Computing Definition and 683 Threads

Thought you might like this... This http://www.ted.com/talks/stephen_wolfram_computing_a_theory_of_everything.html?utm_source=newsletter_weekly_2010-04-27&utm_campaign=newsletter_weekly&utm_medium=email" by Stephen Wolfram is about 20 minutes long, but the most interesting parts are from...

http://arxiv.org/abs/0812.3356 http://arxiv.org/abs/1004.2062

Hey , I want to know about the courses in quantum computing at univ. of waterloo or IQC or perimiter institure for international students and also the procedure and other formalities to apply there??I have done masters in physics and currently having a 2 year IT exp. under my belt. i want...

Homework Statement Find the Fourier series for y(x)=\begin{cases} A\sin(\frac{2\pi x}{L}) & 0\leq x\leq\frac{L}{2}\\ 0 & \frac{L}{2}\leq x\leq L\end{cases}Homework Equations B_{n}=\frac{2}{L}\int_{0}^{L}y(x)\sin(\frac{n\pi x}{L})dxThe Attempt at a Solution...

I've noticed more and more that I go to absurd lengths to avoid computing things. Everything from finding derivatives to solving integrals to simplifying expressions I've been doing on a computer for the past couple of years, and it's gotten so bad that I don't even attempt to do the...

I know this is a rather new field of research and that I may seem rather silly for asking, but I would like to know besides upper divison undergrad quantum mechanics ( which I've already studied ), what other subjects should I learn to get the basic background for researching quantum computers...

Can someone give me a layman's explanation for the Qubit? And, like the bit, does it represent an intangible, or does it have some material quality to it?

I wanted to get into research and so far it seems like a fairly easy process. I want to delve into the world of quantum computing, but unfortunately there are currently no professors at my school who research that topic. So I wanted to start my own research team with a professor and find a way...

1. Homework Statement [/b] Use the transformation that takes the unit square to a triangle to compute the integral \int\int_{B}2x+3y dA Where B is a triangular region with vertices (0,0), (5,2), and (3,4). The Attempt at a Solution What I did was I drew the region on an xy...

Hi, ok.. i know I am probably expecting way to much off you guys here but its my only last resort before i give up! Ill explain.. I am a avid aviation fan as well as an avid game developer whilst also being a fulltime software developer. So i program in delphi at work and what i want as a...

Alright, I'm just getting my feet wet in the world of physics, but, I've taken a particular interest in quantum mechanics/physics. And, my first question is, what is the point of quantum computing? It's my understanding (Though it's probably seriously flawed) that quantum computations are used...

Homework Statement C is triangle (0,0), (4,0), (0,3). R is the enclosed region. Compute the following integral, where n is the outward pointing normal: \int_{C} \left(4x-y^{2}\right)n^{1}ds where n^{1} = \widehat{i} \cdot \widehat{n} Homework Equations The Attempt at a...

suppose, s_{n}(f;t) = \sum_{k=-n}^{n}\widehat{f}(k)e^{ikt} and \sigma_{N}(f;t)= \frac{1}{N+1}\sum_{n=0}^{N}s_{n}(f;t). how do i get from this \sigma_{N}(f;t)= \frac{1}{N+1}\sum_{n=0}^{N}s_{n}(f;t). to this \sigma_{N}(f;t)= \sum_{n=-N}^{N}(1-\frac{|n|}{N+1})\widehat{f}(n)e^{int}...

Homework Statement Solve \int_-1^1 (x^{4/3} + 4 x^{1/3}) dx Im having difficulties in algebra when solving this problem. Homework Equations The Attempt at a Solution \int_-1^1 (x^4/3 + 4 x^1/3) dx = 3/7 (1)^7/3 + 4 3/4 (1)^4/3 - 3/7 (-1)^7/3 + 4 3/4 (-1)^4/3 = 3/7 +...

Homework Statement Compute the total mass of a wire bent in a quarter circle with parametric equations: x=cos(t), y=sin(t), 0\leq t \leq \pi/2 and density function \rho(x,y) = x^2+y^2 Homework Equations not exactly too sure which equations if any i need to use. maybe the jacobian...

Is there a name for this or any research in it? I remember this: http://www.wired.com/wiredscience/2008/08/how-to-train-yo/ but I can't find anything else like it.

Hi gays, Can anyone help me to find an excellent university in Canada that offers Msc and Phd on Quantum computing?

I recently took a great interest in topological quantum computing - so great an interest I am even considering it as a thesis topic for grad school (though I am still a junior undergrad and have awhile to figure that out). What would be some useful courses to take to pursue theoretical research...

I need to find the circulation for a flow in a pipe. I'm using the velocity in the angular direction (cylindrical coordinate system). Am I right in thinking that an ideal vortex is one where there is no vorticity? That would mean there is no circulation. It's strange, because the velocity is...

Homework Statement Compute \sum_{n=0}^{\infty} p^n cos(3nx) for \abs{p} \textless 1 , where p \in \mathbb{R} . Homework Equations The Attempt at a Solution I was thinking that maybe this could be approached as a telescoping series, but I'm not really sure if it is. Would that...

Homework Statement This question isn't that hard just confusing: Write a program to compute the per-minute storage requirements for “full HD” TV at 60 HZ (60 frames per second) where each frame is captured at a resolution of 1920×1080 pixels using 24-bit color. Homework Equations 1 pixel...

Homework Statement Compute the semimajor axes "a" of Halley's Comet. Given: orbital eccentricity e = 0.9673 period P =76 days (2.39674E9 seconds) Gravitational Constant G = 6.67428E-11 solar mass M = 1.9891E30 Kg. Also used in equations are: L = angular momentum of center of mass...

I've been reading the thread on completely erasing hard drives as well as a bit on the File Allocation Table (i.e. FAT). Apparently formatting your computer does not completely erase your data from the disk. So I have some questions: 1) Does the FAT contain a collection of "pointers" to...

Hi there, Is there an "easy" way to find a tangent space at a specific point to an implicitly defined manifold? I am thinking of a manifold defined by all points x in R^k satisfying f(x) = c for some c in R^m. Sometimes I can find an explicit parametrization and compute the Jacobian matrix...

In the last step to get result from a quantum computer, measurement is required to collapse the quantum state. This can be done by the measuring a large ensemble average of same computed result. One realization I know is to use NMR to measure billions of spin. So, what is the minimum number of...

Hi there, as much of you i possesses a notebook (ubuntu) with DualCore processor. When i write my scientific simulation (C/C++ usually) i don't mind parallelizzation at all, that is, my program works on a single core only. I want to get benefit from dualcore technology without being crazy...

Homework Statement computing the residue; 1/(1+z²+z⁴) Homework Equations Can someone explain to me what a residue is and how to calculate it! Is it simply the discontinuities of the function? The Attempt at a Solution

I'm working on an electrostatics problem that I'd appreciate some clarification on. I'm trying to compute the surface integral of a field \lambda(ix +jy) over a surface that is the half cylinder centered on the origin parallel to the x-axis - that is the end caps of the cylinder are located at...

Homework Statement describe the laurent series for the function f(z) = z^3 cos(\frac {1}{z^2}) b) use your answer to part a to compute the contour integral \int z^3 cos(\frac {1}{z^2}) dz where C is the unit counter-clockwise circle around the origin.Homework Equations The Attempt at a...

Hello everybody, My question to you is how can I compute the values of Hr and Hz given the value of A - the magnetic vector potential. The reason I seek this: I'm using the FEMM software to obtain the H values at points around a solenoid. The .ans file that FEMM creates has a huge list of...

Homework Statement compute arccot (-1/3 (3 in sqr. root)) Homework Equations The Attempt at a Solution Sorry for posting one so soon after, but this is really annoying me. I have looked through my trig book but i cannot remember what an arccot is. I know that there cannot be...

so i have a problem which can be formulated in the following way: assume you have n particles and you know the initial position of each. There is some probability distribution P which contains the probability of having a particular velocity. Now, each particle has this same probability...

Hello! I'm a few weeks away from being a high school senior, and I'm looking at going into Computing Sciences after high school. But when I checked out the website of the University I plan to attend, it listed Computing Science as both an Arts and a Sciences course. Why is this? Are there two...

I plan on finishing up a B.Sc. in math with a minor in physics in the next few years. Afterward I would like to get a job for a few years and then continue in graduate school learning more about scientific computing and the like. My question is what sorts of jobs are available in scientific...

Who if anyone has a good knowledge base on this topic, I am really intreged to get on bored with a bunch of people with this topic as I want to study this at UNI, Anyone that has any skills, knowledge or experience working with such field post in here I am very basic when it comes to this but I...

Hi, I'm trying to compute P^{\mu} = \int d^{3}x T^{0\mu} where T is the stress energy tensor given by T^{\mu\nu} = \frac{\partial\mathcal{L}}{\partial[\partial_{\mu}\phi]}\partial^{\nu}\phi - g^{\mu\nu}\mathcal{L} for the scalar field \phi with the Lagrangian density given by \mathcal{L} =...

Homework Statement x=(2,1+i,i) and y=(2-i,2,1+2i) Homework Equations The Attempt at a Solution um ok normally i would use <a,b>=|a||b|cos(theta). But these are complex numbers. I have no clue how to do this.

Homework Statement Compute the Fourier series for the given function f on the specified interval f(x) = x^2 on the interval − 1 < x < 1 The Attempt at a Solution Just wondering if anyone can verify my answer? f(x)=1/3+\sum(4/(n^2*pi^2)*(-1)^n*cos(n*pi*x))

Homework Statement "A hot-wheels car of mass 0.0250 kg is traveling on a horizontal track with a velocity of 5.00m/s. If the track suddenly turns upward, how high up the track can the car travel?" Homework Equations work = mgh = force * distance PEf + KEf = PEi + KEi KE = .5mv^2...

Some disasters attributable to bad numerical computing http://www.ima.umn.edu/~arnold/disasters/disasters.html That's why software QC/QA are critical - both in the code/method and in the implementation/application. And not to forget: Garbage in = Garbage out

Does anyone else here do distributed computing? I have my PCs running World Community Grid and work on the Clean Energy Project. Does anyone else participate?

for example: f(x) = x^(x^x) Firstly, is there already an inverse of this function that can be expressed in functions that exist? And if there isn't, how would I go about computing it in code? Is there a better way than trial and error?

Homework Statement Compute the general solution of y'' + 4y' + 20y =e-2tsin4t Homework Equations The Attempt at a Solution after using determinants, I found the \lambda_1 = -2 + 4i and \lambda_2 = -2 - 4i So the general solution would be y(t) = k1e-2tcos4t + k2e-2tsin4t + yim...

Homework Statement Let Bt be a standard Brownian motion. Let s<t: a) Compute P(\sigma B_{t}+\mu t|B_{s}=c) b) Compute E(B_{t}-t|B_{s}=c) Homework Equations Defition of brownian motion: B(t) is a (one-dim) brownian motion with variance \sigma^{2}if it satisfies the following conditions: (a)...

How sustainable is computing? I spend several hours working on a computer each day and I am worried that this practice is not sustainable and/or not scalable to the entire world population. What do you guys think?

Hi guys, I'm really interested in doing Grad study in the area of Quantum Computation (in Canadian U.). My background is B.Sc. in physics and Com Science and M.Sc in Com science. From my understanding, QC can be heavy in the field of physics for the HW part that they're trying to find a...

I am just starting to learn about attitude estimation and control of a flying(or actually, a freefalling) vehicle. There will be inputs from accelerometers and gyroscopes, Kalman filtering to estimate the correct attitude and control algorithm to achieve the desired attitude. I am still...

Homework Statement http://img19.imageshack.us/img19/5192/captureonr.th.jpg Can anyone tell me if I did any mis-computation on evaluating the triple integral above? Homework Equations The Attempt at a Solution

does anyone have ideas or easy to read versions of code for this? I was looking for ways to do it using the limit definition of a derivative of a function and I've found a few applets but nothing that is that clear; any ideas are appreciated.

Just wondering if anyone on this forum has an extensive knowledge that they would like to share. I've heard that the basic concept in quantum computing has something to do with representing binary information with a variable 1 or 0. Something like that. I was trying to follow but it was very...