Resilience and attachment as mediators impacting upon the psychosocial sequelae of unwanted early sexual experiences
- Defferary,Tanya Elizabeth Michele
- Authors: Defferary,Tanya Elizabeth Michele
- Date: 2016
- Subjects: Resilience (Personality trait) Child sexual abuse , Attachment behaviour , Psychotherapy
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/12494 , vital:27074
- Description: Unwanted early sexual experiences (UESE) are traumatic experiences that many children worldwide are exposed to on a daily basis. Some of these victims struggle to adapt to life, whereas others become survivors, exhibiting post-traumatic growth after such an experience. South Africa has some of the highest UESE prevalence rates in the world, highlighting the importance of research conducted within this field in the country. With an overarching psychofortogenic framework, and through the implementation of a convergent parallel mixed methods research design, the study explored and described whether resilience and attachment act as mediators impacting upon the psychosocial sequelae which a UESE survivor might experience. The study was divided into three phases. Phase 1 consisted of a small-scale survey design which was conducted with 304 participants while Phase 2 consisted of nine semi-structure interviews with UESE survivors, who were volunteers from the original sample. Finally, Phase 3 provided an integrated summary of the findings from the first two phases. During Phase 1 significant findings relating to the survivors of UESE, their levels of resilience and attachment relationships were outlined. Of the total sample, 32.43% males and 30.5% females indicated that they had been exposed to a UESE. Most of the perpetrators were known to the survivors with friends being identified as the most common perpetrators. Parental relationships characterised by trust, open communication and less alienation were found to impact upon the degree to which participants reported being bothered by the UESE. Furthermore, parental alienation at the time of the UESE had a significantly negative impact on the survivors’ adult relationship styles. During Phase 2 a number of themes emerged including the manner of disclosure, reasons for delayed disclosure, relationship to the confidant, confidant’s response to disclosure, effects of the response to disclosure, the impact of the UESE upon the survivor, impact of the UESE on relationships, coping/resilience, advice to professionals, the confidant, and the survivor. The final phase confirmed the research hypothesis that resilience and attachment act as mediating factors impacting upon a variety of psychosocial sequelae which a UESE survivor might experience. Serendipitously, disclosure was found to be a mediating factor, securing a significant role within the study. In conclusion a future intervention titled ‘Post-Traumatic Growth: A UESE model of Disclosure, Resilience and Attachment’, was outlined, based on the study’s findings.
- Full Text:
- Date Issued: 2016
- Authors: Defferary,Tanya Elizabeth Michele
- Date: 2016
- Subjects: Resilience (Personality trait) Child sexual abuse , Attachment behaviour , Psychotherapy
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/12494 , vital:27074
- Description: Unwanted early sexual experiences (UESE) are traumatic experiences that many children worldwide are exposed to on a daily basis. Some of these victims struggle to adapt to life, whereas others become survivors, exhibiting post-traumatic growth after such an experience. South Africa has some of the highest UESE prevalence rates in the world, highlighting the importance of research conducted within this field in the country. With an overarching psychofortogenic framework, and through the implementation of a convergent parallel mixed methods research design, the study explored and described whether resilience and attachment act as mediators impacting upon the psychosocial sequelae which a UESE survivor might experience. The study was divided into three phases. Phase 1 consisted of a small-scale survey design which was conducted with 304 participants while Phase 2 consisted of nine semi-structure interviews with UESE survivors, who were volunteers from the original sample. Finally, Phase 3 provided an integrated summary of the findings from the first two phases. During Phase 1 significant findings relating to the survivors of UESE, their levels of resilience and attachment relationships were outlined. Of the total sample, 32.43% males and 30.5% females indicated that they had been exposed to a UESE. Most of the perpetrators were known to the survivors with friends being identified as the most common perpetrators. Parental relationships characterised by trust, open communication and less alienation were found to impact upon the degree to which participants reported being bothered by the UESE. Furthermore, parental alienation at the time of the UESE had a significantly negative impact on the survivors’ adult relationship styles. During Phase 2 a number of themes emerged including the manner of disclosure, reasons for delayed disclosure, relationship to the confidant, confidant’s response to disclosure, effects of the response to disclosure, the impact of the UESE upon the survivor, impact of the UESE on relationships, coping/resilience, advice to professionals, the confidant, and the survivor. The final phase confirmed the research hypothesis that resilience and attachment act as mediating factors impacting upon a variety of psychosocial sequelae which a UESE survivor might experience. Serendipitously, disclosure was found to be a mediating factor, securing a significant role within the study. In conclusion a future intervention titled ‘Post-Traumatic Growth: A UESE model of Disclosure, Resilience and Attachment’, was outlined, based on the study’s findings.
- Full Text:
- Date Issued: 2016
Standards and indicators for sustainability in South African businesses
- Authors: Janse van Rensburg, Heidi
- Date: 2016
- Subjects: Sustainable development reporting -- South Africa Economic development -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/14334 , vital:27571
- Description: Sustainability reporting is becoming increasingly important, and governments and stock exchanges of many countries require or strongly encourage businesses to provide some level of sustainability reporting. South Africa is one of few emerging market economies and the only country in Africa which show substantial sustainability reporting activities. In South Africa, sustainable development has been recognised at a constitutional and legislative level. Companies listed on the Johannesburg Stock Exchange (JSE) must integrate sustainability reporting with financial reporting, or explain why they are not complying. Establishing a suitable sustainability reporting framework should therefore be part of the strategic integration of sustainability with other aspects of organisational planning and decision-making. This study suggests such a framework of standards and indicators for sustainability reporting in South African businesses, and evaluates it in South African listed companies. Mixed methods research was used in two phases. In phase 1, a critical analysis of the literature produced a framework of standards and indicators to be used as a measure to evaluate sustainability reporting in South Africa. In phase 2, first hand, original data was collected by performing a quantitative content analysis of sustainability reports of 84 companies listed on the Johannesburg stock exchange with the aim to identify standards and indicators that are applied in the content of sustainability reports in South Africa. Quantitative content analysis involves analysing material and then classifying it into various coding units or themes found in the material - it is a systematic way of converting text to numerical variables for quantitative data analysis.
- Full Text:
- Date Issued: 2016
- Authors: Janse van Rensburg, Heidi
- Date: 2016
- Subjects: Sustainable development reporting -- South Africa Economic development -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/14334 , vital:27571
- Description: Sustainability reporting is becoming increasingly important, and governments and stock exchanges of many countries require or strongly encourage businesses to provide some level of sustainability reporting. South Africa is one of few emerging market economies and the only country in Africa which show substantial sustainability reporting activities. In South Africa, sustainable development has been recognised at a constitutional and legislative level. Companies listed on the Johannesburg Stock Exchange (JSE) must integrate sustainability reporting with financial reporting, or explain why they are not complying. Establishing a suitable sustainability reporting framework should therefore be part of the strategic integration of sustainability with other aspects of organisational planning and decision-making. This study suggests such a framework of standards and indicators for sustainability reporting in South African businesses, and evaluates it in South African listed companies. Mixed methods research was used in two phases. In phase 1, a critical analysis of the literature produced a framework of standards and indicators to be used as a measure to evaluate sustainability reporting in South Africa. In phase 2, first hand, original data was collected by performing a quantitative content analysis of sustainability reports of 84 companies listed on the Johannesburg stock exchange with the aim to identify standards and indicators that are applied in the content of sustainability reports in South Africa. Quantitative content analysis involves analysing material and then classifying it into various coding units or themes found in the material - it is a systematic way of converting text to numerical variables for quantitative data analysis.
- Full Text:
- Date Issued: 2016
The development of a counselling intervention for people living HIV and AIDS experiencing stress-related psychological conditions in the Eastern Cape province
- Authors: Twaise, Nomvula Virginia
- Date: 2016
- Subjects: AIDS (Disease) -- Patients -- Counseling of -- South Africa -- Eastern Cape , HIV-positive persons -- Counseling of -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/7927 , vital:24322
- Description: People living with HIV and AIDS (PLHIV) suffer from a number of stress-related psychological disorders. The aim of this study was to develop an integrative intervention, which combined Cognitive Behaviour Therapy (CBT), Body-Mind Therapy and Multicultural perspectives to assist health care workers in identifying and treating stressrelated psychological disorders among people living with HIV and AIDS. The study employed an intervention research design using both qualitative and quantitative methods. The quantitative data was collected from PLHIV attending HIV Counselling and Testing (HCT) and Anti-retroviral therapy clinics in the Buffalo City Municipality (BCM) of the Eastern Cape Province. The qualitative data was collected from the health care workers of the selected study sites. Purposive sampling was used to select the study sample. Instruments used included a biographical questionnaire, the Beck Depression Inventory-II (BDI-II), Medical Outcome Study- HIV (MOS-HIV) and focus group interviews to gather data for the development of an intervention model that would address reported stress-related psychological disorders. Findings showed that people living with HIV and AIDS endure stress in their lives on daily basis rather than episodes of severe or clinical depression. Many of the PLHIV are dealing with a number of psychosocial problems that compromise their quality of life and health status. In conclusion, the study illustratively interpreted and discussed the results in relation to the objectives of the study. The study recommends that PLHIV should be exposed to stress management programmes, and health care workers (HCWs) should be offered training in basic counselling skills, stress management and/or debriefing.
- Full Text:
- Date Issued: 2016
- Authors: Twaise, Nomvula Virginia
- Date: 2016
- Subjects: AIDS (Disease) -- Patients -- Counseling of -- South Africa -- Eastern Cape , HIV-positive persons -- Counseling of -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/7927 , vital:24322
- Description: People living with HIV and AIDS (PLHIV) suffer from a number of stress-related psychological disorders. The aim of this study was to develop an integrative intervention, which combined Cognitive Behaviour Therapy (CBT), Body-Mind Therapy and Multicultural perspectives to assist health care workers in identifying and treating stressrelated psychological disorders among people living with HIV and AIDS. The study employed an intervention research design using both qualitative and quantitative methods. The quantitative data was collected from PLHIV attending HIV Counselling and Testing (HCT) and Anti-retroviral therapy clinics in the Buffalo City Municipality (BCM) of the Eastern Cape Province. The qualitative data was collected from the health care workers of the selected study sites. Purposive sampling was used to select the study sample. Instruments used included a biographical questionnaire, the Beck Depression Inventory-II (BDI-II), Medical Outcome Study- HIV (MOS-HIV) and focus group interviews to gather data for the development of an intervention model that would address reported stress-related psychological disorders. Findings showed that people living with HIV and AIDS endure stress in their lives on daily basis rather than episodes of severe or clinical depression. Many of the PLHIV are dealing with a number of psychosocial problems that compromise their quality of life and health status. In conclusion, the study illustratively interpreted and discussed the results in relation to the objectives of the study. The study recommends that PLHIV should be exposed to stress management programmes, and health care workers (HCWs) should be offered training in basic counselling skills, stress management and/or debriefing.
- Full Text:
- Date Issued: 2016
The effect of Acacia karroo tree density on grass species composition, forage yield and quality in different rainfall regimes in the Eastern Cape, South Africa
- Authors: De Ridder, Cornelius Henry
- Date: 2016
- Subjects: Grasses -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/2858 , vital:20357
- Description: It is widely believed that Acacia karroo Hayne trees compete with and negatively affect the production of grasses in their immediate surroundings. This perception formed as a result of observations by farmers of their veld as well as some research. The complexity of plant interactions in different conditions required that research be done to better explain the extent of grass and tree interactions. In response to this need, the effect of a range of Acacia karroo densities on grass production was tested in areas of differing rainfall. Results emphasize the complexity of such plant interactions but highlight rainfall as influencing the effect of tree density on grass production and grass quality. Study sites were chosen with significant differences in tree density and rainfall and this was found to be concomitant with significant differences in grass yield and crude protein (p < 0.001). Grass yield (mass produced) was negatively correlated with tree density (p < 0.001) and was affected by rainfall. High tree density reduced grass yield at the lower rainfall sites, but a reduction in yield was only recorded during dry conditions in the higher rainfall areas. By contrast, the crude protein content of grasses was positively correlated to tree density (p < 0.001). However, as with yield, rainfall played an important part in the strength of the correlation. Soil properties such as temperature (-) (p = 0.011), phosphorus content (+) (p = 0.006), calcium concentration (+) (p = 0.005), acid saturation (-) (p = 0.018), and soil pH (+) (p = 0.008) were also significantly correlated to tree density. Tree density enriched the soil, subsequently benefitting grass quality. The study sites investigated, had different plant communities and environmental conditions with Cradock, Kubusi Drift and Kei Mouth having unique communities and conditions while Adelaide and Cathcart could not be separated in either. Cradock was the driest site and the vegetation was dominated by both grasses and karroid shrubs, differing in pattern and process from the other sites. The Kubusi Drift site had high tree densities, to the extent that the trees altered the grass species composition. The effects of rainfall on grass yield and quality exceeded that of community composition differences.
- Full Text:
- Date Issued: 2016
- Authors: De Ridder, Cornelius Henry
- Date: 2016
- Subjects: Grasses -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/2858 , vital:20357
- Description: It is widely believed that Acacia karroo Hayne trees compete with and negatively affect the production of grasses in their immediate surroundings. This perception formed as a result of observations by farmers of their veld as well as some research. The complexity of plant interactions in different conditions required that research be done to better explain the extent of grass and tree interactions. In response to this need, the effect of a range of Acacia karroo densities on grass production was tested in areas of differing rainfall. Results emphasize the complexity of such plant interactions but highlight rainfall as influencing the effect of tree density on grass production and grass quality. Study sites were chosen with significant differences in tree density and rainfall and this was found to be concomitant with significant differences in grass yield and crude protein (p < 0.001). Grass yield (mass produced) was negatively correlated with tree density (p < 0.001) and was affected by rainfall. High tree density reduced grass yield at the lower rainfall sites, but a reduction in yield was only recorded during dry conditions in the higher rainfall areas. By contrast, the crude protein content of grasses was positively correlated to tree density (p < 0.001). However, as with yield, rainfall played an important part in the strength of the correlation. Soil properties such as temperature (-) (p = 0.011), phosphorus content (+) (p = 0.006), calcium concentration (+) (p = 0.005), acid saturation (-) (p = 0.018), and soil pH (+) (p = 0.008) were also significantly correlated to tree density. Tree density enriched the soil, subsequently benefitting grass quality. The study sites investigated, had different plant communities and environmental conditions with Cradock, Kubusi Drift and Kei Mouth having unique communities and conditions while Adelaide and Cathcart could not be separated in either. Cradock was the driest site and the vegetation was dominated by both grasses and karroid shrubs, differing in pattern and process from the other sites. The Kubusi Drift site had high tree densities, to the extent that the trees altered the grass species composition. The effects of rainfall on grass yield and quality exceeded that of community composition differences.
- Full Text:
- Date Issued: 2016
The influence of decentralisation on community development in Gasabo district of Rwanda
- Authors: Indoha, Janvier Kimenyi
- Date: 2016
- Subjects: Decentralization in government -- Rwanda Community development -- Rwanda
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/14345 , vital:27572
- Description: This study investigated the influence of decentralisation on community development in the Gasabo district of Rwanda. It was based on the assumption that the participation of citizens in decision-making, planning based on local needs and priorities and the implementation of development programmes associated with the decentralisation policy can improve service delivery and result in community development. It is vital that the decentralization policy be well understood so that appropriate strategies may be adopted and implemented with the aim of maximising advantages associated with it. This study provides, in addition to a literature review, a brief historical background of the evolution and transformation of governance in Rwanda. The country‟s system of governance as well as the challenges it has encountered along the way through different régimes are briefly addressed. Also, the legal and regulatory framework of the decentralization policy and strategies adopted and mechanisms of resource transfer are explained. The study used both qualitative and quantitative methods. Primary and secondary data were used in analysing the influence of decentralisation on community development in the Gasabo district of Rwanda. Primary data was collected through survey questionnaires, interviews and focus group discussions, while secondary data were gathered through a literature survey of relevant textbooks, peer-reviewed journals, reports and legislation. The research findings indicated that in the Gasabo district, decentralisation has contributed significantly towards improving governance aspects such as accountability, and citizen participation in development programmes, which are prerequisite factors of development. Concerning the planning process, the research found that the district development plan (DDP) was crafted through drawing its priorities from the national development plans embedded in the Economic Development and Poverty Reduction Strategies (EDPRS) and Rwanda‟s Vision 2020. However, despite the existence of the Joint Action Development Forum (JADF), created to join the development plans of development partners to the DDP, testimonies from development partners revealed that their relationship with the district is characterised by the lack of frank collaboration, leading to their not being fully associated in the planning process. This research also found that the decentralisation policy has contributed only to a limited extent to the improvement of service delivery in Gasabo district. It was observed that effective service delivery is still hampered by the lack of skilled employees, especially in the areas of education, health and engineering, a budget insufficient for the effective implementation of development projects in such a way as to satisfy the expectations of beneficiaries. In view of the aforementioned findings, the study recommends that the central government intervene in training district tax officers regarding mechanisms and strategies of maximising tax collection to draw sufficient funds to carry out development plans. Through building their capacity, the imbalance between the responsibilities and means allocated for carrying out their achievement can be progressively reduced. Furthermore, to prevent development from taking place in a random manner, district authorities should receive technical support from the central government through linking the local planning process to national poverty reduction efforts. The annual performance contract system needs to be strengthened and monitored to evaluate the implementation of district development plans so as to prevent any kind of poor leadership performance, with the aim of optimising available resources.
- Full Text:
- Date Issued: 2016
- Authors: Indoha, Janvier Kimenyi
- Date: 2016
- Subjects: Decentralization in government -- Rwanda Community development -- Rwanda
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/14345 , vital:27572
- Description: This study investigated the influence of decentralisation on community development in the Gasabo district of Rwanda. It was based on the assumption that the participation of citizens in decision-making, planning based on local needs and priorities and the implementation of development programmes associated with the decentralisation policy can improve service delivery and result in community development. It is vital that the decentralization policy be well understood so that appropriate strategies may be adopted and implemented with the aim of maximising advantages associated with it. This study provides, in addition to a literature review, a brief historical background of the evolution and transformation of governance in Rwanda. The country‟s system of governance as well as the challenges it has encountered along the way through different régimes are briefly addressed. Also, the legal and regulatory framework of the decentralization policy and strategies adopted and mechanisms of resource transfer are explained. The study used both qualitative and quantitative methods. Primary and secondary data were used in analysing the influence of decentralisation on community development in the Gasabo district of Rwanda. Primary data was collected through survey questionnaires, interviews and focus group discussions, while secondary data were gathered through a literature survey of relevant textbooks, peer-reviewed journals, reports and legislation. The research findings indicated that in the Gasabo district, decentralisation has contributed significantly towards improving governance aspects such as accountability, and citizen participation in development programmes, which are prerequisite factors of development. Concerning the planning process, the research found that the district development plan (DDP) was crafted through drawing its priorities from the national development plans embedded in the Economic Development and Poverty Reduction Strategies (EDPRS) and Rwanda‟s Vision 2020. However, despite the existence of the Joint Action Development Forum (JADF), created to join the development plans of development partners to the DDP, testimonies from development partners revealed that their relationship with the district is characterised by the lack of frank collaboration, leading to their not being fully associated in the planning process. This research also found that the decentralisation policy has contributed only to a limited extent to the improvement of service delivery in Gasabo district. It was observed that effective service delivery is still hampered by the lack of skilled employees, especially in the areas of education, health and engineering, a budget insufficient for the effective implementation of development projects in such a way as to satisfy the expectations of beneficiaries. In view of the aforementioned findings, the study recommends that the central government intervene in training district tax officers regarding mechanisms and strategies of maximising tax collection to draw sufficient funds to carry out development plans. Through building their capacity, the imbalance between the responsibilities and means allocated for carrying out their achievement can be progressively reduced. Furthermore, to prevent development from taking place in a random manner, district authorities should receive technical support from the central government through linking the local planning process to national poverty reduction efforts. The annual performance contract system needs to be strengthened and monitored to evaluate the implementation of district development plans so as to prevent any kind of poor leadership performance, with the aim of optimising available resources.
- Full Text:
- Date Issued: 2016
The influence of the environment on nature-based adventure tourism
- Authors: Giddy, Julia K
- Date: 2016
- Subjects: Human ecology , Tourism -- Environmental aspects , Adventure travel
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/9296 , vital:26561
- Description: Adventure tourism (AT) is a rapidly growing subsector of the tourism industry. With the recent increase in AT, the nature of the industry is undergoing major changes. Originally a small and relatively specialized sector of tourism, AT is now expanding to include ommercialized and larger scale operations. This creates a need to re-evaluate the AT industry in the context of these new, highly commercialized and often “manufactured” adventure experiences. Although there are many definitions and conceptualizations of what onstitutes AT, it is most often referred to as tourism experiences that involve some element of risk and typically take place in outdoor natural environments. Inherent in the definition of AT is the natural environment, however very little research has focused on the role of the environment in AT. The interaction between humans and the environment is one of the most fundamental relationships of human existence. Within this context, existing research largely focuses on the influence of humans on the environment. However, it is important to also understand how the environment influences human behaviour. This thesis, therefore, seeks to examine the influence of the environment on humans in the AT context. It does so by analyzing three primary aspects of human-environment interaction in AT participation. The first is participants’ ‘value system’including their general perspectives of the environment and previous experience with AT. The second focuses on the relative strength and nature of environmental influences on AT motivations. The final aspect delves into the role of the environment in enhancing AT experiences and satisfaction. These assessments were done by analyzing questionnaires collected from participants in eight commercial AT operations along the Cape South Coast of South Africa. Data was primarily based on responses to statements using a 5 point Likert Scale. The responses were analyzed and discussions utilized results based on descriptive statistics, significance levels based on onesample t-tests, frequency distributions and analysis of variance (ANOVAs) which divided the data based on activity type. In addition Pearson’s Product Moment Correlations were conducted to assess linkages between different components of the thesis. The results that emerged from this thesis show that the environment plays an important role in AT participation. The value system of commercial AT participants demonstrated a level of general experience with AT as well as moderate environmental values. The strength of the environment in the motivations to participate in AT emerged quite substantially. Reflective interactions with nature (i.e. learning about the environment, and appreciating nature’s beauty) were found to be amongst the most significant internal motivation factors for participation. Interestingly, although the vast majority of research focuses on the Risk/Thrill element of AT motivations, it was not found to be an important motivation factor amongst the vast majority of AT participants. The environmental aspects of the destination were found to be, by far, the most significant external motivation factor, implying that the selection of destination for AT participation is largely based on the environment in which the activity takes place. Participants were also found to have strong, positive emotional experiences as a result of AT participation,which were significantly enhanced by the environment in which the activities took place. In addition, as a result of these positive experiences, emotionally and with the environment, participants were highly satisfied with the AT experiences. The culmination of the results discussed above was the development of a modified, empirically-tested framework for human-environment interaction in the AT context. The final framework demonstrated links between various components of human-environment interaction. Strong links were found between motivations, experiences and satisfaction while relatively weak links were found between the value system of participants and their subsequent motivations. The framework was developed for the possibility of applying it to other contexts. The findings in this thesis demonstrate that the environment does, in fact, play an important role in the interaction between humans and the environment in AT. They emphasize the relatively significant influence that the environment has on the motivations and experiences of AT participants.
- Full Text:
- Date Issued: 2016
- Authors: Giddy, Julia K
- Date: 2016
- Subjects: Human ecology , Tourism -- Environmental aspects , Adventure travel
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/9296 , vital:26561
- Description: Adventure tourism (AT) is a rapidly growing subsector of the tourism industry. With the recent increase in AT, the nature of the industry is undergoing major changes. Originally a small and relatively specialized sector of tourism, AT is now expanding to include ommercialized and larger scale operations. This creates a need to re-evaluate the AT industry in the context of these new, highly commercialized and often “manufactured” adventure experiences. Although there are many definitions and conceptualizations of what onstitutes AT, it is most often referred to as tourism experiences that involve some element of risk and typically take place in outdoor natural environments. Inherent in the definition of AT is the natural environment, however very little research has focused on the role of the environment in AT. The interaction between humans and the environment is one of the most fundamental relationships of human existence. Within this context, existing research largely focuses on the influence of humans on the environment. However, it is important to also understand how the environment influences human behaviour. This thesis, therefore, seeks to examine the influence of the environment on humans in the AT context. It does so by analyzing three primary aspects of human-environment interaction in AT participation. The first is participants’ ‘value system’including their general perspectives of the environment and previous experience with AT. The second focuses on the relative strength and nature of environmental influences on AT motivations. The final aspect delves into the role of the environment in enhancing AT experiences and satisfaction. These assessments were done by analyzing questionnaires collected from participants in eight commercial AT operations along the Cape South Coast of South Africa. Data was primarily based on responses to statements using a 5 point Likert Scale. The responses were analyzed and discussions utilized results based on descriptive statistics, significance levels based on onesample t-tests, frequency distributions and analysis of variance (ANOVAs) which divided the data based on activity type. In addition Pearson’s Product Moment Correlations were conducted to assess linkages between different components of the thesis. The results that emerged from this thesis show that the environment plays an important role in AT participation. The value system of commercial AT participants demonstrated a level of general experience with AT as well as moderate environmental values. The strength of the environment in the motivations to participate in AT emerged quite substantially. Reflective interactions with nature (i.e. learning about the environment, and appreciating nature’s beauty) were found to be amongst the most significant internal motivation factors for participation. Interestingly, although the vast majority of research focuses on the Risk/Thrill element of AT motivations, it was not found to be an important motivation factor amongst the vast majority of AT participants. The environmental aspects of the destination were found to be, by far, the most significant external motivation factor, implying that the selection of destination for AT participation is largely based on the environment in which the activity takes place. Participants were also found to have strong, positive emotional experiences as a result of AT participation,which were significantly enhanced by the environment in which the activities took place. In addition, as a result of these positive experiences, emotionally and with the environment, participants were highly satisfied with the AT experiences. The culmination of the results discussed above was the development of a modified, empirically-tested framework for human-environment interaction in the AT context. The final framework demonstrated links between various components of human-environment interaction. Strong links were found between motivations, experiences and satisfaction while relatively weak links were found between the value system of participants and their subsequent motivations. The framework was developed for the possibility of applying it to other contexts. The findings in this thesis demonstrate that the environment does, in fact, play an important role in the interaction between humans and the environment in AT. They emphasize the relatively significant influence that the environment has on the motivations and experiences of AT participants.
- Full Text:
- Date Issued: 2016
The relationship between language and xenophobia: a developmental perspective
- Authors: Chikanda, Flora
- Date: 2016
- Subjects: Xenophobia -- South Africa , Xenophobia in language , Immigrants -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/4942 , vital:20768
- Description: Modernisation, globalisation, neoliberalism and the increase in immigration have morphed into xenophobia, as they have resulted in structures that increased inequalities and competition for scarce resources, although there are other factors such as the global recession that is deepening inequalities and social classes. In South Africa, xenophobia is a topical matter, with chronic violent outbursts. The study addresses the gap in knowledge in the relationship between language and xenophobia. Language is central to human communication and to human socialisation and is not neutral but is embedded in ideologies that favour specific interest groups. The neoliberal ideology compels people as human capital to develop linguistic capital. The paradox is that globalisation transcends the national to transnational, while at the same time being conscious of the local or the indigenous language. Globalisation promotes hybridity and diversity, while at the same time promoting homogeneity or Westernisation, which is contrary to the nationalist ideology to protect the cultural heritage of the locals. This thesis is guided by a range of classical and more contemporary development theories. It includes the use of Marxist theory with regard to ownership and unequal distribution of resources. The culture of violence that manifests in xenophobia in South Africa can also be related to the violence of the colonial and apartheid periods. This thesis is also guided by the post-colonial theory. It also looks at theories of modernity and of globalisation, suggesting that a truly ‘modern’ society should be transformed in all spheres and should value multifaceted human well-being (and not only in terms of economic ‘growth’). A primary objective of this study is to explore the role of language in social institutions such as education in order to understand how matters of language exacerbate xenophobia and to document the challenges related to language that ‘foreigners’ from other parts of Africa face in South Africa. Questions asked include whether they can survive/thrive without knowledge of local languages, whether they are victims of crime because they cannot speak the local languages and whether and how they are being assimilated into South African society. This research therefore, recommends that language planning in South Africa should maintain a balance in the use of the English language as a lingua franca and the use of the indigenous languages so as to avoid the language endangerment of the indigenous languages and monolingualism, as well as subtractive bilingualism. This research is against institutional discrimination of foreigners by use of language as a gate keeper or an entry fee into the higher domains. The results of this research lead to the recommendation on language planning that leads to economic opportunity, higher economic productivity, educational development, enrichment in the sense of creativity innovation, cognitive flexibility, and more effective social integration, while restoring citizens’ sense of self-worth and their experience of emotional and social security, and also promoting social integrity and nation-building. Good language planning should be a crucial aspect of development planning. This research contributes to the field of Development Studies in that it analyses the conflicting issues within language and xenophobia in South Africa, while using the complexity theory to restore a modernised society with modern values that are not xenophobic but open to the global society. It also contributes to the politics of culture by keeping a balance between the endogenous culture versus the exogenous culture; a localised culture versus a globalised culture.
- Full Text:
- Date Issued: 2016
- Authors: Chikanda, Flora
- Date: 2016
- Subjects: Xenophobia -- South Africa , Xenophobia in language , Immigrants -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/4942 , vital:20768
- Description: Modernisation, globalisation, neoliberalism and the increase in immigration have morphed into xenophobia, as they have resulted in structures that increased inequalities and competition for scarce resources, although there are other factors such as the global recession that is deepening inequalities and social classes. In South Africa, xenophobia is a topical matter, with chronic violent outbursts. The study addresses the gap in knowledge in the relationship between language and xenophobia. Language is central to human communication and to human socialisation and is not neutral but is embedded in ideologies that favour specific interest groups. The neoliberal ideology compels people as human capital to develop linguistic capital. The paradox is that globalisation transcends the national to transnational, while at the same time being conscious of the local or the indigenous language. Globalisation promotes hybridity and diversity, while at the same time promoting homogeneity or Westernisation, which is contrary to the nationalist ideology to protect the cultural heritage of the locals. This thesis is guided by a range of classical and more contemporary development theories. It includes the use of Marxist theory with regard to ownership and unequal distribution of resources. The culture of violence that manifests in xenophobia in South Africa can also be related to the violence of the colonial and apartheid periods. This thesis is also guided by the post-colonial theory. It also looks at theories of modernity and of globalisation, suggesting that a truly ‘modern’ society should be transformed in all spheres and should value multifaceted human well-being (and not only in terms of economic ‘growth’). A primary objective of this study is to explore the role of language in social institutions such as education in order to understand how matters of language exacerbate xenophobia and to document the challenges related to language that ‘foreigners’ from other parts of Africa face in South Africa. Questions asked include whether they can survive/thrive without knowledge of local languages, whether they are victims of crime because they cannot speak the local languages and whether and how they are being assimilated into South African society. This research therefore, recommends that language planning in South Africa should maintain a balance in the use of the English language as a lingua franca and the use of the indigenous languages so as to avoid the language endangerment of the indigenous languages and monolingualism, as well as subtractive bilingualism. This research is against institutional discrimination of foreigners by use of language as a gate keeper or an entry fee into the higher domains. The results of this research lead to the recommendation on language planning that leads to economic opportunity, higher economic productivity, educational development, enrichment in the sense of creativity innovation, cognitive flexibility, and more effective social integration, while restoring citizens’ sense of self-worth and their experience of emotional and social security, and also promoting social integrity and nation-building. Good language planning should be a crucial aspect of development planning. This research contributes to the field of Development Studies in that it analyses the conflicting issues within language and xenophobia in South Africa, while using the complexity theory to restore a modernised society with modern values that are not xenophobic but open to the global society. It also contributes to the politics of culture by keeping a balance between the endogenous culture versus the exogenous culture; a localised culture versus a globalised culture.
- Full Text:
- Date Issued: 2016
The role of apex predators in ecosystem function: fear triggered cascades regulated by differential prey vulnerability
- Authors: Le Roux, Elizabeth
- Date: 2016
- Subjects: Top predators -- Ecology Predation (Biology)
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/14774 , vital:27849
- Description: Trophic cascades involving large terrestrial mammals are very seldom empirically demonstrated. The high species diversity often associated with terrestrial systems is thought to modulate the strength of trophic cascades. In speciose systems, species often vary in vulnerability to consumption, hence some species are less responsive to top-down pressure. African large mammalian herbivores are highly diverse and vary greatly in body size, a characteristic linked to vulnerability to predation. Moreover, Africa is one of the last places to still support megaherbivores, species that have grown large enough to be practically impervious to non-human predation. Thus an African ecosystem is the ideal setting to explore trophic cascades in speciose terrestrial systems. In this study I explored patterns in trophic interaction amongst carnivores, vulnerable mesoherbivore and predator-invulnerable megaherbivores in an intact African savanna at a variety of spatial scales. I examined the mechanistic links between trophic levels at the patch scale through fine scale empirical manipulation of predation risk. In addition, I assessed the landscape scale biological relevance of these trophic interactions through correlative observations over large spatiotemporal scales. I present the first evidence of community level trophic cascades explicitly involving megaherbivores. I demonstrate how megaherbivores’ disregard of predation risk masks the effects of predator-triggered trophic cascades and weakens their impact on the ecosystem. The risk of predation triggered a spatial response in vulnerable species, driving them into safe areas, yet did not influence the space use of megaherbivores. This species-specific spatial response had contrasting effects on nutrient distribution. Vulnerable herbivores’ fear-induced foraging behaviour led to localised nutrient accumulation whereas the foraging behaviour of predator-invulnerable megaherbivores led to nutrient redistribution across the landscape. In addition, the fear-driven spatial differences in mesoherbivore grazing impact and nutrient deposition led to landscape scale changes in the distribution and persistence of herbivore maintained grass communities, so-called grazing lawns. However, the grazing activity of the in-vulnerable megagrazer, white rhino (Ceratotherium simum) weakened the effect of this trophic cascade by creating and maintaining grazing lawns within the risky habitat avoided by mesograzers. This study contributes to our understanding of what drives the variation among patterns of trophic control and provides the first evidence of the modulating influence that megaherbivores have on predator-triggered trophic cascades.
- Full Text:
- Date Issued: 2016
- Authors: Le Roux, Elizabeth
- Date: 2016
- Subjects: Top predators -- Ecology Predation (Biology)
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/14774 , vital:27849
- Description: Trophic cascades involving large terrestrial mammals are very seldom empirically demonstrated. The high species diversity often associated with terrestrial systems is thought to modulate the strength of trophic cascades. In speciose systems, species often vary in vulnerability to consumption, hence some species are less responsive to top-down pressure. African large mammalian herbivores are highly diverse and vary greatly in body size, a characteristic linked to vulnerability to predation. Moreover, Africa is one of the last places to still support megaherbivores, species that have grown large enough to be practically impervious to non-human predation. Thus an African ecosystem is the ideal setting to explore trophic cascades in speciose terrestrial systems. In this study I explored patterns in trophic interaction amongst carnivores, vulnerable mesoherbivore and predator-invulnerable megaherbivores in an intact African savanna at a variety of spatial scales. I examined the mechanistic links between trophic levels at the patch scale through fine scale empirical manipulation of predation risk. In addition, I assessed the landscape scale biological relevance of these trophic interactions through correlative observations over large spatiotemporal scales. I present the first evidence of community level trophic cascades explicitly involving megaherbivores. I demonstrate how megaherbivores’ disregard of predation risk masks the effects of predator-triggered trophic cascades and weakens their impact on the ecosystem. The risk of predation triggered a spatial response in vulnerable species, driving them into safe areas, yet did not influence the space use of megaherbivores. This species-specific spatial response had contrasting effects on nutrient distribution. Vulnerable herbivores’ fear-induced foraging behaviour led to localised nutrient accumulation whereas the foraging behaviour of predator-invulnerable megaherbivores led to nutrient redistribution across the landscape. In addition, the fear-driven spatial differences in mesoherbivore grazing impact and nutrient deposition led to landscape scale changes in the distribution and persistence of herbivore maintained grass communities, so-called grazing lawns. However, the grazing activity of the in-vulnerable megagrazer, white rhino (Ceratotherium simum) weakened the effect of this trophic cascade by creating and maintaining grazing lawns within the risky habitat avoided by mesograzers. This study contributes to our understanding of what drives the variation among patterns of trophic control and provides the first evidence of the modulating influence that megaherbivores have on predator-triggered trophic cascades.
- Full Text:
- Date Issued: 2016
The voice of the child in parental divorce: a narrative inquiry
- Authors: Brand, Carrie
- Date: 2016
- Subjects: Conversation analysis , Children of divorced parents , Divorced parents
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/8923 , vital:26443
- Description: Parental divorce is considered one of the most stressful events in the lives of children. The adult perspective has dominated the discourse on divorce, and only recently has research started to consider the viewpoint of children. Research indicates that the nature of the divorce process as experienced by the child is the most important factor in post-divorce adjustment. It also remains a relatively unexplored area, with research on the manner in which children experience the divorce process being limited. The current study aimed to conduct a narrative inquiry into the experiences and perceptions of parental divorce, of a purposive sample of 9 to 10 year old children. The primary aim of the study was to highlight and honour the voice of the child in a parental divorce process. The current research was qualitative in nature and adopted a narrative paradigm. Five children were interviewed qualitatively using an unstructured interview. Data were analysed using thematic analysis. Seven themes were identified. The first theme explored children’s endeavours to describe and explain parental divorce. An additional six themes were developed around the types of stories children told of the divorce process. Themes included, What is a Divorcement, Stories of Loss, Stories of Gain, Stories of Change, Stories of Stability, Healing Stories, and Complicating Stories. This study endeavoured to provide divorced parents and those working with children a greater understanding of the way in which children perceive parental divorce, and insight into the factors that facilitate children’s positive adjustment to parental divorce.
- Full Text:
- Date Issued: 2016
- Authors: Brand, Carrie
- Date: 2016
- Subjects: Conversation analysis , Children of divorced parents , Divorced parents
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/8923 , vital:26443
- Description: Parental divorce is considered one of the most stressful events in the lives of children. The adult perspective has dominated the discourse on divorce, and only recently has research started to consider the viewpoint of children. Research indicates that the nature of the divorce process as experienced by the child is the most important factor in post-divorce adjustment. It also remains a relatively unexplored area, with research on the manner in which children experience the divorce process being limited. The current study aimed to conduct a narrative inquiry into the experiences and perceptions of parental divorce, of a purposive sample of 9 to 10 year old children. The primary aim of the study was to highlight and honour the voice of the child in a parental divorce process. The current research was qualitative in nature and adopted a narrative paradigm. Five children were interviewed qualitatively using an unstructured interview. Data were analysed using thematic analysis. Seven themes were identified. The first theme explored children’s endeavours to describe and explain parental divorce. An additional six themes were developed around the types of stories children told of the divorce process. Themes included, What is a Divorcement, Stories of Loss, Stories of Gain, Stories of Change, Stories of Stability, Healing Stories, and Complicating Stories. This study endeavoured to provide divorced parents and those working with children a greater understanding of the way in which children perceive parental divorce, and insight into the factors that facilitate children’s positive adjustment to parental divorce.
- Full Text:
- Date Issued: 2016
A business model for medical subspecialty training in South Africa
- Dalmeyer, Johannes Paulus Franciscus
- Authors: Dalmeyer, Johannes Paulus Franciscus
- Date: 2015
- Subjects: Health care teams -- Training of -- South Africa , Medical care -- Needs assessment -- South Africa , Evidence-based medicine -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3508 , vital:20437
- Description: The shortage of healthcare workers and doctors in the developing world compared to the developed world is a problem, and will continue to be so, due to the continual migration of qualified professionals and the inability of the state to remedy these shortfalls. A shortage of healthcare workers and specialist doctors will seriously hamper the Government’s National Health Insurance (NHI) plan, as well as the sustainability of the private health care sector. In addition, the duration of medical training in South Africa is exceptionally long. The three major hospital groups and other private corporates have over the last number of years taken limited initiative to fund education projects in conjunction with the academic institutions. However, these projects have been poorly focused and have been managed in an unstructured and detached manner. There is a desire from the private sector to get involved in these projects on a much larger scale through more formalised structures. Given this background, the primary objective of this research is to develop a business model for medical subspecialty training to complement the current academic subspecialty training in South Africa. A trial model for training subspecialists in reproductive medicine was developed as a first attempt to address the threatening shortages and training duration. This trial programme is the basis of this research. A two-phased process was used in collecting data. In Phase 1 data was collected from stakeholder groups. The results of this survey assisted in generating variables to include in the measuring instrument for the survey in Phase 2. In Phase 2 the perceptions and expectations of sub-specialists (reproductive subspecialists and cardiologists) regarding sub-specialty training was collected. The results of the demographic variables confirm the aging profile of subspecialist and the need to ensure succession. The results further showed that cardiologists and reproductive subspecialist expectations of the training of subspecialists are very similar except for their expectations on the training duration. Reproductive subspecialist respondents agreed more than cardiology subspecialist respondents that the training duration is too long. The biggest gap between perceptions and expectations is also with the factor training. The results showed that the expectations of subspecialists are not met for training. From these results a business model for the training of medical subspecialists is proposed. This proposed business model can play a complementary role to the existing state controlled system and form the bases of Public Private Partnerships (PPP) in medical training. This proposed business model will fit a developing country were the focus is on primary healthcare, with financial and capacity constraints. The proposed model would require role players to bring about change to accommodate a larger scale Public Private Partnership (PPP) to ensure the implementation of the model. The proposed decentralised business model for training subspecialists would allow the trainee subspecialist to practise as a specialist thus maintaining an acceptable income, and enable an expedited completion and lead to a wider dissemination of medical expertise that can be delivered in a wider national foot print. It further will provide for a structured Public Private Partnership.
- Full Text:
- Date Issued: 2015
- Authors: Dalmeyer, Johannes Paulus Franciscus
- Date: 2015
- Subjects: Health care teams -- Training of -- South Africa , Medical care -- Needs assessment -- South Africa , Evidence-based medicine -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3508 , vital:20437
- Description: The shortage of healthcare workers and doctors in the developing world compared to the developed world is a problem, and will continue to be so, due to the continual migration of qualified professionals and the inability of the state to remedy these shortfalls. A shortage of healthcare workers and specialist doctors will seriously hamper the Government’s National Health Insurance (NHI) plan, as well as the sustainability of the private health care sector. In addition, the duration of medical training in South Africa is exceptionally long. The three major hospital groups and other private corporates have over the last number of years taken limited initiative to fund education projects in conjunction with the academic institutions. However, these projects have been poorly focused and have been managed in an unstructured and detached manner. There is a desire from the private sector to get involved in these projects on a much larger scale through more formalised structures. Given this background, the primary objective of this research is to develop a business model for medical subspecialty training to complement the current academic subspecialty training in South Africa. A trial model for training subspecialists in reproductive medicine was developed as a first attempt to address the threatening shortages and training duration. This trial programme is the basis of this research. A two-phased process was used in collecting data. In Phase 1 data was collected from stakeholder groups. The results of this survey assisted in generating variables to include in the measuring instrument for the survey in Phase 2. In Phase 2 the perceptions and expectations of sub-specialists (reproductive subspecialists and cardiologists) regarding sub-specialty training was collected. The results of the demographic variables confirm the aging profile of subspecialist and the need to ensure succession. The results further showed that cardiologists and reproductive subspecialist expectations of the training of subspecialists are very similar except for their expectations on the training duration. Reproductive subspecialist respondents agreed more than cardiology subspecialist respondents that the training duration is too long. The biggest gap between perceptions and expectations is also with the factor training. The results showed that the expectations of subspecialists are not met for training. From these results a business model for the training of medical subspecialists is proposed. This proposed business model can play a complementary role to the existing state controlled system and form the bases of Public Private Partnerships (PPP) in medical training. This proposed business model will fit a developing country were the focus is on primary healthcare, with financial and capacity constraints. The proposed model would require role players to bring about change to accommodate a larger scale Public Private Partnership (PPP) to ensure the implementation of the model. The proposed decentralised business model for training subspecialists would allow the trainee subspecialist to practise as a specialist thus maintaining an acceptable income, and enable an expedited completion and lead to a wider dissemination of medical expertise that can be delivered in a wider national foot print. It further will provide for a structured Public Private Partnership.
- Full Text:
- Date Issued: 2015
A critical assessment of responsible tourism practices: a case study of Stormsriver adventures
- Authors: Van Zyl, Shireen Rosemary
- Date: 2015
- Subjects: Sustainable tourism , Tourism -- Management , Economic development
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/4954 , vital:20770
- Description: The research problem was based on the private sector implementation of Responsible Tourism, since 1996, perceived to be slow and challenging (Frey & George, 2010: 107). The South Africa Government proposed Responsible Tourism as the guiding principle for sustainable tourism development (Goodwin, 2011: 138). The problem is compounded by shortcomings identified in the nature of the research conducted about tourism and communities and the methodologies used. Tourism-Community relationships Theory was applied as the conceptual framework of the study. This theory advocates a holistic approach when conducting research about the impacts of tourism, encompassing community perspectives, attitudes, reactions and considerations for the future development and control of tourism (Pearce, Moscardo & Ross, 1996: 2). The insights gained contributed an emic understanding of the keyinformants’ perspectives imparted in their own language. This study is located in the Interpretevist paradigm, underpinned by Constructivist philosophy. Meaning is created through the reality of key-informants, their perspectives and the interaction of individuals in a community (Cresswell, 2014: 8). The Instrumental Case Study Approach (Stake, 1995) contributed an etic perspective in terms of the researcher’s interpretations. The single, qualitative case was applied to gain deeper insights about the phenomenon of Responsible tourism. The case investigated was Stormsriver Adventures (SRA), an eco-adventure tourism business in the Tsitsikamma tourism destination in the Eastern Cape region of South Africa. SRA is reputed to be business best practice in its implementation of Responsible Tourism. Data triangulation was established through multiple methods of data collection, namely in-depth interviews with key-informants, documentation sourced from them and researcher observation. Data analysis methods, namely direct interpretation, categorical aggregation, pattern seeking and naturalistic generalisations (Stake, 1995), were used. The member checking process assisted with establishing data triangulation as keyinformants corroborated or dispelled the researcher’s interpretation of data. Findings were structured according to within-case themes, namely SRA’s perspective of its Responsible Tourism practices, the community’s perspective of SRA’s Responsible Tourism practices and perspectives about the future development and control of tourism. The study contributes new theoretical insights through applying the inductive approach to selected findings. Findings indicate that the perspectives of the community are divided. SRA keyinformants conveyed positive economic, social and environmental impacts of SRA’s Responsible Tourism practices. Key-informants not directly linked to SRA raised negative economic impacts and questioned the accuracy of SRA’s marketing messages. Within-case conclusions are that it is not the responsibility of one tourism business that practices Responsible Tourism to achieve sustainability within the tourism destination. To this end it is recommended that SRA and the community find common ground and that the misunderstandings that exist, be addressed. The study concludes that in order to achieve successful Responsible Tourism- Community Relationships, a holistically and integrated approach is required. To this end the recommendations made provide an implementation framework within the context of a tourism destination. The study adds value to the field knowledge about the implementation of Responsible Tourism by the private sector in South Africa and also contributes new knowledge to the field of tourism in terms of the particular methodology used.
- Full Text:
- Date Issued: 2015
- Authors: Van Zyl, Shireen Rosemary
- Date: 2015
- Subjects: Sustainable tourism , Tourism -- Management , Economic development
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/4954 , vital:20770
- Description: The research problem was based on the private sector implementation of Responsible Tourism, since 1996, perceived to be slow and challenging (Frey & George, 2010: 107). The South Africa Government proposed Responsible Tourism as the guiding principle for sustainable tourism development (Goodwin, 2011: 138). The problem is compounded by shortcomings identified in the nature of the research conducted about tourism and communities and the methodologies used. Tourism-Community relationships Theory was applied as the conceptual framework of the study. This theory advocates a holistic approach when conducting research about the impacts of tourism, encompassing community perspectives, attitudes, reactions and considerations for the future development and control of tourism (Pearce, Moscardo & Ross, 1996: 2). The insights gained contributed an emic understanding of the keyinformants’ perspectives imparted in their own language. This study is located in the Interpretevist paradigm, underpinned by Constructivist philosophy. Meaning is created through the reality of key-informants, their perspectives and the interaction of individuals in a community (Cresswell, 2014: 8). The Instrumental Case Study Approach (Stake, 1995) contributed an etic perspective in terms of the researcher’s interpretations. The single, qualitative case was applied to gain deeper insights about the phenomenon of Responsible tourism. The case investigated was Stormsriver Adventures (SRA), an eco-adventure tourism business in the Tsitsikamma tourism destination in the Eastern Cape region of South Africa. SRA is reputed to be business best practice in its implementation of Responsible Tourism. Data triangulation was established through multiple methods of data collection, namely in-depth interviews with key-informants, documentation sourced from them and researcher observation. Data analysis methods, namely direct interpretation, categorical aggregation, pattern seeking and naturalistic generalisations (Stake, 1995), were used. The member checking process assisted with establishing data triangulation as keyinformants corroborated or dispelled the researcher’s interpretation of data. Findings were structured according to within-case themes, namely SRA’s perspective of its Responsible Tourism practices, the community’s perspective of SRA’s Responsible Tourism practices and perspectives about the future development and control of tourism. The study contributes new theoretical insights through applying the inductive approach to selected findings. Findings indicate that the perspectives of the community are divided. SRA keyinformants conveyed positive economic, social and environmental impacts of SRA’s Responsible Tourism practices. Key-informants not directly linked to SRA raised negative economic impacts and questioned the accuracy of SRA’s marketing messages. Within-case conclusions are that it is not the responsibility of one tourism business that practices Responsible Tourism to achieve sustainability within the tourism destination. To this end it is recommended that SRA and the community find common ground and that the misunderstandings that exist, be addressed. The study concludes that in order to achieve successful Responsible Tourism- Community Relationships, a holistically and integrated approach is required. To this end the recommendations made provide an implementation framework within the context of a tourism destination. The study adds value to the field knowledge about the implementation of Responsible Tourism by the private sector in South Africa and also contributes new knowledge to the field of tourism in terms of the particular methodology used.
- Full Text:
- Date Issued: 2015
A framework for cloud computing adoption in small and medium-sized enterprises : a case of the Accra - Tema metropolis in Ghana
- Authors: Adane, Martin
- Date: 2015
- Subjects: Cloud computing -- Ghana Small business -- Ghana
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/13803 , vital:39713
- Description: Cloud computing adoption and usage is important to achieving business competition. This is done by making it a competitive tool for firms. The adoption of cloud computing enables firms to achieve greater business competency, improve performance, and allows them to maintain their competitive advantage. Since its emergence, there has been a surge in the adoption of cloud computing with research into its adoption primarily concentrated on bigger firms. However, a major characteristic of cloud computing is the anticipated possibilities it holds for small and medium-sized enterprises (SMEs). SMEs typically operate differently from larger firms and are not limited by resource constraints. For SMEs, the reduction in the financial burden normally associated with the adoption of new technologies is a significant benefit of cloud computing due to their financial constraints. In Ghana, SMEs mostly use obsolete technologies and have a slow response towards new technologies. Thus, they are unable to harness the numerous opportunities technology presents to them to stay competitive. Cloud computing is still regarded as a new technology in the business world, therefore research that focuses on its adoption by SMEs to help them stay competitive is minimal. Available research on cloud computing in Ghana does not provide clear guidelines for ensuring a successful adoption process and the continued use of cloud computing services. This study seeks to investigate how a framework can assist SMEs in their use of cloud computing in the Accra-Tema metropolis of Ghana. A knowledge of the factors associated with adoption decisions and those that significantly influence the decision are required to ensure a successful adoption process. The empirical data was gathered using a questionnaire and face-to-face interviews developed from literature and administered to users and potential users of cloud computing. The questionnaire and interviews primarily investigate key adoption factors and the findings are reported in this research study. The findings reveal interesting insights into understanding issues that affect the overall decision to adopt and use cloud computing services by SMEs. The findings show that the adoption of cloud computing can improve information management practices within SMEs. The findings also reveal that several factors need to be considered in the overall decision to adopt and use cloud computing to ensure a successful adoption process. An initial cloud computing adoption model was proposed based on the empirical findings. Key adoption factors of the initial adoption model include adoption benefits and drivers, concerns and barriers, adoption interventions, and information management in the cloud. computing adoption framework. The proposed adoption framework aims to assist SMEs to adopt and use cloud computing services and make them relevant in the global market.
- Full Text:
- Date Issued: 2015
- Authors: Adane, Martin
- Date: 2015
- Subjects: Cloud computing -- Ghana Small business -- Ghana
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/13803 , vital:39713
- Description: Cloud computing adoption and usage is important to achieving business competition. This is done by making it a competitive tool for firms. The adoption of cloud computing enables firms to achieve greater business competency, improve performance, and allows them to maintain their competitive advantage. Since its emergence, there has been a surge in the adoption of cloud computing with research into its adoption primarily concentrated on bigger firms. However, a major characteristic of cloud computing is the anticipated possibilities it holds for small and medium-sized enterprises (SMEs). SMEs typically operate differently from larger firms and are not limited by resource constraints. For SMEs, the reduction in the financial burden normally associated with the adoption of new technologies is a significant benefit of cloud computing due to their financial constraints. In Ghana, SMEs mostly use obsolete technologies and have a slow response towards new technologies. Thus, they are unable to harness the numerous opportunities technology presents to them to stay competitive. Cloud computing is still regarded as a new technology in the business world, therefore research that focuses on its adoption by SMEs to help them stay competitive is minimal. Available research on cloud computing in Ghana does not provide clear guidelines for ensuring a successful adoption process and the continued use of cloud computing services. This study seeks to investigate how a framework can assist SMEs in their use of cloud computing in the Accra-Tema metropolis of Ghana. A knowledge of the factors associated with adoption decisions and those that significantly influence the decision are required to ensure a successful adoption process. The empirical data was gathered using a questionnaire and face-to-face interviews developed from literature and administered to users and potential users of cloud computing. The questionnaire and interviews primarily investigate key adoption factors and the findings are reported in this research study. The findings reveal interesting insights into understanding issues that affect the overall decision to adopt and use cloud computing services by SMEs. The findings show that the adoption of cloud computing can improve information management practices within SMEs. The findings also reveal that several factors need to be considered in the overall decision to adopt and use cloud computing to ensure a successful adoption process. An initial cloud computing adoption model was proposed based on the empirical findings. Key adoption factors of the initial adoption model include adoption benefits and drivers, concerns and barriers, adoption interventions, and information management in the cloud. computing adoption framework. The proposed adoption framework aims to assist SMEs to adopt and use cloud computing services and make them relevant in the global market.
- Full Text:
- Date Issued: 2015
A positive clinical psychology approach to developing resilience among state employed nurses
- Authors: Plumb, Sarah
- Date: 2015
- Subjects: Nurses -- Job stress , Nursing -- Psychological aspects , Resilience (Personality trait)
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9955 , http://hdl.handle.net/10948/d1018879
- Description: Nurses are confronted with numerous work-related stressors that can result in burnout. This can contribute to absenteeism and high turn-over rates in the nursing profession. A review of the literature indicated that psycho-educational interventions to increase resilience could be an effective way of addressing this problem. The study aimed to develop a positive clinical-psychology approach to increasing resilience in State employed nurses. The study used a mixed-method approach to determine the current psychological functioning of a sample of 87 nurses. Quantitative data on personality traits, character strengths and levels of resilience were obtained, using the NEO PI-R, VIA – IS, and Resilience Scale. Qualitative data on the coping responses of nurses were obtained through the thematic analysis of focus groups. These data were integrated to create a positive clinical psychology conceptualisation of resilience and to develop therapeutic guidelines for a group psycho-educational intervention. The results of the study indicated a struggling psychological profile. This was defined as the ability to deal with work-related stressors – but with the potential risk of developing symptoms of burnout. The moderate levels of resilience were attributed to elevated character strengths in the sample. The distribution of personality traits indicated that the nurses in the sample were at risk of developing burnout; and this prevented them from flourishing. These data were synthesised to create therapeutic guidelines for developing resilience aimed: (1) increasing emotional stability and invulnerability; (2) increasing agreeableness; and (3) increasing conscientiousness. These guidelines were based on the personality traits that were deemed to negatively impact the resilience of the nurses. These personality traits were correlated with several character strengths that displayed strong relationships with resilience. This indicated that resilience could be developed through the cultivation of the following character strengths: perspective; perseverance; fairness; forgiveness; leadership; love; zest; hope; curiosity; and appreciation of beauty and excellence. These character strengths were identified to facilitate the positive adaptation of the personality traits identified in the therapeutic guidelines. A group psycho-educational intervention was developed, using the positive clinical psychology conceptualisation of resilience. The literature was reviewed to identify techniques to cultivate the ten character strengths specified in the therapeutic guidelines. These techniques were adapted to create experiential learning processes for the intervention. This psycho-educational programme can be applied as a secondary and tertiary intervention. It can be used to increase resilience to prevent burnout among nurses. It can also be used to psychologically empower nurses that have existing symptoms of burnout.
- Full Text:
- Date Issued: 2015
- Authors: Plumb, Sarah
- Date: 2015
- Subjects: Nurses -- Job stress , Nursing -- Psychological aspects , Resilience (Personality trait)
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9955 , http://hdl.handle.net/10948/d1018879
- Description: Nurses are confronted with numerous work-related stressors that can result in burnout. This can contribute to absenteeism and high turn-over rates in the nursing profession. A review of the literature indicated that psycho-educational interventions to increase resilience could be an effective way of addressing this problem. The study aimed to develop a positive clinical-psychology approach to increasing resilience in State employed nurses. The study used a mixed-method approach to determine the current psychological functioning of a sample of 87 nurses. Quantitative data on personality traits, character strengths and levels of resilience were obtained, using the NEO PI-R, VIA – IS, and Resilience Scale. Qualitative data on the coping responses of nurses were obtained through the thematic analysis of focus groups. These data were integrated to create a positive clinical psychology conceptualisation of resilience and to develop therapeutic guidelines for a group psycho-educational intervention. The results of the study indicated a struggling psychological profile. This was defined as the ability to deal with work-related stressors – but with the potential risk of developing symptoms of burnout. The moderate levels of resilience were attributed to elevated character strengths in the sample. The distribution of personality traits indicated that the nurses in the sample were at risk of developing burnout; and this prevented them from flourishing. These data were synthesised to create therapeutic guidelines for developing resilience aimed: (1) increasing emotional stability and invulnerability; (2) increasing agreeableness; and (3) increasing conscientiousness. These guidelines were based on the personality traits that were deemed to negatively impact the resilience of the nurses. These personality traits were correlated with several character strengths that displayed strong relationships with resilience. This indicated that resilience could be developed through the cultivation of the following character strengths: perspective; perseverance; fairness; forgiveness; leadership; love; zest; hope; curiosity; and appreciation of beauty and excellence. These character strengths were identified to facilitate the positive adaptation of the personality traits identified in the therapeutic guidelines. A group psycho-educational intervention was developed, using the positive clinical psychology conceptualisation of resilience. The literature was reviewed to identify techniques to cultivate the ten character strengths specified in the therapeutic guidelines. These techniques were adapted to create experiential learning processes for the intervention. This psycho-educational programme can be applied as a secondary and tertiary intervention. It can be used to increase resilience to prevent burnout among nurses. It can also be used to psychologically empower nurses that have existing symptoms of burnout.
- Full Text:
- Date Issued: 2015
A proposed framework for mentoring in black-owned small businesses in South Africa
- Authors: Matabooe, Makatleho Julia
- Date: 2015
- Subjects: Mentoring in business -- South Africa , Small business -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/6520 , vital:21101
- Description: In view of the important role that small businesses play in the economic development of most economies in the world, including South Africa (Adeniran & Johnston, 2012:4088; Kongolo, 2010:2290), as well as the survival challenges that they face, the purpose of this study was to propose a framework for effective mentoring. This framework can be used to develop the business management skills of black small business owner–managers which will eventually increase the survival of small businesses in South Africa. As such, the primary objective of this study was to gain an understanding of the conditions required for effective mentoring of black-owned small businesses by empirically identifying the factors that influence effective mentoring of these businesses. If mentoring programmes for black-owned small businesses can be effective, the high failure rate of these businesses could be reduced, which may influence the South African economy positively. This study sought to review previous findings and theories on mentoring and small business development, and then contextualise these to black-owned small businesses. A comprehensive literature review revealed potential factors which could influence the effectiveness of mentoring of black-owned small businesses. Four categories of these factors were identified, namely relational-based, non-relational based, cultural and demographical factors. These factors guided the collection of primary data in this study.
- Full Text:
- Date Issued: 2015
- Authors: Matabooe, Makatleho Julia
- Date: 2015
- Subjects: Mentoring in business -- South Africa , Small business -- South Africa
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/6520 , vital:21101
- Description: In view of the important role that small businesses play in the economic development of most economies in the world, including South Africa (Adeniran & Johnston, 2012:4088; Kongolo, 2010:2290), as well as the survival challenges that they face, the purpose of this study was to propose a framework for effective mentoring. This framework can be used to develop the business management skills of black small business owner–managers which will eventually increase the survival of small businesses in South Africa. As such, the primary objective of this study was to gain an understanding of the conditions required for effective mentoring of black-owned small businesses by empirically identifying the factors that influence effective mentoring of these businesses. If mentoring programmes for black-owned small businesses can be effective, the high failure rate of these businesses could be reduced, which may influence the South African economy positively. This study sought to review previous findings and theories on mentoring and small business development, and then contextualise these to black-owned small businesses. A comprehensive literature review revealed potential factors which could influence the effectiveness of mentoring of black-owned small businesses. Four categories of these factors were identified, namely relational-based, non-relational based, cultural and demographical factors. These factors guided the collection of primary data in this study.
- Full Text:
- Date Issued: 2015
A proposed theory of war economies and supporting policy framework for dismantling war economies in Sub-Saharan Africa
- Liebenberg, Frederick Sybert
- Authors: Liebenberg, Frederick Sybert
- Date: 2015
- Subjects: Africa, Sub-Saharan -- Economic policy , Military occupation -- Economic aspects -- Africa, Sub-Saharan , War-time economies
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3235 , vital:20414
- Description: Utilising the Grounded Theory Research Method, this study identified a range of open, axial and selective codes, through a literature review, which resulted in the formulation of a proposed theory of how war economies are formed and maintained. Based on the theoretical proposition of the proposed theory, a policy framework for dismantling such war economies was also developed and presented. The proposed theory of war economies essentially argues that war economies are formed in post-colonial sub-Saharan Africa because of the existence of an artificial state. The existence of an artificial state is ascribed to the emerging legacies of colonial state formation processes, which created failed state entities which are unable to produce public goods for all its citizens because of its inability to maintain a monopoly of violence whilst maintain full administrative control over its territory. This inability results in an increase in the vulnerability of state and non-state actors. In response to these vulnerabilities, both state and non-state actors established a range of parallel political, economic and military structures. These structures in turn made use of both network and resource capacities to create an environment where politics are economised and conflict is commercialised, in order to mitigate the impacts of state failure and the inability to produce public goods. The result of the creation of an environment where politics are economised and conflict is commercialised, is the creation of incentives, structures and processes to ensure that conflict and associated conditions of instability are sustained in order to ensure primitive accumulation of wealth and resources. Based on the core theoretical proposition of the proposed theory, the study also presents a broad policy framework for dismantling war economies. In broad terms the framework proposes an integrated state-building process, based on a range of policy mechanisms aimed at maintaining a monopoly over violence, increasing administrative control, dismantling conflict networks and ensuring effective and efficient resource management.
- Full Text:
- Date Issued: 2015
- Authors: Liebenberg, Frederick Sybert
- Date: 2015
- Subjects: Africa, Sub-Saharan -- Economic policy , Military occupation -- Economic aspects -- Africa, Sub-Saharan , War-time economies
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/3235 , vital:20414
- Description: Utilising the Grounded Theory Research Method, this study identified a range of open, axial and selective codes, through a literature review, which resulted in the formulation of a proposed theory of how war economies are formed and maintained. Based on the theoretical proposition of the proposed theory, a policy framework for dismantling such war economies was also developed and presented. The proposed theory of war economies essentially argues that war economies are formed in post-colonial sub-Saharan Africa because of the existence of an artificial state. The existence of an artificial state is ascribed to the emerging legacies of colonial state formation processes, which created failed state entities which are unable to produce public goods for all its citizens because of its inability to maintain a monopoly of violence whilst maintain full administrative control over its territory. This inability results in an increase in the vulnerability of state and non-state actors. In response to these vulnerabilities, both state and non-state actors established a range of parallel political, economic and military structures. These structures in turn made use of both network and resource capacities to create an environment where politics are economised and conflict is commercialised, in order to mitigate the impacts of state failure and the inability to produce public goods. The result of the creation of an environment where politics are economised and conflict is commercialised, is the creation of incentives, structures and processes to ensure that conflict and associated conditions of instability are sustained in order to ensure primitive accumulation of wealth and resources. Based on the core theoretical proposition of the proposed theory, the study also presents a broad policy framework for dismantling war economies. In broad terms the framework proposes an integrated state-building process, based on a range of policy mechanisms aimed at maintaining a monopoly over violence, increasing administrative control, dismantling conflict networks and ensuring effective and efficient resource management.
- Full Text:
- Date Issued: 2015
A sociological analysis of biodiversity management in Nigeria
- Authors: Obayi, Bennycharles A
- Date: 2015
- Subjects: Collective behavior , Sustainable biodiversity -- Nigeria , Biodiversity conservation -- Nigeria
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/5277 , vital:20835
- Description: The central thesis of this study addresses biodiversity challenges from a social relations perspective. This is viewed from the standpoint of enhancing sustainable bioresource-use systems from a behaviour change departure. The study reviewed the activities of organisations in Nigeria which focus on bioresource management. The review focused on how the organisations view, conceive and implement activities which aim to address biodiversity loss emphasising how these aspects inform the concept of programme design, planning and implementation. The strategies were weighed against theories and techniques in behaviour change. The study argues that it should be recognised that the challenges of biodiversity loss have a strong relationship with how a society is socially constructed, and that addressing the challenges will require a systematic approach aimed at social construction, using efficient techniques to ensure behaviour change. The objective of the study was to acquire insight on how programmes which aim at addressing biodiversity loss in Nigeria approached behaviour change towards sustainable bioresource-use practise. The study captured these insights in a set of themes which provided an improved analysis on the dynamics of behaviour change and biodiversity management in Nigeria as well as extrapolated these findings to articulate new ideas on how to address the challenges of biodiversity loss in Nigeria. Through analysing basic suppositions and exposing contradictions, social science disciplines examine the credibility of arguments and key concepts that commonly remain unquestioned. Based on this premise, critical assumptions on biodiversity management were challenged by the study. Furthermore, the study articulated questions which have been raised in recent years from a variety of social science perspectives on biodiversity management concerns. The study postulated the need for biodiversity management to be approached from a social-construct perspective in rethinking the discourse on unsustainable bioresource-use patterns. The thesis derives from an eco-sociology framework rooted in human interaction analysis, which is connected with approaches in the social science of functionalism and behaviourism. The concepts and ideas discussed in the thesis lay out the main dimensions relevant to the discourse on behaviour change-biodiversity management. The study’s conceptual and theoretical underpinning discussed biodiversity management concerns from a global context and narrowed the discussion down to country specific contexts. Within these contexts, the study discussed issues of policies, legal systems, political and social systems, practices and programme activities, as part of management concerns. The study compiled relevant views on conservation and protection practises which were in line with internationally accepted norms and practises on biodiversity management. It highlights the challenges of current practises which emphasise strengthening of legal frameworks, policies and practises, and which criminalise actions that contravene ideally-construed conservation precepts as best models of addressing biodiversity loss. It further discussed the emphasis placed on protected-area systems as the main model of biodiversity conservation and argued on the need to rethink the approach within the Nigerian context. The study articulates the role of sociology in ecological discourse and argues that although the knowledge gained by physical and biological sciences are essential in addressing ecological challenges, however, they are not sufficient to understand the driving forces underlying ecological challenges and the phenomenon fundamental to understanding trends and patterns of human factors in biodiversity loss. The study was explored within the methodological framework of phenomenology as the underpinning paradigm using a qualitative approach for analysis. The layouts of the thesis ensure that the research moves from theoretical and conceptual reflections to the actualities of lived realities and situated practices embedded in biodiversity management in Nigeria. The conceptual inclination for the theoretical base for the study analysis was postulated, which articulate the study’s scientific and empirical contributions. The survey method reflects exploratory analytical inquiry which supported the study’s methodological considerations. This was based on the specific data chosen for review, which was informed by the selected organisation’s application of social-construct concepts. Considered from a national perspective, the study assumed that issues of biodiversity management concerns were not to be separated from everyday social realities and the larger social challenges. In view of this consideration, the study analysis looked at historical, political and socio-economic backdrops in Nigeria, which reflected on bioresource-use practises. These are relevant to understand the dynamics and interplay of culture and values in bioresource-use patterns. The study builds on diverse arrays of global frameworks to integrate the major findings of the study. These were compared with related and different dimensions as well as existing theories of human-bioresource interactions. The first aspect of the empirical analysis explored conceptual dimensions which raised questions concerning perceptions of reality and social values that were linked to the strategies of social-constructs expressed through policies, plans and practices. The study’s fundamental empirical dimension explored the forms in which programmes and social institutions were relevant in ensuring behaviour change towards sustainable bioresource-use practise. The analytical sequences observed trends which support facilitation of social change through behaviour change. Another aspect of the empirical analysis focused on revealing the processional dynamics of programme activities to achieve set objectives. This was analysed from the methodical perspective of how the processes were monitored and measured in order to achieve anticipated outcomes. The study summarised the findings and the outcomes by outlining the themes which emerged from the research. The study analysis argued that the ideals of social interventions cannot be different from a society’s inherent and attributed meanings to realities, as well as how they engage with their everyday realities.
- Full Text:
- Date Issued: 2015
- Authors: Obayi, Bennycharles A
- Date: 2015
- Subjects: Collective behavior , Sustainable biodiversity -- Nigeria , Biodiversity conservation -- Nigeria
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/5277 , vital:20835
- Description: The central thesis of this study addresses biodiversity challenges from a social relations perspective. This is viewed from the standpoint of enhancing sustainable bioresource-use systems from a behaviour change departure. The study reviewed the activities of organisations in Nigeria which focus on bioresource management. The review focused on how the organisations view, conceive and implement activities which aim to address biodiversity loss emphasising how these aspects inform the concept of programme design, planning and implementation. The strategies were weighed against theories and techniques in behaviour change. The study argues that it should be recognised that the challenges of biodiversity loss have a strong relationship with how a society is socially constructed, and that addressing the challenges will require a systematic approach aimed at social construction, using efficient techniques to ensure behaviour change. The objective of the study was to acquire insight on how programmes which aim at addressing biodiversity loss in Nigeria approached behaviour change towards sustainable bioresource-use practise. The study captured these insights in a set of themes which provided an improved analysis on the dynamics of behaviour change and biodiversity management in Nigeria as well as extrapolated these findings to articulate new ideas on how to address the challenges of biodiversity loss in Nigeria. Through analysing basic suppositions and exposing contradictions, social science disciplines examine the credibility of arguments and key concepts that commonly remain unquestioned. Based on this premise, critical assumptions on biodiversity management were challenged by the study. Furthermore, the study articulated questions which have been raised in recent years from a variety of social science perspectives on biodiversity management concerns. The study postulated the need for biodiversity management to be approached from a social-construct perspective in rethinking the discourse on unsustainable bioresource-use patterns. The thesis derives from an eco-sociology framework rooted in human interaction analysis, which is connected with approaches in the social science of functionalism and behaviourism. The concepts and ideas discussed in the thesis lay out the main dimensions relevant to the discourse on behaviour change-biodiversity management. The study’s conceptual and theoretical underpinning discussed biodiversity management concerns from a global context and narrowed the discussion down to country specific contexts. Within these contexts, the study discussed issues of policies, legal systems, political and social systems, practices and programme activities, as part of management concerns. The study compiled relevant views on conservation and protection practises which were in line with internationally accepted norms and practises on biodiversity management. It highlights the challenges of current practises which emphasise strengthening of legal frameworks, policies and practises, and which criminalise actions that contravene ideally-construed conservation precepts as best models of addressing biodiversity loss. It further discussed the emphasis placed on protected-area systems as the main model of biodiversity conservation and argued on the need to rethink the approach within the Nigerian context. The study articulates the role of sociology in ecological discourse and argues that although the knowledge gained by physical and biological sciences are essential in addressing ecological challenges, however, they are not sufficient to understand the driving forces underlying ecological challenges and the phenomenon fundamental to understanding trends and patterns of human factors in biodiversity loss. The study was explored within the methodological framework of phenomenology as the underpinning paradigm using a qualitative approach for analysis. The layouts of the thesis ensure that the research moves from theoretical and conceptual reflections to the actualities of lived realities and situated practices embedded in biodiversity management in Nigeria. The conceptual inclination for the theoretical base for the study analysis was postulated, which articulate the study’s scientific and empirical contributions. The survey method reflects exploratory analytical inquiry which supported the study’s methodological considerations. This was based on the specific data chosen for review, which was informed by the selected organisation’s application of social-construct concepts. Considered from a national perspective, the study assumed that issues of biodiversity management concerns were not to be separated from everyday social realities and the larger social challenges. In view of this consideration, the study analysis looked at historical, political and socio-economic backdrops in Nigeria, which reflected on bioresource-use practises. These are relevant to understand the dynamics and interplay of culture and values in bioresource-use patterns. The study builds on diverse arrays of global frameworks to integrate the major findings of the study. These were compared with related and different dimensions as well as existing theories of human-bioresource interactions. The first aspect of the empirical analysis explored conceptual dimensions which raised questions concerning perceptions of reality and social values that were linked to the strategies of social-constructs expressed through policies, plans and practices. The study’s fundamental empirical dimension explored the forms in which programmes and social institutions were relevant in ensuring behaviour change towards sustainable bioresource-use practise. The analytical sequences observed trends which support facilitation of social change through behaviour change. Another aspect of the empirical analysis focused on revealing the processional dynamics of programme activities to achieve set objectives. This was analysed from the methodical perspective of how the processes were monitored and measured in order to achieve anticipated outcomes. The study summarised the findings and the outcomes by outlining the themes which emerged from the research. The study analysis argued that the ideals of social interventions cannot be different from a society’s inherent and attributed meanings to realities, as well as how they engage with their everyday realities.
- Full Text:
- Date Issued: 2015
An exploration of perceptions, adaptive capacity and food security in the Ngqushwa local municipality, Eastern Cape, South Africa
- Authors: Mazinyo, Sonwabo Perez
- Date: 2015
- Subjects: Food security -- South Africa -- Eastern Cape Climatic changes -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/19043 , vital:40107
- Description: Approximately sixty percent of Africans depend on rainfed agriculture for their livelihoods. South Africa is evidenced to be susceptible to inclement climate which impacts on rural livelihoods as well as on farming systems. While South Africa is considered to be food sufficient, it is estimated that approximately 35percent of the population is vulnerable to food insecurity. Therefore with the application of surveys and interviews this study investigates the factors influencing household, subsistence and small-scale farmer perceptions of vulnerability to climate variability as well as the determinants of adaptive capacity. A sample of 308 households is surveyed and four focus group discussions are administered in Ngqushwa Local Municipality as a case study. Furthermore, the study also focuses on the biophysical changes or factors (scientific analysis of the prevailing climatic regimes–rainfall trends); the interrogation of the impact of food systems on both food prices as well as its implications on food sovereignty. The study also interrogates the relationship between crop yield and rainfall data over a 30-year period. Therefore the study adopts a mixed method approach to ensure triangulation. The study finds that rural communities are able to perceive climate variability and its related changes as well as its negative impact on crop production, food access and availability. The perceived rainfall trends also corroborate this Pearson product-moment correlation coefficient reveals that there is a strong correlation between crop yields and rainfall (r = 0.69). Meteorological analyses also show that the rainfall trend has been significantly variable over 112 years (1900 - 2011) with several dry spells threatening the subsistence and small-scale farmers’ sustainable livelihoods. The food systems pose threats to food safety, food security and historical food sovereignty for the rural community of Ngqushwa Local Municipality. Adaptive capacity is greatly impaired by the lack of co-ordination of adaptation strategies, which communally benefit the majority of the farming respondents in the study area. Therefore vulnerability to climate variability impacts on the ability of the respondents to achieve food security. The study also finds that there is perceived competition between the farmers and wild life for the natural resources. The respondents’ perception is that climate variability and change is responsible for such competition. The study recommends that the national, provincial and local governments must foster a new food production model that is not based on the agro-business model and its attendant technologies but on one that is based on robust agro-ecological farming techniques which enhance adaptive capacity; which foster food safety; which promote food sovereignty; and which reduce vulnerability in a sustainable manner. Given the extent of climate variability in the study area the restoration of the NLM weather station infrastructure can also aid the farmers in taking advantage of a robust early warning system for better estimation of climate trends which enhance crop production.
- Full Text:
- Date Issued: 2015
- Authors: Mazinyo, Sonwabo Perez
- Date: 2015
- Subjects: Food security -- South Africa -- Eastern Cape Climatic changes -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/19043 , vital:40107
- Description: Approximately sixty percent of Africans depend on rainfed agriculture for their livelihoods. South Africa is evidenced to be susceptible to inclement climate which impacts on rural livelihoods as well as on farming systems. While South Africa is considered to be food sufficient, it is estimated that approximately 35percent of the population is vulnerable to food insecurity. Therefore with the application of surveys and interviews this study investigates the factors influencing household, subsistence and small-scale farmer perceptions of vulnerability to climate variability as well as the determinants of adaptive capacity. A sample of 308 households is surveyed and four focus group discussions are administered in Ngqushwa Local Municipality as a case study. Furthermore, the study also focuses on the biophysical changes or factors (scientific analysis of the prevailing climatic regimes–rainfall trends); the interrogation of the impact of food systems on both food prices as well as its implications on food sovereignty. The study also interrogates the relationship between crop yield and rainfall data over a 30-year period. Therefore the study adopts a mixed method approach to ensure triangulation. The study finds that rural communities are able to perceive climate variability and its related changes as well as its negative impact on crop production, food access and availability. The perceived rainfall trends also corroborate this Pearson product-moment correlation coefficient reveals that there is a strong correlation between crop yields and rainfall (r = 0.69). Meteorological analyses also show that the rainfall trend has been significantly variable over 112 years (1900 - 2011) with several dry spells threatening the subsistence and small-scale farmers’ sustainable livelihoods. The food systems pose threats to food safety, food security and historical food sovereignty for the rural community of Ngqushwa Local Municipality. Adaptive capacity is greatly impaired by the lack of co-ordination of adaptation strategies, which communally benefit the majority of the farming respondents in the study area. Therefore vulnerability to climate variability impacts on the ability of the respondents to achieve food security. The study also finds that there is perceived competition between the farmers and wild life for the natural resources. The respondents’ perception is that climate variability and change is responsible for such competition. The study recommends that the national, provincial and local governments must foster a new food production model that is not based on the agro-business model and its attendant technologies but on one that is based on robust agro-ecological farming techniques which enhance adaptive capacity; which foster food safety; which promote food sovereignty; and which reduce vulnerability in a sustainable manner. Given the extent of climate variability in the study area the restoration of the NLM weather station infrastructure can also aid the farmers in taking advantage of a robust early warning system for better estimation of climate trends which enhance crop production.
- Full Text:
- Date Issued: 2015
An exploration of perceptions, adaptive capacity and food security in the Ngqushwa local municipality, Eastern Cape, South Africa
- Mazinyo, Sonwabo Perez, Zhou, Leocadia
- Authors: Mazinyo, Sonwabo Perez , Zhou, Leocadia
- Date: 2015
- Subjects: Food security -- South Africa -- Eastern Cape Climatic changes -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/19032 , vital:40106
- Description: Approximately sixty percent of Africans depend on rainfed agriculture for their livelihoods. South Africa is evidenced to be susceptible to inclement climate which impacts on rural livelihoods as well as on farming systems. While South Africa is considered to be food sufficient, it is estimated that approximately 35% of the population is vulnerable to food insecurity. Therefore with the application of surveys and interviews this study investigates the factors influencing household, subsistence and small-scale farmer perceptions of vulnerability to climate variability as well as the determinants of adaptive capacity. A sample of 308 households is surveyed and four focus group discussions are administered in Ngqushwa Local Municipality as a case study. Furthermore, the study also focuses on the biophysical changes or factors (scientific analysis of the prevailing climatic regimes–rainfall trends); the interrogation of the impact of food systems on both food prices as well as its implications on food sovereignty. The study also interrogates the relationship between crop yield and rainfall data over a 30-year period. Therefore the study adopts a mixed method approach to ensure triangulation. The study finds that rural communities are able to perceive climate variability and its related changes as well as its negative impact on crop production, food access and availability. The perceived rainfall trends also corroborate this Pearson product-moment correlation coefficient reveals that there is a strong correlation between crop yields and rainfall (r = 0.69). Meteorological analyses also show that the rainfall trend has been significantly variable over 112 years (1900 - 2011) with several dry spells threatening the subsistence and small-scale farmers’ sustainable livelihoods. The food systems pose threats to food safety, food security and historical food sovereignty for the rural community of Ngqushwa Local Municipality. Adaptive capacity is greatly impaired by the lack of co-ordination of adaptation strategies, which communally benefit the majority of the farming respondents in the study area. Therefore vulnerability to climate variability impacts on the ability of the respondents to achieve food security. The study also finds that there is perceived competition between the farmers and wild life for the natural resources. The respondents’ perception is that climate variability and change is responsible for such competition. The study recommends that the national, provincial and local governments must foster a new food production model that is not based on the agro-business model and its attendant technologies but on one that is based on robust agro-ecological farming techniques which enhance adaptive capacity; which foster food safety; which promote food sovereignty; and which reduce vulnerability in a sustainable manner. Given the extent of climate variability in the study area the restoration of the NLM weather station infrastructure can also aid the farmers in taking advantage of a robust early warning system for better estimation of climate trends which enhance crop production.
- Full Text:
- Date Issued: 2015
- Authors: Mazinyo, Sonwabo Perez , Zhou, Leocadia
- Date: 2015
- Subjects: Food security -- South Africa -- Eastern Cape Climatic changes -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/19032 , vital:40106
- Description: Approximately sixty percent of Africans depend on rainfed agriculture for their livelihoods. South Africa is evidenced to be susceptible to inclement climate which impacts on rural livelihoods as well as on farming systems. While South Africa is considered to be food sufficient, it is estimated that approximately 35% of the population is vulnerable to food insecurity. Therefore with the application of surveys and interviews this study investigates the factors influencing household, subsistence and small-scale farmer perceptions of vulnerability to climate variability as well as the determinants of adaptive capacity. A sample of 308 households is surveyed and four focus group discussions are administered in Ngqushwa Local Municipality as a case study. Furthermore, the study also focuses on the biophysical changes or factors (scientific analysis of the prevailing climatic regimes–rainfall trends); the interrogation of the impact of food systems on both food prices as well as its implications on food sovereignty. The study also interrogates the relationship between crop yield and rainfall data over a 30-year period. Therefore the study adopts a mixed method approach to ensure triangulation. The study finds that rural communities are able to perceive climate variability and its related changes as well as its negative impact on crop production, food access and availability. The perceived rainfall trends also corroborate this Pearson product-moment correlation coefficient reveals that there is a strong correlation between crop yields and rainfall (r = 0.69). Meteorological analyses also show that the rainfall trend has been significantly variable over 112 years (1900 - 2011) with several dry spells threatening the subsistence and small-scale farmers’ sustainable livelihoods. The food systems pose threats to food safety, food security and historical food sovereignty for the rural community of Ngqushwa Local Municipality. Adaptive capacity is greatly impaired by the lack of co-ordination of adaptation strategies, which communally benefit the majority of the farming respondents in the study area. Therefore vulnerability to climate variability impacts on the ability of the respondents to achieve food security. The study also finds that there is perceived competition between the farmers and wild life for the natural resources. The respondents’ perception is that climate variability and change is responsible for such competition. The study recommends that the national, provincial and local governments must foster a new food production model that is not based on the agro-business model and its attendant technologies but on one that is based on robust agro-ecological farming techniques which enhance adaptive capacity; which foster food safety; which promote food sovereignty; and which reduce vulnerability in a sustainable manner. Given the extent of climate variability in the study area the restoration of the NLM weather station infrastructure can also aid the farmers in taking advantage of a robust early warning system for better estimation of climate trends which enhance crop production.
- Full Text:
- Date Issued: 2015
An international study on the influence of intrinsic rewards on the intrinsic motivation, work engagement and retention of employees in non-profit organisations
- Authors: Renard, Michelle
- Date: 2015
- Subjects: Employee motivation , Achievement motivation , Organisational behaviour
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/5148 , vital:20815
- Description: The primary objective of this thesis was to investigate whether intrinsic rewards play a role in the intrinsic motivation, work engagement and retention of employees working within non-profit organisations in Australia, Belgium, South Africa and the United States of America. It therefore served to form a cross-cultural comparison between employees from these four geographically dispersed yet culturally similar countries. A further aim was to determine whether demographic differences occurred across the four constructs studied. In order to achieve these objectives, a theoretical model was constructed to highlight the relationships between the constructs under study. The study made use of both qualitative and quantitative research to achieve the above-mentioned objectives. As a result of the data obtained from 15 qualitative interviews conducted with non-profit employees in Belgium and South Africa, two measuring instruments, namely the Intrinsic Work Rewards Scale and the Intrinsic Work Motivation Scale, were developed to assess intrinsic rewards and intrinsic motivation respectively. These measuring instruments were qualitatively piloted on a sample of academics and non-profit employees, and were translated from English into Dutch for use on the Belgian sample. Once these instruments had been refined, they were combined with instruments to measure work engagement and intention to quit to form a composite questionnaire. This questionnaire was completed electronically by 587 non-profit employees from the four countries under study. Data analysis was conducted in the form of descriptive and inferential statistics, including frequency tables, Cronbach’s alpha testing, exploratory and confirmatory factor analysis, Pearson’s Product Moment Correlations, chi-square tests, t-tests, analysis of variance and structural equation modelling. The quantitative findings showed that intrinsic rewards lead to higher levels of intrinsic motivation, which in turn causes higher levels of work engagement and lower levels of intention to quit. Intrinsic rewards were also found directly to predict a reduction in employees’ intentions to quit their non-profit organisations, and work engagement directly predicted an increase in intention to quit. From a cross-cultural perspective, practically significant inter-country differences were discovered across the intrinsic rewards of meaningful work and challenging work; across intrinsic motivation and its three dimensions (personal connection to one’s work, personal desire to make a difference, and personal desire to perform); and across work engagement and its three factors (absorption, dedication and vigour). In addition to these inter-country results, age and job level differences were discovered across the four constructs under study, together with significant correlations between the four constructs. The Intrinsic Work Rewards Scale and the Intrinsic Work Motivation Scale were successfully validated in both English and Dutch in this study, with a number of forms of validity being confirmed through factor analyses and correlations. Reliability was proven through satisfactory Cronbach’s alpha values being obtained for both language versions of the instruments. These results theoretically contribute to literature pertaining to intrinsic rewards and intrinsic motivation as a result of the development of two measuring instruments that were empirically validated to assess these constructs. Furthermore, the results make a valuable contribution to the field of rewards management globally. This study’s findings provide evidence for causal relationships between four constructs not previously tested empirically, specifically within Australia, Belgium, South Africa and the United States of America. Consequently, this study’s results hold important implications for the management of non-profit employees worldwide.
- Full Text:
- Date Issued: 2015
- Authors: Renard, Michelle
- Date: 2015
- Subjects: Employee motivation , Achievement motivation , Organisational behaviour
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/5148 , vital:20815
- Description: The primary objective of this thesis was to investigate whether intrinsic rewards play a role in the intrinsic motivation, work engagement and retention of employees working within non-profit organisations in Australia, Belgium, South Africa and the United States of America. It therefore served to form a cross-cultural comparison between employees from these four geographically dispersed yet culturally similar countries. A further aim was to determine whether demographic differences occurred across the four constructs studied. In order to achieve these objectives, a theoretical model was constructed to highlight the relationships between the constructs under study. The study made use of both qualitative and quantitative research to achieve the above-mentioned objectives. As a result of the data obtained from 15 qualitative interviews conducted with non-profit employees in Belgium and South Africa, two measuring instruments, namely the Intrinsic Work Rewards Scale and the Intrinsic Work Motivation Scale, were developed to assess intrinsic rewards and intrinsic motivation respectively. These measuring instruments were qualitatively piloted on a sample of academics and non-profit employees, and were translated from English into Dutch for use on the Belgian sample. Once these instruments had been refined, they were combined with instruments to measure work engagement and intention to quit to form a composite questionnaire. This questionnaire was completed electronically by 587 non-profit employees from the four countries under study. Data analysis was conducted in the form of descriptive and inferential statistics, including frequency tables, Cronbach’s alpha testing, exploratory and confirmatory factor analysis, Pearson’s Product Moment Correlations, chi-square tests, t-tests, analysis of variance and structural equation modelling. The quantitative findings showed that intrinsic rewards lead to higher levels of intrinsic motivation, which in turn causes higher levels of work engagement and lower levels of intention to quit. Intrinsic rewards were also found directly to predict a reduction in employees’ intentions to quit their non-profit organisations, and work engagement directly predicted an increase in intention to quit. From a cross-cultural perspective, practically significant inter-country differences were discovered across the intrinsic rewards of meaningful work and challenging work; across intrinsic motivation and its three dimensions (personal connection to one’s work, personal desire to make a difference, and personal desire to perform); and across work engagement and its three factors (absorption, dedication and vigour). In addition to these inter-country results, age and job level differences were discovered across the four constructs under study, together with significant correlations between the four constructs. The Intrinsic Work Rewards Scale and the Intrinsic Work Motivation Scale were successfully validated in both English and Dutch in this study, with a number of forms of validity being confirmed through factor analyses and correlations. Reliability was proven through satisfactory Cronbach’s alpha values being obtained for both language versions of the instruments. These results theoretically contribute to literature pertaining to intrinsic rewards and intrinsic motivation as a result of the development of two measuring instruments that were empirically validated to assess these constructs. Furthermore, the results make a valuable contribution to the field of rewards management globally. This study’s findings provide evidence for causal relationships between four constructs not previously tested empirically, specifically within Australia, Belgium, South Africa and the United States of America. Consequently, this study’s results hold important implications for the management of non-profit employees worldwide.
- Full Text:
- Date Issued: 2015
An investigation of the effect of co-solvents on the hydrothermal liquefaction of microalgae biomass
- Authors: Nongauza, Sinethemba Aubrey
- Date: 2015
- Subjects: Biomass chemicals Microalgae -- Biotechnology , Supercritical fluids Solvents
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/21667 , vital:29731
- Description: The study introduces and demonstrates the viability of the continuous flow reactor (CFR) system for the production of bio-crude oil (BCO) from wet microalgae. Preliminary experiments conducted in the CFR system in hot compressed water (HCW) were successful in converting wet microalgae into liquid BCO. However, the synthesis and aggregation of high boiling point (HBP) components of BCO and the accumulation of char in the tubular piping of CFR system were identified as the limiting factor to the viability of the system. The aggregation of HBP components and the accumulation of char result to system blockage which prevents the continuous flow of the liquefaction product mixture in the CFR system. Inhibiting the reactions leading to the formation of HBP components and char will improve the performance of the CFR system. Therefore, the study seeks to incorporate co-solvents in the liquefaction reaction media in an attempt to inhibit or minimize the prevalence of HBP components of BCO. As such, different co-solvents were screened for their influence on improving the quality of BCO with respect to its boiling point profile (BPP), initial and final boiling point, as well as the amount of char recovered from each experiment. Only one co-solvent was chosen for further exploration in the CFR system. Batch liquefaction reactor’s (BLR) made up of stainless steel were used to carry out the co-solvent screening experiments. These experiments were carried out at a constant temperature (280 °C), pressure (75 bar), and co-solvent concentration (10 wt.%), at varying residence times. Solvent extraction with dichloromethane (DCM) was performed on the liquefaction product mixture to separate the products, viz. BCO, char and water soluble components. The extracted BCO was analysed through simulated distillation (SimDis) to obtain the BPP. The BPP properties of the BCO samples, from different liquefaction media, and the amount of char recovered were highly influenced by the addition of a co-solvent. The final boiling point (FBP) of tetralin, heptane, and n-octanol BCO products were significantly reduced to below 500 °C for all tested residence times except at 20 minutes. The residence time also proved to be influential in the processing of wet microalgae. n-Octanol was selected as the optimal performing co-solvent and was used for the continuous liquefaction of wet microalgae in the CFR system. The CFR system was modified by adding a co-solvent feed line into the continuous system since n-octanol was insoluble in water. The n-octanol pump was set at different flow rates, 0.2, 0.3, and 0.4 g/min, which resulted in a concentration of about 10 wt.% in the reactor feed. The concentration of n-octanol had a significant influence on the BPP of BCO components. The FBP’s were reduced with an increase in n-octanol concentration. The initial boiling point (IBP) of n-octanol BCO was increased to just above 100 °C which was required for the stability of the BCO product. The components of BCO were identified by GCMS. n-Octanol also proved to affect the composition of the BCO with respect to its components. HCW BCO components were significantly different from those identified from n-octanol BCO. A second co-solvent (tetralin) was used to prove whether the difference on the components of BCO was affected by n-octanol. The results proved that indeed the addition of different solvents in liquefaction reaction media favours the formation of different components. The amount of char formed was also reduced when using a co-solvent. A decrease in the oxygen/nitrogen compounds was also observed in the presence of a co-solvent, thus improving BCO properties.
- Full Text:
- Date Issued: 2015
An investigation of the effect of co-solvents on the hydrothermal liquefaction of microalgae biomass
- Authors: Nongauza, Sinethemba Aubrey
- Date: 2015
- Subjects: Biomass chemicals Microalgae -- Biotechnology , Supercritical fluids Solvents
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10948/21667 , vital:29731
- Description: The study introduces and demonstrates the viability of the continuous flow reactor (CFR) system for the production of bio-crude oil (BCO) from wet microalgae. Preliminary experiments conducted in the CFR system in hot compressed water (HCW) were successful in converting wet microalgae into liquid BCO. However, the synthesis and aggregation of high boiling point (HBP) components of BCO and the accumulation of char in the tubular piping of CFR system were identified as the limiting factor to the viability of the system. The aggregation of HBP components and the accumulation of char result to system blockage which prevents the continuous flow of the liquefaction product mixture in the CFR system. Inhibiting the reactions leading to the formation of HBP components and char will improve the performance of the CFR system. Therefore, the study seeks to incorporate co-solvents in the liquefaction reaction media in an attempt to inhibit or minimize the prevalence of HBP components of BCO. As such, different co-solvents were screened for their influence on improving the quality of BCO with respect to its boiling point profile (BPP), initial and final boiling point, as well as the amount of char recovered from each experiment. Only one co-solvent was chosen for further exploration in the CFR system. Batch liquefaction reactor’s (BLR) made up of stainless steel were used to carry out the co-solvent screening experiments. These experiments were carried out at a constant temperature (280 °C), pressure (75 bar), and co-solvent concentration (10 wt.%), at varying residence times. Solvent extraction with dichloromethane (DCM) was performed on the liquefaction product mixture to separate the products, viz. BCO, char and water soluble components. The extracted BCO was analysed through simulated distillation (SimDis) to obtain the BPP. The BPP properties of the BCO samples, from different liquefaction media, and the amount of char recovered were highly influenced by the addition of a co-solvent. The final boiling point (FBP) of tetralin, heptane, and n-octanol BCO products were significantly reduced to below 500 °C for all tested residence times except at 20 minutes. The residence time also proved to be influential in the processing of wet microalgae. n-Octanol was selected as the optimal performing co-solvent and was used for the continuous liquefaction of wet microalgae in the CFR system. The CFR system was modified by adding a co-solvent feed line into the continuous system since n-octanol was insoluble in water. The n-octanol pump was set at different flow rates, 0.2, 0.3, and 0.4 g/min, which resulted in a concentration of about 10 wt.% in the reactor feed. The concentration of n-octanol had a significant influence on the BPP of BCO components. The FBP’s were reduced with an increase in n-octanol concentration. The initial boiling point (IBP) of n-octanol BCO was increased to just above 100 °C which was required for the stability of the BCO product. The components of BCO were identified by GCMS. n-Octanol also proved to affect the composition of the BCO with respect to its components. HCW BCO components were significantly different from those identified from n-octanol BCO. A second co-solvent (tetralin) was used to prove whether the difference on the components of BCO was affected by n-octanol. The results proved that indeed the addition of different solvents in liquefaction reaction media favours the formation of different components. The amount of char formed was also reduced when using a co-solvent. A decrease in the oxygen/nitrogen compounds was also observed in the presence of a co-solvent, thus improving BCO properties.
- Full Text:
- Date Issued: 2015