About the only thing certain about those entanglement experiments is that there are no hidden local variables, so we know there is some sort of link between entangled particles that seems to work in spooky FTL ways. But no actual controllable information has been transferred FTL. Sure, quantum states of particles may have been, but we don't get to choose those without breaking the link, so it's useless as a communication medium. There's some ideas out there that MAY be able to exploit the statistical nature of the experiments to do it, but thus far we're stuck with c as an upper limit
Apple's biggest problem is that Jobs is always pushing an agenda, and as a result crippling an amazing device. Does it really take that much space to include a SD card slot, a USB jack, or a webcam? (even my cell phone has all those). Is it really going to hurt the user experience to allow Flash or my own applications? The answer of course is no to all these.
That was really irritating to me. Before the switchover, all the digital channels were UHF and I could receive them fine with a nice compact antenna on every floor, which was great. After the switch, some shifted back to VHF and we're back to rabbit ear combos again, and the lower floors get bad signals. Will probably have to add an attic antenna but I'm dreading crawling around up there and fishing cable through the walls.
Seconded! I have seen this same nonsense with the ION and CW networks here, especially with audio and video that never quite sync up. It happens on the cable feed too, though it has gotten better lately (maybe enough people finally noticed and complained)
Where you can elevate highways, build tunnels underground, and/or stack roads to increase the number of lanes. Seattle, Boston, Omaha, San Francisco and San Antonio, among others have this figured out
In retrospect, I should have said measure or not measure in a particular way. So Bob is always measuring groups of photons, and Alice continually shifts the way she measures groups to send a message. You are correct that whoever measures thus ends the entanglement UNLESS they do it in a way that doesn't allow them to get any information. Take for example a variation on the quantum eraser experiment (I chose this one because it has a very intuitive diagram and IMO is a fascinating experiment):
A person can choose whether to measure the particles in a way that preserves the path information, or one that doesn't. This is where the spooky effect comes in, because if you measure in a way that preserves the which-way path information, the interference disappears, but if you make it such that it's impossible to tell, interference takes place. In that particular case though, without the coincidence counter you can't see anything other than random noise. It's only after the fact when you compare results that it shows up. And needing a coincidence counter is unfortunately part of the delicate nature of these experiments. Also note again this is groups of photons... even though a single photon may be part of an interference pattern, you can't see that interference until you look at a group of them (it just shows up as a random dot until you build up enough of them).
My understanding of the idea behind the Zeilinger/Dopfer proposal is that by shifting the way they measure, they might be able to eliminate the need for a coincidence counter to be able to directly observe an interference pattern or not, indicating how it was being measured at the other end. Which opens up a possibility (albeit remote) for FTL communication.
Measuring at different times doesn't appear to matter (See Wheeler's Delayed Choice experiments). Which is very amazing in itself and an entirely different topic of discussion. The problem is that however you set up your experiment, no practical information is exchanged FTL. Alice could measure the entangled pair at the same interval as Bob, but that doesn't really tell her anything since Bob can't actually cause his entangled particle to have a particular spin, polarization, or whatever they're measuring. It's only interesting after the fact when they compare notes.
So you say well then, instead of using the particles let's use the act of measuring or not to transmit info. If Bob measures his particle he's sending a 0, if he doesn't he's sending a 1. And Alice will see this reflected at her end somehow. But the problem with this, from my understanding, is that everything is going to look random to Alice however she chooses to measure it (or however they agree to ahead of time). Because remember you are looking at individual particles. Again, it's only interesting after the fact when they compare notes.
Now the question I am not sure the answer to, is if they were to use a group of photons and either measuring or not measuring the group as a whole. For example, if you think of the classic double slit experiment, doing something to an entangled set of photons to cause their distant pairs to either form a wave-pattern or a blob on a detector. I don't know if this is possible or not, and it sounds like there might actually be some serious debate about this (see Dopfer experiment)
Of course someone who only browses the web with 4GB of ram isn't going to notice 350MB being used. But not everyone has 4GB of ram and not everyone only browses the web! The fact that you're on Slashdot means you very likely have an atypical computer that can handle a multitude of tasks easily.
But take a run of the mill Dell P4 with 1gb of RAM on WinXP, a typical business and home machine from a few years back, and very likely representative of a large portion of computers in the US. Heck, take most netbooks for that matter. For Joe User, that 350MB is a significant portion of his total RAM, which wouldn't be a bad thing, IF WINDOWS DIDN'T SWAP LIKE CRAZY once you get above some magical percentage. OK, so it's more of a rant on Windows than Firefox, but you gotta build for the way the computer world is, not how it should be.
While we're on the subject of locked down channels and Hulu, one thing they could certainly get away with charging a subscription for is a mobile version of Hulu. I'm hardly ever willing to pay a subscription fee for anything, but I would gladly pay it to watch Hulu on my phone. (I can already do this with YouTube for free but there's nothing I really want to watch on there)
Interestingly enough, very young children will typically generalize and call anything with 4 legs a "doggy" until they are corrected or shown the distinctions. That ability to generalize is one of the things that makes the human mind what it is. So yeah, it's amazing we can take an exemplar and be able to understand that other similar things of varied shapes sizes and colors are related but yet still understand species distinctions. My guess is that we're naturally very good at recognizing 3 dimensional features from many limited viewpoints
Agreed! Like the cheap drinking water straw thing... good for backpacking. The pixelqi screens for the OLPC... why are we still waiting on first world versions of these? I mean maybe in this case it's not worth it to have someone sitting there spinning samples all day, but I definitely see the potential market for these types of items
Would that really be such a bad thing (Apple winning the PC wars)? I would trade a less powerful CPU for a better UI and consistent hardware any day, assuming the price was similar. Those seem to be the two things that differentiates Apple from their competitors. However, I wonder if they had been dominant if there would have been such a push at Apple for a better "user experience" in the first place.
I have a DVD recorder too, but the problem for me is changing discs all the time. Don't get me wrong, there's a ton of advantages to DVDs. But if I go over 2 hours on a DVD the pixelation is too much to put up with. But a VCR recording in SLP is more watchable than my DVD recorder doing the same 4 or 6 hours. Sure the picture isn't as crisp, and you have wait while fast forwarding to get to the next show, but I find the pixellation in fast moving scenes far more annoying any of the VCR's disadvantages. Now practically this is all just a big rant, because what I find myself doing is just recording less rather than bothering with VHS anyway.
I really wish there were some cheaper options for DVD recorders with HDDs that were say $200 or less instead of $500. I mean when you get to the $500 range, sucking it up and paying for Tivo seems to make more sense.
The thing is, you've got remote substations, lines, generators, etc... that all have to communicate with your control system. Just because a network isn't on the internet, doesn't mean it's not vulnerable to attack, especially when those nodes may be hundreds of miles away.
The thing is, I'm not sure a glorified 3d scanner is going to help all that much. It would be cool for say digitizing the layout of your home or a model object, and being able to do so cheaply, but what I think would have a bigger impact is software intelligent enough to separate those objects out from the environment. Being able to recognize that say a flower or a person's arm is bendable, but a chair isn't. Or being able to recognize that the bottle of soda under a bright refrigerator light is the same bottle of soda that was just pulled out of a dark grocery bag. These are very difficult computer vision problems that are brains are well adapted to handle and we are only scratching the surface of being able to describe how that works.
That would be great. No fans, no platters and, no noise. Almost every computer hardware failure I've had was because of a cheap/faulty stock fan or a dead hard drive.
Plus in the Midwest there is an obvious lack of North/South lines. I can't actually go anywhere on Amtrak without going through Chicago! Plus there's only one a day which makes it very hard to make connections. On your other point, yes we pour so much money into highways and a pittance into alternative forms (trains, rail, buses, bike trails). And for some reason every road construction project, no matter how minor, seems to cost anywhere from tens to hundreds of millions of dollars.
I don't see the problem. Books have a spine that isn't bendable; all they have to do is put the electronics in a rigid part of the device and let the rest be flexible.
This is not an either/or choice, and to say it's due to lack of resources is disingenuous at best. There is more than enough food in the world to feed everyone. More than enough manufacturing capacity to vaccinate everyone. And in short order there could be more than enough hospitals and doctors to treat everyone who is sick. The reasons we can't vaccinate/feed/cure the world are not because we can't due to lack of resources, but because WE CHOOSE NOT TO as a society. (either directly or indirectly by supporting the particular political or economic systems of the world)
You know, usually I get really irritated tongue-in-cheek answers, but yours fits the article perfectly (of which reading was a big waste of time IMHO).
Here's the thing. Normal people don't want to spend hours and hours creating detailed 3D models in Blender or whatever. They just want the easiest way to turn their ideas into reality. Reducing the implementation time for a high quality end product, and eliminating the tedious tasks is a worthy goal. It's the same reason normal people don't program in assembly anymore. With the exception of some very specific programs, higher levels of abstraction are almost always better, and this is no exception.
Slashdot Mirror
About the only thing certain about those entanglement experiments is that there are no hidden local variables, so we know there is some sort of link between entangled particles that seems to work in spooky FTL ways. But no actual controllable information has been transferred FTL. Sure, quantum states of particles may have been, but we don't get to choose those without breaking the link, so it's useless as a communication medium. There's some ideas out there that MAY be able to exploit the statistical nature of the experiments to do it, but thus far we're stuck with c as an upper limit
Apple's biggest problem is that Jobs is always pushing an agenda, and as a result crippling an amazing device. Does it really take that much space to include a SD card slot, a USB jack, or a webcam? (even my cell phone has all those). Is it really going to hurt the user experience to allow Flash or my own applications? The answer of course is no to all these.
So to punish them you left a scone and a coffee that you already paid for? face palm, indeed.
That was really irritating to me. Before the switchover, all the digital channels were UHF and I could receive them fine with a nice compact antenna on every floor, which was great. After the switch, some shifted back to VHF and we're back to rabbit ear combos again, and the lower floors get bad signals. Will probably have to add an attic antenna but I'm dreading crawling around up there and fishing cable through the walls.
Seconded! I have seen this same nonsense with the ION and CW networks here, especially with audio and video that never quite sync up. It happens on the cable feed too, though it has gotten better lately (maybe enough people finally noticed and complained)
Where you can elevate highways, build tunnels underground, and/or stack roads to increase the number of lanes. Seattle, Boston, Omaha, San Francisco and San Antonio, among others have this figured out
In retrospect, I should have said measure or not measure in a particular way. So Bob is always measuring groups of photons, and Alice continually shifts the way she measures groups to send a message. You are correct that whoever measures thus ends the entanglement UNLESS they do it in a way that doesn't allow them to get any information. Take for example a variation on the quantum eraser experiment (I chose this one because it has a very intuitive diagram and IMO is a fascinating experiment):
http://en.wikipedia.org/wiki/Delayed_choice_quantum_eraser
A person can choose whether to measure the particles in a way that preserves the path information, or one that doesn't. This is where the spooky effect comes in, because if you measure in a way that preserves the which-way path information, the interference disappears, but if you make it such that it's impossible to tell, interference takes place. In that particular case though, without the coincidence counter you can't see anything other than random noise. It's only after the fact when you compare results that it shows up. And needing a coincidence counter is unfortunately part of the delicate nature of these experiments. Also note again this is groups of photons... even though a single photon may be part of an interference pattern, you can't see that interference until you look at a group of them (it just shows up as a random dot until you build up enough of them).
My understanding of the idea behind the Zeilinger/Dopfer proposal is that by shifting the way they measure, they might be able to eliminate the need for a coincidence counter to be able to directly observe an interference pattern or not, indicating how it was being measured at the other end. Which opens up a possibility (albeit remote) for FTL communication.
Actually I should clarify in the last paragraph I meant doing something to the way the entangled set of photons is measured.
Measuring at different times doesn't appear to matter (See Wheeler's Delayed Choice experiments). Which is very amazing in itself and an entirely different topic of discussion. The problem is that however you set up your experiment, no practical information is exchanged FTL. Alice could measure the entangled pair at the same interval as Bob, but that doesn't really tell her anything since Bob can't actually cause his entangled particle to have a particular spin, polarization, or whatever they're measuring. It's only interesting after the fact when they compare notes.
So you say well then, instead of using the particles let's use the act of measuring or not to transmit info. If Bob measures his particle he's sending a 0, if he doesn't he's sending a 1. And Alice will see this reflected at her end somehow. But the problem with this, from my understanding, is that everything is going to look random to Alice however she chooses to measure it (or however they agree to ahead of time). Because remember you are looking at individual particles. Again, it's only interesting after the fact when they compare notes.
Now the question I am not sure the answer to, is if they were to use a group of photons and either measuring or not measuring the group as a whole. For example, if you think of the classic double slit experiment, doing something to an entangled set of photons to cause their distant pairs to either form a wave-pattern or a blob on a detector. I don't know if this is possible or not, and it sounds like there might actually be some serious debate about this (see Dopfer experiment)
Of course someone who only browses the web with 4GB of ram isn't going to notice 350MB being used. But not everyone has 4GB of ram and not everyone only browses the web! The fact that you're on Slashdot means you very likely have an atypical computer that can handle a multitude of tasks easily.
But take a run of the mill Dell P4 with 1gb of RAM on WinXP, a typical business and home machine from a few years back, and very likely representative of a large portion of computers in the US. Heck, take most netbooks for that matter. For Joe User, that 350MB is a significant portion of his total RAM, which wouldn't be a bad thing, IF WINDOWS DIDN'T SWAP LIKE CRAZY once you get above some magical percentage. OK, so it's more of a rant on Windows than Firefox, but you gotta build for the way the computer world is, not how it should be.
While we're on the subject of locked down channels and Hulu, one thing they could certainly get away with charging a subscription for is a mobile version of Hulu. I'm hardly ever willing to pay a subscription fee for anything, but I would gladly pay it to watch Hulu on my phone. (I can already do this with YouTube for free but there's nothing I really want to watch on there)
Interestingly enough, very young children will typically generalize and call anything with 4 legs a "doggy" until they are corrected or shown the distinctions. That ability to generalize is one of the things that makes the human mind what it is. So yeah, it's amazing we can take an exemplar and be able to understand that other similar things of varied shapes sizes and colors are related but yet still understand species distinctions. My guess is that we're naturally very good at recognizing 3 dimensional features from many limited viewpoints
Agreed! Like the cheap drinking water straw thing... good for backpacking. The pixelqi screens for the OLPC... why are we still waiting on first world versions of these? I mean maybe in this case it's not worth it to have someone sitting there spinning samples all day, but I definitely see the potential market for these types of items
Would that really be such a bad thing (Apple winning the PC wars)? I would trade a less powerful CPU for a better UI and consistent hardware any day, assuming the price was similar. Those seem to be the two things that differentiates Apple from their competitors. However, I wonder if they had been dominant if there would have been such a push at Apple for a better "user experience" in the first place.
I have a DVD recorder too, but the problem for me is changing discs all the time. Don't get me wrong, there's a ton of advantages to DVDs. But if I go over 2 hours on a DVD the pixelation is too much to put up with. But a VCR recording in SLP is more watchable than my DVD recorder doing the same 4 or 6 hours. Sure the picture isn't as crisp, and you have wait while fast forwarding to get to the next show, but I find the pixellation in fast moving scenes far more annoying any of the VCR's disadvantages. Now practically this is all just a big rant, because what I find myself doing is just recording less rather than bothering with VHS anyway.
I really wish there were some cheaper options for DVD recorders with HDDs that were say $200 or less instead of $500. I mean when you get to the $500 range, sucking it up and paying for Tivo seems to make more sense.
The thing is, you've got remote substations, lines, generators, etc... that all have to communicate with your control system. Just because a network isn't on the internet, doesn't mean it's not vulnerable to attack, especially when those nodes may be hundreds of miles away.
Guacamole and sour cream are never unnecessary when it comes to quesadillas!
The thing is, I'm not sure a glorified 3d scanner is going to help all that much. It would be cool for say digitizing the layout of your home or a model object, and being able to do so cheaply, but what I think would have a bigger impact is software intelligent enough to separate those objects out from the environment. Being able to recognize that say a flower or a person's arm is bendable, but a chair isn't. Or being able to recognize that the bottle of soda under a bright refrigerator light is the same bottle of soda that was just pulled out of a dark grocery bag. These are very difficult computer vision problems that are brains are well adapted to handle and we are only scratching the surface of being able to describe how that works.
That would be great. No fans, no platters and, no noise. Almost every computer hardware failure I've had was because of a cheap/faulty stock fan or a dead hard drive.
Plus in the Midwest there is an obvious lack of North/South lines. I can't actually go anywhere on Amtrak without going through Chicago! Plus there's only one a day which makes it very hard to make connections. On your other point, yes we pour so much money into highways and a pittance into alternative forms (trains, rail, buses, bike trails). And for some reason every road construction project, no matter how minor, seems to cost anywhere from tens to hundreds of millions of dollars.
I don't see the problem. Books have a spine that isn't bendable; all they have to do is put the electronics in a rigid part of the device and let the rest be flexible.
This is not an either/or choice, and to say it's due to lack of resources is disingenuous at best. There is more than enough food in the world to feed everyone. More than enough manufacturing capacity to vaccinate everyone. And in short order there could be more than enough hospitals and doctors to treat everyone who is sick. The reasons we can't vaccinate/feed/cure the world are not because we can't due to lack of resources, but because WE CHOOSE NOT TO as a society. (either directly or indirectly by supporting the particular political or economic systems of the world)
You know, usually I get really irritated tongue-in-cheek answers, but yours fits the article perfectly (of which reading was a big waste of time IMHO).
Here's the thing. Normal people don't want to spend hours and hours creating detailed 3D models in Blender or whatever. They just want the easiest way to turn their ideas into reality. Reducing the implementation time for a high quality end product, and eliminating the tedious tasks is a worthy goal. It's the same reason normal people don't program in assembly anymore. With the exception of some very specific programs, higher levels of abstraction are almost always better, and this is no exception.
dude, you totally missed the point. Even though he said HDD cache he's clearly talking about the performance hit from swapping.