Don't mess with 3phase unless you are trained!. Hell, for that matter, most people shouldn't be messing with 120V in their house...
Yes, 220 is a doubling of 110 and they are 180 degrees out of phase. Most power is NOW 240/120 because it reduces the current load on the lines.
3phase is not 3x120. the phases are 60 degrees out of phase. 3phase is often wired with five wires (including a neutral and a ground). Each phase of a 480V system is 277V wrt ground(neutral) or 480V wrt any other phase. Given the phase to phase voltage, you divide by sqrt(3) to find the phase to ground voltage (or vice versa).
BTW, in commercial applications, 120V is usually one phase from a 208V 3 phase system. So, I repeat, if it's commercial power and you're not a trained licensed electrician, Don't mess with the panel or wiring
You're right, we did build some big 'uns (>1MTon). I believe in the current stockpile we're phasing them out... (note to self, pull out old DOE info and see if I can double check that)
It was all a political ploy. We scare them. They scare us. Senseless really. It turns out we were scared of each other for the wrong reasons...
BTW, there are beneficial uses for these things. If I remember correctly, the Chinese "moved" a mountain once -- using a nuke. Cleared a nice path through the mountain range, that did. (fallout, what's that. Never heard of it.
P.S. I think a few kTons is plenty for most purposes...
The good news is we have time to work on the problem.
phew!
Re:Interesting, but I don't put much faith into it
on
The Death of A Universe
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· Score: 3, Informative
It was a good paper, at the time. Since it's publication; however, we have some fairly good evidence that the universe isn't going to slow down and compact in a "crunch" The evidence shows that the universe is actually accelerating outward. Additional evidence, seems to indicate that there isn't enough mass to reverse the acceleration. Current accepted theory is that the universe will continue to expand and thermodynamically "die"
I would propose "re-burning" the high level waste in a system in which fission is initiated by a particle accelerator. By the time the fuel is completely "burned" it would be highly radioactive, but have short (decade) half lives compared to traditional waste (10,000's years)
So, to answer your question, Yes, someone did look at the results and "Yeah, that'll do just fine" If I remember right, the weapons in our active stockpile are in the 10's kiloton range, with a few in the 100 kton range.
Unless someone has seen one of these go off (and there are damn few people alive who have) or has actually thought about it -- really thought about it, it's hard to image how big that really is. It's so big, it literally is beyond comprehension for most people.
One thing we did learn, is that there's no limit in the size you can build one of these things in. Is that useful? Probably not. (unless we have to deflect an asteroid or evil aliens or something...)
Right now, it's not likely that anyone will be able to get their hands on it.
The problem is, like with any technology, it will eventually become something that anyone with resources could make. Eventaully it will become possible for Bob to build a nuclear weapon in his back yard, because he can order all the parts and materials through online catalogs.
The U.S. does have stockpiles of chemical and biological weapons from the 40's and 50's. The U.S. Army is in the process of destroying them; but, there is still literally 1000's of tons of the stuff around in bunkers. The U.S. is bound by international treaty not to use Chemical or Biological weapons, ever, under any circumstances.
The idea is for everyone to have a (precious) few minutes to get to shelter, clear off the roads, etc. That's all. Think of it like the tornado warnings in the central part of the U.S. When the siren goes off, everyone knows it's time to head for the cellar...
Actually, I find it kind of amusing that SCO publically laid our four examples where it claims IBM "illegally" added stuff to Linux; and, IBM trots out exactly four patents SCO is infringing upon...
Think about that for a minute. Get it yet?
I bet IBM's got a whole slew of pattents it'll claim SCO infringes upon, if needed. They've just listed the four it can build a quick and completely solid case for. IBM has a massive IP inventory to fall back on -- The senior guys at IBM are thinking "Silly fools, you want to play IP games, then We'll play IP games!"
that the US government is going to pay them the license fees for each cpu running linux, they've lost their fsking minds. I know one national lab alone (and it's a small one) that would have to write a check for around $1M to cover the fees.
You charge enough to cover your expenses. Including insurance (not just life, business insurance covering liability, insurance on your equipment, etc.)
When you consider I could buy a Solarix x86, 4-cpu server license for $1500 ($375 per cpu) or a 2-cpu workgroup server license for $250 ($125 per cpu) direct from Sun.
Even if they have the right to force a license on commercial Linux users (which they don't), their pricing structure just doesn't make any sense -- it's not competitive. Hell, Windows 200x Server doesn't cost as much as their $1399/cpu price...
Sounds like you need a UPS with continuous line regulation.
In answer to your question, No. Having a UPS keeps the power supplies' supply (input) current stable; but, does nothing to prevent a bad power supply from producing bad, noisy power to the PC inards...
If you're getting spikes on your network cables due to electrical supply spikes, which are destroying your network cards, It's not a shielding issue. Put the router / switch you are using on a UPS as well. The surges are most likely getting in through there.
Slashdot Mirror
power companies are already investigating this for use to absorb peaks (troughs) in load
Some systems are using DC for transmission; I'm not sure why considering the conversion loss... Probably phasing issues or corona.
Don't mess with 3phase unless you are trained!. Hell, for that matter, most people shouldn't be messing with 120V in their house...
Yes, 220 is a doubling of 110 and they are 180 degrees out of phase. Most power is NOW 240/120 because it reduces the current load on the lines.
3phase is not 3x120. the phases are 60 degrees out of phase. 3phase is often wired with five wires (including a neutral and a ground). Each phase of a 480V system is 277V wrt ground(neutral) or 480V wrt any other phase. Given the phase to phase voltage, you divide by sqrt(3) to find the phase to ground voltage (or vice versa).
BTW, in commercial applications, 120V is usually one phase from a 208V 3 phase system. So, I repeat, if it's commercial power and you're not a trained licensed electrician, Don't mess with the panel or wiring
Ignore other comment. Damn it! I'm suffering too many brain farts for someone only 35... You are correct. I'm thinking of saphire.
That's glass. Quartz, saphire, etc made of base of Al2O3...
It was all a political ploy. We scare them. They scare us. Senseless really. It turns out we were scared of each other for the wrong reasons...
BTW, there are beneficial uses for these things. If I remember correctly, the Chinese "moved" a mountain once -- using a nuke. Cleared a nice path through the mountain range, that did. (fallout, what's that. Never heard of it. P.S. I think a few kTons is plenty for most purposes...
Haven't you heard? We're the new world Empire.
phew!
It was a good paper, at the time. Since it's publication; however, we have some fairly good evidence that the universe isn't going to slow down and compact in a "crunch" The evidence shows that the universe is actually accelerating outward. Additional evidence, seems to indicate that there isn't enough mass to reverse the acceleration. Current accepted theory is that the universe will continue to expand and thermodynamically "die"
It's called Quartz
I would propose "re-burning" the high level waste in a system in which fission is initiated by a particle accelerator. By the time the fuel is completely "burned" it would be highly radioactive, but have short (decade) half lives compared to traditional waste (10,000's years)
Note to self: Take foot out of mouth. This isn't Fission...
P.S. Not all nuclear reactions produce toxic waste...
So, to answer your question, Yes, someone did look at the results and "Yeah, that'll do just fine" If I remember right, the weapons in our active stockpile are in the 10's kiloton range, with a few in the 100 kton range.
Unless someone has seen one of these go off (and there are damn few people alive who have) or has actually thought about it -- really thought about it, it's hard to image how big that really is. It's so big, it literally is beyond comprehension for most people.
One thing we did learn, is that there's no limit in the size you can build one of these things in. Is that useful? Probably not. (unless we have to deflect an asteroid or evil aliens or something...)
The problem is, like with any technology, it will eventually become something that anyone with resources could make. Eventaully it will become possible for Bob to build a nuclear weapon in his back yard, because he can order all the parts and materials through online catalogs.
The U.S. does have stockpiles of chemical and biological weapons from the 40's and 50's. The U.S. Army is in the process of destroying them; but, there is still literally 1000's of tons of the stuff around in bunkers. The U.S. is bound by international treaty not to use Chemical or Biological weapons, ever, under any circumstances.
in a container of acetone over night. That'll clean it... Yeah, it'll be really clean then.
the article makes too many unscientific assumptions; but, if it were to happen, maybe people would stop making so many short sighted decisions.
The idea is for everyone to have a (precious) few minutes to get to shelter, clear off the roads, etc. That's all. Think of it like the tornado warnings in the central part of the U.S. When the siren goes off, everyone knows it's time to head for the cellar...
Gooood. Soon we will be bowing before our robot master! Bow before your master human!
Think about that for a minute. Get it yet?
I bet IBM's got a whole slew of pattents it'll claim SCO infringes upon, if needed. They've just listed the four it can build a quick and completely solid case for. IBM has a massive IP inventory to fall back on -- The senior guys at IBM are thinking "Silly fools, you want to play IP games, then We'll play IP games!"
You charge enough to cover your expenses. Including insurance (not just life, business insurance covering liability, insurance on your equipment, etc.)
Even if they have the right to force a license on commercial Linux users (which they don't), their pricing structure just doesn't make any sense -- it's not competitive. Hell, Windows 200x Server doesn't cost as much as their $1399/cpu price...
In answer to your question, No. Having a UPS keeps the power supplies' supply (input) current stable; but, does nothing to prevent a bad power supply from producing bad, noisy power to the PC inards...
If you're getting spikes on your network cables due to electrical supply spikes, which are destroying your network cards, It's not a shielding issue. Put the router / switch you are using on a UPS as well. The surges are most likely getting in through there.