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Browsing 1989 5th South African Computer Symposium by Title

Browsing 1989 5th South African Computer Symposium by Title

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  • The case for functional programming 
    Wentworth, E.P. (SAICS, 1989-11-29)
    Functional programming has gained a foothold in academic institutions, and the first commercial interests have been noted. The paradigm is presented by way of some small examples, and arguments are given in favour of this ...
  • A comparison of assignment and matching lower bounds for the symmetric travelling salesman problem 
    Smith, T.H.C. Meyer, T.W.S. (SAICS, 1989-11-29)
    Improved lower bounds for the Euclidean travelling salesman problem, based on the assignment relaxation, have previously been presented. We present computational experience which indicates that the (continuous) 2-matching ...
  • Data structuring via functions 
    Venter, B.H. (SAICS, 1989-11-29)
    A programming language data model is introduced, based on the notions that variables are functions and types are sets of values. It is shown that, despite the simplicity of the underlying mathematical formalism, the data ...
  • Database consistency under UNIX 
    Viktor, H.L. (SAICS, 1989-11-29)
    A recovery technique to facilitate the recovery from system failures should ensure a consistent database state at all times. The UNIX write system call uses a delayed-write policy. Data blocks are kept in a buffer cache ...
  • A design environment for semantic data models 
    Kambanis, J. (SAICS, 1989-11-29)
    This paper describes the functionality and architecture of a Semantic Data Modeling environment. It integrates User Interface techniques used in Computer Aided Software Engineering and Expert Systems shells into a system ...
  • Ecological applications using a novel expert system shell 
    Riordan, D. Bradshaw, J.A. Carden, K.J. (SAICS, 1989-11-29)
    Much of the information used by ecologists in modeling and decision making is imprecise. The imprecision arises both from data which is inexact or incom­plete and from the use of ecological principles which are sometimes ...
  • Experience with the development of a neural network simulator 
    Cloete, I. Ludik, J. (SAICS, 1989-11-29)
    Researchers experimenting with structured neural networks must be able to imple­ment and test their ideas. Since most of the network models presume much structure, and network architecture design is a major component in ...
  • A file server for a multi-transputer UNIX system 
    Hoffman, K. Smit, G. de V. (SAICS, 1989-11-29)
    The DISTRIX operating system is a multiprocessor UNIX-like distributed operating system. It consists of a number of satellite processors connected to central servers. The system is based on the MINIX operating system, ...
  • Finding regular paths in acyclic graphs 
    Wood, P.T. (SAICS, 1989-11-29)
    Increasing the expressive power of relational query languages by providing some form of recursion is currently a topic of much research. For many recursive queries in relational databases, a relation can be represented as ...
  • Generalized product form solutions for multiserver centres with concurrent classes of customers 
    Krzesinski, A.E. Crosby, S. (SAICS, 1989-11-29)
    The MultiServer centre with Concurrent Classes of Customers (MSCCC) is a service centre consisting of B parallel identical exponential servers. The customers requesting service at the MSCCC centre belong to K classes. ...
  • Generalized product form solutions for multiserver centres with concurrent classes of customers 
    Krzesinski, A.E. Crosby, S. (SAICS, 1989-11-29)
    The MultiServer centre with Concurrent Classes of Customers (MSCCC) is a service centre consisting of B parallel identical exponential servers. The customers requesting service at the MSCCC centre belong to K classes. ...
  • Implementing UNIX on the INMOS transputer 
    McCullagh, P. Smit, G. de V. (SAICS, 1989-11-29)
    This paper examines the transputer as the target for a UNIX port and discusses specific problems that were encountered during implementation of a UNIX kernel in a transputer environment. Some solutions to the problems are ...
  • Induction of decision trees in a domain with continuous attributes 
    Cloete, I. Theron, H. (SAICS, 1989-11-29)
    Quinlan's ID3 is a popular and efficient algorithm for inducing decision trees from concept examples, where the examples are presented as vectors of attribute-value pairs. For attributes with large, continuous domains ID3 ...
  • Integrated network management 
    Roos, J.D. Von Backström, L. (SAICS, 1989-11-29)
    Over the last decade, networks have evolved into sophisticated, multi-vendor, multi-protocol networks, which need to be properly managed and protected. The preferred way of accomplishing this, is through Integrated Network ...
  • An interrupt driven paradigm of concurrent programming 
    Clayton, P.G. (SAICS, 1989-11-29)
    This paper introduces a class of concurrent programming construct based on an interrupt driven paradigm. This programming model is designed to simplify the application of conventional imperative programming techniques to ...
  • A methodology for the management of end-user computing 
    Eloff, J.H.P. Eloff, M.M. (SAICS, 1989-11-29)
    End-user computing is becoming an issue of strategic importance in the computer industry today. We have seen many organizations implementing end-user computing according to the guidelines as included in conventional software ...
  • A model for conceptual views of a task realm 
    Short, R.C.M. (SAICS, 1989-11-29)
    An earlier article in this journal argued the case for the developers of an information system, for a particular task realm, to begin the development with the determination of the conceptual views of that realm held by the ...
  • A multi-criteria partitioning technique for information system design 
    Mende, J. (SAICS, 1989-11-29)
    In order to design and operate a complex computer based information system, one needs to partition its transformation process into modules of manageable size. The same process can be partitioned in many different ways, ...
  • Object-oriented systems, so what? 
    Barth, Gerhard (SAICS, 1989-11-29)
  • Persistent sets - an alternative to relational databases 
    Berman, S. (SAICS, 1989-11-29)
    Persistent programming languages, which extend conventional languages to treat database data as well, are becoming viable alternatives to Database Management Systems. However, they are currently lacking in one essential ...

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