Dr. Ralph Metcalfe, Ph.D. served as research scientist at Flow Research Company in Seattle, Washington for 12 years. In 1987, Dr. Metcalfe joined the faculty at the University of Houston where he is professor of Mechanical Engineering , Biomedical Engineering and Mathematics. Recently, his work has focused on numerical simulations of blood flow in normal and diseased carotid arteries to investigate the role of fluid dynamic parameters such as wall shear stress and vortex generation on the formation of atherosclerotic lesions. In conjunction with surgeons at the Texas Heart Institute, Dr. Metcalfe has also investigated numerically the fluid dynamical consequences of implantation of a new type of Ventricular Assist Device. Dr. Metcalfe was a Senior Research Scientist at Flow Industries He serves as Scientific Advisor of Fairway Medical Technologies, Inc. Dr. Metcalfe serves as Member of Scientific Advisory Board at Endothelix, Inc. Dr. Metcalfe was appointed Chair of the National Institutes of Health Cardiovascular Devices Study Section. Dr. Metcalfe received his B.S. in Mathematics from the University of Washington, his M. S. in mathematics from M. I. T. and his PhD in applied mathematics from Massachusetts Institute of Technology (M. I. T.) with Professor Steven Orszag.