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Teachers’ views on grade 7 reading comprehension skills amongst English first additional language learners: a case study

  • Authors: Ruiters, Benedictor
  • Date: 2019
  • Subjects: Reading comprehension English language -- Study and teaching -- Foreign speakers
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: http://hdl.handle.net/10353/16307 , vital:40707
  • Description: The purpose of this study was to investigate the views of Teachers about reading comprehension skills in grade 7 English Additional Language classrooms in Buffalo City Metropolitan, Eastern Cape. Objectives are to instil the love for reading and enabling learners to successfully learn to read and attain their full potential. The researcher was interested in exploring broader trends in reading comprehension skills, with the intention of contributing possible strategies to address the literacy level in English First Additional Language. The study was framed as qualitative in inquiry; a face-to-face semi-structured interview was used to collect data. The participants comprised of 24 learners and 4 educators. The theoretical framework utilised was Lev Vygotsky’s (1979) constructivist theory to analyse data using a qualitative analysis approach. Different tools to verify data, which comprised of semi- structured interview of open-ended questions and document analysis to obtain data from English First Additional Language teachers in four primary schools in the Buffalo City Metropolitan District, were used. Findings indicate English First Additional Language learners are not proficient in the language of teaching and learning because in other public schools mother tongue is additive language, while in other schools it does not exist. The recommendation was that the Department of education needs to introduce a reading module for English First Additional teachers who need training in this area of learning. Another recommendation highlighted by teachers is the revisiting of child development theories that will help teachers have a better understanding about the learners and which strategies to utilise during reading.
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  • Date Issued: 2019

The design of a building linking central and the Baakens river mouth

  • Authors: De Klerk, Paul
  • Date: 2019
  • Subjects: Architecture -- South Africa -- Port Elizabeth -- 21st century , Urban renewal -- South Africa -- Port Elizabeth , Architecture -- South Africa -- Port Elizabeth
  • Language: English
  • Type: Thesis , Masters , MArch
  • Identifier: http://hdl.handle.net/10948/43138 , vital:36746
  • Description: This treatsie focuses around the reationship of the Baakens Valley and the historical core and their respective declined states that has been affected through shifts in urban development and urban sprawl. Urban centres are moving away from the core decentralizing activity affecting the central areas allowing people-orientated environments to decline as an outcome of urbanism. Settlement expansion was forced along the coast due to topography Decentralised city growth with urban sprawl far from the historical core. New centres developed within residential realms detracted from people returning to the historical core Increased major arterial routes diminished density through vehicular orientated living spaces vs the density of the historical core orientated to the pedestian and mixed use activity City centre deteriorated due to Urban expansion and activity centres leaving the CBD resulting in a dilapidated city core.
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  • Date Issued: 2019

Critical assessment of the human resource capacity needs of senior management at Thaba Chweu Municipality in Mpumalanga Province, South Africa

  • Authors: Dube, Boy David
  • Date: 2018
  • Subjects: Municipal government Rural poor Senior leadership teams
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10353/12172 , vital:39193
  • Description: The terrain of local government is not only very complex, dynamic, and challenging, but also very unique. The quality of human resources is vital in a public institution, particularly in institutions that are meant to service communities by providing sustainable basic services. Amongst the concerns raised at a municipal level are the lack of professionalism and the required competency and capacity amongst the workforce that must perform the actual duties of servicing the local communities. This study was aimed at identifying and analysing human resource development and human resource management policies, strategies and needs in line with the current circumstances and conditions at a particular municipality. A series of challenges (that a number of community members, newspaper articles, community leaders and both the Mpumalanga Provincial Government and other spheres of government raised and complained about) prompted this study. Constant complaints are leveled against municipalities about appropriate and well qualified candidates being overlooked for employment opportunities at the expense of nepotism, cronyism and blatant corrupt activities. This study is a combination of both quantitative and qualitative methods. In line with the quantitative method of generating and assembling information, the researcher used the judgement sampling method. Questionnaires were administered to collect quantitative data while primary data was collected via interviews. Data was obtained from 45 participants in Thaba Chweu Municipality. The findings show that the majority of respondents (in the form of percentages) spoke against the capacity of the officials. A smaller percentage spoke in favour of the availability of capacity. These respondents stated that municipal officials have the required skills and capacity to perform their duties. Furthermore, the study found that there was inconsistency in the implementation of council resolutions and interference in administrative matters. These factors compromised achieving the objectives of the municipal strategies and policies. The study recommends that the municipality ensures that the human resource management and development departments are consonant with current and modernised needs and that delegations to line functionaries are properly assigned and documented.
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  • Date Issued: 2018

The use of radio frequency identification technology for inventory control in academic libraries in South Africa : a study of the University of South Africa and the University of Fort Hare Library Systems

  • Authors: Reid, Lindsay Frederick
  • Date: 2018
  • Subjects: Libraries -- Inventory control Radio frequency identification systems
  • Language: English
  • Type: Thesis , Masters , MLIS
  • Identifier: http://hdl.handle.net/10353/6314 , vital:29560
  • Description: The study sought to investigate the use of RFID technology as inventory control in academic libraries in South Africa, with a focus on the University of South Africa and the University of Fort Hare libraries. The objectives of the study were to describe the current inventory control practices at the libraries of the University of South Africa and the University of Fort Hare in order to determine the infrastructure required for the use of RFID for inventory control for the University of Fort Hare’s libraries; to evaluate the benefits of RFID technologies, in order to gain a competitive advantage for the University of South Africa’s and the University of Fort Hare’s libraries; to identify the challenges associated with adopting RFID technology, as experienced by the libraries of the University of South Africa and the University of Fort Hare. The study adopted both the quantitative and qualitative research approaches. The researcher followed a rigorous methodological path that began with a thorough literature review coupled with the careful and thoughtful posing of research questions and objectives. A purposive sample of forty (40) respondents was selected from the library staff from both the University of South Africa and University of Fort Harelibraries. The collected data were analysed using the Statistical Package for Social Sciences 23 (SPSS 23) and Microsoft Excel 2010. The findings of the study revealed reasons for both academic libraries to invest in RFID technology; these reasons include RFID’s ability to deliver self-service options, inventory control, improved reader access and improved security. The challenges related to the implementation of RFID technology are also related to staff not being rewarded by library management for being innovative; the difficulty of staff learning new technology; the staff’s inability to generate new ideas for the library; and the staff not being able to share knowledge with each other. Further research needs to be conducted by library RFID vendors in order to meet the need, of academic libraries, for RFID inventory control. RFID hardware and software (API software) should be subjected to further investigation for the purposes of research and development. Libraries should work closer with RFID vendors so as to trial and test hardware and software.
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  • Date Issued: 2018

Home activities promoting mathematical skills in foundation phase : a case study of grandmother-headed households

  • Authors: Hlungulu, Nolukholo Faith
  • Date: 2017
  • Subjects: Home and school -- South Africa -- Case studies Education -- Parent participation -- South Africa -- Case studies Education, Elementary -- South Africa -- Case studies
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: http://hdl.handle.net/10353/4926 , vital:28796
  • Description: Recent factors identified as contributory to poor mathematics performance in South Africa include lack of parental involvement coupled by the divorce of mathematics education to children’s everyday lives. This exploratory study, therefore focused on home activities grandmothers engage their Grade 2 grandchildren that may promote mathematical skills of Foundation Phase learners. This study followed a qualitative, interpretive and case study research design, to explore home activities grandmothers engage their Grade 2 grandchildren that may promote mathematical skills of Foundation Phase learners. A small scale study of six grandmothers and three Grade 2 teachers were sampled through purposive and snowball sampling. In line with the protocol of the case study, semi-structured individual face to face interviews and shadowing were used to collect data. One striking feature of the main findings was the diversity mathematics applications home activities contained. These include physical, financial and fun playful home activities. Data also revealed that these home activities could reinforce numbers and what numbers mean; reinforce shape recognition and spatial relationships; complement matching, classification and sorting and reinforce measuring and time. This implies that curriculum must incorporate children’s social capital. Both teachers and grandmothers acknowledged that children’s mathematics education is complex and an effective partnership between grandmothers and teachers is needed if children are to be competent in mathematics.
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  • Date Issued: 2017

Contributions to the study of a class of optimal control problems on the orthogonal groups SO(3) and SO(4)

  • Authors: Adams, Ross Montague
  • Date: 2015
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/64826 , vital:28608
  • Description: In this thesis we investigate a class of invariant optimal control problems, and their associated quadratic Hamilton-Poisson systems, on the orthogonal groups SO(3) and SO(4). Specifically, we are concerned with the class of left-invariant control affine systems. We begin by classifying all cost-extended systems on SO(3) under cost equivalence. (Cost-extended systems are closely related to optimal control problems.) A classification of all quadratic Hamilton-Poisson systems on the (minus) Lie-Poisson space so(3)*, under affine equivalence, is also obtained. For the normal forms obtained in our classification (of Hamilton-Poisson systems) we investigate the (Lyapunov) stability nature of the equilibria using spectral and energy-Casimir methods. For a subclass of these systems, we obtain analytic expressions for the integral curves of the associated Hamiltonian vector fields in terms of (basic) Jacobi elliptic functions. The explicit relationship between the classification of cost-extended systems on SO(3) and the classification of quadratic Hamilton- Poisson systems on so(3)* is provided. On SO(4), a classification of all left-invariant control affine systems under L-equivalence is obtained. We then determine which of these representatives are controllable, thus obtaining a classification under detached feedback equivalence. We also obtain a partial classification of quadratic Hamilton-Poisson systems on the Lie-Poisson space so(4)*. An investigation of the stability nature of the equilibria for a subclass of these systems is also done. Several illustrative examples of optimal control problems on the orthogonal group SO(3) are provided. More specifically, we consider an optimal control problem corresponding to a representative of our classification (of cost-extended system) for each possible number of control inputs. For each of these problems, we obtain explicit expressions for the extremal trajectories on the homogeneous space S2 by projecting the extremal trajectories on the group SO(3). The examples provided show how our classifications of cost-extended systems and Hamilton-Poisson systems can be used to obtain the optimal controls and the extremal trajectories corresponding to a large class of optimal control problems on SO(3). An example of a four-input optimal control problem on SO(4) is also provided. This example is provided to show how the solutions of certain problems on SO(4) can be related to the solutions of certain optimal control problems on SO(3).
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  • Date Issued: 2015

The interest rate elasticity of credit demand and the balance sheet channel of monetary policy transmission in South Africa

  • Authors: Doig, Gregory Graham
  • Date: 2013
  • Subjects: Monetary policy -- South Africa Banks and banking -- South Africa Bank loans -- South Africa Finance -- South Africa Vector autoregression (VAR) approach to econometric modeling Financial statements Interest rates -- South Africa
  • Language: English
  • Type: Thesis , Masters , MCom
  • Identifier: vital:1052 , http://hdl.handle.net/10962/d1006482
  • Description: It has long been accepted that changes in monetary policy have real economic effects; however, the mechanism by which these policy changes are transmitted to the real economy has been the subject of much debate. Traditionally the transmission mechanism of monetary policy has consisted of various channels which include the money channel, the asset price channel and the exchange rate channel. Recent developments in economic theory have led to a relatively new channel of policy transmission, termed the credit channel. The credit channel consists of the bank lending channel as well as the balance sheet channel, and focuses on the demand for credit as the variable of interest. The credit channel is based on the notion that demanders and suppliers of credit face asymmetric information problems which create a gap between the cost of external funds and the cost of internally generated funds, referred to as the wedge. The aim here is to determine the size and lag length effects of changes in credit demand, by both firms as well as households, as a result of changes in interest rates. A secondary, but subordinate, aim is to test for a balance sheet channel of monetary policy transmission. A vector autoregressive (VAR) model is used in conjunction with causality tests, impulse response functions and variance decompositions to achieve the stated objectives. Results indicate that the interest rate elasticity of credit demand, for both firms and households, is interest inelastic and therefore the monetary policy authorities have a limited ability to influence credit demand in the short as well as medium term. In light of the second aim, only weak evidence of a balance sheet channel of policy transmission is found.
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  • Date Issued: 2013

Hydrological proceses, chemical variability, and multiple isotopestracing of water flow paths in the Kudumela Wetland- Limpopo Province, South Africa

  • Authors: Mekiso, Feleke Abiyo
  • Date: 2011
  • Subjects: Kudumela Wetland -- South Africa -- Limpopo , Wetland hydrology -- South Africa -- Limpopo , Wetlands -- South Africa -- Limpopo , Wetland conservation -- South Africa -- Limpopo , Wetland management -- South Africa -- Limpopo , Isotopes
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:6027 , http://hdl.handle.net/10962/d1006153 , Kudumela Wetland -- South Africa -- Limpopo , Wetland hydrology -- South Africa -- Limpopo , Wetlands -- South Africa -- Limpopo , Wetland conservation -- South Africa -- Limpopo , Wetland management -- South Africa -- Limpopo , Isotopes
  • Description: The hydrology of the Kudumela Wetland, Limpopo Province of South Africa was studied from November 2005 to April 2007, involving both fieldwork and laboratory analyses. This study presents the results of an investigation of the hydrology of the Kudumela Wetland in South Africa, and its contribution to dry season flow in the Mohlapitsi and Olifants Rivers. Initially, 40 Piezometers were installed along seven transects and water levels monitored in order to understand water table level characteristics (fluctuations) with time. Water levels in transects one, three, the right bank portion of transect four and transect six showed fluctuations. Transect two, the left bank portion of transect four and transect five did not show significant temporal changes. The relationships between piezometer water levels, rainfall in the study area and stream flow observed at a river gauging station are not clear. The river within the wetland is a gaining stream because the water table level elevation is above that of the river. This indicates that the wetland is feeding the river. The northern part of the wetland (T1 and T2) is affected by artificial drains and most of the piezometers closest to the river channel showed the lowest variations. The relationships between rainfall, groundwater, and surface water at this site shows that stream flow did not respond quickly to precipitation as expected, even in months when rainfall increased (for example, 74 and 103mm during 08/02/06 and 18/02/06 respectively), and the groundwater levels did not show fluctuations, indicating that groundwater responds gradually to precipitation, and that the relationship between rainfall, groundwater and surface water is complex. The environmental stable isotopes (deuterium and oxygen-18) and the radioactive isotope (tritium) were analyzed, along with field observations of electrical conductivity (EC), pH, total alkalinity (Talka) and some major and minor dissolved ion analyses for tracing water dynamics in the study area. A total of 39 water samples was taken and analyzed from boreholes, auger holes, right bank and left bank drains, various points along the river and springs in four sampling visits to the wetland. The results did not clearly provide a temporal record of isotope and chemical variations in the various sources. Results from the most extensive sampling survey in April 2007 provide the most comprehensive overview of hydrological relationships. Clustering of the stable isotope data suggests that the water samples of upstream and downstream river, auger holes further south and most drains clustered together suggesting a common water source and almost all samples fall above the global (GMWL) and local (Pretoria MWL) meteoric water lines, while some fall between the global and Pretoria meteoric water lines. Six representative water samples were analyzed for major ion concentration. Both cation (Ca, Mg, K, and Na) and anion (HCO3, SO4, Cl, and NO3) analyses in November 2007 confirmed conclusions reached from field observations. The analysis shows that a single type of water (Ca, Mg-HCO3) is involved in the study area. In almost all major ion plots, the right bank drains, upstream river and downstream river samples grouped together in a single cluster. As the means for reliable river flow measurements were not available, except for the gauging station at the outlet of the valley, rough, semi-quantitative estimates were made during several field visits. These, suggest considerable losses of river flow into the gravel/boulder beds at and below a gabion dam at the head of the valley. Three major and several other left bank springs and right bank drains at transects T1 and T2 contributed to the river flow at all times. Along with the isotopic and chemical evidence, these observations have lead to a hypothesis that river water enters the wetland and flows back to the Mohlapitsi River through boulder beds underlying the wetland and through drains on the surface of the argillaceous aquitard covering the more conductive boulder beds. Deeper dolomitic groundwater does not appear to contribute to the water balance at least in the northern half of the wetland. Although environmental isotope and hydrochemistry results may not unequivocally prove this hypothesis they do not contradict it.
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  • Date Issued: 2011

Probing the biocompatibility of biomedical interfaces using the Quartz Crystal Microbalance with Dissipation

  • Authors: Cromhout, Mary
  • Date: 2011
  • Subjects: Biomedical materials , Nanostructured materials , Biomedical engineering , Quartz crystal microbalances , Blood proteins , Nanoparticles
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4102 , http://hdl.handle.net/10962/d1010660
  • Description: The biomedical application of nanotechnology has come into the spotlight, with the promise of ‘personalised’ therapeutics that couple early diagnosis with targeted therapeutic activity. Due to the rapid growth of the biomedical applications of nanoparticles, along with the lack of understanding concerning their interactions with biomolecules, there is a pressing need for the development of standard methods directed at investigating the effect of introducing these unique particles into the human body. The central aim of this research is to establish a platform directed at assessing the biological fate of pioneering therapeutic particulate agents, such as metallophthalocyanines (MPcs) and multi-walled carbon nanotubes (FMWCNTs). In particular, we proposed, that Quartz Crystal Microbalance with Dissipation (QCM-D) technology may be employed to assess the composition of blood protein corona deposited on the therapeutic surface, and subsequently assess the biocompatibility of such particles. The proposed method of protein detection utilises the nanogram sensitivity of QCM-D technology to monitor highly specific antibody-antigen interactions. In particular those interactions which occur when probe antibodies are used to detect adsorbed blood proteins deposited on target particle-modified sensor surfaces. Protein detection analysis was directed toward identification of surface bound human serum albumin, complement factor C3c, and human plasma fibrinogen. Preliminary analysis of generic biomedical surfaces indicated human serum albumin demonstrates a higher binding affinity towards positively charged surfaces (i.e. cysteamine self-assembled monolayer), followed by hydrophobic surfaces. Detection of complement C3c, corresponded with literature, where lower levels were detected on negatively charged surfaces (i.e. mercapto undecanoic acid self-assembled monolayer), and higher levels of more hydrophobic surfaces (i.e. 11-amino undecane thiol self-assembled monolayer). Human plasma fibrinogen was observed to favour hydrophilic over hydrophobic self-assembled monolayer surfaces, which was in accordance with literature. Application of the proposed protein detection method for biocompatibility analysis of target therapeutic molecules, namely metallophthalocyanines and acid functionalised multi-walled carbon nanotubes, demonstrated a dependence on modified-surface film characteristics, such as surface charge and topography with regards to human serum albumin and human plasma fibrinogen analysis representing new insights into their potential biomolecular interactions The highest levels of detected human serum albumin and complement C3c were detected on the GePcSmix-modified surfaces. AlPcSmix-modified surfaces analysis suggested the highest levels of human plasma fibrinogen. Two methods of acid functionalisation were employed, using both nitric and sulphuric acid, and pure nitric acid. A general increase in detected human serum albumin, corresponding with an increase in functionalisation time, was observed. Complement C3c detection suggested an increase in deposited complement C3c, with increasing functionalisation time, when assessing nitric acid functionalised multi-walled carbon nanotubes, and a decrease, with increasing functionalisation time, when assessing nitric and sulphuric acid functionalised multi-walled carbon nanotubes. Analysis of human plasma fibrinogen was inconclusive, as were cytotoxicity experiments utilising MCF-7 cells in the presence of metallophthalocyanine complexes, raising simultaneously important considerations for their application and study. In the first such detailed examination of its kind it was concluded that the proposed method of protein detection, using QCM-D, allows for the rudimentary but rapid means of analysis of select protein corona deposited on particulate biomedical surfaces.
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  • Date Issued: 2011

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

Patterns and determinants of species richness in mesic temparate grasslands of South Africa

  • Authors: Hoare, David Barry
  • Date: 2009
  • Subjects: Grassland ecology -- South Africa -- Eastern Cape , Plant diversity -- South Africa -- Eastern Cape , Vegetation and climate
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:10613 , http://hdl.handle.net/10948/1275 , Grassland ecology -- South Africa -- Eastern Cape , Plant diversity -- South Africa -- Eastern Cape , Vegetation and climate
  • Description: The aim of this study is to gain a predictive understanding of the patterns and determinants of plant biodiversity in temperate, mesic grasslands of South Africa with a primary focus on the geographical area of the Eastern Cape. From a review of the literature on hypotheses explaining diversity (Chapter 2) it was possible to formulate a number of hypotheses that could be tested to explain species richness patterns in Eastern Cape grasslands. This thesis is organised so that each main chapter deals with a specific body of theory concerning the explanation of diversity patterns. A detailed description of the study area is provided (Chapter 3), including environmental variation and a description of major vegetation patterns. A summary is provided of grassland plant community patterns, as determined by phytosociological studies in the study area. A multivariate analysis of environmental variables was undertaken to determine which variables contributed the most towards explaining environmental variation in the study area and to determine whether any variables co-vary, a possible problem for any multivariate analysis in later chapters. Altitude produced one of the strongest gradients in the study area. There were a number of variables that were correlated with altitude, most notably temperature. Rainfall co-varied partially with altitude, but there was also a strong rainfall gradient perpendicular to the altitude gradient. A description of species richness, diversity and evenness patterns at the plot scale within different grassland plant communities of the Eastern Cape is provided in Chapter 4. To determine whether the environment acts differently on different growth forms, the contribution to species richness by different major growth forms is analysed. Furthermore, since the majority of literature attempts to explain diversity in terms of environmental factors, it was necessary to analyse the relationship between species richness and various environmental variables. The results indicate that there is high variation in species richness both within and among grassland communities. Forbs make the most significant contribution to overall species richness per 100 m2, followed by grasses. Variance in richness of all species together is not significantly related to environmental variables in mesic grasslands, but is significantly related to environmental variables in semi-arid grasslands. The result of greatest interest from this chapter is the fact that richness amongst different life-forms in the same place is explained by different environmental factors, indicating that the environmental factors that affect coexistence of species have a different effect on different life-forms. A classification of all the species of the dataset into plant functional types using a multivariate approach based on functional traits was conducted (Chapter 5). The grass species were classified into 16 functional types and the forbs into 14 functional types. The functional type classification provided the opportunity for undertaking analyses to develop an understanding of 8 the contribution by niche differentiation towards promoting species richness (Chapter 6). The results provide evidence of niche differentiation in the grasslands of the study area and also that niche differentiation promotes species richness in the grasslands of the study area. It was found that higher rainfall grasslands are less structured by niche differentiation than semi-arid grasslands. A regional / historical analysis is undertaken (Chapter 7) to investigate the relationship between the regional species pool and local richness, and the relationship between local richness and phytochorological diversity. Regional richness appears to have little effect in promoting local richness in grassland plant communities of the study area except at sites where there is high local richness. This provides an indication that regional richness only promotes local richness in the absence of local limiting factors. Phytochorological diversity promotes local richness, but mostly through diversity amongst species with narrow distribution ranges. Some theories ascertain that seasonal uncertainty may provide opportunities to species that would otherwise be outcompeted and thereby promote local richness. The degree to which seasonal uncertainty and seasonality promote local richness in the Eastern Cape grasslands was therefore investigated (Chapter 8). A weak relationship exists between these variables and local species richness in grassland communities of the study area, indicating that they do not promote niche differentiation to a significant degree in the study area. It is clear that in the grasslands of the Eastern Cape, environmental limiting factors are more important in semi-arid grasslands and species interactions are more important in mesic grasslands for structuring plant communities (Chapter 9, Discussion). Regional processes do not appear to be important in structuring local communities, but the analysis undertaken in this study shows that they may be significant when factors operating at the other two levels are overcome (species interactions and environmental limiting factors.
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  • Date Issued: 2009

Reconstructing ionospheric TEC over South Africa using signals from a regional GPS network

  • Authors: Opperman, B D L
  • Date: 2008
  • Subjects: Global Positioning System Global Positioning System -- Data processing Electrons -- South Africa Ionosphere -- South Africa Ionospheric radio wave propagation -- South Africa
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5487 , http://hdl.handle.net/10962/d1005273
  • Description: Radio signals transmitted by GPS satellites orbiting the Earth are modulated as they propagate through the electrically charged plasmasphere and ionosphere in the near-Earth space environment. Through a linear combination of GPS range and phase measurements observed on two carrier frequencies by terrestrial-based GPS receivers, the ionospheric total electron content (TEC) along oblique GPS signal paths may be quantified. Simultaneous observations of signals transmitted by multiple GPS satellites and observed from a network of South African dual frequency GPS receivers, constitute a spatially dense ionospheric measurement source over the region. A new methodology, based on an adjusted spherical harmonic (ASHA) expansion, was developed to estimate diurnal vertical TEC over the region using GPS observations over the region. The performance of the ASHA methodology to estimate diurnal TEC and satellite and receiver differential clock biases (DCBs) for a single GPS receiver was first tested with simulation data and subsequently applied to observed GPS data. The resulting diurnal TEC profiles estimated from GPS observations compared favourably to measurements from three South African ionosondes and two other GPS-based methodologies for 2006 solstice and equinox dates. The ASHA methodology was applied to calculating diurnal two-dimensional TEC maps from multiple receivers in the South African GPS network. The space physics application of the newly developed methodology was demonstrated by investigating the ionosphere’s behaviour during a severe geomagnetic storm and investigating the long-term ionospheric stability in support of the proposed Square Kilometre Array (SKA) radio astronomy project. The feasibility of employing the newly developed technique in an operational near real-time system for estimating and dissimenating TEC values over Southern Africa using observations from a regional GPS receiver network, was investigated.
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  • Date Issued: 2008

The intermediary function of NGOs in HIV/AIDS responses : a case study of the Lady Frere district of the Eastern Cape

  • Authors: Mayekiso, Andile
  • Date: 2008 , 2013-07-11
  • Subjects: HIV infections -- South Africa -- Eastern Cape AIDS (Disease) -- South Africa -- Eastern Cape Non-governmental organizations -- South Africa -- Eastern Cape Community organization -- South Africa -- Eastern Cape HIV infections -- Social aspects -- South Africa -- Eastern Cape AIDS (Disease) -- Social aspects -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:3354 , http://hdl.handle.net/10962/d1007584
  • Description: The HIV/AIDS epidemic has serious effects on society. It has been described as the biggest threat to the development of South Africa, with severe economic, social and human impact. In the Lady Frere District in the Eastern Cape Province, like in many other areas that are greatly affected by the epidemic in this country, young people are considered by the local Department of Health to be a particularly vulnerable group due to various predisposing biological, social, cultural, and economical factors. Despite the efforts that have been made to educate and encourage prevention, especially by the local Masibambane Non-governmental Organisation (MNGO) to inform these communities about the dangers of the epidemic, people's behaviour have been slow to change and the disease continues to spread. This research is conducted against the escalating HIV / AIDS pandemic in the Lady Frere District. The fundamental aim of this project is to examine the intermediary function of the MNGO in HIV/AIDS responses. The study seeks to evaluate the way in which this local NGO operates on the ground in contributing to a community's response to the HIV/AIDS pandemic. In other words, the thesis tries to indicate how this local NGO, in dealing with the HIV/AIDS issue, interfaces with the community and related stakeholders. It examines how young people in the Lady Frere District perceive HIV/AIDS. A literature review demonstrates that the specific aims and objectives of this project represent a fairly new area of research in South Africa. I propose in the thesis that a simple act of joining and being regularly involved in a community organisation such as the MNGO will have significant impact on individuals' health and well-being. The thesis is crying for a need to restore the notion of "ubuntu" (meaning humanity) which is fundamentally based on social capital to assist these communities to rebuild trust which is essential in people living with HIV/AIDS. Based on my assessment it seems that intermediary NGOs, like the traditional NGOs and the private sector, will have little impact in terms of changing the conditions of the poor and the marginalised people. This is because in practice, like the conventional NGOs, intermediary NGOs serve the interests of donors and national governments or those who give them financial support to continue existing.
  • Full Text:
  • Date Issued: 2008

An investigation of how environmental learning and teaching support materials (LTSM) can influence team planning and teaching and learning activities in the Foundation Phase

  • Authors: Mdlungu, Nozuko Gloria
  • Date: 2007
  • Subjects: Education, Elementary -- South Africa Environmental education -- Study and teaching (Elementary) -- South Africa Teaching -- Aids and devices -- South Africa Curriculum change -- South Africa Competency-based education -- South Africa Curriculum-based assessment -- South Africa Curriculum planning -- South Africa
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1630 , http://hdl.handle.net/10962/d1003512
  • Description: South Africa has experienced significant curriculum transformation over the past ten years. Environment was introduced into C2005 as a phase organiser. Following the streamlining and strengthening of the curriculum, the National Curriculum Statement (NCS) has a more explicit environmental focus in all of the Learning Areas. This has created opportunities for teachers to address environmental health issues in a community context. I work in a rural school and the community around the school experience a number of environmental health issues. In my previous observations I noticed that teachers were not using Learning Teaching Support Materials (LTSM) effectively. In this study I wanted to investigate how LTSM can be used to address environmental health issues in the Foundation Phase. As Life Orientation Learning Outcome1 is a ‘backbone’ of the Life Skills Learning Programme in the Foundation Phase, I decided to focus on this Learning Outcome as it is the Health Promotion outcome in the NCS (R-9). It was my interest to investigate how LTSM are used in team planning and how this planning influences the use of LTSM in classrooms. In the research I observed the link between the activities and LTSM that were discussed in the planning session and those that were done in the classroom. To do this I documented the planning workshop, and I also observed three lessons undertaken in two classrooms, a grade 2 and a grade 3 classroom in my school, where I serve as a principal. I conducted this research as an interpretive case study, and I used workshop, interviews, focus group interviews and classroom observation as methods in the study. The study found that LTSM used in planning influences activities done in the classroom. It also found that use of LTSM helps to achieve the Learning Outcomes and Assessment Standards, and to improve the participation of learners in the learning process. Use of LTSM in planning also improves teachers’ Learning Area knowledge and their knowledge of curriculum development issues. Planning sessions also assisted teachers to address problems such as language used in LTSM and availability of LTSM. The study also found that teachers did not address formal assessment in the planning or in the way they used LTSM. The study concluded that use of LTSM in planning can strengthen classroom practice, and recommendations were made to take this work forward in the context of our school, as it addresses the gap between policy and practice.
  • Full Text:
  • Date Issued: 2007

A study of recruitment and selection policies with specific reference to the Sundays River Valley Municipality

  • Authors: Singanto, Nkosiyabo King
  • Date: 2002
  • Subjects: Employee selection -- South Africa
  • Language: English
  • Type: Thesis , Masters , MTech (Public Management)
  • Identifier: vital:10773 , http://hdl.handle.net/10948/141 , Employee selection -- South Africa
  • Description: In this dissertation, a study is undertaken of recruitment and selection policies with specific reference to the Sundays River Valley Municipality. The dissertation comprises of six chapters. The study is based on the assumptions that the Sundays River Valley Municipality does not have adequate recruitment and selection policies in place and that no clear division of duties has been made between councillors and officials with respect to the employment processes. Another assumption is that with better recruitment and selection policies in place, the Sundays River Valley Municipality will attract the best possible candidates for posts and better service delivery to communities. Further, this study is based on the assumption that in order for councillors and officials to be able to execute their duties effectively and efficiently and meet the requirements of the laws governing local government, they need to be knowledgeable and possess special skills and expertise. The primary objectives of the research included, inter alia, an investigation into theoretical processes of recruitment and selection policies with specific reference to the Sundays River Valley Municipality and motivation why the municipality needs to adopt formal guidelines to guide its recruitment and selection processes. This was followed by the constitutional and legislative measures affecting local government. The empirical survey and the research methodology are described as well as the interpretation of the research findings. This is followed by an explanation of the survey questionnaire used for the accumulation of data needed for the analysis. The research findings of the empirical survey were statistically analysed and reported. Finally, a number of conclusions are presented that were arrived at during the study, followed by specific recommendations. These are based on the findings of the empirical survey in order for Sundays River Valley Municipality councillors and officials to adopt formal guidelines to guide its recruitment and selection processes.
  • Full Text:
  • Date Issued: 2002

Exploring the suitability of the evaluation criteria used in the MPT projects, by looking at hard and soft components of development programmes

  • Authors: Ncapai, Wandile
  • Date: 2002
  • Subjects: Community development -- South Africa -- Eastern Cape , Community development , Economic development -- South Africa -- Eastern Cape , Economic development projects -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MSocSc
  • Identifier: vital:3397 , http://hdl.handle.net/10962/d1018255
  • Description: The study explores the suitability of the evaluation criteria used in Microprojects Programme Trust (MPT), by looking at hard and soft components of the development programme. In this sense hard components of development refer to those components of projects that are tangible and can be physically observed and can bring material changes to the life of the community. Soft components of development refer to those components of projects that bring qualitative transformation to the life of the community, i.e. increased levels of awareness, human well-being and the empowerment process that addresses the community's abstract needs, these are not tangible and often cannot be physically observed. Midway through its contract periods MPT evaluate all projects. The purpose of these mid term evaluations is to make recommendations to MPT on future approaches and methodology for community development and operations. The mid-term evaluation also influences the distribution and allocation of resources and funding. It was therefore vital that the criteria used are subject to tests and critical analysis so as to assess their validity. The assessment of the mid-term evaluation criteria used in MPT projects has been to further determine the appropriateness or suitability of the evaluation criteria as an instrument to measure and guide the MPT community development approach in the Eastern Cape. The method used was to conduct focus group discussions so as to get an insight into the local community situation as well as to assess non-tangible improvements and changes that have occurred in the life of the community as a result of the project. The information generated was used to compare what the community believe they achieved with what the official mid-term evaluation reports indicate was assessed and achieved and that was contrasted with what the literature recommends should have been assessed. The study found that the mid-term evaluations conducted on MPT projects have no social context in which the evaluations themselves were conducted. The terms of reference and criteria were based on the programme design which was formulated and compiled by the European Union without the participation of the local South African community. The findings also indicated that projects become unsuccessful or partly successful if the "soft" components which have a bearing on social and economic realities are neglected. The thesis ends with recommendations on how the mid-term evaluations as well as MPT programme can be developed to be more responsive to the needs as identified by the communities themselves. It is strongly believed that this study will provide a valuable contribution towards increasing the ability of MPT programme to bring about both material and qualitative transformation to the I ives of the disadvantaged community of the Eastern Cape whilst ensuring that the mid-term evaluations are developed and shaped to become an appropriate instrument to measure and guide MPT programme approach to community development.
  • Full Text:
  • Date Issued: 2002

The use of investigative methods in teaching and learning primary mathematics in Lebowa schools : a case study

  • Authors: Sebela, Mokgoko Petrus
  • Date: 1999
  • Subjects: Mathematics -- Study and teaching (Primary) -- South Africa -- Northern Province -- Case studies Mathematics -- Study and teaching (Primary) -- South Africa -- Northern Province
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1814 , http://hdl.handle.net/10962/d1003700
  • Description: This is a report on research conducted in Lebowa (Northern Province) Primary Mathematics Project schools. In view of the high failure rate of matric students, the researcher believes that it is necessary that ways should be devised to improve mathematics understanding from the first level of schooling. A research study was made of constructivist and investigative teaching and learning methods as employed by teachers in a number of primary schools in the area. The researcher believes that investigative and constructivist teaching approaches produce better results than the traditional approach. He further believes that children learn better in a co-operative non-threatening classroom environment. A pilot study was made with two experimental schools and two control schools. The schools were selected from both urban and rural areas. The experimental schools are operating under the PMP and the control schools are not. The experimental schools are also supported by expert teachers called key teachers. Many of these key teachers have attended courses at Leeds University, while others have been trained locally in the theory and practice of constructivist and investigative teaching and learning. Chapter 3 illustrates clearly what is done in the Project schools. The methodology employed in the research included qUestionnaire responses from 174 teachers. Written tests by four schools (350 pupils), and interviews with 55 people, including directors of education, inspectors, principals, teachers and parents. Observations in classes were also done. Another questionnaire was given to 484 pupils. The tests were mitten on two occasions: an initial test was written during November 1993, the second year of the PMP project, while a second test was written the following year. Data collected was analysed and positive results obtained. The results from the tests indicated that pupils in experimental schools where constructivist and investigative approaches are used, perform better than those from schools where the traditional approach is still used. They indicated that children in PMP schools develop a better understanding of mathematics. This would seem to indicate that the constructivist and investigative approach to teaching produces better results than the traditional approaches. The reader will find graphs indicating the results and their analysis in Chapters 4 and 5. It is recommended by the researcher that: - Constructivist and investigative teaching and learning methods be introduced to all schools. - The services of key teachers be supported by the Department - The Department should equip all schools with the necessary materials for proper teaching and learning, or provide materials for schools to make their own teaching aids. - Teachers be involved with materials production where they are given guidance on how teaching aids can be made. - The curriculum for primary school mathematics be revised and changed, especially in view of the fact that at present it does not cater for local needs. It was planned by whites and it caters mainly for those with an European cultural background.
  • Full Text:
  • Date Issued: 1999

A geographical study of agricultural change since the 1930s in Shixini Location, Gatyana district, Transkei

  • Authors: Andrew, Maura
  • Date: 1992
  • Subjects: Agriculture -- South Africa -- Transkei Land tenure -- South Africa -- Transkei Transkei (South Africa) -- Rural conditions
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:4834 , http://hdl.handle.net/10962/d1005509
  • Description: This study examines the dynamics of agricultural change amongst traditional African smallholder farmers in Shixini location, Gatyana District, Transkei. This entailed an examination of the historical, regional and local causes of agricultural change and the response of the local community. What became evident was that there had been a gradual decline in agricultural output after the 1930s due to a combination of socio-economic and environmental constraints. Pressure on limited resources and land degradation, a consequence of socio-economic pressures on the African peasantry and agricultural expansion, reduced carrying capacities and soil fertility within the African reserves. Racially discriminatory policies also reduced African access to agricultural markets and forced peasants into migrant labour. The initial response to this agricultural decline was to maintain cultivation and pastoral practices, despite declining output, and rely more heavily on migrant labour. However, massive population ~owth from the mid 1950s onwards stimulated a rapid change in cultivation practices. Rural households found it increasingly difficult to gain access to arable land in river valleys and growing poverty undermined their ability to cultivate fields. In response to these conditions the rural population abandoned their fields and expanded garden cultivation. Garden cultivation was a more intensive method of cultivation which made more efficient use of household resources, maintained long-term yields and had a less detrimental impact on the soil. This study attempts to make a contribution to southern African historiography and historical geography. Since the rise of radical human geography in the 1970s there has been a growing number of political economy studies focusing on capitalist expansion, racially discriminatory state policies and associated class conflicts in South Africa. However, most of these studies have focused on urban communities. The political economy of African rural areas has been sorely neglected by human geographers despite the enormous growth of such studies amongst historians and other social scientists. This study of agricultural change in Shixini location, Transkei adds to the small collection of geographical research on the political economy of African rural areas. It also adds to the large body of historical research by focusing on the recent past, a much less well documented period. The most important component of the study was an examination of the response of the rural community to socio-economic and environmental changes. This brought the often neglected role of human agency within the world political economy into the study. Environmental factors, often neglected by'historians and human geographers, were also brought into the analysis. The examination of such a broad range of factors was facilitated through the use of a wide variety of source material including historical, anthropological and socio-economic literature, official statistics, archival records, aerial photographs and a sample survey
  • Full Text:
  • Date Issued: 1992

Chemical and spectroscopic studies of the capsular polysaccharides of some klebsiella and escherichia coli serotypes

  • Authors: Stanley, Shawn Mark Ross
  • Date: 1990
  • Subjects: Polysaccharides , Klebsiella , Escherichia
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:3736 , http://hdl.handle.net/10962/d1001525
  • Description: The work described in this thesis forms part of an international programme concerned with the structure elucidation of the capsular antigens of some Enterobacteriaceae. Many of the Klebsiella and some of the Escherichia coli are pathogenic to man and, hence, they are of interest. The virulence of bacteria is a multifactorial phenomenon, in which characteristic traits of bacteria and their hosts play comparable and complementary roles. It is accepted that pathogens are more virulent when encapsulated, because, nearly all disease causing bacteria have a capsule when freshly isolated from the host. This increase in pathogenicity is related, in part, to the capsular polysaccharides' ability to avoid or attenuate the host defence mechanisms. In the majority of cases the protective aspects of the capsule are overcome in the latter stages of infection when the formation of specific antibodies by the host has occurred. However there are situations in which an immune state of the infected host is virtually never reached, and susceptiblity to the infecting bacteria is maintained even in the advanced stage of an infection. Explanation of this phenomenon becomes possible by analysing the structure of the polysaccharides. The inability of the host to raise an immune response to the capsule may be because the structure of the polysaccharide is similar or identical to the host's carbohydrates. The serological and pathogenic relatedness of encapsulated E. coli and Klebsiella, to the encapsulated strains of other genera, is based on structural identity or similarity of the respective capsules. Capsular polysaccharides are analysed by both chemical and instrumental methods, and, at present, nuclear magnetic resonance spectroscopy is the most important analytical technique
  • Full Text:
  • Date Issued: 1990

High-performance liquid chromatographic studies of the acid degradation, pharmacokinetics and comparative bioavailability of erythromycin

  • Authors: Glew, Fiona
  • Date: 1989
  • Subjects: High performance liquid chromatography , Erythromycin -- Analysis , Erythromycin -- Pharmacokinetics , Erythromycin -- Bioavailability
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3737 , http://hdl.handle.net/10962/d1001529
  • Description: Erythromycin is a macrolide antibiotic with a spectrum similar to penicillin and is used mainly in the treatment of infections caused by gram-positive organisms. Since its discovery in 1952, erythromycin has achieved wide-spread clinical use. Susceptibility of erythromycin base to inactivation by acid results in decreased availability following exposure to acidic gastric fluids. Formulation of acid resistant dosage forms and the preparation of acid stable chemical derivatives have been attempted to improve absorption and subsequent clinical efficacy . Two of the most commonly used erythromycin derivatives are the stearic acid salt (erythromycin stearate) and the lauryl sulphate salt of the propionyl ester (erythromycin estolate). Although it has been known for many years that erythromycin is susceptible to acid degradation, very few reports on the stability of erythromycin in aqueous solutions appear in the literature. In this study, a high-performance liquid chromatographic system using electrochemical detection was employed for a kinetic study of erythromycin degradation. The effect of varying acid pH on the degradation rate of both erythromycin base and erythromycin stearate, and the effect on the hydrolysis rate of erythromycin estolate is presented. In addition, the effect of temperature on erythromycin degradation was also investigated. Until recently, the majority of pharmacokinetic and bioavailability studies have utilized relatively non-specific microbiological assay procedures. However, in this study a solid phase extraction, followed by the use of a high-performance liquid chromatographic system using electrochemical coulometric detection was employed for the determination of erythromycin in biological fluids. Human volunteers each received enteric coated erythromycin base pellets in capsule dosage form and also film coated erythromycin stearate tablets on separate occasions. Results from the clinical trials revealed the enteric coated erythromycin base pellets had a greater bioavailability than the film coated erythromycin stearate tablets. Computer fitting of data revealed no intra-volunteer variability in elimination rate constants, suggesting differences in serum levels following administration of both dosage forms are due to variation in absorption. Results from the clinical trials were also compared with those obtained from a further trial, during which the same volunteers received erythromycin estolate
  • Full Text:
  • Date Issued: 1989
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