An assessment of the Kenyan coastal artisanal fishery and implications for the introduction of fish aggregation devices
- Authors: Mbaru, Emmanuel Kakunde
- Date: 2013 , 2013-07-30
- Subjects: Fisheries -- Kenya , Fishery management -- Kenya , Fish aggregation devices , Small-scale fisheries -- Kenya , Small-scale fisheries -- Economic aspects -- Kenya
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5341 , http://hdl.handle.net/10962/d1006055 , Fisheries -- Kenya , Fishery management -- Kenya , Fish aggregation devices , Small-scale fisheries -- Kenya , Small-scale fisheries -- Economic aspects -- Kenya
- Description: The marine fishery in Kenya is predominantly small-scale and artisanal with about 11,000 fishers intensely fishing near shore coastal reefs using minimally selective fishing gears. A large majority (88%) of fishers use outdated equipment such as basket traps, beach seines, hand lines (hook and lines), fence traps, gillnets, spearguns and cast nets. Handmade canoes propelled by paddles (kasia) or sail power are used to access offshore waters, while only a few fishers have motorized boats. Although fishers along this coast know and express the potential of offshore fishing, most of them are disempowered and unable to access any of the largely untapped offshore pelagic resources. Using a unique dataset from four distinct coastal areas: Funzi-Shirazi bay area, Diani-Chale area, Mombasa-Kilifi north coast area and the Malindi-Ungwana bay area, containing species level length frequency catch data from the multi-gear and multi-species fishery, abundance of specific species, gear use comparisons in various regions, catch per unit effort and total catch estimate over a nine year period (2001 – 2009) were evaluated. Despite high diversity in the fishery, five species (Lethrinus lentjan, Siganus sutor, Leptoscarus vaigiensis, Lethrinus harak and Parupeneus macronemus) represented over 75% of the catch. A total of 11 legitimate gears were observed in this coastal artisanal fishery with basket traps (42%) being the most popular. Fishers along the Mombasa-Kilifi area predominatly used beach seines while those in Diani-Chale, Malindi-Ungwana bay and Funzi-shirazi bay predominaltly used spearguns, gillnets and basket traps, respectively. Apart from gillnets, a general declining trend for most of the gear types was observed since 2004. Beach seines recorded the lowest (20.9±0.2 cm) mean length while gillnets recorded the highest (34.2±0.3 cm). The highest catch (~26,000 metric tons) came in 2001 and the lowest (~15,000 metric tons) in 2005. The highest number of fishers was observed in 2008 while 2009 recorded the highest (4.8±2.3) mean number of hours per outing. The mean annual CPUE per region ranged from (1.5 kg.fisher-1.hr-1) in Diani-Chale to (1.0 kg.fisher-1.hr-1) in Malindi-Ungwana bay. Making use of questionnaire data, the attitudes towards offshore fishing strategies, FADs in particular, were evaluated. Some communities (about 25% in every location) were not even aware of FAD fisheries. With the imminent introduction of a FAD fishery in Kenya, it was concluded that, for this fishery to realize its full potential, training on FAD fishing techniques has to be done. Finally, effective management is necessary if small-scale fisheries are to continue providing food security for many poor coastal communities. Gear-based management in Kenya, although under represented and under studied, has the potential to be adaptive, address multiple objectives, and be crafted to the socio-economic setting. Management effectiveness in near shore fisheries has generally been evaluated at the scale of the fish community. However, community level indicators can mask species-specific declines that provide significant portions of the fisheries yields and income. This thesis seeks to identify ways in which the Kenyan artisanal fishery can be sustained and managed from within coastal communities, giving them the resources and education to effectively improve their lives. The introduction of a offshore FAD fishery and hence access to offshore pelagic species provides an opportunity to not only alleviate pressure on coastal resources but also to empower coastal communities and contribute to the growth of Kenya’s national economy as a whole.
- Full Text:
- Date Issued: 2013
- Authors: Mbaru, Emmanuel Kakunde
- Date: 2013 , 2013-07-30
- Subjects: Fisheries -- Kenya , Fishery management -- Kenya , Fish aggregation devices , Small-scale fisheries -- Kenya , Small-scale fisheries -- Economic aspects -- Kenya
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5341 , http://hdl.handle.net/10962/d1006055 , Fisheries -- Kenya , Fishery management -- Kenya , Fish aggregation devices , Small-scale fisheries -- Kenya , Small-scale fisheries -- Economic aspects -- Kenya
- Description: The marine fishery in Kenya is predominantly small-scale and artisanal with about 11,000 fishers intensely fishing near shore coastal reefs using minimally selective fishing gears. A large majority (88%) of fishers use outdated equipment such as basket traps, beach seines, hand lines (hook and lines), fence traps, gillnets, spearguns and cast nets. Handmade canoes propelled by paddles (kasia) or sail power are used to access offshore waters, while only a few fishers have motorized boats. Although fishers along this coast know and express the potential of offshore fishing, most of them are disempowered and unable to access any of the largely untapped offshore pelagic resources. Using a unique dataset from four distinct coastal areas: Funzi-Shirazi bay area, Diani-Chale area, Mombasa-Kilifi north coast area and the Malindi-Ungwana bay area, containing species level length frequency catch data from the multi-gear and multi-species fishery, abundance of specific species, gear use comparisons in various regions, catch per unit effort and total catch estimate over a nine year period (2001 – 2009) were evaluated. Despite high diversity in the fishery, five species (Lethrinus lentjan, Siganus sutor, Leptoscarus vaigiensis, Lethrinus harak and Parupeneus macronemus) represented over 75% of the catch. A total of 11 legitimate gears were observed in this coastal artisanal fishery with basket traps (42%) being the most popular. Fishers along the Mombasa-Kilifi area predominatly used beach seines while those in Diani-Chale, Malindi-Ungwana bay and Funzi-shirazi bay predominaltly used spearguns, gillnets and basket traps, respectively. Apart from gillnets, a general declining trend for most of the gear types was observed since 2004. Beach seines recorded the lowest (20.9±0.2 cm) mean length while gillnets recorded the highest (34.2±0.3 cm). The highest catch (~26,000 metric tons) came in 2001 and the lowest (~15,000 metric tons) in 2005. The highest number of fishers was observed in 2008 while 2009 recorded the highest (4.8±2.3) mean number of hours per outing. The mean annual CPUE per region ranged from (1.5 kg.fisher-1.hr-1) in Diani-Chale to (1.0 kg.fisher-1.hr-1) in Malindi-Ungwana bay. Making use of questionnaire data, the attitudes towards offshore fishing strategies, FADs in particular, were evaluated. Some communities (about 25% in every location) were not even aware of FAD fisheries. With the imminent introduction of a FAD fishery in Kenya, it was concluded that, for this fishery to realize its full potential, training on FAD fishing techniques has to be done. Finally, effective management is necessary if small-scale fisheries are to continue providing food security for many poor coastal communities. Gear-based management in Kenya, although under represented and under studied, has the potential to be adaptive, address multiple objectives, and be crafted to the socio-economic setting. Management effectiveness in near shore fisheries has generally been evaluated at the scale of the fish community. However, community level indicators can mask species-specific declines that provide significant portions of the fisheries yields and income. This thesis seeks to identify ways in which the Kenyan artisanal fishery can be sustained and managed from within coastal communities, giving them the resources and education to effectively improve their lives. The introduction of a offshore FAD fishery and hence access to offshore pelagic species provides an opportunity to not only alleviate pressure on coastal resources but also to empower coastal communities and contribute to the growth of Kenya’s national economy as a whole.
- Full Text:
- Date Issued: 2013
An analysis of temporal relations in languages: a comparative study of Mandarin and isiXhosa
- Authors: Ma, Xiujie
- Date: 2013 , 2013-01-30
- Subjects: Chinese language Xhosa language Grammar, Comparative and general -- Temporal constructions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2367 , http://hdl.handle.net/10962/d1003055
- Description: This study sought to investigate how temporal relations are expressed in Mandarin and isiXhosa. The objective was to compare how two typologically distinct languages, one isolating and the other agglutinating, cope with the encoding of situations that occur at different positions on the time line. Data was drawn from questionnaire responses from, and interviews with, isiXhosa speakers who provided translations of a wide range of sentences from English into isiXhosa. The study revealed that isiXhosa relies on the grammatical category – tense – to encode temporal relations, while Mandarin relies more on lexical and pragmatic devices – the use of temporal adverbials and the implication of aspectual markings – to locate a situation on the time line. Typically, each sentence in isiXhosa must be marked for tense: temporal adverbials are optional elements and used to more precisely locate the situation on the time line. By contrast, in Mandarin, temporal adverbials have a more central function in that they independently express different positions on the time line: without temporal adverbials, it is extremely difficult to locate a situation on the time line in some sentences. Another important difference between the two languages was revealed in this study: isiXhosa grammar allows speakers to talk about situations in terms of their distance (past or future) from the speech time whereas Mandarin grammar allows its speakers to talk about situations in terms of the internal properties (e.g. completed, ongoing, etc.) of those situations. The study revealed that isiXhosa and Mandarin are similar in one important respect: both languages have no formal properties, i.e. overt tense markers (isiXhosa) and compulsory temporal adverbials or other temporal devices (Mandarin) for marking the temporal location of present situations. The study also revealed that both languages encode ‘pastness’ in terms of whether or not the effects of the situation in question still remain at speech time.
- Full Text:
- Date Issued: 2013
- Authors: Ma, Xiujie
- Date: 2013 , 2013-01-30
- Subjects: Chinese language Xhosa language Grammar, Comparative and general -- Temporal constructions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2367 , http://hdl.handle.net/10962/d1003055
- Description: This study sought to investigate how temporal relations are expressed in Mandarin and isiXhosa. The objective was to compare how two typologically distinct languages, one isolating and the other agglutinating, cope with the encoding of situations that occur at different positions on the time line. Data was drawn from questionnaire responses from, and interviews with, isiXhosa speakers who provided translations of a wide range of sentences from English into isiXhosa. The study revealed that isiXhosa relies on the grammatical category – tense – to encode temporal relations, while Mandarin relies more on lexical and pragmatic devices – the use of temporal adverbials and the implication of aspectual markings – to locate a situation on the time line. Typically, each sentence in isiXhosa must be marked for tense: temporal adverbials are optional elements and used to more precisely locate the situation on the time line. By contrast, in Mandarin, temporal adverbials have a more central function in that they independently express different positions on the time line: without temporal adverbials, it is extremely difficult to locate a situation on the time line in some sentences. Another important difference between the two languages was revealed in this study: isiXhosa grammar allows speakers to talk about situations in terms of their distance (past or future) from the speech time whereas Mandarin grammar allows its speakers to talk about situations in terms of the internal properties (e.g. completed, ongoing, etc.) of those situations. The study revealed that isiXhosa and Mandarin are similar in one important respect: both languages have no formal properties, i.e. overt tense markers (isiXhosa) and compulsory temporal adverbials or other temporal devices (Mandarin) for marking the temporal location of present situations. The study also revealed that both languages encode ‘pastness’ in terms of whether or not the effects of the situation in question still remain at speech time.
- Full Text:
- Date Issued: 2013
Growth and gonad size in cultured South African abalone, Haliotis midae
- Authors: Riddin, Nicholas Alwyn
- Date: 2013
- Subjects: Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- Growth -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5180 , http://hdl.handle.net/10962/d1001651 , Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- Growth -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Description: According to farm records, cultured Haliotis midae (50-70 g.abalone⁻¹) were growing 10% slower in winter when compared to summer. This reduction in growth rate also coincided with enlarged gonads. Initial trials showed that there were differences in mean monthly growth rates ranging from 1.97 – 5.14 g abalone⁻¹ month⁻¹, and gonad bulk index (GBI) also varied between months (GBI range: 26.88 ± 12.87 to 51.03 ± 34.47). The investment of energy into gonad tissue growth did not compromise whole body growth as the abalone continued to gain weight throughout the reproductive periods, probably due to gonadal growth. Growth of this size class of abalone was not influenced by water temperature or day length, suggesting favourable on-farm culture conditions (regression analyses, p > 0.05). There is no need to implement a seasonal dietary regime. Cultured H. midae were fed artificial diets with different protein sources, including only soya, only fishmeal, a combination of soya and fishmeal, and these were compared to kelp-fed abalone. Kelp-fed abalone grew slower than those fed artificial feeds (p>0.05). Gonad growth was the greatest when soya meal was included in the diet (average GBI: 74.91 ± 23.31), while the average gonad size of abalone fed the fishmealbased diet had gonads which were 38% smaller, and kelp-fed abalone had gonads which were 75% smaller than those of the abalone fed on diets containing soya meal. The increased gonad mass in abalone fed on diets including soya meal could be attributed to phytoestrogenic activity, as a result of the presence of isoflavones found in the soya plant; this remains to be tested. The use of soya in brood stock diet development is advised. The influence of dietary protein to energy ratio (1.41 – 2.46 g MJ⁻¹) on growth and gonad size was tested. Protein and energy levels within the ranges tested (22 and 33% protein; 13.5 and 15.6 MJ kg⁻¹) did not interact to influence growth rates of cultured H. midae. GBI increased from 50.67 ± 4.16 to 83.93 ± 9.35 units as a function of dietary protein to energy ratio (y = 42.02 x⁰·⁸¹; r² = 0.19; regression analysis: F₁¸₃₈ = 8.9; p = 0.005). In addition, protein level influenced gonad size, with gonad growth being greater in abalone fed the high protein diet (factorial ANOVA: F₁¸₃₂ = 7.1, p = 0.012). Canning yields were reduced by 7% when the protein content was increased, while increasing the quantity of dietary energy improved canning yields by ~ 6% (one-way ANOVA: F₁¸₂₈ = 14.4, p= 0.001). The present study provided evidence that although growth rates are varying seasonally, reproductive investment is not hindering weight gain. Gonad growth can be influenced if desired by farms, depending on the level of soya inclusion, as well as the protein to energy ratio in the diet. Monthly variation in growth and gonad size, as well as the influence of diet on gonad growth were highlighted, and the implications for farm application and further research were discussed.
- Full Text:
- Date Issued: 2013
- Authors: Riddin, Nicholas Alwyn
- Date: 2013
- Subjects: Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- Growth -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5180 , http://hdl.handle.net/10962/d1001651 , Haliotis midae -- South Africa , Haliotis midae fisheries -- South Africa , Abalone culture -- South Africa , Abalones -- Physiology -- South Africa , Abalones -- Growth -- South Africa , Abalones -- Feeding and feeds -- South Africa
- Description: According to farm records, cultured Haliotis midae (50-70 g.abalone⁻¹) were growing 10% slower in winter when compared to summer. This reduction in growth rate also coincided with enlarged gonads. Initial trials showed that there were differences in mean monthly growth rates ranging from 1.97 – 5.14 g abalone⁻¹ month⁻¹, and gonad bulk index (GBI) also varied between months (GBI range: 26.88 ± 12.87 to 51.03 ± 34.47). The investment of energy into gonad tissue growth did not compromise whole body growth as the abalone continued to gain weight throughout the reproductive periods, probably due to gonadal growth. Growth of this size class of abalone was not influenced by water temperature or day length, suggesting favourable on-farm culture conditions (regression analyses, p > 0.05). There is no need to implement a seasonal dietary regime. Cultured H. midae were fed artificial diets with different protein sources, including only soya, only fishmeal, a combination of soya and fishmeal, and these were compared to kelp-fed abalone. Kelp-fed abalone grew slower than those fed artificial feeds (p>0.05). Gonad growth was the greatest when soya meal was included in the diet (average GBI: 74.91 ± 23.31), while the average gonad size of abalone fed the fishmealbased diet had gonads which were 38% smaller, and kelp-fed abalone had gonads which were 75% smaller than those of the abalone fed on diets containing soya meal. The increased gonad mass in abalone fed on diets including soya meal could be attributed to phytoestrogenic activity, as a result of the presence of isoflavones found in the soya plant; this remains to be tested. The use of soya in brood stock diet development is advised. The influence of dietary protein to energy ratio (1.41 – 2.46 g MJ⁻¹) on growth and gonad size was tested. Protein and energy levels within the ranges tested (22 and 33% protein; 13.5 and 15.6 MJ kg⁻¹) did not interact to influence growth rates of cultured H. midae. GBI increased from 50.67 ± 4.16 to 83.93 ± 9.35 units as a function of dietary protein to energy ratio (y = 42.02 x⁰·⁸¹; r² = 0.19; regression analysis: F₁¸₃₈ = 8.9; p = 0.005). In addition, protein level influenced gonad size, with gonad growth being greater in abalone fed the high protein diet (factorial ANOVA: F₁¸₃₂ = 7.1, p = 0.012). Canning yields were reduced by 7% when the protein content was increased, while increasing the quantity of dietary energy improved canning yields by ~ 6% (one-way ANOVA: F₁¸₂₈ = 14.4, p= 0.001). The present study provided evidence that although growth rates are varying seasonally, reproductive investment is not hindering weight gain. Gonad growth can be influenced if desired by farms, depending on the level of soya inclusion, as well as the protein to energy ratio in the diet. Monthly variation in growth and gonad size, as well as the influence of diet on gonad growth were highlighted, and the implications for farm application and further research were discussed.
- Full Text:
- Date Issued: 2013
The landscape holds answers to more questions than we have yet learned to ask : perspectives of an environmental scientist
- Authors: Ellery, William F N
- Date: 2013
- Language: English
- Type: Text
- Identifier: vital:584 , http://hdl.handle.net/10962/d1018944
- Description: [From the text] Implicit in the title of my talk is the idea that the landscape has a voice – it "holds answers". Our understanding of landscapes depends on the questions we ask about their appearance and dynamics. What I love about the voice of landscapes is its gentle nature – it whispers. It's a seductive voice, inviting one to hear secrets. I have long been curious about the intimate language of landscapes and this has stemmed from a personal connection with nature from a very early age. My interests led me into the fields of ecology and geomorphology, both of which have allowed me to unravel some of these secrets. So, in tonight’s talk there are a number of narratives that form a part of my story. The first narrative is about science. It’s about how we uncover nature’s secrets and thus create new understanding.
- Full Text:
- Date Issued: 2013
- Authors: Ellery, William F N
- Date: 2013
- Language: English
- Type: Text
- Identifier: vital:584 , http://hdl.handle.net/10962/d1018944
- Description: [From the text] Implicit in the title of my talk is the idea that the landscape has a voice – it "holds answers". Our understanding of landscapes depends on the questions we ask about their appearance and dynamics. What I love about the voice of landscapes is its gentle nature – it whispers. It's a seductive voice, inviting one to hear secrets. I have long been curious about the intimate language of landscapes and this has stemmed from a personal connection with nature from a very early age. My interests led me into the fields of ecology and geomorphology, both of which have allowed me to unravel some of these secrets. So, in tonight’s talk there are a number of narratives that form a part of my story. The first narrative is about science. It’s about how we uncover nature’s secrets and thus create new understanding.
- Full Text:
- Date Issued: 2013
Exploring a grade 5 English teacher's strategies for helping her learners develop their reading literacy: a case study
- Authors: Robertson, Sally-Ann, 1952-
- Date: 2013
- Subjects: English language -- Study and teaching (Primary) -- South Africa -- Eastern Cape English language -- Study and teaching -- South Africa -- Eastern Cape -- Foreign speakers Reading (Elementary) -- Research -- South Africa -- Eastern Cape Literacy -- Education (Primary) -- Research -- South Africa -- Eastern Cape Education, Primary -- Research -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1389 , http://hdl.handle.net/10962/d1001667
- Description: Despite South Africa’s constitutional commitment to multilingualism, literacy in English is important in education and the economy. English is widely perceived as the language of opportunity, and many South African primary schools have chosen English as their language of learning and teaching (LoLT). In terms of South Africa’s 1997 Language in Education Policy, this choice means that such a school has to comply with English Home Language curriculum requirements. In situations where few learners (or teachers) have English as a home language, the choice of English as LoLT poses particular challenges, perhaps most crucially in the early years of literacy development. This investigation explores the work of an intermediate phase teacher working in the Eastern Cape province at a “no-fee” school where English is the chosen LoLT, but where the majority of learners have isiXhosa as their home language. A qualitative interpretive approach was used to focus on the teacher’s strategies for developing her Grade 5 learners’ reading literacy in English. Data were derived via lesson observation and in-depth interviewing. Fourteen of the teacher’s English lessons were observed and she was interviewed twice. Analysis of the data shows that few learners meet the reading literacy levels outlined in National Curriculum Statement guidelines. The teacher, working as she is in what are essentially subtractive bilingualism circumstances, is poorly equipped to cope with the task of developing her learners’ reading literacy. I argue that educational policy, contributing as it does to the ongoing displacement, by English, of many South African children’s home languages, not only undermines the post-apartheid Government’s attempts at linguistic equity, but also contributes significantly to unequal reading literacy achievement across South Africa’s different socio-economic sectors. Department of Basic Education officials, academics and others involved in decision-making around teacher education and development need to work together to interrogate policy and put in place more effective support structures to help teachers better cope with the exigencies outlined above.
- Full Text:
- Date Issued: 2013
- Authors: Robertson, Sally-Ann, 1952-
- Date: 2013
- Subjects: English language -- Study and teaching (Primary) -- South Africa -- Eastern Cape English language -- Study and teaching -- South Africa -- Eastern Cape -- Foreign speakers Reading (Elementary) -- Research -- South Africa -- Eastern Cape Literacy -- Education (Primary) -- Research -- South Africa -- Eastern Cape Education, Primary -- Research -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1389 , http://hdl.handle.net/10962/d1001667
- Description: Despite South Africa’s constitutional commitment to multilingualism, literacy in English is important in education and the economy. English is widely perceived as the language of opportunity, and many South African primary schools have chosen English as their language of learning and teaching (LoLT). In terms of South Africa’s 1997 Language in Education Policy, this choice means that such a school has to comply with English Home Language curriculum requirements. In situations where few learners (or teachers) have English as a home language, the choice of English as LoLT poses particular challenges, perhaps most crucially in the early years of literacy development. This investigation explores the work of an intermediate phase teacher working in the Eastern Cape province at a “no-fee” school where English is the chosen LoLT, but where the majority of learners have isiXhosa as their home language. A qualitative interpretive approach was used to focus on the teacher’s strategies for developing her Grade 5 learners’ reading literacy in English. Data were derived via lesson observation and in-depth interviewing. Fourteen of the teacher’s English lessons were observed and she was interviewed twice. Analysis of the data shows that few learners meet the reading literacy levels outlined in National Curriculum Statement guidelines. The teacher, working as she is in what are essentially subtractive bilingualism circumstances, is poorly equipped to cope with the task of developing her learners’ reading literacy. I argue that educational policy, contributing as it does to the ongoing displacement, by English, of many South African children’s home languages, not only undermines the post-apartheid Government’s attempts at linguistic equity, but also contributes significantly to unequal reading literacy achievement across South Africa’s different socio-economic sectors. Department of Basic Education officials, academics and others involved in decision-making around teacher education and development need to work together to interrogate policy and put in place more effective support structures to help teachers better cope with the exigencies outlined above.
- Full Text:
- Date Issued: 2013
Fish and fisheries of Bangweulu wetlands, Zambia
- Huchzermeyer, Carl Friedrich
- Authors: Huchzermeyer, Carl Friedrich
- Date: 2013
- Subjects: Bangweulu Swamps (Zambia) , Fisheries -- Zambia -- Bangweulu Swamps , Fishes -- Zambia -- Bangweulu Swamps , Fishery management -- Zambia -- Bangweulu Swamps , Fishing -- Zambia -- Bangweulu Swamps , Fishing -- Economic aspects -- Zambia -- Bangweulu Swamps , Fish stock assessment -- Zambia -- Bangweulu Swamps , Fish as food -- Zambia -- Bangweulu Swamps , Conservation of natural resources -- Zambia -- Bangweulu Swamps , Sustainable development -- Zambia -- Bangweulu Swamps
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5203 , http://hdl.handle.net/10962/d1003927 , Bangweulu Swamps (Zambia) , Fisheries -- Zambia -- Bangweulu Swamps , Fishes -- Zambia -- Bangweulu Swamps , Fishery management -- Zambia -- Bangweulu Swamps , Fishing -- Zambia -- Bangweulu Swamps , Fishing -- Economic aspects -- Zambia -- Bangweulu Swamps , Fish stock assessment -- Zambia -- Bangweulu Swamps , Fish as food -- Zambia -- Bangweulu Swamps , Conservation of natural resources -- Zambia -- Bangweulu Swamps , Sustainable development -- Zambia -- Bangweulu Swamps
- Description: Bangweulu Wetlands is a 6000 km² public-private-partnership conservation area in northeastern Zambia, lying on the south-eastern margins of the Bangweulu Swamps, Congo River system. The area is important for wildlife conservation, tourism and as a fishing ground for the local inhabitants. This study provides a baseline of the fish and fisheries of this area. The conservation area is situated on the transition zone between woodland, floodplain and swamp. A total of 42 fish species representing 12 taxonomic families were collected. The fish fauna of the area was characterised by a diversity of small cyprinids (14 species), cichlids (9 species), clariid catfishes (4 species) and mormyrids (4 species). Species such as Clarias gariepinus, C. ngamensis, Marcusenius macrolepidotus, Tilapia rendali, T. sparrmanii and several small Barbus species were shared with adjacent floodplain systems such as the upper Zambezi and Kafue rivers. Fishing was undertaken by fishing groups consisting of a fisherman and his family, or a group of men fishing together. Access to the fishing grounds was controlled by traditional fishing leaders, who collected tribute from fishermen. Fishing groups utilised fixed, distinct fishing areas determined by ancestry. The most important time for fishing was during the drawdown phase of the floodplains, from March until June. During the dry season fewer groups were engaged in fishing, with many having returned to farming activities. The main fishing methods of the floodplain fishery were basket traps and mosquito-mesh funnel nets set into earth fish barriers (fish weirs) constructed on the plains, various mesh sizes of gillnets, hook longlines and seine nets. The use of fish spears, drag baskets and piscicides was of lesser importance. Most fishing gears were constructed of a variety of natural and modern, manufactured materials. The fishery was multi-species and 23 fish species were recorded from in catch. The three most important species in the catches were C. gariepinus, T. rendalli and M. macrolepidotus. Together these contributed 67% by weight to the catch. Catch-per-unit-effort (CPUE) for the different gears was 0.4 ± 0.3 kg.trap.night⁻¹ for basket traps, 2.7 ± 4.6 kg.net.night⁻¹ for funnel nets, 0.3 ± 0.5 kg.50 m net.night⁻¹ for gill nets, 3.5 ± 6.3 kg.100 hooks.night⁻¹ for longlines, 1.79 ± 1.11 kg.haul⁻¹ for mosquito-mesh seine nets and 6.87 ± 6.27 kg.haul⁻¹ for larger-mesh seine nets. The weight of average daily landings of fishing groups, using a variety of gears was 7.8 ± 7.4 kg. Fishermen were able to maintain the same catch rate between dry and wet seasons, with no significant differences (p < 0.05) in daily landings between seasons. Yield per fisherman for a seven month season, which required 2-3 relocations due to falling water level, was 1.64 t based on catch assessment, and 1.9 t from a socio-economic survey. A tentative yield per area estimate for the area was 2I7 kg.ha⁻¹ over the three month shallow-floodplain fishing season. Most fish landed in the fishery were processed into sundried or smoke-dried products. These were used for 1) home consumption, 2) trade with village farmers (from up to 70 km inland of the fishing grounds) in exchange for staple starch meal, and 3) sold to urban fish traders, reaching markets as distant as Lubumbashi in Democratic Republic of Congo. Fish traders toured fishing camps to buy fish, supporting auxiliary industries such as transport and accommodation services. The price for dried fish at source was 3.14 ± 1.34 USDlkg and the market price reported for the Zambian Copperbelt was 6.14 ± 2.54 USD/kg. Typical returns on investment in fish trading were estimated as 68-77%. The fishery was considered to be biologically and socially sustainable. By harvesting a seasonally transient assemblage of species with high productivity and biological turnover rates and with life histories adapted to high mortality, fishermen were able to maintain a stable and viable livelihood. Management recommendations for the area were that a fisheries management plan be developed that would seek to strengthen the traditional system of rights-allocation, address problems between fishing and tourism activities, and enhance communication between fisheries and conservation stakeholders. To do this it was recommended that: 1) conservation authorities recognise the importance of the fishery, 2) no changes to current effort levels and fishing methods were necessary, 3) points 1 and 2 above be used to improve communication and trust between conservation authorities and fishermen, 4) customary resource-access mechanisms be understood and strengthened so that local inhabitants' rights to the resource are protected, 5) fishermen help formulate and accept conservation and tourism rules, 6) tourists and guides be made aware of the function of the fishery, 7) a fisheries management forum of key community, government and conservation stakeholders be formed to shape and implement the fisheries management plan, 8) locally-adapted bylaws be created to legitimise crucial floodplain gears currently considered illegal (e.g. mosquito-net gears, fish weirs), 9) no intervention to formalise fish trading be made, and 10) a trained person with a fisheries background be hired oversee the implementation of the recommendations.
- Full Text:
- Date Issued: 2013
- Authors: Huchzermeyer, Carl Friedrich
- Date: 2013
- Subjects: Bangweulu Swamps (Zambia) , Fisheries -- Zambia -- Bangweulu Swamps , Fishes -- Zambia -- Bangweulu Swamps , Fishery management -- Zambia -- Bangweulu Swamps , Fishing -- Zambia -- Bangweulu Swamps , Fishing -- Economic aspects -- Zambia -- Bangweulu Swamps , Fish stock assessment -- Zambia -- Bangweulu Swamps , Fish as food -- Zambia -- Bangweulu Swamps , Conservation of natural resources -- Zambia -- Bangweulu Swamps , Sustainable development -- Zambia -- Bangweulu Swamps
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5203 , http://hdl.handle.net/10962/d1003927 , Bangweulu Swamps (Zambia) , Fisheries -- Zambia -- Bangweulu Swamps , Fishes -- Zambia -- Bangweulu Swamps , Fishery management -- Zambia -- Bangweulu Swamps , Fishing -- Zambia -- Bangweulu Swamps , Fishing -- Economic aspects -- Zambia -- Bangweulu Swamps , Fish stock assessment -- Zambia -- Bangweulu Swamps , Fish as food -- Zambia -- Bangweulu Swamps , Conservation of natural resources -- Zambia -- Bangweulu Swamps , Sustainable development -- Zambia -- Bangweulu Swamps
- Description: Bangweulu Wetlands is a 6000 km² public-private-partnership conservation area in northeastern Zambia, lying on the south-eastern margins of the Bangweulu Swamps, Congo River system. The area is important for wildlife conservation, tourism and as a fishing ground for the local inhabitants. This study provides a baseline of the fish and fisheries of this area. The conservation area is situated on the transition zone between woodland, floodplain and swamp. A total of 42 fish species representing 12 taxonomic families were collected. The fish fauna of the area was characterised by a diversity of small cyprinids (14 species), cichlids (9 species), clariid catfishes (4 species) and mormyrids (4 species). Species such as Clarias gariepinus, C. ngamensis, Marcusenius macrolepidotus, Tilapia rendali, T. sparrmanii and several small Barbus species were shared with adjacent floodplain systems such as the upper Zambezi and Kafue rivers. Fishing was undertaken by fishing groups consisting of a fisherman and his family, or a group of men fishing together. Access to the fishing grounds was controlled by traditional fishing leaders, who collected tribute from fishermen. Fishing groups utilised fixed, distinct fishing areas determined by ancestry. The most important time for fishing was during the drawdown phase of the floodplains, from March until June. During the dry season fewer groups were engaged in fishing, with many having returned to farming activities. The main fishing methods of the floodplain fishery were basket traps and mosquito-mesh funnel nets set into earth fish barriers (fish weirs) constructed on the plains, various mesh sizes of gillnets, hook longlines and seine nets. The use of fish spears, drag baskets and piscicides was of lesser importance. Most fishing gears were constructed of a variety of natural and modern, manufactured materials. The fishery was multi-species and 23 fish species were recorded from in catch. The three most important species in the catches were C. gariepinus, T. rendalli and M. macrolepidotus. Together these contributed 67% by weight to the catch. Catch-per-unit-effort (CPUE) for the different gears was 0.4 ± 0.3 kg.trap.night⁻¹ for basket traps, 2.7 ± 4.6 kg.net.night⁻¹ for funnel nets, 0.3 ± 0.5 kg.50 m net.night⁻¹ for gill nets, 3.5 ± 6.3 kg.100 hooks.night⁻¹ for longlines, 1.79 ± 1.11 kg.haul⁻¹ for mosquito-mesh seine nets and 6.87 ± 6.27 kg.haul⁻¹ for larger-mesh seine nets. The weight of average daily landings of fishing groups, using a variety of gears was 7.8 ± 7.4 kg. Fishermen were able to maintain the same catch rate between dry and wet seasons, with no significant differences (p < 0.05) in daily landings between seasons. Yield per fisherman for a seven month season, which required 2-3 relocations due to falling water level, was 1.64 t based on catch assessment, and 1.9 t from a socio-economic survey. A tentative yield per area estimate for the area was 2I7 kg.ha⁻¹ over the three month shallow-floodplain fishing season. Most fish landed in the fishery were processed into sundried or smoke-dried products. These were used for 1) home consumption, 2) trade with village farmers (from up to 70 km inland of the fishing grounds) in exchange for staple starch meal, and 3) sold to urban fish traders, reaching markets as distant as Lubumbashi in Democratic Republic of Congo. Fish traders toured fishing camps to buy fish, supporting auxiliary industries such as transport and accommodation services. The price for dried fish at source was 3.14 ± 1.34 USDlkg and the market price reported for the Zambian Copperbelt was 6.14 ± 2.54 USD/kg. Typical returns on investment in fish trading were estimated as 68-77%. The fishery was considered to be biologically and socially sustainable. By harvesting a seasonally transient assemblage of species with high productivity and biological turnover rates and with life histories adapted to high mortality, fishermen were able to maintain a stable and viable livelihood. Management recommendations for the area were that a fisheries management plan be developed that would seek to strengthen the traditional system of rights-allocation, address problems between fishing and tourism activities, and enhance communication between fisheries and conservation stakeholders. To do this it was recommended that: 1) conservation authorities recognise the importance of the fishery, 2) no changes to current effort levels and fishing methods were necessary, 3) points 1 and 2 above be used to improve communication and trust between conservation authorities and fishermen, 4) customary resource-access mechanisms be understood and strengthened so that local inhabitants' rights to the resource are protected, 5) fishermen help formulate and accept conservation and tourism rules, 6) tourists and guides be made aware of the function of the fishery, 7) a fisheries management forum of key community, government and conservation stakeholders be formed to shape and implement the fisheries management plan, 8) locally-adapted bylaws be created to legitimise crucial floodplain gears currently considered illegal (e.g. mosquito-net gears, fish weirs), 9) no intervention to formalise fish trading be made, and 10) a trained person with a fisheries background be hired oversee the implementation of the recommendations.
- Full Text:
- Date Issued: 2013
The eyes of the wall : space, narrative and perspective
- Authors: Baasch, Rachel Mary
- Date: 2013
- Subjects: Installations (Art) , Frames (Sociology) , Architecture, Domestic, in art , Narrative art
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2388 , http://hdl.handle.net/10962/d1001578
- Description: The Eyes of the Wall and Other Short Stories is concerned with dialectics of seeing and perceiving as they pertain directly to a corporal understanding of interiority and exteriority, architectural framing and notions of dislocation in relation to place. This practical submission is a site-specific installation that engages in a reciprocal dialogue with its environment. The individual sculptural works which demarcate the parameters of the installation are hybrids of domestic architectural forms, (namely the wall, the window and the door) and internal furnishings such as the curtain and the bed. These hybridised metal and resin constructions frame the interior of a site, a tennis court located within my immediate Grahamstown environment. The placement of familiar objects generally associated with the home and notions of security and privacy, within the open, exposed and permeable enclosure of the tennis court evoke a sense of displacement within the viewer. This supporting document, The Eyes of the Wall: Space, Narrative and Perspective, considers the key conceptual concerns informing my installation. In this mini-thesis I address the relationship between domestic architecture and the body, examining the notion of framing as fundamental to the individual comprehension of space. I position my work in relation to that of Mona Hatoum drawing on the similarities that exist between her practice and my own. In the first chapter of this paper: My House/Your House: Walls, Windows, Doors and Skins I address the relationship between domestic architecture, framing and the body, and ‘contamination’. Within Chapter Two: Narratives of Division I engage with the idea of multiple ‘short stories’—personal and collective narratives—and their connection to issues of division and dislocation. Chapter Three: Seeing Blindness discusses the possibility that perspective, or at least one potential approach to perspective is concerned with that which one cannot see, an acknowledgment of the implicit relationship between seeing and not-seeing. Each of the three core concerns expressed in the title of this mini-thesis, The Eyes of The Wall: Space, Narrative and Perspective intersect within the site of The Eyes of The Wall and Other Short Stories. It is at this intersection that the shadows of stories within stories within stories insert themselves, like phantom limbs into the gaps and tensions framed by the forms of the installation.
- Full Text:
- Date Issued: 2013
- Authors: Baasch, Rachel Mary
- Date: 2013
- Subjects: Installations (Art) , Frames (Sociology) , Architecture, Domestic, in art , Narrative art
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2388 , http://hdl.handle.net/10962/d1001578
- Description: The Eyes of the Wall and Other Short Stories is concerned with dialectics of seeing and perceiving as they pertain directly to a corporal understanding of interiority and exteriority, architectural framing and notions of dislocation in relation to place. This practical submission is a site-specific installation that engages in a reciprocal dialogue with its environment. The individual sculptural works which demarcate the parameters of the installation are hybrids of domestic architectural forms, (namely the wall, the window and the door) and internal furnishings such as the curtain and the bed. These hybridised metal and resin constructions frame the interior of a site, a tennis court located within my immediate Grahamstown environment. The placement of familiar objects generally associated with the home and notions of security and privacy, within the open, exposed and permeable enclosure of the tennis court evoke a sense of displacement within the viewer. This supporting document, The Eyes of the Wall: Space, Narrative and Perspective, considers the key conceptual concerns informing my installation. In this mini-thesis I address the relationship between domestic architecture and the body, examining the notion of framing as fundamental to the individual comprehension of space. I position my work in relation to that of Mona Hatoum drawing on the similarities that exist between her practice and my own. In the first chapter of this paper: My House/Your House: Walls, Windows, Doors and Skins I address the relationship between domestic architecture, framing and the body, and ‘contamination’. Within Chapter Two: Narratives of Division I engage with the idea of multiple ‘short stories’—personal and collective narratives—and their connection to issues of division and dislocation. Chapter Three: Seeing Blindness discusses the possibility that perspective, or at least one potential approach to perspective is concerned with that which one cannot see, an acknowledgment of the implicit relationship between seeing and not-seeing. Each of the three core concerns expressed in the title of this mini-thesis, The Eyes of The Wall: Space, Narrative and Perspective intersect within the site of The Eyes of The Wall and Other Short Stories. It is at this intersection that the shadows of stories within stories within stories insert themselves, like phantom limbs into the gaps and tensions framed by the forms of the installation.
- Full Text:
- Date Issued: 2013
Value and size investment strategies: evidence from the cross-section of returns in the South African equity market
- Authors: Barnard, Kevin John
- Date: 2013
- Subjects: Financial risk -- South Africa , Saving and investment -- South Africa , Stock exchanges -- South Africa , Investments -- Psychological aspects , Investments -- Decision making , Value premium , Size effect , Rational finance , Behavioural finance , South African equity markets
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:874 , http://hdl.handle.net/10962/d1001606 , Financial risk -- South Africa , Saving and investment -- South Africa , Stock exchanges -- South Africa , Investments -- Psychological aspects , Investments -- Decision making
- Description: Value and size related equity investment strategies are supported by a large body of empirical research that shows a persistent premium, both longitudinally and crosssectionally. However, the competing rational and behavioural finance explanations for the success of these strategies are a subject of debate. The rational explanation is that the premium earned on value shares or shares of small companies can be attributed to higher risk. Behaviouralists argue that such shares are not riskier and attribute the premium to cognitive errors and biases in human decision making. The purpose of this study is to determine, firstly, whether the value and size premium exist in South Africa during the period July 2006 to June 2012, which includes one of the worst equity market crises in history. Secondly, this study sets out to determine whether the premium earned on value and size strategies are adequately explained by the principles of rational finance theory. To provide evidence regarding the existence of the value premium and size effect, returns are analysed, cross-sectionally, on portfolios of shares sorted by value and size. For evidence of a rational explanation, returns are regressed on value and size variables, and the relative riskiness of value and small companies is analysed. The results show evidence of a value premium in portfolios of small companies, but not big companies. The size effect is found not to be statistically significant. While regressions do show significant relationships between value and size variables and returns, these variables are found not to be associated with higher levels of risk. The conclusion is that the evidence does not support a rational, risk based explanation of the returns
- Full Text:
- Date Issued: 2013
- Authors: Barnard, Kevin John
- Date: 2013
- Subjects: Financial risk -- South Africa , Saving and investment -- South Africa , Stock exchanges -- South Africa , Investments -- Psychological aspects , Investments -- Decision making , Value premium , Size effect , Rational finance , Behavioural finance , South African equity markets
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:874 , http://hdl.handle.net/10962/d1001606 , Financial risk -- South Africa , Saving and investment -- South Africa , Stock exchanges -- South Africa , Investments -- Psychological aspects , Investments -- Decision making
- Description: Value and size related equity investment strategies are supported by a large body of empirical research that shows a persistent premium, both longitudinally and crosssectionally. However, the competing rational and behavioural finance explanations for the success of these strategies are a subject of debate. The rational explanation is that the premium earned on value shares or shares of small companies can be attributed to higher risk. Behaviouralists argue that such shares are not riskier and attribute the premium to cognitive errors and biases in human decision making. The purpose of this study is to determine, firstly, whether the value and size premium exist in South Africa during the period July 2006 to June 2012, which includes one of the worst equity market crises in history. Secondly, this study sets out to determine whether the premium earned on value and size strategies are adequately explained by the principles of rational finance theory. To provide evidence regarding the existence of the value premium and size effect, returns are analysed, cross-sectionally, on portfolios of shares sorted by value and size. For evidence of a rational explanation, returns are regressed on value and size variables, and the relative riskiness of value and small companies is analysed. The results show evidence of a value premium in portfolios of small companies, but not big companies. The size effect is found not to be statistically significant. While regressions do show significant relationships between value and size variables and returns, these variables are found not to be associated with higher levels of risk. The conclusion is that the evidence does not support a rational, risk based explanation of the returns
- Full Text:
- Date Issued: 2013
Halting degradation of Southern Cape peatlands in agricultural landscapes
- Job, Nancy, Ellery, William F N
- Authors: Job, Nancy , Ellery, William F N
- Date: 2013
- Subjects: Peatlands -- South Africa -- Southern Cape Wetland ecology -- South Africa -- Southern Cape South Africa -- Social conditions
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/50013 , vital:25951
- Description: Palmiet peatlands in the agricultural landscape are viewed by farmers as problematic. They obstruct the effective passage of water along watercourses and therefore promote localized flooding of lands and infrastructure, and they trap sediment delivered along watercourses that drowns fields and infrastructure with sedimentary deposits. These events are problematic for farmers trying to make a living off the land. Wetlands are also often viewed as wastelands that should be put to more productive use. The obvious thing to do is to bring in machinery to drain the wetlands and improve the flow of water and sediment through these wetlands.
- Full Text:
- Date Issued: 2013
- Authors: Job, Nancy , Ellery, William F N
- Date: 2013
- Subjects: Peatlands -- South Africa -- Southern Cape Wetland ecology -- South Africa -- Southern Cape South Africa -- Social conditions
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10962/50013 , vital:25951
- Description: Palmiet peatlands in the agricultural landscape are viewed by farmers as problematic. They obstruct the effective passage of water along watercourses and therefore promote localized flooding of lands and infrastructure, and they trap sediment delivered along watercourses that drowns fields and infrastructure with sedimentary deposits. These events are problematic for farmers trying to make a living off the land. Wetlands are also often viewed as wastelands that should be put to more productive use. The obvious thing to do is to bring in machinery to drain the wetlands and improve the flow of water and sediment through these wetlands.
- Full Text:
- Date Issued: 2013
An evaluation of the use of testamentary and Inter vivos trusts as estate-planning vehicles and the development of holistic estate-planning models involving the use of these trusts
- Authors: Naidoo, Loganathan
- Date: 2013
- Subjects: Commission of Inquiry into Certain Aspects of the Tax Structure of South Africa Income tax -- Law and legislation -- South Africa Taxation -- Law and legislation -- South Africa Trusts and trustees -- South Africa Trusts and trustees -- Taxations -- South Africa Estate planning -- South Africa Estates (Law) -- South Africa Administration of estates -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:904 , http://hdl.handle.net/10962/d1008100
- Description: Trusts are subject to multiple forms of legislative regulation dealing with taxation and governance. Trusts were widely used by planners as tax avoidance shelters. Tax legislation was amended to subject trusts, other than special trusts as defined, to the highest income tax rate of forty percent, in terms of section 5(2) of the Income Tax Act, 58 of 1962. The inter vivos trust is also subject to a wide range of anti-avoidance measures, including those contained in sub-sections (3) to (8) of section 7 of the Income Tax Act and Part X of the Eighth Schedule to the Act, as well as the general anti -avoidance measures in section 103. These measures impact negatively on the use of trusts for estate-planning purposes. The research objective was to evaluate the use of testamentary and inter vivos trusts for estate-planning purposes and to develop a holistic estate-planning model incorporating these planning instruments. Both the testamentary trust and the inter vivos trust were evaluated against broad principles of effective estate planning and the taxes and duties applicable to them. The research also reviewed the writings of financial planners on various techniques and models used for estate planning, as wells as case studies documented in the literature. The research developed and evaluated holistic estate-planning models incorporating testamentary trusts and inter vivos trusts, respectively. By neutralizing the effects of various taxes and duties, it was demonstrated that it is possible to develop an estate plan that satisfies most of the requirements of effective estate planning.
- Full Text:
- Date Issued: 2013
- Authors: Naidoo, Loganathan
- Date: 2013
- Subjects: Commission of Inquiry into Certain Aspects of the Tax Structure of South Africa Income tax -- Law and legislation -- South Africa Taxation -- Law and legislation -- South Africa Trusts and trustees -- South Africa Trusts and trustees -- Taxations -- South Africa Estate planning -- South Africa Estates (Law) -- South Africa Administration of estates -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:904 , http://hdl.handle.net/10962/d1008100
- Description: Trusts are subject to multiple forms of legislative regulation dealing with taxation and governance. Trusts were widely used by planners as tax avoidance shelters. Tax legislation was amended to subject trusts, other than special trusts as defined, to the highest income tax rate of forty percent, in terms of section 5(2) of the Income Tax Act, 58 of 1962. The inter vivos trust is also subject to a wide range of anti-avoidance measures, including those contained in sub-sections (3) to (8) of section 7 of the Income Tax Act and Part X of the Eighth Schedule to the Act, as well as the general anti -avoidance measures in section 103. These measures impact negatively on the use of trusts for estate-planning purposes. The research objective was to evaluate the use of testamentary and inter vivos trusts for estate-planning purposes and to develop a holistic estate-planning model incorporating these planning instruments. Both the testamentary trust and the inter vivos trust were evaluated against broad principles of effective estate planning and the taxes and duties applicable to them. The research also reviewed the writings of financial planners on various techniques and models used for estate planning, as wells as case studies documented in the literature. The research developed and evaluated holistic estate-planning models incorporating testamentary trusts and inter vivos trusts, respectively. By neutralizing the effects of various taxes and duties, it was demonstrated that it is possible to develop an estate plan that satisfies most of the requirements of effective estate planning.
- Full Text:
- Date Issued: 2013
An enquiry into the formative and summative assessment procedures, and perceptions thereof, of grade 10 mathematics teachers : a Namibian case study
- Authors: Marongwe, Anesu Desmond
- Date: 2013
- Subjects: Mathematics -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1385 , http://hdl.handle.net/10962/d1001513
- Description: The purpose of this study was to gain insight into observed discrepancies between continuous assessment and final examination average marks in Grade 10 Mathematics in the Oshikoto region of Namibia. The study is framed as a case study and is grounded within the interpretive paradigm. A mixed methods approach was applied, eliciting both quantitative as well as qualitative data. The study took place in two phases. In Phase 1, continuous assessment and Grade 10 final examination average marks for 62 Junior Secondary Schools for the period 2008-2010 were gathered and analyzed. Schools were characterized in terms of the relationship between their continuous assessment and final examination average marks for each of the three years. Phase 2, which was informed by Phase 1, took the form of structured interviews with a sample of three Mathematics teachers and three principals along with a focus-group interview of twelve teachers in order to investigate more deeply the perceptions of teachers and principals toward assessment policy and practice. The study shows that Grade 10 assessment practice in Namibian schools is far from ideal. Many teachers are not fully conversant with the various continuous assessment components as outlined by policy, and teachers are not confident about setting appropriate continuous assessment tasks. There is a strong perception that continuous assessment marks can easily be inflated and those teachers who gave high continuous assessment marks to their learners were generally perceived as being either incompetent or dishonest. While continuous assessment was seen as an important component of teaching and learning, it is evident that teachers and principals would welcome greater clarity, along with standardization and moderation, with respect to continuous assessment practice.
- Full Text:
- Date Issued: 2013
- Authors: Marongwe, Anesu Desmond
- Date: 2013
- Subjects: Mathematics -- Study and teaching (Secondary) -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1385 , http://hdl.handle.net/10962/d1001513
- Description: The purpose of this study was to gain insight into observed discrepancies between continuous assessment and final examination average marks in Grade 10 Mathematics in the Oshikoto region of Namibia. The study is framed as a case study and is grounded within the interpretive paradigm. A mixed methods approach was applied, eliciting both quantitative as well as qualitative data. The study took place in two phases. In Phase 1, continuous assessment and Grade 10 final examination average marks for 62 Junior Secondary Schools for the period 2008-2010 were gathered and analyzed. Schools were characterized in terms of the relationship between their continuous assessment and final examination average marks for each of the three years. Phase 2, which was informed by Phase 1, took the form of structured interviews with a sample of three Mathematics teachers and three principals along with a focus-group interview of twelve teachers in order to investigate more deeply the perceptions of teachers and principals toward assessment policy and practice. The study shows that Grade 10 assessment practice in Namibian schools is far from ideal. Many teachers are not fully conversant with the various continuous assessment components as outlined by policy, and teachers are not confident about setting appropriate continuous assessment tasks. There is a strong perception that continuous assessment marks can easily be inflated and those teachers who gave high continuous assessment marks to their learners were generally perceived as being either incompetent or dishonest. While continuous assessment was seen as an important component of teaching and learning, it is evident that teachers and principals would welcome greater clarity, along with standardization and moderation, with respect to continuous assessment practice.
- Full Text:
- Date Issued: 2013
The isolation and characterisation of secondary metabolites from selected South African marine red algae (Rhodophyta)
- Authors: Fakee, Jameel
- Date: 2013
- Subjects: Metabolites Marine algae -- South Africa Marine algae -- Therapeutic use Metabolites -- Therapeutic use Marine metabolites Plocamocera Red algae Laurencia Delisea flaccida
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3733 , http://hdl.handle.net/10962/d1001472
- Description: Secondary metabolites from natural sources are fast growing as popular drug leads. The structural novelty and favourable biological activity that these compounds display contribute to their popularity as drugs of the future. Examples of such compounds include the potent anticancer drug paclitaxel isolated from the bark of a yew tree as well as the more commonly known analgesic aspirin which stems from the bark of the willow tree. The biological activities exhibited by these secondary metabolites are vast and range from antimicrobial to anticancer activity to mention but a few. As a result, the isolation of novel compounds from natural sources is on the rise. The South African seaboard is home to a wealth of various marine algal species which produce fascinating secondary metabolites. For example, Portierria hornemanii was shown to produce halomon, a halogenated monoterpene which has displayed promising cytotoxic activity. This study thus focused primarily on pursuing novel compounds from three endemic South African marine algal species which have never been analysed previously from a chemical perspective. These are Plocamium rigidum (Bory de Saint-Vincent), Laurencia natalensis (Kylin) and Delisea flaccida (Suhr) Papenfuss. Four known compounds and one new halogenated monoterpene, (2E,5E,7Z)-8-chloro- 7-(dichloromethyl)-4-hydroxy-3-methylocta-2,5,7-trienal, were isolated from Plocamium rigidum. The breast cancer (MCF-7 cell line) inhibitory activity for these compounds was assessed and it was observed that an increase in the lipophilic nature of the compounds produced more favourable IC50 values. A pre-cursor to bromofucin type compounds, cis-laurencenyne, was isolated from Laurencia natalensis, as well as a new acetoxy chamigrane type compound, 4-bromo- 3,10-dichloro-7-hydroxy-3,7,11,11-tetramethylspiro [6.6] undec-1-yl acetate. Delisea flaccida was seen to contain two known bromofuranone type compounds isolated as an isomeric mixture, 1-[(5Z)-4-bromo-5-(bromomethylidene)-2-oxo-2,5- dihydrofuran-3-yl] butyl acetate and 1-[(5E)-4-bromo-5-(bromomethylidene)-2- oxo-2,5-dihydrofuran-3-yl]butyl acetate. These compounds are famous for their ability to inhibit bacterial biofilm production and they have been isolated before from an Australian Delisea spp , Adobe Acrobat 9.53 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
- Authors: Fakee, Jameel
- Date: 2013
- Subjects: Metabolites Marine algae -- South Africa Marine algae -- Therapeutic use Metabolites -- Therapeutic use Marine metabolites Plocamocera Red algae Laurencia Delisea flaccida
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3733 , http://hdl.handle.net/10962/d1001472
- Description: Secondary metabolites from natural sources are fast growing as popular drug leads. The structural novelty and favourable biological activity that these compounds display contribute to their popularity as drugs of the future. Examples of such compounds include the potent anticancer drug paclitaxel isolated from the bark of a yew tree as well as the more commonly known analgesic aspirin which stems from the bark of the willow tree. The biological activities exhibited by these secondary metabolites are vast and range from antimicrobial to anticancer activity to mention but a few. As a result, the isolation of novel compounds from natural sources is on the rise. The South African seaboard is home to a wealth of various marine algal species which produce fascinating secondary metabolites. For example, Portierria hornemanii was shown to produce halomon, a halogenated monoterpene which has displayed promising cytotoxic activity. This study thus focused primarily on pursuing novel compounds from three endemic South African marine algal species which have never been analysed previously from a chemical perspective. These are Plocamium rigidum (Bory de Saint-Vincent), Laurencia natalensis (Kylin) and Delisea flaccida (Suhr) Papenfuss. Four known compounds and one new halogenated monoterpene, (2E,5E,7Z)-8-chloro- 7-(dichloromethyl)-4-hydroxy-3-methylocta-2,5,7-trienal, were isolated from Plocamium rigidum. The breast cancer (MCF-7 cell line) inhibitory activity for these compounds was assessed and it was observed that an increase in the lipophilic nature of the compounds produced more favourable IC50 values. A pre-cursor to bromofucin type compounds, cis-laurencenyne, was isolated from Laurencia natalensis, as well as a new acetoxy chamigrane type compound, 4-bromo- 3,10-dichloro-7-hydroxy-3,7,11,11-tetramethylspiro [6.6] undec-1-yl acetate. Delisea flaccida was seen to contain two known bromofuranone type compounds isolated as an isomeric mixture, 1-[(5Z)-4-bromo-5-(bromomethylidene)-2-oxo-2,5- dihydrofuran-3-yl] butyl acetate and 1-[(5E)-4-bromo-5-(bromomethylidene)-2- oxo-2,5-dihydrofuran-3-yl]butyl acetate. These compounds are famous for their ability to inhibit bacterial biofilm production and they have been isolated before from an Australian Delisea spp , Adobe Acrobat 9.53 Paper Capture Plug-in
- Full Text:
- Date Issued: 2013
Trade union responses to the casualisation of labour in the Eastern Cape
- Authors: Loni, Kholosa Siphe
- Date: 2013 , 2013-04-23
- Subjects: Labor unions -- Research -- South Africa -- Eastern Cape Casual labor -- Research -- South Africa -- Eastern Cape Precarious employment -- Research -- South Africa -- Eastern Cape Temporary employees -- Legal status, laws, etc. -- Research -- South Africa Industrial relations -- South Africa -- Eastern Cape Labor and globalization
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3286 , http://hdl.handle.net/10962/d1003056
- Description: This thesis focuses on trade union responses to casualisation of labour in the Eastern Cape. In the context of increased globalization, some employers have attempted to achieve high production outputs while saving on operational costs. The ‘flexible firm’ model is used as but one theory to explain increased flexibility in the workplace. In an effort to achieve increasingly flexible firms that may swiftly respond to subsequent challenges such as increased international competition, employers have been seen incorporating more non-standard workers in the form of casual, temporary, part-time, and seasonal workers. This has been a matter of concern for the unions for numerous reasons: some nonstandard workers are subjected to sub-standard working conditions, irregular working hours and little or no benefits; casual work is arranged in such a way that it is virtually impossible for these workers to join a union – a predicament which bears a high possibility of a decline in the typically standard worker–based membership of trade unions; and non-standard workers are often faced with the representation gap predicament which entails that they are not adequately protected by labour legislation. The thesis explores the responses of trade unions to these challenges, and the proposals that they have made in this regard, by focusing on the sectoral dynamics of non-standard labour in the province. It further discusses the regulation of non-standard labour, as poor representation of some non-standard workers bears consequences for the regulation of the practice of non-standard work. The research adopted qualitative research techniques in the form of semi-structured interviews, and used purposive and snowball sampling in accessing relevant data for analysis purposes.
- Full Text:
- Date Issued: 2013
- Authors: Loni, Kholosa Siphe
- Date: 2013 , 2013-04-23
- Subjects: Labor unions -- Research -- South Africa -- Eastern Cape Casual labor -- Research -- South Africa -- Eastern Cape Precarious employment -- Research -- South Africa -- Eastern Cape Temporary employees -- Legal status, laws, etc. -- Research -- South Africa Industrial relations -- South Africa -- Eastern Cape Labor and globalization
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3286 , http://hdl.handle.net/10962/d1003056
- Description: This thesis focuses on trade union responses to casualisation of labour in the Eastern Cape. In the context of increased globalization, some employers have attempted to achieve high production outputs while saving on operational costs. The ‘flexible firm’ model is used as but one theory to explain increased flexibility in the workplace. In an effort to achieve increasingly flexible firms that may swiftly respond to subsequent challenges such as increased international competition, employers have been seen incorporating more non-standard workers in the form of casual, temporary, part-time, and seasonal workers. This has been a matter of concern for the unions for numerous reasons: some nonstandard workers are subjected to sub-standard working conditions, irregular working hours and little or no benefits; casual work is arranged in such a way that it is virtually impossible for these workers to join a union – a predicament which bears a high possibility of a decline in the typically standard worker–based membership of trade unions; and non-standard workers are often faced with the representation gap predicament which entails that they are not adequately protected by labour legislation. The thesis explores the responses of trade unions to these challenges, and the proposals that they have made in this regard, by focusing on the sectoral dynamics of non-standard labour in the province. It further discusses the regulation of non-standard labour, as poor representation of some non-standard workers bears consequences for the regulation of the practice of non-standard work. The research adopted qualitative research techniques in the form of semi-structured interviews, and used purposive and snowball sampling in accessing relevant data for analysis purposes.
- Full Text:
- Date Issued: 2013
The relationship between customer satisfaction and revenue: an empirical study within the corporate banking division of a South African bank
- Authors: Richter, Leonie
- Date: 2013
- Subjects: Banks and banking -- Customer services -- South Africa Banks and banking -- South Africa -- Accounting Consumer satisfaction -- South Africa Financial services industry -- South Africa Revenue -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:802 , http://hdl.handle.net/10962/d1006169
- Description: This is a quantitative study which explores whether there is a positive relationship between customer satisfaction as perceived by corporate customers and revenue generated from such customers of the corporate division of a single South African bank. This research report has three sections, namely the (1) academic paper which comprises a condensed literature review, research methods, results and discussion, (2) an expanded literature review, and (3) an expanded research methodology. Although these three sections are interrelated, they may be considered stand-alone documents. A review of literature contends that customer satisfaction has been a topic of interest for over four decades when, in 1965, the concept was first introduced to literature by Cardozo. Even in these early stages it was hypothesized that higher customer satisfaction would lead to repeat purchasing and cross selling. Thus, for some time, researchers have proposed that a link exists between customer satisfaction and a company’s bottom line, ultimately alluding to the notion of positive associations between customer satisfaction, revenue and profitability. The corporate banking division of a South African bank has dedicated significant time and economic resources to monitoring and improving the satisfaction of their corporate customers each year. With a focus on this single corporate banking division, this quantitative study used secondary customer satisfaction data to establish whether a positive relationship between customer satisfaction with a bank representative or more formally termed, the ‘transactional banker’ (TB) and revenue at an account level exists. The study used a one-dimensional customer satisfaction construct summated from several variables or a one-dimensional multi item scale. This quantitative study made use of secondary data obtained through customer satisfaction surveys conducted with the division’s clients in three waves during September 2010, March 2011 and September 2011. At the time of data collection, telephone interviews were conducted with individuals in corporations who were customers of the corporate division within the bank. These individuals in their respective corporations were identified and surveyed because they (a) managed the primary relationship of the corporation with the banking division and (b) were senior financial decision makers of their organization’s (i.e. had the ability to influence a decision to change banks). Sample sizes of 273 (September 2010), 259 (March 2011) and 310 (September 2011) individual corporate customers were achieved through a method of stratified sampling. In this study, customers were stratified according to the TB who is responsible for their account. Within each stratum a random sample of 10 – 15 participants were included for each of the 30 TB’s. Monthly revenue data, recorded as a) credit revenue, b) overdraft revenue and c) total revenue was sourced from internal company records for each month from September 2010 to January 2012. Pearson’s correlation coefficient was used to assess whether a positive correlation between the two variables of customer satisfaction and revenue exists. This was followed by Ordinary Least Square Regression to investigate the magnitude and nature of the relationship between customer satisfaction and revenue using customer satisfaction as the independent variable and revenue as the response variable. Cronbach’s alpha was also used for internal scale validity. The results of the research indicated no statistically significant relationship between a customer’s satisfaction with the performance of their TB and either the credit, overdraft or total revenue generated from such a customer through their account. By highlighting this, these findings, nevertheless, contribute to the growing body of knowledge examining the impact of customer satisfaction efforts on revenue. On the basis of the findings of this study, it cannot be practically recommended that customer satisfaction efforts be terminated or changed within the organization of study owing to several study limitations which were present. Firstly, the study was hampered by small sample sizes due to a lack of the availability of revenue data in some instances, particularly in the case of overdraft revenue. Secondly, the study only focused on a single bank account held with the bank and increases and decreases in revenue based on the balances held within that single account. Since one of the purported consequences of improved customer satisfaction is the purchase of additional products, the current design of the study does not take into account the take up of additional accounts or banking products with the bank. Thus, an increase in revenue for the bank as a whole due to the purchase of additional accounts may be masked. Similarly, the scope of the study does not extend to examining the effect of recommendations made by these corporate customers to others and hence growth of divisional or bank revenue due to the addition of new customers. Finally, this quantitative study does not examine revenue growth when compared to customer satisfaction improvements over time due to a limited sample of customers taking part in the study over a number of periods as well as incomplete revenue data. The recommendations for future research are to examine the relationship between changes in customer satisfaction and changes in revenue at divisional level in the long run within the South African banking industry as the impact of an increase in customer satisfaction may be obscured by salient factors in the short run. It is also suggested that future research look at the correlation between dissatisfaction and revenue, where adequate sample sizes are available. Theoretically, the results of this research do bring into serious question the universal application, especially in the context of the South African banking industry of the Service Profit Chain and Satisfaction Profit Chain which propagate the existence of a positive relationship between customer satisfaction and revenue.
- Full Text:
- Date Issued: 2013
- Authors: Richter, Leonie
- Date: 2013
- Subjects: Banks and banking -- Customer services -- South Africa Banks and banking -- South Africa -- Accounting Consumer satisfaction -- South Africa Financial services industry -- South Africa Revenue -- Research -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:802 , http://hdl.handle.net/10962/d1006169
- Description: This is a quantitative study which explores whether there is a positive relationship between customer satisfaction as perceived by corporate customers and revenue generated from such customers of the corporate division of a single South African bank. This research report has three sections, namely the (1) academic paper which comprises a condensed literature review, research methods, results and discussion, (2) an expanded literature review, and (3) an expanded research methodology. Although these three sections are interrelated, they may be considered stand-alone documents. A review of literature contends that customer satisfaction has been a topic of interest for over four decades when, in 1965, the concept was first introduced to literature by Cardozo. Even in these early stages it was hypothesized that higher customer satisfaction would lead to repeat purchasing and cross selling. Thus, for some time, researchers have proposed that a link exists between customer satisfaction and a company’s bottom line, ultimately alluding to the notion of positive associations between customer satisfaction, revenue and profitability. The corporate banking division of a South African bank has dedicated significant time and economic resources to monitoring and improving the satisfaction of their corporate customers each year. With a focus on this single corporate banking division, this quantitative study used secondary customer satisfaction data to establish whether a positive relationship between customer satisfaction with a bank representative or more formally termed, the ‘transactional banker’ (TB) and revenue at an account level exists. The study used a one-dimensional customer satisfaction construct summated from several variables or a one-dimensional multi item scale. This quantitative study made use of secondary data obtained through customer satisfaction surveys conducted with the division’s clients in three waves during September 2010, March 2011 and September 2011. At the time of data collection, telephone interviews were conducted with individuals in corporations who were customers of the corporate division within the bank. These individuals in their respective corporations were identified and surveyed because they (a) managed the primary relationship of the corporation with the banking division and (b) were senior financial decision makers of their organization’s (i.e. had the ability to influence a decision to change banks). Sample sizes of 273 (September 2010), 259 (March 2011) and 310 (September 2011) individual corporate customers were achieved through a method of stratified sampling. In this study, customers were stratified according to the TB who is responsible for their account. Within each stratum a random sample of 10 – 15 participants were included for each of the 30 TB’s. Monthly revenue data, recorded as a) credit revenue, b) overdraft revenue and c) total revenue was sourced from internal company records for each month from September 2010 to January 2012. Pearson’s correlation coefficient was used to assess whether a positive correlation between the two variables of customer satisfaction and revenue exists. This was followed by Ordinary Least Square Regression to investigate the magnitude and nature of the relationship between customer satisfaction and revenue using customer satisfaction as the independent variable and revenue as the response variable. Cronbach’s alpha was also used for internal scale validity. The results of the research indicated no statistically significant relationship between a customer’s satisfaction with the performance of their TB and either the credit, overdraft or total revenue generated from such a customer through their account. By highlighting this, these findings, nevertheless, contribute to the growing body of knowledge examining the impact of customer satisfaction efforts on revenue. On the basis of the findings of this study, it cannot be practically recommended that customer satisfaction efforts be terminated or changed within the organization of study owing to several study limitations which were present. Firstly, the study was hampered by small sample sizes due to a lack of the availability of revenue data in some instances, particularly in the case of overdraft revenue. Secondly, the study only focused on a single bank account held with the bank and increases and decreases in revenue based on the balances held within that single account. Since one of the purported consequences of improved customer satisfaction is the purchase of additional products, the current design of the study does not take into account the take up of additional accounts or banking products with the bank. Thus, an increase in revenue for the bank as a whole due to the purchase of additional accounts may be masked. Similarly, the scope of the study does not extend to examining the effect of recommendations made by these corporate customers to others and hence growth of divisional or bank revenue due to the addition of new customers. Finally, this quantitative study does not examine revenue growth when compared to customer satisfaction improvements over time due to a limited sample of customers taking part in the study over a number of periods as well as incomplete revenue data. The recommendations for future research are to examine the relationship between changes in customer satisfaction and changes in revenue at divisional level in the long run within the South African banking industry as the impact of an increase in customer satisfaction may be obscured by salient factors in the short run. It is also suggested that future research look at the correlation between dissatisfaction and revenue, where adequate sample sizes are available. Theoretically, the results of this research do bring into serious question the universal application, especially in the context of the South African banking industry of the Service Profit Chain and Satisfaction Profit Chain which propagate the existence of a positive relationship between customer satisfaction and revenue.
- Full Text:
- Date Issued: 2013
An investigation on how learners may use multiple representations in a social interaction to promote learning of percentages and fractions: a case study
- Authors: Ngola-Kazumba, Maria
- Date: 2013
- Subjects: Fractions -- Study and teaching (Secondary) -- Namibia -- Case studies Percentage -- Study and teaching (Secondary) -- Namibia -- Case studies Mathematical notation -- Study and teaching (Secondary) -- Namibia Mathematics -- Study and teaching (Secondary) -- Namibia Experiential learning -- Namibia Education, Secondary -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1890 , http://hdl.handle.net/10962/d1006057
- Description: The study examined the use of multiple representations such as the real world, written symbols, spoken symbols, diagrams and manipulatives by learners to promote the learning of percentages and fractions through social interaction. This investigation was carried out through a teaching and learning programme which was developed and implemented by me, the researcher. The effect of the implemented programme was the main focus of the research. The qualitative study was oriented in the interpretive paradigm – a paradigm that seeks to understand the meaning attached to human actions. Twenty learners participated in the implementation of the programme and 9 learners were selected for focus group interviews. The purpose of the interviews was to explore learners' understanding and feelings about the use of multiple representations in the learning of percentages and fractions through social interactions. The other tools employed in this study were pre-and-post diagnostic tests, observations, learners' work and a journal. The pre-test was used to determine learners' prior knowledge for the program design and implementation, while the post-test and learners' work were used to analyze the effect of the programme. Observations were used to investigate how multiple representations promoted or did not promote the learning of percentages and fractions. The teacher's journal was to record and reflect on any relevant information gathered on each lesson observed. The data shows that the effective use of multiple representations helped learners learn the concept of percentages and fractions better. Learners were able to look at representations in useful ways; multiple representations made some aspects of the concept clear; and multiple representations enabled learners to correct errors. Through the interaction between the teacher and learners, the following was found: all the learners changed words to change focus; learners made links between multiple representations; the learners deepened their concepts of percentages and fractions; learners could convert between fractions using multiple representations; learners could work out percentages of a quantity; and learners could express one quantity as a percentage of another. Furthermore, through the interaction between learners and learners all learners could identify more equivalent fractions of an initial fraction which was given to them; and they could increase and decrease a quantity by a given percentage. On the basis of this research, it can be concluded that the programme promoted the learning of percentages and fractions through three effective methodologies. The first methodology consisted of the effective use of multiple representations; the second methodology concerned the interaction between the teacher and learner during the learning process and the last methodology related to the interaction between the learners - interactions that were not strongly mediated by the teacher. I would recommend that teachers use these three effective approaches when teaching percentages and fractions to promote the learning of the concepts.
- Full Text:
- Date Issued: 2013
- Authors: Ngola-Kazumba, Maria
- Date: 2013
- Subjects: Fractions -- Study and teaching (Secondary) -- Namibia -- Case studies Percentage -- Study and teaching (Secondary) -- Namibia -- Case studies Mathematical notation -- Study and teaching (Secondary) -- Namibia Mathematics -- Study and teaching (Secondary) -- Namibia Experiential learning -- Namibia Education, Secondary -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1890 , http://hdl.handle.net/10962/d1006057
- Description: The study examined the use of multiple representations such as the real world, written symbols, spoken symbols, diagrams and manipulatives by learners to promote the learning of percentages and fractions through social interaction. This investigation was carried out through a teaching and learning programme which was developed and implemented by me, the researcher. The effect of the implemented programme was the main focus of the research. The qualitative study was oriented in the interpretive paradigm – a paradigm that seeks to understand the meaning attached to human actions. Twenty learners participated in the implementation of the programme and 9 learners were selected for focus group interviews. The purpose of the interviews was to explore learners' understanding and feelings about the use of multiple representations in the learning of percentages and fractions through social interactions. The other tools employed in this study were pre-and-post diagnostic tests, observations, learners' work and a journal. The pre-test was used to determine learners' prior knowledge for the program design and implementation, while the post-test and learners' work were used to analyze the effect of the programme. Observations were used to investigate how multiple representations promoted or did not promote the learning of percentages and fractions. The teacher's journal was to record and reflect on any relevant information gathered on each lesson observed. The data shows that the effective use of multiple representations helped learners learn the concept of percentages and fractions better. Learners were able to look at representations in useful ways; multiple representations made some aspects of the concept clear; and multiple representations enabled learners to correct errors. Through the interaction between the teacher and learners, the following was found: all the learners changed words to change focus; learners made links between multiple representations; the learners deepened their concepts of percentages and fractions; learners could convert between fractions using multiple representations; learners could work out percentages of a quantity; and learners could express one quantity as a percentage of another. Furthermore, through the interaction between learners and learners all learners could identify more equivalent fractions of an initial fraction which was given to them; and they could increase and decrease a quantity by a given percentage. On the basis of this research, it can be concluded that the programme promoted the learning of percentages and fractions through three effective methodologies. The first methodology consisted of the effective use of multiple representations; the second methodology concerned the interaction between the teacher and learner during the learning process and the last methodology related to the interaction between the learners - interactions that were not strongly mediated by the teacher. I would recommend that teachers use these three effective approaches when teaching percentages and fractions to promote the learning of the concepts.
- Full Text:
- Date Issued: 2013
Polymer based electrospun nanofibers as diagnostic probes for the detection of toxic metal ions in water
- Authors: Ondigo, Dezzline Adhiambo
- Date: 2013
- Subjects: Heavy metals , Nanofibers , Nanoparticles , Colorimetric analysis
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4557 , http://hdl.handle.net/10962/d1018261
- Description: The thesis presents the development of polymer based electrospun nanofibers as diagnostic probes for the selective detection of toxic metal ions in water. Through modification of the chemical characteristics of nanofibers by pre- and post-electrospinning treatments, three different diagnostic probes were successfully developed. These were the fluorescent pyridylazo-2-naphthol-poly(acrylic acid) nanofiber probe, the colorimetric probe based on glutathione-stabilized silver/copper alloy nanoparticles and the colorimetric probe based on 2-(2’-Pyridyl)-imidazole functionalized nanofibers. The probes were characterized by Fourier transform infrared spectroscopy (FTIR), Energy dispersive x-ray spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The fluorescent nanofiber probe was developed towards the determination of Ni²⁺. Covalently functionalized pyridylazo-2-naphthol-poly(acrylic acid) polymeric nanofibers were employed. The solid state Ni²⁺ probe exhibited a good correlation between the fluorescence intensity and nickel concentration up to 1.0 mg/mL based on the Stern-Volmer mechanism. The detection limit of the nanofiber probe was found to be 0.07 ng/mL. The versatility of the fluorescent probe was demonstrated by affording a simple, rapid and selective detection of Ni²⁺ in the presence of other competing metal ions by direct analysis without employing any sample handling steps. For the second part of the study, a simple strategy based on the in-situ synthesis of the glutathione stabilized silver/copper alloy nanoparticles (Ag/Cu alloy NPs) in nylon 6 provided a fast procedure for fabricating a colorimetric probe for the detection of Ni²⁺ in water samples. The electrospun nanofiber composites responded to Ni²⁺ ions but did not suffer any interference from the other metal ions. The effect of Ni²⁺ concentration on the nanocomposite fibers was considered and the “eye-ball” limit of detection was found to be 5.8 μg/mL. Lastly, the third probe was developed by covalently linking an imidazole derivative; 2-(2′-Pyridyl)-imidazole (PIMH) to Poly(vinylbenzyl chloride) (PVBC) and nylon 6 nanofibers by post-electrospinning treatments using a wet chemical method and graft copolymerization technique, respectively. The post-electrospinning modifications of the nanofibers were achieved without altering their fibrous morphology. The color change to red-orange in the presence of Fe²⁺ for both the grafted nylon 6 (white) and the chemically modified PVBC (yellow) nanofibers was instantaneous. The developed diagnostic probes exhibited the desired selectivity towards the targeted metal ions.
- Full Text:
- Date Issued: 2013
- Authors: Ondigo, Dezzline Adhiambo
- Date: 2013
- Subjects: Heavy metals , Nanofibers , Nanoparticles , Colorimetric analysis
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4557 , http://hdl.handle.net/10962/d1018261
- Description: The thesis presents the development of polymer based electrospun nanofibers as diagnostic probes for the selective detection of toxic metal ions in water. Through modification of the chemical characteristics of nanofibers by pre- and post-electrospinning treatments, three different diagnostic probes were successfully developed. These were the fluorescent pyridylazo-2-naphthol-poly(acrylic acid) nanofiber probe, the colorimetric probe based on glutathione-stabilized silver/copper alloy nanoparticles and the colorimetric probe based on 2-(2’-Pyridyl)-imidazole functionalized nanofibers. The probes were characterized by Fourier transform infrared spectroscopy (FTIR), Energy dispersive x-ray spectroscopy (EDX), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The fluorescent nanofiber probe was developed towards the determination of Ni²⁺. Covalently functionalized pyridylazo-2-naphthol-poly(acrylic acid) polymeric nanofibers were employed. The solid state Ni²⁺ probe exhibited a good correlation between the fluorescence intensity and nickel concentration up to 1.0 mg/mL based on the Stern-Volmer mechanism. The detection limit of the nanofiber probe was found to be 0.07 ng/mL. The versatility of the fluorescent probe was demonstrated by affording a simple, rapid and selective detection of Ni²⁺ in the presence of other competing metal ions by direct analysis without employing any sample handling steps. For the second part of the study, a simple strategy based on the in-situ synthesis of the glutathione stabilized silver/copper alloy nanoparticles (Ag/Cu alloy NPs) in nylon 6 provided a fast procedure for fabricating a colorimetric probe for the detection of Ni²⁺ in water samples. The electrospun nanofiber composites responded to Ni²⁺ ions but did not suffer any interference from the other metal ions. The effect of Ni²⁺ concentration on the nanocomposite fibers was considered and the “eye-ball” limit of detection was found to be 5.8 μg/mL. Lastly, the third probe was developed by covalently linking an imidazole derivative; 2-(2′-Pyridyl)-imidazole (PIMH) to Poly(vinylbenzyl chloride) (PVBC) and nylon 6 nanofibers by post-electrospinning treatments using a wet chemical method and graft copolymerization technique, respectively. The post-electrospinning modifications of the nanofibers were achieved without altering their fibrous morphology. The color change to red-orange in the presence of Fe²⁺ for both the grafted nylon 6 (white) and the chemically modified PVBC (yellow) nanofibers was instantaneous. The developed diagnostic probes exhibited the desired selectivity towards the targeted metal ions.
- Full Text:
- Date Issued: 2013
The talisman
- Authors: Reed, Graham Conan
- Date: 2013
- Subjects: Fiction , Short stories , English , South Africa , Creative writing (Higher education) , Short stories, South African (English) -- 21st century , South African fiction (English) -- 21st century , English language -- Writing
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:5967 , http://hdl.handle.net/10962/d1001817
- Description: The Talisman is an adventure story set in a future where much of today's cultural memory and technology has been lost. Following a hunting accident, a young man named Forest survives a life-threatening wound and embarks on a quest for knowledge. Rising sea levels, bands of marauders, wild animals and the perils of survival in the broken world are not the only problems facing the survivors. The nature of the collapse of the society, what triggered it and its subsequent unfolding, bequeaths an existential quandary upon them that only Forest, and a rare text as old as the earth itself, can unravel
- Full Text:
- Date Issued: 2013
- Authors: Reed, Graham Conan
- Date: 2013
- Subjects: Fiction , Short stories , English , South Africa , Creative writing (Higher education) , Short stories, South African (English) -- 21st century , South African fiction (English) -- 21st century , English language -- Writing
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:5967 , http://hdl.handle.net/10962/d1001817
- Description: The Talisman is an adventure story set in a future where much of today's cultural memory and technology has been lost. Following a hunting accident, a young man named Forest survives a life-threatening wound and embarks on a quest for knowledge. Rising sea levels, bands of marauders, wild animals and the perils of survival in the broken world are not the only problems facing the survivors. The nature of the collapse of the society, what triggered it and its subsequent unfolding, bequeaths an existential quandary upon them that only Forest, and a rare text as old as the earth itself, can unravel
- Full Text:
- Date Issued: 2013
Gravitational wave astronomy: a new window to the cosmos a new window to the cosmos
- Authors: Bishop, Nigel T
- Date: 2013
- Language: English
- Type: Text
- Identifier: vital:581 , http://hdl.handle.net/10962/d1018923
- Description: [Introduction] Since recorded history began, humankind has wondered about, and tried to understand, the Universe. Until about 400 years ago, the only tool available was the naked eye. In 1609 Galileo applied the new invention of the telescope to astronomy, and so opened a window to the cosmos. This window has been getting wider and clearer with every technological improvement. But always the medium bringing information about the Universe has been light, because radio waves, X-rays, gamma-rays etc. are light at different energies, or in other words different colours of light. But that is about to change. In a few years time we will have measured gravitational waves, and so will have opened a new window to the cosmos. And that window is very different to the one open to light in its various forms, because these are all emitted from the surface of an astronomical body. Gravitational waves are caused by the relative motion of matter, and as such are generated primarily in the deep interior of the body.
- Full Text:
- Date Issued: 2013
- Authors: Bishop, Nigel T
- Date: 2013
- Language: English
- Type: Text
- Identifier: vital:581 , http://hdl.handle.net/10962/d1018923
- Description: [Introduction] Since recorded history began, humankind has wondered about, and tried to understand, the Universe. Until about 400 years ago, the only tool available was the naked eye. In 1609 Galileo applied the new invention of the telescope to astronomy, and so opened a window to the cosmos. This window has been getting wider and clearer with every technological improvement. But always the medium bringing information about the Universe has been light, because radio waves, X-rays, gamma-rays etc. are light at different energies, or in other words different colours of light. But that is about to change. In a few years time we will have measured gravitational waves, and so will have opened a new window to the cosmos. And that window is very different to the one open to light in its various forms, because these are all emitted from the surface of an astronomical body. Gravitational waves are caused by the relative motion of matter, and as such are generated primarily in the deep interior of the body.
- Full Text:
- Date Issued: 2013
An exploration of natural science teachers' experiences and perceptions of the National Standardised Achievement Tests : a case study
- Shaakumeni, Simson Ndadaleka
- Authors: Shaakumeni, Simson Ndadaleka
- Date: 2013
- Subjects: Achievement tests -- Education (Elementary) -- Research -- Namibia Educational tests and measurements -- Research -- Namibia Educational tests and measurements -- Research -- Namibia Science -- Study and teaching (Elementary) -- Namibia Science teachers -- Namibia Education, Elementary -- Standards -- Research -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1390 , http://hdl.handle.net/10962/d1001670
- Description: The primary purpose of this study was to capture Natural Science teachers’ perceptions of the national standardised achievement tests (SATs), with a view to illuminating whether or not they were able to interpret and use the SATs reports to inform their practice and for improvement purposes as envisaged in the standardised tests’ objectives. It further sought to investigate how the grade 7 Natural Science teachers were teaching the subject matter, with a view to understanding the performance of learners as illustrated in the 2010 SATs results. The study mainly used qualitative methods such as observations, interviews and document analysis. These were complemented by quantitative methods through the use of the questionnaires, which were used to capture the general perceptions and experiences of Natural Science teachers. Thirty-five questionnaires were sent out and ten responses were received. Quantitative data from the questionnaires were analysed by tabulation to ascertain the frequencies of responses regarding teachers’ perceptions and experiences of SATs, as indicated in different scales per indicator. Furthermore, data generated through video-taped lessons, analysis of learners’ written notes, interviews and open-ended questions from the questionnaires were inductively analyzed. The findings of the study revealed that teachers had positive perceptions towards the ideals of SATs. However, their use of the SATs reports in their teaching was inconclusive. The study also revealed that there were no policy imperatives on SATs, in particular, to guide their use in schools. It was also found that teachers were not teaching the syllabus competencies fully and their Natural Science content knowledge was inadequate. The principal recommendation is that teachers need to acquaint themselves sufficiently with the SATs reports to enable them to use the reports for their intended purposes. Furthermore, teachers need to engage in continuous professional development programmes to improve their Natural Science content knowledge, especially with regard to making information in the textbooks accessible to learners in terms of addressing competencies in the syllabus. Finally, there is a need for policy intervention from the Ministry of Education in Namibia so that the existing tensions between policy formulation and implementation are addressed.
- Full Text:
- Date Issued: 2013
- Authors: Shaakumeni, Simson Ndadaleka
- Date: 2013
- Subjects: Achievement tests -- Education (Elementary) -- Research -- Namibia Educational tests and measurements -- Research -- Namibia Educational tests and measurements -- Research -- Namibia Science -- Study and teaching (Elementary) -- Namibia Science teachers -- Namibia Education, Elementary -- Standards -- Research -- Namibia
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1390 , http://hdl.handle.net/10962/d1001670
- Description: The primary purpose of this study was to capture Natural Science teachers’ perceptions of the national standardised achievement tests (SATs), with a view to illuminating whether or not they were able to interpret and use the SATs reports to inform their practice and for improvement purposes as envisaged in the standardised tests’ objectives. It further sought to investigate how the grade 7 Natural Science teachers were teaching the subject matter, with a view to understanding the performance of learners as illustrated in the 2010 SATs results. The study mainly used qualitative methods such as observations, interviews and document analysis. These were complemented by quantitative methods through the use of the questionnaires, which were used to capture the general perceptions and experiences of Natural Science teachers. Thirty-five questionnaires were sent out and ten responses were received. Quantitative data from the questionnaires were analysed by tabulation to ascertain the frequencies of responses regarding teachers’ perceptions and experiences of SATs, as indicated in different scales per indicator. Furthermore, data generated through video-taped lessons, analysis of learners’ written notes, interviews and open-ended questions from the questionnaires were inductively analyzed. The findings of the study revealed that teachers had positive perceptions towards the ideals of SATs. However, their use of the SATs reports in their teaching was inconclusive. The study also revealed that there were no policy imperatives on SATs, in particular, to guide their use in schools. It was also found that teachers were not teaching the syllabus competencies fully and their Natural Science content knowledge was inadequate. The principal recommendation is that teachers need to acquaint themselves sufficiently with the SATs reports to enable them to use the reports for their intended purposes. Furthermore, teachers need to engage in continuous professional development programmes to improve their Natural Science content knowledge, especially with regard to making information in the textbooks accessible to learners in terms of addressing competencies in the syllabus. Finally, there is a need for policy intervention from the Ministry of Education in Namibia so that the existing tensions between policy formulation and implementation are addressed.
- Full Text:
- Date Issued: 2013
Performance management of veterinarians : a case study of veterinary services in the Eastern Cape
- Authors: Mutero, Gabriel
- Date: 2013
- Subjects: Performance management Veterinarians -- South Africa -- Rating of
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:719 , http://hdl.handle.net/10962/d1001873
- Description: In recent years, challenging economic conditions have stressed organizations, some to breaking point. Rather than waiting for external improvements, such as market growth or technological advances, many organizations are looking internally for performance and productivity gains (Boxall and Purcell, 2003). Consequently, the concept of performance management is receiving increased attention as a route to improved results and organisational growth (Boxall and Purcell, 2003). Likewise, increasing public pressure on governments to improve service delivery and account for the public purse have also forced many governments worldwide to implement a performance management system in one form or another (Ohemeng, 2009; Cameron and Sewell, 2003; Williams, 2005; Sehested, 2008). The South African Public Service has undergone much transformation since 2000. The transformation has been motivated by the Government’s realisation that, as with governments throughout the world, there is a need to modernise and professionalise all spheres of Government. The guiding principles for this transformation are contained in the White Paper on the Transformation of the Public Service (1995) and the Batho Pele White Paper (1997). This has informed the Public Service Act: Act 32 of 2000 of which stipulates that public service organisations should have a performance management system to promote a culture of performance management amongst all staff. The performance management system must ensure that the public service administers its affairs in an economical, effective, efficient and accountable manner. Whereas performance management systems have been in existence in some parts of the world since the early 1970s (Armstrong and Baron, 2005), in the Eastern Cape Provincial Government (ECPG) the Performance Management and Development System (PMDS) can be considered to still be in its infancy stage. It was introduced slightly over a decade ago, with the objective of managing performance in a consultative, supportive and non-discriminatory manner (ECPG, 2001). The PMDS also aims to provide clarity to all employees on their role in the achievement of departmental and provincial goals. This was anticipated to result in enhanced organisational efficiency and effectiveness, accountability for the use of resources and the achievement of results (ECPG, 2001). 4 A literature review contained in this research indicates that internationally and locally, implementing performance management systems is beset with challenges such as conflicting interests between different groups such as professionals wanting autonomy, organisational culture, poor implementation, lack of capacity and resources, lack of institutional and leadership support, changing workplace environments and many others. However it has also been shown that performance management systems are one way of ensuring that employees are focused, goals are met and organisation move forward toward meeting their mission. This research, which has been grounded within a post positivist paradigm, describes the impact of the PMDS on veterinarians in their professional conduct. Semi-structured interviews were conducted with ten veterinarians within the Department, culminating in a total of seven and a half hours of interviewing time. The findings of this study were that the PMDS was minimally effective in achieving organisational goals and mission because of several reasons such as inconsistency in application, perceived unfairness, a lack of ownership of the system amongst workers and management, a lack of involvement, a dichotomy between policy and actual practice, geographical remoteness of subordinates resulting in dilution of information and influence, lack of resources and finally, the type and validity of indicators used. A significant finding was that having a non-veterinarian as a supervisor, impacted negatively on professional conduct. This was perceived to affect planning and goal setting, review and feedback discussions, as well as career advancement. The research ends with recommendations for practice and further research such as exploring management of professionals in multidisciplinary organisations. This research paper is organised and presented in three sections; the first section is in the format of an academic paper, and in addition to a concise review of the literature, will detail the findings, their discussion and conclusion. The second section contains a more expanded literature review of performance management of professionals and the third and last section describes and justifies the design of the study and how it was conducted.
- Full Text:
- Date Issued: 2013
- Authors: Mutero, Gabriel
- Date: 2013
- Subjects: Performance management Veterinarians -- South Africa -- Rating of
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:719 , http://hdl.handle.net/10962/d1001873
- Description: In recent years, challenging economic conditions have stressed organizations, some to breaking point. Rather than waiting for external improvements, such as market growth or technological advances, many organizations are looking internally for performance and productivity gains (Boxall and Purcell, 2003). Consequently, the concept of performance management is receiving increased attention as a route to improved results and organisational growth (Boxall and Purcell, 2003). Likewise, increasing public pressure on governments to improve service delivery and account for the public purse have also forced many governments worldwide to implement a performance management system in one form or another (Ohemeng, 2009; Cameron and Sewell, 2003; Williams, 2005; Sehested, 2008). The South African Public Service has undergone much transformation since 2000. The transformation has been motivated by the Government’s realisation that, as with governments throughout the world, there is a need to modernise and professionalise all spheres of Government. The guiding principles for this transformation are contained in the White Paper on the Transformation of the Public Service (1995) and the Batho Pele White Paper (1997). This has informed the Public Service Act: Act 32 of 2000 of which stipulates that public service organisations should have a performance management system to promote a culture of performance management amongst all staff. The performance management system must ensure that the public service administers its affairs in an economical, effective, efficient and accountable manner. Whereas performance management systems have been in existence in some parts of the world since the early 1970s (Armstrong and Baron, 2005), in the Eastern Cape Provincial Government (ECPG) the Performance Management and Development System (PMDS) can be considered to still be in its infancy stage. It was introduced slightly over a decade ago, with the objective of managing performance in a consultative, supportive and non-discriminatory manner (ECPG, 2001). The PMDS also aims to provide clarity to all employees on their role in the achievement of departmental and provincial goals. This was anticipated to result in enhanced organisational efficiency and effectiveness, accountability for the use of resources and the achievement of results (ECPG, 2001). 4 A literature review contained in this research indicates that internationally and locally, implementing performance management systems is beset with challenges such as conflicting interests between different groups such as professionals wanting autonomy, organisational culture, poor implementation, lack of capacity and resources, lack of institutional and leadership support, changing workplace environments and many others. However it has also been shown that performance management systems are one way of ensuring that employees are focused, goals are met and organisation move forward toward meeting their mission. This research, which has been grounded within a post positivist paradigm, describes the impact of the PMDS on veterinarians in their professional conduct. Semi-structured interviews were conducted with ten veterinarians within the Department, culminating in a total of seven and a half hours of interviewing time. The findings of this study were that the PMDS was minimally effective in achieving organisational goals and mission because of several reasons such as inconsistency in application, perceived unfairness, a lack of ownership of the system amongst workers and management, a lack of involvement, a dichotomy between policy and actual practice, geographical remoteness of subordinates resulting in dilution of information and influence, lack of resources and finally, the type and validity of indicators used. A significant finding was that having a non-veterinarian as a supervisor, impacted negatively on professional conduct. This was perceived to affect planning and goal setting, review and feedback discussions, as well as career advancement. The research ends with recommendations for practice and further research such as exploring management of professionals in multidisciplinary organisations. This research paper is organised and presented in three sections; the first section is in the format of an academic paper, and in addition to a concise review of the literature, will detail the findings, their discussion and conclusion. The second section contains a more expanded literature review of performance management of professionals and the third and last section describes and justifies the design of the study and how it was conducted.
- Full Text:
- Date Issued: 2013