The following proceedings contains most of the contributions given at Orbis Scientiae 1981. As has become customary during the past few years, the organizers and moderators have attempted to strike a balance between reviews of the status of experimental and theoretical developments during the preceding year. We are very pleased that experimentalists representing the critical developments in new accelerator plans, neutrino oscillations, proton decay, and decay schemes of the upsilon, have seen fit to enlighten at first hand their theoretical colleagues. We believe that this interaction can be of great benefit to both groups. The reports of theorists on many of the key theoretical advances by the practitioners themselves is a particularly satisfying feature of this series of conferences and is a tribute to the care and wisdom of the session moderators. Although it has not been a customary editorial practice, we feel that it is particularly appropriate to point out that the 1981 recipient of the J. Robert Oppenheimer Memorial Prize was Professor Frederick Reines, of University of California, Irvine, for his pioneering experiments which first experimentally estab lished the existence of the neutrino. The flurry of activit- experimental and theoretical - generated by recent evidence for massive neutrinos is amply reflected in the contents of this volume. The enthusiasm and skill of Mrs. Helga S. Billings and Mrs. Susan L. Maxon in the organization and the running of the con ference, as well as in the preparation of these proceedings, is gratefully acknowledged."

Presentations on the International Conference on Technology for the Global Economic, Environmental Survival and Prosperity; R.A. Krakowski, J.G. Martin. Global Energy Demand and Energy Security Projections in the Coming Century: Global Economy, Environment, Resources, and Population Issues: The Realities of Sustainable Development in the Twenty-First Century; W. Martin. The Nuclear Fuel Cycle and Other Features of Nuclear Power, Reaching a Public Consensus; R. Wilson. Relevance of International Consensus Policies on Alternative National Energy Strategies as Related to the Regional Needs, Environmental Impact, and Geopolitical Trends: Energy Technology Progress for Sustainable Development; D.E. Arvizu, T.E. Drennen. Education on Energy and Global Issues: The Importance of Education for Nuclear Energy; G. Clark. Global Initiatives for the Future of Nuclear Energy: The Los Alamos National Laboratory Nuclear Vision Project; E.D. Arthur, R.L. Wagner, Jr. Nuclear Technologies: Boron Neutron Capture Therapy of Malignant Brain Tumors at the Brookhaven Medical Research Reactor; D.D. Joel et al. Key Issues in Nuclear Power: A World Commission on Nuclear Energy: Reasons and Purpose; P. Beck. 12 Additional Articles. Index.

In this memorial volume, twenty-four of Dirac's closest friends, colleagues and contemporaries remember him with affection. Dirac, who died in 1984, was unquestionably one of the greatest physicists of the twentieth century. The book describes his human side, with many anecdotes about the man with a reputation for silence. His immense influence on modern physics is surveyed in chapters written by eminent scientists. Dirac was awarded the Nobel Prize for Physics in 1933 at the age of thiry-one. His tremendous contributions to the field included his prediction of the magnetic moment and antiparticles as well as the spin of the electron. His formulations of the quantum field theory, statistics of particles and fields, his work on gravitational waves, and his prediction of magnetic monopoles stand as monuments to his originality and deep understanding of natural phenomena. This book will appeal to anyone interested in the development of quantum theory or in Paul Dirac.