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Browsing by Cluster "Defence and Security"

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Algebraic analysis of Toeplitz decorrelation techniques for direction-of-arrival estimation

Author: Shafuda, F ; McDonald, Andre Martin ; 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
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
Characterizing optical filters for wildfire detectors

Author: Mashaba, Nikiwe P ; Griffith, DJ Date: Nov 2020 Near infrared detectors have gained popularity, mainly in the military, because of their capability of detecting wildfires. The Council for Scientific and Industrial Research (CSIR) focuses on the development and deployment of wildfire detectors ... Read more
Circular interpolation techniques towards accurate segmentation of iris biometric images for infants

Author: Nelufule, Nthatheni ; Mabuza-Hocquet, Gugulethu P ; De Kock, Antonie J Date: Jan 2020 In most biometric modalities, recognition and authentication methods for adults have already been fully designed, developed and commercially available. However, for infants and children who are the most vulnerable population to abduction, ... Read more
Circular interpolation techniques towards accurate segmentation of iris biometric images for infants (conference paper)

Author: Nelufule, Nthatheni ; Mabuza-Hocquet, Gugulethu P ; De Kock, Antonie J Date: Jan 2020 In most biometric modalities, recognition and authentication methods for adults have already been fully designed, developed and commercially available. However, for infants and children who are the most vulnerable population to abduction, ... Read more
Cyber threats focusing on Covid-19 outbreak

Author: Veerasamy, Namosha Date: Feb 2021 The outbreak of the novel corona virus or Covid-19 has sparked a wave of changes. Social-distancing and remote working meant that increasingly employees and individuals were reliant on Information Communication Technologies (ICT) to connect ... Read more
Cyber-threat information-sharing standards: A review of evaluation literature

Author: Mkuzangwe, Nenekazi N ; Khan, Zubeida Date: Jun 2020 Cyber-threat information-sharing tools, through which cybersecurity teams share threat information, are essential to combatting today's increasingly frequent and sophisticated cyber-attacks. Several cyber-threat information-sharing standards ... Read more
Digital forensics supported by machine learning for the detection of online sexual predatory chats

Author: Ngejane, Hombakazi C ; Eloff, JHP ; Sefara, Tshephisho J ; Marivate, VN Date: Mar 2021 Chat-logs are informative digital footprints available on Social Media Platforms (SMPs). With the rise of cybercrimes targeting children, chat-logs can be used to discover and flag harmful behaviour for the attention of law enforcement units. ... Read more
The effects of image smoothing on CNN-based detectors

Author: Skosana, Vusi J ; Ngxande, M Date: Jan 2020 Edge-preserving smoothing filters have been shown to improve generalisation performance on the HOG features with a SVM classifier. However, not all smoothing filters and parameters lead to better performance. The effects of smoothing filters ... Read more
Fake news and deepfakes: A dangerous threat for 21st century information security

Author: Botha, Johannes G ; Pieterse, Heloise Date: Mar 2020 Fake news, often referred to as junk news or pseudo-news, is a form of yellow journalism or propaganda created with the purpose of distributing deliberate disinformation or false news using traditional print or online social media. Fake news ... Read more
FPGA implementation of fast & secure fingerprint authentication using trsg (true random and timestamp generator)

Author: Harikrishnan, D ; Kumar, NS ; Joseph, RS ; Nair, Kishor K Date: Apr 2021 In the digital authentication system, the emerging technology is fingerprint authentication, which have been concentrated more attraction towards security and control. Existing authentication systems such as Biometric cryptosystems, Cancellable ... Read more
Identification of information security controls for fitness wearable manufacturers

Author: Moganedi, Mapoung S ; Pottas, D Date: Aug 2020 Statista suggests that there would be 368.2 million wearables shipped globally in 2020 with a projection of 500 million by 2024. These predictions are becoming a reality considering the fast growing of Intent of Things (IoT) do-main. These ... Read more
The importance of understanding the market before introducing a new product: A case study

Author: Rapiya, XL ; Malik, Humna H ; Pretorius, JHC Date: Sep 2020 In the product development process, needs analysis is the first stage of the process and without the need analysis, you are risking your product to fail. The needs analysis involves a process of understating the market broadly. Understanding ... Read more
Improving spatial domain based image formation through compressed sensing

Author: Stoltz, George G ; Nel, AL Date: Oct 2020 In this paper, we improve image reconstruction in a single-pixel scanning system by selecting an detector optimal field of view. Image reconstruction is based on compressed sensing and image quality is compared to interpolated staring arrays. ... Read more
Inclusive development using a micro-tasking approach for building smart communities

Author: Mtsweni, Jabu S ; Modiba, FS Date: Oct 2020 African communities suffer a series of socio-economic challenges that seem difficult to eradicate. The challenges include lack of access to essential services and infrastructure; high levels of poverty, and unemployment, especially amongst ... Read more
Modelling of the complex societal problem of establishing a national energy sufficiency competence

Author: Roodt, JH ; Leenen, L ; Van Vuuren, JJ ; Dawood, Zubeida C Date: Jul 2020 Complex societal problems require a multidisciplinary and multi-method approach to develop models that can support the development of solutions. General morphological analysis is a qualitative method to extract information from experts through ... Read more
A novel approach to solving the generalized inverse Frobenius-Perron problem

Author: McDonald, Andre M ; Van Wyk, M Date: Oct 2020 A new approach to solving a more general formulation of the inverse Frobenius-Perron problem, which requires the construction of a one-dimensional ergodic map with prescribed invariant probability density function and power spectral density, ... Read more
Optical coherence tomography latent fingerprint image denoising

Author: Mgaga, Sboniso S ; Tapamo, JR Date: Dec 2020 Latent fingerprints are fingerprint impressions left on the surfaces a finger comes into contact with. They are found in almost every crime scene. Conventionally, latent fingerprints have been obtained using chemicals or physical methods, ... Read more
Optimization of nonaxisymmetric endwall contours for the rotor of a low speed, 1½ -stage research turbine with unshrouded blades— optimization and experimental validation

Author: Bergh, J ; Snedden, Glen ; Dunn, Dwain Date: Apr 2020 This paper presents the predicted, as well as final experimental results for the design of an automatically optimized non-axisymmetric endwall and as such, attempts to close the loop between design and practice, providing additional information ... Read more
Performance estimation of a real-time Rosette imager

Author: Stoltz, George G ; Stoltz, M Date: Sep 2020 In this paper, we model a real-time feasible rosette imager, consisting of a rosette scanner, an optical sensor and a deterministic image reconstruction algorithm. We fine-tune the rosette imager through selecting the appropriate sensor field ... Read more

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Browsing by Cluster "Defence and Security"

Browsing by Cluster "Defence and Security"

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