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Browsing Quaestiones Informaticae (QI) by Title

Browsing Quaestiones Informaticae (QI) by Title

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  • A data structure for exchanging geographical information 
    Cooper, A.K. (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    Geographical information consists of non-spatial information (alphanumeric) and spatial information (vector and raster), the relationships between the non-spatial information and the spatial information, as well as ...
  • 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 ...
  • Data Structures for Generalized Network Algorithms 
    Currin, Desmond C. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    Generalized network problems involve the optimization of a flow through a network. In contrast to normal networks, generalized networks include multipliers which alter the flow as it passes through the arcs. This enables ...
  • Database Design: Choice of a Methodology 
    King, M. C. F.; Naude, G.; von Solms, S. H. (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    Aspects are discussed of the pract.Ical applicat.Ion of recent relatlonal theory The relevant defirut.Ions, extracted from vanous papers, have been restated usmg a common notat.Ion An attempt is made to descnbe unambiguously ...
  • Decision tables as a knowledge representation formalism 
    Podevyn, D. (Computer Society of South Africa (on behalf of SAICSIT), 1987)
    A knowledge engineering tool called GESS (General Expert System Shell) is presented which is used for building different types of expert systems. Knowledge representation is based on direct extensions of the idea of decision ...
  • The Design and Microprogrammed Implementation of a Structured Language Machine 
    Finnie, G.R. (Computer Society of South Africa (on behalf of SAICSIT), 1982)
    A computer architecture is described which is suitable for the execution of structured languages (such as Pascal or Algol) at the intermediate language level. The design is heavily stack oriented and consists basically ...
  • The Design Objectives of Quadlisp 
    Postma, Stef W. (Computer Society of South Africa (on behalf of SAICSIT), 1982)
    Quadlisp is a symbol manipulation language for sophisticated users, and it is an improper extension of Lisp 1.5 (in the same sense that Pascal is an improper extension of Algol). Elements from Lisp thus are basic to the ...
  • Design Principles of the Language BPL 
    Williams, M.H. (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    BASIC and Pascal are two rather different programming languages, both of which have proved to be very popular. A new language BPL has been designed as an interactive programming language based on these two languages, ...
  • A detailed look at operating system processes 
    Venter, B.H. (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    An operating system provides, among other things, an operational definition of a process. The concept of a process is one of the fundamental concepts of Computer Science, and the designer of an operating system must strive ...
  • 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 ...
  • Developing an Intelligent Editor for Microcomputers 
    McDermott, T.S. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    A language-independent syntax-directed editor for teaching programming languages on micro-computers is briefly described. The design of the configuring grammar and the lnternal tree-structure to be edited and interpreted ...
  • The development of a syntax checker for LOTOS 
    Van der Vegte, L.J. (Computer Society of South Africa (on behalf of SAICSIT), 1987)
    In this article a brief overview is given of specification techniques in general and in particular, specification techniques used for the specification of communication protocols. This discussion forms the background ...
  • The development of an RJE/X.25 pad: a case study 
    Carey, C.W.; Hattingh, C.; Kourie, D.G.; Van den Heever, R.J.; Verkroost, R.F. (Computer Society of South Africa (on behalf of SAICSIT), 1986)
    This paper describes the practical aspects of a protocol system implementation. The software for a BSC/X.25 Packet Assembler/Disassembler (PAD) was designed, developed and tested. The PAD was designed to support ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Die Toepaslikheid van 'n Analitiese Model by die Keuse van 'n Leerstruktuur vir 'n Teksverwerkingstelsel 
    Penzhorn, A. (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    Die keuse van 'n geskikte leerorganisasie vir 'n rekenaarstelsel is nie altyd eenvoudig en voor die hand liggend nie. In die geval onder bespreking moet 'n geskikte leerorganisasie gekies word vir 'n teksverwerkingstelsel ...
  • Direct Fortran/lDMS Interface (without the use of a DML) on the ICL 1904/2970 Computers, using a geological data base as example. 
    Day, Barbara (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    The Integrated Data Base Management System (IDMS) originally had only a CO~C?L d~ta manipulation language (DML). Recently a DML for FORTRAN on the 2900 series of ICL computers has been produced. This 1s a piece of software ...
  • A Disk Space Management System 
    Cuthbertson, A.J.; Van Niekerk, I.J.; Turton, Trevor (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    This paper describes the research that was undertaken in designing a disk space management system. The system has strong similarities to the management of real storage in a virtual storage environment. These similarities ...
  • Distributed Computer Systems - A Review 
    Peberdy, N.J. (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    The past five years have seen a dramatic changeabout in traditional hardware/software relationships: hardware costs have plummeted, and the size, environmental requirements and reliability of computing elements have altered ...

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