Theories Definition and 457 Threads

Anyone know any cool new theories about time travel?

Heya, I am writing a paper at the moment on aether theories from an historical perspective. I am mostly interested in the mathematical basis of aether theories starting from when Maxwell unified electric and magnetic fields. What I would like to know is if anybody has any idea where to...

Here I'd like to present theories of professor of physico-chemistry, Ph.D. Najip Valitov from Russia, who discovered new theories after Einstein. Part of his discoveries are described in his web-page: [PLAIN]www.bashedu.ru/ValitovNKH.htm[/URL] In 1972 professor Valitov, who lived in the...

in all the failure theory we compare the stress in the structure to the yield stress in the uniaxial testing. How this is valid? for example in a structure the max normal stress is sigma x. and we compare this with the maximum normal stress in a uniaxial tension test. in vonmises also...

Does anyone know of any comprehesive sites featuring ALL of the following: the Keynesian theory, Monetarist theory, and the Rational Expectations theory? Any ones that compare/contrast them would be excellent. Thanks again.

http://www.scifiscience.co.uk/index.htm From Astronuc. This gives a very brief introduction to Relativity, Chaos, and Superstring Theories, and a few other Sci-Fi Science concepts.

http://xxx.sf.nchc.gov.tw/pdf/hep-ex/0503034 This paper is a review of anti hydrogen production, and how it could be used to test gravity theories.

This is my (limited) understanding of particle physics: In particle physics gauge symmetries play an important role. To allow for massive gauge bosons this symmetry is broken. The theory of weak interactions can be derived from a local SU(2) symmetry, and quantumchromodynamics from a local SU(3)...

some theorist predicts proton can decay, since the decay of proton does not violate any fundemantal conservation law. My question is, could neutrino decay? How come I have never heard of anyone say neutrino could decay?

I am looking to learn about the major flaws with our current theories and data on climate change, particularly in terms of the ice ages. Any examples of inconsistencies or problems with data, or any other information you could give me would be much appreciated. Thanks, Matt.

From John Baez’ page on the experimental basis of Special Relativity, he says that: and My question pertains to the remarks in blue: aether theories that are experimentally indistinguishable from SR. Where are these theories published? One member (Yogi) makes reference to the so-called...

I've been attending at high school and I have some ideas about complex numbers. I shared my thoughts with my math teacher. He decided to search. I want to make sure if none have thought them so I need some information about complex numbers. Could you offer me some written sources and the...

well there are many stories of human beings being able to do things that we would only think are in our favorite comic books but let's focus on walking on water. from jesus to the monk of tibet, there are lots of stories about human beings walking on water, so is there any theory as to how this...

I've often read that quantum mechanics and relativity theory are logically incompatible theories, meaning that both theories cannot be true. Can anyone use mathematics to prove that? Thanks, King

If a galaxy is 1 billion light year far from us and if for us big bang did happen 13 billion years ago then when it did happen for that galaxy ? Pure guess will predict the answer 12 billion years, but what the observer on that galaxy will say about us ? will not he predict that we are...

Greetings , my friends! Haven't asked that question in public before but for now I thought it might be beneficial to do so since You guys know stuff around here. What do to if You've came to a some kind of science theory? ...new therorem in maths , law in physics or alike which seems...

Which, if any, of Einsteins models and theories have been replaced by more advanced or precise ones? The only thing that comes to mind was Einstein's "greatest blunder", the cosmological constant. But hasn't that even found its was back into the equations? Thanks, Glenn

"Planck scale Lorentz-symmetry test theories" Amelino-Camelia new paper by Giovanni A-C http://arxiv.org/abs/astro-ph/0410076

hello, from sometime in past i was in contact of the string theories. But one thing that clicked in my mind that how does the physicst started the idea of the string theories (all of them) like Newton formulated the law of gravitational force after he observed the motion of the moon...

Could someone rephrase in a short and casual manner the famous Millenium Problem of the Clay Math institute ? http://www.claymath.org/millennium/Yang-Mills_Theory/ Thank you for help !

An interesting observation I made while in chemistry lab was that volatile liquids follow a type of "relativity theory." Imagine temperature (T) as the speed of light (C) in this thought experiment. So, as the heated water approaches T>100 degrees Celsius, the water converts to another state...

Items in a data set or group are divided into pairs with specific relationships between each pair. In this way a degree of order is introduced into the set. I understand this can be done with the entire universe but where do I find out more?? Any suggestions would be helpful.

Any suggestions on where I can find general descriptions of relational theories please?

Steven Hawking's / MKaku. Who's right about Black Holes? Does Prof. Steven Hawking's revised Theory of Black Holes rule out the existence of parallel universes? What about the Two Big Bang Theory by Dr. Raj Baldev, what implications does this theory have for M Theory.

Can a rank 2 field be considered, in principle, to be the dot product of two rank 1 vector fields?

I find discussing the beginning and continuation of the universe one of the more interesting aspects of physics. Also the fact nobody really has any concrete proof as to much of where the universe is going, its boundaries, its expansion. a lot of people have their own ideas or beliefs, and i'd...

i'm interested in any alternative theories re: dark matter...is it possible that we simply have misunderstood gravity at these distances? it seems strange to me that we look for symmetry in the physical laws and so we see something we can't explain using the law of gravitation and our...

Can someone please explain to me the current theories of Time? I have an idea I want to put forward to you all, but need to get a little groundwork in first. Based purely on what I learned in school, time is currently veiwed as linear, if so, how is this even possible? Much appreciated, thanks.

how are quantum theories applied to everyday life? in the physical, biological and chemical systems? like how does quantum theory explains the existence of parallel realities or universe?

Hi. Could someone please post a quick summary of which string theories are out there and how they relate to each other? I could only find partial information on this... Thank you.

So don't be surprised if it's crap.In fact I know it's crap,I just need proper physics people to confirm it's crapness. :redface: Think of a hollow cylinder.There are springs on the bottom and top surfaces of the cylinder,meaning that if a ball was inside it would bounce back and forth.It is...

Gravity Probe B is due to be launched on Monday, 19 April, 2004. Many years in development, it is intended to provide good tests of "two extraordinary, unverified predictions of Albert Einstein's general theory of relativity." Many posters to PF have difficulties with GR; several have...

Hi, India rarely helps scientific advancement. Recently this country has made some wonderful advances in the field of missile technology and information technoloy. Their recognition has become strong now. Indians are now more popular in American due to outsourcing issue. Similarly some...

Is it strange that there are exactly the same number of superstring theories as there are known quarks?

Bell thought that maybe non-local hidden variable theories might have something to say, even though local hidden variable theories have been shown to be unable to properly describe nature. well, what exactly would you mean by a non local hidden variable theory? where exactly does the...

anyone familiar with this place in florida and the theories on magnetism the man whou built it espoused? http://www.fortunecity.com/greenfield/bp/16/coralcastle.htm

--------------------------------------------------------------------- References: 1) Green M., Schwarz J., Witten E., Superstring Theory Vol. 1,2, Cambridge Univ. Press, 1987 2) S.Klimenko, V.Talanov, I.Nikitin ``Singularities on the world sheets of open relativistic strings'', Preprint...

I am writing a paper on the Theory of Everything, and it's effect on mankind. I was wondering, how do you think the public would react if a theory of everything was discovered? How would the public accept a theory such as this (so large scale)? How would society change in general...

Meh, nobody looked.

I want to know how many Calabi-Yau manifolds there are in each of the 5 superstring theories. Can you point me in the right direction?

not really philisophical more pyscological but anyone got any theories on why we fear death? isn't it supposed to be the solution to our pain? I've got my theorieso n it but i want to hear others...

Karl Popper asserted, in brief, that all theories are eventually falsifiable. What of a theory (quantum mechanics?) that embodies probabilities such that its truth and falsity are apparent a priori (a violation of Goedel's logic?) If probabilistic theories are proved necessarily falsifiable...

Hi people. I have decided to go ahead with this on my own if no one helps me (nudge nudge, if anyone wants to help out on a rather large project, then feel free to email/PM me . Primarily my major concerns are webdesign, and possibly marketing/advertising aspects.) Anyway, the idea which I...

As theories go, here's something new. A very simple foundation theory based on Energy, with free software to back it up. http://www.gamert.co.uk

Hey guys! I was wondering, where could i find elucidating Physics books on String theories, quantum mechanics (QED, QCD, QFT, LQG, etc) and all related on the web? I've done some search, but all i could come up with was an electronics and engineering related forums, and that is not in my...

all theories in physics are incorrect ! yes that's right. because 100% percent of the theories are using; approximations, incorrect perturbations, assumptions and so on. that is not valid for the behaviour of nature. physics is a kind of battle to understand the nature not to modify it...

Are we so certain of dimensional fields as expressed in recent theories? true we know of three for certain, but can it be possible the 10 or 11 maybe even more dimensions are mirroring the 3 principle dimensions?

do string theories need gravitational radiation as in GR?

i can not seem to find any good or relevant information on the five different string theories and how they differ from one another. i know of, and to the best of my ability try to understand 'basic' M-theory but am very strapped for info on the other theories and their specifics. if some one...

I didn't know whether to put this one in maths or physics, but I'm interested on what people on PFs think are the consequences of Goedel's first incomplteness theorum are for physical theories in general and in particular for the idea of a single comphrehensive theory that can describe all...