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Electrical, Electronic and Computer Engineering: Recent submissions

  • Time-interleaved noise jamming 
    Claassen, Gert; Du Plessis, W.P. (Warren Paul) (Institute of Electrical and Electronics Engineers, 2023-06)
    Modern jamming systems are faced with the reality that multiple threat radars will be encountered simultaneously, and potentially, all simultaneously encountered threat radars will need to be countered to prevent detection. ...
  • Three-antenna characterization techniques employing spherical near-field scanning with higher-order probe correction 
    Mayhew-Ridgers, Gordon; Van Jaarsveld, Paul A.; Odendaal, J.W. (Johann Wilhelm) (Institute of Electrical and Electronics Engineers, 2023-09)
    The three-antenna technique is typically used in the context of absolute-gain measurements where no gain standard is required. When implemented in a spherical near-field test range, the conventional approach is to use ...
  • Loop-mediated isothermal aplification detection of SARS-CoV-2 and myriad other applications 
    Moore, Keith J. M.; Cahill, Jeremy; Aidelberg, Guy; Aronoff, Rachel; Bektas, Ali; Bezdan, Daniela; Butler, Daniel J.; Chittur, Sridar V.; Codyre, Martin; Federici, Fernan; Tanner, Nathan A.; Tighe, Scott W.; True, Randy; Ware, Sarah B.; Wyllie, Anne L.; Afshin, Evan E.; Bendesky, Andres; Chang, Connie B.; Dela Rosa, Richard II; Elhaik, Eran; Erickson, David; Goldsborough, Andrew S.; Grills, George; Hadasch, Kathrin; Hayden, Andrew; Her, Seong-Young; Karl, Julie A.; Kim, Chang Hee; Kriegel, Alison J.; Kunstman, Thomas; Landau, Zeph; Land, Kevin; Langhorst, Bradley W.; Lindner, Ariel B.; Mayer, Benjamin E.; McLaughlin, Lee A.; McLaughlin, Matthew T.; Molloy, Jenny; Mozsary, Christopher; Nadler, Jerry L.; D’Silva, Melinee; Ng, David; O’Connor, David H.; Ongerth, Jerry E.; Osuolale, Olayinka; Pinharanda, Ana; Plenker, Dennis; Ranjan, Ravi; Rosbash, Michael; Rotem, Assaf; Segarra, Jacob; Schurer, Stephan; Sherrill-Mix, Scott; Solo-Gabriele, Helena; To, Shaina; Vogt, Merly C.; Yu, Albert D.; Mason, Christopher E.; The gLAMP Consortium (Association of Biomolecular Resource Facilities, 2022-09)
    As the second year of the COVID-19 pandemic begins, it remains clear that a massive increase in the ability to test for SARS-CoV-2 infections in a myriad of settings is critical to controlling the pandemic and to preparing ...
  • Global use and outcomes of the hearWHO mHealth hearing test 
    De Sousa, K.C. (Karina); Smits, Cas; Moore, David R.; Chada, Shelly; Myburgh, Hermanus Carel; Swanepoel, De Wet (Sage, 2022-09)
    OBJECTIVES : The objective of this study was to examine the uptake, user characteristics, and performance of the free WHO smartphone hearing screening test (hearWHO) as a global hearing health promotion initiative. METHOD ...
  • Diotic and antiphasic digits-in-noise testing as a hearing screening and triage tool to classify type of hearing loss 
    De Sousa, K.C. (Karina); Smits, Cas; Moore, David R.; Myburgh, Hermanus C.; Swanepoel, De Wet (Lippincott Williams and Wilkins, 2022-05)
    OBJECTIVES : The digits-in-noise test (DIN) is a popular self-test measure that has traditionally been used to screen for hearing loss by providing either a pass or refer result. Standard approaches either tested each ear ...
  • Harnessing eXplainable artificial intelligence for feature selection in time series energy forecasting : a comparative analysis of Grad-CAM and SHAP 
    Van Zyl, Corne; Ye, Xianming; Naidoo, Raj (Elsevier, 2024-01)
    This study investigates the efficacy of Explainable Artificial Intelligence (XAI) methods, specifically Gradient-weighted Class Activation Mapping (Grad-CAM) and Shapley Additive Explanations (SHAP), in the feature selection ...
  • Hot carrier degradation of mixed-mode polysilicon light emitting diodes 
    Goosen, Marius Eugene; Venter, Petrus J.; Faure, Nicolaas M.; Msomi, Promise N.; Schoeman, Johan; Joubert, Trudi-Heleen (Elsevier, 2023-06)
    This paper investigates the degradation and reliability of polysilicon light emitters implemented in a standard 0.35 μm CMOS process. A total of 48 identical hot carrier electroluminescent emitters were subjected to high ...
  • On-line automatic controller tuning of a multivariable grinding mill circuit using Bayesian optimisation 
    Van Niekerk, J.A.; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2023-08)
    Process controllers are abundant in the industry and require attentive tuning to achieve optimal performance. While tuning controllers by the most primitive method of trial and error is possible, it often leads to sub-optimal ...
  • Optimal control of mineral processing plants using constrained model predictive static programming 
    Noome, Zander M.; Le Roux, Johan Derik; Padhi, Radhakant (Elsevier, 2023-09)
    The model predictive static programming (MPSP) technique, which is extended recently to incorporate applicable state and control constraints, operates on the philosophy of nonlinear model predictive control (NMPC). However, ...
  • Extremum seeking control of a flotation circuit using peak air recovery 
    Wepener, D.A.; Le Roux, Johan Derik; Craig, Ian Keith (Elsevier, 2023-09)
    A flotation circuit is controlled in simulation using an extremum seeking control (ESC) approach to keep the cells operating at the optimal operating point, as represented by peak air recovery. It is assumed that optimal ...
  • An enhanced space vector PWM strategies for three phase asymmetric multilevel inverter 
    Kumar, B. Hemanth; Janardhan, K.; Kumar, R. Seshu; Rahul, J. Ramesh; Singh, Arvind R.; Naidoo, Raj; Bansal, Ramesh C. (Hindawi Limited, 2023-02-20)
    This work presents the two space vector pulse width modulation (SVPWM-I and SVPWM-II) strategies for eleven-level (11L) asymmetric cascaded H-bridge (CHB) multilevel inverter (MLI). Depending on the isolated structure and ...
  • A single DC source generalized switched capacitors multilevel inverter with minimal component count 
    Jena, Kasinath; Kumar, Dhananjay; Kumar, B. Hemanth; Janardhan, K.; Singh, Arvind R.; Naidoo, Raj; Bansal, Ramesh C. (Hindawi, 2023-06-03)
    This paper presents a new single-source switched capacitor- (SC-) based multilevel inverter (MLI) design with a boosting potential of three times the supply voltage. To produce a waveform with seven output voltage levels, ...
  • Anomalous reflection from a phase gradient metasurface with arbitrary incident angle 
    Barnard, Wihan; Odendaal, J.W. (Johann Wilhelm); Joubert, Johan (Institute of Electrical and Electronics Engineers, 2023-02)
    A planar phase gradient metasurface (PGM) with phase gradients in two in-plane directions will introduce two additional wave vectors to the reflected wave vector. For small incident angles, close to the normal vector, the ...
  • Modular multilevel converter-based microgrid : a critical review 
    Bashir, Safia Babikir; Ismail, Ali A.; Elnady, A.; Farag, Mena Maurice; Hamid, Abdul Kadir; Bansal, Ramesh C.; Abo-Khalil, Ahmed G. (Institute of Electrical and Electronics Engineers, 2023-06)
    Recently, the Modular Multilevel Converter (MMC) has drawn significant attention due to its diverse merits and its applicability to a wide range of medium to high-power applications. The growing interest in the MMC can be ...
  • Insecticide monitoring in cattle dip with an e-nose system and room temperature screen-printed ZnO gas sensors 
    Rohde, Archibald W.; Nel, Jacqueline Margot; Joubert, Trudi-Heleen (MDPI, 2023-07-26)
    Taktic, an Amitraz-based insecticide, is commonly used in sub-Saharan Africa to treat cattle for ticks. Due to misuse in rural dipping pools, some ticks are showing resistance to Taktic. This work presents a low-cost e-nose ...
  • A backhaul adaptation scheme for IAB networks using deep reinforcement learning with recursive discrete choice model 
    Sande, Malcolm Makomborero; Hlophe, Mduduzi Comfort; Maharaj, Bodhaswar T. Sunil (Institute of Electrical and Electronics Engineers, 2023-02)
    Challenges such as backhaul availability and backhaul scalability have continued to outweigh the progress of integrated access and backhaul (IAB) networks that enable multi-hop backhauling in 5G networks. These challenges, ...
  • Connect2NFT : a web-based, blockchain enabled NFT application with the aim of reducing fraud and ensuring authenticated social, non-human verified digital identity 
    Bellagarda, Jagger S.; Abu-Mahfouz, Adnan (MDPI, 2022-10-23)
    As of 2022, non-fungible tokens, or NFTs, the smart contract powered tokens that represent ownership in a specific digital asset, have become a popular investment vehicle. In 2021, NFT trading reached USD 17.6 billion ...
  • A dipole with reflector-backed active metasurface for linear-to-circular polarization reconfigurability 
    Van Aardt, Ruan; Joubert, Johan; Odendaal, J.W. (Johann Wilhelm) (MDPI, 2022-04)
    In recent years, significant advances have been made in diversifying the capabilities of communication systems by using reconfigurable antennas. There are many types of reconfigurable antennas—to achieve pattern, frequency, ...
  • Micro-grid energy optimisation with demand management 
    Louw, Jacobus (University of Pretoria, 2023)
    Pressure on the utility grid and aims to reduce carbon emissions have led to the development of micro-grids. Extensive research has been done to optimally utilise the various energy sources present therein. Demand management ...
  • A fuzzy-logic based adaptive data rate scheme for energy-efficient LoRaWAN communication 
    Kufakunesu, Rachel; Hancke, Gerhard P.; Abu-Mahfouz, Adnan (MDPI, 2022-12)
    Long RangeWide Area Network (LoRaWAN) technology is rapidly expanding as a technology with long distance connectivity, low power consumption, low data rates and a large number of end devices (EDs) that connect to the ...