Information Definition and 999 Threads

hi, this just came into my mind yesterday (while trying to sleep).. i've got a very long, unstretchable ribbon. one end is installed on a plug of laser beam (turned off). the other end is in my hand. the ribbon is 5 light seconds long. what happens, if i pull the ribbon? a) i'd see the...

I'm an undergraduate physics student and I'm looking for a MSc program at a european university (taught in English), related to quantum information, quantum optics etc. Any opinions?

It is said that quantum entanglement cannot transmit information between two points faster than light because the observed states are random. Assuming classical information theory, it's clear that if I measure photon A as 'up', than its entangled partner B must be in state 'down'. A prediction...

A wave packet carries information such that when an observation is made, what is received is information, that reveals spin or position etc. All 'particles' at the quantum level can be described by wave packets and the states of those wave packets could be represented by information. The true...

Given the equation y=x + 1, x=2. Then y=3, I have just clearly specified Exactly where a particle is in 2 dimensions, it is at the location (2,3) in the Cartesian plane. If given the information of where a particle is in 2 dimensions is it possible to find its location in the 3rd dimension?

Hi, I need some good amount of information regarding the types of control surfaces being used to control and maneuver the missiles. i couldn't find this stuff on my own. so, please help me. thanks in anticipation Abhishek

Hey guys, I was looking for this information all over the internet and couldn't find ANYTHING. My question is: What are the inner workings of a blender? Either a traditional blender or a magnetic blender, I'm wondering about the physics behind it and I'm thinking about picking this topic...

OK, well this is probably a pretty basic problem. I understand all of it except for one part. Homework Statement If F(x)=\int^{x}_{0} sin(t)dt, where x \geq 0, what is the maximum value of F? Homework Equations F(x)=\int^{x}_{0} sin(t)dt The Attempt at a Solution...

Homework Statement A man pulls a wooden crate across a floor by a rope. Mass of the crate = 15Kg Force the man pulls with = 65N Acceleration of the box = 20 M/s² What is the angle to the horizontal at which the man pulls the rope. Homework Equations W = Fa Δd cosΘ W = ½mv²...

Homework Statement A block is suspended from two ropes so that it hangs motionless in the air. If the magnitude of T2 is 10N, what is the magnitude of T1? Here is the figure given: See attachment Choices: .5N .866N 10N 17.3N Homework Equations My teacher told me to use trig...

hey, I am in a course that's building special and general relativity with logic and is non mathematical. I have done some E&M before and covered maxwell's equations... the question that I am trying to answer is "what do photons carry information about"? my quick response was the electric...

I wanted to find the Information Entropy (Shannon Entropy) for a given image. I basically wanted to study the effects of image compression on the Shannon entropy for a given image. I am not sure as to how to go about it. To do this, the Message Space is the image itself. Entropy is given as the...

Write a matrix to display the information: x=-10. I'm thinking this matrix would be undefined but I can't remember why I think it should be! Eek!

Here's a question I've had for some time. I imagine that you can transfer information via gravity just as you can with light. For example, if I wave my hand back and forth (in any direction), and you had a sufficiently precise instrument, you could record the movement of my hand from a...

Hi all, I am planning to apply for some REU during the summer of 2009, but since i am an international student, i am facing difficulties finding a programm that accepts international students, and most importantly that offers financial aid to international students, since i cannot afford it...

I wanted to clear my doubt that:- can speed of transmitting information be greater than speed of light? The thing which confuses me is:- If i want to transmit a signal to a place 1 light year away than for it let say i hv a 1 light yr long rigid rod and i push it for sending...

I've been trying to extend Shannon's ideas of classical information to QM, and the way information (as events that we measure) evolves, as it were. Obviously to get information, you have to do work, which is (at least) equivalent to the entropy of the information that's projected, or determined...

Hallo to everybody Next week I will start preparing my graduation thesis on the university. My theme is infrared spectroscopy of diamine complexes, so I am asking you if you can help me in finding this information: 1. structural formulas 2. preparation 3. infrared spectrums for the...

I need help with extracting information from spectroscopic data. Here is the type of question I am trying to understand: We have an energy level expression for the particle-in-a-box, which is En= n2*h2 n=1, 2, 3 . 8mL2 h = Planck’s...

Hi I am currently doing a project looking at the measurment of engine blow-by. Any information about this tha anyone can give me would be most appreciated. In particuar where does the blow-by go when it comes out the crankcase attached to the engine? thanks for your time matt

the decrease of the information v.s. chaos ?? One book about Chaos says that we can use the decrease of the information of the system to define whether the system is chaotic or not. I don't know why and how to do it? If you know about it, can you show it to me, or you can tell me the...

The purpose of this forum is to explain, discuss and disseminate information on cosmology and it does that very well. But there are areas (on this forum or anywhere on the web)that are not covered (that I'm aware of) as well as it might be for those of us who are not as bright nor as well...

Hey guys, I'm working on a project and am looking for some fatigue data for aluminum alloys, A356-T6 in particular. I've looked through the MIL-5 and Aerospace (Cindas) handbooks and haven't found any decent information. The textbook I have "Mechanical Engineering Design" by Shigley and...

i posted this also in general physics, but I'm posting it here as well. sorry if I'm breaking the community rules Well this is not my question, but i thought i would ask this in this forum to find a solution regarding the same. Imagine a very long rod that extends between the Earth and...

Homework Statement In reaching her destination, a backpacker walks with an average velocity of 1.36 m/s, due west. This average velocity results, because she hikes for 5.18 km with an average velocity of 2.05 m/s due west, turns around, and hikes with an average velocity of 0.699 m/s due east...

Is there such a classical scheme? I only know of those which offer security from computationally bounded attacks.

the general solution

Hi all. Been browsing the forums for a while and really like what I have read so far. In my reading I have been on the hunt for any topics or threads involving chem. eng. but have been sadly dissapointed. I really am interested in this area but could not find many threads involving it except...

We are an analogy of fish in the sea, all our information comes from light, forgive me if i am wrong and tell me why, but can we over come (radiation) evidence?

Hi, I was wondering if anybody could point me to where I could find information on neurplasticity? Specifically related to the physiology of it. Internet sources would be great, but I'd be happy to purchase any books if somebody would make a recommendation. :3

I started working out again after a long break, and my muscle fatigue is lasting for days, really destroying my motivation to stick to my schedule. I was just wondering if anyone knew of any legitimate, well-researched nutrition information, supplements, or techniques that I should know of to...

Information is stored in a series of pits on the disc. These pits are scanned by a laser beam. An significant limitation on amount of information that can be stored on a disc is width of laser beam. I knew why the width of laser beam is important coz diffraction effect of loght. How...

Homework Statement I know the definition.where could i find detailed information on unit vectors? Homework Equations The Attempt at a Solution

I present Knit - The new (knowledgeable) http://ca.geocities.com/na2boodie01/KNIT/qkpt.html" . My rules of engagement are for comments and debatable points that reference the material directly or has an impact on the content of the material, otherwise extraneous comments will be interpreted...

Let's say there's a stick, and two persons are holding the extremities: Person A ----------stick---------- Person B Both are pulling the stick with equal forces. At a certain moment, Person B releases it and instantly Person A knows it becase he can now pull the stick to himself. Why...

Im looking for information regarding wind turbines. A 1.5 megawatt turbine rotates at 20 rpm and requires 338 kiloNewton meters of force. A 100 kilowatt turbine rotates at 60 rpm and requires 19.4 kiloNewton meters of force. Both are gearbox driven generators. Is there a formula that is used...

Here is the news: http://www.sciencedaily.com/releases/2008/05/080515092615.htm"

Source: Physorg.com

i need information about ice calorimeter please help me. hi all I need information about ice calorimeter. this is one type of calorimeters. and this is other types:- 1-coffe-cup calorimeter 2-bomb calorimeter. im found inforamtion about coffe-cup and bomb. now ineed...

Hello everyone! I am writing a paper for a final in a basic Cosmology course in college. I chose my topic to be Dark Energy. I am wondering, does anyone here have any good links or sources that I may consult and reference in writing my paper? There is no specific aspect I am focusing on...

Hi, In a superliminal transfer experiment, a pair of entangled photons goes two different ways. You could schedule a time for both parties to test the photon. Photon A goes to an encoder that either detects the photon (binary 0) or let's it alone (binary 1). Photon B arrives at a...

Hey there I do study a textbook at School called Plane Geometry, it is about 3d dimensional figures, it starts with explaining Planes, points and lines, then It starts with theories, then I have to prove something like a line perpendicular to a plane and things like that. I googled Plane...

What if there is no hawking radiation i.e if it is not proved..i think it is not yet proved...so will it have any influence on information loss paradox..if there is no hawking radiation then the information would be inside black hole and not accessible..so there is no information loss paradox if...

I’m in a conundrum. I’m trying to reflect the diffuser aspects of a formula one car for a computer game. The game requires that I indicate the x-y-z coordinates which would represent a central location of the force that a diffuser system creates. Now, I’m absolutely not an engineer, so I have...

Hey folks, I have a pretty simple quantum information question that I was hoping somebody could answer. let's say I have a pure state \ket{\psi} = \alpha \ket{10} + \beta \ket{11} + \gamma \ket{01} + \theta \ket{00}. I then perform a measurement on only the first qubit and observe a...

can someone explain information loss paradox in layman terms without using any quantum physics terms...i read in some sites but i couldn't understand as they are explaining using some jargon terms...

I've recently started a mini project on typical doses that patients receive when having particular CT examinations and there is just something that I don't really understand that I was hoping someone here might be able to help out with. Now when a doctor takes some CT images the CT machine...

Agree or not i think we need more information, so what space exploration would you support?

Hi there, Let me start by introducing myself. I am a student who considers himself to be a very scientific thinker, that is to say, not one who believes in mystical thinking, but I am not studying physics. I am trying to learn more about this for my own edification (and I will try to be a...

I am in college and have no formal training in physics, but i really enjoy the field. I was reading about redshift and am currently stumped in regards to its relation to light. I have read that light is constant, but in redshift the wavelengths of the light lengthen. I was wondering if light is...