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January 1993

PARALLEL PROFILE

Lennart Johnsson

Hugh Roy and Lillie Cranz Cullen Professor of Computer Science, Mathematics, and Electrical and Computer Engineering, University of Houston

Lennart Johnsson's research interests are in the areas of parallel computer systems architecture and their runtime systems, and large-scale applications in science and engineering. He currently leads research projects in computer communications network routing, data parallel Fortran benchmarks, and fast algorithms for problems with applications in astrophysics, computational chemistry, and electromagnetics. He also heads a project on parallel implementation of fast Legendre and spherical transforms and network routing.

Johnsson joined the University of Houston in 1995 as a professor for both the College of Natural Sciences and Mathematics and the College of Engineering. Soon after joining the university, Johnsson began collaborating with CRPC and Computer Science Department researchers at Rice University on High Performance Fortran (HPF), virtual reality, and distributed, collaborative work. This led to the formation of the Houston Area Computational Sciences Consortium (HACSC), which garnered an NSF award for high-performance computer connections to the very high speed Backbone Network Service (vBNS) (see "Research Focus"). Early this summer, the University of Houston was named a CRPC affiliated site, with Johnsson serving as site leader (see "University of Houston Becomes CRPC Site").

Prior to joining the University of Houston, Johnsson worked at Thinking Machines Corporation for eight years, where he was director of computational sciences. He initiated the design of a register-oriented instruction set for the Connection Machine systems CM-2 and CM-200 and led the development of the Connection Machine Scientific Software Library (CMSSL), the first comprehensive, commercial-strength, scalable scientific library for the CM-2, CM-200, and CM-5 systems.

Johnsson serves as Chair of the Scientific Board at the National Center for Parallel Computation at the Royal Institute of Technology in Stockholm and as Director of the Texas Center for Computational and Information Sciences. He has held appointments at Caltech, Yale University, and Harvard University, where he introduced the first courses in parallel computation. He has authored or co-authored more than 100 journal and conference papers, served on several program committees, and has been a board member of the Computer Research Association (CRA) and the Universities Space Research Association's Science Councils for the Institute for Computer Applications in Science and Engineering (ICASE) and Center of Excellence in Space Data and Information Science (CESDIS).