1. Electrical Engineering Unit, Tampere University, Tampere, Finland
2. Institut für Sozialforschung und Sozialwirtschaft (iso) e.V., Saarbrücken, Germany
3. Laboratory of Applied Hydrology and Environment, University of Lome, Lome, Togo
4. Centrul IT Pentru Stiinta si Tehnologie, Bucharest, Romania
5. Unite de Developpement des Equipements Solaires, UDES/EPST–Centre de Developpement des Energies Renouvelables, Tipaza, Algeria
6. Research Center Scientific and Technical in Analyzes Physics (CRAPC), Tipaza, Algeria