Information Definition and 999 Threads

need urgent information Dear All, Can anyone inform me the following things on urgent basis ? - The crystal structure of Bi2Te3 is Rhombohedral or Hexagonal ? - How can I calculate the grain size from the XRD data/curve for Bi2Te3 ? - how to calculate the lattice parameter of Bi2Te3...

need urgent information Dear All, Can anyone inform me the following things on urgent basis ? - The crystal structure of Bi2Te3 is Rhombohedral or Hexagonal ? - How can I calculate the grain size from the XRD data/curve for Bi2Te3 ? - how to calculate the lattice parameter of Bi2Te3...

Hi Guys, its my first post here and I have a feeling that I'll be using this forum as a resource. Maybe once I learn enough I'll be able to contribute in solving other peoples' homework problems. Anyway, to the problem: Homework Statement A commuter train travels between two downtown...

Hello all, I have been thinking of a way to prove divergence of a sequence that should work, but can't move past one road block. Here's the idea, given a sequence a_n, say that i know for any consecutive numbers in the sequence, |a_(n+1) - a_(n)| > d, where d is a constant. Now this...

please explain how computers can take the words entered on a keyboard and translate them into digital information?

Homework Statement A n object with mass 5e23 kg travels around a star in a nearly circular orbit in the xy plane. Its speed is nearly constant at 4.1e4 m/s. Diagram accompanying the question http://img197.imageshack.us/img197/7682/68232428.jpg It asks to find the momentum at point D and also...

Does anybody have a good book/website where I can find good information on how to use the maximum on matrices. I have to prove an expression involving the maximum and eigenvalue of matrices. But I don't know how to link those to together. I think I can figure this out, if only I had some good...

Hello guys, my name is Danny and I am a mechanical engineer going through my undergrad and i have a question. Right now I am still doing my lower division courses and one of the things i need to do is to write a paper about ceramic brakes and the manufacturing process. So far I have borrowed a...

In his book THE BLACK HOLE WAR, 2008, Leonard Susskind makes the following comments around page 135-137: In the following he happens to be referring to a Planck scale cube...let's ignore that specific geometric shape... (Later in the book of course he describes his holographic...

Hardware & Software News/Articles ---------------------------- Anandtech Welcome to AnandTech, the leading IT source for hardware analysis and industry news. http://www.anandtech.com/ ExtremeTech ExtremeTech provides deep technical content about new products and technologies...

Hi, I have a square grid that represents a landscape, each grid cell is forested or non-forested. I am calculating 2 different forest fragmentation metrics. Because there is a finite number of combinations of forest and nonforest cells, there is a finite number of possible values for each...

I'm getting myself up to speed on GR to try to understand a book by John Moffat called "Reinventing Gravity...". So far I've been using Sean Carroll's sort of classic course notes and a fair bit of Wikipediea (sp?). It may be a naive question, but the point I wouldn't mind comments on is the...

Hi, I have a square grid that represents a landscape, each grid cell is forested or non-forested. I am calculating 2 different forest fragmentation metrics. Because there is a finite number of combinations of forest and nonforest cells, there is a finite number of possible values for each...

All of the data one has relative to the Internet, such as passwords/usernames to sites, bookmarks, history, and all the so forth are stored on the computer, right? Therefore, if another user uses the same internet connection line (port, router, etc...) with another computer (his/her own...

I would like to ask for a piece of advice on references on following issue: Any (macroscopic) bifurcation of dynamical system generates some new information (or loss of information). In particular, when the dynamical system is loosing stability (i.e. stable equilibria becomes unstable) some new...

why is there a lack of accuracy in this subsitution? \frac{sin\phi}{cos\phi} = tan\phi

What's your Age? How about the Age of Consciousness? When we respectfully acknowledge all sentient life. When artificial life and physics in general become indistinguishable from biology. When all of our thoughts are self-determined. When science allows awareness beyond immediate...

Is there some place or some website where it will collect and post the information of international physics conferences or symposiums like MG12, loops09 etc. ? Thx!

What is the resolution of the black hole information paradox? According to quantum theory, information — whether it describes the velocity of a particle or the precise manner in which ink marks or pixels are arranged on a document — cannot disappear from the universe. But the physicists Kip...

I would like to compute the power distribution that maximizes the sum data rate of a certain communication scheme. The expression follows from the sum of the rate of four messages which interfere with each other. A certain amount of power (here 1 Watt) is assigned to these messages, and there is...

This question is about the relationship between information, entropy and heat. I think it was in the 1970's the Hawking claimed "information is lost in black hole evaporation". This did not mean it was just inaccessible, but that it has literally disappeared, gone forever. In the Black...

Suppose a physical quantity needs to be represented in pictorial form...for example distance. Such value represented should have 3 parts - 1)Orientation - Or the angle that it makes to the axes of the Cartesian coordinate system under which things are being observed. In the 2 images below...

it takes light about 8 minutes to reach Earth from the sun, and I've heard it said information cannot be transmitted faster than the speed of light. if the sun blinked out of existence, steady stream of light indicating to you the the sun still exists would last for 8 minutes, but could you not...

Hello there my fellow physics fact finders, As the title suggests, I was wondering if we use infrared and radio waves to communicate information because they're the only waves that can carry information, or just because they're the safest. Which actually brings me on to another question, how...

When someone asks the question why can some stuff go faster than c, they get the answer that "it's not a transfer of information- special relativity says that no INFORMATION can travel faster than light." Why don't processes such as phase velocity and entangelment transmit information? What...

I want to be a physics major and I am very interested Astrophysics as a final career path. However recently, after reading a few books about it I have become interested in Information Theory and the prospect of Quantum Computers. I have a very strong Math, Physics, and Computer Science...

Which of the following means of communications is it safe to transmit sensitive data such as a credit card number or a social security number through: 1) cell phone 2) landline phone 3) fax 4) snail mail ? I have been trying to use google to get an answer to this question, but that did...

Here's what for me was a fascinating (and straight forward) description of How Jacob Beckenstein concluded information is displayed on the horizon of the black hole. The formulas are so simple and the results so profound I wanted to post them here...I'd never seen this before... This is...

From what I think, any physical value has at most 3 parts - 1)Orientation - Or more explicitly, the angle that it makes with axis of the Cartesian coordinate system. Transforming will not change this value. 2) Position - This is the translational stuff...exactly from which point to which...

Let's suppose I have a speech signal with frequency content >300 Hz. I then add noise to this signal, that happens to be somewhere below 300 Hz. I then high-pass filter the signal (300+ Hz) and I have increased the mutual information and seemingly violated the data processing inequality. Can...

Does anyone know of work on the philosophy of information? I am thinking along the lines of on abstraction and the related question about reality especially of mathematics? Kant was wrong, Plato not deep enough, Wittgenstein wants to make it a language problem. There must be something more current.

Right guys i am on my 3rd year at uni doing computer network management & design, i have passed everything apart from network design and I am having to take a resit. I don't understand information theory AT ALL. They went over it in class but made no sense, i also asked the tutor to...

Hello everyone, I'm trying to put together a computer program that will convert codes into sounds that can be quickly and accurately picked up by the human ear. For instance, it needs to take "0048" and turn that into a sound, that will be different from "0049" or "1148", and a person...

just likes radios and such. i had a brief discussion with my math teacher on the subject, my math teacher was an electonical engineer at Bell Laboratories for 10 years, and i asked if its possible with radio, can't it be done with any light? He said yes. what i didnt ask him was, how exactly it...

Hey guys, Got this question for a small essay: "Explain how observations of electron impact ionization scattering from inert gas atoms provide information on the interaction potential, the electron momentum distributions of the electronic shells of the atom and the angular momentum of the...

http://arxiv.org/abs/0905.2292 A new physical principle: Information Causality Authors: M. Pawlowski, T. Paterek, D. Kaszlikowski, V. Scarani, A. Winter, M. Zukowski (Submitted on 14 May 2009) Abstract: Quantum physics exhibits many remarkable features. For example, it gives...

Hey- I've read these forums for a couple of months, I'm sort of a nerd, so i enjoy working out problems even if i never post solutions to them. :). Anyways, I do have a question. I was wondering about the difference between masters and PhD programs in physics and mathematics. I've heard...

I have 3 questions regarding BM 1. Trans-plankian problem Let’s roll all processes back in time from the God’s view (so we see all BM particles and their trajectories are not hidden to us). Like any single-history deterministic theory in BM the future is ‘encoded’ in the past, so, the deeper...

I was curious if, when someone dies, are the informetion, such as memories, stored in the brain lost? Is it possible to extract that information without somehow bringing life back into the person?

Help with STL container list for INformation Manager! I'm trying to create a info manager like rolodex. Rolodex.cpp List() function void Rolodex::List() { list<string>::iterator cIterator; for (cIterator = cardlist.begin(); cIterator != cardlist.end(); ++cIterator) {...

Can anyone point me in the direction of good information on magnet's, magnetic energy, magnetic forces. Or does anybody have a good understanding of this? Would really like to find somewhere that I can order magnets. Or better yet, make good one's myself, or find out how to find rare Earth...

Dose our DNA contain all the old information of the species that our species came from? For example, do we still contain the old DNA of the first mammals, or the reptiles that evolved into the first mammals?

http://arxiv.org/abs/0903.4315 The role of information in gravity Authors: M. Spaans (Submitted on 25 Mar 2009) Abstract: It is argued that particle-specific information on energy-momentum affects the strength of gravity. This form of gravity has no free parameters, preserves...

can information be transmitted faster than c in inflationary cosmology where with a large positive cosmological constant, space is itself expanding in an exponential faster than c manner?

This question might rather be posted in Biology but since the information paradox is usually the subject of black hole physics I thought physicists may be better placed to answer it. The fact that information may be lost in black holes is considered a paradox, information is believed to be...

Hello, I was wondering how I could express a geometric quantity which has only magnitude and direction but no orientation (sense)? and perform ordinary operation on that. For example: it is clear that a vector is not appropriate because vectors with same magnitude-direction but opposite...

The other day I learned that my bank canceled my debit card. After talking to several people on the phone I was able to find out rather little about what happened. Apparently some merchant or investigative agency contacted my bank to tell them that my card information may have been...

Usually in information theory (at least the introductory version I have learned) one is concerned with the amount of information transmitted over a single channel, from point A to point B. Suppose that this is generalized to a Bayesian network, where each directed edge of the network is viewed...

I understand how a baud rate can be set by a clock and the data can be shifted through a line. Both sides need a clock to keep in sync. How would this be achieved if you are using wireless. Would both sides need to communicate back and forth because I can't see how a clock could be set on...

Right now I'm majoring for a BS in Information Technology at a 4-year university. This is kind of a risky major since it's new and pretty much a watered down version of Computer Science, I think. Anyway, I'm not sure where I want to go with my career. There are many branches to take in IT like...