Roland Kallenborn: I dedicate this work to
my family (Mia, Magnus and Berit). Without
their continuous and enthusiastic support, this
tremendous work would not have been
possible.
Heinrich Hühnerfuss: Without the extreme
patience and continuous support of my wife
Erika, my contribution to this book would not
have been accomplished. This is gratefully
acknowledged.
Hassan Y. Aboul Enein: This book is
dedicated to my beloved wife Nagla for her
unlimited support and encouragement.
Imran Ali: This book is dedicated to the
memories of my late parents: Basheer Ahmed
and Mehmudan Begum.