Quaestiones Informaticae (QI): Recent submissions

  • Concurrency: An Easier Way to Program 
    Mueller, C.S.M. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    Why concurrency in itself should be seen as a method of programming, is discussed. Current approaches to concurrent programming are evaluated in terms of e~e qt programming. The properties required to decompose the ...
  • A Context Sensitive Metalanguage for Intelligent Editors 
    Kaplan, S.M. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    The notion of and mot1vat1on for intelligent editor systems 1s introduced, spec1f1cally a language independent intelligent editor called "PASTOR" We also introduce and discuss the metalanguage used in the editor for grammar ...
  • Documenting a Database System with a Database 
    Hunter, D.A. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    The South African Data Centre for Oceanography (SADCO) has implemented a multi d1sc1plinary oceanographic database using OMS 170, a relational database management system Using a high level query language sc1ent1sts from ...
  • Very High Speed Graphics Work-Station 
    Jablonski, J.; Dijkman, J.H. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    The design of a high speed graphics workstation 1s presented A spec1f1caly designed Graphics System Interface com bines standard computer peripherals to produce a soph1st1cated man machine workstation A review 1s given ...
  • 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 ...
  • Quo Vadis, Computer Science? 
    MacGregor, K.J. (Computer Society of South Africa (on behalf of SAICSIT), 1985)
    The discipline of Computer Science has been established for almost twenty years. In SOUTH AFRICA, Computer Science Departments have been in existence for fifteen years, and producing graduates for twelve, however, the ...
  • High-level Debugging Systems for Pascal: Interpreter versus Compiler 
    Hirsch, Michael; Schach, Stephen R.; Van Biljon, Willem R. (Computer Society of South Africa (on behalf of SAICSIT), 1985)
    Two approaches to high-level debugging systems for Pascal are compared, namely the use of a debugging precompiler as against a debugging interpreter. A description is given of a high-level Pascal debugging interpreter ...
  • Specification and Performance Prediction of Fourth Generation Language Run Units 
    Wulf, S. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    Fourth generation languages offer substantial productivity benefits to data processing departments. Major problems associated with their use include the inability of conventional project management systems to control ...
  • Software Configuration Management A practical approach 
    Du Preez, L.S. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    A bnef description of software conf1gurat1on management principles 1s given, followed by a d1scuss1on on the ap pl1cat1on of these principles in a spec1f1c installation
  • Syllabi for Computer Science as a Scientific Discipline 
    Postma, Stef W. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    The paper is concerned with computer science as a science and the training required by its scientific practitioners-tobe. The background and objectives for a curriculum design are briefly sketched, and a taxonomy is given ...
  • An Adaptive Response Algorithm 
    Pirow, Peter (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    In five years of watching students operate terminals I have observed that the response time of the terminal has much to do with the comfort of the user. I have also observed this phenomenon in the business environment. ...
  • 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 ...
  • 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 ...
  • On a Generalisation of Cayley Diagrams 
    Labuschagne, W.A.; Van Rooyen, H.O. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    A technique for partially representing binary group operations by sets of binary relations was devised by Cayley. This technique can be generalised to permit the representation of arbitrary sets of n-ary relations {n ~ ...
  • Software Configuration Management - A practical approach 
    Du Preez, L.S. (Computer Society of South Africa (on behalf of SAICSIT), 1984)
    A brief description of software configuration management principles is given, followed by a discussion on the application of these principles in a specific installation.
  • 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 ...
  • 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 ...
  • 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 ...
  • An Analytical Model of a Mixed-Workload MVS Computer System 
    Mann, R.J. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    A basic description of the facilities of the computer modelling package, AUTO-CONFIGURATER, is presented together with detailed procedures to calculate the required input parameters from monitor statistics. Techniques to ...
  • 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 ...

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