If push comes to shove, all it takes is one executive order and a few dozen US Marshalls at the overseas cable connection points and satellite uplinks and 99% of the international traffic in the US is down for at least a few days until it gets sorted out between the companies, Congress and the White House.
First off all, nobody is going to shoot down a UAV with an RPG, unless it is hovering at very low altitude. If you got this idea from Black Hawk down, the helicopters got shot down while they were basically hovering at roof level. A small plane going a few hundred mph is impossible to hit.
The physics part comes in, because a small missile with lower mass, much higher thrust to weight ratio and much smaller control surfaces can pull much higher g's than anything with large wings. A F-16 can pull around 9G before things start coming off, this might be able to do 15, a light AA or SA missile can pull 20-50.
So yeah, it might out-turn more than a manned plane, but not a missile.
I've been hearing this and similar arguments since I started college way back in 1986 and think it's just an indicator of laziness on the professors' side. Especially in engineering or sciences, it's really easy to write tests and requirements for papers that make cheating almost impossible. But recycling the same questions and the same term papers year after year and decade after decade makes it very easy for students to cheat. And this hasn't changed materially for at least 25 years. At my university, the student government had been keeping all tests and exercises since the founding in 1969 in three ring binders, so you just walked in, paid a small fee and copied the entire semester's materials. The only difference nowadays is that you can copy and paste, so students save a few hours retyping topics or copying them by hand. And one of my professor's argument that if students copy solutions, "They have to at least read it." is completely bogus in my opinion--I've taught enough labs classes to know that you can copy stuff without retaining anything.
But updating teaching materials, varying values, or just putting in actual calculations would make it easier for students to just do it themselves rather than trying to fix apply all the changes. It does require commitment by the professors and TAs, though. And obviously, copying stuff from the smart guy in class is still the preferred way of cheating.
Unfortunately, recycling tests and term papers and then trying to catch cheaters is not only pointless, but also detrimental. One of the things I had to teach newly graduated programmers for 15 years now is NOT to reinvent the wheel all the time. They are so conditioned not to copy anything that they not only search the internet for already existing code, some are even reluctant to use standard libraries. Obviously, this is not just a complete waste of company time, it also introduces hundreds or thousands of bugs, inferior implementations, and highly unmaintainable code. Libraries and other peoples' code (TM) are not perfect, but in most cases, it's good enough and better than what you hack up on your own with less than a couple of years of production coding under your belt.
So seriously academia, just stop whining, get off your butt and work on writing good tests instead of recycled assignments that facilitate copying and pasting.
Just as background, I run software planning for a $3bln+ company....
What on earth is "reverse the polarity of a swimming pool" supposed to mean? That can't be explained by sloppy editing or a less than tenuous grasp on physics anymore.
Actually, if you would have read past that point, you'd have seen that the process is actually very rigorously defined. It's when whatever particle you use to observe the system interacts with the system. So if you bounce a photon of an electron, that's the observation, not when the photon comes back to hit the photo receptor. The problem is that this rigorous definition is way past what you want to go into in a beginners guide. A good place to start is looking up quantum decoherence. But the short version is that without an observation, all quantum states are superimposed and we don't know which one the particle or system is in. To get this information, we need to probe it, and since all the possible probes we have are other elementary particles, there is going to be some interaction and the system drops into an Eigenstate with the energy or momentum you wanted to observe (obviously not at the same time, see the uncertainty principle.
In your example, the bat doesn't observe the system directly, the "observation" happens when the photon that hit the bat's eye bounced off whatever it bounced off to get there. Or when the sonar pulse sent by the bat hit whatever it bounced off off.
(and yeah, I know this is so not mathematically rigorous, or correct to the 10th order)
Nice polemic, and echoed widely. On the other hand, California leads the entire US by "value added by manufacturing" and on its own dwarfs the entirety of the Southern states the authors hold up as an example. For example, according to the US Census Bureau, California created $254bln in added manufacturing value with 1.3 million workers in 2008, South Carolina: $37bln with 230000 workers. If you crunch the numbers, you'll also see that California produces more value per worker than most other states. And until the meltdown last year, one of the primary car factories in the US was Nuumi in Fremont, CA, actually the Toyota plant Tesla bought.
Yes, once prices come down and everyone can do it, it'll probably electric car manufacturing will probably move to other states and California will get started on the next thing. But to get this off the ground initially, Silicon Valley is a great spot, because all the expertise you need to debug the process is within a two hour drive.
And by the way, Porsche, Mercedes, Audi, and BMW main factories are in Germany's most expensive areas, very few are in the more depressed parts (although Wolfsburg is really depressing).
So, IRTFOPMA (I Read The Fine Original PLoS Med Article), and it seems the problem is going to solve itself. According to this graph, we'll run out of Republicans if health reform doesn't get passed.
I am basically going to quit the industry and open up an Italian restaurant.
I have no intention of participating in a field that is seething with greed and sowing the seeds of its own darkness.
Weirdly, this article about saline face modification in Bizarre magazine. Makes me want to reread Neuromancer and Johnny Mnemonic (but definitely not watch the movie again)
Germany: won. We destroyed the army, roughed up the citizens for being a bunch of nasty losers, and then set about making them BFFs.
I don't remember that the US carpet bombed every large North Vietnamese city. Even Rolling Thunder had lots of restrictions what the USAF, Navy and Marines could hit.
Wow, bad astronomy indeed. For the odds of a meteorite striking one of many airplanes, the speed of the airplane is pretty much irrelevant. His calculation is sort-of correct(ish) for a single airplane and a single meteorite. But since we have thousands of airplanes and hundreds (or thousands)of meteorites in the atmosphere at any point in time, it evens out to the relative surface area of all planes.
A simple picture of it: all planes fly in a shell around the earth between 10000 and 13000 meters, all meteorites that don't break up in the upper atmosphere go through that shell. So the ones in the fraction covered by the combined surface area of planes hit planes. Strictly speaking, it would be the fraction of volumes in a shell that's as thick as the average plane is high, but would actually increase with slower meteorites, not decrease.
Yes, I was also disappointed that they use bioelectricity as a euphemism for "burning crops in a power plant". Wiring together a huge field of cucumbers stuffed with zinc and copper disks would have been so much cooler.
I mean MLB even outlawed aluminum bats. So now they are going to allow Seattle to use lasers and stuff? And why only against Pittsburgh? They aren't even in the same league.
Apart from the abysmal track record of the BAA, here are a number of reasons why it won't work.
-Demand at airports is not smooth. Imagine two 747 and one 380 arriving simultaneously. There is no way to get 1200 passengers smoothly into individual pods. And if you want them to use credit cards, walking out a fire door, getting arrested by airport police, 3 hours of interrogation and getting taken to your departure gate in handcuffs will get you on your next plane faster. For added hilarity, add a few wheelchairs to the mix.
-Ripple effects...if any of the pods breaks down, traffic stops. Even if they had the same MTBF as trains, the system will break 500 times more often. By the way, trains are a well understood technology after 150 years, this isn't.
-Goofing off. It doesn't have to be vandalism, but will the pods work with 25 college students packed into one?
Well, I am waiting for some consumer features, and I don't see many things OS X does wrong--or XP for that matter. Obviously Office 2007 is a different story, because it took a few big steps back in usability.
OK, here are some wishes:
-right click on any text in any application for Google search. (on OS X, you can drag to the Safari icon, but that's disruptive) -Full sized cover flow -RAW support at the OS level -Smart text parsing. The OS should know that xxxx@yyyy.zzz is an email. Mail does something like this, but I don't use it for other reasons. -Real transparent server file systems. No, XP/Vista/OS X/Linux do not have this. -And specifically for the Mac, although this can be considered user experience: Someone please let me lock the wireless to a network instead of scanning all 55 open networks in my building every single time it gets out of standby.
And there are features like Time Machine that I didn't know I needed until I started using them.
Many of NASA's long-running missions rely on antiquated systems -- the Voyager probes each have about 32k of memory -- but the scientists say they can manage."
It would be nice if the submitter would add a proposed remedy, like simply sending a service probe out to add some more RAM.
Oh, wait.
Well, I guess when they send a space probe out into the furthest reaches of the solar system, most scientists would expect that they will have to deal with whatever hardware was on board at the time of the launch for the duration of the mission.
Slashdot Mirror
If push comes to shove, all it takes is one executive order and a few dozen US Marshalls at the overseas cable connection points and satellite uplinks and 99% of the international traffic in the US is down for at least a few days until it gets sorted out between the companies, Congress and the White House.
Physics!
First off all, nobody is going to shoot down a UAV with an RPG, unless it is hovering at very low altitude. If you got this idea from Black Hawk down, the helicopters got shot down while they were basically hovering at roof level. A small plane going a few hundred mph is impossible to hit.
The physics part comes in, because a small missile with lower mass, much higher thrust to weight ratio and much smaller control surfaces can pull much higher g's than anything with large wings. A F-16 can pull around 9G before things start coming off, this might be able to do 15, a light AA or SA missile can pull 20-50.
So yeah, it might out-turn more than a manned plane, but not a missile.
I've been hearing this and similar arguments since I started college way back in 1986 and think it's just an indicator of laziness on the professors' side. Especially in engineering or sciences, it's really easy to write tests and requirements for papers that make cheating almost impossible. But recycling the same questions and the same term papers year after year and decade after decade makes it very easy for students to cheat. And this hasn't changed materially for at least 25 years. At my university, the student government had been keeping all tests and exercises since the founding in 1969 in three ring binders, so you just walked in, paid a small fee and copied the entire semester's materials. The only difference nowadays is that you can copy and paste, so students save a few hours retyping topics or copying them by hand. And one of my professor's argument that if students copy solutions, "They have to at least read it." is completely bogus in my opinion--I've taught enough labs classes to know that you can copy stuff without retaining anything.
But updating teaching materials, varying values, or just putting in actual calculations would make it easier for students to just do it themselves rather than trying to fix apply all the changes. It does require commitment by the professors and TAs, though. And obviously, copying stuff from the smart guy in class is still the preferred way of cheating.
Unfortunately, recycling tests and term papers and then trying to catch cheaters is not only pointless, but also detrimental. One of the things I had to teach newly graduated programmers for 15 years now is NOT to reinvent the wheel all the time. They are so conditioned not to copy anything that they not only search the internet for already existing code, some are even reluctant to use standard libraries. Obviously, this is not just a complete waste of company time, it also introduces hundreds or thousands of bugs, inferior implementations, and highly unmaintainable code. Libraries and other peoples' code (TM) are not perfect, but in most cases, it's good enough and better than what you hack up on your own with less than a couple of years of production coding under your belt.
So seriously academia, just stop whining, get off your butt and work on writing good tests instead of recycled assignments that facilitate copying and pasting.
Just as background, I run software planning for a $3bln+ company....
What on earth is "reverse the polarity of a swimming pool" supposed to mean? That can't be explained by sloppy editing or a less than tenuous grasp on physics anymore.
Actually, if you would have read past that point, you'd have seen that the process is actually very rigorously defined. It's when whatever particle you use to observe the system interacts with the system. So if you bounce a photon of an electron, that's the observation, not when the photon comes back to hit the photo receptor.
The problem is that this rigorous definition is way past what you want to go into in a beginners guide. A good place to start is looking up quantum decoherence. But the short version is that without an observation, all quantum states are superimposed and we don't know which one the particle or system is in. To get this information, we need to probe it, and since all the possible probes we have are other elementary particles, there is going to be some interaction and the system drops into an Eigenstate with the energy or momentum you wanted to observe (obviously not at the same time, see the uncertainty principle.
In your example, the bat doesn't observe the system directly, the "observation" happens when the photon that hit the bat's eye bounced off whatever it bounced off to get there. Or when the sonar pulse sent by the bat hit whatever it bounced off off.
(and yeah, I know this is so not mathematically rigorous, or correct to the 10th order)
Nice polemic, and echoed widely. On the other hand, California leads the entire US by "value added by manufacturing" and on its own dwarfs the entirety of the Southern states the authors hold up as an example. For example, according to the US Census Bureau, California created $254bln in added manufacturing value with 1.3 million workers in 2008, South Carolina: $37bln with 230000 workers. If you crunch the numbers, you'll also see that California produces more value per worker than most other states. And until the meltdown last year, one of the primary car factories in the US was Nuumi in Fremont, CA, actually the Toyota plant Tesla bought.
Yes, once prices come down and everyone can do it, it'll probably electric car manufacturing will probably move to other states and California will get started on the next thing. But to get this off the ground initially, Silicon Valley is a great spot, because all the expertise you need to debug the process is within a two hour drive.
And by the way, Porsche, Mercedes, Audi, and BMW main factories are in Germany's most expensive areas, very few are in the more depressed parts (although Wolfsburg is really depressing).
2nd World? My iPhone worked better in the Masai Mara National Park in Kenya than here in San Francisco.
So, IRTFOPMA (I Read The Fine Original PLoS Med Article), and it seems the problem is going to solve itself. According to this graph, we'll run out of Republicans if health reform doesn't get passed.
I am basically going to quit the industry and open up an Italian restaurant.
I have no intention of participating in a field that is seething with greed and sowing the seeds of its own darkness.
Bada Bing
Weirdly, this article about saline face modification in Bizarre magazine. Makes me want to reread Neuromancer and Johnny Mnemonic (but definitely not watch the movie again)
Germany: won. We destroyed the army, roughed up the citizens for being a bunch of nasty losers, and then set about making them BFFs.
I don't remember that the US carpet bombed every large North Vietnamese city. Even Rolling Thunder had lots of restrictions what the USAF, Navy and Marines could hit.
Wow, bad astronomy indeed. For the odds of a meteorite striking one of many airplanes, the speed of the airplane is pretty much irrelevant. His calculation is sort-of correct(ish) for a single airplane and a single meteorite. But since we have thousands of airplanes and hundreds (or thousands)of meteorites in the atmosphere at any point in time, it evens out to the relative surface area of all planes.
A simple picture of it: all planes fly in a shell around the earth between 10000 and 13000 meters, all meteorites that don't break up in the upper atmosphere go through that shell. So the ones in the fraction covered by the combined surface area of planes hit planes. Strictly speaking, it would be the fraction of volumes in a shell that's as thick as the average plane is high, but would actually increase with slower meteorites, not decrease.
I hope the "Buy American" guy with his Hummer never walks into a Walmart. He might have a coronary.
Yes, I was also disappointed that they use bioelectricity as a euphemism for "burning crops in a power plant". Wiring together a huge field of cucumbers stuffed with zinc and copper disks would have been so much cooler.
It would most likely be bright white, like titanium dioxide.
Star Wars makes so much more sense now.
When Deep Blue went up against Kasperov, who could it practice against? Nobody.
That this got modded Insightful is the best argument yet for adding tags to /.
...calculations to come up with "Oh, I'll bet you do, you Canadian ponch."?
--------
stupid subject character limit
I mean MLB even outlawed aluminum bats. So now they are going to allow Seattle to use lasers and stuff? And why only against Pittsburgh? They aren't even in the same league.
AWESOME!!!!
step 4: add a wireless satellite uplink
Apart from the abysmal track record of the BAA, here are a number of reasons why it won't work.
-Demand at airports is not smooth. Imagine two 747 and one 380 arriving simultaneously. There is no way to get 1200 passengers smoothly into individual pods. And if you want them to use credit cards, walking out a fire door, getting arrested by airport police, 3 hours of interrogation and getting taken to your departure gate in handcuffs will get you on your next plane faster. For added hilarity, add a few wheelchairs to the mix.
-Ripple effects...if any of the pods breaks down, traffic stops. Even if they had the same MTBF as trains, the system will break 500 times more often. By the way, trains are a well understood technology after 150 years, this isn't.
-Goofing off. It doesn't have to be vandalism, but will the pods work with 25 college students packed into one?
Oh the delicious irony of using "Heathrow" and "rapid transit" in the same sentence.
Well, I am waiting for some consumer features, and I don't see many things OS X does wrong--or XP for that matter. Obviously Office 2007 is a different story, because it took a few big steps back in usability.
OK, here are some wishes:
-right click on any text in any application for Google search. (on OS X, you can drag to the Safari icon, but that's disruptive)
-Full sized cover flow
-RAW support at the OS level
-Smart text parsing. The OS should know that xxxx@yyyy.zzz is an email. Mail does something like this, but I don't use it for other reasons.
-Real transparent server file systems. No, XP/Vista/OS X/Linux do not have this.
-And specifically for the Mac, although this can be considered user experience: Someone please let me lock the wireless to a network instead of scanning all 55 open networks in my building every single time it gets out of standby.
And there are features like Time Machine that I didn't know I needed until I started using them.
Many of NASA's long-running missions rely on antiquated systems -- the Voyager probes each have about 32k of memory -- but the scientists say they can manage."
It would be nice if the submitter would add a proposed remedy, like simply sending a service probe out to add some more RAM.
Oh, wait.
Well, I guess when they send a space probe out into the furthest reaches of the solar system, most scientists would expect that they will have to deal with whatever hardware was on board at the time of the launch for the duration of the mission.
...with the only speed bump being the Slashdot editing process. Seriously, this was in every newspaper PRINT edition before it showed up on Slashdot.