Anthony Bedford is Professor Emeritus, Department of Aerospace Engineering and Engineering Mechanics, University of Texas at Austin. He has been on the faculty since 1968. He has industrial and consulting experience at Douglas Missiles and Space Systems Division, Sandia National Laboratories, and at TRW, where he worked on the Apollo program. His main professional activity has been education and research in engineering mechanics. His books include Hamilton’s Principle in Continuum Mechanics, Engineering Mechanics: Statics and Dynamics (with Wallace T. Fowler), and Mechanics of Materials (with Kenneth M. Liechti).Douglas S. Drumheller is a Distinguish Member of the Technical Staff (retired) of Sandia National Laboratories. He moved from Bell Telephone Laboratories to Sandia National Laboratories 1969, where he pursued extensive research into the behavior of shock waves in solids. He also has extensive consulting experience with the oil industry having developed the fundamental technology for the acoustic telemetry system, a commercial measurement-while-drilling technique. He holds 18 U.S. Patents in this area. His books include Introduction to Wave Propagation in Nonlinear Fluids and Solids.
