Information Definition and 999 Threads

I can't find any info on this type of A26.. can anyone help me out? Thanks in advance!

Homework Statement What is the lattice energy of LiI? Given the information below. Heat of formation for LiI = -270 kJ/mol Heat of sublimation for Li = 159.40 kJ/mol Ionization energy for Li = 520 kJ/mol Bond dissociation energy for I2 = 149 kJ/mol Electron affinity for I = -...

My question uses this definition of information: - An intangible and dimensionless thing that is not energy nor matter. - Can be an arrangement of matter (a typed/printed letter on a page) or a pattern of energy over time (music on the radio). I hear physicists talk about "information"...

Homework Statement The marketing department of a magazine collects the following information for a group of randomly selected subscribers. Of households that subscribe to at least one of their three magazines: 25 subscribe to teen world only 19 to star watch only 15 to fashionz only 41...

I have heard many times in those PBS or BBC dumbed-down-science-for-ordinary-dolts shows (unfortunately they're the only sources of this sort of information I have) that there was a black hole paradox at one point, wherein some people were deeply concerned over whether black holes destroy...

http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/FTL.html#3 But it didn't explain why. I just don't get it, let's say the spot travels from A to B, why can't I say some information travels from A to B, for example the shape of the spot?

I'm writing my senior thesis on the r-process, and having a lot of trouble gathering information because my only sources are professional papers (which are clearly not written with an undergraduate understanding in mind). Can anyone recommend a text that explains the rapid neutron capture...

Having just read Barak Obama's proclamation on National Information Literacy Awareness Month, 2009, I feel like a total loser. I've been completely illiterate when it came to knowing there was any such thing as National Information Literacy Awareness Month. Worse yet, I didn't even find out it...

I'm trying to find grad schools to apply to, and I'm particularly interested in universities with strong programs in quantum information science/quantum optics/quantum computing (what each university calls it seems to change depending on who's funding it). I haven't gotten my physics subject...

Homework Statement I have dutifully reproduced the problem in OODraw please forgive the poor aesthetic quality but I believe all the important information is visible. Homework Equations mgL-Lsin(\theta)m'g = \frac{mv^2}{2} + \frac{m'v'^2}{2} T=T' v=v' \therefore v^2 =...

Hi all, I have photometry from a number of sources with only very sparse details about the observing conditions at the time. The only information I have is the date, the filter and the longitude & latitude of the observer. Is there any program or website on which one can enter any...

I was reading an article about retrieving information from black holes when I came up with an idea. Please bear with me, as I am not a scientist (or even close) and know little physics vocabulary. A theory/hypothesis I read involves Hawking radiation retrieving information from the black...

Hello everyone. I have become very interested in how the brain works recently. I know that in sleep, your brain is basically going through all of the information that it has obtained, and sorts through it (decides what is/is not important, and strengthens/weakens those connections). But...

Ok my question has to do with a thought experiment which seems to allow faster than light transfer of information. I'm sure there is a problem with it...I just can't seem to figure out what that problem is...so I thought you guys could help. First you build a sort of telegraph system that...

Can someone give me either an explanation or a link to explain why tunneling cannot carry information greater than the speed of light? I understand why entanglement cannot, but this is not the same thing

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...

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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...

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...