TY CONF TI Theoretical Approaches to the Study of the Self-Attitude of University Students KW self-attitude KW self-awareness KW students KW self-respect KW autosympathy KW self-interest JO VII Betancourt International Engineering Forum AU Kaznacheeva, N.B. AU Denisova, A.V. PY 2026 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"