The national science standards, along with prominent researchers, call for increased focus on scientific argumentation in the classroom. Over the past decade, researchers have developed sophisticated online science learning environments to support these opportunities for scientific argumentation. Assessing the quality of dialogic argumentation,…

Online museums could benefit from digital "lifelike" characters in order to guide users to virtual tours and to customize the tour information to users' interests. Digital characters have been explored in online museum web sites with different degrees of interaction and modes of communication. Such research, however, does not explore…

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…

Examines computer conferencing systems for distance education from a design perspective. Outlines structured and unstructured communication, organization and management of communication structures, and functions for users and managers of conferencing environments. Contrasts Web- and non Web-conferencing. Suggests how to choose a…

The authors developed a Web-based negotiation system that is closely modeled on real-world transactions. This paper illustrates the generality of the system by discussing two disparate applications of the system: one taken from business and the other from collaborative e-learning. The application generates, in real time, transparency-controlled…

Multicasting is a necessity for a broadband metro-area-network; however security problems exist with current multicast protocols. A stateful multicast access control mechanism, based on MAPE, is proposed. The architecture of MAPE is discussed, as well as the states maintained and messages exchanged. The scheme is flexible and scalable. (Author/AEF)

Examines current limitations of Web-based learning systems (WBLS) in higher education and describes a prototype Web-based Asynchronous Synchronous Environment (WASE) that is designed to circumvent those limitations. Includes 10 figures and 2 tables. (AEF)

Presents a cooperative information system for remote medical imaging diagnosis. General computer-supported cooperative work (CSCW) problems addressed are definition of a procedure for the design of user-centered cooperative systems (conceptual level); and improvement of user feedback and optimization of the communication bandwidth in highly…

MOOs (Multi-User, Object-Oriented Environments), which were designed originally as spaces for online social interaction, are increasingly recognized today for their value as educational tools. This book brings together a diverse group of experts whose contributions help answer questions and dispel myths surrounding MOOs and their use in education.…

This paper describes the experience of the Faculty of Economics at the University of Trento, Italy, in delivering online courses through the Web. The faculty chose to design and build its own system from scratch rather than buy one off the shelf. The paper discusses the considerations informing this decision, and presents the main functionalities…

Reviews efforts by the Arabian Gulf Region (21 countries) to develop the ARABMARC exchange format for cataloging non-Roman scripts. Provides details of the availability of the Arabic script support in various automated systems in operation in the Gulf Region. Presents a critical review of the Arabic script support on the Research Libraries…

Reviews the literature on the interactivity concept from the perspectives of communication, computer-assisted instruction, distance education, and interactive dimensions and functions for Web systems. Proposes a technical framework for including such dimensions and functions in Web-based learning systems. Discusses evaluation feedback. Interaction…

A "cognote" system was developed for coding electronic discussion groups and promoting critical thinking. Previous literature has provided an account of the strategy as applied to several academic settings. This paper addresses the research around establishing the inter-rater reliability of the cognote system. The findings suggest three indicators…

This paper proposes a user-centered framework for intranet design that is based on an understanding of people, their typical problems, information behaviors, and situated contexts. It is argued that by adopting such an approach, intranets can be designed which facilitate organizational information access and use. The first section of the paper…

The goal of this study is to show how some concepts and techniques from disciplines outside Instructional Systems Development (ISD) have the potential to extend and enhance the traditional view of ISD practice when they are employed very early in the ISD process. The concepts and techniques employed were user-centered in design and usability, and…