Conference Papers: Recent submissions
Now showing items 1-20 of 569
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Network resonance detection using harmonic active power
(IEEE, 2018)Resonances in electrical distribution systems can result in amplification of harmonics, which is undesirable in electrical networks. To avoid intrusive measurement techniques, in the majority of the cases network modeling ... -
Robust torque ripple mitigation of a line-start PMSM by means of the Taguchi method
(IEEE, 2019)—In this paper, a robust design framework is proposed to mitigate torque ripple for line-start permanent magnet synchronous machines (LS-PMSM) by using the Taguchi method. The framework is intended for fine-tuning initial ... -
CREAK descriptor evaluation for visual odometry
(IEEE, 2019)Each year, latest state of the art technologies and algorithms arise that claim and prove to-shine their predecessors. One such algorithm is the Colour-based Retina Key-point (CREAK) descriptor, which is based on the FAST ... -
Towards an unsupervised morphological segmenter for isiXhosa
(IEEE, 2019)In this paper, branching entropy techniques and isiXhosa language heuristics are adapted to develop unsupervised morphological segmenters for isiXhosa. An overview of isiXhosa segmentation issues is given, followed by ... -
Dynamic load-shedding for enhancement of power system stability for the Lesotho 132 kV transmission network
(IEEE, 2019)The transient and dynamic stability are key elements that a system should satisfy to achieve stable system operation [1]. Fault type and location determine the impact that each fault puts on the system and whether power ... -
Cathodic protection system design framework
(IEEE, 2019)The aim of this article is to establish a cathodic protection (CP) system design framework for the petrochemical industry in South Africa. The CP system design framework is destined to be used as a guideline when designing ... -
Comparative study of steam vs hot water as primary heat transfer medium for a laboratory scale two-tank heated system
(IEEE, 2019)The need exists for a benchmark multi-domain practical system that could emulate typical process faults for the purposes of condition monitoring. A proposition was made to develop a heated two-tank system, due to its ... -
Theorising on information cascades and sequential decision-making for analysing security behaviour
(ICISSP, 2019)Human behaviour is an ever-present aspect in information security and requires special attention when seeking to secure information systems. Information security behaviour is often based on an informed decision where ... -
Test problems for the verification and validation of the radiation, conduction and convection capabilities of system codes
(ICHMT, 2017)The purpose of the reactor cavity cooling system in a nuclear plant is to remove the heat released by the reactor pressure vessel effectively. The reactor cavity cooling system must be able to operate naturally or passively ... -
A practical application of critical systems thinking to improve a business intelligence system’s business requirements
(ISSS, 2017)Efficacious decision-making requires relevant, intelligible information. Organisations implement data warehousing/business intelligence systems to provide required information timeously for improved decision-making ... -
Industry needs for data warehousing students: using SSM as hermeneutic data analysis tool for interpretive interview data
(ISSS, 2017)The soft systems methodology was developed by Peter Checkland over an extended period of time to assist organisational improvements. It provides tools to assist different stakeholders to articulate their perspectives on ... -
Retinal vessel caliber and vessel reaction to light flicker in true normotensive young healthy black and white adults: the African-PREDICT study
(Karger, 2019)A detrimental shift in cardiovascular disease risk factors and a higher mortality level are reported in some black populations. The retinal microvasculature provides insight into the pathogenesis of systemic vascular ... -
Heart rate variability and the dynamic nature of the retinal microvasculature: providing insight into the brain-retina-heart link: the SABPA study
(Karger, 2019)Controversy exists regarding the contribution of the autonomic nervous system (ANS) to the retinal microvasculature’s autoregulatory capacities. It was demonstrated that mean retinal vessel responses to systemic sympathetic ... -
Brain-derived-neurotrophic-factor, dynamic retinal vessel responses during flicker light and stroke risk: the SABPA study
(Karger, 2019)Assessment of the retinal vessels’ structure and function provides an automated and objective approach to noninvasively assess the condition of the cerebral microvasculature and indicates susceptibility for stroke. ... -
Stress and neurovascular coupling: a red flag? The SABPA study
(Karger, 2019)Neuronal hyperactivity mediates communication between neurons and blood vessels (neurovascular coupling) and increases susceptibility for retinal ganglion cells functionality. Contrastingly, monoamine depletion and ... -
The oxidative stress profile and its relation to vascular function in a bi-ethnic cohort: the SABPA study
(Karger, 2019)Oxidative stress and inflammation has been implicated in arterial stiffness, and hypertension development. Oxidative stress may interfere with normal vascular function by inactivation of NO and/or the production of ... -
Pulsations from the Vela pulsar down to 20 GeV with H.E.S.S. II
(Sissa Medialab, 2015)The Vela pulsar (PSR J0835 − 4510) is the brightest persistent source in the high-energy γ-ray sky. It is a relatively near, young and energetic rotation-powered pulsar. Vela was a key target for the High Energy Stereoscopic ... -
Multiwavelength polarization as a diagnostic of blazar physics
(Sissa Medialab, 2015)The nature of the high-energy emission in jet-dominated AGN (especially blazars) as well as the location and mode of acceleration of particles to ultra- relativistic energies are a matter of intensive debate. Both leptonic ... -
VHE observations of the gamma-ray binary system LS 5039 with H.E.S.S.
(Sissa Medialab, 2015)LS 5039 is a gamma-ray binary system observed in a broad energy range, from radio to TeV energies. The binary system exhibits both flux and spectral modulation as a function of its orbital period. The X-ray and ... -
H.E.S.S. discovery of very-high-energy gamma-ray emission of PKS 1440-389
(Sissa Medialab, 2015)Blazars are the most abundant class of known extragalactic very-high-energy (VHE, E>100 GeV) gamma-ray sources. However, one of the biggest difficulties in investigating their VHE emission resides in their limited number, ...
