JSim Home Page

JSim is a Java-based simulation system for building quantitative numeric models and analyzing them with respect to experimental reference data. JSim's primary focus is in physiology and biomedicine, however its computational engine is quite general and applicable to a wide range of scientific domains. JSim models may intermix ODEs, PDEs, implicit equations, integrals, summations, discrete events and procedural code as appropriate. JSim's model compiler can automatically insert conversion factors for compatible physical units as well as detect and reject unit unbalanced equations. JSim also imports the SBML and CellML model archival formats.

JSim downloads are available as precompiled binaries (Linux, MacIntosh, Windows) or source code. JSim can also run as an applet within your web browser. JSim is provided free for non-commercial use as a public service by the National Simulation Resource at the University of Washington.

Getting oriented:

JSim overview : what JSim does and how it is structured.
Introduction to the JSim GUI : an step-by-step introduction to using the JSim graphic user interface.
Introductory Survey of MML : writing models with JSim's Mathematical Modeling Language.

Related software:

J4: Java-based quantitative medical imaging system.
I4: J4's predecessor imaging system.
XSIM: JSim's predecessor simulation system.
More ...

The JSim Development Team

Dr. James Bassingthwaighte: jbb2@u.washington.edu

Questions about NSR and our scientific mission.

Gary Raymond: garyr@u.washington.edu

Questions about basic JSim operation.
Questions about specific models on the NSR or Physiome web-site.

Erik Butterworth: butterw@u.washington.edu

General problems with NSR user accounts and the NSR web-site.
JSim Bug Reports.
Questions about JSim internals, development priorities, coming features.

[This page was last modified 13May08, 1:04 pm.]

Model development and archiving support at physiome.org provided by the following grants: NIH/NHLBI T15 HL88516-01 Modeling for Heart, Lung and Blood: From Cell to Organ, 4/1/07-3/31/11; NSF BES-0506477 Adaptive Multi-Scale Model Simulation, 8/15/05-7/31/08; NIH/NHLBI R01 HL073598 Core 3: 3D Imaging and Computer Modeling of the Respiratory Tract, 9/1/04-8/31/09; as well as prior support from NIH/NCRR P41 RR01243 Simulation Resource in Circulatory Mass Transport and Exchange, 12/1/1980-11/30/01 and NIH/NIBIB R01 EB001973 JSim: A Simulation Analysis Platform, 3/1/02-2/28/07.