PAS Adds Chaos Data Analyzer Software to Expanding Chaos Series

Physics Academic Software Releases CHAOS DATA ANALYZER

October 12, 1992--CHAOS DATA ANALYZER is a research and teaching tool for
the IBM PC consisting of 14 programs that detect hidden determinism, or
chaos, in seemingly random data. It can analyze a record of up to 16,382
data points using time-series analysis and employs a novel technique using
singular value decomposition to construct a set of model equations whose
solutions predict the next few terms in a time series.

Developed by Julien C. Sprott, University of Wisconsin, and George
Rowlands, University of Warwick, CHAOS DATA ANALYZER provides tools that
enable you to determine the properties of equations underlying chaos.
These tools include calculations of the probability distribution, power
spectrum, Lyapunov exponent, and various measures of the fractal
dimension. The data can be displayed in many ways, including time records,
phase-space plots, return maps, and Poincare movies.

Because of its versatility, CHAOS DATA ANALYZER can be used as a lecture
demonstration, research tool, or student tutorial in a course on nonlinear
dynamics. Users at all levels will find it easy to move from one analysis
to the next. In addition, they will value the automatic mode, which
performs all tests in sequence and summarizes the results efficiently.

Data can be read in from the user's disk file or can be produced by the
companion program CHAOS DEMONSTRATIONS, another PAS package developed by
Sprott and Rowlands. CHAOS DATA ANALYZER includes sample data files as
well.

Reviewers are enthusiastic about CHAOS DATA ANALYZER. "It is a good
teaching tool that gives a wide variety of information useful in analyzing
potentially chaotic data," says Eric T. Lane, University of Tennessee,
Chattanooga. "CDA takes chaos out of the realm of textbooks and computer
simulations and brings it into a wide range of everyday settings," says
Joseph G. Harrison, University of Alabama, Birmingham. "The ability to
create your own input data is a very useful feature." And James B. Harold,
University of Maryland, comments, "The program provides the user with a
powerful collection of chaos-oriented analytical tools."

CHAOS DATA ANALYZER is the fourth chaos program to be published and
distributed by Physics Academic Software, which is a project of the
American Institute of Physics in cooperation with the American Physical
Society and the American Association of Physics Teachers. The other titles
include CHAOS DEMONSTRATIONS, also by Sprott and Rowlands; CHAOS
SIMULATIONS, by Alan Wolf and Tom Bessoir; and CHAOTIC DYNAMICS WORKBENCH,
by Roger Rollins. All are part of a continuing series of educational
software from PAS.

CHAOS DATA ANALYZER operates on IBM PC, XT, AT, and PS/2 personal computers
with at least 512K of RAM memory and CGA, Hercules, MCGA, EGA, or VGA
graphics. A math-coprocessor and a graphics-capable printer are
recommended.

CHAOS DATA ANALYZER may be purchased for $99 .95 plus $3 .50 shipping and
handling . Lab Packs, which include ten copies of the software and one
User's Manual, are available for $299.95.

For a limited time, you can purchase the entire PAS collection, with or
without Lab Packs, and save up to 33% off the regular price. Physics
Academic Software offers a no-risk guarantee by providing a full refund
for packages returned within 30 days.

PAS also offers a Standing Order Plan, which brings the latest in
innovative physics courseware to your door, along with exceptional
savings. When you join the Standing Order Plan, you will automatically
receive each new PAS program, with or without Lab Packs, and save up to
33% off the list price.

Orders and requests for a free catalog of all Physics Academic Software
titles should be directed to The Academic Software Library, Campus Box
8202, North Carolina State University, Raleigh, NC 27695-8202. By
telephone, call (800) 955-TASL or (919) 515-7447; FAX (919) 515-2682.

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