If there have been any deaths due to strong constant magnetic fields it has probably been related to some classified project.
I would have three major concerns if I were working with very stong magnetic fields.
1) Are the fields in question constant fields. changing fields generate electrical currents when they cross anything that conducts electricity. (like humans, but wire works better)
2) where does the energy go if the field accedentally fails. Power failures, shorting out the power supply outputs, dialectiric failures. Can cause huge power surges.
3) Pregnant people and children. Could mess with growth and develpoment. (vaugely remember something about this somewhere.}
I would guess that a rapidly changing magnetic field could be used as a murder weapon. The medical examiner would be very confused at first. However you might need millons of dollars of equipment that would not be portable. Also the electric company would know the exact time of death from the power consumption charts
One of my Physics profs in college worked on prototype cyclotrons in the 50's. He told us about a power supply failure (something metal got across the power supply outlets IIRC) He did not feel anything, but there was a bang followed by a crash. A picture hung near the coils had the wire that held it up melted. It then fell to the floor. Check your spare change and dental fillings at the door !
This is very different from the ping pong ball case.
In the floating ping pong ball case. The ball is being lifted (its flying) based on an external force. If you were in the ball you would experience the same sort of sensations you would in a an air plane (of course due to the size of the ball it would be like flying coach;)
You can rent time in silo shaped wind tunnels (mounted vertically) and fly like the ping pong balls. Very windy of course and noisy.
These bridges are being supported almost on a atom by atom basis. If this was happening to you would would feel a very different. The sensation must be the same as wieghtlessness
Checkout the link below or go to www.time.com and search for decss. Has a link to www.scour.com. Article seems to imply site has DivX movies for download. How can a link to a tool be worse than site which may contain illegal copies?
Ok, Now I did not chase the link and see if the movies were on the site. If I did this I would be breaking the law, correct? I also hope I am not slandering scour.com. If I am I sorry. I also do not mean to imply that scour is primarly in existance for this purpose. It may have denounced the files and rooted them out. I can't even look at the site so how would I know.
If you have salty water and vulcanism AND no existing life there, It may be possible to add earth organisims from mid ocean trenches. They do not need light and live off of nutrients venting from ocean floor.
This would be the first enviroment in which earth life could survive long term unsupported.
That said, I can not think of a reason to do this except maybe as a terraforming hack.
There is indeed TONS of stuff on the web. But there is even MORE stuff missing. If you try to do research on a specific older computer, you will find lots of holes.
Who will gather documents on computers which predate the Internet. (Try searching for info on the IBM 5364 computer, some is there, but how do you cable one up and what processor did it use?)
Who will encourge computer companies to send source code, docs, and other proprietary data into escrow to be recovered and not just tossed.
Who will interview people before they die?
Who will ask to archive/study any notes Torvalds may have put together when working on his degree?
Lots of computer stuff exists only in hard copy.
But to get back to the real topic. Study library science, and try contacting the major computer companies which have existed for more than 15 years. They really need this position, but may need to be convinced.
Re:Good luck, maybe you can set Hollywood straight
on
Computer Historian?
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· Score: 1
Sometime in the last week I saw a TV ad with a large, old fasioned computer room and some reel to reel tape drives spinning in the foreground. It was so lame that I stopped to look at it. Then it turned out to be an ad for Sun Micro systems IIRC.
I hope to see it again, I want to confirm that the computer room in the ad was not intended as a contrast with modern equipment.
You have the correct idea, however, I belive that after the gas is compressed you use cooling coils (or such) arround the hot gas pipes to speed up the process and make things much less wasteful. Once this idea is in process there is no reason to stop at just room temp for the gas.
With the lower temp gasses like hydrogen and helium, there is no other way to reach these temps. (this data is from my dad who worked on liquid gasses in the '50s. It may be obsolete now)
Ok, I don't have the links right here at my finger tips but as far as this junk goes there is a progression of sizes.
Lots and lots of small stuff and comparatively few larger chunks.
Any thing larger than a baseball is currently tracked IIRC and could be avoided and/or intercepted economically. Anything smaller than a centimeter is probably too small to track.
Note: The currently tracked limit is probably smaller than a baseball, and this laser is a cost saver. Cheaper to give a little push now than to physically intercept it or move the station.
(I would LIKE to be able to say that the small stuff would not breach the walls of the station, but I think lots of it in the 9mm to 2mm range would go right on through. Ouch! IMHO)
This junk can be broken into a few catagories.
"Incoming/natural" objects. This stuff is not in orbit. The earth, or in this case the station, is in the way. Statistically this stuff is small and unimportant. Probably not enough warning anyway.
"Equatiorial orbit" space junk. In theory this is like your fellow drivers on the multilane highway. They are mostly going the same way and the relative speeds SHOULD be low. The best way to launch is the direction the earth rotates and starting near the equator. Because you start out with hundreds of mph/kph of head start. These
orbits should mostly be of contant altitude and would not mess with each other much (however, the moon plays with them. see below)
"Polar and strange orbits"
The militaries like to orbit in what are called polar orbits. They go over the poles so they can SEE everything. They require extra fuel to launch. Being near right angles to the equator they can cross the paths other satelites at high speed. There are no stop lights here!
Why do satellites come down and orbits change?
The culprit is the moon. When something is in orbit around the earth, sometimes it gets an extra boost from the moon's gravity and other times it looses energy. So even if it starts out in a perfect orbit, the moon eventually messes with it so that it can not maintain the orbit. (The sun also helps) Because the moon is so large compared to the earth, there can not be any other long term moons of the earth. Don't even look, Sorry.
There is a physics problem called the three body problem. (I could not find any good links to put up here with a just a quick look:-( The general idea is there is that there are no stable solutions to this problem. (Yes, I know about the trojan points L4 and L5, but finding that info is left as a student excersise as we earthlings do not use them currently)
Everything will eventually decay out unless it has some form of orbital manuvering units (impulse engines) to keep it in orbit.
The effects of the moon on orbits are very slow. but can be calcultated. A little nudge from the laser at the correct point could massively speed up this process. IMHO, NASA intends to use this to clean up most of low earth orbit. This would explain the why it is ground based. (power supply and maintenance when lots of shots are done)
Because of the effects of the moon, what was once beside you is soon moving at a different speed and direction and can bump.
BTW: (off topic) Starfleet needs new trainers for pilots as they always set up orbits which are too low. If the planet has no moon, (someone stole most of the moons in StarTrek) it should take decades for an orbit to decay enough to be concerned. Funny thing is that the orbits always look like they are very high orbits.
Please E-mail me. I may be able to help. Four problems need to be overcome but I do not have the time tonight to research.
What versions can you run, can we get it on the correct media, is the 5 1/4 media that I think I still have the correct media, and getting permission to copy media from DECUS.
The last is a formality but I will not violate the hobbyist licence if I can at all avoid it. They give me thousands of dollars of free software and I try very hard to stick to the letter of the license.
Dry ice can be dangerous, but generally only if you are stupid with it.
Do NOT put it in a closed container. Several years ago, some kids put some in a 2 liter soda bottle. The resulting explosion almost killed one of them.
Now you have to be 18 down here (Phoenix, AZ) to buy it (It may have been the law before this accident). It has been much harder of late to find it.
Some other things to consider. Don't eat it. Don't drink liquids that it has been added to before you are sure it is all gone. Sometimes when it is added to water, the thermal stresses cause cracking and you do not want even a small amount to go in your mouth. Can you say burn and bloat?
The alcohol they were using bothers me more. If they had started a fire in that it would have been disasterous. This was done indoors and maybe even in an apartment complex. A small fire could burn for a short while with no visible flames. When it became visible there would be little to do but run.
Please be careful with dry ice and chemicals, we don't need more regulations requiring licences for access to fun stuff !
Why not just put a small chunk of dry ice directly on the heat sink of the CPU. I would not put it directly of the chip, but on the prongs of the heat sink. When it melted on to the prongs of the heat sink, it would be kept it from sliding off.
If this was done before the CPU was powered, I would be concerned that the die could actually be cold enough to prevent a successful POST. Once the cpu was powered up the heat should ballance out
Another concern if dry ice was used would be water condensation from the air. Maybe sealing the area around the edges of the CPU and near by mother board with a non-conductive oil would prevent this.
Slashdot Mirror
I would have three major concerns if I were working with very stong magnetic fields.
1) Are the fields in question constant fields. changing fields generate electrical currents when they cross anything that conducts electricity. (like humans, but wire works better)
2) where does the energy go if the field accedentally fails. Power failures, shorting out the power supply outputs, dialectiric failures. Can cause huge power surges.
3) Pregnant people and children. Could mess with growth and develpoment. (vaugely remember something about this somewhere.}
I would guess that a rapidly changing magnetic field could be used as a murder weapon. The medical examiner would be very confused at first. However you might need millons of dollars of equipment that would not be portable. Also the electric company would know the exact time of death from the power consumption charts
One of my Physics profs in college worked on prototype cyclotrons in the 50's. He told us about a power supply failure (something metal got across the power supply outlets IIRC) He did not feel anything, but there was a bang followed by a crash. A picture hung near the coils had the wire that held it up melted. It then fell to the floor. Check your spare change and dental fillings at the door !
In the floating ping pong ball case. The ball is being lifted (its flying) based on an external force. If you were in the ball you would experience the same sort of sensations you would in a an air plane (of course due to the size of the ball it would be like flying coach ;)
You can rent time in silo shaped wind tunnels (mounted vertically) and fly like the ping pong balls. Very windy of course and noisy.
These bridges are being supported almost on a atom by atom basis. If this was happening to you would would feel a very different. The sensation must be the same as wieghtlessness
http://www.time.com/time/magazine/articles/0,3266, 50590,00.html
Ok, Now I did not chase the link and see if the movies were on the site. If I did this I would be breaking the law, correct? I also hope I am not slandering scour.com. If I am I sorry. I also do not mean to imply that scour is primarly in existance for this purpose. It may have denounced the files and rooted them out. I can't even look at the site so how would I know.
The lawyers are chasing me. Help! help!
This would be the first enviroment in which earth life could survive long term unsupported.
That said, I can not think of a reason to do this except maybe as a terraforming hack.
Who will gather documents on computers which predate the Internet. (Try searching for info on the IBM 5364 computer, some is there, but how do you cable one up and what processor did it use?)
Who will encourge computer companies to send source code, docs, and other proprietary data into escrow to be recovered and not just tossed.
Who will interview people before they die?
Who will ask to archive/study any notes Torvalds may have put together when working on his degree?
Lots of computer stuff exists only in hard copy.
But to get back to the real topic. Study library science, and try contacting the major computer companies which have existed for more than 15 years. They really need this position, but may need to be convinced.
I hope to see it again, I want to confirm that the computer room in the ad was not intended as a contrast with modern equipment.
With the lower temp gasses like hydrogen and helium, there is no other way to reach these temps. (this data is from my dad who worked on liquid gasses in the '50s. It may be obsolete now)
Ok, I don't have the links right here at my finger tips but as far as this junk goes there is a progression of sizes.
Lots and lots of small stuff and comparatively few larger chunks.
Any thing larger than a baseball is currently tracked IIRC and could be avoided and/or intercepted economically. Anything smaller than a centimeter is probably too small to track.
Note: The currently tracked limit is probably smaller than a baseball, and this laser is a cost saver. Cheaper to give a little push now than to physically intercept it or move the station.
(I would LIKE to be able to say that the small stuff would not breach the walls of the station, but I think lots of it in the 9mm to 2mm range would go right on through. Ouch! IMHO)
This junk can be broken into a few catagories.
"Incoming/natural" objects. This stuff is not in orbit. The earth, or in this case the station, is in the way. Statistically this stuff is small and unimportant. Probably not enough warning anyway.
"Equatiorial orbit" space junk. In theory this is like your fellow drivers on the multilane highway. They are mostly going the same way and the relative speeds SHOULD be low. The best way to launch is the direction the earth rotates and starting near the equator. Because you start out with hundreds of mph/kph of head start. These orbits should mostly be of contant altitude and would not mess with each other much (however, the moon plays with them. see below)
"Polar and strange orbits" The militaries like to orbit in what are called polar orbits. They go over the poles so they can SEE everything. They require extra fuel to launch. Being near right angles to the equator they can cross the paths other satelites at high speed. There are no stop lights here!
Why do satellites come down and orbits change? The culprit is the moon. When something is in orbit around the earth, sometimes it gets an extra boost from the moon's gravity and other times it looses energy. So even if it starts out in a perfect orbit, the moon eventually messes with it so that it can not maintain the orbit. (The sun also helps) Because the moon is so large compared to the earth, there can not be any other long term moons of the earth. Don't even look, Sorry.
There is a physics problem called the three body problem. (I could not find any good links to put up here with a just a quick look:-( The general idea is there is that there are no stable solutions to this problem. (Yes, I know about the trojan points L4 and L5, but finding that info is left as a student excersise as we earthlings do not use them currently)
Everything will eventually decay out unless it has some form of orbital manuvering units (impulse engines) to keep it in orbit.
The effects of the moon on orbits are very slow. but can be calcultated. A little nudge from the laser at the correct point could massively speed up this process. IMHO, NASA intends to use this to clean up most of low earth orbit. This would explain the why it is ground based. (power supply and maintenance when lots of shots are done)
Because of the effects of the moon, what was once beside you is soon moving at a different speed and direction and can bump.
BTW: (off topic) Starfleet needs new trainers for pilots as they always set up orbits which are too low. If the planet has no moon, (someone stole most of the moons in StarTrek) it should take decades for an orbit to decay enough to be concerned. Funny thing is that the orbits always look like they are very high orbits.
What versions can you run, can we get it on the correct media, is the 5 1/4 media that I think I still have the correct media, and getting permission to copy media from DECUS.
The last is a formality but I will not violate the hobbyist licence if I can at all avoid it. They give me thousands of dollars of free software and I try very hard to stick to the letter of the license.
Do NOT put it in a closed container. Several years ago, some kids put some in a 2 liter soda bottle. The resulting explosion almost killed one of them.
Now you have to be 18 down here (Phoenix, AZ) to buy it (It may have been the law before this accident). It has been much harder of late to find it.
Some other things to consider. Don't eat it. Don't drink liquids that it has been added to before you are sure it is all gone. Sometimes when it is added to water, the thermal stresses cause cracking and you do not want even a small amount to go in your mouth. Can you say burn and bloat?
The alcohol they were using bothers me more. If they had started a fire in that it would have been disasterous. This was done indoors and maybe even in an apartment complex. A small fire could burn for a short while with no visible flames. When it became visible there would be little to do but run.
Please be careful with dry ice and chemicals, we don't need more regulations requiring licences for access to fun stuff !
Why not just put a small chunk of dry ice directly on the heat sink of the CPU. I would not put it directly of the chip, but on the prongs of the heat sink. When it melted on to the prongs of the heat sink, it would be kept it from sliding off. If this was done before the CPU was powered, I would be concerned that the die could actually be cold enough to prevent a successful POST. Once the cpu was powered up the heat should ballance out Another concern if dry ice was used would be water condensation from the air. Maybe sealing the area around the edges of the CPU and near by mother board with a non-conductive oil would prevent this.