"Please describe how 'time-compressing' a waveform is different than frequency-shifting it"
If I frequency shift a waveform by a factor of 2, then the time compression is also a factor of 2. The article doesn't really mention it, but the frequency shifts in this experiment are much less than a factor of 2, but the time compression is from 2.5 ns to 95 ps, a factor of 27 compression.
This is a real time lens. A spatial lens works by imparting a quadratic spatial phase to light. Diffraction then causes the beam to focus due to the quadratic spatial phase.
A time lens works in analogy to a spatial lens by imparting a quadratic temporal phase to a light pulse. Propagation in a dispersive media then leads to the time compression.
The difficulty is it is very hard to impart a quadratic phase to short light pulses. The only real way to do it is nonlinear optics, which is where the (small) frequency shifts mentioned in the article come from.
To my knowladge, "terroristic" isn't even a real word, except in the sense that even engrish words that come into common usage do get promoted to the OED or somesuch publication.
It probably would have taken you less time to find this page than it did to write your post.
I especially like how the article claims the Zune scene editor just happened to conveniently bump into a MS Zune employee on a business trip and then proceeded to pump him for information...
Yeah, right. And then monkeys flew out of his butt.
I think the bigger problem is price. At least for myself, I want to treat a download as a rental - get the movie quickly, watch it once and forget about it. However, according to the article, in order to keep the studios happy they have to charge a similar price to what the movie costs in stores (almost $15 for Superman Returns, for example). So you pay way more than a rental, but you don't get the cool packaging and liner notes that you would get if you bought it in a store. What is the advantage here?
Re:Exit Polls are Inaccurate
on
Who won?
·
· Score: 1
Hmmm, and how do you know that the people who choose not to participate are republican?
Three replies to the grandparent, all with the same clever GOTCHA!
Compare the demographics of the exit polls to the demographics of the registered voters. Not so hard.
Your product is only covered by the patent if it fits all the claims of the patent.
Except that, in the grandparent post, I wasn't concerned about whether a product would violate the patent. My point is that before the situation even gets to that point, the patent is going to have difficulty issuing in the first place since 1) the patent authors have written a very broad claim, and 2) a lot of people have been working on DRM for a long time. While I know next to nothing about the specifics of DRM, to my untrained eye it seems easy to find prior art that would invalidate claim one of the patent.
What is claimed is
1. A method of controlling use of a computer program, said method comprising the steps of: monitoring usage of said computer program for at least one instance of a rights violation event; saving, upon detection of said rights violation event, state information pertaining to said computer program; and suspending, upon saving said state information, operation of said computer program.
This is an awfully broad claim. I would think proving prior art here and invalidating the claim would be pretty easy.
Fair enough, but 90% of the Dells, Gateways, and HPs currently preloaded with Vista still doesn't constitute 90% of the current machines out there in operation.
Nope. It's a response to the article you linked to. The article you linked to was also linked to by the submitter. Things have gotten REALLY bad when people can't even be bothered to read the first sentence of the summary.
Because the analog signal doesn't actually leave the computer, but is simply looped back in the sound card, sound quality of the re-recording is excellent.
Actually the quality of the conversion has little to do with the fact that the signal does not leave the computer and everything to do with the quality of the A/D and D/A converters in the sound card. Given the consumer grade sound cards in many computers I am skeptical of the claims of quality.
The peak in production around 1975 is well understood. It is called Hubbert's Peak after the geologist who correctly forcast that US oil production would peak sometime in the 1970's.
He also predicted a peak in world oil production in the 1990's. It has been delayed a little due to a drop in oil consumption in the 1980's. However, the point is that even the 70's people who really understood the problem thought oil production would recover after the 1975 peak, but the situation today is very different.
Slashdot Mirror
"Please describe how 'time-compressing' a waveform is different than frequency-shifting it"
If I frequency shift a waveform by a factor of 2, then the time compression is also a factor of 2. The article doesn't really mention it, but the frequency shifts in this experiment are much less than a factor of 2, but the time compression is from 2.5 ns to 95 ps, a factor of 27 compression.
This is a real time lens. A spatial lens works by imparting a quadratic spatial phase to light. Diffraction then causes the beam to focus due to the quadratic spatial phase.
A time lens works in analogy to a spatial lens by imparting a quadratic temporal phase to a light pulse. Propagation in a dispersive media then leads to the time compression.
The difficulty is it is very hard to impart a quadratic phase to short light pulses. The only real way to do it is nonlinear optics, which is where the (small) frequency shifts mentioned in the article come from.
It's not sad, it's GREAT news. After all there is a serious dearth of 3d shooters out on the market!
How about that, the word for 'sale' is the same in English and Australian!
More than half of Slashdot readership is only interested in the articles those editors you hate so much.
Cannot parse. Where's one of those editors when you need one?
Sure. Mozart had an impact. Then he died when he was thirty five. We'll never know if he was really any good ...
Mozart created a body of music that has survived over 200 years after his death. And you still won't say whether he is any good?
DAMN your tough!!!
To my knowladge, "terroristic" isn't even a real word, except in the sense that even engrish words that come into common usage do get promoted to the OED or somesuch publication.
It probably would have taken you less time to find this page than it did to write your post.
Terroristic is the adjective form of terrorist.
so even when they get technology wrong
You mean like when they use the word "iTunes" when they really mean "songs"?
way to notice. Blatant astroturfing.
I especially like how the article claims the Zune scene editor just happened to conveniently bump into a MS Zune employee on a business trip and then proceeded to pump him for information...
Yeah, right. And then monkeys flew out of his butt.
In response to overwhelming user demand for Linux
I do not think that word means what you think it means.
Don't build a PC, re-use old hardware and keep it out of landfills.
And then turn it off when it is not in use.
If by "Quantum encryption" you mean "Quantum key distribution" then you are incorrect. It is available commercially now.
I think the bigger problem is price. At least for myself, I want to treat a download as a rental - get the movie quickly, watch it once and forget about it. However, according to the article, in order to keep the studios happy they have to charge a similar price to what the movie costs in stores (almost $15 for Superman Returns, for example). So you pay way more than a rental, but you don't get the cool packaging and liner notes that you would get if you bought it in a store. What is the advantage here?
Hmmm, and how do you know that the people who choose not to participate are republican?
Three replies to the grandparent, all with the same clever GOTCHA!
Compare the demographics of the exit polls to the demographics of the registered voters. Not so hard.
What a twist!
Not really. Mostly it just emphasizes how few new ideas Hollywood really has.
Movies based on a TV show based on a movie. What'll they think of next?
Video games based on movies based on a TV show based on a movie.
who doesn't want to get rid of dark energy/matter and hyperinflation
The people who are making measurements of dark matter, that is who.
Your product is only covered by the patent if it fits all the claims of the patent.
Except that, in the grandparent post, I wasn't concerned about whether a product would violate the patent. My point is that before the situation even gets to that point, the patent is going to have difficulty issuing in the first place since 1) the patent authors have written a very broad claim, and 2) a lot of people have been working on DRM for a long time. While I know next to nothing about the specifics of DRM, to my untrained eye it seems easy to find prior art that would invalidate claim one of the patent.
From the disclosure:
What is claimed is
1. A method of controlling use of a computer program, said method comprising the steps of: monitoring usage of said computer program for at least one instance of a rights violation event; saving, upon detection of said rights violation event, state information pertaining to said computer program; and suspending, upon saving said state information, operation of said computer program.
This is an awfully broad claim. I would think proving prior art here and invalidating the claim would be pretty easy.
Fair enough, but 90% of the Dells, Gateways, and HPs currently preloaded with Vista still doesn't constitute 90% of the current machines out there in operation.
Those of us who have been using email for two or three decades.
Whippersnapper.
Nope. It's a response to the article you linked to. The article you linked to was also linked to by the submitter. Things have gotten REALLY bad when people can't even be bothered to read the first sentence of the summary.
A rising tide lifts all boats.
Mr Reagan, is that you?
Because the analog signal doesn't actually leave the computer, but is simply looped back in the sound card, sound quality of the re-recording is excellent.
Actually the quality of the conversion has little to do with the fact that the signal does not leave the computer and everything to do with the quality of the A/D and D/A converters in the sound card. Given the consumer grade sound cards in many computers I am skeptical of the claims of quality.
The peak in production around 1975 is well understood. It is called Hubbert's Peak after the geologist who correctly forcast that US oil production would peak sometime in the 1970's.
He also predicted a peak in world oil production in the 1990's. It has been delayed a little due to a drop in oil consumption in the 1980's. However, the point is that even the 70's people who really understood the problem thought oil production would recover after the 1975 peak, but the situation today is very different.
I recall a blow I once delt to Sony's recovery as well.