The role of protected areas in the conservation and management of fisheries in the Chobe District of Botswana
- Authors: Bakane, Modiegi
- Date: 2017
- Subjects: Cichlids Botswana Chobe District , Protected areas Botswana Chobe District , Fishery management Botswana Chobe District
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7459 , vital:21262
- Description: This study was aimed at better understanding the function of protected areas as a management strategy for the Chobe District fishery in Botswana, by first investigating the relative abundance in fish communities in and outside protected areas and secondly, by performing an assessment of the biology of commercially important large cichlid species viz threespot tilapia Oreochromis andersonii, greenhead tilapia Oreochromis macrochir and redbreast tilapia Coptodon rendalli. In this study, data and specimens were collected during seasonal surveys between September 2014 and April 2015, using the standard graded fleets of gillnets employed in other programmes in the region, together with D-nets, angling and electro-fishing. The study demonstrated that fish communities in the floodplain ecosystems in the Chobe District of Botswana were representative of the region, containing some 70 species in 14 families. This study also demonstrated that for all the species collected, the mean Catch Per Unit Effort (CPUE) by weight for all the species was significantly higher in protected areas (Kruskal Wallis Test; P<0.05) namely, Zibadianja Lagoon (38 ± 31 kg/net.night"1 and Savuti River/marsh 25 ± 19 kg/net.night"1) than in the fished Chobe River floodplains CPUE (6 ± 3 kg/net.night-1). Biological contributions were estimates of longevity, growth and maturity for O. andersonii, O. macrochir and C. rendalli. Age and growth were estimated using sectioned sagittal otoliths. The Von Bertalanffy growth equation from otolith derived length at age was Lt(mm) =298 (1-e-0 59(t=- 098)) for O. andersonii and Lt(mm) = 337 (1-e-0'20(t=-235)) for C. rendalli. The results indicated that protected areas enhanced fish longevity, and fish in protected areas were larger and older than those in exploited areas. Maturity estimates for the large cichlids were consistent with other research in the region and the length-at-50% maturity was estimated as 250mm Lt for O. andersonii, 225 mm Lt for O. macrochir and 210 mm Lt for C. rendalli. Management recommendations are therefore to retain gill net mesh size regulations that ensure that these fish reach maturity and can breed before being harvested and to assess the possibility of increasing the number of protected areas in the district.
- Full Text:
- Authors: Bakane, Modiegi
- Date: 2017
- Subjects: Cichlids Botswana Chobe District , Protected areas Botswana Chobe District , Fishery management Botswana Chobe District
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/7459 , vital:21262
- Description: This study was aimed at better understanding the function of protected areas as a management strategy for the Chobe District fishery in Botswana, by first investigating the relative abundance in fish communities in and outside protected areas and secondly, by performing an assessment of the biology of commercially important large cichlid species viz threespot tilapia Oreochromis andersonii, greenhead tilapia Oreochromis macrochir and redbreast tilapia Coptodon rendalli. In this study, data and specimens were collected during seasonal surveys between September 2014 and April 2015, using the standard graded fleets of gillnets employed in other programmes in the region, together with D-nets, angling and electro-fishing. The study demonstrated that fish communities in the floodplain ecosystems in the Chobe District of Botswana were representative of the region, containing some 70 species in 14 families. This study also demonstrated that for all the species collected, the mean Catch Per Unit Effort (CPUE) by weight for all the species was significantly higher in protected areas (Kruskal Wallis Test; P<0.05) namely, Zibadianja Lagoon (38 ± 31 kg/net.night"1 and Savuti River/marsh 25 ± 19 kg/net.night"1) than in the fished Chobe River floodplains CPUE (6 ± 3 kg/net.night-1). Biological contributions were estimates of longevity, growth and maturity for O. andersonii, O. macrochir and C. rendalli. Age and growth were estimated using sectioned sagittal otoliths. The Von Bertalanffy growth equation from otolith derived length at age was Lt(mm) =298 (1-e-0 59(t=- 098)) for O. andersonii and Lt(mm) = 337 (1-e-0'20(t=-235)) for C. rendalli. The results indicated that protected areas enhanced fish longevity, and fish in protected areas were larger and older than those in exploited areas. Maturity estimates for the large cichlids were consistent with other research in the region and the length-at-50% maturity was estimated as 250mm Lt for O. andersonii, 225 mm Lt for O. macrochir and 210 mm Lt for C. rendalli. Management recommendations are therefore to retain gill net mesh size regulations that ensure that these fish reach maturity and can breed before being harvested and to assess the possibility of increasing the number of protected areas in the district.
- Full Text:
The role of psychosocial factors in academic performance of first year psychology students at a historically white university
- Authors: Dlamini, Sipho Solomon
- Date: 2017
- Subjects: Rhodes University -- Students , Academic achievement , Undergraduates -- South Africa , Dropouts -- South Africa , College students -- South Africa , Psychology students -- South Africa , Minorities -- Education -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/5150 , vital:20781
- Description: The success rate of students in higher education has been a cause for concern in South Africa (Letseka & Maile, 2008; Department of Higher Education and Training, 2015). This has been particularly concerning for first-year students, where the rate of attrition is especially high (Letseka, Cosser, Breier, and Visser, 2010). A number of factors have been identified in past research as having an effect on academic performance, which influences attrition and graduation. These factors include age (Justice, & Dornan, 2001), gender (Buchmann, & DiPrete, 2006), socio-economic status which is confounded by race (Letseka & Breier, 2008), type of educational background (Spreen, & Vally, 2006), and whether a student is a domestic or international student (Li, Chen, Duanmu, 2009), social capital (Young & Strelitz, 2014), whether the student is a first language speaker of the language of instruction at the university (Snowball, and Boughey, 2012), student wellbeing (Quinn, & Duckworth, 2007), locus of control (Findley, & Cooper, 1983), and frequency of lecture attendance (van Wallbeek, 2004). The study was conducted at Rhodes University, a small historically white South African institution. For this study, academic performance was measured using the participant’s midyear exam results for an introductory psychology cause, a course that straddles faculties. Of the 690 students registered for the course, 361 (52%) completed an electronic survey that explored the various factors associated with academic performance. A hierarchical regression analysis indicates that pre-university factors (age, gender, race, nationality, language, type of school, and socio-economic status) were the only significant predictors of academic performance, contributing 11% of the effect. Race and nationality, when all the other factors were controlled for, were the only predictors of academic performance. The implications of these findings pose troubling questions of the institutional culture at the university.
- Full Text:
- Authors: Dlamini, Sipho Solomon
- Date: 2017
- Subjects: Rhodes University -- Students , Academic achievement , Undergraduates -- South Africa , Dropouts -- South Africa , College students -- South Africa , Psychology students -- South Africa , Minorities -- Education -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/5150 , vital:20781
- Description: The success rate of students in higher education has been a cause for concern in South Africa (Letseka & Maile, 2008; Department of Higher Education and Training, 2015). This has been particularly concerning for first-year students, where the rate of attrition is especially high (Letseka, Cosser, Breier, and Visser, 2010). A number of factors have been identified in past research as having an effect on academic performance, which influences attrition and graduation. These factors include age (Justice, & Dornan, 2001), gender (Buchmann, & DiPrete, 2006), socio-economic status which is confounded by race (Letseka & Breier, 2008), type of educational background (Spreen, & Vally, 2006), and whether a student is a domestic or international student (Li, Chen, Duanmu, 2009), social capital (Young & Strelitz, 2014), whether the student is a first language speaker of the language of instruction at the university (Snowball, and Boughey, 2012), student wellbeing (Quinn, & Duckworth, 2007), locus of control (Findley, & Cooper, 1983), and frequency of lecture attendance (van Wallbeek, 2004). The study was conducted at Rhodes University, a small historically white South African institution. For this study, academic performance was measured using the participant’s midyear exam results for an introductory psychology cause, a course that straddles faculties. Of the 690 students registered for the course, 361 (52%) completed an electronic survey that explored the various factors associated with academic performance. A hierarchical regression analysis indicates that pre-university factors (age, gender, race, nationality, language, type of school, and socio-economic status) were the only significant predictors of academic performance, contributing 11% of the effect. Race and nationality, when all the other factors were controlled for, were the only predictors of academic performance. The implications of these findings pose troubling questions of the institutional culture at the university.
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The role of structural bioinformatics in drug discovery via computational SNP analysis–a proposed protocol for analyzing variation at the protein level:
- Brown, David K, Tastan Bishop, Özlem
- Authors: Brown, David K , Tastan Bishop, Özlem
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/162914 , vital:40996 , doi: 10.1016/j.gheart.2017.01.009
- Description: With the completion of the human genome project at the beginning of the 21st century, the biological sciences entered an unprecedented age of data generation, and made its first steps towards an era of personalized medicine. This abundance of sequence data has led to the proliferation of numerous sequence-based techniques for associating variation with disease, such as Genome-Wide Association Studies (GWAS) and Candidate Gene Association Studies (CGAS). However, these statistical methods do not provide an understanding of the functional effects of variation. Structure-based drug discovery and design is increasingly incorporating structural bioinformatics techniques to model and analyze protein targets, perform large scale virtual screening to identify hit to lead compounds, and simulate molecular interactions. These techniques are fast, cost-effective, and complement existing experimental techniques such as High Throughput Sequencing (HTS).
- Full Text:
- Authors: Brown, David K , Tastan Bishop, Özlem
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/162914 , vital:40996 , doi: 10.1016/j.gheart.2017.01.009
- Description: With the completion of the human genome project at the beginning of the 21st century, the biological sciences entered an unprecedented age of data generation, and made its first steps towards an era of personalized medicine. This abundance of sequence data has led to the proliferation of numerous sequence-based techniques for associating variation with disease, such as Genome-Wide Association Studies (GWAS) and Candidate Gene Association Studies (CGAS). However, these statistical methods do not provide an understanding of the functional effects of variation. Structure-based drug discovery and design is increasingly incorporating structural bioinformatics techniques to model and analyze protein targets, perform large scale virtual screening to identify hit to lead compounds, and simulate molecular interactions. These techniques are fast, cost-effective, and complement existing experimental techniques such as High Throughput Sequencing (HTS).
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The safety net function of NTFPs in different agro-ecological zones of South Africa
- Mugido, Worship, Shackleton, Charlie M
- Authors: Mugido, Worship , Shackleton, Charlie M
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/180111 , vital:43311 , xlink:href="https://doi.org/10.1007/s11111-017-0285-z"
- Description: Various South African studies have shown that rural households use NTFPs as safety nets in times of misfortune. However being focused on one or two sites, they do not show the prevalence of NTFP use as safety nets across multiple sites. In addition, they do not show the use of NTFPs as safety nets by rural households in different agro-ecological zones. The results of the study showed that about 79% of the total households interviewed experienced at least one shock of some magnitude in the previous 12 months. The most experienced shocks were illness, death, crop failure, and hunger. The households employed various coping strategies in response to different types of shocks, with the three widely used strategies being assistance from friends and relatives, using cash savings, and using NTFPs. Households in low agro-ecological zones used NTFPs as safety nets more than households in high agro-ecological zones.
- Full Text:
- Authors: Mugido, Worship , Shackleton, Charlie M
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/180111 , vital:43311 , xlink:href="https://doi.org/10.1007/s11111-017-0285-z"
- Description: Various South African studies have shown that rural households use NTFPs as safety nets in times of misfortune. However being focused on one or two sites, they do not show the prevalence of NTFP use as safety nets across multiple sites. In addition, they do not show the use of NTFPs as safety nets by rural households in different agro-ecological zones. The results of the study showed that about 79% of the total households interviewed experienced at least one shock of some magnitude in the previous 12 months. The most experienced shocks were illness, death, crop failure, and hunger. The households employed various coping strategies in response to different types of shocks, with the three widely used strategies being assistance from friends and relatives, using cash savings, and using NTFPs. Households in low agro-ecological zones used NTFPs as safety nets more than households in high agro-ecological zones.
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The sedimentology and depositional model of VS5 reef at Beatrix mine and surrounding areas of the Freestate Goldfield, South Africa
- Authors: Shivambu, Steven
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/4942 , vital:20745
- Description: Historically, placers of economic importance at Sibanye Gold's Beatrix No. 3 Shaft were Beatrix Reef, Aandenk Reef and Composite of the two reefs. Recently, the VS5 placer has emerged to be a significant contributor of ore tonnages mined on the Shaft as mining advances into deeper levels towards the northern portion of the mine lease area. Gold concentration in the VS5 Reef is highly variable from uneconomic, through marginal to economic gold values. A good knowledge of the sedimentological framework of the VS5 Reef was considered necessary in order to interpret the variable distribution of the gold within the VS5 placer. The aim of this study was to determine the depositional environments that played a major role during the formation of the VS5 placer by means of investigating the macroscopic sedimentological parameters of this particular reef. These sedimentological parameters were used as the basis for the subdivision of VS5 Reef into different facies recognized in the mine and surrounding areas. It was recognized that the VS5 placer was formed in a distal, braided fluvial environment by the reworking of the pre-existing Aandenk Reef by new materials containing significant amount of nondurable materials (see definition on page xii) such as shale detritus. Where there is no evidence of reworking of the older Aandenk Reef, the VS5 Reef occurs as poorly sorted, polymictic conglomerate with abundance of non-durable detritus. This is referred to as the Immature (IV) VS5 facies and occurs in the northern portion of the study area. The degree of reworking of the gravel bars by waves and current action resulted in the formation of well sorted, oligomictic conglomerates of the Beatrix facies in the southern portion of the mine. At the boundaries between the Immature VS5 and Beatrix facies occurs the Transitional (Sub-mature) VS5 facies, characterized by reef comprising a polymictic upper portion and a basal more mature oligomictic unit. The Transitional VS5 facies extends across the current central northern mining faces of Beatrix No. 3 Shaft with a northwest-southeast trend. There is a strong correlation between the VS5 lithofacies and distribution of gold mineralization. The Immature VS5 facies is poorly mineralized, with gold values averaging 200 c.m.g/t and lower. The Transitional (Sub-mature) VS5 facies has elevated gold values, ranging from 300 c.m.g/t to 1500 cm.g/t. Mineralization in this unit tend to be bottom loaded as well as at the base of each cyclic unit. The Beatrix facies records the highest grades averaging >1500 cmg/t. The improved understanding of the VS5 lithofacies made it possible to predict gold mineralization and aid planning to mine into viable VS5 areas.
- Full Text:
- Authors: Shivambu, Steven
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/4942 , vital:20745
- Description: Historically, placers of economic importance at Sibanye Gold's Beatrix No. 3 Shaft were Beatrix Reef, Aandenk Reef and Composite of the two reefs. Recently, the VS5 placer has emerged to be a significant contributor of ore tonnages mined on the Shaft as mining advances into deeper levels towards the northern portion of the mine lease area. Gold concentration in the VS5 Reef is highly variable from uneconomic, through marginal to economic gold values. A good knowledge of the sedimentological framework of the VS5 Reef was considered necessary in order to interpret the variable distribution of the gold within the VS5 placer. The aim of this study was to determine the depositional environments that played a major role during the formation of the VS5 placer by means of investigating the macroscopic sedimentological parameters of this particular reef. These sedimentological parameters were used as the basis for the subdivision of VS5 Reef into different facies recognized in the mine and surrounding areas. It was recognized that the VS5 placer was formed in a distal, braided fluvial environment by the reworking of the pre-existing Aandenk Reef by new materials containing significant amount of nondurable materials (see definition on page xii) such as shale detritus. Where there is no evidence of reworking of the older Aandenk Reef, the VS5 Reef occurs as poorly sorted, polymictic conglomerate with abundance of non-durable detritus. This is referred to as the Immature (IV) VS5 facies and occurs in the northern portion of the study area. The degree of reworking of the gravel bars by waves and current action resulted in the formation of well sorted, oligomictic conglomerates of the Beatrix facies in the southern portion of the mine. At the boundaries between the Immature VS5 and Beatrix facies occurs the Transitional (Sub-mature) VS5 facies, characterized by reef comprising a polymictic upper portion and a basal more mature oligomictic unit. The Transitional VS5 facies extends across the current central northern mining faces of Beatrix No. 3 Shaft with a northwest-southeast trend. There is a strong correlation between the VS5 lithofacies and distribution of gold mineralization. The Immature VS5 facies is poorly mineralized, with gold values averaging 200 c.m.g/t and lower. The Transitional (Sub-mature) VS5 facies has elevated gold values, ranging from 300 c.m.g/t to 1500 cm.g/t. Mineralization in this unit tend to be bottom loaded as well as at the base of each cyclic unit. The Beatrix facies records the highest grades averaging >1500 cmg/t. The improved understanding of the VS5 lithofacies made it possible to predict gold mineralization and aid planning to mine into viable VS5 areas.
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The socio-economic contribution of non-timber forest product trade to households in four villages in Zomba and Machinga Districts, Malawi
- Authors: Mahonya, Sophie Manchichi
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/4787 , vital:20724
- Description: The principal aim of this study was to assess the socio-economic contribution of nontimber forest product (NTFP) trade to households in Zomba and Machinga, southern Malawi. Quantitative and qualitative data were collected through several methods, including a household survey using questionnaire interviews, focus group discussions, key informant interviews with individual traders, direct observations, and literature review. The quantitative data were analysed statistically using SPPS version 16.0 while the qualitative data were analysed thematically. NTFP trade was the third important source of cash income for 15% of the households, although the level of use, buying and selling of NTFPs varied across the four study villages. All households in all the study villages used firewood (100%), and most used thatch grass (94%), bamboo (96%), wood for building (92%), largely as construction materials. However, the percentage of households buying NTFPs was lower, with the maximum percentage of households being 50%. The percent of households engaged in selling at least one NTFP was lower still at 39%. Substantial cash incomes were generated from firewood and edible orchids sales which provided up to a maximum of Mk180,000, equivalent to US$456, per year. Households joined the trade mostly for an alternative source of cash income due to poverty and to meet basic needs when other options were not available or feasible. Cash income generated from NTFP trade acted as a safety net and a coping strategy when other avenues supporting livelihoods were not accessible. The socio-economic benefits derived from NTFP trade were associated with the quantities collected, sold, market forces influenced by the law of demand and supply. The small amounts of cash income generated by most households were important as they supplemented household cash needs. There was a strong association between NTFP trade as one of the important sources of cash income and the number of months a household had food from their own garden in a year. There was a significant relationship though weak between ranking of NTFP trade and livestock ownership by households. Value chain analysis was used as an analytical tool to understand the processes involved in NTFP trade. The value chains for the products under study were short, dominated by traders and some intermediaries. Most of the products were sold in local markets with little value addition. This study recommends that policy makers should integrate NTFPs into their development plans, emphasizing the establishment of management strategies that will enhance availability and sustainability of the resource. NTFPs contributed to the livelihoods of the households socially and economically through provision of food, cash income, energy for cooking, medicine and construction materials.
- Full Text:
- Authors: Mahonya, Sophie Manchichi
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/4787 , vital:20724
- Description: The principal aim of this study was to assess the socio-economic contribution of nontimber forest product (NTFP) trade to households in Zomba and Machinga, southern Malawi. Quantitative and qualitative data were collected through several methods, including a household survey using questionnaire interviews, focus group discussions, key informant interviews with individual traders, direct observations, and literature review. The quantitative data were analysed statistically using SPPS version 16.0 while the qualitative data were analysed thematically. NTFP trade was the third important source of cash income for 15% of the households, although the level of use, buying and selling of NTFPs varied across the four study villages. All households in all the study villages used firewood (100%), and most used thatch grass (94%), bamboo (96%), wood for building (92%), largely as construction materials. However, the percentage of households buying NTFPs was lower, with the maximum percentage of households being 50%. The percent of households engaged in selling at least one NTFP was lower still at 39%. Substantial cash incomes were generated from firewood and edible orchids sales which provided up to a maximum of Mk180,000, equivalent to US$456, per year. Households joined the trade mostly for an alternative source of cash income due to poverty and to meet basic needs when other options were not available or feasible. Cash income generated from NTFP trade acted as a safety net and a coping strategy when other avenues supporting livelihoods were not accessible. The socio-economic benefits derived from NTFP trade were associated with the quantities collected, sold, market forces influenced by the law of demand and supply. The small amounts of cash income generated by most households were important as they supplemented household cash needs. There was a strong association between NTFP trade as one of the important sources of cash income and the number of months a household had food from their own garden in a year. There was a significant relationship though weak between ranking of NTFP trade and livestock ownership by households. Value chain analysis was used as an analytical tool to understand the processes involved in NTFP trade. The value chains for the products under study were short, dominated by traders and some intermediaries. Most of the products were sold in local markets with little value addition. This study recommends that policy makers should integrate NTFPs into their development plans, emphasizing the establishment of management strategies that will enhance availability and sustainability of the resource. NTFPs contributed to the livelihoods of the households socially and economically through provision of food, cash income, energy for cooking, medicine and construction materials.
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The South African tax implications of ceasing to be resident
- Authors: Walker, Anthony Howard
- Date: 2017
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/5555 , vital:20941
- Description: In the context of rapid globalisation, skilled South African employees and professionals are often attracted overseas to take up new work opportunities in foreign countries. This may cause these individuals no longer to be “ordinarily resident” in South Africa. At the same time, changes in modes of travel, information and communication channels could result in companies and trusts no longer being considered to be tax resident in South Africa, if the place of effective management for these entities is moved to a foreign country and a double taxation agreement between South Africa and that foreign country deems these entities to be exclusively resident in the foreign country. The objective of this thesis was to analyse the tax implications that could arise when a resident natural person, trust or company ceases to be a resident or when a Controlled Foreign Company (CFC) ceases to be a CFC. A detailed analysis of the “exit charge” in section 9H of the Income Tax Act was undertaken to understand its normal tax implications when a natural person, trust or company ceases to be a resident or a CFC ceases to be a CFC. This included an analysis of how a natural person, trust or company ceases to be resident or how a CFC ceases to be a CFC. It was found that certain normal tax principles consistently apply to when a natural person, trust or company ceases to be resident or a CFC ceases to be a CFC. At the same time, certain unique normal tax implications arise for trusts and CFCs since they are impacted by the special tax rules that apply to these entities. Furthermore in the case of a trust, a judicial precedent has established that the “exit charge” remains and is taxable in the trust. For CFCs, there is uncertainty as to whether the “exit charge” could arise when a shareholder ceases to be resident, which results in residents no longer holding more than 50% of the total participation or voting rights in that foreign company.
- Full Text:
- Authors: Walker, Anthony Howard
- Date: 2017
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/5555 , vital:20941
- Description: In the context of rapid globalisation, skilled South African employees and professionals are often attracted overseas to take up new work opportunities in foreign countries. This may cause these individuals no longer to be “ordinarily resident” in South Africa. At the same time, changes in modes of travel, information and communication channels could result in companies and trusts no longer being considered to be tax resident in South Africa, if the place of effective management for these entities is moved to a foreign country and a double taxation agreement between South Africa and that foreign country deems these entities to be exclusively resident in the foreign country. The objective of this thesis was to analyse the tax implications that could arise when a resident natural person, trust or company ceases to be a resident or when a Controlled Foreign Company (CFC) ceases to be a CFC. A detailed analysis of the “exit charge” in section 9H of the Income Tax Act was undertaken to understand its normal tax implications when a natural person, trust or company ceases to be a resident or a CFC ceases to be a CFC. This included an analysis of how a natural person, trust or company ceases to be resident or how a CFC ceases to be a CFC. It was found that certain normal tax principles consistently apply to when a natural person, trust or company ceases to be resident or a CFC ceases to be a CFC. At the same time, certain unique normal tax implications arise for trusts and CFCs since they are impacted by the special tax rules that apply to these entities. Furthermore in the case of a trust, a judicial precedent has established that the “exit charge” remains and is taxable in the trust. For CFCs, there is uncertainty as to whether the “exit charge” could arise when a shareholder ceases to be resident, which results in residents no longer holding more than 50% of the total participation or voting rights in that foreign company.
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The symbolic consumption and identity construction through luxury branded clothing among Rhodes University students
- Authors: Chinomona, Perpetua
- Date: 2017
- Subjects: Group identity , Peer pressure , Brand choice -- South Africa -- Makhanda , Consumer behavior -- South Africa -- Makhanda , Consumer behavior -- Psychological aspects -- South Africa -- Makhanda , Luxuries -- Psychological aspects -- South Africa -- Makhanda , Rhodes University -- Students -- Attitudes
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/6853 , vital:21193
- Description: The purpose of this study is to explore how Rhodes University (RU) students construct identity through the symbolic consumption of luxury branded clothing and the role played by reference groups in the consumption behaviour. The study employed the Social Identity Theory (SIT) as a theoretical framework which explains the underpinnings of the cognitions and behaviour with the use of group processes (Trepte, 2006). The central principle of SIT lies in individuals classifying themselves and others into in-group (reference groups) and out-group social categories respectively. There has been a gap in the literature pertaining to a full understanding of the identity construction process through symbolic consumption of luxury brands in South Africa (Reed, 2002). The significance of the study is to provide a foundation for an enhanced theory of consumer behaviour in this context. This study employed a qualitative research approach. A non-probability convenience sampling technique was used, and a total of 12 undergraduate and postgraduate students were interviewed. The chosen data collection method was semi-structured in-depth interviews and data were analysed using thematic analysis. The findings of the study revealed that participants consume luxury branded clothing for both functional and symbolic purposes. Various factors emerged that influence the choice of the symbolic consumption behaviour such as income, buying frequency, spending patterns, perceptions and habits around retail shopping and the shopping experience. In addition, results indicated that reference groups (celebrities, family and peers) play a significant role in the symbolic consumption and construction of identity among the participants. In addition, the results also indicated that the RU participants engaged in a ‘save to spend’ technique whereby they save their pocket money so that they spend it on their favourite luxury branded clothing when they leave for the holidays. There was a common reference group that emerged from the study, namely the peer in-group. The influence of reference groups on youth consumers in South Africa may assist with marketing strategies that can be employed when targeting the Generation Y. Additionally, results indicate that luxury branded clothing have an impact on identity construction within the South African context. The respondents tie their identity to their luxury branded clothing as an indication of ‘who they are’ and as an extension of the ‘self’.
- Full Text:
- Authors: Chinomona, Perpetua
- Date: 2017
- Subjects: Group identity , Peer pressure , Brand choice -- South Africa -- Makhanda , Consumer behavior -- South Africa -- Makhanda , Consumer behavior -- Psychological aspects -- South Africa -- Makhanda , Luxuries -- Psychological aspects -- South Africa -- Makhanda , Rhodes University -- Students -- Attitudes
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/6853 , vital:21193
- Description: The purpose of this study is to explore how Rhodes University (RU) students construct identity through the symbolic consumption of luxury branded clothing and the role played by reference groups in the consumption behaviour. The study employed the Social Identity Theory (SIT) as a theoretical framework which explains the underpinnings of the cognitions and behaviour with the use of group processes (Trepte, 2006). The central principle of SIT lies in individuals classifying themselves and others into in-group (reference groups) and out-group social categories respectively. There has been a gap in the literature pertaining to a full understanding of the identity construction process through symbolic consumption of luxury brands in South Africa (Reed, 2002). The significance of the study is to provide a foundation for an enhanced theory of consumer behaviour in this context. This study employed a qualitative research approach. A non-probability convenience sampling technique was used, and a total of 12 undergraduate and postgraduate students were interviewed. The chosen data collection method was semi-structured in-depth interviews and data were analysed using thematic analysis. The findings of the study revealed that participants consume luxury branded clothing for both functional and symbolic purposes. Various factors emerged that influence the choice of the symbolic consumption behaviour such as income, buying frequency, spending patterns, perceptions and habits around retail shopping and the shopping experience. In addition, results indicated that reference groups (celebrities, family and peers) play a significant role in the symbolic consumption and construction of identity among the participants. In addition, the results also indicated that the RU participants engaged in a ‘save to spend’ technique whereby they save their pocket money so that they spend it on their favourite luxury branded clothing when they leave for the holidays. There was a common reference group that emerged from the study, namely the peer in-group. The influence of reference groups on youth consumers in South Africa may assist with marketing strategies that can be employed when targeting the Generation Y. Additionally, results indicate that luxury branded clothing have an impact on identity construction within the South African context. The respondents tie their identity to their luxury branded clothing as an indication of ‘who they are’ and as an extension of the ‘self’.
- Full Text:
The tablet teacher: learning literacy through technology in Northern Sotho
- Authors: Shiohira, Kelly
- Date: 2017
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/7034 , vital:21211
- Description: This study evaluates the efficacy of the Bridges to the Future Initiative - South Africa 2 (BFI) tablet program on early literacy skills, as well as the ways in which learner-operated technology interacts with a traditional South African education system. The BFI is a curriculum-aligned early literacy development intervention implemented through technology in grades 2 and 3 in Northern Sotho1 first-language schools. A mixed-methods research design was utilized, involving three components: a literacy skills test administered through a time sequence trial design; a curriculum-aligned uptake and retention test using a pre-post design; and a qualitative research component including classroom observation, participant interviews and prompted drawings by learners. Paired sample t-tests show significantly higher gains during the treatment period in fluency and comprehension, and significantly higher gains in the control period in decoding individual words. It is theorized that this is due to teacher emphasis on emergent literacy. When initial ability is taken into consideration, all ability levels gain more on average during the treatment period in at least one measured skill. Regression analysis determines that time spent on the BFI program is not the most significant determiner of gains in the intervention period. Qualitative analysis supports this finding and suggests that program use cannot replace quality classroom practice in advancing literacy skills. Learners performed better after a delayed retention period than in an initial uptake test, indicating high rates of retention of knowledge gained through program use and traditional instruction, but inconsistent access to literacy skills gained.
- Full Text:
- Authors: Shiohira, Kelly
- Date: 2017
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/7034 , vital:21211
- Description: This study evaluates the efficacy of the Bridges to the Future Initiative - South Africa 2 (BFI) tablet program on early literacy skills, as well as the ways in which learner-operated technology interacts with a traditional South African education system. The BFI is a curriculum-aligned early literacy development intervention implemented through technology in grades 2 and 3 in Northern Sotho1 first-language schools. A mixed-methods research design was utilized, involving three components: a literacy skills test administered through a time sequence trial design; a curriculum-aligned uptake and retention test using a pre-post design; and a qualitative research component including classroom observation, participant interviews and prompted drawings by learners. Paired sample t-tests show significantly higher gains during the treatment period in fluency and comprehension, and significantly higher gains in the control period in decoding individual words. It is theorized that this is due to teacher emphasis on emergent literacy. When initial ability is taken into consideration, all ability levels gain more on average during the treatment period in at least one measured skill. Regression analysis determines that time spent on the BFI program is not the most significant determiner of gains in the intervention period. Qualitative analysis supports this finding and suggests that program use cannot replace quality classroom practice in advancing literacy skills. Learners performed better after a delayed retention period than in an initial uptake test, indicating high rates of retention of knowledge gained through program use and traditional instruction, but inconsistent access to literacy skills gained.
- Full Text:
The taxation of illegal income in South Africa: the basis on which proceeds from a unilateral taking should be taxed
- Authors: Nyakanyanga, Kudzai Talent
- Date: 2017
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/5960 , vital:21002
- Description: In South Africa, income tax is levied in terms of the Income Tax Act, 58 of 1962, and the calculation of a taxpayer’s taxable income and ultimately the tax liability commences with considering what constitutes the taxpayer’s gross income. In terms of the definition of “gross income” a person can be taxed either on receipts or accruals. The definition makes no reference, however, to the legality of receipts or accruals. The main issue addressed in this thesis is the interpretation of the term “receipt” in relation to the proceeds from a unilateral taking (theft) and whether the concept of a receipt in relation to theft should be interpreted using the subjective approach used in MP Finance Group CC (In Liquidation) v C:SARS, or the objective approach. An interpretative research approach was used to provide clarity on the matter. The documentary data used for the research consists of South African tax legislation, case law, textbooks and journal articles. The thesis also analysed SARS’ view in Interpretation Note 80 that MP Finance Group CC (In Liquidation) v C:SARS is authority for a unilateral taking being a receipt, and the correctness of this viewpoint. A brief comparative analysis was done of the basis on which illegal income flowing from a unilateral taking is taxed in Australia, New Zealand and America. These countries have legislative provisions that specifically deal with how the proceeds from theft in the hands of a thief should be treated for tax purposes. The thesis concludes that, although the court in MP Finance Group CC (In Liquidation) v C:SARS shed some light on the issue of the taxability of income from illegal activities, the basis on which proceeds from theft may be taxed, as opposed to the basis on which proceeds from other illegal activities like fraud are taxed, remains a grey area in our law. The thesis recommends the introduction of a legislative provision in order to provide a more unified, consistent and effective approach when taxing all illegal income.
- Full Text:
- Authors: Nyakanyanga, Kudzai Talent
- Date: 2017
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/5960 , vital:21002
- Description: In South Africa, income tax is levied in terms of the Income Tax Act, 58 of 1962, and the calculation of a taxpayer’s taxable income and ultimately the tax liability commences with considering what constitutes the taxpayer’s gross income. In terms of the definition of “gross income” a person can be taxed either on receipts or accruals. The definition makes no reference, however, to the legality of receipts or accruals. The main issue addressed in this thesis is the interpretation of the term “receipt” in relation to the proceeds from a unilateral taking (theft) and whether the concept of a receipt in relation to theft should be interpreted using the subjective approach used in MP Finance Group CC (In Liquidation) v C:SARS, or the objective approach. An interpretative research approach was used to provide clarity on the matter. The documentary data used for the research consists of South African tax legislation, case law, textbooks and journal articles. The thesis also analysed SARS’ view in Interpretation Note 80 that MP Finance Group CC (In Liquidation) v C:SARS is authority for a unilateral taking being a receipt, and the correctness of this viewpoint. A brief comparative analysis was done of the basis on which illegal income flowing from a unilateral taking is taxed in Australia, New Zealand and America. These countries have legislative provisions that specifically deal with how the proceeds from theft in the hands of a thief should be treated for tax purposes. The thesis concludes that, although the court in MP Finance Group CC (In Liquidation) v C:SARS shed some light on the issue of the taxability of income from illegal activities, the basis on which proceeds from theft may be taxed, as opposed to the basis on which proceeds from other illegal activities like fraud are taxed, remains a grey area in our law. The thesis recommends the introduction of a legislative provision in order to provide a more unified, consistent and effective approach when taxing all illegal income.
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The tectonic evolution of the Cape Fold Belt: constraints from fluid inclusion characteristics in syntectonic quartz veins
- Authors: Proctor, Briony
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/8019 , vital:21335
- Description: Syn-tectonic quartz veins formed along faults, folds and tension gashes in rocks of the Cape Supergroup (CSG) of the central Cape Fold Belt (CFB) comprise mainly hydrous saline fluids. These veins may also contain CO₂ Syn-tectonic quartz veins formed along faults, folds and tension gashes in rocks of the Cape Supergroup CO₂ , or CH4 and CO₂, or neither CO₂ nor CH4. The majority of inclusions are two-phase and fluid rich, and the most common fluid composition is H2O-NaCl. The final melting temperature, and therefore salinity, differs very little across different structures (fluids in all structures show maximum salinities between 2.5 and 6 wt% NaCl equivalent). Thrusts, reverse faults, strike- and oblique-slip faults, and folds all have similar homogenization temperatures (Th). Primary H2O-NaCl inclusions show Th between ~130 and 200 °C, and H2O-NaCl-CO₂ inclusions have slightly higher Th, between ~140 and 240 °C. Secondary inclusions in all structures have a similar Th range to primary inclusions, but have a lower maximum Th (~130-180 °C). Inclusions containing CH4 have the highest Th (~210 - 300 °C). Microthermobarometry indicates that fluids associated with contractional structures, such as thrust faults or folds, from the Ordovician lower Table Mountain Group (TMG) show lower greenschist facies trapping conditions (~170-175 MPa and ~240-300 °C). These veins also show a plastic deformation overprint (recrystallization of quartz and foam textures), at temperatures higher than the trapping conditions (~ ≥300 °C), indicating that temperatures increased subsequent to hydraulic fracturing, quartz precipitation and thrust slip. These structures formed on a prograde path, at approximately 335 Ma, at a time when the overlying CSG rock column was approximately 6800 m thick. This event pre-dated the thermal peak of the Cape Orogeny at ~276-261 Ma by ~60 million years. Further up in the stratigraphy of the CFB, in the Devonian upper Bokkeveld Group, fluid inclusions in quartz veins associated with a thrust fault show similar trapping pressure (~200 MPa) to the structures in the lower CFB. At 335 Ma, the stratigraphic overburden on this sample locality would not have been sufficiently thick to exert the calculated pressure. This fault may have formed at a later time. The observed pressure of ~200 MPa may have been created either by the higher Bokkeveld Group, the entire Witteberg Group, and further CSG rocks that were eroded prior to the deposition of the Permo-Triassic Karoo Supergroup, or by tectonic thickening of the CSG by prograde thrusting. Still further up in the CSG, fluids from a fold sample from the Witteberg Group record quartz precipitation at lower greenschist facies conditions and subsequent plastic deformation during folding. The formation of this fold postdates the thrusting in the lower TMG, and may correlate in time with deformation during the thermal peak in Middle Permian time (~276-261 Ma).
- Full Text:
- Authors: Proctor, Briony
- Date: 2017
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/8019 , vital:21335
- Description: Syn-tectonic quartz veins formed along faults, folds and tension gashes in rocks of the Cape Supergroup (CSG) of the central Cape Fold Belt (CFB) comprise mainly hydrous saline fluids. These veins may also contain CO₂ Syn-tectonic quartz veins formed along faults, folds and tension gashes in rocks of the Cape Supergroup CO₂ , or CH4 and CO₂, or neither CO₂ nor CH4. The majority of inclusions are two-phase and fluid rich, and the most common fluid composition is H2O-NaCl. The final melting temperature, and therefore salinity, differs very little across different structures (fluids in all structures show maximum salinities between 2.5 and 6 wt% NaCl equivalent). Thrusts, reverse faults, strike- and oblique-slip faults, and folds all have similar homogenization temperatures (Th). Primary H2O-NaCl inclusions show Th between ~130 and 200 °C, and H2O-NaCl-CO₂ inclusions have slightly higher Th, between ~140 and 240 °C. Secondary inclusions in all structures have a similar Th range to primary inclusions, but have a lower maximum Th (~130-180 °C). Inclusions containing CH4 have the highest Th (~210 - 300 °C). Microthermobarometry indicates that fluids associated with contractional structures, such as thrust faults or folds, from the Ordovician lower Table Mountain Group (TMG) show lower greenschist facies trapping conditions (~170-175 MPa and ~240-300 °C). These veins also show a plastic deformation overprint (recrystallization of quartz and foam textures), at temperatures higher than the trapping conditions (~ ≥300 °C), indicating that temperatures increased subsequent to hydraulic fracturing, quartz precipitation and thrust slip. These structures formed on a prograde path, at approximately 335 Ma, at a time when the overlying CSG rock column was approximately 6800 m thick. This event pre-dated the thermal peak of the Cape Orogeny at ~276-261 Ma by ~60 million years. Further up in the stratigraphy of the CFB, in the Devonian upper Bokkeveld Group, fluid inclusions in quartz veins associated with a thrust fault show similar trapping pressure (~200 MPa) to the structures in the lower CFB. At 335 Ma, the stratigraphic overburden on this sample locality would not have been sufficiently thick to exert the calculated pressure. This fault may have formed at a later time. The observed pressure of ~200 MPa may have been created either by the higher Bokkeveld Group, the entire Witteberg Group, and further CSG rocks that were eroded prior to the deposition of the Permo-Triassic Karoo Supergroup, or by tectonic thickening of the CSG by prograde thrusting. Still further up in the CSG, fluids from a fold sample from the Witteberg Group record quartz precipitation at lower greenschist facies conditions and subsequent plastic deformation during folding. The formation of this fold postdates the thrusting in the lower TMG, and may correlate in time with deformation during the thermal peak in Middle Permian time (~276-261 Ma).
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The temporal occurrence of flesh flies (Diptera, Sarcophagidae) at carrion-baited traps in Grahamstown, South Africa
- Villet, Martin H, Clitheroe, Crystal-Leigh, Williams, Kirstin A
- Authors: Villet, Martin H , Clitheroe, Crystal-Leigh , Williams, Kirstin A
- Date: 2017
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59692 , vital:27639 , https://doi.org/10.3897/AfrInvertebr.58.9537
- Description: Eleven species of flesh fly were identified in a sample of 737 specimens captured during fortnightly trapping at three sites in Grahamstown, South Africa, over a year. Sarcophaga africa Wiedemann, 1824, S. inaequalis Austen, 1909, S. exuberans Pandelle, 1896 and S. tibialis Macquart, 1851 showed well-defined peaks between early October 2001 and late April 2002, and only S. africa was trapped at other times of year. These peaks occurred when average minimum and maximum ambient air temperatures were above 12°C and 22°C, respectively, and showed no obvious relationship to rainfall. There were indications of population cycles in all of these species. Sarcophaga hera Zumpt, 1972, S. arno Curran, 1934, S. inzi Curran, 1934, S. langi Curran, 1934, S. freyi Zumpt, 1953, S. nodosa Engel, 1925 and S. samia Curran, 1934 were too scarce to assess their patterns of occurrence rigorously. Insects attending a corpse are reputed to assist forensic entomologists in estimating the time of year when the body died. Some flesh flies provide more precise estimates than others, so several species should be used for cross-validation. Insect activity at a corpse depends on the weather, so that presence of a species indicates particular environmental conditions and not simply calendar dates (particularly if climate changes). Absence of a species is not necessarily evidence of specific conditions because species may not be present at all sites simultaneously, populations cycle even when their members are active, and low population densities may hamper detection of a species.
- Full Text:
- Authors: Villet, Martin H , Clitheroe, Crystal-Leigh , Williams, Kirstin A
- Date: 2017
- Language: English
- Type: article , text
- Identifier: http://hdl.handle.net/10962/59692 , vital:27639 , https://doi.org/10.3897/AfrInvertebr.58.9537
- Description: Eleven species of flesh fly were identified in a sample of 737 specimens captured during fortnightly trapping at three sites in Grahamstown, South Africa, over a year. Sarcophaga africa Wiedemann, 1824, S. inaequalis Austen, 1909, S. exuberans Pandelle, 1896 and S. tibialis Macquart, 1851 showed well-defined peaks between early October 2001 and late April 2002, and only S. africa was trapped at other times of year. These peaks occurred when average minimum and maximum ambient air temperatures were above 12°C and 22°C, respectively, and showed no obvious relationship to rainfall. There were indications of population cycles in all of these species. Sarcophaga hera Zumpt, 1972, S. arno Curran, 1934, S. inzi Curran, 1934, S. langi Curran, 1934, S. freyi Zumpt, 1953, S. nodosa Engel, 1925 and S. samia Curran, 1934 were too scarce to assess their patterns of occurrence rigorously. Insects attending a corpse are reputed to assist forensic entomologists in estimating the time of year when the body died. Some flesh flies provide more precise estimates than others, so several species should be used for cross-validation. Insect activity at a corpse depends on the weather, so that presence of a species indicates particular environmental conditions and not simply calendar dates (particularly if climate changes). Absence of a species is not necessarily evidence of specific conditions because species may not be present at all sites simultaneously, populations cycle even when their members are active, and low population densities may hamper detection of a species.
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The thin edge of the wedge: ukuthwala, alienation and consent
- Mwambene, Lea, Kruuse, Helen
- Authors: Mwambene, Lea , Kruuse, Helen
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/129165 , vital:36226 , https://doi.org/10.1080/02587203.2017.1303902
- Description: Ukuthwala, a mock abduction of a girl for the purpose of a customary marriage, has been subject to debate at both local and national level. This debate culminated into a South African Law Reform Commission Report on the practice of ukuthwala. However, the case of Jezile v S brings theory into reality, putting in stark relief the issues that surround this custom in a constitutional democracy. The Jezile case highlights the disjuncture between communities’ lived realities and the constitutional imperatives of the right to practice one’s culture, as well as the rights to equality and dignity, specifically for women and the girl child in the context of ukuthwala. Based on field research conducted in September 2015 and April 2016 in Engcobo (where the ukuthwala was alleged to take place in Jezile), this article sets out the community’s views in the aftermath of the case. Highlighting the alienation of the community from the law, and the complexities in understanding consent, the article posits that much more needs to be done from the ‘bottom up’ to ensure gender equality and protection of the girl child from harm.
- Full Text:
- Authors: Mwambene, Lea , Kruuse, Helen
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/129165 , vital:36226 , https://doi.org/10.1080/02587203.2017.1303902
- Description: Ukuthwala, a mock abduction of a girl for the purpose of a customary marriage, has been subject to debate at both local and national level. This debate culminated into a South African Law Reform Commission Report on the practice of ukuthwala. However, the case of Jezile v S brings theory into reality, putting in stark relief the issues that surround this custom in a constitutional democracy. The Jezile case highlights the disjuncture between communities’ lived realities and the constitutional imperatives of the right to practice one’s culture, as well as the rights to equality and dignity, specifically for women and the girl child in the context of ukuthwala. Based on field research conducted in September 2015 and April 2016 in Engcobo (where the ukuthwala was alleged to take place in Jezile), this article sets out the community’s views in the aftermath of the case. Highlighting the alienation of the community from the law, and the complexities in understanding consent, the article posits that much more needs to be done from the ‘bottom up’ to ensure gender equality and protection of the girl child from harm.
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The Uptake of Education for Sustainable Development in Geography Curricula in South African Secondary Schools
- Authors: Dube, Carolina
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/436319 , vital:73257 , ISBN 978-3-319-45989-9 , https://doi.org/10.1007/978-3-319-45989-9_7
- Description: Curriculum innovation that took place in the post-apartheid era in South Africa provided opportunities for integrating environ-mental concerns and sustainability issues in subjects such as geography and science at further education and training level (FET). However, evidence from my PhD study in geography education at FET level shows that there are major challenges in the implementation of education for sustainable develop-ment (ESD) in the school context. These relate, firstly, to teachers’ lack of content knowledge (CK) and pedagogical content knowledge (PCK) and, secondly, to contextual issues and structural constraints within schools. In order to overcome some of the challenges, a standards-based teacher training model is recommended to ensure the mastery of appropriate competencies for the implementation of environmental educa-tion (EE) and ESD.
- Full Text:
- Authors: Dube, Carolina
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , book chapter
- Identifier: http://hdl.handle.net/10962/436319 , vital:73257 , ISBN 978-3-319-45989-9 , https://doi.org/10.1007/978-3-319-45989-9_7
- Description: Curriculum innovation that took place in the post-apartheid era in South Africa provided opportunities for integrating environ-mental concerns and sustainability issues in subjects such as geography and science at further education and training level (FET). However, evidence from my PhD study in geography education at FET level shows that there are major challenges in the implementation of education for sustainable develop-ment (ESD) in the school context. These relate, firstly, to teachers’ lack of content knowledge (CK) and pedagogical content knowledge (PCK) and, secondly, to contextual issues and structural constraints within schools. In order to overcome some of the challenges, a standards-based teacher training model is recommended to ensure the mastery of appropriate competencies for the implementation of environmental educa-tion (EE) and ESD.
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The use of an analogy in conjunction with a conventional practical activity to mediate Grade 11 learners’ sense making of Ohm’s law
- Authors: Ramasike, Lineo Florence
- Date: 2017
- Subjects: Physical sciences -- Study and teaching (Secondary) -- South Africa Ohm's law Academic achievement
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/4558 , vital:20689
- Description: In most South African schools Grade 12 Physical Sciences learners are generally not performing well. As Examiners’ Reports reveal, they are particularly weak on the topic of electrical circuits. Because of this, the Examiners recommended that conventional practical activities and revision should be implemented to improve learners’ performance whilst they are in Grade 11. These factors contributed to the rationale of this study in using the ‘straw electricity’ analogy in conjunction with a conventional practical activity to mediate learners’ sense making of Ohm’s law. The study falls within the interpretive paradigm, whose focus is on the understanding of human world-views. Within the interpretive paradigm a qualitative case study approach was employed. It is a case study because it aimed to investigate a group of learners in a given context. This qualitative case study used purposive sampling to select participants. Various data gathering techniques were employed, namely, documents, observations and stimulated recall interviews. The gathered data was analysed so as to determine the indicators of how learners made sense of Ohm’s law. The findings of this study are that learners were able to construct new knowledge within a social context where the ‘straw electricity’ analogy, using easily accessible resources, was incorporated in tandem with a conventional practical classroom task. Moreover, the ‘straw electricity’ analogy enabled a better understanding of science concepts as it tested and supported different learning skills.
- Full Text:
- Authors: Ramasike, Lineo Florence
- Date: 2017
- Subjects: Physical sciences -- Study and teaching (Secondary) -- South Africa Ohm's law Academic achievement
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/4558 , vital:20689
- Description: In most South African schools Grade 12 Physical Sciences learners are generally not performing well. As Examiners’ Reports reveal, they are particularly weak on the topic of electrical circuits. Because of this, the Examiners recommended that conventional practical activities and revision should be implemented to improve learners’ performance whilst they are in Grade 11. These factors contributed to the rationale of this study in using the ‘straw electricity’ analogy in conjunction with a conventional practical activity to mediate learners’ sense making of Ohm’s law. The study falls within the interpretive paradigm, whose focus is on the understanding of human world-views. Within the interpretive paradigm a qualitative case study approach was employed. It is a case study because it aimed to investigate a group of learners in a given context. This qualitative case study used purposive sampling to select participants. Various data gathering techniques were employed, namely, documents, observations and stimulated recall interviews. The gathered data was analysed so as to determine the indicators of how learners made sense of Ohm’s law. The findings of this study are that learners were able to construct new knowledge within a social context where the ‘straw electricity’ analogy, using easily accessible resources, was incorporated in tandem with a conventional practical classroom task. Moreover, the ‘straw electricity’ analogy enabled a better understanding of science concepts as it tested and supported different learning skills.
- Full Text:
The use of experimental design for the development of a capillary zone electrophoresis method for the quantitation of captopril
- Mukozhiwa, S Y, Khamanga, Sandile M, Walker, Roderick B
- Authors: Mukozhiwa, S Y , Khamanga, Sandile M , Walker, Roderick B
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183828 , vital:44073 , xlink:href="https://doi.org/10.1691/ph.2017.7071"
- Description: A capillary zone electrophoresis (CZE) method for the quantitation of captopril (CPT) using UV detection was developed. Influence of electrolyte concentration and system variables on electrophoretic separation was evaluated and a central composite design (CCD) was used to optimize the method. Variables investigated were pH, molarity, applied voltage and capillary length. The influence of sodium metabisulphite on the stability of test solutions was also investigated. The use of sodium metabisulphite prevented degradation of CPT over 24 hours. A fused uncoated silica capillary of 67.5cm total and 57.5 cm effective length was used for analysis. The applied voltage and capillary length affected the migration time of CPT significantly. A 20 mM phosphate buffer adjusted to pH 7.0 was used as running buffer and an applied voltage of 23.90 kV was suitable to effect a separation. The optimized electrophoretic conditions produced sharp, well-resolved peaks for CPT and sodium metabisulphite. Linear regression analysis of the response for CPT standards revealed the method was linear (R2 = 0.9995) over the range 5-70 μg/mL. The limits of quantitation and detection were 5 and 1.5 μg/mL. A simple, rapid and reliable CZE method has been developed and successfully applied to the analysis of commercially available CPT products.
- Full Text:
- Authors: Mukozhiwa, S Y , Khamanga, Sandile M , Walker, Roderick B
- Date: 2017
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/183828 , vital:44073 , xlink:href="https://doi.org/10.1691/ph.2017.7071"
- Description: A capillary zone electrophoresis (CZE) method for the quantitation of captopril (CPT) using UV detection was developed. Influence of electrolyte concentration and system variables on electrophoretic separation was evaluated and a central composite design (CCD) was used to optimize the method. Variables investigated were pH, molarity, applied voltage and capillary length. The influence of sodium metabisulphite on the stability of test solutions was also investigated. The use of sodium metabisulphite prevented degradation of CPT over 24 hours. A fused uncoated silica capillary of 67.5cm total and 57.5 cm effective length was used for analysis. The applied voltage and capillary length affected the migration time of CPT significantly. A 20 mM phosphate buffer adjusted to pH 7.0 was used as running buffer and an applied voltage of 23.90 kV was suitable to effect a separation. The optimized electrophoretic conditions produced sharp, well-resolved peaks for CPT and sodium metabisulphite. Linear regression analysis of the response for CPT standards revealed the method was linear (R2 = 0.9995) over the range 5-70 μg/mL. The limits of quantitation and detection were 5 and 1.5 μg/mL. A simple, rapid and reliable CZE method has been developed and successfully applied to the analysis of commercially available CPT products.
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The ‘decolonial turn’: what does it mean for academic staff development?
- Vorster, Jo-Anne, Quinn, Lynn
- Authors: Vorster, Jo-Anne , Quinn, Lynn
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/66612 , vital:28971 , https://doi.org/10.17159/1947-9417/2017/853
- Description: publisher version , It has become increasingly evident that the discourse of transformation that has shaped the democratising of higher education institutions over the first two decades of the democratic dispensation in South Africa has now run its course. Over the past few years, and particularly during the tumultuous student protests of 2015 and 2016, students and some academics have been calling for the decolonisation of university structures and cultures, including curricula. Using concepts from Margaret Archer’s social realism we consider the failure of the discourse of transformation to lead to real change and examine a constellation of new discourses related to the decolonisation of universities that have emerged in South Africa recently. Furthermore, we critique the discourses that have underpinned our own practices as academic developers over the past two decades and then explore the implications of what could be termed a ‘decolonial turn’ 1 for academic developers and by implication for the academics with whom they work.
- Full Text:
- Authors: Vorster, Jo-Anne , Quinn, Lynn
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/66612 , vital:28971 , https://doi.org/10.17159/1947-9417/2017/853
- Description: publisher version , It has become increasingly evident that the discourse of transformation that has shaped the democratising of higher education institutions over the first two decades of the democratic dispensation in South Africa has now run its course. Over the past few years, and particularly during the tumultuous student protests of 2015 and 2016, students and some academics have been calling for the decolonisation of university structures and cultures, including curricula. Using concepts from Margaret Archer’s social realism we consider the failure of the discourse of transformation to lead to real change and examine a constellation of new discourses related to the decolonisation of universities that have emerged in South Africa recently. Furthermore, we critique the discourses that have underpinned our own practices as academic developers over the past two decades and then explore the implications of what could be termed a ‘decolonial turn’ 1 for academic developers and by implication for the academics with whom they work.
- Full Text:
Thermally-assisted optically stimulated luminescence from deep electron traps in α-Al2O3: C, Mg
- Kalita, Jitumani M, Chithambo, Makaiko L, Polymeris, G S
- Authors: Kalita, Jitumani M , Chithambo, Makaiko L , Polymeris, G S
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/116133 , vital:34322 , https://doi.org/10.1016/j.nimb.2017.04.075
- Description: We report thermally-assisted optically stimulated luminescence (TA-OSL) in α-Al2O3:C,Mg. The OSL was measured at elevated temperatures between 50 and 240 °C from a sample preheated to 500 °C after irradiation to 100 Gy. That OSL could be measured even after the preheating is direct evidence of the existence of deep electron traps in α-Al2O3:C,Mg. The TA-OSL intensity goes through a peak with measurement temperature. The initial increase is ascribed to thermal assistance to optical stimulation whereas the subsequent decrease in intensity is deduced to reflect increasing incidences of non-radiative recombination, that is, thermal quenching. The activation energy for thermal assistance corresponding to a deep electron trap was estimated as 0.667 ± 0.006 eV whereas the activation energy for thermal quenching was calculated as 0.90 ± 0.04 eV. The intensity of the TA-OSL was also found to increase with irradiation dose. The dose response is sublinear from 25 to 150 Gy but saturates with further increase of dose. The TA-OSL dose response has been discussed by considering the competition for charges at the deep traps. This study incidentally shows that TA-OSL can be effectively used in dosimetry involving large doses.
- Full Text: false
- Authors: Kalita, Jitumani M , Chithambo, Makaiko L , Polymeris, G S
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/116133 , vital:34322 , https://doi.org/10.1016/j.nimb.2017.04.075
- Description: We report thermally-assisted optically stimulated luminescence (TA-OSL) in α-Al2O3:C,Mg. The OSL was measured at elevated temperatures between 50 and 240 °C from a sample preheated to 500 °C after irradiation to 100 Gy. That OSL could be measured even after the preheating is direct evidence of the existence of deep electron traps in α-Al2O3:C,Mg. The TA-OSL intensity goes through a peak with measurement temperature. The initial increase is ascribed to thermal assistance to optical stimulation whereas the subsequent decrease in intensity is deduced to reflect increasing incidences of non-radiative recombination, that is, thermal quenching. The activation energy for thermal assistance corresponding to a deep electron trap was estimated as 0.667 ± 0.006 eV whereas the activation energy for thermal quenching was calculated as 0.90 ± 0.04 eV. The intensity of the TA-OSL was also found to increase with irradiation dose. The dose response is sublinear from 25 to 150 Gy but saturates with further increase of dose. The TA-OSL dose response has been discussed by considering the competition for charges at the deep traps. This study incidentally shows that TA-OSL can be effectively used in dosimetry involving large doses.
- Full Text: false
Thermoluminescence of K-Mg-Al-Zn fluorophosphate glass
- Thomas, Sunil, Chithambo, Makaiko L
- Authors: Thomas, Sunil , Chithambo, Makaiko L
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124188 , vital:35574 , https://doi.org/10.1016/j.optmat.2016.12.035
- Description: The thermoluminescence of beta irradiated K-Mg-Al-Zn fluorophosphate glass is reported. A glow-curve corresponding to 10 Gy measured at 1 °C/s shows two peaks, a weaker-intensity one at 70 °C and a more prominent one at 235 °C, the subject of this report. The main peak was observed to fade with delay between irradiation and measurement and specifically, by 11% in 15 h. Its dose response is superlinear in the dose range 1–190 Gy although the change was linear for the initial 10 Gy. Regarding kinetic analysis, the activation energy of the higher temperature peak was evaluated as 1.31 eV and that of the lower temperature peak was found as 0.47 eV. It was also noted that the main peak is affected by thermal quenching with an activation energy for thermal quenching equal to 1.37 eV. It is proposed that the mechanism associated with the thermoluminescence in K-Mg-Al-Zn fluorophosphate glass is that electrons trapped by the metal cations are released during heating and then recombine with holes at oxygen sites.
- Full Text: false
- Authors: Thomas, Sunil , Chithambo, Makaiko L
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124188 , vital:35574 , https://doi.org/10.1016/j.optmat.2016.12.035
- Description: The thermoluminescence of beta irradiated K-Mg-Al-Zn fluorophosphate glass is reported. A glow-curve corresponding to 10 Gy measured at 1 °C/s shows two peaks, a weaker-intensity one at 70 °C and a more prominent one at 235 °C, the subject of this report. The main peak was observed to fade with delay between irradiation and measurement and specifically, by 11% in 15 h. Its dose response is superlinear in the dose range 1–190 Gy although the change was linear for the initial 10 Gy. Regarding kinetic analysis, the activation energy of the higher temperature peak was evaluated as 1.31 eV and that of the lower temperature peak was found as 0.47 eV. It was also noted that the main peak is affected by thermal quenching with an activation energy for thermal quenching equal to 1.37 eV. It is proposed that the mechanism associated with the thermoluminescence in K-Mg-Al-Zn fluorophosphate glass is that electrons trapped by the metal cations are released during heating and then recombine with holes at oxygen sites.
- Full Text: false
Thermoluminescence of SrAl2O4: Eu2+, Dy3+: kinetic analysis of a composite-peak
- Chithambo, Makaiko L, Wako, A H, Finch, A A
- Authors: Chithambo, Makaiko L , Wako, A H , Finch, A A
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124157 , vital:35571 , https://doi.org/10.1016/j.radmeas.2016.12.009
- Description: The kinetic analysis of thermoluminescence of beta-irradiated SrAl2O4:Eu2+,Dy3+ is reported. The glow-curve is dominated by an apparently-single peak. It has been demonstrated using a number of tests including partial dynamic-heating, isothermal heating, phosphorescence and, the effect of fading, that the peak and the glow-curve consists of a set of closely-spaced peaks. In view of the peak being complex, its first few components were abstracted and analysed and for comparison, the peak was also analysed assuming it is genuinely single.
- Full Text: false
- Authors: Chithambo, Makaiko L , Wako, A H , Finch, A A
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124157 , vital:35571 , https://doi.org/10.1016/j.radmeas.2016.12.009
- Description: The kinetic analysis of thermoluminescence of beta-irradiated SrAl2O4:Eu2+,Dy3+ is reported. The glow-curve is dominated by an apparently-single peak. It has been demonstrated using a number of tests including partial dynamic-heating, isothermal heating, phosphorescence and, the effect of fading, that the peak and the glow-curve consists of a set of closely-spaced peaks. In view of the peak being complex, its first few components were abstracted and analysed and for comparison, the peak was also analysed assuming it is genuinely single.
- Full Text: false