S.M. Chang was born in Taichung, Taiwan in 1966. He received the M.Sc. and PH.D. degrees from National Cheng Kung University, in 1990 and 1995, respectively. He was Manager of Hot Strip Mill in YL Group Steel Making Company. In 2000, he joined the School of Automation and Mechanical Engineering at Kao Yuan University at Kaohsiung, in Taiwan, as a Assistant Professor. He was member of Taiwan Mechanical Professional Engineer Association since 2000. And he was patent attorney since 2008. He is editor in chief of Journal of Professional Mechanical Engineers since 2008. He got more than 50 patents. In Taiwan and won 2010 national invention sliver award. He has published over 20 refereed journal and conference papers in the areas of comfort of specified space with mean square root of field synergy angle. His representative published articles lists as follow: Integrated Assessment for Trapezoid and Square Types PEMFC Bipolar Plate by Field Synergy Principle (J. Pro. Mech. Eng, 2010), Truck Comfort of Air Condition by Field Synergy Principle (2010 International Conference on Logistics Engineering and Intelligent Transportation Systems, 2010), The Submarine Air Condition Optimization by Field Synergy Principle(J. Pro. Mech. Eng , 2010), etc. Moreover, he was a participant of some engineering projects such as slab torching cutting simulation for Chinese Steel Company. His activities currently focus on PEMFC bipolar plate filling of mold injection by field synergy principle. His research interests include inverse problem, and thermo-elasticity theory.