Policies, procedures and practices contributing to tensions between labour and management
- Authors: Basson, Jerome Godfrey
- Date: 2010
- Subjects: Labor laws and legislation -- South Africa , Human capital -- South Africa , South Africa -- Politics and government , South Africa -- Constitution
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9427 , http://hdl.handle.net/10948/1267 , Labor laws and legislation -- South Africa , Human capital -- South Africa , South Africa -- Politics and government , South Africa -- Constitution
- Description: The Constitution of the Republic of South Africa guarantees the right of education to all citizens of the country. The Eastern Cape Department of Education went a step further by adopting a vision to ensure quality public education that will result in the positive transformation of all schools. Education is therefore a very important part of the life of any society and needs to be protected at all costs. It is therefore important that all obstacles in the way of providing quality public education be removed. It is no secret that the Eastern Cape Department of Education has had a number of battles with some of its social partners. These battles have negatively impacted on the education system. This Department also received the largest slice of the taxpayers’ money. It is time to take serious steps to halt the waste of time and resources. It is against this background that this study wanted to consider policies, procedures and practices that generated tension between the management and labour in the Eastern Cape Department of Education. It is my belief that if tension between the different social partners can be reduced, we would have gone a long way in achieving the vision of the Department of Education. The research methodology that was followed for this study comprised the following: • Literature was reviewed that dealt with labour relations and human resources. • A questionnaire was designed to collect information from the different participants. • The information in the questionnaire was incorporated into the main study where findings were identified and recommendations were formulated.
- Full Text:
- Date Issued: 2010
- Authors: Basson, Jerome Godfrey
- Date: 2010
- Subjects: Labor laws and legislation -- South Africa , Human capital -- South Africa , South Africa -- Politics and government , South Africa -- Constitution
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9427 , http://hdl.handle.net/10948/1267 , Labor laws and legislation -- South Africa , Human capital -- South Africa , South Africa -- Politics and government , South Africa -- Constitution
- Description: The Constitution of the Republic of South Africa guarantees the right of education to all citizens of the country. The Eastern Cape Department of Education went a step further by adopting a vision to ensure quality public education that will result in the positive transformation of all schools. Education is therefore a very important part of the life of any society and needs to be protected at all costs. It is therefore important that all obstacles in the way of providing quality public education be removed. It is no secret that the Eastern Cape Department of Education has had a number of battles with some of its social partners. These battles have negatively impacted on the education system. This Department also received the largest slice of the taxpayers’ money. It is time to take serious steps to halt the waste of time and resources. It is against this background that this study wanted to consider policies, procedures and practices that generated tension between the management and labour in the Eastern Cape Department of Education. It is my belief that if tension between the different social partners can be reduced, we would have gone a long way in achieving the vision of the Department of Education. The research methodology that was followed for this study comprised the following: • Literature was reviewed that dealt with labour relations and human resources. • A questionnaire was designed to collect information from the different participants. • The information in the questionnaire was incorporated into the main study where findings were identified and recommendations were formulated.
- Full Text:
- Date Issued: 2010
An ion imprinted polymer for the selective extraction of mercury (II) ions in aqueous media
- Authors: Batlokwa, Bareki Shima
- Date: 2010 , 2013-07-18
- Subjects: Mercury , Metal ions , Imprinted polymers , Polymerization
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4294 , http://hdl.handle.net/10962/d1004541 , Mercury , Metal ions , Imprinted polymers , Polymerization
- Description: This thesis presents the application of an imprinted mercury(lI) polymer that we synthesized by copolymerizing the functional and cross-linking monomers, N'-[3-(Trimethoxysilyl)propyl] diethylenetriamine (TPET) and tetraethylorthosilicate (TEOS) in the presence of mercury (II) ions as template. A bulk polymerization method following a double-imprinting procedure and employing hexadecyltrimethylammonium bromide (CTAB), as a second template to improve the efficiency of the polymer was employed in the synthesis. The imprinted polymer particles were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and their average size determined by screen analysis using standard test sieves. The relative selective coefficients (k') of the imprinted polymer evaluated from selective binding studies between Hg ²⁺and Cu²⁺ or Hg²⁺ and Cd²⁺, were 10588 and 3147, respectively. These values indicated highly favored Hg²⁺ extractions over the two competing ions. Application of the polymer to various real water samples (tap, sea, river, pulverized coal solution, treated and untreated sewerage from the vicinity of Grahamstown in South Africa) showed high extraction efficiencies (EEs) of Hg²⁺ ions; (over 84% in all cases) as evaluated from the detected unextracted Hg²⁺ ions by inductively coupled plasma optical emission spectroscopy (ICP-OES). The limit of detection (LOD, 3ơ) of the method was evaluated to be 0.036 ng ml⁻¹ and generally the data (n=10) had percentage relative standard deviation (%RSD) of less than 4%. These findings indicate that the double-imprinted polymer has potential to be used as an efficient extraction material for the selective pre-concentration of mercury(lI) ions in aqueous environments. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2010
- Authors: Batlokwa, Bareki Shima
- Date: 2010 , 2013-07-18
- Subjects: Mercury , Metal ions , Imprinted polymers , Polymerization
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4294 , http://hdl.handle.net/10962/d1004541 , Mercury , Metal ions , Imprinted polymers , Polymerization
- Description: This thesis presents the application of an imprinted mercury(lI) polymer that we synthesized by copolymerizing the functional and cross-linking monomers, N'-[3-(Trimethoxysilyl)propyl] diethylenetriamine (TPET) and tetraethylorthosilicate (TEOS) in the presence of mercury (II) ions as template. A bulk polymerization method following a double-imprinting procedure and employing hexadecyltrimethylammonium bromide (CTAB), as a second template to improve the efficiency of the polymer was employed in the synthesis. The imprinted polymer particles were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and their average size determined by screen analysis using standard test sieves. The relative selective coefficients (k') of the imprinted polymer evaluated from selective binding studies between Hg ²⁺and Cu²⁺ or Hg²⁺ and Cd²⁺, were 10588 and 3147, respectively. These values indicated highly favored Hg²⁺ extractions over the two competing ions. Application of the polymer to various real water samples (tap, sea, river, pulverized coal solution, treated and untreated sewerage from the vicinity of Grahamstown in South Africa) showed high extraction efficiencies (EEs) of Hg²⁺ ions; (over 84% in all cases) as evaluated from the detected unextracted Hg²⁺ ions by inductively coupled plasma optical emission spectroscopy (ICP-OES). The limit of detection (LOD, 3ơ) of the method was evaluated to be 0.036 ng ml⁻¹ and generally the data (n=10) had percentage relative standard deviation (%RSD) of less than 4%. These findings indicate that the double-imprinted polymer has potential to be used as an efficient extraction material for the selective pre-concentration of mercury(lI) ions in aqueous environments. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
- Full Text:
- Date Issued: 2010
Sandy beach food webs and trophic linkages with estuaries: a stable light isotope approach
- Authors: Bezuidenhout, Karien
- Date: 2010
- Subjects: Stable isotopes in ecological research -- South Africa -- Eastern Cape , Food chains (Ecology) -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10694 , http://hdl.handle.net/10948/1269 , Stable isotopes in ecological research -- South Africa -- Eastern Cape , Food chains (Ecology) -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape
- Description: Two pocket sandy beaches, Eastern Cape, South Africa, were investigated, to determine whether these beaches were subsidised by an adjacent mangrove estuary, by using stable light isotope (δ 13C and δ 15N) analyses. The trophodynamics and macrofaunal food webs of these two beaches, situated between the Mgazi and Mgazana estuaries (in a warm-temperate/subtropical transition zone,), were described. Two to 2.5 trophic levels were identified for the macrobenthic community, with suspension feeders and omnivorous scavengers as the primary consumers, and carnivores as the secondary consumers. Mangrove material and terrigenous inputs were not driving the sandy beach food webs. Instead, marine allochthonous inputs (carrion, macroalgae), possibly phytoplankton, sediment organic matter, and resident macroinfauna were the dominant food sources. Cattle dung could have been the only important terrigenous food source utilised by the beach benthos. The macroinfauna displayed generalist/omnivorous feeding strategies, but within the limits of predominantly marine food sources. There was evidence that carnivores actively preyed on resident beach fauna. Omnivory and intraguild feeding might also be important biological processes in these communities. Seasonal and spatial variability in stable isotope composition of the fauna was observed, but few patterns were evident. There was a general trend of more enriched δ 15N and δ 13C composition of animal tissues in summer as opposed to winter. This was accompanied by a general decrease in C:N ratios in summer. It was hypothesised that these isotopic and biochemical changes were in response to increased food availability during summer. Although mangrove material appeared not to play an important role in the nutrition of these sandy beach communities, it was suggested that a high retention time of particles in the bay could enhance bacterial decay of particulate mangrove material, which could then act as fine, bacterial-enriched particulate food to the macrobenthos. This remains to be tested.
- Full Text:
- Date Issued: 2010
- Authors: Bezuidenhout, Karien
- Date: 2010
- Subjects: Stable isotopes in ecological research -- South Africa -- Eastern Cape , Food chains (Ecology) -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10694 , http://hdl.handle.net/10948/1269 , Stable isotopes in ecological research -- South Africa -- Eastern Cape , Food chains (Ecology) -- South Africa -- Eastern Cape , Estuaries -- South Africa -- Eastern Cape
- Description: Two pocket sandy beaches, Eastern Cape, South Africa, were investigated, to determine whether these beaches were subsidised by an adjacent mangrove estuary, by using stable light isotope (δ 13C and δ 15N) analyses. The trophodynamics and macrofaunal food webs of these two beaches, situated between the Mgazi and Mgazana estuaries (in a warm-temperate/subtropical transition zone,), were described. Two to 2.5 trophic levels were identified for the macrobenthic community, with suspension feeders and omnivorous scavengers as the primary consumers, and carnivores as the secondary consumers. Mangrove material and terrigenous inputs were not driving the sandy beach food webs. Instead, marine allochthonous inputs (carrion, macroalgae), possibly phytoplankton, sediment organic matter, and resident macroinfauna were the dominant food sources. Cattle dung could have been the only important terrigenous food source utilised by the beach benthos. The macroinfauna displayed generalist/omnivorous feeding strategies, but within the limits of predominantly marine food sources. There was evidence that carnivores actively preyed on resident beach fauna. Omnivory and intraguild feeding might also be important biological processes in these communities. Seasonal and spatial variability in stable isotope composition of the fauna was observed, but few patterns were evident. There was a general trend of more enriched δ 15N and δ 13C composition of animal tissues in summer as opposed to winter. This was accompanied by a general decrease in C:N ratios in summer. It was hypothesised that these isotopic and biochemical changes were in response to increased food availability during summer. Although mangrove material appeared not to play an important role in the nutrition of these sandy beach communities, it was suggested that a high retention time of particles in the bay could enhance bacterial decay of particulate mangrove material, which could then act as fine, bacterial-enriched particulate food to the macrobenthos. This remains to be tested.
- Full Text:
- Date Issued: 2010
Psychologists' perceived influences of early strategies on the psychosocial response to those affected by disasters
- Authors: Blackburn, Nerina June
- Date: 2010
- Subjects: Disasters -- Psychological aspects , Post-traumatic stress disorder , Disaster victims -- Mental health , Disasters
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9872 , http://hdl.handle.net/10948/1416 , Disasters -- Psychological aspects , Post-traumatic stress disorder , Disaster victims -- Mental health , Disasters
- Description: Currently some confusion exists as to how health professionals should best respond to the psychological needs of those affected by disasters. Some have argued that early psychological intervention is essential and others have argued that early formal psychological interventions have no useful role in post trauma response. This study highlights the importance of considering both counselling and non-counselling factors as potentially influencing the psychosocial response of disaster victims. Although posttraumatic stress disorder (PTSD) is not the only mental disorder that can develop as a result of exposure to disasters, it is probably the most frequent and debilitating psychological disorder associated with traumatic stress. In this exploratorydescriptive study the researcher aimed to explore and describe psychologists’ perceived influences of early strategies on the psychosocial response to those affected by disaster. The researcher used non-probability snowball sampling to access participants. The sample consisted of 5 participants. Semi structured interviews were conducted. Content analysis was used to analyse the data obtained from interviews. Results that emerged from the data suggest that there are many factors that influence the psychosocial response to those affected by disasters. These factors include the screening process, needs of survivors, the method of choice for treatment, the timing of intervention, pharmacology, the South African context, training and planning. The study makes a contribution to the growing knowledge of early strategies in response to those affected by disasters.
- Full Text:
- Date Issued: 2010
- Authors: Blackburn, Nerina June
- Date: 2010
- Subjects: Disasters -- Psychological aspects , Post-traumatic stress disorder , Disaster victims -- Mental health , Disasters
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9872 , http://hdl.handle.net/10948/1416 , Disasters -- Psychological aspects , Post-traumatic stress disorder , Disaster victims -- Mental health , Disasters
- Description: Currently some confusion exists as to how health professionals should best respond to the psychological needs of those affected by disasters. Some have argued that early psychological intervention is essential and others have argued that early formal psychological interventions have no useful role in post trauma response. This study highlights the importance of considering both counselling and non-counselling factors as potentially influencing the psychosocial response of disaster victims. Although posttraumatic stress disorder (PTSD) is not the only mental disorder that can develop as a result of exposure to disasters, it is probably the most frequent and debilitating psychological disorder associated with traumatic stress. In this exploratorydescriptive study the researcher aimed to explore and describe psychologists’ perceived influences of early strategies on the psychosocial response to those affected by disaster. The researcher used non-probability snowball sampling to access participants. The sample consisted of 5 participants. Semi structured interviews were conducted. Content analysis was used to analyse the data obtained from interviews. Results that emerged from the data suggest that there are many factors that influence the psychosocial response to those affected by disasters. These factors include the screening process, needs of survivors, the method of choice for treatment, the timing of intervention, pharmacology, the South African context, training and planning. The study makes a contribution to the growing knowledge of early strategies in response to those affected by disasters.
- Full Text:
- Date Issued: 2010
The ichthyofauna and piscivorous avifauna in a small temporarily open/closed Eastern Cape estuary, South Africa
- Authors: Blake, Justin David
- Date: 2010
- Subjects: Estuarine fishes -- South Africa -- Eastern Cape , Bird populations -- South Africa -- Riet River Estuary , Estuaries -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Riet River Estuary , Estuarine animals -- South Africa -- Riet River Estuary , Birds -- South Africa -- Riet River Estuary , Riet River Estuary (South Africa)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5709 , http://hdl.handle.net/10962/d1005395 , Estuarine fishes -- South Africa -- Eastern Cape , Bird populations -- South Africa -- Riet River Estuary , Estuaries -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Riet River Estuary , Estuarine animals -- South Africa -- Riet River Estuary , Birds -- South Africa -- Riet River Estuary , Riet River Estuary (South Africa)
- Description: The spatial and temporal patterns in selected components of the ichthyofauna and piscivorous avifauna in the small temporarily open/closed Riet River Estuary located on the eastern seaboard of southern Africa was investigated monthly over the period August 2005 to July 2006. The ichthyofauna within the littoral zone of the estuary was sampled using a 5 m seine net (8 stations) while a 30 m seine net (4 stations) was employed to sample the fish in the channel. Bird counts were made along repeat transects along the length of the estuary. Total ichthyofaunal abundances and biomass ranged between 1.60 and 8.67 individuals m⁻² and 0.45 to 21.76 g wwt m⁻² within the littoral zone, and between 0.08 and 0.44 individuals m⁻² and 0.58 and 36.52 g wwt m⁻² in the channel of the estuary. The highest values were generally recorded during the summer months. Results of the numerical analysis indicated that the breaching events recorded over the study period did not lead to a common trend in the ichthyofaunal community. In the absence of a link to the marine environment, the ichthyofaunal community in the littoral zone was numerically dominated by the estuarine resident species, Gilchristella aestuaria and to a lesser extent by Glossogobius callidus, which collectively accounted for ca. 54% of the total ichthyofauna sampled. The establishment of a link to the marine environment coincided with increased numbers of marine breeding species including Atherina breviceps and Rhabdosargus holubi to total fish counts within the estuary. Hierarchical cluster analysis did not identify any spatial patterns in the community structure of the ichthyofauna in the littoral zone or channel zone of the estuary, which could likely be linked to the absence of any distinct horizontal patterns in salinity and temperature within the system. A total of thirteen piscivorous bird species was recorded over the study period. Of the recorded species, six species were wading piscivores, four species were aerial divers and the remaining three species were pursuit swimmers. There were no significant correlations between the estimates of the ichthyofaunal abundance and biomass and bird numbers evident during the study (P> 0.05 in both cases). The Reed Cormorant (Phalacrocorax africanus) was the dominant species throughout the study, with a mean of 8.25 (SD ± 7.90) individuals per count. Mean values of the Pied Kingfisher (Ceryle rudis) and Giant Kingfisher (Megaceryle maximus) were 3.42 (SD ± 1.20) and 1.17 (SD ± 0.60) individuals per count, respectively. The remaining species revealed mean values < 0.5 individuals per count. The highest bird numbers were recorded in winter reflecting the migration of large numbers of the Reed Cormorant into the system. Breaching events were associated with a decrease in total bird numbers, which was most likely due to loss of potential foraging habitat (littoral zone) for waders resulting from reduced water levels. Monthly food consumption by all piscivorous birds revealed large temporal variability, ranging from 26.35 to 140.58 kg per month. The observed variability could be linked to mouth phase and bird numbers.
- Full Text:
- Date Issued: 2010
- Authors: Blake, Justin David
- Date: 2010
- Subjects: Estuarine fishes -- South Africa -- Eastern Cape , Bird populations -- South Africa -- Riet River Estuary , Estuaries -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Riet River Estuary , Estuarine animals -- South Africa -- Riet River Estuary , Birds -- South Africa -- Riet River Estuary , Riet River Estuary (South Africa)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5709 , http://hdl.handle.net/10962/d1005395 , Estuarine fishes -- South Africa -- Eastern Cape , Bird populations -- South Africa -- Riet River Estuary , Estuaries -- South Africa -- Eastern Cape , Fish populations -- South Africa -- Riet River Estuary , Estuarine animals -- South Africa -- Riet River Estuary , Birds -- South Africa -- Riet River Estuary , Riet River Estuary (South Africa)
- Description: The spatial and temporal patterns in selected components of the ichthyofauna and piscivorous avifauna in the small temporarily open/closed Riet River Estuary located on the eastern seaboard of southern Africa was investigated monthly over the period August 2005 to July 2006. The ichthyofauna within the littoral zone of the estuary was sampled using a 5 m seine net (8 stations) while a 30 m seine net (4 stations) was employed to sample the fish in the channel. Bird counts were made along repeat transects along the length of the estuary. Total ichthyofaunal abundances and biomass ranged between 1.60 and 8.67 individuals m⁻² and 0.45 to 21.76 g wwt m⁻² within the littoral zone, and between 0.08 and 0.44 individuals m⁻² and 0.58 and 36.52 g wwt m⁻² in the channel of the estuary. The highest values were generally recorded during the summer months. Results of the numerical analysis indicated that the breaching events recorded over the study period did not lead to a common trend in the ichthyofaunal community. In the absence of a link to the marine environment, the ichthyofaunal community in the littoral zone was numerically dominated by the estuarine resident species, Gilchristella aestuaria and to a lesser extent by Glossogobius callidus, which collectively accounted for ca. 54% of the total ichthyofauna sampled. The establishment of a link to the marine environment coincided with increased numbers of marine breeding species including Atherina breviceps and Rhabdosargus holubi to total fish counts within the estuary. Hierarchical cluster analysis did not identify any spatial patterns in the community structure of the ichthyofauna in the littoral zone or channel zone of the estuary, which could likely be linked to the absence of any distinct horizontal patterns in salinity and temperature within the system. A total of thirteen piscivorous bird species was recorded over the study period. Of the recorded species, six species were wading piscivores, four species were aerial divers and the remaining three species were pursuit swimmers. There were no significant correlations between the estimates of the ichthyofaunal abundance and biomass and bird numbers evident during the study (P> 0.05 in both cases). The Reed Cormorant (Phalacrocorax africanus) was the dominant species throughout the study, with a mean of 8.25 (SD ± 7.90) individuals per count. Mean values of the Pied Kingfisher (Ceryle rudis) and Giant Kingfisher (Megaceryle maximus) were 3.42 (SD ± 1.20) and 1.17 (SD ± 0.60) individuals per count, respectively. The remaining species revealed mean values < 0.5 individuals per count. The highest bird numbers were recorded in winter reflecting the migration of large numbers of the Reed Cormorant into the system. Breaching events were associated with a decrease in total bird numbers, which was most likely due to loss of potential foraging habitat (littoral zone) for waders resulting from reduced water levels. Monthly food consumption by all piscivorous birds revealed large temporal variability, ranging from 26.35 to 140.58 kg per month. The observed variability could be linked to mouth phase and bird numbers.
- Full Text:
- Date Issued: 2010
Collaborative monitoring in ecosystem management in South Africa's communal lands
- Authors: Bolus, Cosman
- Date: 2010
- Subjects: Conservation of natural resources -- South Africa , Natural resources -- South Africa -- Management , Community development -- South Africa -- Citizen participation , Conservation of natural resources -- Social aspects -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4743 , http://hdl.handle.net/10962/d1006948 , Conservation of natural resources -- South Africa , Natural resources -- South Africa -- Management , Community development -- South Africa -- Citizen participation , Conservation of natural resources -- Social aspects -- South Africa
- Description: Internationally there is an increasing focus on involving local communities in natural resource management and monitoring. Monitoring methods which are professionally driven appear to be inadequate to deal with the monitoring of natural resource use and biodiversity conservation, globally. This is especially evident in areas such as South African rural communal land. Two community based natural resource management (CBNRM) programmes in areas which are communally governed in the Eastern Cape, South Africa, namely Nqabara and Machubeni, were used as part of this research study. This thesis identified and tested potentially simple and cost effective monitoring methods related to the utilization of the local rangelands and indigenous forests. The criteria that were tested include 1) appropriateness and effectiveness in measuring change, and 2) contribution to building adaptive capacity among local land managers through learning. The criteria were assessed using a scoring system for each monitoring method in order to evaluate their strengths and weaknesses . This was done by using both quantitative and qualitative data. Contribution to building adaptive capacity was assessed by evaluating technical capacity gained, local ecological knowledge contributed and learning by participants. This was done using qualitative data. The results show that the monitoring methods had different strengths and weaknesses in relation to the criteria, making them more appropriate for different priorities such as effectively measuring change or building adaptive capacity. It is argued that an adaptive approach is a useful component in the participatory monitoring process. An adaptive framework was developed from lessons learnt in this study for collaborative monitoring. Challenges such as low literacy levels and adequate training still need to be addressed to strengthen efforts towards participatory monitoring. Factors such as incentives, conflict and local values may negatively affect the legitimacy and sustainability of participatory monitoring and therefore also need to be addressed.
- Full Text:
- Date Issued: 2010
- Authors: Bolus, Cosman
- Date: 2010
- Subjects: Conservation of natural resources -- South Africa , Natural resources -- South Africa -- Management , Community development -- South Africa -- Citizen participation , Conservation of natural resources -- Social aspects -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4743 , http://hdl.handle.net/10962/d1006948 , Conservation of natural resources -- South Africa , Natural resources -- South Africa -- Management , Community development -- South Africa -- Citizen participation , Conservation of natural resources -- Social aspects -- South Africa
- Description: Internationally there is an increasing focus on involving local communities in natural resource management and monitoring. Monitoring methods which are professionally driven appear to be inadequate to deal with the monitoring of natural resource use and biodiversity conservation, globally. This is especially evident in areas such as South African rural communal land. Two community based natural resource management (CBNRM) programmes in areas which are communally governed in the Eastern Cape, South Africa, namely Nqabara and Machubeni, were used as part of this research study. This thesis identified and tested potentially simple and cost effective monitoring methods related to the utilization of the local rangelands and indigenous forests. The criteria that were tested include 1) appropriateness and effectiveness in measuring change, and 2) contribution to building adaptive capacity among local land managers through learning. The criteria were assessed using a scoring system for each monitoring method in order to evaluate their strengths and weaknesses . This was done by using both quantitative and qualitative data. Contribution to building adaptive capacity was assessed by evaluating technical capacity gained, local ecological knowledge contributed and learning by participants. This was done using qualitative data. The results show that the monitoring methods had different strengths and weaknesses in relation to the criteria, making them more appropriate for different priorities such as effectively measuring change or building adaptive capacity. It is argued that an adaptive approach is a useful component in the participatory monitoring process. An adaptive framework was developed from lessons learnt in this study for collaborative monitoring. Challenges such as low literacy levels and adequate training still need to be addressed to strengthen efforts towards participatory monitoring. Factors such as incentives, conflict and local values may negatively affect the legitimacy and sustainability of participatory monitoring and therefore also need to be addressed.
- Full Text:
- Date Issued: 2010
Adult adjustment and independent functioning in individuals who were raised in a children's home
- Authors: Bond, Susan Jane
- Date: 2010
- Subjects: Child welfare , Foster children -- Counseling of , Children -- Institutional care , Adjustment (Psychology)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9994 , http://hdl.handle.net/10948/d1008161 , Child welfare , Foster children -- Counseling of , Children -- Institutional care , Adjustment (Psychology)
- Description: Children are placed in a children’s home when a Presiding Officer finds them to be in need of care and when there is no viable community placement alternative. The body of literature on children’s homes focuses primarily on the negative effects and outcomes of such statutory placement. The assertion that children who grew up in children’s homes will continue to use the services of welfare organisations in adulthood, is supported by the researcher’s observation as a practicing social worker. This, and the study of available literature, resulted in this qualitative, exploratory-descriptive and contextual research study with the following goal: to enhance the understanding of how intervention programmes at children’s homes can contribute to adult adjustment and independent functioning of those children in their care. A purposive sampling method was used to identify ten participants who had spent at least 2 years in a children’s home and who had been discharged from the children’s home at least 5 years ago (to the date of data collection). The sample was drawn from clients at non governmental social welfare agencies who fitted the sampling criteria. The data was collected via semi-structured interviews using an interview guide, which were recorded, transcribed and then analysed using a thematic content analysis approach. The results of the study may be used to develop and implement meaningful intervention strategies for individuals placed in children’s homes.
- Full Text:
- Date Issued: 2010
- Authors: Bond, Susan Jane
- Date: 2010
- Subjects: Child welfare , Foster children -- Counseling of , Children -- Institutional care , Adjustment (Psychology)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9994 , http://hdl.handle.net/10948/d1008161 , Child welfare , Foster children -- Counseling of , Children -- Institutional care , Adjustment (Psychology)
- Description: Children are placed in a children’s home when a Presiding Officer finds them to be in need of care and when there is no viable community placement alternative. The body of literature on children’s homes focuses primarily on the negative effects and outcomes of such statutory placement. The assertion that children who grew up in children’s homes will continue to use the services of welfare organisations in adulthood, is supported by the researcher’s observation as a practicing social worker. This, and the study of available literature, resulted in this qualitative, exploratory-descriptive and contextual research study with the following goal: to enhance the understanding of how intervention programmes at children’s homes can contribute to adult adjustment and independent functioning of those children in their care. A purposive sampling method was used to identify ten participants who had spent at least 2 years in a children’s home and who had been discharged from the children’s home at least 5 years ago (to the date of data collection). The sample was drawn from clients at non governmental social welfare agencies who fitted the sampling criteria. The data was collected via semi-structured interviews using an interview guide, which were recorded, transcribed and then analysed using a thematic content analysis approach. The results of the study may be used to develop and implement meaningful intervention strategies for individuals placed in children’s homes.
- Full Text:
- Date Issued: 2010
Gender and racial stereotyping in rape coverage: an analysis of rape coverage in Grocott's Mail
- Authors: Bonnes, Stephanie Marie
- Date: 2010
- Subjects: Grocott's Mail (Grahamstown, South Africa) Rape in mass media Rape -- South Africa Stereotypes (Social psychology) in mass media Sexism in mass media Racism in mass media Women -- Crimes against -- South Africa Violence in mass media Sex discrimination against women -- South Africa Journalism -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2762 , http://hdl.handle.net/10962/d1002972
- Description: This thesis analyzes rape coverage in a Grahamstown newspaper, Grocott’s Mail. Critical discourse analysis is used to discuss and analyze articles about rape that appear in Grocott’s Mail between October 14th 2008 and October 29th 2009. Drawing on existing literature on ‘rape myths’ in media coverage of rape, this thesis argues that Grocott’s Mail perpetuates racial and gender stereotypes through the way in which it reports on rape. While not all of the articles included in the analysis use rape myths, most use one or more when discussing rape incidents. Specifically, Grocott’s Mail tends to use rape myths that blame the victim for the rape and de-emphasize the role of the perpetrator in the rape. This is problematic as it sustains existing racial and gender inequalities.
- Full Text:
- Date Issued: 2010
- Authors: Bonnes, Stephanie Marie
- Date: 2010
- Subjects: Grocott's Mail (Grahamstown, South Africa) Rape in mass media Rape -- South Africa Stereotypes (Social psychology) in mass media Sexism in mass media Racism in mass media Women -- Crimes against -- South Africa Violence in mass media Sex discrimination against women -- South Africa Journalism -- South Africa -- Grahamstown
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2762 , http://hdl.handle.net/10962/d1002972
- Description: This thesis analyzes rape coverage in a Grahamstown newspaper, Grocott’s Mail. Critical discourse analysis is used to discuss and analyze articles about rape that appear in Grocott’s Mail between October 14th 2008 and October 29th 2009. Drawing on existing literature on ‘rape myths’ in media coverage of rape, this thesis argues that Grocott’s Mail perpetuates racial and gender stereotypes through the way in which it reports on rape. While not all of the articles included in the analysis use rape myths, most use one or more when discussing rape incidents. Specifically, Grocott’s Mail tends to use rape myths that blame the victim for the rape and de-emphasize the role of the perpetrator in the rape. This is problematic as it sustains existing racial and gender inequalities.
- Full Text:
- Date Issued: 2010
How can educators in the intermediate phase be empowered to cope with the demands they face in an inclusive classroom situation?
- Authors: Bosman, Ysanne Bosman
- Date: 2010
- Subjects: Learning disabilities , Children with disabilities -- Education (Elementary) , Inclusive education , Teachers of problem children , Classroom management , Special education teachers -- Training of , Teachers -- Uganda
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9507 , http://hdl.handle.net/10948/1234 , Learning disabilities , Children with disabilities -- Education (Elementary) , Inclusive education , Teachers of problem children , Classroom management , Special education teachers -- Training of , Teachers -- Uganda
- Description: The rationale of my research was to make sure that all learners are treated as equals in the education afforded to them. The researcher noticed that not all educators in mainstream schools facing learners experiencing learning problems could deal with the Curriculum and that many had difficulty in coping in an inclusive classrooms setting. Furthermore, the researcher noticed that many educators percieve that they did not have the knowledge and skills to identify and support learners experiencing learning problems. Consequently, the educators felt that they could not effectively help these learners in their learning progress. While the educators struggle to cope, learners ended up having to repeat a grade or being promoted to the next grade without having attained the neccesary skills yet. The researcher set out to research what the available literature stated about how educators could be empowered to cope with teaching learners experiencing learning problems in an inclusive classroom situation. For this research study, a qualitative approach was followed, as it best matched the type of interactive investigation considered necessary. Due to time, financial and resources constraints, purpose sampling was used as the most effective method of yielding data. The qualitative approach embraced a multi-perspective approach, in terms of which methods of data collection were used, such as collection questionnaires, conducting interviews and using observations. The researcher trusts that her understanding as presented in the research findings and the recommendations made will benefit not only herself, but will empower all educators coping with the stress of teaching learners experiencing learning problems and improving their skills and self-esteem in the educational environment.
- Full Text:
- Date Issued: 2010
- Authors: Bosman, Ysanne Bosman
- Date: 2010
- Subjects: Learning disabilities , Children with disabilities -- Education (Elementary) , Inclusive education , Teachers of problem children , Classroom management , Special education teachers -- Training of , Teachers -- Uganda
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:9507 , http://hdl.handle.net/10948/1234 , Learning disabilities , Children with disabilities -- Education (Elementary) , Inclusive education , Teachers of problem children , Classroom management , Special education teachers -- Training of , Teachers -- Uganda
- Description: The rationale of my research was to make sure that all learners are treated as equals in the education afforded to them. The researcher noticed that not all educators in mainstream schools facing learners experiencing learning problems could deal with the Curriculum and that many had difficulty in coping in an inclusive classrooms setting. Furthermore, the researcher noticed that many educators percieve that they did not have the knowledge and skills to identify and support learners experiencing learning problems. Consequently, the educators felt that they could not effectively help these learners in their learning progress. While the educators struggle to cope, learners ended up having to repeat a grade or being promoted to the next grade without having attained the neccesary skills yet. The researcher set out to research what the available literature stated about how educators could be empowered to cope with teaching learners experiencing learning problems in an inclusive classroom situation. For this research study, a qualitative approach was followed, as it best matched the type of interactive investigation considered necessary. Due to time, financial and resources constraints, purpose sampling was used as the most effective method of yielding data. The qualitative approach embraced a multi-perspective approach, in terms of which methods of data collection were used, such as collection questionnaires, conducting interviews and using observations. The researcher trusts that her understanding as presented in the research findings and the recommendations made will benefit not only herself, but will empower all educators coping with the stress of teaching learners experiencing learning problems and improving their skills and self-esteem in the educational environment.
- Full Text:
- Date Issued: 2010
Motivation and complexity : an exploration of a complexity approach in employee motivation with specific focus on a Lacanian model of desire
- Authors: Botha, Anton Ivan
- Date: 2010
- Subjects: Employee motivation , Employee morale , Incentive awards
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9400 , http://hdl.handle.net/10948/1232 , Employee motivation , Employee morale , Incentive awards
- Description: Since employee motivation contributes to overall organisational success, reliable motivation theory should inform management and reward practices. Yet, motivation theory is currently in a state of paralysis, with no constructive theorising taking place. Analysis of its methodological presuppositions reveals that it relies on out-dated binary thinking, prioritising, e.g. either a ‘machine-like’ (body driven) or ‘god-like’ (rationally driven) understanding of humanity. In this study it is argued that the revival of motivation theory requires a paradigmatic shift towards a complexity methodology because human motivation was found to be a complex system and must be theorised accordingly. It was found that McAdams’ theory of personality which brought together personality traits, conditioning, and motives could form the basis of a complex theory of motivation. On this basis, a complex model was developed which incorporated elements of existing motivational theories. This model proposed that drives, which motivate behaviour, are a combination of instincts, needs, and desires, mediated by personality traits, rational processing, and conditioning. All of these interconnected elements, as well as biological and environmental conditions, have an impact on, and are influenced by one another. For the purposes of understanding employee motivation the element of desire was isolated as a potential means to value segment employees. A Lacanian theory was utilised to elaborate on the element of desire. This theory postulated that individuals tend to display a dominance is one of nine kinds and modes of desire. An instrument was developed to test the applicability of the Lacanian model. It was developed in five phases which included three pilot studies and two samplings. A total of 591 respondents participated in the empirical research study with 428 in the first sample and 70 in the second; the remaining 93 made up the pilot studies. Unlike the initial version of the instrument used in the first sample (n=428) the data obtained by the last version (n=70) revealed that the instrument held some form of reliability and validity. Once analysed through descriptive and inferential statistics the data supported the view that individuals tended to display dominance in a kind and mode of desire as per the Lacanian model, and sufficient variance existed to preliminarily conclude that this model could be used as a means to value segment employees. Recommendations were as follows: (1) that complexity methodology should inform future motivation theorising, (2) that the proposed complexity models be further empirically tested, (3) that an adequately complex, flexible rewards system be considered, (4) that both managers and employees make use of the developed instrument to aid them in the selection of rewards that will lead to increased satisfaction.
- Full Text:
- Date Issued: 2010
- Authors: Botha, Anton Ivan
- Date: 2010
- Subjects: Employee motivation , Employee morale , Incentive awards
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9400 , http://hdl.handle.net/10948/1232 , Employee motivation , Employee morale , Incentive awards
- Description: Since employee motivation contributes to overall organisational success, reliable motivation theory should inform management and reward practices. Yet, motivation theory is currently in a state of paralysis, with no constructive theorising taking place. Analysis of its methodological presuppositions reveals that it relies on out-dated binary thinking, prioritising, e.g. either a ‘machine-like’ (body driven) or ‘god-like’ (rationally driven) understanding of humanity. In this study it is argued that the revival of motivation theory requires a paradigmatic shift towards a complexity methodology because human motivation was found to be a complex system and must be theorised accordingly. It was found that McAdams’ theory of personality which brought together personality traits, conditioning, and motives could form the basis of a complex theory of motivation. On this basis, a complex model was developed which incorporated elements of existing motivational theories. This model proposed that drives, which motivate behaviour, are a combination of instincts, needs, and desires, mediated by personality traits, rational processing, and conditioning. All of these interconnected elements, as well as biological and environmental conditions, have an impact on, and are influenced by one another. For the purposes of understanding employee motivation the element of desire was isolated as a potential means to value segment employees. A Lacanian theory was utilised to elaborate on the element of desire. This theory postulated that individuals tend to display a dominance is one of nine kinds and modes of desire. An instrument was developed to test the applicability of the Lacanian model. It was developed in five phases which included three pilot studies and two samplings. A total of 591 respondents participated in the empirical research study with 428 in the first sample and 70 in the second; the remaining 93 made up the pilot studies. Unlike the initial version of the instrument used in the first sample (n=428) the data obtained by the last version (n=70) revealed that the instrument held some form of reliability and validity. Once analysed through descriptive and inferential statistics the data supported the view that individuals tended to display dominance in a kind and mode of desire as per the Lacanian model, and sufficient variance existed to preliminarily conclude that this model could be used as a means to value segment employees. Recommendations were as follows: (1) that complexity methodology should inform future motivation theorising, (2) that the proposed complexity models be further empirically tested, (3) that an adequately complex, flexible rewards system be considered, (4) that both managers and employees make use of the developed instrument to aid them in the selection of rewards that will lead to increased satisfaction.
- Full Text:
- Date Issued: 2010
Nest site fidelity and nest site selection of loggerhead, Caretta Caretta, and leatherback, dermochelys coriacea, turtles in KwaZulu-Natal, South Africa
- Authors: Botha, Marié
- Date: 2010
- Subjects: Sea turtles -- South Africa -- KwaZulu-Natal , Loggerhead turtle -- South Africa -- KwaZulu-Natal , Leatherback turtle -- South Africa -- KwaZulu-Natal , Nest building , Turtles -- Habitat
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10696 , http://hdl.handle.net/10948/1233 , Sea turtles -- South Africa -- KwaZulu-Natal , Loggerhead turtle -- South Africa -- KwaZulu-Natal , Leatherback turtle -- South Africa -- KwaZulu-Natal , Nest building , Turtles -- Habitat
- Description: Loggerhead and leatherback sea turtles nest on the beaches of the north-eastern portion of Kwazulu-Natal within the iSimangaliso Wetland Park. Loggerheads place ~60 percent of all nests within an 8 km stretch of beach, whereas leatherbacks tend to space their nests more evenly along the entire length of the monitoring area. The study aimed to determine nest site fidelity of loggerheads and leatherbacks (using four decades of nesting data housed by Ezemvelo KZN Wildlife) and the factors that influence nest site selection of both species within the 56 km of turtle monitoring area (32N to 100S) and the 5 km area of high-density loggerhead nesting (0N to 12N). The effectiveness of nest site selection was then determined through the hatching success of loggerheads over the 5km area (0N to 12N). Results showed that loggerheads show a high degree of nest site fidelity (~3 km) with nest site fidelity of individuals increasing over subsequent seasons of nesting, as well as these individuals using the same stretches of beach for nesting (the most popular area being 1N to 4N for repeat nesters). Leatherbacks displayed nest site fidelity of ~9 km and this did not increase over successive seasons of nesting. In terms of nest site selection, loggerheads and leatherbacks both avoided areas where low shore rock was present, whereas both species preferred nesting on beaches of intermediate morphodynamic state. Leatherback nesting was significantly higher in areas with wider surf zones. Both species were able to surpass the high water mark when nesting as nests below this point would be almost certainly doomed. Hatching success of loggerheads was comparative to high (83 %) relative to other studies, however, nest success varied across the beach from beacon 1N to 12N. Areas where highest nest success was observed were not areas of highest nest density presumably due to artificial lighting. Results from this study increase our understanding of the evolutionary biology of loggerhead and leatherback turtles in South Africa and the effectiveness of loggerhead nest site selection through hatching success.
- Full Text:
- Date Issued: 2010
- Authors: Botha, Marié
- Date: 2010
- Subjects: Sea turtles -- South Africa -- KwaZulu-Natal , Loggerhead turtle -- South Africa -- KwaZulu-Natal , Leatherback turtle -- South Africa -- KwaZulu-Natal , Nest building , Turtles -- Habitat
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10696 , http://hdl.handle.net/10948/1233 , Sea turtles -- South Africa -- KwaZulu-Natal , Loggerhead turtle -- South Africa -- KwaZulu-Natal , Leatherback turtle -- South Africa -- KwaZulu-Natal , Nest building , Turtles -- Habitat
- Description: Loggerhead and leatherback sea turtles nest on the beaches of the north-eastern portion of Kwazulu-Natal within the iSimangaliso Wetland Park. Loggerheads place ~60 percent of all nests within an 8 km stretch of beach, whereas leatherbacks tend to space their nests more evenly along the entire length of the monitoring area. The study aimed to determine nest site fidelity of loggerheads and leatherbacks (using four decades of nesting data housed by Ezemvelo KZN Wildlife) and the factors that influence nest site selection of both species within the 56 km of turtle monitoring area (32N to 100S) and the 5 km area of high-density loggerhead nesting (0N to 12N). The effectiveness of nest site selection was then determined through the hatching success of loggerheads over the 5km area (0N to 12N). Results showed that loggerheads show a high degree of nest site fidelity (~3 km) with nest site fidelity of individuals increasing over subsequent seasons of nesting, as well as these individuals using the same stretches of beach for nesting (the most popular area being 1N to 4N for repeat nesters). Leatherbacks displayed nest site fidelity of ~9 km and this did not increase over successive seasons of nesting. In terms of nest site selection, loggerheads and leatherbacks both avoided areas where low shore rock was present, whereas both species preferred nesting on beaches of intermediate morphodynamic state. Leatherback nesting was significantly higher in areas with wider surf zones. Both species were able to surpass the high water mark when nesting as nests below this point would be almost certainly doomed. Hatching success of loggerheads was comparative to high (83 %) relative to other studies, however, nest success varied across the beach from beacon 1N to 12N. Areas where highest nest success was observed were not areas of highest nest density presumably due to artificial lighting. Results from this study increase our understanding of the evolutionary biology of loggerhead and leatherback turtles in South Africa and the effectiveness of loggerhead nest site selection through hatching success.
- Full Text:
- Date Issued: 2010
Cultural villages inherited tradition and "African culture": a case study of Mgwali Cultural Village in the Eastern Cape
- Authors: Bovana, Solomzi Victor
- Date: 2010
- Subjects: Tourism -- South Africa -- Eastern Cape , Heritage tourism -- South Africa -- Eastern Cape , Culture and tourism -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA (History)
- Identifier: vital:11537 , http://hdl.handle.net/10353/552 , Tourism -- South Africa -- Eastern Cape , Heritage tourism -- South Africa -- Eastern Cape , Culture and tourism -- South Africa -- Eastern Cape
- Description: A growing number of studies concerning cultural villages have in most instances tended to focus on the cultural village as almost legitimately self-explanatory and have not been particularly concerned with either how a particular history is produced in and through these villages, or with the ways that particular discourses and practices associated with heritage, tourism, community and development intersect in the production of these meanings. As such Mgwali Cultural Village seemed to promise something different in the form of cultural villages. The thesis argues that Mgwali Cultural Village is unique in the history of cultural villages in that it moves away from presenting a cultural village in Africa as tribal and primitive. It does this by opening up spaces for other aspects such as Christianity and resistance politics, story of Tiyo Soga rather than focusing and confining itself only to aspects cultural portraying Africans and traditional. It is imperative that cultural villages ought to be understood within a broader framework and context where its definition and presentation is not trapped into an anthropological paradigm thinking of exploring and discovering something new by tourists which they are not familiar with. However, the thesis also argues that much as Mgwali Cultural Village promised something new from the known through depiction of other aspects, those histories seem to be absent or marginal at the Cultural Village. The only aspects that are fore grounded are traditions and culture thus freezing Mgwali as a village and its people in time as if they have not evolved and its cultures are static and not dynamic. The thesis therefore explores all those contradictions, silences, or absence thereof of other stories and histories.
- Full Text:
- Date Issued: 2010
- Authors: Bovana, Solomzi Victor
- Date: 2010
- Subjects: Tourism -- South Africa -- Eastern Cape , Heritage tourism -- South Africa -- Eastern Cape , Culture and tourism -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA (History)
- Identifier: vital:11537 , http://hdl.handle.net/10353/552 , Tourism -- South Africa -- Eastern Cape , Heritage tourism -- South Africa -- Eastern Cape , Culture and tourism -- South Africa -- Eastern Cape
- Description: A growing number of studies concerning cultural villages have in most instances tended to focus on the cultural village as almost legitimately self-explanatory and have not been particularly concerned with either how a particular history is produced in and through these villages, or with the ways that particular discourses and practices associated with heritage, tourism, community and development intersect in the production of these meanings. As such Mgwali Cultural Village seemed to promise something different in the form of cultural villages. The thesis argues that Mgwali Cultural Village is unique in the history of cultural villages in that it moves away from presenting a cultural village in Africa as tribal and primitive. It does this by opening up spaces for other aspects such as Christianity and resistance politics, story of Tiyo Soga rather than focusing and confining itself only to aspects cultural portraying Africans and traditional. It is imperative that cultural villages ought to be understood within a broader framework and context where its definition and presentation is not trapped into an anthropological paradigm thinking of exploring and discovering something new by tourists which they are not familiar with. However, the thesis also argues that much as Mgwali Cultural Village promised something new from the known through depiction of other aspects, those histories seem to be absent or marginal at the Cultural Village. The only aspects that are fore grounded are traditions and culture thus freezing Mgwali as a village and its people in time as if they have not evolved and its cultures are static and not dynamic. The thesis therefore explores all those contradictions, silences, or absence thereof of other stories and histories.
- Full Text:
- Date Issued: 2010
Integer optimisation for the selection of a fantasy league cricket team
- Authors: Brettenny, Warren James
- Date: 2010
- Subjects: Sports -- Research -- Methodology , Teamwork (Sports) , Cricket players
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10565 , http://hdl.handle.net/10948/1230 , Sports -- Research -- Methodology , Teamwork (Sports) , Cricket players
- Description: Sports fans often scrutinise the team selection strategies employed by their favourite team's coach or selection panel. Many of these fans believe that they can perform the selection process far better than those tasked with the responsibility. Fantasy leagues, provide a platform for fans to test their hand at this selection procedure. Twenty20 cricket is a new and exciting form of cricket and has become very popular in recent years. This research focuses on bringing these concepts together by proposing a binary integer program to determine a team selection strategy for fantasy league cricket. This is done in a Twenty20 setting. The approach used in this study focuses on evaluating the effectiveness of previously developed performance measures in a fantasy league setting. Adjustments to these measures are made and new measures are proposed. These measures are then used to select a fantasy league team using a prospective approach. This is done to provide fantasy league participants with a mathematical procedure for fantasy league team selection.
- Full Text:
- Date Issued: 2010
- Authors: Brettenny, Warren James
- Date: 2010
- Subjects: Sports -- Research -- Methodology , Teamwork (Sports) , Cricket players
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10565 , http://hdl.handle.net/10948/1230 , Sports -- Research -- Methodology , Teamwork (Sports) , Cricket players
- Description: Sports fans often scrutinise the team selection strategies employed by their favourite team's coach or selection panel. Many of these fans believe that they can perform the selection process far better than those tasked with the responsibility. Fantasy leagues, provide a platform for fans to test their hand at this selection procedure. Twenty20 cricket is a new and exciting form of cricket and has become very popular in recent years. This research focuses on bringing these concepts together by proposing a binary integer program to determine a team selection strategy for fantasy league cricket. This is done in a Twenty20 setting. The approach used in this study focuses on evaluating the effectiveness of previously developed performance measures in a fantasy league setting. Adjustments to these measures are made and new measures are proposed. These measures are then used to select a fantasy league team using a prospective approach. This is done to provide fantasy league participants with a mathematical procedure for fantasy league team selection.
- Full Text:
- Date Issued: 2010
The child accused in the criminal justice system
- Authors: Brink, Ronelle Bonita
- Date: 2010
- Subjects: Children's rights -- South Africa , Children -- Legal status, laws, etc -- South Africa , Children's rights -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10178 , http://hdl.handle.net/10948/1229 , Children's rights -- South Africa , Children -- Legal status, laws, etc -- South Africa , Children's rights -- Law and legislation -- South Africa
- Description: The high level of crime in South Africa raises the question about the failures of the criminal justice system on the one hand, and South Africa’s social policies on the other. Young people in South Africa can disproportionately be both victims and perpetrators of crime in the Republic of South Africa. The child accused in conflict with the law is dealt with in much the same way as their adult counterparts, as the criminal justice system was designed by adults for adults. South Africa became a signatory to the United Nations Convention on the Rights of the Child 19891(hereinafter referred to as UNCRC) on 16 June 1995. The UNCRC provides a backdrop to section 28 of the Constitution of the Republic of South Africa Act.2 Article 3(1) of the UNCRC provides as follows: “in all actions concerning children, whether undertaken by public or private social welfare institutions, courts of law, administrative authorities or legislative bodies, the best interests of the child shall be primary consideration.” South Africa is therefore according to article 40(3) of the UNCRC obliged to “establish laws, procedures, authorities and institutions specifically applicable to children in conflict with the law”.3 In terms of article 40(1) of the UNCRC “State Parties recognise the right of every child alleged as, accused of, or recognised as having infringed the penal law to be treated in a manner consistent with the promotion of the child’s sense of dignity and worth, which reinforces the child’s respect for the human rights and fundamental freedoms of others and which takes into account the child’s age and the desirability of promoting the child’s reintegration and the child’s assuming a constructive role in society.”4 1 Adopted by the General Assembly resolution 44/25 on 20 November 1989. 2 The Constitution of the Republic of South Africa Act, Act 108 of 1996. Hereinafter referred to as the “Constitution”. 3 South Law Reform Commission Discussion Paper 96. 4 United Nations Convention on the Rights of the Child adopted by the General Assembly resolution 44/25 on 20 November 1989. iv Synopsis 2003 states that “the Ratification of the UNCRC by the South African government in 1995 set the scene for broad-reaching policy and legislative change”.5 The Constitution includes a section protecting children’s rights, which includes the statement that children have the right not to be detained except as a measure of last resort and then for the shortest appropriate period of time, separate from adults and in conditions that take account of his/her age. 6 After being off Parliament’s agenda since 2003, the Child Justice Act7 has recently been reintroduced. The Act aims to ensure consistent, fair and appropriate treatment of the child accused in conflict with the law. The question arises whether the South African Criminal Justice system involving the child accused adequately recognises and protects the interests of the child accused, particularly in view of the present international legal position.
- Full Text:
- Date Issued: 2010
- Authors: Brink, Ronelle Bonita
- Date: 2010
- Subjects: Children's rights -- South Africa , Children -- Legal status, laws, etc -- South Africa , Children's rights -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10178 , http://hdl.handle.net/10948/1229 , Children's rights -- South Africa , Children -- Legal status, laws, etc -- South Africa , Children's rights -- Law and legislation -- South Africa
- Description: The high level of crime in South Africa raises the question about the failures of the criminal justice system on the one hand, and South Africa’s social policies on the other. Young people in South Africa can disproportionately be both victims and perpetrators of crime in the Republic of South Africa. The child accused in conflict with the law is dealt with in much the same way as their adult counterparts, as the criminal justice system was designed by adults for adults. South Africa became a signatory to the United Nations Convention on the Rights of the Child 19891(hereinafter referred to as UNCRC) on 16 June 1995. The UNCRC provides a backdrop to section 28 of the Constitution of the Republic of South Africa Act.2 Article 3(1) of the UNCRC provides as follows: “in all actions concerning children, whether undertaken by public or private social welfare institutions, courts of law, administrative authorities or legislative bodies, the best interests of the child shall be primary consideration.” South Africa is therefore according to article 40(3) of the UNCRC obliged to “establish laws, procedures, authorities and institutions specifically applicable to children in conflict with the law”.3 In terms of article 40(1) of the UNCRC “State Parties recognise the right of every child alleged as, accused of, or recognised as having infringed the penal law to be treated in a manner consistent with the promotion of the child’s sense of dignity and worth, which reinforces the child’s respect for the human rights and fundamental freedoms of others and which takes into account the child’s age and the desirability of promoting the child’s reintegration and the child’s assuming a constructive role in society.”4 1 Adopted by the General Assembly resolution 44/25 on 20 November 1989. 2 The Constitution of the Republic of South Africa Act, Act 108 of 1996. Hereinafter referred to as the “Constitution”. 3 South Law Reform Commission Discussion Paper 96. 4 United Nations Convention on the Rights of the Child adopted by the General Assembly resolution 44/25 on 20 November 1989. iv Synopsis 2003 states that “the Ratification of the UNCRC by the South African government in 1995 set the scene for broad-reaching policy and legislative change”.5 The Constitution includes a section protecting children’s rights, which includes the statement that children have the right not to be detained except as a measure of last resort and then for the shortest appropriate period of time, separate from adults and in conditions that take account of his/her age. 6 After being off Parliament’s agenda since 2003, the Child Justice Act7 has recently been reintroduced. The Act aims to ensure consistent, fair and appropriate treatment of the child accused in conflict with the law. The question arises whether the South African Criminal Justice system involving the child accused adequately recognises and protects the interests of the child accused, particularly in view of the present international legal position.
- Full Text:
- Date Issued: 2010
Photophysical studies of zinc and indium tetraaminophthalocyanines in the presence of CdTe quantum dots
- Authors: Britton, Jonathan
- Date: 2010
- Subjects: Indium , Zinc , Quantum dots , Phthalocyanines , Photochemotherapy , Nonlinear optics , Nanocrystals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4332 , http://hdl.handle.net/10962/d1004993 , Indium , Zinc , Quantum dots , Phthalocyanines , Photochemotherapy , Nonlinear optics , Nanocrystals
- Description: CdTe QDs capped with mercaptopropionic acid (MPA) and thioglycolic acid (TGA) were covalently linked to zinc and indium tetraaminophthalocyanines (TAPcs) using N-ethyl-N(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxy succinimide (NHS) as the coupling agents. The results presented give evidence in favour of formation of an amide bond between the MTAPc and CdTe QDs. Both the linked ZnTAPc–QD complexes and the mixture of QDs and ZnTAPc (without chemical linking) showed Förster resonance energy transfer (FRET), though the linked showed less FRET, whereas the QD interactions with InTAPc yielded no evidence of FRET. Both MTAPcs quenched the QDs emission, with quenching constants of the order of 103–104M−1, binding constants of the order of 108-1010M-1 and the number of binding sites for the MTAPc upon the QD being 2. High energy transfer efficiencies were obtained (in some cases as high as 93%), due to the low donor to acceptor distances. Lastly, both MTAPc were shown to be poor optical limiters because their imaginary third-order susceptibility (Im[χ(3)]) was of the order of 10-17-10-16 (optimal range is 10-9-10-11), the hyperpolarizability (γ) of the order of 10-37-10-36 (optimal range is 10-29-10-34) and the k values were above one but below ten.
- Full Text:
- Date Issued: 2010
- Authors: Britton, Jonathan
- Date: 2010
- Subjects: Indium , Zinc , Quantum dots , Phthalocyanines , Photochemotherapy , Nonlinear optics , Nanocrystals
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4332 , http://hdl.handle.net/10962/d1004993 , Indium , Zinc , Quantum dots , Phthalocyanines , Photochemotherapy , Nonlinear optics , Nanocrystals
- Description: CdTe QDs capped with mercaptopropionic acid (MPA) and thioglycolic acid (TGA) were covalently linked to zinc and indium tetraaminophthalocyanines (TAPcs) using N-ethyl-N(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxy succinimide (NHS) as the coupling agents. The results presented give evidence in favour of formation of an amide bond between the MTAPc and CdTe QDs. Both the linked ZnTAPc–QD complexes and the mixture of QDs and ZnTAPc (without chemical linking) showed Förster resonance energy transfer (FRET), though the linked showed less FRET, whereas the QD interactions with InTAPc yielded no evidence of FRET. Both MTAPcs quenched the QDs emission, with quenching constants of the order of 103–104M−1, binding constants of the order of 108-1010M-1 and the number of binding sites for the MTAPc upon the QD being 2. High energy transfer efficiencies were obtained (in some cases as high as 93%), due to the low donor to acceptor distances. Lastly, both MTAPc were shown to be poor optical limiters because their imaginary third-order susceptibility (Im[χ(3)]) was of the order of 10-17-10-16 (optimal range is 10-9-10-11), the hyperpolarizability (γ) of the order of 10-37-10-36 (optimal range is 10-29-10-34) and the k values were above one but below ten.
- Full Text:
- Date Issued: 2010
An investigation into the competencies associated with change leadership : a case study analysis of an information technology organisation
- Authors: Britton, Leola
- Date: 2010
- Subjects: Organizational change -- Management
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:16138 , http://hdl.handle.net/10948/1227 , Organizational change -- Management
- Description: In this research, the researcher-consultant together with the management corps of a merged IT organisation, embarked on a process of participative research with the aim to identify the competencies and skills that are required of the management-leadership corps to drive a process of change management and to ensure the organisation will be characterised by sustained growth and development. In using participative research methodology, qualitative data was mainly gathered through informal interviews and focus group sessions to identify the competencies and skills that are defined as important for the change manager-cum-leader role within the merged IT organisation. In addition, a matrix was compiled to enable each manager/leader to undertake a self-assessment of how capable they are in using the identified competencies and skills. The outcome of the assessment provided an indication of the areas of competencies and skills that through various interventions would enable the management-leadership corps to deal with the challenges of change, as well as to guide those that report to them through a process of change. While the management-leadership corps – referred to as the Executive, Senior, and Middle Management cohorts – all require enhancing their change management / leadership competencies and skills capability, it is the Middle Management cohort that is better equipped to perform their change management and leadership role. During the research, focus group sessions enhanced a participative methodology to enable identification of competencies important to the IT Company’s vision, mission and core values, as well as opportunity to identify interventions that will encourage an on-going process of change, growth and development. However, there is indication that the members of the Executive and Senior Management cohorts assessed themselves higher on those competencies that relate directly to their functionary roles, rather than the change management-leadership role. The scope of a treatise limits an in-depth and expanded research endeavour; however, the methodology used provided information on how a platform for participation in a change management process can be enabled. Furthermore, this research gives indication of how a management-leadership strata can ‘buy-in’ to the process of change, growth and development, commencing with the self and, which is aimed to encourage the same in those that share responsibility for sustained growth and development of the IT company. The research is also example of how an applied sociology endeavour can be undertaken.
- Full Text:
- Date Issued: 2010
- Authors: Britton, Leola
- Date: 2010
- Subjects: Organizational change -- Management
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:16138 , http://hdl.handle.net/10948/1227 , Organizational change -- Management
- Description: In this research, the researcher-consultant together with the management corps of a merged IT organisation, embarked on a process of participative research with the aim to identify the competencies and skills that are required of the management-leadership corps to drive a process of change management and to ensure the organisation will be characterised by sustained growth and development. In using participative research methodology, qualitative data was mainly gathered through informal interviews and focus group sessions to identify the competencies and skills that are defined as important for the change manager-cum-leader role within the merged IT organisation. In addition, a matrix was compiled to enable each manager/leader to undertake a self-assessment of how capable they are in using the identified competencies and skills. The outcome of the assessment provided an indication of the areas of competencies and skills that through various interventions would enable the management-leadership corps to deal with the challenges of change, as well as to guide those that report to them through a process of change. While the management-leadership corps – referred to as the Executive, Senior, and Middle Management cohorts – all require enhancing their change management / leadership competencies and skills capability, it is the Middle Management cohort that is better equipped to perform their change management and leadership role. During the research, focus group sessions enhanced a participative methodology to enable identification of competencies important to the IT Company’s vision, mission and core values, as well as opportunity to identify interventions that will encourage an on-going process of change, growth and development. However, there is indication that the members of the Executive and Senior Management cohorts assessed themselves higher on those competencies that relate directly to their functionary roles, rather than the change management-leadership role. The scope of a treatise limits an in-depth and expanded research endeavour; however, the methodology used provided information on how a platform for participation in a change management process can be enabled. Furthermore, this research gives indication of how a management-leadership strata can ‘buy-in’ to the process of change, growth and development, commencing with the self and, which is aimed to encourage the same in those that share responsibility for sustained growth and development of the IT company. The research is also example of how an applied sociology endeavour can be undertaken.
- Full Text:
- Date Issued: 2010
Effect of repeated eccentric demands placed on the lower limb musculature during simulated Rugby Union play
- Authors: Brown, Lisa Gill
- Date: 2010
- Subjects: Sports injuries , Muscles -- Wounds and injuries , Tendons -- Wounds and injuries , Muscles -- Examination , Rugby football injuries , Rugby Union football players
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5114 , http://hdl.handle.net/10962/d1005192 , Sports injuries , Muscles -- Wounds and injuries , Tendons -- Wounds and injuries , Muscles -- Examination , Rugby football injuries , Rugby Union football players
- Description: Epidemiological studies consistently report that muscular strains are a primary injury type in rugby union with the majority of the strains occurring to the quadricep and hamstring musculature. Recently it has been suggested that poor eccentric muscular strength is a precursor to hamstring and quadriceps strains during intermittent sports that require rapid acceleration and deceleration. Despite the high incidence of these muscle injuries in Rugby Union there has been little research into the possible mechanisms involved. Thus, the purpose of this study was to measure the physiological and perceptual responses during a simulated Rugby Union laboratory protocol and further, to identify changes in muscle recruitment patterns and muscle strength over time by comparing this protocol to a continuous, constant load protocol covering the same distance. The experimental condition (EXP) required university level players to perform 80 minutes of simulated rugby union play in a laboratory setting (on a walkway of 22m) which was compared to that of a control condition (CON) which involved subjects covering the same distance, at a constant speed of 4.2km.h-1 on a treadmill. Physiological, biophysical and perceptual responses were measured pre-, at half-time and post-protocol. Heart rate was significantly (p<0.01) greater as a result of EXP in comparison to the CON. Electromyography (EMG) of the vastus medialis was significantly (p<0.01) greater during the CON protocol. The EXP condition elicited higher iEMG activity in the hamstring musculature at all time intervals. In addition the iEMG of the semitendinosus decreased significantly (p<0.01) as a result of the EXP protocol. Peak eccentric knee extensors (EXT) (-13.19%) and flexors (FLEX) (-12.81%) torque decreased significantly during the experimental protocol. After passive half-time (236.67 + 56.27Nm (EXT) and 173.89 + 33.3NM (FLEX)) and at the end of the protocol (220.39 + 55.16Nm and 162.89 + 30.66Nm) reduced relative to pre protocol (253.89 + 54.54Nm and 186.83 + 33.3Nm). Peak eccentric knee extensors did not change during the control protocol. „Central‟ and ‟Local” Rating of Perceived Exertion values were significantly (P<0.01) greater during the EXP protocol with an increased incidence of hamstring discomfort and perceived pain (5 out of 10). The EXP protocol resulted in significantly (p<0.01) increased incidence of delayed onset muscle soreness (DOMS). In conclusion, a stop-start laboratory protocol elicited increased heart rate, negatively impacted on muscle activity of the hamstrings, decreased eccentric strength in the lower limb musculature, resulted in increased ratings of „Central‟ and „Local‟ exertion and increased pain perception and increased incidence of DOMS. Thus, a stop-start rugby specific laboratory protocol has a negative impact on performance. Due to the specificity of the protocol being designed to match the demands of competitive match play it is expected that these changes in heart rate, muscle activity and strength, particularly eccentric strength, will impact negativity on performance during rugby match play and increase the likelihood of injury
- Full Text:
- Date Issued: 2010
- Authors: Brown, Lisa Gill
- Date: 2010
- Subjects: Sports injuries , Muscles -- Wounds and injuries , Tendons -- Wounds and injuries , Muscles -- Examination , Rugby football injuries , Rugby Union football players
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5114 , http://hdl.handle.net/10962/d1005192 , Sports injuries , Muscles -- Wounds and injuries , Tendons -- Wounds and injuries , Muscles -- Examination , Rugby football injuries , Rugby Union football players
- Description: Epidemiological studies consistently report that muscular strains are a primary injury type in rugby union with the majority of the strains occurring to the quadricep and hamstring musculature. Recently it has been suggested that poor eccentric muscular strength is a precursor to hamstring and quadriceps strains during intermittent sports that require rapid acceleration and deceleration. Despite the high incidence of these muscle injuries in Rugby Union there has been little research into the possible mechanisms involved. Thus, the purpose of this study was to measure the physiological and perceptual responses during a simulated Rugby Union laboratory protocol and further, to identify changes in muscle recruitment patterns and muscle strength over time by comparing this protocol to a continuous, constant load protocol covering the same distance. The experimental condition (EXP) required university level players to perform 80 minutes of simulated rugby union play in a laboratory setting (on a walkway of 22m) which was compared to that of a control condition (CON) which involved subjects covering the same distance, at a constant speed of 4.2km.h-1 on a treadmill. Physiological, biophysical and perceptual responses were measured pre-, at half-time and post-protocol. Heart rate was significantly (p<0.01) greater as a result of EXP in comparison to the CON. Electromyography (EMG) of the vastus medialis was significantly (p<0.01) greater during the CON protocol. The EXP condition elicited higher iEMG activity in the hamstring musculature at all time intervals. In addition the iEMG of the semitendinosus decreased significantly (p<0.01) as a result of the EXP protocol. Peak eccentric knee extensors (EXT) (-13.19%) and flexors (FLEX) (-12.81%) torque decreased significantly during the experimental protocol. After passive half-time (236.67 + 56.27Nm (EXT) and 173.89 + 33.3NM (FLEX)) and at the end of the protocol (220.39 + 55.16Nm and 162.89 + 30.66Nm) reduced relative to pre protocol (253.89 + 54.54Nm and 186.83 + 33.3Nm). Peak eccentric knee extensors did not change during the control protocol. „Central‟ and ‟Local” Rating of Perceived Exertion values were significantly (P<0.01) greater during the EXP protocol with an increased incidence of hamstring discomfort and perceived pain (5 out of 10). The EXP protocol resulted in significantly (p<0.01) increased incidence of delayed onset muscle soreness (DOMS). In conclusion, a stop-start laboratory protocol elicited increased heart rate, negatively impacted on muscle activity of the hamstrings, decreased eccentric strength in the lower limb musculature, resulted in increased ratings of „Central‟ and „Local‟ exertion and increased pain perception and increased incidence of DOMS. Thus, a stop-start rugby specific laboratory protocol has a negative impact on performance. Due to the specificity of the protocol being designed to match the demands of competitive match play it is expected that these changes in heart rate, muscle activity and strength, particularly eccentric strength, will impact negativity on performance during rugby match play and increase the likelihood of injury
- Full Text:
- Date Issued: 2010
Advanced monitoring system for bolted connections in vehicle construction
- Authors: Buchmann, Macro
- Date: 2010
- Subjects: Automobiles -- Design and construction , Motor vehicles -- Design and construction , Bolted joints
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9617 , http://hdl.handle.net/10948/1417 , Automobiles -- Design and construction , Motor vehicles -- Design and construction , Bolted joints
- Description: Bolted connections where used from the beginning of vehicle construction for joining two or more parts. The reliability of bolted connections is still a major problem. The objective of this research thesis is focused on an advanced monitoring system for bolted connections in vehicle construction. A mechanical “vibrating test bench”, which was developed by the aeronautical engineer Mr. Junkers, is being adapted, to suite the requirements of the automotive industry. It is designed according to DIN 65151 standards. The bolted connection is tightened to a specific torque to achieve the required preload forces and then exposed to an oscillating elastic shear force. The preload force and their loss are measured in relation to the number of load cycles. The ideal locking mechanism would be, if no settling occurs. Realistic in practice is the remaining of a sufficient preload force which doesn’t decry with time. The aim of this thesis is, to gain knowledge that will assist in the future control of the bolt locking procedure. The test bench can be used to verify the clamping capability of a bolted connection. With the dynamic computer-aided test system it will also be possible to test critical bolted joints and their safety, which reduces the probability of costly product recalls, or even severe cases of failure.
- Full Text:
- Date Issued: 2010
- Authors: Buchmann, Macro
- Date: 2010
- Subjects: Automobiles -- Design and construction , Motor vehicles -- Design and construction , Bolted joints
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9617 , http://hdl.handle.net/10948/1417 , Automobiles -- Design and construction , Motor vehicles -- Design and construction , Bolted joints
- Description: Bolted connections where used from the beginning of vehicle construction for joining two or more parts. The reliability of bolted connections is still a major problem. The objective of this research thesis is focused on an advanced monitoring system for bolted connections in vehicle construction. A mechanical “vibrating test bench”, which was developed by the aeronautical engineer Mr. Junkers, is being adapted, to suite the requirements of the automotive industry. It is designed according to DIN 65151 standards. The bolted connection is tightened to a specific torque to achieve the required preload forces and then exposed to an oscillating elastic shear force. The preload force and their loss are measured in relation to the number of load cycles. The ideal locking mechanism would be, if no settling occurs. Realistic in practice is the remaining of a sufficient preload force which doesn’t decry with time. The aim of this thesis is, to gain knowledge that will assist in the future control of the bolt locking procedure. The test bench can be used to verify the clamping capability of a bolted connection. With the dynamic computer-aided test system it will also be possible to test critical bolted joints and their safety, which reduces the probability of costly product recalls, or even severe cases of failure.
- Full Text:
- Date Issued: 2010
The E.coli RNA degradosome analysis of molecular chaperones and enolase
- Authors: Burger, Adélle
- Date: 2010
- Subjects: Molecular chaperones , Escherichia coli -- Biotechnology , Polyphosphates , Polyphosphates -- Biotechnology , RNA-protein interactions
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3950 , http://hdl.handle.net/10962/d1004009 , Molecular chaperones , Escherichia coli -- Biotechnology , Polyphosphates , Polyphosphates -- Biotechnology , RNA-protein interactions
- Description: Normal mRNA turnover is essential for genetic regulation within cells. The E. coli RNA degradosome, a large multi-component protein complex which originates through specific protein interactions, has been referred to as the “RNA decay machine” and is responsible for mRNA turnover. The degradosome functions to process RNA and its key components have been identified. The scaffold protein is RNase E and it tethers the degradosome to the cytoplasmic membrane. Polynucleotide phosphorylase (PNPase), ATP-dependent RNA helicase (RhlB helicase) and the glycolytic enzyme enolase associate with RNase E to form the degradosome. Polyphosphate kinase associates with the degradosome in substoichiometric amounts, as do the molecular chaperones DnaK and GroEL. The role of DnaK as well as that of enolase in the RNA degradosome is unknown. Very limited research has been conducted on the components of the RNA degradosome under conditions of stress. The aim of this study was to understand the role played by enolase in the assembly of the degradosome under conditions of stress, as well as investigating the protein levels of molecular chaperones under these conditions. The RNA degradosome was successfully purified through its scaffold protein using nickel-affinity chromatography. In vivo studies were performed to investigate the protein levels of DnaK and GroEL present in the degradosome under conditions of heat stress, and whether GroEL could functionally replace DnaK in the degradosome. To investigate the recruitment of enolase to the degradosome under heat stress, a subcellular fractionation was performed to determine the localization of enolase upon heat shock in vivo. The elevated temperature resulted in an increased concentration of enolase in the membrane fraction. To determine whether there is an interaction between enolase and DnaK, enolase activity assays were conducted in vitro. The effect of DnaK on enolase activity was measured upon quantifying DnaK and adding it to the enolase assays. For the first time it was observed that the activity of enolase increased with the addition of substoichiometric amounts of DnaK. This indicates that DnaK may be interacting with the RNA degradosome via enolase.
- Full Text:
- Date Issued: 2010
- Authors: Burger, Adélle
- Date: 2010
- Subjects: Molecular chaperones , Escherichia coli -- Biotechnology , Polyphosphates , Polyphosphates -- Biotechnology , RNA-protein interactions
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3950 , http://hdl.handle.net/10962/d1004009 , Molecular chaperones , Escherichia coli -- Biotechnology , Polyphosphates , Polyphosphates -- Biotechnology , RNA-protein interactions
- Description: Normal mRNA turnover is essential for genetic regulation within cells. The E. coli RNA degradosome, a large multi-component protein complex which originates through specific protein interactions, has been referred to as the “RNA decay machine” and is responsible for mRNA turnover. The degradosome functions to process RNA and its key components have been identified. The scaffold protein is RNase E and it tethers the degradosome to the cytoplasmic membrane. Polynucleotide phosphorylase (PNPase), ATP-dependent RNA helicase (RhlB helicase) and the glycolytic enzyme enolase associate with RNase E to form the degradosome. Polyphosphate kinase associates with the degradosome in substoichiometric amounts, as do the molecular chaperones DnaK and GroEL. The role of DnaK as well as that of enolase in the RNA degradosome is unknown. Very limited research has been conducted on the components of the RNA degradosome under conditions of stress. The aim of this study was to understand the role played by enolase in the assembly of the degradosome under conditions of stress, as well as investigating the protein levels of molecular chaperones under these conditions. The RNA degradosome was successfully purified through its scaffold protein using nickel-affinity chromatography. In vivo studies were performed to investigate the protein levels of DnaK and GroEL present in the degradosome under conditions of heat stress, and whether GroEL could functionally replace DnaK in the degradosome. To investigate the recruitment of enolase to the degradosome under heat stress, a subcellular fractionation was performed to determine the localization of enolase upon heat shock in vivo. The elevated temperature resulted in an increased concentration of enolase in the membrane fraction. To determine whether there is an interaction between enolase and DnaK, enolase activity assays were conducted in vitro. The effect of DnaK on enolase activity was measured upon quantifying DnaK and adding it to the enolase assays. For the first time it was observed that the activity of enolase increased with the addition of substoichiometric amounts of DnaK. This indicates that DnaK may be interacting with the RNA degradosome via enolase.
- Full Text:
- Date Issued: 2010
Goat production in the Northern Cape: what are the impacts of farmer training?
- Authors: Burgess, Roberta
- Date: 2010
- Subjects: Northern Cape (South Africa) Animal culture -- South Africa -- Northern Cape -- Management Animal culture -- Economic aspects -- South Africa -- Northern Cape Goat farmers -- South Africa -- Northern Cape -- Education
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:747 , http://hdl.handle.net/10962/d1003868
- Description: The main millennium development goal is to eradicate extreme poverty and hunger in the world by 2015. South Africa is one of the countries that signed this pledge at the millennium summit in 2000. The Department of Agriculture, has initiated a number of projects to assist farmers and communities with reaching this goal. In the Northern Cape, the commercialization of goats is one such anchor project. The major activities of this project is to train farmers in applied and appropriate production practices, assist them with accessing markets and supporting them with improved livestock. The main aim of this research was to evaluate whether the project has achieved its outcome and whether this outcome, is having an impact on the livelihoods of the farmers involved in the project. After reviewing the literature on evaluation research and programme evaluation across time, the different paradigms and approaches, participatory methodology was used in this study. A case study approach was applied to evaluate the outcomes and effects of the training received by farmers, as part of the commercialization of goats programme. The results of the study proved that the training received by members of the Campbell Agricultural Co-operative Enterprises, changed their goat production practices. The training also had a secondary impact. Trained farmers were imparting (technology transfer) their acquired knowledge to other members of the co-operative. This appeared very effective as all members of the cooperative were farming more scientifically. These changes to the production practices had a positive impact on the livelihoods of the farmers, as their animals were of a better quality and they were able to sell their animals at different markets and for better prices. This has however not commercialized their farming operations as they are still faced with many challenges. These challenges are the lack of a proper marketing structure, access to financial assistance, proper infrastructure and adequate transport for the animals to mention a few. If the Department of Agriculture and Land Affairs is serious about assisting these farmers to move from the status of “emerging farmer” to “commercial farmer” they will have to look at addressing the problems experienced with financial access and access to adequate and appropriate transport.
- Full Text:
- Date Issued: 2010
- Authors: Burgess, Roberta
- Date: 2010
- Subjects: Northern Cape (South Africa) Animal culture -- South Africa -- Northern Cape -- Management Animal culture -- Economic aspects -- South Africa -- Northern Cape Goat farmers -- South Africa -- Northern Cape -- Education
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:747 , http://hdl.handle.net/10962/d1003868
- Description: The main millennium development goal is to eradicate extreme poverty and hunger in the world by 2015. South Africa is one of the countries that signed this pledge at the millennium summit in 2000. The Department of Agriculture, has initiated a number of projects to assist farmers and communities with reaching this goal. In the Northern Cape, the commercialization of goats is one such anchor project. The major activities of this project is to train farmers in applied and appropriate production practices, assist them with accessing markets and supporting them with improved livestock. The main aim of this research was to evaluate whether the project has achieved its outcome and whether this outcome, is having an impact on the livelihoods of the farmers involved in the project. After reviewing the literature on evaluation research and programme evaluation across time, the different paradigms and approaches, participatory methodology was used in this study. A case study approach was applied to evaluate the outcomes and effects of the training received by farmers, as part of the commercialization of goats programme. The results of the study proved that the training received by members of the Campbell Agricultural Co-operative Enterprises, changed their goat production practices. The training also had a secondary impact. Trained farmers were imparting (technology transfer) their acquired knowledge to other members of the co-operative. This appeared very effective as all members of the cooperative were farming more scientifically. These changes to the production practices had a positive impact on the livelihoods of the farmers, as their animals were of a better quality and they were able to sell their animals at different markets and for better prices. This has however not commercialized their farming operations as they are still faced with many challenges. These challenges are the lack of a proper marketing structure, access to financial assistance, proper infrastructure and adequate transport for the animals to mention a few. If the Department of Agriculture and Land Affairs is serious about assisting these farmers to move from the status of “emerging farmer” to “commercial farmer” they will have to look at addressing the problems experienced with financial access and access to adequate and appropriate transport.
- Full Text:
- Date Issued: 2010