1. Department of Computing, Electronics and Communication Technologies, Faculty of Engineering, University of Deusto, Bilbao, Spain
2. Colegio de Ciencias e IngenierÍas ‘‘El Politécnico’’, Universidad San Francisco de Quito (USFQ), Quito, Ecuador
3. Department of Mechanics, Design and Industrial Management, Faculty of Engineering, University of Deusto, Bilbao, Spain