Author:Shatalov, MY; Wallis, JR; Nicolaides, KEDate:Jun 2005A design and implementation of a 1-3 piezocomposite side scan transmit sonar array is considered. The theoretical approach to the array design is based on a new concept of one-dimensional modelling of 1-3 piezocomposite transducers, developed ...Read more
Author:Grobler, Inus; Gitau, MNDate:Nov 2013High density high switching frequency power converter conducted EMC had been analysed, modelling the noise source and noise path, while providing accurate conducted EMC noise levels comparable to accredited noise measurements up to 100 MHz. ...Read more
Author:Oloo, Fiona RA; Molefyane, Basetsana; Rampokanyo, Mpeli JDate:Sep 2020This paper presents the modelling of an off-grid micro-grid situated in a remote rural village in Eastern Cape province in South Africa. The modelling looks at the optimization studies for control dispatch strategies for the integration of ...Read more
Author:Loveday, Philip W; Long, Craig S; Forbes, A; Land, KDate:Mar 2008An intra-cavity adaptive mirror is required to compensate for time-dependent phase aberrations to the laser beam, such as those caused by thermal lensing. A piezoelectric unimorph design can provide a small, low-cost deformable mirror for ...Read more
Author:Tlhabadira, I; Daniyan, IA; Machaka, Ronald; Machio, Christopher N; Masu, L; VanStaden, LRDate:Jun 2019Surface roughness Ra is a parameter normally used to indicate the level of surface irregularities during machining operations. This work aims to model the cutting process, correlate and optimise the critical process parameters using the Taguchi ...Read more
Author:Raji, SA; Popoola, API; Pityana, Sisa L; Popoola, OM; Arthur, Nana KK; Tlotleng, MonnammeDate:Oct 2021Recently, laser additive manufacturing (LAM) technologies are increasingly being applied for producing components with excellent physical and mechanical properties in the aerospace, automotive and energy industries. This work is aimed at ...Read more
Author:Ramatlo, D; Loveday, P; Long, Craig S; Wilke, DDate:Nov 2021A permanently installed Ultrasonic Broken Rail Detection system monitors the Sishen-Saldanha railway line in South Africa. The system detects complete rail breaks at long-range using guided wave ultrasound. For the system to be reliable, its ...Read more
Author:Jahajeeah, NDate:Oct 2005Presentation presented at the RAPDASA conference on the modelling and simulation SSM:The latest state of the art technologyRead more
Author:Naidoo, ShahenDate:Oct 2009The purpose of this paper is to discuss M&S activities that have contributed to the Ground Based Air Defence System (GBADS) programme over the years and to look specifically at the future role of M&S within the Joint Air Defence (JAD) ...Read more
Author:Le Roux, WHDate:Nov 2008With less than 650 days to go until the first kick-off of the 2010 FIFA World Cup South Africa, the safety and security of everyone is paramount. All South African departments, agencies and institutes that are part of the team to ensure a ...Read more
Author:Karsten, AE; Smit, Jacoba EDate:Mar 2012Lasers are used in the minimalistic or noninvasive diagnosis and treatment of skin disorders. Less laser light reaches the deeper skin layers in dark skin types, due to its higher epidermal melanin concentration compared with lighter skin. ...Read more
Author:Fourie, CH; Winkler, H; Roro, Kittessa TDate:Nov 2019This paper seeks to investigate the performance of solar irradiance modelling to ground based data in an urban environment. The ability to accurately model and in turn determine solar irradiance as it propagates through the atmosphere, and ...Read more
Author:Johnson, S; Mengersen, K; De Waal, A; Marnewick, K; Cilliers, D; Houser, AM; Boast, LDate:Feb 2010Relocation is one of the strategies used by conservationists to deal with problem cheetahs in southern Africa. The success of a relocation event and the factors that influence it within the broader context of long-term viability of wild cheetah ...Read more
Author:Kupfer, S; Santamaria-Aguilar, S; Van Niekerk, Lara; Lück-Vogel, Melanie; Vafeidis, ATDate:Oct 2020Extreme coastal flooding along the South African coast can be caused by the co-occurrence of waves, storm surges and tides. Importantly, in low-lying areas such as estuaries, the additional influence of river discharge can further exacerbate ...Read more
Author:Heyns, Johan A; Oxtoby, Oliver F; Suliman, RidhwaanDate:Jun 2013This study presents the extension of the volume-of-fluid solver, interFoam, for improved accuracy and efficiency when modelling dynamic liquid-gas systems. Examples of these include the transportation of liquids, such as in the case of fuel ...Read more
Author:MacLucas, David A; Gledhill, Irvy MADate:Jul 2014Computational Fluid Dynamics is routinely used in clearance of stores for carriage and release from aircraft in the transonic range of flight. A well-known validation case is modelled in this study, for which aerodynamic loads have been ...Read more
Author:Botha, NDate:Oct 2012This presentation outlines how the intraocular pressure inside the human eye can be estimated using numerical techniques. This can be used as a risk indicator in the diagnosis of glaucoma.Read more
Author:Nel, JJ; Le Roux, WH; Van der Schyf, O; Mostert, MDate:Jul 2007This paper describes the integration between two command and control simulators in order to clarify doctrinal issues surrounding Joint Air Defence using as example the uncertainty of roles and responsibilities between the Air Defence Cell of ...Read more