Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 389-408 of 4818
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Banking regulations: an examination of the failure of African Bank using Merton’s structural model
(AOSIS, 2017)The business of banking involves the taking of deposits and the making of loans. Banking balance sheets are typically highly leveraged, with equity capital generally dwarfed by debt capital. Banks are ... -
Baroreceptor sensitivity, cardiovascular responses and ECG left ventricular hypertrophy in men: the SABPA study
(Taylor & Francis, 2011)Aim. Research has shown a significant relationship between hypertension and attenuated baroreceptor sensitivity (BRS), which in turn reflects alterations of autonomic control of the cardiovascular system. The objective of ... -
Baseline bio-accumulation concentrations and resulting oxidative stress in Synodontis zambezensis after an acute laboratory exposure to 4,4′-DDT
(Elsevier, 2019)The use of 1,1′-(2,2,2-Trichloro-1,1-ethanediyl)bis(4-chlorobenzene) (DDT) as a pesticide for the control of insects vectors responsible for the spread of many life threatening diseases was officially banned in 1972 by the ... -
Baseline status of microbial activity on gold tailings facilities in South Africa
(Elsevier, 2018)In many ways, South Africa’s landscape has been dominated by mining, given that, for so many years this sector has been the mainstay of the South African economy. As such the environmental impacts of these mining activities ... -
Basic characteristics of atmospheric particles, trace gases and meteorology in a relatively clean Southern African Savannah environment
(EGU, 2008)We have analyzed one year (July 2006–July 2007) of measurement data from a relatively clean background site located in dry savannah in South Africa. The annualmedian trace gas concentrations were equal to 0.7 ppb for SO2, ... -
Batrachochytrium dendrobatidis in amphibians of Cameroon, including first records for caecilians
(Inter Research, 2013)Amphibian chytrid fungus Batrachochytrium dendrobatidis (Bd) has been hypothesised to be an indigenous parasite of African amphibians. In Cameroon, however, previous surveys in one region (in the northwest) failed to ... -
Bayesian inference for radio observations
(Oxford University Press, 2015)New telescopes like the Square Kilometre Array (SKA) will push into a new sensitivity regime and expose systematics, such as direction-dependent effects, that could previously be ignored. Current methods for handling such ... -
Bäcklund transformation, multiple wave solutions and lump solutions to a (3 + 1)-dimensional nonlinear evolution equation
(SpringerSpringer, 2017)In this paper, a (3+1)-dimensional nonlinear evolution equation is cast into Hirota bilinear form with a dependent variable transformation. A bilinear Bäcklund transformation is then presented, which consists of six bilinear ... -
Beetroot juice is more beneficial than sodium nitrate for attenuating muscle pain after strenuous eccentric-bias exercise
(Canadian Science Publishing, 2017)The aim of this study was to compare the effects of beetroot juice (BTJ) and a nitrate only drink (sodium nitrate; SN) on indices of exercise-induced muscle damage (EIMD). Thirty recreationally active males consumed either ... -
A behavioral analysis of KdVB equation under the law of Mittag-Leffler function
(Elsevier, 2019)The literature on fluid dynamics shows that there still exist number of unusual irregularities observed in wave motions described by the Korteweg–de Vries equation, Burgers equation or the combination of both, called ... -
Behaviour and biology of Chilo partellus on maize landraces
(Wiley-Blackwell, 2014)Plants defend themselves against herbivores through activation of both constitutive and induced defences. Previous studies reported that egg deposition on maize landraces induces the release of volatiles that attract ... -
Behavioural response as a reliable measure of acute nanomaterial toxicity in zebrafish larvae exposed to a carbon-based versus a metal-based nanomaterial
(Taylor & Francis, 2020)Production, use and disposal of products containing nanomaterials can lead to an increased presence of these particles in the environment and exposure to the organisms found there. It is therefore becoming increasingly ... -
Behavioural threshold analysis: methodological and practical considerations for applications in information security
(Taylor & Francis, 2019)The application of behavioural threshold analysis to analyse group behaviour in information security presents a unique challenge in terms of the measurement instruments and methodology used to gather relevant attitude data. ... -
Behavioural thresholds in the context of information security
(HAISA, 2016)This research presents the exploratory application of behavioural threshold theory on group behaviour related to information security. Behavioural threshold analysis is presented as a possible tool for aiding the development ... -
Benchmarking for ray tracing performance measurement
(IBIMA, 2010)During the past thirty years, researchers have greatly sped up the naïve ray tracing algorithm. However, the methods used to measure and compare their diverse algorithms have remained ad-hoc. This makes it difficult to ... -
Benders decomposition of the passive optical network design problem
(Elsevier, 2016)Similar to the connected facility location problem, the passive optical network design problem requires the search for a subset of deployed distribution points (splitters) as well as an allocation of demand points (optical ... -
Beneficial nematodes as bioindicators of ecosystem health in irrigated soils
(Elsevier, 2018)Irrigated crop production, which accounts for 40% of global produce, is threatened by the deterioration of freshwater resources as a result of pollution originating from anthropogenic activities. While the effects of ... -
The benefits of segmentation: evidence from a South African bank and other studies
(ASSAf, 2017)We applied different modelling techniques to six data sets from different disciplines in the industry, on which predictive models can be developed, to demonstrate the benefit of segmentation in linear predictive modelling. ... -
Benjamin–Bona–Mahony equation with variable coefficients:conservation laws
(MDPI, 2014)This paper aims to construct conservation laws for a Benjamin–Bona–Mahony equation with variable coefficients, which is a third-order partial differential equation. This equation does not have a Lagrangian and so we transform ...