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Assessing the potential role of microorganisms in the production of seedlings for the restoration of Albany Thicket

  • Authors: Mpama, Nelisa
  • Date: 2017
  • Subjects: Vesicular-arbuscular mycorrhizas , Rhizobacteria , Restoration ecology South Africa Albany , Microorganisms
  • Language: English
  • Type: Doctoral theses , text
  • Identifier: http://hdl.handle.net/10962/64555 , vital:28558
  • Description: The role of microorganisms in restoration of the Albany Thicket has not been well documented, although the benefits to plants of these various interactions has been well documented. Microorganisms are chief ecological engineers and assist in resolving environmental problems and act to restore degraded ecosystem function by forming mutual relationships with the roots of the plants. The aim of this study was to assess the potential of microorganisms for the improved biomass production of selected woody and succulent seedlings used in mesic thicket restoration. Three tree species were selected for propagation in this study namely; Mystroxylon aethiopicum Scutia myrtina and Aloe ferox. Soil samples were collected from a degraded and intact thicket site from Bathurst, South Africa. Soils were evaluated for number of arbuscular mycorrhizal (AM) spores, mycorrhizal infectivity potential and nutrient availability both before and after seedling propagation. Pasteurized soil from the degraded site was used in a pot trial. Ten replicates seedling for plant species were planted and subjected to four treatments which included inoculation with AM fungi and the rhizobacterium, Enterobacter sp., alone and in combination; the fourth treatment was an un-inouclated control. Plant growth parameters were recorded at regular intervals where appropriate and seedlings were harvested after 24 weeks for biomass measurements and AM colonisation assessments. Although generally low (< 1 spore per gram) the density of AM fungal spores was significantly higher in soils from the intact site when compared with soils from the degraded site. The mycorrhizal potential of the soils was however not significantly different. Mystroxylon aethiopicum seedling shoot height, canopy diameter and shoot biomass showed a significant increase when inoculated with AM fungi while S. myrtina seedlings showed increased shoot height when inoculated with both AM fungi and Enterobacter sp. Aloe ferox seedlings did not respond to microbial inoculation. The concentration of soil P and Na increased in treatments with Enterobacter sp. alone and in combination with AM fungi. Mystroxylon aethiopicum and S. myrtina seedlings showed a dependency on microbial inoculants indicating the importance of inoculation in the nursery before planting out into the field. Overall AM fungal inoculants applied to seedlings can be used to compensate for nutrient deficiency in soils. Although the Enterobacter isolate used was known to have various plant growth promoting capabilities. It is recommended that other rhizobacterial isolates be investigated. , Thesis (MSc) -- Faculty of Science, Environmental Science, 2017
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  • Date Issued: 2017

The relevance of integrated reporting for companies to attract investors within the construction sector in the KZN region

  • Authors: Ebrahim, Shanaaz
  • Date: 2017
  • Subjects: Financial statements Investments , Construction industry -- Finance Corporations -- Accounting
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: http://hdl.handle.net/10948/15545 , vital:28268
  • Description: Since the global financial crisis of 2008, attracting investment in a public company has not been a simple task (Krzus, 2011). Public trust in organisations was lost as a result of the crisis, owing to the lingering economic uncertainties that prevailed (Krzus, 2011). Through the full disclosure of all aspects that affect the operations of an entity, investors will be assisted in making an informed decision prior to making an investment in a publicly traded company (Singh, Wei, & Kaur, 2012). Integrated reporting provides investors with the necessary details, by making full disclosure of all aspects that affect the operations of an entity, including both financial and non-financial information, in a single report. Such information will enable investors to make a more informed assessment of the future prospects of the organisation in which they intend to invest (Singh et al., 2012). The purpose of this research effort, therefore, was to determine the relevance of integrated reporting to professional investors when making investment decisions, focusing specifically on JSE-listed construction companies. Grounded theory was used as a research design method. Grounded theory summarises data collected from empirical sources into categories. The data collected were based on the subjective perceptions of the participants in response to investigative interview questions. The researcher focused on a single context, namely an investment made by professional investors in JSE-listed construction companies within the Durban metropolitan in KZN. Non-probability, purposive sampling was used as the findings were not generalised to the entire population but were limited to the opinions and perceptions of professional investors in the Durban metropolitan area. The research effort resulted in valuable insight into how integrated reporting can be a useful decision-making tool for professional investors when undertaking investment in listed construction companies, in an attempt to attract investment in the sector. The researcher experienced a lack of responses from professional investors within the industry who were contacted for interviews. This lack of response could be considered to be a limitation in validating the outcome of the study. “Investors and integrated reporting” was identified as a theme that is material to the current state and potential future development of integrated reporting. Accordingly, this theme was used as a basis for this research effort that will enhance companies’ awareness of the benefits of compiling integrated reports as a tool to attract investors. This will assist in obtaining finance that can be used to develop and grow organisations.
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  • Date Issued: 2017

Effects of symmetry and the number of positive charges on the photocatalytic activity of indium phthalocyanines when embedded in electrospun fibers

  • Authors: Chakona, Gamuchirai , Nyokong, Tebello
  • Date: 2017
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/188304 , vital:44743 , xlink:href="https://doi.org/10.1016/j.ica.2016.12.025"
  • Description: Photooxidations of bisphenol A and 4-chlorophenol were carried out in this study using two asymmetric indium(III) phthalocyanines photosensitizers: the first consisting of one quaternized 4-pyridyloxyl and no other substituents (complex 1) and the second containing three quaternized 4-pyridylsulfanyl units and one aminophenoxy (complex 3). The asymmetry of complex 3 is additionally caused by the presence of two linking atoms (O and S). The symmetrically substituted indium(III) phthalocyanine containing four quaternized 4-pyridyloxyl units (complex 2) was also studied. The complexes were embedded in electrospun polystyrene fiber for heterogeneous photocatalytic transformation of 4-chlorophenol and bisphenol A. When immobilized on electrospun fibers, complexes 1, 2 and 3 gave singlet oxygen values of 0.31, 0.39 and 0.50 in water, respectively. Complex 3 showed the best photocatalytic behavior with observed rate constants of 2.8 × 10−3 min−1 for bisphenol A and 3.8 × 10−3 min−1 for 4-chlorophenol.
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  • Date Issued: 2017

Evaluation of groundwater potential using neotectonics and geophysics in the context of post Karoo tectonic framework around Fort Beaufort and Smithfield, Eastern Cape, South Africa

  • Authors: Ndlovu, Nkosilathi
  • Date: 2017
  • Subjects: Neotectonics -- South Africa -- Eastern Cape Groundwater -- South Africa -- Eastern Cape Geophysical surveys -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10353/12687 , vital:39299
  • Description: Geological and geophysical methods were used to investigate the Karoo area extending from longitudes 25.50 E to 27.50 E and latitudes 300 S to 330 S in South Africa, particularly Fort Beaufort, Aliwal North, Venterstad and Smithfield. The geology of the area is dominated by the upper Beaufort Group (Adelaide Subgroup) with an extensive network of dolerite sills and dykes that intruded the sedimentary sequence. A relationship between neotectonics, post-Karoo tectonics, groundwater and lithology was investigated to locate suitable groundwater potential sites. Apart from studying the role of neotectonics and the post Karoo tectonics, this research aims at generating groundwater targets to alleviate water shortages mainly for farming and livestock, and prove that neotectonics is still active. Methodologies adopted for obtaining these results included a comprehensive literature review, thin section analysis, scanning electron microscopy, geophysical investigation (magnetic, gravity, and vertical electrical sounding), and the application of Geographical Information Systems (GIS) and remote sensing. Twenty samples were collected at various locations within the study area and were analyzed using the petrographic microscope while others were analyzed with the Scanning Electron Microscopic (SEM) combined with an Energy dispersive x-ray spectrometry. The results show that the rocks are fractured, porous and have variable mineralogy (presence of heavy minerals) within the rocks. The use of Geographical Information Systems (GIS) and remote sensing in geological surveys, especially hydrogeology, has gained momentum over the past few years. This research is no exception as ArcMap software was used to create a map of seismic epicentres of the Eastern Cape Province. From the map it can be observed that seismicity still occurs and thus leading to the notion of neotectonics being active. Lineaments were also automatically extracted using the ENVI 5.1 and Geomatica 2013 software. Lineaments are zones of weakness in the subsurface of the Earth and are very important in locating groundwater potential sites. Geophysical techniques are essential and highly accurate for groundwater studies. Gravity and magnetic techniques were applied on data which was supplied as grids. Analysis using Geosoft Oasis 8.3 revealed extensive lineaments and ring like patterns and these were inferred to be dolerite intrusions (sills and dykes). The morphology of the intrusions help in identifying possible groundwater potential zones and thus they should be investigated. Vertical electrical sounding (VES) technique using the Schlumberger array was carried out at three sites (Fort Beaufort fracture which is possibly related to Quaternary surface uplift of the Amatole-Swaziland axis, splay of the Fort Beaufort fracture and at a site which showed high groundwater potential) to explore subsurface layering. IP2win (lite), 1-D modelling software was used to model the apparent resistivity data to obtain the geoelectric parameters of the subsurface (thickness and resistivity). The VES results are consistent with fractured rocks that aid groundwater movement. The VES data for the three sites was further modelled by the RES2DINV software and this shows low resistivity values associated with loose, water saturated top sandy soil and higher resistivity values associated with sedimentary sequences and dolerite. Moreover, potential sites for citing wells are predicted to be between 79.5 and 128 m on the profile. Further neotectonic studies need to be done, especially on the quaternary sediments as they would have more neotectonic evidence. The use of geophysical techniques for groundwater search need to be intensified, with more emphasis being put to the sedimentary sequences bordered by dolerite intrusions and fractured zones.
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  • Date Issued: 2017

Nontsizi Mgqwetho’s the nation’s bounty: a prophetic voice towards an African literary theory

  • Authors: Nxasana, Thulani
  • Date: 2017
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/4547 , vital:20687
  • Description: This thesis seeks to examine the ways in which Africans and African scholarship in particular have relied on the West to lead the way in scientific inquiry, theory and ways of approaching literary texts thus the stunting effects of this in the growth and development of uniquely African literary scholarship and theorising. In his seminal work, Decolonising the Mind, Wa Thiong’o (1987a) stresses that “...how we view ourselves, our environment even, is very much dependent on where we stand in relationship to imperialism in its colonial and neocolonial stages; that if we are to do anything about our individual and collective being today, then we have to coldly and consciously look at what imperialism has been doing to us and to our view of ourselves in the universe” (Wa Thiong’o, 1987a, p.88). Although most African countries obtained their liberation decades ago, seemingly western cultural imperialism still dominates and plagues the African psyche; hence they largely look to the West and ways of the West for established and emergent theoretical conceptions. This thesis aims to interrogate popular western literary theories unquestioningly used to analyse African works, particularly feminism and post-colonial theory; furthermore, to show crucial factors not taken into account such as the evolving power dynamics in African societies, the role of the “sacred” or spirituality which often forms and informs the dynamics of the text, and lastly, based on the poetry of Nontsizi Mgqwetho, to advocate for the need for an African literary theory and put forward the essential tenets of such a theory. The poetry of Xhosa poet, Nontsizi Mgqwetho, is used to analyse the complexities and dynamics of African literary production written in African languages; her poetry is written in isiXhosa to a Xhosa audience, a far cry from the assumption that African literary texts are concerned with writing to the “centre” as post-colonial theorists claim. Her work explicitly provides Africans with an approach to overcome territorial and cultural imperialism; she sees within the African psyche and traditional values empowering modes of resistance against any type of domination and through her poetry illustrates meaningful ways that Africans can critically engage with and examine the positives and negatives of cultural exchange and or assimilation, and the effects thereof while at the same time remaining proudly Africa.
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  • Date Issued: 2017

Clusters as a vehicle for industrial development in the Eastern Cape

  • Authors: Mtati, Odwa
  • Date: 2017
  • Subjects: Industrial clusters -- South Africa -- Eastern Cape , Industrialization -- South Africa -- Eastern Cape , Industrial policy -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/7106 , vital:21235
  • Description: This study examines the cluster approach as a means for promoting industrial development in the Eastern Cape Province, Republic of South Africa. The Province is unevenly developed, with pockets that are well-integrated into the national and global economies, but with some areas being severely underdeveloped. However, the Province retains a high potential for industrial revitalisation and expansion. The option of applying the cluster approach, most closely associated with Michael Porter’s work, The Comparative Advantage of Nations, to unlock this potential is examined, with a particular focus on the factors affecting the efficiency of the cluster as a vehicle for promoting industrialisation. Existing works on success factors for clusters and comparative case studies are examined, while responses from a survey among provincial stakeholders on the adaptation of the cluster concept to the circumstances of the province are analysed. The study finds that the management of a cluster is critical to its success or demise. Further to this, the key role that exists for industry is in building inter-firm co-operation, improving government and business cooperation, skills development of local labour pools and facilitating interactions between buyers and sellers. While Government Policy is not always necessary for establishment of clusters, in the specific circumstances of the Eastern Cape, it is desirable due to underdevelopment in most regions. The case for introduction of a cluster policy is supported by global experiences with clusters. A cluster approach for promotion of industrialisation is therefore recommended for the Province, with steps that may be taken towards the formation of clusters suggested.
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  • Date Issued: 2017

The effects of the high rate of learner absenteeism in primary schools in Govan Mbeki area

  • Authors: Sigwanda, Pakama Sylvia
  • Date: 2017
  • Subjects: School children -- South Africa -- Mpumalanga -- Social conditions Right to education -- South Africa -- Mpumalanga , Children's rights -- South Africa -- Mpumalanga
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/20394 , vital:29274
  • Description: Since the advent of the democratic dispensation in 1994, the government of South Africa has made significant steps in addressing issues of national concern. One of the major highlights is a Bill of Rights, as stipulated in the South African Constitution, Act 106 of 1996, which states that every child has a right to basic education. However, in spite of compulsory education, an extremely high rate of absenteeism has been noticed in many primary schools of the Eastern Cape Province in the Nelson Mandela Metropolitan region. The purpose of this study was to develop a deeper understanding of the major factors that contribute to absenteeism in the Govan Mbeki area of the Nelson Mandela Metropolitan Region, with the ultimate aim of promoting school attendance among learners. Both quantitative and qualitative approaches were used to collect the data in two schools. Using purposive sampling, two schools in the Govan Mbeki area were identified. These two schools were known to have a high rate of learner absenteeism. In each of the schools – which, in this research, are referred to as school A and school B, 20 parents, 6 teachers and 20 learners (10 per school) were identified as participants. The major findings of this study show that the factors affecting school attendance are interlinked; and, they include – although they are not limited to – bullying, poverty in households, poor teacher-student relationships, a poor learning environment, and the underperformance of the learners, which, in turn, result in disinterested learners. The study recommends a joint engagement of school, homes and the Department of Education to develop mechanisms, which might help both parents and teachers to navigate potential solutions to curb the trend. Furthermore, there needs to be a concerted effort to reduce household poverty and to sensitize teachers of their responsibilities towards their learners.
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  • Date Issued: 2017

An assessment of the implementation of performance management and development system: Department of Sport and Recreation South Africa

  • Authors: Zinganto, Nobulali
  • Date: 2017
  • Subjects: Performance -- Management Local officials and employees -- South Africa , Employees -- Rating of -- South Africa Public administration --South Africa
  • Language: English
  • Type: Thesis , Masters , MPA
  • Identifier: http://hdl.handle.net/10948/45826 , vital:39220
  • Description: Performance management and development in the South African Public Service is a critical aspect that engenders officials and management to be committed to the provision of efficient and effective service delivery. The Public Service Regulations (2001) as amended requires all spheres of government to develop and implement policy parameters that address measurable service delivery aligned to their strategic functions. The imperatives of these policy parameters allow employees’ performance with notch increments. The National Department of Sport and Recreation South Africa (SRSA) developed a performance management system that links Employee Performance Management and Development System (EPMDS) at salary levels 5 – 12 to notch increments and Human Resource Development programmes. This system aims to achieve consideration of the desired outputs; meaning the delivery of work required, which is emphasised in the setting of objectives and looking at the necessary inputs; meaning the knowledge, skills, training and resources needed, which are considered in the appraisal and reviewing of the progress that was made. The performance of Sport and Recreation South Africa has not been commensurate with the aims and objectives of the EPMDS system, as the results are not yielding the best outcome on this system. This study sought to investigate whether the EPMDS contributes to improve performance of the employees and that of the entire organisation in SRSA. It would examine whether the employees do get feedback on their performance after the performance assessment period. The study would establish whether those employees who under-performed do get remedial interventions like training, coaching, mentoring and development on the competencies they lack; so that their performance is improved. The study also sought to determined the perception of the employees regarding the effectiveness of the Performance Management and Development System in SRSA Knowledge of employees' perceptions of the performance management system will assist management to implement such a system more effectively. The findings of this study indicate that managers use performance management as a tool to control and discipline subordinates, whilst subordinates use performance management as a means of getting extra money through performance bonuses. This could be the reason that performance assessment period is viewed as a period of high tension between supervisors and subordinates. The main recommendation on the basis of this finding is that there should be a regular and thorough training of officials at all levels within SRSA about the EPMDS and how it influences productivity. Other additional recommendations include, inter alia, that the identification of gaps on unsatisfactory performance should be made immediately after each performance period. Remedial interventions to address those gaps like training, retraining, coaching and counselling should be formulated, agreed upon and implemented.
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  • Date Issued: 2017

Perceptions regarding the impact of ubuntu and servant leadership on employee engagement in the workplace

  • Authors: Muller, Roger Joseph
  • Date: 2017
  • Subjects: Leadership Management -- South Africa , Management -- Africa -- Philosophy Employees -- Attitudes Organizational effectiveness -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: http://hdl.handle.net/10948/19409 , vital:28868
  • Description: South Africa have some of the lowest employee engagement scores in the world. Leadership is a key determinant of employee engagement, but existing leadership theories and practices are often ineffective in more humanistic and collectivistic cultures like South Africa. To this end, Ubuntu and servant leadership is posited to positively influence organisational performance by increasing employee engagement. The primary objective of this study is to investigate perceptions regarding the impact of Ubuntu and servant leadership on employee engagement in private organisations of the Eastern Cape. A quantitative research design was utilised and yielded 428 usable questionnaires through nonprobability sampling. The empirical results revealed that the spirit of solidarity dimension of Ubuntu leadership influenced significantly and positively. Furthermore, it was found that survival and spirit of solidarity had a significant and positive influence on organisational performance as measured through the balanced scorecard (BSC). Servant leadership positively and significantly influenced employee engagement and organisational performance. In addition, it was found that employee engagement mediates the relationship between servant leadership and organizational performance. This study has made several significant empirical and theoretical contributions, and can be classified as one of the pioneering attempts to gather empirical evidence on how Ubuntu manifests in the workplace. The high convergent validity of the dimensions of Ubuntu leadership and comparisons to Servant leadership established in this study, provides some proof of its novel contribution towards leadership theory. A highly reliable and valid measuring instrument was developed to evaluate Ubuntu from a leadership perspective. This is a major empirical contribution as, at the time, there were no reliable scales available in South Africa to measure Ubuntu leadership.
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  • Date Issued: 2017

Status of farm dwellers in the Great Kei municipality post implementation of the security tenure act

  • Authors: Mfeya, Nontando Hazel
  • Date: 2017
  • Subjects: Eviction -- South Africa -- Eastern Cape , Land tenure -- South Africa -- Eastern Cape Occupancy (Law) -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/14002 , vital:27381
  • Description: The period preceding and after the enactment of ESTA marks an increase in the difficulties faced by the farm dwellers in South Africa. They are still faced with illegal evictions. Their difficulties are marked with loss of land for food farming, loss of work, income and homes. Nevertheless, the introduction of ESTA in 1997 aimed at protecting and restoring the land rights of farm dwellers working on farms. Despite its existence there are still challenges of illegal evictions. This research focuses on difficulties faced by farm workers after the enactment of ESTA and investigate the process and effects of illegal evictions. The thesis adopts a qualitative research methodology that takes the form of a case study on two farms, Killarney farm and Shellford farm, where farm workers experienced evictions. The findings confirm that the farm workers are subject to illegal evictions. The evictions are due to the conversion of agricultural farms to game farming and also due to labour disputes. Poor living conditions are evident and farm owners conduct tacit evictions by imposing restrictions and threatening the farm workers who wish to stay on the farms. This thesis concludes by presenting suggestions that may restrict or put an end to illegal evictions. ESTA needs to be amended in order to ensure the security of farm workers who live on the farms.
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  • Date Issued: 2017

Using computer vision to categorize tyres and estimate the number of visible tyres in tyre stockpile images

  • Authors: Eastwood, Grant
  • Date: 2017
  • Subjects: Tires -- Specifications Tires -- Recycling , Tires -- Maintenance and repair
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10948/16022 , vital:28313
  • Description: Pressures from environmental agencies contribute to the challenges associated with the disposal of waste tyres, particularly in South Africa. Recycling of waste tyres in South Africa is in its infancy resulting in the historically undocumented and uncontrolled existence of waste tyre stockpiles across the country. The remote and distant locations of such stockpiles typically complicate the logistics associated with the collection, transport and storage of waste tyres prior to entering the recycling process. In order to optimize the logistics associated with the collection of waste tyres from stockpiles, useful information about such stockpiles would include estimates of the types of tyres as well as the quantity of specific tyre types found in particular stockpiles. This research proposes the use of computer vision for categorizing individual tyres and estimating the number of visible tyres in tyre stockpile images to support the logistics in tyre recycling efforts. The study begins with a broad review of image processing and computer vision algorithms for categorization and counting objects in images. The bag of visual words (BoVW) model for categorization is tested on two small data sets of tread tyre images using a random sub-sampling holdout method. The categorization results are evaluated using performance metrics for multiclass classifiers, namely the average accuracy, precision, and recall. The results indicated that corner-based local feature detectors combined with speeded up robust features (SURF) descriptors in a BoVW model provide moderately accurate categorization of tyres based on tread images. Two feature extraction methods for extracting features for use in training neural networks (NNs) for tyre count estimations in tyre stockpiles are proposed. The two feature extraction methods are used to describe images in terms of feature vectors that can be used as input for NNs. The first feature extraction method uses the BoVW model with histograms of oriented gradients (HOG) features collected from overlapping sub-images to create a visual vocabulary and describe the images in terms of their visual word occurrence histogram. The second feature extraction method uses the image gradient magnitude, gradient orientation, and edge orientations of edges detected using the Canny edge detector. A concatenated histogram is constructed from individual histograms of gradient orientations and gradient magnitude. The histograms are then used to train NNs using backpropogation to approximate functions from the feature vectors describing the images to scalar count estimations. The accuracy of visible object count predictions are evaluated using NN evaluation techniques to determine the accuracy of predictions and the generalization ability of the fit model. The count estimation experiments using the two feature extraction methods for input to NNs showed that fairly accurate count estimations can be obtained and that the fit model could generalize fairly well to unseen images.
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  • Date Issued: 2017

Factors influencing the shape of CW-OSL signal obtained by stimulation of very deep traps in carbon-doped aluminium oxide: an experimental study

  • Authors: Nyirenda, Angel N , Chithambo, Makaiko L
  • Date: 2017
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/115493 , vital:34149 , https://doi.org/10.1016/j.jlumin.2017.07.016
  • Description: The optically stimulated luminescence from carbon-doped aluminium oxide (α-Al2O3:C) displays a peak with time under certain measurement conditions. In this paper, we present factors that influence the peak-like shape of continuous-wave optically stimulated luminescence (CW-OSL) signal. The report is based on the experimental study of OSL signals obtained by stimulation of very deep traps in α-Al2O3:C. Methods exploiting post-irradiation annealing, variable dose and temperature dependent OSL measurements were used in the investigation. It is found that the rising part of the CW-OSL peak is obtained when the rate of retrapping at the most optically active trap (main trap) exceeds the rate of direct radiative recombination following optical release of charges from all optically active traps. This is possible if, during optical stimulation, the primary trap responsible for OSL i.e. the main trap, is substantially unoccupied and the very deep, donor traps are substantially filled up. The rate of charge retrapping itself is deduced to depend on the occupancy of the acceptor traps i.e. shallow, main and secondary traps; concentration of charge carriers in the very deep, donor traps; the post-irradiation annealing temperature and the temperature at which the OSL is measured.
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  • Date Issued: 2017

Indigenous and traditional musics in the school classroom : a re-evaluation of the South African Indigenous African Music (IAM) curriculum

  • Authors: McConnachie, Boudina
  • Date: 2017
  • Subjects: Ethnomusicology , Indigenous people -- Music , Music -- Instruction and study -- Africa , Music -- Instruction and study -- Curricula -- Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:21182 , http://hdl.handle.net/10962/6806
  • Description: Musical ideals set by European standards and values, entrenched through colonial oppression and promoted by the continued veneration of Western culture need to be re-evaluated. Despite the intention of the ANC government, through the Department of Basic Education's Curriculum and Assessment Policy Statement music curricula, to integrate Indigenous Knowledge and musics into the South African classroom, evidence shows that opportunities to do so are not seized. With reference to the proclaimed values of an African sensibility in the model of the South African music education curriculum, the history of its development and the current pedagogical movement towards transformation in the production of knowledge and the inclusion of Indigenous Knowledge (IK), this thesis questions why teachers in government schools in South Africa are not executing the Indigenous African Music (IAM) syllabus in the CAPS FET music curriculum. Taking the history of music education and the development of curriculum models and frameworks into account, it interrogates what strategies could improve the application of the current music curriculum in government schools in South Africa. These questions are addressed in the thesis by way of a discussion of the music curriculum and what its praxis in the classroom reveals about its efficacy, through observations and personal experiences, the observations of teachers and student teachers, a comparison with the experience in Zimbabwe, and an analysis of the music curriculum as it is currently devised and implemented. Straddling three methodological approaches, namely the ethnographic, the autoethnographic and the action research approach this study finds that the CAPS FET music curriculum does provide realistic opportunities to engage with African Indigenous and traditional music. This, however, is dependent upon the training of the teacher, facilities available in the classroom and the prior knowledge of the learner. A fundamental flaw of this curriculum is the approach to practical assessment of Indigenous and traditional African musics and the lack of assessment criteria and practical guidelines. In addition, the findings suggest that the fault regarding implementation of the curriculum lies in the training of students (who become teachers) at tertiary level, where an integrated approach to skills development regarding Indigenous African music is suggested.
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  • Date Issued: 2017

The impact of Retail Distribution Review (RDR) on the South African financial planning industry

  • Authors: Faul, Charmaine Hester
  • Date: 2017
  • Subjects: Financial planning industry -- South Africa Financial services industry -- South Africa , Financial services industry -- Law and legislation -- South Africa Corporate governance -- South Africa -- Finance
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: http://hdl.handle.net/10948/15193 , vital:28177
  • Description: The Retail Distribution Review (RDR) was introduced by the Financial Services Board (FSB) to change the distribution and remuneration practices in the financial services industry in an attempt to ensure that clients receive fair treatment when purchasing financial products. The FSB aims to ensure that clients are sold products which are suitable for their financial needs and objectives; that clients receive appropriate advice which is not biased and not subject to product supplier influence in particular and that there is full transparency in the sales process. The current distribution of financial products and some financial advisor remuneration models are noted as contributing factors to the poor outcomes of current product selling practices. The impact of RDR on the sustainability of the South African financial services industry and advisor force is expected to be substantial, especially in terms of advisor remuneration, the reduction in qualified experienced advisors and a growing advice gap. This study reviewed the research conducted in the UK and Australia where RDR has been implemented and the impact thereof on the financial planning industry in these countries. This study aimed to determine if the South African advisors have started changing their business models to ensure that they are ready for the implementation of RDR and to reduce the impact of RDR on their practices. An environmental scan was conducted in order to identify and understand other factors specific to the South African context which will impact the financial services industry in the future. Research was conducted via online questionnaires as well as personal interviews to determine the perception of clients pertaining to the trustworthiness and professionalism of financial advisors and what they perceive as value in terms of financial planning, their knowledge of RDR and the changing environment. Industry experts were given the opportunity to share their views regarding the impact of RDR on the industry as well as their proposals in terms of the implementation and roll-out of RDR.
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  • Date Issued: 2017

The medical profession and the universalisation of South African Health Care: analysing the response of Eastern Cape general practitioners to the National Health Insurance proposals

  • Authors: Hannah, Bridget
  • Date: 2017
  • Subjects: Health insurance -- South Africa , Health insurance -- Government policy -- South Africa , Medical care, Cost of -- South Africa , National health insurance -- South Africa , Medical policy -- South Africa , Physicians -- South Africa -- Attitudes
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10962/6075 , vital:21029
  • Description: In 2011, the Green Paper on National Health Insurance (NHI) in South Africa was released, committing the South African government to a 14-year plan to radically transform the currently inequitable health system towards providing comprehensive quality health care free at point of access to all citizens. The pursuit of universal health coverage (UHC) in South Africa forms part of a global aspiration to achieve more equitable healthcare delivery. One of the critical issues emerging from the Green Paper was how the NHI would be staffed. The NHI is unlikely to be adequately staffed without GPs but evidence suggests that private sector doctors have always been resistant to nationalisation or socialisation as a threat to their occupational power and professional status. The core work of this thesis is a study undertaken of 78 doctors in the Eastern Cape, focusing on private sector general practitioners (GPs), as the largest constituency of medical professionals in the country. The interview schedule was designed to gauge doctors' responses to the NHI, encourage discussion on their reactions to the reforms, and its implications in their view for private medical practice. The responses of the doctors are analysed through application of two theoretical themes, namely: (i) actor-centred policy creation, discussed through application of Walt and Gilson's (1994) shared focus on content, context, process and actors in the policy process, and (ii) the debate on medical professionalism, espoused by Freidson (1973, 1994) and argued against by Haug and Sussman (1969), and McKinlay (1972, 1993). Thus, if the process of policy making must take into account key actors in order to deliver a successful policy transition, what are the implications if these actors are actively excluded, or do not willingly cooperate? Does this indicate anything telling about the private sector's role to play in the pursuit of universal healthcare?
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  • Date Issued: 2017

The experiences of being trans-racially adopted: the voice of the adoptee

  • Authors: Bowen, Carrie
  • Date: 2017
  • Subjects: Interracial adoption -- South Africa Interethnic adoption -- South Africa , Adoption -- South Africa
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: http://hdl.handle.net/10948/14719 , vital:27831
  • Description: rans-racial adoption was first legalised in South Africa in 1991, and remains a contentious issue within a society in which the ramifications of apartheid are still felt. The study was borne of recognition of the need for clear understanding of the phenomenon of trans-racial adoption in the unique South African context, from the perspective of the adoptees themselves. The phenomenological approach was employed in this qualitative study, in order to gain an understanding of the meaning and sense that trans-racial adoptees ascribe to their lived experiences. The population for the study was trans-racially adopted individuals within South Africa, aged 18 years or older, who have been legally adopted during infancy or early childhood, after 1991. Snowball sampling was determined to be the most appropriate sampling method for the study. Individual, in-depth interviews were conducted with six trans-racial adoptees. These interviews were led by the question "Tell me the story of your experience of growing up as a trans-racially adopted child, and the meaning that this has for you?" The data collected through the interview process was analysed using thematic data analysis. The trustworthiness of the research process and findings was achieved through employing theoretically prescribed data verification strategies. The rich accounts offered by the participants provided insight into their experiences. The most significant study findings revealed that the participants experienced emotional security within their adoptive families, but encountered racism and discrimination within society. The findings further indicated that ambivalence developed during the process of identity formation. In making sense of their experiences, the participants reflected on their uniqueness and individuality, and highlighted gains related to their upbringing. It was evident that quality parental care and the participants’ own resilience contributed to their success in navigating these challenges. Based on the research findings, the study concluded with recommendations for enhancing outcomes in trans-racial adoption.
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  • Date Issued: 2017

Contextual factors influencing the use of learner-centred approaches in the teaching of home economics : a case of two universities in Zimbabwe

  • Authors: Motsi, Emily
  • Date: 2017
  • Subjects: Home economics -- Study and teaching (Higher) -- Zimbabwe Student-centered learning -- Zimbabwe
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10353/8463 , vital:32834
  • Description: This study examined contextual factors influencing the use of learner-centred approaches in the teaching of Home Economics in two universities in Zimbabwe. The sample consisted of eight students and four lecturers who were purposively sampled. The study was anchored in the interpretivist paradigm and it adopted a qualitative approach and case-study design. Data collection instruments consisted of structured in-depth interviews, observations and documents. Interviews were conducted with students and lecturers at their respective universities with observations and document analysis inter-spaced in between. Data analysis consisted of a thematic approach where common themes were identified in participants’ responses and analysed and discussed accordingly, with data from observed and documented analysis being used to buttress/refute observations made from the interviews. A number of findings emanated from the study. Students had varied conceptions of learner-centred approaches. Some viewed learner-centred approaches as methods of teaching that were participatory, while others viewed them as learning situations in which learners were actively engaged and developed specific capabilities such as problem-solving. Lecturers conceptualised learner-centred approaches as methods that led to active learner participation with the lecturer playing more of a facilitative role. The study revealed that contextual factors such as time available in each course, flexibility of content, the use of teaching methods characterised by active learner participation, the use of constructive and interactive learning activities, had facilitative as well as inhibiting influences on the use of learner-centred approaches. Social factors such as cooperativeness within the peer group, lecturer availability for consultations, technical staff support as well as structural factors such as the availability of textbooks and e-resources, provision of materials and tools, and access to the internet had a facilitative influence on use of learner-centred approaches. The main inhibitive structural factors were the absence of purpose-built facilities and limited space that caused overcrowding. University administration support for integration of learner-centred approaches was fairly evident in the two universities. To sustain the use of learner-centred approaches, lecturers required support through professional development. The study recommended that universities have well-articulated commitments to use learner-centred approaches through a Teaching and Learning Policy. Home Economics course designers should consider contextual factors in course design and course delivery to ensure effective implementation of learner-centred approaches in the teaching of the subject. Seminars and workshops should be organised by the University Teaching and Learning Centres to enhance the teacher educators’ knowledge on interactive teaching methodologies and strategies for creating student-centred learning environments.
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  • Date Issued: 2017

Chemical composition of leaf essential oils of Lantana camara varieties in South Africa and their effect on the behavioural preference of Falconia intermedia

  • Authors: Ngxande-Koza, Samella W
  • Date: 2017
  • Language: English
  • Type: text , Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10962/4877 , vital:20739
  • Description: Lantana camara L. (Verbenaceae) is one the most problematic invaders in South Africa invading forest edges, sand dunes, and shorelines by forming impenetrable thickets. Lantana camara invasions degrade natural biodiversity, reduce the value of land and consequently it has been a target for biological control, over the last 50 years in South Africa. Studies that have reported on chemical profile of Lantana camara have been conducted around the world but not in South Africa. Hence, the first aim of the current study was to identify the chemical baseline of L. camara varieties in the Eastern Cape, South Africa. Recent studies have shown that feeding by one of the agents released against L. camara, Falconia intermedia (Distant) (Hemiptera: Miridae), induces anti-herbivory response through increased leaf toughness and trichome density. A preliminary study conducted also reported the production of volatile chemicals by one variety, Whitney Farm, due to feeding by the mirids. Therefore, the second aim was to determine the induced changes in chemical compounds of L. camara varieties after feeding by F. intermedia. A third aim was to determine the effect these chemical compounds have on the behaviour of F. intermedia. To identify the chemical baseline of L. camara varieties, the essential oils of four L. camara varieties (East London, Port Alfred, Whitney Farm and Heather Glen) were analysed using gas chromatography mass spectrometry (GC-MS) and that resulted to the identification of 163 constitutive and 75 induced chemicals across the varieties tested. Lantana camara varieties showed different chemical classes but were highly dominated by terpenes. A great variation in the number of constitutive chemical compounds was found in all the varieties. There were 56 constitutive chemical compounds in the Whitney Farm variety, 41 in the East London variety, 36 in the Heather Glen variety and 30 in the Port Alfred variety. The Whitney Farm variety had the highest number (22) of unique constitutive chemicals identified when compared with other varieties. This indicates the chemical distinctiveness of the Whitney Farm variety from the other varieties. In the varieties tested, there were common chemical compounds identified in constitutive and induced (discussed below) states of the plants such as caryophyllene, hexane, naphthalene, copaene and a-caryophyllene. Besides naphthalene, the majority of chemical compounds in South African L. camara varieties were similar to compounds that have been identified across the world, suggesting that they are closely related. The expression of naphthalene in these varieties may be due to changes in the chemicals expressed over evolutionary time as predicted by the Novel Weapons Hypothesis. Amongst the varieties, a great variation in chemical compounds and their concentrations was shown in the induced states of the plants. The concentration of constitutive caryophyllene ranged from (3.13 - 15.7) %, to (4.02 - 11.10) % after feeding. The concentration of constitutive hexane ranged from (6.13 - 71.19) %, to (33.3 - 75.8) % after feeding. The concentration of constitutive naphthalene ranged from (0.21 - 4.79) %, to (0.92 - 2.11) % after feeding. The concentration of constitutive copaene ranged from (0.57 - 1.57) %, to (1.20 - 2.72) %. Lastly, the concentration of constitutive a-caryophyllene ranged from (1.18 - 9.03) %, to (0.78 - 5.48) % after feeding. The changes in chemical concentrations in lantana varieties indicated that feeding by the mirid on L. camara varieties causes an induction by either reducing or increasing the chemical concentrations. To determine the effect of the identified compounds on the behaviour of F. intermedia adults, olfactometer bioassays were conducted using a Y-tube technique. A significantly higher proportion of F. intermedia were attracted to undamaged leaves over damaged leaves and purified air. Undamaged leaves attracted 52 % of F. intermedia from the East London variety, 62.5 % from the Port Alfred variety, 56 % from the Whitney Farm variety, 58 % from the Lyndhurst variety and 54.5 % from the Heather Glen variety in dual choice trials versus damaged leaves. Furthermore, a significantly higher proportion of F. intermedia were attracted to damaged leaves over purified air. Damaged leaves attracted 67 % of F. intermedia from the East London variety, 67 % from the Port Alfred variety, 65.9 % from the Whitney Farm variety, 65.3 % from the Heather Glen variety and 64.5 % from the Lyndhurst variety. Olfactometer bioassays were also conducted using purified standard compounds of four chemical compounds identified from essential oils, hexane was used as a positive control as it is reported to be an insect attractant in literature. Hexane was highly attractive to the mirids compared to three standard compounds caryophyllene, caryophyllene oxide and naphthalene at the rate of 80 %, 73 % and 80 %, respectively. The standard compounds tested against F. intermedia are major compounds contained by L. camara varieties and they have proven to have a repellent effect. This may indicate that after feeding by F. intermedia, the major compounds expressed by the plant varieties repel F. intermedia contributing to the invasiveness of this weed. The increased expression of hexane and caryophyllene after feeding may also indicate increased attraction to some insects, opening up the potential for third trophic level interactions in varieties where this is the case. This is the first study on the chemical composition of essential oils of L. camara in South Africa. Therefore, we recommend that where appropriate chemical profile studies of the invasive alien plants should be considered during host specificity testing, and the vital role of chemical compounds on agent-weed interactions must be taken into consideration with other factors before and after the biological control agents are released.
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  • Date Issued: 2017

A framework for m-voting implementation in South Africa

  • Authors: Mpekoa, Noluntu
  • Date: 2017
  • Subjects: Electronic voting -- South Africa Voting -- Technological innovations , Voting-machines -- South Africa -- Reliability Elections -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , DPhil
  • Identifier: http://hdl.handle.net/10948/19662 , vital:28927
  • Description: Voting enables certain formal decisions to be made through the participation of a given population; and it is the vital part of a democratic process. The method of voting used in South Africa (SA) today is derived from the Australian ballot system. This paper-based voting system, however, is slow, convoluted and inaccurate because of human errors; it is costly and largely inefficient. In the early 1900s, election officials overwhelmingly decided to use electronic voting (E-voting) systems to solve some of the problematic issues of paper-based voting systems. Mobile voting (M-voting) is a subset of E-voting; and it allows citizens to use their mobile phones to cast their votes. Very few countries have endeavoured to implement M-voting, in order to improve mobility and simplify the election procedures. Despite several M-voting initiatives reported worldwide; insufficient attention has been devoted to understanding the factors that influence the success or failure of M-voting implementation. It is also important to note that the implementation of M-voting may be very difficult; if the different modalities that aid successful M-voting implementation are not in place. This study seeks to develop a framework that has the potential to enable the successful implementation of M-voting in SA. The proposed framework is an IT artefact that endeavors to improve human experiences for voting. This study followed a Design-Science approach; and it made use of a case study to collect the data via a literature review, observations, questionnaires, focus groups and expert reviews. The study revealed that there is no institutional, legal and regulatory framework for the proliferation of M-voting in SA. Successful M-voting implementation depends on a compendium of factors, which may be unique in the local context where it is implemented. The framework that resulted from the above was assessed for validity and applicability; after which a modified framework was presented. The research concludes with specific implementation guidelines, as well as areas for future research.
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  • Date Issued: 2017

Medication errors in a private hospital closed intensive care unit: a retrospective analysis of process change

  • Authors: Cruickshank, Deborah Claire
  • Date: 2017
  • Subjects: Medication errors
  • Language: English
  • Type: Thesis , Masters , MPharm
  • Identifier: http://hdl.handle.net/10948/15501 , vital:28259
  • Description: Healthcare professionals should be concerned about the safety of the patients in their care and the references to patient safety go back as far as the Hippocratic Oath. Study of literature however shows that medical errors are still of concern and the majority of medical errors are medication errors. The aim of the study was to determine whether process changes introduced reduced both the medication prescribing and medication administration errors in the intensive care unit, thereby contributing to an increase in overall patient safety in the intensive care unit. This study retrospectively analysed the effect of the process changes on medication prescribing and administration errors. The research objectives were to: Identify the number and type of prescribing medication errors prior to the implementation of process changes; Identify the number and type of administration medication errors prior to the implementation of process changes; Identify the process changes implemented; o Determine number and type of prescribing medication errors post the implementation of process changes; Determine number and type of administration medication errors post the implementation of process changes; Assess whether the process changes affected the number and type of prescribing medication errors; and o Assess whether the process changes affected the number and type of administration medication errors. In the Phase One (1 November 2013 to 31 January 2014) 534 patient prescription charts for 172 patients were examined. Medication error rates of 57.6% (n=99) of individual patients reviewed and 18.4% of total patient prescription charts reviewed were found. A total of 69 medication prescribing errors were found in Phase One. This equates to an error percentage of 12.9% per patient chart reviewed and 40.1% per patient reviewed. Thirty medication administration errors were identified in Phase One of the study representing 17.4% of patients reviewed and 5.6% of patient prescription charts reviewed. Medication administration errors included both errors of commission, incorrect doses administered, (n=19) and omission, dose missed, (n=11). Process changes were then introduced and the results of these changes analysed in Phase Two (1 April 2014 to 31 December 2014) show an overall reduction in total medication errors with relation to number of patients reviewed from 57.6% in Phase One to 40.5% in Phase Two. In relation to number of prescription charts reviewed the medication error rate in Phase One was 18.4% and in Phase Two 14.4%. Prescribing errors in relation to number of patients reviewed reduced from 40.1% in Phase One to 26.19% in Phase Two. Overall reductions in percentage of errors were seen in all categories of prescribing errors except duplication of therapy which showed a slight increase. Based on the number of patients reviewed a reduction of prescribing errors was seen in the following categories: transcription errors (13.3% to 7.6%), anticoagulant not prescribed when indicated (3.5% to 2.4%), medication safety (5.2% to 2.9%), dose errors (9.3% to 6.6%) and duration of therapy (6.3% to 3.6%). An increase in the duplication of therapy error rate was seen (2.3% to 3.1%). There was also a reduction in administration errors in relation to number of patients reviewed with a total number of errors of 17.4% in Phase One and 15.8% in Phase Two. The number of prescribing errors per medication chart in Phase Two showed a statistically significant reduction (p=.002). A statistically significant reduction was also seen when the number of errors per patient was reviewed (p=.008). The total number of medication administration errors per medication chart showed a significant reduction (p=.042) as did the number of administration errors per patient (p=.003). When combining the total number of medication errors (both prescriobing and administration) a significant reduction was seen for both the number of charts reviewed (p=.001) and the number of patients reviewed (p=.002). These results indicate that the desired goal of increasing patient safety with regard to medication errors has been achieved but ongoing study is required to ensure the sustainability of the process changes.
  • Full Text:
  • Date Issued: 2017
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