1. VARIATION OF PARAMETERS METHOD FOR THREE-DIMENSIONAL PROBLEM OF CONDENSATION FILM ON INCLINED ROTATING DISK
Osman Güngör, Cihat Arslantürk

2. Searching the beginning of the climb to get the most reliable difficulty index
Michał Wróbel

3. Calculating steady-state probabilities of queueing systems using hyperexponential approximation
Yuriy Zhernovyi, Bohdan Kopytko

4. Strength analysis of a telescopic hydraulic cylinder elastically mounted on both ends
Sebastian Uzny, Łukasz Kutrowski

5. NUMERICAL ANALYSIS OF FREQUENCIES AND FORMS OF OWN COLLARS OF DIFFERENT FORMS WITH FREE ZONE
Maksym Borysenko, Andrii Zavhorodnii, Ruslan Skupskyi