Author:Badenhorst, J; Davel, MHDate:Nov 2015We experiment with a new method to create synthetic models of rare and unseen triphones in order to supplement limited automatic speech recognition (ASR) training data. A trajectory model is used to characterise seen transitions at the spectral ...Read more
Author:Wright, Jarrad G; Van Coller, JohnDate:Nov 2018The requirement for increased investment in electrical energy infrastructure in the Southern African Power Pool (SAPP) region is contextualised. Background on the SAPP is provided for reference. A brief assessment of historical capacity ...Read more
Author:Dludla, Angeline G; Bembe, MJ; Byambaakhuu, B; Abdulai, M-S; Jeung Rho, JDate:Sep 2013The recent growth of ubiquitous computing brings to the networking discipline new classes of home, campus, and mobile networks. This would enable education service providers to provide services to learners anywhere, anytime and not only through ...Read more
Author:Sharma, Ameeth; Sivakumar, V; Bollig, C; Van Der Westhuizen, C; Moema, DDate:Nov 2009South Africa’s first mobile LIDAR (LIght Detection And Ranging) system is being developed at the National Laser Centre (NLC) of the Council for Scientific and Industrial Research (CSIR) in Pretoria (25°45’S; 28°17’E). The system is designed ...Read more
Author:Oosthuizen, Rudolph; Pretorius, LDate:Oct 2015Introducing a new technology into a complex sociotechnical system will have planned as well as unplanned impact. Dynamic interaction between the technology, people, and environment may result in counter intuitive systemic effects. Modelling ...Read more
Author:Stafford, William HL; Simelane, T; Kwagga, M; Mutanga, Shingirirai SDate:2018Biofuels are renewable energy sources that are alternatives to the current fossil fuels which dominate energy supply systems. Since energy is a domestic necessity and also a factor of production (enabling a variety of services such as ...Read more
Author:Oosthuizen, Rudolph; Pretorius, LDate:Nov 2015One of the requirements for effective Command and Control is good situation awareness. As situation awareness is a complex phenomenon due to social and cognitive interaction factors, its modelling, prediction and calculation can be difficult. ...Read more
Author:Oosthuizen, Rudolph; Molekoa, Malinkeng M; Mouton, FrancoisDate:Nov 2018Cyber-attacks pose a major modern era threat to organisations that use networks (e.g., corporate networks and the Internet) to facilitate and improve business processes. The complexity of Internet vulnerability and increasing value of information ...Read more
Author:Chown, GA; Wright, Jarrad G; Van Heerden, Renier P; Coker, MDate:Nov 2017This paper explores the relationship between system inertia and Rate of Change of Frequency (RoCoF) in a changing world with increased penetration of non-synchronous renewable energy power generation (wind and solar PV). Research performed ...Read more
Author:Smith, CJ; Oosthuizen, Rudolph; Harris, H; Venter, JP; Combrink, C; Roodt, JHSDate:Jun 2012Recently, defence capability development practices have moved towards approaches that include capability based planning and traditional systems engineering methodologies. Internationally, defence force capability development efforts struggle ...Read more
Author:Koen, Hildegarde S; Roodt, H; De Villiers, Johan PDate:Oct 2017The initial goal of this study was to develop a predictive model that could serve as a pre-emptive method for curbing rhino poaching. During the development of the predictive model it became evident that only the tip of the iceberg, so to ...Read more
Author:Mauwa, H; Bagula, A; Zennaro, M; Pietrosemoli, E; Lysko, Albert A; Brown, TXDate:Nov 2016Access to the television white space by white space devices comes with a major technical challenge: white space devices can potentially interfere with existing television signals. Two methods have been suggested in the literature to help white ...Read more
Author:Van Der Merwe, A; Kotzé, PaulaDate:Feb 2009Process models are used in different application domains to capture knowledge on the process flow. Process reference models (PRM) are used to capture reusable process models, which should simplify the identification process of process models ...Read more
Author:Grobler, TL; Ackermann, ER; Olivier, JC; Van Zyl, AJDate:Sep 2011Systematic Luby Transform (fountain) codes are investigated as a possible incremental redundancy scheme for EDGE. The convolutional incremental redundancy scheme currently used by EDGE is replaced by the fountain approach. The results of the ...Read more
Author:Mwim, EN; Mtsweni, Jabu SDate:Jul 2022There is a need to shift from a purely technological approach in addressing cybersecurity threats to a more human inclusive method. As a result, cybersecurity culture is gaining momentum in research as an approach in addressing cybersecurity ...Read more
Author:Roopchund, R; Andrew, Jerome E; Sithole, Bruce BDate:Jan 2023The water treatment industry needs customized solutions. Despite the advancement of water treatment technologies, proposed designs must pass pilot trials before industrial implementation. Technology piloting is costly and time-consuming. Water ...Read more
Author:Gumbo, AD; Kapangaziwiri, Evison; Mathivha, FIDate:May 2022Developing nations will be worst hit by the impacts of climate change because limited resources hinder the spatial reach of climate studies, effort, and subsequent implementation to help with the improvement of livelihoods. Therefore, finding ...Read more
Author:Gonçalves, Duarte P; Serfontein, Christian JDate:Nov 2022This article examines current and emerging threats to infrastructure as South Africa transitions from the National Key Points Act (NKPA), Act No. 102 of 1980 to the Critical Infrastructure Protection Act (CIPA), Act No. 8 of 2019. The aim is ...Read more
Author:Dabrowski, JJ; Beyers, C; De Villiers, Johan PDate:Nov 2016For decades, the literature on banking crisis early-warning systems has been dominated by two methods, namely, the signal extraction and the logit model methods. However, these methods, do not model the dynamics of the systemic banking system. ...Read morecb