Critical success factors of information security projects
- Authors: Tshabalala, Obediant
- Date: 2016
- Subjects: Management information systems Business enterprises -- Computer networks -- Security measures Information technology projects -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/10397 , vital:26746
- Description: The research shows the critical success factors when implementing information security projects. Many Information security projects in the past have not been successful because these factors were not identified and emphasised effectively. By identifying these factors the research basically presents a model by which information security projects can be executed with guaranteed success. The factors identified during the study cover the following streams: top management commitment as a factor of success; accountability as a factor of success; responsibility as a factor of success; awareness as a factor of success and an information security policy as a factor of success. For the empirical study, a physical questionnaire was administrated to a pool of experts in project management and information security. The study consisted of 60 participants who were verified to have minimum requirements core for questionnaire completion. The questionnaire requested for biological information of the participants and their perceived relations (based on their experience) between project success versus accountability, information security project success versus responsibilities, information security project success versus training & awareness, information security project success versus top management commitment and information security project success versus information security policy. The participants’ responses were structured according to a Likert-type scale. Participants had to indicate the extent to which they agreed with each of the statements in the questionnaire. The responses obtained from the survey were presented and analysed. The researcher observed in this study that information security projects are so specific that critical success factors need to be emphasised from project inception. With the identified critical success factors, the researcher recommends that a project methodology be structured to include these factors so that there is a standard in running information security projects successfully. The researcher also identified that amongst the critical success factors identified, there are some that need to be emphasised more than the others due to their level of importance in such projects.
- Full Text:
- Date Issued: 2016
- Authors: Tshabalala, Obediant
- Date: 2016
- Subjects: Management information systems Business enterprises -- Computer networks -- Security measures Information technology projects -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/10397 , vital:26746
- Description: The research shows the critical success factors when implementing information security projects. Many Information security projects in the past have not been successful because these factors were not identified and emphasised effectively. By identifying these factors the research basically presents a model by which information security projects can be executed with guaranteed success. The factors identified during the study cover the following streams: top management commitment as a factor of success; accountability as a factor of success; responsibility as a factor of success; awareness as a factor of success and an information security policy as a factor of success. For the empirical study, a physical questionnaire was administrated to a pool of experts in project management and information security. The study consisted of 60 participants who were verified to have minimum requirements core for questionnaire completion. The questionnaire requested for biological information of the participants and their perceived relations (based on their experience) between project success versus accountability, information security project success versus responsibilities, information security project success versus training & awareness, information security project success versus top management commitment and information security project success versus information security policy. The participants’ responses were structured according to a Likert-type scale. Participants had to indicate the extent to which they agreed with each of the statements in the questionnaire. The responses obtained from the survey were presented and analysed. The researcher observed in this study that information security projects are so specific that critical success factors need to be emphasised from project inception. With the identified critical success factors, the researcher recommends that a project methodology be structured to include these factors so that there is a standard in running information security projects successfully. The researcher also identified that amongst the critical success factors identified, there are some that need to be emphasised more than the others due to their level of importance in such projects.
- Full Text:
- Date Issued: 2016
Crop rotation and crop residue management effects under no till on the soil quality of two ecotopes in the Eastern Cape, South Africa
- Authors: Isaac, Gura
- Date: 2016
- Subjects: Crop rotation Crops and soils Soil fertility
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2934 , vital:28144
- Description: The degradation of soil quality due to undesirable farming practices has reached alarming scales in the Eastern Cape and this has had negative repercussions on soil productivity and the environment in general. There is growing evidence that conservation agriculture (CA) practices involving minimal mechanical disturbance, maintaining permanent surface cover and embracing diverse crop rotations increase soil organic carbon (SOC) and therefore has potential to mitigate soil quality deterioration. A study was carried out at two sites located in two ecotopes to investigate the effects of crop residue retention and crop rotations in a no till system on overall soil quality using the Soil Management Assessment Framework (SMAF) as the soil quality assessment tool. The CA study trials were laid out in 2012 at two different locations, one at the Phandulwazi Agricultural High school within the Phandulwazi Jozini ecotope and the other one at University of Fort Hare Research Farm within the Alice Jozini ecotope. The experiment was laid out as a split-split plot arrangement in a randomized complete block design with three replicates. Tillage treatments were applied on the main plots while crop rotation treatments were applied as subplots. Crop residue retention treatments were applied as sub-sub plots. The rotational treatments were maize-fallow-maize (MFM), maize-fallow-soybean (MFS), maize-wheat-maize (MWM) and maize-wheat-soybean (MWS). The initial assessment of the overall soil quality of the two ecotopes using the SMAF soil quality index (SQI) revealed that the soils at the Alice site were functioning at 80% while the soils at the Phandulwazi site were functioning at 79 percent of their optimum capacity. The slight difference in the soil quality of the two ecotopes could be attributed to their different soil organic C contents where the Alice Jozini ecotope had significantly higher soil organic C contents than the Phandulwazi Jozini ecotope. After 3 years of continuous treatment application, crop residue retention significantly improved most of the measured soil quality parameters. Generally across the sites, more soil organic C, microbial biomass C (MBC), ß-glucosidase (BG) activity, mineral N, extractable P and K, Cu, Zn, Mn, Fe, and macro-aggregates were recorded in treatments where crop residues were retained. Crop rotations alone did not have a significant impact on most of the measured soil quality indicators. The crop rotations influenced significantly the availability of mineral N across the two sites, highlighting the importance of using a legume in rotations on available N for the subsequent crops. Most of the measured soil attributes were not significantly influenced after 3 years of continuously applying combined treatment of CA components. Mineral N (NO3 + NH4), K, Zn and Fe were significantly impacted on by the interactions of CA components at the Phandulwazi site, while N, Cu, Zn and Mn were significantly increased at the Alice site. Low response of SOC to combined CA treatments in the short-term prompted the need to examine treatment effects on individual soil carbon fractions. The interaction of crop rotation and residue management techniques were significant on the fine particulate organic matter – C fractions and microbially respired C. These soil C fractions were more sensitive to short-term treatments of combined CA components than SOC and MBC, therefore they can be used as short-term indicators of CA effects on SOM. Soil organic carbon, MBC, extractable P and K, soil pH, EC, b, AGS (aggregate stability) and BG activity were measured and the Soil Management Assessment Framework (SMAF) used to calculate soil quality index (SQI) values for each treatment. The combination of the crop rotations with crop residue retention showed the potential to significantly improve SQI values in the long term. The highest soil quality improvement at both sites was achieved by the maize-wheat-soybean (MWS) rotation with crop residue retention.
- Full Text:
- Date Issued: 2016
- Authors: Isaac, Gura
- Date: 2016
- Subjects: Crop rotation Crops and soils Soil fertility
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2934 , vital:28144
- Description: The degradation of soil quality due to undesirable farming practices has reached alarming scales in the Eastern Cape and this has had negative repercussions on soil productivity and the environment in general. There is growing evidence that conservation agriculture (CA) practices involving minimal mechanical disturbance, maintaining permanent surface cover and embracing diverse crop rotations increase soil organic carbon (SOC) and therefore has potential to mitigate soil quality deterioration. A study was carried out at two sites located in two ecotopes to investigate the effects of crop residue retention and crop rotations in a no till system on overall soil quality using the Soil Management Assessment Framework (SMAF) as the soil quality assessment tool. The CA study trials were laid out in 2012 at two different locations, one at the Phandulwazi Agricultural High school within the Phandulwazi Jozini ecotope and the other one at University of Fort Hare Research Farm within the Alice Jozini ecotope. The experiment was laid out as a split-split plot arrangement in a randomized complete block design with three replicates. Tillage treatments were applied on the main plots while crop rotation treatments were applied as subplots. Crop residue retention treatments were applied as sub-sub plots. The rotational treatments were maize-fallow-maize (MFM), maize-fallow-soybean (MFS), maize-wheat-maize (MWM) and maize-wheat-soybean (MWS). The initial assessment of the overall soil quality of the two ecotopes using the SMAF soil quality index (SQI) revealed that the soils at the Alice site were functioning at 80% while the soils at the Phandulwazi site were functioning at 79 percent of their optimum capacity. The slight difference in the soil quality of the two ecotopes could be attributed to their different soil organic C contents where the Alice Jozini ecotope had significantly higher soil organic C contents than the Phandulwazi Jozini ecotope. After 3 years of continuous treatment application, crop residue retention significantly improved most of the measured soil quality parameters. Generally across the sites, more soil organic C, microbial biomass C (MBC), ß-glucosidase (BG) activity, mineral N, extractable P and K, Cu, Zn, Mn, Fe, and macro-aggregates were recorded in treatments where crop residues were retained. Crop rotations alone did not have a significant impact on most of the measured soil quality indicators. The crop rotations influenced significantly the availability of mineral N across the two sites, highlighting the importance of using a legume in rotations on available N for the subsequent crops. Most of the measured soil attributes were not significantly influenced after 3 years of continuously applying combined treatment of CA components. Mineral N (NO3 + NH4), K, Zn and Fe were significantly impacted on by the interactions of CA components at the Phandulwazi site, while N, Cu, Zn and Mn were significantly increased at the Alice site. Low response of SOC to combined CA treatments in the short-term prompted the need to examine treatment effects on individual soil carbon fractions. The interaction of crop rotation and residue management techniques were significant on the fine particulate organic matter – C fractions and microbially respired C. These soil C fractions were more sensitive to short-term treatments of combined CA components than SOC and MBC, therefore they can be used as short-term indicators of CA effects on SOM. Soil organic carbon, MBC, extractable P and K, soil pH, EC, b, AGS (aggregate stability) and BG activity were measured and the Soil Management Assessment Framework (SMAF) used to calculate soil quality index (SQI) values for each treatment. The combination of the crop rotations with crop residue retention showed the potential to significantly improve SQI values in the long term. The highest soil quality improvement at both sites was achieved by the maize-wheat-soybean (MWS) rotation with crop residue retention.
- Full Text:
- Date Issued: 2016
Crop yields from organic and conventional farming systems in South Africa's Southern Cape
- Authors: Mashele, N'wa-Jama
- Date: 2016
- Subjects: Organic farming -- South Africa Sustainable agriculture -- South Africa Agricultural systems -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/11637 , vital:26946
- Description: South Africa (SA) is food secure on a national level, however citizens in rural and marginalised areas face household food insecurity due to lack of access to this food. South Africa has low fertility soils and scarce water resources. Climate change reports of unpredictable weather conditions will further exacerbate these challenges. The majority of the agricultural production methods in SA are industrialised and rely heavily on external inputs. Alternative agricultural production methods which are environmentally less taxing, are affordable and yield nutritious food, need to be investigated and adopted. A long-term trial investigating the differences in yields between conventional and organic farming systems was established at the NMMU George Saasveld campus. A baseline study preceded the cropping seasons to establish pre-treatment soil conditions before the two farming systems were be implemented. The trial was a randomized complete block design split into organic, conventional and control plots. In the first cropping season (summer) three crops cabbage (Brassica oleracea var. capitata), sweet potato (Ipomea batatas) and cowpea (vigna ungucuilata) were planted under the different treatments. Soil fertility changes after application of chemical and organic fertilizer were measured. Soil pH and phosphorus increased whilst potassium and soil carbon decreased from baseline levels. The organic plots were found to have higher soil pH, potassium and carbon, whilst P was higher in the conventional plots. The organic cabbages had a yield 12% lower than conventional cabbages, organic cowpeas were 51% lower than conventional cowpeas. Baboons damaged sweet potato plots before maturity. Broccoli (Brassica oleracea var. italica), radish (Raphanus sativa) and green pea (Pisum sativum) were planted in the second cropping season (winter). Organic broccoli yields were 51% lower than conventional broccoli, organic green peas were 18 % lower than conventional green peas. The organic radish yields were 36% lower than conventional yields and this was statically significant. The yield differences were statically significant between control and conventional cabbages (25%) and broccolis (68%). The results indicate that there is on average an initial 25% yield difference between organic and conventional farming systems. Similar studies have shown that the yield gap can be reduced within three to four years. This study presents preliminary results of trials that are to continue for ten years, during which time the yield differences may vary.
- Full Text:
- Date Issued: 2016
- Authors: Mashele, N'wa-Jama
- Date: 2016
- Subjects: Organic farming -- South Africa Sustainable agriculture -- South Africa Agricultural systems -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/11637 , vital:26946
- Description: South Africa (SA) is food secure on a national level, however citizens in rural and marginalised areas face household food insecurity due to lack of access to this food. South Africa has low fertility soils and scarce water resources. Climate change reports of unpredictable weather conditions will further exacerbate these challenges. The majority of the agricultural production methods in SA are industrialised and rely heavily on external inputs. Alternative agricultural production methods which are environmentally less taxing, are affordable and yield nutritious food, need to be investigated and adopted. A long-term trial investigating the differences in yields between conventional and organic farming systems was established at the NMMU George Saasveld campus. A baseline study preceded the cropping seasons to establish pre-treatment soil conditions before the two farming systems were be implemented. The trial was a randomized complete block design split into organic, conventional and control plots. In the first cropping season (summer) three crops cabbage (Brassica oleracea var. capitata), sweet potato (Ipomea batatas) and cowpea (vigna ungucuilata) were planted under the different treatments. Soil fertility changes after application of chemical and organic fertilizer were measured. Soil pH and phosphorus increased whilst potassium and soil carbon decreased from baseline levels. The organic plots were found to have higher soil pH, potassium and carbon, whilst P was higher in the conventional plots. The organic cabbages had a yield 12% lower than conventional cabbages, organic cowpeas were 51% lower than conventional cowpeas. Baboons damaged sweet potato plots before maturity. Broccoli (Brassica oleracea var. italica), radish (Raphanus sativa) and green pea (Pisum sativum) were planted in the second cropping season (winter). Organic broccoli yields were 51% lower than conventional broccoli, organic green peas were 18 % lower than conventional green peas. The organic radish yields were 36% lower than conventional yields and this was statically significant. The yield differences were statically significant between control and conventional cabbages (25%) and broccolis (68%). The results indicate that there is on average an initial 25% yield difference between organic and conventional farming systems. Similar studies have shown that the yield gap can be reduced within three to four years. This study presents preliminary results of trials that are to continue for ten years, during which time the yield differences may vary.
- Full Text:
- Date Issued: 2016
Cultural events hosted in Nelson Mandela Bay
- Boucher, Sasha Marilyn, Calitz, André
- Authors: Boucher, Sasha Marilyn , Calitz, André
- Date: 2016
- Subjects: Heritage tourism Special events -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11823 , vital:26976
- Description: Purpose – This study seeks to explore residents’ attitudes towards cultural events in Nelson Mandela Bay (NMB), South Africa. The study further discusses the cultural values and social realities of the diverse socio-economic landscape inherent to the city. Equally, the extent of stakeholder involvement has been reflected throughout the study as an indispensable requirement towards sustainable tourism in the city. The study presents that customising cultural events according to the cross-cultural typology has far-reaching consequences in enhancing the image of NMB and induces stakeholder engagement. This study is based on the notion of Social Capital and Stakeholder theory and draws on the multi-cultural phenomenon as the thrust of the study is based on attracting residents’ to cultural events. The literature study indicated that the concept of Social Capital and stakeholder collaboration are mutually exclusive and empirical analysis indicates a strong relationship between the factors relative to residents’ attitudes. Design/Methodology/Approach – This study is located in the positivism paradigm and comprises literature and exploratory research to examine the supposition between the independent variables and the attitudes of residents’ in the NMB. The independent variables underlined in the proposed model are embedded in the literature undertaken. Equally, the thrust of the study is underpinned in Social Capital theory and the Stakeholder theory and is evident throughout this study. In this study, the convenience sampling and snowball sampling methods were employed to obtain a representative sample of residents from the NMB. A questionnaire was used in this study to solicit responses pertaining to the biographical information and questions relating to the factors of perceived satisfaction of residents in the NMB in relation to cultural events. A total number of 3,659 residents participated in this study. The researcher conducted this study by means of testing the constructs of the measuring instrument employed, as well as providing a causal model of relationships between the independent variables and the residents’ attitudes of cultural events in NMB. Findings – The results confirm the reliability and validity of the scales tested on a sample of 3,659 residents, collected using the questionnaire in Nelson Mandela Bay Metropolitan area. The empirical analysis indicates relationships among the independent factors; Social Capital and Stakeholder Profile, where a Pearson’s correlation of 0.50 exists. Furthermore, descriptive findings indicate that there is an overall positive tendency in attitudes for cultural events in the city. The practical significance as identified in the Cohen’s d test for significance infers that the moderating factors in the conceptual model prove that age, area code, home language, ethnicity and home language exert influence in determining residents’ attitudes in the city. Practical Implications – This study identifies the importance of leveraging the cross-cultural typology underscored the Stakeholder theory. Equally, for destination marketing organisations (DMOs) this study can glean insights in respect of the profile of residents for cultural event marketing and their response as stakeholders in the organisation of a cultural event. Social Implications – This study aims to gain a better understanding of the residents’ attitudes of the cultural events hosted by the NMB, its Social Capital and its relationship with varying demographic niches and cultural-centric insights that align to the ideologies pertaining to global citizenship. Originality/Value – This present study makes a contribution to the theories of Social Capital and Stakeholder theory by investigating its roles in determining residents’ attitudes of cultural events in a city. Moreover, it discusses the role of the factors as inducing variables for residents’ motivation by employing marketing principles related to the unique and emotional selling proposition philosophy. Equally, the study espouses the significance of promoting cultural events to extent that it acts as a platform to promote socio-economic development; employment opportunities, improved living standards, improving city infrastructure and environmental protection of a destination and justifies the expedition of Social Capital on the attitudes of residents’.
- Full Text:
- Date Issued: 2016
- Authors: Boucher, Sasha Marilyn , Calitz, André
- Date: 2016
- Subjects: Heritage tourism Special events -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11823 , vital:26976
- Description: Purpose – This study seeks to explore residents’ attitudes towards cultural events in Nelson Mandela Bay (NMB), South Africa. The study further discusses the cultural values and social realities of the diverse socio-economic landscape inherent to the city. Equally, the extent of stakeholder involvement has been reflected throughout the study as an indispensable requirement towards sustainable tourism in the city. The study presents that customising cultural events according to the cross-cultural typology has far-reaching consequences in enhancing the image of NMB and induces stakeholder engagement. This study is based on the notion of Social Capital and Stakeholder theory and draws on the multi-cultural phenomenon as the thrust of the study is based on attracting residents’ to cultural events. The literature study indicated that the concept of Social Capital and stakeholder collaboration are mutually exclusive and empirical analysis indicates a strong relationship between the factors relative to residents’ attitudes. Design/Methodology/Approach – This study is located in the positivism paradigm and comprises literature and exploratory research to examine the supposition between the independent variables and the attitudes of residents’ in the NMB. The independent variables underlined in the proposed model are embedded in the literature undertaken. Equally, the thrust of the study is underpinned in Social Capital theory and the Stakeholder theory and is evident throughout this study. In this study, the convenience sampling and snowball sampling methods were employed to obtain a representative sample of residents from the NMB. A questionnaire was used in this study to solicit responses pertaining to the biographical information and questions relating to the factors of perceived satisfaction of residents in the NMB in relation to cultural events. A total number of 3,659 residents participated in this study. The researcher conducted this study by means of testing the constructs of the measuring instrument employed, as well as providing a causal model of relationships between the independent variables and the residents’ attitudes of cultural events in NMB. Findings – The results confirm the reliability and validity of the scales tested on a sample of 3,659 residents, collected using the questionnaire in Nelson Mandela Bay Metropolitan area. The empirical analysis indicates relationships among the independent factors; Social Capital and Stakeholder Profile, where a Pearson’s correlation of 0.50 exists. Furthermore, descriptive findings indicate that there is an overall positive tendency in attitudes for cultural events in the city. The practical significance as identified in the Cohen’s d test for significance infers that the moderating factors in the conceptual model prove that age, area code, home language, ethnicity and home language exert influence in determining residents’ attitudes in the city. Practical Implications – This study identifies the importance of leveraging the cross-cultural typology underscored the Stakeholder theory. Equally, for destination marketing organisations (DMOs) this study can glean insights in respect of the profile of residents for cultural event marketing and their response as stakeholders in the organisation of a cultural event. Social Implications – This study aims to gain a better understanding of the residents’ attitudes of the cultural events hosted by the NMB, its Social Capital and its relationship with varying demographic niches and cultural-centric insights that align to the ideologies pertaining to global citizenship. Originality/Value – This present study makes a contribution to the theories of Social Capital and Stakeholder theory by investigating its roles in determining residents’ attitudes of cultural events in a city. Moreover, it discusses the role of the factors as inducing variables for residents’ motivation by employing marketing principles related to the unique and emotional selling proposition philosophy. Equally, the study espouses the significance of promoting cultural events to extent that it acts as a platform to promote socio-economic development; employment opportunities, improved living standards, improving city infrastructure and environmental protection of a destination and justifies the expedition of Social Capital on the attitudes of residents’.
- Full Text:
- Date Issued: 2016
Curriculum in the context of transformation: reframing traditional understandings and practices
- Authors: Voster, Jo-Anne
- Date: 2016
- Language: English
- Type: Book , text
- Identifier: http://hdl.handle.net/10962/59557 , vital:27626
- Description: Curriculum is central to the pedagogic project of the university, and like all aspects of education, it is underpinned by values, beliefs and ideologies. Curriculum choices are made based on what disciplines and professions value and what academic departments and / or individual academics find interesting and believe to be useful for students to learn and know. Decisions about how to teach and assess curriculum knowledge is very often made on the basis of lecturers’ preferences and beliefs about good teaching and learning. At the current conjuncture, academics in South African higher education are also called upon to take into account a number of transformation imperatives when making curriculum choices. The case studies in this collection present examples of how some lecturers at Rhodes University are thinking about curriculum in the context of cur - rent educational concerns and show some of the ways in which they attempt to ensure that greater epistemological access becomes a reality for more students.
- Full Text:
- Date Issued: 2016
- Authors: Voster, Jo-Anne
- Date: 2016
- Language: English
- Type: Book , text
- Identifier: http://hdl.handle.net/10962/59557 , vital:27626
- Description: Curriculum is central to the pedagogic project of the university, and like all aspects of education, it is underpinned by values, beliefs and ideologies. Curriculum choices are made based on what disciplines and professions value and what academic departments and / or individual academics find interesting and believe to be useful for students to learn and know. Decisions about how to teach and assess curriculum knowledge is very often made on the basis of lecturers’ preferences and beliefs about good teaching and learning. At the current conjuncture, academics in South African higher education are also called upon to take into account a number of transformation imperatives when making curriculum choices. The case studies in this collection present examples of how some lecturers at Rhodes University are thinking about curriculum in the context of cur - rent educational concerns and show some of the ways in which they attempt to ensure that greater epistemological access becomes a reality for more students.
- Full Text:
- Date Issued: 2016
Customer satisfaction with the guesthouse experience in Ghana
- Authors: Amoah, Felix
- Date: 2016
- Subjects: Consumer satisfaction -- Ghana , Hospitality industry -- Ghana -- Management , Tourism -- Ghana -- Marketing
- Language: English
- Type: Thesis , Doctoral , DTech
- Identifier: http://hdl.handle.net/10948/6073 , vital:21036
- Description: Guesthouse accommodation plays an important role in Ghana’s hospitality industry and was therefore the focus of this study as little research dealing with guesthouses in Ghana could be found. The number of guesthouses in Ghana continues to grow and they thus represent an important alternative to hotels. However, these establishments seem to perform poorly and face several challenges such as lack of managerial knowledge, insufficiently skilled employees, poor interaction with customers, and criticisms of the provision of low quality service. The main reason for undertaking this research was to provide guesthouse managers in Ghana with information that might assist them in making decisions about the experience they offer. Such knowledge could make this type of accommodation more competitive and eventually help the hospitality sector in Ghana attract tourists and grow. It is imperative that guesthouses focus on the experience they offer, because contemporary tourism and hospitality literature suggest that successful businesses require a shift from functional and financial interests to a more profound focus on total experiences which embody emotional aspects. It is thus argued that, if guesthouse managers in Ghana do not know how their guests perceive their guesthouse experience, they might make costly mistakes and allocate resources to aspects that already provide quality and value in a functional sense, instead of those elements perceived as providing quality and value in the total experience. Two dominating concepts, namely experience quality and experience value, formed the basis of the examination of guests’ experience with the guesthouses in Ghana. In addition, the relationships between the experience and satisfaction were also investigated. Four experience quality dimensions, namely hedonics, peace of mind, involvement, and recognition, and seven value dimensions were examined. The experience value dimensions included atmospherics, enjoyment, entertainment, efficiency, excellence, escape, and economic value. A proportional stratified random sampling procedure was followed to select the guesthouses for the study. Thereafter, a structured questionnaire was distributed to the guesthouse guests selected by means of convenience sampling. Five hundred and forty one useable questionnaires were received. The guesthouse guests formed the primary sampling unit for this study. The results of the empirical study showed a strong positive correlation between all the dimensions of experience quality and experience value, while the factor analysis confirmed that all these dimensions loaded on a single factor. Therefore, experience quality and experience value cannot be separated, and the resulting single multi-dimensional factor was subsequently renamed, overall experience. The results also indicated a positive relationship between hedonics, peace of mind, involvement, recognition, atmospherics, enjoyment, entertainment, efficiency, excellence, escape, economic value, and overall satisfaction. The inferentially established rank-order of the dimensions contributing to satisfaction can guide managers when allocating resources. Overall, atmospherics was ranked first, followed by economic value. Escape was the lowest ranked dimension. In addition, it was found that, except for escape, all the experience dimensions were perceived as basic satisfiers. This implies that guests will be dissatisfied when provision of these dimensions is inadequate. With regard to escape, listed as a performance factor, guests will be satisfied when performance is improved and dissatisfied when performance is low. A positive relationship was also found between overall experience and overall satisfaction. The latter include the likelihood of return and recommending the guesthouse to others. Finally, structural equation modelling confirmed a model representing the 11 experience dimensions (hedonics, peace of mind, involvement, recognition, atmospherics, enjoyment, entertainment, escape, efficiency, excellence, and economic value) and the relationships between overall experience and overall satisfaction pertaining to guesthouses in Ghana.
- Full Text:
- Date Issued: 2016
- Authors: Amoah, Felix
- Date: 2016
- Subjects: Consumer satisfaction -- Ghana , Hospitality industry -- Ghana -- Management , Tourism -- Ghana -- Marketing
- Language: English
- Type: Thesis , Doctoral , DTech
- Identifier: http://hdl.handle.net/10948/6073 , vital:21036
- Description: Guesthouse accommodation plays an important role in Ghana’s hospitality industry and was therefore the focus of this study as little research dealing with guesthouses in Ghana could be found. The number of guesthouses in Ghana continues to grow and they thus represent an important alternative to hotels. However, these establishments seem to perform poorly and face several challenges such as lack of managerial knowledge, insufficiently skilled employees, poor interaction with customers, and criticisms of the provision of low quality service. The main reason for undertaking this research was to provide guesthouse managers in Ghana with information that might assist them in making decisions about the experience they offer. Such knowledge could make this type of accommodation more competitive and eventually help the hospitality sector in Ghana attract tourists and grow. It is imperative that guesthouses focus on the experience they offer, because contemporary tourism and hospitality literature suggest that successful businesses require a shift from functional and financial interests to a more profound focus on total experiences which embody emotional aspects. It is thus argued that, if guesthouse managers in Ghana do not know how their guests perceive their guesthouse experience, they might make costly mistakes and allocate resources to aspects that already provide quality and value in a functional sense, instead of those elements perceived as providing quality and value in the total experience. Two dominating concepts, namely experience quality and experience value, formed the basis of the examination of guests’ experience with the guesthouses in Ghana. In addition, the relationships between the experience and satisfaction were also investigated. Four experience quality dimensions, namely hedonics, peace of mind, involvement, and recognition, and seven value dimensions were examined. The experience value dimensions included atmospherics, enjoyment, entertainment, efficiency, excellence, escape, and economic value. A proportional stratified random sampling procedure was followed to select the guesthouses for the study. Thereafter, a structured questionnaire was distributed to the guesthouse guests selected by means of convenience sampling. Five hundred and forty one useable questionnaires were received. The guesthouse guests formed the primary sampling unit for this study. The results of the empirical study showed a strong positive correlation between all the dimensions of experience quality and experience value, while the factor analysis confirmed that all these dimensions loaded on a single factor. Therefore, experience quality and experience value cannot be separated, and the resulting single multi-dimensional factor was subsequently renamed, overall experience. The results also indicated a positive relationship between hedonics, peace of mind, involvement, recognition, atmospherics, enjoyment, entertainment, efficiency, excellence, escape, economic value, and overall satisfaction. The inferentially established rank-order of the dimensions contributing to satisfaction can guide managers when allocating resources. Overall, atmospherics was ranked first, followed by economic value. Escape was the lowest ranked dimension. In addition, it was found that, except for escape, all the experience dimensions were perceived as basic satisfiers. This implies that guests will be dissatisfied when provision of these dimensions is inadequate. With regard to escape, listed as a performance factor, guests will be satisfied when performance is improved and dissatisfied when performance is low. A positive relationship was also found between overall experience and overall satisfaction. The latter include the likelihood of return and recommending the guesthouse to others. Finally, structural equation modelling confirmed a model representing the 11 experience dimensions (hedonics, peace of mind, involvement, recognition, atmospherics, enjoyment, entertainment, escape, efficiency, excellence, and economic value) and the relationships between overall experience and overall satisfaction pertaining to guesthouses in Ghana.
- Full Text:
- Date Issued: 2016
Cyclodextrin grafted calcium carbonate vaterite particles: efficient system for tailored release of hydrophobic anticancer or hormone drugs
- Lakkakula, Jaya R, Kurapati, Rajendra, Tynga, Ivan, Krause, Rui W M, Abrahamse, Heidi, Raichur, Ashok M
- Authors: Lakkakula, Jaya R , Kurapati, Rajendra , Tynga, Ivan , Krause, Rui W M , Abrahamse, Heidi , Raichur, Ashok M
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125435 , vital:35783 , https://doi.org/10.1039/C6RA12951J
- Description: Porous CaCO3 microparticles have been used earlier for sustained drug release of hydrophilic drugs but have certain drawbacks for use with hydrophobic drugs. Hence, to overcome these drawbacks, a novel composite of CaCO3 along with cyclodextrin (CD–CaCO3) for the delivery of hydrophobic drugs was developed. Cyclodextrins (CDs), when incorporated within CaCO3, increased the porosity and surface area of microparticles thereby enhancing the encapsulation efficiency of hydrophobic drugs (5-Fluorouracil or Na-L-thyroxine) by forming inclusion complexes with cyclodextrin. Thermogravimetric and FTIR studies confirmed the interaction between the cyclodextrin and CaCO3 microparticles. Raman spectra confirmed the peak of vaterite crystals before and after loading of hydrophobic drugs within the composite. In vitro release studies when performed at pH 4.8 (5-Fu) and pH 1.2 (Na-L-thy) showed release at low pH as CaCO3 is soluble at acidic pH unlike slower release at basic pH. Release kinetics followed a Higuchi kinetic model at pH 4.8 (5-Fu) and pH 1.2 (Na-L-thy) respectively.
- Full Text:
- Date Issued: 2016
- Authors: Lakkakula, Jaya R , Kurapati, Rajendra , Tynga, Ivan , Krause, Rui W M , Abrahamse, Heidi , Raichur, Ashok M
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/125435 , vital:35783 , https://doi.org/10.1039/C6RA12951J
- Description: Porous CaCO3 microparticles have been used earlier for sustained drug release of hydrophilic drugs but have certain drawbacks for use with hydrophobic drugs. Hence, to overcome these drawbacks, a novel composite of CaCO3 along with cyclodextrin (CD–CaCO3) for the delivery of hydrophobic drugs was developed. Cyclodextrins (CDs), when incorporated within CaCO3, increased the porosity and surface area of microparticles thereby enhancing the encapsulation efficiency of hydrophobic drugs (5-Fluorouracil or Na-L-thyroxine) by forming inclusion complexes with cyclodextrin. Thermogravimetric and FTIR studies confirmed the interaction between the cyclodextrin and CaCO3 microparticles. Raman spectra confirmed the peak of vaterite crystals before and after loading of hydrophobic drugs within the composite. In vitro release studies when performed at pH 4.8 (5-Fu) and pH 1.2 (Na-L-thy) showed release at low pH as CaCO3 is soluble at acidic pH unlike slower release at basic pH. Release kinetics followed a Higuchi kinetic model at pH 4.8 (5-Fu) and pH 1.2 (Na-L-thy) respectively.
- Full Text:
- Date Issued: 2016
Cytotoxic activity of marine sponge extracts from the sub-Antarctic Islands and the Southern Ocean
- Olsen, Elisabeth, De Cerf, Christopher, Dziwornu, Godwin A, Puccinelli, Eleonora, Parker-Nance, Shirley, Ansorge, Isabelle J, Samaai, Toufiek, Dingle, Laura M K, Edkins, Adrienne L, Sunassee, Suthananda N
- Authors: Olsen, Elisabeth , De Cerf, Christopher , Dziwornu, Godwin A , Puccinelli, Eleonora , Parker-Nance, Shirley , Ansorge, Isabelle J , Samaai, Toufiek , Dingle, Laura M K , Edkins, Adrienne L , Sunassee, Suthananda N
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/66300 , vital:28931 , https://doi.org/10.17159/sajs.2016/20160202
- Description: publisher version , Over the past 50 years, marine invertebrates, especially sponges, have proven to be a valuable source of new and/or bioactive natural products that have the potential to be further developed as lead compounds for pharmaceutical applications. Although marine benthic invertebrate communities occurring off the coast of South Africa have been explored for their biomedicinal potential, the natural product investigation of marine sponges from the sub-Antarctic Islands in the Southern Ocean for the presence of bioactive secondary metabolites has been relatively unexplored thus far. We report here the results for the biological screening of both aqueous and organic extracts prepared from nine specimens of eight species of marine sponges, collected from around Marion Island and the Prince Edward Islands in the Southern Ocean, for their cytotoxic activity against three cancer cell lines. The results obtained through this multidisciplinary collaborative research effort by exclusively South African institutions has provided an exciting opportunity to discover cytotoxic compounds from sub-Antarctic sponges, whilst contributing to our understanding of the biodiversity and geographic distributions of these cold-water invertebrates. Therefore, we acknowledge here the various contributions of the diverse scientific disciplines that played a pivotal role in providing the necessary platform for the future natural products chemistry investigation of these marine sponges from the sub- Antarctic Islands and the Southern Ocean. Significance: This study will contribute to understanding the biodiversity and geographic distributions of sponges in the Southern Ocean. This multidisciplinary project has enabled the investigation of marine sponges for the presence of cytotoxic compounds. Further investigation will lead to the isolation and identification of cytotoxic compounds present in the active sponge extracts. , University of Cape Town; South African Medical Research Council; National Research Foundation (South Africa); CANSA; Rhodes University; Department of Science and Technology; Department of Environmental Affairs; SANAP
- Full Text:
- Date Issued: 2016
- Authors: Olsen, Elisabeth , De Cerf, Christopher , Dziwornu, Godwin A , Puccinelli, Eleonora , Parker-Nance, Shirley , Ansorge, Isabelle J , Samaai, Toufiek , Dingle, Laura M K , Edkins, Adrienne L , Sunassee, Suthananda N
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/66300 , vital:28931 , https://doi.org/10.17159/sajs.2016/20160202
- Description: publisher version , Over the past 50 years, marine invertebrates, especially sponges, have proven to be a valuable source of new and/or bioactive natural products that have the potential to be further developed as lead compounds for pharmaceutical applications. Although marine benthic invertebrate communities occurring off the coast of South Africa have been explored for their biomedicinal potential, the natural product investigation of marine sponges from the sub-Antarctic Islands in the Southern Ocean for the presence of bioactive secondary metabolites has been relatively unexplored thus far. We report here the results for the biological screening of both aqueous and organic extracts prepared from nine specimens of eight species of marine sponges, collected from around Marion Island and the Prince Edward Islands in the Southern Ocean, for their cytotoxic activity against three cancer cell lines. The results obtained through this multidisciplinary collaborative research effort by exclusively South African institutions has provided an exciting opportunity to discover cytotoxic compounds from sub-Antarctic sponges, whilst contributing to our understanding of the biodiversity and geographic distributions of these cold-water invertebrates. Therefore, we acknowledge here the various contributions of the diverse scientific disciplines that played a pivotal role in providing the necessary platform for the future natural products chemistry investigation of these marine sponges from the sub- Antarctic Islands and the Southern Ocean. Significance: This study will contribute to understanding the biodiversity and geographic distributions of sponges in the Southern Ocean. This multidisciplinary project has enabled the investigation of marine sponges for the presence of cytotoxic compounds. Further investigation will lead to the isolation and identification of cytotoxic compounds present in the active sponge extracts. , University of Cape Town; South African Medical Research Council; National Research Foundation (South Africa); CANSA; Rhodes University; Department of Science and Technology; Department of Environmental Affairs; SANAP
- Full Text:
- Date Issued: 2016
Dating in the dark: a phenomenological study of the lived experience of online relationships
- Authors: Froneman, Carmen Michelle
- Date: 2016
- Subjects: Online dating , Online dating -- Case studies , Internet -- Social aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5462 , vital:20847
- Description: Online relationships are becoming increasingly popular due to the availability, accessibility, and affordability of online social networking and dating sites. Individuals are progressively moving from meeting romantic partners face to face to meeting and engaging with individuals online. There is ample evidence to support the view that individuals do initiate romantic relationships online and often these relationships progress offline. The primary focus of online research had been conducted by communication and linguistic scholars while very little research has been conducted into the psychological conceptualisation of online relationships. In addition, there is a lack of available research pertaining to the development of romantic relationships online and more so in South Africa. The current study utilised Sternberg’s Triangular model of love and the Johari window as a framework for understanding the concepts involved in online romantic relationships. The study specifically aimed to explore and describe the lived experiences of individuals who engage in online dating. The parameters of the study included the elements that comprise the online relationship, the subjective meaning attached to the relationships, and the processes these relationships encompass. The study moreover aimed to explore the progression of the online relationship. The study used a qualitative, phenomenological approach using snowball sampling and semi structured interviews to collect data. Tesch’s model of content analysis was used during data analysis while incorporating the four major processes in phenomenological research, namely (1) epoche, (2) phenomenological reduction, (3) imaginative variation and, (4) synthesis. The findings of the study generated a greater understanding of the complexities of online dating. Themes including online relationship development, the dynamics of online relationships, how love, according to the triangular model of love, is perceived online and, self-disclosure online were identified through the participants narratives. These findings ultimately can be used for future research.
- Full Text:
- Date Issued: 2016
- Authors: Froneman, Carmen Michelle
- Date: 2016
- Subjects: Online dating , Online dating -- Case studies , Internet -- Social aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5462 , vital:20847
- Description: Online relationships are becoming increasingly popular due to the availability, accessibility, and affordability of online social networking and dating sites. Individuals are progressively moving from meeting romantic partners face to face to meeting and engaging with individuals online. There is ample evidence to support the view that individuals do initiate romantic relationships online and often these relationships progress offline. The primary focus of online research had been conducted by communication and linguistic scholars while very little research has been conducted into the psychological conceptualisation of online relationships. In addition, there is a lack of available research pertaining to the development of romantic relationships online and more so in South Africa. The current study utilised Sternberg’s Triangular model of love and the Johari window as a framework for understanding the concepts involved in online romantic relationships. The study specifically aimed to explore and describe the lived experiences of individuals who engage in online dating. The parameters of the study included the elements that comprise the online relationship, the subjective meaning attached to the relationships, and the processes these relationships encompass. The study moreover aimed to explore the progression of the online relationship. The study used a qualitative, phenomenological approach using snowball sampling and semi structured interviews to collect data. Tesch’s model of content analysis was used during data analysis while incorporating the four major processes in phenomenological research, namely (1) epoche, (2) phenomenological reduction, (3) imaginative variation and, (4) synthesis. The findings of the study generated a greater understanding of the complexities of online dating. Themes including online relationship development, the dynamics of online relationships, how love, according to the triangular model of love, is perceived online and, self-disclosure online were identified through the participants narratives. These findings ultimately can be used for future research.
- Full Text:
- Date Issued: 2016
Decolonising education: visual arts, cohesion, transformation
- Authors: Nsele, Zamansele
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146456 , vital:38527 , https://savah.org.za/2016/01/18/call-for-papers-savah-conference-2016/#more-174
- Description: Rethinking Art History and Visual Culture in a Contemporary Context. The Rhodes Must Fall” and “Fees Must Fall” campaigns which arose in South Africa in the course of 2015, while focused on transformative agendas in a broad sense, also emphasised how various inheritances from the West have played a fundamental role in shaping universities – not only in terms of their curricula but also their institutional cultures more generally. Occurring in a context where the humanities are under threat and where neoliberal forces may upset what we understand as fundamental to the academic project, these recent calls for critical engagement with institutional histories and practices suggest that reconsideration of disciplinary knowledges and understandings have become increasingly urgent.
- Full Text:
- Date Issued: 2016
- Authors: Nsele, Zamansele
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/146456 , vital:38527 , https://savah.org.za/2016/01/18/call-for-papers-savah-conference-2016/#more-174
- Description: Rethinking Art History and Visual Culture in a Contemporary Context. The Rhodes Must Fall” and “Fees Must Fall” campaigns which arose in South Africa in the course of 2015, while focused on transformative agendas in a broad sense, also emphasised how various inheritances from the West have played a fundamental role in shaping universities – not only in terms of their curricula but also their institutional cultures more generally. Occurring in a context where the humanities are under threat and where neoliberal forces may upset what we understand as fundamental to the academic project, these recent calls for critical engagement with institutional histories and practices suggest that reconsideration of disciplinary knowledges and understandings have become increasingly urgent.
- Full Text:
- Date Issued: 2016
Depth and habitat determine assemblage structure of South Africa’s warm-temperate reef fish
- Heyns-Veale, Elodie R, Bernard, Anthony T F, Richoux, Nicole B, Parker, Daniel M, Langlois, T J, Harvey, E S, Götz, Albrecht
- Authors: Heyns-Veale, Elodie R , Bernard, Anthony T F , Richoux, Nicole B , Parker, Daniel M , Langlois, T J , Harvey, E S , Götz, Albrecht
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456035 , vital:75477 , xlink:href="https://doi.org/10.1007/s00227-016-2933-8"
- Description: Depth and habitat are important predictors of fish assemblage structure, yet current no-take marine protected area (MPA) networks are generally limited to providing refuge for fish species that inhabit shallow waters and may exclude deep habitats essential to exploited populations. To ensure MPA efficacy at the design, uptake and management levels, baseline data on fish populations associated with deep nearshore reefs are needed. This study employed baited remote underwater stereo-video systems to investigate fish habitat associations at shallow (11–25 m) and deep (45–75 m) reef sites in the Tsitsikamma National Park MPA, South Africa. The compositions of fish assemblages at shallow and deep reef sites were significantly different. Specifically, rare species, juveniles and low trophic level species dominated the shallow reef, while deep reef assemblages were characterised by large, sexually mature and predatory fish. The body size of abundant species was also correlated with depth, with larger individuals being more abundant on deeper reefs. Habitat types were identified according to a habitat classification system established in a previous study, which resulted in four broad depth separated habitat types (defined by macrobenthos and environmental variables). Canonical analysis of principle coordinates (CAP) indicated that habitat type was a good categorical predictor of the observed fish assemblages. The CAP analysis determined that 86 % of the samples were correctly assigned to the habitat type from which they were collected, indicating that specific fish assemblages were associated with distinct habitat types. This study highlights the importance of protecting both shallow and deep reefs, not only to ensure the conservation of particular fish assemblages, but also to provide protection for all stages of the life cycle of fish species.
- Full Text:
- Date Issued: 2016
- Authors: Heyns-Veale, Elodie R , Bernard, Anthony T F , Richoux, Nicole B , Parker, Daniel M , Langlois, T J , Harvey, E S , Götz, Albrecht
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/456035 , vital:75477 , xlink:href="https://doi.org/10.1007/s00227-016-2933-8"
- Description: Depth and habitat are important predictors of fish assemblage structure, yet current no-take marine protected area (MPA) networks are generally limited to providing refuge for fish species that inhabit shallow waters and may exclude deep habitats essential to exploited populations. To ensure MPA efficacy at the design, uptake and management levels, baseline data on fish populations associated with deep nearshore reefs are needed. This study employed baited remote underwater stereo-video systems to investigate fish habitat associations at shallow (11–25 m) and deep (45–75 m) reef sites in the Tsitsikamma National Park MPA, South Africa. The compositions of fish assemblages at shallow and deep reef sites were significantly different. Specifically, rare species, juveniles and low trophic level species dominated the shallow reef, while deep reef assemblages were characterised by large, sexually mature and predatory fish. The body size of abundant species was also correlated with depth, with larger individuals being more abundant on deeper reefs. Habitat types were identified according to a habitat classification system established in a previous study, which resulted in four broad depth separated habitat types (defined by macrobenthos and environmental variables). Canonical analysis of principle coordinates (CAP) indicated that habitat type was a good categorical predictor of the observed fish assemblages. The CAP analysis determined that 86 % of the samples were correctly assigned to the habitat type from which they were collected, indicating that specific fish assemblages were associated with distinct habitat types. This study highlights the importance of protecting both shallow and deep reefs, not only to ensure the conservation of particular fish assemblages, but also to provide protection for all stages of the life cycle of fish species.
- Full Text:
- Date Issued: 2016
Depth-related distribution patterns of subtidal macrobenthos in a well-established marine protected area
- Heyns, E R, Bernard, Anthony T F, Richoux, Nicole B, Götz, A
- Authors: Heyns, E R , Bernard, Anthony T F , Richoux, Nicole B , Götz, A
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/457230 , vital:75618 , xlink:href="https://doi.org/10.1007/s00227-016-2816-z"
- Description: Effective marine resource management requires knowledge of the distribution of critical habitats that support resource populations and the processes that maintain them. Reefs that host diverse macrobenthic communities are important habitats for fish. However, detailed information on macrobenthic communities is rarely available and is usually limited to SCUBA diving depths. To establish depth-related distribution patterns and drivers that structure reef communities, the macrobenthos situated in a warm-temperate marine protected area (MPA; 34°01′24S; 23°54′09E) was sampled between 2009 and 2012. Comparison of shallow (11–25 m) and deep (45–75 m) sites revealed significantly different communities, sharing only 27.9 % of species. LINKTREE analysis revealed a changeover of species along the depth gradient, resulting in four significantly different assemblage clusters, each associated with particular environmental variables. High light intensity supported benthic algae at shallow depths, and as light availability decreased with depth, algal cover diminished and was eventually absent from the deep reef. Upright growth forms and settled particulate matter were positively related to depth and dominated the deep reef. Reduced wave action and currents on the deep reef can explain the increased settling of suspended particles. Under such conditions, clogging of feeding parts of the encrusting species is expected, and upright growth would be favoured. Considering that most MPAs are restricted to shallow coastal habitats and that macrobenthic communities change significantly with depth, it is probable that many unique deep reef habitats are currently afforded no protection.
- Full Text:
- Date Issued: 2016
- Authors: Heyns, E R , Bernard, Anthony T F , Richoux, Nicole B , Götz, A
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/457230 , vital:75618 , xlink:href="https://doi.org/10.1007/s00227-016-2816-z"
- Description: Effective marine resource management requires knowledge of the distribution of critical habitats that support resource populations and the processes that maintain them. Reefs that host diverse macrobenthic communities are important habitats for fish. However, detailed information on macrobenthic communities is rarely available and is usually limited to SCUBA diving depths. To establish depth-related distribution patterns and drivers that structure reef communities, the macrobenthos situated in a warm-temperate marine protected area (MPA; 34°01′24S; 23°54′09E) was sampled between 2009 and 2012. Comparison of shallow (11–25 m) and deep (45–75 m) sites revealed significantly different communities, sharing only 27.9 % of species. LINKTREE analysis revealed a changeover of species along the depth gradient, resulting in four significantly different assemblage clusters, each associated with particular environmental variables. High light intensity supported benthic algae at shallow depths, and as light availability decreased with depth, algal cover diminished and was eventually absent from the deep reef. Upright growth forms and settled particulate matter were positively related to depth and dominated the deep reef. Reduced wave action and currents on the deep reef can explain the increased settling of suspended particles. Under such conditions, clogging of feeding parts of the encrusting species is expected, and upright growth would be favoured. Considering that most MPAs are restricted to shallow coastal habitats and that macrobenthic communities change significantly with depth, it is probable that many unique deep reef habitats are currently afforded no protection.
- Full Text:
- Date Issued: 2016
Design and implementation of a multi-agent opportunistic grid computing platform
- Authors: Muranganwa, Raymond
- Date: 2016
- Subjects: Computational grids (Computer systems)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2722 , vital:28064
- Description: Opportunistic Grid Computing involves joining idle computing resources in enterprises into a converged high performance commodity infrastructure. The research described in this dissertation investigates the viability of public resource computing in offering a plethora of possibilities through seamless access to shared compute and storage resources. The research proposes and conceptualizes the Multi-Agent Opportunistic Grid (MAOG) solution in an Information and Communication Technologies for Development (ICT4D) initiative to address some limitations prevalent in traditional distributed system implementations. Proof-of-concept software components based on JADE (Java Agent Development Framework) validated Multi-Agent Systems (MAS) as an important tool for provisioning of Opportunistic Grid Computing platforms. Exploration of agent technologies within the research context identified two key components which improve access to extended computer capabilities. The first component is a Mobile Agent (MA) compute component in which a group of agents interact to pool shared processor cycles. The compute component integrates dynamic resource identification and allocation strategies by incorporating the Contract Net Protocol (CNP) and rule based reasoning concepts. The second service is a MAS based storage component realized through disk mirroring and Google file-system’s chunking with atomic append storage techniques. This research provides a candidate Opportunistic Grid Computing platform design and implementation through the use of MAS. Experiments conducted validated the design and implementation of the compute and storage services. From results, support for processing user applications; resource identification and allocation; and rule based reasoning validated the MA compute component. A MAS based file-system that implements chunking optimizations was considered to be optimum based on evaluations. The findings from the undertaken experiments also validated the functional adequacy of the implementation, and show the suitability of MAS for provisioning of robust, autonomous, and intelligent platforms. The context of this research, ICT4D, provides a solution to optimizing and increasing the utilization of computing resources that are usually idle in these contexts.
- Full Text:
- Date Issued: 2016
- Authors: Muranganwa, Raymond
- Date: 2016
- Subjects: Computational grids (Computer systems)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2722 , vital:28064
- Description: Opportunistic Grid Computing involves joining idle computing resources in enterprises into a converged high performance commodity infrastructure. The research described in this dissertation investigates the viability of public resource computing in offering a plethora of possibilities through seamless access to shared compute and storage resources. The research proposes and conceptualizes the Multi-Agent Opportunistic Grid (MAOG) solution in an Information and Communication Technologies for Development (ICT4D) initiative to address some limitations prevalent in traditional distributed system implementations. Proof-of-concept software components based on JADE (Java Agent Development Framework) validated Multi-Agent Systems (MAS) as an important tool for provisioning of Opportunistic Grid Computing platforms. Exploration of agent technologies within the research context identified two key components which improve access to extended computer capabilities. The first component is a Mobile Agent (MA) compute component in which a group of agents interact to pool shared processor cycles. The compute component integrates dynamic resource identification and allocation strategies by incorporating the Contract Net Protocol (CNP) and rule based reasoning concepts. The second service is a MAS based storage component realized through disk mirroring and Google file-system’s chunking with atomic append storage techniques. This research provides a candidate Opportunistic Grid Computing platform design and implementation through the use of MAS. Experiments conducted validated the design and implementation of the compute and storage services. From results, support for processing user applications; resource identification and allocation; and rule based reasoning validated the MA compute component. A MAS based file-system that implements chunking optimizations was considered to be optimum based on evaluations. The findings from the undertaken experiments also validated the functional adequacy of the implementation, and show the suitability of MAS for provisioning of robust, autonomous, and intelligent platforms. The context of this research, ICT4D, provides a solution to optimizing and increasing the utilization of computing resources that are usually idle in these contexts.
- Full Text:
- Date Issued: 2016
Design of a Configurable Embedded Network Tap Flow Generation using NetFlow v9 and IPFIX Formats
- Pennefather, Sean, Irwin, Barry V W
- Authors: Pennefather, Sean , Irwin, Barry V W
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427756 , vital:72460 , https://www.researchgate.net/profile/Barry-Ir-win/publication/327622779_Design_of_a_Configurable_Embedded_Network_Tap_Flow_Generation_using_NetFlow_v9_and_IPFIX_Formats/links/5b9a19f2299bf14ad4d6a591/Design-of-a-Configurable-Embedded-Network-Tap-Flow-Generation-using-NetFlow-v9-and-IPFIX-Formats.pdf
- Description: This paper describes the design of a $200 hardware apparatus capable of passively monitoring network transmission at wire speeds of 100Mbit/s and generating NetFlow v9 or IPFIX compliant network flows for a downstream monitoring infrastructure. Testing of the apparatus hardware confirmed no network disruptions regardless of operational or power state while still being capable of correctly monitoring network traffic when configured. System testing under situations of heavy load confirmed apparatus capability at monitoring network traffic and correct generation of network flows compliant with either NetFlow v9 or IPFIX standards.
- Full Text:
- Date Issued: 2016
- Authors: Pennefather, Sean , Irwin, Barry V W
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/427756 , vital:72460 , https://www.researchgate.net/profile/Barry-Ir-win/publication/327622779_Design_of_a_Configurable_Embedded_Network_Tap_Flow_Generation_using_NetFlow_v9_and_IPFIX_Formats/links/5b9a19f2299bf14ad4d6a591/Design-of-a-Configurable-Embedded-Network-Tap-Flow-Generation-using-NetFlow-v9-and-IPFIX-Formats.pdf
- Description: This paper describes the design of a $200 hardware apparatus capable of passively monitoring network transmission at wire speeds of 100Mbit/s and generating NetFlow v9 or IPFIX compliant network flows for a downstream monitoring infrastructure. Testing of the apparatus hardware confirmed no network disruptions regardless of operational or power state while still being capable of correctly monitoring network traffic when configured. System testing under situations of heavy load confirmed apparatus capability at monitoring network traffic and correct generation of network flows compliant with either NetFlow v9 or IPFIX standards.
- Full Text:
- Date Issued: 2016
Designing a proxemic natural user interface to support information sharing among co-located mobile devices
- Authors: Lee Son, Timothy
- Date: 2016
- Subjects: User interfaces (Computer systems) Mobile computing
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/12845 , vital:27126
- Description: Existing information sharing methods used by mobile devices require the user to repeat a series of steps to share one or more selected files with another individual, where the entire process is repeated for sharing the same file(s) with multiple individuals. Due to constant advancements in mobile computing, mobile devices are able to provide new, more intuitive, and easier solutions to sharing information. Natural User Interfaces (NUIs) primarily focus on the reuse of existing knowledge (from other applications or activities) or human abilities (such as touch, speech, and gestures) to provide a more accurate and usable solution to existing human computer interaction (HCI) systems. The interaction techniques of NUIs have transformed these human abilities. The main research objective was to design a proxemic NUI to provide an accurate and usable solution to support information sharing among co-located mobile devices. The development of MotionShare supported multiple devices to share information simultaneously using NUI interaction techniques. An initial calibration setup allowed MotionShare to calculate the approximate positions and orientations of every device in the environment. Novel NUI interaction techniques were implemented because of the known positions of these devices. MotionShare was evaluated using two evaluation techniques, namely analytical and experimental. The results showed device positioning to have a mean precision, trueness, and recall of 72.21%, 91.39%, and 71.63% respectively. The results showed MotionShare gestures to have a recall of 90.50% and 100.00% for the point gesture and the touch gesture respectively. The experimental technique consisted of a pilot study (formative evaluation) and a usability evaluation (summative evaluation). The results of the usability evaluation showed high user satisfaction and statistical analysis, which revealed MotionShare to achieve the main research objective. These results also showed that participants preferred the touch gesture to the point gesture, but expressed both gestures can be utilised for the tasks of MotionShare.
- Full Text:
- Date Issued: 2016
- Authors: Lee Son, Timothy
- Date: 2016
- Subjects: User interfaces (Computer systems) Mobile computing
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10948/12845 , vital:27126
- Description: Existing information sharing methods used by mobile devices require the user to repeat a series of steps to share one or more selected files with another individual, where the entire process is repeated for sharing the same file(s) with multiple individuals. Due to constant advancements in mobile computing, mobile devices are able to provide new, more intuitive, and easier solutions to sharing information. Natural User Interfaces (NUIs) primarily focus on the reuse of existing knowledge (from other applications or activities) or human abilities (such as touch, speech, and gestures) to provide a more accurate and usable solution to existing human computer interaction (HCI) systems. The interaction techniques of NUIs have transformed these human abilities. The main research objective was to design a proxemic NUI to provide an accurate and usable solution to support information sharing among co-located mobile devices. The development of MotionShare supported multiple devices to share information simultaneously using NUI interaction techniques. An initial calibration setup allowed MotionShare to calculate the approximate positions and orientations of every device in the environment. Novel NUI interaction techniques were implemented because of the known positions of these devices. MotionShare was evaluated using two evaluation techniques, namely analytical and experimental. The results showed device positioning to have a mean precision, trueness, and recall of 72.21%, 91.39%, and 71.63% respectively. The results showed MotionShare gestures to have a recall of 90.50% and 100.00% for the point gesture and the touch gesture respectively. The experimental technique consisted of a pilot study (formative evaluation) and a usability evaluation (summative evaluation). The results of the usability evaluation showed high user satisfaction and statistical analysis, which revealed MotionShare to achieve the main research objective. These results also showed that participants preferred the touch gesture to the point gesture, but expressed both gestures can be utilised for the tasks of MotionShare.
- Full Text:
- Date Issued: 2016
Detecting derivative malware samples using deobfuscation-assisted similarity analysis
- Authors: Wrench, Peter Mark
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/383 , vital:19954
- Description: The overwhelming popularity of PHP as a hosting platform has made it the language of choice for developers of Remote Access Trojans (RATs or web shells) and other malicious software. These shells are typically used to compromise and monetise web platforms by providing the attacker with basic remote access to the system, including _le transfer, command execution, network reconnaissance, and database connectivity. Once infected, compromised systems can be used to defraud users by hosting phishing sites, performing Distributed Denial of Service attacks, or serving as anonymous platforms for sending spam or other malfeasance. The vast majority of these threats are largely derivative, incorporating core capabilities found in more established RATs such as c99 and r57. Authors of malicious software routinely produce new shell variants by modifying the behaviours of these ubiquitous RATs, either to add desired functionality or to avoid detection by signature-based detection systems. Once these modified shells are eventually identified (or additional functionality is required), the process of shell adaptation begins again. The end result of this iterative process is a web of separate but related shell variants, many of which are at least partially derived from one of the more popular and influential RATs. In response to the problem outlined above, the author set out to design and implement a system capable of circumventing common obfuscation techniques and identifying derivative malware samples in a given collection. To begin with, a decoder component was developed to syntactically deobfuscate and normalise PHP code by detecting and reversing idiomatic obfuscation constructs, and to apply uniform formatting conventions to all system inputs. A unified malware analysis framework, called Viper, was then extended to create a modular similarity analysis system comprised of individual feature extraction modules, modules responsible for batch processing, a matrix module for comparing sample features, and two visualisation modules capable of generating visual representations of shell similarity. The principal conclusion of the research was that the deobfuscation performed by the decoder component prior to analysis dramatically improved the observed levels of similarity between test samples. This in turn allowed the modular similarity analysis system to identify derivative clusters (or families) within a large collection of shells more accurately. Techniques for isolating and re-rendering these clusters were also developed and demonstrated to be effective at increasing the amount of detail available for evaluating the relative magnitudes of the relationships within each cluster.
- Full Text:
- Date Issued: 2016
- Authors: Wrench, Peter Mark
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/383 , vital:19954
- Description: The overwhelming popularity of PHP as a hosting platform has made it the language of choice for developers of Remote Access Trojans (RATs or web shells) and other malicious software. These shells are typically used to compromise and monetise web platforms by providing the attacker with basic remote access to the system, including _le transfer, command execution, network reconnaissance, and database connectivity. Once infected, compromised systems can be used to defraud users by hosting phishing sites, performing Distributed Denial of Service attacks, or serving as anonymous platforms for sending spam or other malfeasance. The vast majority of these threats are largely derivative, incorporating core capabilities found in more established RATs such as c99 and r57. Authors of malicious software routinely produce new shell variants by modifying the behaviours of these ubiquitous RATs, either to add desired functionality or to avoid detection by signature-based detection systems. Once these modified shells are eventually identified (or additional functionality is required), the process of shell adaptation begins again. The end result of this iterative process is a web of separate but related shell variants, many of which are at least partially derived from one of the more popular and influential RATs. In response to the problem outlined above, the author set out to design and implement a system capable of circumventing common obfuscation techniques and identifying derivative malware samples in a given collection. To begin with, a decoder component was developed to syntactically deobfuscate and normalise PHP code by detecting and reversing idiomatic obfuscation constructs, and to apply uniform formatting conventions to all system inputs. A unified malware analysis framework, called Viper, was then extended to create a modular similarity analysis system comprised of individual feature extraction modules, modules responsible for batch processing, a matrix module for comparing sample features, and two visualisation modules capable of generating visual representations of shell similarity. The principal conclusion of the research was that the deobfuscation performed by the decoder component prior to analysis dramatically improved the observed levels of similarity between test samples. This in turn allowed the modular similarity analysis system to identify derivative clusters (or families) within a large collection of shells more accurately. Techniques for isolating and re-rendering these clusters were also developed and demonstrated to be effective at increasing the amount of detail available for evaluating the relative magnitudes of the relationships within each cluster.
- Full Text:
- Date Issued: 2016
Detecting derivative malware samples using deobfuscation-assisted similarity analysis
- Wrench, Peter, Irwin, Barry V W
- Authors: Wrench, Peter , Irwin, Barry V W
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429494 , vital:72617 , 10.23919/SAIEE.2016.8531543
- Description: The abundance of PHP-based Remote Access Trojans (or web shells) found in the wild has led malware researchers to develop systems capable of tracking and analysing these shells. In the past, such shells were ably classified using signature matching, a process that is currently unable to cope with the sheer volume and variety of web-based malware in circulation. Although a large percentage of newly-created webshell software incorporates portions of code derived from seminal shells such as c99 and r57, they are able to disguise this by making extensive use of obfuscation techniques intended to frustrate any attempts to dissect or reverse engineer the code. This paper presents an approach to shell classification and analysis (based on similarity to a body of known malware) in an attempt to create a comprehensive taxonomy of PHP-based web shells. Several different measures of similarity were used in conjunction with clustering algorithms and visualisation techniques in order to achieve this. Furthermore, an auxiliary component capable of syntactically deobfuscating PHP code is described. This was employed to reverse idiomatic obfuscation constructs used by software authors. It was found that this deobfuscation dramatically increased the observed levels of similarity by exposing additional code for analysis.
- Full Text:
- Date Issued: 2016
- Authors: Wrench, Peter , Irwin, Barry V W
- Date: 2016
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/429494 , vital:72617 , 10.23919/SAIEE.2016.8531543
- Description: The abundance of PHP-based Remote Access Trojans (or web shells) found in the wild has led malware researchers to develop systems capable of tracking and analysing these shells. In the past, such shells were ably classified using signature matching, a process that is currently unable to cope with the sheer volume and variety of web-based malware in circulation. Although a large percentage of newly-created webshell software incorporates portions of code derived from seminal shells such as c99 and r57, they are able to disguise this by making extensive use of obfuscation techniques intended to frustrate any attempts to dissect or reverse engineer the code. This paper presents an approach to shell classification and analysis (based on similarity to a body of known malware) in an attempt to create a comprehensive taxonomy of PHP-based web shells. Several different measures of similarity were used in conjunction with clustering algorithms and visualisation techniques in order to achieve this. Furthermore, an auxiliary component capable of syntactically deobfuscating PHP code is described. This was employed to reverse idiomatic obfuscation constructs used by software authors. It was found that this deobfuscation dramatically increased the observed levels of similarity by exposing additional code for analysis.
- Full Text:
- Date Issued: 2016
Detection of plant growth enhancing features in psychrotolerant yeasts from Patagonia (Argentina)
- Mestre, María C, Fontenla, Sonia, Bruzone, Marie C, Fernández, Natalia V, Dames, Joanna F
- Authors: Mestre, María C , Fontenla, Sonia , Bruzone, Marie C , Fernández, Natalia V , Dames, Joanna F
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448581 , vital:74744 , https://doi.org/10.1002/jobm.201500728
- Description: This study explores the biotechnological potential for plant production of twelve psychrotolerant yeasts strains from Northwest‐Patagonia. These strains were isolated from different substrates associated with Nothofagus sp. in native forests and Vaccinium sp. in a commercial plantation. Yeasts characterization was performed using in vitro assays to evaluate the production of auxin‐like compounds and siderophores, ability to solubilize inorganic phosphate and to reduce common plant pathogen growth. Strain YF8.3 identified as Aureobasidium pullullans was the main producer of auxin‐like and siderophores compounds. Phosphate solubilization was a characteristic observed by strains L8.12 and CRUB1775 identified as Holtermaniella takashimae and Candida maritima, respectively. Different yeast strains were able to inhibit the growth of Verticillium dahliae PPRI5569 and Pythium aphanidermatum PPRI 9009, but they all failed to inhibit the growth of Fusarium oxysporum PPRI5457. The present study, suggests that yeasts present in different environments in Northwestern‐Patagonian have physiological in vitro features which may influence plant growth. These results are promising for the developing of biological products based on Patagonian yeasts for plant production in cold‐temperate regions.
- Full Text:
- Date Issued: 2016
- Authors: Mestre, María C , Fontenla, Sonia , Bruzone, Marie C , Fernández, Natalia V , Dames, Joanna F
- Date: 2016
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/448581 , vital:74744 , https://doi.org/10.1002/jobm.201500728
- Description: This study explores the biotechnological potential for plant production of twelve psychrotolerant yeasts strains from Northwest‐Patagonia. These strains were isolated from different substrates associated with Nothofagus sp. in native forests and Vaccinium sp. in a commercial plantation. Yeasts characterization was performed using in vitro assays to evaluate the production of auxin‐like compounds and siderophores, ability to solubilize inorganic phosphate and to reduce common plant pathogen growth. Strain YF8.3 identified as Aureobasidium pullullans was the main producer of auxin‐like and siderophores compounds. Phosphate solubilization was a characteristic observed by strains L8.12 and CRUB1775 identified as Holtermaniella takashimae and Candida maritima, respectively. Different yeast strains were able to inhibit the growth of Verticillium dahliae PPRI5569 and Pythium aphanidermatum PPRI 9009, but they all failed to inhibit the growth of Fusarium oxysporum PPRI5457. The present study, suggests that yeasts present in different environments in Northwestern‐Patagonian have physiological in vitro features which may influence plant growth. These results are promising for the developing of biological products based on Patagonian yeasts for plant production in cold‐temperate regions.
- Full Text:
- Date Issued: 2016
Determinants of economic growth in China: 1978-2013
- Authors: Sipuka, Msingathi
- Date: 2016
- Subjects: China -- Economic conditions -- 1976-2000 , Economic development -- China
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/11181 , vital:26892
- Description: On 1 October 1949, the Communist Party of China under the leadership of Mao Zedong proclaimed the establishment of the People’s Republic of China. Mao was to lead the People’s Republic of China for the next twenty seven years until his death in 1976. During this twenty seven year period under Mao’s leadership the Communist Party of China consolidated its position as the leader of Chinese society and in so doing consolidated communist ideology as the central perspective that guided social and economic planning in China. In 1978, two years after Mao’s death, Deng Xiaping assumed the leadership of the Communist Party of China and this period marked the beginning of far reaching economic and social reforms in China. Over the next thirty years these reforms were to transform China’s economy from the tenth largest to the second largest in the world by the end of 2013. During this period China grew its manufacturing base to the extent that the country has become the world’s largest manufacturer and the world’s leading exporter. This transformation of China’s economy has translated to the country experiencing a period of high levels of economic growth over a sustained period of over 30 years. Estimates suggest that the country’s gross domestic product grew at an average annual rate of nearly 10% over a thirty year period from 1978. These high levels of economic growth have significantly contributed to the overall reduction of poverty levels in the country, with some estimates suggesting that between 300 million to 500 million of the country’s citizens have been lifted out of poverty over a period of thirty years. China’s economic growth has had an impact beyond its own borders, as growth in many developing countries has been inextricably linked to developments in the Chinese economy in particular its demand for raw materials.For developing countries that continue to grapple with high levels of poverty among its citizens, China’s experience of lifting such large numbers of its own citizens out of poverty at the back of high levels of economic growth over a period of thirty years must serve as a basis for some learnings. The primary purpose of this research is aimed at contributing towards building the basis for such learnings, particularly with regards to building an understanding of how China has been able to grow its economy at such high levels over a sustained period of time. This research aims to identify the determinants of China’s growth post 1978. The determinants of growth are studied particularly from 1978 because the year marks the beginning of the period of economic reforms.
- Full Text:
- Date Issued: 2016
- Authors: Sipuka, Msingathi
- Date: 2016
- Subjects: China -- Economic conditions -- 1976-2000 , Economic development -- China
- Language: English
- Type: Thesis , Masters , MPhil
- Identifier: http://hdl.handle.net/10948/11181 , vital:26892
- Description: On 1 October 1949, the Communist Party of China under the leadership of Mao Zedong proclaimed the establishment of the People’s Republic of China. Mao was to lead the People’s Republic of China for the next twenty seven years until his death in 1976. During this twenty seven year period under Mao’s leadership the Communist Party of China consolidated its position as the leader of Chinese society and in so doing consolidated communist ideology as the central perspective that guided social and economic planning in China. In 1978, two years after Mao’s death, Deng Xiaping assumed the leadership of the Communist Party of China and this period marked the beginning of far reaching economic and social reforms in China. Over the next thirty years these reforms were to transform China’s economy from the tenth largest to the second largest in the world by the end of 2013. During this period China grew its manufacturing base to the extent that the country has become the world’s largest manufacturer and the world’s leading exporter. This transformation of China’s economy has translated to the country experiencing a period of high levels of economic growth over a sustained period of over 30 years. Estimates suggest that the country’s gross domestic product grew at an average annual rate of nearly 10% over a thirty year period from 1978. These high levels of economic growth have significantly contributed to the overall reduction of poverty levels in the country, with some estimates suggesting that between 300 million to 500 million of the country’s citizens have been lifted out of poverty over a period of thirty years. China’s economic growth has had an impact beyond its own borders, as growth in many developing countries has been inextricably linked to developments in the Chinese economy in particular its demand for raw materials.For developing countries that continue to grapple with high levels of poverty among its citizens, China’s experience of lifting such large numbers of its own citizens out of poverty at the back of high levels of economic growth over a period of thirty years must serve as a basis for some learnings. The primary purpose of this research is aimed at contributing towards building the basis for such learnings, particularly with regards to building an understanding of how China has been able to grow its economy at such high levels over a sustained period of time. This research aims to identify the determinants of China’s growth post 1978. The determinants of growth are studied particularly from 1978 because the year marks the beginning of the period of economic reforms.
- Full Text:
- Date Issued: 2016
Determinants of economic growth in South Africa: an economic analysis of the Keynesian macroeconomic model
- Authors: Nach, Marida Nephertiti
- Date: 2016
- Subjects: South Africa -- Economic conditions Economic development -- South Africa Finance -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/12459 , vital:27068
- Description: A country’s performance is commonly measured by its Gross Domestic Product (GDP). The Gross Domestic Product in Developing Countries (DCs) can be seen confusing and unbalanced, with regular and unconditional falls and booms. This study aims at examining the factors that affect the Gross Domestic Product (GDP) of Developing Countries (DCs) whereby South Africa is being selected as a representative. An econometric analysis of the Keynesian model is adopted to test the South African Gross Domestic Product (GDP) over a decade (10 years). The methodology conducted uses quarterly time series data from the South African Reserve Bank (SARB) where the South African Gross Domestic Product (GDP) is modelled as a function of consumption expenditure, domestic investment, government spending and export/import of the country. This is in order to determine which of these factors best explain South African economic growth dynamics. The variables in the model are tested for stationary and the result shows that the variables become stationary at 1st difference, except for consumption which become stationary at 2nd difference. The Ordinary Least Squares (OLS) results confirm that consumption, investment, government spending and net export all have a positive impact on Gross Domestic Product (GDP). The findings suggest that the South African Gross Domestic Product is mainly influenced by consumption, followed by investment. In the recommendation context, the study recommends that South Africa should continue to maintain price stability while at the same time endeavour to attract more investment to the country. Moreover, Developing Countries need to maintain a fiscal discipline without necessarily losing sight of the international dynamics. For further areas of studies, the study recommends more analysis on macroeconomic policies that are comprehensive and can cover all aspects related to the Keynesian model of economic growth. Finally, it is necessary to remind that the findings and recommendations drawn from the study are limited to the concept of South Africa and are based only on the results from the empirical analysis conducted.
- Full Text:
- Date Issued: 2016
- Authors: Nach, Marida Nephertiti
- Date: 2016
- Subjects: South Africa -- Economic conditions Economic development -- South Africa Finance -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/12459 , vital:27068
- Description: A country’s performance is commonly measured by its Gross Domestic Product (GDP). The Gross Domestic Product in Developing Countries (DCs) can be seen confusing and unbalanced, with regular and unconditional falls and booms. This study aims at examining the factors that affect the Gross Domestic Product (GDP) of Developing Countries (DCs) whereby South Africa is being selected as a representative. An econometric analysis of the Keynesian model is adopted to test the South African Gross Domestic Product (GDP) over a decade (10 years). The methodology conducted uses quarterly time series data from the South African Reserve Bank (SARB) where the South African Gross Domestic Product (GDP) is modelled as a function of consumption expenditure, domestic investment, government spending and export/import of the country. This is in order to determine which of these factors best explain South African economic growth dynamics. The variables in the model are tested for stationary and the result shows that the variables become stationary at 1st difference, except for consumption which become stationary at 2nd difference. The Ordinary Least Squares (OLS) results confirm that consumption, investment, government spending and net export all have a positive impact on Gross Domestic Product (GDP). The findings suggest that the South African Gross Domestic Product is mainly influenced by consumption, followed by investment. In the recommendation context, the study recommends that South Africa should continue to maintain price stability while at the same time endeavour to attract more investment to the country. Moreover, Developing Countries need to maintain a fiscal discipline without necessarily losing sight of the international dynamics. For further areas of studies, the study recommends more analysis on macroeconomic policies that are comprehensive and can cover all aspects related to the Keynesian model of economic growth. Finally, it is necessary to remind that the findings and recommendations drawn from the study are limited to the concept of South Africa and are based only on the results from the empirical analysis conducted.
- Full Text:
- Date Issued: 2016