Title	Major Milestones of Modern Payment Systems
Author	B. Tirimula Rao, M. Dileep, E. Vedavalli, K. Aditya, S. Bindu
Citation	Vol. 9  No. 9  pp. 123-133
Keywords	Payment system, Financial Institutions, E-commerce, Electronic Payment

Title	Experimental Result of Particle Collision Algorithm for Solving Course Timetabling Problems
Author	Anmar Abuhamdah, Masri Ayob
Citation	Vol. 9  No. 9  pp. 134-142
Keywords	Course Timetabling Problem, Meta-Heuristics, Particle Collision Algorithm, Simulated Annealing, Great Deluge

Title	Query Processing and Optimization in Distributed Database Systems
Author	B.M. Monjurul Alom, Frans Henskens, Michael Hannaford
Citation	Vol. 9  No. 9  pp. 143-152
Keywords	Join, Semijoin, Query, FRS, PRS, LR, and Optimization

Title	Performance Analysis of Improved Cache Invalidation Scheme in Mobile Computing Environment
Author	Miraclin Joyce Pamila J.C., Thanushkodi K
Citation	Vol. 9  No. 9  pp. 153-160
Keywords	Cache invalidation, Transaction processing in mobile networks, Consistency preservation, concurrency control