Showing items 161 - 180 of 370

Your selections:

Effect of salinity on oxygen consumption and growth of juvenile white steenbras, litohognathus lithognathus

  • Authors: Kandjou, Kaunahama
  • Date: 2008
  • Subjects: Lithognathus -- Growth , Salinity
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5275 , http://hdl.handle.net/10962/d1005119 , Lithognathus -- Growth , Salinity
  • Description: A stress-induced increase in metabolic rate of fish consumes energy within the metabolic scope of a fish that could otherwise be used for such functions as growth and reproduction. By estimating the degree of the metabolic response under given salinity levels and sudden changes thereof, it could be tested whether growth under given culture conditions could be predicted. Using intermittent respirometers, this study investigated the metabolic response of juvenile Lithognathus lithognathus following gradual acclimation to 5, 25 and 35‰ and, as a result of abrupt change from 35‰ to 5‰ or from 35‰ to 25‰ at 20˚C. The main aim of the study was to establish whether the magnitude of such responses could be used to predict growth of juvenile L. lithognathus under culture conditions. Hence, in addition to the respirometry study, two growth studies were conducted at 5, 10, 25 and 35‰ salinities. The baseline metabolic rates of juvenile L. lithognathus were also determined. Oxygen consumption measurements over 24-hours showed that most fish exhibited a diurnal peak in metabolic rates. The standard and active metabolic rates calculated from juvenile L. lithognathus with a diurnal peak in oxygen consumption were 0.06±0.001mgO₂g⁻¹h⁻¹ (mean±SEM, n = 5), and 0.11±0.01mg O₂g⁻¹h⁻¹, respectively. The standard and active metabolic rates of juvenile L lithognathus showing a nocturnal peak in metabolic activities were 0.04±0.001mgO₂g-1h-1 (n = 1), and 0.12±0.003 mg O₂g⁻¹ h⁻¹, respectively. Routine metabolic rate of these fish calculated over a 3-h measurement period was 0.09±0.005mgO₂g⁻¹h⁻¹ (n = 6). Juvenile L. lithognathus showed a relationship between metabolic rate (mo₂) and body weight (W) following the equation: mo₂ = 0.62 W⁻°·⁵³.
  • Full Text:
  • Date Issued: 2008

Effects of sheep kraal manure and intercropping with maize on growth, nutrient uptake and yield of a vegetable Amaranthus accession in the central region of the Eastern Cape, South Africa

  • Authors: Mhlontlo, Simphiwe
  • Date: 2008
  • Subjects: Intercropping , Amaranths , Traditional farming , Manures
  • Language: English
  • Type: Thesis , Masters , MSc Agric (Crop Science)
  • Identifier: vital:11864 , http://hdl.handle.net/10353/76 , Intercropping , Amaranths , Traditional farming , Manures
  • Description: Amaranthus is among the nutritious indigenous plant species that are gathered from the wild in the Eastern Cape to prepare a traditional meal known as ‘imifino’ or ‘isigwampa’ to supplement the necessary proteins, vitamins and minerals which are poor in maizebased meals. Amaranthus species are adapted to wild conditions unsuitable for exotic vegetables and could be cultivated but information on its fertility requirements, as sole or intercrop, is the key for its domestication and production as a leafy vegetable, particularly where manure is used. Two dry-land and one glasshouse experiments were conducted to study the effects of sheep kraal manure application rate, intercropping with maize and soil type on growth, fresh and dry matter yields, nutrient uptake and grain yield of a local Amaranthus accession that grows wild in the Eastern Cape. Sheep kraal manure rates ranging from 0 to 10 t ha-1 and an NPK {2:3:4(30) + 0.5% Zn} fertilizer as a positive control, applied at rates recommended for spinach, were tested. In the Gqumahashe experiment, where Amaranthus was grown as a sole crop, low manure rates (≤ 2.5 t ha-1) resulted in plant heights and fresh matter yields which were comparable to those in the unfertilized control, whereas higher rates (5 and 10 t ha-1) and recommended NPK fertilizer had higher levels both at 30 and 60 days after transplanting (DAT) at p < 0.05. At 30 DAT, manure application rates of ≥ 2.5 t ha-1 and the NPK fertilizer treatment, produced greater shoot dry-matter yields (29.35, 30.75 and 37.68 g plant-1) than the unfertilized control (17.11 g plant-1) at p < 0.05. Uptake of N and P in the leaves increased with increase in manure application rate with N uptake reaching a maximum (308 mg plant-1) at a manure rate of 2.5 t ha-1 which corresponded with the maximum dry matter yield. There was no effect of manure rate or fertilizer on residual soil N and Ca, whereas P, K, Mg and Zn increased. In a pot experiment with soils from Ntselamanzi and Gqumahashe Villages, manure rates ≥ 2.5 t ha-1 resulted in plant heights and fresh matter yield that compared well with the NPK fertilizer treatment in the Gqumahashe soil whereas only the 10 t ha-1 manure treatment was comparable to the NPK fertilizer treatment in the Ntselamanzi soil. Only treatments with ≥ 5 t ha-1 manure had stem girth (1.00 and 1.07 cm) that compared well to NPK fertilizer (1.03 cm) in the Ntselamanzi soil whereas in the Gqumahashe soil, all manure levels compared well to NPK fertilizer (1.02 cm). However, no significant difference was observed in plant height and stem girth and fresh matter due to soil type. In both soils, the 1.3-10 t ha-1 manure treatments had dry leaf weight comparable to plants fertilized with NPK fertilizer (3.72 g plant-1 for the Ntselamanzi soil and 3.65 g plant-1 for the Gqumahashe soil) and were bigger than the unfertilized control (2.2 g plant-1 for the Ntselamanzi soil and 1.38 g plant-1 for the Gqumahashe soil) at p < 0.05. Uptake of N, P and K increased as result of manure application but nonetheless, it was less when compared to plants fertilized with NPK fertilizer in both soils. In a field intercropping experiment carried out at Ntselamanzi, growth and yield of sole and intercropped Amaranthus plants grown with manure improved when compared to the unfertilized control and compared well to NPK fertilizer. At 30 days after transplanting (DAT), both sole and intercropped plants grown with ≥ 2.5 t ha-1 manure had fresh and dry matter yield comparable to plants fertilized with NPK fertilizer. At 60 DAT, intercropped plants grown with all manure levels had bigger fresh matter yield when compared to unfertilized control (836.0 g plant-1) whereas for sole cropped plants only those grown with ≥ 2.5 t ha-1 compared to NPK fertilizer (1467.7 g plant-1) at p < 0.05. Uptake of N, P, K, Ca and Mg increased with increase in manure application in both sole and intercropped Amaranthus. Whereas Amaranthus did not suffer from the competition in the intercrop, maize biomass and grain yield were severely reduced with the effects being evident after 60 DAT. Based on results of this study, it is therefore suggested that, if Amaranthus is to be intercropped with maize under dry land conditions of the Central Region of the Eastern Cape, sheep manure should at least be applied at rate of ≥ 2.5 t ha-1 and Amaranthus be harvested at 30 DAT.
  • Full Text:
  • Date Issued: 2008

Environmental health work methods and procedures for the surveillance and control of avian influenza in the Eastern Cape Province, South Africa

  • Authors: Elie, Sammy Abraham
  • Date: 2008
  • Subjects: Avian influenza -- Eastern Cape -- South Africa -- Prevention , Environmental health -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:9834 , http://hdl.handle.net/10948/947 , http://hdl.handle.net/10948/d1009648 , Avian influenza -- Eastern Cape -- South Africa -- Prevention , Environmental health -- South Africa -- Eastern Cape
  • Description: Avian influenza is an infectious disease of birds caused by the Type A strain of the influenza virus. The disease, which was first identified in Italy more than 100 years ago, occurs worldwide (World Health Organization, 2006a). The current outbreak of the highly pathogenic avian influenza A (H5N1), which began in Southeast Asia in mid-2003, is the largest and most severe on record. Never before in the recorded history of this disease have so many countries been simultaneously affected. Since the last pandemic in 1968-1969, the risk of an influenza pandemic has not been considered greater than at the present time. The importance of intervention strategies had become increasingly evident throughout the world. The World Health Organization provides a generic outline for preparedness plans to assist countries in their preparations to respond to a possible avian influenza pandemic. These guidelines may be modified as the epidemiology of avian influenza evolves. The South African National Department of Health has developed national guidelines in the form of an avian influenza preparedness plan. These draft guidelines do not provide detailed Environmental Health work methods and - procedures for the effective surveillance and control of the disease. The general purpose of this study is to develop a standardised set of Environmental Health work methods and - procedures, which will contribute to the effective surveillance and control of avian influenza in the Eastern Cape province – South Africa. Within the context of the purpose of this study, a qualitative, explorative, descriptive, inductive and deductive research design will be used. The methods of data collection will be documentary research, telephonic as well as in-depth personal interviews. In this study, documentary research will be the primary method of data collection. With a qualitative approach, the researcher will be the human instrument for data analysis. The process of qualitative data analysis will be based on data reduction and interpretation; and will be conducted as an activity simultaneously with data collection, data interpretation and narrative reporting writing.
  • Full Text:
  • Date Issued: 2008

Equiprime near-rings

  • Authors: Mogae, Kabelo
  • Date: 2008
  • Subjects: Near-rings
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:10505 , http://hdl.handle.net/10948/1028 , Near-rings
  • Description: Prior to 1990, the only well known ideal-hereditary Kurosh-Amitsur radicals in the variety of zero-symmetric near-rings were the Jacobson type radicals Iv(N) , where ∨∈{2,3} and the Brown-McCoy radical. In 1990, Booth, Groenewald and Veldsman introduced the concept of an equiprime near-ring which leads to an ideal-hereditary Kurosh-Amitsur radical in N∘. The concept of an equiprime near-ring generalizes the concept of a prime ring to near-rings. Although the search for more ideal-hereditary radicals of near-rings was apparently the original motivation for the introduction of equiprime near-rings, it became clear that these near-rings are interesting in their own right. It is our aim in this treatise to give an exposition of the many interesting properties of equiprime near-rings. We begin with a brief reminder of near-ring rudiments; giving basic definitions and elementary results which are necessary for understanding and development of subsequent chapters. With the basics out of the way, our main task begins with a consideration of equiprime, strongly and completely equiprime left ideals. It is noted that any zero-symmetric near-ring can be embedded in an equiprime near-ring. Moreover, the class of equiprime near-rings is shown to be hereditary. Open questions arising out of the study of equiprime near-rings are highlighted along the way. In Chapter 3 we consider well known examples of near-rings and determine when such near-rings are equiprime. This provides more insight into the nature of equiprime near-rings and is a fertile ground for the birth of examples and counterexamples which may be used to close or solve some open question within the literature. We also prove some results which generalize some results of Booth and Hall [10] and Veldsman [29]. These results have not been previously presented elsewhere to the best of our knowledge. vii In Chapter 4, the equiprime near-rings are shown to yield an ideal-hereditary radical in N∘. It is shown that a special radical theory can be built on the equiprime nearrings in much the same way prime rings are used in ring theory to define special radical classes of rings.
  • Full Text:
  • Date Issued: 2008

Evaluating service quality at George Municipality : a complaints management systems approach

  • Authors: Alcock, Sandra
  • Date: 2008
  • Subjects: Consumer complaints -- South Africa -- George , Consumer satisfaction -- South Africa -- George , Customer services -- Management , Local government -- South Africa -- George
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8717 , http://hdl.handle.net/10948/917 , Consumer complaints -- South Africa -- George , Consumer satisfaction -- South Africa -- George , Customer services -- Management , Local government -- South Africa -- George
  • Description: The search for service and product quality has come to the forefront of business studies as the most important consumer trend of the past two decades. Studies conducted indicate that the 1990s saw a dramatic change in customer expectations concerning service quality and standards with a corresponding increase in the number of complaints from disgruntled customers. In response to this, many organisations have established customer care and complaints management services to respond to the need of customers. A substantial amount of literature exists on the subject of complaints management and its role in service quality, however, the focus has been on organisations in the private sector. The research undertaken in this paper aimed to investigate the role of complaints management systems (CMS) to evaluate service quality. The focus of this research was on local government with special attention on George Municipality. A literature review was done to establish the importance of service quality for local government as well as to investigate the link between an effective complaints management system and improvement in service quality. Furthermore, it was necessary to investigate the characteristics, design and implementation of an effective complaints management system. A questionnaire was developed in order to obtain primary data from a selected sample group. The data obtained from the questionnaire was statistically analysed and interpreted. The core findings from the analysed questionnaire indicated the following:  service quality is relevant in local government;  there is no clear method to measure service quality;  no formal and structured complaints management system exist, and  the implementation of an effective complaints management system will both improve service delivery and provide benefits to all involved. iv This study recommends that:  service quality standards and measurement be of strategic importance to local government;  customers should be consulted and involved when determining the service quality standards and measurement, and  an organised and structured complaints management system that seeks to address all complaints in order to improve the level of service quality to customers be developed. Finally, the success of the CMS will depend on management’s commitment to change on a continuous basis as well as the degree to which management proactively resolves customer complaint through the involvement of the customer.
  • Full Text:
  • Date Issued: 2008

Evaluation of the effective micro-organisms (EM) on soil chemical properties and yield of selected vegetables in the Eastern Cape, South Africa

  • Authors: Ncube, Lindani
  • Date: 2008
  • Subjects: Greenhouse management -- South Africa -- Eastern Cape , Butternut -- South Africa -- Eastern Cape , Microorganisms -- South Africa -- Eastern Cape , Sustainable agriculture -- South Africa -- Eastern Cape , Organic farming -- South Africa -- Eastern Cape , Tomatoes -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , MSc Agric (Horticultural Science)
  • Identifier: vital:11886 , http://hdl.handle.net/10353/86
  • Description: Effective microorganisms (EM), a commercial concoction of microbes that includes yeasts, fungi, bacteria and actinomycetes, have been found to be effective in enhancing crop growth by a number of scholars. It is registered in South Africa, but it had not been thoroughly investigated. The present study investigated the effects of EM on growth, yield and quality of tomato (Lycopersicon esculentum Mill), butternut (Curcurbita moschata) and Swiss chard (Beta vulgaris), along with selected soil properties. In field-grown tomato it was observed that the application of EM caused a significant increase in the number of fruits at seven weeks after transplanting. However, plants treated with EM alone, or EM in combination with other amendments, subsequently produced lower yields owing to an outbreak of early and late blights which affected them the most severely. Combined applications of EM with organic amendments improved plant N content and increased soil N content above initial levels. The application of compost resulted in soil N and P concentrations higher than those of the control presumably due to nutrients being slowly released from the compost material. In a follow up greenhouse trial EM application had a negative effect on tomato leaf dry matter yield, number of leaves, number of trusses, fruit yield and number of fruits. The negative effects of EM were ascribed to N immobilization by the EM that could have resulted in reduced N availability to plants. The lower number of fruits associated with EM application resulted in improved average fruit weight of tomatoes grown in the greenhouse, possibly as a result of more assimilates being partitioned to the few fruits EM application also had a negative effect on field grown butternut as reflected by lower total yield, lower marketable yield and lower first grade yield. The results were attributed to immobilization of N induced by application of EM, and to the inability of EM to control pumpkin fly that attacked very young fruit, resulting in their failure to develop or resulting in the down grading of mature fruits. The application of EM alone had a positive but non significant effect on the yields of both the first and second harvests of Swiss chard. However, when applied with compost or goat manure, a non significant negative effect on yield was observed. When applied with inorganic fertilizer, EM had no effect on yield but tended to increase the uptake of nitrogen by Swiss chard. Though goat manure had a narrower C: N ratio than compost, it did not result in greater EM effectiveness as had been hoped. However, goat manure had a more positive effect on soil properties than compost. It increased the N, P, and K contents of the soil and resulted in a narrower C: N ratio of the soil compared to compost. Generally, the results of the four trials conducted with three different crops indicated that EM had inconsistent effects on crop performance.
  • Full Text:
  • Date Issued: 2008

Evaluation of the pharmaceutical availability of erythromycin from topical formulations

  • Authors: Mandimika, Nyaradzo
  • Date: 2008
  • Subjects: Pharmacy -- Research Chromatographic analysis Gel permeation chromatography Gels (Pharmacy) Chemistry, analytic Acne -- Treatment Sebaceous glands -- Diseases -- Treatment Drugs -- Testing Erythromycin -- Bioavailability
  • Language: English
  • Type: Thesis , Masters , MPharm
  • Identifier: vital:3771 , http://hdl.handle.net/10962/d1003249
  • Description: Erythromycin (ERY) is a macrolide antibiotic which is used in the treatment of acne vulgaris.Acne is a common skin condition that occurs when the sebaceous glands and hair shafts become infected by the bacteria Propionibacterium acnes. Acne is a chronic condition that may last for years and the severity of the effects of the disease on patients is often undermined especially in third world countries where more emphasis is placed on other more life-threatening diseases. It may cause considerable physical and emotional distress to sufferers along with the possibility of permanent scarring. Although use of topical ERY formulations is not the first line of treatment it has proven to be effective in treating inflammation of skin and skin structures cause by the responsible bacteria. To-date there are a variety of vehicles which are used in preparing topical ERY formulations namely ointment and gel bases, alcoholic solutions and pledgets. All the gel formulations on the market contain hydroxypropyl cellulose, alcohol and water along with the active ingredient(s). However, some gel formulations contain propylene glycol in addition to these excipients an example being Emgel®. Propylene glycol has been shown to affect the penetration of topically applied drugs through the skin suggesting that it would be highly likely that those formulations which contain propylene glycol may release more ERY into the skin following application. With this in mind, two ERY gel formulations were produced which contained different percentages of propylene glycol. According to the FDA guidelines, pharmacokinetic measurements in blood, plasma and/or urine of topical dermatological drug products are not feasible to document bioequivalence since the active ingredient(s) in topical formulations is/are not intended to be absorbed into the systemic circulation and in addition, concentrations in extracutaneous biological tissues would generally not be measurable. This limits determination of bioavailability and assessment of bioequivalence of such products to pharmacodynamic measurements, clinical trials and dermatopharmacokinetic (DPK) measurements such as tape stripping (TS) and microdialysis (MD).TS is a sampling technique which involves sequential removal of layers of the stratum corneum using strips of adhesive tape. This technique has found increasing use in DPK studies for investigation of drug kinetics in the skin following the application of a topical formulation. The technique has also been used as a diagnostic tool in assessing the quality of the stratum corneum in diseased skin. In the current research study, the tape stripping technique was used to investigate the pharmaceutical/biological availability of topical gel formulations containing ERY. MD is another DPK sampling technique which has been used to determine the amount of a topically applied drug that penetrates through the stratum corneum to reach deeper tissues of the skin. The in vivo sampling technique involves the insertion of microdialysis probes beneath the skin surface in the dermal tissue and allows for real-time sampling of the analyte at its target site. Recently in vitro MD has also been successfully used to assess the pharmaceutical availability of a topical corticosteroid, mometesone furoate, from topical formulations. Based on this work, microdialysis was used to determine the pharmaceutical availability of ERY from gel formulations which were developed for use in this research. The results of the pharmaceutical availability of ERY from in vivo tape stripping studies and the in vitro microdialysis studies were compared to establish correlation between the data. Pharmaceutical equivalence and bioequivalence data obtained from the respective studies on the gel formulations were investigated by statistical analysis of the data generated from both the in vitro and in vivo experiments. In summary the objectives of this research were: 1. To develop and validate a high performance liquid chromatography method suitable to analyse ERY concentrations obtained from in vitro microdialysis studies and in vivo tape stripping studies. 2. To prepare two different ERY gel formulations with different percentage content of propylene glycol. 3. To determine the pharmaceutical availability of ERY from two different gel formulations using in vitro microdialysis. 4. To develop and validate a tape stripping technique which could be used to determine percutaneous penetration and bioequivalence of the gel formulations. 5. To compare in vitro microdialysis and in vivo tape stripping data and attempt to establish a correlation between the two different approaches.
  • Full Text:
  • Date Issued: 2008

Excavating the 'critique' : an investigation into disjunctions between the espoused and the practiced within a Fine Art studio practice curriculum

  • Authors: Belluigi, Dina Zoe
  • Date: 2008
  • Subjects: Art -- Study and teaching (Higher) Postmodernism and education Universities and colleges -- Philosophy Universities and colleges -- Curricula Education, Higher -- Political aspects Creative thinking -- Study and teaching Discourse analysis -- Methodology Critical pedagogy
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1531 , http://hdl.handle.net/10962/d1003413
  • Description: This report presents the findings of a case study excavating the event of the ‘Critique’ (crit), the formative assessment method within a Fine Art Studio Practice curriculum. Arguments informed by critical postmodernism, education theories and contemporary art criticism are utilised to construct a dialectic of higher education, contemporary art and fine art studio practice. An emphasis is placed on the importance of agency, expressed through intentionality and critical thinking, with a recognition of the relationship between ‘the self’ and ‘the other’. Using critical discourse analysis, the disjunctions between the espoused and practiced curriculum are explored. The researcher analyses how the assessment practices of the case studied are influenced by unexamined agentic factors, such as inter-departmental relations, lecturers’ assumptions and prior learning, and structural determinants, such as the medium-specific Bachelor of Fine Art degree structure and prevailing artistic traditions. The research findings indicate that these are underpinned by tensions between two orientations, the espoused curriculum’s discourse-interest informed by critical theory, and the theory-in-use. The latter is shown to have unexamined modernist leanings towards formalism and a master-apprentice relationship between lecturer and students, which encourages reproduction rather than critical, creative thinking. The dominant discourses in the case studied construct a negative dialectic of the artist-student that can be seen to deny student agency and authorial responsibility. Findings suggest that students experience this as alienating, to the extent that to preserve their sense of self, they adopted surface and strategic approaches to learning. An argument is made for lecturers’ critically reflexive engagement with their teaching practice, and thereby to model ethical relationships between ‘self’ and ‘other’ during ‘crits’. In addition, emphasis is placed on how assessment practices should be more aligned with the espoused curriculum, so that the importance of a reflexive relationship between form and content, process and product, intentionality and interpretation is acknowledged.
  • Full Text:
  • Date Issued: 2008

Experiences and coping resources of the suicide negotiation staff at the Van Staden's Bridge

  • Authors: Botha, Miranda
  • Date: 2008
  • Subjects: Adjustment (Psychology) , Negotiation , Suicide -- Prevention
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:9926 , http://hdl.handle.net/10948/656 , Adjustment (Psychology) , Negotiation , Suicide -- Prevention
  • Description: The Van Staden’s Bridge has claimed 67 lives since its construction on 11 November 1971. A team of police officials, trained as negotiators who deal with suicide and hostage negotiation, are involved with the task of convincing suicidal persons who turn to the bridge to take their own lives, not to resort to suicide. They are responsible for persuading at least three people per week to reconisider suicide at this notorious bridge. The goal of this study was to explore and describe the experiences and coping resources of the SAPS suicide negotiation staff at the Van Staden’s Bridge, Thornhill, Port Elizabeth. A mixed methods study combining both the quantitative and qualitative approaches was implemented. An exploratory-descriptive design was used, because the topic is still a relatively under-researched area in South Africa. Two data collection measures, that is, the Coping Resources Inventory (CRI) and semi-structured interviewing were employed. The researcher conducted a pilot study to enhance the trustworthiness of the study. Non-probability, purposive sampling was employed to obtain research participants from the research population (suicide negotiation team), consisting of 12 members. Eight members participated voluntary in the quantitative data collection and of these a total of five participated in the qualitative research interviews. Six themes emerged from the results of the in-depth, semi-structured interviews: (1) experiences of SAPS suicide negotiators, (2) aspects that hinder the negotiation process, (3) characteristics of a negotiator, (4) important aspects of the negotiation process, (5) coping mechanisms of SAPS negotiators and (6) recommendations for rendering support to SAPS negotiators. The results from the CRI suggested that the participants have average coping resources with the cognitive domain being the lowest and both the social and physical domains being the highest. The limitations and the value of the study were outlined and finally, recommendations for future research were made.
  • Full Text:
  • Date Issued: 2008

Exploring approaches to teaching reading skills in English at senior phase in secondary schools in Mbizana district in the Eastern Cape: a case study

  • Authors: Masilo, Appolonia Nteboheleng
  • Date: 2008
  • Subjects: Reading (Secondary) -- South Africa -- Eastern Cape Province
  • Language: English
  • Type: Thesis , Masters , M Ed
  • Identifier: vital:16161 , http://hdl.handle.net/10353/204 , Reading (Secondary) -- South Africa -- Eastern Cape Province
  • Description: During the process of this research, the main objective was to explore the approaches that the teachers use to teach reading in English First Additional Language (FAL) in senior phase at General Education and Training (GET). This was due to the observed weak performance of learners in reading, especially in GET phases. To achieve this, 20 participants tha t consisted of 4 English FAL teachers and 16 learners of grades 8 and 9 were selected. The research focused on teacher perceptions and implementation of language teaching approaches. Learners were involved in the research in order to see whether the used approaches give learners a balanced experience of intensive and extensive programmes. The study found that there were a number of factors that contributed to the learners’ weak performance in reading. These included, among others, lack of balance between intensive and extensive reading programmes, with intensive reading getting more attention than extensive reading; lack of reading material in schools, especially for further exposure, pleasure and amusement; little or no exposure of learners to wider reading; inadequate teacher pre-service and inservice reading programmes; teachers’ misconception of extensive reading; learners’ home environment that does not encourage reading; lack of parental support and community involvement. These all affected negatively the learners’ v development of reading skills. The study made some recommendations for the improvement of teacher education programmes and reading resources in schools and communities. schools.
  • Full Text:
  • Date Issued: 2008

Exploring attitudes towards banner advertising on the world wide web

  • Authors: Krige, Philip
  • Date: 2008
  • Subjects: Internet advertising -- Banner , Internet users -- Banner , Internet marketing
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8705 , http://hdl.handle.net/10948/997 , Internet advertising -- Banner , Internet users -- Banner , Internet marketing
  • Description: The purpose of the study was to assess the effectiveness of banner advertising on the World Wide Web, as well as to explore and analyse the attitudes and behaviours of internet users towards banner advertising. The research objective was to determine, why people do not click on banners and to find ways in which advertisers can make banner advertisements appeal to consumers more effectively. Outcomes of the research suggested which features advertisers should avoid when developing clickable banners. An extensive literature review was carried out in order to highlight important aspects of historic research. The analysis conducted on this topic indicated that a gap exists in the area of public attitudes towards clickable banner advertising and the reasons why people avoid clicking on banners. To address the above questions, peoples’ attitudes towards banner and other Internet advertising were investigated through focus group interviews and surveys. The findings suggest that the main reason for the ignorance surrounding clickable banners was the low involvement between the product or service being advertised and the viewer’s interests. Other reasons included the high annoyance level of banner advertising and the threat of viruses that some banners may pose. Conclusions of the research recommend narrow targeting and personalisation of banner advertisements, constant rotations and replacements of banners to avoid burnouts as well as trustful and original appeal and content. Other important findings included: • The majority of people are indifferent towards banners, • People with less than three years of Internet experience tend to click more than people with more than three years of Internet experience, • Females showed more “clickable behaviour” than males, • People are more likely to click on banners which present interesting information, are bright and animated or promote catchy phrases for the surfer, • People prefer to see banners located on the top of the page or on the right side of the page, • Pop-ups are the most noticeable and are possibly the route cause of what triggers people to become annoyed or dislike banner ads, Findings of this research have high social value. If advertisers would take into account the results of the current study, they would be able to create more effective banners, which could effectively be redirected to the appropriate target market. This will enable them to cut their costs. Furthermore, online users would enjoy a more polite and friendly online environment, where their interests will be taken into account, which would diminish the current gap between customers and advertisers.
  • Full Text:
  • Date Issued: 2008

Factors influencing interracial mixing amongst university students

  • Authors: Flusk, Lynette Michelle
  • Date: 2008
  • Subjects: Spatial behavior , Social distance , Students -- South Africa -- Attitudes , Prejudice (Psychology) , College integration -- South Africa , Colleges and universities -- South Africa -- Social conditions
  • Language: English
  • Type: Thesis , Masters , M Soc Sc (C Psy)
  • Identifier: vital:11849 , http://hdl.handle.net/10353/150 , Spatial behavior , Social distance , Students -- South Africa -- Attitudes , Prejudice (Psychology) , College integration -- South Africa , Colleges and universities -- South Africa -- Social conditions
  • Description: This study examines the reasons given for the lack of interracial contact among 188 (142 Black, 25 White and 19 Coloured) university students. The most pervasive factor influencing such contact for the whole group (79.1 percent) was language differences. The statements endorsed by most black participants were; differences in behaviour (62.9 percent), socio-economic status (56.0 percent) and culture (52.5 percent). The coloured participants endorsed statements concerning socio-economic status (61.1 percent), culture (42.1 percent) and dissociation (42.1 percent). The white participants endorsed statements regarding race issues (64.0 percent), differences in behaviour (60.0 percent) and cultural differences (44.0 percent). This study found that metastereotypes social distance and contact correlate with prejudice. Metastereotypes and social distance positively influence prejudice in that an increase in these factors is associated with heightened levels of prejudice. The amount of contact between groups has a negative relationship with prejudice, indicating that increased levels of contact are associated with a decrease in prejudice.
  • Full Text:
  • Date Issued: 2008

Faktore wat die oorlewing van volstruiskuikens (Struthio Camelus) verhoog

  • Authors: Janse Van Vuuren, Maryke
  • Date: 2008
  • Subjects: Ostrich farming -- South Africa , Ostriches -- Breeding -- South Africa
  • Language: Afrikaans
  • Type: Thesis , Masters , MTech
  • Identifier: vital:10588 , http://hdl.handle.net/10948/848 , Ostrich farming -- South Africa , Ostriches -- Breeding -- South Africa
  • Description: Hierdie verhandeling is ‘n samestelling van verskeie studies, elk opgeskryf in die formaat en styl soos vereis deur die Suid-Afrikaanse Vereeniging vir Diereproduksie (South African Society of Animal Science). Hoofstuk 1 is ‘n literatuurstudie bestaande uit ‘n algemene inleiding wat agtergrond oor die studie verskaf en sluit die probleemstelling in, naamlik die swak oorlewing van volstruiskuikens wat onder kunsmatige toestande grootgemaak word. Hoofstukke 2, 3, 4 en 5 bestaan uit die eerste vier studies, waartydens sekere bestuurs-aspekte, wat moontlik oorlewing van volstruiskuikens kan verbeter (nl: populasiedigtheid, tipe vloer-oppervlak, die aanwending van broeipare en die aanwending van peetouers), ondersoek is. Hoofstukke 6, 7, 8 & 9 handel oor studies wat gerig is om voeding meer aanloklik te maak vir volstruiskuikens teneinde voedselinname te stimuleer en sodoende produksie en oorlewing te verbeter (nl: verskaffing van groenvoer, geur van voer, kleur van voer en beligting van voer). Die laaste hoofstuk bestaan uit ‘n algemene gevolgtrekking en aanbevelings. Alhoewel daar gepoog is om herhaling in hoofstukke te beperk, was dit onmoontlik om herhaling van sekere gedeeltes van hoofstukke te voorkom.
  • Full Text:
  • Date Issued: 2008

First and second born twins: a comparative study utilizing the Graffiths mental development scales - extended revised

  • Authors: Davidson, Gabrielle
  • Date: 2008
  • Subjects: Griffiths Scales of Mental Development , Twins -- Intelligence testing -- South Africa , Preschool children -- Intelligence testing -- South Africa , Mental development -- Testing , Psychological tests for children
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:9921 , http://hdl.handle.net/10948/669 , Griffiths Scales of Mental Development , Twins -- Intelligence testing -- South Africa , Preschool children -- Intelligence testing -- South Africa , Mental development -- Testing , Psychological tests for children
  • Description: Despite the concept of twins and twinning being a highly explored area of research for many years, limited research has been conducted on the comparison of first and second born twin development. The nature of twins leads people to believe that twins will present with similar characteristics, however, this study explores the possibility that due to their ordinal position they could in fact present with differing characteristics and could differ developmentally. The early holistic development of a child influences the rest of their lives. Concerning twins, the development of individuality and self-knowledge is especially important. Theorists, such as Piaget (1950), propose that child development takes place in stages and that although the order in which children proceed through these stages is the same, the pace at which this takes place can vary. The necessity of monitoring the child’s journey through these stages highlights the value of child developmental assessment. This form of assessment needs to be holistic, needs to involve a multidisciplinary team of professionals and needs to utilize assessment measures that are valid, reliable, culture-fair and standardized. The Griffiths Mental Development Scales-Extended Revised (GMDS-ER) is one such measure. This study, focusing on twin development, aimed to contribute and provide valuable information to a larger research project that is currently under way aiming to increase the applicability of the Griffiths Mental Development Scales-Extended Revised (GMDS-ER) in the South African context. The primary aim of the study, however, was to explore and compare the performance of normal first born and second born twins, aged between 2 and 8 years 4 months old, on the GMDS-ER. The purpose of the study was to generate information on the relationship between first born twins’ general development and second born twins’ general development. An exploratory, descriptive quantitative design was used. Participants were selected through a combination of non-probability purposive, convenience and snowball sampling. Data was analysed using descriptive statistics and dependent sample t-tests were employed to compare the General Quotients (GQ’s) of the first and second born twins in the sample. Results showed that no significant differences were found between the first and second born twins’ general development. Information generated from this study contributed to 1) child development research; 2) twin developmental research within a South African context; and 3) a greater group of studies on the GMDS-ER, currently underway in the United Kingdom and South Africa, aiming to contribute to the international credibility of this measure
  • Full Text:
  • Date Issued: 2008

Franchising a full service restaurant concept : a case study

  • Authors: Thomson, Guy
  • Date: 2008
  • Subjects: Franchises (Retail trade) -- South Africa -- Eastern Cape , Franchises (Retail trade) -- Management
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8728 , http://hdl.handle.net/10948/874 , Franchises (Retail trade) -- South Africa -- Eastern Cape , Franchises (Retail trade) -- Management
  • Description: This treatise investigates the restaurant industry, entrepreneurship, franchising and restaurant franchising in order to develop a model that will enable a full service restaurant concept to be converted into a successful franchise system. Restaurants play a significant role in our lifestyle, and dining out is a favoured social activity. The industry plays an important role in the transfer of skills as many people start working in the restaurant industry before moving onto more formal careers. The restaurant industry offers many opportunities for entrepreneurial activity as a result of the relatively low barriers to entry. Entrepreneurship is the pursuit of opportunity regardless of the resources at hand and it requires a willingness to take calculated risks in order to build something of value from virtually nothing. The success of emerging economies such as China and India has proven that the only growth sectors in these economies are small and medium enterprises, which are driven by entrepreneurs. Franchising is considered to be a viable growth strategy for small business as it provides a means of raising capital and a method of expanding the business in a relatively low risk manner. There are many well established restaurant franchise brands that originated in South Africa, starting out as successful single outlets and then by means of the business format franchise model, developed into multi unit franchise systems. There are certain basic generic steps that must be followed when developing a franchise system. This was verified by the empirical study of this treatise which was conducted as a single unit case study on the Dulce Franchise Group. Finally, as a result of the analysis of the literature study and the findings of the case study, a restaurant franchise conversion model was developed.
  • Full Text:
  • Date Issued: 2008

Gender and development: a study of the impact of selected cooperatives in the Eastern Cape Province

  • Authors: Sithole, Noluthando Victoria
  • Date: 2008
  • Subjects: Cooperative societies -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Women in development -- South Africa -- Eastern Cape , Women in cooperative societies -- South Africa -- Eastern Cape , Poverty -- South Africa -- Easttern Cape , Gender identity -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Masters , M SW
  • Identifier: vital:11752 , http://hdl.handle.net/10353/194 , Cooperative societies -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape , Women in development -- South Africa -- Eastern Cape , Women in cooperative societies -- South Africa -- Eastern Cape , Poverty -- South Africa -- Easttern Cape , Gender identity -- South Africa -- Eastern Cape
  • Description: In 1994 South Africa took a new direction towards democratic governance. This led to a change of government principles and approaches in leading the country. The people became the centre of the country’s development, resulting in the adoption of people-centred development and people-driven strategies. A special focus highlighted women as in the category which had endured poverty the most in South Africa. The South African government, through its various departments, has a responsibility to improve the lives of South Africans, and the Eastern Cape Provincial Department of Social Development is one of the departments which has committed itself towards changing the lives of women in the community. As a strategy to implement community development, the Provincial Department of Social Development is funding women cooperative programmes. Women cooperatives are a relatively new endeavour to address poverty within the democratic South Africa. The study supports the notion and attempts to show the impact that women have on community development. The researcher began studying the trends and realized that the funds allocated and the funding process of community development programmes by Provincial Department of Social Development is not working towards empowering communities. A purposive sampling method was used to select two women cooperative programmes in the Chris Hani District Municipality to explore the role of women in community development in the current context of democracy and social welfare transformation in South Africa; to explore the impact of gender through women cooperatives on community development and to explore strategies for the empowerment of women through community development intervention. The design of the study is qualitative, exploratory and descriptive in nature. The study also adapted evaluation and gender analysis methods to verify the effectiveness of women programmes. The study recommends that women be empowered with skills, knowledge, resources and opportunities to enable them to be more effective in community development.
  • Full Text:
  • Date Issued: 2008

Geographic variation in the susceptibility of false colding Moth, Thaumatotibia Leucotreta, populations to a granulovirus (CrleGV-SA)

  • Authors: Opoku-Debrah, John Kwadwo
  • Date: 2008
  • Subjects: Cryptophlebia leucotreta , Cryptophlebia leucotreta -- Control , Pests -- Biological control , Citrus -- Diseases and pests
  • Language: English
  • Type: Thesis , Masters , MTech
  • Identifier: vital:10586 , http://hdl.handle.net/10948/984 , Cryptophlebia leucotreta , Cryptophlebia leucotreta -- Control , Pests -- Biological control , Citrus -- Diseases and pests
  • Description: The false codling moth (FCM), Thaumatotibia (=Cryptophlebia) leucotreta (Meyrick) (Lepidoptera: Tortricidae) is a serious pest of citrus and other crops in Sub-Saharan Africa. The introduction of the Cryptophlebia leucotreta granulovirus (CrleGV-SA) Cryptogran and Cryptex (biopesticides) has proven to be very effective in the control of FCM. However, markedly lower susceptibility of some codling moth (CM), Cydia pomonella (L.) populations to Cydia pomonella granulovirus (CpGV-M), another granulovirus product used in the control of CM’s in Europe have been reported. Genetic differences between FCM populations in South Africa have also been established. It is therefore possible that differences in the susceptibility of these geographically distinct FCM populations to CrleGV-SA might also exist. To investigate this phenomenon, a benchmark for pathogenecity was established. In continuation of previous work with Cryptogran against the 1st and 5th instar FCM larvae, dose-response relationships were established for all five larval instars of FCM. In surface dose-response bioassays, the LC50 values for the 2nd, 3rd and 4th instars were calculated to be 4.516 x 104, 1.662 x 105 and 2.205 x 106 occlusion bodies (OBs)/ml, respectively. The LC90 values for the 2nd, 3rd and 4th instars were calculated to be 4.287 x 106, 9.992 x 106 and 1.661 x 108 OBs/ml, respectively. Susceptibility to CrleGV-SA was found to decline with larval stage and increase with time of exposure. The protocol was used in guiding bioassays with field collected FCM larvae. Laboratory assays conducted with Cryptogran (at 1.661 x 108 OBs/ml) against field collected FCM larvae from Addo, Kirkwood, Citrusdal and Clanwilliam as well as a standard laboratory colony, showed a significant difference in pathogenecity in only one case. This significant difference was observed between 5th instars from the Addo colony and 5th instars from the other populations. Four geographically distinct FCM colonies from Addo, Citrusdal, Marble Hall and Nelspruit were also established. Since Cryptogran and Cryptex are always targeted against 1st instar FCM larvae in the field, further comparative laboratory assays were conducted with the Addo colony and an old laboratory colony. Cryptogran was significantly more pathogenic than Cryptex against both the Addo and the old colony. However, a high level of heterogeneity was observed in responses within each population.
  • Full Text:
  • Date Issued: 2008

Growth of the South African abalone (Haliotis Midae) on three diets, under commercial conditions

  • Authors: Makhande, Emmanuel Denis
  • Date: 2008
  • Subjects: Haliotis midae -- South Africa , Abalone culture -- South Africa , Abalones -- Nutrition -- South Africa , Abalones -- Physiology -- South Africa
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:10706 , http://hdl.handle.net/10948/755 , Haliotis midae -- South Africa , Abalone culture -- South Africa , Abalones -- Nutrition -- South Africa , Abalones -- Physiology -- South Africa
  • Description: Haliotis midae is the cornerstone of the South African abalone fishery. For more than a decade, the wild abalone stock of South Africa has suffered decline due to over-exploitation and illegal activities such as poaching. Prior to 1970, no regulations were in place concerning the annual landings. As a result the fishery was exploited as if it were an infinite resource. It is this initial uncontrolled harvesting (regardless of age) and poaching that has driven the abalone resource decline. Due to the slow growth rate exhibited by abalone as a species, natural replenishment of wild stock following exploitation and poaching was far below the rate of exploitation of this resource. Studies on the growth of abalone have mainly been conducted under laboratory conditions. The purpose of this study was to measure the growth of abalone, fed different diets, under commercial culture conditions. Three food types were used namely; commercial pellets, seaweed (Ulva spp.) and dried kelp bars (Ecklonia maxima). Four diets were obtained from the three food types namely; combination of commercial pellets and seaweed (Diet A), commercial pellets only (Diet B), seaweed only (Diet C) and dried kelp bars only (Diet D). The food types used in this study represent both artificial (Commercial pellets) and natural feeds (seaweed and kelp) used in commercial abalone culture. The growth of two cohorts (40-50 mm and 50-60 mm) was followed over a 426 day period, with data for the first 183 days being used for statistical analysis to determine performance of a given diet. The best growth rates were found in abalone fed Diet A (40-50 mm: 2.64 mm.month-1; 50-60 mm 2.78: mm.month-1) and B (40-50 mm: 2.20 mm.month-1; 50-60 mm: 2.35: mm.month-1). These (Diets A and B) gave higher growth rates when compared to Diets C and D (natural diets), whose growth rates ranged between 0.50 mm.month-1 and 1.71 mm.month-1 for both cohorts. Also observed in this study was that, the mixture of formulated diet and seaweed gave better growth than formulated diet given exclusively.
  • Full Text:
  • Date Issued: 2008

Have the continuous improvement (CI) efforts at Absa Bank's Horizon Medium Business Banking Unit, in the Gauteng West Region successfully addressed the key concepts of continuous improvement as set out by Trollip, 2008?

  • Authors: Ndlovu, Sinqobile Khobotho
  • Date: 2008
  • Subjects: Banks and banking -- Customer services -- South Africa , Organizational effectiveness
  • Language: English
  • Type: Thesis , Masters , MBA
  • Identifier: vital:8721 , http://hdl.handle.net/10948/904 , Banks and banking -- Customer services -- South Africa , Organizational effectiveness
  • Description: Success in today’s highly competitive financial sector requires an organization to have a sustainable competitive advantage that would distinguish it from the rest. Products offered by financial organizations are naturally the same and the quality of service plays a critical role in terms of creating the much needed competitive advantage. This calls for the implementation of quality initiatives like Continuous improvement (CI). This paper investigates the extent to which CI efforts at the Horizon business unit of Absa corporate and business banking have successfully addressed the key concepts of CI set out by Trollip (2008). A literature survey was undertaken into the elements and benefits of CI. Questionnaires were sent to all employees of the business unit for their views on CI and the impact, they believe it has on the unit’s endeavors to deliver faster, defect free, innovative products/services, whilst achieving tougher goals. In conclusion the research paper led to recommendations to improve the CI efforts at the Horizon business unit. The research also confirmed the importance of the commitment of all employees is essential for the success of CI efforts in improving the quality of service offered by an organization.
  • Full Text:
  • Date Issued: 2008

Her master's: the experiences of mature women in postgraduate study

  • Authors: Hood, Mary Ann
  • Date: 2008
  • Subjects: Women graduate students -- South Africa , Women scholars -- South Africa , Women -- Education (Graduate)
  • Language: English
  • Type: Thesis , Masters , M Ed
  • Identifier: vital:16159 , http://hdl.handle.net/10353/211 , Women graduate students -- South Africa , Women scholars -- South Africa , Women -- Education (Graduate)
  • Description: This study explored the experiences of mature women undertaking Master’s degrees at a Historically Disadvantaged Institution of Higher Learning in South Africa. Attaining a Master’s degree is a significant milestone in education and the process may take from one to three, or more, years. The study aims to describe aspects of the women’s experiences of their research journeys and the goal of the study is to present descriptions of these experiences. The methodology is qualitative and uses a critical feminist approach, appropriate to exploring the research questions. A critical feminist stance holds that women experience the world differently to men given the patriarchal structure of society. Emphasis is placed on the primacy of the co-researcher’s perceptions of their experiences. A single method research design was followed using semi-structured interviews. The analysis resulted in the emergence of a number of central themes. Together these reflect the experiences of the co-researchers, although they did not automatically share all the experiences. The findings show that postgraduate study, in the form of a Master’s degree, was found to be transformative, meaningful and worthwhile, although not without difficulties; mainly the demands required of multiple roles within home, community, work, and the university. This study contributes towards the larger body of research within education, in particular in the understanding the experiences of mature women within the field of postgraduate study.
  • Full Text:
  • Date Issued: 2008
  • Disclaimer
  • Privacy
  • Copyright
  • Contact