This is almost certainly what is happening. A permanent magnet is stored energy; they *can* release that energy under certain circumstances, but always at the cost of losing their internally organized state and therefore weakening -- a lower energy state.
Especially since most noise generated by typical PC fans is from vibrations in the hub. PC fans are cheap and crappy, and usually don't have good bearings.
The use of permanent magnets in motors has been common practice for over 20 years, since high-strength permanent magnet alloys became good enough.
A permanent magnet contains stored energy from when the magnet was made. An electomagnet uses electricity on the fly. Note that one of the two magnets in a motor *must* be an electromagnet (usually the stator, for convenience of wiring, but occationally the rotor, especially in DC motors) since the motion requires a varying magnetic field.
Speaking of DC motors: ALL motors run on alternating current in some form. In a classical DC motor, the alternating current is produced by the motion of the motor itself by having the electromagnet be on the rotor, and have the brushes leading the current onto the rotor brush against a "commutator" -- two half-cylinders back to back -- instead of slip rings. Unfortunately, this requires brushes, which wear out and are generally unpleasant to deal with. As a result, especially higher-power motors have generally switched to using brushless AC motors using electronic commutators.
The biggest problem is that people don't have the decency to tell the person they're talking to that they're on a cell phone and driving.
If a critical driving moment comes up, you HAVE to be able to drop what you're doing and DRIVE. This is automatic for your passengers, but if you haven't let your conversation partner know this, they'll think you disappeared.
Thus, way too many people try to hang on to their phones when they really needed to be dropped. BAD.
The problem with the NVidia drivers is that at least on my Opteron system they crash the box every few days. If I run without it it stays up arbitrarily long.
Well, we're still working on getting a net-gain fusion reaction going with deuterium and tritium, which is a considerably easier fusion reaction to start than deuterium and Helium-3. The advantage with the D-He3 reaction is that it is theoretically aneutronic, but in any D-He3 fusion-capable environment you're going to have enough D-D fusion to have to worry about neutrons anyway...
Sweden takes part of peace-keeping missions all the time, mostly under U.N. flag, but they also have troops in Kosovo; I believe in the British sector.
Although it may not be that recent, Sweden did have a long-standing maritime border conflict with the USSR, during which Soviet MiG fighters would violate Swedish airspace on a regular basis. JAS 39 Gripen was designed in part to make sure that the RSAF would be able to outfly the Soviets. A little obsolete right now, though, especially since those areas are now the Baltic countries with which Sweden has excellent relations.
The end of the Cold War definitely has put the role of the traditional Swedish military in question. The threat of an invasion is currently zero, and the only realistic way that could change would be a major and very sudden change in Russia. This is also true of NATO; I personally suspect that we'll see a major realignment of the role of NATO, the EU defence force (WEU), and the neutral countries (Sweden, Finland, Austria and Ireland) within the next decade.
For a company that very suddenly turns ugly, like SCO, there is only one piece of advice: get out quickly. If you get out within a reasonable amount of time, the entire defense you need is "management changed the company and I wanted no part of that." End of story. The longer you stick around, the harder you're going to be able to claim to have nothing to do with it.
Enron is more unfortunate, because management there defrauded not only investors but their own employees; in the case of SCO there is no secret to anybody what kind of shit they're pulling.
Not only did they come late in the game, but they are entering at the minimum funding level that allows them to participate. This means Canada, Russia and South Korea is each putting at least as much into this as the U.S. is.
Canada actually had an excellent bid to be the hosting country, when rather unexpectedly Ottawa suddenly decided that they didn't want to play.
No, it means our bandwidth-limiting isn't operating in facist mode at the moment. ISC are very understanding and usually allow us to go somewhat over limit during traffic peaks.
Not quite. It's estimated that one human being in the first world today does the work of about 80 medieval people. Even though some chunk ends up with the fatcats, it still makes it a much bigger pie to divide up.
Digital can replace ISO 100/200/400 color print (negative) film. However, I do not see digital replacing slower speed slide film (i.e. Kodachrome) or some of the slow speed B & W films, since those types of film give a certain recognizable quality that no Photoshop master could ever duplicate.
Not too long ago it was that digital would never replace film, period. It's just a matter of time before there are digital sensors of that quality. Really.
At a MOO system I run with some friends, we use tkMOO-light, http://www.awns.com/tkMOO-light/, with considerable success. Since it is written in Tcl/Tk, it runs on any system which has Tcl/Tk ported; they have prepackaged versions including the Tcl/Tk runtime for Win and Mac for download.
This means that it is impossible to build a non-MS piece of software that can read.doc files that your clients will invariably send.
In other words, Microsoft is using DRM to enforce their monopoly "by name." No need to keep switching incompatible formats, it will be either impossible or illegal (DMCA) to construct a Word clone.
... have been around for many decades, and are spewing *mega*watts of signals in the same general frequency range as cell phones for all that time.
This would have much, much more health effects for those living nearby than all the microwaves we're "drowning" in ever will. To the best of my knowledge, it's zip.
According to my handy chemical table collection, the reaction 2Al + 3/2 O2 -> Al2O3 liberates 1670 kJ/mol at STP. 2 mol Al = 53.9630 g, so the energy density for Al assuming O2 is available is 30.95 MJ/kg.
For hydrogen, H2(g) + 1/2 O2(g) -> H2O(g) liberates 241.8 kJ/mol. 1 mol H2 = 2.01594 g, so the energy density is 119.9 MJ/kg.
If you also can obtain energy from liquifying the steam you get another 44.0 kJ/mol, for a total of 141.8 MJ/kg.
For gasoline, represented by octane (C8H18), the oxidation reaction liberates 5512.2 kJ/mol when the water in the product is in liquid form. This corresponds to an energy density of 48.3 MJ/kg (44.7 MJ/kg when the exhaust is steam.)
The world champion in taxation, the Kingdom of Sweden, has had tax on taxes for quite a while. How, you might ask? Well, you see, officially the sales tax ("moms") rate is 20%. However, this is 20% of the price including sales tax, so the actual tax rate actually works out to 25% -- 20% is the tax on the goods, and 5% is the tax on the tax!
The one nice thing is that all labelled prices include all the taxes, unlike in the U.S. where an advertised price and what you pay has very little to do with each other, since you get all kinds of taxes, fees, and surchages tacked on...
NOx is only a problem for internal-combustion engines. Fuel cells, which seems to be the main target for the hydrogen-powered vehicle push, doesn't have that problem.
As far as zinc-air: zinc is both way too heavy and way too expensive to be a viable vehicle fuel!
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This is almost certainly what is happening. A permanent magnet is stored energy; they *can* release that energy under certain circumstances, but always at the cost of losing their internally organized state and therefore weakening -- a lower energy state.
Driving the magnet through the rings transfers energy from the piston to the rings, making the reaction no longer Carnot.
Sorry, dude, the 2nd law of thermodynamics may be one of the least understood laws of nature, but it still holds.
Especially since most noise generated by typical PC fans is from vibrations in the hub. PC fans are cheap and crappy, and usually don't have good bearings.
First of all...
The use of permanent magnets in motors has been common practice for over 20 years, since high-strength permanent magnet alloys became good enough.
A permanent magnet contains stored energy from when the magnet was made. An electomagnet uses electricity on the fly. Note that one of the two magnets in a motor *must* be an electromagnet (usually the stator, for convenience of wiring, but occationally the rotor, especially in DC motors) since the motion requires a varying magnetic field.
Speaking of DC motors: ALL motors run on alternating current in some form. In a classical DC motor, the alternating current is produced by the motion of the motor itself by having the electromagnet be on the rotor, and have the brushes leading the current onto the rotor brush against a "commutator" -- two half-cylinders back to back -- instead of slip rings. Unfortunately, this requires brushes, which wear out and are generally unpleasant to deal with. As a result, especially higher-power motors have generally switched to using brushless AC motors using electronic commutators.
The biggest problem is that people don't have the decency to tell the person they're talking to that they're on a cell phone and driving.
If a critical driving moment comes up, you HAVE to be able to drop what you're doing and DRIVE. This is automatic for your passengers, but if you haven't let your conversation partner know this, they'll think you disappeared.
Thus, way too many people try to hang on to their phones when they really needed to be dropped. BAD.
The problem with the NVidia drivers is that at least on my Opteron system they crash the box every few days. If I run without it it stays up arbitrarily long.
It is punditry, but it's also something that has been said quite a few times before, including by Miguel de Icaza of GNOME fame.
Really. There is a ton of OSS software with really shitty user interfaces, but anything involving fonts or printing seems to be crappy beyond belief.
Well, we're still working on getting a net-gain fusion reaction going with deuterium and tritium, which is a considerably easier fusion reaction to start than deuterium and Helium-3. The advantage with the D-He3 reaction is that it is theoretically aneutronic, but in any D-He3 fusion-capable environment you're going to have enough D-D fusion to have to worry about neutrons anyway...
Sweden takes part of peace-keeping missions all the time, mostly under U.N. flag, but they also have troops in Kosovo; I believe in the British sector.
Although it may not be that recent, Sweden did have a long-standing maritime border conflict with the USSR, during which Soviet MiG fighters would violate Swedish airspace on a regular basis. JAS 39 Gripen was designed in part to make sure that the RSAF would be able to outfly the Soviets. A little obsolete right now, though, especially since those areas are now the Baltic countries with which Sweden has excellent relations.
The end of the Cold War definitely has put the role of the traditional Swedish military in question. The threat of an invasion is currently zero, and the only realistic way that could change would be a major and very sudden change in Russia. This is also true of NATO; I personally suspect that we'll see a major realignment of the role of NATO, the EU defence force (WEU), and the neutral countries (Sweden, Finland, Austria and Ireland) within the next decade.
For a company that very suddenly turns ugly, like SCO, there is only one piece of advice: get out quickly. If you get out within a reasonable amount of time, the entire defense you need is "management changed the company and I wanted no part of that." End of story. The longer you stick around, the harder you're going to be able to claim to have nothing to do with it.
Enron is more unfortunate, because management there defrauded not only investors but their own employees; in the case of SCO there is no secret to anybody what kind of shit they're pulling.
Not only did they come late in the game, but they are entering at the minimum funding level that allows them to participate. This means Canada, Russia and South Korea is each putting at least as much into this as the U.S. is.
Canada actually had an excellent bid to be the hosting country, when rather unexpectedly Ottawa suddenly decided that they didn't want to play.
No, it means our bandwidth-limiting isn't operating in facist mode at the moment. ISC are very understanding and usually allow us to go somewhat over limit during traffic peaks.
The actual wire is gigabit, 1000Base-SX.
-hpa
Of course, switched Ethernet is full duplex, too.
Old-style shared/half-duplex Ethernet is mostly historical.
Not quite. It's estimated that one human being in the first world today does the work of about 80 medieval people. Even though some chunk ends up with the fatcats, it still makes it a much bigger pie to divide up.
Not too long ago it was that digital would never replace film, period. It's just a matter of time before there are digital sensors of that quality. Really.
Do you include me in that?
-hpa
CID blocking for telemarketers becomes illegal on 1 January 2004.
So far, the only think that keeps the DMCA on the books is selective prosecution, and relying on its chilling effects to do most of the dirty work.
At a MOO system I run with some friends, we use tkMOO-light, http://www.awns.com/tkMOO-light/, with considerable success. Since it is written in Tcl/Tk, it runs on any system which has Tcl/Tk ported; they have prepackaged versions including the Tcl/Tk runtime for Win and Mac for download.
Bullshit.
.doc files that your clients will invariably send.
This means that it is impossible to build a non-MS piece of software that can read
In other words, Microsoft is using DRM to enforce their monopoly "by name." No need to keep switching incompatible formats, it will be either impossible or illegal (DMCA) to construct a Word clone.
BIG problem, methinks...
Who writes this insane crap.
SCO.
... have been around for many decades, and are spewing *mega*watts of signals in the same general frequency range as cell phones for all that time.
This would have much, much more health effects for those living nearby than all the microwaves we're "drowning" in ever will. To the best of my knowledge, it's zip.
According to my handy chemical table collection, the reaction 2Al + 3/2 O2 -> Al2O3 liberates 1670 kJ/mol at STP. 2 mol Al = 53.9630 g, so the energy density for Al assuming O2 is available is 30.95 MJ/kg.
For hydrogen, H2(g) + 1/2 O2(g) -> H2O(g) liberates 241.8 kJ/mol. 1 mol H2 = 2.01594 g, so the energy density is 119.9 MJ/kg.
If you also can obtain energy from liquifying the steam you get another 44.0 kJ/mol, for a total of 141.8 MJ/kg.
For gasoline, represented by octane (C8H18), the oxidation reaction liberates 5512.2 kJ/mol when the water in the product is in liquid form. This corresponds to an energy density of 48.3 MJ/kg (44.7 MJ/kg when the exhaust is steam.)
The world champion in taxation, the Kingdom of Sweden, has had tax on taxes for quite a while. How, you might ask? Well, you see, officially the sales tax ("moms") rate is 20%. However, this is 20% of the price including sales tax, so the actual tax rate actually works out to 25% -- 20% is the tax on the goods, and 5% is the tax on the tax!
The one nice thing is that all labelled prices include all the taxes, unlike in the U.S. where an advertised price and what you pay has very little to do with each other, since you get all kinds of taxes, fees, and surchages tacked on...
NOx is only a problem for internal-combustion engines. Fuel cells, which seems to be the main target for the hydrogen-powered vehicle push, doesn't have that problem.
As far as zinc-air: zinc is both way too heavy and way too expensive to be a viable vehicle fuel!