Ming-Kun Chang
Department of Mechanical and Computer-Aided Engineering, St. John’s University, No. 499, Section 4, Tam King Road, Tamsui District, New Taipei City 25135, Taiwan
Received 14 November 2013; Accepted 22 December 2013; Published 18 March 2014
Academic Editors: N.-I. Kim and K. I. Ramachandran
Copyright © 2014 Ming-Kun Chang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.