What is Computing: Definition and 730 Discussions

Computing is any goal-oriented activity requiring, benefiting from, or creating computing machinery. It includes the study and experimentation of algorithmic processes and development of both hardware and software. It has scientific, engineering, mathematical, technological and social aspects. Major computing disciplines include computer engineering, computer science, cybersecurity, data science, information systems, information technology and software engineering.

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  1. S

    What are the best books for learning Quantum Computing?

    Hello. What is a good book to learn Quantum Computing? I've being looking for the most common ones and reading some reviews at Amazon, and created this list: A Short Introduction to Quantum Information and Quantum Computation, Le Bellac, 2006 An Introduction to Quantum Computing Algorithms...
  2. Q

    Other Books about scientific computing

    Hello, can someone suggest me some introductory, or basic books on scientific computing(computational physics or computational biology) ? I m planning to study masters in it and I want to grasp the basics of it before i commit.
  3. Vital

    Computing arctan (inverse tan) function

    Homework Statement Hello! Surprisingly I get different results when I try to compute the inverse tangent function. My goal is to compute it both manually and using calculator in radiant mode. Homework Equations My goal is to compute arctan(½) both manually and using calculator in radiant...
  4. Q

    Physics Simulation and model science or quantum computing

    I am a computer science under graduate,I am more interested in scientific research, so I am preparing to enrol myself masters in quantum computing or simulation sciences. before i join i want to research what are the scope and job opportunities are available for simulation sciences(like...
  5. Quantum Aravinth

    Physics Quantum Computing Career After BSc Physics: Opportunities?

    Is there any opportunities to start Quantum Computing career after BSc Physics?
  6. R

    DNS in Geophysics: Resources & Implementation

    Hi all, I am soon starting a research project into Earths core dynamics, and will be using a pre existing code. I understand the principle of DNS and resolving for all different resolutions. But I do not really understand how to implement that efficiently. Does anyone have any good resources...
  7. E

    How do I calculate internal forces in a beam bending problem?

    Hello, I am having difficulties trying to work out one problem. I've attached a picture explaining the situation - the task is to determine internal forces in C but the bending moment M(x) doesn't seem to get me the correct results (I used equivalance and went from LHS). I would greatly...
  8. M

    Is Maple the Underrated CAS for Numerical Computing?

    Until now, I have always think of Matlab as CAS but now I know that it is not. So how do you understand this? Thank you.
  9. Konte

    Computing molecular symmetry group for non rigid molecules

    Hi everybody, My post today is about Molecular Symmetry group (MS) for non-rigid molecules. I read from this excellent work (Longuet-Higgins), that MS is obtained by selecting only feasible operation from Complete Nuclear Permutation Inversion Group (CNPI). My question is, As I have a quite...
  10. G

    A Computing solutions to the radial Schroedinger equation?

    Hi all, I'm trying to compute the solutions to a general case for a Schroedinger equation with a radial potential but I'm stuck on a rather small detail that I'm not sure about. It's well known that I can perform the change of variables to spherical coordinates and express the radial part of the...
  11. T

    Courses What Classes Should I Take for Quantum Computing at UIC?

    Hello, I’m currently an Undergraduate Computer Engineer at UIC and minoring in physics. I have become more and more interested in Quantum Computing and its related fields. I plan on continuing my masters in Electrical engineering and taking graduate level physics classes at the same time. I...
  12. Dahvrok

    I Quantum Computing: Learn to Start From Scratch

    Hello I am studying Software Engineer but I am interested in Quantum Computing, I never had any serious relationships with physics so i need to start from somewhere, Can you help me?
  13. T

    Preparing for quantum computing

    I am planning to take go into quantum computing. I am a Computer Engineer with a minor in physics with a focus on modern quantum theory. I was wondering if I take undergraduate and graduate level quantum physics classes would be enough for me to have a solid background on the subject before I do...
  14. I

    How many state changes per second could optical computing do

    Using Optical Computing, what is the max amount of state changes that 1 transistor could theoretically have within 1 second? I once read that an electrical transistor could achieve 100 billion state changes per second, but I'm wondering what the number is for light, *and what it could...
  15. binbagsss

    Computing representation number quad forms

    Homework Statement ## r_{A} (n) = ## number of solutions of ## { \vec{x} \in Z^{m} ; A[\vec{x}] =n} ## where ##A[x]= x^t A x ##, is the associated quadratic from to the matrix ##A##, where here ##A## is positive definite, of rank ##m## and even. (and I think symmetric?) I am solving for the...
  16. ChrisisC

    B Quantum Computing: Benefits & Possibilities

    With the development of quantum computing, just how much could it improve our lives. Obviously faster computing, but could we begin to do things than conventional computer can't?
  17. ShayanJ

    What is HP's memory-driven computing?

    I just read about HP's new computing technology, memory-driven computing. But I can't figure out the idea behind it. Can anyone explain about it? Thanks...
  18. P

    Can Mass Fractions be Determined from Given Mass Flow Rates?

    Homework Statement I'm running a simulation and was given 2 mass flow rates (let's say m1_dot and m2_dot) for 2 chemical species at the inlet. Homework Equations mass flow rate = density*velocity * area The Attempt at a Solution I need to compute the bulk velocity for the fluid (consisting...
  19. Sunil Simha

    I Computing uncertainties in histogram bin counts

    I am working on astrophysical data and I have a large number of redshift values of quasars. Now, each redshift estimate comes with its estimated standard error naturally. If I plot a histogram of these redshifts, I would expect the bins counts to also have some sort of uncertainty. I am unable...
  20. 1oldman2

    Large scale Quantum computing developments

    I have been reading lately about the University of Sussex work on large scale quantum computing that doesn't require the Laser beam approach to controlling the atom. This seems like a huge breakthrough in the development of quantum computers however a forum search doesn't have any mention of it...
  21. C

    Schools Top Graduate Schools for Quantum Information and Computing

    Hey all! I'm a junior undergrad and am beginning to think about what graduate programs I would like to apply to next fall. Recently I've been doing theoretical research in quantum computing which I'm really enjoying. I'm pretty sure that this is the sort of research I would like to pursue in...
  22. evanatch

    Physics Is there a non-academic future in Quantum computing?

    (tl;dr: Interested in the hardware side of quantum computing, but don't want to commit to staying in academia. Is getting an industry job in quantum computing going to be realistic in 6-8 years? Are there other viable engineering-type jobs available if I end up getting a PhD in this field?) Hi...
  23. L

    I Computing the Weingarten Map L by raising an index

    Hello, I have to prove that the Weingarten Map L for the unit sphere is + or - the identity "by computing the Lik in a coordinate patch and raising an index". S^2 : x(Φ,θ)=(sinΦcosθ, sinΦsinθ, cosΦ) I have computed the first (g) and the second (Λ) fundamental forms and I have found : L=g-1Λ=...
  24. Fyj

    Studying Take module on Quantum Computing or Stochastic Mechanics?

    Hi. I was wondering if you could help me out a bit here. I have a choice to take either a module on stochastic dynamics in statistical mechanics or quantum computing for my masters. Both seem really interesting so it’s a close tie between which one has more current/future applications. The...
  25. J

    A Efficiently Computing Eigenvalues of a Sparse Banded Matrix

    I have a Hamiltonian represented by a penta-diagonal matrix The first bands are directly adjascent to the diagonals. The other two bands are N places above and below the diagonal. Can anyone recommend an efficient algorithm or routine for finding the eigenvalues and eigenvectors?
  26. davidbenari

    Other Careers for someone who mostly knows about scientific computing?

    I study Physics and my major requires me to take 6 optional courses in any area of my interest. I am interested in pursuing a career as a programmer, but my university doesn't allow me to choose Computer Science courses due to their high demand. Perhaps I can take one or two CS courses but...
  27. T

    A Computing spatial derivatives with BDF

    Using the method of lines, I am solving a system of equations of the form: $$ \begin{aligned} \frac {\partial E}{\partial t} &= u \\ \frac {\partial u}{\partial t} &= u + \frac {\partial E}{\partial z} - \frac {\partial^2 E}{\partial z^2} \end{aligned} $$ Looking at the particular formulae...
  28. C

    Computing capacitance in the general case

    This may well be a textbook question, or even a duplicate in this forum, but I have no idea of how to compute the capacitance between two conductors in the general case: all the computations I saw in textbooks make heavy use of symmetries to compute the capacitance, e.g. capacitance between two...
  29. NatFex

    Permutations (with repetitions) problem

    Homework Statement [/B] The question is phrased in the following way: There are 6 jobs to be assigned to 5 people. Each job is assigned only to one person, and each person must have at least one job. How many different arrangements are there? Homework Equations In general, I would approach a...
  30. M

    MHB Computing the number of months to save $1000

    Hello everyone! I am very new to programming and am beginning to struggle in studies. I have been working on this same problem for about 5 hours and cannot for the life of me get this thing to compile correctly. Any assistance or guidance for what I should do would be greatly appreciated. Ask...
  31. raphampm

    I Role of entanglement in general purpose quantum computing

    I've been doing a course on Quantum Computing and I haven't managed to figure out so far how entanglement would be a useful resource on a general purpose quantum computer. By general purpose quantum computer I mean some theoretical device that could possibly replace current classical computers...
  32. T

    A Computing first derivative based on second derivative

    I am trying to numerically solve a PDE, and just had a question as to the validity of a certain approach. For example, given the PDE: $$ \frac {\partial ^2 E}{\partial t^2} = - k\frac {\partial E}{\partial t} + c^2 \frac {\partial ^2 E}{\partial z^2} - c\frac {\partial E}{\partial z}$$ If I...
  33. B

    Will a UPS physically "protect" computing hardware?

    I did as much research into UPS units as I thought I needed in order to understand all of the top level jargon, but the fundamental issue of whether the appliances plugged in will be physically protected hangs over the entire industry (for domestic use). For example, a CyberPower UPS unit...
  34. S

    A ?Gravity in 3D: Computing Degree of Freedom

    Dear all can anyone help me to understand why gravity in 3 dim doesn't have local degree of freedom. How can i compute the degree of freedoms for gravity in and dimension D. If i consider massless gravity in 3d is the graviton propagating
  35. R

    B Computing force given mass and distance

    if you have an object weighing 50kgs, and you have to move it forward with a distance of 500m, no time given, what force do you need? Force is equal to the product of mass and acceleration? acceleration is not given.
  36. J

    Building a computing device for COMSOL and ABAQUS

    Hello to everyone, I've just started my PhD in Mechanical Engineering. And we've to buy a computing machine of high end to use ABAQUS and COMSOL software. Can anybody recommend the machines which can run these both software. P.S: We have to use Windows because there seems to be some graphics...
  37. R

    Linux for Physicists: Best Distro for Beginners

    I am starting my PhD soon, and I want to properly start learning linux. I have mainly used windows for most of my life, but I have been apart of two research placements using linux mint, where I did simulations attaining to Nano-Photonics. I am curious as to if you guys have any opinion on the...
  38. R

    What are the best preowned Thinkpad models for a budget-conscious PhD student?

    Hi, I am starting my PhD in a few weeks, I am in desperate need of an upgrade. My laptop has finally died after 5 years of service. I will be dual booting Linux and Windows, so a Thinkpad seems a solid option regarding my budget. I really can't afford to spend a whole lot. I will be reading...
  39. T

    I Unconventional Approaches for Boundary Values in Computing Wave Equations

    Hi, I was recently following an example shown in this link and just had a couple questions: http://www.scientificpython.net/pyblog/solving-the-2d-wave-equation-and-making-a-video-of-the-solution I believe I understand the steps, but was just not quite understanding the justification. In the...
  40. F

    I Example of computing geodesics with 2D polar coordinates

    I am trying to find and solve the geodesics equation for polar coordinates. If I start by the definition of Christoffel symbols with the following expressions : $$de_{i}=w_{i}^{j}\,de_{j}=\Gamma_{ik}^{j}du^{k}\,de_{j}$$ with $$u^{k}$$ is the k-th component of polar coordinates ($$1$$ is for...
  41. J

    How will the advent of quantum computing impact the field?

    As a senior in college studying IT , I am just learning the barebones principles about database construction, Object oreinted programming, with the intent of preperation for entering the job market. But I have always had a passion for Computers and technology in general. I understand that...
  42. Fooality

    I Will quantum computers be able to factor larger numbers in the future?

    Quantum computers are in use now.
  43. S

    Other Interesting side project ideas for an undergrad (beginner)?

    So I'm entering my second year in uni doing a physics degree. We're just about to tackle on some of the interesting topics like EM (which I've self-learnt before), Classical Mechanics(we've already covered Newtonian) and QMech. Apart from my core academics, I'm interested in pursuing some...
  44. kolleamm

    Where is the future of computing heading?

    I've read many articles on "breakthroughs" in new computing technologies however that's the last I ever hear of it. I was told that for the short term, multi core computing would likely see some advancement. What about technologies that could completely replace silicon chips like carbon nanotube...
  45. karush

    MHB 8.4.2 - Computing ∫ x² cos(x) dx

    8.4.2 $$\int {x}^{2}\cos\left({x}\right)\ dx = {x}^{2}\sin\left({x}\right) -2\sin\left({x}\right) +2x\cos\left({x}\right) + C $$ $$uv-\int v \ du $$ $$u={x}^{2}\ \ \ dv=\cos\left({x}\right)\ dx $$ $$du=2x \ dx \ \ \ \ v=\sin\left({x}\right)$$...
  46. Abhishek Sethi

    Is Pursuing Quantum Computing Feasible with a Mechanical Engineering Background?

    Hi, I am an undergraduate student from India. Pursuing double major in Physics and Mechanical Engineering. I have completed 4 semesters(2 years) of my college. I had taken a class titled "Quantum information and computing" and it interested me a lot. I really love math and computations...
  47. Ackbach

    MHB Different Kinds of Quantum Computing Measurement Operators

    So in quantum mechanics, there are at least three different kinds of measurement operators: the General, the Projective, and the Positive Operator-Valued (POVM). They have different properties and relationships. In a typical QM book, these are not delineated, but in Quantum Computing they are...
  48. Quotidian

    Is Quantum Computing for Real?

    This week, in Sydney, there was the announcement of not one but TWO Quantum Computing centres opening at two rival universities (UNSW and USYD). There was a feature on one of the current affairs shows here with the very charismatic guitar-playing professor of one of the centres, which has had a...
  49. J

    A Computing the resistivity due to electron collision with 1BZ

    Hello there, Id like to estimate how the resistivity due to electron 'collision' with 1st Brillouin zone changes as a function of number of valence electrons in a metal. Say you start with Na, then add some other material with 2 valence electrons instead of 1, then the fermi wavevector will...
  50. M

    Paramagnetic system: computing number of microstates

    Homework Statement We are given a paramagnetic system of N distinguishable particles with 1/2 spin where we use N variables s_k each binary with possible values of ±1 where the total energy of the system is known as: \epsilon(s) = -\mu H \sum_{k=1}^{N} s_k where \mu is the magnetic moment...
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