Submitted on: 07 April 2008.
Revised on: 05 July 2008.
Accepted on: 24 July 2008.
___________________IEEE INDUSTRY APPLICATIONS MAGAZINE
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Submitted on: 12 July 2008.
Revised on: 30 October 2008.
Accepted on: 16 November 2008.
___________________IEEE INDUSTRY APPLICATIONS MAGAZINE
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Submitted on: 17 September 2005.
Revised on: 31 October 2005.
Accepted on: 19 November 2005.
___________________IEEE INDUSTRY APPLICATIONS MAGAZINE
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