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A strategy for promoting the use of computers across the curriculum at primary school level: a case study

  • Authors: Heukelman, Delene
  • Date: 1994
  • Subjects: Education, Elementary -- Computer programs Computers and children Education, Elementary -- Data processing Computer-assisted instruction
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1774 , http://hdl.handle.net/10962/d1003659
  • Description: A growing number of primary schools are acquiring computers, mainly through parent funding. The study concerns the promotion of computer use across the curriculum in primary schools. Teachers need to be trained in the use of computers as a teaching aid in different subjects. A study comparing two periods of training was undertaken. Two model C primary schools, administered by the Department of Education and Culture, with similar profiles of educational computer use, were selected for the purpose. A training course consisting of five sections, where the use of the word processor, spreadsheet and database, both as personal tools and as teaching aids were introduced, was offered. Care was taken to select topics from current syllabi and to demonstrate how these topics could be presented and enhanced by using the computer. The training was presented at school A over a period of 8 months and at school B over a period of 5 weeks. The supporting material and contents of the course were the same for both groups. A comparison between the effectiveness of the two training regimes was made. The researcher's initial perceptions of the teachers' initial low level of computer literacy were confirmed by a questionnaire, responded to by each participant. It would seem that the shorter raining period was more effective in raising the level of computer literacy and that if the training period was longer, the contact time should be increased to maintain support. Neither training period resulted in a significant increase in computer use, either as a personal tool or as a teaching aid. The failure to do so may be ascribed to a number of influences, one of which is the teaching style of individual teachers. Changing the teaching style of an experienced teacher takes time and more effort than was available for either training period.
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  • Date Issued: 1994

A strategy for promoting computer literacy in staff and students of a teacher training institution : a case study

  • Authors: Keep, Joan Diane
  • Date: 1992
  • Subjects: Computer literacy Computer-assisted instruction Teachers -- Training of -- Data processing
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1773 , http://hdl.handle.net/10962/d1003658
  • Description: A case study carried out at Edgewood College of Education (Natal) attempted to demonstrate how in-house training could provide staff with the necessary computer literacy skills to integrate computer technology into lecturing and teaching programmes. The duration of the project was six months and during this time a group of thirty academic staff members were exposed to computer technology via practical experience, lectures and demonstrations. The results gleaned from the project show that most of the staff involved in the project developed sufficient computer skills to be of benefit in their professional and personal tasks. In addition the recognition of the value of word processing and desk top publishing led to the staff encouraging students to use these software packages in the preparation of coursework. Consequently the use of the computer resources increased noticeably in the six month period. One of the goals of the study was to show how staff, once computer literate, would make use of generic software to integrate computer technology into their lecturing programmes. This did not happen and the reasons for this failure are discussed.
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  • Date Issued: 1992

A strange counterpoint : classical music performance and identities in Grahamstown, South Africa

  • Authors: Marais, Terence Wilmot Eugene
  • Date: 2011
  • Subjects: Music -- Western influences Music -- Performance -- Psychological aspects Music appreciation -- South Africa -- Grahamstown Music -- South Africa -- Grahamstown
  • Language: English
  • Type: Thesis , Masters , MMus
  • Identifier: vital:2677 , http://hdl.handle.net/10962/d1007491
  • Description: This study investigates the perceptions of South African practitioners of Western European Art Music (WEAM), specifically as they relate to the value of WEAM in contemporary South African society. In exploring some of the connections between musical identity and national identity, it sets out to discover what value WEAM holds for a certain group of student pianists. Qualitative empirical data was collected in the form of in-depth, semi-structured interviews and questionnaire responses, and the findings point to numerous, nuanced expressions of self and varied intersections of the nation with musical identity in the life of the individual. Further, WEAM appears to represent a crucial point of identification for these individuals, in each case generating positive affirmations of the self.
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  • Date Issued: 2011

A step forward in defining Hsp90s as potential drug targets for human parasitic diseases

  • Authors: Faya, Ngonidzashe
  • Date: 2014
  • Subjects: Heat shock proteins -- Research , Malaria -- Chemotherapy -- Research , Antimalarials -- Development -- Research , Parasitic diseases -- Research , Plasmodium
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4110 , http://hdl.handle.net/10962/d1012993
  • Description: Parasitic diseases remain a health burden affecting more than 500 million people worldwide with malaria having the highest mortality rate. The parasites can be transferred to the human bodies either through the mouth by ingestion of contaminated food and water or through the skin by bug bites or direct contact to environments harbouring them. Epidemiological control seems to be impossible since there is failure to control the insect vectors as well as practice of hygiene. Therefore, this has led to the development of a number of vaccines, chemotherapy and disease control programs. However, parasites have increasingly developed resistance to traditionally used anti-parasitic drugs and due to that fact there is need for alternative medication for parasitic diseases. Heat shock protein 90 (Hsp90) facilitates the folding of proteins in all living cells and their role is more important to parasites because of their environmental changes, from vector to host. Hsp90s play a major role; therefore this justifies the need for a deeper analysis of the parasitic Hsp90s. Recent studies have revealed that, the Plasmodium sp. Hsp90 has an extended linker region which increases the protein’s affinity for ATP and its inhibitors. Therefore we hypothesize that there are also significant features in other parasitic Hsp90s which would lead to Hsp90 being defined as potential drug targets. In the present study an attempt was made to gain more insight into the differences in primary structure of human and parasitic Hsp90s. The sequences were retrieved from the NCBI database and analysis was done in three groups basing on the localization of the Hsp90. The physicochemical properties were calculated and in every group, the protozoan Hsp90s showed significant differences when compared to the human orthologs. Multiple sequence alignments (MSA) showed that endoplasmic reticulum Hsp90s have an extended region in the middle domain indicating their ability to bind to a unique subset of client proteins. Sequence identities between the human and parasites showed that the protozoan Hsp90s are less related to the human Hsp90s as compared to the other parasites. Likewise, motif analysis showed the trypanosomatids and apicomplexan groups have their own unique set of motifs and they were grouped together in the phylogenetic analysis. Phylogenetic analysis also showed that, the protozoan Hsp90s forms their own clades in each group while the helminths did not form in endoplasmic reticulum group. In this study, we concluded that, Hsp90 can be a potential drug target for the protozoan species and more specifically those from the apicomplexan and trypanosomatids groups.
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  • Date Issued: 2014

A statistical study of travelling ionospheric disturbances over the African-European and American sectors

  • Authors: Thaganyana, Golekamang Piet
  • Date: 2023-03-31
  • Subjects: Uncatalogued
  • Language: English
  • Type: Academic theses , Doctoral theses , text
  • Identifier: http://hdl.handle.net/10962/422541 , vital:71956 , DOI 10.21504/10962/422543
  • Description: This research presents a long-term statistical study of travelling ionospheric disturbances (TIDs) of low- and high-latitude origin over the American and African-European sectors between 2010 and 2018. The TIDs of low latitude origin (hereafter known as poleward TIDs) were studied in both quiet and disturbed conditions, whereas the equatorward TIDs were only studied during quiet conditions. The Kp > 4 and Dst_ -50 nT was used as a criterion for geomagnetic disturbed conditions, while the four geomagnetically quiet days were selected each month based on Kp < 3. Observations of TIDs are made using Global Navigational Satellite Systems (GNSS) total electron content derived data. During quiet conditions, seven and two transhemispheric TIDs were identified over the African-European and American sectors, respectively. The observed TIDs originated from the wintertime hemisphere and propagated into the summertime hemisphere. The horizontal velocity, periods, and horizontal wavelengths of TIDs are in range of cH = 120-274 m/s, 48-80 min and _H = 379-1104 km, respectively. These quiet-time equatorward TIDs have been associated with tertiary gravity waves (GWs) from the dissipation of secondary GWs which are in turn generated from the dissipation of mountain waves (MWs) as a result of excited orographic forcing. The poleward TIDs during geomagnetically quiet conditions over the African and American sectors occur mainly during local daytime. Poleward TIDs were observed mostly in the African-European sector than the American sector. Their horizontal propagation velocities and periods range between 129-280 m/s and 39-70 min over African-European and American sectors. Although the mechanisms responsible for launching quiet-time poleward TIDs have not been established in this study, lower atmospheric processes such as convection systems, sudden stratospheric warming and cold weather fronts may have a role in their generation. During geomagnetic storms in the African sector, almost all poleward TIDs (with the exception of two cases) during the main phase were large-scale with horizontal velocities and periods ranging from 250-503 m/s and 30 min to 2 hours. During recovery phase, poleward TIDs fall under the category of medium scale. In the American sector, the majority of poleward TIDs occurred during the storm's main phase, as opposed to the African-European sector, which experienced a significant number of poleward TIDs during the recovery phase. The periods and horizontal velocities of TIDs range from 45 min-1.5 h and 180-296 m/s during main phase. During the recovery phase, the horizontal velocity and period range from 177-271 m/s and 40-1.5 h, respectively. Overall, it has been shown that statistically, changes in equatorial electrodynamics related to enhanced eastward electric _eld and hence increased equatorial electrojet (vertical E_B drift) correlates highly with the reported poleward TIDs. , Thesis (PhD) -- Faculty of Science, Physics and Electronics, 2023
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  • Date Issued: 2023-03-31

A statistical study of the errors involved in the sampling and chemical analysis of soils and plants, with particular reference to citrus and pineapples

  • Authors: Steyn, Willem Johannes Abraham
  • Date: 1958
  • Subjects: Soil chemistry , Plants -- Analysis , Soils -- Analysis
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:4506 , http://hdl.handle.net/10962/d1013291
  • Description: 1. Accurate and reproducible methods for the determination of N and acid- extractable P in soils are described. The variations in N, P, and K found by intensive sampling of three different soil types are presented. 3. Suggestions for the adequate sampling of soils for various purposes arc given. 4. A study is presented of the preparative stages in leaf analysis (washing, drying, grinding and storage) as applied to citrus and pineapple leaf material. Likely errors are pointed out and procedures whereby these may be minimised are described. 5. A reliable wet-ashing procedure for obtaining leaf solutions is described. 6. Accurate and reproducible methods for the determination of total N, P,. K, Ca, Mg, Na, Fe, Mn, Zn and Cu in citrus and pineapple leaves are presented. 7. It is shown that diurnal variations in nutrient concentrations occur in citrus and pineapple leaves. 8. The variations in N, P, K, Ca, Mg, Na, Fe, Mn, Zn and Cu, occurring from tree to tree in 3 different Navel orange blocks are presented. It is shown that if all these elements are to be represented . to within 10% of the mean values on a 19 : 1 probability level, all the trees in the blocks would have to be sampled. Reasonable sampling procedures for various purposes are suggested. 9. The variations in N, P, K, Ca, Mg, Fe, Mn, Zn and Cu, occurring in 3 different Cayenne pineapple plantations are presented and described. Suitable sampling procedures are suggested.
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  • Date Issued: 1958

A standardised protocol for roadkill detection and the determinants of roadkill in the greater Mapungubwe Transfrontier Conservation Area, Limpopo Province, South Africa

  • Authors: Collinson, Wendy Jane
  • Date: 2013
  • Subjects: Roadkill -- South Africa -- Mapungubwe Site , Traffic safety and wildlife -- South Africa -- Mapungubwe Site
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5606 , http://hdl.handle.net/10962/d1002056 , Roadkill -- South Africa -- Mapungubwe Site , Traffic safety and wildlife -- South Africa -- Mapungubwe Site
  • Description: Despite evidence suggesting that road traffic is a major threat to biodiversity loss, very little is known about its actual impact on wildlife populations in South Africa. Globally, road density and traffic volumes are increasing, and although huge budgets are devoted to the construction and upgrading of roads, there is little or no allocation to mitigation measures for protecting fauna in most countries, particularly Africa. Further, no global standardised protocol exists for the rapid assessment of roadkill or the most economical and efficient approach for assessing roadkill rates. Using vehicle field trials, the reliability of detecting artificially deployed roadkill was assessed. Roadkill detection rates decreased significantly at speeds >50 km/h and were also significantly influenced by light conditions (i.e. detection success was greater when the sun was high) and the position of the roadkill on the road (i.e. smaller roadkill on verges were often missed). These results suggest that roadkill sampling was most effective between 1.5 hours after dawn and 1.5 hours before dusk and that driving at slower speeds (<50 km.h⁻ₑ) was required to detect roadkill. This protocol was implemented across three ecological seasons on a 100 km paved road and a 20 km unpaved road in the Greater Mapungubwe Transfrontier Conservation Area, Limpopo Province, South Africa. Driven daily over a 120-day period (three periods consisting each of 40 days), a total of 1,027 roadkill were recorded. These comprised 162 species from all terrestrial vertebrate groups with birds being the most commonly encountered roadkill (50% of all incidents). The high numbers of vertebrates identified as roadkill suggests that road traffic could have potentially unsustainable impacts on wildlife populations and hence the biodiversity of the area. Seventeen variables were identified as possible determinants of roadkill occurrence with season, rainfall, minimum and maximum temperature, habitat type, grass height, grass density, fence type and vehicle type significantly influencing roadkill numbers. Significantly more roadkill were detected on the paved road (9.91/100km) than on the unpaved road (1.8/100km) probably because of greater traffic volumes and the increased speed that vehicles travelled on the paved road. Warmer temperatures and increased rainfall in the preceding 24 hours also increased road mortality numbers as animals tended to become more active during these times. Interestingly, more roadkill was detected in open roadside habitats compared to dense roadside habitats on both the paved and unpaved roads and when grass on the roadside verge was of intermediate height. Open habitat possibly may provide a natural corridor for wildlife which ultimately end up on the road. Roadkill numbers increased when certain other physical barriers, such as cattle fences, were present, probably because these barriers were more penetrable than electric fencing. A series of mitigation measures are proposed to reduce the impacts of roads on wildlife in South Africa. These mitigation measures highlight the need to address the balance between the development of a country’s transport infrastructure and the conservation of its fauna. It is important that research on the impacts of roads becomes standardised to enable robust statistical comparisons which will provide a greater understanding of the potential threats to vertebrate biodiversity
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  • Date Issued: 2013

A standardisation of Professor Spearman’s “A measure of 'intelligence' for use in schools” and a discussion of the methods of factorial analysis as applied to the study of ability

  • Authors: Butler, J E
  • Date: 1949
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:20970 , http://hdl.handle.net/10962/5740
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  • Date Issued: 1949

A stable isotope approach to trophic ecology resolving food webs in intertidal ecosystems

  • Authors: Hill, Jaclyn Marie
  • Date: 2008
  • Subjects: Stable isotopes Food chains (Ecology) Stable isotopes in ecological research Intertidal ecology Mussels -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5771 , http://hdl.handle.net/10962/d1005459
  • Description: There are broad differences in regional oceanography and primary production around the South African coast, which we might expect to give rise to major differences in trophic pathways. δ⁻¹³C and δ⁻¹⁵N isotopic ratios of suspended particulate matter (SPM), mussels, various intertidal consumers and common macroalgae along the South African coastline were explored using stable isotope analysis to investigate biogeographic and temporal variability of isotopic signatures of marine intertidal consumers and their food sources around the coast of South Africa, with a focus on evaluating the dependence of intertidal mussels on phytoplankton and macroalgal-derived organic carbon. Isotopic equilibration rates of four mussel tissues were determined through laboratory feeding experiments, which established that adductor tissue had the slowest isotopic turnover rate, and was subsequently used as an indication of overall mussel diet. Biogeographic, temporal and nearshore/offshore trends of isotopic ratios of SPM were investigated along 10km transects perpendicular to the coast and SPM exhibited overall trends of carbon depletion when moving from west to east along the coastline and from nearshore to offshore water, in both cases suggesting a shift from macrophyte detritus to a phytoplankton signature. δ⁻¹³C signatures of SPM also revealed temporal and biogeographic variation that had strong ties to local oceanography, being closely correlated to regional hydrographic features and tidal influences. Mixing models indicated filter feeders demonstrated over 50% dependence on nearshore SPM for organic carbon and it was possible to categorize them into geographic groups based on their carbon and nitrogen signatures, suggesting biogeographic shifts in resources. Biogeographic shifts in diet were also seen in some grazers. Difficulties in relating macroalgae to mussel diet led to investigations into the isotopic changes associated with macroalgal decomposition. Variation in photosynthetic fractionation, leaching and microbial mineralization are believed to have resulted from species-specific patterns of degradation. Although the strong links between carbon signatures and local oceanography indicate that stable isotope analysis is a powerful tool for the study of water mixing and coastal hydrography in relation to food-web analyses, substantial variation in fractionation of primary consumers, along with different periods of time integration between consumers and their food sources must be considered in future studies, to resolve trophic links in marine food webs successfully.
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  • Date Issued: 2008

A spectroscopic study of the electronic effects on copper (II) and copper (I) complexes of ligands derived from various substituted benzyaldehyde- and cinnamaldehyde- based schiff bases

  • Authors: Magwa, Nomampondo Penelope
  • Date: 2010 , 2010-03-19
  • Subjects: Copper -- Analysis , Schiff bases , Organometallic compounds
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4407 , http://hdl.handle.net/10962/d1006712 , Copper -- Analysis , Schiff bases , Organometallic compounds
  • Description: Several Schiff base ligands, N, N‟-(aryl)benzyaldiimine ligands (R-BEN); N, N‟-(aryl)benzyaldiamine dihydrochloride ligands (R-BENH•2HCl); N, N‟-(aryl)benzyaldiamine ligands (R-BENH); N, N‟-bis(cinnamaldiimine) ligands (R-CA2EN) were synthesized for the investigation of the electronic effect of the substituents at para-position of the Schiff base ligands and their copper complexes. The synthesis of Schiff bases was carried out by reacting a series of para-substituted benzyaldehyde, and para-substituted cinnamaldehyde with ethylenediamine. The imine group of Schiff bases, N, N‟-(aryl)benzyaldiimine ligands and N, N‟-bis(cinnamaldiimine)ligands were reduced to corresponding amines with sodium borohydride in methanol These ligands, N, N‟-(aryl)benzyaldiamine ligands (H-BENH), N, N‟-bis(cinnamaldiimine)ligands (CA2EN) were reacted with copper(II) dihalide and copper(I) monohalide ions respectively to form complexes. The ligands and their complexes were analysed using elemental analyses, FT-IR spectroscopy (mid-IR), UV/vis in aprotic and protic solvents,while mass spectrometry, 1H-NMR and 13C-NMR were used to further analyse the ligands. By using substituent parameters, both the single and dual substituent parameters with the spectroscopic data obtained from the spectroscopic techiques mentioned above, it was hoped to monitor and determine whether the electronic effects (resonance or inductive effcets) was predominantly within the Schiff base ligands and copper complexes. The NMR studies with dual substituent parameters suggest that the effects of the substituents are transimitted through the ligands, via resonance effects and that the phenyl group is nonplanar with the azomethine in N, N‟-(aryl)benzyaldiimine ligands. The presence of an extra double bond in Schiff base {(N, N‟-bis(cinnamaldiimine) ligand)} altered the electron density. The UV/vis studies showed that the symmetry of the N, N‟-bis(4-R-benzyl)-1, 2-diaminoethanedihalidecopper(II) complexes were predominantly tetrahedral for both chloro and bromo complexes. The correlation studies from mid-infrared were beneficial in monitoring the effect experienced by N, N‟-(aryl)benzaldiimine ligands, the studies suggest that the inductive effect is more pronounced at the C=N.
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  • Date Issued: 2010

A spatio-temporal, landscape perspective on acacia dealbata invasions and broader land-use and cover changes in the Northern Eastern Cape, South Africa

  • Authors: Gouws, Aidan John
  • Date: 2018
  • Subjects: Acacia -- South Africa -- Eastern Cape , Biological invasions -- South Africa -- Eastern Cape , Plant invasions -- South Africa -- Eastern Cape , Acacia -- Biological control -- South Africa -- Eastern Cape , Eastern Cape (South Africa) -- Rural conditions
  • Language: English
  • Type: text , Thesis , Masters , MSc
  • Identifier: http://hdl.handle.net/10962/62373 , vital:28161
  • Description: Biological invasions are a wicked, social-ecological problem, interacting with numerous components within and across a range of spatio-temporal scales, with the potential to disturb broader socio-economic and ecological systems. Acacia dealbata is an invasive shrub in South Africa, widely naturalised across the grassland biome. Although the deployment of a biocontrol agent on A. dealbata is apparently justified considering its highly invasive and ecologically destructive nature, it should proceed with caution due to the integration of the species into the livelihoods of rural communities. This study sought to understand the nature and extent of the A. dealbata invasion in the northern Eastern Cape. Research was conducted in nine villages in rural Matatiele, Mount Fletcher and Maclear, selected for the pervasiveness of A. dealbata around these villages. A time-series of aerial photographs were systematically classified according to designated A. dealbata and land-use/land cover (LULC) categories in ArcGIS to track changes in the extent and rate of spread of A. dealbata, while standard vegetation surveying techniques were used to determine the current abundance and productivity of A. dealbata in selected areas. A high degree of spatial variability characterised the extent, density and biomass of A. dealbata, as well as the annual rate of spread and biomass production. The growth, productivity and spread of A. dealbata were significantly positive, and relatively few biophysical conditions correlated with the invasion. This was indicative of the broad range of invaded and potentially invasible habitats, suggesting that the extent and abundance of A. dealbata will likely continue to increase, barring deliberate intervention. Broader changes in LULC were also apparent, multidirectional and spatio- temporally variable. Despite a net increase in A. dealbata, the invasion was found to be highly dynamic, with various LULC transitioning to A. dealbata, but in turn A. dealbata transitioning to other LULC. Indeed, biological invasions are dynamic, context-specific phenomena, shaped by the heterogeneity of landscapes. Management interventions to limit or control A. dealbata should therefore consider the spatio-temporal dynamics of invaded landscapes, as well as the local-scale abundance, productivity and biophysical conditions of the area, while taking into consideration the livelihood requirements of the local communities.
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  • Date Issued: 2018

A spatial and temporal analysis of the changes in alien macrophyte communities and a baseline assessment of the macroinvertebrates associated with Eurasian watermilfoil, Myriophyllum spicatum L. (Haloragaceae) in the Vaal River

  • Authors: Fordham, Colin Justin
  • Date: 2012
  • Subjects: Water hyacinth -- Control -- South Africa , Aquatic weeds -- Control -- South Africa , Eurasian watermilfoil -- South Africa , Water quality management -- South Africa , Freshwater invertebrates -- Ecology -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5767 , http://hdl.handle.net/10962/d1005455 , Water hyacinth -- Control -- South Africa , Aquatic weeds -- Control -- South Africa , Eurasian watermilfoil -- South Africa , Water quality management -- South Africa , Freshwater invertebrates -- Ecology -- South Africa
  • Description: The majority of South Africa’s fresh water (lotic and lentic), is eutrophic and this has resulted in water hyacinth, Eichhornia crassipes (C.Mart.) Solms. (Pontederiaceae) becoming South Africa’s most damaging aquatic macrophyte. Recently however, concerns have also been voiced over the presence of highly invasive submerged macrophyte species, such as Eurasian water-milfoil, Myriophyllum spicatum L. (Haloragaceae) in the Vaal River. Interaction studies between floating and submerged macrophytes have shown that floating macrophyte dominance restricts light penetration into the water column shading out submerged macrophytes while submerged macrophyte dominance reduces nutrient availability in the water column limiting floating macrophyte growth. This cycle ensures that these species cannot coexist in the same habitat for extended periods of time. The aims of this thesis were to: 1. Investigate changes in the historical and current macrophyte dominance in the Vaal River 2. Determine whether these changes could be attributed to stochastic events, such as floods and herbicide control measures. 3. The physio-chemical conditions of the water column, and whether pressure from herbivory by macroinvertebrates had possibly influenced Eurasian water-milfoil’s ability to dominate. Spatial and temporal analysis of satellite imagery revealed that water hyacinth and submerged macrophyte species dominated different regions of the study area over different periods of time from 2006 to 2010. This was significantly correlated with nitrate concentrations of the water column. One of the lower Vaal River Water Management Areas (WMA) had changed from a water hyacinth dominated state in 2006 to an alternative submerged macrophyte dominated stable state in 2008. It was concluded that this change could be attributed to: a stochastic flooding event in 2006; perturbation from integrated control measures implemented against water hyacinth; and low nitrate concentrations of the WMA. The lack of any substantial macroinvertebrate herbivory pressure or control measures implemented against Eurasian water-milfoil, compared to similar surveys conducted in the U.S.A. and its native range in Eurasia was shown to contribute to its dominance. Future successful integrated control programmes, including biological control against Eurasian water-milfoil, could provide the perturbation required to restore the ecosystem. However, without the reduction in nitrate concentration levels, water hyacinth will remain the dominant stable state of the rest of the Vaal River.
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  • Date Issued: 2012

A South African perspective on the tax implications of virtual asset accumulation and transactions stemming from persistent virtual worlds

  • Authors: Haupt, Alexander
  • Date: 2012
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:884 , http://hdl.handle.net/10962/d1001638
  • Description: Massively multiplayer online role-playing games are growing in popularity with millions of people participating in these persistent online environments on a daily basis. Accompanying the ever-increasing subscription numbers is an increase in real money trade transactions stemming from these game worlds. The research question to be addressed in this thesis is whether transactions stemming from virtual worlds have real-world taxation consequences. The goal of this research is to determine the taxability of virtual assets obtained in structured as well as unstructured virtual environments and to attempt to establish the differences between capital and revenue receipts in these virtual realms, taking into account the nature of a receipt. The general deduction formula is applied to establish the deductibility of expenditure incurred whilst participating in these virtual environments. Sundry matters such as Value-Added Tax, donations tax, the withholding tax on gambling gains and tax avoidance will also be addressed. The methodology adopted for the research could best be described as interpretative, aimed at analysing and interpreting the relationship between real world taxes and persistent virtual worlds and the transactions that stem from participation therein. The research is based purely on documentary evidence. After applying relevant tax legislation to virtual economies it became evident that merely because virtual assets only exist in virtual reality does not necessarily preclude them real world tax consequences. It was concluded, however, that it is not practical for the South African Revenue Service to monitor all virtual world transactions or for participant taxpayers to calculate the real world value of each and every asset acquired in-world. As a result, it was concluded that real world tax consequences should only be applied in situations where participants actually convert their virtual assets into real world currency.
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  • Date Issued: 2012

A sociological understanding of urban governance and social accountability: the case of Bulawayo, Zimbabwe

  • Authors: Sivalo, Delta Mbonisi
  • Date: 2019
  • Subjects: Zimbabwe -- Politics and government -- 1980- , Municipal government -- Zimbabwe -- Harare , Municipal government -- Sociological aspects-- Zimbabwe -- Harare , Municipal government -- Citizen participation -- Zimbabwe -- Harare
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/71515 , vital:29860
  • Description: This thesis seeks to understand the ways in which urban governance and urban-based civic participation interact with each other in contemporary Zimbabwe, with a particular focus on the factors influencing and shaping social accountability and effective citizen involvement in urban governance processes. This main objective is pursued with specific reference to Bulawayo, which is one of two metropolitan centres in Zimbabwe. The focus is specifically on questions around social accountability, citizen participation and centralised urban governance. In this regard, it is important to recognise that social accountability and urban governance need to be understood in the context of their inherent relationship and how these both shape and determine each other. In this respect, there is need to probe the foundations that shape the lived experiences of communities, through social accountability and urban governance, and how these pattern development and social change. Zimbabwe for over a decade now has gone through a series of economic and political crises which have impacted detrimentally on urban governance. With the economy in free-fall, local authorities have had to pursue a range of strategies to sustain themselves. These socio-economic conditions have forced a change in relations between the state, cities and citizens. Many studies have examined this regarding the politics of contestation between the ruling party (ZANU-PF), the state, and the main opposition party (MDC) in urban governance in Zimbabwe. However, this study zeros in on social accountability and how it is shaped by the prevailing socio-economic and political environment in Zimbabwe. At the same time, the lived experiences of communities vary and this variance influences and affects social accountability interventions and outcomes in cities like Bulawayo. Importantly, the thesis offers a longitudinal study which can map the contextual factors affecting and influencing social accountability in Bulawayo over time. Though recognising the debilitating effects of centralised urban governance on social accountability, the thesis also raises questions about the shifting, and often tenuous, relationship between the city and the central state, on one hand, and the city and its citizens on the other. In doing so, it considers the role of citizens, institutions and actors in responding to the impacts of urban governance and social accountability. In pursuing this thesis, a range of mainly qualitative research methods were used, including key informant interviews, focus group discussions, observation and use of documents. In the end, the thesis offers a nuanced analysis of the everyday complexities and challenges for social accountability in urban Bulawayo, Zimbabwe and thereby contributes to theorising social accountability and urban governance in Africa more broadly.
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  • Date Issued: 2019

A sociological understanding of contemporary child marriage in Mabvuku, Harare, Zimbabwe

  • Authors: Madzivire, Shamso Christine
  • Date: 2020
  • Subjects: Child marriage -- Zimbabwe -- Mabvuku , Child marriage -- Zimbabwe -- Case studies , Shona (African people) -- Social life and customs , Marriage customs and rites -- Zimbabwe , Shona (African people) -- Marriage customs and rites , Marriage -- Zimbabwe
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/142566 , vital:38091
  • Description: Child marriage is a phenomenon that has been increasingly recognised as a global problem since the late nineteenth century. Since then, scholars across many disciplines along with various agencies such as government bodies and non-governmental organisations have tirelessly engaged in research exploring the causes and consequences of this practice and in developing prevention and mitigation strategies. These research efforts have been concentrated in some parts of the world and not others, with the findings in many cases being generalised problematically across different geographical areas. This thesis stands as a response to the dearth of academic research on child marriage in present-day Zimbabwe and simultaneously highlights the significance of studying the specificities of child marriage under particular historical and spatial conditions. The main objective of this thesis is to explore and understand child marriage as a part of modernday marriage practices in Zimbabwe, through a case study of child marriage in Mabvuku in Harare. In addressing this objective, it is hoped that new ways of thinking around this phenomenon will become evident. In addressing this main objective, the thesis considers the experiences of child brides, the drivers and consequences of child and post-child marriage experiences. It does this seeking to understand child marriage with reference to the types of marital unions which exist amongst Shona people in pre-colonial times and in post-colonial Zimbabwe. The thesis adopts a qualitative research methodology which involved in-depth semistructured interviews with 25 women in Mabvuku who were married before the age of 18, along with focus group discussions with community workers and interviews with pertinent government and non-government representatives. Due to certain challenges with current theorising about child marriage, there is an attempt to build theory by drawing upon in particular the Zimbabwean notion and practice of hunhu. A key conclusion is that child marriage in present-day Zimbabwe is in part a result of family transitions which arose during the time of colonialism and continue to this day.
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  • Date Issued: 2020

A sociological study to explore the knowledge of Pre-Exposure Prophylaxis at Rhodes University

A sociological study of menstrual hygiene management in schools in the Makana District, Eastern Cape, South Africa

  • Authors: Bloem, Sharon Gretchen
  • Date: 2021-10-29
  • Subjects: Schoolgirls Health and hygiene South Africa Makhanda , Menstruation Social aspects South Africa Makhanda , Health behavior in adolescence South Africa Makhanda , Teenage girls Health and hygiene South Africa Makhanda , Teenage girls Physiology South Africa Makhanda , Life skills South Africa Makhanda
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10962/189974 , vital:44952
  • Description: Appropriate menstrual hygiene management is affected by taboos and secrecy surrounding menstruation. Inadequate information and knowledge about menstruation and lack of resources for managing menstruation hygienically have impacted adolescent girls on a psychosocial and physical level. Consequently, the dignity of schoolgirls during the onset of menstruation through puberty and adolescent phases is jeopardised. It is therefore imperative to understand the normal physiological changes that school-going children from Grades 6 to 12 undergo and acknowledge how these changes affect their education within the school environment. In the Makana district, Eastern Cape, South Africa, the topic of menstrual hygiene management is under-researched at schools and, therefore, this research explores school educators’ perceptions of menstrual hygiene management at primary, secondary and private schools in this area. Schools have a responsibility to create a safe environment for learners’ education, which includes the topic of menstruation without discriminating against or labelling menstruating girls. This research found that the topic of menstruation is only discussed in Life Science and Life Orientation subjects and only covers the physiological changes of the body. These subjects, however, exclude the topic of menstrual hygiene management. This study found that several schools in the Makana district are not adequately equipped to provide for the needs of menstruating girls and therefore educators need to be prepared to deal with menstruation in the school context. The educators are also required to go for regular training or workshops to equip them to manage menstruation in a school environment. The infrastructure of a school includes water and sanitation which are components of menstrual hygiene management. The infrastructure at the participating public schools was inadequate and therefore impacted on the menstrual hygiene management for the girls. The unavailability of water, the non-existence of a sick room and lack of a waste disposal system at some public schools presented further challenges for menstrual hygiene management. A qualitative research method was applied in this study and a symbolic interactionism approach was used. , Thesis (MA) -- Faculty of Humanities, Sociology, 2021
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  • Date Issued: 2021-10-29

A sociological exploration of whether culture inhibits comprehensive sexual education in schools: the case of urban schools in Mpika district of Zambia

  • Authors: Nyoni, Kaliza
  • Date: 2022-10-14
  • Subjects: Sex instruction Zambia , Sex instruction Social aspects Zambia , Culture , High school students Attitudes , Sex educators Attitudes , Influence (Psychology) , Language and culture Zambia
  • Language: English
  • Type: Academic theses , Master's theses , text
  • Identifier: http://hdl.handle.net/10962/406796 , vital:70308
  • Description: This study investigated the impact and influence of culture in the provisioning of comprehensive sexuality education , the case of urban schools of Mpika district of Zambia. The specific objectives were to investigate the frameworks that inform the teaching of CSE in schools, explore ways in which influence of culture on the framework affects the leaners participation in learning CSE, explore the influence of cultural norms, metaphors, and values on that framework, explore whether cultural norms have an impact and influence on teachers and explore whether there is a discrepancy between cultural values and CSE. The methodology which was used in carrying out the research was descriptive research design and purposive sampling was used in which a sample of 21 respondents who are leaners were picked and 5 teachers who teach CSE were chosen. The interview schedule was used to collect data from the sample which was drawn. The data gathered was analysed using concepts and themes as well as observer impression. The findings of this research are that there is a framework that informs the teaching of CSE in schools whose aim is to curb school drop outs by reducing teen pregnancies and high infection rates of STIs and HIV/AIDS. The framework seeks to empower knowledge on the adolescents in relation to gender norms, rights in relationships and sexuality. The major findings of the research are that culture has an influence on the teachers and leaners. Of particular discovery is the use of symbols through charts which display human private parts. This is construed by the teachers and learners to be against their cultural beliefs. Furthermore, language that this subject uses is culturally seen to be too strong and vulgar , to both teachers and leaners. This study found out that open discussion in class of the topic on sexuality does not sit well with the leaners as it is against their cultural orientation. The research also found out that there are lessons in CSE that are beneficial to the learners such as , how to prevent contracting of STIs and HIV/AIDS and prevention of unwanted pregnancies. , Thesis (MA) -- Faculty of Humanities, Sociology, 2022
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  • Date Issued: 2022-10-14

A sociological analysis of the sex education of young adult white womxn and their understandings and practices of ‘Safe Sex’

  • Authors: Guerra, Cassandra Gadelha
  • Date: 2020
  • Subjects: Sex instruction , Sex instruction for girls , Women, White -- Psychology , Women, White -- Sexual behavior
  • Language: English
  • Type: text , Thesis , Masters , MSocSci
  • Identifier: http://hdl.handle.net/10962/147267 , vital:38610
  • Description: This research sets out to examine the experiences and perspectives of young adult white womxn regarding their respective sex education. This is in terms of how sex education may shape and influence sexual practices. The relevance of exploring the sex education of this group is to gain an understanding of how constructions of sex education may facilitate the negotiation of sexual practices, particularly as these practices relate to the negotiation of ‘safe sex’. This involves an exploration of definitions of ‘safe sex’ as well as an examination of the various sources of sex education. This research argues that sex education has been socially constructed within a ‘heterosexual matrix’ where both gender identities and sexuality are constructed in heterosexual terms in accordance with compulsory heterosexuality. Furthermore, that sex education as well as understandings and practices of ‘safe sex’ intersect with other social categories such as race, gender and sexuality. Much of the sex-related research conducted in South Africa focuses on people of colour, as a result very little is known about the sexual behaviours and practices of the white demographic. This research accounts for the absence of analysis of sexual practices and behaviour among white people by examining the sex education and sexual practices of young adult white womxn between the ages of 19 and 24. The research observed key sources of sex education which included parents, schools, religious institutions and the internet. Findings indicate that the sex education of participants reflected ideals of heteronormativity and misogyny which were found to directly influence their understandings and practices of both sex and ‘safe sex’. Furthermore, that the sex education participants received has ultimately failed to promote ‘safe’ sexual practices.
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  • Date Issued: 2020

A sociological analysis of the Rhodes University Students and staff members’ perceptions on the use of traditional medicine and biomedicine

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