PHYSICAL REVIEW E STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS Editor IRWIN OPPENHEIM (Massachusetts Institute of Technology) Associate Editors Senior Assistant Editor Senior Assistants to the Editor NEAL ABRAHAM MARGARET MALLOY DEBBIE BRODBAR (Bryn Mawr College) MARGARET FOSTER Assistant to the Editor VALERIE L. MILLER BRANT M. JOHNSON JOANNA POPADIUK (Brookhaven National Laboratory) Editorial Assistant GARY T. BEDFORD GERALD HEDSTROM (Lawrence Livermore National Laboratory) KATEPALLI R. SREENIVASAN (Yale University) EDITORIAL BOARD Term ending 31 December 1997 Term ending 31 December 1998 Term ending 31 December 1999 J.J. BISOGNANO-beams physics D. CHANDLER-chemical physics I.B. BERNSTEIN-plasmas M.C. GUTZWILLER-statistical physics J.R. DORFMAN-statistical physics Y. KURAMOTO-nonlinear physics A. LEONARD-fluid dynamics P. MANNEVILLE-nonlinear physics, F.E. MOSS-biological physics I. KANTER-neural networks hydrodynamics J.F. NAGEL-biological physics S. 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