1. Department
of Control Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, Prague 6, Czech Republic
2. Laboratório
de Ensaios, Desgaste e Materiais, Instituto Pedro Nunes, Rua Pedro Nunes, 3030-199 Coimbra, Portugal
3. Mechanical
Engineering Department, SEG-CEMUC, University of Coimbra, 3030-788 Coimbra, Portugal
4. Department
of Engineering Sciences, Solid-State Electronics, Uppsala University, P.O. Box 534, Uppsala SE-751 21, Sweden
5. National
Centre
for Advanced Tribology at Southampton (nCATS), University of Southampton, Highfield SO17 1BJ Southampton, United Kingdom
6. Department
of Physics and Materials Science and Centre for Functional Photonics
(CFP), City University of Hong Kong, Hong Kong S.A.R