A. A. Smirnov – Dr.Sc. (Eng.), Associate Professor, Professor,

North-Caucasus Federal University (Stavropol)

E-mail: shursun@mail.ru

M. A. Solchatov – Ph.D. (Eng.), Associate Professor,

North-Caucasus Federal University (Stavropol)

V. V. Bondar – Ph.D. (Phys.-Math.), Associate Professor, Head of Department,

North-Caucasus Federal University (Stavropol)

O. D. Rozhenko – Ph.D. (Ped.), Associate Professor,

North-Caucasus Federal University (Stavropol)

A. D. Darjania – Ph.D. (Ped.), Associate Professor,

North-Caucasus Federal University (Stavropol)

L. V. Belokon – Ph.D. (Eng.), Associate Professor,

North-Caucasus Federal University (Stavropol)