No I didn't. I explicitly adressed it. "R changing as a result of temperature dependence" is not "an indepdenent operation" if temperature depends on voltage. Of course it need not do, but it would in the simple experimental setup described.
If R changes with V (as it does for nanostructures, and in the simple bulb setup) all Ohm's law really states is that "there exists a number R=V/I" but we already knew that for any I not equal zero. The practicality of Ohm's law is that R is in many practical cases independent of V and I (or has some well-known dependency), but that's by no means a fundamental law of nature.
You're making a big mistake- you're assuming R has to be a constant.
I assume R has to be independent of V and I. Otherwise Ohm's law doesn't add any information, just a redundant symbol (R). When it comes to nanostructures Ohm's law is definitely out the window - have a look at figure 1 (bottom left) showing the Coulomb blockade effect. Try to fit a straight line to the jagged graph at the bottom:-)
In the bulb example R is in principle independent of V, but in most practical situations it would depend indirectly on V as described. It is still clear that Ohm's law is
Valid in a limited regime
Not a fundamental law of nature
Extremely useful.
Given point 1. and 2. I still think Ohm's law ranks poorly as the greatest equation of all time, but then again I'm not an electrical engineer.
Except it's only true within certain limits - if you look at nanostructures they often have I/V characteristics that are not linear at all. It isn't really useful for superconductors either.
Even if you use V=IR for a filament bulb, it might not be correct, as the temperature changes when you apply more voltage, leading to a different resistivity of the filament, so R is not a constant. (Of course you could set up your experiment to keep the filament at constant temperature, but that's not really realistic).
In short, this equation is very important for lots of technology, but it's really not a "deep" statement on its own - it's merely a consequence of underlying laws of nature. (Maxwell equations, quantum mechanics) and then only under special circumstances. Therefore I would prefer something like the least action principle, Schrödingers equation, or something like that. The ergodicity principle is extremely full of beauty and consequence too, but I haven't seen it stated as an equation.
In Denmark a weekend cottage was obliterated by a missile fired by a danish frigate (no one hurt). It became known as the "Oops missile" after a danish newspaper carried an aerial photo of the devastated dwelling with the caption OOOOPS!.
A friend who has served in the navy told me that the standard bearing for non-targeted missiles was 123 degrees, and that the missile would seek out any large structures to target as its fuel ran out. The bearing and range would have had it target the residential blocks in the Bay of Koege:-O Fortunately it didn't make it across the shore - it didn't rise fast enough and struck the empty houses.
Beer mixed with cola (aka Diesel) is quite popular in Germany - the most popular brand seems to be Mixery. Dunno why though - they've got some of the best beers in the world.
a minimum of 16 oz of beer per hour, which means three hours of drinking is the equivalent of a McDonalds extra-value meal.
I can find those american "oz" and "calorie" units in my data book, but could you please convert "McDonalds extra-value meal" to the Système International? It's bad enough as it is.
This civilisation will eventually be forced to choose between dying of the cold, or using their time machine to plunder the past for energy.
Suppose that the machine needed some kind of receiver? Then we wouldn't notice time-travel until somebody built one (and recieved the first futurogram from his tomorrow-self).
Southeast Asia is a subregion of Asia. It includes all of the following territories:
Brunei
Cambodia
East Timor
Indonesia
Laos
Malaysia
Myanmar (Burma)
The Philippines
Singapore
Thailand
Vietnam
When you look at a map it is obvious that Korea is really pretty far to the north, which makes it reasonable that it's included with Japan, Taiwan and some Chinese provinces in East Asia.
And do it using
User Mode Linux. UML is loosely spoken a way to simulate linux machines on top of another machine. Then you'll only need one machine, and you can experiment without needing to reinstall - backing up/restoring a UML machine is a matter of copying a single file.
Personally I've learned a lot from the Rute Linux Tutorial though it's a bit dated now.
"It's breaking up, is that it?" he shouted. "It's got a hold full of epsilonic radiating aorist rods or something that'll fry this whole space sector for zillions of years back and it's breaking up. Is that the story? Is that what we're going down to find? Am I going to come out of that wreck with even more heads?"
"It cannot possibly be a wreck, Mr. Beeblebrox," insisted the official. "the ship is guaranteed to be perfectly safe. It cannot possibly break up."
"Then why are you so keen to go and look at it?"
"We like to look at things that are perfectly safe."
I had a German friend who went to school here, in the U.S., for a while, and the thing he said that struck him about the United States was how everyone is so determined to be patrotic here.
I don't know how broad the cultural experience of your German friend is, but Germany is a special case since German patriotism has been thoroughly tainted by the nazi regime. Watch France on the Day of the Bastille for European patriotism. Watch the Scandinavian countries - quite patriotic though their sizes stunts claims of "greatness" or "gloire" before they're uttered. Patriotism in Europe differs greatly among the countries, but it's there.
As for the Germans, I sincerely pity them. I think it's quite natural to identify with ones culture(s) and nation(s) of origin, but this is very hard when this identity and its symbols have been used for legitimizing mass slaughter within living memory. I once read a writer theorizing that this has lead to Germany's staunch EU-support line - this was the only place the reemerging young social democrats could go with their idealism after 1945.
Sending someone off to boarding/military/vocational schools when they are in their mid-teens will do nothing but help to alienate the child in a time when they might be alienated enough.
Kids need time to be apart *AND* they need time to grow but seperating them from their family at this point of their lives is hardly the way to do it. Wait for them to be of a mature enough age 18+ here in the States and don't let the little bastards come back.
I went to a boarding school for a year and liked it. (Turned 16 while I was there). Going to such schools in grade 9 or 10 is not uncommon in Denmark. My parents lived 3 hours by train away, I visited every month.
I got a lot of new friends, and learned a little about how to handle stuff by myself. I think the most important thing is that the place should be geared for mid-teeners, not just college-too-early.
The thing is, this was a very sheltered (christian) environment where the teachers were looking out for us. (They actually seemed to care!). If you can find somewhere similar (though not necessarily christian) and your kid wants to go I'll recommend it. I'd definitely do it again, and when I moved out for real at age 20 I already knew how to wash my own clothes.
I'd say just be cosmic lurkers until we are damn sure it is safe to be sticking our nose into things.
I think the gains from sharing information will probably be greater to both parties than the slim risk from a planet so far away. Let's meet new people!
We need to just STFU and listen, not broadcast where we are so the Destroyers can find us!
So, how do you destroy a civilization at a distance of many lightyears? I think the gains from sharing information will probably be greater to both parties than the slim risk from a planet so far away.
Sentences that use every letter in the alphabet exactly once are called pangrams. Several examples exist. The "Veldt jynx.." one may be the oldest - at least it's the only one i recall seeing in the Guiness Book of Records.
The only kind of fiction banned in Denmark is child porn. I think there's some kind of exception if you can argue that it has "artistic value", so The Metamorphosis of Prime Intellect might be legal. (Read chap. 8 to see what I mean, but you now know what to expect. Be warned.)
There is a nazi local radio station that used to receive government culture support funding - like every other local radio. This was not very popular, so recently the rules were made just flexible enough to deny them funding. I suppose Denmark is so lenient in this regard because it's obvious that the danish nazis are a bunch of jerks who can't even tie their own shoes. (They were even during the german occupation)
Judaism has nothing remotely resembling a devil character
How about this snake thing in Genesis 3? I'm aware that my interpretation of Genesis is colored by christianity, but it surely does "remotely resemble a devil character". AFAIK every branch of judaism since the time of Jesus at least has recognized the Torah - including Genesis. What weight they attach to the snake may differ though.
In Europe, it's probably somewhat on its way out. France abandoned it in 2001. Here in Denmark the general feeling is that it's gotta go sometime in the future, but that it's not politically convenient right now.
This makes sense since after the end of the cold war we won't have to stop Soviet tanks. Instead we have a small core of professional soldiers sent to places like Kosova, Iraq, Cyprus, Afghanistan etc. There's simply no plausible need to defend against a large-scale invasion in the foreseeable future.
Slashdot Mirror
There's a comprehensive Nature Special on it. If you're a subscriber you can also download the original articles.
No I didn't. I explicitly adressed it. "R changing as a result of temperature dependence" is not "an indepdenent operation" if temperature depends on voltage. Of course it need not do, but it would in the simple experimental setup described.
If R changes with V (as it does for nanostructures, and in the simple bulb setup) all Ohm's law really states is that "there exists a number R=V/I" but we already knew that for any I not equal zero. The practicality of Ohm's law is that R is in many practical cases independent of V and I (or has some well-known dependency), but that's by no means a fundamental law of nature.
I assume R has to be independent of V and I. Otherwise Ohm's law doesn't add any information, just a redundant symbol (R). When it comes to nanostructures Ohm's law is definitely out the window - have a look at figure 1 (bottom left) showing the Coulomb blockade effect. Try to fit a straight line to the jagged graph at the bottom :-)
In the bulb example R is in principle independent of V, but in most practical situations it would depend indirectly on V as described. It is still clear that Ohm's law is
- Valid in a limited regime
- Not a fundamental law of nature
- Extremely useful.
Given point 1. and 2. I still think Ohm's law ranks poorly as the greatest equation of all time, but then again I'm not an electrical engineer.Even if you use V=IR for a filament bulb, it might not be correct, as the temperature changes when you apply more voltage, leading to a different resistivity of the filament, so R is not a constant. (Of course you could set up your experiment to keep the filament at constant temperature, but that's not really realistic).
In short, this equation is very important for lots of technology, but it's really not a "deep" statement on its own - it's merely a consequence of underlying laws of nature. (Maxwell equations, quantum mechanics) and then only under special circumstances. Therefore I would prefer something like the least action principle, Schrödingers equation, or something like that. The ergodicity principle is extremely full of beauty and consequence too, but I haven't seen it stated as an equation.
The story of a geek and his Casino wins. One of the best articles on kuro5hin ever.
In Denmark a weekend cottage was obliterated by a missile fired by a danish frigate (no one hurt). It became known as the "Oops missile" after a danish newspaper carried an aerial photo of the devastated dwelling with the caption OOOOPS!.
:-O Fortunately it didn't make it across the shore - it didn't rise fast enough and struck the empty houses.
A friend who has served in the navy told me that the standard bearing for non-targeted missiles was 123 degrees, and that the missile would seek out any large structures to target as its fuel ran out. The bearing and range would have had it target the residential blocks in the Bay of Koege
Face it.
Beer mixed with cola (aka Diesel) is quite popular in Germany - the most popular brand seems to be Mixery. Dunno why though - they've got some of the best beers in the world.
How hard is it to drop fire one 'soldiers' with AK-47s and sandals?
Uhh.. I don't know - ask a Vietnam vet perhaps?
Anyone know how Mdk's finances look right now? They've been in some trouble.
a minimum of 16 oz of beer per hour, which means three hours of drinking is the equivalent of a McDonalds extra-value meal.
I can find those american "oz" and "calorie" units in my data book, but could you please convert "McDonalds extra-value meal" to the Système International? It's bad enough as it is.
You can. If you write for Wikipedia.
This civilisation will eventually be forced to choose between dying of the cold, or using their time machine to plunder the past for energy.
Suppose that the machine needed some kind of receiver? Then we wouldn't notice time-travel until somebody built one (and recieved the first futurogram from his tomorrow-self).
Really? Where'd they move to?
East Asia. Let's see what Wikipedia says:
Southeast Asia is a subregion of Asia. It includes all of the following territories:
Brunei
Cambodia
East Timor
Indonesia
Laos
Malaysia
Myanmar (Burma)
The Philippines
Singapore
Thailand
Vietnam
When you look at a map it is obvious that Korea is really pretty far to the north, which makes it reasonable that it's included with Japan, Taiwan and some Chinese provinces in East Asia.
set up a small network at home
And do it using User Mode Linux. UML is loosely spoken a way to simulate linux machines on top of another machine. Then you'll only need one machine, and you can experiment without needing to reinstall - backing up/restoring a UML machine is a matter of copying a single file.
Personally I've learned a lot from the Rute Linux Tutorial though it's a bit dated now.
Tirelessly guiding, driving and pulling the european anti-software patent movement.
Without Hartmut Pilch the EU would have legalized software patents by now. Just think what that would do to Free Software...
"It's breaking up, is that it?" he shouted. "It's got a hold full of epsilonic radiating aorist rods or something that'll fry this whole space sector for zillions of years back and it's breaking up. Is that the story? Is that what we're going down to find? Am I going to come out of that wreck with even more heads?"
"It cannot possibly be a wreck, Mr. Beeblebrox," insisted the official. "the ship is guaranteed to be perfectly safe. It cannot possibly break up."
"Then why are you so keen to go and look at it?"
"We like to look at things that are perfectly safe."
I had a German friend who went to school here, in the U.S., for a while, and the thing he said that struck him about the United States was how everyone is so determined to be patrotic here.
I don't know how broad the cultural experience of your German friend is, but Germany is a special case since German patriotism has been thoroughly tainted by the nazi regime. Watch France on the Day of the Bastille for European patriotism. Watch the Scandinavian countries - quite patriotic though their sizes stunts claims of "greatness" or "gloire" before they're uttered. Patriotism in Europe differs greatly among the countries, but it's there.
As for the Germans, I sincerely pity them. I think it's quite natural to identify with ones culture(s) and nation(s) of origin, but this is very hard when this identity and its symbols have been used for legitimizing mass slaughter within living memory. I once read a writer theorizing that this has lead to Germany's staunch EU-support line - this was the only place the reemerging young social democrats could go with their idealism after 1945.
Sending someone off to boarding/military/vocational schools when they are in their mid-teens will do nothing but help to alienate the child in a time when they might be alienated enough.
Kids need time to be apart *AND* they need time to grow but seperating them from their family at this point of their lives is hardly the way to do it. Wait for them to be of a mature enough age 18+ here in the States and don't let the little bastards come back.
I went to a boarding school for a year and liked it. (Turned 16 while I was there). Going to such schools in grade 9 or 10 is not uncommon in Denmark. My parents lived 3 hours by train away, I visited every month.
I got a lot of new friends, and learned a little about how to handle stuff by myself. I think the most important thing is that the place should be geared for mid-teeners, not just college-too-early.
The thing is, this was a very sheltered (christian) environment where the teachers were looking out for us. (They actually seemed to care!). If you can find somewhere similar (though not necessarily christian) and your kid wants to go I'll recommend it. I'd definitely do it again, and when I moved out for real at age 20 I already knew how to wash my own clothes.
I'd say just be cosmic lurkers until we are damn sure it is safe to be sticking our nose into things.
I think the gains from sharing information will probably be greater to both parties than the slim risk from a planet so far away. Let's meet new people!
We need to just STFU and listen, not broadcast where we are so the Destroyers can find us!
So, how do you destroy a civilization at a distance of many lightyears? I think the gains from sharing information will probably be greater to both parties than the slim risk from a planet so far away.
Sentences that use every letter in the alphabet exactly once are called pangrams. Several examples exist. The "Veldt jynx.." one may be the oldest - at least it's the only one i recall seeing in the Guiness Book of Records.
The only kind of fiction banned in Denmark is child porn. I think there's some kind of exception if you can argue that it has "artistic value", so The Metamorphosis of Prime Intellect might be legal. (Read chap. 8 to see what I mean, but you now know what to expect. Be warned.)
There is a nazi local radio station that used to receive government culture support funding - like every other local radio. This was not very popular, so recently the rules were made just flexible enough to deny them funding. I suppose Denmark is so lenient in this regard because it's obvious that the danish nazis are a bunch of jerks who can't even tie their own shoes. (They were even during the german occupation)
Judaism has nothing remotely resembling a devil character
How about this snake thing in Genesis 3? I'm aware that my interpretation of Genesis is colored by christianity, but it surely does "remotely resemble a devil character". AFAIK every branch of judaism since the time of Jesus at least has recognized the Torah - including Genesis. What weight they attach to the snake may differ though.
In Europe, it's probably somewhat on its way out. France abandoned it in 2001. Here in Denmark the general feeling is that it's gotta go sometime in the future, but that it's not politically convenient right now.
This makes sense since after the end of the cold war we won't have to stop Soviet tanks. Instead we have a small core of professional soldiers sent to places like Kosova, Iraq, Cyprus, Afghanistan etc. There's simply no plausible need to defend against a large-scale invasion in the foreseeable future.