The design and study of library information networks are enhanced by the use of the concepts which have been developed by graph theorists. This paper proposes a general network structure which is a good model for a wide variety of library and other information networks. (4 references) (Author/NH)

The present experiments were designed to study the effects of search term weighting based on very limited relevance information, supplied, for example, by one or two relevant documents. The tests simulated iterative searching as in an on-line system and show that even very little relevance information can be extremely valuable. A list of…

The NIH-EPA Chemical Information System (CIS) provides facilities useful for the characterization and identification of chemical substances in industrial, academic, regulatory, and emergency response environments. It is comprised of a variety of data bases, retrieval programs, and related processing and display programs with on-line interactive…

The role of imagery in mathematical thinking and learning is discussed. The use of diagrams and charts is suggested as promoting imagery. (MP)

Curve-stitching the parabola is used as a means of confirming many of the parabola's mathematical properties and to construct some visually stimulating designs. (MP)

Two problems related to the mean-value theorem lead into a problem requiring the use of the universal chord theorem. This latter theorem is discussed and a proof given. (MP)

Identifies points where beliefs are important when making decisions about how graphs are drawn. Describes a simple case of the reaction between 'bicarb soda' and orange or lemon juice and discusses how drawing a graph becomes a statement of belief. (KHR)

Discussion of information overload focuses on a study of masters degree students at a Hong Kong university that investigated the effectiveness of graphs as decision aids to reduce adverse effects of information overload on decision quality. Results of a simulation of a business prediction task with a sample of business managers are presented.…

Outlines the differences between the traditional and modern theoretical models of demand for money. States that the two models are often used interchangeably in textbooks, causing ambiguity. Argues against the use of linear specifications that imply that income velocity can increase without limit and that autonomous components of aggregate demand…