do happen to have a strip of metal foil running through them, right at about the point of Jefferson's left eye
uh, i just took a new twenty out of my wallet and looked at the foil strip. it's about half-an-inch in from the left side of the bill, about two inches away from the eye in question.
I've been looking for good deals on stir plates for a while now. eBay isn't bad but for about the same price i saw this which is about half the price of new ones i've seen from anywhere else.
Hey thanks for you advice. I misread your first post (sorry it's exam time, I'm a bit distracted).
anyway i haven't implemented changes to the nextRedds allocation yet, but perhaps next week. I thought about it for a minute and decided that i should be able to use a full sized redds matrix which would be 10000x502 elements. While I'm sure you're not too surprised it did cut the time down from 4 hours to 2:45. Then I tried to run the code on Matlab on one of the math servers but it had a problem allocating that much memory to me. Oh well, there are a bunch of standalone windows boxes that should let me take all I want.
What I was thinking before was that I would have to allocate a matrix to take the final size of nextRedds at every row. I believe that the final size of nextRedds is the length of the orginial vector redds plus twice the number of iterations. that would mean a matrix that was 20502 elements long by 10000 elements high. I realized though that I could just use the truncated part of that so instead of 10000x20502 it would only have to be 10000x502.
I was gonna email you to thank you but your email address isn't on display, so this will have to suffice.
I can look into that. The reason I wrote it this was because if the whole matirx was allocated at the begining, then it would be ~20000x10000 entries. I believe that octave/matlab only store things as doubles so the matrix would take, if I've done my math correctly, is ~1.49GB. I don't have that much main memory so that's why I wrote it this way.
Here is the code to which I was refering. It's for creating 1d binary cellular automata. The main block is below:
%%this for loop is going to calculate the number for each cellar from a binary combination of the previous row
%%use its value and its neighbors from the previous generation and store it in 'n.' it then encodes the next slot
for i=2:x+runs
n = (2^2)*copyRedds(1,i-1) + (2^1)*copyRedds(1, i) + (2^0)*copyRedds(1, i+1);
nextRedds(1, i) = ruleArray(1, 9 - (n + 1));
end
%%now calc the first and last
n = (2^1)*copyRedds(1, 1) + (2^0)*copyRedds(1, 2);
nextRedds(1, 1) = ruleArray(1, 9 - (n + 1));
n = (2^2)*copyRedds(1, x+runs) + (2^1)*copyRedds(1, x+1+runs);
nextRedds(1, x+1+runs) = ruleArray(1, 9 - (n + 1));
I'm using gnu octave 2.1.36 on windows. I just installed the binaries that they distributed so I'm not really sure what it was compiled with.
I use Octave at home to test anything I'm doing for the "Matlab" sections of my homework. And while I think it's a great program and works well, for large computations Matlab is much much faster. There is one routine in particular that takes about 4 hours to run at home and only 15 minutes to run at school. And no, this isn't because my home machine is P-MMX 100 and school has has 3GHz P-4's. The machines are pretty closely matched.
i use matlab and GNU octave for most of my research. but then i deal mostly with matrices for which these are particularly suited.
however what matlab really is is a rapid development environment. it's great for quickly taking an idea you want to use and coding an algorithm from it and running it, but it's not super fast. most of the people that i know who are doing research may prototype in matlab, but then they almost invariably write their final stuff in FORTRAN/C because of increased speed and reduced overhead.
the program(s) you want to use are dictated more by your requirments, i.e. what sort of problem are you trying to answer and how do you plan to attack it.
a group of psychologists are running an expirement. the place the subject in a room with a sink, a bucket and a garbage can with a fire in it.
They start with an engineer. The engineer grabs the bucket, runs to the sink, fills it with water and throw it on the fire which promptly goes out.
Next up was a physicist. The physicist whips out his slide rule, does some quick calculations, take the bucket over to the sink, fills it and throws it on the fire. The fire goes out exponentially.
Then they let an applied mathematician try it. The Amath guy fills bucket, sets it down next to the fire and leaves. Astonished, the psychologists ask why he didn't put the fire out. The Amath guy repplied that he had reduced it to an already solved problem.
Last up was a mathematician. The mathematician looked at the fire. Then he walked over and looked at the bucket. Then he walked over to the sink, looked at it, and nodded. He then left the room. The psychologists were completely baffeled by this and asked the mathematician about his behavior. "Simple," he replied. "I just proved that a solution existed."
Currently the UW scrubs all of the email that passes through their servers to keep viruses out. I know that this is a bit different than what you are looking for, but perhaps it's along the same lines.
could you put clockspeed on the laptop first and then hook it up to the server?
psych expirement
on
Science Askew
·
· Score: 3, Funny
a group of psychologist are running an expirement. the place the subject in a room with a sink, a bucket and a garbage can with a fire in it.
They start with an engineer. The engineer grabs the bucket, runs to the sink, fills it with water and throw it on the fire which promptly goes out.
Next up was a physicist. The physicist whips out his slide rule, does some quick calculations, take the bucket over to the sink, fills it and throws it on the fire. The fire goes out exponentially.
Then they let an applied mathematician try it. The Amath guy fills bucket, sets it down next to the fire and leaves. Astonished, the psychologists ask why he didn't put the fire out. The Amath guy repplied that he had reduced it to an already solved problem.
Last up was a mathematician. The mathematician looked at the fire. Then he walked over and looked at the bucket. Then he walked over to the sink, looked at it, and nodded. He then left the room. The psychologists were completely baffeled by this and asked the mathematician about his behavior. "Simple," he replied. "I just proved that a solution existed."
yeah, i checked pricewatch and only 1 vendor had the zire listed. that vendor (with whom i'm not affiliated in anyway) was selling them for $97. maybe in a month or two we'll see them for less.
having your retinal pattern embedded on a smart card
i doubt that they would let retinal patterns be used. your retinal patterns change when you get pregnant. and it's considered an invasion of privacy for women if they have to tell people that they need to change their retinal pattern 'imprint/image' or whatever b/c they're pregnant. IIRC the navy and most of the gov't has stopped using this technology for this reason.
IAAC (i am a climber) and it's just not a matter of being irresponsible. i mean but the same logic i guess you would have to find all race car drivers just as irresponsible. moving around at almost 200mph in 1.5 detroit iron with other people in close proximity is not all that safe.
but they're pro's you say? basically anyone who climbs everest is a pro. and without a doubt anyone who tries something more then just a standard descent doesn't just decide to do it on the way to the top.
um you couldn't really spin the heads on the floppy drive since there is only that small window on the disk under the metal part where the magnetic part is visible
while i don't necessarily disagree with you, if students and working on papers/programs/etc. at both school and home it's helpful to have a common platform. the school has to serve a large number of people and it goes without saying that most of the students who have computers at home are probably either using macs or a windows box.
Slashdot Mirror
do happen to have a strip of metal foil running through them, right at about the point of Jefferson's left eye
uh, i just took a new twenty out of my wallet and looked at the foil strip. it's about half-an-inch in from the left side of the bill, about two inches away from the eye in question.
I've been looking for good deals on stir plates for a while now. eBay isn't bad but for about the same price i saw this which is about half the price of new ones i've seen from anywhere else.
Just an FYI to all the /.'ers, the group formerly known as NIMA has changed its name to the National Geospacial Agency, or NGA.
How quickly can Apple release a Cocoa patch that handles it?
probably about as fast a OOo can crack it and apple can port it.
it's not really a cube is it? i mean, that implies n^3 but this is n^4 so is it really a rubiks quartic?
Hey thanks for you advice. I misread your first post (sorry it's exam time, I'm a bit distracted).
anyway i haven't implemented changes to the nextRedds allocation yet, but perhaps next week. I thought about it for a minute and decided that i should be able to use a full sized redds matrix which would be 10000x502 elements. While I'm sure you're not too surprised it did cut the time down from 4 hours to 2:45. Then I tried to run the code on Matlab on one of the math servers but it had a problem allocating that much memory to me. Oh well, there are a bunch of standalone windows boxes that should let me take all I want.
What I was thinking before was that I would have to allocate a matrix to take the final size of nextRedds at every row. I believe that the final size of nextRedds is the length of the orginial vector redds plus twice the number of iterations. that would mean a matrix that was 20502 elements long by 10000 elements high. I realized though that I could just use the truncated part of that so instead of 10000x20502 it would only have to be 10000x502.
I was gonna email you to thank you but your email address isn't on display, so this will have to suffice.
I can look into that. The reason I wrote it this was because if the whole matirx was allocated at the begining, then it would be ~20000x10000 entries. I believe that octave/matlab only store things as doubles so the matrix would take, if I've done my math correctly, is ~1.49GB. I don't have that much main memory so that's why I wrote it this way.
Here is the code to which I was refering. It's for creating 1d binary cellular automata. The main block is below:
%%this for loop is going to calculate the number for each cellar from a binary combination of the previous row
%%use its value and its neighbors from the previous generation and store it in 'n.' it then encodes the next slot
for i=2:x+runs
n = (2^2)*copyRedds(1,i-1) + (2^1)*copyRedds(1, i) + (2^0)*copyRedds(1, i+1);
nextRedds(1, i) = ruleArray(1, 9 - (n + 1));
end
%%now calc the first and last
n = (2^1)*copyRedds(1, 1) + (2^0)*copyRedds(1, 2);
nextRedds(1, 1) = ruleArray(1, 9 - (n + 1));
n = (2^2)*copyRedds(1, x+runs) + (2^1)*copyRedds(1, x+1+runs);
nextRedds(1, x+1+runs) = ruleArray(1, 9 - (n + 1));
I'm using gnu octave 2.1.36 on windows. I just installed the binaries that they distributed so I'm not really sure what it was compiled with.
I use Octave at home to test anything I'm doing for the "Matlab" sections of my homework. And while I think it's a great program and works well, for large computations Matlab is much much faster. There is one routine in particular that takes about 4 hours to run at home and only 15 minutes to run at school. And no, this isn't because my home machine is P-MMX 100 and school has has 3GHz P-4's. The machines are pretty closely matched.
the San Franciso Symphony has an excellent website for kids. They can compose their own music and learn about diffrent instruments.
sfskids.com
i use matlab and GNU octave for most of my research. but then i deal mostly with matrices for which these are particularly suited.
however what matlab really is is a rapid development environment. it's great for quickly taking an idea you want to use and coding an algorithm from it and running it, but it's not super fast. most of the people that i know who are doing research may prototype in matlab, but then they almost invariably write their final stuff in FORTRAN/C because of increased speed and reduced overhead.
the program(s) you want to use are dictated more by your requirments, i.e. what sort of problem are you trying to answer and how do you plan to attack it.
a group of psychologists are running an expirement. the place the subject in a room with a sink, a bucket and a garbage can with a fire in it.
They start with an engineer. The engineer grabs the bucket, runs to the sink, fills it with water and throw it on the fire which promptly goes out.
Next up was a physicist. The physicist whips out his slide rule, does some quick calculations, take the bucket over to the sink, fills it and throws it on the fire. The fire goes out exponentially.
Then they let an applied mathematician try it. The Amath guy fills bucket, sets it down next to the fire and leaves. Astonished, the psychologists ask why he didn't put the fire out. The Amath guy repplied that he had reduced it to an already solved problem.
Last up was a mathematician. The mathematician looked at the fire. Then he walked over and looked at the bucket. Then he walked over to the sink, looked at it, and nodded. He then left the room. The psychologists were completely baffeled by this and asked the mathematician about his behavior. "Simple," he replied. "I just proved that a solution existed."
Here's a link
could you put clockspeed on the laptop first and then hook it up to the server?
a group of psychologist are running an expirement. the place the subject in a room with a sink, a bucket and a garbage can with a fire in it.
They start with an engineer. The engineer grabs the bucket, runs to the sink, fills it with water and throw it on the fire which promptly goes out.
Next up was a physicist. The physicist whips out his slide rule, does some quick calculations, take the bucket over to the sink, fills it and throws it on the fire. The fire goes out exponentially.
Then they let an applied mathematician try it. The Amath guy fills bucket, sets it down next to the fire and leaves. Astonished, the psychologists ask why he didn't put the fire out. The Amath guy repplied that he had reduced it to an already solved problem.
Last up was a mathematician. The mathematician looked at the fire. Then he walked over and looked at the bucket. Then he walked over to the sink, looked at it, and nodded. He then left the room. The psychologists were completely baffeled by this and asked the mathematician about his behavior. "Simple," he replied. "I just proved that a solution existed."
yeah, i checked pricewatch and only 1 vendor had the zire listed. that vendor (with whom i'm not affiliated in anyway) was selling them for $97. maybe in a month or two we'll see them for less.
This sounds like the movie RPM. Of course in the movie they used two cars to trick people into thinking it was perpetual motion.
it's probably a 12ax7
this is a super common pre amp tube used in a lot of 'hybrid' (tube preamp and solid state poweramp) music gear. they're also really cheap.
having your retinal pattern embedded on a smart card
i doubt that they would let retinal patterns be used. your retinal patterns change when you get pregnant. and it's considered an invasion of privacy for women if they have to tell people that they need to change their retinal pattern 'imprint/image' or whatever b/c they're pregnant. IIRC the navy and most of the gov't has stopped using this technology for this reason.
it still is good news in that they decided not to change to a m$ based solution. they went for linux.
but they're pro's you say? basically anyone who climbs everest is a pro. and without a doubt anyone who tries something more then just a standard descent doesn't just decide to do it on the way to the top.
isn't linus torvalds working for transmeta on an h1b visa?
um you couldn't really spin the heads on the floppy drive since there is only that small window on the disk under the metal part where the magnetic part is visible
while i don't necessarily disagree with you, if students and working on papers/programs/etc. at both school and home it's helpful to have a common platform. the school has to serve a large number of people and it goes without saying that most of the students who have computers at home are probably either using macs or a windows box.