Affiliation: | 1.Centro Tecnológico, Federal University of Santa Maria (UFSM), Santa Maria, Brazil ;2.Coordenadoria Acadêmica, Federal University of Santa Maria (UFSM), Cachoeira do Sul, Brazil ;3.Escola Politécnica, Centro Interdisciplinar de Energia e Ambiente (CIENAM), Federal University of Bahia (UFBA), Salvador, Brazil ; |