Browsing by Author "Mostert, F. J."

Now showing 1 - 3 of 3
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    Importance of external environmental labour-related risk factors for financial investment decision-making
    (AOSIS, 2002) Mostert, J. H.; Steel, S. J.; Mostert, F. J.
    External environmental labour-related risk factors influence the relationship between management and the work force of an enterprise. It is therefore of prime importance to consider these labour-related risk actors in order to be able to take a comprehensive financial investment decision. The risk factors concerned come from the political, economic, social and technological environments. The views of the participating investment practitioners (who are active in the long-term insurance industry) regarding these aspects are analysed against the background of relevant literature. The responses with reference to these labour-related risks in manual and knowledge worker enterprises are presented simultaneously and significant similarities and differences are highlighted.
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    Investigation on the influence of the initial RDX crystal size on the performance of shaped charge warheads
    (KeAi Communications, 2019) Majiet, F.; Mostert, F. J.
    Copper lined wave shaped shaped charges of particular design and liner metallurgy were used to investigate the effect of explosive crystal size on the resultant shaped charge jet parameters. Composition A3 with RDX of three different average crystal sizes, i.e. 30 μm, 100 μm and 300 μm were used in the investigation. All other parameters in the charge were kept constant and in particular, care was given to obtain consistent dimensional quality and liner microstructure, in order to prohibit the variation of other parameters. Specific flash-X-ray diagnostics were used in field tests to obtain the jet parameters from multiple firings of similar charges. It is found that the varying crystal size of the RDX has a marginal influence in the total jet length of the jets. However, it is also found that there is less variation between firings in the jet parameters for jets from the charges loaded with the crystal size of 100 μm.
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    Portfolio management practices of investment practitioners active in the long-term insurance industry
    (AOSIS, 2001) Mostert, J. H.; Steel, S. J.; Mostert, F. J.
    In the long-term insurance industry, sound financial investment decisions depend largely on the portfolio management practices of the investment practitioners concerned. The ability of the investment practitioners to make well-informed decisions, as well as the strategies and policies underlying portfolio management practices, are the main issues of this research. Important correlations amongst various aspects of the financial investment decisionmaking process, as well as their association with the general information pertaining to the long-term insurers (which were disclosed during the empirical study), emerge in the closing section of this paper. The conclusions should be of prime interest to long-term insurers as well as investment practitioners who are working in that industry.