Dr Eleni Apostolidou, Professor, International Hellenic University - Kavala Campus.

Dr Nikolaos C. Kokkinos, Assoc. Professor, International Hellenic University - Kavala Campus.

Dr Dhaker Abbes, Chercheur HDR, Ecole des Hautes Etudes d' Ingénieur (HEI).

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