**Author details**

Petrica Vizureanu\*, Dumitru Doru Burduhos Nergis, Andrei Victor Sandu, Diana Petronela Burduhos Nergis and Madalina Simona Baltatu "Gheorghe Asachi" Technical University of Iasi, Iasi, Romania

\*Address all correspondence to: peviz2002@yahoo.com

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
