Pedro Encarnacao is an Adjunct Professor at the Catolica Lisbon School of Business and Economics of the Catholic University of Portugal. He is an active researcher in robotic systems for rehabiliation. Albert Cook is an Emeritus Professor at the University of Alberta and California State University, Sacramento. He is the co-author of "Assistive Technologies: Principles and Practices, 4/e" and "Essentials of Assistive Technologies". He has co-edited three other multi-authored texts with John Webster and written numerous chapters on rehabilitaiton and biomedical engineering in a large number of journals and proceedings. He is the Past-President and fellow of RESNA.