V.M. Artyushenko1, V.I. Volovach2

1 Technological University named after twice Hero of the Soviet Union Cosmonaut A.A. Leonov (Korolev, Russia)

2 Volga Region State University of Service (Tolyatti, Russia); Voronezh State University (Voronezh, Russia)

1 artuschenko@mail.ru; 2 volovach.vi@mail.ru