RMS doesn't use a commandline either. He uses the EMACS mini-buffer.
Getting Keys from Black Boxes
on
CPRM Lecture
·
· Score: 2
In the summary, QuantumG makes the arguement that if keys are hard to get from legit devices, they will necessarily be hard to get from blak boxes too. This isn't necessairily true. If you are a cracker, you will need to peel back the insulation on the chip and understand the lithography of the chip (hard), or use a brute force, exhaustive search of the entire keyspace in software (not technically hard, but takes billions of years). However if you are CPRM, you have a list of all the valid keys sitting on your desk, so rather than an exhaustive search of the entire keyspace to find out what key a black box is using, you only need to test the keys on your list. This is trivial, and as such makes it very easy to deactivate a comprimised key, even though getting keys out of legit devices is still hard.
I've had 4 digital cameras over the years, as well as several SLR film cameras. Two of my DCs have been Kodaks and the other two Epsons. The one I use now is an Epson PhotoPC 850Z. Its a nice camera, with a lot of bells and whistles, some of which are really usefull, and some of which look good on the box. In comparison to my other three cameras, I would have to say that one of the most important features is an optical zoom. Don't settle for just a digital zoom. You will be disapointed with the results. I got so frustrated with the digital zoom on my old Epson (PhotoPC 600) that I just had to quit using it all together. It only works in lo res mode, and the shots look terrible. With my new 850Z, though, you can shoot 1600x1200, and still get up close and personal.
The 850Z also has adjustable f-stop and shutter speed settings. I use these features quite often, but only because I have many years of experience with adjusting those settings with an SLR camera. If you aren't an experieced photographer, and you fool with those settings, you will probably make your shots look worse than if you had simply used a fully automatic camera.
Here are some images I took with the 850Z of a trip to Belgium
I'm a junior at MIT in physics and computer science. This place is pretty hardcore UNIX and I don't think that is going to change overnight. We've spent the past 15 years developing our network operating environment (called Athena) and just because Bill wants to show a little cuff, we're not about to throw it out and start all over.
The deal is not as sinister as it sounds. The motivation is that MIT needs money to run its operations (which are quite costly) and MS wants to recruit. This really isn't about OS dominance.
I just spoke with Hal Abelson (CS professor who invented scheme and other things) and it appears that the MIT wrote in to the contract that all the stuff that comes out of this $25Million deal has to be based on Open Source platforms, which rather precludes the mass proliferation of Windows on campus. cya
Actually I used to play Quake2 remotely and it worked fine, up till about 800x600, then things start getting sluggish. Running 2 copies of Quake on the same machine (don't do this unless you have plently of RAM) and displaying one on a remote machine and one on the local machine is no problem.
I was at this consortum. They had some tasty ice cream.
I think its a shame that the bio-computer people aren't talking to the nanite people as much as they should. It seems like the downward scaling problems of nanotechnology and the upward complexity problems of bio-computing could be solved if they got together and developed some sort of hybrid technology which used the strenghts of both.
It seems as if both parties are to blame. First, the original scientists who first discovered the effect, dubbed it cold fusion, right away. This was a fatal mistake. They didn't understand enough about what they were looking at before they dubbed it with such a weighty moniker. The word "fusion" means something very specific, and until they were sure that what they were looking at was in fact, a form of fusion, they should have chosen a name with fewer strings attached. The "Pons-Fleischmann Effect" would be a good choice. Instead they chose a name for which they had no theoretical basis.
This was blatantly irresponsible.
Pity. It is unfortunate that the scientific community has siezed on this obviously incredulous moniker, and rejected whatever science may lie behind it.
Is cold "The Pons-Fleischmann Effect" fusion? No. Almost certainly not.
It it "real." Possibly. Although it will take some time to sort through the calemetry data, and some new theory, before we can say for sure. What we really need are minds open to the possibilities.
Afterall, isn't that why we got into science in the first place?
Neutrons don't have to be such an issue. If we consider a fuel source of deuterium and He3, we will get hydrogen, He4 (which has been observed) and no neutrons. This does beg the question of where the He3 came from, which is very rare in nature, but I would not be so quick to discard this phenomenon.
It looks to me like there are some faculty members out there who want to bash the internet, but don't know enough about it to do so. They fear what they do not understand, and are looking for ammo. What ever happened to presenting both sides to the arguement? If I were you, I would be very wary about any negative comments I made about the net.
Paranoid? Yes, but it's the only reason I'm still alive.
Quantum Mechanics allows electrons to fill a finite number of states. Since electrons are fermions, they obey the Pauli exclusion principal: No two electrons can be in the same state at the same time. When you have a lare sample of something (like a copper wire) there are a bunch of states at the top, and most of them are unfilled. Insulators have no empty states, so there is no where for them to go. Conductors have lots of empty states, so they just glide along.
At superconductor temperatures, the vibrations of the atoms slow way down and the electrons tap in to these low freq vibrational modes (called phonons, but thats not importart) causing a net attraction between electrons. Which is wierd because normally electrons repel each other.
So then the electrons pair off (into Cooper Pairs, but still not important) but these pairs are no longer fermions. (This is the important part) Instead the pairs behave as Bosons, which don't obey the Pauli exclusion principle.
All the electron pairs end up in the same lowest energy state. Now when they travel, they all travel together, but they never have to worry about finding an empty state, so they don't loose any energy.
Superconductors not only have a critical temperature, below which they are superconductors, but also critical magnetic fields, below which they are superconducting. Critical Temp is usually on the order of liquid helium (4.5deg K) for elemental superconductors, and liquid nitrogen (70 deg K) for "High Temp" ceramic supercouctors. Critical magnetic fields are something like kilogauss to Tesela.
It is difficult to switch temperatures back and forth quickly. but its easy to turn magnetic fields on and off quickly.
Ceramic superconductors (unlike elemental SC like lead and vanadium) are good insulators when they are above the critical temperature/magnectic field curve.
If you wrap superconductor A in a loop around SC B, passing a current through A, and the loop was small enough/current big enough, the magnetic field produced through B would cause it to become an insulator. As soon as the current was turned off, it would be a SC again. Hence a gate.
The Josephson Junctions in my lab work a little differently. A very thin (about 10^-9 m) insulator is put between two superconductors, like a sandwich. The insulator is never superconducting. If a voltage is applied across the junction (greater that 2*superconductingbandgap/e) the junction behaves like a regular ohmic resistor (V = Ir). But smaller voltages produce very fast oscillation. Its not that its an insulator, its just that the current is oscillating back and forth so fast the the net current is 0. The oscillations are something like 500GHz/Volt. This gives sort of an odd effect where if the voltage across is zero, there is on current, but if there is a voltage, the net current is zero.
Feynman does a pretty good job of this in Feynman Lectures, Vol 3, chapt 21, I think. It one of the chapeters at the end.
The question of wether fusion reactors would produce significant radioactive byproducts is a little bit tricky. Unlike Fision, where you will inevitably get hoards of neutrons from the reaction and make everything near it glow in the dark, fusion depends on what fuels you use.
A lot of the research done is with D->T reactions, which make Helium-4 (which makes you talk funny) and a neutron, (which makes you glow) However, this is not the only fusion fuel source under consideration.
A T->He3 reaction produces Helium 4 and a regular hydrogen atom. No stray neutrons means basically no residual radiation.
I used to type on Qwerty, but I switched about 3 years ago. According to Mavis Beacon, my speed went from about 40 wpm to about 65 wpm. Not setting any records, but it's good for me. I have a friend though who went from 90wpm to 150wpm after he switched to dvorak. I'm pretty sure he's on crack, cause he types so fast it's scary. cya
This looks pretty neat, but it might sack one of the best things about portable MP3 players. The completely solid state RIO and others have no moving parts, so it is imposible for them to skip . They also have very low powerconsumption because they don't have any motors or ineffecient servos to drian power. The increase in storage space would be welcome, but it's too bad we can't get 350MB of solid state storage. That would really be something the druel over.
I don't know about Keanu's hacker skills, but his martial arts skills are legit. the martial arts guy who coreographed the fight scenes refused to work with Keanu unless he studdied Kung Fu in his dojo for four hours a day, every day for four months.
I have been noticing the level of tension surrounding religion has been swelling over the past few years. It seems as though the wealth of ideas expressed on the net has forced the issue in a lot of peoples heads. Were as before the net became so highly popularized, there was a pervasive trend of apathy and cluelessness toward religion. People just weren't thinking about it so much. Now with so much exposure on the net, the big question has made people either embrace it or reject it, but every one has an opinion.
This debate has sprawled out on the streets where people sport cars with decals of "Jesus" written in a fish, or "Darwin" written in a fish with leggs, or even a really big "Jesus" fish eating the little "Darwin" legged fish.
When Katz says that he's not sure weather Beudoin is right in saying that net culture will be more accepting of de-institutionalized religion, I think that many people will, but many people will also be repulsed by it too. But atleast this way, people will be thinking about it and making up their own minds in an informed manner, rather than having the dogma of the closest temple rammed down their throat.
Slashdot Mirror
RMS doesn't use a commandline either. He uses the EMACS mini-buffer.
In the summary, QuantumG makes the arguement that if keys are hard to get from legit devices, they will necessarily be hard to get from blak boxes too. This isn't necessairily true. If you are a cracker, you will need to peel back the insulation on the chip and understand the lithography of the chip (hard), or use a brute force, exhaustive search of the entire keyspace in software (not technically hard, but takes billions of years). However if you are CPRM, you have a list of all the valid keys sitting on your desk, so rather than an exhaustive search of the entire keyspace to find out what key a black box is using, you only need to test the keys on your list. This is trivial, and as such makes it very easy to deactivate a comprimised key, even though getting keys out of legit devices is still hard.
cya
The 850Z also has adjustable f-stop and shutter speed settings. I use these features quite often, but only because I have many years of experience with adjusting those settings with an SLR camera. If you aren't an experieced photographer, and you fool with those settings, you will probably make your shots look worse than if you had simply used a fully automatic camera.
Here are some images I took with the 850Z of a trip to Belgium
cya
I'm a junior at MIT in physics and computer science. This place is pretty hardcore UNIX and I don't think that is going to change overnight. We've spent the past 15 years developing our network operating environment (called Athena) and just because Bill wants to show a little cuff, we're not about to throw it out and start all over.
The deal is not as sinister as it sounds. The motivation is that MIT needs money to run its operations (which are quite costly) and MS wants to recruit. This really isn't about OS dominance.
I just spoke with Hal Abelson (CS professor who invented scheme and other things) and it appears that the MIT wrote in to the contract that all the stuff that comes out of this $25Million deal has to be based on Open Source platforms, which rather precludes the mass proliferation of Windows on campus.
cya
Actually I used to play Quake2 remotely and it worked fine, up till about 800x600, then things start getting sluggish. Running 2 copies of Quake on the same machine (don't do this unless you have plently of RAM) and displaying one on a remote machine and one on the local machine is no problem.
cya
I was at this consortum. They had some tasty ice cream.
I think its a shame that the bio-computer people aren't talking to the nanite people as much as they should. It seems like the downward scaling problems of nanotechnology and the upward complexity problems of bio-computing could be solved if they got together and developed some sort of hybrid technology which used the strenghts of both.
cya
We already have perpetual motion:
The mouths of the people who think it's possible.
Remind me to beat you over the head with the second law of thermal dynamics, next time i see you.
cya
It seems as if both parties are to blame. First, the original scientists who first discovered the effect, dubbed it cold fusion, right away. This was a fatal mistake. They didn't understand enough about what they were looking at before they dubbed it with such a weighty moniker. The word "fusion" means something very specific, and until they were sure that what they were looking at was in fact, a form of fusion, they should have chosen a name with fewer strings attached. The "Pons-Fleischmann Effect" would be a good choice. Instead they chose a name for which they had no theoretical basis.
This was blatantly irresponsible.
Pity. It is unfortunate that the scientific community has siezed on this obviously incredulous moniker, and rejected whatever science may lie behind it.
Is cold "The Pons-Fleischmann Effect" fusion? No. Almost certainly not.
It it "real." Possibly. Although it will take some time to sort through the calemetry data, and some new theory, before we can say for sure. What we really need are minds open to the possibilities.
Afterall, isn't that why we got into science in the first place?
cya
Neutrons don't have to be such an issue. If we consider a fuel source of deuterium and He3, we will get hydrogen, He4 (which has been observed) and no neutrons. This does beg the question of where the He3 came from, which is very rare in nature, but I would not be so quick to discard this phenomenon.
cya
It looks to me like there are some faculty members out there who want to bash the internet, but don't know enough about it to do so. They fear what they do not understand, and are looking for ammo. What ever happened to presenting both sides to the arguement? If I were you, I would be very wary about any negative comments I made about the net.
Paranoid? Yes, but it's the only reason I'm still alive.
cya
Quantum Mechanics allows electrons to fill a finite number of states. Since electrons are fermions, they obey the Pauli exclusion principal: No two electrons can be in the same state at the same time. When you have a lare sample of something (like a copper wire) there are a bunch of states at the top, and most of them are unfilled. Insulators have no empty states, so there is no where for them to go. Conductors have lots of empty states, so they just glide along.
At superconductor temperatures, the vibrations of the atoms slow way down and the electrons tap in to these low freq vibrational modes (called phonons, but thats not importart) causing a net attraction between electrons. Which is wierd because normally electrons repel each other.
So then the electrons pair off (into Cooper Pairs, but still not important) but these pairs are no longer fermions. (This is the important part) Instead the pairs behave as Bosons, which don't obey the Pauli exclusion principle.
All the electron pairs end up in the same lowest energy state. Now when they travel, they all travel together, but they never have to worry about finding an empty state, so they don't loose any energy.
cya
Superconductors not only have a critical temperature, below which they are superconductors, but also critical magnetic fields, below which they are superconducting. Critical Temp is usually on the order of liquid helium (4.5deg K) for elemental superconductors, and liquid nitrogen (70 deg K) for "High Temp" ceramic supercouctors. Critical magnetic fields are something like kilogauss to Tesela.
It is difficult to switch temperatures back and forth quickly. but its easy to turn magnetic fields on and off quickly.
Ceramic superconductors (unlike elemental SC like lead and vanadium) are good insulators when they are above the critical temperature/magnectic field curve.
If you wrap superconductor A in a loop around SC B, passing a current through A, and the loop was small enough/current big enough, the magnetic field produced through B would cause it to become an insulator. As soon as the current was turned off, it would be a SC again. Hence a gate.
cya
I beleive this is incorrect.
The Josephson Junctions in my lab work a little differently. A very thin (about 10^-9 m) insulator is put between two superconductors, like a sandwich. The insulator is never superconducting. If a voltage is applied across the junction (greater that 2*superconductingbandgap/e) the junction behaves like a regular ohmic resistor (V = Ir). But smaller voltages produce very fast oscillation. Its not that its an insulator, its just that the current is oscillating back and forth so fast the the net current is 0. The oscillations are something like 500GHz/Volt. This gives sort of an odd effect where if the voltage across is zero, there is on current, but if there is a voltage, the net current is zero.
Feynman does a pretty good job of this in Feynman Lectures, Vol 3, chapt 21, I think. It one of the chapeters at the end.
cya
The question of wether fusion reactors would produce significant radioactive byproducts is a little bit tricky. Unlike Fision, where you will inevitably get hoards of neutrons from the reaction and make everything near it glow in the dark, fusion depends on what fuels you use.
A lot of the research done is with D->T reactions, which make Helium-4 (which makes you talk funny) and a neutron, (which makes you glow) However, this is not the only fusion fuel source under consideration.
A T->He3 reaction produces Helium 4 and a regular hydrogen atom. No stray neutrons means basically no residual radiation.
cya
I used to type on Qwerty, but I switched about 3 years ago. According to Mavis Beacon, my speed went from about 40 wpm to about 65 wpm. Not setting any records, but it's good for me. I have a friend though who went from 90wpm to 150wpm after he switched to dvorak. I'm pretty sure he's on crack, cause he types so fast it's scary.
cya
This looks pretty neat, but it might sack one of the best things about portable MP3 players. The completely solid state RIO and others have no moving parts, so it is imposible for them to skip . They also have very low powerconsumption because they don't have any motors or ineffecient servos to drian power. The increase in storage space would be welcome, but it's too bad we can't get 350MB of solid state storage. That would really be something the druel over.
cya
I don't know about Keanu's hacker skills, but his martial arts skills are legit. the martial arts guy who coreographed the fight scenes refused to work with Keanu unless he studdied Kung Fu in his dojo for four hours a day, every day for four months.
cya
This debate has sprawled out on the streets where people sport cars with decals of "Jesus" written in a fish, or "Darwin" written in a fish with leggs, or even a really big "Jesus" fish eating the little "Darwin" legged fish.
When Katz says that he's not sure weather Beudoin is right in saying that net culture will be more accepting of de-institutionalized religion, I think that many people will, but many people will also be repulsed by it too. But atleast this way, people will be thinking about it and making up their own minds in an informed manner, rather than having the dogma of the closest temple rammed down their throat.
cya
.sig
cya
There is a UNICODE char for the backwards R, its the "Ya" sound in Russian.
Toys Ya Us. I like it.