Browsing Faculty of Natural Sciences by Title
Now showing items 708-727 of 2567
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Emotion and stress recognition related sensors and machine learning technologies
(MPDI, 2021)Intelligent sociotechnical systems are gaining momentum in today’s informationrich society, where different technologies are used to collect data from such systems and mine this data to make useful insights about our ... -
Empowerment of rural farmers through information sharing using inexpensive technologies
(ACM, 2011)This paper discusses how to empower rural farmers to do business by means of inexpensive mobile technologies. In particular, the aim is to take advantage of the inexpensive features of low-end mobile phones to access market ... -
Enabling unsupervised discovery in astronomical images through self-supervised representations
(Oxford University Press, 2024)Unsupervised learning, a branch of machine learning that can operate on unlabelled data, has proven to be a powerful tool for data exploration and discovery in astronomy. As large surveys and new telescopes drive a rapid ... -
Endocrine contribution to the sexual dysfunction in patients with advanced chronic kidney disease and the role of hyperprolactinemia
(John Wiley and Sons Inc, 2021)In this study, we investigated the prevalence of sexual dysfunction among males with advanced chronic kidney disease and the effect of treating hyperprolactinemia among these patients. In this prospective study, patients ... -
Energy-momentum tensor and helicity for gauge fields coupled to a pseudoscalar inflaton
(University of the Western Cape, 2019)We study the energy-momentum tensor and helicity of gauge fields coupled through $g \phi F \tilde{F}/4$ to a pseudo-scalar field $\phi$ driving inflation. Under the assumption of a constant time derivative of the background ... -
Engaging ICTs as a “Tool” for eHealth prioritization on human development and poverty reduction in the African region
(Institute of Electrical and Electronics Engineers (IEEE) Inc., 2011)The association connecting information and communication technologies (ICTs) and well-being or poverty remains vague and research today has resulted to divergent conclusions. This paper defines ICTs as “tools” that facilitate ... -
Engineering pyruvate decarboxylase-mediated ethanol production in the thermophilic host Geobacillus thermoglucosidasius
(Springer Verlag, 2013)This study reports the expression, purification, and kinetic characterization of a pyruvate decarboxylase (PDC) from Gluconobacter oxydans . Kinetic analyses showed the enzyme to have high affinity for pyruvate (120 μM at ... -
Enhanced anti-bacterial activity of biogenic silver nanoparticles synthesized from terminalia mantaly extracts
(Dove Press, 2019)The global increase in outbreaks and mortality rates associated with multidrug- resistant (MDR) bacteria is a major health concern and calls for alternative treatments. Natural-derived products have shown potential in ... -
Enhanced drug loading capacity of polypyrrole nanowire network for confrolled drug release
(Elsevier, 2013)For a conducting polymer (CP) based drug release system, drug loading is often accomplished by a doping process, in which drug is incorporated into polymer as dopant. Therefore, the drug loading capacity is relatively low ... -
Enhanced efficiency and stability of sky blue perovskite light-emitting diodes via introducing lead acetate
(Multidisciplinary Digital Publishing Institute (MDPI), 2024)All-inorganic metal halide perovskite is promising for highly efficient and thermally stable perovskite light-emitting diodes (PeLEDs). However, there is still great room for improvement in the film quality, including low ... -
Enhanced electrochemical glucose sensing performance of CuO:NiO mixed oxides thin film by plasma assisted nitrogen doping
(Elsevier, 2021)In this study plasma-assisted nitrogen doping of a CuO–NiO mixed oxide thin film was presented. The as prepared film was also applied as a glucose sensor. The nitrogen species generated during plasma ignition resulted in ... -
Enhanced low-humidity performance of proton exchange membrane fuel cell by incorporating phosphoric acid-loaded covalent organic framework in anode catalyst layer
(Elsevier, 2021)Developing self-humidifying membrane electrode assembly (MEA) is of great significance for the practical use of proton exchange membrane fuel cell (PEMFC). In this work, a phosphoric acid (PA)-loaded Schiff base networks ... -
Enhanced performance of polybenzimidazole-based high temperature proton exchange membrane fuel cell with gas diffusion electrodes prepared by automatic catalyst spraying under irradiation technique
(Elsevier, 2013)Gas diffusion electrodes (GDEs) prepared by a novel automatic catalyst spraying under irradiation (ACSUI) technique are investigated for improving the performance of phosphoric acid (PA)-doped polybenzimidazole (PBI) high ... -
Enhanced photovoltaic effects of microwave-assisted polyolsynthesized Cu2(Pd/Zn)SnS4 kesterite nanoparticles
(Elsevier, 2023)Kesterite materials show excellent optical and semiconductive properties for use as petype absorber layer in photovoltaic (PV) applications, but they have a high open circuit voltage deficit (Voc,def) due to high antisite ... -
Enhanced symmetry energy may bear universality of r-process abundances
(Oxford University Press, 2023)The abundances of about half of the elements heavier than iron are subtly attuned by the rapid neutron capture process or r -process, which is intimately related to the competition between neutron capture, photo-disintegration, ... -
Ensuring the security and privacy of information in mobile health-care communication systems
(Academy of Science of South Africa, 2011)The sensitivity of health-care information and its accessibility via the Internet and mobile technology systems is a cause for concern in these modern times. The privacy, integrity and confidentiality of a patient’s data ... -
Environmental contaminants and male infertility: Effects and mechanisms
(Blackwell Publishing Ltd, 2021)The escalating prevalence of male infertility and decreasing trend in sperm quality have been correlated with rapid industrialisation and the associated discharge of an excess of synthetic substances into the environment. ... -
Environmental flow assessments are not realizing their potential as an aid to basin planning
(Frontiers Media, 2018)Multiple planned dams in developing countries, mostly for hydropower, are threatening some of the world’s great river systems. Concern over their social and environmental impacts has led to hydropower being excluded from ... -
Environmental response and ph tolerance of induced co2 in ulva rigida c.agardh, 1823(Chlorophyta) under controlled conditions
(PAS FORUM, 2022)The increase in integrated multitrophic aquaculture (IMTA), where seaweed (particularly Ulva rigidaC.Agardh, 1823) is used as a feedstock and a wastewater scrubber in South African IMTA systems, has necessitated research ... -
Environmental responses of jellyfish polyps as drivers of medusa populations off the coast of Namibia
(National Inquiry Services Centre, 2018)Jellyfish populations in the southeastern Atlantic off the coast of Namibia have increased subsequent to the decline of small pelagic fisheries at the end of the 1960s, although the environment there has also become warmer ...