The definition of a production function and the characteristics of an abstract technology are related to the practices economists have used in designing models for explaining technological change. It is found that all models of technological change have sought to account for the change rather than explain it. (Author)

Major consequences of present and additional environmental quantities of DDT pesticide are predictable by mathematical models of transport, accumulation and concentration mechanisms in the Wisconsin regional ecosystem. High solubility and stability produce increased DDT concentrations at high organism trophic levels within world biosphere…

Reviews literature on environmental information since 1986, with special emphasis on machine-readable sources as reported in the published literature. Highlights include a new model for studying environmental issues; environmental communication studies, including user studies; and environmental information sources, including pollution media and…

In the direction-dependent approach to location modeling developed herein, the distance within which a point of demand can find service from a facility depends on direction of measurement. The utility of the approach is illustrated through an application to groundwater remediation. (Author/MDH)

This report is part of a series from the Department of Energy on the use of solar energy in heating buildings. Described here is a new system for year around collection and storage of solar energy. This system has been operated at the University of Virginia for over a year. Composed of an underground hot water storage system and solar collection,…

This report contains one of the first procedures available to environmental impact statements. The heart of the system is a matrix which is general enough to be used as a reference checklist or a reminder of the full range of actions and impacts on the environment that may relate to any proposed action. This comparatively simple system is intended…

NEW EDUCATIONAL SPECIFICATIONS HAVE CAUSED ARCHITECTS TO USE NEW FORMS WITH THEIR RESULTING NATURAL LIGHTING PROBLEMS. THE PROBLEM CAN BE ENGINEERED WITH THE USE OF MODELS. PREDICTION OF LIGHTING PERFORMANCE IN A BUILDING CAN BE MADE EARLY IN PLANNING. THIS METHOD PROVIDES FOR THE TESTING OF A VARIETY OF TRIAL SCHEMES ECONOMICALLY AND RAPIDLY.…

Discusses research on man-environment relations and initiates the process of formulating a research paradigm for studying environmental moves and readjustments. Uses a renovated academic center as a specimen case. (JR)

The Regional Air Pollution Study (RAPS) to be conducted in St. Louis, is the largest air monitoring program of the Environmental Protection Agency. A key segment will be the collection of a data base on which this system of mathematical models can be tested and upon which submodels can be validated. (BL)

The literature on crowding in residential and laboratory settings is reviewed, and a model of crowding highlighting the importance of perceived control and group orientation is discussed. (EF)

Discusses the use of the human health risk assessment model as a basis for developing ecological risk assessment (ERA). For ERA, risk to individuals is less important than the survival of the population, with the exception of endangered species. Suggests that ERA take into account the relative reproductive value of the potentially impacted…

Since the statistical theories of turbulence that have developed over the last twenty or thirty years are too abstract and unreliable to be of much use to chemical engineers, this paper introduces the techniques of single point models and suggests some areas of needed research. (BB)

This study formulates an empirically derived model of the cognitive transformation of information from urban geographic fields to map representation. It appears that four variables (subject, touring, environmental, map) all contribute to levels of map performance. (BT)

A second-year biology class at Sedro-Woolley High School is part of an interdisciplinary program designed to develop a heightened awareness of environmental problems. A model for such a course is explained and evaluated. Students' awareness of values increases through the use of problem-solving techniques, audiovisual aids, articles and books, and…