An invited lecture, “Semiotic Behavioral Modeling of Humans and Humanoid Robots,” at Department of Mechanical Engineering, National Taiwan University hosted by Prof. Shuo Hung Chung. Approximately 150 ME students attended on Feb 22, 2010, the very first day after the New Year’s vacation. Smart and enthusiastic students asked a few questions after the talk and many questions by an e-mail. Thanks for the warm hospitality of Prof. Chung and his students. Photo: a mass for active vibration control of the previous world-No1 skyscraper “101” in Taipei.