Describes a genetics activity illustrating genetic variation, mutation, and influence of environmental factors on genotypic expression. Irridiated bean seeds are planted and observed (x-rayed by dentist's x-ray machine at different exposures and for different times). Questions to extend the activity are discussed. (Author/JN)

The energy required to build and install solar space- and water-heating equipment is compared to the energy saved under two solar growth paths corresponding to high and low rates of solar technology implementation. (Author/RE)

Traces the development of quantum field theory over the last 50 years beginning with the research of Paul Dirac. Includes past and current research endeavors of various scientists. (JN)

Addressed to readers who know nothing of quantum theory, a hypothetical device containing some black boxes is described and relevant features of the device's behavior are presented. The conundrum posed by the existence of such a device is pointed out. An appendix explains what is in the black boxes. (SK)

Discusses the role that radiation-chemical techniques play in the study of the electron transfer process. (CS)

Describes common features in the radiation chemistry of food components, and illustrates how product yields are predicted. Presents data that pertain to the radiolysis of the nitrate ion, metmyoglobin, myosin, and tripalmitin. (CS)

A survey of dental schools revealed little standardization of student requirements for dental radiography in the United States. There was a high degree of variability as to what constituted a full radiographic survey, which has implications concerning the maximum limits to patient exposure to radiation. (Author/MLW)

The detachable magazine segment is a guide to sources of solar energy information sources. Included are (1) organizations; (2) bibliographies; (3) educational materials; (4) audiovisuals; (5) analytical tools; (6) construction plows; (7) directories and catalogues; and (8) miscellaneous. (Author/RE)

Two potential health hazards have been suggested in relation to long-term use of computer video monitors: radiation and vision problems (fatigue, eyestrain, eye damage). This article examines some available evidence on these issues. Journal availability: Hayden Publishing Company, 50 Essex Street, Rochelle Park, NJ 07662. (SJL)

The Einstein-Hopf model for the thermodynamic equilibrium between the electromagnetic field and dipole oscillators is considered within the framework of quantum mechanics. Both the wave and particle aspects of the Einstein fluctuation formula are interpreted in terms of the fundamental absorption and emission processes. (Author/SK)

Facilities Newsfront presents highlights about an art school, a revolving medical school auditorium, a student parking ban, a denunciation of rash mainstreaming, and the monitoring of a solar installation in a Michigan school. (MLF)

The author derives, applying perturbation theory, from a simple astronomical model the approximate periods of secular variation of some of the parameters of the Earth's orbit and relates these periods to the past climate of the Earth, indicating the difficulties in predicting the climate of the future. (GA)

Components of solar energy systems are described, the development of the solar industry discussed, and implications are drawn for employment opportunities in industries (which may expand into new, solar-related areas) and in the professions, from law to sales, upon the advent of solar heating. (AJ)

Research on conceptual change emphasizes the importance of factors in the cognitive domain. This research argues that models of conceptual change learning should also encompass issues of affect, conation, and self-esteem. The use of these expressions is explained via four case studies on members of a rural village concerning informal learning…

Outlines the Cosmic Background Explorer (COBE) mission to measure celestial radiation. Describes the instruments used and experiments involving differential microwave radiometers, and a far infrared absolute spectrophotometer. (YP)