**About the Editors**

**Antonio Colmenar Santos** has been a senior lecturer in the field of Electrical Engineering at the Department of Electrical, Electronic and Control Engineering at the National Distance Education University (UNED) since June 2014. Dr. Colmenar-Santos was an adjunct lecturer at both the Department of Electronic Technology at the University of Alcala and at the Department of ´ Electric, Electronic and Control Engineering at UNED. He has also worked as a consultant for the INTECNA project (Nicaragua). He has been part of the Spanish section of the International Solar Energy Society (ISES) and of the Association for the Advancement of Computing in Education (AACE), working in a number of projects related to renewable energies and multimedia systems applied to teaching. He was the coordinator of both the virtualisation and telematic Services at ETSII-UNED, and deputy head teacher and the head of the Department of Electrical, Electronics and Control Engineering at UNED. He is the author of more than 60 papers published in respected journals (http://goo.gl/YqvYLk) and has participated in more than 100 national and international conferences.

**David Borge Diez** has a Ph.D. in Industrial Engineering and an M.Sc. in Industrial Engineering, both from the School of Industrial Engineering at the National Distance Education University (UNED). He is currently a lecturer and researcher at the Department of Electrical, Systems and Control Engineering at the University of Leon, Spain. He has been involved in many national and ´ international research projects investigating energy efficiency and renewable energies. He has also worked in Spanish and international engineering companies in the field of energy efficiency and renewable energy for over eight years. He has authored more than 40 publications in international peer-reviewed research journals and participated in numerous international conferences.

**Enrique Rosales Asensio** is an industrial engineer with postgraduate degrees in electrical engineering, business administration, and quality, health, safety and environment managemen<sup>t</sup> systems. He has been a lecturer at the Department of Electrical, Systems and Control Engineering at the University of Leon, and a senior researcher at the University of La Laguna, where he has been ´ involved in water desalination project in which the resulting surplus electricity and water would be sold. He has also worked as a plant engineer for a company that focuses on the design, development and manufacture of waste-heat recovery technology for large reciprocating engines, and as a project manager in a world-leading research centre. Currently, he is an associate professor at the Department of Electrical Engineering at the University of Las Palmas de Gran Canaria.
