The wonderfully idiotic game of Klondike solitaire is ubiquitous; there are countless embarassing pictures of people playing it instead of doing their job. It seems however that some people's job is actually that of playing Solitaire. Take this article for instance, which I found while terribly bored and wondering about whether they came up with a mathematical description for Solitaire and what are the odds of winning. It seems that no, there isn't a complete analysis yet - one of the embarassements of modern mathematics :)
Before discussing the article any further it must be stated that, while to some it might look funny, a waste of time, or downright idiotic to do a study on Solitaire, it's actually quite serious. While the game itself might be considered silly by some, if studying it can bring advancement in "artificial intelligence" then so be it. Because I'm anti-mainstream I like to actually call it "automated problem-solving", because there's nothing intelligent about it or many other game "AIs", but I digress. Studying Solitaire is as valid a scientific endeavour as studying chess or how to slice a pizza so it spilts into equal parts, though this last problem is considerably easier and has been recently solved (searching for the article is left as an exercise to the reader).
Getting back to the Solitaire article, they supposedly worked with a famous mathematician who "carefully played and recorded 2000 games, achieving a win rate of 36.6%". Their software supposedly obtained win rates of up to 70.2%.
So there. There is actually someone whose job is (among many other more productive things I'm sure) to play Solitaire. 2000 games at an average of 20 minutes per game as stated in the article equals exactly 666,6... hours oddly enough. Considering an 8-hour work day, that would equal rougly 80 days of playing Solitaire, or about 4 months. Cool thing indeed.
Saturday, July 9, 2011
Monday, June 20, 2011
internet
I'm on a long scientific visit at a scientific institute, I'm accomodated at a student guesthouse that's on the institute's scientific network and am not allowed to use the Internet for anything other than scientific purposes. I'm also not allowed to transfer more than 420MB/day or thereabout. Their leaflet says they'd let me but they can't because their traffic is metered and they're paying by amount of data transferred. I'm not a furious downloader, especially when I know I'm on a limited network. I just want to relax, read Slashdot and stream a news channel at some few 100 kb/s. But I can't because the institute's traffic is metered.
P.S. Oh shit this post is not scientific enough I'll be punished! [hides]
P.S. Oh shit this post is not scientific enough I'll be punished! [hides]
Wednesday, June 15, 2011
unfortunate
There's a growing trend around here for newspapers to offer various book collections, probably to try to counteract their plummeting sales or something. Under slogans having to do with investing in one's culture and stuff, they're offering a new book each week for a relatively small price, and you're encouraged to buy them all to own the complete collection. While not bad in itself, this affair gets funny when the competition gets tough and the companies start getting really creative with their advertising. For instance, one collection is currently advertised along these lines: [display frog] For those who read, this is a future prince. For the others, it's just a frog. Yeah, pretty original, until they get to this week's book: The Marquis de Sade. WTF.
On a totally different thread, I've been wanting for a very long time to comment on dr. Michio Kaku's pet show Sci-Fi Science, which I also find very unfortunate. His take on the possible real-world implementation of various sci-fi memes is sometimes plausible, at few times interesting, at many times outrageous, and the show itself is worth watching if you're otherwise terribly bored. I personally liked him much more when he was making brief appearences in various science shows than as the star in his own project. On to the point:
1. About one in three 'problems' has negative matter as a solution. Enough with the negative matter that falls upwards, it's purely theoretical, there are some clues as to its possible existance, but for now it's pure speculation.
2. Let's make a sci-fi-style force field/shield, only it's not a force field it's a matter+laser shield. Reasonable, until the enemy spaceship attacks you with lasers, which your carbon-nanotube-or-whatever-future-material shield can't supposedly withstand. His idea - coat it with "photocromatic materials", which change color in response to light exposure, just like those adaptive sunglasses. Those are supposed to absorb the laser. Why on Earth would he use photocromatic materials instead of a mirror or nothing is beyond me. The energy absorbed by the shield with or without said materials is basically the same. It either melts or it doesn't. Maybe it absorbs more so that the laser doesn't pass through the shield and on to the ship? Who knows. That doesn't solve the shield melting problem though. It just looks like a half-baked hack with a lot of buzztech.
3. He suggests that teleportation might work by digitising a human, memories included, sending the data along a series of laser beams (x-ray laser beams IIRC, for the added coolness and information density) and reconstructing the human at the destination. He openly admits to this resulting in two identical humans, memories and personality included, but states that we've got enough time to work the kinks out of this problem. I find this "brute force" approach questionable and I've got a big problem with it. Would you like to be killed at point A after being copied to point B? There's got to be a more elegant solution. Even if it were possible to clone me with little error and come up with an identical self-aware being, the two of us would be disconnected. The new mind would be a different mind. Sure, to my friends I might look the same and they might never notice, but I sincerely doubt that what I call "me" would be the same. Kill the first body and the second would surely function OK as a new person with my exact same traits, but I strongly doubt that I'll awake inside it as if nothing happened.
And the list goes on.
There are of course the cool solutions such as the self-reconfigurable robot, but many of them are, as I said, unfortunate.
Some might label me pathetic for picking on a low-budget pop-sci entertainment show, but there's a deeper thought here. Some time ago being a geek was something to be proud of, as geeks could display high levels of skill and competence, and in a larger sense, a greater understanding of the world. Now there's a new breed of geek, the sci-fi/fantasy game geek, who also takes great pride in their passion but often times lacks the high levels of practical skills and only displays a great understanding of some fantasy world. It can of course be argued that this projects positively into the real world, but generally the fiction geek combines all the disadvantages of being a geek with none of the advanges of being a geek. Everyone who watched Sci-Fi Science would agree with me.
After all, some people watch a movie or read a book and enjoy it as such, some find parallels with human society, some dream of being princesses and frog-princes, and some dream of being Jedi wielding extendable porous ceramic lightsabres with nuclear batteries, adamantium cooling fans and superconducting plasma confinement magnets. Or something like that. There's nothing wrong with either case, and of course there's always money to be made.
On a totally different thread, I've been wanting for a very long time to comment on dr. Michio Kaku's pet show Sci-Fi Science, which I also find very unfortunate. His take on the possible real-world implementation of various sci-fi memes is sometimes plausible, at few times interesting, at many times outrageous, and the show itself is worth watching if you're otherwise terribly bored. I personally liked him much more when he was making brief appearences in various science shows than as the star in his own project. On to the point:
1. About one in three 'problems' has negative matter as a solution. Enough with the negative matter that falls upwards, it's purely theoretical, there are some clues as to its possible existance, but for now it's pure speculation.
2. Let's make a sci-fi-style force field/shield, only it's not a force field it's a matter+laser shield. Reasonable, until the enemy spaceship attacks you with lasers, which your carbon-nanotube-or-whatever-future-material shield can't supposedly withstand. His idea - coat it with "photocromatic materials", which change color in response to light exposure, just like those adaptive sunglasses. Those are supposed to absorb the laser. Why on Earth would he use photocromatic materials instead of a mirror or nothing is beyond me. The energy absorbed by the shield with or without said materials is basically the same. It either melts or it doesn't. Maybe it absorbs more so that the laser doesn't pass through the shield and on to the ship? Who knows. That doesn't solve the shield melting problem though. It just looks like a half-baked hack with a lot of buzztech.
3. He suggests that teleportation might work by digitising a human, memories included, sending the data along a series of laser beams (x-ray laser beams IIRC, for the added coolness and information density) and reconstructing the human at the destination. He openly admits to this resulting in two identical humans, memories and personality included, but states that we've got enough time to work the kinks out of this problem. I find this "brute force" approach questionable and I've got a big problem with it. Would you like to be killed at point A after being copied to point B? There's got to be a more elegant solution. Even if it were possible to clone me with little error and come up with an identical self-aware being, the two of us would be disconnected. The new mind would be a different mind. Sure, to my friends I might look the same and they might never notice, but I sincerely doubt that what I call "me" would be the same. Kill the first body and the second would surely function OK as a new person with my exact same traits, but I strongly doubt that I'll awake inside it as if nothing happened.
And the list goes on.
There are of course the cool solutions such as the self-reconfigurable robot, but many of them are, as I said, unfortunate.
Some might label me pathetic for picking on a low-budget pop-sci entertainment show, but there's a deeper thought here. Some time ago being a geek was something to be proud of, as geeks could display high levels of skill and competence, and in a larger sense, a greater understanding of the world. Now there's a new breed of geek, the sci-fi/fantasy game geek, who also takes great pride in their passion but often times lacks the high levels of practical skills and only displays a great understanding of some fantasy world. It can of course be argued that this projects positively into the real world, but generally the fiction geek combines all the disadvantages of being a geek with none of the advanges of being a geek. Everyone who watched Sci-Fi Science would agree with me.
After all, some people watch a movie or read a book and enjoy it as such, some find parallels with human society, some dream of being princesses and frog-princes, and some dream of being Jedi wielding extendable porous ceramic lightsabres with nuclear batteries, adamantium cooling fans and superconducting plasma confinement magnets. Or something like that. There's nothing wrong with either case, and of course there's always money to be made.
Sunday, April 17, 2011
aliens
Just about every popsci show I've seen in the last few years favors the idea of aliens being everywhere. I'm sick and tired of hearing "reputable scientists" utter the stereotypical sentencte: "The Universe is probably teeming with life". Just because a lot of extrasolar planets have been found lately and just because alcohol's been found in deep space (along with other organic chemicals such as aminoacids) and just because bacteria can live everywhere on Earth doesn't mean that life just appears everywhere there's water and heat. And then becomes intelligent. A few decades ago you didn't see this almost-consensus that aliens must exist with high probability. Now everyone's being disgustingly optimistic about "not being alone in the Universe".
There are a lot of problems with the whole extraterrestrial life issue.
First, you can't do statistics on a sample of one. Therefore, you can't scientifically predict anything about life elsewhere. If we were to find life on Mars or Jupiter's moons or wherever, we'd have a sample of 2, which would still be insufficient, but a lot better than 1. To be pedantic, we don't even have a clear, universal definition of life, or a clear method to identify it; we can only speculate that if it existed, it'd be similar to what we see on Earth because the physics and chemistry are the same everywhere.
Second, we are very limited in our capabilities to detect extraterrestrial life. Radio searches have so far yielded nothing and I personally doubt they ever will, because radio "leakeage" from aliens would be too weak to be detectable. The whole "our TV shows have already reached dozens of stars" is bullshit, the signals are too weak to be detectable. A 100 kilowatt radio source on Earth would shine just about 10^-24 watts of power on a generous alien antenna (one square kilometer) placed not very far away (10 light years), for the same reason that distant stars appear so dim to us. If that antenna were connected to an incredibly sensitive receiver, say cooled to a tenth of a degree above absolute zero, the electronic noise due to thermal motion would still be 1000 times stronger. They could probably barely receive Morse code, which takes a lot less bandwith than human speech. Ramp up the distance to 100 light years and the signal gets 100 more times weaker. So in order for the aliens to hear us, either they'd have to have incredibly advanced receiver technology, or our beam would have to be focused and directed towards them. We're faced with the same problem when trying to detect alien radio signals. We could probably detect a signal if it was being intentionally broadcast, but we haven't yet. This raises another problem: how many times, and for how long, did we transmit such signals into space? Not that many, not that long. Maybe the aliens are doing likewise.
What other means of detection could we use? Take artificial lighting for instance. City lights on Earth can be seen from space, and they have a very distinct spectral signature. Aliens would possibly also use artificial lighting at night, but light has the same problem as radio signals. Maybe if we had a telescope powerful enough to see planets around other stars, we'd be able to detect these hypothetical lights. At least we'd know what to look for, given that aliens would probably see in the same frequency range as we do, because their eyes or whatever they have would adapt to the spectrum of their star, which would be similar to ours. If we watched the planet from the right angle, we could possibly even see these lights turning on in the evening and off in the morning. The total power coming out of our lights is much bigger than the power from our radio transmitters, so things might be the same on their planet. Light is also easier to detect than decoding radio signals.
Another thing that comes to mind are nuclear explosions. Any sufficiently developed aliens would do them, even if just for testing. They would be strong enough to be detectable, but did we ever see any sudden flash of light near a star? Did we ever look for one? I have no idea.
Finally, contrary to what some may think, there's not a shred of physical evidence that aliens have ever visited us. That might be due to the difficulty of interstellar travel, but nonetheless it hasn't happened.
So yeah, even if aliens exist, they can't get to us and we can't get to them. Relativity, which is pretty much proven to model this world correctly, while not forbidding faster-than-light travel, predicts that such travel would result in grandfather paradoxes and such. We also can't talk to them, because information, however we send it, radio, lasers, X-rays, whatever, only travels so fast. Maybe in a "parallel reality" we could, but not in this one. So there. We are alone.
There are a lot of problems with the whole extraterrestrial life issue.
First, you can't do statistics on a sample of one. Therefore, you can't scientifically predict anything about life elsewhere. If we were to find life on Mars or Jupiter's moons or wherever, we'd have a sample of 2, which would still be insufficient, but a lot better than 1. To be pedantic, we don't even have a clear, universal definition of life, or a clear method to identify it; we can only speculate that if it existed, it'd be similar to what we see on Earth because the physics and chemistry are the same everywhere.
Second, we are very limited in our capabilities to detect extraterrestrial life. Radio searches have so far yielded nothing and I personally doubt they ever will, because radio "leakeage" from aliens would be too weak to be detectable. The whole "our TV shows have already reached dozens of stars" is bullshit, the signals are too weak to be detectable. A 100 kilowatt radio source on Earth would shine just about 10^-24 watts of power on a generous alien antenna (one square kilometer) placed not very far away (10 light years), for the same reason that distant stars appear so dim to us. If that antenna were connected to an incredibly sensitive receiver, say cooled to a tenth of a degree above absolute zero, the electronic noise due to thermal motion would still be 1000 times stronger. They could probably barely receive Morse code, which takes a lot less bandwith than human speech. Ramp up the distance to 100 light years and the signal gets 100 more times weaker. So in order for the aliens to hear us, either they'd have to have incredibly advanced receiver technology, or our beam would have to be focused and directed towards them. We're faced with the same problem when trying to detect alien radio signals. We could probably detect a signal if it was being intentionally broadcast, but we haven't yet. This raises another problem: how many times, and for how long, did we transmit such signals into space? Not that many, not that long. Maybe the aliens are doing likewise.
What other means of detection could we use? Take artificial lighting for instance. City lights on Earth can be seen from space, and they have a very distinct spectral signature. Aliens would possibly also use artificial lighting at night, but light has the same problem as radio signals. Maybe if we had a telescope powerful enough to see planets around other stars, we'd be able to detect these hypothetical lights. At least we'd know what to look for, given that aliens would probably see in the same frequency range as we do, because their eyes or whatever they have would adapt to the spectrum of their star, which would be similar to ours. If we watched the planet from the right angle, we could possibly even see these lights turning on in the evening and off in the morning. The total power coming out of our lights is much bigger than the power from our radio transmitters, so things might be the same on their planet. Light is also easier to detect than decoding radio signals.
Another thing that comes to mind are nuclear explosions. Any sufficiently developed aliens would do them, even if just for testing. They would be strong enough to be detectable, but did we ever see any sudden flash of light near a star? Did we ever look for one? I have no idea.
Finally, contrary to what some may think, there's not a shred of physical evidence that aliens have ever visited us. That might be due to the difficulty of interstellar travel, but nonetheless it hasn't happened.
So yeah, even if aliens exist, they can't get to us and we can't get to them. Relativity, which is pretty much proven to model this world correctly, while not forbidding faster-than-light travel, predicts that such travel would result in grandfather paradoxes and such. We also can't talk to them, because information, however we send it, radio, lasers, X-rays, whatever, only travels so fast. Maybe in a "parallel reality" we could, but not in this one. So there. We are alone.
Wednesday, March 30, 2011
power
Are you deeply concerned with pollution, global warming, nuke accidents and all the shit that comes with modern, power-hungry technology? Are you thinking green, feeling green, living green? Caring about the environment? Celebrating Earth Hour by switching off the lights and burning stuff? Or are you just concerned with your electricity bill, netbook battery, or living in Japan where the power grid's flaky after the quake?
Well, then use a goddamn low-power web browser while you surf for pr0n!
Well, then use a goddamn low-power web browser while you surf for pr0n!
Monday, September 27, 2010
chrome
Had to set up a little website and wanted to test it on my server which doesn't use port 80. Works great under Firefox, wanted to also test it in Chrome.
A few months ago a similar setup worked just fine, but it seems some c0der/suit/whatever got smart and now I get
The webpage at http://example.com:1234/ might be temporarily down or it may have moved permanently to a new web address. (Gee, really? It was there 30 seconds ago!)
More information on this error.
Below is the original error message
Error 312 (net::ERR_UNSAFE_PORT): Unknown error.
Hey, it's mah puter and I read whatever port I want, bitch!
Furthermore, it seems there's no easy way to disable this stupid behaviour.
Can I say "Fuck Chrome" on a Google-owned blogging platform? Ok, I won't say it.
LE: There actually is an easy way to enable a list of ports; my bad for stopping on "recompile from source" in the bug discussion. Thanks Lucian. Still stupid behaviour.
A few months ago a similar setup worked just fine, but it seems some c0der/suit/whatever got smart and now I get
The webpage at http://example.com:1234/ might be temporarily down or it may have moved permanently to a new web address. (Gee, really? It was there 30 seconds ago!)
More information on this error.
Below is the original error message
Error 312 (net::ERR_UNSAFE_PORT): Unknown error.
Hey, it's mah puter and I read whatever port I want, bitch!
Furthermore, it seems there's no easy way to disable this stupid behaviour.
Can I say "Fuck Chrome" on a Google-owned blogging platform? Ok, I won't say it.
LE: There actually is an easy way to enable a list of ports; my bad for stopping on "recompile from source" in the bug discussion. Thanks Lucian. Still stupid behaviour.
Tuesday, August 17, 2010
research 2
Look on the fourth page in this pdf, which is published in a scientific journal by someone who's a scientific doctor. Look at Figure 3. Yo dawg, I heard you like screenshots so I put a screenshot in your screenshot so you can copy while you paste!
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