Title	Monitoring People’s Emotions and Symptoms after COVID-19 vaccine
Author	Najwa N. Alshahrani, Sara N. Abduljaleel, Ghidaa A. Alnefaiy, and Hanan S. Alshanbari
Citation	Vol. 23  No. 6  pp. 202-206
Keywords	COVID-19; Vaccine; Sentiment analysis; social media; Twitter; Tweets

Title	The Maximum Scatter Travelling Salesman Problem: A Hybrid Genetic Algorithm
Author	Zakir Hussain Ahmed, Asaad Shakir Hameed, Modhi Lafta Mutar, Mohammed F. Alrifaie, Mundher Mohammed Taresh
Citation	Vol. 23  No. 6  pp. 193-201
Keywords	Hybrid genetic algorithm; maximum scatter traveling salesman problem; sequential constructive crossover; adaptive mutation; local search; perturbation procedure.

Title	Performance Analysis of Blockchain Consensus Protocols- A Review
Author	Amina Yaqoob, Alma Shamas, Jawad Ibrahim
Citation	Vol. 23  No. 6  pp. 181-192
Keywords	Blockchain, Consensus Protocols, Security, Performance Measures

Title	The Mediating Role of Network Service for Customer Satisfaction during COVID-19 Online Classes: Evidence from University Students
Author	Naveed Akhtar Qureshi and Raheela Haque
Citation	Vol. 23  No. 6  pp. 176-180
Keywords	.Perceived quality, Retailer service, Network service, Customer satisfaction during COVID-19.