Information and communication technologies in education, research, and industrial applications 15th International Conference, ICTERI 2019, Kherson, Ukraine, June 12-15, 2019 : revised selected papers - Ermolayev, Vadim 1962-; Mallet, Frédéric; Yakovyna, Vitaliy; Mayr, Heinrich Christian 1948-; Spivakovsky, Aleksander (Springer, 2020)