
Acknowledgements
I would like to thank all those who have encouraged me to write technical books, especially Prof. B. M. Naik,
former Principal of S.G.G.S. College of Engineering and Technology, Nanded, who has been a driving force
for the publication of books and who acted as a source of inspiration throughout my life. His dynamism and
leadership led me to write this book. I will never forget his instinct, support, and words of wisdom.
Special thanks are due to the members of the Board of Governors of S.G.G.S. Institute of Engineer-
ing and Technology, who motivated me to write this book. They are Shri Baba Kalyani, Chairman and
Managing Director ...