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Browsing South African Computer Journal (SACJ) by Type "Article"

Browsing South African Computer Journal (SACJ) by Type "Article"

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  • A 3-dimensional security classification for information 
    Smuts, W (South African Computer Society (SAICSIT), 1999)
    Most existing information security classification schemes use a 1-dimensional scale such as [top secret, secret, employee confidential, company confidential, restricted]. These classification schemes do not differentiate ...
  • The abstraction-first approach to encouraging reuse 
    Machanick, Philip (South African Computer Society (SAICSIT), 1997)
    Experience in industry suggests that reuse does not happen without retraining, despite the fact that many experienced software engineers accept that reuse ought to be more efficient than coding from scratch. A possible ...
  • Accessing subroutine libraries on a network 
    Greenwood, PH; Nash, PE (South African Computer Society (SAICSIT), 1992)
    The purchase cost of specialized subroutine libraries can be high, especially if they need to be duplicated on several hosts on a local area network. A remote library access system has been designed, and a prototype built, ...
  • Active learning: Issues and challenges for information systems and technology 
    Quilling, RD; Erwin, GJ; Petkova, O (South African Computer Society (SAICSIT), 1999)
    Changes following South Africa's first democratic election when Nelson Mandela was elected President, have stimulated reviews of many economic, political and social structures including those in national education. One of ...
  • 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, ...
  • An AI search algorithm to obtain the shortest simplex path 
    Scott, TG; Hattingh, J.M.; Steyn, T (South African Computer Society (SAICSIT), 1996)
    The simplex method is one way of solving a linear programming problem (LP-problem). An A* search algorithm based on a certain evaluation function has been developed to obtain the shortest path to an optimal solution within ...
  • Analysing routing strategies in sporadic networks 
    Melville, SW (South African Institute of Computer Scientists and Information Technologists, 1992)
    Communications networks with sporadically available links pose particular problems in terms of delay analysis. This paper presents an approach to determining the effectiveness of various routing strategies when applied to ...
  • 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 ...
  • Animating neural network training 
    van der Poel, E; Cloete, I (South African Computer Society (SAICSIT), 1992)
    In Artificial Neural Network (ANN) simulation it is usually necessary to examine the behaviour of the ANN and detect problems if they occur. However, due to the large volume and high dimensionality of data generated during ...
  • An application of a framework for evaluation of the factors affecting software development productivity in the context of a particular organisational environment 
    Petkova, O; Roode, JD (South African Computer Society (SAICSIT), 1999)
    The goal of this paper is to present the practical implementation of a novel framework for evaluation of the factors affect­ing software development productivity, combining elements from several systems approaches and ...
  • Application-oriented program semantics 
    McIver, AK; Morgan, C; Sanders, JW (South African Computer Society (SAICSIT), 1997)
    This paper abridges lecture notes from WOFACS 96. It provides semantic models for a variety of programming and development formalisms, showing how different models for the same formalism are related by Galois connections. ...
  • Applied Lambda calculus. Using a type theory based proof assistant 
    Pretorius, L (South African Computer Society (SAICSIT), 1998)
    We introduce a number of typed lambda calculi, show how type theory may be used as basis for a proof assistant, and illustrate this with the Coq proof assistant.
  • Applying software engineering methods to instructional systems development 
    Kotze, P; De Villiers, R (South African Computer Society (SAICSIT), 1997)
    The research reported in this paper aims to integrate software engineering approaches with instructional factors in the requirements analysis, design and production phases of instructional software development. The integration ...
  • An approach for the standardisation of policies for selection of computer hardware and software 
    Petkov, D (South African Computer Society (SAICSIT), 1996)
    This paper suggests an approach for the selection of microcomputer equipment in a decentralised environment. It is based on a modification of the procedure of the Analytic Hierarchy Process (AHP) by T. Saaty. The structuring ...
  • Approaches to video transmission over GSM networks 
    Du, B; Maeder, A (South African Computer Society (SAICSIT), 1999)
    Real-time video delivery adds an aspect of reality when used in conjunction with other computer and human communi­cations facilities (eg in videophone or videoconferencing applications). However, the complex and time-critical ...
  • 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 ...
  • Assessing the usability of computer systems 
    Parker-Nance, TC; Warren, PR (South African Computer Society (SAICSIT), 1993)
    Usability problems with computer systems can be divided into three broad categories: problems due to the socio/political environment, problems due to the usefulness of systems, and problems due to the accessibility of ...
  • ATM transmission convergence implementations: SONET/SDH vs Cell-based 
    De Jager, N; Roos, J (South African Computer Society (SAICSIT), 1996)
    This article discusses various issues around the Transmission Convergence (TC) sublayer in the physical layer of ATM. A brief introduction is given to the layered approach and functionality of the ATM physical layer. This ...
  • 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 ...
  • Automatically linking words and concepts in an Afrikaans dictionary 
    Theron, PZ; Cloete, I (South African Computer Society (SAICSIT), 1992)
    The problem of automatic acquisition of lexical-semantic relations for Afrikaans nouns from a dictionary is addressed. The acquisition process is improved over previous approaches by implementing both typographic constraints ...

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