Acknowledgements

From the inner depths of my heart I give all glory and praises to the Almighty for this work has been accomplished due to his everlasting mercy and abundant compassion.

This effort of ours would not have been a success but for the contributions made by a lot of people. First and foremost I take this opportunity to express my deep gratitude to JNTU Anantapur, Kakinada and JNTUACEP for accepting this book as a reference textbook. I express my heartfelt thanks to the editorial and production team of Pearson Education, especially Mr Sojan Jose, Ms R. Dheepika and Mr M. Balakrishnan, whose immense contribution has shaped this stupendous work. I am also grateful to sales manager Mr M. Srinadh for taking keen interest in bringing out this book.

It is a great pleasure to express my heartfelt thanks to all my teachers for tuning my life in a fruitful way. I wish to express my sincere thanks to my family members. I owe much to my parents Sri Kalluru Naga Malla Reddy and Smt. Gangulamma, my brothers Mallikarjuna Reddy and Nagarjuna Reddy for their cherished, unstinted love and encouragement in all my good activities. I wish to express my indebted thanks to my husband Dr C. Mallikarjuna Reddy for his unbounding affection and source of constant inspiration throughout my work. I am grateful to my sister-in-law Smt. T. Chandra Leelavathi and my brother Sri T. Raja Sekhara Reddy, for their perpetual dedication to carry out my family commitments with all their moral and physical support while I struggle with my work. My hearty cheers to my beloved children C. Hitesh Reddy and C. Hasya Reddy, whose love and smile encouraged me in completing this work. I am thankful to my colleagues, friends and those students who helped me a lot.

K. Sesha Maheswaramma

I express my thanks to all of my family members. First and foremost, I would like to thank my husband Gaurav Chugh for standing by me throughout my career and supporting me in writing this book. He is a continuous source of inspiration. I would like to thank my parents and my siblings for allowing me to follow my ambitions throughout my childhood. My family, including my in-laws, has always supported me throughout my career and authoring this book and I really appreciate it. I would also like to thank Dr Y. Madhveelatha, Principal, MRECW for her encouragement and Dr Pawan Sharma for suggestions and guidance. I also owe my thanks to my well-wishers Dr Nidhi Dureja, Dr Gaurav Dhingra, Dr Saritha and Ms Tanuja Safala and Ms Harshitha.

Mridula Chugh