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**Christopher Johnson** received his Ph.D. from the
University of Utah in 1989. He is an Associate Professor in the Department
of Computer Science at the University of Utah. His research interests are
in the area of scientific computing. Particular interests include inverse
and imaging problems, adaptive methods for partial differential equations,
numerical analysis, computational problems in medicine, and scientific
visualization. In 1992, Professor Johnson was awarded a FIRST Award from
the NIH, a National Young Investigator (NYI) Award from the NSF in 1994,
and the Presidential Faculty Fellow (PFF) Award in 1995. He directs the
Center for Scientific Computing and Imaging (SCI) at the University of
Utah.

**Robert S. MacLeod** received both his B.Sc. ('74) in
Engineering Physics and his Ph.D. ('90) in Physiology and Biophysics from
Dalhousie University. His M.Sc. ('85) in Electrical Engineering came from
the Technische Universität, Graz, Austria. He is an Assistant
Professor in the Department of Internal Medicine (Div. of Cardiology) and
Dept. of Bioengineering at the University of Utah, and a member of the
Nora Eccles Harrison Cardiovascular Research and Training Institute. His
research interests include computational electrocardiography (forward and
inverse problems), experimental investigation and clinical detection of
cardiac ischemia and repolarization abnormalities, and scientific
computing and visualization.