptions (e.g. Hawaii and the recent one in Guatemala) are not connected. So the short answer it's just the coverage and/or the fact that these two eruptions are happening in populated places and that both are being filmed a lot by locals (mostly safely in the case of Hawaii and **really** unsafely in the case of the Guatemalan eruption, you should never be as close to a pyroclastic flow as some of the people shooting video are). As for the rates, couldn't find any particularly good plots, but you can check out [the smithsonian](_URL_0_) weekly eruption report to 1) get a sense that there are lots of eruptions going on that aren't making the news and 2) if you go back into the archives, which span ~18 years, you can get a somewhat qualitative sense that this number of currently erupting volcanoes isn't particularly odd. As a side note, this is not quite real time, so this is the summary for last week so it doesn't yet include the eruption in Guatemala.
[ "Volcanic activity began less than one million years ago and occurred at between 40 and 30 separate volcanic vents. The field erupted various kinds of lavas of mostly basaltic type with a high content of xenoliths, which often underwent interactions with water and thus caused steam explosions and the formation of particular volcanic structures such as tuff cones. The last eruption took place 35,000 or 76,000 years ago and future hazardous eruptions are possible.\n", "Although volcanic eruptions are notoriously chaotic in their frequency, some scientists warn that a large eruption is \"overdue\". Research from Massey University indicates that significant seismic activity is likely again in the next 50 years. Prevailing winds would probably blow ash east, covering much of the North Island, and disrupting air routes, power transmission lines and local water supplies.\n", "The eruption made headlines around the world when it began, and was covered constantly by Icelandic news crews throughout. In Europe, the eruption was one of the biggest news items while it continued, competing for front page space with breakthroughs then being made in the Vietnam War peace talks in Paris. The efforts of the islanders to halt the lava flows received particular attention, with coverage in publications such as National Geographic.\n", "Because the eruptions occur with the volcano underwater, the form of lava typically erupted is pillow lava. Pillow lava is rounded balls of lava that was given very little time to cool due to immediate exposure to water. Water pressure prevents the lava from exploding upon contact with the cold ocean water, forcing it to simmer and solidify quickly. This stage is thought to last about 200,000 years, but lavas erupted during this stage make up only a tiny fraction of the final volume of the volcano. As time progresses, eruptions become stronger and more frequent.\n", "The volcanic events starting in March 2010 were considered to be a single eruption divided into phases. The first eruption phase ejected olivine basaltic andesite lava several hundred metres into the air in what is known as an effusive eruption. Ash ejection from this phase of the eruption was small, rising to no more than into the atmosphere.\n", "The 1991 spike is understood to be due to the volcanic eruption of Mt. Pinatubo in June of that year. Volcanoes affect atmospheric methane emissions when they erupt, releasing ash and sulfur dioxide into the air. As a result, photochemistry of plants is affected and the removal of methane via the tropospheric hydroxyl radical is reduced. However, growth rates quickly fell due to lower temperatures and global reduction in rainfall.\n", "Non-explosive eruptions of lava and less-violent explosive eruptions have occurred in and near the Yellowstone caldera since the last supereruption. The most recent lava flow occurred about 70,000 years ago, while a violent eruption excavated the West Thumb of Lake Yellowstone around 150,000 years ago. Smaller steam explosions occur as well: an explosion 13,800 years ago left a diameter crater at Mary Bay on the edge of Yellowstone Lake (located in the center of the caldera). Currently, volcanic activity is exhibited via numerous geothermal vents scattered throughout the region, including the famous Old Faithful Geyser, plus recorded ground-swelling indicating ongoing inflation of the underlying magma chamber.\n" ]
Why not use Gorilla-Glass for cutting boards?
Hard surfaces like glass ruin the edge on knives. Cutting boards are wood and plastic to allow better and faster chopping and slicing motions while avoiding bending of the blade edge. Don't use glass (or stone or ceramic or anything hard) cutting boards.
[ "Gorilla Glass is a brand of chemically strengthened glass developed and manufactured by Corning, now in its sixth generation, designed to be thin, light and damage-resistant. Gorilla Glass is unique to Corning, but close equivalents exist, including AGC Inc. Dragontrail and Schott AG Xensation.\n", "Gorilla Glass 3 was introduced at CES 2013. According to Corning, the material is up to three times more scratch-resistant than the previous version, with enhanced ability to resist deep scratches that typically weaken glass. The promotional material for Gorilla Glass 3 claims that it is 40% more scratch-resistant, in addition to being more flexible. The design of Gorilla Glass 3 was Corning's first use of atomic-scale modeling before the material was melted in laboratories, with the prediction of the optimal composition obtained through the application of rigidity theory.\n", "Gorilla Glass, an outgrowth of the 1960s Chemcor project, is a high-strength alkali-aluminosilicate thin sheet glass used as a protective cover glass offering scratch resistance and durability in many touchscreens. According to the book \"Steve Jobs\" by Walter Isaacson, Gorilla Glass was used in the first iPhone released in 2007.\n", "As of October 2017, some five billion devices globally contain Gorilla Glass. While dominating its market, Gorilla Glass faces varying competition from rivals such as Dragontrail and synthetic sapphire.\n", "When Gorilla Glass 3 was announced Corning indicated that areas for future improvements included reducing reflectivity and susceptibility to fingerprint smudges, and changing the surface treatments and the way it is finished. Antimicrobial Gorilla Glass with ionic silver, which is antibacterial, incorporated into its surface was demonstrated in early 2014.\n", "Captive western lowland gorillas have been observed to threaten each other with sticks and larger pieces of wood, while others use sticks for hygienic purposes. Some females have attempted to use logs as ladders. In another group of captive gorillas, several individuals were observed throwing sticks and branches into a tree, apparently to knock down leaves and seeds. Gorillas at Prague zoo have used tools in several ways, including using wood wool as \"slippers\" when walking on the snow or to cross a wet section of the floor.\n", "Gorilla Tape incorporates a three-layer construction: a weather-resistant outer shell, reinforced fabric backing, and an adhesive layer that is applied twice as thick as the adhesive found on duct tape, which \"Popular Science\" says allows it to better surround and grip uneven surfaces. To prevent premature tearing, the two layers of fabric backing are slightly offset, making the tape 145% stronger than duct tape, while still allowing it to be torn by hand.\n" ]
why do rich people have credit cards?
It makes more sense for rich people to have them. They can afford to hit all their payments. Credit cards aren't supposed to be for buying shit you can't afford.
[ "On the other hand, the use of a credit card, whose main purpose is similar to money, allows for the creation of highly detailed records about the card owner. Credit cards are therefore not privacy protecting. The main privacy advantage of money is that its users can remain anonymous. There are however other security and usability properties that make real world cash popular.\n", "For merchants, a credit card transaction is often more secure than other forms of payment, such as cheques, because the issuing bank commits to pay the merchant the moment the transaction is authorized, regardless of whether the consumer defaults on the credit card payment (except for legitimate disputes, which are discussed below, and can result in charges back to the merchant). In most cases, cards are even more secure than cash, because they discourage theft by the merchant's employees and reduce the amount of cash on the premises. Finally, credit cards reduce the back office expense of processing checks/cash and transporting them to the bank.\n", "This fact has necessitated the need for almost every citizen to have a credit card. However, many credit cards companies manage their perception to make sure that people continue to need credit cards, and control their perception so that many people do not fully understand what they are getting into. However, the fact that the average household in the United States is in over fifteen thousand dollars worth of debt never reaches the widespread public. Instead, they publicize how they will help if a card gets stolen, or that they have the lowest interest percentage compared to the other major competitors. But no company tells their customers that the promoted interest rate more than doubles if they do not pay the minimum balance on time. For instance, Discover's interest rate increases to 18.99% after the first minimum balance is not paid on time.\n", "Due to the problems of high inflation, the lack of high denomination notes, and the fact that many of the population do not have access to checks, or credit or debit cards, it is common to see citizens carrying a considerable amount of cash. (The highest denomination of Burmese currency kyat is 10 000 (~US$10.)) Credit cards are only rarely used in the city, chiefly in the more lavish hotels. Credit cards are also accepted in the major supermarket and convenience store chains.\n", "People are more likely to spend more and get into debt when they use credit cards vs. cash for buying products and services. This is primarily because of the transparency effect and consumer's \"pain of paying.\" The transparency effect refers to the fact that the further you are from cash (as in a credit card or another form of payment), the less transparent it is and the less you remember how much you spent. The less transparent or further away from cash, the form of payment employed is, the less an individual feels the “pain of paying” and thus is likely to spend more. Furthermore, the differing physical appearance/form that credit cards have from cash may cause them to be viewed as “monopoly” money vs. real money, luring individuals to spend more money than they would if they only had cash available.\n", "Credit cards offer an alternative method of payment to cash or check and make life simpler for many people; however, today there are over 600 million credit cards issued in the United States alone and four major credit card companies. It is no longer even possible to buy a car, get a home loan, or rent an apartment from many companies without a positive credit score.\n", "Credit card transactions now represent a large percentage of low value transactions on which credit card companies charge merchants. Most of such credit card transactions are more of a habit than an actual need for credit and to the extent that such purchases represent convenience or lack of planning to carry cash on the part of consumers, these transactions add a layer of unnecessary expense. However, debit or check card transactions are cheaper than processing paper checks.\n" ]
how did "cheater boxes" (cable descramblers) allow you to watch premium tv channels for free?
Way back when, television was an analog signal. More accurately, it was a *series* of analog signals that your 100%-analog color television could use to produce a picture. You have three signals for color (your TV only looked at one if it was black-and-white) and a "timing" signal that indicated when it should start drawing a new line. The "vertical hold" was a sometimes-manual synchronization to that signal. "Scrambling" was really just that. Some of the signals were inverted, some of them were switched. But, fundamentally, you couldn't *add* in junk or actually do significant *math* to obscure the signal, because televisions simply didn't have the ability to un-do that and produce a working picture for your paying consumer. Likewise, before relatively powerful integrated electronics became available, it wasn't economically feasible to give a customer a powerful computerized set-top box just to watch some television. So your "encryption" was a scheme with only a few variables. Throw off the synchronization here, swap a color field here, and it would make the picture "off" enough to be unwatchable. But, likewise, once someone figured out your mechanism, they just had to create a relatively simply "decoder" to bring that signal back. TLDR: Analog encryption wasn't terribly complicated, but it was analog, so it required *hardware* as opposed to something digital, which might be more complex, but also could be done with a wider variety of hardware. Nowadays, everything is digital (because computing power, even for high-definition video, is so cheap) so analog encryption/decryption isn't a thing.
[ "For customers in non-cabled areas, Virgin Media offered a branded set-top box for the Freeview digital terrestrial television service, called \"Free TV\", until December 2009 when it was discontinued. The set-top box was free to any customer taking the Bundle One subscription package or for an addition fee to other customers, up to five additional set-top boxes were available per account.\n", "\"Fully-loaded\" set-top boxes have been subject to legal controversies, especially noting that their user experiences made them accessible to end-users who may not always realize that they are actually streaming pirated content. In the United Kingdom, the Federation Against Copyright Theft (FACT) has taken court actions on behalf of rightsholders against those who market digital media players pre-loaded with access to copyrighted content. In January 2017, an individual seller plead not guilty to charges of marketing and distributing devices that circumvent technological protection measures. In March 2017, the High Court of Justice ruled that BT Group, Sky plc, TalkTalk, and Virgin Media must block servers that had been used on such set-top boxes to illegally stream Premier League football games. Later in the month, Amazon UK banned the sale of \"certain media players\" that had been pre-loaded with software to illegally stream copyrighted content. On 26 April 2017, the European Court of Justice ruled that the distribution of set-top boxes with access to unauthorized streams of copyrighted works violated the exclusive rights to communicate them to the public. In September 2017, a British seller of such boxes pled guilty to violations of the Copyright, Designs and Patents Act for selling devices that can circumvent effective technical protection measures.\n", "Originally, all channels could be received in the clear (ITC) and free of charge. In October 1984, the U.S. Congress passed the Cable Communications Act of 1984, which gave those using dishes the right to see signals for free unless they were scrambled, and required those who did scramble to make their signals available for a fee. Since cable channels could prevent reception by big dishes, other companies had an incentive to offer competition.\n", "The original idea was to persuade consumers to buy a modified television set with an inbuilt modem and a keypad remote control in order to access the service, but no more than a handful of models were ever marketed and they were prohibitively expensive. Eventually set-top boxes were made available, and some organisations made these available as part of their subscription, for example branded Tandata terminals were provided by the Nottingham Building Society for its customers, who could make financial transactions via Prestel.\n", "In the United States, the FCC has ruled that starting on July 1, 2007, consumers will be able to purchase a set-top box from a third-party company, rather than being forced to purchase or rent the set-top box from their cable company. This ruling only applies to \"navigation devices,\" otherwise known as a cable television set-top box, and not to the security functions that control the user's access to the content of the cable operator. The overall net effect on digital video recorders and related technology is unlikely to be substantial as standalone DVRs are currently readily available on the open market.\n", "After going through a name change, ON Subscription Television's broadcast signal was secured with a relatively simple analog scrambling method over the UHF spectrum; therefore, it was a popular target for those who chose to pirate the signal. In most U.S. markets where an over-the-air subscription television service operated, viewers could purchase descrambler kits from various specialty retailers or through mail order services advertised in magazines. The increased availability of cable television, coupled with the relative ease of obtaining descramblers contributed to a significant loss of revenue for the service. Station operators in Chicago estimated that there were two thefts of service through piracy for every one of their 90,000 subscribers in 1984.\n", "Set-top boxes were also made to enable closed captioning on older sets in North America, before this became a mandated inclusion in new TV sets. Some have also been produced to mute the audio (or replace it with noise) when profanity is detected in the captioning, where the offensive word is also blocked. Some also include a V-chip that allows only programs of some television content ratings. A function that limits children's time watching TV or playing video games may also be built in, though some of these work on main electricity rather than the video signal.\n" ]
what causes hair to have a terminal length?
And why does my beard stop at a certain length?!
[ "Having some hairs that are shorter than others is not necessarily a sign of breakage. Hair naturally sheds as it reaches the end of its growth cycle, and a new hair grows in its place; the average lifespan is about six years.\n", "In most people, scalp hair growth will halt due to follicle devitalization after reaching a length of generally two or three feet. Exceptions to this rule can be observed in individuals with hair development abnormalities, which may cause an unusual length of hair growth.\n", "The maximum terminal hair length depends on the length of the anagen (period of hair growth) for the individual. Waist-length hair or longer is only possible to reach for people with long anagen. The anagen lasts between 2 and 7 years, for some individuals even longer, and is followed by shorter catagen (transition) and telogen (resting) periods. At any given time, about 85% of hair strands are in anagen. The fibroblast growth factor 5 (FGF5) gene affects the hair cycle in mammals including humans; blocking FGF5 in the human scalp (by applying a herbal extract that blocked FGF5) extends the hair cycle, resulting in less hair fall and increased hair growth.\n", "Short anagen syndrome is a condition where hair does not grow beyond a short length, due to an unusually short duration of active hair growth (anagen phase). Most cases are associated with fine blond hair.\n", "In humans, terminal hairs are thick, long and dark, as compared with vellus hair. During puberty, the increase in androgenic hormone levels causes vellus hair to be replaced with terminal hair in certain parts of the human body. These parts will have different levels of sensitivity to androgens, primarily of the testosterone family.\n", "BULLET::::- Gradual thinning of hair with age is a natural condition known as involutional alopecia. This is caused by an increasing number of hair follicles switching from the growth, or anagen, phase into a resting phase, or telogen phase, so that remaining hairs become shorter and fewer in number.\n", "BULLET::::- Short anagen syndrome is characterized by an idiopathic and persistent telogen hair shedding, as well as the inability to grow hair long. This is a result of the shortening of the duration of anagen, meaning a greater number of telogen hairs at any given time, and is responsible for the majority of chronic TE cases.\n" ]
If air can both heat things up (friction) and cool them down...
Air/wind doesn't have any special heating/cooling properties. It follows the same laws of heat exchange equilibrium that everything else does: If you put something a room with warmer air, it'll get warmer. If you put something in a room with colder air, it will get cooler. But your car engine has something in common with your body: it produces heat while it's working. Accordingly, the air immediately surrounding your body or engine is hotter than the air in the surrounding environment. When you turn on a fan and feel cooler, all that's happening is that the fan is dispersing the heat cloud that's surrounding your body (the opposite of what a blanket does: trap the heat cloud so that the heat builds up). So the answer to your question is that moving wind across a thing doesn't have any special mechanism for cooling that thing down. But if that thing has a bunch of heat already around it (as anything that produces heat will), blowing this cloud away can keep the temperature of the object from getting out of control.
[ "At high speeds through the air, the object's kinetic energy is converted to heat through compression and friction. At lower speed, the object will lose heat to the air through which it is passing, if the air is cooler. The combined temperature effect of heat from the air and from passage through it is called the stagnation temperature; the actual temperature is called the recovery temperature. These viscous dissipative effects to neighboring sub-layers make the boundary layer slow down via a non-isentropic process. Heat then conducts into the surface material from the higher temperature air. The result is an increase in the temperature of the material and a loss of energy from the flow. The forced convection ensures that other material replenishes the gases that have cooled to continue the process.\n", "In all cases, the air has to be cooler than the object or surface from which it is expected to remove heat. This is due to the second law of thermodynamics, which states that heat will only move spontaneously from a hot reservoir (the heat sink) to a cold reservoir (the air).\n", "However, when air is hot, it tends to expand, which lowers its density. Thus, hot air tends to rise and transfer heat upward. This is the process of convection. Convection comes to equilibrium when a parcel of air at a given altitude has the same density as its surroundings. Air is a poor conductor of heat, so a parcel of air will rise and fall without exchanging heat. This is known as an adiabatic process, which has a characteristic pressure-temperature dependence. As the pressure gets lower, the temperature decreases. The rate of decrease of temperature with elevation is known as the adiabatic lapse rate, which is approximately 9.8 °C per kilometre (or 5.4 °F per 1000 feet) of altitude.\n", "However, when air is hot, it tends to expand, which lowers its density. Thus, hot air tends to rise and transfer heat upward. This is the process of convection. Convection comes to equilibrium when a parcel of air at a given altitude has the same density as its surroundings. Air is a poor conductor of heat, so a parcel of air will rise and fall without exchanging heat. This is known as an adiabatic process, which has a characteristic pressure-temperature curve. As the pressure gets lower, the temperature decreases. The rate of decrease of temperature with elevation is known as the adiabatic lapse rate, which is approximately 9.8 °C per kilometer (or 5.4 °F per 1000 feet) of altitude.\n", "However, when air is hot, it tends to expand, which lowers its density. Thus, hot air tends to rise and transfer heat upward. This is the process of convection. Convection comes to equilibrium when a parcel of air at a given altitude has the same density as its surroundings. Air is a poor conductor of heat, so a parcel of air will rise and fall without exchanging heat. This is known as an adiabatic process, which has a characteristic pressure-temperature curve. As the pressure gets lower, the temperature decreases. The rate of decrease of temperature with elevation is known as the adiabatic lapse rate, which is approximately 9.8 °C per kilometer (or 5.4 °F per 1000 feet) of altitude.\n", "Aerodynamic heating is the heating of a solid body produced by its high-speed passage through air (or by the passage of air past a test object in a wind tunnel), whereby its kinetic energy is converted to heat by skin friction on the surface of the object at a rate that depends on the viscosity and speed of the air. In science and engineering, it is most frequently a concern regarding meteors, reentry vehicles, and the design of high-speed aircraft.\n", "A surface loses heat through conduction, evaporation, convection, and radiation. The rate of convection depends on both the difference in temperature between the surface and the fluid surrounding it and the velocity of that fluid with respect to the surface. As convection from a warm surface heats the air around it, an insulating boundary layer of warm air forms against the surface. Moving air disrupts this boundary layer, or epiclimate, allowing for cooler air to replace the warm air against the surface. The faster the wind speed, the more readily the surface cools.\n" ]
Why don't we use deuterium in hydrogen powered cars? Wouldn't it be safer?
It would be equally safe but much much more expensive.
[ "Hydrogen fuel can provide motive power for liquid-propellant rockets, cars, boats and airplanes, portable fuel cell applications or stationary fuel cell applications, which can power an electric motor. The problems of using hydrogen fuel in cars arise from the fact that hydrogen is difficult to store in either a high pressure tank or a cryogenic tank.\n", "Hydrogen is extremely flammable. However this is mitigated by the fact that hydrogen rapidly rises and often disperses before ignition, unless the escape is in an enclosed, unventilated area. Demonstrations have shown that a fuel fire in a hydrogen-powered vehicle can burn out completely with little damage to the vehicle, in contrast to the expected result in a gasoline-fueled vehicle.\n", "Most proposed water-fuelled cars rely on some form of electrolysis to separate water into hydrogen and oxygen and then recombine them to release energy; however, because the energy required to separate the elements will always be at least as great as the useful energy released, this cannot be used to produce net energy.\n", "The use of hydrogen cars has been proposed as a means to reduce local air pollution and carbon emissions because hydrogen fuel cell cars emit clean exhaust. Hydrogen can be produced from natural gas, coal and renewable energy. However, as long as the majority of hydrogen continues to be produced by burning fossil fuels and transported in trucks, pollution is emitted by the hydrogen manufacturing process.\n", "The use of hydrogen fuel is another alternative under development in various countries, alongside, hydrogen vehicles though hydrogen is actually an energy storage medium, not a primary energy source, and consequently the use of a non-petroleum source would be required to extract the hydrogen for use. Though hydrogen is currently outperformed in terms of cost and efficiency by battery powered vehicles, there are applications where it would come in useful. Short haul ferries and very cold climates are two examples. Hydrogen fuel cells are about a third as efficient as batteries and double the efficiency of gasoline vehicles.\n", "The challenges facing the use of hydrogen in vehicles include chiefly its storage on board the vehicle. While the well-to-wheel efficiency for hydrogen from the least efficient manner of producing it (electrolysis) is less than 25 percent, it still exceeds that of vehicles based on internal combustion engines.\n", "A 2009 study at UC Davis, published in the \"Journal of Power Sources\", similarly found that, over their lifetimes, hydrogen vehicles will emit more carbon than gasoline vehicles. This agrees with a 2014 analysis. \"The Washington Post\" asked in 2009, \"[W]hy would you want to store energy in the form of hydrogen and then use that hydrogen to produce electricity for a motor, when electrical energy is already waiting to be sucked out of sockets all over America and stored in auto batteries\"? \"The Motley Fool\" stated in 2013 that \"there are still cost-prohibitive obstacles [for hydrogen cars] relating to transportation, storage, and, most importantly, production.\"\n" ]
Why did the Roman Pilum(Javelin) die out?
The javelin was a weapon peculiar to Mediterranean warfare, especially for Latin/Italian, Iberian and Celt-Iberian peoples (Sanz 21). The use of javelins (not always the *pilum*, later the *spiculum* and earlier a different type, but javelins are all basically the same in function) remained a mainstay of Roman infantry warfare for basically the entire Roman period. We keep digging them up even in the late Empire (Bishop & Coulston 200). Indeed, missile warfare became in some ways more prominent rather than less in the late Roman period, with Germanic groups also using javelins (such as the *ango*), and there was an increasing trend toward training recruits in various types of ranged warfare, also including archery and slinging (Rance 251-3). Javelins did not go away with the 'fall' of Rome either, and throwing spears (again, the Germanic *ango,* which was based on the *pilum*) pop up in the Merovingian period, though it appeared to fall out of use by the 7th century AD (Halsall 164-5). Archery became perhaps more significant in this period, as it certainly was later (166). I see no reason why any great developments in warfare (tactical or technological) should be responsible for this gradual fading away of the Mediterranean sword-and-javelin style of fighting. In my view, fighting styles shifted over time for reasons as much to do with society and culture as with technology and tactics. Perhaps the intermittent disappearance and re-use of phalanx-like tactics at various stages of European history might fit this bill: it's not as if shield-and-spear ever stopped being an effective weapons combination.* I think it is perfectly explicable by the massive shift over time in the culture of Western Europe, and the role of the javelin could be in many ways readily filled by archers and the multi-skilled soldiers of the early Medieval period (166). There is a tendency by Westerners to view changes in and the relative effectiveness of different military tactics and fighting styles from a 'technological' standpoint. For instance many casual observers tend to obsess over the exact size and shape and capabilities of the *gladius* and *scutum* in explaining Roman success and ignore the fact that the Roman army in the Mid-Republic was a highly trained, highly motivated force with hugely superior manpower reserves to its enemies. I suppose the point I am making is that shifts in military equipment and fighting styles do not necessarily have to be tactical or 'Darwinian' in any way, but can reflect changes in societies, cultures and approaches over time that are not necessarily 'superior', just different. *I am of course aware that the Romans beat the Macedonians and Seleucids, who had all-but-perfected the classical phalanx, but tactics, generalship and superior Roman resources are important factors in this. Libyan (and Carthaginian) spearmen performed usually very well, even against Roman legionaries, in the Punic Wars for instance. Later on the Romans began to re-adopt spear-based fighting styles once more, though the performance of the Mid to Late Republican Roman legions clearly demonstrate that the Mediterranean style of fighting could, well handled, deal with any enemy (though I'm not factoring the fluctuating dominance of cavalry warfare in the ancient to early modern periods in here). The reasons for the use and re-use of spear tactics are probably as much to do with the quality of recruits and training, and cultural shifts, as any 'tactical' necessity. Sources: M.C. Bishop & J.C.N Coulston, Roman Military Equipment: From the Punic Wars to the Fall of Rome (second edition), Oxford: Oxbow Books, 2006. Guy Halsall, Warfare and Society in the Barbarian West, 450-900, Abingdon, Oxon: Routledge, 2003. Philip Rance, "Battle" from The Cambridge History of Greek and Roman Warfare (Vol II), New York: Cambridge University Press, 2007. Quesada Sanz, F. ‘Not so different: individual fighting techniques and small unit tactics of Roman and Iberian armies’ in P. Francois, P. Moret, S. Pere-Nogues (eds) L’Hellenisation en mediterranee occidentale au temps des guerres puniqes. Actes du Colloque International de Toulouse, 31 mars-2 avril 2005. Pallas 70 (2006) 1-25.
[ "A spiculum is a late Roman spear that replaced the pilum as the infantryman's main throwing javelin around 250 AD. Scholars suppose that it could have resulted from the gradual combination of the pilum and two German spears, the angon and the bebra. As more and more Germans joined the Roman army, their culture and traditions became a driving force for change. The spiculum was better than the old pilum when used as a thrusting spear, but still maintained some of the former weapon's penetrative power when thrown.\n", "Vegetius mentions the spiculum in his military manual, but some scholars maintain that the spiculum was simply a different name for the pilum. Whatever the case, most historians accept that the spiculum evolved from the earlier javelins used by the Roman army.\n", "The pilum (plural \"pila\"; ) was a javelin commonly used by the Roman army in ancient times. It was generally about long overall, consisting of an iron shank about in diameter and long with a pyramidal head. The shank was joined to the wooden shaft by either a socket or a flat tang.\n", "The verutum, plural veruta (), was a short javelin used in the Roman army. This javelin was used by the \"velites\" for skirmishing purposes, unlike the heavier \"pilum\", which was used by the \"hastati\" and \"principes\" for weakening the enemy before advancing into close combat. The shafts were about long, substantially shorter than the \"pilum\", and the point measured about long. The \"verutum\" had either an iron shank like the \"pilum\" or a tapering metal head. It was sometimes thrown with the aid of a throwing strap, or \"amentum\".\n", "Although Romans often used the word \"pila\" to refer to all thrown javelins, the term \"pilum\" also means specifically the heavy Roman throwing javelin of the legions. Lighter, shorter javelins existed, such as those used by the \"velites\" and the early legions.\n", "The \"pilum\" (plural \"pila\") was a heavy javelin commonly used by the Roman army in ancient times. It was generally somewhat less than two metres long overall, consisting of a wooden shaft from which projected an iron shank about 7 mm in diameter and 60 cm long with a pyramidal head. The iron shank was socketed or, more usually, widened to a flat tang. A \"pilum\" usually weighed between two and four kilograms, with the versions produced during the empire era being somewhat lighter.\n", "In addition to short swords, Roman infantry typically carried a spear or other type of pole weapon. The most common was known as the javelin, a heavy spear that could be either thrown or thrusted. Similar in function to the javelin was the \"fuscina.\" Although not used by the Roman military, this fork-like trident was one of the most popular gladiator weapons. A version of the javelin that had a much longer and thinner tip was the \"pilum\", which could pierce armor or shields when thrown. Several \"pila\" could be thrown to initiate combat, disrupting the structure and defense of enemy armies and providing an opportunity for close combat, where the gladius would take over. The design of the \"pilum\" allowed it to become lodged in an enemy shield. Removing a \"pilum\" from a shield was often difficult and time consuming during combat. In fact, most were not reusable after removal.\n" ]
Are the ocean floors scattered with bones?
I saw an excellent infographic a while back illustrating a "whale fall"--what happens to a whale's body after it dies. I'll look for it. In the meantime, here's an article that goes more in depth about it: [Whale fall](_URL_1_) edit: My mistake, it wasn't an infographic. It was this [video](_URL_0_). Quite beautiful, actually. One whale can support a community of organisms for 50-75 years after death.
[ "The deposit in which the bones were found was a silty claystone. This was formed from sediments deposited during what seems to have been a rather cool phase of the Late Cretaceous: sea levels of the Western Interior Seaway at least were apparently very low for Mesozoic standards, though this may also have been due to strong tectonic uplift in the Cordilleran Overthrust Belt. The location was inland, with the Western Interior Seaway's coast at least 350 km (220 miles) away.\n", "The sea floor 15 feet below is dotted with live and healthy corals. It has many coral varieties, fish species, and amazing crustaceans, including the mantis shrimp, a type of shrimp that possesses a set of multi-colored exoskeleton.\n", "The floor covers an area of over . Thousands of animal bones and sea shells were found in this section, including Lithic, antler and bone artefacts. Three stone structures, likely indicative of residential use, were discovered. \n", "Vast areas of the ocean floor are covered with \"Globigerina\" ooze, dominated by the foraminiferous shells of \"Globigerina\" and other Globigerinina. The name was originally applied to mud collected from the bottom of the Atlantic Ocean when planning the location of the first transatlantic telegraph cables and it was mainly composed of the shells of \"Globigerina bulloides\".\n", "The interior floor is a mixture of level terrain mixed with rough ground where impacts have stirred up the surface. It is generally less rough in the eastern half, especially near the center. A small, bowl-shaped crater lies on the floor in the southeastern part of the interior, and the faint remnants of several other lesser craters can be observed in the surface.\n", "These reefs and broken shorelines are from a geologic folding of the Earth's crust, which brought many interesting marine fossils to the surface. Some good examples can be found on the southeast arm of Sucia Island. \n", "BULLET::::2. Very little bedrock is actually exposed on the ground surface, save at the western tip. The long, low, drumlin-like ridge which forms the heart of the island appears to be composed mainly of glacial drift which was probably laid down during the last ice age. The same is probably true of the two smaller hillocks to the east and west of it. In contrast, the sinuous isthmuses and spits which link them are composed of sea-sorted sand, shingles and cobbles. These are of post-glacial origin and it is clear that they are being continuously moulded by tidal currents.\n" ]
why water completely damages a cell phone when submerged.
Electronic circuits are designed to only allow electricity to pass through certain parts at certain times. That's how your phone works. It's a set of boolean functions (1 or 0/true or false). Electricity passes through chip, and it makes a decision such as "and/or". If it's 'and', it sends the signal one way, and if it's 'or', it sends it another way. After it does that, this step is repeated through other logic gates that have other functions that aren't and/or (not/or or any of the many other variants). Once you submerge it into water, it doesn't follow this designed 'trail', and the phone short-circuits. Because water is conductive, the electrical signals go wherever they can, and electronics can't handle that. To make something of a comparison; It's the same reason you get in a line when you're shopping. Imagine if all the customers just threw all their items onto the counter at the same time and talked over each other. The cashier wouldn't know what to do. That's what the submersion is.
[ "The phone has been specified to be dust, splash, and water resistant, however, it has not been certified with an IP Code and OnePlus suggests against submerging the device. Water damage is not covered by the warranty.\n", "Electric shock drownings are most commonly caused by improper electrical connections on boats and docks. By law, all connections near water are required to have working ground fault circuit interruption technology, GFCI. These devices break the electrical circuit if any stray current fails to return to the source connection. If GFCI devices are missing or faulty, it is possible for current to leak into the water. If a system is leaking current into the water, appliances will likely function as normal without any indication of a problem. Correctly functioning GFCI and ELCI devices will instantaneously detect the problem and disconnect the power source. \n", "Another potential cause for drowning is the presence of stray electrical power from a boat leaking into the water. This is known as electric shock drowning. Metal surfaces of a boat leaking power into the water can create zones of high-energy potential. Stray current entering salt water is less of a problem than the same situation in fresh water. Salt water is a good conductor and it carries current away to ground quickly. Fresh water is a poor conductor and when alternating current forms an electrical potential near a boat, the current can paralyze a swimmer. Stray electric current has caused many drownings, but post-mortem examinations will not link this problem to the death. The problem can be reduced by prohibiting swimming near boats connected to shore power and ensuring marinas comply with National Fire Protection Association Standard 303 for marinas.\n", "Water damage describes a large number of possible losses caused by water intruding where it will enable attack of a material or system by destructive processes such as rotting of wood, growth, rusting of steel, de-laminating of materials such as plywood, and many others.\n", "Subsequent aerial footage posted online showed a section of the dolosse breakwater completely underwater. Civil engineer So Yiu-kwan told Hong Kong media on 12 April 2018 that the water level, at the time the photos were taken, was about 1.74 mPD (metres above Principal Datum), but the maximum water level could reach 2.7 mPD. He said the dolosse would offer no wave protection if entirely submerged, and further alleged that they had been installed backwards.\n", "Water flooded in, and \"Telephone\" sank so that only the bow was visible above the water’s surface. The steamer appeared to be a total loss, but remained hanging on the breakwater for about a week, which was enough time to raise the vessel. Once \"Telephone\" was raised, the damage appeared to be not so severe.\n", "Significantly, victims drown quietly underwater without alerting anyone to the fact that there is a problem and are typically found on the bottom as shown in the staged image at the right. Survivors of shallow water blackout are typically puzzled as to why they blacked out. Pool lifesavers are trained to scan the bottom for the situation shown.\n" ]
Why didn't the Muslims, Indians, Chinese, etc launch colonial efforts on the scale of the Europeans? Or more specifically, what caused the massive rise in colonial efforts in Europe?
There were many economic factors such as competition. The Ottoman Empire had risen to prominence leading up to period of European colonization. They controlled many of the trade routes to the east, and Europeans would have had to pay to use them. So, while it was obviously an economic risk to send ships out into the unknown, the conditions of the time made it a worthwhile gamble and there was a snowball effect once resources started coming back from the New World. In the absence of an empire in Western Europe, there was great competition between powers which sped up the race to colonize. China was already powerful during this period (Ming dynasty). You had the Mughal Empire in northern India, Ottoman Empire, etc. I am not trying to say that these established powers did not try to expand using new strategies, but just think about what risks an internet start-up can take today compared to an established company like IBM or Microsoft, and the kind of disruptive economic growth happens as a result. In addition to the economic factors, you must consider the geographic advantage that European countries had at the time. They were better positioned to send out expeditions than any of the powers in the east. It was not as feasible for, say China or Japan to send ships over the Pacific Ocean because of the long journey. They could and did take ships other places, but these places often had established powers and were not nearly as easy to conquer as the Americas proved to be. Meanwhile, after Gibraltar fell from Islamic control towards the end of the 1400s, European ships were able to get safe passage out of the Mediterranean Sea and then further west. This brings me to the most important factor in this period of colonization, and the reason why the Americas were a desirable place to colonize: The vast majority of Native Americans were killed by germs that the Europeans brought over. This effect streamlined the process of domination in a way that the Eastern powers could only dream of. The Mongol Empire certainly dominated Asia in dramatic fashion years before this period of European colonization, but they failed to conquer Japan in two separate campaigns. Just think of what they could have accomplished with the aid of these killer germs!
[ "With the Ottoman Caliphate in a seemingly constant military conflict with Western Europe at their mutual borders, missionary activity in Western Europe was virtually non-existent until the dramatic changing of the European political map in the 20th century. This along with the decline of the Ottoman Empire in the same time frame paved way for a subsequent mass immigration of Muslim peoples from the Muslim World into Western Europe after World War I. With the arrival of this new immigrant population, Islamic missionary activity in Western Europe soon followed thereafter.\n", "In the 13th and 14th centuries, a number of Europeans, many of them Christian missionaries, had sought to penetrate into China. The most famous of these travelers was Marco Polo. But these journeys had little permanent effect on East-West trade because of a series of political developments in Asia in the last decades of the 14th century, which put an end to further European exploration of Asia. The Yuan dynasty in China, which had been receptive to European missionaries and merchants, was overthrown, and the new Ming rulers were found to be unreceptive of religious proselytism. Meanwhile, the Turks consolidated control over the eastern Mediterranean, closing off key overland trade routes. Thus, until the 15th century, only minor trade and cultural exchanges between Europe and Asia continued at certain terminals controlled by Muslim traders.\n", "Beginning with the 15th century, colonialism by European powers (particularly, but not exclusively, Britain, Spain, Portugal, France, the Netherlands, Italy, Germany, Russia, Austria, and Belgium) profoundly affected Muslim-majority societies in Africa, Europe, the Middle East and Asia. Colonialism was often advanced by conflict with mercantile initiatives by colonial powers and caused tremendous social upheavals in Muslim-dominated societies.\n", "As a result of the Pax Mongolica, Europeans, such as Marco Polo, began to venture further and further east. This led to the increased awareness of Indian and even Chinese culture and civilization within the European tradition. Technological advances were also made, such as the early flight of Eilmer of Malmesbury (who had studied Mathematics in 11th century England), and the metallurgical achievements of the Cistercian blast furnace at Laskill.\n", "European Colonialism, that was accompanied by Christian evangelism and often by violence, led to the suppression of indigenous religions in the territories conquered or usurped by the Europeans. The Spanish colonization of the Americas largely destroyed the Aztec and Inca civilization. However, Colonialism (and later European Imperialism) as a whole were not motivated by religious zeal; the suppression of the indigenous religions was their side result, not their main purpose. Only partial aspects, like the Goa Inquisition, bear resemblance to the persecutions that occurred on the European continent. By the 18th century, persecutions of unsanctioned beliefs had been reduced in most Europeans countries to religious discrimination, in the form of legal restrictions on those who did not accept the official faith. This often included being barred from higher education, or from participation in the national legislature. In colonized nations, attempts to convert native peoples to Christianity became more encouraging and less forceful. In British India during the Victorian era, Christian converts were given preferential treatment for governmental appointments.\n", "In the 19th century, European colonization of the Muslim world coincided with the retreat of the Ottoman Empire, the French conquest of Algeria (1830), the disappearance of the Moghul Empire in India (1857), the Russian incursions into the Caucasus (1828) and Central Asia.\n", "17th-century Missionary activity in Asia and the Americas grew strongly, put down roots, and developed its institutions, though it met with strong resistance in Japan in particular. At the same time Christian colonization of some areas outside Europe succeeded, driven by economic as well as religious reasons. Christian traders were heavily involved in the Atlantic slave trade, which had the effect of transporting Africans into Christian communities. A land war between Christianity and Islam continued, in the form of the campaigns of the Habsburg Empire and Ottoman Empire in the Balkans, a turning point coming at Vienna in 1683. The Tsardom of Russia, where Orthodox Christianity was the established religion, expanded eastwards into Siberia and Central Asia, regions of Islamic and shamanistic beliefs, and also southwest into the Ukraine, where the Uniate Eastern Catholic Churches arose.\n" ]
Why is there only a fixed geostationary orbit?
I like to think about this mathematically: If we require that the satellite is undergoing uniform circular motion, the gravitational force must supply all of the centripetal force: F = GmM/r^2 = mv^2 /r (M is the mass of the Earth, and m is the mass of your satellite) which we can solve to get a relation between r and v, our possible values of orbital radius and velocity for uniform circular motion: v^2 = GM/r This is the relation that tells us we can still have uniform circular motion if we increase the radius, we have to decrease the velocity, and if we decrease the radius, we have to increase the velocity. There are an infinite number of uniform circular motion solutions to the system: each possible pairing (r, v). Now we want the satellite to be geostationary/geosynchronous. This means that we impose another requirement, that the period of the orbit is 24 hours: T = 2 pi r/v = 24 hours Well, this constitutes another relation between r and v, with its own infinite family of solutions (r, v). Combining these equations gives us 2 linearly independent equations with 2 unknowns, which is a system of equations with only one solution. Thus, there is only one possible set (r, v) that gives us geosynchronous orbits.
[ "A geostationary orbit is a particular type of geosynchronous orbit, which has an orbital period equal to Earth's rotational period, or one sidereal day (23 hours, 56 minutes, 4 seconds). Thus, the distinction is that, while an object in geosynchronous orbit returns to the same point in the sky at the same time each day, an object in geostationary orbit never leaves that position. Geosynchronous orbits move around relative to a point on Earth's surface because, while geostationary orbits have an inclination of 0° with respect to the Equator, geosynchronous orbits have varying inclinations and eccentricities.\n", "A perfectly stable geostationary orbit is an ideal that can only be approximated. In practice the satellite drifts out of this orbit because of perturbations such as the solar wind, radiation pressure, variations in the Earth's gravitational field, and the gravitational effect of the Moon and Sun, and thrusters are used to maintain the orbit in a process known as station-keeping.\n", "A geostationary orbit (or geostationary Earth orbit/GEO) is a geosynchronous orbit directly above the Earth's equator (0° latitude), with a period equal to the Earth's rotational period and an orbital eccentricity of approximately zero (i.e. a \"circular orbit\"). An object in a geostationary orbit appears motionless, at a fixed position in the sky, to ground observers. Launchers often place communications satellites and weather satellites in geostationary orbits, so that the satellite antennas that communicate with them do not have to move to track them, but can point permanently at the position in the sky where the satellites stay. Due to the constant 0° latitude and circularity of geostationary orbits, satellites in GEO differ in location by longitude only.\n", "BULLET::::- Geosynchronous orbit (GSO) and geostationary orbit (GEO) are orbits around Earth matching Earth's sidereal rotation period. Although terms are often used interchangeably, technically a geosynchronous orbit matches the Earth's rotational period, but the definition does not require it to have zero orbital inclination to the equator, and thus is not stationary above a given point on the equator, but may oscillate north and south during the course of a day Thus, a geostationary orbit is defined as a geosynchronous orbit at zero inclination. Geosynchronous (and geostationary) orbits have a semi-major axis of . This works out to an altitude of 35,786 km (22,236 mi). Both complete one full orbit of Earth per sidereal day (relative to the stars, not the Sun).\n", "A special case of the geosynchronous orbit, the geostationary orbit, has an eccentrity of zero (meaning the orbit is circular), and an inclination of zero in the Earth-Centered, Earth-Fixed coordinate system (meaning the orbital plane is not tilted relative to the Earth's equator). The \"ground track\" in this case consists of a single point on the Earth's equator, above which the satellite sits at all times. Note that the satellite is still orbiting the Earth — its apparent lack of motion is due to the fact that the Earth is rotating about its own center of mass at the same rate as the satellite is orbiting.\n", "A geostationary orbit, often referred to as a geosynchronous equatorial orbit (GEO), is a circular geosynchronous orbit above Earth's equator and following the direction of Earth's rotation. An object in such an orbit appears motionless, at a fixed position in the sky, to ground observers. Communications satellites and weather satellites are often placed in geostationary orbits, so that the satellite antennae (located on Earth) that communicate with them do not have to rotate to track them, but can be pointed permanently at the position in the sky where the satellites are located. Using this characteristic, ocean-color monitoring satellites with visible and near-infrared light sensors (e.g. GOCI) can also be operated in geostationary orbit in order to monitor sensitive changes of ocean environments.\n", "Satellites in geostationary orbit must all occupy a single ring above the equator. The requirement to space these satellites apart to avoid harmful radio-frequency interference during operations means that there are a limited number of orbital \"slots\" available, and thus only a limited number of satellites can be operated in geostationary orbit. This has led to conflict between different countries wishing access to the same orbital slots (countries near the same longitude but differing latitudes) and radio frequencies. These disputes are addressed through the International Telecommunication Union's allocation mechanism. In the 1976 Bogotá Declaration, eight countries located on the Earth's equator claimed sovereignty over the geostationary orbits above their territory, but the claims gained no international recognition.\n" ]
How do we know what we know about Custer's last stand? Are our sources exclusively native? Custer has a reputation as a reckless general and a political opportunist- how much of this was contemporary, vs after the fact? Should he have seen it coming? What were the battle's lasting repercussions?
This is kind of a Thanksgiving version of an answer since I am not at home, don't have access to my books and am writing purely from memory. Should it happen that I have the time and energy to more adequately address *all* of your questions at some later date --like maybe tomorrow?-- I will. With regard to whether or not Custer should have seen it coming, the answer is definitively yes. Virtually all of his scouts (an assortment of Crows and Arikaras as well as some old time traders like Charley Reynolds and Mitch Bouyer) repeatedly told him --as the 7th cavalry progressed from the Yellowstone, down the Rosebud and up to the divide separating it from the Little Bighorn-- that there was sign of thousands of horses and travois having passed through the area and converging on the Little Bighorn. All of the scouts would also have been very aware that the Lakota were holding a great council, as they traditionally did every year, and would have known that they had moved it to the Little Bighorn (or "Greasy Grass" as the Indians knew it) from the Black Hills under pressure from gold-seekers and a US government policy of official indifference to their treaty rights, which is just to say that they would have had one more reason to be hostile. The scouts would also have known that among the thousands of warriors camped along the Greasy Grass were a handful of known "hostiles" such as Crazy Horse, Gall, Sitting Bull, American Horse and Two Moons, a Cheyenne war chief who'd seen his wife and children killed by Custer's forces on the Washita in 1868. Custer would have had zero reason to expect anything less than a fight to the death from these men, and while the 7th Cavalry did contain a number of new recruits, many of its veterans would have known that they could expect no mercy from the hostiles. According to several sources I've read, the Arikara and Crow scouts who did not flee immediately before the battle (there were a handful who wisely got the hell out of there) began singing their death songs in the predawn hours as Custer deployed his forces. The upshot is that Custer had plenty of warning that he was walking into a deathtrap and, given his experience as an Indian fighter, certainly should have known better. As for why he did not, there are several possibilities. One is that he was relying on his past experience, as on the Washita, which told him that an early dawn attack against a sleeping Indian village could yield good results if it were conducted with speed and aplomb. Another, concomitant factor, may have been his refusal to acknowledge the actual numbers of Lakota and Northern Cheyenne camped along the Little Bighorn. While Custer certainly knew that he was taking a big chance --he had high political ambitions and felt that a great victory could propel him, ultimately, to the presidency-- it's not clear that he recognized that he was taking on 3-5k (possibly more) Lakota and Cheyenne warriors even though, had he listened to his scouts, he clearly should have. Ultimately then, no matter how one slices it, Custer had access to plenty of good intelligence as to the disposition and numbers of the Lakota and Cheyenne camped along the Greasy Grass and definitely should have known that he had zero chance of victory.
[ "However, Custer's reputation had been damaged. While attempting to restore his military prestige in the U.S. Army, Col. Custer was killed in action at the Battle of the Little Big Horn. Belknap had allowed the sale of superior military weapons to hostile Native Americans at trader posts, while having supplied soldiers in the U.S. Army defective military weapons. This upset the balance of firepower between Indians and U.S. soldiers, and may have contributed to the defeat of the U.S. military at the Battle of Little Big Horn.\n", "Criticism of Custer was not universal. While investigating the battlefield, Lieutenant General Nelson A. Miles wrote in 1877, \"The more I study the moves here [on the Little Big Horn], the more I have admiration for Custer.\" Facing major budget cutbacks, the U.S. Army wanted to avoid bad press and found ways to exculpate Custer. They blamed the defeat on the Indians' alleged possession of numerous repeating rifles and the overwhelming numerical superiority of the warriors.\n", "George Armstrong Custer (1839–1876) was a United States Army cavalry commander in the American Civil War and the Indian Wars. He was defeated and killed by the Lakota, Northern Cheyenne, and Arapaho tribes at the Battle of the Little Bighorn. More than 30 movies and countless television shows have featured him as a character. \n", "Custer and the men under his command took up positions on a hill near the native encampment known as Battle Ridge. Under the leadership of Crazy Horse, the native warriors decimated Custer's soldiers, forcing a small remnant of his command to defend themselves at a spot now known as Last Stand Hill. Custer and his men were massacred by the combined Sioux and Cheyenne force in what has become known as one of the worst defeats in American military history. Following the battle, the United States increased the size of its army and began a campaign to hunt down the large force of native warriors that had carried out the massacre.\n", "Custer was now virtually surrounded, his command in an ever-shrinking circle, as every side was charged and hit with shells. Historian Eric J. Wittenberg described the general's predicament as \"Custer's First Last Stand\", foreshadowing his famous demise at the Battle of Little Bighorn. Custer, suspecting that his command would soon be overrun and concerned that his flag would be captured, tore it from its staff when the flag-bearer was hit and hid it within his coat. Sheridan at this point heard the firing from Custer's direction and realized he needed help. He charged with Devin's and Merritt's brigades, pushing Hampton's men back all the way to the station, while Gregg's brigade was ordered to swing into Fitzhugh Lee's exposed right flank, thus pushing him back. Hampton fell back to the west, Lee to the east, and the battle ended for the day with the Federals in possession of Trevilian Station. Custer's brigade had suffered 361 casualties, including more than one half of the 5th Michigan. When Sheridan asked Custer if he had lost his colors, he pulled them from his coat and exclaimed, \"Not by a damned sight!\"\n", "BULLET::::- Lt. Colonel George Armstrong Custer, (1839–1876) was a United States Army officer and cavalry commander in the American Civil War and the Indian Wars. Defeated and killed during the Battle of the Little Bighorn in Southeast Montana. Custer's defeat made him one of the most famous military figures in American history.\n", "Other historians claim that Custer never approached the river, but rather continued north across the coulee and up the other side, where he gradually came under attack. According to this theory, by the time Custer realized he was badly outnumbered, it was too late to break back to the south where Reno and Benteen could have provided assistance. Two men from the 7th Cavalry, the young Crow scout \"Ashishishe\" (known in English as Curley) and the trooper Peter Thompson, claimed to have seen Custer engage the Indians. The accuracy of their recollections remains controversial; accounts by battle participants and assessments by historians almost universally discredit Thompson's claim.\n" ]
the difference between an hmo insurance plan and a ppo insurance plan, or different insurance plans in general, i suppose.
Ok. **HMO** = Health Maintenance Organization. It's where you have one doctor who oversees your general care: your Primary Care Physician [PCP]. Your PCP is the one you see most often, and who is most familiar with your situation. The PCP determines if you need to see a specialist for lab work or additional services, and will write a referral to those other physicians or facilities. If you go to one of them *without* a referral, your insurance pays considerably less (if at all) and you have to pay out of pocket. HMOs tend to cost less per month, and have a lower deductible. (A deductible is an annual minimum amount that you have to pay out of pocket before the insurance kicks in for certain types of treatment) **PPO** = Preferred Provider Organization. Unlike with an HMO, you do not have a PCP. Instead, there is a list of preferred providers within the network that you may visit as you see fit without being penalized. You can also typically see a doctor who is not on that list and still be covered (tho' not as well). PPOs give greater freedom to see who you want, but tend to cost a bit more per month and frequently have a higher deductible than HMOs. **Indemnity** = Pay for service. Indemnity plans are mostly a thing of the past, tho' some people might still have access. They let you see any provider without penalty, and do not require you to get referrals or select a PCP. They might require you to pay for the services you receive out of your own pocket, and then the insurance company will reimburse you afterwards. And there's typically a deductible involved.
[ "A Unit-Linked Insurance Plan is essentially a combination of insurance and an investment vehicle. A portion of the premium paid by the policyholder is utilized to provide insurance coverage to the policyholder and the remaining portion is invested in equity and debt instruments. The aggregate premiums collected by the insurance company providing such plans is pooled and invested in varying proportions of debt and equity securities in a similar manner to mutual funds. Each policyholder has the option to select a personalized investment mix based on his/her investment needs and risk appetite.\n", "Many insurance companies offer policies with a guaranteed interest rate plus a non-guaranteed dividend. Each insurance company’s dividend is determined by its claims, investment performance, and administrative expenses. Some companies have a record of consistently paying annual dividends for over 100 years. Several insurance companies offer the option of having a portion of the return based on the performance of an equity index.\n", "The plan enables a participant dual to fund a tax-exempt account for medical expenses incurred before an associated 'high deductible' insurance plan begins to cover those expenses. The individual pairs the MSA with a 'catastrophic insurance' plan, which has lower premiums than plans with lower deductibles.\n", "Group policies may have provisions for non-restricted or open enrollment periods and underwriting may be required. Group plans may or may not be guaranteed renewable or tax qualified. Some group plans include language allowing the insurance company to replace the policy with a similar policy and to change the premiums at that time. Some group plans can be canceled by the insurance company. To compensate for the higher insurance risk group plans may have higher deductibles and lower benefits than individual plans. Some group plans have a 3 ADL (activities of daily living) requirement for nursing care.\n", "Most policies pay benefits when the policyholder needs help with two or more of six ADLs or when a cognitive impairment is present. According to the US Department of Health and Human Services all tax-qualified long-term care insurance plans have the same trigger.\n", "More recently, models created by insurance companies have arisen. The insurance model is similar to the broker model except that as the peer-to-peer provider is the actual insurance company. If the pool is insufficient to pay for the claims of its members, the insurance carrier pays the excess from its retained premiums and reinsurance. Conversely, if the pool is \"profitable\" (i.e. has few claims), the \"excess\" is given back to the pool or to a cause the pool members care about. Peer-to-Peer insurers take a flat fee for running the operations of the insurance enterprise. The fee is not dependent upon how many (or how few) paid claims there are.\n", "The bill bases the publicly authorized insurance plan fees on industry averages, so there is no clear economic competitive advantage versus existing private insurance. The health insurance subsidy is available to anyone with a qualifying level of income buying insurance from the exchange regardless of whether they choose a public or private plan. A poll done by \"Penn, Schoen and Berland Associates\" for the AARP stated that only 37% of Americans correctly identified the definition of the 'public option' being proposed, numbers very close to respondents guessing randomly among answers.\n" ]
how come when stars explode, they gush their matter out in 2 dimensions?
Doesn't that image [look familiar](_URL_0_)? The spectral matter is chasing the magnetic field.
[ "These interesting objects are born from once-large stars that grew to four to eight times the size of our own sun before exploding in catastrophic supernovae. After such an explosion blows a star's outer layers into space, the core remains—but it no longer produces nuclear fusion. With no outward pressure from fusion to counterbalance gravity's inward pull, the star condenses and collapses in upon itself.\n", "The collapse may be stopped by the degeneracy pressure of the star's constituents, allowing the condensation of matter into an exotic denser state. The result is one of the various types of compact star. Which type forms depends on the mass of the remnant of the original star left after the outer layers have been blown away. Such explosions and pulsations lead to planetary nebula. This mass can be substantially less than the original star. Remnants exceeding are produced by stars that were over before the collapse.\n", "Some of these collapsing stars can be particularly massive, and can emit large quantities of ionizing ultraviolet radiation. An example of this is seen with the Trapezium cluster. Over time the ultraviolet light from the massive stars at the center of the nebula will push away the surrounding gas and dust in a process called photo evaporation. This process is responsible for creating the interior cavity of the nebula, allowing the stars at the core to be viewed from Earth. The largest of these stars have short life spans and will evolve to become supernovae.\n", "Stars with initial masses between about 25 and 90 times the sun develop cores large enough that after a supernova explosion, some material will fall back onto the neutron star core and create a black hole. In many cases this reduces the luminosity of the supernova, and above the star collapses directly into a black hole without a supernova explosion. However, if the progenitor is spinning quickly enough, the infalling material generates relativistic jets that emit more energy than the original explosion. They may also be seen directly if beamed towards us, giving the impression of an even more luminous object. In some cases these can produce gamma-ray bursts, although not all gamma-ray bursts are from supernovae.\n", "Observations of the exploded star through the Hubble telescope have shown that, despite the original belief that the remnants were expanding in a uniform manner, there are high velocity outlying eject knots moving with transverse velocities of 5,500−14,500 km/s with the highest speeds occurring in two nearly opposing jets. When the view of the expanding star uses colors to differentiate materials of different chemical compositions, it shows that similar materials often remain gathered together in the remnants of the explosion.\n", "The temporary star expands after the impact displaying an intense increase in light, after all molecular reactions have taken place the light is replaced by a hollow shell of gas or possibly a planetary nebula, and eventually dissipates into space. Bickerton explains this bright temporary star by saying that it doesn't disappear due to cooling, but that it was too hot to hold together.\n", "When stars die, supernova explosions, similarly, drive blast waves that can reach even larger sizes, with expansion velocities up to several hundred km s. Stars in OB associations are not gravitationally bound, but they drift apart at small speeds (of around 20 km s), and they exhaust their fuel rapidly (after a few millions of years). As a result, most of their supernova explosions occur within the cavity formed by the stellar wind bubbles. These explosions never form a visible supernova remnant, but instead expend their energy in the hot interior as sound waves. Both stellar winds and stellar explosions thus power the expansion of the superbubble in the interstellar medium.\n" ]
Why did Vladimir I of Kievan Rus embrace Byzantine Orthodoxy rather than Catholicism?
Adding to the question, I just today read ("The Western Heritage since 1300 AP* Edition), that not only were there Catholic and Orthodox representatives plying for religious control of Russia, but there were also Jewish and Muslim representatives too. Was there any reason to choosing one over the other? Were Jews and Muslims stigmatized like they were in the rest Europe?
[ "In 988, Vladimir of Kievan Rus' rejected Slavic religion and he and his subjects were officially baptised into the Eastern Orthodox Church, then the state religion of the Byzantine Empire. According to legend, Vladimir sent delegates to foreign states to determine what was the most convincing religion to be adopted by Kiev. Joyfulness and beauty were the primary characteristics of pre-Christian Slavic ceremonies, and the delegates sought for something capable of matching these qualities. They were crestfallen by the Islamic religion of Volga Bulgaria, where they found \"no joy ... but sorrow and great stench\", and by Western Christianity (then the Catholic Church) where they found \"many worship services, but nowhere ... beauty\". Those who visited Constantinople were instead impressed by the arts and rituals of Byzantine Christianity. According to the \"Primary Chronicle\", after the choice was made Vladimir commanded that the Slavic temple on the Kievan hills be destroyed and the effigies of the gods be burned or thrown into the Dnieper. Slavic temples were destroyed throughout the lands of Kievan Rus' and Christian churches were built in their places.\n", "Kievan Rus' is important for its introduction of a Slavic variant of the Eastern Orthodox religion, dramatically deepening a synthesis of Byzantine and Slavic cultures that defined Russian culture for the next thousand years. The region adopted Christianity in 988 by the official act of public baptism of Kiev inhabitants by Prince Vladimir I, who followed the private conversion of his grandmother. Some years later the first code of laws, Russkaya Pravda, was introduced by Yaroslav the Wise. From the onset the Kievan princes followed the Byzantine example and kept the Church dependent on them, even for its revenues, so that the Russian Church and state were always closely linked.\n", "In 988 East Slavic state of Kievan Rus' was converted to the Eastern form of Christianity by Vladimir I of Kiev. Following the East-West Schism between the Roman and Byzantine Churches, the form of Christianity that Kievan Rus followed became known as Eastern Orthodox Church. In 1241, Kievan Rus was conquered by the Mongols. Over the centuries, the parts of Rus that would one day become Ukraine and Belarus were absorbed by Poland. Within the mostly Roman Catholic Polish state, the native Orthodox population and Church of the former lands of Ruthenia were pressured to transfer their allegiance from the Patriarch of Constantinople to the Pope of Rome. Between 1595-1596, the Union of Brest saw the creation of the Uniate Church (later the Ukrainian Greek Catholic Church) in Ruthenia. Like other Eastern Catholic Churches, the Uniate Church maintained the liturgical, theological and devotional traditions of the Orthodox Church despite its new allegiance to Rome.\n", "Vladimir's choice of Eastern Christianity may also have reflected his close personal ties with Constantinople, which dominated the Black Sea and hence trade on Kiev's most vital commercial route, the Dnieper River. Adherence to the Eastern Church had long-range political, cultural, and religious consequences. The church had a liturgy written in Cyrillic and a corpus of translations from Greek that had been produced for the Slavic peoples. This literature facilitated the conversion to Christianity of the Eastern Slavs and introduced them to rudimentary Greek philosophy, science, and historiography without the necessity of learning Greek (there were some merchants who did business with Greeks and likely had an understanding of contemporary business Greek). In contrast, educated people in medieval Western and Central Europe learned Latin. Enjoying independence from the Roman authority and free from tenets of Latin learning, the East Slavs developed their own literature and fine arts, quite distinct from those of other Eastern Orthodox countries. (See Old East Slavic language and Architecture of Kievan Rus for details). Following the Great Schism of 1054, the Rus' church maintained communion with both Rome and Constantinople for some time, but along with most of the Eastern churches it eventually split to follow the Eastern Orthodox. That being said, unlike other parts of the Greek world, Kievan Rus' did not have a strong hostility to the Western world.\n", "However it was only by the 10th century that the emerging state, the Kievan Rus', became influenced by the Byzantine Empire; the first known conversion was by the Princess Saint Olga who came to Constantinople in 945 or 957. Several years later, her grandson, Knyaz Vladimir baptised his people in the Dnieper River. This began a long history of the dominance of the Eastern Orthodoxy in Ruthenia (Ukraine).\n", "Before the tenth century, Russians practised Slavic religion. As recalled by the \"Primary Chronicle\", Orthodox Christianity was made the state religion of Kievan Rus' in 987 by Vladimir the Great, who opted for it among other possible choices as it was the religion of the Byzantine Empire. Since then, religion, mysticism and statehood remained intertwined elements in Russia's identity. The Russian Orthodox Church, perceived as the glue consolidating the nation, accompanied the expansion of the Russian Empire in the eighteenth century. Czar Nicholas I's ideology, under which the empire reached its widest extent, proclaimed \"Orthodoxy, autocracy and nation\" (\"Pravoslavie\", \"samoderzhavie\", \"narodnost\"') as its foundations. The dominance of the Russian Orthodox Church was sealed by law, and, as the empire incorporated peoples of alternative creeds, religions were tied to ethnicities to skirt any issue of integration. Until 1905, only the Russian Orthodox Church could engage in missionary activity to convert non-Orthodox people, and apostasy was treated as an offense punishable by law. Catholicism, Islam and other religions were tolerated only among outsider (\"inoroditsy\") peoples but forbidden from spreading among Russians.\n", "The Christianization of Kievan Rus' took place in several stages. In early 867, Patriarch Photius of Constantinople announced to other Orthodox patriarchs that the Rus', baptised by his bishop, took to Christianity with particular enthusiasm. Photius's attempts at Christianizing the country seem to have entailed no lasting consequences, since the Primary Chronicle and other Slavonic sources describe the tenth-century Rus' as firmly entrenched in paganism. Following the Primary Chronicle, the definitive Christianization of Kievan Rus' dates from the year 988 (the year is disputed), when Vladimir the Great was baptized in Chersonesus and proceeded to baptize his family and people in Kiev. The latter events are traditionally referred to as baptism of Rus' (, ) in Russian and Ukrainian literature.\n" ]
how come humans seem to be the only animal that require whiping their ass after shitting?
You might not like the answer. Other animals don't need to wipe because they can reach around and clean themselves with their tongue. They still clean themselves as needed, I'm surprised you haven't seen the dog doing it.
[ "Whips are generally used on animals to provide directional guidance or to encourage movement. Some whips are designed to control animals by imparting discomfort by tapping or pain by a full-force strike that produces pain compliance. Some whips provide guidance by the use of sound, such as cracking of a bullwhip. Other uses of whips are to provide a visual directional cue by extending the reach and visibility of the human arm.\n", "The majority of whips are designed for use on animals, although whips such as the \"cat o' nine tails\" and knout were specifically developed for flagellation as a means of inflicting corporal punishment or torture on human targets. Certain religious practices and BDSM activities involve the self-use of whips or the use of whips between consenting partners. Misuse on animals may be considered animal cruelty, and misuse on humans may be viewed as assault.\n", "A whip is a tool which was traditionally designed to strike animals or people to aid guidance or exert control over animals or other people, through pain compliance or fear of pain, although in some activities, whips can be used without use of pain, such as an additional pressure aid or visual directional cue in equestrianism. Whips are generally of two types, either a firm stick designed for direct contact, or a flexible whip that requires a specialized swing to be effective, but has a longer reach and greater force, but may have less precision. There are also whips which combine both a firm stick (the stock or handle) and a flexible line (the lash or thong), such as hunting whips.\n", "Whip use by sound never or rarely strikes the animal; instead, a long, flexible whip is cracked to produce a very sharp, loud sound. This usage also functions as a form of operant conditioning: most animals will flinch away from the sound instinctively, making it effective for driving sled dogs, livestock and teams of harnessed animals like oxen and mules. The sound is loud enough to affect multiple animals at once, making whip-cracking more efficient under some circumstances. This technique can be used as part of an escalation response, with sound being used first prior to a pain stimulus being applied, again as part of operant conditioning.\n", "Donkey punch is the sexual practice of inflicting blunt force trauma to the back of the head or lower back of the receiving partner during anal or vaginal sex as an attempt by the penetrating partner to induce involuntary tightening of internal or external anal sphincter muscles or vaginal passage of the receiving partner. According to Dr. Jeffrey Bahr of Medical College of Wisconsin, there is no reflex in humans that would cause such tensing in response to a blow on the head, although striking a partner on the back of the neck or head could cause severe, even lethal injury.\n", "The whips are designed to be flexible and not to inflict any serious damage onto their victims, but do produce a loud noise for the edification of onlookers. Participants claim one has not fully participated until one has been whipped. Once they are on the property, the revelers play a variety of pranks on the farmers and beg for food for the communal gumbo that lies at the end of the route. A prize ingredient is a live chicken, which is usually thrown into the air for the drunken \"Mardi Gras\" to chase through the muddy yards and fields.\n", "The person was first whipped, or beaten, with \"virgis sanguinis\" (\"blood-colored rods\", probably), and his head was clad/covered in a bag made of a wolf's hide. On his feet were placed clogs, or wooden shoes, and he was then put into the \"poena cullei\", a sack made of ox-leather. Placed along with him into the sack was also an assortment of live animals, arguably the most famous combination being that of a serpent, a cock, a monkey and a dog. The sack was put on a cart, and the cart driven by black oxen to a running stream or to the sea. Then, the sack with its inhabitants was thrown into the water.\n" ]
how are doctors incentivized to be better and compete for careers in the toughest specialties within healthcare systems that are socialized?
Countries with public healthcare still have private practices which you can pay money to see. There's a basic service provided by the government, but nobody is stopping patients from purchasing more extensive coverage on top of it. You also have to keep in mind that hospitals are still competing with each other, so they will pay more to have good doctors. Yes, everyone's healthcare is subsidized, but a hospital with better doctors will have more patients and thus make more money.
[ "A survey published in 2009 found that PEM physicians report higher career satisfaction than doctors in all other specialties. Per doximity, pediatric emergency physicians in the U.S. make an average of $273,683 yearly. They also work fewer hours than do other subspecialists.\n", "Pre-Health Sciences are the undergraduate courses that prepare American college students for admission in medical, dentistry, pharmacy, optometry, veterinary, and physical therapy schools, and for training as a physician assistant. In the United States, colleges have moved away from the impractical designation of students as \"Pre-med\" majors, as only a small percentage of applicants actually achieve admission into medical schools. As such, students are given the choice to focus on the coursework required for admission.\n", "Although programs like medicaid exists to support minorities, there still seems to be a large number of people who are not insured. This financial drawback discourages people in the group to go to hospitals and doctors offices.\n", "BULLET::::- Other non-physicians have prescription privileges, such as pharmacists, optometrists, nurse practitioners, and physician assistants. Some advocates have asserted that the latter three professions receive less training in clinical pharmacology, therapeutics, and psychopharmacology than many clinical psychologists.\n", "According to the 2009 National Healthcare Disparities Report, uninsured Americans are less likely to receive preventive services in health care. For example, minorities are not regularly screened for colon cancer and the death rate for colon cancer has increased among African Americans and Hispanic populations. Furthermore, limited English proficient patients are also less likely to receive preventive health services such as mammograms. Studies have shown that use of professional interpreters have significantly reduced disparities in the rates of fecal occult testing, flu immunizations and pap smears. In the UK, Public Health England, a universal service free at the point of use, which forms part of the NHS, offers regular screening to any member of the population considered to be in an at-risk group (such as individuals over 45) for major disease (such as colon cancer, or diabetic-retinopathy).\n", "The Medical Schools Council is involved in aiding medical schools improve access for applicants with a broader range of backgrounds. In the late nineties, the Medical Schools Council (then CHMS) looked at admission data and concluded that men and people from ethnic minorities were suffering from discrimination when they applied to medical schools. It was noted that the gender variation may \"reflect the fact that girls are doing better academically than boys in school.\"\n", "Exceptions may be diseases that are so common that primary care physicians develop their own expertise. A study of patients with acute low back pain found the primary care physicians provided equivalent quality of care but at lower costs than orthopedic specialists.\n" ]
How much of ancient history are we missing?
Well, "history" is the study of text, but generally that means that it only goes back as far as there has been written word (and myths and oral histories etc). In Western Eurasia, this goes back to the Sumerians in about the fourth millennium, although one could argue that you still can't really do "history" for some time afterwards. However, we can extend our knowledge of past societies far back before that with archaeology, the study of past material remains. Archaeology can tell us a great deal about the societies it studies, such as economies, political structures, and religions. Now, to answer your question, the period you are curious about is called the "Neolithic" which is a word essentially meaning "new stone age" and is a period of time after the development of agriculture and before the use of metal. [Çatalhöyük](_URL_0_) is southern Turkey is probably the most famous Neolithic site in the "Fertile Crescent", but an important thing to remember is that there is no "one thing" happening at this time. You are asking about the entire surface of the earth, a whole bunch of things were happening, and the spread of agriculture around the Black Sea had about as much to do with what as going on in Florida as the Lapita settlement of Tonga had to do with Homer. As a side note, please disregard the Ancient Aliens nonsense in the other response.
[ "BULLET::::- Indraprastha, the legendary Ancient City is believed to have been established 5000 years ago (c. 2800 BC), as per the ancient Indian text- the Mahabharata. Though very much a part of India's very Ancient history, it lacks any tangible evidence to say without doubt that it existed. Archaeological evidence exists, but in such scarcity as to be inconclusive. As acknowledged by British historian Michael Wood in his BBC documentary The Story of India, the excavated ceramic pottery from the site of today's Purana Qila in Delhi and the excavated layers of the ancient city seem to match what the verses of the Mahabharata indicate. More possible evidence in its favour is the existence of a village named Indraprastha very close to the Purana Qila that was destroyed by the British during the construction of Lutyens' Delhi.\n", "Some narrative history has survived for most of the Hellenistic world, at least of the kings and the wars; this is lacking for India. The main Greco-Roman source on the Indo-Greeks is Justin, who wrote an anthology drawn from the Roman historian Pompeius Trogus, who in turn wrote, from Greek sources, at the time of Augustus Caesar. Justin tells the parts of Trogus' history he finds particularly interesting at some length; he connects them by short and simplified summaries of the rest of the material. In the process he has left 85% to 90% of Trogus out; and his summaries are held together by phrases like \"meanwhile\" (\"eodem tempore\") and \"thereafter\" (\"deinde\"), which he uses very loosely. Where Justin covers periods for which there are other and better sources, he has occasionally made provable mistakes. As Tarn and Develin both point out, Justin is not trying to write history in our sense of the word; he is collecting instructive moral anecdotes. Justin does find the customs and growth of the Parthians, which were covered in Trogus' 41st book, quite interesting, and discusses them at length; in the process, he mentions four of the kings of Bactria and one Greek king of India, getting the names of two of them wrong.\n", "Like the even more famous lost history of Alexander by Ptolemy I of Egypt, no significant amount of his work survived the end of the ancient world (fragments in C. W. Müller, \"Frag. hist. Graec.\" ii. 450–461).\n", "Although the end date of ancient history is disputed, some Western scholars use the fall of the Western Roman Empire in 476 AD (the most used), the closure of the Platonic Academy in 529 AD, the death of the emperor Justinian I in 565 AD, the birth of Islam in 610 CE or the rise of Charlemagne as the end of ancient and Classical European history. This list does not contain entries that originated after ancient history.\n", "Other sources for the period are the traditions recorded by later Greek writers such as Herodotus. However, these traditions are not part of any form of history as we would recognise it today; those transmitted by Herodotus he recorded whether or not he believed them to be accurate. Indeed, Herodotus does not even record any dates before 480 BC.\n", "The book \"History of the Ancient World\" provides information on the history of the ancient states in Mesopotamia, Egypt, India, and China. It also includes the history of ancient Greece and Rome up to the fall of the Western Roman Empire in the 5th century AD. Its several chapters deal with religious views, art, and culture of the peoples of the ancient world.\n", "Most of what is known of the ancient world comes from the accounts of antiquity's own historians. Although it is important to take into account the bias of each ancient author, their accounts are the basis for our understanding of the ancient past. Some of the more notable ancient writers include Herodotus, Thucydides, Arrian, Plutarch, Polybius, Sima Qian, Sallust, Livy, Josephus, Suetonius, and Tacitus.\n" ]
how in boxing a person can get cut when punched by someone wearing gloves?
Friction. Even with gloves on, often times glancing blows still carry enough force to cause enough glove-to-skin friction to split the skin open. This is why you see boxers and fighters put Vaseline on their cheeks and eyebrows.
[ "Hand and wrist wraps are used to compress (and keep compressed when hitting) the bones and tissues in the hand. The claim is that such compression allows boxers to hit with greater force than if they did not use them. Boxers claim they feel less pain when hitting so their opponent may feel more pain. \n", "In general, boxers are prohibited from hitting below the belt, holding, tripping, pushing, biting, or spitting. The boxer's shorts are raised so the opponent is not allowed to hit to the groin area with intent to cause pain or injury. Failure to abide by the former may result in a foul. They also are prohibited from kicking, head-butting, or hitting with any part of the arm other than the knuckles of a closed fist (including hitting with the elbow, shoulder or forearm, as well as with open gloves, the wrist, the inside, back or side of the hand). They are prohibited as well from hitting the back, back of the head or neck (called a \"rabbit-punch\") or the kidneys. They are prohibited from holding the ropes for support when punching, holding an opponent while punching, or ducking below the belt of their opponent (dropping below the waist of your opponent, no matter the distance between).\n", "Boxing techniques utilize very forceful strikes with the hand. There are many bones in the hand, and striking surfaces without proper technique can cause serious hand injuries. Today, most trainers do not allow boxers to train and spar without hand/wrist wraps and gloves. Handwraps are used to secure the bones in the hand, and the gloves are used to protect the hands from blunt injury, allowing boxers to throw punches with more force than if they did not utilize them.\n", "The impact of gloves on the injuries caused during a fight is a controversial issue. Hitting to the head was less common in the bare-knuckle era because of the risk of hurting the boxer's hand. Gloves reduce the number of cuts caused, but British Medical Association research has stated that gloves do not reduce brain injuries and may even increase them, because the main cause of injury is acceleration and deceleration of the head, and fighters wearing gloves are able to punch harder to the head. Gloves may reduce the amount of eye injuries, especially if they are thumbless, but retinal tears and detached retinas still occur to boxers wearing modern gloves.\n", "Boxers and other combat athletes routinely use hand wraps and boxing gloves to help stabilize the hand, greatly reducing pain and risk of injury during impact. Proper punching form is the most important factor to prevent this type of fracture.\n", "Improper formation of the fist whilst punching or striking an object can cause bruising and broken small bones in the hand known as \"Boxer's fracture.\" Boxer's Fracture occurs when metacarpals or small bones in the hand break on the side of the pinky and ring finger. The name derives from the fact that such injuries are most common in boxers and practitioners of other fighting arts.\n", "BULLET::::2. There are no closed-fist punches to the face allowed in a Pure match, only open-handed slaps or chops to the face are allowed. Punches to other parts of the body (save for low blows) are permitted. The first use of a closed fist would get a warning, and the second would cause the wrestler to be penalized a rope break. If he is already out of rope breaks, he would be disqualified.\n" ]
why are some people coordinated and some people not? what in your brain determines how coordinated you are?
***Hand-eye coordination*** is quite complex, involving *several regions of your brain* dedicated to processing visual information, motor control, proprioception, eye movement, et cetera. Generally speaking and without getting into details of human neuroanatomy, this kind of **coordination requires your** ***brain*** **and your** ***body*** **to communicate well with each other**, so they both have to work well. Your ***genetics*** influence your *potential* to be faster, stronger, smarter than others, so that's a start, and there is a *relationship between motor skills and intelligence* (intelligence isn't actually one single component, but entails many qualities, such as visuo-spatial intelligence). But genetics isn't everything. Humans are born to learn language, but if we trap a human in a dungeon forever, he won't learn anything. ***Coordination*** is related with how efficient your *neuronal wiring* is and *how fast your neurons fire*. The human brain is ***plastic***, which means it can *reorganize itself* to a certain extent (more so when you're young rather when you're older), for example to heal itself, to remove useless cerebral connections to become more effective or to reorganize regions to become more specialized in something (ex. learning a language - which is why it's easier to learn a language while a child). *Like a muscle, you can train it:* typing is an easy example, you're learning a complex sequence of rapid finger movements and with daily practice you learn to be very quick and efficient. While you're practicing, you're stimulating the brain into changing its cortical excitability (how easy it is to make neurons fire) and reorganizing itself, reflecting you learning how to type and making you better at doing that. ***Summing it up***, some people are born with a better body and a brain that is more efficient at processing and coordinating its information and transmitting everything to the body and backwards, but depending on your physical activity, you're not only making your body stronger/faster but you're also stimulating your brain into getting specialized at "throwing punches" (therein the importance of repeating the same punch several times while learning martial arts).
[ "Coordination refers to the extent of necessity in explicit revealed planning and coordinating efforts during teamwork. When a group possesses a strong transactive memory system, the need for explicit coordination efforts reduces since teammates are aware of other teammates strengths and weaknesses, can anticipate their behavior and responds, and make quick adjustments of their own behavior in return. In groups that have developed a transactive memory, members are able to easily coordinate with one another and can go directly to those with expertise if they need their information.\n", "Coordination refers to \"the degree to which persons perceive that their actions have fitted together into some mutually intelligible sequence or pattern of actions\". It exists \"when two people attempt to make sense out of the sequencing of messages in their conversation\". That is, if people in the interaction can recognize what their partners are talking about, then we say the conversation comes to a coordination. Scientists believes that people's desire for coordination in interaction arises from the subjectivity of meaning, which means the same message may have different meanings to different people. In order to avoid this pitfall in communication, people work together to share meanings. Research shows that sense making is the foundation of coordination. By tokens within the information connected by means of channel can the logic relationship emerge, then it contributes to the sense making. Sense making helps people to establish common understanding then further develops coordination between people.\n", "Motor coordination is the combination of body movements created with the kinematic (such as spatial direction) and kinetic (force) parameters that result in intended actions. Motor coordination is achieved when subsequent parts of the same movement, or the movements of several limbs or body parts are combined in a manner that is well timed, smooth, and efficient with respect to the intended goal. This involves the integration of proprioceptive information detailing the position and movement of the musculoskeletal system with the neural processes in the brain and spinal cord which control, plan, and relay motor commands. The cerebellum plays a critical role in this neural control of movement and damage to this part of the brain or its connecting structures and pathways results in impairment of coordination, known as ataxia.\n", "Language coordination is the tendency of people to mimic the language of others. The coordination occurs when one person responds to another using similar vocabulary, or word or sentence structure. Language coordination can also be applied to individuals who linguistically coordinate to a group. As suggested by the communication accommodation theory, this is often used as a way to reduce social distance (convergence). Language coordination often occurs unconsciously.\n", "Tasks completion generally requires the coordination of others. Coordinated human interaction takes on the role of combining the integration of time, energy, effort, ability, and resources of multiple individuals to meet a common goal. Coordination can also be thought of as the critical mechanism that links or ties together the efforts on the singular level to that of the larger task being completed by multiple members. Coordination allows for the successful completion of the otherwise larger tasks that one might encounter. \n", "The concept of coordination has to do with the fact that our actions do not stand alone with regard to communication. The words or actions that we use during a conversation come together to produce patterns. These patterns, also known as stories lived, influence the behavior used during each interaction as a way to collaborate. Pearce and Cronen are quick to point out that coordination does not imply a commitment to coordinate \"smoothly\", but rather the concept is meant to provide the basis for being mindful of the other side of the story.\n", "Examples of motor coordination are the ease with which people can stand up, pour water into a glass, walk, and reach for a pen. These are created reliably, proficiently and repeatedly, but these movements rarely are reproduced exactly in their motor details, such as joint angles when pointing or standing up from sitting.\n" ]
how is america not totally collapsing because of debt and the dollar bill losing value?
The US is in *such* a better financial position than it was just 7-8 years ago. No one's talking about the banks and financial system collapsing this time. Almost all countries have debt. Debt isn't a problem unless other countries stop believing you can pay it back eventually. The dollar is neither particularly strong nor particularly weak right now, compared to long-term historical values.
[ "The U.S. government continued to run large deficits post-crisis, with the national debt rising from $10.0 trillion as of September 2008 to $16.1 trillion by September 2012. The debt increases were $1.89 trillion in fiscal year 2009, $1.65 trillion in 2010, $1.23 trillion in 2011, and $1.26 trillion in 2012.\n", "Yalman Onaran of Bloomberg News wrote that the government's failure to raise the debt ceiling and pay its debt would \"halt a $5 trillion lending mechanism for investors who rely on Treasuries, blow up borrowing costs for billions of people and companies, ravage the dollar and throw the U.S. and world economies into a recession that probably would become a depression\", noting that a government default would be 23 times larger than the Lehman Brothers bankruptcy during the Great Recession. On October 15, 2013, Fitch, the credit rating agency, placed the U.S. AAA ratings on \"rating watch negative\" as talks to increase the debt limit reached an impasse fueling concerns of congressional dysfunction and impending default.\n", "In addition to the trade deficit, the U.S. dollar's decline was linked to a variety of other factors, including a major spike in oil prices. Economists such as Alan Greenspan suggested that another reason for the decline of the dollar was its decreasing role as a major reserve currency. Chinese officials signaled plans to diversify the nation's $1.9 trillion reserve in response to a falling U.S. currency which also set the dollar under pressure.\n", "Since U.S. saving rates were very low (roughly one-third of Japan's,) the deficit was mostly covered by borrowing from abroad, turning the United States within a few years from the world's greatest creditor nation to the world's greatest debtor. Not only was this damaging to America's status, it was also a profound shift in the postwar international financial system, which had relied on the export of U.S. capital. In addition, the media and entertainment industry during the 1980s glamorized the stock market and financial sector (e.g. the 1987 movie Wall Street), causing many young people to pursue careers as brokers, investors, or bankers instead of manufacturing and making it unlikely that any of the lost industrial base would be restored any time soon.\n", "Between June 2007 and November 2008, Americans lost a total of $8.3 trillion in wealth between housing and stock market losses, contributing to a decline in consumer spending and business investment. The crisis has caused unemployment to rise and GDP to decline at a significant annual rate during Q4 2008.\n", "Paul Krugman wrote in December 2010: \"The root of our current troubles lies in the debt American families ran up during the Bush-era housing bubble. Twenty years ago, the average American household’s debt was 83 percent of its income; by a decade ago, that had crept up to 92 percent; but by late 2007, debts were 130 percent of income. All this borrowing took place both because banks had abandoned any notion of sound lending and because everyone assumed that house prices would never fall. And then the bubble burst. What we’ve been dealing with ever since is a painful process of 'deleveraging': highly indebted Americans not only can't spend the way they used to, they're having to pay down the debts they ran up in the bubble years. This would be fine if someone else were taking up the slack. But what's actually happening is that some people are spending much less while nobody is spending more—and this translates into a depressed economy and high unemployment. What the government should be doing in this situation is spending more while the private sector is spending less, supporting employment while those debts are paid down. And this government spending needs to be sustained: we're not talking about a brief burst of aid; we’re talking about spending that lasts long enough for households to get their debts back under control. The original Obama stimulus wasn’t just too small; it was also much too short-lived, with much of the positive effect already gone.\"\n", "In April 1979, however, the United States may have technically defaulted on $122 million in Treasury bills, which was less than 1% of U.S. debt. The Treasury Department characterized it as a delay rather than as a default, but it did have consequences for short-term interest rates, which jumped 0.6%. Others view it as a temporary, partial default.\n" ]
At the time, did people think there would be a WW2?
Marshal Ferdinand Foch, the man who accepted the german armistice famously stated in 1919, ["This is not a peace. It is an armistice for twenty years".](_URL_0_) He was correct, WWII began 20 years and 64 days later. He was not the only one who shared that sentiment. Winston Churchill avidly spoke about rearmament during the 1930s, but for the most part the general public did not.
[ "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", "The world lived in the constant fear of World War III in the Cold War. Seemingly any conflict involving Communism might lead to a conflict between the Warsaw pact countries and the NATO countries. The prospect of a third world war was made even more frightening by the fact that it would almost certainly be a nuclear war. In 1949 the Soviets developed their first atomic bomb, and soon both the United States and Soviet Union had enough to destroy the world several times over. With the development of missile technology, the stakes were raised as either country could launch weapons from great distances across the globe to their targets. Eventually, Britain, France, and China would also develop nuclear weapons. It is believed that Israel developed nuclear weapons as well.\n", "Originally, the First World War was a complete wake-up call for the human race, leading to greater internationalism and a \"Never Again\" spirit towards war that would eventually wear away the differences between the various power-blocs. By the 2020s, a global League of Nations oversees a planet totally at peace. The fledgling Nazi Party, in this 'original' timeline, simply faded out after the 1923 Beer Hall Putsch.\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", "World War II was the most devastating conflict in history with much of Europe and Asia left in ruins at war's end. Yet, there was no peace. The superpowers of the United States and Soviet Union and their ideologies of democracy versus tyranny competed for prominence on the world stage in a cold war. For over 40 years these nuclear superpowers maintained a standoff and avoided a hot war that could have potentially destroyed the planet. America and the Cold War explored this powerful subject through such iconic artifacts as: an original 34' Nike Ajax missile, arming plug used to activate the bomb used on Hiroshima, Thunderbolt Air Raid siren, SALT I Treaty, scale model of Apollo-Soyuz, candy parachute from the Berlin Airlift, Stasi surveillance equipment, and a desk plaque awarded to the crew members of the Soviet SA-2 missile battalion that shot down Francis Gary Powers U-2 spy plane in 1960.\n", "World War II from 1939 to 1945 saw a human and economic catastrophe which hit Europe hardest. It demonstrated the horrors of war, and also of extremism, through the Holocaust and the atomic bombings of Hiroshima and Nagasaki. Once again, there was a desire to ensure it could never happen again, particularly with the war giving the world nuclear weapons. Most European countries failed to maintain their Great Power status, with the exception of the USSR, which became a superpower after World War II and maintained the status for 45 years. This left two rival ideologically opposed superpowers.\n" ]
how does the government keep increasing the debt ceiling? are they simply pushing the debt onto the future generation?
The debt ceiling is an artificial limit on debt. It has no effect on actual interest rates or the borrowing power of the US. It is simply a red tape tool used to cause debate about spending every few months. Because it was created by congress, they can also raise it. This is like you saying, I'm only going to eat 6 more times. After that 6th meal, you can then tell yourself that you'll raise the total amount of meals by 3 to a total of 9. You will do this every day, adding 3 more meals to the total amount of meals you will ever allow yourself to eat. The US gains debt whenever it spends more than it collects. (taxes, funds, tariffs) The US also gains debt whenever someone buys a US backed bond. These bonds are an investment in the US and accrue interest. The money gained from these bonds pays for whatever our taxes don't. Each year we pay the interest on these bonds. Whenever someone says the US owes debt to China or to Social Security, it really means that those groups own bonds. The only thing they can do is essentially collect the interest off the bonds or sell the bonds. Currently US Bonds are the safest and most secure investment since US is very unlikely to default anytime soon. Because the interest rate on the bonds is so low, it actually makes great financial sense to grow our debt by investing more into the US. So long as the money spent grows the economy at a rate higher than the interest rate on our debt, the US profits. If we were ever to pay off our debt, it would be a later generation, but paying it off any time soon would actually hurt us and make it even harder for future generations.
[ "A vote to increase the debt ceiling has usually been (since the 1950s) a legal budgetary formality between the President and Congress. The debt ceiling has not historically been a political issue that would make the elected government fail to pass a yearly budget. Reports to Congress (from the OMB and other sources) in the 1990s have repeatedly stated that the debt limit is an ineffective means to restrain the growth of debt.\n", "In a press conference held on January 14, 2013, President Obama stated that not raising the debt ceiling would cause delays in payments including benefits and government employees' salaries and lead to default on government debt. President Obama urged Congress to raise the debt ceiling without conditions to avoid a default by the United States on government debt. Raising the debt ceiling was also supported by Ben Bernanke, chairman of the Federal Reserve.\n", "The process of setting the debt ceiling is separate and distinct from the regular process of financing government operations, and raising the debt ceiling does not have any direct impact on the budget deficit. The US government passes a federal budget every year. This budget details projected tax collections and outlays and, therefore, the amount of borrowing the government would have to do in that fiscal year. A vote to increase the debt ceiling is, therefore, usually seen as a formality, needed to continue spending that has already been approved previously by the Congress and the President. The Government Accountability Office explains: \"The debt limit does not control or limit the ability of the federal government to run deficits or incur obligations. Rather, it is a limit on the ability to pay obligations already incurred.\" The apparent redundancy of the debt ceiling has led to suggestions that it should be abolished altogether.\n", "Underlying the contentious debate over raising the debt ceiling has been an anxiety, growing since 2008, about the large United States federal budget deficits and the increasing federal debt. According to the Congressional Budget Office (CBO): \"At the end of 2008, that debt equaled 40 percent of the nation's annual economic output (a little above the 40-year average of 37 percent). Since then, the figure has shot upward: By the end of fiscal year 2011, the Congressional Budget Office (CBO) projects federal debt will reach roughly 70 percent of gross domestic product (GDP) — the highest percentage since shortly after World War II.\" The sharp rise in debt after 2008 stems largely from lower tax revenues and higher federal spending related to the severe recession and persistently high unemployment in 2008–11. Though a balanced budget is ideal, allowing down payment on debt and more flexibility within government budgeting, limiting deficits to within 1% to 2% of GDP is sufficient to stabilize the debt. Deficits in 2009 and 2010 were 10.0 percent and 8.9 percent respectively, and the largest as a share of gross domestic product since 1945.\n", "The 1995 request for a debt ceiling increase led to debate in Congress on reduction of the size of the federal government, which led to the non-passage of the federal budget, and the United States federal government shutdown of 1995–96. The ceiling was eventually increased and the government shutdown resolved.\n", "Since the United States Department of the Treasury has no authority to issue or incur debt beyond the debt ceiling set by the United States Congress, failure to reach an agreement between the necessary members of the government to raise the debt ceiling meant that certain debts would not be paid, and this would potentially affect the government's ability to borrow quickly or at low cost, due to a perception of increased risk in loaning money to the US government. If the debt ceiling were not raised by August 2, 2011, either government spending would have to be decreased, or debt would have to be paid later than promised, also known as a default.\n", "The history of United States debt ceiling deals with movements in the United States debt ceiling since it was created in 1917. Management of the United States public debt is an important part of the macroeconomics of the United States economy and finance system, and the debt ceiling is a limitation on the federal government's ability to manage the economy and finance system. The debt ceiling is also a limitation on the federal government's ability to finance government operations, and the failure of Congress to authorise an increase in the debt ceiling has resulted in crises, especially in recent years. The debt ceiling has been suspended since October 30, 2015.\n" ]
Why must an electric charge be moving to experience a force inside a magnetic field?
> But what if the external electron is stationary? In that case, wouldn't the electrons inside the conductor undergo length contraction because they have a velocity relative to our external electron, resulting in a net negative charge? Shouldn't that also exert a force? A steady current in a wire implies that the wire has an overall neutral charge. What this thought experiment is trying to demonstrate is that for a neutral wire with a steady current, performing a coordinate transformation results in the wire no longer being electrically neutral leading to an electric force. Since both reference frame has to agree on the interaction between the wire and the test charge, the magnetic field manifests itself in the rest frame of the wire. That also implies that the external test charge has to be moving to experience this force, or there wouldn't be a charge imbalance from the rest frame of the test charge.
[ "Electrical charges interact via a field. That field is called electric field.If the charge doesn't move. If the charge moves, thus realizing an electric current, especially in an electrically neutral conductor, that field is called magnetic.\n", "A charged particle moving in a -field experiences a \"sideways\" force that is proportional to the strength of the magnetic field, the component of the velocity that is perpendicular to the magnetic field and the charge of the particle. This force is known as the \"Lorentz force\", and is given by\n", "Often the magnetic field is defined by the force it exerts on a moving charged particle. Experiments in electrostatics show that a particle of charge in an electric field experiences a force . Other experiments show that a charged particle experiences a force proportional to its relative velocity to a current-carrying wire. The velocity dependent portion can be separated such that the force on the particle satisfies the \"Lorentz force law\",\n", "An electric field generally varies in space, and its strength at any one point is defined as the force (per unit charge) that would be felt by a stationary, negligible charge if placed at that point. The conceptual charge, termed a 'test charge', must be vanishingly small to prevent its own electric field disturbing the main field and must also be stationary to prevent the effect of magnetic fields. As the electric field is defined in terms of force, and force is a vector, so it follows that an electric field is also a vector, having both magnitude and direction. Specifically, it is a vector field.\n", "Any charged particle in an electric field will feel a force proportional to the charge and field strength such that formula_1, where F is force, q is charge, and E is electric field strength. Similarly, any particle moving in a magnetic field will feel a force proportional to the velocity and charge of the particle. The force felt by any particle is then equal to formula_2, where F is force, q is the charge on the particle, v is the velocity of the particle, B is the strength of the magnetic field, and formula_3 is the cross product. In the case of a velocity selector, the magnetic field is always at 90 degrees to the velocity and the force is simplified to formula_4 in the direction described by the cross product.\n", "The same situations that create magnetic fields—charge moving in a current or in an atom, and intrinsic magnetic dipoles—are also the situations in which a magnetic field has an effect, creating a force. Following is the formula for moving charge; for the forces on an intrinsic dipole, see magnetic dipole.\n", "When a charge is placed in a location with a non-zero electric field, a force will act on it. The magnitude of this force is given by Coulomb's law. Thus, if that charge were to move, the electric field would be doing work on the electric charge. Thus we can speak of electric potential at a certain point in space, which is equal to the work done by an external agent in carrying a unit of positive charge from an arbitrarily chosen reference point to that point without any acceleration and is typically measured in volts.\n" ]
why jeremy corbyn is being described as a 'threat to national security'
If you say something is a threat to nation security or something similar you will automatically mobilize a huge segment of conservative votership against someone. It's nothing more than a cheap political move, but it will probably work.
[ "He also claims that insecure messaging puts national security at risk. He claims that since the White House staffers must bypass government servers, their email is traveling across the Internet without necessary security. He cites numerous national security risk scenarios that could occur due to possible interception of White House email messages.\n", "BULLET::::- Reject Secrecy: she believes that those \"on the left and right who believe that the American people have no greater enemy than their own government\", whom she implies believe in full transparency and no secrecy, are not able to answer how this protects the United States against terrorist attack and that \"opponents of the Patriot Act have never explained how they think the government can track down the web of Islamist activity in public\".\n", "He is an advocate of enhancing intelligence capabilities, modernizing military equipment and spending more money on preparing first-responders like firemen and emergency medical technicians for crises. He worries that future presidential administrations will spend less than they should on homeland security because to do so will require raising taxes or cutting non-defense programs. He also worries that the unpopularity of the Iraq war will cause the country to reduce its military presence overseas.\n", "On May 25, 2006, Boehner issued a statement defending his agenda and attacking his \"Democrat friends\" such as Minority Leader Nancy Pelosi. Boehner said regarding national security that voters \"have a choice between a Republican Party that understands the stakes and is dedicated to victory, and a Democrat Party with a non-existent national security policy that sheepishly dismisses the challenges of a post-9/11 world and is all too willing to concede defeat on the battlefield in Iraq.\"\n", "He forcefully defended his actions as \"crucial to our national security\" and claimed that the American people expected him to \"do everything in my power, under our laws and Constitution, to protect them and their civil liberties\" as long as there was a \"continuing threat\" from al Qaeda. The president also had harsh words for those who broke the story, saying that they acted illegally. \"The unauthorized disclosure of this effort damages our national security and puts our citizens at risk\", he said.\n", "Corbyn has said he would want with the US a \"strong and friendly relationship\", while \"not be[ing] afraid to speak our mind\". He has also said the country \"is the strongest military power on the planet by a very long way. It has a special responsibility to use its power with care and to support international efforts to resolve conflicts collectively and peacefully\". He has also said that US President, Donald Trump, \"seems determined to add to the dangers [in the global situation] by recklessly escalating the confrontation with North Korea, unilaterally launching missile strikes on Syria, opposing President Obama’s nuclear arms deal with Iran and backing a new nuclear arms race\". Following Trump's withdrawal of the US from the Paris Agreement, he said it was a \"very big shame\", further saying that \"Donald Trump's decision to pull the United States out of the Paris climate change deal is reckless and dangerous\".\n", "However, current Labour leader Jeremy Corbyn has been vocal on Middle East foreign policy. He is a member of the Palestine Solidarity Campaign, regularly campaigning against conflict in Gaza and what the organisation considers to be apartheid in Israel. Corbyn has also supported boycotting and sanctioning arms dealings in Israel, saying on the \"Electronic Intifada\": \"I think we have to push robustly for the limitation of arms supplies ... Israel is after all facing an investigation ... for war crimes, [at the International Criminal Court] as indeed are the Hamas forces on a much different or lesser scale.\"\n" ]
Do "non-water rainbows" exist and (if yes) what do they look like?
The main difference between different liquids boils down to their indices of refraction and their dispersion. Changes in the index of refraction would alter the size of the rainbow arc, while changes in their dispersion would change how wide the actual rainbow band is. If the dispersion is negative, it would also flip the order of the rainbow (Red would be on the inside, and violet would be on the outside).
[ "The rainbow, a natural phenomenon noted for its beauty and mystical appearance, has been a favorite component of mythology throughout history. Rainbows are part of the myths of many cultures around the world. The Norse saw it as Bifrost; Abrahamic traditions see it as a covenant with God not to destroy the world by means of floodwater. Whether as a bridge to the heavens, messenger, archer's bow, or serpent, the rainbow has been pressed into symbolic service for millennia. There is a myriad of beliefs concerning the rainbow. The complex diversity of rainbow myths are far-reaching, as are their inherent similarities.\n", "A rainbow is not located at a specific distance from the observer, but comes from an optical illusion caused by any water droplets viewed from a certain angle relative to a light source. Thus, a rainbow is not an object and cannot be physically approached. Indeed, it is impossible for an observer to see a rainbow from water droplets at any angle other than the customary one of 42 degrees from the direction opposite the light source. Even if an observer sees another observer who seems \"under\" or \"at the end of\" a rainbow, the second observer will see a different rainbow—farther off—at the same angle as seen by the first observer.\n", "A circular rainbow should not be confused with the glory, which is much smaller in diameter and is created by different optical processes. In the right circumstances, a glory and a (circular) rainbow or fog bow can occur together. Another atmospheric phenomenon that may be mistaken for a \"circular rainbow\" is the 22° halo, which is caused by ice crystals rather than liquid water droplets, and is located around the sun (or moon), not opposite it.\n", "A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.\n", "Rainbows occur frequently in mythology, and have been used in the arts. One of the earliest literary occurrences of a rainbow is in the Book of Genesis chapter 9, as part of the flood story of Noah, where it is a sign of God's covenant to never destroy all life on earth with a global flood again. In Norse mythology, the rainbow bridge Bifröst connects the world of men (Midgard) and the realm of the gods (Asgard). Cuchavira was the god of the rainbow for the Muisca in present-day Colombia and when the regular rains on the Bogotá savanna were over, the people thanked him offering gold, snails and small emeralds. The Irish leprechaun's secret hiding place for his pot of gold is usually said to be at the end of the rainbow. This place is appropriately impossible to reach, because the rainbow is an optical effect which cannot be approached.\n", "A rainbow does not exist at one particular location. Many rainbows exist; however, only one can be seen depending on the particular observer's viewpoint as droplets of light illuminated by the sun. All raindrops refract and reflect the sunlight in the same way, but only the light from some raindrops reaches the observer's eye. This light is what constitutes the rainbow for that observer. The whole system composed by the sun's rays, the observer's head, and the (spherical) water drops has an axial symmetry around the axis through the observer's head and parallel to the sun's rays. The rainbow is curved because the set of all the raindrops that have the right angle between the observer, the drop, and the sun, lie on a cone pointing at the sun with the observer at the tip. The base of the cone forms a circle at an angle of 40–42° to the line between the observer's head and their shadow but 50% or more of the circle is below the horizon, unless the observer is sufficiently far above the earth's surface to see it all, for example in an aeroplane (see above). Alternatively, an observer with the right vantage point may see the full circle in a fountain or waterfall spray.\n", "Supernumerary rainbows cannot be explained using classical geometric optics. The alternating faint bands are caused by interference between rays of light following slightly different paths with slightly varying lengths within the raindrops. Some rays are in phase, reinforcing each other through constructive interference, creating a bright band; others are out of phase by up to half a wavelength, cancelling each other out through destructive interference, and creating a gap. Given the different angles of refraction for rays of different colours, the patterns of interference are slightly different for rays of different colours, so each bright band is differentiated in colour, creating a miniature rainbow. Supernumerary rainbows are clearest when raindrops are small and of uniform size. The very existence of supernumerary rainbows was historically a first indication of the wave nature of light, and the first explanation was provided by Thomas Young in 1804.\n" ]
Would it be possible to use MagLev technology for faster/ cheaper Space Shuttle launches?
This is definitely possible; a more practical arrangement would be a straight track running through a tunnel angled through a mountain range pointed along your desired orbit. You probably wouldn't want to use magnetic levitation exactly either, rather a sled propelled through electromagnetic propulsion. There are a variety of interesting hurdles to overcome with such an arrangement. For example firing a projectile down the tunnel leaves a lot of air to move out of the way to allow passage. What do you do with it? It can't escape out the end fast enough so it would compress at the front of the projectile, stealing energy from the launch and perhaps damaging the payload. Engineering vents in miles of launch tunnel increases costs, and due to being underground probably won't exhaust to the surface. The benefits to such a launch system are interesting. While it would require similar energy as a rocket launch the energy can be obtained and spent in a different way. You could for example use electrical energy from hydroelectric generators rather than chemical rockets. You don't have to carry as much fuel along with the payload thus increasing the load or decreasing the vehicle size. Drawbacks might include throwing launch sleds into the plains beyond the mountain range, and your launch tunnel melting and requiring regular maintenance.
[ "NASA has been developing a launch aid using a magnetic levitation system to propel a spaceship. Proponents of maglev launch aid posit that it saves on design and launching costs, while providing a safer launching method.\n", "James R. Powell, former co-inventor of superconducting maglev in the 1960s, has since 2001 led investigation of a concept for using a maglev vactrain for space launch (theoretically two orders of magnitude less marginal cost than present rockets), where the StarTram proposal would have vehicles reach up to within an acceleration tunnel (lengthy to limit g-forces), considering boring through the ice sheet in Antarctica for lower anticipated expense than in rock.\n", "Several new technologies needed to be developed and tested to facilitate successful launch and recovery of both stages of the SpaceX reusable rocket launching system. Following the completion of the third high-altitude controlled-descent test, and the completion of the third low-altitude flight of the second-generation prototype test vehicle (plus eight flights of the first-generation Grasshopper prototype flight test vehicle), SpaceX indicated that they are now able to consistently \"reenter from space at hypersonic velocity, restart main engines twice, deploy landing legs and touch down at near zero velocity.\"\n", "StarTram is a proposal for a maglev space launch system. The initial Generation 1 facility would be cargo only, launching from a mountain peak at an altitude of with an evacuated tube staying at local surface level; it has been claimed that about 150,000 tons could be lifted to orbit annually. More advanced technology would be required for the Generation 2 system for passengers, with a longer track instead gradually curving up at its end to the thinner air at altitude, supported by magnetic levitation, reducing g-forces when each capsule transitions from the vacuum tube to the atmosphere. A SPESIF 2010 presentation stated that Gen-1 could be completed by the year 2020+ if funding began in 2010, Gen-2 by 2030+.\n", "Elon Musk said at the beginning of the program that he believed the return, vertical landing and recovery was possible because the SpaceX manufacturing methodologies result in a rocket efficiency exceeding the typical 3% margin. A SpaceX rocket operating in the reusable configuration has approximately 30% less payload lift capacity than the same rocket in an expendable configuration.\n", "The NASA Solar Technology Application Readiness (NSTAR) electrostatic ion thruster, developed at NASA Glenn, achieves a specific impulse of 1000–3000 seconds. This is an order of magnitude higher than traditional space propulsion methods, resulting in a mass savings of approximately half. This leads to much cheaper launch vehicles. Although the engine produces just thrust at maximal power (2,100 W on DS1), the craft achieved high speeds because ion engines thrust continuously for long periods.\n", "Separate technologies may be combined. In 2010, NASA suggested that a future scramjet aircraft might be accelerated to 300 m/s (a solution to the problem of ramjet engines not being startable at zero airflow velocity) by electromagnetic or other sled launch assist, in turn air-launching a second-stage rocket delivering a satellite to orbit.\n" ]
When a new language is discovered, how do people start deciphering it?
Ooh! I can answer this one. Sort of. I studied linguistics at university, and Field Methods is one of the major aspects. So, while I can't talk about the historical aspect, I can talk about the modern approach. I can't imagine there's much that has changed there aside from the rigor of the method (you'll see what I mean in a bit). The first step is to build a lexicon - a list of words. If the language is a living one, that's easy enough: the translator simply points at an object either in the abstract (on a map, for example) or in real life and tries to get the native speakers to name it, then records that name (this, of course, has been lampooned by Terry Pratchett when he talks about mountains that are named "Mountain", forests named "Lots of Trees", and even rivers named "Your Finger You Fool"). Once a substantial enough lexicon has been built, the idea is to start looking for patterns - phonetic (sounds), morphemic (units of meaning), lexical (higher units of meaning), and semantic (socially-contextualised units of meaning). From there, the patterns are tested. The translator will try to generate their own sentences with the information they have at hand. They *want* to get it wrong at this stage, because they will learn more in being corrected than in getting things correct. This process will go on and on, hopefully with multiple translators to correct for any confirmation bias or blind spots (some languages, for example, have a women's version and a men's version, so you'll need both genders translating to get both versions). Ideally, this process will go on for generations, because languages are, no kidding, *huge*. Hundreds of thousands of words, *millions* of permutations, *billions* of potential interpretations. And this doesn't take into account how some words simply do not gloss well. Look at r/DoesNotTranslate for some great examples. Problems, of course, arise with languages that no longer have any living speakers. We can't test the language, so we're left with huge gaping holes in our knowledge. Furthermore, no one's there to correct us if we go off track (by, say, misapplying a minor word, such as the difference between "educate" and "elucidate"). Historically, recorded language also tended toward the more formal, with graffiti being a major exception. We therefore miss out on a whole lot of colloquial stuff too.
[ "There are some linguists who question the very possibility of tracing language elements so far back into the past. Campbell notes that given the time elapsed since the origin of human language, every word from that time would have been replaced or changed beyond recognition in all languages today. Campbell harshly criticizes efforts to reconstruct a Proto-human language, saying \"the search for global etymologies is at best a hopeless waste of time, at worst an embarrassment to linguistics as a discipline, unfortunately confusing and misleading to those who might look to linguistics for understanding in this area.\" (Campbell and Poser 2008:393)\n", "Native-language identification (NLI) is the task of determining an author's native language (L1) based only on their writings in a second language (L2). NLI works through identifying language-usage patterns that are common to specific L1 groups and then applying this knowledge to predict the native language of previously unseen texts. This is motivated in part by applications in second-language acquisition, language teaching and forensic linguistics, amongst others.\n", "Traditional information extraction is a technology of natural language processing, which extracts information from typically natural language texts and structures these in a suitable manner. The kinds of information to be identified must be specified in a model before beginning the process, which is why the whole process of traditional Information Extraction is domain dependent. The IE is split in the following five subtasks.\n", "It is possible that the kinds of language experience and knowledge gained through the statistical learning of the first language influences one's acquisition of a second language. Some research points to the possibility that the difficulty of learning a second language may be derived from the structural patterns and language cues that one has already picked up from his or her acquisition of first language. In that sense, the knowledge of and skills to process the first language from statistical acquisition may act as a complicating factor when one tries to learn a new language with different sentence structures, grammatical rules, and speech patterns.\n", "Acquisition of language is a natural, intuitive, and subconscious process of which individuals need not be aware. One is unaware of the process as it is happening and, when the new knowledge is acquired, the acquirer generally does not realize that he or she possesses any new knowledge. According to Krashen, both adults and children can subconsciously acquire language, and either written or oral language can be acquired. This process is similar to the process that children undergo when learning their native language. Acquisition requires \"meaningful\" interaction in the target language, during which the acquirer is focused on meaning rather than form.\n", "By analyzing related languages with a technique known as the comparative method, linguists can make inferences about their shared parent language and its vocabulary. In this way, word roots have been found that can be traced all the way back to the origin of, for instance, the Indo-European language family.\n", "Reconstructions of the words and phenomes of ancient proto-languages such as Proto-Indo-European have been performed based on the observed analogues in present-day languages. Typically, these analyses are carried out manually using the \"comparative method\". First, words from different languages with a common etymology (cognates) are identified in the contemporary languages under study, analogous to the identification of orthologous biological sequences. Second, correspondences between individual sounds in the cognates are identified, a step similar to biological sequence alignment, although performed manually. Finally, likely ancestral sounds are hypothesised by manual inspection and various heuristics (such as the fact that most languages have both nasal and non-nasal vowels).\n" ]
- how do we perceive color?
if you are british you can watch this _URL_0_ its an episode of horizon that explores how people see colour. in recent research there's evidence that not everybody sees it the same way. for example in modern society we see primary and secondary colours as being very distinct. but a certain african tribe find it difficult to distinguish between certain colours. but that tribe sees the difference between certain shades of green more greatly than we do. because maybe it helps them distinguish ripe vegetables when gathering food. it's a good watch.
[ "Color vision is how we perceive the objective color, which people, animals and machines are able to distinguish objects based on the different wavelengths of light reflected, transmitted, or emitted by the object. In humans, light is detected by the eye using two types of photoreceptors, cones and rods, which send signals to the visual cortex, which in turn processes those colors into a subjective perception. Color constancy is a process that allows the brain to recognize a familiar object as being a consistent color regardless of the amount or wavelengths of light reflecting from it at a given moment.\n", "The question hinges on whether color is a product of the mind or an inherent property of objects. While most philosophers will agree that color assignment corresponds to spectra of light frequencies, it is not at all clear whether the particular psychological phenomena of color are imposed on these visual signals by the mind, or whether such qualia are somehow naturally associated with their noumena. Another way to look at this question is to assume two people (\"Fred\" and \"George\" for the sake of convenience) see colors differently. That is, when Fred sees the sky, his mind interprets this light signal as blue. He calls the sky \"blue.\" However, when George sees the sky, his mind assigns green to that light frequency. If Fred were able to step into George's mind, he would be amazed that George saw green skies. However, George has learned to associate the word \"blue\" with what his mind sees as green, and so he calls the sky \"blue\", because for him the color green has the name \"blue.\" The question is whether blue must be blue for all people, or whether the perception of that particular color is assigned by the mind.\n", "Color is the result of light reflecting back from an object to our eyes. The color that our eyes perceive is determined by the pigment of the object itself. Color theory and the color wheel are often referred to when studying colour combinations in visual design. Color is often deemed to be an important element of design as it is a universal language which presents the countless possibilities of visual communication.\n", "In fine art realism and scientific descriptions of color perception, local color is the color the brain perceives an object to be. This may be radically different from the actual wavelength of light received by the pupil. For example, an apple is painted to appear red in comparison to the colors around it, but the actual pigment mixture used may be a pale green. This effect, known as color constancy, can also be observed under colored lighting in reality, and in photographs with strong color tints such as The Dress.\n", "Perception of color depends heavily on the context in which the perceived object is presented. For example, a white page under blue, pink, or purple light will reflect mostly blue, pink, or purple light to the eye, respectively; the brain, however, compensates for the effect of lighting (based on the color shift of surrounding objects) and is more likely to interpret the page as white under all three conditions, a phenomenon known as color constancy.\n", "Color is usually attributed to external bodies. However, color is actually the activity of the eye's retina. It is a sensation. The external body is perceived as the cause of the sensation of color. We say, \"The body is red.\" In reality, though, color exists only in the retina of the eye. It is separate from the external object. Color is a mere sensation in the sense organ. The external object is perceived by the intellect's understanding as being the cause of sensations.\n", "As an analogy, consider the experience of color. People experience colors as discrete categories: blue, red, yellow, and so on, and these categories vary in different cultures. The physics of color, however, is actually continuous, with wavelengths measured in nanometers along a scale from ultraviolet to infrared. When a person experiences an object as \"blue\", she is (unconsciously) using her color concepts to categorize this wavelength. And in fact, people experience a whole range of wavelengths as \"blue.\"\n" ]
Is there a trade off that makes it hard for a virus to be both very contagious and very deadly?
Yeah, viruses that are overly virulent kill their hosts before they are able to transmit the virus to new hosts, so more deadly viral lineages tend to burn out before being widely transmitted. So there's an evolutionary trade off between high virulence and a strain's ability to maintain itself in a population.
[ "Dr. Anthony S. Fauci of the National Institutes of Health in Bethesda, Maryland, stated that as of now MERS-CoV \"does not spread in a sustained person to person way at all.\" Dr. Fauci stated that there is potential danger in that it is possible for the virus to mutate into a strain that does transmit from person to person.\n", "Generally, if a virus kills its host too quickly, the host will not have a chance to come in contact with other hosts and transmit the virus before dying. However, in serial passage, when a virus was being transmitted from host to host regardless of its virulence, such as Subbaro’s experiment, the viruses that grow the fastest (and are therefore the most virulent) are selected for.\n", "This strain of virus is less virulent than its counterpart, needing blood contact to transmit, and usually taking a longer time to infect a person, although it can have sudden short bursts of activity, during which spikes of techno-organic matter form from the diseased body and the body's parts change their forms. Another difference with the Transmode Virus is that infection is very painful and can incapacitate a person.\n", "Because viruses use vital metabolic pathways within host cells to replicate, they are difficult to eliminate without using drugs that cause toxic effects to host cells in general. The most effective medical approaches to viral diseases are vaccinations to provide immunity to infection, and antiviral drugs that selectively interfere with viral replication.\n", "Viral vectors proved to be more successful in transfecting cells as their life cycles require them to transfer their own genes to the host cells with high efficiency. A virus infects the human by inserting its gene directly into his cells. This can be deadly, but the brilliant idea is to take advantage of this natural ability. The idea is to remove all the dangerous genes in the virus and inject the healthy human genes. So, viruses are inserting positive elements to the host cells while attacking them and they will be helpful rather than harmful.\n", "These viruses are not currently believed to cause disease in humans. Infection with these viruses tends to lead to lifelong viraemia and their possible association with disease remains under investigation. Higher than usual viral loads have been associated with severe idiopathic inflammatory myopathies, cancer and lupus.\n", "The use of agents that do not cause harm to humans but disrupt the economy have been discussed. A highly relevant pathogen in this context is the foot-and-mouth disease (FMD) virus, which is capable of causing widespread economic damage and public concern (as witnessed in the 2001 and 2007 FMD outbreaks in the UK), whilst having almost no capacity to infect humans.\n" ]
(tennis elbow) why does applying pressure to the mid-arm, such as using a compression sleeve, greatly reduce or eliminate pain from tennis elbow?
The compression bands are meant to be worn about an inch or two down from where the tendon attaches to the bone. This helps to take the pressure off the tendon and allow it to heal. Basically the bands make our body think that the tendon actually attaches at the band, rather than at the bone. This allows the tendon to heal because when you use the muscle, the inflamed area isn't being used. In response to the person talking about shin splints, the bands for shin splints don't work because a lot of times there is too much compression in the shin and that's what causes the shin splints. Also, shin splints are not usually located in the tendon, as much as the entire muscle. So there's really not a specific area to take the pressure off.
[ "Tennis elbow, also known as lateral epicondylitis, is a condition in which the outer part of the elbow becomes painful and tender. The pain may also extend into the back of the forearm and grip strength may be weak. Onset of symptoms is generally gradual. Golfer's elbow is a similar condition that affects the inside of the elbow.\n", "One way to help treat minor cases of tennis elbow is to simply relax the affected arm. The rest lets stress and tightness within the forearm slowly relax and eventually have the arm in working condition—in a day or two, depending on the case.\n", "Symptoms associated with tennis elbow include, but are not limited to, radiating pain from the outside of the elbow to the forearm and wrist, pain during extension of wrist, weakness of the forearm, a painful grip while shaking hands or torquing a doorknob, and not being able to hold relatively heavy items in the hand. The pain is similar to the condition known as \"golfer's elbow\", but the latter occurs at the medial side of the elbow.\n", "Tennis elbow is a very common type of overuse injury. It can occur both from chronic repetitive motions of the hand and forearm, and from trauma to the same areas. These repetitions can injure the tendons that connect the extensor supinator muscles (which rotate and extend the forearm) to the olecranon process (also known as “the elbow”). Pain occurs, often radiating from the lateral forearm. Weakness, numbness, and stiffness are also very common, along with tenderness upon touch.\n", "Tennis elbow or lateral epicondylitis is a chronic or an acute inflammation of the tendons that arise from the outer part of the elbow. The affected tendons are the tendons of extensor muscles which originate from the lateral epicondyle of humerus. It is caused by the repetitive movements and overuse. It damages the tendons which results in pain and tenderness on the outer part of the elbow.\n", "Injuries to the Elbow are predominantly a result of poor techniques when both batting and bowling. Having a poor technique causes excess strain on the joint resulting in inflammation of the tendons surrounding the elbow. The inflammation can be treated through physiotherapy and rehabilitation to reduce the inflammation and strengthen the imbalance in the forearm.\n", "Early experiments suggested that tennis elbow was primarily caused by overexertion. However, studies show that trauma such as direct blows to the epicondyle, a sudden forceful pull, or forceful extension cause more than half of these injuries. Repeatedly mis-hitting a tennis ball in the early stages of learning the sport causes shock to the elbow joint and may contribute to contracting the condition.\n" ]
how is amd still in business?
> they seem to consistently post losses, in both revenue and market share. That's not enough information. Is that in only one market sector? AMD gave up on the PC market years ago, and that only makes up a small percent of their entire revenue stream. They make semi-conductors, and that's more than just processors, but also things like photo sensors, power converters, amplifiers, different types of diodes...
[ "By February 2015, roughly 40 percent of AMD's sales came from non-PC markets, such as video game consoles and embedded devices. When Su joined AMD in 2012, about 10 percent of sales came from non-PC products. In May 2015, Su and other AMD executives presented a long-term strategy for the company to focus on developing high-performance computing and graphics technologies for three growth areas: gaming, datacenter, and \"immersive platforms\" markets.\n", "AMD developed its first generation virtualization extensions under the code name \"Pacifica\", and initially published them as AMD Secure Virtual Machine (SVM), but later marketed them under the trademark \"AMD Virtualization\", abbreviated \"AMD-V\".\n", "In September 1969, AMD moved from its temporary location in Santa Clara to Sunnyvale, California. To immediately secure a customer base, AMD initially became a second source supplier of microchips designed by Fairchild and National Semiconductor. AMD first focused on producing logic chips. The company guaranteed quality control to United States Military Standard, an advantage in the early computer industry since unreliability in microchips was a distinct problem that customers – including computer manufacturers, the telecommunications industry, and instrument manufacturers – wanted to avoid.\n", "On October 16, 2014, AMD announced a new restructuring plan along with its Q3 results. Effective July 1, 2014, AMD reorganized into two business groups: Computing and Graphics, which primarily includes desktop and notebook processors and chipsets, discrete GPUs, and professional graphics; and Enterprise, Embedded and Semi-Custom, which primarily includes server and embedded processors, dense servers, semi-custom SoC products (including solutions for gaming consoles), engineering services, and royalties. As part of this restructuring, AMD announced that 7% of its global workforce would be laid off by the end of 2014.\n", "AMS is a field marketing organization offering sales and marketing support to insurance marketing entities. From May 1999 to September 2003, AMS hired Gagnon, an at-will, independent contractor, to develop custom software to assist with its information technology needs. AMS was Gagnon’s largest client, accounting for $2 million of revenue and 98 percent of his business. From May 2000 through April 2001, AMS and Gagnon entered a Technical Services Agreement, but nothing about a license was mentioned.\n", "AMD Piledriver Family 15h is a microarchitecture developed by AMD as the second-generation successor to Bulldozer. It targets desktop, mobile and server markets. It is used for the AMD Accelerated Processing Unit (formerly Fusion), AMD FX, and the Opteron line of processors.\n", "The AMT has undergone several changes since 1969. The most significant of those, according to the Joint Committee on Taxation, occurred under the Reagan era Tax Equity and Fiscal Responsibility Act of 1982. The law changed the AMT from an add-on tax to its current form: a parallel tax system. The current structure of the AMT reflects changes that were made by the 1982 law. However, participation and revenues from the AMT temporarily plummeted after the 1986 changes. Congress made other notable, but less significant, changes to the law in 1978, 1982, and 1986.\n" ]
Can a planet have a core made of diamond?
Not a core, but a planet with a higher carbon/oxygen ratio than Earth might end up with a mantle composed of diamond and silica carbide. However, these materials are poorer insulators than the silicate-dominated mantle we have, so such a planet would cool fairly rapidly in its interior and lack surface tectonics and volcanic outgassing, which are vital to the stability of Earth's habitable climate.
[ "Such a planet would probably have an iron- or steel-rich core like the known terrestrial planets. Surrounding that would be molten silicon carbide and titanium carbide. Above that, a layer of carbon in the form of graphite, possibly with a kilometers-thick substratum of diamond if there is sufficient pressure. During volcanic eruptions, it is possible that diamonds from the interior could come up to the surface, resulting in mountains of diamonds and silicon carbides. The surface would contain frozen or liquid hydrocarbons (e.g. tar and methane) and carbon monoxide. A weather cycle is theoretically possible on carbon planets with an atmosphere, provided that the average surface temperature is below 77 °C.\n", "Although diamonds on Earth are rare, extraterrestrial diamonds (diamonds formed outside of Earth) are very common. Diamonds not much larger than molecules are abundant in meteorites and some of them formed in stars before the Solar System existed. High pressure experiments suggest large amounts of diamonds are formed from methane on the ice giant planets Uranus and Neptune, while some planets in other solar systems may be almost pure diamond. Diamonds are also found in stars and may have been the first mineral ever to have formed.\n", "All of the rocky inner planets, as well as the moon, have an iron-dominant core. Venus and Mars have an additional major element in the core. Venus’ core is believed to be iron-nickel, similarly to Earth. Mars, on the other hand, is believed to have an iron-sulfur core and is separated into an outer liquid layer around an inner solid core. As the orbital radius of a rocky planet increases, the size of the core relative to the total radius of the planet decreases. This is believed to be because differentiation of the core is directly related to a body's initial heat, so Mercury's core is relatively large and active. Venus and Mars, as well as the moon, do not have magnetic fields. This could be due to a lack of a convecting liquid layer interacting with a solid inner core, as Venus’ core is not layered. Although Mars does have a liquid and solid layer, they do not appear to be interacting in the same way that Earth's liquid and solid components interact to produce a dynamo.\n", "Because the companion to PSR J1719-1438 is planet-sized, made primarily of carbon (with an unknown amount of oxygen), and very dense, it may be similar to a large diamond. In the science press, the object has been called the \"Diamond Planet\".\n", "In 1981, Marvin Ross wrote a paper titled \"The ice layer in Uranus and Neptune—diamonds in the sky?\" in which he proposed that huge quantities of diamonds might be found in the interior of these planets. At Lawrence Livermore, he had analyzed data from shock-wave compression of methane (CH) and found that the extreme pressure separated the carbon atom from the hydrogen, freeing it to form diamond.\n", "Earth's core is believed to be mostly an alloy of iron and nickel. The density indicates that it also contains a significant amount of lighter elements. Elements such as hydrogen would be stable in the Earth's core, however the conditions at the formation of the core would not be suitable for its inclusion. Carbon is a very likely constituent of the core. Preferential partitioning of the carbon isotopeC into the metallic core, during its formation, may explain why there seems to be more C on the surface and mantle of the Earth compared to other solar system bodies (−5‰ compared to -20‰). The difference can also help to predict the value of the carbon proportion of the core.\n", "BULLET::::- Most diamonds are not formed from highly compressed coal. More than 99 percent of diamonds ever mined have formed in the conditions of extreme heat and pressure about below the earth's surface. Coal is formed from prehistoric plants buried much closer to the surface, and is unlikely to migrate below through common geological processes. Most diamonds that have been dated are older than the first land plants, and are therefore older than coal. It is possible that diamonds can form from coal in subduction zones and in meteoroid impacts, but diamonds formed in this way are rare and the carbon source is more likely carbonate rocks and organic carbon in sediments, rather than coal.\n" ]
Is it possible for a conductive room temperature gas to exist?
Generally no, gases don't have free electrons. If you ionized it, it would be a plasma (which does conduct), and if you're asking if there is cold plasma, [there is](_URL_0_) (they're in fluorescent lights).
[ "Below the operating temperature, the liquid is too cold and cannot vaporize into a gas. Above the operating temperature, all the liquid has turned to gas, and the environmental temperature is too high for any of the gas to condense. In other words, whether too high or too low, thermal conduction is still possible through the walls of the heat pipe, but at a greatly reduced rate of thermal transfer.\n", "In monatomic gases (like argon) at room temperature and constant volume, volumetric heat capacities are all very close to 0.5 kJ/K/m, which is the same as the theoretical value of 3/2 RT per kelvin per mole of gas molecules (where R is the gas constant and T is temperature). As noted, the much lower values for gas heat capacity in terms of volume as compared with solids (although more comparable per mole, see below) results mostly from the fact that gases under standard conditions consist of mostly empty space (about 99.9% of volume), which is not filled by the atomic volumes of the atoms in the gas. Since the molar volume of gases is very roughly 1000 times that of solids and liquids, this results in a factor of about 1000 loss in volumetric heat capacity for gases, as compared with liquids and solids. Monatomic gas heat capacities per atom (not per molecule) are decreased by a factor of 2 with regard to solids, due to loss of half of the potential degrees of freedom per atom for storing energy in a monatomic gas, as compared with regard to an ideal solid. There is some difference in the heat capacity of monatomic vs. polyatomic gasses, and also gas heat capacity is temperature-dependent in many ranges for polyatomic gases; these factors act to modestly (up to the discussed factor of 2) increase heat capacity per atom in polyatomic gases, as compared with monatomic gases. Volumetric heat capacities in polyatomic gases vary widely, however, since they are dependent largely on the number of atoms per molecule in the gas, which in turn determines the total number of atoms per volume in the gas.\n", "This definition proves useful in vacuum systems because under conditions of rarefied gas flow, the conductance of various structures is usually constant, and the overall conductance of a complex network of pipes, orifices and other conveyances can be found in direct analogy to a resistive electrical circuit.\n", "Most are gases at room temperature; have relatively low densities; are poor electrical and thermal conductors; have relatively high ionisation energies and electronegativities; form acidic oxides; and are found naturally in uncombined states in large amounts.\n", "In vacuum technology, the residence time of gases on the surfaces of a vacuum chamber can determine the pressure due to outgassing. If the chamber can be heated, the above equation shows that the gases can be \"baked out\"; but if not, then surfaces with a low residence time are needed to achieve ultra-high vacuums.\n", "Although it is not a particularly convenient device, the gas thermometer provides an essential theoretical basis by which all thermometers can be calibrated. As a practical matter, it is not possible to use a gas thermometer to measure absolute zero temperature since the gases tend to condense into a liquid long before the temperature reaches zero. It is possible, however, to extrapolate to absolute zero by using the ideal gas law, as shown in the figure.\n", "Thermal conduction property of any gas under standard conditions of pressure and temperature is a fixed quantity. This property of a known reference gas or known reference gas mixtures can, therefore, be used for certain sensory applications, such as the thermal conductivity analyzer.\n" ]
how does overall wealth actually increase?
When we convert raw materials into other resources, the value increases. Raw steel and rocks isn’t that useful, but build a building and you can house people/do commercial activities. Wood isn’t useful, but you can print knowledge on paper and books are more valuable than raw wood. This concept extends to ideas, not just physical materials. A new technology like self-driving cars increases the value of the economy. A new app that allows you to easily order food delivery also adds value. As Long as economic activity exists, humans are constantly transforming resources, and value will increase.
[ "Wealth concentration is the process by which, under certain conditions, newly created wealth concentrates in the possession of already-wealthy individuals or entities. Accordingly, those who already hold wealth have the means to invest in new sources of creating wealth or to otherwise leverage the accumulation of wealth, thus are the beneficiaries of the new wealth. Over time, wealth concentration can significantly contribute to the persistence of inequality within society. Thomas Piketty in his book \"Capital in the Twenty-First Century\" argues that the fundamental force for divergence is the usually greater return of capital (r) than economic growth (g), and that larger fortunes generate higher returns.\n", "A 2015 paper by researchers for the International Monetary Fund argues that there is no trickle-down effect as the rich get richer: [I]f the income share of the top 20 percent (the rich) increases, then GDP growth actually declines over the medium term, suggesting that the benefits do not trickle down. In contrast, an increase in the income share of the bottom 20 percent (the poor) is associated with higher GDP growth.\n", "In macroeconomic theory the 'wealth effect' may refer to the increase in aggregate consumption from an increase in national wealth. One feature of its effect on economic behavior is the wealth elasticity of demand, which is the percentage change in the amount of consumption goods demanded for each one-percent change in wealth.\n", "Since wealth does not change proportionately with income from individual to individual or from year to year, we should get the result that high income leads to a low average propensity to consume while looking at the data across persons or over short periods of time. However, generally over a long period of time, wealth and income increase together, which leads to a constant ratio \"\" and thus a constant average propensity to consume. To further analyse the implications of the life-cycle model, we start by considering the case of a \"stationary economy\" in which population and productivity are constant through time. Then, we relax these assumptions one by one.\n", "The wealth of households amounts to US$280 trillion (2017). According to the eighth edition of the Global Wealth Report, in the year to mid-2017, total global wealth rose at a rate of 6.4%, the fastest pace since 2012 and reached US$280 trillion, a gain of US$16.7 trillion. This reflected widespread gains in equity markets matched by similar rises in non-financial assets, which moved above the pre-crisis year 2007's level for the first time this year. Wealth growth also outpaced population growth, so that global mean wealth per adult grew by 4.9% and reached a new record high of US$56,540 per adult. Tim Harford has asserted that a small child has greater wealth than the 2 billion poorest people in the world combined, since a small child has no debt.\n", "Research indicates that wealth is related to many positive outcomes in life. Such outcomes include: improved health and mental health, greater longevity, lower rates of infant mortality, experience fewer stressful life events, and less frequently the victims of violent crimes However, research suggests that wealth has a smaller impact on SWB than people generally think, even though higher incomes do correlate substantially with life satisfaction reports.\n", "Wealth concentration is a process by which created wealth, under some conditions, can become concentrated by individuals or entities. Those who hold wealth have the means to invest in newly created sources and structures of wealth, or to otherwise leverage the accumulation of wealth, and are thus the beneficiaries of even greater wealth.\n" ]
Is our solar system falling through space?
> Are we "falling?" In the sense that orbiting celestial bodies are in an [inertial frame of reference](_URL_0_), and falling while on earth also places you in an inertial reference frame, then yes, stars and planets are "falling". But don't confuse that with there being some sort of universal "down" direction that everything's falling toward. Rather, orbiting bodies are essentially in a constant state of free-fall around the body that they're orbiting -- always falling, but with enough "sideways" velocity to continuously "miss".
[ "It is a common misconception that this collision will disrupt the orbits of the planets in the Solar System. Although it is true that the gravity of passing stars can detach planets into interstellar space, distances between stars are so great that the likelihood of the Milky Way–Andromeda collision causing such disruption to any individual star system is negligible. Although the Solar System as a whole could be affected by these events, the Sun and planets are not expected to be disturbed.\n", "These objects are \"leaving\" the Solar System because their velocity and direction are taking them away from the Sun, and at their distance from the Sun, its gravitational pull is not sufficient to pull these objects back or into orbit. They are not impervious to the gravitational pull of the Sun and are being slowed down, but they have enough velocity to coast into interstellar space, i.e. retaining sufficient escape velocity to leave the Solar System.\n", "During a routine hyperspace jump, an accident involving a small meteoroid striking into the machinery causes the ship to be trapped in a stasis until billions of years have passed. They emerge in the Solar System's far future, at which time the sun has become a greenish-white dwarf and Earth has lost its atmosphere and become a tidally locked world; i.e., it only presents \"one face\" to the sun. The ship's main computer has also been damaged, so its decision to have the captain replaced by one of the passengers to maximize survival causes disagreement. The damage to the ship prevents it traveling faster than light, and the passengers and crew debate using the ship's remaining sub-light engine to travel relativistically to a neighboring star to look for a more viable planet.\n", "The Solar System is stable in human terms, and far beyond, given that it is unlikely any of the planets will collide with each other or be ejected from the system in the next few billion years, and the Earth's orbit will be relatively stable.\n", "This is a list of all spacecraft landings on other planets and bodies in the Solar System, including soft landings and both intended and unintended hard impacts. The list includes orbiters that were intentionally crashed, but not orbiters which later crashed in an unplanned manner due to orbital decay.\n", "According to the idea, the solar system had its origin in a gigantic star into which a smaller, dead, waterlogged star fell. This impact caused a huge explosion that flung fragments of the smaller star out into interstellar space where the water condensed and froze into giant blocks of ice. A ring of such blocks formed, that we now call the Milky Way, as well as a number of solar systems among which was our own, but with many more planets than currently exist.\n", "On 29 April, Roscosmos officially announced that the spacecraft was out of control and its orbit would eventually decay to fall back into Earth's atmosphere, with multiple systems suffering from failure and the main engine's fuel lines depressurized. The spacecraft was expected to disintegrate in the Earth's atmosphere between May 7 and 11. On the same day, the United States' NORAD reported that 44 pieces of debris \"in the vicinity of the resupply vehicle and its upper stage rocket body\" were being tracked by space tracking systems. Currently, various Russian sources reported that the potential cause of the anomaly may be related to the upper stage rocket engine shutdown or with the separation of the Progress spacecraft from the upper stage. A representative of the United States Air Force claimed that debris in the area indicated a blast.\n" ]
why a bunch of people have birthdays the same day?
You expect to see lots of pairs (we'd need more precise data to determine whether your group of friends shows more than the expected number, however). Although this is counterintuitive at first glance, it's actually fairly obvious if you look at it the right way. The point is that although the chance of any two people sharing a birthday is quite low (1/365), there are so many pairs of people that this *could* happen to, that it becomes almost inevitable that it *will* happen to a fair number of pairs. eg with 200 people, there are 19,900 different pairs of people, so we'd expect a lot of matches. Indeed with only 23 people (so 253 possible pairs of people) there is already 50/50 chance you get at least one pair sharing a birthday.
[ "According to a public database of births, birthdays in the United States are quite evenly distributed for the most part, but there tend to be more births in September and October. This may be because there is a holiday season nine months before (the human gestation period is about nine months), or because the longest nights of the year also occur in the Northern Hemisphere nine months before. However, it appears the holidays have more of an effect on birth rates than the winter: New Zealand, a Southern Hemisphere country, has the same September and October peak with no corresponding peak in March and April. The least common birthdays tend to fall around public holidays, such as Christmas, New Years Day and fixed-date holidays such as July 4 in the US. This is probably due to hospitals and birthing centres not offering labor inductions and elective Caesarean sections on public holidays.\n", "In New Zealand, the most common birthday is September 29, and the least common birthday is December 25. The ten most common birthdays all fall within a thirteen-day period, between September 22 and October 4. The ten least common birthdays (other than February 29) are December 24–27, January 1–2, February 6, March 22, April 1 and April 25. This is based on all live births registered in New Zealand between 1980 and 2017.\n", "In Judaism, the perspective on birthday celebrations is disputed by various rabbis, although today it is accepted practice by most of the faithful. In the Hebrew Bible, the one single mention of a celebration being held in commemoration of someone's day of birth is for the Egyptian Pharaoh which is recorded in . Rabbi Moshe Feinstein always acknowledged birthdays. The Lubavitcher Rebbe encouraged people to celebrate their birthdays, by gathering friends, making positive resolutions, and through various religious observances. According to Rabbi Yissocher Frand, the anniversary of a person's birth is a special day for that person's prayers to be accepted.\n", "It may well seem surprising that a group of just 23 individuals is required to reach a probability of 50% that two individuals in the group have the same birthday: this result is perhaps made more plausible by considering that the comparisons of birthday will actually be made between every possible pair of individuals = 23 × 22/2 = 253 comparisons, which is well over half the number of days in a year (183 at most), as opposed to fixing on one individual and comparing their birthday to everyone else's birthday.\n", "BULLET::::- Birthday parties should be celebrated on or after one's birthday, not before. So when one's birthday falls during the week, it's best to celebrate the following weekend. And never give someone birthday wishes before their birthday.\n", "BULLET::::- Birthdays are the most common type of anniversary, on which someone's birthdate is commemorated each year. The actual celebration is sometimes moved for practical reasons, as in the case of an official birthday.\n", "The birthday problem asks, for a set of randomly chosen people, what is the probability that some pair of them will have the same birthday? By the pigeonhole principle, if there are 367 people in the room, we know that there is at least one pair who share the same birthday, as there are only 366 possible birthdays to choose from (including February 29, if present). \n" ]
why do we feel the need to play with our phone or read something while pooping?
It's boring. We need something to keep our minds occupied. Reader's Digest was the original smartphone for that.
[ "For students who know how to read, but need extra encouragement, giving a book talk is a way to inspire reading. It is an especially effective tool with reluctant readers who need a hook before they will invest the energy into reading a book. Reading motivation for children can be enhanced when it is read with songs or music playing.\n", "We have become so used to using the internet and different websites that we do not read them any more but rather scan through them because we are usually in a hurry to find something and have become so used to web pages that there is no need for us to read through them completely as we can successfully filter through and find only the information we need and read more about it should the information found not suffice our needs.\n", "More recently, they have turned their attention to how learning to read may depend on a process of \"neuronal recycling\" that causes brain circuits originally evolved for object recognition to become tuned to recognize frequent letters, pairs of letters and words, and have tested these ideas examining brain responses in a group of adults who did not learn to read due to social and cultural constraints.\n", "Liberman also examined why reading is more difficult than speech perception. He attributed this greater difficulty to the human biological adaptation to speech. Liberman discovered that children who fail to learn to read on schedule lack phonemic awareness. Phonemic awareness is an awareness that word forms breaks down into individual parts. This is because they cannot appreciate the alphabetic principle.\n", "Texting on a phone distracts participants, even when the texting task used is a relatively simple one. Stavrinos et al. investigated the effect of other cognitive tasks, such as engaging in conversations or cognitive tasks on a phone, and found that participants actually have reduced visual awareness. This finding was supported by Licence et al., who conducted a similar study. For example, texting pedestrians may fail to notice unusual events in their environment, such as a unicycling clown. These findings suggest that tasks that require the allocation of cognitive resources can affect visual attention even when the task itself does not require the participants to avert their eyes from their environment. The act of texting itself seems to impair pedestrians' visual awareness. It appears that the distraction produced by texting is a combination of both a cognitive and visual perceptual distraction. A study conducted by Licence et al. supported some of these findings, particularly that those who text while walking significantly alter their gait. However, they also found that the gait pattern texters adopted was slower and more \"protective\", and consequently did not increase obstacle contact or tripping in a typical pedestrian context.\n", "In general, go players refer to analysis of positions as \"reading\". One major purpose of reading is to be sure that a local position can be neglected for a while. For instance, a player may be able to make gains by playing for a certain patch of territory. Yet, this play may be worth only a few points, and thus deemed unnecessary, depending on the state of the game. With confidence in one's reading, it becomes much easier to set priorities and switch around the board (see sente). Not changing gears at the correct time can be a loss of opportunity.\n", "Students learn when they are motivated and curious about something. Traditional verbal instructions can be boring and painful for students. However, use of audio-visual provides intrinsic motivation to students by peaking their curiosity and stimulating their interests in the subjects.\n" ]
why does stroking animals relax/calm us down?
i covered this topic in a class in university way back in the caveman days they would sit around the fire with their half wild dogs stroking their fur elicited the guard guard guard instinct in the animal thats the theory anyways so basically the theory is we were able to relax knowing we were protected
[ "Humans also often seek to mimic animals' communicative signals in order to interact with them. For example, cats have a mild affiliative response of slowly closing their eyes; humans often mimic this signal towards a pet cat to establish a tolerant relationship. Stroking, petting and rubbing pet animals are all actions that probably work through their natural patterns of interspecific communication.\n", "When no premedications are used, alfaxalone causes animals (especially cats) to be agitated when recovering. Dogs and cats will paddle in the air, vocalize excessively, may remain rigid or twitch, and have exaggerated reactions to external stimuli such as light and noise. For this reason, it is recommended that animals recovering from anesthesia by alfaxalone stay in a quiet, dark area.\n", "Animals sense that Chat can understand them and become very friendly around her. Even when an animal is normally aggressive, Chat can gain that animal's loyalty (she once got a criminal's bulldog to turn on his owner by telling him his master was \"bad\"). Chat often uses this power to calm down nervous and wounded animals at animal rescue centers.\n", "Because dogs often bark excessively due to stress, boredom, or frustration, changing aspects of an animal's environment to make them more content is a suitable way to quiet them down, rather than forcibly silencing a distressed animal. Spending more time with an animal, such as playing, walking, and other bonding activities, will keep them occupied and make them feel more at ease. If the animal is stressed, it is best to remove the object that is causing them discomfort.\n", "Parental soothing (by rocking, holding etc) in infancy lays the foundations of the capacity to self-calm. Thereafter transitional objects can help maintain calmness, while pets as self-objects also promote soothing and calm.\n", "Comfort behaviours are performed from an early age and change little during development. Several comfort behaviours are associated with the beginning of a rest period (e.g. grooming), whereas others are associated with the end of a rest period (e.g. stretching), possibly to prepare the body for escape or hunting. Others, (e.g. dust bathing) will be performed only when the appropriate internal and external stimuli are present (see also sham dustbathing). Animals generally perform comfort behaviours only when they are not engaged in essential activities (e.g. feeding, drinking, hunting, escape); these behaviours are therefore sometimes categorised as \"luxury activities\". However, animals can be highly motivated to perform some comfort behaviours (e.g. dust bathing in hens), and conditions that thwart these behaviours (e.g. battery cages) are considered to have a negative influence on animal welfare.\n", "Generally if any animal is anxious during a thunderstorm or any similar, practically harmless event (e.g. fireworks display), it is advised to simply continue behaving normally, instead of attempting to comfort animals. Showing fearlessness is, arguably, the best method to \"cure\" the anxiety.\n" ]
What affects continental drift?
Here's a reconstruction of the last ~250 million years, which basically shows the break up of Pangea. The thing to remember is that Pangea is only the most recent supercontinent; there have been at least 6 or 7 over Earth's 4.5 billion year history. _URL_0_ The driving force, very simply, is gravity. Thermal buoyancy in the mantle means that convection cells get set up, and these drag the surface plates along with them. Subduction oceanic slabs are a big part of this, as they draw dense cold material back down into the mantle. New oceanic crust gets formed in mid ocean ridges. There's practically no oceanic crust on the planet older than ~200 million years, while continental crust can be viewed as a silica-rich scum which is not dense enough to sink back into the mantle to get recycled. As a result continental crust is up to ~ 4 billion years old in places. Continents and supercontinents which have been formed can be rifted apart again by rising and divergent mantle convection cells - we can see this happening at the moment in the Afar region of E Africa, where a rift valley is forming which could ultimately form a new ocean basin. Meterorite impacts have had no recognised impact on plate tectonics (the timescales of mantle flow are in the millions of years).
[ "Continental drift is the theory which emerged in the early 20th Century that the Earth's continents have moved over geologic time relative to each other, thus appearing to have \"drifted\" across the ocean bed. The idea of continental drift was subsumed by the theory of plate tectonics in the mid-20th century. Plate tectonics explains that the continents move by riding on plates of the Earth's lithosphere. Frankel's four volume work, \"The Continental Drift Controversy\" (\"Volume 1: Wegener and the Early Debate; Volume 2: Paleomagnetic Support for Shifting Continents; Volume 3: Initiation of Seafloor Spreading; and Volume 4: Evolution into Plate Tectonics\"), published in 2012 by Cambridge University Press, is generally considered seminal and definitive in the field of earth sciences. The work is based upon critical analysis of the entire primary literature and Frankel's 35 years of active correspondence with the leading figures during the revolution's climactic final quarter.\n", "Continental drift is the theory that the Earth's continents have moved over geologic time relative to each other, thus appearing to have \"drifted\" across the ocean bed. The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596. The concept was independently and more fully developed by Alfred Wegener in 1912, but his theory was rejected by many for lack of any motive mechanism. Arthur Holmes later proposed mantle convection for that mechanism. The idea of continental drift has since been subsumed by the theory of plate tectonics, which explains that the continents move by riding on plates of the Earth's lithosphere.\n", "Continental drift without expansion was proposed by Frank Bursley Taylor, who suggested in 1908 (published in 1910) that the continents were moved into their present positions by a process of \"continental creep\". In a later paper he proposed that this occurred by their being dragged towards the equator by tidal forces during the hypothesized capture of the moon in the Cretaceous, resulting in \"general crustal creep\" toward the equator. Although his proposed mechanism was wrong, he was the first to realize the insight that one of the effects of continental motion would be the formation of mountains, and attributed the formation of the Himalayas to the collision between the Indian subcontinent with Asia. Wegener said that of all those theories, Taylor's, although not fully developed, had the most similarities to his own. In the mid-20th century, the theory of continental drift was referred to as the \"Taylor-Wegener hypothesis\", although this terminology eventually fell out of common use.\n", "In 1912 Alfred Wegener proposed the theory of Continental Drift. This theory suggests that the shapes of continents and matching coastline geology between some continents indicates they were joined together in the past and formed a single landmass known as Pangaea; thereafter they separated and drifted like rafts over the ocean floor, currently reaching their present position. Additionally, the theory of continental drift offered a possible explanation as to the formation of mountains; Plate Tectonics built on the theory of continental drift.\n", "Paleomagnetists led the revival of the continental drift hypothesis and its transformation into plate tectonics. Apparent polar wander paths provided the first clear geophysical evidence for continental drift, while marine magnetic anomalies did the same for seafloor spreading. Paleomagnetism continues to extend the history of plate tectonics back in time and are applied to the movement of continental fragments, or terranes.\n", "Alfred Wegener's theory of continental drift had never gained much scientific support due to its lack of any satisfactory mechanism to drive the process. During the 1950s, however, extensive surveys of the ocean floor revealed a global, linked system of mid-ocean ridges, all of which exhibited high thermal flow and considerable seismic activity. Hess hypothesized that new ocean crust was being formed at the ocean ridges by extrusions of magma from the Earth's mantle, and that convection currents within the mantle were continuously carrying the newly formed crust away from the ridge, widening the ocean basin and pushing the continents apart.\n", "Alfred Wegener proposed the theory of continental drift in 1912. He stated: \"the Mid-Atlantic Ridge ... zone in which the floor of the Atlantic, as it keeps spreading, is continuously tearing open and making space for fresh, relatively fluid and hot sima [rising] from depth\". However, Wegener did not pursue this observation in his later works and his theory was dismissed by geologists because there was no mechanism to explain how continents could plow through ocean crust, and the theory became largely forgotten.\n" ]
why we have the right to bear arms (guns), but not swords?
If the Congress of the United States tried to pass a law unreasonably restricting your right to keep and bear a sword, that law would be challenged on the same grounds as a law unreasonably restricting your right to keep and bear a gun. "Arms" means arms. It doesn't mean *fire*arms specifically.
[ "The people's right to have their own arms for their defense is described in the philosophical and political writings of Aristotle, Cicero, John Locke, Machiavelli, the English Whigs and others. Though possessing arms appears to be distinct from \"bearing\" them, the possession of arms is recognized as necessary for and a logical precursor to the bearing of arms. Don Kates, a civil liberties lawyer, cites historic English usage describing the \"right to keep and bear \"their private arms\".\"\n", "The right to keep and bear arms (often referred to as the right to bear arms) is the people's right to possess weapons (arms) for their own defense. Only few countries recognize people's right to keep and bear arms and protect it on statutory level, and even fewer protect the right on constitutional level.\n", "BULLET::::- 3. The right to keep and bear arms for the common defense, is a great political right. It respects the citizens on the one hand, and the rulers on the other; and although this right must be inviolably preserved, it does not follow that the legislature is prohibited from passing laws regulating the manner in which these arms may be employed.\n", "BULLET::::- 3. The right to keep and bear arms for the common defense, is a great political right. It respects the citizens on the one hand, and the rulers on the other; and although this right must be inviolably preserved, it does not follow that the legislature is prohibited from passing laws regulating the manner in which these arms may be employed.\n", "Generally, where modern constitutions refer to arms at all, the purpose is \"to allow the government to regulate their use or to compel military service, not to provide a right to bear them\". Constitutions which historically guaranteed a right to bear arms are those of Bolivia, Colombia, Costa Rica, Guatemala, Honduras, Liberia, Mexico, Nicaragua and the United States of America. Nearly all of the Latin American examples were modelled on that of the United States. At present, out of the world’s nearly 200 constitutions, three still include a right to bear arms: Guatemala, Mexico, and the United States; of these three, only the last does not include explicit restrictive conditions.\n", "The U.S. Supreme Court in the case \"District of Columbia v. Heller\", 554 U.S. 570 (2008) ruled that \"the right to bear arms\" is an individual right and a right to arms in common use are protected under the Second Amendment to the United States Constitution. The Court further ruled that this right applies against the states in \"McDonald v. Chicago\", 561 U.S. 742 (2010).\n", "The right to bear arms in English history is regarded in English law as a subordinate auxiliary right of the primary rights to personal security, personal liberty, and private property. According to Sir William Blackstone, \"The ... last auxiliary right of the subject ... is that of having arms for their [defense], suitable to their condition and degree, and such as are allowed by law. Which is ... declared by ... statute, and is indeed a public allowance, under due restrictions, of the natural right of resistance and self-preservation, when the sanctions of society and laws are found insufficient to restrain the violence of oppression.\"\n" ]
What are the greatest "missing" objects that are probably still in existence? (stolen etc.)
Actually, there are a lot of papyri and archeological pieces from the ancient Egypt which have never been studied by archeologists and egyptologists. These numerous missing objects are actually in the hands of collectionners. This is the result of the state of egyptology in the 18th and 19th centuries : Egyptology as a science just started with the decipherment of the hieroglyphics, in 1822. Before that, and until the creation of the Supreme Council of Antiquities in 1858 by Auguste Mariette, egyptian antiquities have been stolen because of their value and the mysticism attached to the old egyptian civilisation.
[ "The museum announced in July 2006, that 221 minor items, including jewelry, Orthodox icons, silverware and richly enameled objects, had been stolen. The value of the stolen items was estimated to be approximately $543,000 but by the end of 2006 several of the stolen items were recovered.\n", "Altogether, thirteen pieces were stolen at an estimated loss of $500 million, making the robbery the largest recorded private property theft in history. Empty frames remain hanging in the museum, both in homage to the missing works and as placeholders for their potential return. One of the paintings, \"The Concert\", was Gardner's first major acquisition and one of only 34 known Vermeer works in the world. It is thought to be the most valuable unrecovered stolen painting, with a value estimated at over $200 million. Another painting, \"The Storm on the Sea of Galilee\", is Rembrandt's only known seascape. The bronze finial was taken from the top of a Napoleonic flag, possibly appearing like gold to the thieves. The museum is offering a $100,000 reward for this piece alone.\n", "The stolen works had originally been purchased by art collector Isabella Stewart Gardner (1840–1924) and intended to be left on permanent display at the museum with the rest of her collection. Since the collection and its layout are permanent, empty frames remain hanging both in homage to the missing works and as placeholders for their potential return. Experts are puzzled by the choice of paintings that were stolen, especially since more valuable artwork was left untouched. Among the stolen works was \"The Concert\", one of only 34 known works by Vermeer and thought to be the most valuable unrecovered painting, valued at over $200 million. Also missing is \"The Storm on the Sea of Galilee\", Rembrandt's only known seascape. Other works by Rembrandt, Degas, Manet, and Flinck were also stolen.\n", "The stolen objects were: a small Japanese lacquered box on a stand, a sculpture in green soapstone, a red lacquered chalice with a lid, a chalice carved from a rhinoceros horn, a small blackened, bronze teapot and a plate made of musk wood. Several other pieces were damaged during the break-in. Detailed descriptions and photos of the stolen items can be found at the referenced link. , none of the stolen objects has been recovered and no arrests have been made.\n", "Ten objects, among them one of the inscribed rings, were stolen shortly after the find was made, and when the remaining objects were recovered, it was discovered that the other ring had been cut into at least four pieces by a Bucharest goldsmith, whereby one of the inscribed characters had become damaged to the point of illegibility. Fortunately, detailed drawings, a cast, and a photograph made by London's Arundel Society of the ring before it was damaged survive, and the nature of the lost character can be established with relative certainty.\n", "The larger find was intact but the smaller had been damaged by a plough. A previous landowner who visited the excavation commented that he had found metal wires around the find-spot several years earlier, but thinking that they were only steel wire, he had thrown them away. It was therefore concluded that the treasure had originally been even larger.\n", "In 2004, it was discovered that dozens of rare books from its collection had been stolen. The subsequent investigation revealed that the thief was a senior librarian working at the National Library. At least 62 books were stolen and only a few have been recovered, some with the aid of FBI. Some of the books still missing are works by Johannes Kepler, Thomas Hobbes, and Christiaan Huygens. The library maintains a list of the missing books.\n" ]
Why can't I remember a smell or taste the same way I can an image or a sound?
Perfumer here. With training any person would be able to replicate smells inside their heads as well as any visual or auditory input. The main problem is cultural. Our western society does not value the sense of smell as highly as other senses: children are not taught to notice odors, our olfactory "vocabulary" is really limited, we are not used to rely on our sense of smell on a day-to-day basis etc. The Jahai people in the Malayan peninsula is the best example I can remember of a culture that highly praises the sense of smell, having even specific vocabulary to describe odors: [an article on Cognitive magazine about that](_URL_0_) edit: formatting. edit 2: removing link to non-scientific article. edit 3: changed "remembering" to "replicating inside the head".
[ "The only thing that is currently agreed upon is that the brain does actually group different information, and many associations are instantly created when viewing or remembering images, numbers or sounds.\n", "An odor can cue recall of a distant memory. Most memories that pertain to odor come from the first decade of life, compared to verbal and visual memories which usually come from the 10th to 30th years of life. Odor-evoked memories are more emotional, associated with stronger feelings of being brought back in time, and have been thought of less often as compared to memories evoked by other cues.\n", "Certain smells can be associated with specific areas and help a person with vision problems to remember a familiar area. This way there is a better chance of recognizing an area's layout in order to navigate themselves through. The same can be said for people as well. Some people have their own special odor that a person with a more trained sense of smell can pick up. A person with an impairment of their vision can use this to recognize people within their vicinity without them saying a word.\n", "When odors activate the olfactory pathways that lead to the limbic portion of the brain they trigger the release of neurotransmitters that affect the brain and mental state of the individual in a variety of ways. Stimuli transmitted to the limbic system cannot be consciously blocked, so all olfactory stimuli influence our emotions. Smell has not been studied in as much depth as vision and hearing. The brain is able to process small differences in smell and the sense of smell may last longer in the aging process than sight and hearing. \n", "Recognition memory is not confined to the visual domain; we can recognize things in each of the five traditional sensory modalities (i.e. sight, hearing, touch, smell, and taste). Although most neuroscientific research has focused on visual recognition, there have also been studies related to audition (hearing), olfaction (smell), gustation (taste), and tactition (touch).\n", "Odor memory is weaker than visual memory, achieving a successful identification rate of only 70-80% of visual memory. Levels-of-processing effects have been found within odor memory if subjects are asked to \"visualize\" smells and associate them with a particular picture. Subjects who perform this task have a different recall value on explicit memory tests than subjects who memorize smells using self-chosen methods. The difference in recall value, however, depends on the subject, and the subject's ability to form images from odors. Attributing verbal attributes to odors has similar effects. Semantic processing of odors (e.g. attributing the \"mud\" odor to \"smell like a puddle\") has found to have the most positive effects on recall.\n", "An experiment from 1966 showed that people remember a group of words better if they are within the same theme category. Such words that generate recall by association are known as \"semantic cues\". If the sound of the word is emphasized during the encoding process, a cue that could be used could also put emphasis on the phonetic quality of the word.\n" ]
Anyone know of any mafia families who had their sons serve in World War II? Any post-WWII crime bosses who were veterans?
One of my favorite fiction books is *The Fortunate Pilgrim* by Mario Puzo, and it's about an Italian-American family living in New York. One of the sons of the family is involved with organized crime (the Italian mafia, if you will) and another is conscripted to go fight WWII. The dynamic between the brothers is great. I recommend reading it, especially if you're going to try to write something similar. It sounds like you intend to focus more on the war aspect than Puzo did (it's only a very short moment in the book), so I think you can easily avoid repeating any of his ideas.
[ "His life parallels that of his close friend Paolo Borsellino. They both spent their early years in the same neighbourhood in Palermo. Though many of their childhood friends grew up in the Mafia background, both men fought on the other side of the war as prosecuting magistrates. They were both killed in 1992, a few months apart. In recognition of their tireless effort and sacrifice during the anti-mafia trials, they were both awarded the Italian \"Medaglia d'oro al valore civile\" (Gold medal for civil valour). They were also named as heroes of the last 60 years in the 13 November 2006 issue of \"Time Magazine\".\n", "Born in San Giuseppe Jato. His grandfather and great-grandfather, both farmers, were made members of the Mafia. His father Bernardo Brusca, a local Mafia patriarch, served concurrent life sentences for numerous homicides. Bernardo Brusca allied himself with the Corleonesi of Salvatore Riina and Bernardo Provenzano when he replaced Antonio Salamone as capo mandamento of San Giuseppe Jato, paving the way for his three sons’ careers – apart from Giovanni, his younger brother Vincenzo and elder brother Emanuele.\n", "According to his army enlistment record, Louis Dragna spent two years in college. He started to become involved in the crime family in the 1940s. Under his uncle Jack, the Mafia in Los Angeles was growing into a very widespread enterprise. Louis has an arrest record dating back to 1946. Dragna became a made man in 1947 along with Jimmy Fratianno, Dominic Brooklier, Joseph Dippolito, and Salvatore \"Dago Louie\" Piscopo. Louis Dragna was eventually promoted to Captain (caporegime) in the family by his uncle. Some say that Louis never \"made his bones\" i.e. committed a murder on the Mafia's orders.\n", "In the years following World War I, in which one of his sons was killed, Maddocks had a reputation as an advocate for disabled ex-servicemen, and was an early member of the Imperial War Graves Commission. He once proposed that convicted criminals who were subsequently killed while serving in the armed forces should have their conviction records erased.\n", "The crime families originated out of New York City Sicilian Mafia gangs. Salvatore Maranzano formally organized them in the summer of 1931, after the April 15 murder of Giuseppe Masseria, in what has become known as the Castellammarese War. Maranzano introduced the now-familiar Mafia hierarchy: boss (\"capofamiglia\"), underboss (\"sotto capo\"), advisor (\"consigliere\"), captain (\"caporegime\"), soldier (\"soldato\"), and associate; and declared himself \"capo di tutti capi\" (boss of all bosses).\n", "Thomas \"Tommy\" Lucchese (born Gaetano Lucchese; ; December 1, 1899 – July 13, 1967) was an Italian American gangster and founding member of the Mafia in the United States, an offshoot of the \"Cosa Nostra\" in Sicily. From 1951 until 1967, he was the boss of the Lucchese crime family, one of the Five Families that dominates organized crime in New York City.\n", "The organization was allied with the Five Mafia Families—specifically the Luciano crime family—in New York, the Chicago Outfit in Chicago, and the Dragna crime family in Los Angeles (prior to Siegel's death). Cohen's family was the primary target for organized crime police squads, particularly the LAPD squad ran by Police Chief Bill Parker called the Gangster Squad, who also targeted Jack Dragna and the family during pre-Cohens reign.\n" ]
how to differentiate whether a person is chinese, japanese, korean, etc. (honest question - not meant to seem racist)
Sometimes you can tell by their surnames. Common Korean names are Kim, Park, Cho, or Han. Very simple. You can usually recognize a Japanese name, like Takahashi, Nakamura, Hayashi, Yamamoto, etc. - very different from Korean or Chinese names. Japanese names never start with V, X, or Z, but Chinese names may start with X or Z. Common Chinese names are Wang/Wong, Chang, Wu, Yang. But there is some overlap, of course, so use this with a grain of salt. A lot of Asians can't even differentiate by looks most of the time, so don't feel bad. Just ask politely like you're just curious and they probably won't mind telling you.
[ "The concept of as represented in Japanese makes no distinction between racial, ethnic, and national identities. Where the census of the United Kingdom, for example, separates \"ethnic or racial background\" from nationality, the Japanese Census and Statistics Bureau do not distinguish between the two.\n", "Chinese people in Japan include any people self-identifying as ethnic-Chinese or people possessing Chinese citizenship living in Japan. People aged 22 or older cannot possess dual-citizenship in Japan, so Chinese possessing Japanese citizenship typically no longer possess Chinese citizenship. The term \"Chinese people\" typically refers to the Han Chinese, the main ethnic group living in China (PRC) (including Hong Kong and Macau SARs), Taiwan (ROC), and Singapore. Officially, China (PRC) is home to 55 additional ethnic minorities, including people such as Tibetans, though these people might not self-identify as Chinese. Han Chinese people have had a long history in Japan (as a minority).\n", "Chinese people are the various individuals or ethnic groups associated with China, usually through ancestry, ethnicity, nationality, citizenship or other affiliation. Han Chinese, the largest ethnic group in China, at about 92% of the population, are often referred to as \"Chinese\" or \"ethnic Chinese\" in English, however there are dozens of other related and unrelated ethnic groups in China.\n", "In the Chinese culture, individuals often address their friends as juniors and seniors even if they are just a few months younger or older. When a Chinese person asks someone their age they often do this so they know how to address the person.\n", "Japanese statistical authorities do not collect information on ethnicity, only nationality. As a result, both native and naturalized Japanese citizens are counted in a single group. Although official statistics show near homogeneity, one analysis describe the population as “multi-ethnic”, although unofficial statistics still show that ethnic minorities are small compared with many other countries.\n", "They currently constitute the second largest ethnic minority group in Japan after Chinese immigrants due to many Koreans assimilating into the general Japanese population. The majority of Koreans in Japan are , often known simply as , who are the permanent ethnic Korean residents of Japan. The term Zainichi Korean refers only to long-term Korean residents of Japan who trace their roots to Korea under Japanese rule, distinguishing them from the later wave of Korean migrants who came mostly in the 1980s, and from pre-modern immigrants dating back to antiquity who may themselves be the ancestors of the Japanese people.\n", "Ethnic Han Chinese is not synonymous with speakers of the Chinese language. Many non-Han Chinese ethnicities, such as the Hui and Manchu, are essentially monolingual in Chinese, but do not identify as Han Chinese. The Chinese language itself is also a complex entity, and should be described as a family of related languages rather than a single language if the criterion of mutual intelligibility is used to classify its subdivisions.\n" ]
why do we have phobias that weren't a result of early experiences?
A fear of clowns deals with something known as the "uncanny valley". It applies to objects that are close enough to humans to be recognized as such, but they aren't quite "right". Features are drawn to be highly exaggerated. Your brain doesn't know how to react. "It's like me... But it's not. It might attack." It's the same reason that people are afraid of dolls. They're so familiar, but something is off.
[ "Another experience that doctors believe leads individuals to develop this phobia is children being abandoned, usually by their parents, when they are very young. This first causes childhood trauma that then persists to affect them as they grow up. This turns into autophobia because they are now afraid that all of the important people in their lives are going to leave or abandon them. Therefore, this particular phobia can come from behavior and experiences that these people have had when they were growing up. However, abandonment does not necessarily mean being left alone physically, this also includes being isolated financially or emotionally. Having drastic, life-altering experiences, particularly causes more trauma which makes this phobia worse. People that have very high anxiety and in this case are more “high strung,” are more susceptible to this phobia.\n", "Phobias are classified as a type of anxiety disorder. There is often no discernible cause of phobia onset, though Rachman describes three possibilities: classical conditioning, vicarious acquisition and informational/instructional acquisition. Occasionally they are triggered by harmful events surrounding the phobic object or situation - in this case, for example, severe sunburn, chronic light-triggered migraines, or trauma accompanied by bright sunlight.\n", "A childhood phobia is an exaggerated, intense fear “that is out of proportion to any real fear” found in children. It is often characterized by a preoccupation with a particular object, class of objects, or situation that one fears. A phobic reaction is twofold—the first part being the “intense irrational fear’ and the second part being “avoidance.”\n", "Phobophobia is mainly linked with internal predispositions. It is developed by the unconscious mind which is linked to an event in which phobia was experienced with emotional trauma and stress, which are closely linked to anxiety disorders and by forgetting and recalling the initiating trauma. Phobophobia might develop from other phobias, in which the intense anxiety and panic caused by the phobia might lead to fearing the phobia itself, which triggers phobophobia before actually experiencing the other phobia. The extreme fear towards the other phobia can lead the patient to believe that their condition may develop into something worse, intensifying the effects of the other phobia by fearing it. Also, phobophobia can be developed when anxiety disorders are not treated, creating an extreme predisposition to other phobias. The development of phobophobia can also be attributed to characteristics of the patient itself, such as phylogenetic influence, the prepotency of certain stimuli, individual genetic inheritance, age incidence, sex incidence, personality background, cultural influence inside and outside the family, physiological variables and biochemical factors. \n", "Causes of BII phobia have yet to be fully understood. There is a body of evidence which suggests the phobia has genetic underpinnings, though many phobics also cite a traumatic life event as a cause of their fear. The fainting response accompanying the phobia may have originated as an adaptive evolutionary mechanism.\n", "Phobias are a common form of anxiety disorder, and distributions are heterogeneous by age and gender. An American study by the National Institute of Mental Health (NIMH) found that between 8.7 percent and 18.1 percent of Americans suffer from phobias, making it the most common mental illness among women in all age groups and the second most common illness among men older than 25. Between 4 percent and 10 percent of all children experience specific phobias during their lives, and social phobias occur in one percent to three percent of children and adolescents.\n", "BULLET::::- Phobias Found in people of all ages. Characterized by an abnormal response to fear or danger. Persons diagnosed with Phobias suffer from feelings of terror and uncontrollable fear, exaggerated reactions to danger that in reality is not life-threatening, and is usually accompanied by physical reactions related to extreme fear: panic, rapid heartbeat, and/or shortened breathing.\n" ]
through what mechanism is a ventilator an effective treatment for respiratory illness?
The patient can still take extra breaths when the body is signaling it needs more oxygen, but a ventilator takes away the work of breathing (the energy required to move the diaphragm again and again). A patients diaphragm may not be able to keep up with inspiratory demands with the rest of the body needing energy for other things, such as fighting off the virus. I don’t remember exactly how much breathing is in terms of energy usage, but a ventilator (if set to the right deepness, pressure, and frequency of breaths) takes away that work so your body can put it to other uses.
[ "A medical ventilator (or simply ventilator in context) is a machine designed to provide mechanical ventilation by moving breathable air into and out of the lungs, to deliver breaths to a patient who is physically unable to breathe, or breathing insufficiently.\n", "Ventilators come in many different styles and method of giving a breath to sustain life. There are manual ventilators such as bag valve masks and anesthesia bags that require the users to hold the ventilator to the face or to an artificial airway and maintain breaths with their hands. Mechanical ventilators are ventilators not requiring operator effort and are typically computer-controlled or pneumatic-controlled.\n", "Mechanical ventilation is often a life-saving intervention, but carries potential complications including pneumothorax, airway injury, alveolar damage, ventilator-associated pneumonia, and ventilator-associated tracheobronchitis. Other complications include diaphragm atrophy, decreased cardiac output, and oxygen toxicity. One of the primary complications that presents in patients mechanically ventilated is acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). ALI/ARDS are recognized as significant contributors to patient morbidity and mortality.\n", "While in many cases mechanical ventilation is a life-saving or life-preserving intervention, it also has the potential to cause harm to the patient via ventilator-associated lung injury. A number of stresses may be induced by the ventilator on the patient's lung. These include barotrauma caused by pressure, volutrauma caused by distension of the lungs, rheotrauma caused by fast-flowing delivery of gases and atelectotrauma resulting from repeated collapse and re-opening of the lung.\n", "Ventilating or ventilation (the \"V\" in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.\n", "People with signs of inadequate respiration or oxygenation may need to be intubated and mechanically ventilated. Mechanical ventilation aims to reduce pulmonary edema and increase oxygenation. Ventilation can reopen collapsed alveoli, but it is harmful for them to be repeatedly opened, and positive pressure ventilation can also damage the lung by overinflating it. Intubation is normally reserved for when respiratory problems occur, but most significant contusions do require intubation, and it may be done early in anticipation of this need. People with pulmonary contusion who are especially likely to need ventilation include those with prior severe lung disease or kidney problems; the elderly; those with a lowered level of consciousness; those with low blood oxygen or high carbon dioxide levels; and those who will undergo operations with anesthesia. Larger contusions have been correlated with a need for ventilation for longer periods of time.\n", "Modern \"volume ventilators/respirators,\" which deliver an adjustable volume (amount) of air to the person with each breath, are valuable in the treatment of people with muscular dystrophy-related respiratory problems. The ventilator may require an invasive endotracheal or tracheotomy tube through which air is directly delivered, but for some people, noninvasive delivery through a face mask or mouthpiece is sufficient. Positive airway pressure machines, particularly bilevel ones, are sometimes used in this latter way. The respiratory equipment may easily fit on a ventilator tray on the bottom or back of a power wheelchair with an external battery for portability.\n" ]
Why did the Great Migration in US history start in the 1910s instead of earlier like after the Civil War (1865) or the end of Reconstruction (1877)?
Essentially you've hit the nail on the head with your last sentence > a perceived lack of opportunity in the North While the First Great Migration (1910-1930) was largely caused by the brutality of Jim Crow Laws and Lynchings, another reason were the increased job opportunities in the North, which largely didn't exist before 1910. The huge jump in Northern manufacturing capability required a massive boost in labor, which African-Americans would meet. Northern manufacturers like Henry Ford even sent men into the South to recruit black laborers for their factories. Before the Great Migrations, there was simply no pull to the North or West for African Americans.
[ "The decreases in population from 1910–1920, and from 1940–1960, were chiefly caused by different phases of the Great Migration, as African Americans left segregation and oppression of the South to seek better opportunities in the North, during the first phase, and in the West, especially California's defense industry, in the second phase. Tens of thousands of migrants left Louisiana during times of agricultural difficulties and the collapse of agricultural labor after mechanization.\n", "The Great Depression of the 1930s resulted in reduced migration because of decreased opportunities. With the defense buildup for World War II and with the post-war economic prosperity, migration was revived, with larger numbers of blacks leaving the South through the 1960s. After the political and civil gains of the Civil Rights Movement, in the 1970s migration began to increase again. It moved in a different direction, as blacks traveled to new regions of the South for economic opportunity.\n", "The Second Wave of Immigration reshaped American society in its diversity and urban numbers leading to an explosion of internal commerce and providing a consumer base for the coming industrial age. At 28 percent, the \"Gilded generation\" fighting the Civil War included a larger share of immigrants than any other generation in America since colonial times.\n", "As Reconstruction came to an end, between 1870 and 1890, the United States was undergoing a massive population increase. Between 1890 and 1908, rapid industrialization and urbanization brought millions of European immigrants to the country.\n", "Railroads were the major growth industry, with the factory system, mining, and finance increasing in importance. Immigration from Europe, and the eastern states, led to the rapid growth of the West, based on farming, ranching, and mining. Labor unions became increasingly important in the rapidly growing industrial cities. Two major nationwide depressions—the Panic of 1873 and the Panic of 1893—interrupted growth and caused social and political upheavals. The South, after the Civil War, remained economically devastated; its economy became increasingly tied to commodities, cotton, and tobacco production, which suffered from low prices. With the end of the Reconstruction era in 1877, African-American people in the South were stripped of political power and voting rights, and were left economically disadvantaged.\n", "The industrial buildup to World War II acted as a \"pull\" factor in the second phase of the Second Great Migration starting in 1940 and lasting until 1970. Altogether in the first half of the 20th century, 6.5 million African Americans migrated from the South to leave lynchings and segregation behind. Unlike the first round, composed chiefly of rural farm workers, the second wave included more educated workers and their families who were already living in Southern cities and towns. In this migration, many left for Western cities in addition to Northeastern and Midwestern cities, as defense industries recruited tens of thousands to higher-paying, skilled jobs. They settled in Los Angeles, San Francisco, Oakland, Phoenix, Portland, and Seattle.\n", "When the Great Migration started in the 1910s, white southern elites seemed to be unconcerned, and industrialists and cotton planters saw it as a positive, as it was siphoning off surplus industrial and agricultural labor. As the migration picked up, however, southern elites began to panic, fearing that a prolonged black exodus would bankrupt the South, and newspaper editorials warned of the danger. White employers eventually took notice and began expressing their fears. White southerners soon began trying to stem the flow in order to prevent the hemorrhaging of their labor supply, and some began attempting to address the poor living standards and racial oppression experienced by Southern blacks in order to induce them to stay.\n" ]
The ocean level stands for 0 high. If the ocean level rises, will the understanding of 0 high change too?
The notion of 'sea level' isn't actually the current sea level because that changes from year to year and more profoundly from place to place. Weather, moon, the geography of the water body in the area, and climate change, are just a few of the things that change 'actual' sea level (this is all from [Wikipedia](_URL_0_)). In science, people are usually trying to describe a standard pressure, which has been generally agreed upon as [standard sea level](_URL_1_) or 101.325 kPa. As for other uses of 'sea-level' where you're literally talking about water level and not just the pressure of a standard system, you're pretty much stuck using the mean water-level or whatever makes sense in the context of what's being described. I doubt that standard pressure will be adjusted anytime soon for increasing global water levels, only because there already remains such a vast variation in sea levels and pressures for the reasons I listed above, but even moreso because the past century of science uses the standard for pretty much everything. And finally, I'm not sure exactly what you're talking about when you say 0, but you might be talking about a specific datum? > In the UK, the Ordnance Datum (the 0 metres height on UK maps) is the mean sea level measured at Newlyn in Cornwall between 1915 and 1921. Prior to 1921, the datum was MSL at the Victoria Dock, Liverpool. TL;DR: Standard pressure references probably won't change, but sea-level has already been changing quite profoundly depending on how you look at it.
[ "The \"global mean sea level is projected rise (relative to 1986-2005) by 0.26 to 0.77m by 2100 for 1.5°C global warming\" and about 0.1m more for 2°C. A difference of 0.1m may correspond to 10 million more or fewer people exposed to related risks.\n", "Mean sea level (MSL) (often shortened to sea level) is an average level of the surface of one or more of Earth's bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised geodetic datumthat is used, for example, as a chart datum in cartography and marine navigation, or, in aviation, as the standard sea level at which atmospheric pressure is measured to calibrate altitude and, consequently, aircraft flight levels. A common and relatively straightforward mean sea-level standard is instead the midpoint between a mean low and mean high tide at a particular location.\n", "Relative sea level (abbreviated as RSL) is defined as the sea level that is observed with respect to a land-based reference frame. It is often contrasted with eustatic sea level, which is a measure of the total mass or volume of the oceans. Relative sea level can change by the processes changing eustatic sea level (e.g. ice melt and thermal expansion), but also by changes on land such as subsidence and isostatic rebound.\n", "As the mean level of the sea floor decreases, the volume of the ocean basins increases, and if other factors that can control sea level remain constant, sea level falls. The converse is also true: younger oceanic lithosphere leads to shallower oceans and higher sea levels if other factors remain constant.\n", "Like in the Atlantic, the global sea level kept on rising during the Subboreal but at a much slower rate. The increase amounted to about 1 m, which corresponds to a rate of 0.3 mm per year. At the end of the Subboreal, the sea level was about 1 m below the current value.\n", "IPCC (2007a:13, 14) projected sea level rise to the end of the 21st century using the [[Special Report on Emissions Scenarios|SRES]] emission [[economics of global warming#Scenarios|scenarios]]. Across the six SRES marker scenarios, sea level was projected to rise by 18 to 59 cm (7.1 to 23.2 inches). This projection was for the time period 2090–2099, with the increase in level relative to average sea levels over the 1980–1999 period. Due to a lack of scientific understanding, this sea level rise estimate does not include all of the possible contributions of ice sheets.\n", "The eustatic sea level is the distance from the center of the earth to the sea surface. An increase of the eustatic sea level can be generated by decreasing glaciation, increasing spreading rates of the mid-ocean ridges or more mid-oceanic ridges. Conversely, increasing glaciation, decreasing spreading rates or fewer mid-ocean ridges lead to a fall of the eustatic sea level.\n" ]
why does bacteria grow faster at certain temperature?
All bacteria have certain temperatures that their enzymes, or proteins in their bodies which process nutrients and other things perform at the maximum rate. As the environment temperature increases, enzyme action increases until it reaches a high enough temperature that enzymes denature, meaning that their substrate area (where enzymes attach to food) unfold, therefore not allowing them to interact with what they are supposed to. As temperature gets colder, enzymes simply work at a slower pace. So I guess the basic answer to your question is that temperature speeds up enzyme activity, allowing them to process nutrients faster allowing for faster growth. Sorry for the lengthy response...
[ "External conditions such as acidity and temperature affect the growth rates of \"Lactobacillus sanfrancisco\". One study found that of temperature of 33 °C (91 °F) leads to maximum growth rates, whereas temperatures over 41 °C (105 °F) completely inhibit the bacteria growth. Ideal and maximum growth temperatures of other organisms may be quite different; for instance a common yeast in sourdough, \"Candida milleri\", prefers 27 °C (81 °F) and will not grow above 36 °C (97 °F).\n", "Environmental factors influence rate of bacterial growth such as acidity (pH), temperature, water activity, macro and micro nutrients, oxygen levels, and toxins. Conditions tend to be relatively consistent between bacteria with the exception of extremophiles. Bacterium have optimal growth conditions under which they thrive, but once outside of those conditions the stress can result in either reduced or stalled growth, dormancy (such as formation spores), or death.\n", "All bacteria have their own optimum environmental surroundings and temperatures in which they thrive. Many factors are responsible for a given organism's optimal temperature range, but evidence suggests that the expression of particular genetic elements (alleles) can alter the temperature-sensitive phenotype of the organism. A recently published study demonstrated that mesophilic bacteria could be genetically engineered to express certain alleles from psychrophilic bacteria, consequently shifting the restrictive temperature range of the mesophilic bacteria to closely match that of the psychrophilic bacteria.\n", "Temperature plays a huge role in the survival of \"B. abortus\". The bacteria can survive for a longer period of time if they are at a cooler temperature. This is why it can transmit through liquids like milk and tap water. \"B. abortus\" can last a lot longer in animals if they aren’t watched closely and if the cattle aren’t getting treatment for it. In humans, it can be caught after noticing signs and the correct tests to determine the type of bacteria.\n", "In general, bacteria are about 1/10 the size of mammalian cells and produce perhaps 1/10 as much metabolic heat-i.e. ca. 3x10 W/cell. Thus, compared to mammalian cells (see above) ca. 10X as many bacteria—ca. 330,000—must be present to produce detectable heat flow—i.e. 1 μW. However, many bacteria replicate orders of magnitude more rapidly in culture than mammalian cells, often doubling their number in a matter of minutes (see Bacterial growth). As a result, a small initial number of bacteria in culture and initially undetectable by IMC rapidly produce a detectable number. For example, 100 bacteria doubling every 20 minutes will in less than 4 hours produce 330,000 bacteria and thus an IMC-detectable heat flow. Consequently, IMC can be used for easy, rapid detection of bacteria in the medical field. Examples include detection of bacteria in human blood platelet products (Trampuz et al. 2007) and urine (Bonkat \"et al.\" 2011) and rapid detection of tuberculosis (Braissant et al. 2010, Rodriguez et al. 2011). Fig. 7 shows an example of detection times of Tuberculosis bacteria as a function of the initial amount of bacteria present in a closed IMC ampoule containing a culture medium.\n", "The optimum temperature range for bacterial growth and host symptom development is between 25° to 30 °C. A slower rate of growth is observed at temperatures as low as 5 °C and up to 35 °C. However, infected hosts are symptomless below 18 °C.\n", "Different species of bacteria are able to survive at different temperature ranges. Ones living optimally at temperatures between 35–40 °C are called mesophiles or mesophilic bacteria. Some of the bacteria can survive at the hotter and more hostile conditions of 55–60 °C, these are called thermophile.Methanogens come from the domain of archaea. This family includes species that can grow in the hostile conditions of hydrothermal vents. These species are more resistant to heat and can therefore operate at high temperatures, a property that is unique to thermophile.\n" ]
if double jeopardy exists, why can a judge overturn a sentencing and retry someone?
He was already found guilty, the issue here is that the sentence for the guilt was out of line considering the sentencing guidelines. Double Jeopardy protects from being tried again for the same crime (decision of guilt or not), not protection from an improper trial (hung jury, mistrial, etc).
[ "The Court also explained why the Double Jeopardy Clause permits a second prosecution following reversal for trial error—such as flawed jury instructions, evidentiary rulings, or prosecutorial misconduct—but not for evidentiary insufficiency. Because trial errors \"impl[y] nothing with respect to the guilt or innocence of the defendant,\" the Court reasoned, \"[i]t would be a high price indeed for society to pay were every accused granted immunity from punishment because of any defect sufficient to constitute reversible error in the proceedings leading to conviction.\" Where trial error occurs, a defendant \"has a strong interest in obtaining a fair readjudication of his guilt free from error, just as society maintains a valid concern for insuring that the guilty are punished.\" The same cannot be said after a reversal for insufficiency of the evidence, where the prosecution has already had \"one fair opportunity to offer whatever proof it could assemble.\" What is more, the Court observed, it is no small matter for a reviewing court to reverse a conviction on these grounds, as it \"must sustain the verdict if there is substantial evidence, viewed in the light most favorable to the Government, to uphold the jury's decision.\" The \"prosecution's failure [will be] clear\" in cases where a reviewing court holds otherwise.\n", "The double jeopardy rule means that a person cannot be tried more than once for the same offence. It is an important safeguard to acquitted defendants, but there is an important general public interest in ensuring that those who have committed serious crimes are convicted of them. The Stephen Lawrence Inquiry Report recognised that the rule is capable of causing grave injustice to victims and the community in certain cases where compelling fresh evidence has come to light after an acquittal. It called for a change in the law to be considered, and we have accepted that such a change is appropriate. The European Convention on Human Rights (Article 4(2) of Protocol 7) explicitly recognises the importance of being able to re-open cases where new evidence comes to light.\n", "Finally, the Court had held in \"Forman v. United States\" that a new trial following a reversal—no matter the ground—never constitutes double jeopardy: \"It is elementary in our law that a person can be tried a second time for an offense when his prior conviction for that same offense has been set aside by his appeal.\"\n", "In many European countries, the prosecution may appeal an acquittal to a higher court. This is not regarded as double jeopardy, but as a continuation of the same case. The European Convention on Human Rights permits this by using the phrase \"\"finally\" acquitted or convicted\" (emphasis added) as the trigger for prohibiting subsequent prosecution.\n", "Among other things, \"[t]he Double Jeopardy Clause forbids a second trial for the purpose of affording the prosecution another opportunity to supply evidence which it failed to muster in the first proceeding.\" The Clause does so to \"protect an individual from being subjected to the hazards of trial and possible conviction more than once for an alleged offense.\" An acquittal triggers this protection. As the Court recently explained: '[T]he law attaches particular significance to an acquittal,' \"United States v. Scott\", so a merits-related ruling concludes proceedings absolutely. This is because '[t]o permit a second trial after an acquittal, however mistaken the acquittal may have been, would present an unacceptably high risk that the Government, with its vastly superior resources, might wear down the defendant so that ‘even though innocent he may be found guilty,’. And retrial following an acquittal would upset a defendant's expectation of repose, for it would subject him to additional 'embarrassment, expense and ordeal' while 'compelling him to live in a continuing state of anxiety and insecurity.'\"\n", "If a criminal case is brought to trial and the defendant is acquitted, jeopardy is attached to the case and it can never be retried. If the defendant was convicted and his conviction is overturned, jeopardy is not attached because the defendant is considered to simply be in the same state they were before the case was tried.\n", "Before the Supreme Court, Blueford argued that the Double Jeopardy Clause prohibits a retrial on charges of capital murder and first-degree murder because the foreperson's report that the jury had unanimously voted against those charges acquitted him of those charges. Blueford asserted that even though the jury had not filled out a formal form verdict, the foreperson's clear announcement in open court that the jury had unanimously voted to acquit Blueford of charges constituted a final verdict of acquittal. Additionally, Blueford argued that because the trial court had instructed the jury to consider the lesser included charges only if the jury had unanimously voted to acquit on the more serious charge, the jury's deadlock on manslaughter established that it had acquitted Blueford on capital murder and first-degree murder. Blueford also contended that because a conviction of a lesser included offense implicitly acquits on a more serious offense, a deadlock on a lesser included offense must also implicitly acquit on a more serious offense.\n" ]
Quick high school chemistry question
They're both technically correct, but your dad is correcter.
[ "After the on-line questions, students will take a test about what they have learned while solving the on-line questions. First grade students in high school take this test. The questions are based on basic chemistry. The test can determine how much the students understand basic chemistry. 80 well-ranked students can join the Summer school 1. About one organic chemistry questions appear in the test. All the tests are held in Konkuk University.\n", "\"When a freshman girl comes over to a chemistry class, she perhaps leaves a class in cookery, meal planning, or color and design, which has held her interest because of her familiarity with that work and her sympathetic attitude toward it. Entering her chemistry class, she is bewildered by the array of unrecognized pieces of apparatus and the unfamiliar terms used. Can we wonder at the lack of attention in chemistry class as we begin to discuss the law of multiple proportion or the percentage of iron in certain ores? Yet we can demand that attention if we approach the subject by an explanation of how our grandmothers used iron pots and kettles, black and unattractive, heavy and hard to handle, while all the time in the clay around there was an abundance of aluminum.\"\n", "The Department of chemistry was established in the year 2000 with the destination of offering basic knowledge to the undergraduate students in Science and Technology. It fulfills the basic needs of undergraduate students and strengthens their knowledge in Chemistry.\n", "The School of Chemistry admits students to its M.Sc. and Ph.D. programmes. The school's curriculum covers all branches of chemistry in keeping with the interdisciplinary nature of the subject today. The school's research and its faculty have gained wide recognition.\n", "Others point out that, for example, secondary school students will never study the advanced physics that underlies chemistry in the first place. “[I]nclined planes (frictionless or not) didn't come up in ... high school chemistry class ... and the same can be said for some of the chemistry that really makes sense of biological phenomena.” For physics to be relevant to a chemistry course, students have to develop a truly fundamental understanding of the concepts of energy, force, and matter, beyond the context of specific applications like the inclined plane.\n", "The first part contains 60 multiple-choice questions. Each question has four answer choices. The questions are loosely grouped into 10 sets of 6 items; each set corresponds to a different chemistry topic. Typically, the topics are, in order, descriptive chemistry/laboratory techniques, stoichiometry, gases/liquids/solids, thermodynamics, kinetics, equilibrium, electrochemistry, electronic structure/periodic trends, bonding theories, and organic chemistry. There is no penalty for guessing; a student's score is equal to the number of questions answered correctly. One and a half hours (90 minutes) are allotted for this first part.\n", "programs in chemistry with the participation of Professor Mustafin: the editor of the program Lyudmila Boiko, a philologist, recollects that the most interesting lessons in chemistry were given to her by professor Mustafin in recording TV programs; to this day she remembers his curious parallels and witty notes. For example, Mustafin stated that chemical reaction is similar to a performance, in which all characters are known, and chemical thermodynamics allows one to peep behind the curtain and find out what will become with the heroes of this performance as a result of the\n" ]
why do waterproof materials (tents and shower curtains) let water through when something touches it?
They're not really waterproof, is the simple answer. They're mostly waterproof, and rely on angles to shed and wick the water away faster than it would drip out the other side. This means you can make a relatively light and inexpensive material that still allows for airflow. As to why your finger makes it come through, it's basically surface tension. When there's nothing touching the inside, the water sticks together and drains down, but when you touch it, the water can stick together and flow onto your finger.
[ "Waterproof/breathable fabrics resist liquid water passing through, but allow water vapour to pass through. Their ability to block out rain and snow while allowing vapour from sweat to evaporate leads to their use in rainwear, waterproof outdoor sports clothing, tents, and other applications.\n", "Tent fabric may be made of many materials including cotton (canvas), nylon, felt and polyester. Cotton absorbs water, so it can become very heavy when wet, but the associated swelling tends to block any minute holes so that wet cotton is more waterproof than dry cotton. Cotton tents were often treated with paraffin to enhance water resistance. Nylon and polyester are much lighter than cotton and do not absorb much water; with suitable coatings they can be very waterproof, but they tend to deteriorate over time due to a slow chemical breakdown caused by ultraviolet light. The most common treatments to make fabric waterproof are silicone impregnation or polyurethane coating. Since stitching makes tiny holes in a fabric seams are often sealed or taped to block these holes and maintain waterproofness, though in practice a carefully sewn seam can be waterproof.\n", "Some garments, and tents, are designed to give greater or lesser protection against rain. For urban use raincoats and jackets are used; for outdoor activities in rough weather there is a range of hiking apparel. Typical descriptions are \"showerproof\", \"water resistant\", and \"waterproof\". These terms are not precisely defined. A showerproof garment will usually be treated with a water-resisting coating, but is not rated to resist a specific hydrostatic head. This is suitable for protection against light rain, but after a short time water will penetrate. A water-resistant garment is similar, perhaps slightly more resistant to water but also not rated to resist a specific hydrostatic head. A garment described as waterproof will have a water-repellent coating, with the seams also taped to prevent water ingress there. Better waterproof garments have a membrane lining designed to keep water out but allow trapped moisture to escape (\"breathability\")—a \"totally\" waterproof garment would retain body sweat and become clammy. Waterproof garments specify their hydrostatic rating, ranging from 1,500 for light rain, to 20,000 for heavy rain.\n", "The application of External Wall Insulation can help to deal with rain penetration problems through solid walls by blocking wind-driven rain. However, it can also make the problem worse if poor detailing (e.g. around eaves) allows water to pass behind the external wall insulation where it can become trapped. A high standard of design and installation should therefore be insisted upon. The dangers of not adequately designing and specifying these systems is dealt with in a research paper written by Joe Malone and published in the CIOB's Construction, Research and Innovation Journal (Volume 4, Issue 4, Dec 2013 The Risky Business of Covering Up)\n", "Basic outdoor clothing materials are goose down, wool, polyester, and polyolefin, which provide similar degrees of insulation when dry. Wool and polyesters perform reasonably well for most weather conditions and provide some insulation while wet. Cotton/linen wicks moisture, good for hot/humid weather. Cotton, linen and down lose insulation when wet unless they are treated to be water-resistant.\n", "In a rainscreen the air gap allows the circulation of air on the moisture barrier. (These may or may not serve as a vapour barrier, which can be installed on the interior or exterior side of the insulation depending on the climate). This helps direct water away from the main exterior wall which in many climates is insulated. Keeping the insulation dry helps prevent problems such as mold formation and water leakage. The vapour-permeable air/weather barrier prevents water molecules from entering the insulated cavity but allows the passage of vapour, thus reducing the trapping of moisture within the main wall assembly.\n", "Weatherstripping around openings – especially doors and windows – is used in buildings to keep out weather, increase interior comfort, lower utility bills, and reduce noise. Builder weatherstripping can be made from felt; vinyl, rubber, or poly foam; EPDM cellular rubber and vinyl tubing; and metals such as brass and aluminum.\n" ]
how is space debris tracked?
The [US Space Surveillance Network](_URL_0_) includes both ground-based sensors and satellites that do the tracking.
[ "Measurements of near-Earth orbital debris are accomplished by conducting ground-based and space-based observations of the orbital debris environment. Data is acquired using ground-based radars and optical telescopes , space-based telescopes, and analysis of spacecraft surfaces returned from space. Some important data sources have been the U.S. Space Surveillance Network, the Haystack X-Band Radar, and returned surfaces from the Solar Max, Long Duration Exposure Facility (LDEF), and the Space Shuttle spacecraft. The data provide validation of the environment models and identify the presence of new sources.\n", "Radar and optical detectors such as lidar are the main tools for tracking space debris. Although objects under have reduced orbital stability, debris as small as 1 cm can be tracked, however determining orbits to allow re-acquisition is difficult. Most debris remain unobserved. The NASA Orbital Debris Observatory tracked space debris with a liquid mirror transit telescope. FM Radio waves can detect debris, after reflecting off them onto a receiver. Optical tracking may be a useful early-warning system on spacecraft.\n", "As of April 2019, 3,000 of the 10,000 pieces of space debris routinely tracked by the US Military as a threat to the International Space Station were known to have originated from the 2007 satellite shoot down.\n", "On flight day two, the crew deployed the Orbital Debris Radar Calibration System-II (ODERACS-II) to help characterize orbital debris environment for objects smaller than 10 centimeters (about four inches) in diameter. Complement of six target objects of known dimensions and with limited orbital lifespans released into orbit and tracked by ground-based radars, allowing precise calibration of radars so they can more accurately track smaller pieces of space debris in low Earth orbit.\n", "The system was also tested for space debris tracking and the radars were proven to be capable of statistical observations of Low-Earth orbit (LEO) debris (altitudes of 500 to 1500 km) down to 2 cm in size. Since these measurements are insufficient to determine complete orbits, the radar has only limited space surveillance value. Because the space debris tracking change is only a dedicated back-end computer system, the primary EISCAT observations are not compromised. As a result of that, the EISCAT radars allow continuous monitoring of the LEO debris in a beam park mode, functioning as a space surveillance system part of the European Space Agency's Space Situational Awareness Programme (SSA).\n", "Returned space hardware is a valuable source of information on the directional distribution and composition of the (sub-millimetre) debris flux. The LDEF satellite deployed by mission STS-41-C \"Challenger\" and retrieved by STS-32 \"Columbia\" spent 68 months in orbit to gather debris data. The EURECA satellite, deployed by STS-46 \"Atlantis\" in 1992 and retrieved by STS-57 \"Endeavour\" in 1993, was also used for debris study.\n", "The Earth-Orbital Debris Collection (ODC) experiment was deployed on the Mir space station for 18 months during 1996–97 and used aerogel to capture particles from low Earth orbit, consisting of interplanetary dust and man-made particles. Far from being \"the last sample-return mission... in... twenty years\", ODC was a portable version of an LDEF collector, decreasing collection time significantly, and effective area by orders of magnitude.\n" ]
how can a founder of a company, like papa john, be forced to step down from ceo
Papa John's is a publicly traded company. This means that individuals can buy portions of the company called "shares" and the company can use that money to invest and grow. John Schnatter kept 25% of the company for himself when they went public, but the other 75% was sold in order to grow the brand. The shareholders are represented by a board of directors. Schnatter has a lot of power, but if they all agreed he shouldn't be CEO then they can make him. They can choose a new CEO. What they *can't* do is take away his 25% of the company. So he still owns 25% of the company. He still will make millions and millions of dollars from Papa John's. He just doesn't actually *run* the company any more.
[ "In the three years subsequent to the firm being founded, Wasserman concluded 50% of founder CEOs step down. The following year, another 10% step down and by the time the firm has an initial public offering less than 25% of founders still hold the CEO position. This being said, the decision to step down is not always voluntary, four out of five founder CEOs are forced to relinquish their role as CEO by investors.\n", "Founder CEO succession can occur through both voluntary and involuntary means. Noam Wasserman found in majority of founder CEO successions, the founder is forced to step down by investors. Founder CEOs who successfully execute product development or enter into negotiations with potential outside investors for additional capital have a higher likelihood of being replaced than those who are not as successful with product development and/or do not to raise additional capital. Indicated by several scholars, like Wasserman, as the CEO becomes successful in product development the needs of the firm expand and a mismatch between the current skills of the founder CEO and the new skills needed for the firm's success going forward is likely to occur, increasing the probability of succession. Founder CEOs are generally succeeded by someone from outside the firm. Founder CEO comebacks have occurred when the founder CEO was replaced and later returned to their role as CEO.\n", "The chastened CEO visits Pinnock's grieving widow and offers her the money that Louis lost when he was fired. She refuses it, and when Thomas awkwardly asks if she wants more, she bluntly says \"How much would ever be enough?\" and closes the door in his face as the movie ends.\n", "She served as president, chairwoman and CEO of the company until being forced to resign as a result of the ImClone insider trading case. As part of an agreement with the U.S. Securities and Exchange Commission (SEC), she was banned from serving in any role that would allow her to prepare, audit or disclose financial results of a public company until August 2011. In effect, this banned her from serving as an officer of her own company.\n", "She stepped down as CEO in June 2019 as a consequence of the attention paid to her co-ownership of NSO Group, an Israeli cyberweapons company whose software has allegedly been used by authoritarian regimes to spy on dissidents.\n", "\"CEOs are the world's unelected leaders. We are given positions of power that are conducive to leaders of a small country. Therefore, we are responsible to make all our decisions with people in mind and not just with the numbers they represent to us.\"\n", "On 30 March 2017, it was announced that Lapo Civiletti will be the first non-family CEO in the history of the company and will take up the role from 1 September, while Giovanni Ferrero will become the executive chairman focusing on long-term strategy.\n" ]
How do sunburns go away?
A sunburn isn't the same as a tan. Tans are caused by the production of melanin in the skin as a response to sun exposure. Sunburns are the layers of your skin literally being burned by sunlight, and the redness is caused by inflammation, not pigment. The redness goes away as healing occurs.
[ "Sunburn is caused by UV radiation, either from the sun or from artificial sources, such as tanning lamps, welding arcs, or ultraviolet germicidal irradiation. It is a reaction of the body to direct DNA damage from UVB light. This damage is mainly the formation of a thymine dimer. The damage is recognized by the body, which then triggers several defense mechanisms, including DNA repair to revert the damage, apoptosis and peeling to remove irreparably damaged skin cells, and increased melanin production to prevent future damage. Melanin readily absorbs UV wavelength light, acting as a photoprotectant. By preventing UV photons from disrupting chemical bonds, melanin inhibits both the direct alteration of DNA and the generation of free radicals, thus indirect DNA damage.\n", "Sunburn is an inflammatory response in the skin triggered by direct DNA damage by UV radiation. When the skin cells' DNA is overly damaged by UV radiation, type I cell-death is triggered and the skin is replaced.\n", "Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, commonly from the Sun. Common symptoms in humans and other animals include red or reddish skin that is hot to the touch, pain, general fatigue, and mild dizziness. An excess of UV radiation can be life-threatening in extreme cases. Excessive UV radiation is the leading cause of primarily non-malignant skin tumors. \n", "Sunburn causes an inflammation process, including production of prostanoids and bradykinin. These chemical compounds increase sensitivity to heat by reducing the threshold of heat receptor (TRPV1) activation from to . The pain may be caused by overproduction of a protein called CXCL5, which activates nerve fibres.\n", "Sunburn can occur in less than 15 minutes, and in seconds when exposed to non-shielded welding arcs or other sources of intense ultraviolet light. Nevertheless, the inflicted harm is often not immediately obvious.\n", "The differential diagnosis of sunburn includes other skin pathology induced by UV radiation including photoallergic reactions, phototoxic reactions to topical or systemic medications, and other dermatologic disorders that are aggravated by exposure to sunlight. Considerations for diagnosis include duration and intensity of UV exposure, use of topical or systemic medications, history of dermatologic disease, and nutritional status.\n", "Minor sunburns typically cause nothing more than slight redness and tenderness to the affected areas. In more serious cases, blistering can occur. Extreme sunburns can be painful to the point of debilitation and may require hospital care.\n" ]
why is rent control a bad thing?
One of the main reason capitalism works is that prices somewhat accurately reflect supply and demand. Rent control takes away this information. As a result, there isn't the same incentive to create new developments. Less new development means less supply, which would increase prices, but they're kept artificially low which compounds the problem. You end up with a situation where the government then has to step in to create new housing, because businesses don't find it profitable. How disastrous it ends up depends on how out of tune the government rent control is with what the open market prices would have been. This isn't like banking regulations or employment insurance though, it's a reduction of information that never ends well.
[ "Rent controls are often enacted due to public pressure and complaints regarding the cost of living. Proponents of rent controls argue that rent controls combat inflation, stabilize the economic characteristics of a city's population, prevent rent gouging, and improve the quality of housing. Capitalist economists have documented that rent control affects the supply and demand relationship in housing markets which can contribute to urban blight and does not provide the benefits its proponents advocate. Rent control contributes to urban blight by reducing new construction and investment in housing and deincentivizing maintenance. If a landlord's costs to perform maintenance consume too large a proportion of profit, that is revenue minus costs, from rent, the landlord will feel pressure to drastically reduce or eliminate maintenance entirely. This effect has been observed in New York City, a 2009 study by a lobbying firm found 29% of rent-controlled buildings were categorized as either deteriorated or dilapidated in contrast with 8% of non-rent-controlled housing .\n", "Paul Krugman writes that rent control inhibits construction of new housing, creates bitter tenant–landlord relations, and in markets with not all apartments under rent control, causes an increase in rents for uncontrolled units. \n", "Rent price controls remain the most controversial element of a system of rent regulation. Historically, economists such as Adam Smith and David Ricardo viewed landlords as producing very little that was valuable, and so regarded \"rents\" as an exploitative concept. (Economists note that the land value tax is a way to capture this un-earned value.) Modern rent controls (sometimes called rent leveling or rent stabilization) are intended to protect tenants in privately owned residential properties from excessive rent increases by mandating gradual rent increases, while at the same time ensuring that landlords receive a return on their investment that is deemed fair by the controlling authority, which might, or might not be a legislature.\n", "The issues involved in rent control are complex and compelling, with multiple dimensions: personal, social, economic, political, legal. Often debates and discussions are at risk of provoking a competition between overstatements. Some proponents may call every raise \"rent gouging\" while some opponents say rent control leads to slums. \"The range of assertions by rent control combatants [can be] astonishing.\" In the worse case, the \"debate becomes a hollow clash of extremes, and the results are an uninformed electorate, rash policy, and a divided community.\" In 'second generation rent control' the issues have become more articulated, yet still contested.\n", "Generally economists find fault with how rent control works over time: it reduces the supply of housing. In making the opposition argument, such general principles have been applied to California. Pro-rent control arguments are usually adopted by cities when enacting ordinances establishing rent control (see above).\n", "Economic conclusions are subject to interpretation by the public. Rent control that lowers rents for some can work to raise rents for others. Is it to be deemed 'good for society' if the total benefit amount to those favored with lower rents via rent control is cancelled by the program's unintended effect of raising the rent to others? What if its primary effect is merely to redistribute the cost of rent unequally rather than to reduce it overall. Is there an alternative? The authors of a recent 'Stanford paper' state, \"If society desires to provide social insurance against rent increases, it would be more desirable to offer this subsidy in the form of a government subsidy or tax credit.\"\n", "Rent control is a system where the government sets a price ceiling on rent (often in combination with eviction limitations and maintenance requirements). When soldiers returned from World War II and started families, which increased demand for apartments, but stopped receiving military pay, many of them could not deal with higher rents. The government put in price controls so that soldiers and their families could pay their rents and keep their homes. However, it increased the quantity demand for apartments and lowered the quantity supplied, and so the number of available apartments rapidly decreased until none were available for latecomers. Price ceilings create shortages when producers are allowed to abdicate market share or go unsubsidized.\n" ]
How does a computer graph a function?
It plots individual points. "Insane" is an exaggeration. Think about this, say you had a super HD 4K monitor and had the graph going across the entire screen. If the software were to individually compute every pixel it displays... it would only have to compute about 4000 points, one for every x value, which is not hard for a computer at all for most functions, certainly easier than making inferences about arbitrary functions (but not necessarily if the form of the function is known in advance).
[ "In the modern foundations of mathematics, and, typically, in set theory, a function is actually equal to its graph. However, it is often useful to see functions as mappings, which consist not only of the relation between input and output, but also which set is the domain, and which set is the codomain. For example, to say that a function is onto (surjective) or not the codomain should be taken into account. The graph of a function on its own doesn't determine the codomain. It is common to use both terms \"function\" and \"graph of a function\" since even if considered the same object, they indicate viewing it from a different perspective.\n", "The computer consists of a fixed alphabet of input symbols, and a mutable directed graph (aka a state diagram) with its arrows labelled by alphabet symbols. Each node of the graph has exactly one outgoing arrow labelled with each symbol, although some of these may loop back into the original node. One fixed node of the graph is identified as the start or \"active\" node.\n", "A computer is a machine that manipulates data according to a set of instructions called a computer program. The program has an executable form that the computer can use directly to execute the instructions. The same program in its human-readable source code form, enables a programmer to study and develop a sequence of steps known as an algorithm. Because the instructions can be carried out in different types of computers, a single set of source instructions converts to machine instructions according to the CPU type.\n", "BULLET::::- The graph \"G\" is the structure of the computer network. There is one computer for each node of \"G\" and one communication link for each edge of \"G\". Initially, each computer only knows about its immediate neighbors in the graph \"G\"; the computers must exchange messages with each other to discover more about the structure of \"G\". Each computer must produce its own color as output.\n", "In mathematics, the graph of a function is, formally, the set of all ordered pairs , such that is in the domain of the function . In the common case where and are real numbers, these pairs are Cartesian coordinates of points in the Euclidean plane and thus form a subset of this plane, which is a curve in the case of a continuous function. This graphical representation of the function is also called the \"graph of the function\".\n", "Graphs are commonly used to encode structural information in many fields, including computer vision and pattern recognition, and graph matching is an important tool in these areas. In these areas it is commonly assumed that the comparison is between the \"data graph\" and the \"model graph\".\n", "The machine can receive instructions which change the layout of the graph. The basic instructions are the new \"w instruction, which creates a new node which is the \"result\" of following the string \"w\", and the set \"w\" to \"v instruction which (re)directs an edge to a different node. Here \"w\" and \"v\" represent \"words\". \"v\" is a \"former\" word—i.e. a previously-created string of symbols—so that the redirected edge will point \"backwards\" to an old node that is the \"result\" of that string.\n" ]
Why did the Constitution specify March 4 (the date) for the start of the new president's term? Why did FDR specify January 20 (the date) as the new date in the 20th amendment?
To answer the first part of your question: The Constitution did **not** specify March 4, or any other date, as the beginning of the new President's term. It stated only that the length of the President's term was four years. And, while the Constitution gave Congress the power to set the date for the selection of Electors, and the date the Electors should cast their votes, it did *not* give Congress the power to set the date on which the President's term began. Congress met for the first time on March 4th 1789. This date was the [result of a vote of the Continental Congress](_URL_0_): > Resolved, That the first Wednesday in January next be the day for appointing electors in the several States, which before the said day shall have ratified the said Constitution; that the first Wednesday in February next be the day for the electors to assemble in their respective States and vote for a President; and that **the first Wednesday in March** next be the time, and the present seat of Congress [New York] the place for commencing, proceeding under the said Constitution." [EDIT: So, to answer OP's specific question, it looks as if they were fond of Wednesdays, and March 4th happened to be a Wednesday in 1789]. Although Congress didn't count the electoral votes of the first Presidential election until April 6th of that year, and President Washington was not sworn in until April 30th, his term in office was retroactively considered to have begun on March 4th (since that was when the new Constitution "commenced"). Since every Presidential term was four years long, as specified by the Constituion, every subsequent Presidential term (until the XX Amendment was enacted) also began on March 4th.
[ "Efforts to change these dates through a constitutional amendment began in the late 1920s. In March 1932, Congress approved a constitutional amendment moving the beginning and ending of the terms of the president and vice president from March 4 to January 20, and of members of Congress from March 4 to January 3. The amendment also specified procedures for cases in which the president-elect dies or otherwise fails to qualify. By January 23, 1933, the amendment had been ratified by the requisite number of states to become the Twentieth Amendment. Roosevelt's second inauguration in 1937 was the first presidential inauguration to take place on the new date.\n", "The Twentieth Amendment (1933) changes the date on which a new President, Vice President and Congress take office, thus shortening the time between Election Day and the beginning of Presidential, Vice Presidential and Congressional terms. Originally, the Constitution provided that the annual meeting was to be on the first Monday in December unless otherwise provided by law. This meant that, when a new Congress was elected in November, it did not come into office until the following March, with a \"lame duck\" Congress convening in the interim. By moving the beginning of the president's new term from March 4 to January 20 (and in the case of Congress, to January 3), proponents hoped to put an end to lame duck sessions, while allowing for a speedier transition for the new administration and legislators.\n", "BULLET::::- The United States Congress ratified the Twentieth Amendment to the United States Constitution, moving the presidential inauguration date up from March 4 to January 20 and eliminating lame-duck sessions of Congress.\n", "Section 1 of the Twentieth Amendment prescribes January 20, at noon, as the start-finish date for the four-year term of both the President and Vice President. Previously March 4, the new date shortened the period between election day in November and Inauguration Day by about six weeks, accelerating the pace of the transfer of presidential power from the out-going president to his successor. By changing the date on which presidential terms end and begin, Section 1 has superseded the Twelfth Amendment's reference to March 4 as the date by which the House of Representatives must—under circumstances where no candidate won an absolute majority of votes for president in the Electoral College—conduct a contingent presidential election. Section 1 also specifies January 3, at noon, as the start-finish date for the terms of members of the Senate and the House of Representatives; the previous date had also been March 4.\n", "The Constitution set the date for Congress to convene — Article 1, Section 4, Clause 2, originally set that date for the third day of December. The Twentieth Amendment, however, changed the opening date for sessions to noon on the third day of January, unless they shall by law appoint a different day. The Twentieth Amendment also states that Congress shall assemble at least once in every year and allows Congress to determine its convening and adjournment dates and other dates and schedules as it desires. Article 1, Section 3, provides that the president has the power to convene Congress on extraordinary occasions at his discretion.\n", "BULLET::::- February 27, 1951: Twenty-second Amendment to the United States Constitution, setting a term limit for election and overall time of service to the office of President of the United States, was ratified by the requisite number of states (then 36) to become part of the Constitution\n", "The Twentieth Amendment (Amendment XX) to the United States Constitution moved the beginning and ending of the terms of the president and vice president from March 4 to January 20, and of members of Congress from March 4 to January 3. It also has provisions that determine what is to be done when there is no president-elect. The Twentieth Amendment was adopted on January 23, 1933.\n" ]
what happened at the nevada democratic convention last night?
There are many videos of what is apparently misconduct in the voting process aimed at benefitting Hillary Clinton and suppressing the supporters of Bernie Sanders.
[ "The Nevada caucuses are an electoral event in which citizens of the U.S. state of Nevada meet in precinct caucuses to elect delegates to the corresponding county conventions. There are 17 counties in Nevada and so there are 17 conventions. The county conventions then select delegates to Nevada's State Convention, which then choose delegates for the presidential nominating conventions.\n", "The Nevada Democratic Party partnered with the U.S. Hispanic Chamber of Commerce and IMPACTO, 100 Black Men of America, and the College of Southern Nevada to hold the second Democratic presidential debate in Las Vegas. The debate was telecast live by MSNBC and held at the Cashman Center in Las Vegas on Tuesday, January 15, 2008 from 6:00 – 8:00 pm Pacific Standard Time.\n", "The state convention was held in May as the final stage of the delegate selection process. Supports of Senator Sanders were angered when Party officials declined to accept the credentials of close to 60 pro-Sanders delegates. Nevada Democratic Party Chairwoman, Roberta Lange, allegedly received numerous death threats and threats to the lives of her family and grandchildren; a criminal investigation has yet to confirm these claims or the identities of those allegedly involved. At the convention, Sanders supporters protested until the staff cancelled the event. The event was later criticized as being violent, although there is no evidence that violence occurred.\n", "The Nevada congressional elections of 2006 took place on November 7, 2006 when each of the state's three congressional districts elected a representative to the United States House of Representatives. Although President George W. Bush captured the state in both the 2000 and 2004 elections, he did so with a very slim margin (3.35% in 2000 and just 2.59% in 2004). Nevada was considered a battleground state due to the close victory margins.\n", "The 2014 United States House of Representatives elections in Nevada were held on Tuesday, November 4, 2014 to elect the four U.S. Representatives from the state of Nevada, one from each of the state's four congressional districts. The elections coincided with the elections of other federal and state offices, including a gubernatorial election.\n", "At the Nevada Democratic State Convention in May, Sanders delegates were outraged by changes to and interpretations of rules that resulted in denial of the credentials of almost 60 Sanders backers, with the result that Sanders, instead of edging Clinton out in delegates to the national convention, came in second. Angry Sanders backers shouted down keynote speaker Barbara Boxer, a Clinton supporter. It was widely reported that some shoving, and throwing of chairs and other objects, ensued before Nevada Democratic Party Chairwoman Roberta Lange ended the convention early, but no actual evidence of chair-throwing ever emerged. After the convention was adjourned, casino security guards and local police were called to remove Sanders supporters who refused to leave the casino ballroom. Lange received death threats to herself and her family online and by telephone after \"Sanders supporters posted Lange's home and business addresses, email and cell phone number online.\" Sanders spokesman Michael Briggs said, \"We do not condone violence or encourage violence or even threats of violence\", and denied that the campaign had a role \"in encouraging the activity that the party is complaining about.\"\n", "The 2012 Democratic National Convention was a gathering, held from September 4 to September 6, 2012, at the Time Warner Cable Arena in Charlotte, North Carolina, in which delegates of the Democratic Party chose the party's nominees for President and Vice President in the 2012 United States national election.\n" ]
what makes even "healthy" or "normal" people sad from time-to-time for no reason at all (it seems like)?
Every now and then I remember how pointless and insignificant everyone's lives are.
[ "Research has found that the onset of SAD typically occurs between the ages of 20–30 years, but most affected people do not seek medical help. This could be due to the stigma of mental health issues. Many are afraid to state they are suffering and would rather hide it. As a society, we should push forward towards greater acceptance and gain knowledge in order to solve these issues.\n", "SAD may cause significant negative effects within areas of social and emotional functioning, family life, and physical health of the disordered individual. The duration of this problem must persist for at least four weeks and must present itself before a child is eighteen years of age to be diagnosed as SAD in children, but can now be diagnosed in adults with a duration typically lasting six months in adults as specified by the DSM-5.\n", "Just how SAD affects a child's attendance and participation in school, their avoidance behaviors stay with them as they grow and enter adulthood. Recently, \"the effects of mental illness on workplace productivity have become a prominent concern on both the national and international fronts\". In general, mental illness is a common health problem among working adults, 20% to 30% of adults will suffer from at least one psychiatric disorder. Mental illness is linked to decreased productivity, and with individuals diagnosed with SAD their levels at which they function decreases dramatically resulting in partial work-days, increase in number of total absences, and \"holding back\" when it comes to carrying out and completing tasks.\n", "SAD shows a high degree of co-occurrence with other psychiatric disorders. In fact, a population-based study found that 66% of those with SAD had one or more additional mental health disorders. SAD often occurs alongside low self-esteem and most commonly clinical depression, perhaps due to a lack of personal relationships and long periods of isolation related to social avoidance. Clinical depression is 1.49 to 3.5 times more likely to occur in those with SAD. Anxiety disorders other than SAD are also very common in patients with SAD, in particular generalized anxiety disorder. Avoidant personality disorder is likewise highly correlated with SAD, with comorbidity rates ranging from 25% to 89%.\n", "One study looked at whether some people could be predisposed to SAD based on personality traits. Correlations between certain personality traits, higher levels of neuroticism, agreeableness, openness, and an avoidance-oriented coping style, appeared to be common in those with SAD.\n", "A wide range of research has linked sad or depressed moods with more extensive and accurate evaluation of problems. As a result of this, earlier studies hypothesized that people with more depressed moods would tend to use anchoring less than those with happier moods. However, more recent studies have shown the opposite effect: sad people are \"more\" likely to use anchoring than people with happy or neutral mood.\n", "As noted by Altman, McGoey & Sommer, it is important to observe the child, \"in multiple contexts, on numerous occasions, and in their everyday environments (home, daycare, preschool)\". It is beneficial to view parent and child interactions and behaviors that may contribute to SAD.\n" ]
How did showering to clean one's body become a thing?
William Feetham patented a chain-release shower in 1767. In the late 1800s communal showers took hold by French military, under the direction of physician François Merry Delabost who had first tried them out on prisoners for reasons of economics and hygiene. In modern times showers did not start to become common until the early 1920s, by which time homes had water heating and reliable plumbing, and had shower heads in existing tubs. But it was slow going at first. A 1954 article in Challenge magazine noted, "the plumbing industry confidently predicts that the day is not far off when a bathroom and bathtub (with shower) will become a necessary adjunct to every bedroom in the home." (Challenge Vol. 2, No. 6 (March 1954), pp. 36-38).
[ "Showering is mostly part of a daily routine primarily to promote cleanliness and prevent odor, disease and infection. Advances in science and medicine in the 19th century began to realize the benefit of regular bathing to an individual's health. As a result, most modern cultures encourage a daily personal hygiene regimen. Showering has also developed the reputation as a relaxing and generally therapeutic activity.\n", "Removal of soap and water from the clothing after washing was a separate process. First, soap would be rinsed out with clear water. After rinsing, the soaking wet clothing would be formed into a roll and twisted by hand to extract water. The entire process often occupied an entire day of hard work, plus drying and ironing.\n", "Hair washing is the cosmetic act of keeping hair clean by washing it. To remove sebum from hair, some apply a surfactant, usually shampoo (sometimes soap) to their hair and lather the surfactant with water. The surfactant is rinsed out with water along with the dirt that it bonds to.\n", "Laundry refers to the act of washing clothing and linens, the place where that washing is done, and/or that which needs to be, is being, or has been laundered. Various chemicals may be used to increase the solvent power of water, such as the compounds in soaproot or yucca-root used by Native American tribes. Soap, a compound made from lye (from wood-ash) and fat, is an ancient and very common laundry aid. Modern washing machines typically use powdered or liquid laundry detergent in place of more traditional soap. Once clean, the clothes have been wrung out — twisted to remove most of the water. Then they were hung up on poles or clotheslines to air dry, or sometimes just spread out on clean grass.\n", "Shower gel (also shower cream or body wash) is a specialized liquid product used for cleaning the body during showers. Not to be confused with liquid soaps, shower gels, in fact, do not contain saponified oil. Instead, it uses synthetic detergents derived from either petroleum or plant sources.\n", "Washing hair removes excess sweat and oil, as well as unwanted products from the hair and scalp. Often hair is washed as part of a shower or bathing with shampoo, a specialized surfactant. Shampoos work by applying water and shampoo to the hair. The shampoo breaks the surface tension of the water, allowing the hair to become soaked. This is known as the wetting action. The wetting action is caused by the head of the shampoo molecule attracting the water to the hair shaft. Conversely, the tail of the shampoo molecule is attracted to the grease, dirt and oil on the hair shaft. The physical action of shampooing makes the grease and dirt become an emulsion that is then rinsed away with the water. This is known as the emulsifying action. Sulfate free shampoos are less harming on color treated hair than normal shampoos that contain sulfates. Sulfates strip away natural oils as well as hair dye. Sulfates are also responsible for the foaming effect of shampoos.\n", "Bathing roughly follows ancient Roman bathing practices. It starts with relaxation in a room heated by a continuous flow of hot, dry air, allowing the bather to perspire freely. Bathers may then move to an even hotter room before they wash in cold water. After performing a full body wash and receiving a massage, bathers finally retire to the cooling-room for a period of relaxation.\n" ]
Could DNA fossilize?
Unfortunately probably not. A relatively recent study pegged the half life of DNA at around 500 years depending on the environmental surroundings. So every 500 years roughly half of the remaining bonds in the DNA molecule will be broken. After 2000 years, you would only expect 1/16 of the bonds to be remaining. And it's all downhill from there. Recently extinct animals could possibly have their DNA sequenced (and in fact the wooly mammoth has been mostly sequenced) but they would be much less likely to be fossilized. So we probably aren't getting DNA from fossils. Also, we don't use microscopes to read the DNA sequence. We use DNA sequencing, which I can explain in more detail if you're interested in that.
[ "Researchers in 2016 measured chloroplast DNA in marine sediment cores, and found diatom DNA dating back to 1.4 million years. This DNA had a half-life significantly longer than previous research, of up to 15,000 years. Kirkpatrick's team also found that DNA only decayed along a half-life rate until about 100 thousand years, at which point it followed a slower, power-law decay rate.\n", "In 1994, Woodward announced to have extracted and typed DNA from an 80-million-year-old Cretaceous dinosaur bone, but S. Blair Hedges and other ancient DNA experts demonstrated that Woodward had really sequenced human DNA.\n", "A critical review of ancient DNA literature through the development of the field highlights that few studies after about 2002 have succeeded in amplifying DNA from remains older than several hundred thousand years. A greater appreciation for the risks of environmental contamination and studies on the chemical stability of DNA have resulted in concerns being raised over previously reported results. The dinosaur DNA was later revealed to be human Y-chromosome, while the DNA reported from encapsulated halobacteria has been criticized based on its similarity to modern bacteria, which hints at contamination. A 2007 study also suggests that these bacterial DNA samples may not have survived from ancient times, but may instead be the product of long-term, low-level metabolic activity.\n", "The first fossil fragments were found in 1993 by David W. Krause of New York's Stony Brook University, but it took 14 years for scientists Susan E. Evans, Marc E. H. Jones, and Krause to assemble enough data for publication in the \"Proceedings of the National Academy of Sciences,\" the journal of the United States National Academy of Sciences.\n", "BULLET::::- Scientists report the results of the oldest human DNA found. The DNA is from a 400,000-year-old hominin femur bone fossil uncovered in Spain and matches the DNA of extinct human Denisovans that lived thousands of miles away in Siberia.\n", "Evidence for the extraction of short segments of ancient DNA from dinosaur fossils has been reported on two separate occasions. The extraction of protein, soft tissue, remnant cells and organelle-like structures from dinosaur fossils has been confirmed. Blood-derived porphyrin proteins have also been discovered in a mid Eocene mosquito fossil.\n", "The identity of the fossil remain can be uncovered by comparing its DNA sequence with those of known species using software such as BLASTN. This archaeogenetic approach is especially helpful when the morphology of the fossil is ambiguous. Apart from that, species identification can also be done by finding specific genetic markers in an aDNA sequence. For example, the American indigenous population is characterized by specific mitochondrial RFLPs and deletions defined by Wallace et al.\n" ]
Would a single candle in an otherwise unlit circus Hall of Mirrors provide the same lighting effect as an equivalent number of real candles (equivalent to the number of reflections) in a normal room?
Think of it this way. For every mirror there is an area NOT lit because light headed for that area was redirected by the mirror, at a loss because the mirror is not 100% efficient. That's where the seemingly "extra" light comes from.
[ "The illumination problem is a resolved mathematical problem attributed to Ernst Straus in the 1950s. Straus asked if a room with mirrored walls can always be illuminated by a single point light source, allowing for repeated reflection of light off the mirrored walls. Alternatively, the question can be stated as asking that if a billiard table can be constructed in any required shape, is there a shape possible such that there is a point where it is impossible to the billiard ball in a at another point, assuming the ball is point-like and continues infinitely rather than stopping due to friction.\n", "In both of these works the candlelit setting had a realist justification. Viewing sculpture by candlelight, when the contours showed well and there might even be an impression of movement from the flickering light, was a fashionable practice described by Goethe. In the orrery demonstration the shadows cast by the lamp representing the sun were an essential part of the display, used to demonstrate eclipses. But there seems no reason other than heightened drama to stage the air pump experiment in a room lit by a single candle, and in two later paintings of the subject by Charles-Amédée-Philippe van Loo the lighting is normal.\n", "Thus one foot-candle is equal to one lumen per square foot or approximately 10.764 lux. In practical applications, as when measuring room illumination, it is very difficult to measure illuminance more accurately than ±10%, and for many purposes it is quite sufficient to think of one foot-candle as about ten lux as is typically done in the lighting industry.\n", "In both of these works, the candlelit setting had a realist justification. Viewing sculpture by candlelight, when the contours showed well, and there might even be an impression of movement from the flickering light, was a fashionable practice described by Goethe. In the orrery demonstration the shadows cast by the lamp representing the Sun were an essential part of the display. But there seems no reason other than heightened drama to stage the air pump experiment in a room lit by a single candle, and in two later paintings of the subject by Charles-Amédée-Philippe van Loo the lighting is normal.\n", "He described a 'dark chamber' and did a number of trials of experiments with small pinholes and light passing through them. This experiment consisted of three candles in a row and seeing the effects on the wall after placing a cutout between the candles and the wall. \n", "Peep shows were further developed with translucent painting techniques, perforations and cut-out shapes that provided special effects when lit from behind by candles. Changing the light from the front to the back of the picture could change the scene from day to night, much like the dissolving views that would later become a popular type of magic lantern show.\n", "Techniques to add motion to painted glass slides for the magic lantern were described since circa 1700. These usually involved parts (for instance limbs) painted on one or more extra pieces of glass moved by hand or small mechanisms across a stationary slide which showed the rest of the picture. Popular subjects for mechanical slides included the sails of a windmill turning, a procession of figures, a drinking man lowering and raising his glass to his mouth, a head with moving eyes, a nose growing very long, rats jumping in the mouth of a sleeping man. A more complex 19th century rackwork slide showed the then known eight planets and their satellites orbiting around the sun. Two layers of painted waves on glass could create a convincing illusion of a calm sea turning into a very stormy sea tossing some boats about by increasing the speed of the manipulation of the different parts.\n" ]
the weekend
From a Euro-American perspective, the Sabbath has been around since Biblical times, so the idea of having one day per week to take a break is ancient. I believe that current 5-day work week started around the later Industrial revolution, when more people began paying attention to things like worker welfare (no more children playing around with heavy machinery), as well as starting to introduce a shorter workday (eventually ending in the 9-5 workday we have now) Hard to say what the sole effect of making a five week day was since it was a change accompanied by shorter workdays and better labor regulation. Wiki: _URL_0_
[ "The weekend is that period of the week set aside by custom or law for rest from labor. In many countries it is Saturday and Sunday and often includes Friday night. This five-day workweek arose in America when labor unions attempted to accommodate Jewish Sabbath, beginning at a New England cotton mill and also instituted by Henry Ford in 1926; it became standard in America by about 1940 and spread among English-speaking and European countries to become the international workweek. China adopted it in 1995 and Hong Kong by 2006. India and some other countries follow both the international workweek and a more traditional Saturday half-workday and Sunday weekend. While Indonesia and Lebanon have the international workweek, most Muslim countries count Friday as the weekend, alone or with Thursday (all or half) or Saturday. Some universities permit a three-day weekend from Friday to Sunday. The weekend in Israel, Nepal, and parts of Malaysia, is Friday (all or half) and Saturday. Only the one-day customary or legal weekends are usually called \"Sabbath\".\n", "The Weekenders is an American animated television series created by Doug Langdale. It centers on the weekend life of four seventh graders: Tino, Lor, Carver, and Tish. The series initially aired on ABC and UPN, but was later moved to Toon Disney.\n", "Weekend activities are many and varied. Saturday evening events include trips to dinner or the movies, on-campus movies, and dances, while on Sundays there are irregular shopping trips to town; trips to major ski areas, to Boston, and to concerts and sports events at Dartmouth; and outdoor activities such as apple-picking and hiking.\n", "\"The Weekend\" is a song characterized by a soft, slow-burning melody that runs throughout its four minutes and thirty-two seconds. Its sultry production draws from contemporary R&B and 1990s neo soul music genres. Built around a synth-line, the song is completed with finger-snaps, key thumps that resemble the sound of a ticking clock, hi-hats and a high-pitched vocal sample. Lyrically, \"The Weekend\" is about polyamory. SZA sings about sharing her romantic partner with other women; she finds herself in the perspective of a woman who only sees her partner at weekends while others have him during the week. Some online publications called the song's narrator a \"side chick\", but according to SZA, \"The Weekend\" is about sharing a man with two other women at the same time. She sings in the hook, \"My man is my man is your man / Heard it's her man too\". For her, this song is about feeling empowered in a situation in which the narrator's lover tries to play her. In interview with Vulture.com she said:\n", "Weekend is an American television newsmagazine program that aired on NBC from 1974 to 1979. It originally aired once monthly on Saturday nights from 11:30 p.m. to 1 a.m. Eastern time, the same time slot as Saturday repeats of \"The Tonight Show Starring Johnny Carson\" during its first season, then to replace \"Saturday Night Live\", once a month on those weekends when the \"SNL\" cast was not producing a show. The program was awarded a George Foster Peabody medal in 1975 and attracted a cult following.\n", "\"Weekender\" is a 1992 single by the band Flowered Up. The band had performed the song as early as 1991. The song has been described as denouncing people who only go to clubs on the weekend and advocating a party-all-the-time philosophy of the group. The group originally wanted it to be released through their current label London Records. The single was turned down by the label and released later in April 1992 by Heavenly Recordings.\n", "\"The Weekend\" is a song recorded by American singer SZA for her debut studio album, \"Ctrl\" (2017). Written by SZA and its producer ThankGod4Cody, the song samples \"Set the Mood (Prelude)\" from the 2006 album \"FutureSex/LoveSounds\", written by Justin Timberlake, Timbaland, and Danja, who also received writing credits for \"The Weekend\". A contemporary R&B and neo soul record, \"The Weekend\" uses a synth-line, hi-hats, drums, a high-pitched vocal sample and clocking key thumps. Its theme is polyamory; SZA sings about sharing a lover with other women from the perspective of one who only see her partner at weekends.\n" ]
Hitler glorified blonde hair and blue eyes, yet he himself didn't look stereotypically "Aryan". Did he consider himself and the other Austrians to be "lower quality Aryans" and the Scandinavians "higher quality Aryans"? I.e did he consider himself "pure"?
Hitler discussed this in Mein Kampf. He promoted the idea of five sub-races of the Aryan people. Dinaric, Alpine, mediterranean, Nordic, and Eastern Baltic. The best kind of Aryan is, you probably guessed it, are the predominantly blue eyed and fair headed Nordics. This was actually very popular, Nordicism I mean, way before Hitler promoted it. Anyway, Hitler said that Germans and other kinds of Aryans have either been diluted and weakened over time (mixing with Jewish people for example). He promoted blue eyed and blonde germans as models because they are less not Nordic. Essentially, Germans needed to expunge non-Nordic lineage which will cause them to have blue eyes and blonde hair again. The issue with Nordicism conflicted with Italy which promoted Mediterreneanism.
[ "The Nazis considered the purest Aryans to be those that belonged to the \"Nordic race\" physical ideal, known as the \"master race\" during Nazi Germany. Although the physical ideal of the Nazi racial theorists was typically the tall, fair-haired and light-eyed Nordic individual, such theorists accepted the fact that a considerable variety of hair and eye colour existed within the racial categories they recognised. For example, Adolf Hitler and many Nazi officials had dark hair and were still considered members of the Aryan race under Nazi racial doctrine, because the determination of an individual's racial type depended on a preponderance of many characteristics in an individual rather than on just one defining feature.\n", "\"When I indicated my disbelief in their racial theories, they said what other Nazis had said: 'But surely you, a perfect type of Aryan, could not be unsympathetic to our views'... I had the impression that they really do set unbelievable store by such physical characteristics as long heads and light hair.\"\n", "The feeling that Germans were the Aryan \"Herrenvolk\" (Aryan master race) was widely spread among the German public through Nazi propaganda and among Nazi officials throughout the ranks, in particular when Reichskommissariat Ukraine Erich Koch said:\n", "Although the physical ideal of these racial theorists was typically the tall, fair-haired and light-eyed Nordic individual, such theorists accepted the fact that a considerable variety of hair and eye colour existed within the racial categories they recognised. For example, Adolf Hitler and many Nazi officials had dark hair and were still considered members of the Aryan race under Nazi racial doctrine, because the determination of an individual's racial type depended on a preponderance of many characteristics in an individual rather than on just one defining feature.\n", "Hitler made references to an \"Aryan Race\" founding a superior type of humanity. The purest stock of Aryans according to Nazi ideology was the Nordic people of Germany, England, Denmark, The Netherlands, Sweden and Norway. The Nazis defined Nordics as being identified by tall stature (average 175 cm), long faces, prominent chins, narrow and straight noses with a low bridge, lean builds, doliocephalic skulls, straight light hair, light eyes, and fair skin. The Nazis claimed that Germanic people specifically represented a southern branch of the Aryan-Nordic population. The Nazis did not consider all Germans to be of the Nordic type (which predominated the north), and stated that Germany also had a large \"Alpine\" population (identified by, among other features, lower stature, stocky builds, flatter noses, and higher incidences of darker hair and eyes). Hitler and Nazi racial theorist Hans F. K. Günther framed this as an issue to be corrected through selective breeding for \"Nordic\" traits. Hitler Youth propaganda emphasized the \"Nordic\" nature of Germans, with the text issued to all Hitler Youth members stating: \"the principal ingredient of our people is the Nordic race (55%). That is not to say that half our people are pure Nordics. All of the aforementioned races appear in mixtures in all parts of our fatherland. The circumstance, however, that the great part of our people is of Nordic descent justifies us taking a Nordic standpoint when evaluating our character and spirit, bodily structure, and physical beauty.\"\n", "These and other ideas evolved into the Nazi use of the term \"Aryan race\" to refer to what they saw as being a superior race, which was narrowly defined by the Nazis as being identical with the Nordic race, followed by other sub-races of the Aryan race and excluding Slavs as non-Aryan. They worked to maintain the purity of this race through eugenics programs (including anti-miscegenation legislation, compulsory sterilization of the mentally ill and the mentally deficient, the execution of the institutionalized mentally ill as part of a euthanasia program).\n", "Gobineau later came to use and reserve the term Aryan only for the \"German race\" and described the Aryans as 'la race germanique'. By doing so, he presented a racist theory in which Aryans—that is Germans—were all that was positive.\n" ]
what's the purpose for the mid season finale pretty much all shows have now?
Lets everybody enjoy their holidays without watching TV and having to keep up while with family and gives more time to film and edit episodes
[ "The finale was written by co-creator/executive producer Damon Lindelof and executive producer Carlton Cuse, and directed by executive producer Jack Bender. Unlike the previous season finales, which were two hours long with advertisements, the series finale was expanded by half an hour, running two and a half hours starting at 9 pm ET, with a retrospective of the past six seasons running for two hours, starting at 7 pm.\n", "After the series' normal run began in January 2008, the first two seasons were aired nearly back-to-back, creating nearly a year-long delay in between the second and third seasons. The long-awaited final season finally premiered in North America on March 14, 2009, with a 90-minute (three episode) special. After a lack of communication and much speculation, it was officially announced at BotCon 2009 that the series was over, at least in a televised format.\n", "As broadcast of the fourth season finale approached, there was a flurry of news reports suggesting that the series was coming to an unexpected end, based upon televised promotions for the episode, leaked plot details, and wording of a CTV press release issued on March 6, 2007, that implied that the series finale would air on March 12, 2007. Two segments of production footage with time code circulated on YouTube also seemed to indicate a series finale as imminent despite the show's continued success in Canada and recent U.S. sale. On March 7, 2007, CTV clarified its press release, stating it was a season finale, and on March 13, 2007, CTV confirmed an order for a 19-episode fifth season, that premiered on September 24, 2007.\n", "The series was cancelled on May 14, 2010. However, the promo that aired on May 20, 2010 stated that this was the season finale. The finale was originally set to be two hours long, consisting of both this episode and \"Countdown\". After cancellation, they were aired separately. John Polson directed this episode, his third directing credit for the season. Timothy J. Lea and Scott M. Gimple wrote the episode. This is Lea's second writing credit for the show. He wrote the episode \"Queen Sacrifice\" with Byron Balasco.\n", "A season finale (British English: last in the series; Australian English: season final) is the final episode of a season of a television program. This is often the final episode to be produced for a few months or longer, and, as such, will try to attract viewers to continue watching when the series begins again.\n", "BULLET::::- The show was conceived as an eight-week contest, but due to lower-than-expected ratings, an announcement in Episode 3 declared that subsequent episodes would have double eliminations, reducing the total number of broadcast shows to six. The Finale was moved from Las Vegas, Nevada to Los Angeles.\n", "The show consists of 26 episodes which aired at prime time 9:30pm (local time) every Wednesdays. The season finale aired on 29 March 2017. Due to higher viewership demand and the popularity of the show ITN, officially announced their interest in renewing for the second season of the show.\n" ]
why are animals and plants so distinct, e.g why aren't there any plants that can walk or animals that do photosynthesis?
There are animals like a sponge that you would likely mistake for a plant if you didn't know better, and plants that can move and eat "meat" like a venus fly trap. I know that plants and animals are different in that plants have cell walls and animals have cell membranes, and given how far back on the tree of life we are related, those two things must be really different and important.
[ "Plants are often the dominant physical and structural component of habitats where they occur. Many of the Earth's biomes are named for the type of vegetation because plants are the dominant organisms in those biomes, such as grasslands, taiga and tropical rainforest.\n", "Plants, like all known organisms, use DNA to pass on their traits. Animal genetics often focuses on parentage and lineage, but this can sometimes be difficult in plant genetics due to the fact that plants can, unlike most animals, be self-fertile. Speciation can be easier in many plants due to unique genetic abilities, such as being well adapted to polyploidy. Plants are unique in that they are able to produce energy-dense carbohydrates via photosynthesis, a process which is achieved by use of Chloroplast|chloroplasts]]. Chloroplasts, like the superficially similar mitochondria, possess their own DNA. Chloroplasts thus provide an additional reservoir for genes and genetic diversity, and an extra layer of genetic complexity not found in animals.\n", "The study of plants and vegetation is complicated by their form. First, most plants are rooted in the soil, which makes it difficult to observe and measure nutrient uptake and species interactions. Second, plants often reproduce vegetatively, that is asexually, in a way that makes it difficult to distinguish individual plants. Indeed, the very concept of an individual is doubtful, since even a tree may be regarded as a large collection of linked meristems. Hence, plant ecology and animal ecology have different styles of approach to problems that involve processes like reproduction, dispersal and mutualism. Some plant ecologists have placed considerable emphasis upon trying to treat plant populations as if they were animal populations, focusing on population ecology. Many other ecologists believe that while it is useful to draw upon population ecology to solve certain scientific problems, plants demand that ecologists work with multiple perspectives, appropriate to the problem, the scale and the situation.\n", "Because the biology of plants differs with animals, their symptoms and responses are quite different. In some cases, a plant can simply shed infected leaves or flowers to prevent the spread of disease, in a process called abscission. Most animals do not have this option as a means of controlling disease. Plant diseases organisms themselves also differ from those causing disease in animals because plants cannot usually spread infection through casual physical contact. Plant pathogens tend to spread via spores or are carried by animal vectors.\n", "Unlike animals, many plant cells, particularly those of the parenchyma, do not terminally differentiate, remaining totipotent with the ability to give rise to a new individual plant. Exceptions include highly lignified cells, the sclerenchyma and xylem which are dead at maturity, and the phloem sieve tubes which lack nuclei. While plants use many of the same epigenetic mechanisms as animals, such as chromatin remodelling, an alternative hypothesis is that plants set their gene expression patterns using positional information from the environment and surrounding cells to determine their developmental fate.\n", "The study of plants is vital because they underpin almost all animal life on Earth by generating a large proportion of the oxygen and food that provide humans and other organisms with aerobic respiration with the chemical energy they need to exist. Plants, algae and cyanobacteria are the major groups of organisms that carry out photosynthesis, a process that uses the energy of sunlight to convert water and carbon dioxide into sugars that can be used both as a source of chemical energy and of organic molecules that are used in the structural components of cells. As a by-product of photosynthesis, plants release oxygen into the atmosphere, a gas that is required by nearly all living things to carry out cellular respiration. In addition, they are influential in the global carbon and water cycles and plant roots bind and stabilise soils, preventing soil erosion. Plants are crucial to the future of human society as they provide food, oxygen, medicine, and products for people, as well as creating and preserving soil.\n", "Plants exhibit natural variation in their form and structure. While all organisms vary from individual to individual, plants exhibit an additional type of variation. Within a single individual, parts are repeated which may differ in form and structure from other similar parts. This variation is most easily seen in the leaves of a plant, though other organs such as stems and flowers may show similar variation. There are three primary causes of this variation: positional effects, environmental effects, and juvenility.\n" ]
what would actually happen if we built a tunnel from one side of the earth to the other and then proceeded to drop something through it?
People that claim it would oscillate back and forth are wrong. It's a nice thought, but it's a misinterpretation of the laws of nature. That would happen if the gravity of earth was created by a small point at the centre of the earth, and that the object "falling" could pass through that point. First of all, lets take a look at the formula for gravitational force: F = G*M1*M2/r^2 G is the gravitational constant, we don't need to worry about that for this example. M1 an M2 are the masses attracted to each other. r^2 is the interesting thing here. The r itself is the distance between the two bodies, but the ^2 means that the relationship is squared. I.e. if the distance doubles, the force is only a fourth. Now, to simplify things, lets just consider that the object is in a cavity in the exact centre of the earth, lets also assume that the earth is a perfect sphere with perfectly equal density. Since the object is inside what causes the gravity, we can't really treat earth as just one object, we have to think of it as very many objects stuck next to each other all around the object (I.e. particles), all have an equal amount of mass (and therefore equal gravitational pull). So, there are forces trying to pull the object in every direction. As long as the object is perfectly centered, the net force acting on the object will be zero. But if we placed the object slightly off-zero, the formula for gravitational force tells us that the "pull" from the particles that make up earth won't be even, the ones that are closer will exert a slightly larger force than the more distant ones, so the sum of the forces would not be zero. Newton taught us that an object will remain in its current state until acted on by a force. Well, since we now have a net force that is non-zero, the object will start to move towards the closer one of the particles acting upon it. The closer it get, the more pull it will feel from the closer particles, and the less pull it will feel from the more distant particles. Many people like to think that a stationary object at the centre of the earth would be ripped apart, but this is not correct. Since gravity act on all particles with mass, ALL of the objects particles will be acted upon by the gravitational forces. I.e. all parts of the object is being "pulled" in all directions. But what about the r^2 from that gravitational force formula?! Yes, the particles in the "northern" part of the object will get a slightly larger pull to the north compared to particles in the south part of the object. This is a variant of what is called "tidal forces". Another example of tidal forces is the fact that your head feel slightly less gravity than your feet. However, the forces are far two weak to overcome the forces holding particles together. So if you happen to fall into a bottomless pit, at least you don't have to worry about being ripped apart :/ So, trying to get an object stationary at the centre of the earth would be like trying to get a steel ball centered between two magnets (magnets also have this r^2 thing), virtually impossible. Another way to imagine gravity being a round bowl, with a pin in the centre representing earth (or any other object large enough to have a significant gravitational field). Put a ball in the bowl, and it will go to the centre and hit the pin = falling towards earth and eventually hitting is. Now, for the "being in a cavity inside the large object", flip the bowl upside down, letting where the bowl meets the table around the perimeter represent the walls of said cavity. Try to balance the ball on top of the bowl. It will race to either side, hitting the table (the walls of the cavity). Now back to the actual question: From what I wrote above, we can draw the conclusion that the object dropped would start off by falling down, since most of the gravitational forces acting upon it are "coming from" lower than where you are holding the object before you drop it. But after a short while, when the object has passed into the earth a bit, you will have gravitational forces from the side as well, and here the above reasoning comes into play. Since the object can't reasonably be exactly centered in the hole, it will get a slightly larger "pull" off towards one side of the wall. And subsequently, it will end up sliding down against that wall until the friction overcomes the gravitational force pulling it down (remember, the net sum of the gravitational forces lessen as the object get closer to the centre of the earth), and there it will stop. It will never fully reach half way through.
[ "Because the tunnel was not straight, it was not possible to see if someone had entered the tunnel from the other end. To overcome this, a byelaw was introduced which stated that whoever reached the centre first should continue, whilst the other boat would have to turn back.\n", "The tunnellers developed counter tactics, which both sides deployed. The first was the use of large mines placed in one's own tunnels – some actually dug towards enemy noise to create damage – which when exploded would create fissures and cracks in the ground, making the ground either unsuitable for tunnelling or destroying existing tunnels and works. A small device, called the camouflet, created a localised underground chamber designed not to break the surface and form craters, but to destroy a strictly limited area of underground territory – and its occupants. The second tactic, deployed when the enemy tunnel was too close to your existing works or trenches, was the deployment of rod-fed torpedo shaped camouflet charges. Effectively land mines on the end of long iron sticks, the technique was a defensive tactic against an immediate threat. Towards the end of the tunnel war, forces also deployed mines at greater depths, which, coupled with the use of listening devices, could be exploded away from friendly trenches as a defensive measure.\n", "The first pass on the tunnel shaft was not to excavate down to the full depth of the completed tunnel. Rather, an additional of earth was to be removed before the sealed roadway could be laid through the tunnel.\n", "Post-war tunnelling took place in less urgent circumstances and new, less damaging, tunnelling methods were used. Explosives were employed again but this time in smaller quantities, placed in drill holes bored into the face of the excavation. They were fired electrically in a sequence which began in the centre of the face and spread outwards, so that the centre would create a void into which the peripheral rock could fall. The downside of this method was that it created tunnels with jagged sides, as it fractured the limestone around the periphery of the excavation.\n", "On 24 February 1905, the two halves of the tunnel came together. They were out of alignment by only horizontally and vertically. Construction time was 7½ years, rather than 5½ years, due to problems such as water inflows and strikes.\n", "This diagram also casts doubt on the unsupported assertions which are sometimes made that the gap between the two tunnels is the result of a roof collapse in the early days of the tunnel. This gap coincides precisely with the level section at the summit of the line, and also with a dip in the contours of the ground above which brings the ground level below the depth at which the transition from tunnel to cutting is made at the outer ends of the tunnels. It is unlikely that a chance collapse would have taken place to correspond with these features with such convenient precision. The gap is also shown to be in the more stable oolitic strata rather than the unstable stretches of fuller's earth which are more liable to collapse.\n", "The tunnel is made up of separate elements, each prefabricated in a manageable length, then having the ends sealed with bulkheads so they can be floated. At the same time, the corresponding parts of the path of the tunnel are prepared, with a trench on the bottom of the channel being dredged and graded to fine tolerances to support the elements. The next stage is to place the elements into place, each towed to the final location, in most cases requiring some assistance to remain buoyant. Once in position, additional weight is used to sink the element into the final location, this being a critical stage to ensure each piece is aligned correctly. After being put into place, the joint between the new element and the tunnel is emptied of water then made water tight, this process continuing sequentially along the tunnel.\n" ]
what is the election everyone in america is talking about and what could it change in the american political system (i'm not american)
Every two years, the entire House of Representatives and 1/3 of the Senate are up for election. This gives the possibility to flip the majority party in both chambers of the federal legislature, making it more difficult to pass legislation preferred by the Republican party. (But not enough to give a veto-proof Democratic majority in both chambers). [This is a drastic oversimplification making the assumption a lot of proposed legislation is sharpy decided along party lines] In addition, as usual, many state/local elections are held simultaneously
[ "America Votes is a 501(c)4 organization that aims \"to coordinate and promote progressive issues.\" America Votes leads national and state-based coalitions to advance progressive policies and increase voter turnout for Democratic Party candidates.\n", "Americans Elect was a political organization in the United States known primarily for its efforts to stage a national online primary for the 2012 US Presidential Election. Although it was successful in obtaining signatures to get on the ballot in a majority of states, the process set up by the organization did not select a candidate.\n", "Americans Elect, a coalition of American centrists funded by wealthy donors such as business magnate Michael Bloomberg, former junk-bond trader Peter Ackerman and hedge fund manager John H. Burbank III, launched an effort in mid-2011 to create a national \"virtual primary\" that would challenge the current two-party system. The group aims to nominate a presidential ticket of centrists with names that would be on ballots in all 50 states. The group banks on broad cultural dissatisfaction with the partisan gridlock in Washington, D.C. \"The Christian Science Monitor\" has stated that \"the political climate couldn't be riper for a serious third-party alternative\" such as their effort, but the \"hurdles Americans Elect faces are daunting\" to get on ballots.\n", "Americans Elect was formed by many of the individuals who were responsible for a previous attempt to nominate an Internet candidate, Unity08, and had substantially identical goals for the 2012 presidential election cycle. Americans Elect's founder and Chairman was financier Peter Ackerman. Kahlil Byrd was the former CEO; he subsequently become the president of StudentsFirst by January 2013. Other members of the Board of Directors included Eliot Cutler, Dennis Blair, Stephen W. Bosworth, Irvine Hockaday, and Christine Todd Whitman and Joshua S. Levine.\n", "At election time it is just political suicide to try to defend the United States... I think on the whole people in the other American Republics understand and support us, but it isn't good politics to say so at election time. We are a sort of punching bag during elections. Everybody likes to take a swing at us, and makes sure he does every time you say something.\n", "The United States is unusual in that dozens of different offices are filled by election, from drain commissioner to the President of the United States. Elections happen every year on many different dates in many different areas of the country.\n", "On other occasions, in other years, this country has elected Republican Presidents and Democratic Presidents. They do it when they make a decision that that party and that candidate will serve a great national purpose. \"In my judgment and the responsibility ultimately is yours, in my judgment the United States will be best served by a candidate and a party who recognizes the basic issues of our time, and that is that this country has to go back to work again.\"\n" ]
why is the nanking massacre so controversial among the chinese and japanese? which is correct?
considering there are living witnesses to some of the atrocities, it's hard to deny atrocities happened. the Japanese story says there was no high level orders. and whatever stories of individual soldiers committing actions must have been fabrications because honorable soldiers always follow orders. just like flat earthers, no amount of evidence will ever convince them that their opinion is wrong. and once you're in deep, you're committed to go all the way.
[ "Nanking Massacre denial is the denial that Imperial Japanese forces murdered hundreds of thousands of Chinese soldiers and civilians in the city of Nanjing during the Second Sino-Japanese War, a highly controversial episode in Sino-Japanese relations. Some historians accept the findings of the Tokyo tribunal with respect to the scope and nature of the atrocities committed by the Imperial Japanese Army after the Battle of Nanking, others do not. In Japan, however, there has been a debate over the extent and nature of the massacre. Relations between Japan and China have been complicated as a result, as denial of the massacre is seen in China as part of an overall unwillingness on Japan's part to admit and apologize for its aggression, or a perceived insensitivity regarding the killings. Estimates of the death toll vary widely, ranging from 40,000 to 200,000. Some scholars, notably the revisionists in Japan, have contended that the actual death toll is far lower, or even that the event was entirely fabricated and never occurred at all. These revisionist accounts of the killings have become a staple of Japanese nationalist discourse.\n", "During the Nanking massacre which was committed during the early months of the Second Sino-Japanese War, the Japanese committed mass killings against the Chinese. Bradley Campbell described the Nanking Massacre as a genocide, because the Chinese were unilaterally killed by the Japanese en masse during the aftermath of the battle for the city, despite its successful and certain outcome.\n", " The official stance of the People's Republic of China is that 300,000 or more Chinese were massacred in Nanking. Initially, this figure was generally accepted as including both massacre victims and Chinese soldiers killed in combat, though during the 1980s it came to be interpreted as including only massacre victims.\n", "The PRC and Japan continue to debate over the actual number of people killed in the Rape of Nanking. The PRC claims that at least 300,000 civilians were murdered while Japan claims a far less figure of 40,000-200,000. While a majority of Japanese believe in the existence of the massacre, a Japanese-produced documentary film released just prior to the 60th anniversary of the massacre, titled \"The Truth about Nanjing\", denies that any such atrocities took place. These disputes have stirred up enmity against Japan from the global Chinese community, including Taiwan.\n", "Massacre denialists such as Higashinakano argue that the \"Nanking Massacre\" was a fabrication and war-time propaganda spread by the Chinese Nationalists and Communists. He argues that the activities of the Japanese military in Nanking were in accordance with international law and were humane. Among other claims, he has denied that there was execution of POWs in uniform, and cited anecdotes claiming that Chinese POWs were treated humanely by Japanese soldiers. However, Higashinakano has also claimed at times that the executed POWs were illegitimate combatants, and so their execution was legitimate under international law. Higashinakano believes some several thousand 'illegitimate combatants' may have been executed in such a fashion.\n", "The first academic accounts of the Nanking Massacre included as massacre victims all Chinese who were killed by the Japanese Army in and around Nanking, including Chinese soldiers who were killed in action. This definition was supported by Hora and other early scholars. In 1986 Ikuhiko Hata became the first historian to call this definition into question. Hata argued that Chinese troops killed on the battlefield were part of the Battle of Nanking rather than Nanking Massacre, and that only civilians and disarmed POWs should be counted as massacre victims.\n", "On June 19, 2007, a group of around 100 Liberal Democratic Party (LDP) lawmakers again denounced the Nanjing Massacre as a fabrication, arguing that there was no evidence to prove the allegations of mass killings by Japanese soldiers. They accused Beijing of using the alleged incident as a \"political advertisement\".\n" ]
why auto insurance companies allowed to discriminate?
It's not a denial of service or something like preferential treatment for a certain race, gender, etc. Actuarial science is just that: a science. Insurance is a business, and the different variables that determine how much someone pays for their insurance are based on past and present statistics of behavior. The price isn't set for me just because I'm a non-married white male with no dependents and so on, it's because all of those factors statistically show that I am a higher risk for an insurance claim. There is chemistry in the human brain involved as well that helps explain why the 18-25 partition has an upper bound of 25. There are subgroups within that partition as well. If there was a flat rate insurance cost for everyone who owned a car, regardless of age, gender, driving history, etc, there would be a massive outcry from the 'safer' drivers who then pay more than their share for the claims of the young and old.
[ "Proponents of no-fault insurance argue that automobile collisions are inevitable and that at-fault drivers are not necessarily higher risk and should not necessarily be punished; moreover, they note that the presence of liability insurance insulates reckless or negligent drivers from financial disincentives of litigation; also, uninsured motorists are often \"judgment proof\" (i.e., can't and won't end up paying for their liability anyway), so that in regions with high numbers of such uninsured motorists, no-fault systems may make more sense. Furthermore, traditional insurance is regressive because drivers of inexpensive cars are liable for damage to any car, no matter its value, even though they only add a small amount of liability to the pool with their less valuable cars. This issue is fixed under a no-fault regime.\n", "Individual auto insurance policies do not cover commercial activities, which may result in denials of claims if drivers are working for hire. To prevent legal complications, some ride service providers are requiring their drivers to purchase commercial insurance. Legislation for micro job worker issues remains unclear and unresolved.\n", "It is illegal for California insurers to refuse to provide car insurance to properly licensed drivers solely because they have a disability. It is also illegal for them to refuse to provide car insurance \"on the basis that the owner of the motor vehicle to be insured is blind,\" but they are allowed to exclude coverage for injuries and damages incurred while a blind unlicensed owner is actually operating the vehicle (the law is apparently structured to allow blind people to buy and insure cars which their friends, family, and caretakers can drive for them).\n", "The Insurance Information and Enforcement System is a system used, in the United States, by many Department of Motor Vehicles agencies to track people who might be driving without automobile insurance. Since many jurisdictions forbid uninsured driving, a system like this is necessary to keep track of any applications and cancellations of policies. The system was created largely because many people try to trick the DMV into thinking they're keeping their car insured by registering a car with a policy and then cancelling the policy soon after to keep the plates.\n", "Vehicle insurance, in the United States and elsewhere, is designed to cover risk of financial liability or the loss of a motor vehicle the owner may face if their vehicle is involved in a collision resulting in property or physical damages. Most states require a motor vehicle owner to carry some minimum level of liability insurance. States that do not require the vehicle owner to carry car insurance include Virginia, where an uninsured motor vehicle fee may be paid to the state; New Hampshire, and Mississippi which offers vehicle owners the option to post cash bonds (see below). The privileges and immunities clause of Article IV of the U.S. Constitution protects the rights of citizens in each respective state when traveling to another. A motor vehicle owner typically pays insurers a monthly fee, often called an insurance premium. The insurance premium a motor vehicle owner pays is usually determined by a variety of factors including the type of covered vehicle, the age and gender of any covered drivers, their driving history, and the location where the vehicle is primarily driven and stored. Credit scores are also taken into consideration. Most insurance companies offer premium discounts based on these factors.\n", "Automotive insurance consumers and other examples: The US states of New Jersey and Pennsylvania inadvertently ran a real-life experiment providing evidence of status quo bias in the early 1990s. As part of tort law reform programs, citizens were offered two options for their automotive insurance: an expensive option giving them full right to sue and a less expensive option with restricted rights to sue. In New Jersey the cheaper option was the default and most citizens selected it. Only a minority chose the cheaper option in Pennsylvania, where the more expensive option was the default.\n", "Some drivers opt to buy the insurance as a means of protection against costly breakdowns unrelated to an accident. In contrast to more standard and basic coverages such as comprehensive and collision insurance, auto repair insurance does not cover a vehicle when it is damaged in a collision, during a natural disaster or at the hands of vandals.\n" ]
Why was the 5.56mm round chosen as the NATO standard?
in 1977 NATO agreed to adopt a 2nd round in addition to the 7.62x51mm round, specifically the SS109 steel tipped round which was designed to pierce a soviet style steel helmet at 600 meters. Jane's Infantry Weapons 1986–1987, pg. 362 The Small Arms Review vol.10, no.2 November 2006. It's 4am and I haven't looked into the details of the agreement but I'm assuming it's related to the US introducing the M16 and 5.56mm round in 1960.
[ "Therefore, in March 1970, the U.S. recommended that all NATO forces adopt the 5.56×45mm cartridge. This shift represented a change in the philosophy of the military's long-held position about caliber size. By the middle of the 1970s, other armies were looking at assault rifle type weapons. A NATO standardization effort soon started and tests of various rounds were carried out starting in 1977. The U.S. offered the 5.56×45mm M193 round, but there were concerns about its penetration in the face of the wider introduction of body armor. In the end, the Belgian 5.56×45mm SS109 round was chosen (STANAG 4172) in October 1980. The SS109 round was based on the U.S. cartridge but included a new stronger, heavier, 62 grain bullet design, with better long range performance and improved penetration (specifically, to consistently penetrate the side of a steel helmet at 600 meters).\n", "When 5.56×45mm NATO was adopted as standard in 1980, NATO chose a 178 mm (1-in-7\") rifling twist rate for the 5.56×45mm NATO chambering to adequately stabilize the relatively long NATO L110/M856 5.56×45mm NATO tracer projectile. The US at that time converted all rifles in inventory by replacing the barrels and all new US military rifles since have been manufactured with this ratio.\n", "By the 1960s, after becoming involved in War in Vietnam, the US did an abrupt about-face and decided to standardize on the intermediate 5.56×45mm round (based on the .223 Remington varmint cartridge) fired from the new, lightweight M16 rifle, leaving NATO to hurry and catch up. Many of the NATO countries couldn't afford to re-equip so soon after the recent 7.62mm standardization, leaving them armed with full-power 7.62mm battle rifles for some decades afterwards, although by this point, the 5.56mm has been adopted by almost all NATO countries and many non-NATO nations as well. This 5.56mm NATO round was even lighter and smaller than the Soviet 7.62×39mm AK-47 cartridge, but possessed higher velocity. In U.S. service, the M16 assault rifle replaced the M14 as the standard infantry weapon, although the M14 continued to be used by designated marksmen. Although at 20\", the barrel of the M16 was shorter than that of the M14, it was still designated a \"rifle\" rather than a \"carbine\", and it was still longer than the AK, which used a 16\" barrel. (The SKS – an interim, semi-automatic, weapon adopted a few years before the AK-47 was put into service – was designated a carbine, even though it's 20\" barrel was significantly longer than the AK series' 16.3\". This is because of the Kalashnikov's revolutionary nature, which altered the old paradigm. Compared to previous rifles, particularly the Soviets' initial attempts at semi-automatic rifles, such as the 24\" SVT-40, the SKS was significantly shorter. The Kalashnikov altered traditional notions and ushered in a change in what was considered a \"rifle\" in military circles.)\n", "In March 1970, the U.S. recommended that all NATO forces adopt the 5.56×45mm cartridge. This shift represented a change in the philosophy of the military's long-held position about caliber size. By the mid 1970s, other armies were looking at M16-style weapons. A NATO standardization effort soon started and tests of various rounds were carried out starting in 1977. The U.S. offered the 5.56×45mm M193 round, but there were concerns about its penetration in the face of the wider introduction of body armor. In the end the Belgian 5.56×45mm SS109 round was chosen (STANAG 4172) in October 1980. The SS109 round was based on the U.S. cartridge but included a new stronger, heavier, 62 grain bullet design, with better long range performance and improved penetration (specifically, to consistently penetrate the side of a steel helmet at 600 meters). Due to its design and lower muzzle velocity (about 3110 ft/s) the Belgian SS109 round is considered more humane because it is less likely to fragment than the U.S. M193 round. The NATO 5.56×45mm standard ammunition produced for U.S. forces is designated M855.\n", "In March 1970, the U.S. recommended that all NATO forces adopt the 5.56×45mm cartridge. This shift represented a change in the philosophy of the military's long-held position about caliber size. By the mid 1970s, other armies were looking at M16-style weapons. A NATO standardization effort soon started and tests of various rounds were carried out starting in 1977. The U.S. offered the 5.56×45mm M193 round, but there were concerns about its penetration in the face of the wider introduction of body armor. In the end the Belgian 5.56×45mm SS109 round was chosen (STANAG 4172) in October 1980. The SS109 round was based on the U.S. cartridge but included a new stronger, heavier, 62 grain bullet design, with better long range performance and improved penetration (specifically, to consistently penetrate the side of a steel helmet at 600 meters). Due to its design and lower muzzle velocity (about 3110 ft/s) the Belgian SS109 round is considered more humane because it is less likely to fragment than the U.S. M193 round. The NATO 5.56×45mm standard ammunition produced for U.S. forces is designated M855.\n", "In March 1970, the U.S. recommended that all NATO forces adopt the 5.56×45mm cartridge. This shift represented a change in the philosophy of the military's long-held position about caliber size. By the middle of the 1970s, other armies were looking at assault rifle type weapons. A NATO standardization effort soon started and tests of various rounds were carried out starting in 1977. The U.S. offered the 5.56×45mm M193 round, but there were concerns about its penetration in the face of the wider introduction of body armor. In the end the Belgian 5.56×45mm SS109 round was chosen (STANAG 4172) in October 1980. The SS109 round was based on the U.S. cartridge but included a new stronger, heavier, 62 grain bullet design, with better long range performance and improved penetration (specifically, to consistently penetrate the side of a steel helmet at 600 meters).\n", "The 5.56×45mm NATO (official NATO nomenclature 5.56 NATO) is a rimless bottlenecked intermediate cartridge family developed in the late 1970s in Belgium by FN Herstal. It consists of the SS109, SS110, and SS111 cartridges. On 28 October 1980 under STANAG 4172 it was standardized as the second standard service rifle cartridge for NATO forces as well as many non-NATO countries. The 5.56×45mm NATO cartridge family was derived from, but is not identical to, the .223 Remington cartridge designed by Remington Arms in the early 1960s.\n" ]
why is the death of one lion such a huge story but the extinction of rhinos in the wild barely makes the news?
Because people want something to be upset about and this is the newest thing. Two weeks ago, no one ever even knew about this goddamn lion. The news said we should be mad, so everyone got pissed. Outrage gives people a feeling of purpose.
[ "The zoo witnessed a series of animal deaths in 2004 and 2005. In August 2004, a Lion-tailed macaque was found mysteriously dead. An emu and a tiger were also reported to have died mysteriously. On 4 September 2004, an elephant died, reportedly of acute hemorrhagic enteritis and respiratory distress. It was reported that the illness in elephants was due to poisoning. As a safety measure, the zoo authority suspended several staff members who were allegedly responsible for the \"gruesome killings\". Laboratory tests later confirmed that the two elephants, named Ganesha and Roopa, had been poisoned. This was followed by another elephant death (Komala) on 7 September despite heightened security. Komala had been scheduled to be transferred to Armenia in about a month.\n", "Rhinos, annihilated in Vietnam in 2010, are also threatened with extinction as a result of wildlife trade: in 2007, 13 were killed for their horns. By 2014, the number had ballooned; 1215 rhinos were poached and killed in South Africa in just one year.\n", "The killing resulted in international media attention, caused outrage among animal conservationists, criticism by politicians and celebrities and a strong negative response against Palmer. Five months after the killing of Cecil, the U.S. Fish and Wildlife Service added lions in India and West and Central Africa to the endangered species list, making it more difficult for United States citizens to legally kill lions. According to Wayne Pacelle, then President of the Humane Society, Cecil had \"changed the atmospherics on the issue of trophy hunting around the world,\" adding \"I think it gave less wiggle room to regulators.\"\n", "The Asiatic lion currently exists as a single subpopulation, and is thus vulnerable to extinction from unpredictable events, such as an epidemic or large forest fire. There are indications of poaching incidents in recent years. There are reports that organized gangs have switched attention from tigers to these lions. There have also been a number of drowning incidents after lions fell into wells.\n", "Although Patterson claimed the lions were responsible for up to 135 deaths, a peer-reviewed paper on man-eating lions and the circumstances surrounding this notorious event states that only about 28–31 killings can be verified (Kerbis Peterhans & Gnoske, 2001). (This figure does not take into account any people who may have been killed but not eaten by the animals.)\n", "Their past extinction was due to tigers—precisely, the Balinese tiger—and humans hunting them for their antlers and pelts. Their main predators now are humans, leopards, dholes (the Asiatic wild dog), pythons, and crocodiles.\n", "Poaching of birds and other mammals is another serious issue. A high number of elephant deaths have been reported from this park, with nearly 100 elephants dying between 1991–92 and 2004-05 in the Kodagu and Hunsur Forest Division (PA Update 2005). Elephants are killed for their ivory. A study carried out by Wildlife First! found that nearly 77 elephants were reported dead between 1 January 2000 and 31 October 2002. Another study carried out by the Institute for Natural Resources, Conservation, Education, Research and Training (INCERT) in 2002 revealed that as many as seven elephants had been killed earlier that year.\n" ]
Looking for some career guidance. (post-undergrad)
Your question is certainly welcome here but you might want to try posting it to /r/AskAcademia too – they're good with career advice.
[ "The Career Days is a project organized by the international organization called AIESEC. Its main aim is to inform students about the actual offers on the labor market. Students are encouraged to come into direct contact with potential employers of various companies and exchange information with them. The project consists of two parts: job and internship fair and The Academy of Skills. \n", "My Career is a national bi-annual comprehensive magazine for Canadian university and college students. It discusses life choices after graduation, such as career development, post-graduate education and working/travelling abroad (see work abroad) in addition to articles related to campus life, healthy living, student finances and maintaining a work-life balance.\n", "The Career Development Center motivates students and graduates to self-plan and structure their career goals, helps them to adapt to the contemporary labor market, and ensures full professional career realization. The main purpose is to assist graduates in finding employment and developing careers after graduation, as well as connecting employers with potential employees.\n", "The Career Center was established in 1989 and has provided students as well as alumni with personal and career development counseling and advice. The Center maintains links to a wide range of local and regional public sector organizations and private corporations. Every year the Career Center invites distinguished professionals from various fields to talk to students helping them broaden their scope and understanding of the job market as well as refine their own professional choices. European University Cyprus has adopted and developed several specialized tools to assist its students including the Employability Database and the Ariadne Psychometric Tool and is an active member of the International Association for the Exchange of Students for Technical Experience IAESTE.\n", "My Career Info is a not-for-profit career site developed and run by the Council of Ontario Universities. The site is designed to help students, graduates, and entry-level workers access campus career services, build a strong portfolio, gain budgeting skills, and find a job that fits with their education, skills and interests. They update the site regularly with the latest news from the job sector, including new job apps, resume and interview tips, and career advice. It is designed to help students incorporate career planning directly into their degree.\n", "The career center offers classes related to specific fields. These classes, usually about 1.5 hours (two periods) long, are designed to help students gain a better understanding in that specific field, and better prepares them for it. They are taught by professionals in that specific industry. They include:\n", "For graduate students pursuing academic careers, IHS sponsors an annual research colloquium, policy research seminars and invitation-only Career Development Seminars designed to help students \"land a job in academia, gain tenure, and contribute to the academic and intellectual conversation.\"\n" ]
how come i can see a vein bulging out of my left bicep, but not my right, even though i work out each arm equally?
Your body is not an anatomical mirror. Your left side does not mirror your rigt side. Same as your left index finger is not identical to your right index finger. Thus your veins runs 'differently' in your body, meaning that some are close to the skin and some are not. Another contributing factor might also be that you havent always exercised like now, and from childhood may have had a prefered arm (and leg) you used more than the other, leading to this arm being repetitively used more throughout life. Nb! I am not a native english speaker.
[ "\"The other runs upward by the right veins in the lungs and divides into branches for the heart and the right arm. The remaining part of it rises across the clavicle to the right side of the neck, and is superficial so as to be seen; near the ear it is concealed, and there it divides; its thickest, largest, and most hollow part ends in the brain; another small vein goes to the right ear, another to the right eye, and another to the nostril. Such are the distributions of the hepatic vein.\"\n", "The posterior intercostal veins are veins that drain the intercostal spaces posteriorly. They run with their corresponding posterior intercostal artery on the underside of the rib, the vein superior to the artery. Each vein also gives off a dorsal branch that drains blood from the muscles of the back.\n", "The ascending lumbar vein is a paired structure (i.e. one each for the right and left sides of the body). It starts at the lateral sacral veins, and it runs superiorly, intersecting with the lumbar veins as it crosses them.\n", "A peripherally inserted central catheter, or PICC line (pronounced \"pick\"), is a central venous catheter inserted into a vein in the arm (via the basilic or cephalic veins) rather than a vein in the neck or chest. The tip is positioned in the superior vena cava.\n", "It then turns backward and passes from left to right behind the omental bursa and drains into the portal vein. Thus, it acts as collaterals between the portal veins and the systemic venous system of the lower esophagus (azygous vein).\n", "On the left side it occasionally gives passage to the vertebral artery; more frequently the vertebral vein traverses it on both sides; but the usual arrangement is for both artery and vein to pass in front of the transverse process, and not through the foramen.\n", "The right marginal vein is a small vein that drains blood from the heart. It passes along the inferior margin of the heart and joins the small cardiac vein (sometimes known as the right coronary vein) in the coronary sulcus, or opens directly into the right atrium.\n" ]
milk expiration dates
If you say that it's literally same exact milk (same brand, same type, same size, etc) then its probably different stocks. Lets say Whole Foods bought milk 2 weeks ago and Safeway bought theirs 2 days ago. So WF's milk is older, and thus expires sooner. However if you mean that brands are different, but product is essentially same - then it depends on what kind of milk it is, how it was processed, how it was made, from what animals (cows, goats, almonds (yes - almond is an animal :P )) etc. Pasteurised vs natural, etc. No, the expiration date is not dictated by retailer. Rather its dictated by producer - whoever produces it marks it on the package.
[ "The shelf life of canned evaporated milk varies according to both its added content and its proportion of fat. For the regular unsweetened product a life of fifteen months can be expected before any noticeable destabilization occurs.\n", "Milk preserved by the UHT process does not need to be refrigerated before opening and has a much longer shelf life (six months) than milk in ordinary packaging. It is typically sold unrefrigerated in the UK, U.S., Europe, Latin America, and Australia.\n", "The production of milk requires that the cow be in lactation, which is a result of the cow having given birth to a calf. The cycle of insemination, pregnancy, parturition, and lactation, followed by a \"dry\" period of about two months of forty-five to fifty days, before calving which allows udder tissue to regenerate. A dry period that falls outside this time frame can result in decreased milk production in subsequent lactation.\n", "The dairy cow produces large amounts of milk in its lifetime. Production levels peak at around 40 to 60 days after calving. Production declines steadily afterwards until milking is stopped at about 10 months. The cow is \"dried off\" for about sixty days before calving again. Within a 12 to 14-month inter-calving cycle, the milking period is about 305 days or 10 months long. Among many variables, certain breeds produce more milk than others within a range of around 6,800 to 17,000 kg (15,000 to 37,500 lb) of milk per year.\n", "High-temperature short-time (HTST) pasteurization, such as that used for milk ( for 15 seconds) ensures safety of milk and provides a refrigerated shelf life of approximately two weeks. In ultra-high-temperature (UHT) pasteurization, milk is pasteurized at for 1–2 seconds, which provides the same level of safety, but along with the packaging, extends shelf life to three months under refrigeration.\n", "The production of milk requires that the cow be in lactation, which is a result of the cow having given birth to a calf. The cycle of insemination, pregnancy, parturition, and lactation is followed by a \"dry\" period of about two months before calving, which allows udder tissue to regenerate. A dry period that falls outside this time frames can result in decreased milk production in subsequent lactation. Dairy operations therefore include both the production of milk and the production of calves. Bull calves are either castrated and raised as steers for beef production or used for veal.\n", "For its production full-cream pasteurized milk is used. Its coagulation, at , lasts 30 minutes, then the curd is twice chopped in extremely little fragments. Finally, the bulk mass is put for 8–16 hours in a damp location. The aging lasts either 3–5 months (in this case the product has an aromatic and fragrant flavour), or 8–12 months. There are rare truckles aged up to 36 months. Sometimes the crust is flavoured with marcs.\n" ]
Is it possible to make an anti-matter atomic bomb?
Yes although we don't have anything close to the technology to make that. If exploded in a vacuum it would look the same as a regular nuclear bomb, if it was in contact with regular matter than there'd be an intense burst of gamma radiation as it annihilates with regular matter.
[ "Antimatter production and containment are currently impenetrable barriers (due to current technological limitations) to the creation of antimatter weapons. Quantities measured in grams will be required to achieve a destructive effect comparable with conventional nuclear weapons.\n", "Antimatter has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there is no evidence that it will ever be feasible. However, the U.S. Air Force funded studies of the physics of antimatter in the Cold War, and began considering its possible use in weapons, not just as a trigger, but as the explosive itself.\n", "An antimatter weapon is a theoretically possible device using antimatter as a power source, a propellant, or an explosive for a weapon. Antimatter weapons cannot yet be produced due to the current cost of production of antimatter (estimated at 63 trillion dollars per gram) given the extremely limited technology available to create it in sufficient masses to be viable in a weapon, and the fact that it annihilates upon touching ordinary matter, making containment very difficult.\n", "Antimatter, which consists of particles resembling ordinary matter particles in most of their properties but having opposite electric charge, has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there is no evidence that it is feasible beyond the military domain. However, the U.S. Air Force funded studies of the physics of antimatter in the Cold War, and began considering its possible use in weapons, not just as a trigger, but as the explosive itself. A fourth generation nuclear weapon design is related to, and relies upon, the same principle as antimatter-catalyzed nuclear pulse propulsion.\n", "Some researchers have examined the use of antimatter as an alternative fusion trigger, mainly in the context of antimatter-catalyzed nuclear pulse propulsion but also nuclear weapons. Such a system, in a weapons context, would have many of the desired properties of a pure fusion weapon. However, the technical barriers to producing and containing the required quantities of antimatter appear formidable, well beyond present capabilities.\n", "Antimatter-catalyzed nuclear pulse propulsion proposes the use of antimatter as a \"trigger\" to initiate small nuclear explosions; the explosions provide thrust to a spacecraft. The same technology could theoretically be used to make very small and possibly \"fission-free\" (very low nuclear fallout) weapons (see pure fusion weapon). Antimatter-catalyzed weapons could be more discriminate and result in less long-term contamination than conventional nuclear weapons, and their use might therefore be more politically acceptable.\n", "A still more speculative concept is antimatter catalyzed nuclear pulse propulsion, which would use tiny quantities of antimatter to catalyze a fission and fusion reaction, allowing much smaller fusion explosions to be created.\n" ]
I've noticed on a lot of milk crates they say something along the lines of "using this for anything other than milk is punishable by law" was stealing milk crates ever such a big problem that they had to make a law to address it or was this just a precaution?
Yes, that is the case. During the 1970s and 80s these plastic crates were regularly pilfered because of their solid construction and light weight. Today manufacturers have copied these designs and they're sold in stores as consumer goods. Some states have similar laws for shopping carts, possession is illegal.
[ "It was held that (1) the ban on plastic nonreturnable milk containers was rationally related to the achievement of legitimate state purposes and thus did not violate the equal protection or due process clauses of the Fourteenth Amendment, since the state legislature could rationally have decided that its ban on plastic nonreturnable milk jugs might foster greater use of environmentally desirable alternatives, even though another type of nonreturnable is permitted to continue in use, having concluded that nonreturnable, nonrefillable milk containers pose environmental hazards, it was not arbitrary or irrational to ban the most recent entry into the field while in effect \"grandfathering\" paperboard containers, and the legislature had concluded, on evidence sufficient to make the questions at least debatable, that the statute would help to conserve energy and ease the state's solid waste disposal problem, and (2) the statute did not violate the commerce clause, since it regulated even-handedly by prohibiting all milk retailers from selling their products in plastic, nonreturnable milk containers, without regard to whether the milk, the containers, or the sellers are from out of state, the burden imposed on interstate commerce was relatively minor and was not clearly excessive in light of the substantial state interest in promoting conservation of energy and other natural resources and easing solid waste disposal problems, and no approach with a lesser impact on interstate activities was available.\n", "In the mid-20th century, a few milk products were packaged in nearly rimless cans, reflecting different construction; in this case, one flat surface had a hole (for filling the nearly complete can) that was sealed after filling with a quickly solidifying drop of molten solder. Concern arose that the milk contained unsafe levels of lead leached from this solder plug.\n", "The case dealt with a federal law that prohibited filled milk (skimmed milk compounded with any fat or oil other than milk fat to resemble milk or cream) from being shipped in interstate commerce. The defendant, a company that traded in a form of filled milk consisting of condensed skim milk and coconut oil, argued that the law was unconstitutional because of both the Commerce Clause and the Due Process Clause.\n", "Similarly, in \"Minnesota v. Clover Leaf Creamery Co.\", 449 U.S. 456 (1981) the Court upheld a state law that banned nonreturnable milk containers made of plastic but permitted other nonreturnable milk containers. The Court found that the existence of a burden on out-of-state plastic industry was not 'clearly excessive' in comparison to the state's interest in promoting conservation. And the court continued:\n", "Milk crates and bottle crates are a form of reusable packaging used to ship to retail stores and to return empty bottles to the bottler or packager. These are usually moulded plastic designs expected to make several round trip shipments. Wood structures are also used.\n", "In 1977, the Milk Marketing Board and the Ontario Government banned the shipping of milk in cans, and vehicles with stainless steel bulk tanks were put into use. In 1979, a study of the plant's milk waste treatment process was carried out by the Water Research Centre, which was researching methods of treating dairy waste.\n", "The controversy centered on the narrow issue of whether the legislative classification between plastic and nonplastic, nonreturnable milk containers was rationally related to achievement of conservation.\n" ]
how do the ads next to porn videos know where i am?
Kids these days are exposed to porn at a far too early age.
[ "The rest of the video alternates between the pitching of advertising ideas and the concepts being shown in real time. The advertisement within the video opens with a woman (Lauren Francesca) in a two-piece running outfit jogging down a street, who is later joined by a second woman (Nicola Fiori) also jogging and similarly dressed. The camera frequently pans from the shoes to their breasts and faces, and closed captioning reading \"sexual breathing\". Seeing the chief marketing director's bored reaction, the designers begin to incorporate more graphic ideas into the advertisement, including the joggers headbutting various bystanders to death and engaging in a lesbian kiss, to the approval of the director and his executives, who toast champagne to celebrate their success.\n", "Article video marketing is a type of content marketing and advertising in which business create 30 seconds to 5-minute videos about specific topics. The videos are then uploaded to various video sharing websites like YouTube for distribution and exposure.\n", "In-image advertising uses “data about the image, its tags, and the surrounding content to match images with ads that are contextually relevant.” Once a website owner integrates the scripts onto their publishing systems, site visitors can move their mouse over the images or look at an image for a certain amount of time to reveal an ad.\n", "Video ads are shown either in in-game interstitials (e.g. when the game is loading a new screen) or through incentive-based advertising, i.e. you will get either an in-game reward or Facebook credits for watching an advertisement.\n", "A site's advertisers often are selling sexual products or services, which may compromise the sites image as an educational site, as they may be the same advertisers as at a pornographic site. Some sites choose not to work with financial sponsors, instead relying on reader donations—however, generally only sites with high levels of web traffic can support themselves in this way.\n", "The scenes are typically filmed in hotel rooms, usually in Central Europe. The actresses do not really know what the fake porn director does. Woodman shows the girls a Private magazine or some pornographic images and then inviting them to do something similar to what's displayed in the images. \n", "While ads show hardcore pornographic pictures, the users are not allowed to upload pictures with sexual content as profile pictures and pictures showing hardcore sexual activity in the picture gallery.\n" ]
how come americans have large portion sizes and relatively cheap prices for their food?
When you go to a restaurant, you pay for the service first, then for the actual food. As a rule of thumb, the ingredients usually make up only 1/4 to 1/3 of the costs. Additionally, the work of preparing a dish twice as large usually isn't twice as much for the chef. So it comes down to the customer's expectations. Americans expect large meals, so the restaurants deliver - without hurting their profits much.
[ "Portion sizes in the United States have increased markedly in the past several decades. For example, from 1977 to 1996, portion sizes increased by 60 percent for salty snacks and 52 percent for soft drinks. Importantly, larger product portion sizes and larger servings in restaurants and kitchens consistently increase food intake. Larger portion sizes may even cause people to eat more of foods that are ostensibly distasteful; in one study individuals ate significantly more stale, two-week-old popcorn when it was served in a large versus a medium-sized container.\n", "Another example is refreshments and snacks sold in theaters, fairs, and other venues. Small servings are proportionally more expensive than large servings. Customers choose the bigger size even if it is more than they would like to eat or drink because it seems like a better deal.\n", "In her preface to the first American edition in 1979, Grigson observed that although British and American cooks found each others' systems of measurement confusing (citing the US use of volume rather than weight for solid ingredients), the two countries were at one in suffering from supermarkets' obsession with the appearance rather than the flavour of vegetables. \n", "A value menu (not to be confused with a value meal) is a group of menu items at a fast food restaurant that are designed to be the least expensive items available. In the US, the items are usually priced between $0.99 and $1.49. The portion size, and number of items included with the food, are typically related to the price.\n", "Smaller communities have fewer choices in food retailers. Resident small grocers struggle to be profitable partly due to low sales numbers, which make it difficult to meet wholesale food suppliers' minimum purchasing requirements. The lack of competition and sales volume can result in higher food costs. For example, in New Mexico the same basket of groceries that cost rural residents $85, cost urban residents only $55. However, this is not true for all rural areas. A study in Iowa showed that grocers in four rural counties had lower costs on key foods that make up a nutritionally balanced diet than did larger supermarkets outside these food deserts (greater than 20 miles away).\n", "Price encompasses the amount of money paid by the consumer in order to purchase the food product. When pricing the food products, the manufacturer must bear in mind that the retailer will add a particular percentage to the price on the wholesale product. This percentage amount differs globally. The percentage is used to pay for the cost of producing, packaging, shipping, storing and selling the food product. For example, the purchasing of a food product in a supermarket selling for $3.50 generates an income of $2.20 for the manufacturer.\n", "Agricultural policy and techniques in the United States and Europe have led to lower food prices. In the United States, subsidization of corn, soy, wheat, and rice through the U.S. farm bill has made the main sources of processed food cheap compared to fruits and vegetables. Calorie count laws and nutrition facts labels attempt to steer people toward making healthier food choices, including awareness of how much food energy is being consumed.\n" ]
Doesn't the speed of light disprove Fermi's paradox?
When discussing the Fermi paradox, people usually only talk about civilizations in the Milky Way galaxy. The distance between galaxies is far to great to consider an inter-galactic civilization (though it may be possible). The diameter of the stellar disk of the Milky Way is only about 100,000 light-years. So if a civilization existed on the other side of the Milky Way and had the technology to peer on to the Earth, they would see a planet teeming with life! 100,000 years ago, the Earth was already inhabited by humans!
[ "In 1962 J. G. Fox pointed out that all previous experimental tests of the constancy of the speed of light were conducted using light which had passed through stationary material: glass, air, or the incomplete vacuum of deep space. As a result, all were thus subject to the effects of the extinction theorem. This implied that the light being measured would have had a velocity different from that of the original source. He concluded that there was likely as yet no acceptable proof of the second postulate of special relativity. This surprising gap in the experimental record was quickly closed in the ensuing years, by experiments by Fox, and by Alvager et al., which used gamma rays sourced from high energy mesons. The high energy levels of the measured photons, along with very careful accounting for extinction effects, eliminated any significant doubt from their results.\n", "The paradoxical aspect of each of the described thought experiments arises from Einstein’s theory of special relativity, which proclaims the speed of light (approx. 300,000 km/s) is the upper limit of speed in our universe. The uniformity of the speed of light is so absolute that regardless of the speed of the observer as well as the speed of the source of light the speed of the light ray should remain constant.\n", "Here, one does not regard the above result as a deduction from the Heisenberg theory, but as a \"basic hypothesis\" which is well established experimentally. This needs little explanation, e.g., in terms of the disturbance of instruments, but is merely our starting point for further analysis; as in Einstein's theory of special relativity, we start from the \"fact\" that the speed of light is a constant.\n", "The second postulate of Einstein's theory of special relativity states that the speed of light is invariant, regardless of the velocity of the source from which the light emanates. The extinction theorem (essentially) states that light passing through a transparent medium is simultaneously extinguished and re-emitted by the medium itself. This implies that information about the velocity of light from a moving source might be lost if the light passes through enough intervening transparent material before being measured. All measurements previous to the 1960s intending to verify the constancy of the speed of light from moving sources (primarily using moving mirrors, or extraterrestrial sources) were made only after the light had passed through such stationary material — that material being that of a glass lens, the terrestrial atmosphere, or even the incomplete vacuum of deep space. In 1961, Fox decided that there might not yet be any conclusive evidence for the second postulate: \"This is a surprising situation in which to find ourselves half a century after the inception of special relativity.\" Regardless, he remained fully confident in special relativity, noting that this created only a \"small gap\" in the experimental record.\n", "Teller remembered Fermi asking him, \"Edward, what do you think. How probable is it that within the next ten years we shall have clear evidence of a material object moving faster than light?\" Teller said, \"10^-6\" (one in a million). Fermi said, \"This is much too low. The probability is more like ten percent.\" Teller wrote in 1984 that this was \"the well known figure for a Fermi miracle.\"\n", "The constancy of the speed of light was motivated by Maxwell's theory of electromagnetism and the lack of evidence for the luminiferous ether. There is conflicting evidence on the extent to which Einstein was influenced by the null result of the Michelson–Morley experiment. In any case, the null result of the Michelson–Morley experiment helped the notion of the constancy of the speed of light gain widespread and rapid acceptance.\n", "Note that in this argument, we never assumed that energy could be transmitted faster than the speed of light. This shows that the results of the EPR experiment do not contradict the predictions of special relativity.\n" ]
is taking a shot of 100 proof alcohol the same as taking 1.25 shots of 80 proof?
Essentially yes. Except for the additional water in the 80 proof alcohol. But there is just as much alcohol in both shots so it will have the same effect on your blood alcohol content.
[ "The concentration of alcohol in a beverage is usually stated as the percentage of alcohol by volume  (ABV, the number of milliliters (ml) of pure ethanol in 100 ml of beverage) or as \"proof\". In the United States, \"proof\" is twice the percentage of alcohol by volume at 60 degrees Fahrenheit (e.g. 80 proof = 40% ABV). \"Degrees proof\" were formerly used in the United Kingdom, where 100 degrees proof was equivalent to 57.1% ABV. Historically, this was the most dilute spirit that would sustain the combustion of gunpowder.\n", "Up to the 20th century, alcoholic spirits were assessed in the UK by mixing with gunpowder and testing the mixture to see whether it would still burn; spirit that just passed the test was said to be at 100° proof. The UK now uses percentage alcohol by volume at 20 °C (68 °F), where spirit at 100° proof is approximately 57.15% ABV; the US uses a \"proof number\" of twice the ABV at 60 °F (15.5 °C).\n", "Alcohol proof is a measure of the content of ethanol (alcohol) in an alcoholic beverage. The term was originally used in England and was equal to about 1.821 times the alcohol by volume (ABV). The UK now uses the ABV standard instead of alcohol proof. In the United States, alcohol proof is defined as twice the percentage of ABV.\n", "BULLET::::- 4. If consumption is proven by a preponderance of the evidence, it is an affirmative defense under paragraph c of subsection 1 that the defendant consumed a sufficient quantity of alcohol after driving or being in actual physical control of the vehicle, and before their blood or breath was tested, to cause the defendant to have a concentration of alcohol of 0.08 or more in their blood or breath. A defendant who intends to offer this defense at a trial or preliminary hearing must, not less than 14 days before the trial or hearing or at such other time as the court may direct, file and serve on the prosecuting attorney a written notice of that intent. \"\n", "The term \"proof\" dates back to 16th century England, when spirits were taxed at different rates depending on their alcohol content. Spirits were tested by soaking a pellet of gunpowder in them. If the gunpowder could still burn, the spirits were rated above proof and taxed at a higher rate. As gunpowder would not burn if soaked in rum that contained less than 57.15% ABV, rum that contained this percentage of alcohol was defined as having 100 degrees proof. The gunpowder test was officially replaced by a specific gravity test in 1816.\n", "BULLET::::2. After having consumed sufficient alcohol that he has, at any relevant time after the driving, an alcohol concentration of 0.08 or more. The results of a chemical analysis shall be deemed sufficient evidence to prove a person's alcohol concentration; or\n", "BULLET::::- Overproof rums are much higher than the standard 40% ABV (80 proof), with many as high as 75% (150 proof) to 80% (160 proof) available. Two examples are Bacardi 151 or Pitorro moonshine. They are usually used in mixed drinks.\n" ]
why do humans start getting body odor after they go through puberty?
Basically (the way I was taught this at least) you have two major types of sweat glands, apocrine and eccrine. Sweat produced by eccrine glands is mostly water. Apocrine sweat is more oily and contains a whole bunch of other stuff (which I won't get into). So bacteria can metabolize the components of apocrine sweat far more readily. Apocrine glands (which are heavily concentrated in your pits and groin) are stimulated by sex hormones, the levels of which rise sharply during puberty. So you get an assload of oily sweat, which is then colonized by bacteria, who generate foul odors.
[ "The average beginning of pubarche varies due to many factors, including climate, nourishment, weight, nurture, and genes. First (and often transient) pubic hair resulting from adrenarche may appear between ages 10-12 preceding puberty.\n", "Before puberty effects of rising androgen levels occur in both boys and girls. These include adult-type body odor, increased oiliness of skin and hair, acne, pubarche (appearance of pubic hair), axillary hair (armpit hair), growth spurt, accelerated bone maturation, and facial hair.\n", "Estrogens are responsible for the development of female secondary sexual characteristics during puberty, including breast development, widening of the hips, and female fat distribution. Conversely, androgens are responsible for pubic and body hair growth, as well as acne and axillary odor.\n", "Apocrine sweat glands secrete sweat into the pubic hair follicles. This is broken down by bacteria on the skin and produces an odor, which some consider to act as an attractant sex pheromone. The labia minora may grow more prominent and undergo changes in color. At puberty the first monthly period known as menarche marks the onset of menstruation.\n", "In humans, the formation of body odor happens mostly in the axillary region. These odorant substances serve as pheromones which play a role related to mating. The underarm regions seem more important than the genital region for body odor which may be related to human bipedalism.\n", "The principal physical consequences of adrenarche are androgen effects, especially pubic hair (in which Tanner stage 2 becomes Tanner stage 3) and the change of sweat composition that produces adult body odor. Increased oiliness of the skin and hair and mild acne may occur. In most boys, these changes are indistinguishable from early testicular testosterone effects occurring at the beginning of gonadal puberty. In girls, the adrenal androgens of adrenarche produce most of the early androgenic changes of puberty: pubic hair, body odor, skin oiliness, and acne. In most girls the early androgen effects coincide with, or are a few months following, the earliest estrogenic effects of gonadal puberty (breast development and growth acceleration). As female puberty progresses, the ovaries and peripheral tissues become more important sources of androgens.\n", "Pregnant women have increased smell sensitivity, sometimes resulting in abnormal taste and smell perceptions, leading to food cravings or aversions. The ability to taste also decreases with age as the sense of smell tends to dominate the sense of taste. Chronic smell problems are reported in small numbers for those in their mid-twenties, with numbers increasing steadily, with overall sensitivity beginning to decline in the second decade of life, and then deteriorating appreciably as age increases, especially once over 70 years of age.\n" ]
Do bone conduction earphones protect hearing?
There's no reason to believe that they would. Hearing loss is usually caused by damage to the inner ear, which is still getting as much sound exposure with bone conduction as it would through the normal path of sound.
[ "It is a semi-implantable under the skin bone conduction hearing device coupled to the skull by a titanium fixture. The system transfers sound to the inner ear through the bone, thereby bypassing problems in the outer or middle ear. Candidates with a conductive, mixed or single-sided sensorineural hearing loss can therefore benefit from bone conduction hearing solutions.\n", "Ear protection refers to devices used to protect the ear, either externally from elements such as cold, intrusion by water and other environmental conditions, debris, or specifically from noise. High levels of exposure to noise may result in noise-induced hearing loss. Measures to protect the ear are referred to as hearing protection, and devices for that purpose are called hearing protection devices. In the context of work, adequate hearing protection is that which reduces noise exposure to below 85 dBA over the course of an average work shift of eight hours.\n", "Bone conduction is the conduction of sound to the inner ear primarily through the bones of the skull, allowing the hearer to perceive audio content without blocking the ear canal. Bone conduction transmission occurs constantly as sound waves vibrate bone, specifically the bones in the skull, although it is hard for the average individual to distinguish sound being conveyed through the bone as opposed to sound being conveyed through air via the ear canal. Intentional transmission of sound through bone can be used with individuals with normal hearing - as with bone-conduction headphones - or as a treatment option for certain types of hearing impairment. Bone generally conveys lower-frequency sounds better than higher frequency sound.\n", "Bone-anchored hearing aids use a surgically implanted abutment to transmit sound by direct conduction through bone to the inner ear, bypassing the external auditory canal and middle ear. A titanium prosthesis is surgically embedded into the skull with a small abutment exposed outside the skin. A sound processor sits on this abutment and transmits sound vibrations to the titanium implant. The implant vibrates the skull and inner ear, which stimulate the nerve fibers of the inner ear, allowing hearing.\n", "Dual hearing protection refers to the use of earplugs under ear muffs. This type of hearing protection is particularly recommended for workers in the Mining industry because they are exposed to extremely high noise levels, such as an 105 dBA TWA. Fortunately, there is an option of adding electronic features to dual hearing protectors. These features help with communication by making speech more clear, especially for those workers who already have hearing loss. \n", "Patients with chronic ear infection where the drum and/or the small bones in the middle ear are damaged often have hearing loss, but difficulties in using a hearing aid fitted in the ear canal. Direct bone conduction through a vibrator attached to a skin-penetrating implant addresses these disadvantages.\n", "A hearing protection device, also known as a HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise to help prevent noise-induced hearing loss. HPDs reduce (not eliminate) the level of the noise entering the ear. HPDs can also protect against other effects of noise exposure such as tinnitus and hyperacusis. There are many different types of HPDs available for use, including earmuffs, earplugs, electronic hearing protection devices, and semi-insert devices. \n" ]
why do circles tesselate hexagonally?
It's all geometry. Assuming equal radii between all circles, if you place them in a way that they don't intersect but touch each other at exactly one point (tessellating) and you start with just 3 circles, those circles form a triangle shape. If you connect the centerpoints of those circles, it forms an equilateral triangle (equal length sides, each corner is 60°). So if you continue placing circles the same way around that center circle, you can do that a total of 6 times because 360°/60°=6. A hexagon has 6 sides. Hope this helps.
[ "A study by David George Kendall used the techniques of shape analysis to examine the triangles formed by standing stones to deduce if these were often arranged in straight lines. The shape of a triangle can be represented as a point on the sphere, and the distribution of all shapes can be thought of as a distribution over the sphere. The sample distribution from the standing stones was compared with the theoretical distribution to show that the occurrence of straight lines was no more than average.\n", "A tessellation, also known as a tiling, is a set of shapes that must cover the entire plane without the shapes overlapping. This repeating shape must cover every part of the plane without overlapping. An edge tessellation, is a special type of tessellation that is created by flipping or reflecting the shape over an edge. This can also be called a \"folding\" tessellation.\n", "By considering the family of maximally dense packings of the smoothed octagon, the requirement that the packing density remain the same as the point of contact between neighbouring octagons changes can be used to determine the shape of the corners. In the figure, three octagons rotate while the area of the triangle formed by their centres remains constant, keeping them packed together as closely as possible. For regular octagons, the red and blue shapes would overlap, so to enable the rotation to proceed the corners are clipped by a point that lies halfway between their centres, generating the required curve, which turns out to be a hyperbola.\n", "The circle symbolizes unity and diversity in nature, and many Islamic patterns are drawn starting with a circle. For example, the decoration of the 15th-century mosque in Yazd, Persia is based on a circle, divided into six by six circles drawn around it, all touching at its centre and each touching its two neighbours' centres to form a regular hexagon. On this basis is constructed a six-pointed star surrounded by six smaller irregular hexagons to form a tessellating star pattern. This forms the basic design which is outlined in white on the wall of the mosque. That design, however, is overlaid with an intersecting tracery in blue around tiles of other colours, forming an elaborate pattern that partially conceals the original and underlying design. A similar design forms the logo of the Mohammed Ali Research Center.\n", "A Reuleaux triangle is a shape formed from the intersection of three circular disks, each having its center on the boundary of the other two. Its boundary is a curve of constant width, the simplest and best known such curve other than the circle itself. Constant width means that the separation of every two parallel supporting lines is the same, independent of their orientation. Because all its diameters are the same, the Reuleaux triangle is one answer to the question \"Other than a circle, what shape can a manhole cover be made so that it cannot fall down through the hole?\"\n", "One method of squaring the circle, due to Archimedes, makes use of an Archimedean spiral. Archimedes also showed how the spiral can be used to trisect an angle. Both approaches relax the traditional limitations on the use of straightedge and compass in ancient Greek geometric proofs.\n", "The eigenvalues of the circle system plotted in the complex plane form a trefoil shape. The eigenvalues from a short line form a sideways Y, but those of a long line begin to resemble the trefoil shape of the circle. This could be due to the fact that a long line is indistinguishable from a circle to those species far from the ends.\n" ]
Where do vegetables and fruit/nut bearing plants get their vitamins and minerals?
They get all the minerals they need from the soil. Vitamins for plants aren't the same necessarily as our vitamins, because a vitamin is something the organism needs to survive but cannot produce on its own (vitamin D is not a true vitamin to us). So, for example, plants can produce vitamin C (ascorbic acid) through a glucose metabolism pathway. We do not have this pathway and need to consume it. Additionally, plants can make alpha-linolenic acid (ALA) which is the first omega-3 fatty acid. We cannot make ALA because we lack desaturase enzymes beyond 9, whereas 12 and 15 are required to form ALA from stearic acid. But essentially plants, being autotrophs, only get some things from soil and air; the rest they can synthesize.
[ "Vitamins and minerals are required for normal metabolism but which the body cannot manufacture itself and which must therefore come from external sources. Vitamins come from several sources including fresh fruit and vegetables (Vitamin C), carrots, liver (Vitamin A), cereal bran, bread, liver (B vitamins), fish liver oil (Vitamin D) and fresh green vegetables (Vitamin K). Many minerals are also essential in small quantities including iron, calcium, magnesium, sodium chloride and sulfur; and in very small quantities copper, zinc and selenium. The micronutrients, minerals, and vitamins in fruit and vegetables may be destroyed or eluted by cooking. Vitamin C is especially prone to oxidation during cooking and may be completely destroyed by protracted cooking. The bioavailability of some vitamins such as thiamin, vitamin B6, niacin, folate, and carotenoids are increased with cooking by being freed from the food microstructure. Blanching or steaming vegetables is a way of minimizing vitamin and mineral loss in cooking.\n", "At least 17 elements are known to be essential nutrients for plants. In relatively large amounts, the soil supplies nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur; these are often called the macronutrients. In relatively small amounts, the soil supplies iron, manganese, boron, molybdenum, copper, zinc, chlorine, and cobalt, the so-called micronutrients. Nutrients must be available not only in sufficient amounts but also in appropriate ratios.\n", "They are also good sources of vitamin C and flavonoids. The content of vitamin C in the fruit depends on the species, variety, and mode of cultivation. Fruits produced with organic agriculture have been shown to contain more vitamin C than those produced with conventional agriculture in the Algarve, but results depended on the species and cultivar.\n", "While plant foods are generally a good source of vitamin C, the amount in foods of plant origin depends on the variety of the plant, soil condition, climate where it grew, length of time since it was picked, storage conditions, and method of preparation. The following table is approximate and shows the relative abundance in different raw plant sources. As some plants were analyzed fresh while others were dried (thus, artificially increasing concentration of individual constituents like vitamin C), the data are subject to potential variation and difficulties for comparison. The amount is given in milligrams per 100 grams of the edible portion of the fruit or vegetable:\n", "BULLET::::- Vitamin C (ascorbic acid) is a water-soluble compound that fulfills several roles in living systems. Sources include citrus fruits (such as oranges, sweet lime, etc.), green peppers, broccoli, green leafy vegetables, black currants, strawberries, blueberries, seabuckthorn, raw cabbage and tomatoes.\n", "Aside from performed vitamin A, vitamin B and vitamin D, all vitamins found in animal source foods may also be found in plant-derived foods. Examples are tofu to replace meat (both contain protein in sufficient amounts), and certain seaweeds and vegetables as respectively kombu and kale to replace dairy foods as milk (both contain calcium in sufficient amounts). There are some nutrients which are rare to find in sufficient density in plant based foods. One example would be zinc, the exception would be pumpkin seeds that have been soaked for improved digestion. The increased fiber in these foods can also make absorption difficult. Deficiencies are very possible in these nutrients if vegetarians are not very careful and willing to eat sufficient quantities of these exceptional plant based foods. A good way to find these foods would be to search for them on one of the online, nutrient analyzing databases. An example would be nutritiondata.com.\n", "The nutrients required for healthy plant life are classified according to the elements, but the elements are not used as fertilizers. Instead compounds containing these elements are the basis of fertilizers. The macro-nutrients are consumed in larger quantities and are present in plant tissue in quantities from 0.15% to 6.0% on a dry matter (DM) (0% moisture) basis. Plants are made up of four main elements: hydrogen, oxygen, carbon, and nitrogen. Carbon, hydrogen and oxygen are widely available as water and carbon dioxide. Although nitrogen makes up most of the atmosphere, it is in a form that is unavailable to plants. Nitrogen is the most important fertilizer since nitrogen is present in proteins, DNA and other components (e.g., chlorophyll). To be nutritious to plants, nitrogen must be made available in a \"fixed\" form. Only some bacteria and their host plants (notably legumes) can fix atmospheric nitrogen (N) by converting it to ammonia. Phosphate is required for the production of DNA and ATP, the main energy carrier in cells, as well as certain lipids.\n" ]
What's the noise a formula 1 makes when it changes gears?
It's most likely a backfire. When the car is accelerating its at full throttle/load, and the engine runs out of power, so it's time to change gears. imagine going from full throttle to no throttle (changing gears) then back to full throttle. The bang u hear is unburnt fuel exploding in the exhaust after its left the combustion chamber, which is after engine has gone off full throttle to change gears. It's excess fuel that was needed to sustain full power, but is no longer needed when off throttle.
[ "BULLET::::- Transmission problems were tackled by adding a further mounting-point (making five) for the whole engine and transmission assembly at the back of the gearbox where it was supported by an extra chassis cross-member. The transmission made a significant humming noise while in neutral and there were difficulties with excessive vibration from oil surge in the fluid flywheel when picking up under heavy load at low speed. The transmission mechanism for top-gear was modified to reduce pedal pressure and ensure positive engagement and disengagement while avoiding a humming sound in neutral.\n", "The race start was delayed by 45 minutes due to the heavy rain. With the rain soaking the track, Niki Lauda sought out Bernie Ecclestone on the grid in a bid to have the tunnel flooded as well. The tunnel was dry but coated with oil from the previous days' use (as well as from the historic cars which were on the program that weekend) which Lauda explained had turned it into a fifth gear skid pad when the cars came racing in carrying the spray from their tyres in the morning warmup. Ecclestone used his power as the head of the Formula One Constructors Association to do exactly that, with a local fire truck called in to water down the only dry road on the track.\n", "A modern F1 clutch is a multi-plate carbon design with a diameter of less than , weighing less than and handling around . race season, all teams are using seamless shift transmissions, which allow almost instantaneous changing of gears with minimum loss of drive. Shift times for Formula One cars are in the region of 0.05 seconds. In order to keep costs low in Formula One, gearboxes must last five consecutive events and since 2015, gearbox ratios will be fixed for each season (for 2014 they could be changed only once). Changing a gearbox before the allowed time will cause a penalty of five places drop on the starting grid for the first event that the new gearbox is used.\n", "\"After engaging the first gear and a somewhat careless step on the gas pedal you get a touched feel to the epiphany GTV6 shot, accompanied by the typical Alfa Romeo exhaust sound. It was a pleasure. The fact was the sprint from 0 to is not further under the seven-second limited by a tricky-to-be-shifted five-speed gearbox. The really vehement propulsion waned only when the speedometer mark has left behind. Another eye-opening experience awaits when you realize that the lightning speed to 7000 rpm rotating in any gear pinion even in fifth gear still from 1500 rpm is completely smooth.\"\n", "BULLET::::- Noise 2: This noise, commonly referred to as gear rattle, can be induced by lugging the engine in any gear, but is usually most noticeable in first or second gear. While the noise is occurring, if you press lightly on the clutch pedal without releasing the clutch, the noise will be reduced or eliminated.\n", "Once the field was filled to 33 cars, bumping would begin. The slowest car in the field, regardless of the day it was qualified, was \"on the bubble.\" If a driver went out and qualified faster, the bubble car would be bumped, and the new qualifier would be added to the field. The bumped car would be removed from the grid, and all cars that were behind him would move up a spot. The new driver would take his position according to his speed rank on the day he qualified (typically the final day). This procedure would be repeated until the track closed at 6 p.m. on the final day of qualifying. Bumped cars could not be re-qualified. A bumped driver would have to secure a back-up car (assuming it had attempts left on it) in order to bump his way back into the field.\n", "The sound was adopted as the sound of a Formula One car as early as 2001 in the form of \"Deng Deng Form\" and later \"The Insanity Test\" both of which were a static background of a Ferrari Formula One car accompanied by the sound.\n" ]
what determines how internet lag in different games looks?
Male programmer type guy here. It just depends on how the programmers who made the game decided to handle the case where the game isn't getting updates from the server. Some games leave the character in place, and then warp him when the updates resume. Others avoid the warp by having the character fly from their old position to the new one. I seem to remember that neverwinter nights had a thing where it would try to estimate where the character would be based on their last position and trajectory, which led to weird glitches. I could be making that up though.
[ "Since the game requires information on the location of other players, there is sometimes a delay as this information travels over the network. This occurs in games where the input signals are \"held\" for several frames (to allow time for the data to arrive at every player's console/PC) before being used to render the next frame. At 25 FPS, holding 4 frames adds to the overall input lag. However, very few modern online games use this method. The view angle of every modern AAA shooter game is completely unaffected by network lag, for example. In addition, lag compensating code makes classification a complex issue.\n", "Lag due to an insufficient update rate between client and server can cause some problems, but these are generally limited to the client itself. Other players may notice jerky movement and similar problems with the player associated with the affected client, but the real problem lies with the client itself. If the client cannot update the game state at a quick enough pace, the player may be shown outdated renditions of the game, which in turn cause various problems with hit- and collision detection. If the low update rate is caused by a low frame rate (as opposed to a setting on the client, as some games allow), these problems are usually overshadowed by numerous problems related to the client-side processing itself. Both the display and controls will be sluggish and unresponsive. While this may increase the perceived lag, it is important to note that it is of a different kind than network-related delays. In comparison, the same problem on the server may cause significant problems for all clients involved. If the server is unable or unwilling to accept packets from clients fast enough and process these in a timely manner, client actions may never be registered. When the server then sends out updates to the clients, they may experience freezing (unresponsive game) and/or rollbacks, depending on what types of lag compensation, if any, the game uses.\n", "Testing has found that overall \"input lag\" (from controller input to display response) times of approximately are distracting to the user. It also appears that (excluding the monitor/television display lag) is an average response time and the most sensitive games (fighting games, first person shooters and rhythm games) achieve response times of (excluding display lag).\n", "The noticeable effects of lag vary not only depending on the exact cause, but also on any and all techniques for lag compensation that the game may implement (described below). As all clients experience some delay, implementing these methods to minimize the effect on players is important for smooth gameplay. Lag causes numerous problems for issues such as accurate rendering of the game state and hit detection. In many games, lag is often frowned upon because it disrupts normal gameplay. The severity of lag depends on the type of game and its inherent tolerance for lag. Some games with a slower pace can tolerate significant delays without any need to compensate at all, whereas others with a faster pace are considerably more sensitive and require extensive use of compensation to be playable (such as the first-person shooter genre). Due to the various problems lag can cause, players that have an insufficiently fast Internet connection are sometimes not permitted, or discouraged from playing with other players or servers that have a distant server host or have high latency to one another. Extreme cases of lag may result in extensive desynchronization of the game state.\n", "In the peer-to-peer gaming model, lagging is what happens when the stream of data between one or more players gets slowed or interrupted, causing movement to stutter and making opponents appear to behave erratically. By using a lag switch, a player is able to disrupt uploads from the client to the server, while their own client queues up the actions performed. The goal is to gain advantage over another player without reciprocation; opponents slow down or stop moving, allowing the lag switch user to easily outmaneuver them. From the opponent's perspective, the player using the device may appear to be teleporting, invisible or invincible, while the opponents suffer delayed animations and fast-forwarded game play, delivered in bursts. Some gaming communities refer to this method as \"tapping\" which refers to the users \"tapping\" on and off their internet connection to create the lag.\n", "As an interesting first, this movie features the appearance of lag, a gameplay error due to network transfer slowdown often encountered in online games. Oshii displays lag as an ailment that causes physical convulsions in the player during these slowdowns.\n", "Lag due to network delay is in contrast often less of a problem. Though more common, the actual effects are generally smaller, and it is possible to compensate for these types of delays. Without any form of lag compensation, the clients will notice that the game responds only a short time after an action is performed. This is especially problematic in first-person shooters, where enemies are likely to move as a player attempts to shoot them and the margin for errors is often small.\n" ]
In the United States, have there been any particularly strong Vice Presidents, and how was The Senate different under them?
In addition to Calhoun, John Adams regularly presided over the Senate and partook in debates, and beats Calhoun by one vote for the most tie breaks. That said, while they are the nominal head of the Senate, the Constitution also says that the House and Senate get to write their own procedural rules in Article I, Section V, Clause II: > Each House may determine the Rules of its Proceedings, punish its Members for disorderly Behavior, and, with the Concurrence of two thirds, expel a member. In practical terms, the Vice President doesn't have much power if the Senate decides to write the rules to say that they can't do anything other than break ties and be physically present, the only things the constitution explicitly grants them authority to do so. Something like Frank Underwood barging into the Senate and immediately taking over wouldn't really happen since at present, party leaders run the floor and they have junior senators sit in the presiding chair.
[ "He served as one of several alternating presidents pro tempore of the United States Senate during the 62nd Congress (1911 to 1913), as part of a compromise under which Bacon and four senators from the Republican majority rotated in the office because no single candidate in either party was able to secure a majority vote.\n", "Over the next few decades the Senate rose in reputation in the United States and the world. John C. Calhoun, Daniel Webster, Thomas Hart Benton, Stephen A. Douglas, and Henry Clay overshadowed several presidents. Sir Henry Maine called the Senate \"the only thoroughly successful institution which has been established since the tide of modern democracy began to run.\" William Ewart Gladstone said the Senate was \"the most remarkable of all the inventions of modern politics.\"\n", "A procedural issue of the early Senate was what role the vice president, the President of the Senate, should have. The first vice president was allowed to craft legislation and participate in debates, but those rights were taken away relatively quickly. John Adams seldom missed a session, but later vice presidents made Senate attendance a rarity. Although the founders intended the Senate to be the slower legislative body, in the early years of the Republic, it was the House that took its time passing legislation. Alexander Hamilton's Bank of the United States and Assumption Bill (he was then Treasury Secretary), both of which were controversial, easily passed the Senate, only to meet opposition from the House.\n", "Richard Mentor Johnson (October 17, 1780 – November 19, 1850) was a politician and the ninth vice president of the United States from 1837 to 1841. He is the only vice president elected by the United States Senate under the provisions of the Twelfth Amendment. Johnson also represented Kentucky in the U.S. House of Representatives and Senate; he began and ended his political career in the Kentucky House of Representatives.\n", " confers upon the vice president the title President of the Senate and authorizes him to preside over Senate meetings. In this capacity, the vice president is charged with maintaining order and decorum, recognizing members to speak, and interpreting the Senate's rules, practices, and precedent. The first two vice presidents, John Adams and Thomas Jefferson, both of whom gained the office by virtue of being runners-up in presidential contests, presided regularly over Senate proceedings, and did much to shape the role of Senate president. Several 19th century vice presidents—such as George Dallas, Levi Morton, and Garret Hobart—followed their example and led effectively, while others were rarely present.\n", "There have been 48 vice presidents of the United States since the office came into existence in 1789. Originally, the vice president was the person who received the second most votes for president in the Electoral College. However, in the election of 1800 a tie in the electoral college between Thomas Jefferson and Aaron Burr led to the selection of the president by the House of Representatives. To prevent such an event from happening again, the Twelfth Amendment was added to the Constitution, creating the current system where electors cast a separate ballot for the vice presidency.\n", "The Vice President of the United States, as provided by the United States Constitution formally presides over the upper house, the Senate. In practice, however, the Vice President has a rare presence in Congress owing to responsibilities in the Executive branch and the fact that the Vice President may only vote to break a tie. In the Vice President's absence, the presiding role is delegated to the most Senior member of the majority party, who is the President pro tempore of the United States Senate. Since the Senate's rules give little power to its non-member presider (who may be of the opposite party), the task of presiding over daily business is typically rotated among junior members of the majority party.\n" ]
Do black holes really vary in size or does the collapsed point in space just vary in intensity?
Every amount of mass has some radius that, were it all to be compressed within the radius, it would form a black hole. This is called the Schwartzchild radius, and it's calculated by the formula r=2GM/c^2 . G is the gravitational constant, and c is the speed of light. These are both constant, so the math works out the same for them every time and the quantity of mass is the only variable that can alter the radius. Interestingly, smaller black holes will spaghettify you much faster than larger black holes will. This is because of the tidal force. Anything that enters a black hole is stretched apart by its gravity. The gravitational force weakens with distance; the parts of you closer to the black hole (say, your feet, if you're falling straight in) end up attracted by its gravity more forcefully than the parts away from you (like your head, in this analogy). This effect magnifies as you are stretched more and more until... well, spaghettification is the scientific term for this for a reason. With larger black holes, the difference in position of your head and your feet, relative to the size of the black hole, is smaller than it is with smaller black holes. Your feet will still be pulled more forcefully than your head, but the difference won't be as drastic. With a large enough black hole, you might be able to survive a decent part of your trip to the singularity. So, the size of a black hole is dependent solely on its mass, but a more massive black hole will take longer to destroy you. Either way, you aren't getting out.
[ "In general relativity, if a star collapses to a size smaller than its Schwarzschild radius, an event horizon will exist at that radius and the star will become a black hole. Thus, the size of a preon star may vary from around 1 metre with an absolute mass of 100 Earths to the size of a pea with a mass roughly equal to that of the Moon.\n", "A vacancy exists in the observed mass distribution of black holes. Black holes that spawn from dying stars have masses . The minimal supermassive black hole is approximately a hundred thousand solar masses. Mass scales between these ranges are dubbed intermediate-mass black holes. Such a gap suggests a different formation process. However, some models suggest that ultraluminous X-ray sources (ULXs) may be black holes from this missing group.\n", "Black holes can be classified based on their Schwarzschild radius, or equivalently, by their density. As the radius is linearly related to mass, while the enclosed volume corresponds to the third power of the radius, small black holes are therefore much more dense than large ones. The volume enclosed in the event horizon of the most massive black holes has an average density lower than main sequence stars.\n", "The maximally extended solution does not describe a typical black hole created from the collapse of a star, as the surface of the collapsed star replaces the sector of the solution containing the past-oriented \"white hole\" geometry and other universe.\n", "Black holes are talked about in this chapter. Black holes are stars that have collapsed into one very small point. This small point is called a \"singularity\". Black holes suck things into their center because they have very strong gravity. Some of the things it can suck in are light and stars. Only very large stars, called \"super-giants\", are big enough to become a black hole. \n", "Claims of intermediate mass black holes have been met with some skepticism. The heaviest objects in globular clusters are expected to migrate to the cluster center due to mass segregation. As pointed out in two papers by Holger Baumgardt and collaborators, the mass-to-light ratio should rise sharply towards the center of the cluster, even without a black hole, in both M15 and Mayall II.\n", "On the other hand, the nature of the kind of singularity to be expected inside a black hole remains rather controversial. According to some theories, at a later stage, the collapsing object will reach the maximum possible energy density for a certain volume of space or the Planck density (as there is nothing that can stop it). This is when the known laws of gravity cease to be valid. There are competing theories as to what occurs at this point, but it can no longer really be considered gravitational collapse at that stage.\n" ]
why do strange graphical effects sometimes occur when alt+tabbing a computer game?
It's because the game takes up the majority of your computer's resources and stays at the forefront. Your computer needs to load in all the other stuff that the OS and other programs need before you can use them.
[ "\"Glitching\" is also used to describe the state of a video game undergoing a glitch. The frequency in which a game undergoes glitching is often used by reviewers when examining the overall gameplay, or specific game aspects such as graphics. Some games such as Metroid have lower review scores today because in retrospect, the game may be very prone to glitches and be below what would be acceptable today.\n", "Glitches may include incorrectly displayed graphics, collision detection errors, game freezes/crashes, sound errors, and other issues. Graphical glitches are especially notorious in platforming games, where malformed textures can directly affect gameplay (for example, by displaying a ground texture where the code calls for an area that should damage the character, or by \"not\" displaying a wall texture where there should be one, resulting in an invisible wall). Some glitches are potentially dangerous to the game's stored data.\n", "Texture/model glitches are a kind of bug or other error that causes any specific model or texture to either become distorted or otherwise to not look as intended by the developers. Bethesda's \"\" is notorious for texture glitches, as well as other errors that affect many of the company's popular titles. Many games that use ragdoll physics for their character models can have such glitches happen to them.\n", "Software errors not detected by software testers during development can find their way into released versions of computer and video games. This may happen because the glitch only occurs under unusual circumstances in the game, was deemed too minor to correct, or because the game development was hurried to meet a publication deadline. Glitches can range from minor graphical errors to serious bugs that can delete saved data or cause the game to malfunction. In some cases publishers will release updates (referred to as \"patches\") to repair glitches. Sometimes a glitch may be beneficial to the player; these are often referred to as exploits.\n", "Crash to desktop bugs are considered particularly problematic for users. Since they frequently display no error message, it can be very difficult to track down the source of the problem, especially if the times they occur and the actions taking place right before the crash do not appear to have any pattern or common ground. One way to track down the source of the problem for games is to run them in windowed-mode. Windows Vista has a feature that can help track down the cause of a CTD problem when it occurs on any program. Windows XP included a similar feature as well.\n", "\"Glitching\" is the practice of players exploiting faults in a video game's programming to achieve tasks that give them an unfair advantage in the game, over NPC's or other players, such as running through walls or defying the game's physics. Glitches can be deliberately induced in certain home video game consoles by manipulating the game medium, such as tilting a ROM cartridge to disconnect one or more connections along the edge connector and interrupt part of the flow of data between the cartridge and the console. This can result in graphic, music, or gameplay errors. Doing this, however, carries the risk of crashing the game or even causing permanent damage to the game medium.\n", "Non-cosmetic modifications to a game, console, or controller are not allowed. Glitches that are triggered by interfering with the normal operation of the hardware or game media while the game is running, such as the crooked cartridge trick are not permitted. In-game glitches or exploits may be permissible, contingent on the category being run. \n" ]
How much of time dilation is due to the gravity well versus relative velocity?
You can indeed separate the two effects if the field is weak. I've done the explicit computation for the orbit of Mercury around the sun [here](_URL_0_). It turns out that in a circular orbit the time dilation due to the orbital speed is exactly half the gravitational time dilation. P.S.: GPS satellites are *not* in geosynchronous orbit.
[ "In 2010, Chou \"et al\". performed tests in which both gravitational and velocity effects were measured at velocities and gravitational potentials much smaller than those used in the mountain-valley experiments of the 1970s. It was possible to confirm velocity time dilation at the 10 level at speeds below 36 km/h. Also, gravitational time dilation was measured from a difference in elevation between two clocks of only .\n", "Contrarily to velocity time dilation, in which both observers measure the other as aging slower (a reciprocal effect), gravitational time dilation is not reciprocal. This means that with gravitational time dilation both observers agree that the clock nearer the center of the gravitational field is slower in rate, and they agree on the ratio of the difference.\n", "That is, the stronger the gravitational field (and, thus, the larger the acceleration), the more slowly time runs. The predictions of time dilation are confirmed by particle acceleration experiments and cosmic ray evidence, where moving particles decay more slowly than their less energetic counterparts. Gravitational time dilation gives rise to the phenomenon of gravitational redshift and Shapiro signal travel time delays near massive objects such as the sun. The Global Positioning System must also adjust signals to account for this effect.\n", "Gravitational time dilation is at play e.g. for ISS astronauts. While the astronauts' relative velocity slows down their time, the reduced gravitational influence at their location speeds it up, although at a lesser degree. Also, a climber's time is theoretically passing slightly faster at the top of a mountain compared to people at sea level. It has also been calculated that due to time dilation, the core of the Earth is 2.5 years younger than the crust. \"A clock used to time a full rotation of the earth will measure the day to be approximately an extra 10 ns/day longer for every km of altitude above the reference geoid.\" Travel to regions of space where extreme gravitational time dilation is taking place, such as near a black hole, could yield time-shifting results analogous to those of near-lightspeed space travel.\n", "Gravitational time dilation is experienced by an observer that, at a certain altitude within a gravitational potential well, finds that his local clocks measure less elapsed time than identical clocks situated at higher altitude (and which are therefore at higher gravitational potential).\n", "Gravitational time dilation is a form of time dilation, an actual difference of elapsed time between two events as measured by observers situated at varying distances from a gravitating mass. The higher the gravitational potential (the farther the clock is from the source of gravitation), the faster time passes. Albert Einstein originally predicted this effect in his theory of relativity and it has since been confirmed by tests of general relativity.\n", "Gravitational time dilation is a phenomenon predicted by the theory of General Relativity whereby time passes more slowly in regions of lower gravitational potential. Scientists used the lander to test this hypothesis, by sending radio signals to the lander on Mars, and instructing the lander to send back signals, in cases which sometimes included the signal passing close to the Sun. Scientists found that the observed Shapiro delays of the signals matched the predictions of General Relativity.\n" ]
how exactly is the “stop/start” automatic engine feature in newer cars “better”?
Barely any wear and tear, better for the environment as all that time you spend not moving while the engine running is time that CO2 and pollutants are spewing out when they don't need to be. Multiply all that time by millions and millions of cars and you have a significant CO2 saving. Saves fuel and thus cash too.
[ "From 2011, Stop/Start was added to certain engines (engines with (S/S) are bold in CO2 column), a cleaner, more powerful 1.7 CDTI auto was added, and the petrol engines became slightly more efficient. A six speed automatic gearbox became available for the 1.4T (120) petrol engine.\n", "The automatic transmission also has the ability to change the shift points, and hold the gears longer when the engine is operating at higher RPMs. This is achieved by pressing the accelerator pedal quickly, which causes an indicator light marked as \"Power\" at the bottom center of the instrument cluster to light up. The European and Australian version came equipped with a center console installed override switch labeled \"AT Econo\" which instructed the computer to utilize the \"Power\" mode, and remain so until the switch was reset to \"Econo\" mode. The \"Power\" mode was also available for engine braking, causing the transmission to downshift 500 rpm earlier than in \"normal\" mode. For 1991, the \"Manual\" button on the gearshift was replaced by a \"Econo\" switch on the gearshift, and the console mounted button was changed from \"AT Econo\" to \"Manual\", so that the transmission was always in \"Econo\" mode until the gearshift mounted switch was disengaged. Unlike the United States and Japanese version, which went into \"Power\" mode only when the accelerator was pushed rapidly, the \"Power\" mode on the European and Australian version was activated by either console or gearshift installed switches.\n", "The automatic transmission also has the ability to change the shift points, and hold the gears longer when the engine is operating at higher RPM. This is achieved by pressing the accelerator pedal rapidly, which causes the transmission to hold the gear until 5000 rpm before shifting to the next gear. No indicator light appears in the instrument cluster, unlike previous generations. The transmission also has engine over-rev protection by shifting the transmission to the next available gear once 6500 rpm has been achieved, even if the gear selector is in a low gear position.\n", "The Startix automatic engine starting mechanism was a relay in a small box added to the vehicle's electrical system. It automatically started an engine from cold or if stalled. It was supplied to vehicle manufacturers in the mid 1930s and later as an aftermarket accessory — in the USA by Bendix Aviation Corporation Eclipse Machine Division and in UK by Joseph Lucas & Son both of which businesses made electric self-starters. Such devices are now part of the engine management systems which switch off and on to conserve fuel.\n", "For certain applications, the slippage inherent in automatic transmissions can be advantageous. For instance, in drag racing, the automatic transmission allows the car to stop with the engine at a high rpm (the \"stall speed\") to allow for a very quick launch when the brakes are released. In fact, a common modification is to increase the stall speed of the transmission. This is even more advantageous for turbocharged engines, where the turbocharger must be kept spinning at high rpm by a large flow of exhaust to maintain the boost pressure and eliminate the turbo lag that occurs when the throttle suddenly opens on an idling engine.\n", "There was the appeal of the \"power everything\" car which automatically started its engine. Many early automatics had no lock up of their transmission, for example Dynaflow, Powerglide and Ultramatic though Hydramatic did. \n", "Start/Stop technology on vehicles with automatic transmissions first appeared with the introduction of the new, more powerful (112 kW; 150 hp), B14XFT 1.4 litre direct injection (DI) VVT Turbo petrol engine for model year 2016 and was incorporated on other select petrol and diesel engines paired with automatic transmissions by model year 2018.\n" ]
how do all the bodies, tanks etc. get cleaned off the battlefields?
Usually they don't. Outside of Kursk you can take a spade out West of the city and dig down just a few inches to human remains, shell casings, etc. Vehicles were only removed if they were salvageable or were in the way. After the war civilians gleaned the site for years for scrap but anything else was just abandoned. Modern armies recover bodies for burial, but when the battlefields are too massive sometimes they dont. Remains are still found in Flanders when someone digs a well and new phone line is laid. In Germany the Allies employed POW's for years in work gangs cleaning up battlefields. Once a tank burns it is useless. The heat from the fire ruins the temper of the armor, so they were just abandoned. Military trucks were used as work horses all over Europe for years so people stripped all the wrecks of parts pretty quickly. The hulks got towed to scrap yards.
[ "To this day, the remains of missing soldiers are still found in the countryside around the town of Ypres. Typically, such finds are made during building work or road-mending activities. Any human remains discovered receive a proper burial in one of the war cemeteries in the region. If the remains can be identified, the relevant name is removed from the Menin Gate.\n", "In the aftermath of a war, large areas of the region of conflict are often strewn with \"war debris\" in the form of abandoned or destroyed hardware and vehicles, mines, unexploded ordnance, bullet casings and other fragments of metal.\n", "In July 2014, the EPA ordered the Army to clean up the site on the grounds, that the military should not have entrusted Explo Systems to handle such a large amount of the propellant. Three private firms, General Dynamics Corporation, Alliant Techsystems, and the Ashland, Inc., unit known as \"Hercules\" have been participating in the cleanup.\n", "In the event that a water tank or tanker is contaminated, the following steps should be taken to reclaim the tank or tanker, if it is structurally intact. Additionally, it is recommended that tanks in continuous use are cleaned every five years, and for seasonal use, annually.\n", "The Depot houses and operates a facility for the repair, restoration, and/or upgrade of infantry weapons such as the Beretta M9 pistol, M16 rifle, and M2 machine gun. Any firearm deemed unusable or obsolete is destroyed on the premises, the materials are reduced to unusable pieces and then sold for scrap to be melted down.\n", "Rescues of an entrapped victim usually entail building makeshift retaining walls in the grain around them with plywood, sheet metal, tarpaulins, snow fences or any other similar material available. Once that has been done, the next step is creating the equivalent of a cofferdam within the grain from which grain can then be removed by hand, shovel, grain vacuum or other extraction equipment. While some of these techniques have been used to retrieve engulfed victims or their bodies as well, in those cases it is also common to attempt to cut a hole in the side of the storage facility; this requires consulting an engineer to make sure it can be done without compromising the facility's structural integrity. There is also the possibility of a dust explosion, although none are known to have occurred yet during a rescue attempt.\n", "Recovery can be performed using manual winches or motor-assisted methods of recovery, using ground or vehicle-mounted recovery equipment (mostly winches and cranes), with the recovery of heavier vehicles such as tanks conducted by armoured wheel and track recovery vehicles (ARVs). During peacetime and in non-combat settings, various recovery vehicles can be used. In combat, under enemy fire, armies typically used armoured recovery vehicles, as the armour protects the crew from small arms fire and gives some protection from artillery and heavier fire. \n" ]
why does our body need uv to create vitamin d when uv exposure increases our risk of skin cancer?
UV light is an energy source, since humans are automatically exposed in varying degrees to this energy source we have evolved to make use of the "free" energy to create vitamin D. We have also evolved to darken the skin to prevent over exposure to UV which would increase risks of skin cancer. Only animals like naked mole rats don't have to concern themselves about exposure to some degree or other to UV light _URL_0_
[ "The sun's UV radiation is both a major cause of skin cancer and the best natural source of vitamin D. The risk of skin cancer from too much sun exposure needs to be balanced with maintaining adequate vitamin D levels. Vitamin D deficiency in Australia has also greatly increased, since sunblock also reduces vitamin D production in the skin. Although sunscreens could almost entirely block the solar-induced production of cutaneous previtamin D3 on theoretical grounds or if administered under strictly controlled conditions, in practice they have not been shown to do so. This is mainly due to inadequacies in their application to the skin and because users of sunscreen may also expose themselves to more sun than non-users.\n", "UV light causes the body to produce vitamin D (specifically, UVB), which is essential for life. The human body needs some UV radiation in order for one to maintain adequate vitamin D levels; however, excess exposure produces harmful effects that typically outweigh the benefits.\n", "Despite the importance of the sun to vitamin D synthesis, it is prudent to limit the exposure of skin to UV radiation from sunlight and from tanning beds. According to the National Toxicology Program Report on Carcinogens from the US Department of Health and Human Services, broad-spectrum UV radiation is a carcinogen whose DNA damage is thought to contribute to most of the estimated 1.5 million skin cancers and the 8,000 deaths due to metastatic melanoma that occur annually in the United States. The use of sunbeds is reported by the World Health Organization to be responsible for over 450,000 cases of non-melanoma skin cancer and over 10,000 cases of melanoma every year in the U.S., Europe, as well as Australia. Lifetime cumulative UV exposure to skin is also responsible for significant age-associated dryness, wrinkling, elastin and collagen damage, freckling, age spots and other cosmetic changes. The American Academy of Dermatology advises that photoprotective measures be taken, including the use of sunscreen, whenever one is exposed to the sun. Short-term over-exposure causes the pain and itching of sunburn, which in extreme cases can produce more-severe effects like blistering.\n", "Ultraviolet is also responsible for the formation of bone-strengthening vitamin D in most land vertebrates, including humans (specifically, UVB). The UV spectrum thus has effects both beneficial and harmful to human health.\n", "With the increase of vitamin D synthesis, there is a decreased incidence of conditions that are related to common vitamin D deficiency conditions of people with dark skin pigmentation living in environments of low UV radiation: rickets, osteoporosis, numerous cancer types (including colon and breast cancer), and immune system malfunctioning. Vitamin D promotes the production of cathelicidin, which helps to defend humans' bodies against fungal, bacterial, and viral infections, including flu. When exposed to UVB, the entire exposed area of body’s skin of a relatively light skinned person is able to produce between 10 - 20000 IU of vitamin D.\n", "The active UVB wavelengths are present in sunlight, and sufficient amounts of cholecalciferol can be produced with moderate exposure of the skin, depending on the strength of the sun. Time of day, season, and altitude affect the strength of the sun, and pollution, cloud cover or glass all reduce the amount of UVB exposure. Exposure of face, arms and legs, averaging 5–30 minutes twice per week, may be sufficient, but the darker the skin, and the weaker the sunlight, the more minutes of exposure are needed. Vitamin D overdose is impossible from UV exposure; the skin reaches an equilibrium where the vitamin degrades as fast as it is created.\n", "Sun protection is an important aspect of skin care. Though the sun is beneficial in order for the human body to get its daily dose of vitamin D, unprotected excessive sunlight can cause extreme damage to the skin. Ultraviolet (UVA and UVB) radiation in the sun's rays can cause sunburn in varying degrees, early ageing and increased risk of skin cancer. UV exposure can cause patches of uneven skin tone and dry out the skin.\n" ]
Is there any particular reason why so many people in the United States claim Cherokee ancestry?
Hello. I'm a mod over on /r/IndianCountry, the second largest and most active Native American subreddit. We recently constructed an FAQ [with a section that answers this specific question](_URL_1_) and links to several sources to back it up. I would like to note, though, that this is more of a social question with a historical context. In short, according to Gregory D. Smithers, associate professor of history at Virginia Commonwealth University and author of *The Cherokee Diaspora,* the Cherokee adopted a tradition of intermarriage after contact with the Europeans for several reasons, such as increasing diplomatic ties. Because this was actually encouraged by the Cherokee, it isn't *impossible* that those from the geographic location of traditional Cherokee territory have a Cherokee ancestor. However, another thing to note is that most people don't actually know and just say they have Cherokee in them because it is the family legend. The same professor mentioned above, Gregory D. Smithers, also states (bold is mine): > [**"But after their removal, the tribe came to be viewed more romantically,** especially in the antebellum South, where their determination to maintain their rights of self-government against the federal government took on new meaning. Throughout the South in the 1840s and 1850s, **large numbers of whites began claiming they were descended from a Cherokee great-grandmother.** That great-grandmother was often a “princess,” a not-inconsequential detail in a region obsessed with social status and suspicious of outsiders. By claiming a royal Cherokee ancestor, white Southerners were legitimating the antiquity of their native-born status as sons or daughters of the South, as well as establishing their determination to defend their rights against an aggressive federal government, as they imagined the Cherokees had done. These may have been self-serving historical delusions, but they have proven to be enduring."](_URL_0_) So the reality of things is that people like to claim something even if they don't have exact proof. One reason is the exotic factor of having native blood. That FAQ I linked touches on several other reasons. Point being, while there is some validity to the possibility of one possessing Cherokee blood or an ancestor, most cases are usually false.
[ "Gregory D. Smithers wrote, a large number of Americans belong in this category: \"In 2000, the federal census reported that 729,533 Americans self-identified as Cherokee. By 2010, that number increased, with the Census Bureau reporting that 819,105 Americans claimed at least one Cherokee ancestor.\" By contrast, as of 2012 there were only 330,716 enrolled Cherokee citizens (Cherokee Nation: 288,749; United Keetoowah Band: 14,300; Eastern Band: 14,667). \n", "Many tribes, especially those in the Eastern United States, are primarily made up of individuals with an unambiguous Native American identity, despite being predominantly of European ancestry. Point in case, more than 75% of those enrolled in the Cherokee Nation have less than one-quarter Cherokee blood and the current Principal Chief of the Cherokee Nation, Bill John Baker, is 1/32 Cherokee, amounting to about 3%.\n", "Many tribes, especially those in the Eastern United States, are primarily made up of individuals with an unambiguous Native American identity, despite being predominantly of European ancestry. More than 75% of those enrolled in the Cherokee Nation have less than one-quarter Cherokee blood, and the current Principal Chief of the Cherokee Nation, Bill John Baker, is 1/32 Cherokee, amounting to about 3%.\n", "Cherokee heritage groups are associations, societies and other organizations located primarily in the United States, which are made up of people who may have distant heritage from a Cherokee tribe, or who identify as having such ancestry. Usually such groups consist of persons who do not qualify for enrollment in any of the three, federally recognized, Cherokee tribes (The Cherokee Nation, The Eastern Band of Cherokee Indians, or The United Keetoowah Band of Cherokee Indians). A total of 819,105 Americans claimed Cherokee ancestry in the 2010 Census, more than any other named ancestral tribal group in the Census.\n", "There have also been cases of mixed-race Cherokee, of partial African ancestry, with as much as 1/4 Cherokee blood (equivalent to one grandparent being full-blood), but who were not listed as \"Cherokee by blood\" in the Dawes Roll because of having been classified only in the Cherokee Freedmen category. Thus such individuals lost their \"blood\" claim to Cherokee citizenship despite having satisfied the criterion of having a close Cherokee ancestor.\n", "BULLET::::- Cherokees - a Native American tribe indigenous to the Southeastern United States, whose official tribal organization is Cherokee Nation based in Oklahoma, United States, which has 800,000 members as of 2005, and the total ethnic population in the USA nearly doubled to 1.5 million by 2015. However, anthropological and genetic experts in Native American studies have argued that there could be over two million more Cherokee descendants scattered across North America (the largest number at 300-600,000 in California). The beginnings of the Cherokee diaspora was from their forced removal in the \"Trail of Tears\". Later, thousands of \"Americanized\" Cherokee farmers were forced to settle across the Americas (i.e. Canada, Cuba and South America-an estimated 90-100,000 descendants there ) as the result of the Dawes Act. In the 20th century, many Cherokees served in the U.S. Army during World War I, World War II, the Korean War and the Vietnam War. These soldiers left some descendants by intermarriage with \"war brides\" in Europe and east Asia. Some Cherokees and other American Indians might have emigrated to Europe and elsewhere through the British and Spanish empires. They make up the global Cherokee diaspora.\n", "The work of archaeologists, linguists and anthropologists has confirmed that the Cherokee were descended from prehistoric indigenous peoples of North America. Scholars have concluded that these prehistoric peoples originated from eastern Asia and migrated across the Bering Straits to North America more than 15,000 years ago. Although Payne's theory of Cherokee origins related to Biblical tribes has been replaced by the facts of Asian origin, his unpublished papers are useful to researchers as a rich source of information on the culture of the Cherokee in the early decades of the 19th century.\n" ]
how does the new iphone voice command system (siri) work?
I don't know the exact details, but I do know that any query made to the system goes to remote servers with the voice command. There, the technology across multiple servers parses your voice to determine exactly what you say (some say the original creators of the voice recognition technology, Nuance, [is still primarily responsible](_URL_1_)). After that, a completely separate process then parses the words you said to pull out key words and phrases to interpret what exactly you meant and how to resolve your request. Once that process knows what you want, then it's just a matter of calling the right sub-applications with the right arguments. Like setting a reminder at a certain time, calling a certain person, or looking up some query on [Wolfram Alpha](_URL_0_). The accuracy of the transcription capabilities and Siri's interpretation power is what's cost Apple several million dollars in research and purchases to get Siri where it is now.
[ "Apple added Voice Control to its family of iOS devices as a new feature of iPhone OS 3. The iPhone 4S, iPad 3, iPad Mini 1G, iPad Air, iPad Pro 1G, iPod Touch 5G and later, all come with a more advanced voice assistant called Siri. Voice Control can still be enabled through the Settings menu of newer devices. Siri is a user independent built-in speech recognition feature that allows a user to issue voice commands. With the assistance of Siri a user may issue commands like, send a text message, check the weather, set a reminder, find information, schedule meetings, send an email, find a contact, set an alarm, get directions, track your stocks, set a timer, and ask for examples of sample voice command queries. In addition, Siri works with Bluetooth and wired headphones.\n", "Voice assistants are interfaces that allow a user to complete an action simply by speaking a command. Introduced in October 2011, Apple’s Siri was one of the first voice assistants widely adopted. Siri allowed users of iPhone to get information and complete actions on their device simply by asking Siri.\n", "The introduced a new automated voice control system called Siri, that allows the user to give the iPhone commands, which it can execute and respond to. For example, iPhone commands such as \"What is the weather going to be like?\" will generate a response such as \"The weather is to be cloudy and rainy and drop to 54 degrees today.\" These commands can vary greatly and control almost every application of the phone. The commands given do not have to be specific and can be used with natural language. Siri can be accessed by holding down the home button for a short amount of time (compared to using the regular function). An impact of Siri, as shown by Apple video messages, is that it is much easier for people to use device functions while driving, exercising, or when they have their hands full. It also means people with trouble reading, seeing, or typing can access the phone more easily.\n", "BULLET::::- Speech recognition Google introduced voice input in Android 2.1 in 2009 and voice actions in 2.2 in 2010, with up to five languages (now around 40). Siri was introduced as a system-wide personal assistant on the iPhone 4S in 2011 and now supports nearly 20 languages. In both cases, the voice input is sent to central servers to perform general speech recognition and thus requires a network connection for more than simple commands.\n", "Interactive voice broadcasting (also referred to as interactive voice messaging) programs allow the call recipient to listen to the recorded message and interact with the system by pressing keys on the phone keypad. The system can detect which key is pressed and be programmed to interact and play various messages accordingly. This is a form of Interactive voice response (IVR).\n", "In Mac OS X 10.7 Lion and earlier, Apple's speech recognition was voice-command oriented only, i.e. not intended for dictation. It can be configured to listen for commands when a hot key is pressed, after being addressed with an activation phrase such as \"Computer\", or \"Macintosh\", or without prompt. A graphical status monitor, often in the form of an animated character, provides visual and textual feedback about listening status, available commands and actions. It can also communicate back with the user using speech synthesis.\n", "Voice Control was introduced as an exclusive feature of the iPhone 3GS and allows for the controlling of the phone and music features of the phone by voice. There are two ways to activate Voice Control: hold the Home button while in the home screen for a few seconds; or, change the effect of what double-clicking the home button does so it will activate Voice Control (only on iOS 3.x; on iOS 4 or later, double clicking the Home button opens the multitasking bar).\n" ]