2001 National Research and Development Conference: Recent submissions

  • 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 ...
  • JavaCloak - considering the limitations of proxies for facilitating Java runtime specialisation 
    Renaud, K (2001)
    This paper discusses issues pertaining to mechanisms which can be used to change the behaviour of Java classes at runtime. The proxy mechanism will be compared to and contrasted with other standard approaches to this ...
  • Managing the operational implications of Information Systems 
    Potgieter, BC (2001)
    Computer scientists and information technologists are morally obliged to study the social impact of their technologies. They must also consider the results of the non-positivistic · approaches that are generally avoided ...
  • Hierarchical level of detail optimization for constant frame rate rendering of radiosity scenes 
    Nirenstein, S; Blake, E; Winberg, S; Mason, A (2001)
    The predictive hierarchical level of detail optimization algorithm of Mason and Blake is experimentally evaluated in the form of a practical application to hierarchical radiosity. In a novel approach the recursively ...
  • The influence of facilitation in a group decision support systems environment 
    Nepal, T; Petkov, D (2001)
    Organisations today face many issues that are complex and ill structured. The complexity of these issues does not lend themselves to structuring and formulation by quantitative models, or simple intuitive problem solving. ...
  • The use of technology to support group decision-making in South Africa 
    Nash, JM; Gwilt, D; Ludwig, A; Shaw, K (2001)
    This research provides some qualitative insights into the prevalence and use of technologies to support decision-making in South Africa. The paper focuses on two hypotheses: firstly, that decision support technology is not ...
  • Model-based segmentation of CT images 
    Marte, O-C; Marais, P (2001)
    This paper presents preliminary work on the segmentation of Computed Tomography data using a model-based approach. Conventional image processing of CT data is aimed at the production of simple iso-surfaces far surgical ...
  • Ubiquitous computing and cellular handset interfaces - are menus the best way forward? 
    Marsden, G; Jones, M (2001)
    Embedded interactive computer systems, such as those found in cellular handsets, can be hard to use. The combination of small form factor - limited input and output potential - and an increasing feature set, result in ...
  • Further cache and TLB investigation of the RAMpage memory hierarchy 
    Machanick, P; Patel, Z (2001)
    The RAMpage memory hierarchy is an alternative to the traditional division between cache and main memory: main memory is moved up a level and DRAM is used as a paging device. Earlier RAMpage work has shown that the RAMpage ...
  • The case for a multiprocessor on a Die: MoaD 
    Machanick, P (2001)
    Increasingly aggressive pipelining achieves diminishing returns. Simultaneous Multi-threading (SMT) attempts to exploit the fact that functional units are frequently idle. This paper argues the case for keeping the processor ...
  • 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 ...

Search UnisaIR


Browse

My Account