Yuan-Ping Pang Computer-Aided Molecular Design Laboratory, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905 (pangmayo.edu). Dr. Pang received his B.S. degree in physical chemistry at Amoy University in China, his M.S. degree training in neuroscience and biochemistry at the Shanghai Institute of Physiology in China (with Li-Jun Chen), and his Ph.D. degree in synthetic chemistry at the University of Pittsburgh (with Alan P. Kozikowski). He then embarked on a 1-year sabbatical study in computational chemistry at the University of California, San Francisco (with the late Peter A. Kollman). Since 1991, he has been working on the development and application of special-purpose computer hardware and software, as well as novel methods for drug discovery at the Mayo Clinic, and he is currently a professor of biophysics and pharmacology and the Director of the Computer-Aided Molecular Design Laboratory at the Mayo Clinic. His research is supported by the Defense Advanced Research Projects Agency (DARPA), the U.S. Army Medical Research Acquisition Activity (USAMRAA), the U.S. Army Research Office of the U.S. Department of Defense, the National Institutes of Health, the High Performance Computing Modernization Program, the State of Minnesota, and the Mayo Foundation for Medical Education and Research.

Timothy J. Mullins IBM Systems and Technology Group, Development Laboratory, 3605 Highway 52 North, Rochester, Minnesota 55901 (mullinsus.ibm.com). Mr. Mullins is a member of the IBM Systems and Technology Group Development Laboratory in Rochester, Minnesota. He is involved with collaborations that develop high-performance computing life sciences applications for advanced technologies such as the IBM Blue Gene/L supercomputer and the Cell Broadband Engine** accelerator chip. He has a breadth of experience in computer systems design and development, especially in areas relating to performance modeling and analysis of products involving supercomputers, large server systems, network processors, and system-on-a-chip designs. He has held positions involving system design and architecture, CPU design and timing analysis, uniprocessor/multiprocessor/non-uniform memory access (NUMA) MP architectures and microarchitectures, system I/O buses, disk storage subsystems, and I/O controllers. Mr. Mullins joined IBM in 1977, and he holds an M.S.E.E. degree from the University of Minnesota as well as a B.S.E.E. degree from the University of California, Berkeley.

Brent A. Swartz IBM Systems and Technology Group, Development Laboratory, 3605 Highway 52 North, Rochester, Minnesota 55901 (swartzbrus.ibm.com). In May 1987, Mr. Swartz received a B.S. degree in computer science, physics, and mathematics from the University of Wisconsin–Eau Claire. He currently works on Blue Gene supercomputers at IBM in Rochester, Minnesota. His job responsibilities include performance testing for Blue Gene systems and applications porting and optimization. Since 1987, he has focused on the optimization of codes for high-performance computers. He previously worked on high-performance computing at NCube, Inc., the EPA National Environmental Supercomputer Center (NESC), the AFRL Maui High Performance Computing Center (MHPCC), and Cray, Inc.

Jeff S. McAllister IBM Systems and Technology Group, Development Laboratory, 3605 Highway 52 North, Rochester, Minnesota 55901 (jsmcallius.ibm.com). Mr. McAllister received an M.S. degree in computer science from the University of Alaska, Fairbanks in 1998. His thesis concerned the reengineering of scientific codes. Since then, he has assisted many scientific and business projects worldwide. He has worked as a liaison between supercomputer hardware administrators and users at the Arctic Region Supercomputing Center and as a coder, bringing mathematical ideas to peak performance implementations on clusters up to the largest machines available. He currently works for IBM in Rochester, Minnesota, facilitating the development of emerging high-performance applications on Blue Gene and Cell Broadband Engine systems.

Brian E. Smith IBM Systems and Technology Group, Development Laboratory, 3605 Highway 52 North, Rochester, Minnesota 55901 (smithbrus.ibm.com). Mr. Smith received an M.S. degree in computer engineering from Iowa State University in January 2005. He received B.S. degrees in both computer engineering and electrical engineering from Iowa State University in 2000. He currently works at IBM in Rochester, Minnesota, on the Blue Gene supercomputers. His job responsibilities include the communications stack for Blue Gene systems (both MPI and ARMCI/GA) and applications porting and optimizing. He previously worked on high-performance computing at the USDOE Ames Laboratory Research Laboratory.

Charles J. Archer IBM Systems and Technology Group, 3605 Highway 52 North, Rochester, Minnesota 55901 (archercus.ibm.com). Mr. Archer is a software engineer working on the Blue Gene and Road Runner projects. He received a B.S. degree in chemistry and a B.A. degree in mathematics from Minnesota State University at Moorhead, and an M.S. degree in chemistry from Columbia University. He is currently a graduate student in computer science at the University of Minnesota. Mr. Archer has worked on the OS/400* PASE project and grid computing, and was the message-passing team lead for the Blue Gene family of supercomputers. His current role is development, optimization, and maintenance of the Road Runner and Blue Gene message-passing software stack.

Roy G. Musselman IBM Systems and Technology Group, Development Laboratory, 3605 Highway 52 North, Rochester, Minnesota 55901 (musselus.ibm.com). Mr. Musselman works as the Blue Gene System Performance Team Leader at IBM in Rochester, Minnesota. He received a B.S. degree in electrical engineering from Iowa State University in 1980 and an M.S. degree from the University of Minnesota in 2005. He began his employment with IBM at Endicott, New York, in 1980, where he worked as a logic designer and product engineer for midrange computer systems. From 1985 to 2005, Mr. Musselman was integrally involved with the design and support of IBM internal use of hardware simulation accelerators and emulators. This included a 2-year temporary assignment with Supercomputer Systems, Inc., in Eau Clare, Wisconsin, before transferring to IBM in Rochester, Minnesota, in 1992. Mr. Musselman has authored several patents pertaining to hardware emulation and parallel communications.

Amanda E. Peters IBM Systems and Technology Group, Development Laboratory, 3605 Highway 52 North, Rochester, Minnesota 55901 (apetersus.ibm.com). Ms. Peters received a B.S. degree in both computer science and physics from Duke University in 2005. She currently works at IBM in Rochester, Minnesota, on the Blue Gene supercomputers. She is involved with the porting, validating, and optimizing of life science applications.

Brian P. Wallenfelt 14439 Fairway Drive, Eden Prairie, Minnesota 55344 (wallenfegmail.com). Mr. Wallenfelt received an M.S. degree in computer science from the University of Minnesota in March 2007. He received a B.S. degree in computer engineering from the University of Illinois at Urbana Champaign. He currently works for GeoDigm Corporation in Chanhassen, Minnesota. He previously worked on the Blue Gene system performance, applications, and kernel development teams at IBM in Rochester, Minnesota.

Kurt W. Pinnow 2415 Summit Drive NE, Rochester, Minnesota 55906 (kwparea51online.net). Mr. Pinnow received his B.S. degree in applied math and physics from the University of Wisconsin in January 1969. Mr. Pinnow is now retired from IBM after having worked more than 38 years in the computer performance area. More than 35 of these years were spent working for IBM, where Mr. Pinnow's work has primarily focused on software performance. His first performance work with IBM concerned the parallel computer system software used in conjunction with the anti-ballistic missile system to track and plan attacks against incoming missiles in a real-time parallel computing environment. More recently Mr. Pinnow's contributions concerned the iSeries* components involved with the system file server, the SQL database engine and optimizer, and TCP/IP communications. For the last 3 years prior to his retirement in 2006, Mr. Pinnow worked on the Blue Gene/L system when he and his team successfully ensured the performance of Blue Gene. In his Blue Gene/L system work, the span of his efforts encompassed hardware, operating system software, and performance-oriented application programming.

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**Trademark, service mark, or registered trademark of the Mayo Foundation for Medical Education and Research, Intel Corporation, Advanced Micro Devices, Inc., Myricom, Inc., Quadrics Ltd., the InfiniBand Trade Association, TOP500.Org, Linus Torvalds, or Sony Computer Entertainment, Inc., in the United States, other countries, or both.