Allan G PiersolAllan G. Piersol was an engineer in private practice, specializing in analysis of data from, and the design of structures for shock, vibration, and acoustical environments. He was a licensed engineer in both mechanical and safety engneering. The author of five books and chapter author of five additional handbooks dealing with these subjects, Mr. Piersol also taught graduate courses in mechanical shock and vibration at Loyola Marymount University in Los Angeles, California.

Thomas L. Paez, recently a distinguished member of the technical staff at Sandia National Laboratories, works as a consultant specializing in probabilistic structural dynamics and validation of mathematical models. He is the author of a text on random vibrations and many chapters and papers dealing with random vibrations, mechanical shock, and model validation. Mr. Paez frequently teaches short courses on random vibrations and mechanical shock.

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