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Faculty of Engineering and Built Environment

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    The use of productivity improvement tools at a mineral processing plant
    (IEOM Society International, 2023-03) Ramdass, Kemlall R; Makwanda, Nobert; Mncwango, Bongumenzi T
    This study investigates the applicability and effectiveness of continuous improvement tools in mineral processing plants. The gold mining sector in South Africa in 2021 contributed about 8.2% towards the GDP, which is a lower percentage compared to the 21% of the 1980s. Mineral processing is the 2nd phase of mineral extraction and processing activities (from the 1st stage, the ore extraction process). As such, productivity improvement is important as it also improves the output the minerals extracted. It is essential that mining houses continuously looks at ways to improve productivity. Due to the nature of the process, it is also important to note that any change or improvement on productivity should be considered holistically and be efficient, as increases are usually in the range of 5 to 10%. The research looked at various productivity improvement tools including lean, six sigma, kaizen, and applicability of these tools. The research that has already been done on productivity improvement were also investigated, with the aim of establishing what has not been covered, which revealed that productivity in the mineral processing industry has had less research. Improvement tools applicable to the gold processing plants were then investigated and recommendations made on implementation of such
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    Availability and operability in optical transport network architectures
    (Solid State Technology, 2020-10-12) Nleya, Bakhe
    A typical optical transport network interconnects multitudes of offices. With the advent of the Internet of Things (IoT) networking approach, it has become necessary for such transport structures to be flexible enough to accommodate heterogeneous communication services that generate escalating traffic loads every time. It is also key not only to accommodating continuously escalating traffic levels, but also to maintaining a consistent Quality of Service, operability as well availability. This can only be achieved through the provisioning of effective and dynamic network control. In this paper, we explore the various operational issues such as incompatibilities in terms of physical layer transmission requirements and other control and management challenges emerging in present and future/ (envisaged) optical transport networks.
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    Availability and operability in optical transport network architectures
    (IEEE, 2020-08) Gomba, Masimba; Nleya, Bakhe; Chidzonga, Richard F.
    A typical optical transport network interconnects multitudes of offices. With the advent of the Internet of Things (IoT) networking approach, it has become necessary for such transport structures to be flexible enough to accommodate heterogeneous communication services that generate escalating traffic loads every time. It is also key not only to accommodating continuously escalating traffic levels, but also to maintain a consistent Quality of Service, operability as well availability. This can only be achieved through the provisioning of effective and dynamic network control. In this paper, we explore the various operational issues such as incompatibilities in terms of physical layer transmission requirements and other control and management challenges emerging in present and future/ (envisaged) optical transport networks.