Information Definition and 999 Threads

I find this whole thing rather ridiculous, his attorney's attitude seems hard to believe. http://news.yahoo.com/s/yblog_thecutline/20101220/tc_yblog_thecutline/assanges-lawyer-wants-investigation-of-leaks-about-assange Although his behavior is more in line with those of a crude and...

During the inflation epoch, the universe expanded faster than c. Does theory allow information during this time to travel faster than c?

What is the greatest theoretical information density? I don't care if you can read the stored information or not. From what I understand, DNA currently holds the record for information density.

Hi Guys, I am in real dellima to take between this course. Obviously I prefer theory but I know my limitation too. Can some one shade between this 2 course which one is really good not interms of employment but interms of knowledge and content. I might decide between this 2 course for my grad...

I was wondering if anyone has tips on retaining information. I already completed Calc I and II, finished both with 93+ and yet 6 months after my Calc II course, I feel like I forgot a great deal of what we were teached. For example, I remember we learned about series in Calc II, such as...

This morning i spotted this paper. The concept of information is hot at the moment. but what is information ?.. http://arxiv.org/abs/1011.5039 Classical Information and Interpretation of Quantum Mechanics Authors: Marcin Ostrowski (Submitted on 23 Nov 2010) Abstract: This work is a...

this may have been discussed before, blame it on bad memory if so. the ability to recall and retain information is fascinating in that as we age our bodies and brain constantly replace and regenerate. so this begs the question? what happens to the information? we can see the locations in the...

hi! Every time i stumble upon quantum physics I get to the same example, where the subatomic particles (photons i suppose) behave like particles in a particle experiment, and waves in a wave experiment. Then the conclusion is that the particle becomes what the observer measures. I'm just...

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 1.13 m. Two of the spheres have a mass of 2.97 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert...

I am wondering if anyone here conversant with information theory could tell me what the difference is in potential information content between 3 dimensions and 4 dimensions.

Does natural selection apply more to information in general than just to genetics?

I am a MaSc student in electrical engineering. In my undergraduate degree I focused on controls and now want to do a thesis on implementing controls other than PID in reactors. I am looking for a good source of information on controls systems in nuclear plants and the modelling and simulation of...

Homework Statement find f from this information f'(x)=ax+b, f(2)=0 Homework Equations The Attempt at a Solution if you integrate f'(x) treating a and b as constants you get f(x)= ax^2/2 + bx and if you substitute f(2) you get 2a+2b. that's all i could get... don't know how you could use...

Given the recent discussion about a possible formulation of holographic principle, and also what geometric notions suchs distance and area may mean without prior metric I thought I'd throw in this suggestive comparasion out for discussion. I feel the discussion is still too much tied to...

I'm looking for a good source of information on electromagnets. Does anyone know a good source?

So a string theory with gravity in anti de Sitter space apparently resolves the black hole information paradox via the adS/CFT correspondence. I'm wondering: is the anti de Sitter space somehow necessary to string theory with gravity? Or is it just because there's this adS/CFT correspondence...

Hello, I am searching for the equipment used in the Youtube/BBC video posted below. I have looked for contact info at Cologne University, but a lot of their sight was not translated over to English. Specifically, I am searching for the barrier used in the video. Also I hope this is the...

The area of the triangle in the attachment has to be found. It is not stated in the question what kind of a triangle it is nor are there any angles given. I believe that there is information that has been left out of the diagram to solve this question (This is a question in a maths...

Here is the problem word for word: Isaaic and Blaise decide to race. They both start at the same position at the same time. Isaaic runs at 2 m/s but decides to take a 2 minute rest stop. Blaise runs at half the speed and still wins by 10 meters. How far did Blaise run? I can use only...

The Information Theory and Cybernetics (Shannon, Wiener) and the perspective of some physicists (Schrödinger) was very influential on the development of Molecular Genetics. The molecular genetic approach showed its power to explain a lot of biological and medical problems, from evolution...

How does information leak out of a black hole ? How is particle and anti-particle created in the Quantum Vaccuum of a Black Hole?!

If I were to have some material, that was rigid, and was also say, 300,000,000 metres long. If I were to poke it at one end, would another observer see an instantaneous response at the other end? Ie, would the information I put into one end of the material travel faster than the speed of light...

Homework Statement I've got a manchester encoded binary data. The question reads, Determine the beginning and end of bit periods (i.e. extract clock infromation and give the data data sequence How do I do this? I think its a simple question but I am having difficult because i don't know...

Suppose there is a person, Joe, who can get a piece of information through research that has a cost to Joe of $2 million. Suppose there are 100 people, and the information is worth $25 thousand to each of them. The question is, how can the 100 people organize to pay Joe what he needs, so they...

Does "The Merck Manual of Medical Information, Home Edition" also prescribe or list some of the medicines which can be useful for the listed disease? Please let me know.

Hi everyone, I'd like to start by saying that I have no background or knowledge of maths other than high school. As a consequence, I have no idea if this question is stupid, trivial, nonsensical or whatever. I also don't even know if it's in the correct thread (I made the best guess I could). So...

I don't understand. Why can't we use quantum entanglement by the means of altering a state of an entangled electron so we can send an instantaneous bit of information to anywhere in the universe infinitely fast by the other electron changing its quantum state? We can can in theory transmit...

What started as a simple project, has become an out of control line of thought and a possible distraction, but one I think is worth picking up again. Several years ago I looked into the cost of solar for my home and the rebate that the city was offering for an approved installation. The cost of...

Is information energy? This thread was inspired by a conversation https://www.physicsforums.com/showthread.php?t=419343". I thought we got a little off topic, but the conversation is worth continuing. The idea seems to stem from http://en.wikipedia.org/wiki/Landauer%27s_principle" that states...

If the cells in our body (including brain cells) are replaced every 7 years, then in a sense we should be completely different individuals than we were 7+ years ago. But to us, we sense the sameness in consciousness throughout our life. How can that be? My belief is that it is the...

I have attached a lecture note which is meant to provide understanding on the following learning outcomes. appreciate the distinction between the macroscopic and microscopic views of matter understand the main qualitative differences between solids liquids and gases at the microscopic...

i was thinking if we could transfer information to energy? what is the nature of information? can it be non-mater? (just bs )

I was curious, please explain to me in an easy way of understanding because I am not the best at picking things up. Thank you.

Let me preface by apologizing if this isn't posted in the correct forum... If it isn't, please point me to the correct forum and I'll gladly re-post. Why is an anomaly like a BH considered a singularity? Why is a BH not considered to be a super massive object existing in our space-time...

Maybe little-bit strange and too specific post. I am trying to find information about this in several forums. Situation: I want to start small manufacturing business. Selfemployment and maybe one or two workers if needed. I want to produce sticky fly paper (in roll, not just board)...

What kind of electromagnetic radiation can carry more information?. I mean, what is the relation between shorter or longer wavelength and the information that can go within. I wonder how the dynamics of this process works, considering that sound waves also can carry information, as well every...

Homework Statement A) Select uniquely decodable codes and instantaneous codes from Code1 to 5 of the image below: B) Personal question about second-order extension probabilites. If we have: probability of a symbol a P(a) = p1 probability of a symbol b P(b) = q1 Which is the...

I got an undergraduate degree in physics years ago, but recently I've been thinking I'd like to try applying to grad school in the next year or two. The subject I'm most interested in studying is quantum computing and more general quantum information science, with an emphasis on the theoretical...

Are there any limits for information transfer through sound or light? Or are these the limits of the devices that send and receive information through these two media. Request for clarification.

Homework Statement Two air track gliders of a mass 300 g and 200 g are moving towards each other in opposite directions with speeds of 50 cm/s and 100cm/s respectively. Take the direction of the more massive glider as positive. A.) determine the velocity of each glider after the collision...

Suppose you have a set of two particles and each of those particles is entangled with another particle in a corresponding set. You could cause wave function collapse of one of the particles to signify a 0 bit, or you could cause collapse of both particles to signify a 1 bit. The configuration on...

A lot has been written about the relative merits of decoherence versus the many-worlds theory in answering the question: where does the extra information go when a superposed state "collapses" to a definite state. However, what about the reverse: when the definite state returns to a new...

Hi, I have a question about the transfer of information at speeds faster than c. I have devised a thought experiment in order to express the logical problem I am having. Suppose you have a string of beads in a tube from here to alpha centauri where each bead in the tube touches the next...

Do you know guys that every satelites have some note that contains all about the Earth and human? It is to inform our information to aliens. And many people tried to infrom human's culture such as music and some great pictures and a lot of languages including English. And I thought...

I've been reading many articles on entangled particles lately and I have come across many pieces of conflicting data. The primary question I have is can any information be transferred between entangled particles, and if so, could we use entanglement as a method of sending information?

Hi PhysicsForums, I'm writing a term paper on the properties of the von Neumann Entropy, its relation to the Shannon Entropy, and the additional complications present in the von Neumann Entropy that are not present in the Shannon Entropy. Could someone direct me to articles and books that...

A friend of mine in the US highlighted a website - www.spokeo.com that is an online phone book but also has pictures that people have posted on their facebook pages, along with their age, education level, profession, credit score (available with membership), members of their household, home...

Pay with angular momentum instead of energy? What do the experts here think of this recent paper? http://arxiv.org/abs/1004.5330v1 In particular can you really change the spin or angular momentum without changing the energy? Would this also apply to ordinary momentum? (Note the authors say...

Hello, I have a state of two registers (A and B) which is in the following form respect to the computational basis: |v> = \frac{1}{N}\sum_{k=0}^{N-1} |k>_A |f(k)>_B I don't know how to prepare this state, it is externally given. I would like to extract the value of f(\hat{x}) for some...

Is there such a concept in information theory? I.e. Something as complex as language can be reduced to 1's and 0's. Is binary the fundamental unit of information?