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Browsing Research Publications/Outputs by Cluster "Defence and Security"

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Academic and skills credentialing using distributed ledger technology (DLT) and W3C Standards: Technology assessment

Author: Mthethwa, Sthembile ; Pretorius, Morne Date: Dec 2022 The ongoing push for the 4th industrial revolution is setting the stage to digitise, persist and verify identity along with credentials. Academic and skills credentials are currently verified manually and have much scope for automation using ... Read more
Acceleration of hidden Markov model fitting using graphical processing units, with application to low-frequency tremor classification

Author: Stoltz, M ; Stoltz, George G ; Obara, K ; Wang, T ; Bryant, D Date: Nov 2021 Hidden Markov models (HMMs) are general purpose models for time-series data widely used across the sciences because of their flexibility and elegance. Fitting HMMs can often be computationally demanding and time consuming, particularly when ... Read more
Adding up the numbers: COVID-19 in South Africa

Author: Suliman, Ridhwaan ; Mtsweni, Jabu S Date: Jun 2022 The SARS-CoV-2 pandemic has wreaked havoc globally, with over half a billion people infected and millions of lives lost. The pandemic has also interrupted every aspect of our lives, with most governments imposing various interventions and ... Read more
Advancing cybersecurity capabilities for South African organisations through R&D

Author: Dawood, Zubeida C ; Mkuzangwe, Nenekazi NP Date: Mar 2022 There is a growth of cyber-attacks in South Africa. Seeing that there are over 38 million Internet users in South Africa, this is no surprise. The South African government has published the National Cybersecurity Policy Framework (NCPF) and ... Read more
An aerodynamic CFD analysis of inlet swirl in a micro-gas turbine combustor

Author: Meyers, Bronwyn C ; Grobler, Jan-Hendrik ; Snedden, GC Date: Jul 2023 A combustor was designed for a 200N micro-gas turbine [1, 2] using the NREC preliminary combustor design method [1, 2, 3]. During the design process, there are various aspects where there are no definitive methodologies for specifying the ... Read more
Age invariant face recognition methods: A review

Author: Baruni, Kedimotse P ; Mokoena, Nthabiseng ME ; Veeraragoo, Mahalingam ; Holder, Ross P Date: Dec 2021 Face recognition is one of the biometric technologies that is mostly used in surveillance and law enforcement for identification and verification. However, face recognition remains a challenge in verifying and identifying individuals due to ... Read more
Algebraic analysis of Toeplitz decorrelation techniques for direction-of-arrival estimation

Author: Shafuda, F ; McDonald, Andre M ; Van Wyk, MA ; Versfeld, J Date: Nov 2019 In this paper, we investigate the correlation Toeplitz (CTOP) and averaging Toeplitz (AVTOP) decorrelation techniques, as applied towards direction of arrival (DOA) estimation of coherent narrowband sources with the multiple signals classi ... Read more
An analysis of crypto scams during the Covid-19 pandemic: 2020-2022

Author: Botha, Johannes G ; Botha-Badenhorst, Danielle P ; Leenen, L Date: Mar 2023 Blockchain and cryptocurrency adoption has increased significantly since the start of the Covid-19 pandemic. This adoption rate has overtaken the Internet adoption rate in the 90s and early 2000s, but as a result, the instances of crypto scams ... Read more
An analysis of the MTI crypto investment scam

Author: Botha, Johannes G ; Pederson, T ; Leenen, L Date: Jun 2023 Since the start of the Covid-19 pandemic, blockchain and cryptocurrency adoption has increased significantly. The adoption rate of blockchain-based technologies has surpassed the Internet adoption rate in the 90s and early 2000s. As this ... 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
Apportioning human-induced and climate-induced land degradation: A Case of the Greater Sekhukhune District Municipality

Author: Kgaphola, Motsoko J ; Ramoelo, Abel ; Odindi, J ; Mwenge Kahinda, Jean-Marc ; Seetal, Ashwin R Date: Mar 2023 Land degradation (LD) is a global issue that affects sustainability and livelihoods of approximately 1.5 billion people, especially in arid/semi-arid regions. Hence, identifying and assessing LD and its driving forces (natural and anthropogenic) ... Read more
Approaches to Building a Smart Community: An Exploration Through the Concept of the Digital Village

Author: Phahlamohlaka, Letlibe J Date: Sep 2021 The unique approaches proposed in this book are ‘glocal’ in character, as they draw on the experiences of South Africans to address the global issue of ‘smart communities’. The book blends together social and technical aspects, and presents ... Read more
Assessment of homegarden agroforestry for sustainable land management intervention in a degraded landscape in South Africa

Author: Musvoto, Constansia D ; Kgaphola, Motsoko J ; Mwenge Kahinda, Jean-Marc Date: Dec 2021 Agroforestry-based sustainable land management (SLM) interventions provide opportunities for tackling land degradation and its associated socio-economic issues. Agroforestry is not a guaranteed SLM fix as every agroforestry practice is not ... Read more
BFO Classifier: Aligning domain ontologies to BFO

Author: Emeruem, C ; Keet, CM ; Dawood, Zubeida C ; Wang, S Date: Aug 2022 Foundational ontologies are known to have a steep learning curve, which hampers casual use by domain ontology developers to use them for domain ontology development. Foundational ontology developers have not provided methods or tools to lower ... Read more
Biases and debiasing of decisions in ageing military systems

Author: Pelser, Winnie C Date: Sep 2019 Many of the administrative decisions that must be made in a military environment are complex and rely on a rational analysis of situations. Decisions within the domain of ageing systems are particularly difficult and often riddled with different ... Read more
Biaxial estimation of biomechanical constitutive parameters of passive porcine sclera soft tissue

Author: Ndlovu, Z ; Desai, D ; Pandelani, Thanyani A ; Ngwangwa, H ; Nemavhola, F Date: Feb 2022 This study assesses the modelling capabilities of four constitutive hyperelastic material models to fit the experimental data of the porcine sclera soft tissue. It further estimates the material parameters and discusses their applicability ... Read more
Biaxial estimation of biomechanical constitutive parameters of passive porcine sclera soft tissue

Author: Ndlovu, Z ; Desai, D ; Pandelani, Thanyani A ; Ngwangwa, H ; Nemavhola, F Date: Feb 2022 This study assesses the modelling capabilities of four constitutive hyperelastic material models to fit the experimental data of the porcine sclera soft tissue. It further estimates the material parameters and discusses their applicability ... Read more
A bibliometric approach to support redefining management of technology for the post-digital world

Author: Oosthuizen, Rudolph Date: Sep 2021 Management of Technology (MoT) has evolved since its inception in the 1980s and definitions from the 1990s. However, the field's definition may not be keeping up with the ever-increasing changes in our world. This paper implements bibliometrics, ... Read more
Biometric recognition of infants using fingerprint, iris and ear biometrics

Author: Moolla, Yaseen ; De Kock, Antonie J ; Mabuza-Hocquet, Gugulethu P ; Ntshangase, Cynthia S ; Nelufule, Nthatheni ; Khanyile, Nontokozo P Date: Feb 2021 Biometric recognition is often used for adults for a variety of purposes where an individual’s identity must be ascertained. However, the biometric recognition of children is an unsolved challenge. Solving this challenge could protect children ... Read more
Biometric recognition of infants using fingerprints: Can the infant fingerprint be used for secure authentication?

Author: Nelufule, Nthatheni N ; Moolla, Yasneen ; Ntshangase, Cynthia S ; De Kock, Antoine J Date: Mar 2023 One of the first recognised and commonly used biometric modalities for men is the fingerprint, which is frequently used to register adults at home and in traffic centres. Fingerprint biometrics for babies, in particular, are not commonly used ... Read more

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