Simulation Definition and 816 Threads

Homework Statement Hello all, this is my first post here although I've used this site for referencing several times. My question is regarding an 8:1 multiplexer. I need to write a c program using just &&, || and ! to simulate each gate of an 8:1 mux. We have 3 control inputs and 8 source...

I mean, why there are so many speculations? It must be 'shut up and press enter' :) For example, some people say that the second horizon in the Kerr black hole is not dangerous. Others claim that due to infinite concentration of energy there there is a real singularity there so everything...

hi friends, I'm going to simulate the spectrum of a specific ion, with constant situation (like: density, temperature and etc). but I don't know what should I do first! thanks for your help :frown:

Hello, I am attempting to build a single axis inverted pendulum using a PID system to keep the rod balanced. I am interested in writing a program to simulate the rod tipping over and the effects of moving the base (pivot point) left or right to counter the tipping effect. I can't quite...

Man, I just found this video on youtube and the 3D effect is absolutely amazing... imagine playing a 3D shooting game with that! Furthermore, the effect can be done with very low cost as demonstrated in the video... here is the video https://www.youtube.com/watch?v=Jd3-eiid-Uw

it is interesting i could not find many particle-particle simulators that simulate electrical fields even thought dynamics is pretty similar to that of planetary orbitals. there are few i could find but they are mostly 2D and defining problem in mathematical/geometrical terms, with sin/cos or...

I am attempting to simulate the 4017 chip in multisim but I am not getting the expected result. I doubt that multisim is incorrectly simulating the chip, so I think that I am probably just hooking it up incorrectly. http://www.doctronics.co.uk/4017.htm"...

Hi Guys, I need to design something that will isolate our DAQ (Data Acquisition Card) for a basic simulation we need to do. I was thinking about designing a mosfet switch, where the DAQ sends some voltage to the gate above the threshold voltage to turn the MOSFET on and 0 V to turn it off...

Hi Does someone have successful experience working with GNU/open source circuit simulation tools in Linux? I tried gEDA, but it did not work well for me. If you've been successful in using such software, please write back with detailed experiences here. I use Microcap for my undergraduate...

Hi I am working on a project to do a coil simulation using COMSOL to determine inductance and resistance variations with frequency. I have a CAD file for the geometry but I need help because I am having serious difficulties with the rest. Can anyone help pls? thanks alot

Hi, I have a little problem. I recently got the nerve to try and teach myself all of the physical properties necessary to program a physics engine (the insomnia is a DIFFERENT problem). It's going much better than I could've hoped (considering I started a few days ago). My knowledge of physics...

Homework Statement http://img399.imageshack.us/img399/4277/cartyf8.jpg http://g.imageshack.us/img399/cartyf8.jpg/1/ Homework Equations Euler's Method, Runge Kutta 4th Order Method The Attempt at a Solution I have solved the motion equation for the above question using Euler's Method and...

Hello, I am trying to implement a simple simulation of a point mass connected to a linear and to an angular spring. I thought this would be very easy, basically just integrating these two equations: mr''=-k_l(r-L)-c_lr' m\theta''=-k_a(\theta-\alpha)-c_a\theta' These are in polar...

Hi, I wonder if there is a Density Functional Theory or Hartree-Fock Theory based atomistic simulator that can be used to simulate nanoelectronic devices for example nano-scale field effect transistors? I looked at the documentations of SIESTA and other DFT software listed at...

hi, I am preety new in this field so I need some help about Comsol sw. I would like to perform a simulation but as I am not a physicist I have no idea how to. So, if anyone can help me, I would be very happy. OK. I would like to simulate the drop of liquid(water) which falls into a liquid...

Does anyone know how to simulate the pulse laser drilling? I am trying to use Comsol or MATLAB to simulate the laser interaction with a specified piece of material. Following, plot the time (X axis) versus temperature (Y axis) diagram to see the temperature distribution. Any help in...

Hi, I am a computer science student in my final year, and preparing myself for my graduation project (GP). Please check this video: http://www.youtube.com/watch?v=d7eGypGOlOc" This program is from MIT and it is called "A Shrewd Sketch Interpretation and Simulation Tool". I am planning...

I have a simple circuit 2v supply R and Diode in Pspice that I'm trying to run a simulation on. I get the following message. "This action cannot be completed because the other program is busy. Choose 'Switch To' to activate the busy program and correct the problem." I have no idea what the...

Hi everyone, Does anyone know what simulation software to learn fundamentals of fluid mechanics for beginner student of mechanical engineering like I can create it by my own? Thanks in advance Huygen

I posted this topic in a physics forum on another web site, but I thought this forum might be a better place to get good answers. So the other week, I tried writing an applet (using the new Javascript Canvas Firefox now supports) to simulate a thought experiment I use to explain the basics of...

I am looking for a way to evolve a wave function in one dimension. I tried searching already but couldn't find anything. Basically I have: V[x] gives the potential at x Psi0[x] gives initial conditions on wave function for each x I would like to calculate Psi[t,x], the wave function at...

So I have been further researching possible career paths with a degree in math that would suit me, and I came across the idea of modeling and simulation for national defense (for example...

Hi, Everyone. I am new to electronics in general so I have a rather uninformed question. It seems that a lot of circuits out there are presented "as is" without necessary mathematical calculations. When I took my physics, we were taught KCL, KVL, RLC etc. I enjoy deriving circuit behavior...

[SOLVED] RK4 in solar system simulation (n-body problem) Hi, I'm making a simulation of the solar system and have so far been using euler's method to integrate my equations of motion - and i'd like to upgrade to a 4th order runge-kutta method. I'm having a lot of trouble understanding the...

Hi, I'm making a car simulation game not just a simple one, one that closely matches the kinds of Gran Turismo, therefore, it has to be extremely precise and realistic and use real life physics. I have been searching around for information regarding this subject and was able to get some...

Anyone know some decent free software for simulating microwaves in full detail? Ideally I'd like to input autocad drawings to it, of metallic structures, and see the power distribution in 3D.

Hey all, I'm looking for some suggestions on topics concerning Molecular Simulation which I can research. I've been tasked with giving a talk and writing a report on one specific topic of this field but I'm unsure what to specialise in. Any and all advise and suggestions would be appreciated!

Similar to Interactive Physics 2005 but "better". I never said I would purchase/download an unlicensed copy so mods there is no need to delete this topic.

hi, srr if this isn't the wright place to post this... I'm working on engine (i'm a programer , c++) and I'm stuck at bouncing... I have an object (repressented by a sphere) at an unknow hight, with an unknow mass and I drop it, so gravity does it job and it starts to fall down now...

Hi! Does anybody here have experience with the FEMM simulation software? Its pretty popular in the engg community. I basically use it for simulating magnetostatic problems. If you do (and if this is the right forum, it is EE after all), could somebody tell me how I can do transient...

Caveat 1: I'm not sure if this message should be posted here, or in the Programming forum. Caveat 2: I have a BS in Physics, obtained more than a decade ago, but never actually worked in the field. So I'm a bit rusty. :redface: OK, more than a bit. I am writing a program to simulate the...

Hey everyone, I'm knocking my head against something and for some reason I can't get it to work out -- I'm running an N-body simulation which uses an internal gravitational constant of 1, meaning that the timestep used is a function of the units of mass, length, and velocity. But I don't know...

Let's assume we live in a simulation, but for whatever reason the physics of it are not modeled perfectly. Perhaps the computing power is insufficient to reproduce everything with 100% accuracy. Let's say that as you look at smaller and smaller things, the simulation begins to give...

List here all the free physics simulation programs. I am trying to find particle physics simulation programs, plasma and fusion physics simulation programs and magnetic and electric field simulation programs. What program should I use to simulate...

As in, alternatives to programs such as AutoCAD, Solidworks, etc.

Incompressible Fluid simulation - SPH doesn't work :( Hello all, I've been stuck in my project: Fluid Simulation using Smoothed Particle Hydrodynamics for a few days now. I do understand the core principle that fluid properties are calculated by integration on kernel W with range h. But...

Hi every body I really need to learn about panel methods in aerodynamics Can anyone help me on this ? Some guides and especially a simple code about this method can be very helpful for me I appreciate your time and consideration my E-mail is casy_sms@yahoo.com with regards

im currently looking for ping pong physics simulation in the web for my research.. i can't seem to find any which are useful.. im lookin for those that includes how the collision detection and modeling was handled, prog lang used, and graphics API for rendering(most i see are OpenGL), and the...

I have got this circuit. http://img225.imageshack.us/img225/4369/circuithf1.jpg Threshold voltage of the n-channel MOSFET is 2Volts. RVAR varies from 0.5k\Omega to 2k\Omega. When I simulate the circuit, I get: http://img132.imageshack.us/img132/2779/simulationuw4.jpg It should go into...

This might not be the best place to put this post but still i would like to know about some good softwares which are used to: 1.Simulate the flow in intake manifold. 2.Simulate the engine performance.

Hi, I've got a list of particles (where each particle has it's coordinates in space and velocity) these particles can interact with each-other (f=\frac{a}{r^4}-\frac{b}{r^8}) (i'll add 6 - 12 soon too) anyway, as it is now, the program has a complexity of O(\frac{n(n-1)}{2}) because every...

Simple gradient question.. I have a kernel function that determines the influence of each water droplet given a radius r: (10/pi*h^5)*(h-r)^3 The gradient of that is: (-30/pi*h^5)*(h-r)^2 But 'r' is not a vector, its a scalar, its just the distance to the point in question. So how do...

Hello, As with a lot of people, I have been excited and fascinated by the field equations Einstein described, revealing the curvature of spacetime. I would like to create a computer simulation which simulates the effects of the Einstein Field Equations, in other words, the curvature of...

I've written a couple of small physics simulations in the past (hey, everyone has to have a hobby) and now I'm trying to write something a little more complex so decided to attempt to write an program that simulates the motion of the planets and moons in our solar-system entirely procedurally -...

Hi My name is Pete and this is my first post. I'm a few months away from finishing a degree in mathematics. I'm planning to program a simulation of near light speed travel (not for school, just for personal interest). I'm looking to understand this topic better. I went to a seminar on...

Hi, I'm having a problem while running a simulation of a Bridge Rectifier on PSpice. This is my circuit schematic: http://img521.imageshack.us/img521/276/q1tasks2schematicsxp3.jpg Vs is at 15sin(100*pi*t). And this is the input and output waveforms plotted by PSpice...

http://www.math.columbia.edu/~woit/wordpress/?p=586 Maybe it's well-known that a group in Holland (at the Utrecht Institute for Theoretical Physics) have been running simplicial-model Monte Carlo simulations of the universe. So far they have generated literally millions of different...

hey i was wondering, if there happened to be a North Korean - French conflict that there would be no economic sanctions on both countries that all other countries stay neutral who would have the advantage ? i know France has a small army, but modern 1 aircraft carrier (2 in 2015), nuclear...

Has anyone seen a traffic flow simulator, or used a program similar to this? I would like to simulate the effects of slowing traffic speed limit in a major city, and see what effect it would have on the motorways, maybe the software is all ready in use some where?

I am looking for a free Electron diffraction simulation software/program (Windows-based software). Please let me know where to download! Thanks! :!)