This report was written while I was a visiting researcher (1996/97) with the Swarm Project Group at the Santa Fe Institute. This visit was made possible by generous support from Dublin City University and the Swarm Project. Swarm has been supported by Grant No. N00014-94-1-G014 from the Department of the Navy, Naval Research Laboratory, acting in cooperation with the Advanced Research Projects Agency. Swarm has also benefited from earlier support from The Carol O'Donnell Foundation and from Mr. and Mrs. Michael Grantham.
I am indebted to the School of Electronic Engineering in DCU (particularly through the agency of its Head, Charles McCorkell) for continuing encouragement.
All errors remain, of course, my own responsibility.
The html version of the article could not have been created without the benefit of the LaTeX2 HTML translator developed by Nikos Drakos and the Harvard extensions for author/date citations developed by Peter Williams and Thorsten Schnier.
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Timestamp: Tue Dec 31 19:40:38 GMT 1996