Showing papers on "Database-centric architecture published in 1991"

Implementing actor-based primitives on distributed-memory architectures

Abstract: We are engaged in a research aiming to implement, on a highly-parallel distributed-memory architecture, a set of primitives based on the actor model. In this paper, the motivations and a number of preliminary results of the project are reported. Discussion is focused on implementation issues. The overall software architecture of the distributed run-time kernel is presented. Solutions to mail address representation and to distributed collection of garbage actors are briefly described.

Software Process Architecture Issues

Abstract: While an architecture might appear to be just describing the structure and relationships among the components of a system and the system’s interfaces with its operational environment, architectures actually fulfill a number of purposes. For software process architectures these purposes include: describing the significant components, structure, internal and external relationships and interfaces; defining graceful evolution paths and reuse variations required; guiding component selection, adaptation, composition and binding; allowing smooth assembly of the components and ccinnecting them with the surrounding environment; and providing compatibility across multiple instances. An architecture must, of course, allow provision of the needed functionality and performance, but it should, where possible, facilitate their provision and use. Any architecture must also try to address particular qualities or properties important for its system - for example, a fault-tolerant structure might help address a requirement for high reliability. A software process architecture covers (is reusable across) some sub-domain of software projects. Since a reuse architecture aims at capturing the invariant plus providing for (at least) anticipated changes and variations, one must start by deciding what can treated as stable and what variety must be accommodated. Such decisions having strong impact on an architecture include the scope of variety that must be accommodated in methods, role definitions, and standards. While many organizations may simplify their concerns by severely limiting the variety in these areas, I have had to treat thein as having significant variety. 2. WHAT ARE THE MAIN COMPONENTS OF AN ARCHITECTURE

Architecture as Index: Toward a Theory of Contingency

Abstract: Many theorists explore the problem of content in architecture in terms of representation, or the utilization of symbolic and often historicist imagery to ex-tend an object's meaning within a larger spatial/cultural context This paper suggests that an alternate mode of establishing associative content can be based in abstraction, or nonrepresentational means in terms of architecture's capacity to perform as “index” The notion of index is an attempt to understand architecture as a direct physical manifestation of an external cause based on establishing an explicit physical connection, or cross-referencing between “cause and effect” The result is an architecture contingent upon those factors that can generate an inalterable formal response, or an architecture that “makes itself”

Evaluation of integrated agent architectures

Abstract: In evaluating an integrated agent architecture, there are various questions we might hope to answer:Does the architecture provide a sufficient framework for meeting the stated requirements?

A semantics-directed partitioning of a processor architecture

Abstract: No abstract available

High-level parallel architecture for a rule-based system

Abstract: A parallel architecture for rule-based systems is generally based on techniques that reduce the execution time of a production cycle, match- select-act cycle. With these techniques, speedups in rule-based systems are limited to tenfold. We investigate a new approach to achieve higher speedups by developing a computer architecture that exploits parallelism at much higher levels. This high-level parallel architecture is based on a semantic network representation and message passing. This architecture closes the semantic-gap that exists between the application and its implementation and yields higher speedups. To demonstrate our approach, we have chosen the VLSI architecture simulation application which has inherent parallelism and demands large execution times on conventional computers. We performed functional simulations for two applications and measured close to linear speedups. In this paper, we present the applications, knowledge representation scheme, architecture suitable for this set of applications, and speedup measurements.© (1991) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.