What are the security or privacy issues with allowing users to forward email from our Google Apps account to their personal Gmail?

Question: But we have a new employee that would rather all his email in one inbox. I know he can forward the mail to his personal account, send mail using an alias so that it looks like it is coming from the company account, and that a simple bcc could put a copy of any replies back into his work account, but I feel like I should have some privacy concerns with this. Any input would be great!
Comment: Wasn't the answer you received on serverfault an hour ago good enough? http://serverfault.com/questions/441449/should-my-small-non-proft-allow-users-to-forward-email-from-our-google-apps-acco
Answer: The user sounds like the person who has a privacy concern, since a significant side effect of that action is that the company is prevented from access or control over his email account.
The company has operational concerns, as the email can't be recovered easily in the event of the employees resignation or incapacitation. The company does not really have a privacy concern, since even if there was no off-site forwarding, the user can still easily reveal email contents.
This is a management problem, not an IT problem. If your company policy forbids sending work email outside company control, then enforce the policy. If the policy does not cover that scenario, then is there really a problem? (If it is a problem, then write some policy!)
Comment: Local law may not allow you to read the user email, even if hosted in the company server. If the user leaved, you could still redirect back new email to somewhere else.
Answer: You should really use your own domain name, which is the same as business name. You can then use Google Mail to actually use it. On your website, you say stricte, that only authorized mail comes from the company domain name and not any other.
Anyone can copy email, but you can have control over your domain name, regardless you keep using gmail.


In The Winter Soldier, who did Peggy Carter say she married?

Question: When Steve Rogers visits Peggy Carter, she has a family photo on her nightstand and says that she married someone after Cap disappeared. Who did she marry?
Comment: With the greenlighting of the new Agent Carter series, we may finally get an answer to this.
Comment: It'd have been awesome if she had married Howard Stark. That's one reason I want to buy Disney.
Answer: The film doesn't state who she married, other than that it was a man that Rogers freed from Hydra on his last mission. In the comics she seems to have never married, so there isn't even any canon from there to draw upon.
Comment: Actually, in the Ultimate universe, she married Bucky Barnes, who survived World War 2 and aged naturally alongside her. Obviously, this cannot be true in the Cinematic universe.
Answer: TL;DR: Given what little we know, the most likely candidate is SSR agent Daniel Sousa.

The "Agent Carter" series was cancelled after two seasons. During its run, however, Peggy had often found herself attracted to fellow SSR agent Daniel Sousa, one of the few men to treat her as an equal and not a secretary. In the final moments of the last episode, S02E10 "Hollywood Ending", Carter and Sousa share a passionate kiss and begin laughing.
Sousa was engaged to his girlfriend Violet at the time, but previous scenes had made it seem like he was doing so only because Peggy hadn't returned his interest. Assuming that he began a relationship with Peggy instead, it is likely Sousa that she married. This is supported by the fact that her mystery husband was saved by Captain America, and Sousa once told her that Captain America was present at the battle where his leg was wounded.
Specifically, the relevant quote from Peggy in the Smithsonian interview was:

A blizzard had trapped half our battalion behind the German line.
Steve...Captain Rogers, he fought his way through a Hydra blockade
that had pinned down our allies for months. He saved over a thousand
men, including the man who would become my husband, as it turned out.
Even after he died, Steve was still changing my life.

Had we gotten a third season of the show, it's entirely possible that we'd find out Captain America is the one who saved Sousa after he was shot (he didn't know who had found him - merely that he woke up in a hospital with his leg gone). Some assumptions/speculation is needed here, but what little we know of Sousa and the mystery husband do fit with a little nudging.

Note: Avengers: Endgame writer Stephen McFeely recently stated that (spoilers for Endgame)

 Steve Rogers was always intended to be the mystery husband.

Personally, I don't see how this lines up with the evidence from previous movies & shows, but felt I should add it since it IS relevant to the original question.
Comment: It is later revealed in season 7 of Agents of SHIELD that Soussa became a member of Coulson's team as they time-travelled throughout SHIELD's past in an effort to stop the Chromicons taking over Earth. At the end of the season we see him travelling the galaxy alongside Daisy.
Answer: This is not addressed fully within the confines of The Winter Soldier, but the writers of the film, Christopher Markus and Stephen McFeely have recently specifically addressed this and the theories that ensued after Avengers Endgame.

Perhaps the most hotly debated Endgame plot point is the fate of Captain America, who travels back in time to live out his life with Peggy Carter (Hayley Atwell). 2014's Captain America: The Winter Soldier established that Peggy had a husband and two kids, and some fans have theorized that Steve Rogers secretly was this husband all along. Others have stated that Steve created an alternate timeline when he went back to live with Peggy, and somehow got back to the mainline MCU as an old man.
Markus and McFeely accept that different people will have different viewpoints on this topic. But, in their minds, Steve was Peggy's husband all along.
"It was always our intention that he was the father of those two children. But again, there are time travel loopholes for that," said McFeely.
Added Markus: "It does introduce the idea that there are two children who have somewhat super soldier DNA."

However, this does possibly contradict what the Russos have themselves said, saying that it would have been a branched/alternate reality that Steve had to have lived in if he went back to live with Peggy.

"If Cap were to go back into the past and live there, he would create a branched reality," Joe Russo told Entertainment Weekly. "The question then becomes, how is he back in this reality to give the shield away?"

So, which is correct? For now it sort of depends if you give more weight to the directors or the writers.
Answer: The husband is not named.
io9 speculates that this is because there is an Agent Carter series coming up and they don't want to spoil the surprise.

People have asked who Peggy Carter's husband is. The movie did not say, and if you look carefully, you'll notice her family pictures are conspicuously missing a husband. As mentioned above, there's talk of an Agent Carter TV series, and it's likely the producers don't want to give away who her love interest will be. If I had to guess, I would think they would pair her up with Jeff Mace, the third Captain America (there have been many). He was Cap for the late 40s and married the female secret agent from Cap's origin.

You can read more about the somewhat tortured backstory around that agent and marriage from the comics here.
Answer: I don't think it's going to be Gabriel Jones. My guess is the British guy from the Howling Commandoes. Just guessing though. The new guy on S.H.I.E.L.D. is Gabriel's grandson, and I think it would have come out if Peggy were his Grandmother. Also there were only two soldiers marked deceased when Cap was reviewing stuff on the Howling Commandoes and I'm betting one of those was her husband.
Comment: Actually the voice over (provided by Lt. Dan himself Gary Sinise) states that Bucky Barnes was the only Howling Commando to give his life in service during the war.  The archive footage of Peggy Carter states her husband was someone Captain Rogers rescued *after* he'd already formed the Howling Commandos so it couldn't be Gabriel Jones regardless.
Answer: At no time did it say he wasn't a howling commando and the best bet is Falsworth/Union Jack (the English guy with the Beret) while Gabe Jones IS a possibility I would be more inclined to think that Trip would be her grandson through a mixed marriage... I'd be interested to see if they went the older Luke Cage route and Jessica Jones being her daughter if it 70's set and as I expect Daredevil is more modern... after all they can't use the Spidey origin for her
You'll soon see when they announce casting for Agent Carter, if Falsworth is in it in any form then it's likely him.
Comment: She says in the archive footage that the man that would become her husband was rescued by captain Rogers during the winter months, *after* he'd already rescued Falsworth and formed the Howling Commandoes therefore it couldn't be him.


Shouldn't we have a "differences" tag? Is there a point in that?

Question: There seems to be a lot of questions that deal with the differences, pros and cons of using one expression compared to another one. Should all this questions be filed under the "differences" tag, or is that the wrong approach?
Answer: I'd think that questions discussing when to use one fragment over the other easily falls under grammar. Or even usage.
Comment: Yeah, I guess you're right.
Answer: Most such questions have been using the word-choices tag. I know because most of my questions are of this sort so far.
Answer: I ALMOST just created that tag prior to seeing this thread.  Yeah, I agree that word-choices is better.


Do Butch and Sundance really die at the end?

Question: I was always told that Butch Cassidy and the Sundance Kid ended with the title characters getting killed, but when I sat down to watch it, the film ended before any shooting could start. Are we to assume they get gunned down by the Bolivians?
Comment: I don't understand the answers and comments below. The film shows scores of gunmen lined up around Butch and Sundance. The latter have no idea of the hugeness of the numbers around them. They are overwhelmingly outnumbered. It's impossible to image the two of them shooting dozens of heavily armed people with guns trained, just awaiting their appearance. The freeze-frame is simply a technique to avoid showing their bodies torn to small bloody bits by the several-minutes-long barrage of gunfire.
Comment: So no, if you're asking about the film characters rather than the historical figures, I think that it's clear that Butch and Sundance are killed within two seconds of the moment at which the action freezes.
Comment: While it doesn't answer your question, you might be interested to see the page of the related [trope](http://tvtropes.org/pmwiki/pmwiki.php/Main/BolivianArmyEnding).
Answer: Butch Cassidy and the Sundance Kid were real outlaws. The movie is based on their actual lives. Below, I've copied what wikipedia says about their death and possible survival.
TL;DR
It is generally accepted that they were in fact killed in Bolivia, however there are theories that they survived. The ending of the movie showing the freeze frame is most likely done in an attempt to leave the question of their survival open ended, just as it is in real life.
Wikipedia Information

Death
The facts surrounding Butch Cassidy's death are uncertain. On November 3, 1908, near San Vicente in southern Bolivia, a courier for the Aramayo Franke and Cia Silver Mine was conveying his company's payroll, worth about 15,000 Bolivian pesos, by mule, when he was attacked and robbed by two masked American bandits believed to be Cassidy and Longabaugh (Sundance). The bandits then proceeded to the small mining town of San Vicente, where they lodged in a small boarding house owned by a local resident miner named Bonifacio Casasola.
Casasola became suspicious of his two foreign lodgers. A mule they had in their possession was from the Aramayo Mine, identifiable from the mine company's brand on the mule's left flank. Casasola left his house and notified a nearby telegraph officer who notified a small Bolivian Army cavalry unit stationed nearby, the Abaroa Regiment. The unit dispatched three soldiers, under the command of Captain Justo Concha, to San Vicente, where they notified the local authorities. On the evening of November 6, the lodging house was surrounded by the soldiers, the police chief, the local mayor and some of his officials, who intended to arrest the Aramayo robbers.
When the soldiers approached the house, the bandits opened fire, killing one of the soldiers and wounding another. A gunfight then ensued. At around 2 a.m., during a lull in the firing, the police and soldiers heard a man screaming from inside the house. Soon, a single shot was heard from inside the house, whereupon the screaming stopped. Minutes later, another shot was heard.
The standoff continued as locals kept the place surrounded until the next morning when, cautiously entering, the authorities found two dead bodies, both with numerous bullet wounds to the arms and legs. One of the men had a bullet wound in the forehead and the other had a bullet hole in the temple. The local police report speculated that, judging from the positions of the bodies, one bandit had probably shot his fatally wounded partner-in-crime to put him out of his misery, just before killing himself with his final bullet. In the following investigation by the Tupiza police, the bandits were identified as the men who robbed the Aramayo payroll transport, but the Bolivian authorities didn't know their real names, nor could they positively identify them.
The bodies were buried at the small San Vicente cemetery, near the grave of a German miner named Gustav Zimmer. Although attempts have been made to find their unmarked graves, notably by the American forensic anthropologist Clyde Snow and his researchers in 1991, no remains with DNA matching the living relatives of Cassidy and Longabaugh have yet been discovered.
In 2017 a new search was launched for the grave of Cassidy. It zeroed in on a mine outside Goodsprings, NV. DNA was taken from a nephew of his (via birth by Cassidy's Sister).The dig managed to find human remains, but did not match the DNA provided.

However... there are theories that they survived

Claims of survival
In his Annals of the Former World, John McPhee repeats a story told to geologist David Love in the 1930s by Love's family doctor, Francis Smith, M.D., when Love was a doctoral student. Smith stated that he had just seen Cassidy who told him that his face had been altered by a surgeon in Paris, and that he showed Smith a repaired bullet wound that Smith recognized as work he had previously done on Cassidy.
In a 1960 interview, Josie Bassett claimed that Cassidy came to visit her in the 1920s "after returning from South America," and that "Butch died in Johnnie, Nevada, about 15 years ago." Locals of Cassidy's hometown of Circleville, Utah claimed in an interview that Cassidy worked in Nevada until his death.
Western historian Charles Kelly closed the chapter "Is Butch Cassidy Dead?" in his 1938 book, The Outlaw Trail: A History of Butch Cassidy and His Wild Bunch, by observing that if Cassidy "is still alive, as these rumors claim, it seems exceedingly strange that he has not returned to Circleville, Utah, to visit his old father, Maximillian Parker, who died on July 28, 1938, at the age of 94 years." Kelly is thought to have interviewed Parker's father, but no known transcript of such an interview exists.
A second-season episode of the television series In Search of... (1978) casts doubts on Kelly's conclusions, examining the claims and possible evidence for Butch Cassidy's return to North America during the 1920s. In a series of interviews with residents of Baggs, Wyoming, a popular destination for the Wild Bunch during their raiding years, Cassidy was said to have visited for several days in 1924, driving a Ford Model T. Among the residents interviewed is the town sheriff, Ross Moore, who claims it was common knowledge locally that Cassidy did not die in South America, stating that his own grandmother saw Cassidy in 1924. In the episode, author John Rolfe Burroughs recounts several interviews he conducted in the 1950s supporting the claims of a 1924 visit to Baggs.
Notably, this episode also interviews Cassidy's sister, Lula Parker Betenson (died 1980), who states Cassidy returned to the family home in Circleville, Utah during this same period. Betenson states that Cassidy picked up his brother Mark Parker in a Ford automobile, then drove to the home of their father Maximillian Parker, where she also lived. She reports the elder Parker having said to her "I'll bet you don't know who this is. This is your brother Robert LeRoy." Betenson observes that her brother's life was full of regrets, particularly at having disappointed his mother so terribly, with Cassidy having reportedly stated "[A]ll I done [sic] is make a wreck of my life." Betenson claims that Cassidy lived out his years in "the Northwest" and died in 1937, and that the family had agreed not to disclose his final resting place since "they had chased him all his life, and now he's going to rest in peace." This story is also recounted by W.C. Jameson in Butch Cassidy: Beyond the Grave, referencing the 1975 book Betenson authored with Dora Flack, Butch Cassidy, My Brother.
Comment: @Vishwa: Surely the power of the original ending is that we _don't_ know what happened. Why ruin that by spelling it out in a sequel?
Comment: @Vishwa You might be interested in checking out the movie [Blackthorn](https://en.wikipedia.org/wiki/Blackthorn_(film)) then. That is a story looking at a potential view of Butch's life if they survived the shootout.
Comment: It'd be a great story for a great movie if someday we'll get to know what actually happened
Comment: no no not a sequel,I meant as a different movie. Could be how they survived and kept it a mystery (if they survived). It'd be a great thriller
Comment: @Vishwa: Not sure what that is if not a sequel
Comment: @Erik hey thanks.. didn't knew about that one. definitely gonna give it a shot.
Comment: @LightnessRacesinOrbit I mean completely different movie. no ties to this at all. Like Nolan's batman and DCEU batman. same characters and places and stuff, but no ties to each other
Comment: @Vishwa yes that's exactly what the Blackthorn movie is
Answer: There is every indication that they died. They were wounded and couldn't move quickly (a quick initial burst, sure.) But where are the horses to escape? How can the Bolivian army miss such easy targets with multiple volleys? Unless you favor magical thinking, they died. I know I was incredibly sad.
Why didn't the director show them being shot to pieces in the end? I always thought it was for empathetic reasons: it would be too painful to see the two protagonists lying there dead and full of bullets. It's not a slasher film or a war film, it's a Western. That's good enough for me. Bloody deaths isn't the point. It was "the journey" that was fun.
Another reason is that at the time of filming Butch Cassidy and the Sundance Kid, there were a number of directors influenced by French Film (which remains true today), and one very influential one was The 400 Blows where the ending is a freeze frame before a death.
Julian Cornell, who has a PhD in Film Studies and has taught at several universities, has this to say:

But primarily it ends in a freeze frame for thematic reasons. We don't want to see their defeat. The movie is consciously mythic, so a myth can't end in defeat. And if it does end in defeat, it has to be uplifting, or it has to affirm values in some way. There are plenty of war movies where everybody dies at the end, [and the end still affirms our values.] It's very unusual for mainstream big budget Hollywood film like Butch Cassidy to end with the main characters being dead, but you have the historical problem, which is that those guys died. It's not a war movie, so you can't have heroic defeat. Part of the point of the movie is to think about the mythology of the Western, the mythology of the Western characters, especially the mythology of masculinity in the West. Having that freeze frame so we don't see them die allows the myth to live on, even as the people, the human beings, die. Because that was the fate of the actual Butch and Sundance, who I'm sure were not quite as nice as they are in the movie and not quite as handsome as Redford and Newman... (Emphasis mine)

Butch Cassidy and The Sundance Kid are, as they say, larger than life.
Ask the Professor: Why does "Butch Cassidy and the Sundance Kid" end with a freeze frame?
Answer: The version I've seen has the video freeze after they run out and fire a shot or two towards the camera without showing what actually happens to them. But the audio goes on, indicating multiple volleys of gunfire, presumably aimed toward the two main characters.
Just before, we've seem dozens of soldiers take positions covering the building they are holed up in. Given that previously they've shot a number of officers while trying to steal horses for their getaway, it's highly unlikely the army would allow them to leave without shooting back.
So yes, there's a very strong indication that they are shot down and killed.
There's a clip of this version of the ending in youtube, right at the end:

Based on that presentation, I would say, yes, we are to assume they get gunned down by the Bolivians.
I also found another, longer clip, where we see the two protagonists shoot some officers, and the army lining up while they are holed in the building. In this one, the audio switches to the ending theme instead of the sounds of gunfire making the slim chance of a miraculous escape at least slightly open, even though still unlikely (in my opinion).
Comment: @Longshanks, I didn't say it was definitive proof. They could have survived, been sent to surgery, and then hanged or whatever. That would be more plausible than magically defeating a whole army, but I still find it unlikely. Based on the representation, and the sound of volleys like an execution squad, I would state that we are to assume they were gunned down and (subsequently) killed.
Comment: To be picky, is this definitive proof that they were killed? Isn't it entirely plausible that through sheer luck BC&SK nailed everyone with headshots, while everybody missed completely?
Answer: While I understand that the death of the real-life criminals Butch Cassidy and the Sundance Kid was never confirmed, I don't know that the circumstances surrounding their reported death was similar to the movie.  In the movie, with an entire army squad training their rifles on the only door of escape, two figures emerging from that door would surely be mowed down in short order . . . unless this were a Monty Python skit.
The director's choice to go with a freeze-frame ending could have been done to serve either or both of two purposes -- it leaves their death ambiguous as in their legend, and it avoids showing the carnage of the kill which would end the movie on a very dark note while the movie itself was light-hearted and the main characters, though criminals, were portrayed as likeable and sympathetic.
Note that a different director might have chosen a much different approach.  In the movie "Bonnie and Clyde", director Arthur Penn portrayed the infamous pair as much more sympathetic characters than history has generally known them but in the end he portrayed their death quite graphically and violently. Predictably, the effect was much different than the ending of "Butch Cassidy and the Sundance Kid."


Can you combine your Home Theater PC with your Home Server on the same box?

Question: A HTPC and a Home Server seem to have a lot of overlap.  Both are designed to be on (or on standby) all of the time.  Both have modest CPU requirements but should have large storage capacities.  Has anyone put Windows Media Center and Windows Home Server software on the same machine?
Answer: You may want to have a read through the following thread on WeGotServed about installing Media Center on a Windows Home Server:
Media Center 2005 on Windows Home Server
Answer:
Both are designed to be on (or on
  standby) all of the time. Both have
  modest CPU requirements but should
  have large storage capacities

I have a HTPC and WHS, and what I've quoted doesn't match up to my experience.  My HTPC does need a decent processor to play Blu-Ray and other 1080p content, but at the same time, it is not on all the time, and it doesn't have much disk wise.  So my machines don't have much overlap.
Partly, this is because I do not use the HTPC as a DVR.  If I did, I might have different needs, although a good argument could be made that the recording side of your DVR should be on your WHS.
Answer: For me personally I actually try to separate those functions as much as possible. I want a home theater pc to have as few responsibilities as possible (the most important being streaming video and recording video if I have a tuner installed), and I want my server to be the storage area, which will allow me to access all that data from multiple areas.
The reason I want an HTPC to do as little as possible is primarily because I do not want it to be a distraction in my living room (noise, flashing lights, etc.).
Answer: When I built my HTPC, I put a 500G drive in it for media - movies/videos, music and recorded TV library. I simply share the drive out on my network, and connect to it with client systems. I also play games on this system, so Home Server wouldn't be appropriate for me anyway.
The HTPC is running Windows Vista Home Premium, and runs Windows Media Center 24x7. Except when its running games of course.
Client 1 is a Macbook with iTunes that mounts the Music folder and iTunes is pointed at that for its library.
Client 2 is a Dell laptop running Windows 7 RC that mounts the entire shared drive to access Music, Movies, TV, with Windows Media Center.
I don't have money in the household budget to add a proper NAS device/system, but thats on my list, since 500G is starting to get cramped. When I do add a dedicated system for this purpose, it will be a Linux server running Samba to do the file sharing, and live in my basement. That's my preference, there's no reason you couldn't run a Windows Home Server for yourself.


Cleaning the screens of phones

Question: I don't have a liquid solution specially made to clean the screens of phones. So what's the substitute for that?
I can't use only a cloth since my screen has got stains.
So can I use sanitizer/ lens solution?
Or is there a better substitute?
I need a solution for a stain on my phone's screen.
Since for fingerprint marks I simply use a spectacles' cloth
Comment: Rubbing alcohol might be suitable for this purpose.
Answer: The safest method is to use a lint free cloth (preferably), moistened with soapy water.
Comment: Yes, I have.  It's probably the most conservative thing you could do.
Comment: Is that safe? Have you ever used it?
Answer: I always use Lens Cleaning Wipes, originally meant to clean my glasses, but they can also clean phones:

Using one once a week or so is enough in my case. I use the same wipe for glasses and phone, and it works as each wipe is pretty large.
Answer: It highly depends on the kind of dirt which is deposited on the screen.
For the most of the cases (no exceptions so far) I used 2 methods:

use some clean dry cotton cloth - dry cleaning; removes mostly dust and natural finger grease;
use some wet clean cotton cloth to wash stubborn spots, then apply the fist method for finishing.

I use smartphones for about 10 years, and the above always worked.
NOTE: I am careful and I do not "apply" on the screen unneeded garbage: greases, chocolates, paints...
Answer: I was supremely paranoid about how to clean my laptop screen and my smartphone at first so I spent an inordinate amount of time researching on the web and bought 'the #1 rated formula' spray for LCD, DLP, Plasma, cell phone screens+ from Fry's, I think.  It is called Klear Screen; just now found more info.  This is what I bought, but the bottle labeling has changed so it is not as informative (at least not at this site and same at Amazon; $9.95 at both sites now)
https://klearscreen.com/collections/klear-screen/products/ks-8
https://www.amazon.com/Klear-Screen-Refill-Bottle-KS-8/dp/B00013ZCMW/ref=pd_lpo_147_t_0/144-0642832-3170718?_encoding=UTF8&pd_rd_i=B00013ZCMW&pd_rd_r=03085b18-a137-4305-b4bf-3197b934b283&pd_rd_w=JL665&pd_rd_wg=qBEA8&pf_rd_p=16b28406-aa34-451d-8a2e-b3930ada000c&pf_rd_r=NAZM9WNXMVGDHFXR865A&psc=1&refRID=NAZM9WNXMVGDHFXR865A
but there is an abundance of info at their FAQs page
https://klearscreen.com/pages/frequently-asked-questions
Pix of my bottle:

Now for both, I often just breathe on them (with the screens off) and wipe with a soft washcloth.  For the smartphone, when I'm out and about, same thing only I wipe it on my slacks or blouse...depending on a number of quick considerations (which is cleaner and which don't I mind wiping my phone on at the time.  If at first I don't succeed, I repeat until clean. Not paranoid anymore, works just fine and I didn't die and my laptop and cell screens are unscathed as well.
Answer: My solution is a little different.  I only buy waterproof phones.  When I want to clean them, I follow this procedure (obviously don't try this if your phone isn't waterproof):

I put a tiny dot of gentle dishwashing detergent on the back of my hand.
I then tap the screen of the phone to the back of my hand to transfer an ever-so-small amount of the detergent to the screen's surface.
I run a little bit of water over the device and use my fingers to wipe all surfaces of the phone.
I rinse the phone for a couple seconds.
Tadaaa! The phone is now wonderfully clean.
I then use the rest of the dot of dishwashing detergent on the back of my hand to wash my hands.
Tadaaa! Clean hands too!

Although I cannot make any guarantees, I've personally done this for years without any issues.
This procedure the big added bonus of likely cleaning off bacteria and possibly even SARS-Co-V2 (the virus that causes COVID-19) from your phone.  If you want a better chance of removing any SARS-Co-V2 virion, perform steps 3 and 4 for at least 3 seconds each.  My understanding is that soap helps destroy the shell around SARS-Co-V2 virion after about 30 seconds of rubbing, rendering the remaining RNA harmless.

Cleaning the screens of phones


Choke at antenna and feedpoint?

Question: I'm planning on putting up a G5RV. From the ladder line I connect 5m coax to the shack; would it be worth doing a common mode current choke at both the antenna feedpoint and the coax feedpoint? (I read somewhere that it's recommended at the coax.)
Comment: possible duplicate of [Using a balun with a resonant dipole](http://ham.stackexchange.com/questions/538/using-a-balun-with-a-resonant-dipole)
Answer: Avoid common-mode sheath currents
Common-mode sheath currents on the coaxial feed line should be avoided because:

At the antenna feed point or the transition point of balanced line to coax, common-mode currents interfere with your radiation pattern.
In the shack, common-mode sheath currents will interfere with your  electronic equipment (RFI).

Origin of the common mode
Most often, the common mode on the coaxial feeding cable is a continuation of the standing wave that exists over the length of most antennas. (Aperiodic resistive antennas and leaky-wave antennas are notable exceptions.)
This standing wave, in turn, results from the abrupt change in conductivity $\sigma$ and/or permitivity $\epsilon_{r}$ that is encountered at the antenna ends. This is called the boundary condition in technical literature.
Being a standing wave implies that, for any given frequency, the common mode will show current minima every halve wavelength, starting from the antenna ends. Without a current balun and/or a sheath current choke, these current minima will repeat further down the coaxial feed line.
Optimal placement of a sheath current choke
A sheath current choke typically inserts only about 500Ω impedance in series with the sheath of the coaxial cable. This means that sheath current chokes are ineffective at places along the feed line where the common mode wave has a current minimum, because the common mode impedance there will be high (typically about 2kΩ). Sheath current chokes are most effective at common-mode current maxima.
Practical considerations

By all means, use a decently made, properly rated (frequency and power) current balun at your antenna feed point. This will be a first, broadband defence against common-mode sheath currents.
Current baluns tend to be less effective at lower frequencies because they produce their common-mode series impedance from inductance. Therefore, common-mode sheath current rejection may not be sufficient at the lower frequency bands. A sheath current choke may be placed at current maxima of the lowest frequency band, i.e.:

At $\frac{\lambda}{4}$ distance measured from the antenna ends, where $\lambda$ is the wavelength of the lowest frequency band, and/or
At odd multiples of this length, i.e. $\frac{3\lambda}{4}$, $\frac{5\lambda}{4}$, ...

This will normally also handle the common-mode wave rejection for the second lowest frequency band if this is a harmonic of the lowest.
Sheath current chokes close to the antenna feed point will help to preserve the radiation pattern of the antenna. Sheath current chokes closer to shack may help more against RFI.
If you can, connect the coax sheath to earth at both ends and place the coaxial cable on or below ground.
Comment: The G5RV antenna uses a length of ladder line (balanced) to the feed-point in order to match impedances. The ladder line can be fed with coax, but there's no coax at the feed-point.
Comment: I know the G5RV very well. In the explanation above, I mean by feed point the transition of balanced line to coaxial line. It is evident that on a balanced line you do not want to place a common mode choke because the main mode of transmission on a balanced line *is* the common mode.
Comment: I see what you're saying. I took "feed point" to mean the connection at the dipole. You're talking about putting a choke where the coax meets the ladder line.
Answer: A canonical answer is difficult, a lot depends on the antenna location and it's environment.  There is a ton of information on common mode chokes and baluns in the answer @Phil Frost linked above.  Some of these references suggest at the feed point is all you need, other say both the feed point and the shack entry point, still others say all of the above, plus points along the coax to break up potential 1/4 wave lengths that could pick up RF.
Five meters is pretty short run.  If it were me, I would put one at the feed point and see what I got.  If you have more ferrite laying around, add one at the shack end and measure the effects.
Answer: A G5RV uses the ladder-line portion of its feed to help match the impedance of the antenna. I'm skeptical about putting a choke at the connection between the ladder-line and the antenna (which is what the question refers to as the "antenna feed-point"). But try it, after you've used the antenna without it and have a sense of how well it operates. If it's not as good after adding the choke, remove it.

Choke at antenna and feedpoint?


Hanging Shelf With 79lb Drywall Anchor

Question: I have a shelf I want to hang up for my son to put up his gaming console and other expensive items. The studs in my wall don't line up with the shelves mounts. I have some drywall anchors left over from hanging pictures that are rated for 79 lbs in 1/2 inch thick drywall and the mounts require 4 screws, two sets of vertically in line. Can I safely mount the shelf with one side in studs and the other with the drywall anchors if I put the heavier items on the side in the stud? The overall weight of the shelf and all items going on it should weigh less than 79 lbs. The shelf is just over 45 inches long if this is relevant.

Comment: Sounds like you have done your math.. There is more than the weight to consider when mounting shelves though, there is also a pull factor. Any idea what those anchors are rated for that way and what do the backets and anchors look like. A picture would be good.
Comment: Presumably there is another stud in the middle but the shelf has no mounting holes there. You could get an angle bracket that would attach there to the stud and to the underside of the shelf. This would conflict with the minimalist design of the shelf, and would be asymmetric but would provide extra support. This could be added after installation as you  describe if you would start wondering about the strength of the original mounting. If you wanted to make the installation symmetrical, you could add a second under bracket using the same type of drywall anchor.
Comment: pictures are added. The wall anchors are Toggler Snapskru drywall anchors. Installation guide says allowable load = 1/4 Ultimate load and says things like shelves greatly reduce allowable load. Shelf will hang about 11 inches off the wall
Comment: see my answer to this question. [How do I properly mount hardware to a wall covered in AirStone](http://diy.stackexchange.com/questions/109957/how-do-i-properly-mount-hardware-to-a-wall-covered-in-airstone/109973#109973)
Comment: So there are 4 holes for screws to attach this stylish shelf; they look like they are (only) ~4" apart vertically. In your house one pair will be screwed into a stud and the other pair into drywall. Given that you plan to put the heavier items on the end supported by the stud, this sounds to me like it would be strong enough, and if you install it this way you could test it by hanging a weight on it and looking for deflection.
Answer: No those anchors will NOT be sufficient to hold up THAT shelf. Those shelf brackets are too short and there will be a LARGE pulling force on the upper screw.
Assuming from the image that's a 10 inch shelf and the screws at 2 inches apart, hanging 79lbs on the edge of the shelf will get you a whopping

395 LBS of pull force on the top screw.

When you look at that picture and look at the metal end, does it remind you of any tool that is sitting on top of your toolbox? A claw-hammer perhaps?
You may get away with the type of anchor that mushrooms out behind the wall as shown below. Remembering to buy the size that matches your drywall thickness. But I do NOT recommend these either for that shelf.

With the shortness of that bracket, I'd still be concerned that was not enough to hold up much weight. If those fail, it is going to pull down a rather large piece of drywall too.
Personally I would be inclined to add a backer board out of a nice piece of wood, the wider the better, using one of the following two methods.
Option 1: Outboard screws... Board cut to fit to next stud width. In your case 3 (Don't forget to add a 2x4 width.). Mount board to studs then centre shelf on the wood.

Option 2.: Inboard Screws. Cut board to about 1 inch wider than the shelf. Then centre the board on the studs as shown in the image below.

Which method is best?
Use the method that gets the screws in the wood closest to the screws in the brackets. However, be aware that with the "inboard screws" method, the end of the board will tend to pull away from the wall if the screws are too far away from the brackets.
If the boards spans more than two studs, I'd add another couple of screws  at each stud.
If you, or the Mrs, don't like the visible screws, use one of the many capping or plugging methods.
Comment: I would also use washers in that backing wood. That will spread the load around a little bit more, and reduce the risk that screw heads will press into the wood and cause the shelf to loosen even just a little bit.
Comment: Larger toggle bolts (butterfly anchors) may work as well. They go pretty large.
Comment: Larger toggle bolts will *not* work. The OP's proposed arrangement is likely to tear the drywall right off the wall.
Answer: Instead of using drywall anchors, another option is to cut open the wall and add framing with 2x dimensional lumber to place studs exactly where you need them.
For this you require the following materials:

Stud locator (or you knuckles)
Drywall saw
2x4 or 2x6 lumber, the same as the stud sizes.
Framing nails
Drywall
Drywall tape and mud
Drywall screws
Trowel or drywall knife
Framing screws or lagbolts
Pencil
Measuring tape
Matching wall paint
A beer

Here's what you do:

Figure out where on your wall you'd like to place the shelf. Locate the closest studs that fall outside the edge of the shelf. Mark an area around the shelf that includes the studs that you will cut out from the drywall
Cut the drywall where you marked. Be careful that you do not cut: studs, plumbing, electric, anything else hidden back there.
Cut the lumber to length so that it runs perpendicular to the studs and runs along where the screw holes in the shelf will go. Judging by your picture you may need to run two pieces lengthwise to catch the top and bottom holes.
Nail the lumber to the studs. You will need to toenail or if you cut the wall past the studs you can nail through the studs. Make sure everything is level!
Cut a piece of drywall that fits in the hole. Screw it in place using the studs and your new bracing, but of course make sure not to place drywall screws where the screw holes in the shelf will land
Tape and mud the drywall patch following the instructions on the mud
Paint the wall to match
Screw your shelf into the studs using lag bolts
Comment: Any reason you _need_ a new piece of drywall? I realize a new piece allows a margin of paper for gluing the perimeter, but couldn't you reuse what you cut out, securing with screws, cleaning out the cuts, priming (to prevent paper swelling),  following with tape, mud and more paint?
Comment: The new drywall is not necessarily needed if you successfully manage to remove the existing drywall without damaging it and it is in a condition that makes it reusable.

Hanging Shelf With 79lb Drywall Anchor


sqlite and sqlserver with dapper

Question: I'm using dapper with SQL Server, but using Sqlite for some in memory tests for my unit tests.
I have a class as follows
public class Test
{
  public int ID {get;set;}
  public string Name
}

If I query using dapper with a SQL Server connection, it works fine.
If I query using dapper with a SQLite connection, I get a type cast error.  Basically I need to change the type of ID to be a long, rather than int.
I don't want to change my schema in SQL Server, so I'm wondering if there is a workaround to the scenario.  I've tried creating and ID class with implicit casts to long/int, but this also fails, and I'm out of ideas!
Comment: how did you define the sqlite table ?
Answer: Try to create the sqlite table specifying the Lenght for INTEGER to 4 bytes. maybe this question would help too: What is the difference between SQLite integer data types like int, integer, bigint, etc.?
Answer: This revolves around the fact that Dapper uses the GetValue method on the IDataRecord interface.  The concrete class in the System.Data.SqlLite namespace probably map values differently than that of System.Data.SqlClient.
As @FelicePollano pointed out try changing the structure of the SQLLite table and see if that causes the concrete class in System.Data.SqlLite to map it differently.
Another option is to roll your own mapping using the FastExpando object Dapper returns and force it to convert the value to a Int.
IEnumerable<dynamic> results = Conn.Query("Select ID from SomeTable");

var testValue = new Test
{
    ID = Convert.ToInt32(Results[0].ID.ToString())
};

Not really a big fan of it because it could require a lot of code changes, but it can work.
Please note: That example code can throw a exception if the ID column is not an integer.  You can use TryParse, but for the sake of brevity I didn't include it.

sqlite and sqlserver with dapper


How can I immigrate to Germany or Canada from Iran?

Question: I own a bachelor's degree in Software Engineering, and currently work as an IT expert in a private company in Iran. Considering that my dear country, Iran, is very isolated right now (and as it seems, it will remain under crippling sanctions for the foreseeable future), how can I get out of Iran and immigrate to Europe (Germany, Sweden, etc) or Canada? I'm 27, single and I have an intermediate level of English. Where should I start and what should I do?
Comment: What research have you done up to now?
Comment: Your English is clearly far better than 'Intermediate'.... While this site is great for helping with specific scenarios and technical questions, broad questions like this are impossible to answer as there are simply an infinite number of possibilities.
Comment: It is unclear what is your motivation to immigrate to Europe (btw., the countries in Europe are really different) or Canada. What do you want to achieve with moving to another country? Is the isolation of your motherland the only condition you are not satisfied with? How does these isolation and sanctions affect you personally now? Are you not allowed to travel or what? Why do you write "my dear country" in a sarcastic manner, do you think other countries are much better than your motherland (does not you insult yourself by writing something like this)?
Answer: If you have outstanding skills and hold a very strong job profile, you would be able to apply for a job and get a work visa in European countries and after few years receive a PR status.
If you also considering Canada, gain a Master degree and an upper band IELTS test result then go for Express Entry.
Either way, you need to be a good asset for the destination country. If you are not that good, don't go! since you are unlikely to find a proper job and a good living (comparing what you may have in Iran).
Some people seek asylem or refugee status based on lies. This is a fast way to get there BUT your problems starts immediately. You can't work, own anything and simply live!!!! no one will respect you there as you are being seen as a burden. Besides, developed countries has made this route harder to prevent possible system abuse, and by hard I mean you will experience very bad conditions in refugee camps and even after your case being accepted you are still looked as a burden!  Please don't select this route. What ever situation you are experiencing in Iran is thousands times better than that.
And quick side note, Those who have migrated tend to falsly showing their condition much better than it really is. Don't fall with that.
Still, if you are determent, invest in your self and remember there is no easy way to get your life a lot better without efforts and diligence.


Is it real to install any IDE on elementary OS, like NetBeans, Code:Blocks, etc

Question: I'm about to choose this Unix-based system for my everyday tasks. By the way, I've started to learn basics of programming, so this is gonna be cool to use this smooth, stylish system to browse internet and study.
Answer: There are many IDEs available for elementary OS. I personally use Android Studio, IntelliJ IDEA, Atom, VS Code, Scratch, and Gnome Builder. Bottomline: Whatever language you are working in or whatever your development needs are, you're covered.


Diskpart Access Denied

Question: I just can't resize my partition in Windows Vista. I've tried the partition manager, but I get an error: Logical Disk Manager, Access Denied. So I used diskpart.exe, but when I tried to shrink my partition, I got access denied again! Booting in "Safe Mode with Command Prompt" doesn't work, nor does activating the hidden administrator account. How can I shrink my partition?
Comment: You can try reboot the PC and lunch diskpart as administrator
Answer: I would recommend not using the built in Windows tool for this task, even if you were to resolve the Access Denied problem.  Unmovable files such as the page file, etc, usually prevent you shrinking the partition down to the size you actually want anyway.
A way around this is to use a free tool called GParted.  Download, burn to a CD and boot into it.  You will get a familiar interface which will allow you to play with your partitions.  As it runs outside Windows, there no Access Denied errors and nothing stopping the unmovable files from being moved.
Answer: You can use GParted or Paragon Partition Manager Express to resize partitions.
Just some comments if you do solve your problem:
Don't erase partitions that you don't recognize, since one might be the restore partition pre-created by your computer manufacturer. Don't also change the order of partitions on the disk. If you create a new partition, make sure it's after all existing partitions. There's also a limit of 4 partitions per hard disk.
Beware: Repartitioning the C drive may cause the computer to become unbootable. Take your backups! It's advised to take an image copy of your C drive, to avoid re-installing Windows. Remember that you can't restore a disk partition image into a smaller partition.
The safest way to resize disks in Vista is by using the in-built Disk Management, which will show you the lowest possible disk size. You can't go below this value unless you defragment the disk so as to move files at the end of the disk to its beginning. But first turn off system restore points and the page-file and clear the recycle bin. Some good free defragmenters are Defraggler and Auslogics Disk Defrag.
If this didn't help as much as you hoped, this means that some unmovable Windows system files were unhelpfully allocated at the end of the disk. Most defragmenters won't touch them, and when I tried one that could, it ended by destroying my hard disk, so I've no recommendation for you. If at this point you're still fully decided on shrinking C, you'll need to re-reinstall windows.
EDIT: At least in one case such a problem was resolved by consolidating empty disk space to the end of the physical disk, probably a bug in diskpart.
Answer: Your need to logon with Administrator privilege or select \windows\system32\diskmgmt.msc right-click and "Run as administrator".

Diskpart Access Denied


Cant re-install Google Web Toolkit using Eclipse plugin

Question: I installed and updated Google Plugin for Eclipse 3.7 a few weeks ago. It installed GWT as well as other things. I was able to compile a Google App.  I did several things on Eclipse today and now GWT is gone.  I look at Preference-->Google-->Web Toolkit; the list is empty.  I ran plugin update, it keep saying GWT is already installed and refuse to update/re-install.  I uninstall GWT explicitly and run plugin update; it update without complaint.  But the Preference-->Google-->Web Toolkit; the list is still empty!
How do I force plugin to populate the SDK info in Preference-->Google-->Web Toolkit?
There is actually an "Add" button to configure SDK.  But I dont know the installation directory of GWT.  Where does Eclipse plugin save the GWT?
Seems Eclipse keep track of the installation of GWT SDK in two different place?
My GWT SDK database seems corrupted, and Eclipse plugin seems rely on its own private data base of the status of installation of GWT SDK?
Can anyone please help?
Answer: I think that what you are referring is not the plugin but the SDK.
Download the SDK unzip it then add it preferences->Google->Web Toolkit.
The link to to download the SDK is: http://code.google.com/p/google-web-toolkit/


How should a new brick wall tie into an existing wall?

Question: When building a new brick outside, block inside extension, where it joins an existing brick wall. How should the new wall be tied into the old. ie should the outside brick AND the inside block be tied to existing or is brick only with block tied to new brick via cavity fixings.?
Comment: There's two aspects of the answer: aesthetic tie-in and structural-integrity tie-in. Are you asking primarily about one, or both?
Answer: If the new wall joins in the middle of the existing wall (eg making a T shape), you can use either wall starters (eg such as these ) fixed to the existing wall to accept both the inner and outer leaf of the wall or you can use frame cramps (eg such as these ) fixed individually for both leaves of the wall.
If the new wall continues along the same line as the old wall (ie it joins it at what is presently a corner), you would typically cut out the "half" bricks (ie every other course) to allow the extension wall to tie into the existing wall such that the bonding pattern matches and continues in the new wall. You would then use wall ties or starters for the inner leaf.
In both cases you should cut right though the outer leaf of the brickwork in the line of the cavity and insert a damp course (DPC) to prevent mositure tracking across and appearing as damp in the corner of the new extension. Ideally, you would cut out sufficient to allow an insualted DPC to be used to also prevent a "cold bridge" along the existing wall.
As you have correctly identified, you will also need cavity ties in the new wall.


Can some stars not emit any energy in the visible spectrum?

Question: Stars convert mass into energy. Even converting the slightest mass into energy is immense because the speed of light is so great and $E = mc^2$. This means that stars have to emit large amounts of energy. So can they emit so much energy in a form of electromagnetic radiation that is not visible light? Resulting in a star that cannot be detected using our senses(+ a telescope). If so what problems could this star pose?
Comment: Have you looked at a star recently?
Answer:
Light that is not light

That's meaningless.  All light is electromagnetic radiation.  A finite part of the infinitely large range of the electromagnetic spectrum is visible light.  So you should talk about EM radiation and to discuss the visible spectrum just say visible spectrum.
Stars emit lots of energy at frequencies that are outside the visible range.

Dark Matter

Dark matter does not mean that it's just not radiating in the visible part of the spectrum.  It means it's not radiating in any part of the EM spectrum much.  If dark matter exists (and that's not certain) it won't interact with most matter much at all.
If dark matter were in star-like objects, it sounds very unlikely that there would not be any EM radiation as a result of the interactions that would result in a star-like object.  We'd detect it if it were there.  So I don't think that's likely.
Comment: The [plank length](https://en.wikipedia.org/wiki/Planck_length) isn't a hard limit in physics.  It's constant you can define which seem representative of the order of magnitude at which our existing theories stop working well.  In principle we hit measurement problems as a limit at this range, but then a theory "beyond" current QFT might change that idea.  Nobel prize for the first completely correct answer to what that theory is.
Comment: Is the EM spectrum "infinitely large"? I'd have thought it was limited in both directions.
Comment: Limited in one direction, but infinitely large, at least in principle.  Given an assumption of a finite universe that "infinite" lacks meaning.  And as wavelength grows larger making a measurement of it becomes less practical, even perhaps impossible.  As as frequency increases so does energy, and that presumably has a practical limit as well.  But in the abstract theoretical sense, an infinite range of values.
Comment: In theory, extremely long wavelengths are limited only by the size of the universe, but this radiation would have an extremely low energy, reducing asymptotically with wavelength - so would there be a quantum limit? In the other direction, are extremely short wavelengths limited by the Planck length, or do we just say "yes it could be smaller but we don't know how to describe this"?
Answer: You mix up a lot of things in your assumptions.

Stars convert mass into energy.
$E = mc^2$

The way stars produce energy is nuclear fusion. One main process there is the tripple-alpha process, which releases a net energy of about $E \sim 7$ MeV (that is not that much)

So can they emit so much energy in a form of light that is not light?

By light you are speaking of visible light. But radiation goes over all frequencies and wavelength, not just the one the human eye can see (which is roughly $\lambda = 400 - 700$ nm).
Here you want to check out the theory behind black body radiation, which describes - more or less - the intensity of the light at different wavelengths/frequencies at a given temperature.
For an overwiev, look at this figure. The sun's surface temperature ist about 6000 Kelvin, so you can infer, that it's radiation maximum is in the range, which the human eye would perceive as green.
Answer:
So can they emit so much energy in a form of light that is not light? Resulting in a star that cannot be detected using our senses(+ a telescope).

Presumably by "light that is not light" you mean light outside of the visible spectrum. This is why the fields of gamma ray astronomy, x-ray astronomy, ultraviolet astronomy, infrared astronomy, microwave astronomy, and radio astronomy exist. Astronomy is not limited to the visible spectrum, and there's lots of interesting stuff to "see" from using a telescope that senses light outside of the visible spectrum.
The hottest of stars emit most of their radiation as x-rays and ultraviolet light, but they also emit a lot of visible light. These very hot stars are quite large, short-lived, and very rare. The coolest of stars emit most of their radiation in the infrared, but they also emit some light in the visible range. These very cool stars are quite small, very long-lived, and extremely numerous. Their cool temperatures makes them rather hard to see, even in the infrared.

If so what problems could this star pose? Could this be dark matter?

The very smallest of those cool stars, along with black holes, cool neutron stars, brown dwarfs, and rogue planets collectively form a set of candidates for dark matter called "massive astrophysical compact halo objects", or MACHOs for short. However, theoretical calculations along with observations says that MACHOs can account for at most about 20% of dark matter.
Answer: I will just point out two things that haven't really been discussed above.
Firstly, stars generally fall into two categories. 'Hot stars' are those that convert mass into energy by nuclear fusion, and 'cold stars' are those that have ended the nuclear burning phase, e.g. white dwarfs and neutron stars. These still have a finite temperature and therefore will emit radiation. As you can imagine, however, since they no longer produce energy, eventually they will become actually cold, hence not radiating (or radiating very little).
The second point to note is that radiations from stars far away are redshifted as they reach us, and they are likely to be attenuated by dust. Therefore, even if the radiation itself when emitted is visible light, by the time it gets to us it may no longer be. However, there are still many other different spectroscopic techniques that will allow us to 'see' it.
Comment: WDs and NSs are far from cold, having temperatures of tens, and millions, of Kelvins, respectively. Also, redshift and reddening are sort of beside the point here.
Comment: @pela This is why I said "eventually they will become actually cold". The names "hot stars" and "cold stars" have been defined clearly in my answer; they do not refer to the temperatures, though I admit the terminology may somewhat be misleading. As for redshift - the question asks about detection, so I would not say it is irrelevant. I would admit that reddening is probably slightly beside the point.
Comment: Okay, sorry, I misunderstood.


Can I book a different accommodation after receiving my US visa?

Question: I applied for a US visa and got it. During the application, I reserved some room in a hotel just to get a phone number and an address that I could use to fill the DS-160 form. After getting the visa I could find cheaper accommodation options in Airbnb and booked it after canceling my hotel room. Would that be a problem if the immigration officer asks where I will stay while entering the US?
Comment: I really doubt that this matters at all. As long as the address you give when you talk to him is correct, and there was no significant visa-related reason for the previous address (like someone living there agreed on paying your expenses), they wouldn't care which hotel you choose. I am not an immigration officer though, therefore this is not an 'answer', it just comes from a lot of experience.
Comment: The only situation where I can think this is likely to be a problem is if the change dramatically alters the purpose of your trip from when you applied for the visa. If your single entry visa was issued on the basis of a trip to attend a medical conference in New York and you now want to stay at a cabin in the woods in California, that could lead to some issues. But a different hotel in the same city should be just fine.
Answer: Changing your hotel accommodations is no problem.
You only need to write the street address of your new accommodations on your landing card, which you will fill out on the plane and give to US immigration and customs officers. Make sure that you have the correct street address before you depart. (You'll also need it to give to your taxi driver.)
Answer: The CBP doesn't have immediate access to what you wrote in the DS-160, because it's not relevant. A visa was issued, and all you need to do is fill out the blue form correctly (putting the new address on it) and answer the officer's questions truthfully.
Like Michael Hampton wrote, as long as your planned activities remain consistent with your visa, you'll be fine if otherwise deemed admissible by the officer you get.


What age to stop son from sleeping in same bed as Mother?

Question: A 5 year old boy has been sleeping at night in the same bed as his single mother for basically his whole life, although he has his own bedroom and his own bed.  They go to sleep together at the boy's bedtime and the mom gets up after the child is asleep (sometimes).  Is a boy this age sleeping with his mom common?  At what age should it stop? (Yes, this is a relative.)
Answer: There is exactly one age when this should stop:
When one of the individuals concerned is no longer happy with the sleeping arrangements.

Assuming that your real question is somewhere along the lines of "Is this going to mess with the development of the five yo., sexually or otherwise?" - No, he will be fine.
Comment: Own experience, friends and the fact that many cultures world wide practise co-sleeping differently than we from western cultures are used to. The proponents of co-sleeping would add to that that some children need the closeness - google, if you like, you will find sources that explain better than I can. My kids are older than the child in question and still come to our bed when they are (emotionally) stressed, slightly sick or similar.
Comment: Why did someone edit out the reference provided by Stephie and the comment on that reference that I wrote?  The reference was relevant and my  comment on it focused on the details of the study.
Comment: I think most of the time this behavior extinguises itself before it's an issue, but, it sometimes does not. I'm not anti-cosleeping. My own kids slept in bed with us while breastfeeding and for a while after so I do understand the benefit. I just also see the necessity to end it at some point, which is what the OP is asking for. It isnt a numerical age, IMO, it's when it crosses the line into emotional codependency.
Comment: My comment is based on experience only. My brother slept in bed with my parents, and then with my mom when they divorced. He did it until well into highschool, when his counselor finally had to to tell my mom not to allow it because it WAS messing with his development. Even into his twenties, he would sleep with her when he was ill or depressed. Believe me, there is a point where even if both are happy, it still shouldn't go on. My bro is NOT a happy, well adjusted adult, and his relationship w/my mom is a BIG part of it.
Comment: sometimes kids suffer from separation anxiety. My paediatrician's advice was "_its more common than you think, they grow out of it and I really advise you not to force the issue. You will make things much worse_".
Comment: On what do you base your strong closing statement?
Comment: Thanks for using the term cosleeping. I havd not heard of it.  A quick web search turned up a few sites that say that cosleeping until age 5 is fine, and no sites that talk about cosleeping after that age.
Answer: I can reference my own experience here:
Our 5-year sleeps on our bed. He goes to be in his own bed, and gets up and moved to our bed in the middle of the night. He is turning 5 shortly, and recently he has had nights where he doesn't go to our bed. Most nights he sleeps in our bed.
We made the decision to neither encourage nor discourage co-sleeping with our kids. We put them to bed in their own beds, but if they want to move into our bed they can. There are many reason for this, and many of them are practical.
I have noticed that among other parents of toddlers and pre-schoolers, IF you practice co-sleeping, many kids are still in their parents bed at this age.
Answer: My husband and I did a lot of research a few years ago. We now have an 8 yr old boy and 5 yr old girl. We had the hardest time with our boy because when he was at his real mother's house, he always slept with his mother or one of his older brothers, being the youngest of 5 boys there. I initially had a hard time with this being my relationship with his dad started the same time he was born. Then, when my daughter was born, I breastfed for a while and we researched more about cosleeping for fear of smothering our newborn. All the research I remember showed that, generally, there is no longer term damage to the child psychologically. In many indigenous communities in places like Malaysia, entire families sleep together, including grandparents. But the one thing that always stuck out to me was my husband saying, "Do you really think either of them are still going to want to sleep with us when they're teenagers? Enjoy it while you can." Hope this helps.
Comment: that's good advice. My child is almost ten and starting to talk about sleeping in her own bed. The paed said "it will come, be patient" and he's been right about absolutely everything so far.
Answer: I believe a lot depends on the boy, and hopefully the mother knows her son.  At about the same age as this boy, and for a couple of years after I tried my best to see my mother in various states of undress, and would try to find ways to see her naked.  At times I would crawl into bed with her when my dad got up early, and then would get as close to her as possible and "accidently" touch her woman parts.  On the other hand, my brother never had any interest in her what so ever even though they were much closer emotionally than mom and I were.  So, that's why I say it depends a lot on the son and what the mother knows about him.  No one size fits all.  And further, no I did not grow up weird, and I wasn't a terror to my girlfriends nor to my own daughters.
Comment: I'm not going to judge, but I think co-sleeping is very rarely a sexual thing.
Comment: Extracted the following into it's own comment so it can be deleted separately from my other comment (because this one is basically a meta rant): I think the reason for the downvotes is that the answer disagrees with the stance that children are asexual beings, which seems to be the consensus on this site. I wish we would not treat minority positions as if they're toxic; they might not be applicable in most cases, but they might still offer some insights.
Comment: It sadens me that this answer attracts downvotes. I don't think it's trolling; it seems to me it makes a serious effort at answering. I agree with forest that co-sleeping is very rarely something sexual, and I do think Stephie's answer is more helpful, but this answer offers anecdotal evidence that there are cases where we're not dealing with an asexual situation, and I find that useful to know. Also, it expands a bit on the "don't worry, he'll be fine" part of Stephie's answer, not necessarily contradicting it, but offering another point of view.
Comment: @Pascal I downvoted it myself not because I think that children are _intrinsically_ asexual beings (I don't), but because it doesn't answer the question as to _what age_ to stop co-sleeping (or at least, only the first sentence does). I wouldn't have downvoted if the question was asking why co-sleeping is a thing. I can't explain why others may have downvoted, but that was at least my reason.
Comment: @forest the question is not going to get an answer as asked. It depends entirely on the child - puberty is probably the only "firm" answer but even that is highly variable. I'm upvoting him/her as he/she gave a rational answer to an impossible question.
Comment: @bigbadmouse That's a good point. I would remove my downvote but I can't unless an edit occurs.
Comment: @forest - there you go. Just awaiting peer review.Its a good enough answer and deserves your up-vote.
Answer: I think it really depends on the situation. If the mom and kid are by themselves (no father present) then it probably makes more sense that they would sleep in the same bed. I'm sure there will come a day fairly soon where that will no longer be the case. I really don't think its a big deal at this point in time.
As parents of two boys(6 & 4), my wife and I tuck them into bed every night. Some nights (maybe once every 2-3 weeks) one of the boys ends up in our bedroom for a variety of reasons: cold/hot, couldn't sleep, scared of some noise or the weather, etc. When that happens, we usually let them stay for a little while until they fall asleep and then tuck them back in their own bed.
I will also add that when our boys do come into our bed, they almost always sleep on my wife's side of the bed.


RRAS on 2008R2 with routing and NAT

Question: I am looking for advise to set up a Windows 2008R2 based router with NAT functionality. My current network consists of a few subnets (reserved + real ip addresses), e.g. 10.20.30.0/24, 10.20.40.0/24 and 188.8.131.52/24. What I want to do is to connect all subnets so that they can communicate with each other while providing NAT to those reserved ip addresses (10.x.x.x) for Internet surfing. On the other hand, those with real ip addresses (123.123.123.x) should go online without the NAT. What should I do?
Answer: It seems that Windows RRAS cannot do what I want, instead those real ip addresses will be connected via nat on RRAS. I give up finally and have a CentOS setup providing the routing/nat for the network.

RRAS on 2008R2 with routing and NAT


i7 Memory Controller Limits

Question: Intel's specs say that the 2670QM's memory controller supports 16GB of memory, but they add the qualifier that it is dependent on memory type.  Am I correct in assuming that 16 is the highest possible maximum, and not the guaranteed maximum?  What happens if I install more than 16?  I'm seeing reports of people installing 48GB on consumer i7 setups which are specced at 24GB and having them work, so I'm somewhat confused.
Answer:
Am I correct in assuming that 16 is the highest possible maximum, and not the guaranteed maximum?

It is the maximum amount of memory that Intel guarantees will work.
There is a lot of speculation why Intel hasn't validated larger memory configurations. One theory is that the memory wasn't available at the time they did the validation. Another theory is that Intel wants to segment the market and direct people with greater needs to more expensive products.
Another theory is that these implementations don't quite meet Intel's strict criteria for stability, making using more memory somewhat akin to overclocking. This is somewhat plausible because Intel's testing makes the worst possible assumptions for every possible parameter (temperature just inside limits, voltage just inside spec, noise the most allowed, everything right at the edges of tolerances, and so on) so you can have configurations that fail Intel's testing but are 100% rock solid.
Answer: Just looking at the current lineup of Alienware laptops, you can configure successfully with Windows 7 Ultimate 64bit, 32GB RAM, and the 2670QM processor. Other configurations like Windows 7 Home 64bit, 32GB RAM and the 2670QM processor returns an error. Therefore, since it looks like they are doing compatibility checking, I would assume to answer your question that it is possible.
Answer: Sandy Bridge can do 16GB of regular DDR3, or 32GB ECC.  Due to extra pins needed for ECC, the motherboard has to support it.  Since Nehalem the memory controller is in the CPU itself, so it's largely up to the CPU what's supported.  Also, 8GB ECC sticks are expensive, comparatively to their 4GB counterparts.  Intel likes us to believe that only Xeon's come with the 32GB of RAM support, but that's not exactly the case.

i7 Memory Controller Limits


Finding principal on two loans of equal term given different rates and amounts

Question: I'm reading through Marcel B. Finan's A Basic Course in the Theory of Interest and Derivatives Markets: A Preparation for the Actuarial Exam FM/2 on my own and am unsure how to proceed with a question (page 103, question 12.4). It is:

Brian and Jennifer each take out a loan of $X$. Jennifer will repay her loan by making one payment of 800 at the end of year 10. Brian will repay his loan by making one payment of 1,120 at the end of year 10. The nominal semi-annual rate being charged to Jennifer is exactly one-half the nominal semi-annual rate being charged to Brian. Calculate $X$.

I'm assuming "nominal semi-annual rate" in the question actually means a nominal annual rate convertible semiannually. (If that's wrong, please correct me!)
Then letting Brian's nominal annual rate be denoted $B$ (so Jennifer's is $B/2$), we have $$X=800\left(1+\frac B4\right)^{-20}=1120\left(1+\frac B2\right)^{-20}$$ but I am at a loss as to how to solve this for $B$ (without expanding each (binomial)$^{20}$). Can anyone help please?
Answer: Hint: $$800\left(1+\frac B4\right)^{-20}=1120\left(1+\frac B2\right)^{-20}$$ might suggest
$$800^{-1/20}\left(1+\frac B4\right)=1120^{-1/20}\left(1+\frac B2\right)$$ which might be easier to solve for $B$.


Bitcoind and multiple users

Question: I was wondering if anyone had advice for running bitcoind for multiple users. I obviously don't want users to get into other users transactions. As far as I can tell I'll need to run multiple instances of Bitcoind, but this is a terrible waste of bandwidth. Can I at least share the blockchain across users?
Answer: Bitcoind allows you to house multiple and separate accounts in a single instance of the bitcoin client. Using the accounts feature is probably what you're looking for.
https://en.bitcoin.it/wiki/Accounts_explained
Comment: Is it possible to separate access to accounts for different Unix/Linux/Windows users? One daemon bitcoind, with many accounts?
Comment: This question doesn't make sense, but I will try to answer. You need some sort of user account app on top of bitcoind to manage user authentication, account management, send/receive transactions. This app needs  to communicate with bitcoind.
Comment: Depreciated there is really no other way now other then running your own db and listening for wallet changes.

Bitcoind and multiple users


Translating "很快就有人去了." ? Confusing word order

Question: Can anyone help me translate this sentence properly?
很快就有人去了.
My attempt is "Very quickly and soon, some people left." However I don't really understand the 很快就 part. Like i thought if these were modifying the verb, why are they in the beginning of the sentence before the noun 有人 ?And is 快 modifying 就?And what would be the purpose of that given that 就 just means "then..."?
Comment: I would translate it as "soon someone would be going".
Comment: Based on the context, 去 may mean "go / attend" or "die".
Answer:
很快就有人去了

This uses a variation of the grammar structure:

快 + Verb + 了
When using 快 ⋯⋯了 (kuài... le) with verbs, it takes on a meaning similar to the English "just about to." Normally you can add 要 (yào) before the verb.
快⋯⋯了 (kuài... le) with Verbs, Chinese Grammar Wiki

In this case what's about to happen is 去 ("to go"), it's happening to 有人 ("someone"), and the 快 ⋯⋯了 (with the change of state 了) indicates it hasn't yet happened.  The 很 and 就 seem to add urgency to the sentence.  It can thus be translated to something like:

Someone will go very soon.

My impression is that it's better to put 有人 before the 快, such as in:

有人很快就学会了[src]
Some people will soon master [it].
喝啤酒时,为什么有人很快就上厕所[src]
When drinking beer, why [do] some people soon need to go to the toilet?

Other examples using this structure:

很快就有人发现了[src]
Someone soon discovered...
很快就有人可以取代你的位置[src]
Someone can take your place very soon.
Answer:
很快有人去了 = very soon, someone go
In this case, "了" is acting as a final particle that indicate the sentence is ended, adding emphasis  to the verb or soften the tone of the sentence

~

很快有人去了 = very soon, someone had gone
In this case , "了" is acting as a verb particle that indicate the verb 去 is completed

就 has many meanings.

In the context of "了" acts as a final particle, "就" would mean "would"
很快(就)有人去了 = very soon, someone (would) go

~

In the context of "了" acts as a verb particle, "就" would mean "then"
很快(就)有人去了 = very soon (then) someone had gone
Answer: If you only have fragments of language, it is hard to get the meaning exactly. You should always put more context.
If we add some more, it is easier to understand.
听说了宝藏的事后,
After hearing about the hidden treasure,
很快就有人去寻宝了。
people quickly went in search of it.
大家听说地震后的灾区急需援助,
After hearing about the urgent need for disaster relief in the area affected by the earthquake,
很快就有人去了。
people rushed to assist.
很快就有人 = very 很 quick 快 then 就 there were 有 people 人 to 去

Translating “很快就有人去了.” ? Confusing word order


Page of posts made to look like homepage

Question: Is there any way i can get a page of posts from a certain category to look like the homepage (twentyeleven theme) of just blog posts?
Thanks
Answer: WordPress creates archive pages for categories. Using the Twenty Eleven demo, see this URL: http://twentyelevendemo.wordpress.com/category/uncategorized/
Answer: Its actually really simple to do. In the 'Appearance' tab of the left had admin sidebar click 'Menu'
Once in menu you'll see a block called 'Categories' click the check box of the catagory you want to appear on a page, then click 'Add to Menu'
Go to your home page and you'll see that you have a new menu item that links to a page of post from that particular category.
Hope that helps.


What to do when QA team has no test case documentation?

Question: I just started working as a QA Automation Engineer to a certain company which provides ERP and CRM services. However, I recently discovered that they have no test case documentation for the testing they do, and just report bugs. I am now having a hard time to automate their tests because I have no reference, what do you think I should do?
Answer: Mindmap all the high-level features of the application together with business owners. Go over the map with stakeholders (e.g users, developers, managers, and sponsors). Do a risk assessment with some key people, maybe also analyze brittle areas based on defect reports.

Write automated happy-path tests for the highest risk features first.
Create a test-automation debt backlog, prioritize with stakeholders
In the meantime write automated tests for past critical defects as well.
Train developers to write automated tests for new features to stop fill the gap of missing tests.
Answer: You could tackle that from two directions. You could take the bugs and ask the people who opened the bugs how to reproduce them. There is your testcase. You can probably start automating regression tests for these bugs immediately.
Or you could just write the test cases yourself based on the documents and SUT you have. Maybe there is a business capability map for which you can write happy path tests or maybe you have user stories with acceptance criteria for which test cases can be written. Or you go through the SUT and look what it should do.
I usually take the approach that the test code is the test case and with a BDD framework you can more easily create test cases that are pretty readable and can be understood by the developers and management.

In conclusion:
Write the test cases yourself, focus on bug regression and happy path. Use a BDD framework to write test cases. Get help from people who know the features and created the bugs.
See also: xunitpatterns article.
Comment: +1 for the test code should become the test-cases, make sure they are readable.
Answer: Test Automation is not about having or not having test cases, which you can automate. This is about you deciding on test automation strategy. I wrote a blog post, which has several links and ideas where to start. Main idea is that you start with strategy: what do you want to automate, what kind of information you want to collect, how will you know that you automated the right thing. If you automate without strategy, you are building technical debt. I hope it helps.
Comment: Thanks for stating that the blog post you linked is yours. Please also summarize the main points of the post in your answer so that the essential points are here but your post adds references and advice.
Comment: @KatePaulk update done. I can put those links here as well. It seams that people here don't like my blog.
Answer: As detailed in
https://sqa.stackexchange.com/a/38917/8992

Learn about the domain
Capture the existing functionality using a tool such as Cucumber or RSpec to document it
Make real tests described in English
Create Smoke, Happy and Sad cases


Why do I get drastically different hash rates for different currencies

Question: I'm using MinerGate and when I try to mine Ethereum I get around 10KH/s but when I try to hash Monero I get only 200H/s. I know they would be different but 1000 times different? I'm using a CPU for both. Confused. What am I missing?
Answer: I was pretty sure the answer was already on here, but here is a new answer:
Ethereum and Monero use different ways of hashing to secure the blockchain (Ethash vs CryptoNote). The computational difficulty of hashing depends on the hardware and the algorithm itself. For example, imagine if I measured how many pairs of three-digit numbers you could add together using pen and paper in an hour. Compare that to how many pairs of three-digit numbers you could multiply together in the same amount of time. Harder algorithms, same computation hardware (your brain). Some hardware is more efficient at doing certain operations than others, too. This is usually measured in instructions per cycle. This is why, for example, a 386 computer running can do more multiplications per second than a 286 running at the same number clock speed (MHz) and the reason why "more megahertz means faster" is referred to as the megahertz myth. See also What aspect affects the GPU's mining speed?
Comment: Ethash and CryptoNote are entirely different beasts. Your Adobe Photoshop takes 1000x times longer to start than your basic text editor. Both are simply examples of "starting a program". An algorithm that fits in your CPU cache is about 1000x faster than one that needs to use RAM. (all else equal) An algorithm that only needs RAM is 1000x faster than an SSD. And if it's too big for an SSD, a HDD is 100x slower than an SSD for random access.
Comment: Understood but 1000x? Wouldn't that depend mainly on the CPU/GPU i'm using?
Comment: It doesn't make sense to refer to "mainly" in general here; there is an interaction effect. Which algorithm is faster to compute can depend on the hardware (if you look up hardware benchmarks, which hardware is fastest sometimes depends on what software is running). Also, some hardware is just much faster than others. But yes - 1000x is not a surprising number. Easy to visualize: when encrypting a disk, some software can be configured to set the number of "rounds" the encryption is performed in; one can slow down the process by using 1000 rounds of encryption vs 1.


Issues using gmail with google apps and external domain

Question: I have recently tried to use gmail through google apps as my main email client, but I'm experiencing a few different problems.
I am managing the domain (conjunktiondesign.co.uk) through 123reg.co.uk but it is hosted through fasthosts.co.uk.  I transfered the domain to 123reg as fasthosts did not allow me to change the MX records myself.
I followed the setup instructions step by step on google apps and changed the MX records as they told me to.  My email was now working perfectly but my website was down and I was getting the following error:
The dnsserver returned: No DNS records
I have a friend that is using the same system as me (ie. Externally hosted domain and google apps mail) and I changed my 123reg details to the same that he had (as his was working perfectly - both email and website).
I changed my name servers to point to fasthosts, rather than 123reg and I added an A record called '@' pointing to fasthosts IP address.  I also created another A record called 'www' pointing to fasthosts IP address.
After I did this, my website worked almost immediately but I have only realised that since changing it my email is now down.  I have not received anything since Saturday.
I am a web designer and would consider myself fairly tech savvy, but I have no idea about A records, CNAME's and all the things I have been messing about with!
What I ultimately need is someone to help me get my email and website working at the same time, rather than one being down when the other is OK.  I seem only able to get one or the other working.  I have now changed the name servers back to 123reg in an attempt to get my email back as it is more important than my website at this stage.
Any help is much appreciated.
Thanks.
Answer: Please share you zone file because on doing a DNS lookup I am getting the following results. From what it looks like the problem lies with the DNS entries.
Can you make a simple DNS entry like this in your zone file.
www A IP_OF_WEBSERVER and then check
$ dig @ns2.123-reg.co.uk conjunktiondesign.co.uk
; <<>> DiG 9.7.1-P2 <<>> www.conjunktiondesign.co.uk
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 58696
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;www.conjunktiondesign.co.uk.   IN  A
;; AUTHORITY SECTION:
conjunktiondesign.co.uk. 1572   IN  SOA ns.123-reg.co.uk. hostmaster.conjunktiondesign.co.uk. 2011022102 86400 3600 1209600 86400
;; Query time: 77 msec
;; SERVER: 220.127.116.11#53(22.214.171.124)
;; WHEN: Mon Feb 21 21:22:00 2011
;; MSG SIZE  rcvd: 103
Comment: I have added the DNS entry as you said and these are the results I got in Terminal...   $ dig @ns2.123-reg.co.uk conjunktiondesign.co.uk

; <<>> DiG 9.4.3-P3 <<>> @ns2.123-reg.co.uk conjunktiondesign.co.uk
; (1 server found)
;; global options:  printcmd
;; connection timed out; no servers could be reached    I don't really understand that stuff.  Do you?
Comment: I'm not sure what you mean by sharing my Zone file?
Comment: can you let me know how I can share my zone file.  Thanks


Ideas to slow down RC PF train motor (Item: 88002)

Question: I'm wondering if you already tried to slow down such a motor. I would like the train to run slower at all the supported 7 speeds. Anyway, at speed 7, the train just flies off the tracks.
Answer: Unfortunately it's direct drive so gearing it down really isn't an option. That leaves changing the electrical system.
What battery are you using? Fundamentally, any change to the electrical system is going to amount to "use a half flat battery", and if you're using a high-voltage battery now the easy option is to switch to lower-voltage rechargeable batteries. But that only works if you're currently using disposable AAA batteries in the 88000 battery box (or 6 AA's in the bigger one that I don't think I've ever seen in a train). If you are, switching to either NiMH AAA batteries or the the Lego LiIon battery pack 8878 will give you the effect you want.
Based on Philo's extensive comparisons but it's the speed/voltage graph that you probably care about more:

What you want to do is lower the voltage at each setting of the controller, and that means adding a resistor in series with the motor.
If you're currently using rechargeable batteries, the only option I can see is to modify the motor or IR receiver. It's just adding a resistor in the cable, so it's relatively easy to do and also to undo, but it's going to look messy and it will be more fragile than the unmodified item. If you're unsure (which I assume you are, since you're asking here rather than just doing it), it's probably better to buy an extension cable and modify that.
Your motor draws about 1.3A when stalled, and from the speed/power charts lower down, about 0.4A when running. I'm going to guess you want to lose about 1V from the 7V output of the receiver, so you need about 1/0.4 = 2.5Ω. Since that Needs to cope with about 1A, it would ideally be a 3W or 5W resistor but you can probably get away with 1W. I suggest using 2, 5Ω 1W resistors in parallel since resistors typically come in 1W and 5W sizes, and in 10% increments so you actually want 5.6 ohm. RadioShack sell them, as should any other electrical part supplier.
Again, Philo explains what the wires do (2/3 down the page), and the easy way to do this is to put the extension between the battery and the IR receiver. That way you put the resistor on an outside wire of the four. If you can solder the resistors in place it'll work better, but if you can't just stripping the wires and twisting them in place then holding it together with tape will work.
Comment: Thank you for such complete information.

So the "clean" solution is to use either the 7.4V set 8878, either rechargeable AAA batteries that have less than 1.5V each.
Comment: Similar topics come up regularly on various forums, like [this one](http://www.eurobricks.com/forum/index.php?showtopic=98327)
Answer: When my train was flying off the tracks, I solved the problem by adding more cars to it, or adding extra weight to the existing cars.
Answer: Whilst that element is designed to be a "direct drive" system, you could try lifting it up and then stacking some gears on it - however you're going to have some issues with the width of the train/wheels and the track gauge and the amount of gearing you can reliably use because of the size of wheels.
In other builds I've seen, the builders have used the smaller motors and some bevel gears to transfer the power correctly.


Who has the right to name the baby, father or mother?

Question: I am aware that this is the right of the parents to name their newborn (children). (It could even be counted as a Wajib (mandatory) practice for parents to choose an appropriate and Islamic name for their children.) But I was wondering if it is considered as the right of father or mother to choose the name of their baby(s)?
Comment: If a father named the child without informing the mother first I would feel betrayed.
Answer: There is no hard and fast rule in Islam that who should or must choose name of baby. If it is chosen with mutual consent of both, that is best.
And Allah knows best.
Comment: Uh-huh, I inquired that, since I saw somewhere which was written it is considered as the canonical right of father, and there seemed to be some traditions regarding that. Of course I strongly agree you that mentioned it is best if they choose the name by mutual consent.
Answer: Well even if I would agree with the answer of @Farhan totally, I must add that in the case that parents couldn't come to a mutual consent (at least Sunni) scholars tend to give this right to the father because of the part of the Verse in Surat al-Ahzaab (33:5) saying

Call them by [the names of] their fathers; it is more just in the
sight of Allah .

This is interpreted as follows: As the child would have the (family) name of the father, so in case that the parents couldn't agree about the name of the child, the father would be the one who has more rights to chose (Fatwa in Arabic). See also this detailed fatwa about naming according to Sunni (more likely Salafi) point of view!
And maybe these ahadith from sahih Muslim and Sunan abi Dawod could support this, as the Messenger of Allah (peace be upon him) named his son himself!
And Allah knows best!
Answer: To supplement the answers already given, evidence for the mother having the right to name the child includes the Quranic story of the mother of Maryam عليه السلام:

وإني سميتها مريم
I have named her Mary
— Quran 3:36

ويدل أيضا على أن للأم تسمية ولدها ؛ وتكون تسمية صحيحة؛ وإن لم يسمه الأب; لأنها قالت: وإني سميتها مريم ؛ وأثبت الله (تعالى) لولدها هذا الاسم
And this is evidence for a child being named by the mother, and that the name she gives is correct, even if it has not been given by the father, for it is said: "I have named her Mary" and Allah retained the name given by the mother.
—Tafsir Jassas


For which numbers there is only one simple group of that order?

Question: There is only one simple group of orders: 3, 60, and 360 respectivley. Are there other groups of this kind? What general characteritics do they share?
From pure curiosity did this question arise.
Thanks for any help.
Comment: See [this question](http://math.stackexchange.com/questions/1423/number-of-finite-simple-groups-of-given-order-is-at-most-2-is-a-classification).
Comment: All other primes are also obvious examples.
Comment: Well, indeed...
I think I should change the question to mean...simple nonabelian group of that order, and then take off the example of n=3, right?
Comment: Ah! Sorry, this seems to be a silly question...
Answer: The orders of all finite simple groups have been worked out as falling into certain infinite families (e.g. the cyclic groups of prime order) or certain 26 sporadic groups.
According to the Wikipedia article listing finite simple groups, there are very limited orders where two simple groups share that order:
"In removing duplicates it is useful to note that finite simple groups are determined by their orders, except that the group $B_n(q)$ has the same order as $C_n(q)$ for q odd, n > 2; and the groups $A_8 = A_3(2)$ and $A_2(4)$ both have orders 20160."

Added: The classification of finite simple groups is a major milestone of group theory, one whose proof is spread across dozens of papers and thousands of pages, mostly published in the years 1955-1983.  After the orders of these were known, noting which orders appear more than once in the list of groups was comparatively trivial.  No order appears more than twice.
A group is simple iff it has no normal subgroup other than the identity and itself.  It is easy to show the commutator subgroup is always normal, so for a simple group $G$ the commutator subgroup is either the identity (which means G is abelian) or the group G itself (which means G is perfect).
The above definition of simple group suggests a parallel with prime numbers.  For finite abelian simple groups the parallel is exact.  Since any subgroup of an abelian group is normal, a finite abelian group is simple if and only if its order is prime, i.e. the cyclic group $\mathbb{Z}_p$ for $p$ prime.
The first big piece of the classification of finite simple groups is the Odd Order Thm. by Feit and Thompson (1963).  It is usually stated as all odd order finite groups are solvable, but an equivalent statement would be that any odd order finite simple group is abelian, i.e. cyclic of odd prime order.
It follows that those orders which admit two distinct simple groups will be even.  Using the notation from the earlier link, these orders can be explicitly stated:

The alternating group $A_8$ is isomorphic to $A_3(2)$ but distinct from $A_2(4)$, with which it shares order $\frac{8!}{2} = 20160$.
The simple groups $B_n(q)$ and $C_n(q)$ for q an odd prime power, n > 2, are distinct but have the same order:

$$\frac{q^{n^2}}{2} \Pi_{i=1}^n (q^{2i}-1)$$
Comment: I think I need more time to digest some information...


How does a question get bumped without any apparent activity?

Question: This old question how-to-find-new-poles-for-old-tent showed up in my list of questions. The list says "modified yesterday fred 1" but I see no apparent activity by anyone named fred or anyone else. What's happening?
Comment: The good news is you are almost to 2,000 rep and will soon be able to [see deleted posts and have access to other cool tools](https://outdoors.stackexchange.com/help/privileges)
Comment: Hi! The answers have covered it, but here's another hint. If you click on "fred" and go into his/her profile, there's a message that says "Keeping a low profile. This user hasn't posted yet." Since the question shows that fred did modify it, that lets you know that fred or someone else deleted the post. Also, if I remember correctly, if a question was modified by a user that's a grayed out number, that means the user is no longer registered, and you can't get to a profile. I hope this helps!
Answer: The user, "fred", wrote a new answer.  That's why the question was bumped to the top of the list.
It turns out the new answer was just a rant, and didn't answer the question.  Three users with sufficient rep, in this case Charlie, imsodin, and myself, apparently flagged it as "not a answer" (or maybe voted to delete it, I don't remember).  When enough users do this, the answer is deleted without mod intervention.
Since your rep is below 2000, you can't see deleted answers.  You can see the question bumped due to activity, but you can't see that activity in the question.  Here is what it looks like to those that have sufficient rep:

The pink background warns us that the post has been deleted.  I deliberately didn't copy the content of the post since it doesn't belong here, and I don't want to give "fred" a grandstand for his rant.
Answer: Basically, Fred with a reputation of 1 posted a now deleted answer and it shows up as last modified by Fred. Not always, but given the new users rarely ever bother to edit their posts and a rep of 1 is usually a sign of spam or low quality, its a really good guess.
You need 2000 rep to see deleted posts.
Comment: But if the answer/edit was deleted, why would the question list not reflect this (by omitting the entry)?
Comment: @MartinF I think its so other users can check to see that things aren't mistakenly being deleted