Purpose: The purpose of this paper is to propose that the measurement of salivary amylase activity is an effective index to evaluate the stress of a ship navigator for safe navigation training and education. Design/methodology/approach: Evaluation comes from the simulator and actual on-board experiments. The subjects are real captains who have…

There is a general sense today that constructivist teaching is not up to the task of preparing students for high-stakes exams. In this article, the authors describe a highly effective constructivist approach used to teach students in a learning situation that takes the meaning of "high stakes" to another level. They talk about teachers of "cane…

This guide was created to accompany workshops on learning to use electronic networks. It is less than a complete introduction to networks, but is a good tool for those learning to use them. An introduction defines networks, discusses the most important of them, and provides other useful concepts. Understanding and using electronic mail are…

Orienteering is land navigation through unknown countryside with map and compass. This article describes an orienteering program in the Action Education Curriculum, State University of New York, College at Purchase. (KM)

This is the fifth in a series on shortened versions of the Avionics Fundamentals and Aviation Electronics Technician R (Radar) Courses. The first four studies indicated that the initial revisions of the courses led to substantial savings in training time, but that the graduates from the revised courses were slightly inferior to graduates from the…

Scientists often use the "slingshot effect" (also called the "gravity assist") of the gravitational field of a planet to increase or decrease the velocity of a spacecraft. Examples of this effect, puzzling aspects, a qualitative explanation, details of necessary calculations, a thermodynamic analogy, and other topics are discussed. (JN)

Effective navigation is becoming more and more critical to the success of electronic commerce (E-commerce). It remains a challenge for educational technologists and Web designers to develop Web systems that can help customers find products or services without experiencing disorientation problems and cognitive overload. Many E-commerce Web sites…

Discusses navigation in instructional hypertext programs and describes two preliminary studies that investigated concrete versus abstract representations for backward navigation. Topics include representation and hypermedia sign systems; and consistency in the forms designers use for navigation buttons. (LRW)

Tracks the development of sonar from a submarine detecting device to a seabed plotting device. Describes applications of the technology in fishing and oceanography. (MDH)

Sixth graders at Kamehameha Elementary School ascended a high mountain peak, successfully orienting themselves for over 5 miles using topographical maps and compasses and the knowledge, skills, and attitudes acquired at school. The article describes the program, noting the knowledge and tools students used to accomplish their goal. (SM)

Provides a knowledge representation frame for describing walking directions on a university campus. Directional and nondirectional content of messages that were sent by either electronic mail or voice messaging are examined; sublanguage techniques used to analyze messages are explained; and future work is discussed. (nine references) (LRW)

Discusses aspects of Christopher Columbus' decision to sail west in order to reach Asia. Includes discussions concerning the shape and size of the earth as determined up to Columbus' time and conclusions he made during the journey based on his calculations. (MDH)

Discusses the use of document outlines to reduce navigation problems in hypertext. Measures of syntactic and lexical balance in an outline are proposed, and the degree to which these balances occur in a sample of documents is shown. Based on balance in an outline, a method for semiautomatically generating an outline is applied to a textbook. (45…

Presents a texture-based image-retrieval system for browsing large-scale aerial photographs. System components include texture-feature extraction, image segmentation and grouping, learning-similarity measure, and a texture-thesaurus model for fast search and indexing. Testing has demonstrated the system's effectiveness in searching and selecting…