Title	Simulation Study for a UV Water Disinfection Unit Powered by a Photovoltaic System
Author	Sa?d Riahi, Abdelkader Mami, and Viorel M?nzu
Citation	Vol. 22  No. 1  pp. 175-182
Keywords	dynamic model, converters, photovoltaic system, simulation, UV disinfection system.

Title	Hepatitis C Stage Classification with hybridization of GA and Chi2 Feature Selection
Author	Rukayya Umar, Steve Adeshina, Moussa Mahamat Boukar
Citation	Vol. 22  No. 1  pp. 167-174
Keywords	Hepatitis; Hepatitis prediction; Feature selection;

Title	Intensification Of Cognitive Activity Of Higher Education Seekers As A Central Problem Of Modern Didactics
Author	Aryna Kharkivska, Valentyna Honcharuk, Valentyna Tyurina, Svitlana Yuldasheva, Liudmyla Koval, Olha Poliakova
Citation	Vol. 22  No. 1  pp. 161-166
Keywords	psychophysiological and socio-psychological spheres, individual, education system, educational process.

Title	Marketing Strategy of the Small Business Adaptation to Quarantine Limitations in the Sphere of Trade Entrepreneurship
Author	Nataliia Ivanova, Olha Popelo, Ruslan Avhustyn, Olena Rusak, Alina Proshchalykina
Citation	Vol. 22  No. 1  pp. 149-160
Keywords	marketing strategy, digitalization, digital consumer behavior, trade entrepreneurship, retail, quarantine restrictions, covid-19, vending.