Jung-Chou Hung is an associate professor in the Department of Mechanical Engineering at National Central University, Taoyuan, Taiwan. He received a PhD from the Department of Mechanical Engineering at National Central University in 2007. His research interests include precision electrochemical machining (ECM), polishing, deburring, precision electrical discharge machining (EDM), ultrasonic machining (USM), micromachining, and metal surface treatment.