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Submitted on: 03 September 1999.
Revised on: 06 November 1999.
Accepted on: 01 January 2000.
___________________Journal of Applied Science and Engineering
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Submitted on: 13 January 2005.
Revised on: 06 March 2005.
Accepted on: 25 April 2005.
___________________Journal of Applied Science and Engineering
Submitted on: 08 July 2002.
Revised on: 15 October 2002.
Accepted on: 18 November 2002.
___________________Journal of Applied Science and Engineering
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Submitted on: 21 February 2005.
Revised on: 27 April 2005.
Accepted on: 07 June 2005.
___________________Journal of Applied Science and Engineering
Submitted on: 21 February 2001.
Revised on: 06 April 2001.
Accepted on: 29 April 2001.
___________________Journal of Applied Science and Engineering