List of Articles Simulation Open Access Article Abstract Page Full-Text 1 - A New Design for Two-input XOR Gate in Quantum-dot Cellular Automata Hossein Khademolhosseini Yaser Nemati Open Access Article Abstract Page Full-Text 2 - Presenting a Hybrid Method to Increase Lifetime of Wireless Sensor Networks Using Effective Determination of Operating Mode of Sensors in Regional Coverage Javad Aramideh Homayun Motameni Open Access Article Abstract Page Full-Text 3 - A Utility-Based Data Replication Algorithm in Large Scale Data Grids Najme Mansouri Open Access Article Abstract Page Full-Text 4 - MAC Protocols in Underwater Wireless Sensor Networks: Issues and Simulations Reza Mohammadi Seyyed Yahya Nabavi Reza Javidan