College of Science, Engineering and Technology: Recent submissions

  • 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 ...
  • Orthogonal ray guarding of adjacencies between orthogonal rectangles 
    Sanders, I; Lubinsky, D; Sears, M; Kourie, D (South African Computer Society (SAICSIT), 1999)
    Guarding and covering problems have great importance in Computational Geometry. In this article the notion of' a ray guard, a guard that can only 'see' along a single ray, is introduced. The problem of siting the fewest ...
  • Progressing towards object orientation in South Africa 
    Jansen van Rensburg, M (South African Computer Society (SAICSIT), 1999)
    This article provides a description of the current state of Object Orientation in South African companies. It forms part of an MSc research report, looking at the pitfalls and guidelines in the transition to 00. The problems ...
  • A formal model for object bases 
    Patsouris, PA; Korostenski, M; Kissimov, V (South African Computer Society (SAICSIT), 1999)
    We introduce FMOB: a formal model for Objectbases. The term "Objectbase" represents better the widely used "object­ oriented database". FMOB consists of ( 1) objects (classes and their instances) with extended encapsulation ...
  • Discriminators for authorship attribution 
    Paijmans, H (South African Computer Society (SAICSIT), 1999)
    This paper describes some experiments with the automated attribution of authorship. Lexical cohesion in combination with machine learning techniques are used as a method to compare texts of different authors. A methodology ...
  • Connected digit recognition in Afrikaans using hidden Markov models 
    Nieuwoudt, C; Botha, EC (South African Computer Society (SAICSIT), 1999)
    We implement and evaluate the performance of a state-of-the-art connected digit recognition system for spoken Afrikaans digits. The creation of a database for our purpose is discussed. Results indicate that an efficient ...
  • Electronic performance support systems: appropriate technology for the development of middle management in developing countries 
    Cronje, JC; Baras Baker, SJ (South African Computer Society (SAICSIT), 1999)
    The shortage of suitably qualified middle management in South Africa, and its impact on the potential success of the RDP is well documented. There are various ways of addressing this problem. These methods range from ...
  • A declarative and non-determinist framework for dynamic object-oriented and constraint logic programming 
    Abdulrab, H; Ngomo, M; Drissi-Talbi, A (South African Computer Society (SAICSIT), 1999)
    LOP (Logic, Object, Parallelism) is a system that integrates object-oriented and constraint logic programming. It is entirely designed and implemented, using object-oriented methodology, under the form of hierarchical ...
  • Heuristics for resolution-based set-theoretic proofs 
    Van der Poll, JA; Labuschagne, WA (South African Computer Society (SAICSIT), 1999)
    A formal specification language like Z permits the specifier to construct proofs which corroborate the aptness of the spec­ification. This process may be facilitated by establishing a partnership between the specifier and ...
  • An Interactive Graphical Array Trace 
    Schach, Stephen R. (Computer Society of South Africa (on behalf of SAICSIT), 1982)
    data structure and its computer implementation. However, in the course of debugging a program written in a high-level language, the user is sometimes forced to try to understand the low-level implementation of his data ...
  • Reflections on the nature and future of computer science in Southern Africa 
    Venter, BH (Computer Society of South Africa (on behalf of SAICSIT), 1989)
    Computer Science is a relatively recent scientific discipline. It has seen rapid growth and even more rapid change. Not surprisingly there is constant controversy among computer scientists about the nature of the ...
  • Software design to meet third world requirements: an experimental software engineering approach 
    Machanick, Philip (Computer Society of South Africa (on behalf of SAICSIT), 1989)
    Appropriate technology refers to technology appropriate for use in less developed parts of the world, especially the Third World; this paper raises some problems in adapting a definition of appropriate technology to ...
  • An approach to defining abstractions, refinements and enrichments 
    Kourie, D.G. (Computer Society of South Africa (on behalf of SAICSIT), 1989)
    A proposal for defining abstractions and refinements is given in terms of three-valued logic applied to a domain of discourse consisting of a property and an entity set. Definitions for several related concepts flow ...
  • A "cooperating expert's" framework for business expert system design 
    Finnie, G.R. (Computer Society of South Africa (on behalf of SAICSIT), 1989)
    Expert system development environments based on current language constructs such as rules and frames have been criticised for approaching the task of problem solving from too low a level of abstraction. This paper describes ...
  • The application of scientific method to information systems analysis 
    Atkinson, C.R.; Lay, P.M.Q. (Computer Society of South Africa (on behalf of SAICSIT), 1989)
    17zis paper addresses the challenging question of the rigour of the systems analysis process. First of all it discusses the nature of analysis, concluding that, contradictory to cu"ent opinion, it can best be described ...
  • Die meting van sukses van naampassingsalgoritmes in 'n genealogiese databasis 
    De Kock, G de V (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    Norms to measure the success of surname matching algorithms for use in a South African Genealogical Database are proposed. Surnames in the database can be grouped in equivalence classes. These algorithms are taken from ...
  • Finding a cheap matching 
    Smith, T.H.C. (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    We propose an edge exchange algorithm/or finding a cheaper 1-matchingfrom a given ]-matching as well as a heuristic algorithm/or constructing a relatively cheap ]-matching from the optimal solution of a relaxation of the ...
  • Learning the first step in requirements specification 
    Short, R.M.C. (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    Learning about the domain into which an information system will fit is an essential part of the system development process. In this paper it is argued that the first stage of the development process should be learning ...
  • The parallel conditional 
    Postma, Stef W.; Philips, N.C.K. (S W Postma and N C K Phillips (1988) The parallel conditional. Computer Society of South Africa (on behalf of SAICSIT), 1988)
    The parallel conditional is a new but natural programming language construct. It is particularly suited to evaluation on parallel maclunes and generalizes other well known conditionals.
  • A proposed computer network for researchers 
    McDonald, T (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    In contrast to other countries, South Africa has sadly lacked a computer network for researchers. This paper starts with previous efforts to establish a national network for researchers and gives possible reasons for ...

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