The authors of this book are aware that progress in any area, including science and technology, is driven by the requirement for innovation. As part of this contribution, we also learn that it is not pursued in isolation. Our own thinking is greatly impacted in this process in our various areas of research.

We acknowledge contributions by many people who helped to debug the book to various degrees. To remove the errors was a daunting challenge. In particular, Giulio Antonini wants to acknowledge Professor Antonio Orlandi for having initially introducing him to the PEEC method. Giulio Antonini is then deeply grateful to Albert E. Ruehli for his guidance in the PEEC modeling, his long lasting friendship and for the many evenings spent together, making integrals and solving equations, having a lot of fun.

Kristina Ruehli read and corrected each of the chapters multiple times and modified the text written by Swiss-German, Italian, and Chinese thinkers to conform with English grammatical forms of speech, syntax, and punctuation.

We decided to find an alternate approach for acknowledgment of contributions by other researchers, since it is clearly impossible to add all the appropriate references to the book chapters. We added a list of M.S. and Ph.D. works that have contributed to the partial element equivalent circuit (PEEC) method and thereby acknowledge the contributions by their advisors.

Albert, Giulio, Lijun