Conference Publications: Recent submissions

Now showing items 201-220 of 5732

The impact of gateway node density on the performance of LoRaWAN

Author: Kufakunesu, Rachel ; Hancke, Gerhard P ; Abu-Mahfouz, Adnan MI Date: Aug 2022 The concept of Internet of Things (IoT) has increased in prominence as the demand for device interconnectedness increases worldwide. Numerous technologies have been proposed to provide the required technology and network infrastructure. Low ... Read more
Process and materials design for laser cladded inconel-625/tungsten carbide wear-resistant composite coatings

Author: Olakanm, EO ; Hoosain, Shaik E ; Lawal, SA ; Pityana, Sisa L Date: Jun 2022 Tailoring materials’ microstructural characteristics to meet mechanical functional requirements is quite critical in designing wear resistant coatings. To the best of our knowledge, no study had related carbide dissolution ratio (CDR) in laser ... Read more
Microstructure and tensile properties of heattreated Ti-Mo alloys

Author: Raganya, Mampai L ; Moshokoa, Thabiseng ; Machaka, Ronald ; Obadele, B ; Makhatha, M Date: Dec 2022 Current research is focused on development of ß-type titanium alloys for biomedical applications as substitutes of the undesirable Ti6Al4V alloy. Ti6Al4V alloy has a higher elastic modulus (110 GPa) than that of the human bone (10-30 GPa) and ... Read more
Testing performance for several use cases with an indoor OpenAirInterface USRP-Based base station

Author: Dludla, Angeline G ; Vilakazi, Mlamuli C ; Burger, Chris R ; Lysko, Albert A ; Ngcama, Lwando ; Mboweni, Lawrence ; Masonta, Moshe ; Kobo, Hlabishi I ; Mamushiane, Lusani Date: Nov 2022 This paper presents the early phases of the implementation of a Radio Access Network (RAN) based on OpenAirInterface (OAI) for a fifth-generation (5G) mobile network. Because the availability of full OAI 5G support was delayed, we initially ... Read more
Harmful algal blooms and satellite earth observation

Author: Smith, Marie E Date: Jul 2022 The southern Benguela is divided into the West Coast and the South-West Coast regions owing to a change in coastline orientation at Cape Point. These biogeographic regions are reflected in both the make-up and frequency of phytoplankton blooms. ... Read more
Nanoindentation and corrosion behaviour of 410 stainless steel fabricated via additive manufacturing

Author: Lesufi, M ; Akinwamide, SO ; Makoana, Nkutwane W ; Tshabalala, Lerato C ; Olubambi, PA Date: Sep 2022 This study investigates the microstructural, nanomechanical, and corrosion behaviour of different sections of 410 steel fabricated via directed energy deposition technique. The morphology exhibited by the longitudinal and transverse sections ... Read more
Investigating the electronic and magnetic properties of Dy, Y and La by site substitution on Nd2Fe14B permanent magnet employing the first-principle approach

Author: Miya, LE ; Sithole, ME ; Modiba, Rosinah Date: Dec 2021 The development of new Nd-Fe-B permanent magnets continues to be a pressing matter for the transition to a green economy. Permanent magnets have become significant in applications of highly efficient energy conversion machines and devices. ... Read more
Investigating the effects of Carbon and Boron atoms on the t- MnAl alloy properties employing the first principle approach

Author: Sebe, ID ; Sithole, ME ; Modiba, Rosinah Date: Dec 2022 Permanent magnet-based technologies are focusing on the use of t-phase magnetic alloys. The t-MnAl permanent magnetic alloys are interesting candidates to fill the performance gap between the expensive rare-earth-based magnets and the low ... Read more
Fabrication of a ß-based titanium alloy for biomedical applications

Author: Madigoe, Mandy N ; Modiba, Rosinah ; Lesley, Cornish, L Date: Nov 2022 The aim of this study was to produce a titanium-based alloy with mainly ß-phase and reduced Young’s modulus for biomedical applications. Alloys Ti-Nbx-Ta5-Zr5 (x = 20, 30, 40 at.%Nb) were prepared by arc melting then solution annealed at 950 ... Read more
Systems thinking in impact assessment: Where we are and where we're going

Author: Snyman-van der Walt, Luanita ; Schreiner, Gregory O ; Lochner, Paul A Date: Dec 2022 Those 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
Rainwater harvesting design approaches

Author: Gibberd, Jeremy T Date: Dec 2022 Different approaches have been developed to design rainwater harvesting systems. However, these have not been widely applied in schools and are not well understood. This paper presents findings from a study in which different rainwater water ... Read more
The numerical aerodynamic investigation of swirling inlet flow in a vaporizer tube micro-gas turbine combustor

Author: Meyers, Bronwyn C ; Grobler, Jan-Hendrik ; Snedden, GC Date: Sep 2022 A combustor was designed for a 200N micro-gas turbine for the model aircraft industry using the NREC design method. Multiple designs resulted which varied in terms of annular area split configuration, hole area splits and relative hole ... Read more
An intelligent gender classification system in the era of pandemic chaos with veiled faces

Author: Rasheed, J ; Waziry, S ; Alsubai, S ; Abu-Mahfouz, Adnan MI Date: Jul 2022 In the world of chaos, the pandemic has driven individuals around the globe to wear face masks for preventing the virus’s transmission, however, this has made it difficult to determine the gender of the person wearing a mask. Gender information ... Read more
Lessons learned from separation at source implementation in Newcastle

Author: Polasi, Tumisang ; Oelofse, Suzanna HH Date: Oct 2022 A waste separation at source (S@S) pilot study was conducted in two areas in the Newcastle Local Municipality. The aim was to draw on the lessons learned from implementing waste S@S in a municipalitiy to inform and provide guidance on ... Read more
School water and rainwater use modeller

Author: Gibberd, Jeremy T Date: Dec 2022 With climate change, schools in hot and dry areas are increasingly experiencing water shortages. This can affect the health of students and teachers, disrupt education and in the worst case, lead to school closures. Rainwater harvesting can ... Read more
Framework for critical infrastructure security rating

Author: Chauke, Mapoo D ; Mphadzha, Fhumulani R Date: Feb 2022 Proper functioning of a nation's economy and society requires that its critical infrastructure is safe and secure. The protection of critical infrastructure is becoming a growing concern to national governments, infrastructure managers and ... Read more
Cross-dataset performance evaluation of deep learning distracted driver detection algorithms

Author: Zandamela, Frank ; Ratshidaho, Terence ; Nicolls, F ; Stoltz, George G Date: Nov 2022 Deep learning has gained traction due its supremacy in terms of accuracy and ability to automatically learn features from input data. However, deep learning algorithms can sometimes be flawed due to many factors such as training dataset, ... Read more
Electrical resistivity and oxidation behavior of Cu and Ti doped laser deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: Sep 2022 In this study, AlCoCrFeNi–Cu (Cu-based) and AlCoCrFeNi–Ti (Ti-based) high entropy alloys (HEAs) were fabricated using a direct blown powder technique via laser additive manufacturing on an A301 steel baseplate for aerospace applications. The ... Read more
Improving reinforcement learning with ensembles of different learners

Author: Crafford, Gerhardus J ; Rosman, B Date: Nov 2022 Different reinforcement learning (RL) methods exist to address the problem of combining multiple different learners to generate a superior learner. These existing methods usually assume that each learner uses the same algorithm and/or state ... Read more
Application of geospatial data in cyber security

Author: Veerasamy, Namosha ; Yoolla, Yaseen ; Dawood, Zubeida C Date: Jun 2022 Geospatial data is often perceived as only being related to maps, compasses and locations. However, the application areas of geospatial data are far wider and even extend to the field of cybersecurity. Not only is there an ability to show ... Read more

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