The program is in the file init.m, a Mathematica package. There is also a documenting Mathematica notebook howtouseDDsim.nb that includes "live" worked examples.
You need Mathematica to use this package. Mathematica is published by Wolfram Research Inc. For information on Mathematica, you can e-mail to info@wri.com. The package was written and used with version 2.1 of Mathematica. It has been converted into a package in Mathematica 4.0.
To use, create a folder called "DDsim" (case is important), and place
all three files in it. Then put the folder in the Extra Packages folder
in the Add-Ons folder in the Mathematica folder -- it must be there for
Mathematica to find the package when it is called for. Open the notebook
for a fully worked example.
Alan Grafen 11th February 2002