Explains the technologies of electronic imaging as background for other articles in this section, focusing on technologies seen by the developer or user of electronic imaging applications. Topics discussed include image acquisition, storage, retrieval, compression, transmission, display, manipulation, and printing; standards and architectural…

Describes construction of citation network systems and some subsystems (time sequence network, cocitation network, couple network). Establishes structural modeling of these systems by means of system engineering. Explains and analyzes citation network systems. Includes graphs and charts. (JAK)

In the past three years, higher education institutions have made a number of moves to secure their critical systems and protect their users, resulting in a marked change in the techniques used to combat security threats. Today, continued progress may depend on the development of an enterprise IT security program. (Contains 10 notes.)

This article reports on a project that explores strategies for narrowing the digital divide by providing a practicable e-learning option for the millions living outside the ambit of high performance computing and communication technology. The concept is introduced of a "learning computer," a low bandwidth tool that provides a simplified,…

This hearing explores how the High Performance Computing and Communications Program (HPCC) relates to the technology needs of industry. Testimony and prepared statements from the following witnesses on future effects of computing and networking technologies on their companies are included: (1) F. Brett Berlin, president, Brett Berlin Associates,…

The objectives of this Congressional hearing on high definition information systems were: (1) to receive testimony on standards for systems that permit interoperability between the computer, communications, and broadcasting industries; (2) to examine the implications of the Grand Alliance, an agreement by high definition television (HDTV)…

This report begins by discussing the implications of a constructivist epistemology for instructional design and development, as well as drawbacks of the content database in instruction, the lack of special tools to help the learner actively construct knowledge, and emphasis on learning environments based on individual learning. The whole learning…

Discusses the concept of the intranet, comparing and contrasting it with groupware, and presents an argument for its value based on technical and information management considerations. Presents an intranet development project for an academic organization and describes a portable, user-centered and team-based methodology for the design and…

Describes how the structure of hypermedia systems can be represented by a simple matrix which is the basis for applying standard techniques of network analysis, and demonstrates the potential influence of these techniques on learning processes or outcomes. Also discusses theoretical and practical implications for future hypermedia research. (AEF)

Presents an overview of the security architecture of the IP multimedia core network subsystem (IMS) of the third generation mobile system, known in Europe as UMTS. Discusses IMS security requirements; IMS security architecture; authentication between IMS user and home network; integrity and confidentiality for IMS signalling; and future aspects of…

Describes the function of the Open Systems Interconnection (OSI) Z39.50 protocol, which allows for construction of information "servers"--i.e., resources attached to a computer communications network that can be accessed by client machines to retrieve information. The relationship of Z39.5 to other OSI protocols is explained. (23…

Discusses changes and improvements in the integrated services digital network (ISDN) that have caused ISDN to reemerge as a viable, cost-effective technology for use in home and office workstations. Reviews changes in demand, standards, availability, ease of use, and cost, and displays a diagram of a typical ISDN terminal adapter setup. (JMV)

Describes issues an organization must consider when preparing for the creation and installation of an international wide area network (WAN) to help link developing countries. Hardware and software needs are considered; the use of commercial vendors is discussed; a needs assessment is described; and technical and cultural difficulties are…

Local area networks (LANs) are systems of computers and peripherals connected together for the purposes of electronic mail and the convenience of sharing information and expensive resources. In planning the design of such a system, the components to consider are hardware, software, transmission media, topology, operating systems, and protocols.…

Examines common CD-ROM networking architectures: via existing operating systems (OS), thin server towers, and dedicated servers. Discusses digital video disc (DVD) and non-CD/DVD optical storage solutions and presents case studies of networks that work. (PEN)