How about protecting the rights of inventors in order to stimulate creation? Patents, especially in the field of medicine, provide an incentive for development. I know that my father (a preeminent Johns Hopkins physician and professor) founded a company that develops new techniques for developing cancer. His company does not actually provide services, he simply uses his knowledge of medicine to bring about advances in the field. Without patent royalties, he wouldn't be able to maintain his company and do any more research.
Once they hit high school, boys seem better at solving more complex problems.
That was actually a hypothesis, not a result. If it were a result than the claim that "No gap found" wouldn't make sense.
What they did find was that, in standardized tests, Asian boys and girls score fairly equally, which would appear to reverse the hypothesis from the study 20 years ago EXCEPT that the study also revealed 'very few level 3 and 4 questions' (on a scale from 1-4, 4 being the hardest).
I'm going to quote from the article now, since I don't have access to the paper:
It won't be a new message. Nearly 20 years ago, a large-scale study led by psychologist Janet Hyde of the University of Wisconsin, Madison, found a "trivial" gap in math test scores between boys and girls in elementary and middle school. But it did suggest that boys were better at solving more complex problems by the time they got to high school.
It seems like they are insinuating that all the hypotheses from the 20-year-old study have been rebuked, but how could they possibly draw conclusions on complex math performance if their testing material didn't have any complex math?
I learned Python as my first language when I was 10 and moved on to C++ at 11 and 12, where I moved to learn C, Perl, and Java, Scheme, etc, etc.
My advice: Don't be a teacher. When your son is stuck or needs a pointer here and there, be there to move things along, but don't be a teacher. After seeing some fellow CS students who don't have any interest outside of class and only learned in class, I started to realize that I had the most respect for those who taught themselves.
Providing pointers will allow your son to progress quickly (not getting bogged down in annoying conventions) but not taking away the fun of innovation. There used to be an old school mentality of crappy documentation, code snippets, dial-up internet, and late night hacking which has quickly deteriorated. Teach your son to teach himself and I will be thrilled to work with him.:)
You may, but much of the enterprise web development world doesn't. Sorry to break it to you, but PHP really isn't that popular in massive corporation websites. Regardless of the quality of this review, Fortify is a fairly well entrenched security code analysis tool that many corporations use. I would say a number of Fortune 500 companies who use Java that had security analyses done at my former employer, but that is confidential.
Mostly because its a dissociation equation - it doesnt actually represent a compound, the final result is simply an accumulation of ions in an aqueous solution. CaCO3 doesn't react with water alone, that's why it is a precipitate in the second equation.
I guess I should give a more exact explanation of the third equation. Essentially, that is a redissolution forced by vast quantities (overabundance) of carbon dioxide in the environment. Now, I included this equation for background, but I don't foresee it happening spontaneously without people forcing CO2 into the solution. However, I should be clear that CaCO3 (limestone) is normally insoluble in water (see general solubility rules) and will instead produce a cloudy, milky white solution (easy experiment if you want to do it yourself).
No, that's just... not right. At all. The superconductor issue has been dealt with but your last statement is wrong too. At hypothetical "absolute zero" there is no energy in the containing matter, meaning that there is absolutely no temperature and movement at the quantum level. As you may remember from basic quantum mechanics, SchrÃdinger's law states that, as the certainty in position increases, the uncertainty in velocity also increases. At absolute zero, we would have the exact position and exact velocity of each quantum mechanical elementary particle. More specifically, the exact minimum energy for a quantum SHO is 1/2(h-bar)(omega).
I would post the wave equation, but Slashdot's markup system can't handle it. Someone really needs to revise this to have both Unicode and LaTeX support. Especially for a tech/math/sci new site.
Some of these compounds are strong bases that may be dangerous for both human consumption and wildlife contact. If this were done in segregated water areas, however, it may be possible to utilize the properties of the first reaction to produce energy via a heat engine.
If I read the article right, this would seem to say that we are witnessing this galaxy forming approximately 12.3 billion light years ago. As to the answer of whether or not this galaxy is exceptional, I guess the most interesting answer may be if this galaxy is 'currently' producing stars at the same rate as the Milky Way (~10 per year). Unfortunately, the only way I can see to figure that out is to wait another 12.3 billion years. I don't know about you guys, but I'm starting stocking up on beer now.
The problem is that Alice has been communicating with Bob on an insecure channel using DES. In addition, Alice has many past conversations available with their plaintext in a log that is publicly available to Mallory. Mallory then proceeds to perform a differential cryptanalysis using known-plaintext attacks. Once there, he performs a man in the middle attack with Bob, convincing him that Alice needs company funds to research the adoption. Bob then transfers the money to Mallory's account with no one the wiser.
Jan: Well, what would you suggest. Michael: A statue. Jan: Of Ed? Michael: Yeah. Jan: I'm not sure that's realistic. Michael: Well, I think it would be very realistic. It would look just like him. Jan: No, that's not ⦠Michael: We could have his eyes light up, we could have his arms move ⦠Dwight: That is not a statue, that is a robot. Michael: I think that is a great way to honor Ed. Dwight: And how big do you want this robot? Michael: Life size. Dwight: Mmm, no. Better make it two-thirds. Easier to stop it if it turns on us. Jan: What the hell are you two talking about?
Dwight: Look, I gave him a six-foot extension cord so he can't chase us. Michael: That's perfect.
Couldn't agree more. In fact, you may need to learn even more about the system than the designer did. For example, while Rijndael (AES as many know it) is fairly secure from a wide range of cryptographic attacks, because the designer didn't recognize the ability of an attacker to monitor the hardware, a significant side-channel attack in the form of timing has been used to crack it. Security requires not just the programming skills to evaluate if the algorithm is implemented correctly, but also the ability to evaluate the whole system. Nobody thought that someone would be able to measure the power usage on an RSA module in order to compromise key generation, but someone managed to do it. I might get some flak for this, but it is my belief that computer security may be the most difficult subset of computer science in that regard.
The exception to this may be computer security. Obviously, one can specialize, but it is often helpful, if not essential, for a cryptographer to understand everything from RAM timing to the complicated mathematics of cryptography in order to build an architecture that is secure from all avenues, including side-channel attacks. A Java programmer can often use the API's with impunity, but comp sec programmers should recognize that the API itself is often insecure and a new direction needs to be created (i.e. using char[]s instead of Strings because Strings are immutable and the RAM section can't be cleared).
Fuck a $1,000,000? That's NOTHING compared to the implications. Let's see if I can simplify this. For context let me just state that some of the most brilliant mathematicians in the world spend their entire lives studying this hypothesis.
However, as a cryptographer I am interested in an especially important part - if the Riemann hypothesis can be extrapolated, it can possibly be used to factor very very large numbers by tracing the primes in the Riemann zeta function. If you look it up, you'll find that the Riemann zeta function is interesting in how it predicts the distribution of primes in the reals. The implications for factoring are very simple.
RSA is based on factoring.
The most commonly used public-key encryption algorithm is highly dependent on factoring. If the solution can be extrapolated, RSA could be broken. This is earth-shattering. I can't even express the kinds of ramifications that could take place if someone managed to reduce factoring to a polynomial time solution.
Now, even if the hypothesis has been solved, there is no guarantee that it can be used for factoring or that a polynomial time algorithm could be created. Still... it's getting a little too close for comfort for me.
No need to open holes in your firewall except for SSH, which is pretty safe to do.
I would strongly disagree with this statement. Because ssh has the ability to do so much, it deserves special attention to security. The default implementation should be tweaked more than a little bit, including disabling password login, changing the port and, please don't forget, disabling ssh1. There are other, more subtle, cryptographic attacks, but even those few changes should make it more secure.
If all you are doing is establishing a persistent ssh connection, you may want to think about using dtach. It's the equivalent of vi to emacs. Why use an operating system when all you need is a text editor?
Uhh.. What? Slashdot should know Maxwell's Laws. A monopole is theoretical at best. Many physicists don't think they exist or, if they do, they're so large we'll never actually encounter one. In that case, the following law would hold.
âo (surface integral) B dS = 0, i.e. the magnetic net magnetic flux over any surface S equals 0, thus requiring the same number of fields entering as leaving, making a magnetic monopole impossible.
Yeah... I don't think so. I think we've got glasses pretty much down. There may be some advances in laser eye surgery, but in terms of optics you're looking at applications in quantum mechanics, civil engineering, materials engineering, chemistry, nuclear development, military applications... basically everything but optometry. Hint: You're wrong.
Common carriers don't have any requirement of offering the same quality of service to different contractors, especially at the same price. Network neutrality, in some definitions, holds that requirement. In addition, common carriers are held responsible for traffic across their infrastructure - this is a completely different issue.
Slashdot Mirror
How about protecting the rights of inventors in order to stimulate creation? Patents, especially in the field of medicine, provide an incentive for development. I know that my father (a preeminent Johns Hopkins physician and professor) founded a company that develops new techniques for developing cancer. His company does not actually provide services, he simply uses his knowledge of medicine to bring about advances in the field. Without patent royalties, he wouldn't be able to maintain his company and do any more research.
You are wrong, both Thomas Jefferson and John Locke supported copyright (Jefferson didn't like it in the Constitution, though). http://www.geocities.com/Athens/7842/archives/copy.htm
Also, John Locke was the true pioneer and he did far more for empiricism and governmental theory than Jefferson ever did.
Once they hit high school, boys seem better at solving more complex problems.
That was actually a hypothesis, not a result. If it were a result than the claim that "No gap found" wouldn't make sense.
What they did find was that, in standardized tests, Asian boys and girls score fairly equally, which would appear to reverse the hypothesis from the study 20 years ago EXCEPT that the study also revealed 'very few level 3 and 4 questions' (on a scale from 1-4, 4 being the hardest).
I'm going to quote from the article now, since I don't have access to the paper:
It won't be a new message. Nearly 20 years ago, a large-scale study led by psychologist Janet Hyde of the University of Wisconsin, Madison, found a "trivial" gap in math test scores between boys and girls in elementary and middle school. But it did suggest that boys were better at solving more complex problems by the time they got to high school.
It seems like they are insinuating that all the hypotheses from the 20-year-old study have been rebuked, but how could they possibly draw conclusions on complex math performance if their testing material didn't have any complex math?
Wait so:
result 1: While previously it had been believed that boys solved harder mathematics questions more adeptly, that trend has been reversed.
result 2: Our standardized test material contained no hard mathematics questions.
Does anyone see anything wrong with this? Their results may be true, but that doesn't mean the study was valid.
I learned Python as my first language when I was 10 and moved on to C++ at 11 and 12, where I moved to learn C, Perl, and Java, Scheme, etc, etc.
My advice:
Don't be a teacher. When your son is stuck or needs a pointer here and there, be there to move things along, but don't be a teacher. After seeing some fellow CS students who don't have any interest outside of class and only learned in class, I started to realize that I had the most respect for those who taught themselves.
Providing pointers will allow your son to progress quickly (not getting bogged down in annoying conventions) but not taking away the fun of innovation. There used to be an old school mentality of crappy documentation, code snippets, dial-up internet, and late night hacking which has quickly deteriorated. Teach your son to teach himself and I will be thrilled to work with him. :)
You may, but much of the enterprise web development world doesn't. Sorry to break it to you, but PHP really isn't that popular in massive corporation websites. Regardless of the quality of this review, Fortify is a fairly well entrenched security code analysis tool that many corporations use. I would say a number of Fortune 500 companies who use Java that had security analyses done at my former employer, but that is confidential.
That may be true, I'm not familiar with lime production, only a little chem ;)
Mostly because its a dissociation equation - it doesnt actually represent a compound, the final result is simply an accumulation of ions in an aqueous solution. CaCO3 doesn't react with water alone, that's why it is a precipitate in the second equation.
I guess I should give a more exact explanation of the third equation. Essentially, that is a redissolution forced by vast quantities (overabundance) of carbon dioxide in the environment. Now, I included this equation for background, but I don't foresee it happening spontaneously without people forcing CO2 into the solution. However, I should be clear that CaCO3 (limestone) is normally insoluble in water (see general solubility rules) and will instead produce a cloudy, milky white solution (easy experiment if you want to do it yourself).
No, that's just... not right. At all. The superconductor issue has been dealt with but your last statement is wrong too. At hypothetical "absolute zero" there is no energy in the containing matter, meaning that there is absolutely no temperature and movement at the quantum level. As you may remember from basic quantum mechanics, SchrÃdinger's law states that, as the certainty in position increases, the uncertainty in velocity also increases. At absolute zero, we would have the exact position and exact velocity of each quantum mechanical elementary particle. More specifically, the exact minimum energy for a quantum SHO is 1/2(h-bar)(omega).
I would post the wave equation, but Slashdot's markup system can't handle it. Someone really needs to revise this to have both Unicode and LaTeX support. Especially for a tech/math/sci new site.
That first equation has a reversible arrow (< - >) in it after H_2O; slashdot thought "-" was an html tag... :-/
In case anyone was wondering:
Lime = CaO
CaO + H_2O Ca(OH)_2 + 63.7kJ/mol of CaO
Ca(OH)_2 (aq) + CO_2 (g) -> CaCO_3 (s) + H_2O (l)
CaCO3(s) + CO2(g) + H2O(l) -> Ca(HCO3)2(aq)
Some of these compounds are strong bases that may be dangerous for both human consumption and wildlife contact. If this were done in segregated water areas, however, it may be possible to utilize the properties of the first reaction to produce energy via a heat engine.
That would be 12.3 billion "years" ago :) Damn typos.
If I read the article right, this would seem to say that we are witnessing this galaxy forming approximately 12.3 billion light years ago. As to the answer of whether or not this galaxy is exceptional, I guess the most interesting answer may be if this galaxy is 'currently' producing stars at the same rate as the Milky Way (~10 per year). Unfortunately, the only way I can see to figure that out is to wait another 12.3 billion years. I don't know about you guys, but I'm starting stocking up on beer now.
The problem is that Alice has been communicating with Bob on an insecure channel using DES. In addition, Alice has many past conversations available with their plaintext in a log that is publicly available to Mallory. Mallory then proceeds to perform a differential cryptanalysis using known-plaintext attacks. Once there, he performs a man in the middle attack with Bob, convincing him that Alice needs company funds to research the adoption. Bob then transfers the money to Mallory's account with no one the wiser.
(Cryptographer's joke ;) http://en.wikipedia.org/wiki/Alice_and_Bob#List_of_characters )
Jan: Well, what would you suggest.
Michael: A statue.
Jan: Of Ed?
Michael: Yeah.
Jan: I'm not sure that's realistic.
Michael: Well, I think it would be very realistic. It would look just like him.
Jan: No, that's not â¦
Michael: We could have his eyes light up, we could have his arms move â¦
Dwight: That is not a statue, that is a robot.
Michael: I think that is a great way to honor Ed.
Dwight: And how big do you want this robot?
Michael: Life size.
Dwight: Mmm, no. Better make it two-thirds. Easier to stop it if it turns on us.
Jan: What the hell are you two talking about?
Dwight: Look, I gave him a six-foot extension cord so he can't chase us.
Michael: That's perfect.
Couldn't agree more. In fact, you may need to learn even more about the system than the designer did. For example, while Rijndael (AES as many know it) is fairly secure from a wide range of cryptographic attacks, because the designer didn't recognize the ability of an attacker to monitor the hardware, a significant side-channel attack in the form of timing has been used to crack it. Security requires not just the programming skills to evaluate if the algorithm is implemented correctly, but also the ability to evaluate the whole system. Nobody thought that someone would be able to measure the power usage on an RSA module in order to compromise key generation, but someone managed to do it. I might get some flak for this, but it is my belief that computer security may be the most difficult subset of computer science in that regard.
The exception to this may be computer security. Obviously, one can specialize, but it is often helpful, if not essential, for a cryptographer to understand everything from RAM timing to the complicated mathematics of cryptography in order to build an architecture that is secure from all avenues, including side-channel attacks. A Java programmer can often use the API's with impunity, but comp sec programmers should recognize that the API itself is often insecure and a new direction needs to be created (i.e. using char[]s instead of Strings because Strings are immutable and the RAM section can't be cleared).
Fuck a $1,000,000? That's NOTHING compared to the implications. Let's see if I can simplify this. For context let me just state that some of the most brilliant mathematicians in the world spend their entire lives studying this hypothesis.
However, as a cryptographer I am interested in an especially important part - if the Riemann hypothesis can be extrapolated, it can possibly be used to factor very very large numbers by tracing the primes in the Riemann zeta function. If you look it up, you'll find that the Riemann zeta function is interesting in how it predicts the distribution of primes in the reals. The implications for factoring are very simple.
RSA is based on factoring.
The most commonly used public-key encryption algorithm is highly dependent on factoring. If the solution can be extrapolated, RSA could be broken. This is earth-shattering. I can't even express the kinds of ramifications that could take place if someone managed to reduce factoring to a polynomial time solution.
Now, even if the hypothesis has been solved, there is no guarantee that it can be used for factoring or that a polynomial time algorithm could be created. Still... it's getting a little too close for comfort for me.
No need to open holes in your firewall except for SSH, which is pretty safe to do.
I would strongly disagree with this statement. Because ssh has the ability to do so much, it deserves special attention to security. The default implementation should be tweaked more than a little bit, including disabling password login, changing the port and, please don't forget, disabling ssh1. There are other, more subtle, cryptographic attacks, but even those few changes should make it more secure.
If all you are doing is establishing a persistent ssh connection, you may want to think about using dtach. It's the equivalent of vi to emacs. Why use an operating system when all you need is a text editor?
Let's be honest here. Two replying to yourself and getting modded up to 5 again? You were just hoarding karma weren't you. ;)
Uhh.. What? Slashdot should know Maxwell's Laws. A monopole is theoretical at best. Many physicists don't think they exist or, if they do, they're so large we'll never actually encounter one. In that case, the following law would hold.
âo (surface integral) B dS = 0, i.e. the magnetic net magnetic flux over any surface S equals 0, thus requiring the same number of fields entering as leaving, making a magnetic monopole impossible.
Yeah... I don't think so. I think we've got glasses pretty much down. There may be some advances in laser eye surgery, but in terms of optics you're looking at applications in quantum mechanics, civil engineering, materials engineering, chemistry, nuclear development, military applications... basically everything but optometry. Hint: You're wrong.
http://www.idiom.com/~zilla/Computer/javaCbenchmark.html
Nope, it's network neutrality.
http://www.cybertelecom.org/notes/common_carrier.htm
Common carriers don't have any requirement of offering the same quality of service to different contractors, especially at the same price. Network neutrality, in some definitions, holds that requirement. In addition, common carriers are held responsible for traffic across their infrastructure - this is a completely different issue.