S. Thamizhmanii*, B. Saparudin, S. Hasan
Faculty of Mechanical and Manufacturing Engineering,
University of Tun Hussein Onn Malaysia (UTHM), 86400,
Parit Raja, Batu Pahat, Johor, Malaysia
* Corresponding author: E-mail address: thamizhmaniis@yahoo.com
Received 16.03.2007; published in revised form 01.06.2007