Hah! Their "advanced GPS jammers" worked just fine. It was the Iraqi's... shall we say... idiotic approach to deploying them that caused them to not work as intended.
And with a lot of smart weapons once you get their trajectory tuned a bit, they can go the rest of their way on their own.
Many new weapon systems currently deployed or being staged for deployment are many years advanced, even decades, compared to other nations that it begs to question.
Wrong. Look at the Chinese. They are putting things together that are designed to counter US stuff. The Russians and French are even better examples. They both design and manufacture weapon systems that are made specifically to counter US weapons and defenses. Then they sell those things to anyone that wants them.
It only makes sense to try and make your soldiers more likely to come home and fight again.
I for one would rather be so far ahead that people don't want to challenge us, rather than get into a conflict and realize that our systems are not effective.
If you look at it from an engineering point of view, rail guns offer a simpler system that is more easily maintained. You don't have to worry so much about your ship's explosive ordnance being hit and destroying your ship as your armory blows up. The thing will fire metal slugs. There is no worry of static discharges setting off your explosives, no worry about the chemicals in your explosives breaking down, no need to fret over whether or not the materials you are using in your ammunition are toxic or cancerous to your crew, and so on.
You make things simpler and it increases the reliability, decrease the cost (usually), and increase the usability.
Also, if an agency's job is to protect the United States, they're not going to want to do that with sticks and bad words. They're going to want the best and greatest hardware, so that more of the enemy is killed and more of your friends come home.
Well... there are pretty large reaction forces on the control surfaces during ascent. If they're going mechanical linkages only, then I can't see the thing flying very often without a lot of analysis done on those cables (or whatever they'd use). Small aircraft control surfaces can be hard to get an input to if you are going to fast. You need some assistance like hydraulics or servoactuators for something that breifly experiences large loads on the control surfaces (as during ascent).
It's also hard to do attitude control thrusters without some sort of black box in there delegating thrust commands to the appropriate thrusters.
If they're going for reliability/maintainability, then they've got some electronics on there. There are just too many things that can go wrong by letting the pilot get overloaded with tasks.
They are.
You'll just need what basically amounts to a digital receiver. In other words, the signal still comes in as analog, but your digital receiver picks out the minute voltage changes in the analog signal that correspond to the digital signal.
If they did as much modelling and simulation of the craft's dynamics, then tumbling shouldn't be a problem.
My guesstimated answer as to why it tumbled is that it was one of two things:
1) an issue in the flight control software
2) someone didn't do the dynamic modelling correctly
Believe it or not, both are VERY common occurences in aerospace. Flight control software issues come up all the time; just like any other software there are bugs. The programming approach taken tends to minimize the bugs, but they still happen. And even if the software is 100% good, there is still a good chance that whoever made the mathematical models that the software uses didn't do as thorough a job as they thought. Usually that means they either didn't look at all the non-linearities, or they didn't trim the model at the appropriate conditions prior to simulation.
But getting out of a tumble with cold gas thrusters is not hard, given your flight software works and you have sufficient fuel on board. You can generally use the very things you worried about as reasons that it's hard to control tumble (precession being one), to your advantage. It's a matter of orienting yourcraft so that as you precess, the precession takes place along the axis that you have the least control over.
Hah!
If you've ever dealt with the US government, you'd know that you'd NOT want them running your healthcare!
Case in point: last friday I was supposed to receive a direct deposit from the government for my salary.
I never got paid.
The reason? For some unknown reason the routing number was switched to something completely different. My bank is Wells Fargo (I live on the west coast of the US), and my direct deposits have gone to my account just fine for as long as I've worked for the government. But this last Friday, my direct deposit got direct deposited to some bank in BOSTON.
Yes. You read that correctly, BOSTON.
The government has NO CLUE how, or why the routing number got switched to something else. Supposedly once you fill out the direct deposit form, it stays that way in the computer system. And no, the routing numbers weren't even CLOSE. The routing numbers on the east coast start low and they get higher as you move west. There is a huge difference from 1250 to 0110.
And you want me to trust the government with my healthcare? The same government that will fix your problem but take at least a month when they say a day? (Or they say a week and they mean a year?)
If that's the case, can I assist you with some financial planning services?
I am pretty sure it has some cold gas thrusters. The nozzles are probably scattered around the craft, and they don't have to be very big at all. The gas used is probably compressed air or N2 (essentially compressed air), which would keep with the craft's environmental "friendliness".
As an example, the AV8B Harrier (marine version) and the british version of the Harrier both use cold gas thrusters for attitude control. But you can't really see the nozzles until you get real close.;)
I can't see a Klingon having the patience to program. Nor do I see one having the patience to build a spacecraft.
"GACK AHWWQS!!" (F'ing CHEM HOMEWORK!!)
Just imagine a date coming into your place...
on
Big Bang of Convergence
·
· Score: 3, Funny
You turn on the TV to watch a movie...
"Problems down there? TRY CIALIS!"
Or you go to the kitchen to get something to drink...
"We've got the largest selection of dolls!"
Like I'd want any of my appliances trying to sell me penis enlargement pills.
The shorter reaction times required of a boxer require shorter muscle fibers. Endurance-type training requires longer muscle fibers that are more efficient at repetitive tasks (spread the work over the entire fiber).
There is also the fact that you train your mind and body differently when boxing versus weight lifting. Weight lifting requires a one-time explosion. Boxing requires an explosion, then retraction as fast as possible. In boxing you imagine yourself landing a blow and following through, but rarely do you imagining yourself stopping after you've followed through. Same with most martial arts.
In weightlifting you tend to put all your visualization into getting the weight up just the once. This is the same for some of the punches and kicks in martial arts.
Oh and back to the muscle fiber thing...
Endurance athletes tend to have very long muscle fibers compared to sprinters and weightlifters. Endurance athletes' muscles are literally longer and less bulky than their less efficient counterparts.
But why would you go out and buy a fancy-pants Opteron and not get it to its full potential?
That's like buying a Ferarri and putting a three-speed automatic transmission in the thing. It works, but you're not really ever using the full potential of your engine. Unless of course, you have a funky three speed automatic that can handle the horsepower, torque, and still work over the published speed range of your Ferarri.
It's also like putting together a parallel cluster of superfast machines, but you only use 10 Mbps ethernet to connect the machines. Why do it that way?
You'd need to know the material properties of the material involved with the quake. Since you can't be right at the fault, several miles down when the quake (or slippage) occurs, you have a really hard time saying exactly what is down there. You can make guesses based on previous seismic data, or samples taken from the surrounding rock, but you need to sample many times.
The other thing is that the radio waves may be so low in frequency that they are smothered by the local noise, the thermal noise in your measuring equipment, or gamma rays that plow through the earth.
I can't see how someone could measure such RF without a huge database of known signals.
If you've lived in Seattle, you know that the entire state is a major earthquake zone. I live in Southern California now (lancaster), but I had some fun in the last few major quakes we had there. It's common knowledge up there that the beautiful Cascade Mountains are almost all active volcanos, the rivers flood annually, the windstorms are irritating, and the earthquakes are generally in the range of 3-4.5 if you can feel them.
The geologists up there keep saying that Washington State is due for a huge magnitude quake, something on the order of 8.0. There are also fault lines crisscrossing the Seattle area, Puget Sound, and the outlying areas.
BTW, I read somewhere that a researcher had derived a quake prediction scheme based on seismic data. The scheme has been very accurate so far, but I can't for the life of me remember where I read it. I think it was Scientific American. But the guy predicts a 6.0+ quake in Mojave this fall.
ALL Russian made space components are specified to be sealed and have 1 atmosphere of pressure inside them. Don't ask me why. It's how the Russians do things.
That's one reason. Another is that it's easier to just use air as your working fluid since it's readily available. And air cooling systems are pretty cheap over the longer term.;)
The energy from the anti-particle interacting with any matter in the black hole goes to increasing the entropy of the black hole. That's why what hawking theorized (and still works on) is called black hole entropy. Before Hawking no one thought a black hole should have entropy. But he showed how it is possible.
The black hole radiation happens exactly as you describe.
The process that you alluded to where the surface area of a black hole behaves like entropy is sort of true. The fact is, there is a direct relation to how much information that can be stored in a volume and the surface area of the volume. If you think in terms of entropy as information degradation, then the smallest unit of information equals the smallest unit of volume, which also equates to the smallest unit of entropy.
To a good extent, materials scientists have an idea of how a material will behave.
The problem is, to REALLY understand what is going on, you have to do a quantum mechanical model of the molecules. Not just how the molecule will look, but how the electrons are arranged, all of the vibrational modes of the molecule work, and what happens when parts of the molecule are modified.
For the most part, we can currently do this. However, it is not a precise science because of the fact that no quantum mechanical model has been solved for anything larger than a hydrogen atom. Those pesky equations are just too hard to solve accurately enough to predict what is going on with any degree of certainty.
Even given enough time and computing power, it is hard to say that a quantum statistical model of a molecule will be accurate enough to fully predict the behavior. The equations are so complex that there is no known way of solving them yet.
BUT! We still get by pretty good with what we know how to do.
I was responding to the parent's:
dont know about the space shuttle, but planes are designed to last a long time and 20 years is reasonable. There havnt been any accidents because of old equipment
Check out the FAA or NTSB websites to determine the cause of airplane accidents. Some of them actually were because of worn out parts!
Probably one of the more famous ones was an Alaska Airlines flight that crashed in the pacific off the coast of oregon. A worn out worm gear in the rudder actuator was the cause. The gear wore out in part due to poor maintenance.
The thing is that the 'war on drugs', as well as the vast majority of the proposed (or extant) legislative mechanisms for addressing drug use (or abuse) are far *worse* than the drug problem itself.
You obviously never grew up in an American city. Drugs are rampant. Several of my classmates died due to drug overdose. Drugs are laughably easy to get.
Slashdot Mirror
Hah! Their "advanced GPS jammers" worked just fine. It was the Iraqi's... shall we say... idiotic approach to deploying them that caused them to not work as intended.
And with a lot of smart weapons once you get their trajectory tuned a bit, they can go the rest of their way on their own.
They get goats (or sheep, take your pick) instead silly!
Many new weapon systems currently deployed or being staged for deployment are many years advanced, even decades, compared to other nations that it begs to question.
Wrong. Look at the Chinese. They are putting things together that are designed to counter US stuff. The Russians and French are even better examples. They both design and manufacture weapon systems that are made specifically to counter US weapons and defenses. Then they sell those things to anyone that wants them.
It only makes sense to try and make your soldiers more likely to come home and fight again.
I for one would rather be so far ahead that people don't want to challenge us, rather than get into a conflict and realize that our systems are not effective.
If you look at it from an engineering point of view, rail guns offer a simpler system that is more easily maintained. You don't have to worry so much about your ship's explosive ordnance being hit and destroying your ship as your armory blows up. The thing will fire metal slugs. There is no worry of static discharges setting off your explosives, no worry about the chemicals in your explosives breaking down, no need to fret over whether or not the materials you are using in your ammunition are toxic or cancerous to your crew, and so on.
You make things simpler and it increases the reliability, decrease the cost (usually), and increase the usability.
Also, if an agency's job is to protect the United States, they're not going to want to do that with sticks and bad words. They're going to want the best and greatest hardware, so that more of the enemy is killed and more of your friends come home.
Well... there are pretty large reaction forces on the control surfaces during ascent. If they're going mechanical linkages only, then I can't see the thing flying very often without a lot of analysis done on those cables (or whatever they'd use). Small aircraft control surfaces can be hard to get an input to if you are going to fast. You need some assistance like hydraulics or servoactuators for something that breifly experiences large loads on the control surfaces (as during ascent).
It's also hard to do attitude control thrusters without some sort of black box in there delegating thrust commands to the appropriate thrusters.
If they're going for reliability/maintainability, then they've got some electronics on there. There are just too many things that can go wrong by letting the pilot get overloaded with tasks.
They are.
;)
You'll just need what basically amounts to a digital receiver. In other words, the signal still comes in as analog, but your digital receiver picks out the minute voltage changes in the analog signal that correspond to the digital signal.
There is no such thing as a digital antenna.
If they did as much modelling and simulation of the craft's dynamics, then tumbling shouldn't be a problem.
My guesstimated answer as to why it tumbled is that it was one of two things:
1) an issue in the flight control software
2) someone didn't do the dynamic modelling correctly
Believe it or not, both are VERY common occurences in aerospace. Flight control software issues come up all the time; just like any other software there are bugs. The programming approach taken tends to minimize the bugs, but they still happen. And even if the software is 100% good, there is still a good chance that whoever made the mathematical models that the software uses didn't do as thorough a job as they thought. Usually that means they either didn't look at all the non-linearities, or they didn't trim the model at the appropriate conditions prior to simulation.
But getting out of a tumble with cold gas thrusters is not hard, given your flight software works and you have sufficient fuel on board. You can generally use the very things you worried about as reasons that it's hard to control tumble (precession being one), to your advantage. It's a matter of orienting yourcraft so that as you precess, the precession takes place along the axis that you have the least control over.
Hah!
If you've ever dealt with the US government, you'd know that you'd NOT want them running your healthcare!
Case in point: last friday I was supposed to receive a direct deposit from the government for my salary.
I never got paid.
The reason? For some unknown reason the routing number was switched to something completely different. My bank is Wells Fargo (I live on the west coast of the US), and my direct deposits have gone to my account just fine for as long as I've worked for the government. But this last Friday, my direct deposit got direct deposited to some bank in BOSTON.
Yes. You read that correctly, BOSTON.
The government has NO CLUE how, or why the routing number got switched to something else. Supposedly once you fill out the direct deposit form, it stays that way in the computer system. And no, the routing numbers weren't even CLOSE. The routing numbers on the east coast start low and they get higher as you move west. There is a huge difference from 1250 to 0110.
And you want me to trust the government with my healthcare? The same government that will fix your problem but take at least a month when they say a day? (Or they say a week and they mean a year?)
If that's the case, can I assist you with some financial planning services?
I'd like to take this bill to those senators that support the DCMA and say one thing:
Suck it bitches! Suck it good! You like that?
But that's just me.
I am pretty sure it has some cold gas thrusters. The nozzles are probably scattered around the craft, and they don't have to be very big at all. The gas used is probably compressed air or N2 (essentially compressed air), which would keep with the craft's environmental "friendliness".
;)
As an example, the AV8B Harrier (marine version) and the british version of the Harrier both use cold gas thrusters for attitude control. But you can't really see the nozzles until you get real close.
I can't see a Klingon having the patience to program. Nor do I see one having the patience to build a spacecraft.
"GACK AHWWQS!!" (F'ing CHEM HOMEWORK!!)
You turn on the TV to watch a movie...
"Problems down there? TRY CIALIS!"
Or you go to the kitchen to get something to drink...
"We've got the largest selection of dolls!"
Like I'd want any of my appliances trying to sell me penis enlargement pills.
The muscle fibers are actually different.
The shorter reaction times required of a boxer require shorter muscle fibers. Endurance-type training requires longer muscle fibers that are more efficient at repetitive tasks (spread the work over the entire fiber).
There is also the fact that you train your mind and body differently when boxing versus weight lifting. Weight lifting requires a one-time explosion. Boxing requires an explosion, then retraction as fast as possible. In boxing you imagine yourself landing a blow and following through, but rarely do you imagining yourself stopping after you've followed through. Same with most martial arts.
In weightlifting you tend to put all your visualization into getting the weight up just the once. This is the same for some of the punches and kicks in martial arts.
Oh and back to the muscle fiber thing...
Endurance athletes tend to have very long muscle fibers compared to sprinters and weightlifters. Endurance athletes' muscles are literally longer and less bulky than their less efficient counterparts.
But why would you go out and buy a fancy-pants Opteron and not get it to its full potential?
That's like buying a Ferarri and putting a three-speed automatic transmission in the thing. It works, but you're not really ever using the full potential of your engine. Unless of course, you have a funky three speed automatic that can handle the horsepower, torque, and still work over the published speed range of your Ferarri.
It's also like putting together a parallel cluster of superfast machines, but you only use 10 Mbps ethernet to connect the machines. Why do it that way?
All true. :)
I'm finding that eastern california (at least the Mojave desert) is a lot like eastern washington. Except maybe about 5 degrees hotter.
You'd need to know the material properties of the material involved with the quake. Since you can't be right at the fault, several miles down when the quake (or slippage) occurs, you have a really hard time saying exactly what is down there. You can make guesses based on previous seismic data, or samples taken from the surrounding rock, but you need to sample many times.
The other thing is that the radio waves may be so low in frequency that they are smothered by the local noise, the thermal noise in your measuring equipment, or gamma rays that plow through the earth.
I can't see how someone could measure such RF without a huge database of known signals.
If you've lived in Seattle, you know that the entire state is a major earthquake zone. I live in Southern California now (lancaster), but I had some fun in the last few major quakes we had there. It's common knowledge up there that the beautiful Cascade Mountains are almost all active volcanos, the rivers flood annually, the windstorms are irritating, and the earthquakes are generally in the range of 3-4.5 if you can feel them.
The geologists up there keep saying that Washington State is due for a huge magnitude quake, something on the order of 8.0. There are also fault lines crisscrossing the Seattle area, Puget Sound, and the outlying areas.
BTW, I read somewhere that a researcher had derived a quake prediction scheme based on seismic data. The scheme has been very accurate so far, but I can't for the life of me remember where I read it. I think it was Scientific American. But the guy predicts a 6.0+ quake in Mojave this fall.
ALL Russian made space components are specified to be sealed and have 1 atmosphere of pressure inside them. Don't ask me why. It's how the Russians do things.
That's one reason. Another is that it's easier to just use air as your working fluid since it's readily available. And air cooling systems are pretty cheap over the longer term. ;)
The energy from the anti-particle interacting with any matter in the black hole goes to increasing the entropy of the black hole. That's why what hawking theorized (and still works on) is called black hole entropy. Before Hawking no one thought a black hole should have entropy. But he showed how it is possible.
The black hole radiation happens exactly as you describe.
The process that you alluded to where the surface area of a black hole behaves like entropy is sort of true. The fact is, there is a direct relation to how much information that can be stored in a volume and the surface area of the volume. If you think in terms of entropy as information degradation, then the smallest unit of information equals the smallest unit of volume, which also equates to the smallest unit of entropy.
What an idiot...
$50 ipod DIY batteries
The same link that appears several times below...
To a good extent, materials scientists have an idea of how a material will behave.
The problem is, to REALLY understand what is going on, you have to do a quantum mechanical model of the molecules. Not just how the molecule will look, but how the electrons are arranged, all of the vibrational modes of the molecule work, and what happens when parts of the molecule are modified.
For the most part, we can currently do this. However, it is not a precise science because of the fact that no quantum mechanical model has been solved for anything larger than a hydrogen atom. Those pesky equations are just too hard to solve accurately enough to predict what is going on with any degree of certainty.
Even given enough time and computing power, it is hard to say that a quantum statistical model of a molecule will be accurate enough to fully predict the behavior. The equations are so complex that there is no known way of solving them yet.
BUT! We still get by pretty good with what we know how to do.
Well, DUH!
I was responding to the parent's:
dont know about the space shuttle, but planes are designed to last a long time and 20 years is reasonable. There havnt been any accidents because of old equipment
Check out the FAA or NTSB websites to determine the cause of airplane accidents. Some of them actually were because of worn out parts!
Probably one of the more famous ones was an Alaska Airlines flight that crashed in the pacific off the coast of oregon. A worn out worm gear in the rudder actuator was the cause. The gear wore out in part due to poor maintenance.
The thing is that the 'war on drugs', as well as the vast majority of the proposed (or extant) legislative mechanisms for addressing drug use (or abuse) are far *worse* than the drug problem itself.
You obviously never grew up in an American city. Drugs are rampant. Several of my classmates died due to drug overdose. Drugs are laughably easy to get.