Dr Eleni Apostolidou, Professor, Eastern Macedonia and Thrace Institute of Technology.

Dr Nikolaos C. Kokkinos, Assoc. Professor, Eastern Macedonia and Thrace Institute of Technology.

Dr Abdel Aitouche, Professor, Ecole des Hautes Etudes d' Ingénieur (HEI).

Dr Malek Benmansour, Head of the Material Laboratory, National Institute of Solar Energy (INES).