Affiliation: | aDepartment of Mechanical Engineering, Boston University, MA 02215, United States;bDepartment of Electrical and Electronic Engineering, Imperial College London, UK;cDipartimento di Informatica, Sistemi e Produzione, Università di Roma Tor Vergata, Via del Politecnico 1, 00133 Roma, Italy;dASRI, Department of Electrical Engineering, Seoul National University, Seoul, Republic of Korea |