Numerous radio stations across the nation perform nonbroadcast services in areas ranging from aviation, forestry protection, and telephone maintenance to amateur and citizen radio. These services can be grouped in four general categories: (1) safety, (2) industry, (3) land transportation, and (4) miscellaneous purposes. This bulletin briefly…

Explains how to approach the school administration when soliciting funds for the skydiving club in the school. (GA)

Presents a bibliography of books for upper elementary students. The books deal with aspects of space in the seventies, changing concepts of the universe, and how today's science and technology are trying to answer the questions these concepts raise. (Author/GA)

Describes a simulated experiment in which a ship's position is determined by the Doppler principle. The formulas derived for the real satellite system are given. (CC)

A technique is illustrated for solving relative motion problems using a maneuvering board and vector algebra. The technique can be used to visually illustrate properties of vector algebra in a non-theoretical context. (MP)

Describes research and technological development relating to navigation on the oceans via sound, particularly via underwater sound. (SL)

Describes how an electronic greeting card Web site, Egreetings, redesigned the site to improve the number of greetings sent by users. Goals included reorganizing the card collection, including taxonomy and controlled vocabulary; improving navigation and searching; placing ads and promotions; developing a music greeting collection; and improving…

Discussion of electronic commerce focuses on Web site evaluation criteria and applies them to different industry groups in Korea. Defines six categories of Web site evaluation criteria: business function, corporate credibility, contents reliability, Web site attractiveness, systematic structure, and navigation; and discusses differences between…

Discusses access methods in hypermedia and information retrieval and describes a research project in which similarity measures have been extended to include imprecise matching over different dimensions of structured classification schemes. The semantic similarity of information units forms the basis for the automatic construction of links and is…

Pathfinder is a graphic theoretic technique used to analyze proximity data. This study evaluates its validity: (1) for representing and comparing individuals' navigation through a computer-based hypermedia environment; and (2) for generating an empirically-derived path that represents a set of individual navigational paths during computer-assisted…

Discusses Web-based learning tools and reports results from a study at the University of Victoria that compared and evaluated two commercially available learning tools. Considers usability issues and discusses navigation, customization, student management, content creation, and students' perceptions. (Author/LRW)

Explains the sport of orienteering in which participants use detailed topographic maps and compasses to reach control points along a course. Describes the history of the sport and its minimal success in the United States. Presents several versions of the sport and identifies the demographics of participants. (KS)

Describes two studies of college students that examined the effects of navigational aids on navigation and learning in hypertext. The first examined the effects of spatial maps and textual contents lists on students' ability to locate information; the second experiment compared a spatial map, a conceptual map and no aid on both navigation and…

Discussion of changes in the banking industry focuses on an analysis of 12 Internet banking operations in the United Kingdom. Topics include delivery strategies; customer demand and requirements; and an evaluation of banking Web sites that considers speed, content and design, navigation, interactivity, and security. (LRW)

Reviews published findings from empirical studies of hypermedia learning and cognitive styles and classifies them into five themes: nonlinear learning, learner control, navigation in hyperspace, matching and mismatching, and learning effectiveness. Presents a learning model and discusses implications for the design of hypermedia learning systems.…