2001 National Research and Development Conference: Recent submissions

  • Optimal multi-splitting of numeric ranges for decision tree induction 
    Lutu, PEN (2001)
    Data mining is the process of extracting informative patterns from data stored in a database or data warehouse. Decision tree induction algorithms, from the area of machine learning are well suited for building classification ...
  • Web site readability and navigation techniques: an empirical study 
    Licker, PS; Anderson, R; Macintosh, C; Van Kets, A (2001)
    This research looks into factors that affect the readability of web sites. For those with low literacy skills, low readability may prove to be an insurmountable barrier to profitable, comfortable website use. Two factors ...
  • Real-time performance of OPC in a feedback system 
    Kew, SJ; Dwolatzky, B (2001)
    "OPC" is an important new specification designed to solve interoperability problems in the process control environment. It is based on Microsoft's Component Object Model (COM). The paper surveys and describes the OPC ...
  • Jiminy: helping users to remember their passwords 
    Renaud, K; Smith, E (2001)
    This paper presents a novel approach to a familiar problem - that of helping users to choose better passwords, and to remember them. User identification and authentication is an essential aspect of our technologically ...
  • A proposal for dynamic access lists for TCP/IP packet filtering 
    Hazelhurst, S (2001)
    The use of IP filtering to improve system security is well established, and although limited in what it can achieve has proved to be efficient and effective. In the design of a security policy there is always a trade-off ...
  • Issues affecting the adoption of data mining in South Africa 
    Hart, ML; Davies, K; Barker-Goldie, E-J; Theron, A (2001)
    This research describes a study into the adoption of data mining (DM) techniques and tools in industry. They are seen by most companies interviewed as strategically important, with key applications varying per sector, but ...
  • Towards a conceptual UML model for tracking a learner's progress in an outcomes-based environment 
    Harmse, R; Thomas, T (2001)
    The arrival of outcomes-based education (OBE) in South African means that we have to change the way in which we assess our learners. Coupled with this change comes a move to larger classes where individual assessment has ...
  • Knowledge management: do we do what we preach? 
    Handzic, M; Van Toorn, C; Parkin, P (2001)
    The aim of the case study reported in this paper was to provide a cultural audit of a university school as a typical knowledge-based organisation. The subjects were 24 academic staff members who participated in the study ...
  • Formal usability testing - informing design 
    Van Greunen, D; Wesson, J (2001)
    The goal of this paper is to discuss the role of usability testing in software development in South Africa. Throughout the software industry software engineers develop user interfaces (Ul) with little or no support from ...
  • A comparison of the interface effect on the use of mobile devices 
    Franken, J; Stander, A; Booley, Z; Isaacs, Z; Rose, R (2001)
    Designers of mobile systems continue to focus on transferring the typical workstation environment as prevalent on the desktop PC to mobile devices. The lack of specific focus on the requirements of the wireless platforms ...
  • Introductory IT at a tertiary level - is ICDL the answer? 
    Dixie, CH; Wesson, JL (2001)
    Research is underway at the University of Port Elizabeth (UPE) to establish a framework for introductory IT courses to match the needs of future graduates of diverse programmes from the Faculties of Arts, Building Sciences, ...
  • Information Systems strategic planning and IS function performance: an empirical study 
    Cohen, JF (2001)
    The validity of managerial activities such as strategic planning have come under increasing scrutiny in recent years. In particular, the validity of information systems strategic planning (ISSP) within South African ...
  • Structured mapping of digital learning systems 
    Cloete, E; Miller, MG (2001)
    In this paper we consider the consequences of e-learning design and implementation on the working processes and on the roles to be fulfilled in the usually cyclic process of course development and exploitation. We analyse ...
  • The effects of avatars on co-presence in a collaborative virtual environment 
    Casanueva, J; Blake, E (2001)
    Presence in Collaborative Virtual Environments (CVEs) can be divided into personal presence and co-presence. Personal presence is having a feeling of "being there" in the CVE oneself. Co-presence is having a feeling that ...
  • Real-time facial animation for virtual characters 
    Burford, DJ; Blake, EH (2001)
    Facial expressions form an important part of human to human communication. In order to exploit the fall potential of computer networks and the Internet for communication and interaction, provision should be made for conveying ...
  • An access control architecture for XML documents in workflow environments 
    Botha, R; Eloff, J (2001)
    The eXtensible Markup Language {XML) are being upheld as having the potential to change the way business is conducted. This will be effected by changing the way in which information is shared. However, with the sharing of ...
  • Computer security: hacking tendencies, criteria and solutions 
    Botha, M; Von Solms, R (2001)
    Computer crime and more particularly computer hacking has become increasingly active in today's business environment. Proof of this statement is a survey completed by the Computer Security Institute and the FBI which ...
  • Combining context provisions with graph grammar rewriting rules - the three-dimensional case 
    Barnard, A; Ehlers, EM (2001)
    In this paper we consider the representation and generation of three-dimensional structures by means of formal descriptive methods. Graph and graph grammar theory present us with a powerful two-dimensional representational ...
  • Finding adjacencies in non-overlapping polygons 
    Adler, J; Christelis, GD; Deneys, JA; Konidaris, GD; Lewis, G; Lipson, AG; Phillips, RL; Scott-Dawkins, DK; Shell, DA; Strydom, BV; Trakman, WM; Van Gool, LD (2001)
    Two polygons are adjacent if they have edges which share a common edge segment. In this paper we consider the problem of finding adjacencies in a set of n non-overlapping polygons. Using the fact that adjacent edges must ...

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