Salah Haggag1, Moutaz Ramadan2

1 The Egyptian Russian University (Cairo 11829, Arab Republic of Egypt)
2 Port Said University (Port Said, Arab Republic of Egypt)
1 salah-haggag@eru.edu.eg

K.A. Bolshakova1, S.V. Chervon2

1, 2 Ulyanovsk State Pedagogical University (Ulyanovsk, Russia)
2 Bauman Moscow State Technical University (Moscow, Russia)
2 Kazan Federal University (Kazan, Russia)
1 bolshakova.ktrn@gmail.com, 2 chervon.sergey@gmail.com