Title	Optimization of the Educational Environment Using Information Technologies
Author	Faisal Mohammed Nafie and Abdelmoneim Ali Mohamed Hamed
Citation	Vol. 21  No. 4  pp. 306-312
Keywords	Academic performance; Data Mining; Higher education; Academic advising; Decision-making.

Title	Standards In The Psychological Structure Of The Personality Of Students
Author	Anna Liakisheva, Ihor Salamakha, Liudmyla Malimon, Nataliia Khanykina, Maryna Fedorenko, Yuliia Makieshyna
Citation	Vol. 21  No. 4  pp. 301-305
Keywords	Higher Education, Regulators, Experiment, information technology.

Title	A Survey of Public-key Cryptography over Non-abelian Groups
Author	G. H. J. Lanel, T. M. K. K. Jinasena and B. A. K. Welihinda
Citation	Vol. 21  No. 4  pp. 289-300
Keywords	Cryptography, Diffie-Hellman, Discrete Logarithm Problem, El-Gamal, Hamiltonian Cycle/Path Problem, Non-abelian/Non-commutative.

Title	Smart Deaf Emergency Application Based on Human-Computer Interaction Principles
Author	Thowiba E Ahmed, Naba Abdulraouf Almadan, Alma Nabil Elsad다, Haya Zayed Albishi, Norah Eid Al-Qahtani, Sarah Khaled Alghamdi
Citation	Vol. 21  No. 4  pp. 284-288
Keywords	Smart Deaf Emergency, Human-Computer Interaction, TTY, Impaired hearing.