More: http://www.cs.indiana.edu/~jsobel/c455-c511.update d.txt about a guy who wrote the "Fast Multiplication" algorithm very simply in scheme, and then transformed it (using correctness preserving transformations, which are much much easier to do in "Haskell or one of the other functional languages" than in C/C++ and friends) into scheme code that was as optimized as he could come up with, and which furthermore had a pretty much 1-1 correspondence with C statements. He then rewrote it in C (including perfect "goto"s!), and beat all but one person in his class on the speed of the algorithm. Furthermore, he spent significantly less time working on (read debugging) his code than anyone else in the class.
One of my friends told me about a Sleep Paralysis episode that she had once, with an extra twist. Her dad came in to tuck her in or something, and asked her a question. She was awake and aware (senses), but not in control of her muscles. She tried to tell her dad "Help! I'm paralyzed!" or something like that, but couldn't. Instead, her mouth opened, and her voice said "yeah dad, I'm fine." She said it was one of the creepiest things that had ever happened to her.
Working on the premise that it's all fake, getting a reliable triangulation would involve asking someone who lives across the country to also give it a shot. After all, since we're assuming it's fake, the signal is coming from a research lab either on Earth or in Earth orbit.
It would be working on the premise that it is not fake that would require receiving points outside the atmosphere.
So, if you attempt to triangulate and get a meaningless result, then you can assume that the signal is coming from a non-local point (ie, probably not fake). If you get a meaningful result, then you know where the signal is coming from, and you can tell that it is fake.
Of course, this all assumes that Earth's surface and Mars don't move relative to one another... If you take that motion into account, then unless the signal source moves exactly like Mars across the sky (which is quite unlikely), it is quite easy to tell whether or not the signal comes from Mars.
A number may be written in binary, octal, decimal, or hexadecimal by the use of a radix prefix. The radix prefixes are `#b' (binary), `#o' (octal), `#d' (decimal), and `#x' (hexadecimal). With no radix prefix, a number is assumed to be expressed in decimal.
I think the major point of the article is that AJAX is currently being used (like a lot of upstart web technologies) in many places were it just confuses things more than needed. Give it time, and people will stop using it just for the sake of jumping on the new craze bandwagon and we'll find out where it shines and where it should never go.
Sorry to interject, but as a complete dickhead, I find your invention of the word probabolist completely stupid. Additionally, the person I was replying to with my minor correction was not a jury, or a member of a jury. He or she identified him or herself as a computer scientist and a lawyer. As such, I would expect that they would understand such concepts as liklihood and probability. I would expect this because such concepts are frequently important to both computer scientists and lawyers. Not, perhaps, as important as they are to an experimental physicist, which might explain the mistake. Regardless of the cause of the mistake, it is an important distinction, and I found it worth correcting.
Sorry to correct, but as a physicist, your jargon is a little bit off. Probabilities deal with future events, the outcomes of which are unknown. What we are discussing here is the likelihood.
When I call for the end of copyright, people say that creation would die if the artist couldn't protect their income. How much do artists today get from the cartels? Nearly 0. Thanks to copyright and those who "own" that right.
It's worth noting that the actual owners of the copyright do get plenty of money. It's just the people who ought to own the copyright, but signed it away in a nasty contract who don't. As you say, the artists get next to nothing from the labels, so copyright laws certainly aren't doing any good to protect creativity as things stand.
The mammal could have eaten the grass, then crawled into the titanosaur shit, had all its flesh and bones eaten away by the titanostench, and only the grass remained.... tragic.;-p
Re:Sensationalist Journalism?
on
A Flu Pandemic?
·
· Score: 4, Insightful
we are 'due for one'.
Mutation of the flu virus into something seriously dangerous, like the 1918 variety, certainly qualifies as a Poisson process. The time between events in the Poisson distribution follows an Exponential distribution. The exponential distribution is "memoryless", that is, the probability that an event will occur in the first n years of a time interval is the same as the probability that, after any number of years in which an event has not occured, an event will occur in the next n years.
Shortly, the fact that we haven't had a flu epidemic recently has absolutely no bearing on whether or not one is coming soon. Even more shortly, we are not 'due for one'. This is known as the gambler's fallacy.
How about a stenchless, buttless cigarette
on
Safe Cigarettes?
·
· Score: 1
Screw safe. I could care less if they're safe, because I don't smoke them. What I do care about is how much they stink, and how annoying it is to see hundreds of cigarette butts littering the ground outside every door to every academic building on campus.
(Yes yes I know, secondhand smoke, it matters whether or not they're safe even if I don't smoke them. And I'd probably get more secondhand smoke if they didn't stink, because I'd be slightly more likely to hang around with people who were smoking. It's mostly a joke. Chill.)
No offense, bro, but I have a deep distrust about this statement, made by anybody. Immaturity evaluates itself as mature just as, or perhaps more, surely and easily than maturity does. Not that I'm saying that you are necessarily immature, but that statement throws up a red flag in my mind, because it is essentially meaningless.
Magnetic fields do no work. Period. They cannot, do not, never have, never will. Read any textbook about electrodynamics if you are curious. One I would recommend is that written by David J. Griffiths of Reed College.
Reason: Magnetic forces are always directed perpendicularly to the direction of motion. Work = F . d , where . means a dot product. Dot products (or inner products) are zero if the two vectors concerned (F and d) are perpendicular. d is the displacement vector, or the integral over time of the velocity vector (ie, it points in the direction of motion.) F is the force, and, if we are talking about a magnetic force, is perendicular to the direction of motion, therefore perpendicular to the displacement vector. Thus, the work done by a magnetic force is zero.
If no work is done, the energy does not change. If the energy does not change, and no other forces act on the particle, then its speed (that is, magnitude of velocity) does not change. If other forces do act on the particle, and it decelerates, then the cause of the deceleration is those other forces, rather than the magnetic force. So, if the speed does not change due to any magnetic force, ever, then magnetic deceleration does not exist.
It is true that in some situations it might seem as if a magnetic field is doing work. However, it is in fact the case, in every one of those situations, that what is in fact doing the work is an induced electric field (from a changing magnetic field), rather than a magnetic field directly. Once again, read a textbook for clarification. Once again, I highly recommend Griffiths.
Anyone out there using another platform that never finds themself asking, "man, if I only had Windows?"
Actually, I use linux on my desktop and at work. I do still have a windows partition on my desktop, so no, I never think "man if I only had windows". However, even though I have windows available, I haven't booted to that partition in months and months... The only reason (yes, that means that there are no other reasons) I would is if I wanted to play some of my old games, which I very rarely have time for (being a physics major and music minor is a full-time job with overtime).
Actually, I was not intending to imply that nobody would buy one... I was just trying to make a (rather lame, I admit) joke, suggesting that Sony was taking orders. Orders as in, say, the military type, not the buy something type.
Ok, this creeped me out just very slightly... How does it come about that this site is hosted at a baylor.edu domain? I'm sitting in my dorm room on Baylor's campus right now... Are there other sites hosted at other universities, or is Baylor just special somehow? I never had the impression that our CS dept was really much good (physics is my business).......
Slashdot Mirror
More: http://www.cs.indiana.edu/~jsobel/c455-c511.update d.txt about a guy who wrote the "Fast Multiplication" algorithm very simply in scheme, and then transformed it (using correctness preserving transformations, which are much much easier to do in "Haskell or one of the other functional languages" than in C/C++ and friends) into scheme code that was as optimized as he could come up with, and which furthermore had a pretty much 1-1 correspondence with C statements. He then rewrote it in C (including perfect "goto"s!), and beat all but one person in his class on the speed of the algorithm. Furthermore, he spent significantly less time working on (read debugging) his code than anyone else in the class.
Some literature (well, anecdote) on why you should use lisp: http://www.paulgraham.com/avg.html
Ah. Thank you. Just added another filter to adblock! No more urchins for me!
The government could even issue national virus ID cards, with RFID tags in them!
One of my friends told me about a Sleep Paralysis episode that she had once, with an extra twist. Her dad came in to tuck her in or something, and asked her a question. She was awake and aware (senses), but not in control of her muscles. She tried to tell her dad "Help! I'm paralyzed!" or something like that, but couldn't. Instead, her mouth opened, and her voice said "yeah dad, I'm fine." She said it was one of the creepiest things that had ever happened to her.
Working on the premise that it's all fake, getting a reliable triangulation would involve asking someone who lives across the country to also give it a shot. After all, since we're assuming it's fake, the signal is coming from a research lab either on Earth or in Earth orbit.
It would be working on the premise that it is not fake that would require receiving points outside the atmosphere.
So, if you attempt to triangulate and get a meaningless result, then you can assume that the signal is coming from a non-local point (ie, probably not fake). If you get a meaningful result, then you know where the signal is coming from, and you can tell that it is fake.
Of course, this all assumes that Earth's surface and Mars don't move relative to one another... If you take that motion into account, then unless the signal source moves exactly like Mars across the sky (which is quite unlikely), it is quite easy to tell whether or not the signal comes from Mars.
Mars still moves in a geocentric view. So you would still achieve a different relative Earth/Mars position.
(cat tongue > cheek)
WTF!? your cat's tongue is in your cheek!? That's sick, man!
[/facetious] Don't worry, I do understand bash.
Unless you're a Scheme programmer. From R5RS,
A number may be written in binary, octal, decimal, or hexadecimal by the use of a radix prefix. The radix prefixes are `#b' (binary), `#o' (octal), `#d' (decimal), and `#x' (hexadecimal). With no radix prefix, a number is assumed to be expressed in decimal.
I think the major point of the article is that AJAX is currently being used (like a lot of upstart web technologies) in many places were it just confuses things more than needed. Give it time, and people will stop using it just for the sake of jumping on the new craze bandwagon and we'll find out where it shines and where it should never go.
True indeed. In fact, if you look at the author's Original Top Ten Mistakes in Web Design, number 2 is "Gratuitous Use of Bleeding-Edge Technology".
Sorry to interject, but as a complete dickhead, I find your invention of the word probabolist completely stupid. Additionally, the person I was replying to with my minor correction was not a jury, or a member of a jury. He or she identified him or herself as a computer scientist and a lawyer. As such, I would expect that they would understand such concepts as liklihood and probability. I would expect this because such concepts are frequently important to both computer scientists and lawyers. Not, perhaps, as important as they are to an experimental physicist, which might explain the mistake. Regardless of the cause of the mistake, it is an important distinction, and I found it worth correcting.
Everyone knows mathematicians can't do arithmetic! Heck, they're even worse at it than physicists, like me! :-p
Sorry to correct, but as a physicist, your jargon is a little bit off. Probabilities deal with future events, the outcomes of which are unknown. What we are discussing here is the likelihood.
7. ???
8. PROFIT!!!!
When I call for the end of copyright, people say that creation would die if the artist couldn't protect their income. How much do artists today get from the cartels? Nearly 0. Thanks to copyright and those who "own" that right.
It's worth noting that the actual owners of the copyright do get plenty of money. It's just the people who ought to own the copyright, but signed it away in a nasty contract who don't. As you say, the artists get next to nothing from the labels, so copyright laws certainly aren't doing any good to protect creativity as things stand.
The mammal could have eaten the grass, then crawled into the titanosaur shit, had all its flesh and bones eaten away by the titanostench, and only the grass remained.... tragic. ;-p
we are 'due for one'.
Mutation of the flu virus into something seriously dangerous, like the 1918 variety, certainly qualifies as a Poisson process. The time between events in the Poisson distribution follows an Exponential distribution. The exponential distribution is "memoryless", that is, the probability that an event will occur in the first n years of a time interval is the same as the probability that, after any number of years in which an event has not occured, an event will occur in the next n years.
Shortly, the fact that we haven't had a flu epidemic recently has absolutely no bearing on whether or not one is coming soon. Even more shortly, we are not 'due for one'. This is known as the gambler's fallacy.
Screw safe. I could care less if they're safe, because I don't smoke them. What I do care about is how much they stink, and how annoying it is to see hundreds of cigarette butts littering the ground outside every door to every academic building on campus.
(Yes yes I know, secondhand smoke, it matters whether or not they're safe even if I don't smoke them. And I'd probably get more secondhand smoke if they didn't stink, because I'd be slightly more likely to hang around with people who were smoking. It's mostly a joke. Chill.)
I'm mature for my age, honestly
No offense, bro, but I have a deep distrust about this statement, made by anybody. Immaturity evaluates itself as mature just as, or perhaps more, surely and easily than maturity does. Not that I'm saying that you are necessarily immature, but that statement throws up a red flag in my mind, because it is essentially meaningless.
Magnetic deceleration does not exist.
Magnetic fields do no work. Period. They cannot, do not, never have, never will. Read any textbook about electrodynamics if you are curious. One I would recommend is that written by David J. Griffiths of Reed College.
Reason: Magnetic forces are always directed perpendicularly to the direction of motion. Work = F . d , where . means a dot product. Dot products (or inner products) are zero if the two vectors concerned (F and d) are perpendicular. d is the displacement vector, or the integral over time of the velocity vector (ie, it points in the direction of motion.) F is the force, and, if we are talking about a magnetic force, is perendicular to the direction of motion, therefore perpendicular to the displacement vector. Thus, the work done by a magnetic force is zero.
If no work is done, the energy does not change. If the energy does not change, and no other forces act on the particle, then its speed (that is, magnitude of velocity) does not change. If other forces do act on the particle, and it decelerates, then the cause of the deceleration is those other forces, rather than the magnetic force. So, if the speed does not change due to any magnetic force, ever, then magnetic deceleration does not exist.
It is true that in some situations it might seem as if a magnetic field is doing work. However, it is in fact the case, in every one of those situations, that what is in fact doing the work is an induced electric field (from a changing magnetic field), rather than a magnetic field directly. Once again, read a textbook for clarification. Once again, I highly recommend Griffiths.
Anyone out there using another platform that never finds themself asking, "man, if I only had Windows?"
Actually, I use linux on my desktop and at work. I do still have a windows partition on my desktop, so no, I never think "man if I only had windows". However, even though I have windows available, I haven't booted to that partition in months and months... The only reason (yes, that means that there are no other reasons) I would is if I wanted to play some of my old games, which I very rarely have time for (being a physics major and music minor is a full-time job with overtime).
Actually, I was not intending to imply that nobody would buy one... I was just trying to make a (rather lame, I admit) joke, suggesting that Sony was taking orders. Orders as in, say, the military type, not the buy something type.
Sony starts taking orders. . .
. . . from who?
I guess we all do owe the early adopters some sympathy.
Gratitude, perhaps. But not sympathy.
acm.baylor.edu or icpc.baylor.edu
Ok, this creeped me out just very slightly... How does it come about that this site is hosted at a baylor.edu domain? I'm sitting in my dorm room on Baylor's campus right now... Are there other sites hosted at other universities, or is Baylor just special somehow? I never had the impression that our CS dept was really much good (physics is my business).......