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Browsing School of Computing by Issue Date

Browsing School of Computing by Issue Date

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  • Thirty Years of Information Engines 
    Scarrott, G.G. (Computer Society of South Africa (on behalf of SAICSIT), 1980)
    The era ofinformation engineering was initiated some thirty years' ago by the demonstration of the first stored program electronic computer. At that time there was intense innovative excitement among the pioneers which, ...
  • High-level Programming Language for Interactive Lisp-like Languages 
    Postma, Stef W. (Computer Society of South Africa (on behalf of SAICSIT), 1980)
    The language LISP 1.5 is neither easy to write nor to read. In the McCarthy etal. definitive manual on LISP 1.5 a higher level language, MLISP, is used From the early 1960's various people have proposed higher level ...
  • 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 ...
  • A CSP Description of some Parallel Sorting Algorithms 
    Linck, M. H. (Linck, M.H. (1982) A CSP Description of some Parallel Sorting Algorithms,. Computer Society of South Africa (on behalf of SAICSIT), 1982)
    Hoare's CSP notation is used to describe 3 parallel sorting algorithms. The first algorithm uses n/2 processes working in parallel, the second uses an array of n parallel processes and the third algorithm is a parallel ...
  • The Relative Merits of Two Organisational Behaviour Models for Structuring a Management Information System 
    Pirow, Peter (Computer Society of South Africa (on behalf of SAICSIT), 1982)
    The basic 'model' usually applied to the structure of MIS is that of Anthony. This paper investigates the use of the Paterson model as an alternative. This is approached from the theoretical standpoint, and reference is ...
  • 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 ...
  • An Efficient Implementation of an Algorithm for Min-Max Tree Partitioning 
    Becker, Ronald I; Perl, Yehoshua; Schach, Stephen R. (Computer Society of South Africa (on behalf of SAICSIT), 1982)
    An implementation of an algorithm for finding a min-max partition of a weighted tree T with n vertices into q subtrees by means of k = q-1 cuts is presented. The implementation is shown to have asymptotic complexity ...
  • 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 ...
  • 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 ...
  • QUAESTIONES INFORMATICAE VOL 2 
    Unknown author (SAICSIT, 1982-11-01)
  • 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 ...
  • Evaluating the Performance of Computer-Based Information Systems using a Restricted Linear Regression Model 
    Bruwer, P.J.S. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    Performance evaluation techniques can contribute substantially to the successful management of the information services function in an organization. Unfortunately the design and implementation of computer-based ...
  • 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 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Restructuring of the Conceptual Schema to produce DBMS Schemata 
    Wulf, S. (Computer Society of South Africa (on behalf of SAICSIT), 1983)
    An overall methodology for database design is presented. This includes creation of a data dictionary and relational analysis. An algorithm is presented to create a conceptual schema or logical database design from the set ...

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