In 1935, Einstein met with Boris Podolsky and Nathan Rosen to formulate a theory which basically said that particles intrinsically possess certain properties before these properties are measured. a "side effect" of the theory is known as the Einstein Podolsky Rosen Paradox (EPR Paradox).
Suppose you entangled a pair of photons polarised at 90 degrees to each other. You can't know what the polarisations are until you measure them; they could be vertical, horizontal or any angle in between. All you do know for sure is that they are perpendicular to each other. You send these photons off in different directions. At some point as they shoot off into the distance the photons will run into polarising filters you've cunningly put in their path.
Suppose one photon passes straight through a vertically aligned filter. It must be vertically polarised, so its partner must be horizontally polarised. The second photon would therefore pass through any horizontal filter in its way, but not through a vertical filter. So far so good. One photon is vertically polarised, the other is horizontally polarised, so they are at right angles as they should be, and all's well with the world.
Not quite. Until the first photon hits the filter, you have no idea whether it will go through or not. And for that matter, the photon doesn't know, what sort of filter it is going to hit until it gets there. Since you know nothing about either photon's individual polarisation until you make a measurement, you only know that the odds of it going through are fifty-fifty, no matter what angle the filter is set at. So the second photon can't know what the first photon will do until it actually does it. Yet the actions of the first photon determine the actions of the second. The second photon has to get some sort of tip-off from the first, even though they are physically a long way from each other.
What's more, this tip-off has to be instantaneous, because it has to work even if the two photons hit their filters at exactly the same time. It's impossible to predict what either photon will do, and yet the two of them must act in concert so that their polarisations have the correct relationship to each other. This is the "spookiness" that Einstein, Podolsky, and Rosen took such exception to.
gave the area of compression algorithms in mathematics something of a kick in the ass, so to speak. IANAMathematician but Galileo doesuse some extremely clever tricks to achieve its mission. Three main types of compression functions are used:
1.)a low-complexity integer cosine transform algorithm, which is an integer-based version of discret cosine transform (ie. JPEG)compression, ICT algorithm, this is new and was developed at JPL.
2.) 2x2 summation mode (which includes a factor of 2 hit on resolution).
3.) Bit Adaptive, Rate-Controlled compression(BARC) a lossless compression
A science virtual machine was created in the the command and data subsystem(main computer) and integrated into the existing operating system to support editing, compression, and packetization of the science data. So Galileo was REPROGRAMMED FROM EARTH (using an upload speed of about 10 bits/second!!) on it's way to Jupiter, with the new compression algorithms. I think those scientists deserve a huge amount of credit for thier achievments.
i mistakenly inserted an apostrophe, so friggin shoot me! i know the difference between it's=it is and its. but i still made the mistake WHY? because i was interested in the science not the grammar. you should feel lucky in the story i even used commas and capitals!:o]
unless of course the reflection off the surface is specular[(like a mirror)(and therefore would preserve the energy density of the initially thin-powerful laser beam)] and not diffuse. but big buildings don't have any surfaces which can cause spec......oh wait.
Re: So what IS porn? .....Can YOU define it?
on
Mandated Mediocrity
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· Score: 2
"As I've mentioned in earlier Slashdot posts, the most simple and elegant solution I've been able to think of is to require porn sites or sites with adult content to have different TDLs like.xxx or maybe.N17 - then filtering programs become unnecessary - you just set browsers not to allow those sites..."
I don't know what porn is for sure. Do you? Is Hustler porn? Is Playboy or 'Fratjock' magazine porn? Probably, but what about the Sports Illustrated swimsuit edition? Or nude renaissance paintings and sculptures? Some people think they are. What about Robert Maplethorpe photography? Will sex education resources have to be considered "porn" because some prude on the board that makes the.xxx decisions thinks it is(this happens in school librarys more often than you'd think)?
If you define porn as something that is meant purely for entertainment purposes and contains no informational value, then who decides what has information in it!? Who are you to say I cannot derive information to write a paper like "the effect of pornographic media sales in the early '90's on the entertainment industry as a whole" by using content information from Swank magazine! You can't!
false. the pricipal fusion reaction is D+T=He+N+energy, the Tritium is created in situ in the bomb from Neutron irradiation of Lithium Duteride. The Li absorbs a neutron and decomposes into Tritium via alpha emission. The tremendous x-ray photon pressure/temperature then initiates the D+T reaction.
uh. i'm going to go out on a limb and suggest that you and your friend burned yourselves on the sand which was being heated by the "hot summer sun". sand can easily reach over 150C on a summer day, easily capable of producing nasty burns. the nuclear radiation needed to give you the burns youre talking about would have to be UNBELIEVEABLY high for a public beach and you would've almost certainly noticed other effects at the dosage necissary to create burns like that; notably hair falling out, nausea-puking your guts out, and diahreaa. you did not burn yourself on "radioactive sand" you burned yourself on hot sand.
Now where have I seen this before...? Oh yeah, thats right, on Slashdot.:o] at least check the category youre posting under to see if that story has been run within the past WEEK!
In fact I would go so far as to say it's already over, the show died sometime last season. I've been a loyal fan since '92 but it's painfully obvious that the show has gone down in quality so severely ever since Conan left, that it is now in such a sad state I can barely bring myself to watch an entire episode without cringing. The jokes have become deadpan, predictable and witless. It's time to cancel The Simpsons and put Off to rest.
why isn't anyone replying to this? this is easily the most interesting post iv'e seen this week(granted it is monday).
"Given the same total amount of energy being transmitted, a narrower bandwidth means a higher peak intensity of electric and magnetic fields. Therefore, wouldn't the GSM ones be more likely to cause adverse non-thermal effects in surrounding devices?"
my first inclination would be to think it might be the other way around. possibly.... of course i may have no clue on this one and if so correct me. but.....
assuming the CDMA phones have a broader bandwidth wouldn't they have a greater chance of matching the vibrational mode of a particular protein with a certian molecualr weight; and therefore denaturing a larger variety of possibly important enzymes/hormones etc? also would the spectral purity of the cell phone emission really have any effect on the total amount of absorbed energy anyway? i think the answer to the first question might be answered by finding out how much energy per protein molecule it takes to break enough hydrogen bonds between alpha helices/beta sheets etc. to actually cause it to deform(denature) and if a cell phone cannot exceed the minimum requirement to do that, then it would be safe to assume it is not causing damage.
anyway i dont know the answer to that but thanx for making me think today.
"On the supply side, Governor Bush will improve interdiction and stop drugs before they reach our children. He will use better intelligence and surveillance to track and catch drug smugglers before they reach our borders."
oh yes, wont somebody Please think of the children! As everyone knows, all the domestic policies of this country sould revolve solely around what's best for The Children(tm). And where have I heard this tactic of 'stopping up the flow of drugs at the border' before? hmm Reagan? Bush(sr.)? and now where is the money spent on those idiotic and completely innefective policies? thats right. wasted, gone forever. maybe it's time to rethink 30 years of useless prohibition, TREAT addicts and actually allow the citizens of this so called free country to do what they wish with their own bodies. ie. im voting for Browne
hmm, I dont know about mp3's but im sure you could stream video pretty well at that speed...and all that bandwith is going to have to be put to SOME kind of good use...Everyone knows that the ISS is billions over budget...I think we can all agree it's only a matter of time before they put two and two together to figure out how to pay it back.
Is it still really necesary for news agencies to make this stupid comment every time a shuttle goes up? it's speed relative to the earth is 5mi/sec but WHO CARES, that is almost totally irrelevant when it's orbiting/docking.
Traveling only a few miles an HOUR when it finally docs with ISS. I mean, I handed someone a piece of paper tooday while we "hurtled through space orbiting the sun at about 30km/sec" right? oooo..daring, you say? NO! Because your frame of refrence was EARTH not the solar system!
The power density is high for this material, NOT the ENERGY DENSITY. Power density is a measurement of high-current discharge per unit of time per unit of volume(or weight).
The power density for these devices is in excess of 1,000 Watts/Kg, much higher than the few hundred for lead acids/NiCd's etc. Although--- the energy density of the NEC proton batteries is still rather dissapointing at 10-15 WattHours/Kg compared to the 20-30 WattHours/Kg of lead-acids'. But since it's such a new technology IMHO there is much prospect for improvment in this area, and getting competitive(in terms of batteries) energy densities out of these things is only a matter of time.
Re: It's probably just an amusing legend.
on
Nobel Prizes
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· Score: 1
You might note that Alfred Nobel was never married! Though he did have a mistress named Sophie Hess. It seems to be something of an urban legend that Nobel held a grudge against mathematicians because one supposedly screwed around with his wife on the side. Go here to hear it from the horses' mouth(taken from the sci.math newsgroup).
uhm. Einstein died in 1955. And Alexander Friedmann (the physicist who first implied the Big Bang from the complete solution of Einsteins equations) is also LONG since dead(like 1920's or something). Arno Penzias and Robert Wilson who discovered the cosmic microwave background radiation (taken as direct evidence of the big bang in the form of leftover EM radiation) at Bell Labs in 1965, were granted their nobel in 1978. George Gamow who predicted the CMBE was scooped by the Bell Labs team and never got his nobel, he's also very dead.
"ghosting" only occurs in DSTN LCD's [Dual Scan STN (Super Twist Nematic) Liquid Crystal Displays] because of the relaxation time for the LC molecule. TFT (Thin Film Transistor) LCD's "force" the molecule to 'unalign' fast when switched off using a voltage potential. hence fast switching hence....no ghosts.
that's the plan come mid december i think. right now, Cassini is about 50 Million Miles from Jupiter, that's nowhere near Jupiters magnetosphere/bow shock. In it's orbit Galileo just left the magnetosphere around jupiter (this past July) for the first time since it arrived in 1996. It was somewhere around 15 Mil. Miles when it did so. The particle/plasma science expiraments will probably be switched on to gather data when Cassini gets closer to the boundary between Jupiters magnetic field and the solar wind.
you could not have possibly seen it "just as nice" in your telescope. the resolution of the cassini image is taken at 500Km/pixel, you aren't coming anywhere near that with your crappy little Tasco in the back yard.
i think you would end up defeating the purpose of using mercury to make bigger reflectors(and therefore collect more light) b/c the only time a primary reflector could be used is the tiny fraction of a second when it is pointed in the proper direction during its rotation on the gimbal(not the mercury dish's axis) and would therefore only be gathering a tiny amount of light per minute. even if you used many small mercury dishes i dont think it would work due to the extremely small time you could leave the aperature open because of the very small (arcseconds at most) area being viewed.
Re:NASA crowds out real private spacecraft again..
on
X-33 Shuttle Problems
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· Score: 1
by the way, what ever happened to roton anyway? that looked like a really clever design. last year they were doing successful (and manned) flight tests with a prototype, they even had the rocket engines working smoothly if i remember right. now nothing.
Slashdot Mirror
In 1935, Einstein met with Boris Podolsky and Nathan Rosen to formulate a theory which basically said that particles intrinsically possess certain properties before these properties are measured. a "side effect" of the theory is known as the Einstein Podolsky Rosen Paradox (EPR Paradox).
Suppose you entangled a pair of photons polarised at 90 degrees to each other. You can't know what the polarisations are until you measure them; they could be vertical, horizontal or any angle in between. All you do know for sure is that they are perpendicular to each other. You send these photons off in different directions. At some point as they shoot off into the distance the photons will run into polarising filters you've cunningly put in their path.
Suppose one photon passes straight through a vertically aligned filter. It must be vertically polarised, so its partner must be horizontally polarised. The second photon would therefore pass through any horizontal filter in its way, but not through a vertical filter. So far so good. One photon is vertically polarised, the other is horizontally polarised, so they are at right angles as they should be, and all's well with the world.
Not quite. Until the first photon hits the filter, you have no idea whether it will go through or not. And for that matter, the photon doesn't know, what sort of filter it is going to hit until it gets there. Since you know nothing about either photon's individual polarisation until you make a measurement, you only know that the odds of it going through are fifty-fifty, no matter what angle the filter is set at. So the second photon can't know what the first photon will do until it actually does it. Yet the actions of the first photon determine the actions of the second. The second photon has to get some sort of tip-off from the first, even though they are physically a long way from each other.
What's more, this tip-off has to be instantaneous, because it has to work even if the two photons hit their filters at exactly the same time. It's impossible to predict what either photon will do, and yet the two of them must act in concert so that their polarisations have the correct relationship to each other. This is the "spookiness" that Einstein, Podolsky, and Rosen took such exception to.
gave the area of compression algorithms in mathematics something of a kick in the ass, so to speak. IANAMathematician but Galileo doesuse some extremely clever tricks to achieve its mission. Three main types of compression functions are used:
1.)a low-complexity integer cosine transform algorithm, which is an integer-based version of discret cosine transform (ie. JPEG)compression, ICT algorithm, this is new and was developed at JPL.
2.) 2x2 summation mode (which includes a factor of 2 hit on resolution).
3.) Bit Adaptive, Rate-Controlled compression(BARC) a lossless compression
A science virtual machine was created in the the command and data subsystem(main computer) and integrated into the existing operating system to support editing, compression, and packetization of the science data. So Galileo was REPROGRAMMED FROM EARTH (using an upload speed of about 10 bits/second!!) on it's way to Jupiter, with the new compression algorithms. I think those scientists deserve a huge amount of credit for thier achievments.
i mistakenly inserted an apostrophe, so friggin shoot me! i know the difference between it's=it is and its. but i still made the mistake WHY? because i was interested in the science not the grammar. you should feel lucky in the story i even used commas and capitals! :o]
unless of course the reflection off the surface is specular[(like a mirror)(and therefore would preserve the energy density of the initially thin-powerful laser beam)] and not diffuse. but big buildings don't have any surfaces which can cause spec......oh wait.
"As I've mentioned in earlier Slashdot posts, the most simple and elegant solution I've been able to think of is to require porn sites or sites with adult content to have different TDLs like .xxx or maybe .N17 - then filtering programs become unnecessary - you just set browsers not to allow those sites..."
.xxx decisions thinks it is(this happens in school librarys more often than you'd think)?
I don't know what porn is for sure. Do you? Is Hustler porn? Is Playboy or 'Fratjock' magazine porn? Probably, but what about the Sports Illustrated swimsuit edition? Or nude renaissance paintings and sculptures? Some people think they are. What about Robert Maplethorpe photography? Will sex education resources have to be considered "porn" because some prude on the board that makes the
If you define porn as something that is meant purely for entertainment purposes and contains no informational value, then who decides what has information in it!? Who are you to say I cannot derive information to write a paper like "the effect of pornographic media sales in the early '90's on the entertainment industry as a whole" by using content information from Swank magazine! You can't!
parachutes are simple and *relatively lightweight enough to make things safe at a reasonable cost of fuel efficiency.
false. the pricipal fusion reaction is D+T=He+N+energy, the Tritium is created in situ in the bomb from Neutron irradiation of Lithium Duteride. The Li absorbs a neutron and decomposes into Tritium via alpha emission. The tremendous x-ray photon pressure/temperature then initiates the D+T reaction.
uh. i'm going to go out on a limb and suggest that you and your friend burned yourselves on the sand which was being heated by the "hot summer sun". sand can easily reach over 150C on a summer day, easily capable of producing nasty burns. the nuclear radiation needed to give you the burns youre talking about would have to be UNBELIEVEABLY high for a public beach and you would've almost certainly noticed other effects at the dosage necissary to create burns like that; notably hair falling out, nausea-puking your guts out, and diahreaa. you did not burn yourself on "radioactive sand" you burned yourself on hot sand.
Now where have I seen this before...? Oh yeah, thats right, on Slashdot. :o] at least check the category youre posting under to see if that story has been run within the past WEEK!
In fact I would go so far as to say it's already over, the show died sometime last season. I've been a loyal fan since '92 but it's painfully obvious that the show has gone down in quality so severely ever since Conan left, that it is now in such a sad state I can barely bring myself to watch an entire episode without cringing. The jokes have become deadpan, predictable and witless. It's time to cancel The Simpsons and put Off to rest.
It makes no difference who you vote for. Either way, this planet is doomed.... DOOMED!
That said, I'm voting for Kodos.
why isn't anyone replying to this? this is easily the most interesting post iv'e seen this week(granted it is monday).
"Given the same total amount of energy being transmitted, a narrower bandwidth means a higher peak intensity of electric and magnetic fields. Therefore, wouldn't the GSM ones be more likely to cause adverse non-thermal effects in surrounding devices?"
my first inclination would be to think it might be the other way around. possibly.... of course i may have no clue on this one and if so correct me. but.....
assuming the CDMA phones have a broader bandwidth wouldn't they have a greater chance of matching the vibrational mode of a particular protein with a certian molecualr weight; and therefore denaturing a larger variety of possibly important enzymes/hormones etc? also would the spectral purity of the cell phone emission really have any effect on the total amount of absorbed energy anyway? i think the answer to the first question might be answered by finding out how much energy per protein molecule it takes to break enough hydrogen bonds between alpha helices/beta sheets etc. to actually cause it to deform(denature) and if a cell phone cannot exceed the minimum requirement to do that, then it would be safe to assume it is not causing damage.
anyway i dont know the answer to that but thanx for making me think today.
"On the supply side, Governor Bush will improve interdiction and stop drugs before they reach our children. He will use better intelligence and surveillance to track and catch drug smugglers before they reach our borders." oh yes, wont somebody Please think of the children! As everyone knows, all the domestic policies of this country sould revolve solely around what's best for The Children(tm). And where have I heard this tactic of 'stopping up the flow of drugs at the border' before? hmm Reagan? Bush(sr.)? and now where is the money spent on those idiotic and completely innefective policies? thats right. wasted, gone forever. maybe it's time to rethink 30 years of useless prohibition, TREAT addicts and actually allow the citizens of this so called free country to do what they wish with their own bodies. ie. im voting for Browne
hmm, I dont know about mp3's but im sure you could stream video pretty well at that speed...and all that bandwith is going to have to be put to SOME kind of good use...Everyone knows that the ISS is billions over budget...I think we can all agree it's only a matter of time before they put two and two together to figure out how to pay it back.
Is it still really necesary for news agencies to make this stupid comment every time a shuttle goes up? it's speed relative to the earth is 5mi/sec but WHO CARES, that is almost totally irrelevant when it's orbiting/docking.
Traveling only a few miles an HOUR when it finally docs with ISS. I mean, I handed someone a piece of paper tooday while we "hurtled through space orbiting the sun at about 30km/sec" right? oooo..daring, you say? NO! Because your frame of refrence was EARTH not the solar system!
The power density is high for this material, NOT the ENERGY DENSITY. Power density is a measurement of high-current discharge per unit of time per unit of volume(or weight).
The power density for these devices is in excess of 1,000 Watts/Kg, much higher than the few hundred for lead acids/NiCd's etc. Although--- the energy density of the NEC proton batteries is still rather dissapointing at 10-15 WattHours/Kg compared to the 20-30 WattHours/Kg of lead-acids'. But since it's such a new technology IMHO there is much prospect for improvment in this area, and getting competitive(in terms of batteries) energy densities out of these things is only a matter of time.
There is an article in the "Nikkei BP AsiaBizTech" site here: http://www.nikkeib p.a siabiztech.com/nea/200008/cmpo_108677.html
You might note that Alfred Nobel was never married!
Though he did have a mistress named Sophie Hess. It seems to be something of an urban legend that Nobel held a grudge against mathematicians because one supposedly screwed around with his wife on the side. Go here to hear it from the horses' mouth(taken from the sci.math newsgroup).
uhm. Einstein died in 1955. And Alexander Friedmann (the physicist who first implied the Big Bang from the complete solution of Einsteins equations) is also LONG since dead(like 1920's or something). Arno Penzias and Robert Wilson who discovered the cosmic microwave background radiation (taken as direct evidence of the big bang in the form of leftover EM radiation) at Bell Labs in 1965, were granted their nobel in 1978. George Gamow who predicted the CMBE was scooped by the Bell Labs team and never got his nobel, he's also very dead.
"ghosting" only occurs in DSTN LCD's [Dual Scan STN (Super Twist Nematic) Liquid Crystal Displays] because of the relaxation time for the LC molecule. TFT (Thin Film Transistor) LCD's "force" the molecule to 'unalign' fast when switched off using a voltage potential. hence fast switching hence....no ghosts.
that's the plan come mid december i think. right now, Cassini is about 50 Million Miles from Jupiter, that's nowhere near Jupiters magnetosphere/bow shock. In it's orbit Galileo just left the magnetosphere around jupiter (this past July) for the first time since it arrived in 1996. It was somewhere around 15 Mil. Miles when it did so. The particle/plasma science expiraments will probably be switched on to gather data when Cassini gets closer to the boundary between Jupiters magnetic field and the solar wind.
note to the person who thinks he's not ignorant: jupiters core is made of liquid metallic hydrogen. no rocky core. its too hot.
you could not have possibly seen it "just as nice" in your telescope. the resolution of the cassini image is taken at 500Km/pixel, you aren't coming anywhere near that with your crappy little Tasco in the back yard.
i think you would end up defeating the purpose of using mercury to make bigger reflectors(and therefore collect more light) b/c the only time a primary reflector could be used is the tiny fraction of a second when it is pointed in the proper direction during its rotation on the gimbal(not the mercury dish's axis) and would therefore only be gathering a tiny amount of light per minute. even if you used many small mercury dishes i dont think it would work due to the extremely small time you could leave the aperature open because of the very small (arcseconds at most) area being viewed.
by the way, what ever happened to roton anyway? that looked like a really clever design. last year they were doing successful (and manned) flight tests with a prototype, they even had the rocket engines working smoothly if i remember right. now nothing.
i doubt it. i'm queer. that means you never have to ask twice.