The late Andrew D. Dimarogonas, widely recognized as a distinguished authority in various specialties of mechanical engineering-especially mechanical design and vibrations- was the W. Palm Professor of Mechanical Design and the Director of the Manufaturing Program in the School of Engineering and Applied Science at Washington University, St. Louis. In a career that included expereince in both academic and corporate environments, he was the recipient of numerous patents and the author of more than thirteen books.