Patrick F. Dunn, Ph.D., P.E., is a professor of aerospace and mechanical engineering at the University of Notre Dame, where he has been a faculty member since 1985. Prior to 1985, he was a mechanical engineer at Argonne National Laboratory from 1976 to 1985 and a postdoctoral fellow at Duke University from 1974 to 1976. He received his B.S., M.S. and Ph.D. degrees in engineering from Purdue University (1970, 1971 and 1974). He is the author of over 160 scientific journal and refereed symposia publications and a licensed Professional Engineer in Indiana and Illinois. He is a Fellow of the American Society of Mechanical Engineers, and an Associate Fellow of the American Institute of Aeronautics and Astronautics. He is the recipient of departmental, college and university teaching awards. Professor Dunn's scientific expertise is in fluid mechanics and microparticle behavior in flows. He is an experimentalist with over 40 years of experience involving measurement uncertainty.