Maybe you should figure out what LATENCY is before posting about it. Latency would have nothing to do with the GP's music cutting out, lack of bandwidth somewhere along the way would!
-Tom
P.S. 8 MB/s over internet2 is nothing to brag about. Hell, it's not even something to really brag about on the plain old internet.
As far as I can tell, the advantage in this approach is the fact that you are using light, which can relatively easily be redirected. This would allow you to overcome the mechanical limitations on rotational speed.
Right now you have to move the writing surface under the head mechanically. In the future, you'll be able to deflect the beam to the proper location on the drive in one or both axes.
Why not give individuals, not just corporations, more incentive to study the hard sciences? Incentives and opportunity already exist, especially in the form of money.
I pulled in scholarships like nobody's business in college (physics and comp sci major).
As a grad student, tuition is waved, and I get paid a stipend to get my PhD in a field where employers are literally fighting for the opportunity to give me a six figure starting salary... (The tuition waver and stipend part are true of almost every graduate program in science/engineering in the US).
As another poster said, our Universities are world class. Our lower education is third world. We are wasting the formative years of our population, and not enough world class people are getting to our world class universities! If we want to remain competitive we need a major attitude and emphasis change. The four largest problems in my opinion.
1) Image : Science and smart == geeky and uncool. My parents both came from a poor communist country. They never failed to emphasize that education and/or hard work is the ONLY way to get ahead. Unfortunately, this was never true for most of my American friends. The new American Dream is no longer one of a land of boundless opportunity for those willing to work for it, but one of quick/easy fortune and fame. Science is the antithesis to this new dream.
2) Educator training : Most of the people teaching our children pre-college come from a certain segment of the "educated" population. The segment that struggled with math and science.
3) The belief that everyone has infinite potential : Not everyone gets to be an astronaut. In order to remain competitive, we have to leave kids behind in a more intelligent fashion. Right now we just pretend it doesn't happen and that nobody is left behind. We lower all standards to accommodate the lowest common denominator. In a more ideal system, we identify the pathological problem cases and instead of failing them upwards, we should weed them out of the general education pool, and give them a way to earn a decent living (trade schools?). This would not only raise the lowest common denominator in our general education pool, but also produce more healthy and productive members of society.
4) Decision Makers : In my experience, the smartest people that I know want absolutely nothing to do with politics, public policy, or decision making.
REPEAT AFTER ME : You can NOT use this (or any similar scheme) to send messages back in time! Even if information between entangled particles travels faster than the speed of light upon measurement of a member of the pair, you CAN NOT exploit that effect to send any information from point A to point B. Anyone that has taken even a basic quantum class can tell you this! I bet that the actual researcher knows this, and is after the answer to a much more subtle question regarding the nature of the universe, and that his work is being sensationalized. (in fact, I should probably check and see whether he is downstairs... there's a huge conference on quantum optics going on right now)
Don't believe me? Sit down one day and try to design an actual device to send information from point A to point B using entangled particles. Use all of the polarizers, NLO crystals, and stern-gerlach magnets, etc. etc. that you want, but remember that you can only measure an entangled pair ONCE before you collapse the wave function. It is NOT possible.
[quote]But how do they put in those resistors? With switches. Switches that inject charge onto the output wire when their state changes. Switches with their own resistance and temperature coefficient of resistance. And that is detectable.[/quote]
That has nothing to do with it. I suggest you go and read up a little bit on how this actually works before commenting further. In a simple man in the middle attack, detecting change in resistance or the operation of a switch (in any other way) is inconsequential as all it tells you is that the state has changed (randomly, btw). This still gets you no closer to knowing what the actual bit was set to. You HAVE to be at one of the endpoints, manipulating one of the resistors to know the state.
[quote] Alas, real resistors cannot be perfectly matched; the real wire state table has 16 rows. I estimate that if you pull out all the stops, you might be able to match them to one part in 10e-7 (0.1 parts per million), which is not sufficient for security work. [/quote]
The resistors do not have to be "perfectly" matched. Where did you get your statement that 1e-7 is not good enough for security work? Is it just a gut feeling, or did you actually run a calculation?
P.S. to myself... The only way this would work is if EVE : 1) Got to the wire first 2) Cut the wire severing the connection between Alice and Bob 3) had 6 resistors, two to make up for the missing length of wire, and 4 to use in the scheme. 4) Even would pretend to be Alice on one end, and Bob on the other, relaying the messages in between while saving a copy for herself.
You are incorrect... If Eve gets to the wire first, then Alice and Bob may not know that there is a tap, but the tap is still worthless. Only the party at an enpoint would know what resistor THEY have put in, allowing them to deduce the resistor used at the other end. The person in the middle would only have the (worthless) piece of information that Alice and Bob differed in the resistor that they chose.
Noise endpoint 1 endpoint 2
High high high Medium high low Medium low high Low low low
You throw out the high/low noise cases. In order to know what the other person is doing in the medium case you need to know what resistor YOU put in!
-Tom
P.S. one of my professors proposed this method during a casual conversation a few years back. It's and idea that has been kicked around for a while, and in my opinion is very solid.
P.P.S. there is no directionality to the signal here.
Double billed is a misnomer. It's ALWAYS billed once, the difference is only in who pays that bill.
USA : Cell owner pays for all calls (incoming/outgoing) Many other places : Person placing call always pays (dialing a cell number results in larger charge).
I personally prefer the US billing system. It allows our cell numbers to fall into familiar local geographic area codes (and allows for abbreviated dialing in many regions). With the prevalence of included plan minutes, offpeak calling, free long distance, and free local calling (for landlines), it is usually much cheaper than a caller-pays system would be!!!
Until recently, I felt the same way... WTF is up with Ubuntu, and why is everyone suddenly going gaga over it.
Then I tried it, and I must say that it was hands down the best distro that I have ever tried (and I've used all of the other major ones out there). It was clean, consistent, downright pleasant, and everything just worked right out of the box.
If you want linux on the desktop, you need a distro that my Mom can feel comfortable using. IMHO, Ubuntu is by far the closest we have ever been.
The Tomshardware test is for a desktop system. The graphics subsystem on laptops will usually throttle down to conserve power when not in use. (The ATI version of this was called PowerNow on my old Inspiron 4150.) I suspect that the higher graphics load under Aero would prevent the card from throttling as much as it would in XP.
Anecdotally many things are true... I have a friend who has so far replaced his brand new C2DUO Macbook battery TWICE (under warranty) because it just decided to stop holding a charge one day!
I have a HEAVILY used 5+ year old dell inspiron laptop that still manages to get > 3 hours on the original batteries. (original life was close to 6 hours). Color me impressed, but the point being that individual experiences are usually worthless for determining things like reliability.
[quote] FFS. No-one needs to be 're-trained' to use an Office suite, whether it's Word 2007, Openoffice, or any other. It's an office suite! You click on the page-like thing and type words. All the major, often-used icons look exactly the same (or at least have the same basic shape and are recognisable) in every office suite I can think of. [/quote]
You obviously haven't interacted with anyone whose sum knowledge of Microsoft Office products is kept haphazardly on a series of post-its applied to their monitor. Unfortunately, in my experience, this demographic is alarmingly large, and alarmingly expensive in terms of productivity and dollars when it comes time to retrain. I have ALWAYS run the latest microsoft OS/Office suite on my PC, but everything that has come out of Redmond in the past two years is complete garbage. I gave both Vista and Office 2007 a fair shot for a week, and decided to take a pass on this generation of products.
So let me get this straight. I go through the checkout line, I swipe my card, sign the authorization slip, and then whip out my internet connected PDA / cell phone / laptop to authorize the transaction before the merchant gets their payment confirmation and I can walk out of the store.
Brilliant... except for all of the obvious flaws...
Citibank can already send me daily alerts on my current account balance. Anything more is superfluous as my liability is only limited to $50 of unauthorized purchases made on my credit card. Chances are that limit will be reached the FIRST time some miscreant uses my card.
I think the current system works very well. But if you want a simple, quick, low-tech method for accomplishing much more for much less... REQUIRE a picture on every single credit card (POS transactions), and be strict about the requirement on merchants to ship ONLY to addresses on file (online/telephone transactions).
Your scheme is brilliant because : - Credit card companies have an infinite supply of employees and money to authorize me every time I need to use my card to buy a 99 cent pack of gum without subjecting me to a 20 minute wait time. - I have an infinite supply of time to wait for said authorization.
In the past few months I have actually found that several retailers have RELAXED their signature requirements on credit card purchases. Many stores now no longer require a signature below a certain amount. (IIRC My local home depot is now $50). Incidentally, I am liable for the first $50 in unauthorized purchases... hmmm...
Those only apply to the govt - Comcast doesn't have to provide service to you at all (unless there is another regulation that requires them to, such as some of the "common carrier" stuff). Same thing with things like "freedom of speech" - it is *not* a violation of it for clear channel to self censor any group for whatever reason they want, it puts limits on the govt, not people or businesses. Snip... In my opinion that only held true until a buttload of my tax dollars went to subsidizing their local cable monopolies and telecom buildouts. In most markets in the US, there are exactly zero, one, or two high speed internet service providers, and all others are effectively precluded from competing for my dollar. The internet is becoming an increasingly important part of modern life, and is essential to many jobs (including mine). In lieu of the fact that this is not truly a free market, and that OUR PUBLIC money was used to secure their private business model, I believe that it is the mandate of the government to either :
1) Allow the monopoly, but ensure that they HAVE to provide service to everyone capable of paying for it at a reasonable rate. Audit their profits to ensure that they aren't fleecing the public.
2) Take away their monopolies. Force cable companies and telcos to fully open up access to their lines to competitors akin to telephone service. (e.g. so that I could use comcast's cable lines to get Google Internet service, and comcast gets only a small cut to cover the actual cable maintenance fees). Currently, if you want something like Earthlink cable/dsl internet, or AOL highspeed, the costs exceed that of the local cable/tel company because the base IP service is still provided by them. This is NOT competition.
Slashdot Mirror
Maybe you should figure out what LATENCY is before posting about it. Latency would have nothing to do with the GP's music cutting out, lack of bandwidth somewhere along the way would!
-Tom
P.S. 8 MB/s over internet2 is nothing to brag about. Hell, it's not even something to really brag about on the plain old internet.
Yeah, but the Valet key has to perform one function by definition... allow you to open and drive the car.
If someone copies the valet key, regardless of whether it is mechanical or electronic, they can now steal your car.
Nope, not bad at all... I pay $50/month for 10meg/384k from Time Warner. (it used to be the same price for 3meg/384k as little as 2 years back)
The 384k is really what gets me...
Photons do not have (rest) mass... there's your problem!
No it wasn't... (look up group vs phase velocity)
That is WAY too much for an XML feed, and rivals the cost of DVR service from my cable co.
We've scraped screens before.
As far as I can tell, the advantage in this approach is the fact that you are using light, which can relatively easily be redirected. This would allow you to overcome the mechanical limitations on rotational speed.
Right now you have to move the writing surface under the head mechanically. In the future, you'll be able to deflect the beam to the proper location on the drive in one or both axes.
I pulled in scholarships like nobody's business in college (physics and comp sci major).
As a grad student, tuition is waved, and I get paid a stipend to get my PhD in a field where employers are literally fighting for the opportunity to give me a six figure starting salary... (The tuition waver and stipend part are true of almost every graduate program in science/engineering in the US).
As another poster said, our Universities are world class. Our lower education is third world. We are wasting the formative years of our population, and not enough world class people are getting to our world class universities! If we want to remain competitive we need a major attitude and emphasis change. The four largest problems in my opinion.
1) Image : Science and smart == geeky and uncool. My parents both came from a poor communist country. They never failed to emphasize that education and/or hard work is the ONLY way to get ahead. Unfortunately, this was never true for most of my American friends. The new American Dream is no longer one of a land of boundless opportunity for those willing to work for it, but one of quick/easy fortune and fame. Science is the antithesis to this new dream.
2) Educator training : Most of the people teaching our children pre-college come from a certain segment of the "educated" population. The segment that struggled with math and science.
3) The belief that everyone has infinite potential : Not everyone gets to be an astronaut. In order to remain competitive, we have to leave kids behind in a more intelligent fashion. Right now we just pretend it doesn't happen and that nobody is left behind. We lower all standards to accommodate the lowest common denominator. In a more ideal system, we identify the pathological problem cases and instead of failing them upwards, we should weed them out of the general education pool, and give them a way to earn a decent living (trade schools?). This would not only raise the lowest common denominator in our general education pool, but also produce more healthy and productive members of society.
4) Decision Makers : In my experience, the smartest people that I know want absolutely nothing to do with politics, public policy, or decision making.
IAAP
REPEAT AFTER ME : You can NOT use this (or any similar scheme) to send messages back in time! Even if information between entangled particles travels faster than the speed of light upon measurement of a member of the pair, you CAN NOT exploit that effect to send any information from point A to point B. Anyone that has taken even a basic quantum class can tell you this! I bet that the actual researcher knows this, and is after the answer to a much more subtle question regarding the nature of the universe, and that his work is being sensationalized. (in fact, I should probably check and see whether he is downstairs... there's a huge conference on quantum optics going on right now)
Don't believe me? Sit down one day and try to design an actual device to send information from point A to point B using entangled particles. Use all of the polarizers, NLO crystals, and stern-gerlach magnets, etc. etc. that you want, but remember that you can only measure an entangled pair ONCE before you collapse the wave function. It is NOT possible.
The dark ages called... They want their AC back.
[quote]But how do they put in those resistors? With switches. Switches that inject charge onto the output wire when their state changes. Switches with their own resistance and temperature coefficient of resistance. And that is detectable.[/quote]
That has nothing to do with it. I suggest you go and read up a little bit on how this actually works before commenting further. In a simple man in the middle attack, detecting change in resistance or the operation of a switch (in any other way) is inconsequential as all it tells you is that the state has changed (randomly, btw). This still gets you no closer to knowing what the actual bit was set to. You HAVE to be at one of the endpoints, manipulating one of the resistors to know the state.
[quote] Alas, real resistors cannot be perfectly matched; the real wire state table has 16 rows. I estimate that if you pull out all the stops, you might be able to match them to one part in 10e-7 (0.1 parts per million), which is not sufficient for security work. [/quote]
The resistors do not have to be "perfectly" matched. Where did you get your statement that 1e-7 is not good enough for security work? Is it just a gut feeling, or did you actually run a calculation?
P.S. to myself... The only way this would work is if EVE :
1) Got to the wire first
2) Cut the wire severing the connection between Alice and Bob
3) had 6 resistors, two to make up for the missing length of wire, and 4 to use in the scheme.
4) Even would pretend to be Alice on one end, and Bob on the other, relaying the messages in between while saving a copy for herself.
You are incorrect... If Eve gets to the wire first, then Alice and Bob may not know that there is a tap, but the tap is still worthless. Only the party at an enpoint would know what resistor THEY have put in, allowing them to deduce the resistor used at the other end. The person in the middle would only have the (worthless) piece of information that Alice and Bob differed in the resistor that they chose.
Noise endpoint 1 endpoint 2
High high high
Medium high low
Medium low high
Low low low
You throw out the high/low noise cases. In order to know what the other person is doing in the medium case you need to know what resistor YOU put in!
-Tom
P.S. one of my professors proposed this method during a casual conversation a few years back. It's and idea that has been kicked around for a while, and in my opinion is very solid.
P.P.S. there is no directionality to the signal here.
I think I just had a small seizure.
Hahaha... the fact that someone remembers that is insane! I remember getting burned on the E740 WM2003 update thing as well!
Double billed is a misnomer. It's ALWAYS billed once, the difference is only in who pays that bill.
USA : Cell owner pays for all calls (incoming/outgoing)
Many other places : Person placing call always pays (dialing a cell number results in larger charge).
I personally prefer the US billing system. It allows our cell numbers to fall into familiar local geographic area codes (and allows for abbreviated dialing in many regions). With the prevalence of included plan minutes, offpeak calling, free long distance, and free local calling (for landlines), it is usually much cheaper than a caller-pays system would be!!!
Until recently, I felt the same way... WTF is up with Ubuntu, and why is everyone suddenly going gaga over it.
Then I tried it, and I must say that it was hands down the best distro that I have ever tried (and I've used all of the other major ones out there). It was clean, consistent, downright pleasant, and everything just worked right out of the box.
If you want linux on the desktop, you need a distro that my Mom can feel comfortable using. IMHO, Ubuntu is by far the closest we have ever been.
The Tomshardware test is for a desktop system. The graphics subsystem on laptops will usually throttle down to conserve power when not in use. (The ATI version of this was called PowerNow on my old Inspiron 4150.) I suspect that the higher graphics load under Aero would prevent the card from throttling as much as it would in XP.
Anecdotally many things are true... I have a friend who has so far replaced his brand new C2DUO Macbook battery TWICE (under warranty) because it just decided to stop holding a charge one day!
I have a HEAVILY used 5+ year old dell inspiron laptop that still manages to get > 3 hours on the original batteries. (original life was close to 6 hours). Color me impressed, but the point being that individual experiences are usually worthless for determining things like reliability.
You kidding me??? Satellite TV is so widely cracked there's an entire industry that has evolved around it!!
[quote] FFS. No-one needs to be 're-trained' to use an Office suite, whether it's Word 2007, Openoffice, or any other. It's an office suite! You click on the page-like thing and type words. All the major, often-used icons look exactly the same (or at least have the same basic shape and are recognisable) in every office suite I can think of. [/quote]
You obviously haven't interacted with anyone whose sum knowledge of Microsoft Office products is kept haphazardly on a series of post-its applied to their monitor. Unfortunately, in my experience, this demographic is alarmingly large, and alarmingly expensive in terms of productivity and dollars when it comes time to retrain. I have ALWAYS run the latest microsoft OS/Office suite on my PC, but everything that has come out of Redmond in the past two years is complete garbage. I gave both Vista and Office 2007 a fair shot for a week, and decided to take a pass on this generation of products.
So let me get this straight. I go through the checkout line, I swipe my card, sign the authorization slip, and then whip out my internet connected PDA / cell phone / laptop to authorize the transaction before the merchant gets their payment confirmation and I can walk out of the store.
Brilliant... except for all of the obvious flaws...
Citibank can already send me daily alerts on my current account balance. Anything more is superfluous as my liability is only limited to $50 of unauthorized purchases made on my credit card. Chances are that limit will be reached the FIRST time some miscreant uses my card.
I think the current system works very well. But if you want a simple, quick, low-tech method for accomplishing much more for much less... REQUIRE a picture on every single credit card (POS transactions), and be strict about the requirement on merchants to ship ONLY to addresses on file (online/telephone transactions).
Your scheme is brilliant because :
- Credit card companies have an infinite supply of employees and money to authorize me every time I need to use my card to buy a 99 cent pack of gum without subjecting me to a 20 minute wait time.
- I have an infinite supply of time to wait for said authorization.
In the past few months I have actually found that several retailers have RELAXED their signature requirements on credit card purchases. Many stores now no longer require a signature below a certain amount. (IIRC My local home depot is now $50). Incidentally, I am liable for the first $50 in unauthorized purchases... hmmm...
Whatever... wake me up when chimps have a joint strike fighter...
1) Allow the monopoly, but ensure that they HAVE to provide service to everyone capable of paying for it at a reasonable rate. Audit their profits to ensure that they aren't fleecing the public.
2) Take away their monopolies. Force cable companies and telcos to fully open up access to their lines to competitors akin to telephone service. (e.g. so that I could use comcast's cable lines to get Google Internet service, and comcast gets only a small cut to cover the actual cable maintenance fees). Currently, if you want something like Earthlink cable/dsl internet, or AOL highspeed, the costs exceed that of the local cable/tel company because the base IP service is still provided by them. This is NOT competition.