Verlag des Forschungszentrums Jülich
JUEL-3533
Our results can be applied or reproduced only if programs are available which
perform the corresponding tasks. Although we made considerable effort in our
publications to give the full information necessary for others to reproduce our work,
it is hardly to be expected that someone would undergo the time consuming and
unnecessary task to reconstruct these programs.
In experimental science it is standard to publish instrumental details in journals
of scientific instrumentation. We feel, that in the overlapping region of numerical
and mathematical physics an analogous tradition should evolve. This report and the
availability of our programs on a server
http://www.fz juelich.de/iff/theoryl/duffing/index.html is a step in this direction.
We invite colleague to use, modify and apply our programs under the terms of the
Gnu Public License (see section "License Agreement" on page 216). For full
publication in a scientific journal the material is obviously too voluminous.
Moreover, not all of these programs were originally conceived for use by others;
some of them are poorly commented. Thus, we choose to make this material available
in the form of an internal report, which can be ordered from the Forschungszentrum
Jülich GmbH.
Eilenberger, Gert; Schmidt, Klaus
A program suite for the analysis of Duffings equation
223 S., 1998
In a series of two publications, we have presented new ideas and methods to better
understand and handle dissipative, forced nonlinear oscillators (Duffing type systems)
analytically [1] and numerically [2] for a certain parameter regime (a more detailed
account was also given in [3] in German). In the course of this research a suite of
programs for manipulation of formulae and numerical implementation and execution of
these have been developed, which have been used for our publications.
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Heike Lexis
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zb-publikation@fz-juelich.de