Education Prize Logo
Science SPORE Prize
November 2011

NSF Logo
The Open Source Physics Project is supported by NSF DUE-0442581.

Ejs Duffing Baker’s Map Model Documents

Main Document

Ejs Duffing Baker’s Map Model 

written by Juan Aguirregabiria
edited by Wolfgang Christian

The Ejs Duffing Baker's Map model computes the solutions to the non-linear Duffing equation, which reads, x'' + 2γ x' - x (1 - x2) = f cos(ω t), where each prime denotes a time derivative.  The simulation displays N2 Poincare plots each separated by the same phase angle.  The evolution parameters can be changed via textboxes.  You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.  

Ejs Duffing Baker's Map model was created using the Easy Java Simulations (Ejs) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_ehu_chaos_Duffing_Baker.jar file will run the program if Java is installed.  Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models.  Additional Ejs models for non-linear dynamics and chaos are available.  They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

This file is available in multiple formats: .jar, .zip

Last Modified June 5, 2014

This file has previous versions.

The OSP Network:
Open Source Physics - Tracker - EJS Modeling
Physlet Physics
Physlet Quantum Physics