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- ItemMobiele toerusting wat die suksesvolle vervoer van intermodale standaardhouers per spoor ondersteun(Suid-Afrikaanse Akademie vir Wetenskap en Kuns, 2021) Pienaar, Wessel J.Hierdie artikel bied ’n oorsig van die tegniese en funksionele eienskappe van mobiele toerusting wat die suksesvolle vervoer van intermodale standaardhouers per spoor ondersteun. Die toerusting ter sprake is goederetreine, houerspoortrokke, intermodale standaardhouers en mobiele houerhanteringstoerusting. Goederetreine word verdeel in trokvragtreine en eenheidstreine, en die gepastheid van elke treinsoort vir die grootskaalse vervoer van intermodale standaardhouers word aangetoon. Daarna word die twee soorte doelgeboude houerspoortrokke toegelig. Die tien soorte intermodale standaardhouers wat beskikbaar is om goedere in te vervoer, word vervolgens behandel. Ten slotte word die funksies en eienskappe bespreek van hedendaagse mobiele hanteringstoerusting wat doeltreffend aan die houerhanteringsvereistes van moderne intermodale vervoerbedrywighede voldoen.
- ItemA performance measurement system for integrated production and maintenance planning(Elsevier, 2020) Schreiber, M.; Schutte, C. S. L.; Braunreuther, S.; Reinhart, G.The increasing amount of production resources to be maintained and efficiency requirements are forcing manufacturing companies to improve production and maintenance effectiveness by a mutual consideration of both functions in an integrated planning process. However, less attention is paid to monitor the performance of manufacturing systems based on key performance indicators to identify the need for measures and adapting plans. Performance Measurement Systems (PMS) are applied to accomplish this task. Therefore, this paper presents an evaluation of existing PMS’s for production and maintenance planning. A new PMS that considers strategic and operational views is presented and validated by an industrial case study.
- ItemA network maturity mapping tool for demand-driven supply chain management : a case for the public healthcare sector(MDPI, 2021-10-29) Bvuchete, Munyaradzi; Grobbelaar, Sara Saartjie; Van Eeden, JoubertThe healthcare supply chain is a complex adaptive ecosystem that facilitates the delivery of health products to the end patient in a cost-effective way. However, low forecast accuracy and high demand volatility in healthcare supply chains have resulted in an increase in stockouts, operational inefficiencies, poor health outcomes, and a significant increase in supply chain costs. To cope with these challenges, organisations are trying to adopt demand-driven supply chain management (DDSCM) operating practices which have been established in other sectors such as the telecommunications, fruit, and flower industries. However, previous studies have not considered these practices in the healthcare industry, and hence no methodologies exist that support the implementation of these practices in this context. Moreover, current studies present cases where the focus has been on improving and expanding individual organisational performance, but no supply chain network-level studies exist on the healthcare industry. Therefore, this paper provides a network-level analysis when addressing DDSCM in the healthcare industry. A grounded theory-based approach coupled with a conceptual framework analysis process was used to leverage a systematized literature review methodology with the development of a network maturity mapping tool for DDSCM which was validated in the public healthcare sector.
- ItemEvaluating the energy potential of solar PV located on mining properties in the Northern Cape Province of South Africa(MDPI, 2020-07-21) Van der Merwe, Waldo; Brent, Alan C.ENGLISH ABSTRACT: The lauded Renewable Energy Independent Power Producer Procurement Program (REIPPPP) has achieved much in stimulating private sector investment in the renewable energy market in South Africa. Yet, 95% of electricity generated is still from a single source, the state-owned utility Eskom. This paper set out to explore the policy sphere governing electricity generation and identifying possible avenues that can contribute to a more vibrant solar energy market in the most solar abundant province of South Africa, the Northern Cape Province. Licensed mines were identified as low hanging fruit due to a large policy overlap and leeway within existing mining policy. A solar audit of these areas was performed, based on accepted multi-criteria decision analysis techniques, and found that a potential 369 TWh to 679 TWh per annum can be generated, exceeding South Africa’s current electricity usage.
- ItemWater and CSP - linking CSP water demand models and national hydrology data to sustainably manage CSP development and water resources in arid regions(MDPI, 2020-04-21) Duvenhage, D. Frank; Brent, Alan C.; Stafford, William H. L.; Grobbelaar, S.ENGLISH ABSTRACT: A systematic approach to evaluate Concentrating Solar Power (CSP) plant fleet deployment and sustainable water resource use in arid regions is presented. An overview is given of previous work carried out. Once CSP development scenarios, suitable areas for development, and the water demand from CSP operations were evaluated, appropriate spatiotemporal CSP performance models were developed. The resulting consumptive patterns and the impact of variable resource availability on CSP plant operation are analysed. This evaluation considered the whole of South Africa, with focus on the areas identified as suitable for CSP, in order to study the impact on local water resources. It was found that the hydrological limitations imposed by variable water resources on CSP development are severe. The national annual theoretical net generation potential of wet-cooled Parabolic Trough decreased from 11,277 to 120 TWh, and that of wet-cooled Central Receiver decreased from 12,003 to 170 TWh. Dry cooled versions also experience severe limitations, but to a lesser extent—the national annual theoretical net generation potential of Parabolic Trough decreased from 11,038 to 512 TWh, and that of Central Receiver decreased from 11,824 to 566 TWh. Accordingly, policy guidelines are suggested for sustainable CSP development and water resource management within the context of current South African water use regulation.