Program Definition and 1000 Threads

A computer program is a collection of instructions that can be executed by a computer to perform a specific task.
A computer program is usually written by a computer programmer in a programming language. From the program in its human-readable form of source code, a compiler or assembler can derive machine code—a form consisting of instructions that the computer can directly execute. Alternatively, a computer program may be executed with the aid of an interpreter.
A collection of computer programs, libraries, and related data are referred to as software. Computer programs may be categorized along functional lines, such as application software and system software. The underlying method used for some calculation or manipulation is known as an algorithm.

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  1. Leo_Chau_430

    Comp Sci Automatic Market Research Program

    I was given an Excel that contains a list of products, my teacher would like us to scrap through the website hktvmall.com to find respective similar products and list out their prices and description. FYI:
  2. Leo_Chau_430

    Python Why Use Python for Web Scraping Instead of Excel?

    My code is as follow: import pandas as pd from bs4 import BeautifulSoup import requests import os url = 'https://www.goodschool.hk/ss' response = requests.get(url) html = response.content soup = BeautifulSoup(html, 'html.parser') school_items = soup.find_all('div', {'class'...
  3. Doc Al

    Need a free backup program for Windows

    I'm looking for a free (and simple to use!) program to do differential backups of my files on my Windows laptop. I don't want anything encrypted, just something that can compare files to the backup and add/subtract whatever's been changed. Years ago, I used "Karen's Replicator". Not sure if...
  4. kafka64

    Should I skip labs/experiments for Mathematical Physics program?

    I am attending University of Waterloo and my school will allow me to graduate as a Mathematical Physics major without taking any labs/experiment courses (in my school lab is not integrated to physics courses, they are separate courses with separate credits). This could be great because : -...
  5. Drakkith

    Is Kerbal Space Program Free on Epic Games Store Right Now?

    Just FYI to anyone who is interested or has a friend or relative who might be interested, Kerbal Space Program is free on the Epic Games store right now through January 12th at 10AM (don't know the time zone). Kerbal Space Program is THE game if you are interested in rocketry, realistic space...
  6. tetrahed

    Other Do I need a physics degree to get into a physics graduate program?

    I know this might be a stupid question, but I am serious. Some of my friends are in graduate programs not much related to their major (a number of my friends majored in math but are in computer science grad programs, and vice versa), so I am curious whether the same holds for physics. In my...
  7. shivajikobardan

    JavaScript Why use spread operator in this react program? What does it do?

    Code for this is here: https://codesandbox.io/s/floral-frog-7zfon3 I got the general idea of program flow in this case. First user clicks a button, then function gets called, that function in turn updates the state from initial [] state to [{id:1,value:0.12232}]. Now the array map accesses...
  8. shivajikobardan

    JavaScript How does props program flow work in react js?

    App.js: import React from 'react' import Helloworld from './components/HelloWorld'; import Users from "./components/Users"; const App = () => { return ( <div> <h1>List of Users</h1> <Users name="Zino Emi" job="Developer" /> <Users name="Lionel Messi" job="Web Developer"...
  9. shivajikobardan

    Java How does this Promise program flow work in javascript?

    Promises syntax that I learnt: let p = new Promise(function (resolve, reject) { let x = 20, y = 20; if (x == y) { resolve(); } else { reject(); } })p.then(function () { console.log("that's correct"); }) .catch(function () { console.log("that's not correct"); }) I...
  10. D

    Did my Android program crash because it lacks a delay mechanism?

    Hi everyone I modified some code that originally displayed a toast when the screen was pressed and held. The original code used onTouchListener with a relative layout, but I changed it to a button instead. I think I've copied it correctly, but my program crashes when the button is clicked. I...
  11. R

    I I made an N-body simulation program

    My little project - 3body simulator started as a programming exercise, which I attempted to make a program that solves the famous 3-body gravity problem using numerical integration. Later I gained interest in the underlying physics and expanded the program to solve N-body problems involving...
  12. M

    Which factors of a PC determine the opening time of a program and a large file

    Hello. Would you please explain the factors that determines the opening time of a program or a big file. For example if you have a large excel file, why would you have a difficulty to open it, if it is very large? If it is in your PC's main storage, that is either HDD or SDD, is it reading...
  13. Sciencemaster

    I Calculate Gaussian Curvature from 4D Metric Tensor

    I've been trying to find a way to calculate Gaussian curvature from a 4D metric tensor. I found a program that does this in Mathematica using the Brioschi formula. However, this only seems to work for a 2D metric or formula (I would need to use something with more dimensions). I've found...
  14. C

    Call program written in language B from program written in language A

    Let's say I have an algorithm ## ALG_A ## written in language ##A##, and I wish to call algorithm ## ALG_B ## written in language ##B## through ## ALG_A ##. What are some ways of achieving this in implementation? For example, say I want to calculate stuff in C language and provide this...
  15. Tesla In Person

    Comp Sci Scratch codes -- Find the value of a at the end of the program

    Hi, i am really new to scratch programming so I am having difficulties in interpreting how does this code work ? I understand the first block set a = 5. But i don't know what is that " Repeat 10 " block. What does it do? So really stuck at that "repeat 10" so haven't gone further.
  16. WMDhamnekar

    C program could not be compiled and executed at Windows command prompt

    /* Write a c program to convert given number of days to a measure of time * given in years, weeks and days. For example 375 days is equal to 1 year * 1 week and 3 days (ignore leap year) */ #include stdio.h #define DAYSINWEEK 7 void main() { int ndays, year, week, days...
  17. M

    Python Python: Semidefinite program with CVXPy 'Error parsing inputs'

    Hi, Question: Why is the error 'Error parsing inputs' in CVXPy occurring? Context: I am trying to solve a semidefinite program in CVXPy (using Google Colab). I went to the documentation (HERE) and I copied the example code into a cell. It doesn't work for some reason and I don't understand...
  18. M

    How to program a buzzer to a PIC18F452 with PROTEUS and MPLAB IDE?

    crystal frequency is 4MHz The code i have tried is: #include <p18cxxx.h> #include <xc.h> void main(void) { TRISC = 0; // making TRISC pins output ADCON1 = 0x07; // making them digital pins while(1) { RC0 = 1; __delay_ms(5000); RC0 = 0...
  19. A

    Is there a program that can run depletion calculations in reverse?

    I was having a conversation with a coworker and this question came up: is there a program like ORIGEN (or maybe even ORIGEN) to run decay calculations in reverse? It's a relatively easy process to start with a given quantity of an isotope (e.g. U236), run it through a program such as ORIGEN...
  20. jedishrfu

    So You Wanna Program a Quantum Computah Just Twist

    https://spectrum.ieee.org/quantum-programming-language-twist?share_id=6917385
  21. Wrichik Basu

    Program Ubuntu to ignore mouse clicks that are very close in time

    At the very beginning, I accept that I have a faulty mouse. I bought it last year, and it's been only one year (almost), and the left button is malfunctioning. Single clicks are often becoming double clicks, which is causing a host of problems — closing two tabs one after the other in browsers...
  22. M

    Optimization: Formulation of the dual of a semi-definite program (SDP)

    Hi, I was working through the following optimization problem, and am getting stuck on how to get to the dual problem that is being presented. Question: Find the dual problem for the semidefinite primal problem below: min_{X} tr(C^T X) \text{subject to} AX = B X \succeq 0 (the answer is...
  23. fluidistic

    How to understand this "decompiled" program?

    I am sinking deeply into the cryptocurrencies world. There is a website that shows a "smart contract", a piece of code that is supposed to provide rewards for "staking" a particular token, where the rewards is two different tokens (I am not even sure in which proportion). Usually people who...
  24. elcaro

    Storing program source as relations in a database instead of text file

    Almost all (compiled or interpreted) programming langues store the program source in the form of a series of bytes (using an encoding like ASCII or UTF-8) into a text file, enforcing the grammer of the programming language using a parser (as part of the compilation process or interpretation of...
  25. M

    MHB Program to calculate the sum of polynomials

    Hey! 😊 A polynomial can be represented by a dictionary by setting the powers as keys and the coefficients as values. For example $x^12+4x^5-7x^2-1$ can be represented by the dictionary as $\{0 : -1, 2 : -7, 5 : 4, 12 : 1\}$. Write a function in Python that has as arguments two polynomials in...
  26. dRic2

    Always launch a program with additional parameters Ubuntu 20.04

    Hi, Due to a proxy issue I have to launch chromium with this additional requirement to set the right proxy chromium-browser --proxy-server=http://proxy.myproxy:XXXX To get things more easy I defined an alias alias chrome='chromium-browser --proxy-server=http://proxy.myproxy:XXXX' so now I...
  27. T

    MCNP: Critical Mass of UO2 (10% Enrichment)

    I wrote a program to determine the critical mass of uranium oxide with an enrichment of 10%. I got a keff approximately equal to 1 with the selected volume and density (attached a file). Is it possible to somehow run the program without writing the initial density and volume into the conditions...
  28. F

    Saving the state of a program versus running the program

    Hello Forum, I am not completely clear on the idea of saving the state of a Python program. We can write a .py program which has instructions, formulas, variables, user inputs, and uses data from an external file, etc., and run such file. However, running the program is different from saving...
  29. R

    Programs How to pursue a physics grad program with a math degree?

    Hello, I hold a BS in mathematics and want to pursue a career in physics. Is there any way where I can directly join a physics grad program from my current background? What are the options available? And would it be better to pursue an MS in applied math and then switch to physics? Would a good...
  30. C

    B Measuring change in g with height (TV program many years ago)

    Bit of a long shot but can anyone remember a TV program where the presenter measured the weight of something at ground level and compared it to the weight at the top of a tall building, possibly the Empire State building? Sorry I can't recall more details. Think it was at least 10 years ago...
  31. S

    How should a program make a function out of a symbolic expression?

    Suppose a program computes or reads-in a symbolic mathematical expression like ##2x^2 - xy + y##. What's an effective way to cause the program to implement the expression as a function (e.g. implement ## f(x,y) = 2x^2 - xy + y##) when the programmer doesn't know in advance what the expression...
  32. K

    Enrolling in a Graduate Physics Program with an Architecture Degree

    Hello, Is it possible to enroll in a graduate program in physics if I have an an undergraduate degree in architecture? Or is an undergraduate degree in physics- or in a related field- required to qualify? (Assuming that I have studied extensively physics (alone) while obtaining my degree in...
  33. AJSayad

    Online ME or AE Program for Active Duty Military Service Members

    Hello everyone, I have a friend who serves in the military, he enlisted right out of high school (about 3 years ago) and he is looking to start a program to earn his bachelors degree. Due to his current role in the military, he needs to take courses online in order to fulfill his duties. He...
  34. Y

    Need program to convert MPG to MP4

    Hi I have a MPG file that I cannot watch on my computer. My computer will play MP4, I know there are online program to convert MPG to MP4, I want to get a safe link from you experts before I dare to do that. This is what I found, but I want to get your feedback before I do anything...
  35. Y

    Programs Help Finding Online Post-Master's Certificate Program in Engineering

    Hello all, I'm looking for an online Post-Masters Certificate Program in Engineering. Can anyone please point me towards one? My background is in Electrical and Systems Engineering. So I wouldn't mind a Post-Master's certificate in either Electrical Engineering, Systems Engineering, or possibly...
  36. M

    Comp Sci How Does a Boolean Variable Impact Program Functionality in C++?

    #include <iostream> #include <string> #include<iomanip> //prototypes double gettingInfo(double&, double&, double&, bool&, char&); double errorChecking(double&); double calculatingPrice(double&, double&, double&, bool&); double printingReciept(double&, double&, double&,double&); using namespace...
  37. E

    Why is this matrix not working in my program?

    https://projecteuler.net/problem=101import numpy as np for j in range (1,11): M = np.empty([j, j]) for x in range(1,j+1): for y in range(1,j+1): M[y,x] = y**(j-x) Minv = np.linalg.inv(M)The ##j^{\mathrm{th}}## estimate ##\mathrm{OP}(j,n)## which fits ##j## data...
  38. F

    Programs Condensed Matter PhD Program Choice - Advice Needed

    Hi, I don't want to be too specific here, but specific enough for relevant advice. I'm finishing a Masters in Physics and am lucky to have been made offers by 2 excellent institutes: a Max Planck Graduate Centre (MP), and at Oxford UK. Both are in experimental condensed matter; Weyl...
  39. Y

    MNCP5 error: Program Exception - stack overflow

  40. A

    Admissions Has anyone received an offer from the 2021 AFRL Scholars Program?

    I am a junior physics major, and I have applied to many summer programs this year. One of which is the AFRL Scholars program. I applied to Kirtland and Elgin. They said that offers will be extended through mid February to mid March. Did anyone apply to this program? If so, has anyone received...
  41. Wrichik Basu

    Python What's wrong with this Python program on Euler's forward algorithm?

    Here is the function that I have written: import numpy as np def ode_euler_forward(odefun, y_initial, x_range, num_steps): """ Solves a system of non-stiff ODEs using Euler's forward algorithm. Parameters ---------- odefun : callable(x, y1, y2, ...) The function...
  42. J

    Why is my program crashing when using multiple classes and pointers?

    Following my book, we are making a program with two classes: Message and Folder. The idea is that messages will be stored in a folder. The same message can be saved in multiple folders. In order to accomplish this, Message has a set of pointers to Folder that point to each of the folders that...
  43. J

    My destructor is causing my program to crash

    Below is my code. The include directives and the using std::* declarations have been removed for brevity: class HasPtr { friend void swap(HasPtr&, HasPtr&); public: HasPtr(const std::string &s = string()): ps(new string(s)), i(0) {} HasPtr(const string &s, const int &j) : ps(new...
  44. Y

    C/C++ Question on this program with exception C++

    I am stepping through the program and I actually wrote down the steps in comment each step the debugger step through. I have a few question I still don't understand. Here is the program: //Matching catch handler with exception #include<iostream> #include<string> #include<string_view>...
  45. D

    A The Langlands program and its connection to physics

    On wikipedia, it says that the Langlands program is a kind of "grand unified theory of mathematics." Does this program have any known connections to physics and in particular, quantum gravity?
  46. DanjoJojo

    Comp Sci Writing a Little Man Computer program to compare 2 integers

    I've attempted and I can retrieve a 0 when the first input is greater than the second using BRP. I can't seem to get the output of 1 if the first input is equal to the second input. I also don't get a 2 output with the first input being less than the second. I also have no idea how to loop a...
  47. J

    Please critique my program design

    I am writing a simple program for my wife and would like some critique on some general design decisions I've made. The program will be able to store a recipe she enters (in a .txt file), retrieve a recipe that she had entered in the past, and allow the input and retrieval of ingredient densities...
  48. nomadreid

    Strategy for scheduling with preference constraints

    A computer program that was supposed to handle this was bought and tried, and it made a mess of it, so the idea is that perhaps it would be easier to give a strategy to someone (computer savvy, but an amateur, not a professional ) to program (not requiring too much power of the computer on which...
  49. K

    Which Program for Drawing Statics & Dynamics Mechanicals and Setting Dimensions?

    Wich The Program (Software) Using To Draw Statics And Dynamics Mechanichal Same This 100% When Create This below Which Program Using ? And set Dimensions Thanks For All
  50. Hacker Jack

    Do you consider writing this program a bit of a challenge?

    Do you consider writing a program that takes 3 integer inputs and orders them in ascending order (accounting for same numbers) difficult? You can only use if statements (if, else if, else). I know there is some thing called "sort" that does the tedious work for you but do you find this simple...
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