Presents a conceptual model for hypermedia systems used with multimedia that supports versioning, permits exploring and managing alternate configurations, maintains document histories, supports cooperative work, and provides automatic propagation of version changes. Based on the Nested Context Model, the ideas apply to any hypermedia conceptual…

Presents a computational modeling system (CMS) which is intended to provide scientific investigators with a unified computation environment and easy access to a broad range of modeling tools. A major objective of the design of CMS is to hide computational details that are irrelevant to scientific research. (53 references) (Author/JKP)

Discusses data modeling techniques for the design of information systems and presents the idea of defining a kernel for object role modeling (ORM) techniques upon which different drawing styles can be based. Highlights include syntactical and semantic aspects of the ORM kernel; entity relationships; and the NIAM modeling technique. (50 references)…

Presents an improved inverted region quadtree variation called Dynamic Inverted Quadtree that is able to support and index a pictorial database. Pattern-searching algorithms are described, and the space needs of Fully Inverted and Dynamic Inverted Quadtrees are analytically compared based on a model of image randomness expressed as a branching…

Discussion of multimedia computing and multimedia information systems that contain audio and video data focuses on how to implement buffer sharing in continuous-media systems based on slots and portions. Disk utilization and transition periods are considered, and future work is described. (LRW)

Presents a seven-step methodology for utilizing integrity constraint knowledge from heterogeneous databases. Describes generating a set of integrity constraints applicable at the integrated level from constraints specified on local databases. Introduces the concept of constraint-based relationships between objects in heterogeneous databases;…

Discusses movie on demand (MOD) servers, which are computer systems that store movies in compressed digital form for broadcast cable television systems. Highlights include network bandwidths, a disk-based storage architecture for a MOD server, implementing VCR (video cassette recorder) functions to movie viewing, and buffers. (LRW)

Presents a formal object-oriented specification model (OSS) for computer software system development that is supported by a tool that automatically generates a prototype from an object-oriented analysis model (OSA) instance, lets the user examine the prototype, and permits the user to refine the OSA model instance to generate a requirements…

Investigates the manipulation of large sets of two-dimensional data representing multiple overlapping features, and presents a new access method, the MOF-tree. Analyzes storage requirements and time with respect to window query operations involving multiple features. Examines both the pointer-based and pointerless MOF-tree representations.…

Identifies weaknesses of conceptual modelling languages for the problem domain of information systems (IS) development. Outlines an approach called facet modelling of real-world problem domains to deal with the complexity of contemporary analysis problems. Shows how facet models can be defined and visualized; discusses facet modelling in relation…

Proposes a unifying framework based on speech act theory, which reconciliates the representation and communication roles of information systems. Focuses on how communication can be modeled by means of discourses, which are viewed as sequences of events; discusses implications for future research. (Author/AEF)

Investigates new design options for extended schema versioning support for multitemporal relational databases. Discusses the improved functionalities they may provide. Outlines options and basic motivations for the new design solutions, as well as techniques for the management of proposed schema versioning solutions, includes algorithms and…