1. Department of Informatics; University of Assane Seck; Ziguinchor Senegal
2. Université du Québec en Abitibi-Témiscamingue Rouyn-Noranda; Quebec Canada
3. Clermont Université/LIMOS CNRS - Complexe scientifique des Cézeaux; Aubiere France
4. Federal University of Piauí; Teresina PI Brazil
5. Instituto de Telecomunicações; Portugal