1. Dept. of Mechanical Engineering, Yildiz Technical Univ., Istanbul, 34349 TR, e-mail: ozgen@yildiz.edu.tr
2. Dept. of Mechanical Engineering, Yildiz Technical Univ., Istanbul, 34349 TR, e-mail: alpacar@yildiz.edu.tr
3. Dept. of Mechanical Engineering, Yildiz Technical Univ., Istanbul, 34349 TR, e-mail: emreergenekon@hotmail.com