This book deals with flows over propellers operating behind ships, and the hydrodynamic forces and moments which the propeller generates on the shaft and on the ship hull. The first part of the book is devoted to fundamentals of the flow about hydrofoil sections and wings, propellers in uniform flow and pragmatic design guides for analysis and performance. The second part covers the development of unsteady section and blade forces arising from operation in non-uniform hull wakes. The problem of a non-cavitating, wide-bladed propeller in a wake is treated by a new and completely developed theory. A final chapter discusses the optimisation of efficiency of compound propulsors. The authors have taken great care to clearly describe physical concepts and mathematical steps. An appendix provides a concise introduction to (or reprise of) the mathematical techniques used.

The question of truth has never been more urgent than today, when the distortion of facts and the imposition of pseudo-realities in the service of the powerful have become the order of the day. In The Paradox of Being Poul Andersen addresses the concept of truth in Chinese Daoist philosophy and ritual. His approach is unapologetically universalist, and the book may be read as a call for a new way of studying Chinese culture, one that does not shy away from approaching "the other" in terms of an engagement with "our own" philosophical heritage. The basic Chinese word for truth is zhen, which means both true and real, and it bypasses the separation of the two ideas insisted on in much of the Western philosophical tradition. Through wide-ranging research into Daoist ritual, both in history and as it survives in the present day, Andersen shows that the concept of true reality that informs this tradition posits being as a paradox anchored in the inexistent Way (Dao). The preferred way of life suggested by this insight consists in seeking to be an exception to ordinary norms and rules of behavior which nonetheless engages what is common to us all.