Dr. Yeh received Sc.D. degrees in mechanical engineering from Massachusetts Institute of Technology in 1992 and 1996. From 1996 to 1997, he was employed by JLG industries, USA, as an advanced technology specialist. He is currently a professor in the department of Power Mechanical Engineering at National Tsing Hua University. His research interests include modeling and control of dynamic systems, nonlinear control theories, and robotic applications.