Simulation Definition and 816 Threads

Hello, my colleague has a problem. He has a Monte Carlo simulation written in C. But his program gives different outputs in case he compile it using g++ or icc. He has nothing changed in his source. He is using standard random number generator drand() with initialization srand((unsigned) time...

I need to do a rifle recoil simulation to some weapon sights. I have two of them. One weighs 2.2 lbs and the other 2.6 lbs. I need them to be going 2.2 meters a second when the hit the ground. How high do I have to drop each one?

Of all our learning of the natural world we have come up with many universal constants. How things interact and such. Whos to say we couldn't make a computer program with these laws in a space and let it go. Disregarding the fact that the memory and computation speed of the computer would be...

Hi, It is my first encouter with Pspice program. I want to simulate a RCL circuit to see how it react at different frequencies. I made the circuit and create a netlist. The circuit has no errors( when I look at the output file) but I don't know what to do to produce a curve. please can...

Homework Statement Simple Pendulum using Forces (Computer Simulation) Max theata = PI / 6 Force Of Gravity is { 0, 10 } Force_Tension.x = - 10 * sin(balls.theata); Force_Tension.y = - 10 * cos(balls.theata); Homework Equations accelleration = Force_Tension -...

hi there, i am currently developing a vehilce simulation model using MATLAB simulink. The simulation requires a vehilce to be simulated traveling around a simple race track. the vehilce model itslef has already been created and have all necessary vehicle input data for the simulation. the...

I want to simulate a permanet magnets separator. I need to know the attraction force betwen the magnets and some materials like iron. I don´t know what software i have to use. Thank you for any help.

Hello all, for the past few weeks my friend and me have been working on a project involving simulation of orbital objects interaction. For example, one could see how everything looks if he/she entered all the details about the objects (that is: mass, position and velocity vector). The...

Hi.. I am trying to create a car crash simulation. what i want to do is to simulate two cars crashing and calculate the damage that was induced on both cars with the given speed, mass etc. part 2 of that simulation is an enhancement on car A. I would put beams on the doors of the cars to lessen...

Nuclear Simulation- Beta Decay ?? Hi, I'm a high school sophomore, I'm having trouble finding a suitable trigger for beta decay in my nuclear simulation (for fun) :confused: :cry: :confused: . I have the strong force and electromagnetic forces all set but I've run into the problem of atoms...

I need some help with some statistics stuff. Right now I need it to understand one particular discussion in a poker forum, but I also think that this is a good opportunity for me to learn these things better. That's why I'm posting my questions here instead of in the poker forum. Someone...

I am trying to simulate the performance of a web booking/scheduling system and although there are many features of this problem that intrigue me the one currently giving me fits is demonstrated below. Assume that a dentist has 8 appointments per day and that each appointment time is equally...

[PLAIN]www.sodaplay.com[/URL] www.strandbeest.com Sure u guys saw these .. my question .. is there any software available to simulate stuff like this with the view to make a real, working model? Thanks guys ..

Can anyone help me with some video simulations on vibrations in single degree of freedom system like the one in the link below...

I am using hspice right now and I have to say that it is not the most intuitive thing in the world. What other softwares like spice are out there? Which ones do you guys use for simulating a circuit that you made?

I need some help designing a Digital elevator simulation using multi media logics. I need some help and guidelines as to how I should get the thruth diagrams, kmaps and the circuit going. I am required to design a digital circuit which has applications in elevator style controls. My circuit...

Magnetic Field Simulation Software ? -- Updated I'd like to run some simulations of AC magnetic fields and several ferrite geometries. I can write the simulations myself, but would much prefer to save the time and just use a canned program if it will let me do what I want. Has anybody had...

I'm trying to simulate this ciruit on microsim schematics: http://i75.photobucket.com/albums/i281/esmeco/amplifier.jpg This's what I've got so far: http://i75.photobucket.com/albums/i281/esmeco/Microsimcircuit.jpg What I want to see is the final graph with the values of V0,V1,V2.V1...

Does anyone know of a good reference regarding solving the Tolman-Oppenheimer-Volkov equations for neutron stars? Most things I find are either too elementary and others skip multiple steps. I think the EoS to use should be that of a Fermi gas model, but I am not sure.

Hi, I am working with a juggling simulation to better my understanding of projectile motion. However, I encountered a slight problem. To my understanding, an initial y velocity and an initial x velocity are independent of each other. A y-velocity affects the height of how high the ball...

hi all, I return to post after about a year. one of the acknowledged loopholes in the bell experiments is how the coincidence circuitry behaves under what might be called "simultaneous H/V measurements" where H/V represent horizontal/vertical polarized photons at one arm. basically, if you...

current issue of SCIENCE http://www.sciencemag.org/cgi/content/short/313/5792/1413 Exotic Earths: Forming Habitable Worlds with Giant Planet Migration Sean N. Raymond, Avi M. Mandell, Steinn Sigurdsson "Close-in giant planets (e.g., "hot Jupiters") are thought to form far from their...

Hi, I'm trying to solve an electrowetting problem, by using the finite element Galerkin method. The problem is to find simultaneously the shape of the liquid drop and the distribution of potential in electrode and air. I've calculated the residuals for the potential u (Ru), in both air (Ru2)...

May as well announce my Java applet that simulates Newton's law of gravitation. The initial conditions are set to give a demonstration of conservation of angular momentum. That is, 8 test masses are launched, all with the same angular momentum, and their orbits cross on the other side of the...

I am trying to define the sensitivity of a piezoresistance as a function of temperature using PARAMETERS. The equation is: {S=S0(1-TCS(temp-25))}. The problem is that "temp" doesn't change during a Temperature Sweep, but I don't have any error either. Could you help me?

http://www.nasa.gov/vision/universe/starsgalaxies/gwave.html

Came upon the following article: http://www.simulation-argument.com/simulation.html Granted, there are some other approaches to the these metaphysical questions (string theory for instance) but... will it actually reveal the meaning of life or maybe finally discover GOD or refute his...

Hi! I'm about to start an acoustic analysis of the local shooting range. The range is (as every other range in sweden) about to be forced to shut down since it's not PC to practice shooting in sweden. However, the official reason is that the sound pollution is to great. Im interested...

(unrelated to my other post about an asteroid) 1] I would like to check a postulation with someone who has an orbital simulator, or a good head for orbital mechanics. Given an object such as a comet with orbital period of about 150 years, could it have a perihelion at a distance between...

If we understand the possible origin of life very well, we could model it on a supercomputer using known physical laws. Physical laws can be used to trace a pathway forwards and backwards in time as astronomers do when predicting the motions of the planets, or tracing back previous postions...

We had a project in PHYC 2050 to write an applet simulating a scientific model. Me and my partner chose the solar system, which was a step up from the other projects (ideal gas law, refraction :biggrin: ). We took into account inter-planetary actions and used a simple "assume force is contant...

I have a simple question about AC/DC. I expected a circuit with a given DC voltage to be equivalent to one with an AC voltage whose value (peak-to-peak) is the same (at least theoretically). For 10 V DC, I get a load voltage of 1.6667 V, whereas 10 Vp-p AC gives 1.6602 V (simulation). Are there...

I'm currently learning spice. I need help with a very simple circuit. http://www.ibiblio.org/obp/electricCircuits/Ref/01004.png Here is the netlist: Example netlist v1 1 0 dc 15 r1 1 0 2.2k r2 1 2 3.3k r3 2 0 150 .end When I run it in spice(2g6) I get: ******* 12/04/10 ******** SPICE...

I'm playing matchmaker again. A guy on another board (ADP) is doing research for a story about a near-miss asteroid and he wants to get his physics right. I am strongly suggesting he do a proper simulation so he's got his numbers straight. Would anyone with the right software be willing to...

I'm building a spacecraft attitude control simulation and I'm looking for some references to help me build a realistic mathematical model. Could someone please help me? I'm testing an AI library I built and that is requiring a lot of research in itself. Thanks for your time! Jeff

I'm looking pneumatic/hydraulic simulation software. Anyone know any good ones? It would be nice if they had a trail version also. --thank you.

I am disappointed and a little alarmed to find big discrepancies between simulator software. Following advice from https://www.physicsforums.com/showthread.php?t=84458", I tried simulating the same date: May 5 1975 with three simulators: http://www.fourmilab.ch/cgi-bin/uncgi/Solar"...

Hello, My first post and it's going to be a question =) I hope I can get some replies. Here we go :- I'm constructing a simulation of a motorcycle with rider and I have encountered a problem with oscillation (lack of stability) that I just can't find a solution for. Basically the bike will...

I'm modelling an induction machine used as a fast-response drive that provides on-demand additional power to a manually operated lever. My problem is I have no fixed operating point, the motor operates at high speeds but only for a maximum of 10 seconds at a time. I'm also modelling this out of...

This is the value after i calculate ,but use multisim to simulate this circuit,i get a answer different completely with the calculate answer.Example the Vout,also is most importent value,the calculate answer is -2.1V,but the answer of simulation is possitive value!y will like this?It i use the...

Does anyone know any good software to calculate the need for cooling/heating and such in builidings? One where I can change properties of almost every building aspect, such as wall-thickness, insulation, sun conditions, windows, outside temp, inside temp, and so on to find the energy needed to...

I am working on creating a simulation of beats. I need to start with: (where w is angular frequency), w1 + w2 = w1,2 then w1,2 + w3 = w1,2,3 then w1,2,3 + w4 = w1,2,3,4 and so on, to create a wave packet where I will plot w1,2,3,4...n. My problem is that I do not understand how to...

Okay, I've got this problem in my Chemistry class. It's about half-lifes and all that. If this is the wrong place to post this, then somebody can move it I guess. I've got a 10.0 g sample of an unknown. They give me the following info, wanting me to plot it on a graph. That's the easy...

Ive been thinking a lot and come nowhere, is it possible to create a program with a 2D envirment where the temperature change from place to place and make the computer calculate a current in the fluid? if so how would the mathematic look like then?

Is it theoretically possible to simulate a quantum computer by a real one (ie a Turing machine equivalent) even approximately? Any comments? Sorry if this has already been discussed. :confused:

HI and Hello, i would like to simulate a plasma discharge (z-Pinch discharge) with the Femlab Software 3.1i. The resulsts should be the density of the plasma or the temperautre after a compression. As input parameter serves the measured time dependent current. I have tried the...

I need badly some materials or instructions on how to simulate fluid flow or similar/related things to finish my research in the next 3 months...Do you know where I can find some to read, or places where I can download source code ?? Anything about it is really fine, how to simulate is also...

Hi, I´m looking for a program (free or cheap download) that can simulate the nearfield of a coil/ field of inductive antennas preferably in 3D. Does anyone know if such a thing exist? t.

I'm looking for some options for good circuit simulation and design software (for electrical systems and electronics). We use OrCad (PSpice) at school, but I find it very messy. Is there a program that is both easy (and logical) to use, yet powerful and flexible? Any suggestions and...

Need a check on this one please. In an Atwood Machine simulation, m1 is 1.0kg and m2 is 1.1kg. m2 rests on the floor that exerts a normal force, Fn, on m2. when the system is in equalibrium, the tension, T, in the rope at 2.54s is 9.789. If Fn +T- m2*g = 0 then Fn = .991. Is this correct?