Browsing Research Output by Title
Now showing items 1823-1842 of 13384
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Coal particle and bed physical transformational behaviour after thermochemical conversion in a fixed bed
(Elsevier, 2016)This paper examines the physical transformational behaviour that coal particles and the bed structure undergo in a fixed bed reactor. The transient overfeed configuration is used with feed gas entering from the bottom of ... -
Coal particle chemical transformational behaviour after thermochemical conversion in a fixed bed
(Elsevier, 2016)This paper examines the chemical transformational behaviour that coal particles undergo during conversion in deep packed beds, typically found in industrial combustion and gasification operations. Experiments were performed ... -
Coal power plant wastewater treatment by thermal and membrane technologies
(Wiley, 2019)Abstract This chapter contains sections titled: Introduction -- Mineral Scale Formation -- Scale Formation Mechanisms -- Scale Inhibition Mechanisms -- Characteristics of Anti‐Scaling Agents -- Principles of ... -
Coal product moisture control using stockpiles
(Springer, 2016)The moisture content of product coal is a major factor influencing the efficiency of downstream coal utilization processes. Product stockpiles are often used as a control measure to regulate the moisture content of the ... -
Coal reactivity and selection for solid-based pre-reduction of sponge iron
(Taylor & Francis, 2020)Solid-based direct reduction of iron ore requires the reductant coal to have a suitable CO2 reactivity to achieve optimum pre-reduction within a rotary kiln. The CO2 reactivity is affected by numerous factors including ... -
Coal science de-sulfurization of some brazilian power-coals by low energy ultrasonication
(Swanson School of Engineering, Univ of Pittsburgh, 2015) -
Coal utilization in an uncertain economic world: a South African perspective
(Swanson School of Engineering, Univ of Pittsburgh, 2015) -
Coal-based reducing agents in ferroalloys and silicon production
(Elsevier, 2019)Manganese, chromium, and silicon ferroalloys are typical examples of alloys that are produced using carbon materials to remove oxygen from the raw materials. A majority of such alloys are currently produced in electric ... -
Coal-derived low smoke fuel assessment through coal stove combustion testing
(Elsevier, 2017)A study was undertaken to investigate the production of low smoke fuel from coal currently used in low-income households in South Africa. Pyrolysis of large coal lumps was studied as a possible production method, and an ... -
Coarse-grained molecular dynamics (CG-MD) simulation of the encapsulation of dexamethasone in PSS/PDDA layer-by-layer assembled polyelectrolyte nanocapsules
(Springer, 2020)Experimental studies have reported the fundamental and applied science aspects of polyelectrolyte (PE) layer-by-layer (LbL) self-assembly. LbL nanocoating is a simple and robust technique that can be used to modify the ... -
Cocoa farmers' safety perception and compliance with precautions in the use of pesticides in centre and western Cameroon
(AEER, 2017)Although pesticides are necessary inputs in cocoa production, inability of farmers to comply with safety precautions poses significant threat to their health and sustainable cocoa production in Cameroon. This paper analyzed ... -
Cocrystals of the antimalarial drug 11-azaartemisinin with three alkenoic acids of 1:1 or 2:1 stoichiometry
(IUCr, 2018)The stoichiometry, X-ray structures and stability of four pharmaceutical cocrystals previously identified from liquid-assisted grinding (LAG) of 11-azaartemisinin (11-Aza; systematic name: 1,5,9-trimethyl-14,15,16-triox ... -
Code-switched English pronunciation modeling for Swahili spoken term detection
(Procedia Computer Science: Spoken Language Technology for Under-resourced Languages, 2016-05)We investigate modeling strategies for English code-switched words as found in a Swahili spoken term detection system. Code switching, where speakers switch language in a conversation, occurs frequently in multilingual ... -
Code-to-code comparison for analysing the steady-state heat transferand natural circulation in an air-cooled RCCS using GAMMA+ and Flownex
(Elsevier, 2015)The GAMMA+ and Flownex codes are both based on a one-dimensional flow network modelling approach and both can account for any complex network of different heat transfer phenomena occurring simultaneously. However, there ... -
Coding and data analysis during qualitative empirical research in Practical Theology
(AOSIS, 2015)I dedicate this article to Prof. George Lotter, who has been instrumental in the formation of more than 90 postgraduate students in practical theological studies at the North-West University (NWU). Under his guidance, a ... -
Coexisting conditions among children and adolescents with cancer in a section of the South African private health sector: perspectives from drug utilization data
(Atlantis Press, 2020)Coexisting conditions are relatively common in children with cancer, however, there is a paucity of information on the prevalence of coexisting conditions in children with cancer in South Africa. This cross-sectional study ... -
Cognition and context in translation analysis: Contextual frames of reference in Bible translation
(Scriptura, 2014)This article describes the concept of contextual frames of reference (CFR) and explains its importance to the analysis of Bible translations. The article starts by explaining the idea of cognition, which is fundamental to ... -
A cognitive metaphorical approach to Genesis 29:7 and a suggested translation
(Institute for Afro-Hellenic Studies & University of Johannesburg, 2012)The translation of the Hebrew phrase צוֺד הַיּוֹם נָּדֺוֺל (literally "the day is still big") in Genesis 29:7 in the Hebrew Bible is shown to be problematic in the large variety of translations that exist for this phrase. In ... -
The cognitive/affective distinction of job insecurity: validation and differential relations
(Unisa, 2013)Job insecurity as a work-related stressor is well established through three decades of research. It has been related to outcomes such as decreased job satisfaction, organisational commitment and performance as well as ... -
The cognitive/affective distinction of job insecurity: validation and differential relations
(Unisa Press, 2013)Job insecurity as a work-related stressor is well established through three decades of research. It has been related to outcomes such as decreased job satisfaction, organisational commitment and performance as well as ...