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Submitted on: 05 January 2013.
Revised on: 29 March 2013.
Accepted on: 20 May 2013.
___________________INFRARED PHYSICS & TECHNOLOGY---ELSEVIER
Submitted on: 22 October 2004.
Revised on: 01 December 2004.
Accepted on: 27 January 2005.
___________________INFRARED PHYSICS & TECHNOLOGY---ELSEVIER
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