"There's a ruler in inches and cm, and sort of free form protractor, (which can also be used to measure pipe diameters, although that's a bit redundant, because it's right next to a ruler) there's also lines for writing and prioritizing notes, and a rudimentary RGB/CMYK color wheel"
- Gabe
from Bookmarklet
Let's home you never lose or gain significant amounts of weight. This could end up being as accurate as the yard's origin being the length from the center of the chest to the tip of the fingers.
- Andy Bakun
I think it might be more useful to have the 0 point at the wrist end rather than the elbow end.
- Gabe
Does anybody know how to compute specific humidity?
Assuming I have a weather report (temperature, pressure, and relative humidity), how can I determine the mass of water vapor in some volume of air?
- Gabe
chaz2b: Thanks, but neither of them seem to have what I want. The efdl link has variables labeled rh, pa, and Ta. I can infer that they mean rh, pressure, and temp, but it doesn't say what units they're supposed to be. The gorham link tells how to get absolute humidity, not specific humidity. The adsabs link seems to have differential equations, but nothing I can use.
- Gabe
Greg: that link requires knowing the density of water vapor and air. All I have is a weather report.
- Gabe
SuezanneC: your link has absolute humidity (g/m^3), not specific humidity (g/kg).
- Gabe
You say that as if that means it doesn't answer your your question, but I"m not sure that is the case. You ask for the mass of water vapor in a volume of air, which seems more closely related to grams per cubic meter than it does to grams per kilogram. Here's another link. http://forum.onlineconversion.com/showthr... . Also, when people take the time to try to solve your problems for zero dollars per hour, a thank you would be appropriate.
- SuezanneC Baskerville
Thanks, jamar78, that's basically what I was looking for.
- Gabe
SuezanneC: thanks for the help, but I wasn't looking for somebody to do research for me. Google was supplying a bunch of links that didn't answer my question so I just figured that there would be some engineer who would know the answer off the top of their head.
- Gabe
The problem is that you need to know the total amount of water that air will hold at a given temperature and pressure. After you have that, you only need multiply that by the relative humidity to get the specific humidity. Water and air is a very common system, so the saturation pressure and temperature are compiled for a very wide range. It's hard to fit an equation to such a wide range, so people usually look it up in a table or fit an equation to their desired range of temperatures and pressures.
- Clare Dibble
Update: if you are near ambient temperatures and pressures, you can assume the ideal gas law and use Antoine's equation to calculate saturation. The coefficients are available here: http://webbook.nist.gov/cgi...
- Clare Dibble
Thanks, Clare. I just figured that there was some common equation to tell me specific humidity. I didn't expect that it was so uncommon that it would require derivation and table lookups. You see, I am trying to figure out the heat rate for a gas turbine to compute what it would cost to run. The heat rate is specified at a specific temperature, pressure, and humidity, so I wanted to...
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- Gabe
Five little ducks went out one day, over the hill and far away. Mother duck said, "Quack! Quack! Quack! Quack!" But only four little ducks came back...
- April Buchheit
It was $1, and was one of the smallest bananas I've ever eaten! Of course the receipt was a whole 8.5x11 sheet of paper. In a grocery store you can probably get multiple pounds of bananas for $1.
- Gabe
it's 45 cents per pound in my local Wal-Mart...
- Philippe
Whole foods actually sells it for $0.60 sometimes... So it is not terribly off :)
- Bindu Reddy
Whole Foods sells small bananas for $0.60 each, or they sell bananas for $0.60/lb?
- Gabe
I saw a sign on my way to the hospital today that said "Pop can drive this weekend".
- Gabe
Collecting donated empty soft drink cans for recycling money - it's a fundraising activity, typically used by secondary schools and kids sports teams/social clubs.
- Micah Wittman
It means your father is capable of operating a motor vehicle.
- MicahBear78
OR... he thinks he can still drive but they never renewed his license.
- Micah Wittman
It turns out that Micah is right about this one.
- Gabe
I bought a massive pack of disposable razors (BumpFighter brand by ASR) on Ebay about 2 years ago. I'm still not out of them. :)
- ha3rvey (doink doink)
The one with the most blades. Gillette Mach 7 or something.
- Rodfather
I like the Mach 7. I've been using mine for several years. Just buy the disposable blade thingies and you keep the handle. Works great. Nary a knick on my face.
- Jason Huebel
Those disposable cartridges cost something like 10 times as much as regular razor blades. And I'm guessing they don't last as long. I can't imagine using up $20 worth of razor blades in a year. How many dollars per week do those fancy cartridges cost?
- Gabe
I don't use cartridges, and I'm too lazy to go figure out exactly what I use. I think they're made by Gillette. They have plastic handles and blades built together. I think they pivot and have 3 or 4 blades. I only change to a new one about once a month, if that. I don't spend much time worrying about he cost of razors though. ;)
- Cristo
So the consensus is nobody knows where to buy razor blades so you have to use a cheap, crappy disposable or expensive cartridge-type razor instead of the good yet cheap razors.
- Gabe
"cheap, crappy disposable" is in the eye of the beholder, I suppose. I ended up having to use a two blade airport hotel disposable on a recent trip, and it made the razors I normally use seem like a luxury. Of course, you could always just grow a beard or let your leg hair grow. ;)
- Cristo
Does anybody know the difference between code and data?
And nobody should if malware writers have their way. Data is code!! Err...
- George Burgyan
from iPhone
Most software projects have two repositories of information: a code repository and a data repository. The exact same information can be called code or data depending which repository you put it in. By the way, you get more answers on FriendFeed if you write DO ANYBODY NO.
- Bruce Lewis
from fftogo
code:spaghetti::data:meatball ... (going to have some ravioli for lunch now ;^)
- Dan Freeman
Code is always data, and data is sometimes code.
- Cristo
Gabe, the kind for which there is no current machine or virtual machine to execute it. Of course, the thesis degrades as the definition of code does. If any code that doesn't do anything useful (immediately faults or throws an exception) is deemed to be code, but just bad code, then of course all data is code. Similarly, if an area of memory that holds data is what is being talked about, and there is a way to change that memory to some different data, then of course that data could be loaded with code.
- Cristo
To me, data is the result of something -- observation, calculation, measurement etc. Code is the instructional manipulation of data
- Shey, Jamaican of FF
what I recall from OS theory class is "different segment"
- winterismute
Sure, you could say that a text file is clearly data, but isn't it really code instructing the text editor what to display?
- Gabe
It depends on the context, and on which definition of "code" you are using. Program code is the instructions - the program itself - while data is anything that gets fed in to / spewed out of the program. Of course, your data can be more program code, or it could be encrypted text (also called "code"), or perhaps a set of dialling prefixes ("codes"), or it could even be a string of...
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- Slippy "Threadsbane" Lane
Gabe, Checkmate. Data is always code (for a text editor). :)
- Cristo
*Ahem* I think you'll find that's NOT checkmate. I shall counter with "Code is always data (for a C compiler)". Bishop takes King's rook's pawn, and I think you will find, sir, that there is your checkmate. :-)
- Slippy "Threadsbane" Lane
Code is an algorithm and the data is the result of that algorithm.
- ashish
Slippy, my response was to Gabe, and code wouldn't be data for a C compiler if it was Python code, unless a bunch of random syntax errors would be the result you were looking for.
- Cristo
Yes, I often annoy people by joining in chess games as I pass by and claiming that every move I make is checkmate, despite not even knowing what the little horsey pieces are called. It's the intellectual equivalent of shouting the wrong punchlines at people who are telling jokes. Not that I'm claiming to be intellectual, of course.
- Slippy "Threadsbane" Lane
But actually, Python code would still be data to a C compiler - it would be meaningless data that it couldn't compile, but data nonetheless. King's horsey takes Jack's prawn. That, I believe, is a Royal Flush. Game, set and match me, I think.
- Slippy "Threadsbane" Lane
Slippy, see my earlier comment about the thesis degrading.
- Cristo
in a more esoteric sense, one might entertain a general equivalence between some data and the simplest code which could produce that data (ala Kolmogorov) ...
- Dan Freeman
In terms of DNA, RNA, and protein sequences, there isn't really a difference.
- Victor Ganata
Cristo: Careful, you are in very real danger of taking me seriously. I am merely stringing words together for fun.
- Slippy "Threadsbane" Lane
My original statement really applied to my thinking of already compiled code that was in memory in the process of being executed. Areas of memory can be used to store code as data, and can be used to execute data as code. In my mind, data that is executed as code which immediately faults or raises exceptions was not intended to be code. Then again, there were people in my CS classes that could probably produce this result also. ;)
- Cristo
I heard that Google just switched their mapping dataset to a really crappy one.
Or they hate their users: "Take the exit onto I-80 W toward Lowa. Take exit 151A on the left to merge onto I-57 S toward Memohis". I'm pretty sure Illinois's highways signs don't actually point to Lowa and Memohis.
- Gabe
I wouldn't be surprised if they do Gabe. I know that there are plenty of signs on I-94 in Michigan which say either Detroit or Chicago.
- Robert Felty
Rob: I'm going to guess that all of the signs around to Chicago point to actual places like Iowa (rather than Lowa) and Memphis (rather than Memohis).
- Gabe
I thought you had made those typos. Now I see what you mean.
- Robert Felty
The coat was actually a gift from my boss (really his wife). I'll tell him that you like it. In case you want one of your own, it came from http://www.hannaandersson.com/
- Gabe
"Zachary’s offense? Taking a camping utensil that can serve as a knife, fork and spoon to school. He was so excited about recently joining the Cub Scouts that he wanted to use it at lunch. School officials concluded that he had violated their zero-tolerance policy on weapons, and Zachary was suspended and now faces 45 days in the district’s reform school."
- Gabe
from Bookmarklet
The great thing about zero tolerance is that it eliminates discrimination. Apparently the answer to black kids getting suspended more often than white kids is to suspend the white kids more often, rather than suspend the black kids less often.
- Gabe
Wait a sec, Rachel. I don't think that skeleton outfit would fit you.
- Gabe
Tiger costumes? I thought those were for weddings ;)
- Clare Dibble
The tiger costume was a garage sale buy that my mom made. It just barely its her now, so there's no way it would make it to Halloween. I bought the pumpkin costume for her and then I found the skeleton costume at Target (which I couldn't resist).
- Maggie
We feel fortunate that Spencer doesn't really seem to cry just cause he feels like it. Sometimes it can take a little guessing as to what he wants, but there is usually a solution.
- Robert Felty
"I want to get from A to B. Step A: Something goes wrong. I investigate. Dead end. I google it. Dead end. I check logs. Dead end. I increase logging. More evidence. I google that. Dead end. I download a tool that will get more info. Tool fails to install. I google the installation failure. Dead end. I look for another tool, install that, run it: crashes. I investigate the crash. Dead end. I find a different tool, install that. Get more info. Investigate that. Dead end. Google it. Dead end. Stack overflow it: dead end. Drink coffee, consider taking up smoking. Dead end. Wait two weeks, increase bounty at stack overflow. Dead end. Reboot, check patch level, look for random hints from astrological tables, listen to reggae... dread end. Sometime later, randomly: breakthrough. And on step B."
- Gabe
from Bookmarklet
I calculate that this thing is moving 143,327,232 pixels per second (18MP * 8fps = 144MP/s), which makes it at least 15% faster than any other camera (the next fastest I could find was the D3x, 24.5MP * 5fps = 122MP/s).
- Gabe
I understand there is a Prince of Darkness. Is there also a Princess of Darkness? How about a King?
"Steve Valdez says he was shocked when he was told he had to put his thumbprint on a check written on his wife's Bank of America check. Valdez says the check was written to him with the same address he has on his driver's license. Although he had two forms of identification both with pictures, the bank still required Valdez to give a thumbprint before it would cash the check. But that was impossible, because Valdez was born without arms and wears prosthetic devices."
- Gabe
from Bookmarklet
Stories like this fall into a category for which I can't quite pinpoint the description, but is just me or does Florida pump out a disproportionate number of this ilk. *shakes head*
- Micah Wittman
This is why AI will succeed. The bar is pretty low.
- Matt Mastracci
How about a toe print? Or prosthetic print?
- Rob H.
But those aren't *thumb* prints. <facepalm />
- Matt Mastracci
Matt, AI - exactly. The computers aren't getting smarter, the Turning test keeps getting easier. =)
- Micah Wittman
The bank manager's "idea" of "accommodating" him was to give him the choice of opening an account with them or getting the person who wrote the check to come in with him (thus totally defeating the point of using a check in the first place).
- Gabe
Micah: It's not just Florida. Last month a Missouri Burger King took "No shirt, No shoes, No service" a bit too literally and tried to kick a mother out of the restaurant because her infant had no shoes (apparently socks weren't good enough): http://www.emaxhealth.com/1272...
- Gabe
Gabe, yeah I don't know why it still surprises. Incidentally, did you notice how the comments on the page you linked to were dominated by bare feet advocates. The internet is boundless (unless your live inside a walled garden, but let's not go there now :)
- Micah Wittman
My parents keep asking me if Spencer has shoes (our 6 month old). My answer is always: why do you need shoes if you can't walk yet? And even then, it is probably easiest to learn to walk barefoot.
- Robert Felty
My 4-month-old doesn't have any shoes as far as I know. I certainly never even considered getting her any until now.
- Gabe
"Only one crime was solved by each 1,000 CCTV cameras in London last year, a report into the city's surveillance network has claimed. The internal police report found the million-plus cameras in London rarely help catch criminals. In one month CCTV helped capture just eight out of 269 suspected robbers."
- Gabe
from Bookmarklet
I don't want to sound like I'm supporting the cameras, cause I don't, but are there any stats on crime reduction in these areas? Are the cameras acting as a preventative in any way?
- Glenn Slaven
I don't have stats, but from what I understand the crime rate is largely unaffected by cameras. There are too many cameras to monitor, so no criminals are ever caught in the act. The cameras are only useful after-the-fact to help document the crime or get details on a suspect.
- Gabe
This stat in the article was also interesting though: "We estimate more than 70% of murder investigations have been solved with the help of CCTV retrievals". I wonder how instrumental CCTVs were in those cases and how much spin the police spokesperson was imparting on that statement.
- Simon
To celebrate her 4th birthday, we decided to take her to get give her some extreme pain. There must be some anesthetic in the vaccines, though, because she was asleep before she got back in the car.
- Gabe
If the President is POTUS, does that mean that Presidents are POTI?