1. School of Computer Studies; Department of Computer Science and Engineering; National Institute of Science and Technology (NIST); Berhampur 761008; Orissa; India
2. Hi-Tech Consultants; STEP Indian Institute of Technology; Kharagpur 21302; West Bengal; India
3. School of Computer Science and Engineering; University of New South Wales; Sydney 2052; Australia
4. Department of Electronics and Computer Engineering; Ngee Ann Polytechnic Singapore Institute of Management; Singapore 599489