School of Computing: Recent submissions

  • Die Operasionele Enkelbedienermodel 
    Van Niekerk, J.C. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    The operational approach to the analysis of the single server model is discusses. Firstly Buzen's operational equivalent to the stochastic birth/death Markov model is presented, whereafter generalisations of the model are ...
  • Data Structure Traces 
    Schach, Stephen R. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    Three levels of traces for data structures (as opposed to simple variables) are defined. A machine-code core dump is essentially a low level trace. A high level trace reflects the high level language in which the data ...
  • Die Definisie en lmplementasie van die taal Scrap 
    Van Rooyen, Martha H. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    SCRAP is a high-level language that provides facilities for systems progrc~ff)ming, but can equally well be used for applications programming. The prominent features of the language are a well-defined syntax, a modular ...
  • Case-Grammar Representation of Programming Languages 
    Popelas, Judy Mallino; Calingaert, Peter (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    The correction of errors in programs can be based on an analysis, that subordinates syntactic relationships to functional relationships among elements of a program. For this purpose, case grammars, originally developed ...
  • Detecting Errors in Computer Programs 
    Hetzel, Bill; Calingaert, Peter (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    A controlled experiment was designed and conducted to compare three methods for detecting errors in computer programs: disciplined, structured reading; specification or black-box testing; and a refined form of typical ...
  • Network partitions in distributed databases 
    Viktor, HL; Rennhackkamp, MH (South African Computer Society (SAICSIT), 1992)
    The technology of distributed databases is based on two other technologies which have developed a solid foundation: computer networks and centralized databases. A distributed database designer should therefore address ...
  • 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 ...
  • Mechanising execution sequence semantics in HOL 
    Tredoux, G (South African Computer Society (SAICSIT), 1992)
    The mechanization in Higher Order Logic of a general- purpose operational semantics for programming languages is described. The mechanization allows the sound derivation of Dijkstra-style axiomatic semantics. A small ...
  • 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 ...
  • Semantic constructs for a persistent programming language 
    Sparg, S.B.; Berman, Sonia (South African Computer Society (SAICSIT), 1992)
    Existing persistent languages cannot express the structure and semantics of the data they work on precisely and simply. As a result programs are more difficult to write and the integrity of the data is compromised. This ...
  • A general building block for distributed system management 
    Putter, P; Roos, JD (South African Computer Society (SAICSIT), 1992)
    This paper proposes a general building block for distributed systems. This building block is referred to as a generic distributed system entity (GDE). The purpose of the GDE is to create a generic entity which can be used ...
  • From batch to distributed image processing: remote sensing for mineral exploration 1972-1992 
    Pendock, N (South African Computer Society (SAICSIT), 1992)
    The routine use of satellite remotely sensed imagery for a variety of applications is twenty years old this year. In addition to these digital photographs of the earth's surface, subterranean views are made using gravity, ...
  • HILOG - a higher order logic programming language 
    Paterson-Jones, RA; Wood, PT (South African Computer Society (SAICSIT), 1992)
    HILOG is a new logic programming language with a higher-order syntax allowing the elegant expression of many tasks requiring meta-predicates in Prolog. We are in the process of developing a compiler and programming environment ...
  • Using information systems methodology to design an instructional system 
    O'Donovan, BC (South African Computer Society (SAICSIT), 1992)
    Designers of both computerized information systems and instructional systems are faced with a need to find more effective methods of identifying and supplying the information that the users of these systems require. Both ...
  • A lattice-theoretic model for relational database security 
    Melton, A; Shenoi, S (South African Computer Society (SAICSIT), 1992)
    It is often the case that a major concern with databases is security. In this paper we introduce a new model for database security. The basic idea of this new model is that answers to queries are based on equivalent data ...
  • Managing methods creatively 
    Mcleod, G (South African Computer Society (SAICSIT), 1992)
    Organizations have used systems planning and development methodologies for some time now. Results are mixed, with some reporting substantial benefits, and others abandoning the process without achieving the desired benefits. ...
  • Statenets - an alternative modelling mechanism for performance analysis 
    Lewis, L (South African Computer Society (SAICSIT), 1992)
    Statecharts were developed by Harel to specify complex reactive systems. Statecharts proved to be rich in modelling power and convenience [9] and well suited to mechanical implementation. However, the semantic definition ...
  • The multiserver station with dynamic concurrency constraints 
    Kriel, CF; Krzesinski, AE (South African Computer Society (SAICSIT), 1992)
    This paper defines the the Multiserver Station With Dynamic Concurrency Constraints. The MSDCC station consists of B parallel identical exponential servers. The customers requesting service at the MSDCC station belong to ...
  • Machine translation from African languages to English 
    Kourie, D.G.; van den Heever, WJ; Oosthuizen, GD (South African Computer Society (SAICSIT), 1992)
    This paper describes how a machine translation system, LEXICA, has been used and adapted to translate from African languages to English. Results with Tswana provide comprehensible translations that, although not necessarily ...
  • 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, ...

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