Another excellent book long out of print but much in demand. This book is pulled together by Ramanujan's primary mentor, G. H. Hardy, who was the first to recognize the amazing nature of Ramanujan's ideas. Another exceptional classic from the Chelsea list.

This text addresses the modeling of vibrating systems with the perspective of finding the model of minimum complexity which accounts for the physics of the phenomena at play. The first half of the book (Ch.1-6) deals with the dynamics of discrete and continuous mechanical systems; the classical approach emphasizes the use of Lagrange's equations. The second half of the book (Ch.7-12) deals with more advanced topics, rarely encountered in the existing literature: seismic excitation, random vibration (including fatigue), rotor dynamics, vibration isolation and dynamic vibration absorbers; the final chapter is an introduction to active control of vibrations. The first part of this text may be used as a one semester course for 3rd year students in Mechanical, Aerospace or Civil Engineering. The second part of the text is intended for graduate classes. A set of problems is provided at the end of every chapter. The author has a 35 years experience in various aspects of Structural dynamics, both in industry (nuclear and aerospace) and in academia; he was one of the pioneers in the field of active structures. He is the author of several books on random vibration, active structures and structural control.

Almost every thoughtful person wonders at some time why morality says what it says and how, if at all, it speaks to us. David Wiggins surveys the answers most commonly proposed for such questions--and does so in a way that the thinking reader, increasingly perplexed by the everyday problem of moral philosophy, can follow. His work is thus an introduction to ethics that presupposes nothing more than the reader's willingness to read philosophical proposals closely and literally. Gathering insights from Hume, Kant, the utilitarians, and a twentieth-century assortment of post-utilitarian thinkers, and drawing on sources as diverse as Aristotle, Simone Weil, and Philippa Foot, Wiggins points to the special role of the sentiments of solidarity and reciprocity that human beings will find within themselves. After examining the part such sentiments play in sustaining our ordinary ideas of agency and responsibility, he searches the political sphere for a neo-Aristotelian account of justice that will cohere with such an account of morality. Finally, Wiggins turns to the standing of morality and the question of the objectivity or reality of ethical demands. As the need arises at various points in the book, he pursues a variety of related issues and engages additional thinkers--Plato, C. S. Peirce, Darwin, Schopenhauer, Leibniz, John Rawls, Montaigne and others--always emphasizing the words of the philosophers under discussion, and giving readers the resources to arrive at their own viewpoint of why and how ethics matters.

12 lectures, Dornach, January 1-30, 1917 (CW 174) Although these lectures were given in 1916, they have much to teach us about today's political spin, media distortions, propaganda and downright lies--all delivered by the media on a daily basis. Rudolf Steiner's calm, methodological approach penetrates the smokescreen of accusations and counterclaims, illusions and lies, surrounding World War I. From behind this fog and under the guise of outer events, the true spiritual struggle is revealed. Steiner's words give the reader a deeper understanding of the politics and world conflicts that confront us today through the filter of popular media. Amid the turmoil of World War I, Steiner spoke out courageously against the hate, lies, and propaganda of the time. His detailed research into the spiritual impulses of human evolution allowed him to reveal the dominant role that secret brotherhoods played in events that culminated in that cataclysmic war. He warned that the retarding forces of nationalism must be overcome before Europe can find its true destiny. He also emphasized the urgent need for new social structures in order to avoid such future catastrophes. Political and social changes around the world are moving at a breathless pace, hurtling us all toward an uncertain future. These lectures illuminate much of what lies behind today's turbulent events and the scenes played out on the nightly news. Like volume 1, this edition is placed within a modern context and introduced by Terry Boardman. This volume is a translation from German of Zeitgeschichtliche Betrachtungen. Das Karma der Unwahrhaftigkeit - Zweiter Teil. Kosmische und Menschliche Geschichte Band V (GA 174).