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Easy Java Simulations

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Easy Java Simulations
Original author(s)Francisco Esquembre
Stable release
5.1
Written inJava
Operating systemMicrosoft Windows, Linux, Unix, Mac OS
Size23 MB
TypeScientific Software, Mathematical software
LicenseGNU GPL license
Websitewww.um.es/fem/EjsWiki/index.php/Main/WhatIsEJS

Old name ""EJS"" Easy Java Simulations or new name since 2014 EJSS, or Easy JavaScript Simulations, is an open-source software tool, part of the Open Source Physics project, designed for the creation of discrete computer simulations.

A discrete computer simulation, or simply a computer simulation, is a computer program that tries to reproduce, for pedagogical or scientific purposes, a natural phenomenon through the visualization of the different states that it can have. Each of these states is described by a set of variables that change in time due to the iteration of a given algorithm.

In creating a simulation with the help of EJSS, the user does not program the simulation at the level of writing code, instead the user is working at a higher conceptual level, declaring and organizing the equations and other mathematical expressions that operate the simulation. EJSS handles the technical aspects of coding the simulation in the Java programming language, thus freeing the user to concentrate on the simulation's content.

The generated Java code can, in terms of efficiency and sophistication, be taken as the creation of a professional programmer.

EJSS is written in the Java programming language and the created simulation are in Java. Java Virtual Machines (JVM) are available for many different platforms; a platform for which a JVM is available can run Java programs. Java offers the possibility of creating Java Applets, most browsers support Java Applets.

EJSS has its own format for storing the simulations, which is based on XML and carries the extension .xml. It contains not only the code for the simulation, but also the rest of the things, like the html introduction.

References

  • Francisco Esquembre, "Easy Java Simulations: a software tool to create scientific simulations in Java", Computer Physics Communications, Volume 156, Issue 2, 1 January 2004, Pages 199-204
  • Anne Cox, Computational Modeling in Intro Physics Labs: Tracker and EJS, 2009 American Association of Physics Teachers Summer Meeting
  • Loo Kang, Wee; Tat Leong, Lee; Charles, Chew; Darren, Wong; Samuel, Tan (2015), "Understanding resonance graphs using Easy Java Simulations (EJS) and why we use EJS", Physics Education, 50 (2): 189–196, arXiv:1501.01535, doi:10.1088/0031-9120/50/2/189