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Submitted on: 10 July 2010.
Revised on: 27 August 2010.
Accepted on: 27 September 2010.
___________________Journal of Electrical Engineering & Technology
Submitted on: 04 July 2012.
Revised on: 12 October 2012.
Accepted on: 07 December 2012.
___________________Journal of Electrical Engineering & Technology
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Submitted on: 08 October 2005.
Revised on: 12 December 2005.
Accepted on: 28 January 2006.
___________________Journal of Electrical Engineering & Technology
Submitted on: 01 August 2003.
Revised on: 31 October 2003.
Accepted on: 11 December 2003.
___________________Journal of Electrical Engineering & Technology
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