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Submitted on: 05 January 2011.
Revised on: 10 February 2011.
Accepted on: 06 April 2011.
___________________International Journal on Smart Sensing and Intelligent Systems
Submitted on: 06 January 2010.
Revised on: 10 February 2010.
Accepted on: 02 April 2010.
___________________International Journal on Smart Sensing and Intelligent Systems
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