Still, to say that Microsoft has been focused on security since Windows NT wasn't a good way to start out his answer.:-(
They way I interpreted it was that while they focused on security since NT (after all, it did have a security model with user permissions etc), their focus was wrong and too limited. They only focused on a very small part of the puzzle, and they totally ignored other important security aspects (from secure code to "why does this service need admin privs anyway"). And they've been working on that ever since, albeit slowly one might argue;)
you need a set of pratt & whitney jet engines to supply sufficient power to AMD chips. Then, there's all that heat.
I run an AMD X2 3800+, an Nvidia GT6800 PCIe and three HD's (including two WD Raptors) off a 350W PSU, and I have exactly zero stability issues. Using a typical Zalman cooler, the CPU runs at about 45C under full load (two Folding@home instances). The GT6800 is miles ahead in the heating department compared to the X2.
TFA says that Apple, for example, might be charged a nickle or dime per song to make sure that the data transfers completely and quickly. Ignoring the big bad implications of the word "completely," I just dont' get it.
I could understand it if they provided an additional service. For instance, providing a local high bandwidth proxy/caching service. This could ensure that watching music videos would be a smooth experience regardless. How much it's worth however is another issue.
The technique is used in tandem accelerators. You have a grid that is negatively charged (so it attracts the ions) immediately prior to the grid that is positively charged (that repels the ions, once they are through the negatively-charged grid).
Wouldn't the ions be decelerated by the positive grid? After all, the grids can't be too close (this page mentions 1cm separation between the contacts in a 15kV vacuum circuit breaker).
The references I found mentions a different approach. Negative ions are attracted to a positively charged center. Once they arrive, they're stripped of some electrons, making them positively charged. This causes them to be repelled away from the center. This makes more sense to me as there would be no deceleration phase, from what I can figure.
Is there any reason that they couldn't just keep adding grids with varying voltages? And why are the last two voltages both low? Wouldn't it make sense to alternate them?
If you put a high-voltage grid after a low-voltage one, the ions would be repelled by it, not attracted. The voltage gradient must go in one direction: out of the thruster. I'm no scientist, but I don't think you'd gain much by adding a third couple of grids inbetween the two with a medium-voltage level. It would probably be more fruitfull to simply increase the difference between the high and low levels.
I assume the last two grids are low for the same reason the first two are high, to prevent errosion.
When I need to implement rounding, I add.5 and then truncate. I believe (perhaps naively) that this is efficient because of the lack of branching.
Where I'm comming from, the FPU is by default set to perform rounding, so to truncate, the FPU control word has to be modified, the move performed, and then the control word has to be restored. This makes truncating a LOT slower than rounding.
So giant ant overlords could only evolve on a planet with less gravity or intense pressures?
From what I've heard, the primary factor that keeps insects from growing much larger than they do here on earth, is the oxygen level. From what I remember, this is because the insects "breathe" through their skin, and as the insect increases in size, the interior grows too large to be sustained from the limited surface area.
I think it's hard for us geeks to understand why art is valued the way it is. If we have a wicked computer that works perfectly, but later find out that it's (omg) not a real AMD, but in fact some sort of replica... we say "who cares?... As long as the IO behaviour is what I wanted, that's all that matters!"
After the theft of some valuable Munch paintings here in Oslo not long ago, I had this very discussion with my gf. I argued that they should get some exceptionally good forgeries and display them to the public instead of the real deal. My argument was that since you'll need microscopes and UV light, not to mention expertise, to tell the fake from the original, the viewers would have the same experience. My gf refused to accept this, simply stating "but I'll know it's not the real deal!". Apparently "the real deal" has some intrinsic properties that I fail to sense:)
Just because they're "bytecodes" doesn't tell us whether they're interpreted or compiled.
True, however in this interview with Anders (Chief C# Language Architect), he states that "I think one of the key differences between our IL design and Java byte code specifically, is that we made the decision up-front to not have interpreters". A bit further down he says "When you make the decision up-front to favor execution of native code over interpretation, you are making a decision that strongly influences design of the IL".
Certainly you CAN interpret it, but it was designed to be JITed.
[...] if a number has two prime factors it can't have any other factors. Is this true, and is the mathematics behind it obvious or complicated?
A composite (ie non-prime) number is a product of at least two prime numbers, otherwise it would be a prime number. That follows directly from the definition of a prime number. A composite number can have more than two (different) prime factors though. Take your favorite number 42 = 2 * 3 * 7. Or if you want a 5 digit number: 11 * 23 * 127 (a Mersenne prime, btw:) = 32131. Since there's no mathematical law against which numbers you can multiply together, you can use as many prime factors you want to generate a number.
All I know is that I stopped watching TV since our old TV makes a high-pitch noise, which my parents cannot hear at all. It comes from the high voltage transformer, which operates at around 15kHz. From what I heard, when the transformer gets old, the threads in the transformers coil will have a slight slack and vibrate at that frequency, producing the noise.
I found that noise highly annoying, so you might want to start around there:)
Just for kicks, I tried overclocking my rather plain 6800GT card. I saw an almost direct linear relationship between % overclocked and % increase in framerate in F.E.A.R.
At most I managed to push it from 350 to 410Mhz (no special cooler), which is a 17% increase. The average framerate went from 41 to 48, which is a 17% increase...
The scientist quoted in the article says: "The kind of spacecraft we've talked about could move an asteroid 650 feet (200 meters) across provided we have decades of advanced warning". 650 feet?
Across. As in a 200 meter wide asteroid. I suppose the idea is that if you get out there early enough, even a small course correction can result in a significant deviation several decades later.
...for more redundant pins so a single socket design could last 5-10 years, not replaced 5 months later with one that has two pins more
Uhm, what good would that do? So you can upgrade your motherboard but keep your 10 year old CPU? Or be able to upgrade your cpu, and have your 10 year old motherboard magically have support 32 cores and whatnot that'll be down the road?
But yeah, if nothing major changes, the socket should stay the same.
OK, I'm not exactly a gun nut, but that's damn impressive..50 cal snipers are designed to take out the engine blocks of vehicles. A window stopping them is just plain cool.
Mythbusters just gave me an idea here. In the episode where they tested the "bulletproof water" myth, they showed that even those.50 cal rounds only penetrate the water a few of inches or so.
So, just put on one of them quarantine suites a couple of sizes too large, fill it up with water, and voila: a cheap, mobile, full body armor capable of withstanding a.50 cal round!
Odd, then, that NetBeans and Eclipse are still slower than a sedated elephant on my Athlon 64 3200+ with 512 MB RAM. My computer must be living in a time warp.
Can't comment on NetBeans, but Eclipse is just a tad slower than VS.Net 2003 on my machine, which matches your specs. Eclipse takes a bit longer to load (around 20 seconds after a fresh reboot), but that doesn't matter much.
If you leave the water in the cooling system too long how long before someone gets a good dose of legionaires disease from thier coolant (water) accidentally spilling on thier desk?
The top of the reserator is sealed by a rubber seal. If you simply fasten the top sufficiently, theres's no leaks. Besides, the unit comes with an anti-corrosion and anti-bacterial fluid that's to be added to the water. Think that'll stop most of it.
Do you think you could increase your bandwidth? I'm still tired of being on a 3 mbit connection and having to wait 45+ seconds to get a comment posted.
Perhaps it has something to do with the proxy (or whatever check) it performs when you post a comment. Each time you post a comment, it'll try to connect to your ip at port 80 and do a http GET. If you don't have a service running on that port, it'll probably time out before it continues. It might also be intentional to avoid DOS-like attacks.
We are talking thousands of square miles of ocean here that feed these storms. You think an iceberg and a couple of subs trolling the waters is going to affect that?
I didn't read the "crackpot" story, but I did read the SciAm article. The premise was that weather systems are chaotic systems, and chaotic systems can be very sensitive to initial conditions.
They found that to alter the course of a hurricane, you might just have to change the surface temperature of a square km or so for a few degrees C for an hour or so (I don't recall the specifics, only that they thought it was feasible). The trick was of course that it had to be a very specific location, and a very specific change in temperature, and the timing was absolutely critical. The further away from this "optimal window" you got, the more effort you had to expend trying to alter the path.
They didn't seek to make the hurricane go away, just go somewhere slightly different, like say not directly over any major cities etc.
Second- I MUST sit through 6-8 minutes of commercials before the showtime when the movie is new to get a good seat.
Move to Oslo, Norway;) We got the world largest THX (at least as of a year or two ago) theater (around 1000 seats), and for (almost) all theaters you can order (specific) seats over the internet up to 3 days in advance. This way you always know what you'er gonna get, and if you dont mind disturbing half a row, you can go in a couple of minutes into the commercials, skipping most of them.
Let's say I take a binary file and I grab both it's MD5 and SHA1 hashes. I then combine the output of those two into one really long string. Them I take the SHA1 hash of that string. How secure is this?
Afaik all attacks against MD5 and SHA1 are not "post-image" attacks. That is, the acttacker can generate two hashes with different data but with same hash, but not take existing data and generate new data with same hash.
Slashdot Mirror
Still, to say that Microsoft has been focused on security since Windows NT wasn't a good way to start out his answer. :-(
;)
They way I interpreted it was that while they focused on security since NT (after all, it did have a security model with user permissions etc), their focus was wrong and too limited. They only focused on a very small part of the puzzle, and they totally ignored other important security aspects (from secure code to "why does this service need admin privs anyway"). And they've been working on that ever since, albeit slowly one might argue
you need a set of pratt & whitney jet engines to supply sufficient power to AMD chips. Then, there's all that heat.
I run an AMD X2 3800+, an Nvidia GT6800 PCIe and three HD's (including two WD Raptors) off a 350W PSU, and I have exactly zero stability issues. Using a typical Zalman cooler, the CPU runs at about 45C under full load (two Folding@home instances). The GT6800 is miles ahead in the heating department compared to the X2.
TFA says that Apple, for example, might be charged a nickle or dime per song to make sure that the data transfers completely and quickly. Ignoring the big bad implications of the word "completely," I just dont' get it.
I could understand it if they provided an additional service. For instance, providing a local high bandwidth proxy/caching service. This could ensure that watching music videos would be a smooth experience regardless. How much it's worth however is another issue.
The technique is used in tandem accelerators. You have a grid that is negatively charged (so it attracts the ions) immediately prior to the grid that is positively charged (that repels the ions, once they are through the negatively-charged grid).
;)
Wouldn't the ions be decelerated by the positive grid? After all, the grids can't be too close (this page mentions 1cm separation between the contacts in a 15kV vacuum circuit breaker).
The references I found mentions a different approach. Negative ions are attracted to a positively charged center. Once they arrive, they're stripped of some electrons, making them positively charged. This causes them to be repelled away from the center. This makes more sense to me as there would be no deceleration phase, from what I can figure.
Then again, I'm no expert
Is there any reason that they couldn't just keep adding grids with varying voltages? And why are the last two voltages both low? Wouldn't it make sense to alternate them?
If you put a high-voltage grid after a low-voltage one, the ions would be repelled by it, not attracted. The voltage gradient must go in one direction: out of the thruster. I'm no scientist, but I don't think you'd gain much by adding a third couple of grids inbetween the two with a medium-voltage level. It would probably be more fruitfull to simply increase the difference between the high and low levels.
I assume the last two grids are low for the same reason the first two are high, to prevent errosion.
When I need to implement rounding, I add .5 and then truncate. I believe (perhaps naively) that this is efficient because of the lack of branching.
Where I'm comming from, the FPU is by default set to perform rounding, so to truncate, the FPU control word has to be modified, the move performed, and then the control word has to be restored. This makes truncating a LOT slower than rounding.
So giant ant overlords could only evolve on a planet with less gravity or intense pressures?
From what I've heard, the primary factor that keeps insects from growing much larger than they do here on earth, is the oxygen level. From what I remember, this is because the insects "breathe" through their skin, and as the insect increases in size, the interior grows too large to be sustained from the limited surface area.
I think it's hard for us geeks to understand why art is valued the way it is. If we have a wicked computer that works perfectly, but later find out that it's (omg) not a real AMD, but in fact some sort of replica... we say "who cares?... As long as the IO behaviour is what I wanted, that's all that matters!"
:)
After the theft of some valuable Munch paintings here in Oslo not long ago, I had this very discussion with my gf. I argued that they should get some exceptionally good forgeries and display them to the public instead of the real deal. My argument was that since you'll need microscopes and UV light, not to mention expertise, to tell the fake from the original, the viewers would have the same experience. My gf refused to accept this, simply stating "but I'll know it's not the real deal!". Apparently "the real deal" has some intrinsic properties that I fail to sense
Just because they're "bytecodes" doesn't tell us whether they're interpreted or compiled.
True, however in this interview with Anders (Chief C# Language Architect), he states that "I think one of the key differences between our IL design and Java byte code specifically, is that we made the decision up-front to not have interpreters". A bit further down he says "When you make the decision up-front to favor execution of native code over interpretation, you are making a decision that strongly influences design of the IL".
Certainly you CAN interpret it, but it was designed to be JITed.
[...] if a number has two prime factors it can't have any other factors. Is this true, and is the mathematics behind it obvious or complicated?
:) = 32131. Since there's no mathematical law against which numbers you can multiply together, you can use as many prime factors you want to generate a number.
A composite (ie non-prime) number is a product of at least two prime numbers, otherwise it would be a prime number. That follows directly from the definition of a prime number. A composite number can have more than two (different) prime factors though. Take your favorite number 42 = 2 * 3 * 7. Or if you want a 5 digit number: 11 * 23 * 127 (a Mersenne prime, btw
The point of highlighted has already been touched on, it can be highlighted.
Only one flash at a time. Try selecting the WHOLE article and copy it...
I want to know the frequency, so I can try this!
:)
All I know is that I stopped watching TV since our old TV makes a high-pitch noise, which my parents cannot hear at all. It comes from the high voltage transformer, which operates at around 15kHz. From what I heard, when the transformer gets old, the threads in the transformers coil will have a slight slack and vibrate at that frequency, producing the noise.
I found that noise highly annoying, so you might want to start around there
Just for kicks, I tried overclocking my rather plain 6800GT card. I saw an almost direct linear relationship between % overclocked and % increase in framerate in F.E.A.R.
At most I managed to push it from 350 to 410Mhz (no special cooler), which is a 17% increase. The average framerate went from 41 to 48, which is a 17% increase...
The scientist quoted in the article says: "The kind of spacecraft we've talked about could move an asteroid 650 feet (200 meters) across provided we have decades of advanced warning". 650 feet?
Across. As in a 200 meter wide asteroid. I suppose the idea is that if you get out there early enough, even a small course correction can result in a significant deviation several decades later.
...for more redundant pins so a single socket design could last 5-10 years, not replaced 5 months later with one that has two pins more
Uhm, what good would that do? So you can upgrade your motherboard but keep your 10 year old CPU? Or be able to upgrade your cpu, and have your 10 year old motherboard magically have support 32 cores and whatnot that'll be down the road?
But yeah, if nothing major changes, the socket should stay the same.
OK, I'm not exactly a gun nut, but that's damn impressive. .50 cal snipers are designed to take out the engine blocks of vehicles. A window stopping them is just plain cool.
.50 cal rounds only penetrate the water a few of inches or so.
.50 cal round!
Mythbusters just gave me an idea here. In the episode where they tested the "bulletproof water" myth, they showed that even those
So, just put on one of them quarantine suites a couple of sizes too large, fill it up with water, and voila: a cheap, mobile, full body armor capable of withstanding a
Odd, then, that NetBeans and Eclipse are still slower than a sedated elephant on my Athlon 64 3200+ with 512 MB RAM. My computer must be living in a time warp.
Can't comment on NetBeans, but Eclipse is just a tad slower than VS.Net 2003 on my machine, which matches your specs. Eclipse takes a bit longer to load (around 20 seconds after a fresh reboot), but that doesn't matter much.
Sounds like a weird conclusion to draw from the data they got - it sounds to me more like teenagers play less videogames as they get older.
Reminds me of this quote of some US senator: "Statistics show that teen pregnancy drops off significantly after the age of 25".
If you leave the water in the cooling system too long how long before someone gets a good dose of legionaires disease from thier coolant (water) accidentally spilling on thier desk?
The top of the reserator is sealed by a rubber seal. If you simply fasten the top sufficiently, theres's no leaks. Besides, the unit comes with an anti-corrosion and anti-bacterial fluid that's to be added to the water. Think that'll stop most of it.
Do you think you could increase your bandwidth? I'm still tired of being on a 3 mbit connection and having to wait 45+ seconds to get a comment posted.
Perhaps it has something to do with the proxy (or whatever check) it performs when you post a comment. Each time you post a comment, it'll try to connect to your ip at port 80 and do a http GET. If you don't have a service running on that port, it'll probably time out before it continues. It might also be intentional to avoid DOS-like attacks.
but does it have a simple mnemonic like: [...]
Our teacher had one which was pretty simple : It's COSy to have your boy/girlfriend laying next to you.
We are talking thousands of square miles of ocean here that feed these storms. You think an iceberg and a couple of subs trolling the waters is going to affect that?
I didn't read the "crackpot" story, but I did read the SciAm article. The premise was that weather systems are chaotic systems, and chaotic systems can be very sensitive to initial conditions.
They found that to alter the course of a hurricane, you might just have to change the surface temperature of a square km or so for a few degrees C for an hour or so (I don't recall the specifics, only that they thought it was feasible). The trick was of course that it had to be a very specific location, and a very specific change in temperature, and the timing was absolutely critical. The further away from this "optimal window" you got, the more effort you had to expend trying to alter the path.
They didn't seek to make the hurricane go away, just go somewhere slightly different, like say not directly over any major cities etc.
Second- I MUST sit through 6-8 minutes of commercials before the showtime when the movie is new to get a good seat.
;) We got the world largest THX (at least as of a year or two ago) theater (around 1000 seats), and for (almost) all theaters you can order (specific) seats over the internet up to 3 days in advance. This way you always know what you'er gonna get, and if you dont mind disturbing half a row, you can go in a couple of minutes into the commercials, skipping most of them.
Move to Oslo, Norway
Let's say I take a binary file and I grab both it's MD5 and SHA1 hashes. I then combine the output of those two into one really long string. Them I take the SHA1 hash of that string. How secure is this?
Afaik all attacks against MD5 and SHA1 are not "post-image" attacks. That is, the acttacker can generate two hashes with different data but with same hash, but not take existing data and generate new data with same hash.
I worry enough about people using replay attacks by recording the signal from my remote-unlock keychain
Hmm, I read that the keychain door openers uses a technique similar to the "password calculators", in which case a replay wouldn't get you anywhere?