Author:Abdul Gaffar, MY; Nel, Willem AJ; Naicker, K; Steyn, J; Alanazi, T; Alzamil, ADate:Apr 2011This paper describes the design and working principles of an experimental multimode radar with a stepped-frequency Synthetic Range Profiling (SRP) and Inverse Synthetic Aperture Radar (ISAR) capability for the purpose of operator-based ...Read more
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: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: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: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: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: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: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:Meyer, I; Ford, Merryl; Marais, Mario A; Dlamini, Sifiso BDate:Jun 2017Many ICT4E projects fail once the implementation team withdraws. Although there are multiple reasons for this, the problem often lies with integration of the project into the day-today institutional arrangements of the education system. This ...Read more
Author:Godfrey, Linda K; Oelofse, Suzanna HHDate:Sep 2008Understanding the waste service delivery challenges facing municipalities and unravelling their inter-relationships can be a daunting challenge. Municipalities in South Africa are known to face challenges such as insufficient budget, capacity ...Read more
Author:Klein, Peter; Potgieter, M; Ferreira, Bianca ADate:Aug 2021Dynamic thermo-fluid models of fire-tube steam boilers can be used to optimise the design and operation of equipment, resulting in possible energy and emissions savings. This work presents the development of a dynamic boiler model of a 4-pass ...Read more
Author:Jamison, Kevin ADate:Oct 2023Military and some civilian aircraft need to carry stores to perform their mission. There is a huge diversity of carriage aircraft and types of stores ranging from missiles, drop tanks, space launchers, and rescue equipment. Adding stores to ...Read more
Author:Smit, AG; Anderson, FDate:Aug 2003This paper the considers the question whether the transformation in the South African Defence Research Institutes (DERI's) during the 1990's rendered their use of the formal Systems Engineering (SE) processes inappropriate and unaffordable.The ...Read more
Author:Lemberger, ID; Erasmus, Louwrence DDate:Jul 2014The National Planning Commission’s National Development Plan: Vision for 2030 (NDP) aims to promote economic equality by focussing on innovation within key sectors of the economy. It has been noted that systems engineering has the ability to ...Read more
Author:Snyman-van der Walt, Luanita; Schreiner, Gregory O; Lochner, Paul ADate:Dec 2022Those mandating, commissioning and practising Impact Assessment (IA) have been aware for some time that systems thinking tools need to be better integrated into assessment- and decision-making. The research community has been especially vocal ...Read more
Author:Du Plessis, JJL; Bryden, DJDate:Jan 1997In response to the need for enhanced precautionary measures to safeguard mine workers in collieries from the consequences of methane ignitions in a heading, the coal mining industry has expressed the desire for the development and testing of ...Read more