Submitted on: 21 July 2012.
Revised on: 04 November 2012.
Accepted on: 27 November 2012.
___________________Jordanian Journal of Computers and Information Technology
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Submitted on: 20 June 2011.
Revised on: 23 July 2011.
Accepted on: 20 September 2011.
___________________Jordanian Journal of Computers and Information Technology
Submitted on: 25 September 2013.
Revised on: 20 November 2013.
Accepted on: 09 January 2014.
___________________Jordanian Journal of Computers and Information Technology
Submitted on: 11 July 2003.
Revised on: 13 October 2003.
Accepted on: 18 November 2003.
___________________Jordanian Journal of Computers and Information Technology
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Submitted on: 31 March 2009.
Revised on: 21 May 2009.
Accepted on: 15 July 2009.
___________________Jordanian Journal of Computers and Information Technology