Information Definition and 999 Threads

Attached the problem. The TA for my class makes up all the damn homework problems, but she has a habit of leaving out important information on every single homework assignment. Sorry for the rant, just had to vent a bit. Unless they want all this in variables, I don't see a way to get a # for...

Hi guys, I need to do a project for college Does anyone know where I can find information on the Wireless Networking abilities of my laptop? Can some be found in the control panel? Can I find some online? Any help would be greatly appreciated. Thanks!

Hi. Metric and electromagnetic field outside BH are determined by mass, angular momentum and charge of BH. Does this imply that information of the values of the three parameters come from BH through event horizon? Is it possible? Regards.

How would I solve this? 2 police officers are standing on a road. A motorist comes at 108km/hr(30m/s) The police take 2 s to assess the situation. Then their patrol car accelerates at 2.5m/s^2 for 15s after the 2s and then continues at uniform speed. How far from the observation point does...

Hi everybody. I have always wondered something and have not been able to get an answer. Let us suppose we have a 300.000 km long straight rod. It is of graphene, or any very tough material, of absoulte stiffness, without any displacement or absorption between its molecules. Parallel to the rod...

I am trying to get my head round this problem but not having studied it I need some help.

Can somebody help me out here. The gravity of a black hole is so strong that nothing can escape it, not even light. If that's the case, why can't another black hole of larger mass be used to extract information from the first black hole? Sort of like how a Siphon works. I imagine some sort...

Hello, I am wondering, from a pedagogical point of view, would professors give as little information to the student's. What I mean is, what is the point of deriving a bunch of equations during lecture, and then giving problems not related to a derivation of an equation on the test. I mean...

Hello, I'm trying to calculate Fisher information (and eventually the Cramer-Rao lower bound) for this particular pdf with Mathematica: \text{pte}[t,\Theta ] = \frac{P_{\text{ec}}}{\tau _d-\tau _r}\left[e^{\frac{-(t-\Theta )}{\tau _d}}-e^{\frac{-(t-\Theta )}{\tau _r}}\right]...

I'm sorry that this is probably in the wrong place, but I couldn't find a place to post where I am allowed to start threads which was relevant. I'm hopefully starting a degree in particle physics next year, I'm currently in my last year of high school. Myself and one other student at my...

please i need urgent help please -- Balun information i not not understand how to wound a balum and also the function of a can someone please explain this circuit it is suppose to be a 500m FM transmitter can it perform this function.

In Particle Data Group booklet, many refined determinations of the masses and decay widths processes are collected and listed in a fabulous way. But it is still (at least for me) to find the sources of these Data, I mean from which experiments, FOCUS, or BELLE..., are taken? is there other...

I will finish my Master studies in theoretical physics next year, and I want to do a PHD in Quantum Information (my main interest). I want to apply to universities in the UK and Germany (right now I restrict myself to these two countries). What are the universities you know of, that have Quantum...

The Bekenstein-Hawking entropy is expected to be, and has been shown to be in some cases, derived from counting states. However, entropy is not defined for continuous probability densities, and so I have heard it said that relative entropy (of which the mutual information is a form) is more...

I don't know if I got this right, but as far as I know, if you are able to deduce through which slit the particle went through, it behaves classically, if you have no way of deducing through which slit the particle went through, it behaves in a quantum way (interference pattern). Now, I don't...

So, let's think of a world where all the decisions are made by probability, e.g. flipping a coin, and quantum physics was never discovered. Now, let's say they use a device, a contained version of the double slit experiment, except that the particles are supposed to land in one of two...

I don't understand the following step regarding the (i,j)^{th} element of the Fisher Information Matrix, \textbf{J}: J_{ij}\triangleq\mathcal{E}\left\{ \frac{\partial}{\partial\theta_{i}}L_{\textbf{x}}(\textbf{θ})\frac{\partial}{\partial\theta_{j}} L_{\mathbf{x}}(\textbf{θ})\right\} \\...

Hi I have a histogram of some numbers following a PDF, such as Histogram[RandomReal[1, 100]] What I want is to extract the information contained in this histogram in a list, i.e. get a list of the bin value (e.g. the average value it represents) and the number of entries in it. Is using...

(1)CSE(computer science and engineering) (2)ECE(electronics and communication engineering) (3)EEE(electrical and electronics engineering) (4) EE(electrical engineering) (5) SE(software engineering) (6) IT(information technology) what is basic thing that is different in all these trades...

The wavefunction is defined on the domain of complex numbers. To find the probability of discovering a particle in a certain region, the amplitude of the wavefunction is integrated over that region. The problem is that you have an infinite set of complex numbers mapping to a single amplitude...

hello friends...i am facing difficulties in understanding the difference between live type and deadtpe current transformer...and also the advantage of live type over dead type?

why can information not be transmitted via phase velocity (of a matter wave)? can we not change the phase at will?

I doing some reading on why the wave-function is complex. From what I can tell, it's due to its evolution by unitary operators. But unitary operators seem to have something to do with information conservation. So I wonder if these idea have been developed somewhere in a concise fashion that...

Why is |<{\phi}|exp(i{\alpha}|{\psi}>|^2 for any alpha not dependent on choice of alpha, but |<phi | exp(i\alpha) \psi >|^2 is dependent on choice of alpha. Also, is there a list somewhere for how to type this garbage on physics forums; I'm used to using TeX maker for writing math, but I always...

Is there a conservation of information law? I am particularly interested in the arguments (speculative and experimentally based) that may support a conservation of information law, but need to know the arguments on both sides.

Here's a leaflet which was distributed over Germany and Poland, apparently during the year 1944 (as it refers to the drop tanks which would have been regular equipment aboard the P-51 Mustang long-range escort fighters then being fielded by the 8th Air Force), by the National Socialist...

"Information field" giving rise to quantum mechanics. Hello. I stumbled upon a video on youtube where quantum entanglement is discussed (). A woman quotes Einstein: "There is no place in this new kind of physics for the field and matter, for the field is the only reality." What did Einstein...

Question is pretty simple and arose when doing one of the usual integrals to find the electric field. This one concerned the field above the middle of a uniform line distribution of charge. If you wish to calculate the field you must take in mind that the horizontal components cancel. However if...

Homework Statement Hello i am majoring in engineering and i would like to know from the mouth of an engineer what you guys do all day, what is the average work day like? is it all calculations and math or is it hands on building things? Homework Equations The Attempt at a Solution

Hi there, I have a question about the Teller–Ulam hydrogen bomb design. This will be a long post , but I hope someone can answer it for me. When the first bombs were created, uranium device was simple enough to to figure out. Two sub critical masses of u-235 joined at... I...

Hi, it's quite long time I didn't post so let me start by saying that I'm not religious, not even a deist. Let me also say that I'm just a layman intersted in science without any real knowledge of theoretical physics. I'm putting this question from a purely scientific standpoint, without any...

Hi everyone, I apologize if I've placed this in the wrong section. I don't know if anyone will be able to help me with this, but after an exhaustive search of the net, I can't seem to find my answer. There is a university physics textbook that my local public library once had in circulation...

An image is created due to the interaction of photons. The images we see from things like stars and galaxies were created in the past, and are observed at a later time due to the speed of light. In this sense a photon carries information which can be transformed into an image with the correct...

I have a project about High Frequency Dielectrics and I am searching everywhere but nothing found. Please I need your help to find some information that would help me in my project.

Homework Statement This is the information and calculations I have been given, but am not sure it is correct. Please verify. An object in the form of a cube with sides of 50 cm is immersed in water. Determine the height of immersed object, knowing that the density of water is 1000 kg/m^3 and...

I know that the relativistic effects really do happen, such as time dilation and length contraction. However both frames of references predict these effects in the other frame of reference. It is said that these effects really happen in both of them, due to relativity of simultaneity. The thing...

I'm only a Junior in High-School, but I know my passion resides in the field of Engineering. I love Trigonometry, Algebra, Chemistry. Whether or not i fail in some areas, and succeed in others, i always come out enjoying a process of learning in those areas. Chemical Engineering in a more...

Hello, we are learning about single balanced and double balanced modulators. Apparently single balanced modulators include an information, upper and lower sideband component while double balanced modulators use only the upper and lower sideband components. Can someone please tell me why the...

http://lanl.arxiv.org/abs/1203.5719 Abstract: We study a self-consistent solution of the semi-classical Einstein equation including the back reaction from the Hawking radiation. Our geometry is constructed by connecting flat space and the outgoing Vaidya metric at the locus of the shock...

Information Theory - Shannon's "Self-Information" units Hi, I'm familiar with information and coding theory, and do know that the units of Shannon information content (-log_2(P(A))) are "bits". Where "bit" is a "binary digit", or a "storage device that has two stable states". But, can...

URGENT need Information about statics class offered online?? I need to find a university or comm. college that will be offering statics online over the summer. If you have any ideas of schools i could call please list them. Thanks!

Below are two excellent papers that outline the mechanism by which astrocytes regulate synaptic strength. The first one shows the most important pathway, I think. Here's my summary of the story from the first paper: 1) ATP released locally by local activity (either from the granule neurons...

Hi everyone. Homework Statement We are given N spins 1/2. A rotation is defined as \rho_\theta=e^{-i\theta J_n}\rho_\theta e^{i\theta J_n} on an Hilbert Space H, with J_n=n_xJ_x+n_yJ_y+n_zJ_z\:,\quad n_x^2+n_y^2+n_z^2=1, and \theta isn't related to any observable. Given a quantum state...

I've recently found myself conducting large numbers of tests on nanoscale devices in a liquid. The device themselves are an insulated silicon wire, with an electrochemically active tip. The circuit in which they are placed can be described as follows, though my notation is most likely...

any one have good information about thin films

Hello, I would like someone to suggest me a good book on entropy and information theory. I need something that explains these subjects intuitively, rather than all mathematics. I have fairly strong knowledge of mathematics behind entropy, but all is kind of scrambled what is what...

I've always wanted to study something that has to do with how information is processed in the brain. I don't know if this sounds silly but almost like "reading" the brain. Perhaps like data/mathematical modelling? I don't really know what educational path I must choose. I am thinking that the...

I do not know if this is the right place for this post, but if I am doing a mistake by putting it here, If it is so, please let me know where is the right place to put it. So, I am learning Information Theory, this is first approach and I would like to know a few names of good books for...

from my understanding from an observer in the universe, your information is plastered on the event horizon, and ultimately retrieved when the event horizon shrinks to the schwartschild radius and the singularity explodes. please coreect me if I am wrong on that. if the singularity does not...

I may have figured out a way to do that, unless there is some fundamental principle I am not currently aware of. I should preface this by saying that I am not an expert. I have only recently decided to major in physics, and have not even begun school. But I just had a eureka moment. It works by...