Information Definition and 999 Threads

Hi All, I have an unknown 16S ribosomal RNA gene sequence below that I am trying to identify. I know its a bacteria but anyone know of a site/program online that allows you to enter the sequence below and it gives the likely close match? TAGGGAATCTTCCGCAATGGACGAAAGTCTGACGGA...

I know its been asked a lot of times, but reading all those threads convinced me that through entanglement we can not send information faster than light (FTL). We can just correlate the result of random experiments. Nevertheless, reading this articles (and a lot of other similar articles)...

Faster than light information travel aparatus Ok, so I am not a physics pro, but I find it very interesting. And I just finished reading about Bell's theorem and I have a question. As I understand it, the laws are like this for entangled photons: 1. If you measure the polarization of photon 1...

A large number of particles are entangled and then sent out as a stream in opposite directions to two far away points. At one point, a sender attempts to transmit a binary string bit by bit : for a 1 bit he measures the position of N (fixed constant) particles, to a high precision. For a 0 bit...

I have not read any formal (mathematical) explanations of black hole thermodynamics, only popular literature on that subject. I have read that the total amount of information, and therefore its entropy, that a black hole can contain is proportional to the area of its event horizon (measured...

I have questions about how fluid dynamics may be used in general, particularly flow visualisation and extraction of flow parameters. I currently use a DNS code to propagate a wake near the fluid surface (fixed), from which I extract snapshots of the surface velocity field at particular...

I need some help understanding how much information I can pull out of this data. I have a sample made up of two materials. Materials A and material B. Then I took a picture of the sample. The two materials mix quite well, but not perfectly, so on my image I can see that some areas are mostly...

Several questions. 1. Do different observers (with the same knowledge) in different inertial frames agree on the number of states of some specific system? 2. The same question for the different accelerated frames; 3. The most difficult one Say, Alice observes some system X with N particles...

Homework Statement Let X1, . . . ,Xn be a message from a memoryless source, where Xi are in A. Show that, as n →∞, the proportion of messages in the typical set converges to zero, unless Xi is uniform on A. Homework Equations The Attempt at a Solution Confused, possibly because...

If a particle (let's call it Z) is happily minding it's own business, and a particle-antiparticle pair spawns in it's vicinity (let's call them particle A and B, created from 'zero point' energy), and it just so happens that the antiparticle (let's say B) collides with particle Z before it is...

Homework Statement Learning to solve cubic equations without the knowledge of any roots, and the easiest way I found out so far is still time-consuming Homework Equations The equation and attempt is shown in the image below, tell me if its unclear :shy: The Attempt at a Solution...

Here: http://en.wikipedia.org/wiki/Holographic_principle I read: "Entropy, if considered as information (see information entropy), is measured in bits. The total quantity of bits is related to the total degrees of freedom of matter/energy" Bold is mine. Here is my question. I believe that...

An object dropped from the top of a cliff takes 1.80 s to hit the water below. What is the height of the cliff? I do not know of any equation that would work as only one piece of information has been given I could not even begin my calculations as I lacked information. Is it...

Homework Statement A missile is launched from a silo 50m deep. After 20 seconds the engine stops, there is a 10 second period where the rocket is coasting straight up. At the end of this period, the rocket is 8000m above the ground. a) What is initial acceleration of rocket? b) What is...

I appear to have a very specific need, I require some sort of a book that covers the human nervous system from a to z, I need to know everything about it, what it's made of, what each part's function are, how the nerves behave at each particular sections of the body, the calculations that are...

Dear All, I have read many threads on second careers including the excellent blog by ZapperZ "So you want to be a physicist" and then reaching out to you all for guidance. First, a brief introduction on myself: Industry Experience:  I am a US Citizen based out of the Northern NJ/ NY...

Hi there everyone! I am posting after on this forum after quite a while... I am about to make a very important decision regarding my academic career but i am puzzled on which degree would be more beneficial like the title suggests i have the option of "m.sc IT"(mostly concerned with...

I wondered if people could clear up some misconceptions I have about radio waves. 1) If I have a 800 MHz wave, does this mean 800 Mbits per second can be transferred in theory? Could I not change the amplitude of this wave every 0.00000000125 of a second, So when a receiver is reading it...

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...

Hi, I have been reading up on photo-dissociation of CO2 and I all I can find is wiki and a couple other sources. I was wondering if anyone knew of any good sources of information on photo-dissociation of co2. Like on what wavelengths of EM are best and the energy needed to cause the breaking of...

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...