Submitted on: 28 January 2007.
Revised on: 08 March 2007.
Accepted on: 22 April 2007.
___________________International Journal of Automation and Computing
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Submitted on: 01 August 2020.
Revised on: 30 October 2020.
Accepted on: 27 December 2020.
___________________International Journal of Automation and Computing
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Submitted on: 19 July 1999.
Revised on: 12 September 1999.
Accepted on: 16 October 1999.
___________________International Journal of Automation and Computing