South African Computer Journal (SACJ): Recent submissions

  • Artificial intelligence, expert systems and business computing: Is there a problem? 
    Crossman, T.D. (South African Computer Society (SAICSIT), 1993)
    Some sources suggest that the implementation of Artificial Intelligence and Expert Systems applications (AI/ES) may create problems for the business sector. This article presents a management tool (based on the concept of ...
  • Database consistency under UNIX 
    Viktor, HL; Rennhackkamp, MH (South African Institute of Computer Scientists and Information Technologists, 1991)
    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 ...
  • Automatic vectorization 
    Tidwell, LD; Schach, Stephen R. (South African Institute of Computer Scientists and Information Technologists, 1991)
    It is becoming increasingly difficult for researchers with little or no formal computer science background to make effective use of supercomputers and other vector machines in their own fields of research. Automatic ...
  • A causal analysis of job turnover among systems analysts 
    Smith, DC; Hansen, AL; Oosthuizen, NC (South African Institute of Computer Scientists and Information Technologists, 1991)
    Staff Shortages in the Information Systems industry are a continuing problem. Job turnover of IS staff contributes to this shortage and is particularly high in South Africa. This high turnover is often attributed to ...
  • The universal relation as a database interface 
    Philips, M.J.; Berman, Sonia (South African Institute of Computer Scientists and Information Technologists, 1991)
    The universal relation is a way of overcoming users' prime database access difficulty, namely navigation through database structures. As a result there is reduced user involvement with the underlying logical database ...
  • Knowledge-based selection and combination of forecasting methods 
    Finnie, G.R. (South African Institute of Computer Scientists and Information Technologists, 1991)
    Forecasting techniques are used extensively in a variety of business (and other) applications for the analysis and prediction of various factors of interest e.g. future market demand for a specific product. However, the ...
  • An analysis of the usage of systems development methods in South Africa 
    Erlank, S; Pelteret, D; Meskin, M (South African Institute of Computer Scientists and Information Technologists, 1991)
    The systems development process is commonly described in terms of a System Development Life Cycle (SDLC). There is a wide range of tools and techniques available to the system developer, and these are typically used for ...
  • CID3: an extension of ID3 for attributes with ordered domains 
    Cloete, I; Theron, H (South African Institute of Computer Scientists and Information Technologists, 1991)
    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. If some attributes have integer or real domains ...
  • An interrupt driven paradigm of concurrent programming 
    Clayton, Peter G. (South African Institute of Computer Scientists and Information Technologists, 1991)
    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 ...
  • An ADA compatible specification language 
    Bosua, R; Du Plessis, A.L (South African Institute of Computer Scientists and Information Technologists, 1991)
    Specification languages to be used in conjunction with Ada as the implementation language have been proposed in the literature. Simultaneously, methods for the development of real-time software systems have been introduced, ...
  • Hypertext for browsing in computer aided learning 
    Barrow, J (South African Institute of Computer Scientists and Information Technologists, 1991)
    Hypertext is presented as a database accessing mechanism well-suited to computer aided learning applications. On the basis of informal experiments with prototype software, some benefits of structured hypertext are explored. ...
  • A model checker for transition systems 
    De Villiers, PJA (South African Computer Society (SAICSIT), 1992)
    A model checker automatically determines whether a model of a reactive system satisfies its specification. Temporal logic is used to specify the intended behaviour of a reactive system which is modelled as a transition ...
  • PEW: A tool for the automated performance analysis of protocols 
    Wheeler, G; Kritzinger, Pieter S. (South African Computer Society (SAICSIT), 1992)
    The Protocol Engineering Workbench (PEW) is an integrated software system or tool for the analysis of communication protocols specified using the Estelle Formal Description Technique or FDT. The execution of systems specified ...
  • Beam search in attribute-based concept induction 
    Theron, H; Cloete, I (South African Computer Society (SAICSIT), 1992)
    Thi spaper investigates the issues of specializing only a single best conjunction to employing a beam search when learning attribute-based concept descriptions using the GCA algorithm. We describe GCA, a recently introduced ...
  • An evaluation of the skill requirements of entry-level graduates in the information systems industry 
    Smith, DC; Newton, S; Riley, MJ (South African Computer Society (SAICSIT), 1992)
    Information Systems (IS), although a relatively new academic discipline, is receiving considerable attention in tertiary institutions in South Africa. Despite this, there is currently no standard curricula for IS graduates ...
  • Logic programming: ideal vs practice 
    Labuschagne, W.A.; Van der Westhuizen, PL (South African Computer Society (SAICSIT), 1992)
    The logician who encounters logic programming expects it to involve 'using predicate logic as a programming language'. He is soon disillusioned. He discovers that it really means 'programming in PROLOG', which in tum seems ...
  • Evaluating the motivating environment for information systems personnel in South Africa compared to the United States (Part II) 
    Couger, JD; Smith, DC (South African Computer Society (SAICSIT), 1992)
    The South African computer industry suffers from a shortage of skilled staff. To maximise the productivity and motivation of Information Systems (IS) staff in their current and future jobs is therefore an important management ...
  • Social responsibility for computing professionals and students 
    Clarke, MC (South African Computer Society (SAICSIT), 1992)
    In our desire for technical excellence, an appreciation of the human factors of computing is often overlooked. This paper proposes that the social and ethical implications of computers need to be understood by computer ...
  • A new algorithm for finding an upper bound of the genus of a graph 
    Carson, DI; Oellermann, OR (South African Computer Society (SAICSIT), 1992)
    In this paper we discuss the problem of finding an upper bound on the genus of a graph. This problem has applications to circuit layouts. An electronic circuit may be modelled by a graph. By punching holes into the circuit ...
  • Selection criteria for first year Computer Science students 
    Calitz, AP; De Kock, G de V; Venter, DJL (South African Computer Society (SAICSIT), 1992)
    The evaluation of selection criteria for the admission of first year Computer Science students has been an ongoing project at the University of Port Elizabeth since 1984. Various selection criteria and methods, for example ...

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