Title	Output Feedback Synchronization of A Novel Chaotic System And Its Application in Secure Communication
Author	Arian Azarang, Javad Ranjbar, Hamid Mohseni, Mohammad Ahi Andy
Citation	Vol. 17  No. 4  pp. 72-77
Keywords	Chaotic signals Output feedback controller Chaos masking Analog implementation.

Title	Security Issues and Solutions related to Data Aggregation Process in WSN
Author	Cherif Diallo
Citation	Vol. 17  No. 4  pp. 59-71
Keywords	Wireless Sensor Networks, Data Aggregation, Security, Cryptography.

Title	Power Systems Optimal Placement And Sizing Of STATCOM in Multi-Objective Optimization Approach And Using NSGA-II Algorithm
Author	Roozbeh Mohammadi , MEHDI MAHDAVIAN
Citation	Vol. 17  No. 4  pp. 51-58
Keywords	STATCOM, NSGA-II Algorithm, multi-objective optimization approach

Title	Designing Recreational Center Using Urban Open Spaces in Qom
Author	Atiyeh abdolghaffari, morteza seddigh
Citation	Vol. 17  No. 4  pp. 44-50
Keywords	leisure, recreation, urban public sphere, urban open space, urban green space, social interactions