Submitted on: 08 September 2011.
Revised on: 30 November 2011.
Accepted on: 16 December 2011.
___________________ACM Transactions on Applied Perception
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Submitted on: 19 March 2005.
Revised on: 23 June 2005.
Accepted on: 16 August 2005.
___________________ACM Transactions on Applied Perception
Submitted on: 23 March 2002.
Revised on: 14 May 2002.
Accepted on: 24 June 2002.
___________________ACM Transactions on Applied Perception
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