This report discusses biological rhythms: what they are, how they are controlled by the brain, and the role they play in regulating physiological and cognitive functions. The major focus of the report is the examination of the effects of nonstandard work hours on biological rhythms and how these effects can interact with other factors to affect the health, performance, and safety of workers.

This background paper focuses on the Federal role in supporting a national high-performance computing initiative. High-performance ‘‘supercomputers’ * are fast becoming tools of international competition and they play an important role in such areas as scientific research, weather forecasting, and popular entertainment. They may prove to be the key to maintaining America’s preeminence in science and engineering. The automotive, aerospace, electronic, and pharmaceutical industries are becoming more reliant on the use of high-performance computers in the analysis, engineering, design, and manufacture of high-technology products.

This report discusses the study that has been proposed as a partial response to the mandate of Public Law 99-272; that law also requires approval from the Director of OTA before any such studies are undertaken, which is the reason for this review. This study is one of three that make up the full VA response to the mandate to look into the health of women Vietnam veterans.

This background paper, which describes the state-of the- art of identifying substances that can harm the immune system, represents one response to the committee’s request. Chapter 2 provides basic information about the principal components of the immune system and the general consequences that stem from perturbations to it. Chapter 3 describes methods for evaluating chemical immunotoxicity and reports on some known or suspected immunotoxicants. Chapter 4 summarizes Federal research and regulatory activities related to immunotoxicity.

The report responds to the request of numerous Members of Congress to review the physical, emotional, and behavioral health status of contemporary American adolescents, including adolescents in groups who might be more likely to be in special need of health-related interventions: adolescents living in poverty, adolescents from racial and ethnic minority groups, Native American adolescents, and adolescents in rural areas.

This report is a comprehensive look at the problem as we now know it, the public concerns about the problem, and DOE’s plans for addressing it. It focuses especially on the need for additional attention to those areas which DOE has neither the capability nor the credibility to handle.

OTA’s report responds to the request of numerous Members of Congress to review the physical, emotional, and behavioral health status of contemporary American adolescents, including adolescents in groups who might be more likely to be in special need of health-related interventions: adolescents living in poverty, adolescents from racial and ethnic minority groups, Native American adolescents, and adolescents in rural areas.

This OTA’s report responds to the request of numerous Members of Congress to review the physical, emotional, and behavioral health status of contemporary American adolescents, including adolescents in groups who might be more likely to be in special need of health-related interventions: adolescents living in poverty, adolescents from racial and ethnic minority groups, Native American adolescents, and adolescents in rural areas. In addition, OTA was asked to: 1 ) identify risk and protective factors for adolescent health problems and integrate national data in order to understand the clustering of specific adolescent problems, 2) evaluate options in the organization of health services and technologies available to adolescents (including accessibility and financing), 3) assess options in the conduct of national health surveys to improve collection of adolescent health statistics, and 4) identify gaps in research on the health and behavior of adolescents.

This report focuses on the Federal Government, the Nation’s largest single energy consumer, in terms of the opportunities and constraints for the use of energy efficient technologies. Energy efficient technologies could greatly reduce energy demand growth and spending in the United States and lessen environmental impacts while increasing productivity. Yet, in today’s public and private markets, adoption rates for many of these technologies are low. This report reviews past and current efforts to improve Federal energy efficiency and discusses policy options that could accelerate the adoption of these measures by the Federal Government.

This report examines emerging U.S. national security requirements, surveys the current conditions and trends in the DTIB, and proposes some desirable characteristics for the future base. The report concludes with a discussion of the broad strategic choices and tactical decisions that must be considered as the Nation moves to this future base.