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Massive Update on Strings Theory in Wikipedia
S3D writes "There is a massive update on Strings Theory in Wikipedia :
AdS/CFT
, Andrew Strominger
, Cumrun Vafa, Ashoke Sen, Juan Maldacena,
Mirror symmetry,
String field theory,
Holonomy,
Heterotic string,
Closed string
, Open string,
F-theory,
Background independence,
Higgs mechanism,
Conifold,
Tachyon_condensation,
Einsteinian_manifold,
Second superstring_revolution
Now you can easyly tell Open string from Closed string
at last."
why there is a wiki entry if its only a theory... sheesh, flat earth is a theory
All of science is "only a theory". (Yes, to Americans who still believe what they learned at school - no, theories don't "promote to Law" at some point. They stay theories regardless of what they're named). That's what science deals with.
Now superstring theory is a bit different, since as far as I know they haven't actually had any predictions yet that can be tested, they aren't really "connected to reality". In a way they're now a really complex collection of math that has yet to become a theory.
But of course, regardless of all that, there's a huge body of knowledge, terms, specialist language etc that needs to be explained to people who want to know what they mean. And that's what encyclopedias are for, you know. Just that they explain what "open string" means in superstring theory doesn't mean they're saying "this here is the only truth". They're not making any statement about the likely success of this theory at all They just explain the sort of ideas it deals with.
Sheesh.
I believe posters are recognized by their sig. So I made one.
Wikipedia is getting new knowledge all the time. If you really want to find out what's new, just visit here. I don't understand why new Wikipedia entries are meaningful stories for slashdot.
For every problem, there is at least one solution that is simple, neat, and wrong.
Flat Earth
Here is another Indian fellow. Amazing to see them from NASA to all top technical US universities to Microsoft to IBM to Oracle to Medical industry to hotel industry and there are just about a million of them in the country... And you thought they only are cheap labor. You would be surpised if you start looking at the top research institutions in the country. They are everywhere.... This might seem like a flamebait but most of IT guys think of them as cheap labor which in not necessarily true since they are involved in a lot of top research to silicon valley startups...
Most of the links are to stubs, this really isn't a massive update. Wake me when someone who knows what he's talking about adds some real (useful/readable) information on these theories.
This sig is intentionally left blank
>(Yes, to Americans who still believe what they learned
>at school - no, theories don't "promote to Law" at
>some point. They stay theories regardless of what
>they're named)
Another note to Americans. We are not all a bunch of jackasses like this guy.
This diversity of opinion, along with its inexorable and accelerating content growth suggest that Wikipedia, or some similar successor, just may become the standard reference of the earlh 21st century.
The world will not get better through technology. We must seek to be better people.
Must be the highest link-to-word-ratio I've seen in a long time.
--> Insert Funny Sig Here
Well, positing that tachyons are "really there" probably ought to get you labelled as somewhat misinformed. But as the wikipedia entry explains, there are (mathematical) situations where you end up with fields with imaginary mass (tachyons). You invoke symmetry breaking, fix a gauge, and your previously imaginary masses suddenly become real. No more tachyons - the tachyon field has "condensed" into a real-valued field.
As far as I know, anyone who talks about tachyons as physical particles which we might use to construct warp drives or build a better mousetrap, is venturing into crackpot domain. The word does have a useful meaning in particle theory, which is indicated by the last paragraph of the entry. I'll give it a go, but this may not be helpful - it's unfortunately rather technical and abstract. Imagine you're trying to see how some particle (field) behaves. You can sum up a lot of the field's properties by a potential energy function. This can be a crazy function with lots of peaks and valleys in it, and what it tells you is how much energy it costs for the field to be in a given state. Usually, the field chooses to sit in the minimum energy state possible - the "ground state", the deepest of the valleys. If you "kick" the field with some kind of interaction, it will go into oscillations rolling around the bottom of the valley. These excitations are what we call particles. (Sorry, I said it was technical and abstract). A tachyon occurs when you made a mistake of sorts in your work - you picked the ground state to be at a peak rather than a valley. So the field value is such that you are perched atop one of these peaks. It turns out this would seem to correspond to a bizzare particle called a tachyon - a particle for which the square of its mass is negative (since the potential function is curving down instead of up). This isn't a real particle, though - if you "kick" the field when it's in that state, it won't oscillate normally to give particle states - it will roll off the peak and into a valley. This often happens when you spontaneously break a symmetry of your theory. Imagine your potential function looked like the letter "W". You might choose your ground state to be the one with left/right symmetry, but then you'd be on the peak of the W - you'd eventually roll off to the left or right and break the symmetry. The take-home message is that the tachyon state isn't a real particle, it's an unstable situation that is an indication that you picked the wrong ground state. I think that in the early days of particle physics people didn't understand this kind of thing so well and thought tachyon particles might actually exist. Sorry if I can't figure out how to make that much clearer.
This could be solved with one entry:
Closed String: Contiguously allocated memory ending with 0x00 ('\0', 0, 0b00000000, etc)
Open String: Contigously allocated memory without a terminator (see also Closed String, Buffer Overflow)
-Adam
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DON'T PANIC
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on the cover. So much more comforting...
I must admit though, wikipedia definately gives the guide a run for its money!
click-clack, front and back. I'm not moving this car otherwise.
I believe you mean "flat earth is a hypothesis". Theories are statements that are presumably true and have not been demonstrated false. Hypotheses, on the other hand, are just conjectures, and hold no weight beyond was the conjecturer gives them. A flat earth has been demonstrated false, so it is merely a hypothesis in the minds of those who choose to entertain it.
WeRelate.org - wiki-based genealogy
Oh, good. Now I have more material for my light evening reading sessions.
Quidquid latine dictum sit, altum sonatur.
All of science is "only a theory". (Yes, to Americans who still believe what they learned at school - no, theories don't "promote to Law" at some point. They stay theories regardless of what they're named).
Ah good. Then nobody will mind that I just float around now that we know gravity is simply a theory?
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