Author:Burger, L; Forbes, ADate:2007A simple model of a Porro prism laser resonator has been found to correctly predict the formation of the “petal” mode patterns typical of these resonators. A geometrical analysis of the petals suggests that these petals are the lowest−order ...Read more
Author:Butgereit, L; Botha, RADate:Nov 2011Dr MathTM is a mobile, online tutoring system where learners can use MXitTM on their mobile phones to receive help with their mathematics homework from volunteer tutors. These conversations between learners and Dr Math are held in MXit lingo. ...Read more
Author:Mwandila, G; Mwanza, M; Sikhwivhilu, K; Siame, J; Mutanga, Shingirirai S; Simposya, ADate:Jun 2021An analytical model to determine energy requirements for a Biogas-supported Decentralized Water Treatment Systems was carried out based on energy consumption in Zambia and energy produced during water reclamation from wastewater in South ...Read more
Author:Tokarev, A; Avdeenkov, AV; Langmi, Henrietta W; Bessarabov, DGDate:Mar 2015Boron-substituted graphene decorated with potassium metal atoms was considered as a novel material for hydrogen storage. Density functional theory calculations were used to model key properties of the material, such as geometry, hydrogen ...Read more
Author:Mbecke, PDate:Jun 2010This paper is based on an in-progress Ph.D. research themed: “Modeling the Differential Incidence of Child Abuse, Neglect and Exploitation in Poor Households in South Africa”. The aim of the research is to build a theoretical grounding and ...Read more
Author:Dube, CDate:Nov 2011Mobile manipulators are used in a number of different applications such as bomb disposal, mining robotics, and search and rescue operations. These mobile manipulators are highly susceptible to tip over due to the motion of the manipulator or ...Read more
Author:Kemp, N; Breetzke, GD; Cooper, Antony KDate:Sep 2020In this study, we model the risk of robbery in the City of Tshwane in South Africa. We use the collective knowledge of two prominent spatial theories of crime (social disorganization theory, and crime pattern theory) to guide the selection ...Read more
Author:Rezai, O; Kleinhans, A; Matallanas, E; Selby, B; Tripp, BPDate:Oct 2014The monkey anterior intraparietal area (AIP) encodes visual information about three-dimensional object shape that is used to shape the hand for grasping. We modeled shape tuning in visual AIP neurons and its relationship with curvature and ...Read more
Author:Zunckel, M; Koosailee, A; Yarwood, G; Maure, G; Venjonoka, K; Van Tienhoven, AM; Otter, LDate:Jul 2006Monitoring of surface ozone over southern Africa has shown that ambient concentrations often exceed a threshold of 40 ppb at which damage to vegetation by ozone could be expected. The Cross Border Air Pollution Assessment Project (CAPIA) was ...Read more
Author:Smit, Jacoba E; Hanekom, T; Hanekom, JJDate:Sep 2009The objective of this study was to determine if a recently developed human Ranvier node model, which is based on a modified version of the Hodgkin-Huxley model, could predict the excitability behaviour in human peripheral sensory nerve fibres ...Read more
Author:Zunckel, M; Robertson, L; Tyson, PD; Rodhe, HDate:2000Ambient SO2 concentrations and atmospheric deposition of sulphur resulting from emissions on the industrialised highveld region of South Africa are estimated using the multi-scale atmospheric transport and chemistry (MATCH) modelling system, ...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: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: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:Holmes, DG; Cheng, L; Shimaponda-Nawa, M; Familua, AD; Abu-Mahfouz, Adnan MIDate:Jul 2019Visible light communication (VLC) has the potential to supplement the growing demand for wireless connectivity. In order to achieve the full potential of VLC, channel models are required. Discrete channel models based on semi-hidden Markov ...Read more
Author:Bezuidenhout, PH; Schoeman, J; Joubert, THDate:Mar 2014Microsensing is a leading field in technology due to its wide application potential, not only in bio-engineering, but in other fields as well. Microsensors have potentially low-cost manufacturing processes, while a single device type can have ...Read more