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Browsing Quaestiones Informaticae (QI) by Title

Browsing Quaestiones Informaticae (QI) by Title

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  • The Impact of Microcomputers in Computer Science 
    Danhof, Kenneth J.; Smith, Carol L. (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    This paper considers the emerging role of the microcomputer laboratory in a computer science department The components for a particular laboratory are suggested. These include the microcomputers themselves, supporting ...
  • An Improved Implementation of Grimbleby's Algorithm 
    Schach, Stephen R. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    Details are given of an implementation of Grimbleby's algorithm for the common spanning tree problem with running times up to 50% less than for the original implementation. An explanation is given as to why implementations ...
  • In praise of solid state discs 
    Ridler, P.F. (Computer Society of South Africa (on behalf of SAICSIT), 1986)
    Various ways of using random access memory to emulate a magnetic disc storage system are described and the advantages and disadvantages are enumerated. An algorithm for making use of a solid state disc is given which avoids ...
  • 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 ...
  • Laws and techniques of information systems 
    Mende, J. (Computer Society of South Africa (on behalf of SAICSIT), 1986)
    Research has a utilitarian role of providing the knowledge needed by the designers of mankind's artefacts. In this context four distinct categories of knowledge are identifiable. 1. Laws of Nature describe inherent ...
  • 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 ...
  • Local area networks in perspective 
    Kritzinger, Pieter S. (Computer Society of South Africa (on behalf of SAICSIT), 1987)
    Current scientific and trade literature are flooded with information about local area networks. Details about physical media and their properties, versions of media access methods confusingly called protocols, variations ...
  • Low-cost artificial intelligence research tools 
    Machanick, Philip (Computer Society of South Africa (on behalf of SAICSIT), 1986)
    There has been a proliferation of low-cost AI tools. Consideration is given as to how significant research may be conducted using these tools, in the light of experience of developing Al tools on large, expensive machines. ...
  • The Management of Operating System State Data 
    Turton, Trevor (Computer Society of South Africa (on behalf of SAICSIT), 1979)
    A new approach is proposed for the management of operating system state data. Relational database concepts are suggested for the analysis and organization of this data, and a common central service routine is described ...
  • Managing and Documenting 10-20 Man Year Projects 
    Visser, P. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    This paper presents a summary of tutorial material on accepted management techniques and philosophies as applied to the development of large software systems, based upon the documentation for such systems.
  • The Memory Organization of Future Large Processors 
    Stein, David M. (Computer Society of South Africa (on behalf of SAICSIT), 1980)
    In this paper some specifics and some generalities on the subject of memory organization for future large processors are discussed. We briefly review the current hierarchy and discuss technological and economic changes ...
  • Micro-Code Implementation of Language Interpreters 
    Roets, P. P. (Computer Society of South Africa (on behalf of SAICSIT), 1982)
    An evaluation is made of the improvement of language interpreters by coding recurring sequences of instructions in micro-code. The results of an experiment with PASCAL indicate that the increase in speed expected may not ...
  • Migrations: A Microcomputer-Based Generalized Information Retrieval System 
    Pino, Jose A. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    This paper describes the design of MIGRATIONS, a software system under development at the University of Chile, whose purpose is to store, manage and retrieve unformatted text information. Among the most important design ...
  • A model for fault-tolerant computer systems 
    Goosen, H.A.; Hoogendoorn, C.H.; Goosen (Computer Society of South Africa (on behalf of SAICSIT), 1987)
    Reliability is an important consideration in the design of computer systems. This is a result of the increasing complexity of computer systems and of the greater reliance placed on their continuous and correct operation. ...
  • A model to evaluate the success of information centres in organizations 
    Bruwer, P.J.S.; Groenewald, J.J. (Computer Society of South Africa (on behalf of SAICSIT), 1987)
    The objective of this research report was to investigate some South African organizations who have been operating information centres (IC's) successfully for more than two years. As the success of the IC is strongly · ...
  • Modeller : a DSS for experimental study of Human-computer interaction 
    Finnie, G.R. (Computer Society of South Africa (on behalf of SAICSIT), 1986)
    This paper describes the structure of a simple nonprocedural financial modelling system designed to collect a variety of statistics on aspects of novice interaction with decision support systems. Some findings on the use ...
  • Modelling Blocking on Admission of Tasks to Computer Systems 
    Wulf, S. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    The need for modelling techniques to allow blocking of tasks prior to admission to the computer system in queueing network models is described. A detailed algorithm which presents a technique to enforce blocking by priority ...
  • Modelling distributed database concurrency control overheads 
    Rennhackkamp, M.H.; Von Solms, S.H. (Computer Society of South Africa (on behalf of SAICSIT), 1988)
    Numerous concurrency control methods have been proposed for distributed databases. Various crz·teria are used to compare these methods. The comparisons range from qualitative overviews through quantitative analyses to ...
  • Models to evaluate the state of computer Facilities at South African universities 
    Bruwer, P.J.S.; Hattingh, J.M. (Computer Society of South Africa (on behalf of SAICSIT), 1986)
    Computer technology has grown exponentially in the course of the past decade in terms of sophistication - not only with regard to hardware and networks, but also with regard to mainframe and micro-computer systems. ...
  • Nebulas as Structural Data Models 
    Van Rooyen, H.O.; Weiermans, D.J. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    Nebula modell_ing is_ a generalised structural modelling technique which applies to any finite set of objects (entities) and n-ary relat1onsh1ps (n ~2). A nebula model can be presented in either diagrammatic or tabular ...

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