Reports on research related to the theory that the nervous systems, and hence the behavior, of animals may be permanently modified during initial periods of early life in response to environmental stimuli. (GS)

Discusses security problems associated with the open publication of research relating to "unsolvable" codes. (SL)

Reviews recent research in the treatment and cause of hyperactivity in children. (SL)

Discusses social, political, and ethical aspects of conducting medical clinical trials as well as their cost, benefits, and pitfalls. (SL)

Examines new directions in ecological research in which ecologists are analyzing systems with theoretical models and are using descriptive studies to confirm and extend their studies. The development of a model relating to species equilibriums on islands is now being applied to problems of conservation of wildlife in national parks. (JR)

Reviews the issue of how to preserve the fruits of research in high technology while at the same time avoiding restrictions on researchers' freedom. One solution proposed by Congress and the current administration would prevent technical data from being transferred overseas as well as other restrictions. (Author/SK)