Wen-Jong Wu is currently Professor with Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei, Taiwan. Wen-Jong Wu got his Ph.D degree in Institute of Applied Mechanics from National Taiwan University. He joined Department of Engineering Science and Ocean Engineering, National Taiwan University as Assistant Professor since 2003, has been Associate Professor since 2010, and has been Professor since 2014. He has been inviting Professors in ENS de Cachan and INSA de Lyon in 2015 and 2018, respectively. He is currently associate editor of Smart Materials and Structures. His research interests are in piezoelectric power transducer, small-scale piezoelectric energy harvesting, and ultrasonic/acoustic transducers.