Affiliation: | 1.Local Materials Promotion Authority, MINRESI/MIPROMALO, P.O. Box 2396, Yaoundé, Cameroon ;2.National Advanced School of Engineering, University of Yaoundé I, P.O box 8390, Yaoundé, Cameroon ;3.Department of Engineering Enzo Ferrari, The University of Modena and Reggio Emilia, Via P. Vivarelli 10, 41125, Modena, Italy ;4.Univ. Limoges, IRCER, UMR 7315, 87000, Limoges, France ; |