Information Definition and 999 Threads

It was reported by 60 minutes that members of Congress may have benefited personally from information gained during the course of their work. This behavior is strictly prohibited on Wall Street - should the same rules apply to elected officials...

So I am enrolled into this course. And we are learning probability and statistics and all that good stuff. But one thing bothers me VERY much. I lie, a lot of things bother me about this course but here is the first one: Transformation of random variables. So far we have been...

Hey! I am a student and would like to know if it is possible to collect and handle real time information from traffic participants and find solutions with this information to traffic problems like traffic jams? Can you also cluster this information? Thanks Angelika

Hello there, (Sorry, I hope not to come on here too forward or over anyone's head). I am 25 years old (Junior), I seek information and am super hungry for it. I seek how to design cars, and all aspects thereof. I have decided to pursue establishing my own automotive engineering firm, and...

Hello, I'll try to explain this as well as I can... I was watching NOVA's special on The Fabric of the Cosmos and the segment on how information is both lost in the black hole and stored on the surface got me wondering "Is there a limit to how much information can be stored on the surface...

I was planning to skip fields, Lebesque measures/integration and complex analysis. Can someone who's given the test tell me how important these topics are? (I haven't looked at any practice tests yet) I haven't done this stuff in college yet so understanding them will take quite an effort on my...

Is it "Information" or "Interaction" that "Observes"? First off, I know there are many questions on this forum in regards to "does consciousness collapse the wavefunction" and I admit that this is roughly the same question in a different way. I wanted to approach this in a new topic though...

Hello, i want to know if there is any way we can describe the way our brain transfers information using Quantum Information theory. I have been looking at Quantum Information theory for some time now and would want to know if it will ever be possible to transfer information directly from the...

I seem to be at a loss to understand something pertaining to the role of the phase factors in defining quantum states and their consequences in quantum computing. So, I learned in class and read in numerous books, and online, that the phase factor has no physical significance as it does not...

To elaborate, are they looking for a specific last year thesis for example? I'm reading a four year physics MSci.

I've put the problem and my attempt all in one image. I would show the above using induction. But to show the order of the element in question, we need to know what power to raise the element to such that it equals the identity. I feel like the problem is missing information about the...

Could someone help me understand the strength of fields that can be produced with piezomagnetism? I have not had much luck with searches for these materials.

hello all i need to build my own vacuum chamber any references i build one but it is not working ... want your help and experience in it

I'm a graduate student, and now in the second year at graduate school I'm going to have to work on a research project on some field. I want to specialize in theoretical quantum information. My main motivation is that this field studies, in fact, quantum mechanics and is actually building and...

I was wondering how they did come up with the way of setting permissions using the linux program chmod by just using numbers. For example: 1 is for execute 2 is for write 4 is for read Any sum of those give a unique permission to a file: 2+4=6 Let's you write and read it. 1+4=5 Let's you...

So chalk nowadays is made up of calcium sulfate rather than calcium carbonate. I want to know if there exists any data on spectral lines of calcium sulfate. If not, does combining the spectral lines of calcium sulfur, and oxygen create the spectral lines of the original molecule? Why does...

To keep it brief I have had to change my degree to a BEng Aircraft engineering (year 4 hon year), the main hiccup:confused::confused::confused: the crash course that I need to do for matrix and one or two of the other subjects but it's the matrix work that I am struggling with . I need...

I have what may be considered a rudimentary question, but one which I've actually never asked and have always wondered about. Many people have posed the question as to whether or not a very long, rigid object could be "pushed" on one end and instantaneously transfer information across a vast...

Homework Statement If an electronic scale reads 502.4 g, what is the absolute uncertainty in the mass reading. Homework Equations Not sure The Attempt at a Solution Not a clue, it seems that there isn't enough information given. How am I supposed to figure out the absolute...

The title is quite explanatory of this post. It has been suggested in other posts that quantum entanglement may be used to send usable information at speeds which may be viable for interstellar distances, making viable the holograms of Star Wars. However, as I understand it, sending...

please the exmple for wims

what is information? or how is information connected with change and dependency ? take an example , y=f(x) if y is independent of x(say y=3),will there be information? how does the change df(x)/dx effect the information content?

May be am taking you a way too back, but I really don't understand what this Information in a black hole is ! I've bin reading about it for the past 2 days but could understand it in no way...Is it anyway physical?? and this sentence is almost killing me : Information gradually leaks out during...

Does anyone have information on how exactly a atomic clock works? I have had advanced quantum mechanics courses so I am sure I wil understand it. My problem is that I can't find any descriptive materials (with drawings), the wikipedia page is very vague about the different things. So can...

Anybody have suggestions on any reading material that would be (sorta) accessible to an undergrad? Intro stuff, anything would be great. THANKS!

What I am interested in here specifically is - how are bits represented? Is it as "1" is represented with a sent photon [at those specific frequencies] and "0" with a .. silence (no photon sent) ? ... but this, in that case, would get really complicated, because other photons from other...

Gravity, information, and cosmology (was "Thoughts about the universe") There was a thread here a few minutes ago, posted by a new user, called "Thoughts about the universe". It contained reflections about gravity, information, and the universe, that were probably inspired by the holographic...

I am a physician not a physicist, but I read Brian Green, Susskind, Thorne, Gamow, etc. I recently learned of the Blue Brain project as well. It has occurred to me that dark matter may represent a two dimensional sphere surrounding each galaxy which holds the information for that galaxy. The...

So the basic understanding I have of electron transitions for EDX, XES and other x-ray fluorescence techniques is that a transition from: L to K shell is named K\alpha M to K shell is K\beta N to K shell is K\gamma M to L shell is K\alpha etc. Grand, easy... google leads me to multiple diagrams...

I was wondering, well basically if photons carry information about themselves that is interpreted by our brain? I ask because I was thinking about things like color and distance. Correct me if I'm wrong but we see different colors because of the way the molecules or elements that make up an...

Hi I am wondering in which way a vector network analyzer obtains the phase information (in SFCW / FMCW mode). Can someone provide me further information about how an VNA works? Thanks!

I need some help finding out the energy density of different heavy water reactors. In IAEA research reactor database they only list the thermal output of some HWR - RR, but they lack information about the dimensions of the core, thereby making it difficult to figure out their energy density...

Homework Statement A 5324 cubic foot tank with square base and an open top is to be constructed of a sheet of steel of a given thickness. Find the length of a side of the square base of the tank with minimum weight.Homework Equations The Attempt at a Solution I'm usually fairly decent at...

Regarding the problem of the low entropy state at the big bang, people like Penrose, Page, Carroll etc. do not think that inflation solves the problem. I recently read and listen to Seth Lloyd and his explanations about the beginning of the universe from the point of view of entropy as...

I know the fact that, if the total strength of the nerve signal exceeds the threshold at axon hillock, it triggers an action potential. But if someone asks me a question about axon being the nerve impulse generator or the structure responsible for transfer of information, then I would say that...

I understand that any information of an object falling into a black hole is conserved because the object asymptotically approaches the singularity leaving all the information at the surface area of the black hole until it evaporates. This is known as the holographic principle that three...

What is a Nyquist's information in discrete measurements? We perform a measurement of some physical object, giving a result value in interval [0,1] in some units. The value has a gaussian statistical error of some known \sigma (by order of magnitude comparable to 1). We do lots (\rightarrow...

I'm not sure if this is the appropriate forum, but I'm trying to find out if there is a specific symmetry (according to Noether's Theorem) that is reflected in the conservation of information?

I just bought a new car, nothing incredibly special. And being a nerd, I love creating theoretical calculations based on given data. So, I've been trying to predict the effects on my car under certain scenarios. I am doing my best to figure out the effects based of equations alone, and not...

Can anyone give me a rough idea of a timescale for first planets in the Universe? I understand that supernovae are required for heavy elements for rocky planets such as Mars or earth, but was wondering if this same requirements would hold for gas giants? Just trying to establish the most...

can a particle hold it's information at absolute zero?

Many scientists believe information is conserved, but it seems that in an isolated system entropy isn't. These two things seem incompatible to me. Would anyone care to enlighten me about this? Thank you.

Hello All, I have not yet entered undergrad EE. I am in a mid year break and need a intro level book. It should be formal and factual and where necessary technical, but at the same time it should outline: - historical development of electronics and electrical technologies - historical...

Hi all, I had a question about calculating mutual information, a topic to which I am very new. Consider the following hypothetical situation, in which I describe the entire process from what I understand: Suppose I had a normal die (sides numbered 1-6) that you roll on a leaning table. I...

Hello. I've made a lab experiment of interference and with a CCD camera photographed fringe pattern which one can understand as a periodic signal. My question is: When I apply an FFT to the image is there any limit to the amplitude information I may get from lower frequencies? I read in the...

First, let me point out that this is probably wrong. Anytime I hear faster than light travel I am automatically skeptical. I just haven’t figured out why it’s wrong yet. Any ideas? 1. Two devices situated in between Bob and Alice produce two streams of entangled pairs of qubits. Each pair...

Hello, This component has very little information on the internet. I learned the classic exploitation of it with 2 transistors(attached) and I get that. But i feel that is just an analogy. Does anybody here at PF EE know the details behind this component like, explanation with junctions...

Does quantum entanglement allow information to travel faster than light? http://en.wikipedia.org/wiki/Faster-than-light if you scroll down to quantum mechanics.

Hi everyone! This is my first post on these forums. I have successfully passed and secured an all India rank of 396 in IITJEE this year. I am going to study mechanical engineering in IIT Bombay. Hence i need some kind of an insight in this department. My actual interest was in both...

Hello PF members I am a very new member to your forum and very new to time-frequency transformation. Over the summer I will be doing some research on vibration signals and for now I want to start understanding some basic things upon the time and frequency domain and transformation...