This digest describes and defines the various components of an expert system, e.g., a computerized tool designed to enhance the quality and availability of knowledge required by decision makers. It is noted that expert systems differ from conventional applications software in the following areas: (1) the existence of the expert systems shell, or…

This paper compares two alternative computer architectures that have been proposed to provide the control mechanism that enables an intelligent tutoring system to decide what instructional action to perform next, i.e., discourse management networks and blackboards. The claim that an intelligent tutoring system controlled by a blackboard…

Focuses on the role of the computer system in group decision making. Two systems used in solving negotiating problems--NEGO and MEDIATOR--and three procedures that can be utilized to develop group decision support systems are analyzed, based on multicriteria decision analysis and mathematical programming models. (Author/LRW)

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…

With the increased demand and interest in electronic performance support systems (EPSS), particularly for supporting knowledge-based problems solving expertise in the information age (Gustafson, 2000; Dickelman, 2000; Kasvi & Vartiainen, 2000), instructional designers are facing a new challenge designing a system that could deliver (or…

This paper discusses a generic query tool that enables an end user to query a metadata store through filters that impose search criteria on attributes. The Metadata Query Tool (MQT) is generic in the sense that it dynamically creates its user interface, based on configuration files that define the metadata scheme and the query functionalities.…

A museum can talk to its audience through a variety of channels, such as Web sites, help desks, human guides, brochures. A considerable effort is being made by museums to integrate these different means. The Web site can be designed to be reachable or even updateable from visitors inside the museum via touchscreen and wireless devices. But these…

Examines how HTML can be used to quickly and easily improve a Web site's typography. Discusses the importance of size control; using the "FACE" attribute; and color consideration. (AEF)

Proposes that object-oriented (OO) analysis, design, and programming methods, currently having a major impact on computing, will play an increasing role in shaping the paradigms of performance technology--particularly in instructional design (ID). Ties this crossover of OO from computing to ID to design trends and ongoing research in ID. (AEF)

Reports on the human factors considered in the design and implementation of a digital museum for historic costume. Starting with an elicitation and analysis of the qualitative and functional needs of its users, an evolutionary prototype was developed for a model of digital archiving that delivers a gratifying Web experience, visually and…

Details the rationale, evaluation and implementation of use scenarios-structured narrative descriptions of envisioned system use-in the development of the Alexandria Digital Earth Prototype (ADEPT). Discusses the strengths of the scenario approach, obstacles to their use, and lessons learned in the overall development process. (Author/AEF)

Proposes the use of a special purpose drop-in firewall/VPN gateway called Sieve, that can be inserted between the mobile workstation and the network to provide individualized security services for that particular station. Discusses features and advantages of the system and demonstrates how Sieve was used in various application areas such as at…

Introduces an extension of the Session Initiation Protocol (SIP) for closed multiparty conferences; the extension expands SIP for discovery of participant identities in a conference, and ensures that each participant is notified before a new participant joins. Verifies this extension by applying it to two SIP conference models. Concludes with an…

Discussion of computer-supported collaborative learning (CSCL) focuses on the way in which current instructional design theories can be used to design collaborative learning environments in primary and secondary schools. Highlights include definitions of CSCL; CSCL research, including cognitive approach, systems design, and curricular…

Discussion of computer-assisted learning (CAL) and the instructional functions of audio highlights the development of an interactional audio-CAL system used for second-language learning. Levels of interactivity in media are discussed, hardware that would add audio to a CAL system is described, and future research is suggested. (10 references) (LRW)