Describes the use of graph theory and game theory to deepen students' appreciation of Ferdinand Magellan's story and his magnificent contributions as an explorer. (MKR)

Shows how five points determine the formula of a conic section and uses the determinant as a computational device to find the coefficients in the formula. Uses symbolic, numerical, and graphical techniques. (Author/MKR)

This assessment of the reliability and validity of skills analysis programs within curriculum-based measurement (CBM), with various groups of handicapped and nonhandicapped youngsters, indicated that the skills analysis programs in spelling and math provided consistent information that related well to the primary graphed CBM scores. (Author/JDD)

Offers tips on creating interactive bulletin boards and displays designed to help elementary students develop thinking skills and number concepts and to help teachers with such daily tasks as taking attendance, keeping track of birthdays, doing lunch counts, maintaining job lists, and exploring individual student characteristics. (SM)

Discusses race and class in American politics, political empowerment, and self-efficacy and exposure to mass media. Results of a telephone survey conducted in Prince Georges County (Maryland) that examined media use, political self-efficacy, and system efficacy across race and social class are described. (Contains 37 references.) (LRW)

Reports, in French, an investigation on the use of graphic representations in problem-solving tasks of the type in Spanish Mathematical Olympiads. Analysis showed that the choice and interpretation of the first graphic representation played a decisive role in the discovery of the solution. (34 references) (Author/MKR)

A quantitative and inexpensive way to measure the rate of enzymatic reaction is provided. The effects of different pH levels on the reaction rate of an enzyme from yeast are investigated and the results graphed. Background information, a list of needed materials, directions for preparing solutions, procedure, and results and discussion are…

Three problems affecting the use of a modified scree test in analyzing Delphi survey data are discussed: (1) the adequacy of the criterion; (2) the complexity of decision making; and (3) the nature of the Delphi panel. Using the modified scree test with these considerations in mind is suggested. (SLD)

Discusses access to nontextual documents in large multimedia document bases. A hybrid information retrieval model, using queries in a hypertext environment for location of browsing areas, is presented; and two experiments using cluster-based descriptions of content are reported. (23 references) (EA)

A citation analysis of the first 10 years of "Geochimica et Cosmochimica Acta" from 1951 to 1960 is described. A shift from German to English language citations and the emerging importance of the journal in the field, which is undergoing a change resulting from technological innovation, are shown. Tables and graphs are included. (EAM)

Examines how online versions of databases vary on different systems. Differences are grouped into three categories: obvious differences, including easily available information such as updating, dates covered, and price; database choice, including subfile structure, field structure, and content; and system choice, including support and system…

Discussion of expert systems focuses on a national survey that gathered information concerning the attention and investment given to expert systems by managers and computer professionals in a variety of fields. Highlights include uses of expert systems, types of computers and software used, and expert systems shells and development costs. (18…

Points of view analysis, as a way to deal with individual differences in multidimensional scaling, was largely supplanted by the weighted Euclidean model. It is argued that the approach deserves new attention, especially as a technique to analyze group differences. A streamlined and integrated process is proposed. (SLD)

Explains and illustrates a simplified use of graphical analysis for analyzing the profit-maximizing firm. Believes that graphical analysis helps college students gain a deeper understanding of marginalism and an increased ability to formulate economic problems in marginalist terms. (DB)

Discussion of models for library circulation data highlights a new statistical prediction model that creates a flexible regression curve. Linear graphs that result from previous models are discussed, bivariate discrete distributions are explained, and graphs that show library circulation for one year at a time are presented. (nine references) (LRW)