My understanding is that one of the killers (no pun intended) of the Orion concept was that radioactive ejecta from the drive would inevitably find its way to ground-level, even if it was operating in Lunar orbit. It was mentioned in Dyson's book _Project Orion_ that they had estimated the number of annual excess deaths from cancer caused by launching a single Orion from ground as well as from various orbits.
Since this concept will still eject various nasty radioisotopes as well, I wonder if they've done the same analysis.
There's three ways to attack a hash: attack collision resistance, attack pre-image resistance, and attacking the plaintext.
Collision resistance means it should be difficult to find two texts that have the same hash value. The upper bound for these attacks is 2^(n/2), where n is the length of the hash. For SHA-1, that upper bound it 2^80. Because of some more sophisticated attacks, 2^63 is now the current best for a collision attack.
Pre-image resistance means given a hash it should be impossible to find a text that hashes to that value. The upper bound for pre-image attacks is (2^n)/2, where n is the length of the hash. For SHA-1, this is 2^159, and AFAIK hasn't been reduced any.
The plaintext attack is as you describe; totally dependent on length of the text and the size of the character set.
Note that a 10 character password with a 64 character set would take 4096 days with the same device.
Ignoring the delusional doesn't make them go away. In fact, it gives them space to convince others of their delusion.
You counter delusion by confronting it at every turn. Look at the school board reversals this last year; the crazies tried to impose their nonsense and were publicly confronted--and they lost.
As part of the poor part of the population you expect to live at most 30-40 years
Bzzt. Incorrect, but thank you for playing.
While average life expectancy was certainly in that range, that was mainly because of all the babies dying before their fifth birthday. Average life expectancy past adulthood is a more useful measure of lifespan, and that number hasn't changed by more than about 10% over the last century--it was 76 in 1920, and it's 80 now.
My son's girlfriend's step-father sells used cars. He can't move a used SUV for love or money, and he's still inundated with people who are upside-down on their SUV loan and looking to get out--and can't.
And it should filter my email, answer my phone, raise my kids, and cook me gourmet meals on demand using only ingredients collected from my yard clippings.
Because if it doesn't do these things, it'll *obviously* be a failure. Since I said it on/. it *must* be true!
We will not physically go to the stars... But our genome will.
The difficulties and economics of mounting any expedition to take human beings bodily to the stars are of course well-documented. But a robot ship with records of human, plant, and animal DNA is almost within our reach today. Imagine a Von Neumann machine replicating itself--and our genome stored as data--and spreading through the galaxy and seeding earth-life as suitable worlds are found. We could saturate the galaxy in a few million years.
It's not colonization as we normally think of it, but it would do the job. And it would be within reach of even private organizations in a few decades--providing we don't screw things up here too badly first.
Google "irreducible complexity" as that's what "creation scientists" like to call it. The counter-argument is simple; such a system could simply have evolved from *more* complex system, or even a system that served a wholly different purpose.
Arguments based on irreducible complexity stem from a flawed understanding of evolution. Evolution does *not* posit that development is in the direction of more complexity.
It's a simple keyed hash challenge-response protocol. The host & controller share a key. The controller generates a nonce and sends it to the host. The host XORs the nonce with the key and returns the SHA-1 hash. The controller compares the hash to a hash it calculates and if they match you're off to the races.
The XOR of key & nonce seems extraneous to me, but I don't think it impacts the algorithm.
The flaw, of course, is the assumption that the attacker--who possesses the hardware--won't be able to extract the key from the host or controller.
Your problem is your inability to see that at least in democratic societies we the citizenry are indistinguishable from the government. There is no "us" and "them," only "we together." Your insistence on this entirely invented division is blinding you to the fact that only the existence of the democratic government allows you to engage in the fantasy that we can live free without it. The sad part is your belief in this fallacy is self-fulfilling; it creates in you a poisonous cynicism about community-as-government that you're unable to participate in the community with an honest desire to see community efforts succeed. When even a small number of spoiler think and act like this, it poisons the well for the rest of us.
You know, I *used* to think like you, then I grew up, got married, and came to understand the hard way how Libertarian World would actually function when implemented in the real world with real people affecting real lives. If you *like* the idea of rule by strongman--the inevitable result of a society based on the libertarian fantasy of "enlightened self-interest"--then I suppose we have nothing to discuss.
"My point was that they were required to [do drill as homework] but DID NOT."
Then:
"Adequate drill cannot be achieved in class, because all the time is spent trying to explain stuff to uninterested children. It can however be achieved by giving them homework."
"Otherwise you end up like some people in my class who, at the age of 18, did not "remember" how to solve 2ng grade equations while everybody else was discussing calculus."
People in your class who, it must be pointed out, were required to do homework. What was your point again?
I have no problem with no homework. I don't bring work home, why should my kids? But I'd substitute longer class times, which is something else with which some schools are experimenting. Middle and high schools can use A/B day schedules with 1.5 hour classes and cover the same material per semester.
In deference to your point, longer class times will still allow for adequate drill. The advantage is that class time spent doing drill material is time that the teacher can spend on one-on-one instruction, grading papers, or working on lesson plans. (And don't think that reducing the after-hours work on teachers won't have an in-class benefit, either.)
Call of Duty 3 is rocking my world at the moment. I can *finally* play an FPS effectively on a console; now I can't wait for Metroid.
I can't emphasize enough how much fun Elebits and Rayman are, as well. I'll start Zelda this weekend when I have some time to really play.
Wii Sports and Wii Play will probably live forever as party games, and for quite some time as a workout game. Wii Sports Boxing with some wrist weights could be seriously beneficial.
Slashdot Mirror
What good is unlimited cellular data if I can't use it with my laptop?
My understanding is that one of the killers (no pun intended) of the Orion concept was that radioactive ejecta from the drive would inevitably find its way to ground-level, even if it was operating in Lunar orbit. It was mentioned in Dyson's book _Project Orion_ that they had estimated the number of annual excess deaths from cancer caused by launching a single Orion from ground as well as from various orbits.
Since this concept will still eject various nasty radioisotopes as well, I wonder if they've done the same analysis.
There's three ways to attack a hash: attack collision resistance, attack pre-image resistance, and attacking the plaintext.
Collision resistance means it should be difficult to find two texts that have the same hash value. The upper bound for these attacks is 2^(n/2), where n is the length of the hash. For SHA-1, that upper bound it 2^80. Because of some more sophisticated attacks, 2^63 is now the current best for a collision attack.
Pre-image resistance means given a hash it should be impossible to find a text that hashes to that value. The upper bound for pre-image attacks is (2^n)/2, where n is the length of the hash. For SHA-1, this is 2^159, and AFAIK hasn't been reduced any.
The plaintext attack is as you describe; totally dependent on length of the text and the size of the character set.
Note that a 10 character password with a 64 character set would take 4096 days with the same device.
Ignoring the delusional doesn't make them go away. In fact, it gives them space to convince others of their delusion.
You counter delusion by confronting it at every turn. Look at the school board reversals this last year; the crazies tried to impose their nonsense and were publicly confronted--and they lost.
An important lesson there.
Then again, MS Office is not (yet) a universal binary, so it's still running under Rosetta on new Macs, so the comparison isn't fair.
Too bad you're wrong about that.
As part of the poor part of the population you expect to live at most 30-40 years
Bzzt. Incorrect, but thank you for playing.
While average life expectancy was certainly in that range, that was mainly because of all the babies dying before their fifth birthday. Average life expectancy past adulthood is a more useful measure of lifespan, and that number hasn't changed by more than about 10% over the last century--it was 76 in 1920, and it's 80 now.
What, he's never heard of a symlink attack?
My son's girlfriend's step-father sells used cars. He can't move a used SUV for love or money, and he's still inundated with people who are upside-down on their SUV loan and looking to get out--and can't.
And it should filter my email, answer my phone, raise my kids, and cook me gourmet meals on demand using only ingredients collected from my yard clippings.
/. it *must* be true!
Because if it doesn't do these things, it'll *obviously* be a failure. Since I said it on
Only without the abysmal wages.
I'm reasonably sure that "suicide by enemy action" isn't included in those statistics.
We will not physically go to the stars... But our genome will.
The difficulties and economics of mounting any expedition to take human beings bodily to the stars are of course well-documented. But a robot ship with records of human, plant, and animal DNA is almost within our reach today. Imagine a Von Neumann machine replicating itself--and our genome stored as data--and spreading through the galaxy and seeding earth-life as suitable worlds are found. We could saturate the galaxy in a few million years.
It's not colonization as we normally think of it, but it would do the job. And it would be within reach of even private organizations in a few decades--providing we don't screw things up here too badly first.
...the single dumbest fucking argument in the world.
> Non-decomposable structures
Google "irreducible complexity" as that's what "creation scientists" like to call it. The counter-argument is simple; such a system could simply have evolved from *more* complex system, or even a system that served a wholly different purpose.
Arguments based on irreducible complexity stem from a flawed understanding of evolution. Evolution does *not* posit that development is in the direction of more complexity.
You're confusing "bias" with "opinion," dipshit. Opinion is "I think..." whereas bias is "No matter what, I believe..."
No, it's not. Not even close.
It's a simple keyed hash challenge-response protocol. The host & controller share a key. The controller generates a nonce and sends it to the host. The host XORs the nonce with the key and returns the SHA-1 hash. The controller compares the hash to a hash it calculates and if they match you're off to the races.
The XOR of key & nonce seems extraneous to me, but I don't think it impacts the algorithm.
The flaw, of course, is the assumption that the attacker--who possesses the hardware--won't be able to extract the key from the host or controller.
At least I have the guts to post under my account, you waste of seminal fluid.
Your problem is your inability to see that at least in democratic societies we the citizenry are indistinguishable from the government. There is no "us" and "them," only "we together." Your insistence on this entirely invented division is blinding you to the fact that only the existence of the democratic government allows you to engage in the fantasy that we can live free without it. The sad part is your belief in this fallacy is self-fulfilling; it creates in you a poisonous cynicism about community-as-government that you're unable to participate in the community with an honest desire to see community efforts succeed. When even a small number of spoiler think and act like this, it poisons the well for the rest of us.
You know, I *used* to think like you, then I grew up, got married, and came to understand the hard way how Libertarian World would actually function when implemented in the real world with real people affecting real lives. If you *like* the idea of rule by strongman--the inevitable result of a society based on the libertarian fantasy of "enlightened self-interest"--then I suppose we have nothing to discuss.
Because in the real world, unlike Libertarian Fantasy Island, not everyone plays well with others.
And that fishy smell is the rotten stink of your ideology.
Hey dumbass: People coming together to solve problems themselves--that's what government *is*.
Sheesh. The level of libertarian crap around here is astounding.
Which part of "To promote the progress of science and useful arts" is unclear?
Do you read your own postings?
First:
"My point was that they were required to [do drill as homework] but DID NOT."
Then:
"Adequate drill cannot be achieved in class, because all the time is spent trying to explain stuff to uninterested children. It can however be achieved by giving them homework."
You see the self-contradiction, I hope.
"Otherwise you end up like some people in my class who, at the age of 18, did not "remember" how to solve 2ng grade equations while everybody else was discussing calculus."
People in your class who, it must be pointed out, were required to do homework. What was your point again?
I have no problem with no homework. I don't bring work home, why should my kids? But I'd substitute longer class times, which is something else with which some schools are experimenting. Middle and high schools can use A/B day schedules with 1.5 hour classes and cover the same material per semester.
In deference to your point, longer class times will still allow for adequate drill. The advantage is that class time spent doing drill material is time that the teacher can spend on one-on-one instruction, grading papers, or working on lesson plans. (And don't think that reducing the after-hours work on teachers won't have an in-class benefit, either.)
Got mine today. :)
Call of Duty 3 is rocking my world at the moment. I can *finally* play an FPS effectively on a console; now I can't wait for Metroid.
I can't emphasize enough how much fun Elebits and Rayman are, as well. I'll start Zelda this weekend when I have some time to really play.
Wii Sports and Wii Play will probably live forever as party games, and for quite some time as a workout game. Wii Sports Boxing with some wrist weights could be seriously beneficial.