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Papers from the October 1993 symposium discuss not only AIDS and its effects on the nervous system but also address the problem from the point of view of the diverse technologies used in understanding the disease. Highlights include findings on human fetal and glioma-derived cell cultures, toxins in

Global climate change is expected to have major impacts on water resources and aquatic ecosystems. This prospect presents planners, who are already struggling to meet the demands of growing populations and economies, with new challenges. This volume examines these challenges and the resulting conceptual issues for water planning and project evaluation practices. The book is the first attempt to consider whether and how water resources, planning principles and evaluation criteria should be altered in view of the potential impacts of anthropogenically induced climate change. The ...

During the early stages of helicopter development, when helicopters were able to lift just slightly more than their own weight, the military services were eagerly seeking to obtain a variety of larger, more useful helicopters. The youthful helicopter industry expressed optimism, although at times unrealistic, in its ability to meet the military requirements. The development of the helicopter program within the Marine Corps was sparked by the foresight and imagination of the officers of the period. While early helicopters provided stepping stones for an orderly progression of the program, the...