Richard BudynasRichard G. Budynas (deceased) was Professor Emeritus of the Kate Gleason College of Engineering at Rochester Institute of Technology. He had over 45 years of experience in both teaching and practicing mechanical engineering design and was the o-author of Shigley's Mechanical Engineering Design, 11th Edition.

Ali Sadegh is Professor, the founder and director of the Center for Advanced Engineering Design, and was the Chairman of the Department of Mechanical Engineering at CCNY/CUNY. He is a PE and CMfgE with over 35 years experience in academia and practicing mechanical engineering design He led the development of the 11th and 12th editions of Mark's Standard Handbook for Mechanical Engineers.

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