Browsing Faculty of Natural and Agricultural Sciences by Title
Now showing items 934-953 of 4820
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Cr(VI) and conductivity as Indicators of surface water pollution from ferrochrome production in South Africa: four case studies
(Springer, 2015)South Africa is one of the largest ferrochromium (FeCr) producers. Most FeCr is exported to developed countries. Therefore the impact of this industry is of national and international importance. Cr(VI) and conductivity ... -
Cr(VI) formation during ozonation of Cr-containing materials in aqueous suspension: implications for water treatment
(WRC, 2012)Ozonation, or advanced oxidation processes (utilising ozone decomposition products as oxidants) are widely used in industrial wastewater and drinking water treatment plants. In these applications the use of ozone is based ... -
Cr(VI) generation during flaring of CO-rich off-gas from closed ferrochromium submerged arc furnaces
(Springer, 2015)Ferrochromium (FeCr) is the only source of new Cr units used in stainless steel production, which is a vital modern day alloy, making FeCr equally important. Small amounts of Cr(VI) are unintentionally formed during several ... -
Cr(VI) generation during sample preparation of solid samples - a chromite ore case study
(WRC, 2010)South Africa holds more than 70% of the world's viable chromite ore reserves and produces ~46.2% of the world's high carbon ferrochrome. It was recently reported that beneficiated South African chromite ores contained ... -
A Crank-Nicolson finite difference approach on the numerical estimation of rebate barrier option prices
(Taylor & Francis, 2019)In modelling financial derivatives, the pricing of barrier options are complicated as a result of their path-dependency and discontinuous payoffs. In the case of rebate knock-out barrier options, discount factors known ... -
Craspedostauros alatus sp. nov., a new diatom (Bacillariophyta) species found on museum sea turtle specimens
(Taylor & Francis, 2018)Several populations of a new Craspedostauros species were observed on museum specimens of juvenile green turtle and Kemp’s ridleys collected from Long Island Beach, New York, USA. The new taxon, Craspedostauros alatus ... -
The creation of rural child-friendly spaces: a spatial planning perspective
(Springer, 2019)The importance of child-friendly spaces is well captured in literature. Despite this, child-friendly spaces are a scare commodity in modern environments, especially when considering rural environments. These rural areas ... -
The creation of synthetic digital ground-truth images of historic cosmic ray data recordings
(Springer, 2017)The aim of this paper is to develop a set of algorithms for the automated construction of synthetic digital ground truth images from historic cosmic ray recordings. These images can subsequently be used to test data ... -
Credit price optimisation within retail banking
(Operations Research Society of South Africa, 2014)The willingness of a customer to pay for a product or service is mathematically captured by a price elasticity model. The model relates the responsiveness of customers to a change in the quoted price. In addition to ... -
A critical analysis of government spending on sport : mass participation and school allocation : sport administration
(AFAHPER-SDLAM PublicationsAJOLSabinet, 2014)The government plays an important role in promoting and financing sport. The government therefore needs to budget for the activities it finances. The purpose of the study was to critically analyse government spending on ... -
Critical attributes of sustainability in higher education: a categorisation from literature review
(Elsevier, 2016)Sustainability in Higher Education has been investigated mainly through examining institutional approaches, curricula content, or students' and teachers' perceptions of sustainability in practice. However, a deep ... -
Critical difference and biological variation in biomarkers of oxidative stress and nutritional status in athletes
(Public Library of Science, 2016)The longitudinal monitoring of oxidative stress (OS) in athletes may enable the identification of fatigued states and underperformance. The application of OS biomarker monitoring programs in sport are hindered by reliability ... -
Critical elements in implementing fundamental change in public environmental policy: Western Australia’s mine closure and rehabilitation securities reform
(Taylor & Francis, 2016)Development of public policy is a key role of government. Following the framework for Australian governments to uphold when developing public policy alone will not guarantee good policy development. This research critically ... -
A critical review of the Basel margin of conservatism requirement in a retail credit context
(Clute Institute, 2017)The Basel II accord (2006) includes guidelines to financial institutions for the estimation of regulatory capital (RC) for retail credit risk. Under the advanced Internal Ratings Based (IRB) approach, the formula suggested ... -
A critical review of the occurrence of perfluoroalkyl acids in aqueous environments and their removal by adsorption onto carbon nanotubes
(Springer, 2018)The presence of perfluoroalkyl acids (PFAAs) in aquatic environments is a cause of concern, due to their toxicity, possible ecological impact and adverse effects in man. The release of these pollutants into receiving water ... -
A critical social research perspective on self-directed learning and information technology practitioners
(WASET, 2012)Information systems practitioners are frequently required to master new technology, often without the aid of formal training. They require the skill to manage their own learning and, when this skill is developed in their ... -
A critical systems perspective on research methodology for research in e-learning in information systems classes
(ISSS, 2014)The aim of this paper is to provide a critical systems thinking perspective on e-learning research in information systems classrooms. Many higher education practitioners are under pressure from their institutions to do ... -
A critical systems thinking approach to empower refugees based on Maslow's theory of human motivation
(Wiley, 2019)The life of a refugee is hard. We show how Maslow's theory of motivation can be utilized to better understand the situation of refugees in the Netherlands. Our aim is to formulate guidelines for the authorities in terms ... -
Critical thinking perspectives on work integrated learning in information systems education
(WASET, 2012)Students with high level skills are in demand, especially in scare skill environments. If universities wish to be successful and competitive, its students need to be adequately equipped with the necessary tools. Work ... -
Crop rotation sequencing to minimize yield losses of summer-irrigated lowland rice in Myanmar caused by the rice root-knot nematode Meloidogyne graminicola
(Taylor & Francis, 2020)The effect of different rice-based crop rotation sequences on the population densities of Meloidogyne graminicola and on the yield of rice was evaluated in a microplot experiment under lowland rice field conditions. Ten ...
