I think the "you're saying that as though it's a bad thing" is all on your side. Personally I think using actual data and some objectivity is an awesome idea, for identifying potential smugglers AND targeting security searches. Far better than what they're doing now. I get everything from forty minute "interviews" to handcuffed at gunpoint because I share a very common name with someone they want. Except the other guy doesn't have the same nationality, passport number, birth date... skin colour.
Deep fried food is quite popular. And boiling it in oil certainly makes it moist. Try boiling butter sometime and see if that's even more popular. It's supposed to be the top three secrets to French cuisine after all.
You think they're looking for terrorists? Notice the part where they're analyzing data they get after the flight has left? They're looking for smugglers, illegal aliens and other undesirables, who are prevalent enough that stats will probably help them immensely.
If CP is violated then T has to be as well. T violation, no matter how small or obscure (and the one the story is about is pretty obscure) gives time a defined direction.
If you're wondering why T needs to be violated when C can't be, you've got the requirements backwards. If CPT is to be preserved as a symmetry and you change P then you have to either change C or T to compensate. If you can't change C, then you HAVE to change T. What you'd end up with is a slight preference for photons with a particular parity going forward in time.
Yes, they screwed up with their settlement program. They should have cleared everyone out of the occupied territories and made them proper no man's lands.
It's funny, I was having this discussion with the daughter of Greek expats yesterday morning. Her parents were forcibly moved as part of the population exchange between Greece and Turkey. It wasn't nice for them to lose their home but in the end it worked out best for everyone.
People think of the current situation between the Israelis and Palestinians as a result of Israel's occupation though. It's not. The Palestinians (and others) were bombing Israel before 1967. The only difference is that Israel can control the flow of weapons into Palestine moderately better now.
Hey, we could discover that God exists too. That would be earthshaking! Why think so small with pitiful aliens when you can dream of discovering omnipotent beings?
I guess when you said "dream" you really meant it literally. Meanwhile some of us would like to maintain at least a tenuous grip on reality.
Oh, and just to address the rest of your statement:
The Standard Model can incorporate baryogenesis, though the amount of net baryons (and leptons) thus created may not be sufficient to account for the present baryon asymmetry; this issue has not yet been determined decisively. Baryogenesis within the Standard Model requires the electroweak symmetry breaking be a first-order phase transition, since otherwise sphalerons wipe off any baryon asymmetry that happened up to the phase transition, while later the amount of baryon non-conserving interactions is negligible. [7] The phase transition domain wall breaks the P-symmetry spontaneously, allowing for CP-symmetry violating interactions to create C-asymmetry on both its sides: quarks tend to accumulate on the broken phase side of the domain wall, while anti-quarks tend to accumulate on its unbroken phase side. This happens as follows:[5] Due to CP-symmetry violating electroweak interactions, some amplitudes involving quarks are not equal to the corresponding amplitudes involving anti-quarks, but rather have opposite phase (see CKM matrix and Kaon); since time reversal takes an amplitude to its complex conjugate, CPT-symmetry is conserved.
For the subscription impaired, the summary from Wikipedia:
In 1967, Andrei Sakharov proposed[2] a set of three necessary conditions that a baryon-generating interaction must satisfy to produce matter and antimatter at different rates. These conditions were inspired by the recent discoveries of the cosmic background radiation [3] and CP-violation in the neutral kaon system. [4] The three necessary "Sakharov conditions" are: Baryon number violation. C-symmetry and CP-symmetry violation. Interactions out of thermal equilibrium.
And we have no imagination? The discovery of good evidence for life originating on another planet would be one of the biggest discoveries humanity has ever made.
There's a wee bit of difference between a shitty Hamas rocket that occasionally actually traverses a few miles and hits something that might count as a target and an intercontinental ballistic missile. Speed, for one. Decoys, for another.
Strangely, it's more complicated than that. Isreal was attacked more than once by it's neighbours before 1967. It's not really unreasonable for them to want a buffer zone they control access to around their main populated region.
As far as the laws of physics are concerned, you can "move" either way in time and it doesn't make any difference (except for small violations like this one). It's just that you only remember going one way. For some reason we remember "back" in time, when entropy was lower.
I'll paraphrase it: sitting in your chair you experience a distinct difference between "up" and "down." Things fall down, not up. You feel pulled down, not up. However, that difference is due only to special conditions at your current position in space. If you move to the other side of the world your up and down will be swapped. If you go far enough out in space, or into orbit, up and down disappear. Time is the same way except instead of a big mass on one side causing a gravity gradient in space it's the big bang on one side causing an entropy gradient in time.
Sure, but you can logically describe why it might be bad to show a porn video to your kids versus pictures of the Venus de Milo. If you can describe it logically, you can tell an algorithm (or a poorly paid Indian who has to look at nasty Facebook pictures all day) how to differentiate.
Can you describe the moral (or practical) difference between, say, The Three Graces, and a still from a spring break or Mardi Gras party?
"it has essentially no effect on the world we see around us."
Well, except for being necessary for CP violation, which in turn is the only way we have of explaining why there isn't much antimatter around.
So it does explain why the planet is here and doesn't experience nuclear-style detonations many times an hour as antimatter grains of dust hit the atmosphere. But other than that no effect on the world around us.
No, they watched particles "decaying" in one way versus ones "decaying" in the opposite direction. The second process would be identical to the first if you were running time backwards.
The arrow of time refers to the fact that we perceive a difference between the past and the future: we remember the past, but not the future. That's explained adequately by noting that entropy tends to increase and the universe, for some reason, was in a low entropy state in the past.
What they've found is that, at least for b-mesons, going forward in time is different than going backward in time, presumably in addition to the rest of the universe accumulating entropy. It's as if there was a fundamental difference between moving "north" and moving "south" in empty space.
Everyone here seems to think this is a bad thing. I disagree. Facebook et. al. are just applying what the majority THINK is their moral code, strictly. Most parents don't want pictures of boobies posted where their children can see them. Fine - no pictures of topless women, drawings of Adam and Eve, or the Venus de Milo ( Aphrodite de Milos). Oh wait, that's not what you meant?
The summary says the policies are arbitrary. They're not. Just the opposite. And it exposes the ridiculousness of our double standards.
Slashdot Mirror
I think the "you're saying that as though it's a bad thing" is all on your side. Personally I think using actual data and some objectivity is an awesome idea, for identifying potential smugglers AND targeting security searches. Far better than what they're doing now. I get everything from forty minute "interviews" to handcuffed at gunpoint because I share a very common name with someone they want. Except the other guy doesn't have the same nationality, passport number, birth date... skin colour.
Deep fried food is quite popular. And boiling it in oil certainly makes it moist. Try boiling butter sometime and see if that's even more popular. It's supposed to be the top three secrets to French cuisine after all.
Very good, reply to the RTFA comment without RTFA.
The island appeared on their nautical charts, which is the original reason they went to see.
You think they're looking for terrorists? Notice the part where they're analyzing data they get after the flight has left? They're looking for smugglers, illegal aliens and other undesirables, who are prevalent enough that stats will probably help them immensely.
If CP is violated then T has to be as well. T violation, no matter how small or obscure (and the one the story is about is pretty obscure) gives time a defined direction.
If you're wondering why T needs to be violated when C can't be, you've got the requirements backwards. If CPT is to be preserved as a symmetry and you change P then you have to either change C or T to compensate. If you can't change C, then you HAVE to change T. What you'd end up with is a slight preference for photons with a particular parity going forward in time.
Yes, they screwed up with their settlement program. They should have cleared everyone out of the occupied territories and made them proper no man's lands.
It's funny, I was having this discussion with the daughter of Greek expats yesterday morning. Her parents were forcibly moved as part of the population exchange between Greece and Turkey. It wasn't nice for them to lose their home but in the end it worked out best for everyone.
People think of the current situation between the Israelis and Palestinians as a result of Israel's occupation though. It's not. The Palestinians (and others) were bombing Israel before 1967. The only difference is that Israel can control the flow of weapons into Palestine moderately better now.
Hey, we could discover that God exists too. That would be earthshaking! Why think so small with pitiful aliens when you can dream of discovering omnipotent beings?
I guess when you said "dream" you really meant it literally. Meanwhile some of us would like to maintain at least a tenuous grip on reality.
Oh, and just to address the rest of your statement:
http://en.wikipedia.org/wiki/Baryogenesis#Baryogenesis_within_the_Standard_Model
Hm...
http://mr.crossref.org/iPage/?doi=10.1070%2FPU1991v034n05ABEH002497
For the subscription impaired, the summary from Wikipedia:
Photons interact with each other and other things. The idea of photons and CP violation is being explored:
http://prd.aps.org/abstract/PRD/v79/i6/e065020
http://arxiv.org/abs/hep-ph/9405203
Bacteria that used arsenic instead of phosphorous in it's DNA would be alien life of a sort.
"Life...meh. Water...meh"
And we have no imagination? The discovery of good evidence for life originating on another planet would be one of the biggest discoveries humanity has ever made.
"I didn't know the Scientist wanted to get paid a quarter every time someone reads about a result."
That would be awesome. I could finally afford some actual vegetables to stir into the ramen noodles.
I'm guessing methane. But yes, no matter what it is, joe public (which includes post-2000 Slashdot where science is concerned) will be disappointed.
They tried that. A few times. It's missile stop rate was much less than 90%.
There's a wee bit of difference between a shitty Hamas rocket that occasionally actually traverses a few miles and hits something that might count as a target and an intercontinental ballistic missile. Speed, for one. Decoys, for another.
Strangely, it's more complicated than that. Isreal was attacked more than once by it's neighbours before 1967. It's not really unreasonable for them to want a buffer zone they control access to around their main populated region.
As far as the laws of physics are concerned, you can "move" either way in time and it doesn't make any difference (except for small violations like this one). It's just that you only remember going one way. For some reason we remember "back" in time, when entropy was lower.
Another poster had the best analogy I've heard: http://science.slashdot.org/comments.pl?sid=3261471&cid=42034773.
I'll paraphrase it: sitting in your chair you experience a distinct difference between "up" and "down." Things fall down, not up. You feel pulled down, not up. However, that difference is due only to special conditions at your current position in space. If you move to the other side of the world your up and down will be swapped. If you go far enough out in space, or into orbit, up and down disappear. Time is the same way except instead of a big mass on one side causing a gravity gradient in space it's the big bang on one side causing an entropy gradient in time.
Sure, but you can logically describe why it might be bad to show a porn video to your kids versus pictures of the Venus de Milo. If you can describe it logically, you can tell an algorithm (or a poorly paid Indian who has to look at nasty Facebook pictures all day) how to differentiate.
Can you describe the moral (or practical) difference between, say, The Three Graces, and a still from a spring break or Mardi Gras party?
Since photons do not routinely experience CP violation they also behave the same way forward and backwards in time.
"it has essentially no effect on the world we see around us."
Well, except for being necessary for CP violation, which in turn is the only way we have of explaining why there isn't much antimatter around.
So it does explain why the planet is here and doesn't experience nuclear-style detonations many times an hour as antimatter grains of dust hit the atmosphere. But other than that no effect on the world around us.
No, they watched particles "decaying" in one way versus ones "decaying" in the opposite direction. The second process would be identical to the first if you were running time backwards.
The arrow of time refers to the fact that we perceive a difference between the past and the future: we remember the past, but not the future. That's explained adequately by noting that entropy tends to increase and the universe, for some reason, was in a low entropy state in the past.
What they've found is that, at least for b-mesons, going forward in time is different than going backward in time, presumably in addition to the rest of the universe accumulating entropy. It's as if there was a fundamental difference between moving "north" and moving "south" in empty space.
Everyone here seems to think this is a bad thing. I disagree. Facebook et. al. are just applying what the majority THINK is their moral code, strictly. Most parents don't want pictures of boobies posted where their children can see them. Fine - no pictures of topless women, drawings of Adam and Eve, or the Venus de Milo ( Aphrodite de Milos). Oh wait, that's not what you meant?
The summary says the policies are arbitrary. They're not. Just the opposite. And it exposes the ridiculousness of our double standards.
Ask the game companies who used to do MMORPGs with validation and anti-cheating in the client how well that works.