The Journal of Engineering and Exact Sciences; Vol. 2 No. 4 (2016); 031-033 The Journal of Engineering and Exact Sciences; Vol. 2 Núm. 4 (2016); 031-033 The Journal of Engineering and Exact Sciences; v. 2 n. 4 (2016); 031-033 The Journal of Engineering and Exact Sciences Universidade Federal de Viçosa (UFV) instacron:UFV The Journal of Engineering and Exact Sciences, Vol 2, Iss 4, Pp 031-033 (2016)