Recent content by f95toli

? You do know that 3G is used for virtually ALL mobile phones around the world, don't you (the US is an exception)? Hence, the answer to your question would be just about every company where the employees use mobile phones.

No, they do not exist. Because there are an infinite number of possible solutions. There are however books/databases with numerical sequences. A well known example is the "Sloane" http://www.research.att.com/~njas/sequences/

It varies. Sometimes we quite litteraly fabricate single chips and they are either 5x5mm2 or 2.5x2.5xmm2; usually because we are using an expensive or rare substrates (say a good batch of GaAs with embedded 2DEG). The masks are either 3" or 4", this tends to be the standard size for manual...

I don't know for sure how it is done in industry. But I would assume that at least some steps include straightforward photo-lithography (for patterning pads etc) which at least in principle can be done over a whole wafer at once. Also, you don't HAVE to use the whole mask. When I design masks...

While it is of course correct that there is no such thing as a "jewish race" or even genetic link between all jews the above is indeed largely true. A good example is Russia where "Jewish" IS in fact considered to be a nationality, if you look in a passports that belongs to a Russian Jew it...

Yes, as far as a I remember Newton prefered to use momentum throughout his work. This means that he instead of writing F=ma he prefered to use F=dp/dt=mdv/dt You can easilty derive the expression Born2wire mentioned if you just conservation of energy (and he is right about the sqrt(2)) An...

Someone (I don't remember the name) came up with an analytical solution to the 3-body problem about 10 years ago. However, the solution is in the form of a very complicated series so it is useless for practical calculations. Also, remember that being able to solve an equation analytically...

Both me and Born2Wire are active at www.physicsforums.com which has a very active sub-forum for number theory. As far as I can tell (again, not my field) some of the people active in that forum know a LOT about primes so they should be able to give you some good feedback if that is what you are...

This is definitly not my area (I am a physicist) but -assuming that your proof is correct (btw, there is something wrong with your link)- have you verified that you simply haven't "re-invented" something that is already known? Rember that people have been working on this for well over 2000...

What he was found guilty of is irrelevant. He was serving a life sentence in Scotland. Due process in Scotland is that if someone has terminal cancer (or something similar) that person is let out of prison a few months before he/she dies. They might make an exception if there is a risk to the...

The whole point of sending an ex-president is that he can NOT negotiate on behalf of the US. Clinton was merely visiting NK and had a friendly chat with their leader, the leader in question then decided to release the prisoners. I agree that it is a bit silly but these things happens all the...

Eh? You DO realize that the state is raising a lot of children, don't you? There are over 500 000 kids in foster care in the US. The main problem here in the UK is that social services tend to wait far too long before children are separated from abusive parents and -as a number of recent...

No, that is not quite how it works. I haven't read the article the OP linked to but it is well known that a "clean coal" plant will be less efficient than a conventional plant (although 30% sound hight; I've heard numbers around 25%). The reason is simply that the sequestration uses quite a bit...

Google Fabry-Perot interferometer, which is essentially what you are describing.

Indeed, but while doing so it is also losing POTENTIAL energy (reemmber that the sum of potential+kinetic energy is constant); and since you need to raise the ball to the same height again in order to be able to repeat the cycle there is no net gain of energy than can compensate for the energy...