Browsing Faculty of Natural Sciences by Title
Now showing items 2224-2243 of 2571
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Statistical gamma-ray decay studies at iThemba LABS
(EDP Sciences, 2017)Abstract. A program to study the γ -ray decay from the region of high-level density has been established at iThemba LABS, where a high-resolution gamma-ray detector array is used in conjunction with silicon particle-telescopes. ... -
Statistical recovery of 21 cm visibilities and their power spectra with gaussian-constrained realizations and gibbs sampling
(The Astrophysical Journal Supplement Series, 2023)Radio interferometers designed to probe the 21 cm signal from Cosmic Dawn and the Epoch of Reionization must contend with systematic effects that make it difficult to achieve sufficient dynamic range to separate the 21 cm ... -
Statistical recovery of the BAO scale from multipoles of the beam-convolved 21 cm correlation function
(Royal Astronomical Society, 2021)Despite being designed as an interferometer, theMeerKAT radio array (a Square Kilometre Array pathfinder) can also be used in autocorrelation (‘single-dish’) mode, where each dish scans the sky independently. Operating ... -
Statistical testing of input factors in the carbonation of brine impacted fly ash
(Taylor & Francis, 2012)A D-optimal design was applied in the study of input factors: temperature, pressure, solid/liquid (S/L) ratio and particle size and their influence on the carbonation of brine impacted fly ash (FA) determined. Both ... -
Statistical tests for changes in the amplitude, frequency or phase of a sinusoidal variation
(Oxford University Press, 2009)The problem considered is that of testing for small changes over time in the properties of a sinusoidal signal contaminated by noise. Two test statistics are proposed. The first is a frequency domain statistic based on ... -
Status of sperm functionality assessment in wildlife species: From fish to primates
(2021-05)(1) Background: in order to propagate wildlife species (covering the whole spectrum from species suitable for aquaculture to endangered species), it is important to have a good understanding of the quality of their sperm, ... -
Steady‐state population pharmacokinetics of terizidone and itsmetabolite cycloserine in patients with drug‐resistanttuberculosis
(Wiley, 2019)Despite terizidone being part of the second‐line recommended drugs fortreatment of drug‐resistant tuberculosis (DR‐TB), information on its pharmacokineticsis scarce. The aim of this study was to describe the steady‐state ... -
Stochastic modeling of a mosquito-borne disease
(Springer Nature, 2020)We present and analyze a stochastic differential equation (SDE) model for the population dynamics of a mosquito-borne infectious disease. We prove the solutions to be almost surely positive and global. We introduce a ... -
A stochastic population model of cholera disease
(American Institute of Mathematical Sciences, 2022-02)A cholera population model with stochastic transmission and stochasticity on the environmental reservoir of the cholera bacteria is presented. It is shown that solutions are well-behaved. In comparison with the underlying ... -
A stochastic TB model for a crowded environment
(Hindawi, 2018)We propose a stochastic compartmental model for the population dynamics of tuberculosis. The model is applicable to crowded environments such as for people in high density camps or in prisons. We start off with a known ... -
Strategies for information management in education: some international experience
(AOSIS Open Journals, 2013)Background: Recent analysis of the management of information and communications technologies in South African education suggests strongly that there is only limited strategic thinking that might guide policy-makers, school ... -
Strategies for malaria vaccination during the Covid-19 pandemic in African countries
(World Health Organization, 2022)Since October 2021, the World Health Organization (WHO) recommends the use of RTS,S/AS01 (RTS,S) malaria vaccine for children in areas of moderate to high transmission of Plasmodium falciparum in Africa.1 The vaccine ... -
Strength estimation of evaporitic rocks using different testing methods
(SpringLink, 2019)Rock strength is defined as the limit of the ability of a rock to resist stress or deformation without breaking. Testing methods recommended by ISRM (International Society of Rock Mechanics) and ASTM (American Standards ... -
Strength estimation of evaporitic rocks using different testing methods
(Springer, 2019)Rock strength is defined as the limit of the ability of a rock to resist stress or deformation without breaking. Testing methods recommended by ISRM (International Society of Rock Mechanics) and ASTM (American Standards ... -
Strengths and limitations of different Chromogenic Media for the identification of Candida species
(Scientific & Academic Publishing, 2012)The treatment of invasive candidiasis and other Candida infections with the appropriate antifungal agent is assisted by the identification of Candida isolates to the species level. Rapid and accurate methods of differentiation ... -
Stress modulation as a means to improve yeasts for lignocellulose bioconversion
(Springer, 2021)The second-generation (2G) fermentation environment for lignocellulose conversion presents unique challenges to the fermentative organism that do not necessarily exist in other industrial fermentations. While extreme ... -
Structural analysis, molecular modelling and preliminary competition binding studies of AM-DAN as a NMDA receptor PCP-Site fluorescent ligand
(MDPI, 2019): Excitotoxicity related to the dysfunction of the N-methyl-d-aspartate receptor (NMDAR) has been indicated to play an integral role in the pathophysiology of multiple disease states, including neurodegenerative disorders ... -
Structural analysis, molecular modelling and preliminary competition bnding studies of AM-DAN as a NMDA Receptor PCP-Site Fluorescent Ligand
(MDPI, 2019)Excitotoxicity related to the dysfunction of the N-methyl-d-aspartate receptor (NMDAR) has been indicated to play an integral role in the pathophysiology of multiple disease states, including neurodegenerative disorders ... -
Structural and molecular docking analytical studies of the predicted ligand binding sites of cadherin-1 in cancer prognostics
(Dove Medical Press, 2020)Several studies have explored the design of antimicrobial peptides (AMPs) for the development of therapeutic and diagnostic molecules for the treatment and identification of pathogenic diseases as well as cancer. Human ... -
Structural comparison of diverse HIV-1 subtypes using molecular modelling and docking analyses of integrase inhibitors
(MPDI, 2020)The process of viral integration into the host genome is an essential step of the HIV-1 life cycle. The viral integrase (IN) enzyme catalyzes integration. IN is an ideal therapeutic enzyme targeted by several drugs; ...