1. Thermodynamics and Optimization Group, Instituto Politécnico, Universidade do Estado do Rio de Janeiro, 28601-970, Nova Friburgo-RJ, Brazil, Universidade Federal do Oeste Pará, 68040-070, Santarém-PA, Brazil, and School of Computational and Applied Mathematics, Witwatersrand University, Private-Bag-3, Johannesburg, South Africa