Search found 20 matches

by Avian
Sat Sep 14, 2013 11:34 am UTC
Forum: Science
Topic: Putting elements in a super collider. How?
Replies: 10
Views: 4318

Re: Putting elements in a super collider. How?

Here is a photograph and an article from February this year when they were refilling the source of lead nuclei for LHC:

http://home.web.cern.ch/about/updates/2 ... source-lhc
by Avian
Wed Sep 11, 2013 3:56 pm UTC
Forum: Science
Topic: History of IC manufacturing?
Replies: 3
Views: 1708

Re: History of IC manufacturing?

It's not a book, but maybe it helps. A few years ago I spent an unreasonable amount of time browsing through old HP Journal issues. You can find some really fascinating articles about old semiconductor processes there. http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/hpjindex.html Technology I was res...
by Avian
Sun Sep 01, 2013 12:52 pm UTC
Forum: Science
Topic: Two beams of light affecting each other
Replies: 9
Views: 2571

Re: Two beams of light affecting each other

I don't think the arrangement you propose would be able to detect 1 photon in zillions being deflected. But maybe if your light source A was very dim and you waited a very long time, you might get an observable deflection. :) Thanks for the explanation. I was more interested in theoretical possibil...
by Avian
Sat Aug 31, 2013 6:58 pm UTC
Forum: Science
Topic: Two beams of light affecting each other
Replies: 9
Views: 2571

Two beams of light affecting each other

Is it possible for two intersecting beams of light to affect each other? I'm thinking of the following experiment: A beam of light is emitted from a source A (e.g. a laser) to a detector. At one point in time, source B is switched on and its beam intersects the first beam somewhere on its path betwe...
by Avian
Thu Jun 25, 2009 9:42 am UTC
Forum: Science
Topic: Extracting energy from a permanent magnet
Replies: 66
Views: 42997

Re: Extracting energy from a permanent magnet

zalzane wrote:A magnetic field does not store energy.


Guys at CERN also thought so, until a faulty coil caused the field of one of their superconducting magnets to collapse and blew a 10-ton machine apart :?
by Avian
Wed Jun 24, 2009 9:15 pm UTC
Forum: Science
Topic: Extracting energy from a permanent magnet
Replies: 66
Views: 42997

Extracting energy from a permanent magnet

Permanent magnets in some more or less complex arrangement are popular components of attempted "free-energy" and perpetual motion machines. In articles that try to explain why such machines can't work I often read that there are some machines that appear to actually produce energy, but act...
by Avian
Sat Jun 20, 2009 9:18 am UTC
Forum: Science
Topic: Iron core electromagnet question
Replies: 3
Views: 1079

Re: Iron core electromagnet question

A ferromagnetic material like steel can have relative permeability in the order of several 1000s. That means that the magnetic flux density (B) will increase that many times inside the material. So you might as well have several T in the core, but that doesn't help you much, since you are probably i...
by Avian
Sun Jun 14, 2009 4:38 pm UTC
Forum: Science
Topic: Warp Drive Engine Could Suck Earth Into Black Hole
Replies: 6
Views: 1261

Re: Warp Drive Engine Could Suck Earth Into Black Hole

In a universe where 1 plus 1 equals 3 This sounds like the reporter doesn't know what he is talking about. Rules of physics may certainly change in a different universe, but mathematics stays the same. The sum of interior angles in a triangle may change depending on the geometry of space, but 1+1 e...
by Avian
Sun May 31, 2009 11:22 am UTC
Forum: Science
Topic: The First Self-Replicator?
Replies: 10
Views: 1775

Re: The First Self-Replicator?

After all, computer technology (such as CDs) are 2-D. This made me wonder... I think it's worth adding here that CD and DVDs are as 1-D as DNA if you follow your classification. The data they contain is a string of ones and zeros that is essentially accessed sequentially, just like DNA. And just li...
by Avian
Wed May 13, 2009 5:54 pm UTC
Forum: Science
Topic: LEDs
Replies: 7
Views: 1323

Re: LEDs

Therefore, they usually release this energy in the form of a phonon, which is a quantized mechanical vibration in the crystal lattice. The common silicon P-N junction is a very inefficient light emitter, but it still releases a photon every now and then. These are in the IR part of the spectrum and...
by Avian
Sun Apr 05, 2009 11:28 am UTC
Forum: Science
Topic: Probing The Inaccuracies: Space Warfare
Replies: 271
Views: 26399

Re: Probing The Inaccuracies: Space Warfare

There is no such thing as "stealth in space"! ... The problem lies with the heat generated by a spacecraft. Even if you keep the spacecraft's engines off, you're going to have the 290+ Kelvin crew section lighting up against the background of space, and that's before you get to the heat g...
by Avian
Sat Apr 04, 2009 11:07 pm UTC
Forum: Science
Topic: inductors and magnetic flux
Replies: 8
Views: 2006

Re: inductors and magnetic flux

So my book asks me to show that the equivalent inductance between two inductors connected in parallel is given by: 1/L eq = 1/L 1 + 1/L 2 Using magnetic fluxes is the wrong approach here. Equivalent inductance means equivalent in terms of circuit variables (current and voltage), not in terms of mag...
by Avian
Thu Apr 02, 2009 11:30 pm UTC
Forum: Science
Topic: inductors and magnetic flux
Replies: 8
Views: 2006

Re: inductors and magnetic flux

Now I'm forced to wonder.. does the total flux N(Fb) mean only the flux produced by the current itself? or is it the net flux through the solenoid from all external sources? (for instance, suppose there is a magnet nearby) Inductance is by definition the quotient between an effect and its cause. Se...
by Avian
Sun Mar 22, 2009 11:33 am UTC
Forum: Science
Topic: Infinite number of elements?
Replies: 27
Views: 4911

Re: Infinite number of elements?

I'm not sure this is evenly remotely possible, but what would happen when you have so many nucleons that the nucleus's diameter is wider than the range of the Strong Force? If I remember correctly the fact that binding energy per nucleon starts to drop after iron is the consequence of the nucleus g...
by Avian
Thu Mar 19, 2009 7:25 am UTC
Forum: Science
Topic: Dimension drive
Replies: 5
Views: 1132

Re: Dimension drive

As for how big they are, nobody knows. I think current theory/experiment actually doesn't rule out them being as large as .1mm, actually, as from what I've heard to really detect them you'd have to test gravity at those levels, which is tough. (Note that that data is probably a few years out of dat...
by Avian
Wed Mar 18, 2009 6:44 pm UTC
Forum: Science
Topic: Dimension drive
Replies: 5
Views: 1132

Dimension drive

I've been daydreaming a bit a few days ago and my though went something like this: I keep reading about theories that try to explain why gravity is so much weaker at short distances than other forces by saying that gravitons can move in extra dimensions. Let's suppose for a moment that they're corre...
by Avian
Mon Mar 09, 2009 12:02 am UTC
Forum: Science
Topic: Are preservatives bad for you?
Replies: 45
Views: 8192

Re: Are preservatives bad for you?

There was an interesting theory, which I can't remember the name of, that posits (and shows) a non-linear dose-response curve at low concentrations. I remember reading this article in NewScientist last summer: http://www.newscientist.com/article/mg19926681.700-when-a-little-poison-is-good-for-you.h...
by Avian
Tue Mar 03, 2009 9:39 am UTC
Forum: Mathematics
Topic: How to solve this? (optimisation problem)
Replies: 3
Views: 679

Re: How to solve this? (optimisation problem)

I have tried to apply a genetic algorithm (using http://www.tablix.org), but it seems my fitness function is a bit off. Tablix should be able to solve this. I have done a similar thing once for a model airplane tournament. Maybe I can help you with the fitness function if you explain what you mean ...
by Avian
Mon Dec 22, 2008 7:24 pm UTC
Forum: Science
Topic: Railgun photo question
Replies: 9
Views: 1566

Re: Railgun photo question

This could also be a plasma armature railgun which essentially has plasma conducting the electricity and this creates a sort of flash. I cannot find a lot of information on these plasma armature one's, but they seem to be considered the best way to produce effective railguns. Hm. Never heard about ...
by Avian
Sat Dec 20, 2008 10:58 pm UTC
Forum: Science
Topic: Railgun photo question
Replies: 9
Views: 1566

Railgun photo question

Hi everyone I just stumbled upon this impressive photograph on Wikipedia of a US navy railgun firing a projectile: http://en.wikipedia.org/wiki/File:Railgun_usnavy_2008.jpg It's apparently taken from a this video: http://www.onr.navy.mil/emrg/electromagnetic-railgun.asp I'm wondering if anyone can h...

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