Title	Abnormal Crowd Behavior Detection Using Heuristic Search and Motion Awareness
Author	Imran Usman and Abdulaziz A. Albesher
Citation	Vol. 21  No. 4  pp. 131-139
Keywords	abnormal behavior detection, genetic programming, crowd analysis, motion pattern, anomaly

Title	New Detection Cheating Method of Online-Exams during COVID-19 Pandemic
Author	Amr Jadi
Citation	Vol. 21  No. 4  pp. 123-130
Keywords	E-exam, CNN, Proctoring, Cheating, Covid-19

Title	The Blockchain-Based Decentralized Approaches for Cloud Computing to offer enhanced Quality of Service in terms of Privacy Preservation and Security: A review.
Author	Arun Kumar B.R and Komala R
Citation	Vol. 21  No. 4  pp. 115-122
Keywords	Block-chain technology, cloud computing, decentralized, privacy, security, transparency, trust model, quality of service.

Title	Model Multiplicity (UML) Versus Model Singularity in System Requirements and Design
Author	Sabah Al-Fedaghi
Citation	Vol. 21  No. 4  pp. 103-114
Keywords	Requirements elicitation; conceptual modeling; model multiplicity; model singularity; static model; dynamic model; behavioral model