Social media tools influencing customer purchasing behaviour in the retail environment
- Authors: Scholtz, Reynardt
- Date: 2014
- Subjects: Internet marketing , Social media -- Marketing , Branding (Marketing)
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9330 , http://hdl.handle.net/10948/d1021055
- Description: Given the importance of a business being able to create a positive brand image in the minds of customers and influencing customer purchasing behaviour, there is a lack of attention given to the research of the role that social media tools can play in the success of retailers. Numerous research studies have focussed on determining the advantages of and impact that social media tools can have on the success of businesses, however, the impact of social media tools on the creation of a positive brand image, and influencing customer purchasing behaviour is less evident. Thus, the primary objective of this study is to investigate the influence of social media tools on the brand image of retailers and how it affects customer purchasing behaviour. A full literature review was conducted on the retail environment and its importance, as well as on social media as a marketing communication tool. Thereafter, independent variables (Official websites, Facebook and Twitter) were identified as possibly influencing the intervening variable (Brand image) and dependent variable (Customer purchasing behaviour). Three independent variables were selected and used to construct a hypothetical model and research hypothesis. The purpose of these independent variables was to determine whether the use of social media tools could lead to a positive brand image and ultimately improve customer purchasing behaviour. An empirical investigation was undertaken to be able to establish the influence of social media tools on the brand image and customer purchasing behaviour of retail customers. The measuring instrument used for this study, a questionnaire, was constructed from secondary literature sources. The convenience sampling technique was used to identify respondents. The usable questionnaires that were gathered from respondents were examined through statistical analyses. Exploratory factor analysis (EFA) and the calculation of Cronbach’s alpha coefficients were used to confirm the validity and reliability of the measuring instrument. Descriptive statistics, as part of the data analyses, were calculated to summarise and allow interpretation of the sample data. Furthermore, Pearson’s Product Moment Correlations were calculated to determine correlations among variables used in this study. Multiple regression analysis was the primary statistical procedure used for testing the significance of relationships hypothesised between the independent, intervening and dependent variables of this study. The empirical investigation was concluded by a the calculation of a t-test and Analysis of Variance (ANOVA), for the purpose of determining the influence of selected demographic variables on respondents’ perceptions with regard to the independent, intervening and dependent variables. In addition, post-hoc Tukey tests were conducted to determine significant differences among individual mean scores, and the degree of practical significance was determined by calculated Cohen’s d values. Based on the results of the empirical investigation, significant relationships were found among the independent variables (Official websites, Facebook and Twitter), the intervening variable (Brand image) and the dependent variable (Customer purchasing behaviour). The empirical investigation revealed that the age of respondents has a significant impact on how their image of a brand and purchasing behaviour are influenced by retailers’ use of social media tools. This study has made a contribution to the shortage of literature on the impact of social media tools on retailers. The hypothetical model developed for this study assisted in understanding the impact that retailers’ use of social media tools have on the brand image of retailers and customers’ purchasing behaviour. As a result, this study provides recommendations and suggestions for retailers to ensure a positive brand image in the minds of customers, and to ultimately use social media tools to positively influence the purchasing behaviour of customers.
- Full Text:
- Date Issued: 2014
- Authors: Scholtz, Reynardt
- Date: 2014
- Subjects: Internet marketing , Social media -- Marketing , Branding (Marketing)
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9330 , http://hdl.handle.net/10948/d1021055
- Description: Given the importance of a business being able to create a positive brand image in the minds of customers and influencing customer purchasing behaviour, there is a lack of attention given to the research of the role that social media tools can play in the success of retailers. Numerous research studies have focussed on determining the advantages of and impact that social media tools can have on the success of businesses, however, the impact of social media tools on the creation of a positive brand image, and influencing customer purchasing behaviour is less evident. Thus, the primary objective of this study is to investigate the influence of social media tools on the brand image of retailers and how it affects customer purchasing behaviour. A full literature review was conducted on the retail environment and its importance, as well as on social media as a marketing communication tool. Thereafter, independent variables (Official websites, Facebook and Twitter) were identified as possibly influencing the intervening variable (Brand image) and dependent variable (Customer purchasing behaviour). Three independent variables were selected and used to construct a hypothetical model and research hypothesis. The purpose of these independent variables was to determine whether the use of social media tools could lead to a positive brand image and ultimately improve customer purchasing behaviour. An empirical investigation was undertaken to be able to establish the influence of social media tools on the brand image and customer purchasing behaviour of retail customers. The measuring instrument used for this study, a questionnaire, was constructed from secondary literature sources. The convenience sampling technique was used to identify respondents. The usable questionnaires that were gathered from respondents were examined through statistical analyses. Exploratory factor analysis (EFA) and the calculation of Cronbach’s alpha coefficients were used to confirm the validity and reliability of the measuring instrument. Descriptive statistics, as part of the data analyses, were calculated to summarise and allow interpretation of the sample data. Furthermore, Pearson’s Product Moment Correlations were calculated to determine correlations among variables used in this study. Multiple regression analysis was the primary statistical procedure used for testing the significance of relationships hypothesised between the independent, intervening and dependent variables of this study. The empirical investigation was concluded by a the calculation of a t-test and Analysis of Variance (ANOVA), for the purpose of determining the influence of selected demographic variables on respondents’ perceptions with regard to the independent, intervening and dependent variables. In addition, post-hoc Tukey tests were conducted to determine significant differences among individual mean scores, and the degree of practical significance was determined by calculated Cohen’s d values. Based on the results of the empirical investigation, significant relationships were found among the independent variables (Official websites, Facebook and Twitter), the intervening variable (Brand image) and the dependent variable (Customer purchasing behaviour). The empirical investigation revealed that the age of respondents has a significant impact on how their image of a brand and purchasing behaviour are influenced by retailers’ use of social media tools. This study has made a contribution to the shortage of literature on the impact of social media tools on retailers. The hypothetical model developed for this study assisted in understanding the impact that retailers’ use of social media tools have on the brand image of retailers and customers’ purchasing behaviour. As a result, this study provides recommendations and suggestions for retailers to ensure a positive brand image in the minds of customers, and to ultimately use social media tools to positively influence the purchasing behaviour of customers.
- Full Text:
- Date Issued: 2014
Socio-economic contribution of community food gardens to the livelihoods of rural households in Lepelle-Nkumpi local municipality of Limpopo province, South Africa
- Authors: Malahlela, Nkele Dorcus
- Date: 2014
- Subjects: Community development -- South Africa -- Limpopo , Rural development -- South Africa -- Limpopo , Food security -- South Africa -- Limpopo , Food crops -- South Africa -- Limpopo
- Language: English
- Type: Thesis , Masters , MSc Agric (Agricultural Economics)
- Identifier: vital:11238 , http://hdl.handle.net/10353/d1021330 , Community development -- South Africa -- Limpopo , Rural development -- South Africa -- Limpopo , Food security -- South Africa -- Limpopo , Food crops -- South Africa -- Limpopo
- Description: Community food gardens are regarded as a means through which rural households can improve their livelihoods. This study explores the contribution of community food gardens (CFG) to livelihoods in the Lepelle-Nkumpi local municipality in the Limpopo province. The objectives of this study are, firstly to explore the reason behind CFG participation and the reasons behind the participating possibility. Secondly, the study seeks to identify the socio-economic factors influencing the participation of households in CFG and lastly to determine the influence of CFG and other socio-economic variables on household food security status (HFSS). Descriptive statistical analysis was used to describe the socio-economic characteristics and the reasons behind CFG participation and the reasons behind the participating possibility. The binary logistic regression model was used to analyse the determinants of household participation in community food gardens as well as the contribution of CFG to HFSS on Statistical Package for Social Science (SPSS) software version 21. Through a structured questionnaire, data was collected from a sample of 180 households which was obtained using multistage sampling. Descriptive results on the characteristics of sampled households revealed that there are high levels of food security in the area with 70% being food secure of which around 42.2% are CFG participants and 30% are food insecure. Furthermore the descriptive statistical analysis indicated that participation of households in CFG is mainly to obtain a source of food among the CFG participants and to generate income amongst the non-participants. On the basis of descriptive analysis, this study concludes that source of food and income generation respectively are the main reasons behind CFG participation and the possibilities of becoming a participant. Therefore the study accepts the research hypothesis stating that “There are social and economic reasons behind household participation and the possibilities of participating in CFG”. Binary results for the determinants of CFG participation revealed that socio-economic variables such as household size, farm income, household monthly income, land size, household perception, marital status, agricultural training and homestead gardening significantly influence household decisions to participate in CFG. This is an implication that socio-economic variables tested in this study are significantly influential to the household decision to participate in CFG, leading to the acceptance of the first hypothesis which states that “Socioeconomic factors determine the community food garden ownership or participation”. The results of the contribution made by CFG to HFSS showed that socioeconomic variables such as gender, age, household size, farm income, educational level, household monthly income, marital status, information access, formal employment status and CFG involvement significantly affect household food security status in the study area. The result indicates a positive contribution to HFSS and implies that socio-economic variables tested in this study have a significant influence on HFSS, leading to the acceptance of the second hypothesis which states that “Community food gardens have a positive effect on food security status of household in Lepelle-Nkumpi Local Municipality Limpopo province.” Therefore it is relevant to concluded that in the area of Lepelle-Nkumpi local municipality, social economic factors plays a vital role in the participation of households in CFG as well as improving the state household food security status.
- Full Text:
- Date Issued: 2014
- Authors: Malahlela, Nkele Dorcus
- Date: 2014
- Subjects: Community development -- South Africa -- Limpopo , Rural development -- South Africa -- Limpopo , Food security -- South Africa -- Limpopo , Food crops -- South Africa -- Limpopo
- Language: English
- Type: Thesis , Masters , MSc Agric (Agricultural Economics)
- Identifier: vital:11238 , http://hdl.handle.net/10353/d1021330 , Community development -- South Africa -- Limpopo , Rural development -- South Africa -- Limpopo , Food security -- South Africa -- Limpopo , Food crops -- South Africa -- Limpopo
- Description: Community food gardens are regarded as a means through which rural households can improve their livelihoods. This study explores the contribution of community food gardens (CFG) to livelihoods in the Lepelle-Nkumpi local municipality in the Limpopo province. The objectives of this study are, firstly to explore the reason behind CFG participation and the reasons behind the participating possibility. Secondly, the study seeks to identify the socio-economic factors influencing the participation of households in CFG and lastly to determine the influence of CFG and other socio-economic variables on household food security status (HFSS). Descriptive statistical analysis was used to describe the socio-economic characteristics and the reasons behind CFG participation and the reasons behind the participating possibility. The binary logistic regression model was used to analyse the determinants of household participation in community food gardens as well as the contribution of CFG to HFSS on Statistical Package for Social Science (SPSS) software version 21. Through a structured questionnaire, data was collected from a sample of 180 households which was obtained using multistage sampling. Descriptive results on the characteristics of sampled households revealed that there are high levels of food security in the area with 70% being food secure of which around 42.2% are CFG participants and 30% are food insecure. Furthermore the descriptive statistical analysis indicated that participation of households in CFG is mainly to obtain a source of food among the CFG participants and to generate income amongst the non-participants. On the basis of descriptive analysis, this study concludes that source of food and income generation respectively are the main reasons behind CFG participation and the possibilities of becoming a participant. Therefore the study accepts the research hypothesis stating that “There are social and economic reasons behind household participation and the possibilities of participating in CFG”. Binary results for the determinants of CFG participation revealed that socio-economic variables such as household size, farm income, household monthly income, land size, household perception, marital status, agricultural training and homestead gardening significantly influence household decisions to participate in CFG. This is an implication that socio-economic variables tested in this study are significantly influential to the household decision to participate in CFG, leading to the acceptance of the first hypothesis which states that “Socioeconomic factors determine the community food garden ownership or participation”. The results of the contribution made by CFG to HFSS showed that socioeconomic variables such as gender, age, household size, farm income, educational level, household monthly income, marital status, information access, formal employment status and CFG involvement significantly affect household food security status in the study area. The result indicates a positive contribution to HFSS and implies that socio-economic variables tested in this study have a significant influence on HFSS, leading to the acceptance of the second hypothesis which states that “Community food gardens have a positive effect on food security status of household in Lepelle-Nkumpi Local Municipality Limpopo province.” Therefore it is relevant to concluded that in the area of Lepelle-Nkumpi local municipality, social economic factors plays a vital role in the participation of households in CFG as well as improving the state household food security status.
- Full Text:
- Date Issued: 2014
Socio-economic impacts of development initiatives led by international aid agencies in the local community of Msunduza
- Simelane, Batsabile Nokulunga
- Authors: Simelane, Batsabile Nokulunga
- Date: 2014
- Subjects: Community development -- Economic aspects -- Swaziland -- Mbabane , Community development -- Social aspects -- Swaziland -- Mbabane
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9218 , http://hdl.handle.net/10948/d1020818
- Description: Development is central to the existence of every society including demographic entities that constitute a community of people. Community development is a process designed to create conditions of economic and social progress for the entire community with its active participation and fullest possible reliance on the community development initiatives. The support of either individuals or organisations for the community to realise its full potential is essential, likewise is the role of development agencies in community development a good omen towards the advancement of human development. This research looks at a number of development initiatives presented by aid agencies aimed at improving community life, solving serious problems of quality life, social exclusion, and resources availability. The research explores the socio-economic impacts of development initiatives led by development agencies in local communities, a case study of a peri-urban community of Msunduza, Swaziland. The study was guided by five objectives: i) To evaluate the positive and negative impacts of development initiatives led by development agencies; ii) To establish to what extent the Msunduza community know community development initiatives and how they perceive them; iii) To analyse the sustainability of development initiatives/projects led by the development agencies; iv) To determine what the participatory principles of community development are in the area; v) To draw conclusions and make recommendations that will improve community development through organisational interventions.
- Full Text:
- Date Issued: 2014
- Authors: Simelane, Batsabile Nokulunga
- Date: 2014
- Subjects: Community development -- Economic aspects -- Swaziland -- Mbabane , Community development -- Social aspects -- Swaziland -- Mbabane
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9218 , http://hdl.handle.net/10948/d1020818
- Description: Development is central to the existence of every society including demographic entities that constitute a community of people. Community development is a process designed to create conditions of economic and social progress for the entire community with its active participation and fullest possible reliance on the community development initiatives. The support of either individuals or organisations for the community to realise its full potential is essential, likewise is the role of development agencies in community development a good omen towards the advancement of human development. This research looks at a number of development initiatives presented by aid agencies aimed at improving community life, solving serious problems of quality life, social exclusion, and resources availability. The research explores the socio-economic impacts of development initiatives led by development agencies in local communities, a case study of a peri-urban community of Msunduza, Swaziland. The study was guided by five objectives: i) To evaluate the positive and negative impacts of development initiatives led by development agencies; ii) To establish to what extent the Msunduza community know community development initiatives and how they perceive them; iii) To analyse the sustainability of development initiatives/projects led by the development agencies; iv) To determine what the participatory principles of community development are in the area; v) To draw conclusions and make recommendations that will improve community development through organisational interventions.
- Full Text:
- Date Issued: 2014
Socio-economic importance, health and welfare aspects of donkeys (Equus asinus) used for carting in a peri-urban area of South Africa
- Authors: Marufu, Madure
- Date: 2014
- Subjects: Donkeys -- South Africa , Animal welfare , Donkeys -- Handling , Donkeys -- Health
- Language: English
- Type: Thesis , Masters , MSc Agric (Animal Science)
- Identifier: vital:11832 , http://hdl.handle.net/10353/d1019781 , Donkeys -- South Africa , Animal welfare , Donkeys -- Handling , Donkeys -- Health
- Description: The broad objective of the study was to determine the socio-economic importance, health and welfare aspects of donkeys used for carting in a peri-urban area. A survey was conducted among 71 donkey owners in Joza, a peri-urban area near Grahamstown in the Eastern Cape Province (ECP) of South Africa to investigate their perceptions on socio-economic importance, health and welfare aspects of donkeys used for transport. Two hundred and seventy-one donkeys used for carting were assessed through direct observation of health and behaviour parameters to determine their welfare status. Results revealed that donkeys are indeed of immense value to people, being used daily (54.93%) for income generation activities and at least once per month (7.08%) for domestic chores. Most of the respondents (32%) earned R 600.00 per week while 11% earned at least R 200.00 per week from carting using donkeys. Donkeys were used for carting of goods (90.14%) more than for manure (16.9%). Gender and age of owners significantly (P < 0.05) influence perceptions on source of income while education level influenced their perceptions on carting firewood, goods and water. Results on management practices and health problems encountered by working donkeys showed that most of the owners managed their animals poorly. Most donkeys were being beaten (74.65%) during work, made to travel long distances (43.66%), worked long hours (52.11%) without adequate water (59.10%) and feed supplements (83.10%). Wounds (95.97%), coughing (75.65%) and lameness (64.79%) were some of the health problems encountered by donkeys. Significant relationships (P ˂ 0.05) were observed between owners’ perceptions on management practices and health problems encountered by donkeys. Among the observed animals, 61% were thin and mostly apathetic (26.2%) than medium and fat animals. Responses to observer approaches were significantly associated with sex and body condition score (BCS), with stallions in good body condition being more aggressive. Donkeys having a BCS of 3-5 avoided chin contact either by kicking out or moving away. Results further showed that most of the donkeys were suffering from external injuries, with the hindquarters (39.85%), shoulder (32.10%) and spine (21.77%) being the mostly affected areas. The prevalence of wounds on tail-base, belly, flank and neck were seen in less than 13% of the animals. The prevalence of wounds was influenced by age and BCS of the animals. Young donkeys with good BCS were less affected than old donkeys. Lameness, poor coat condition, external parasites, abnormal mucous membrane and dental problems were observed in less than 30% of the animals. It was concluded that donkeys play a pivotal role economically and socially to the livelihoods of people in a peri-urban area (Joza) in terms of income generation and transportation. However, these animals are experiencing multiple health and welfare problems. Therefore, more access to veterinary services, training on donkey use and management, health and welfare promotion programs are of paramount importance in solving the problem of poor health and welfare in donkeys.
- Full Text:
- Date Issued: 2014
- Authors: Marufu, Madure
- Date: 2014
- Subjects: Donkeys -- South Africa , Animal welfare , Donkeys -- Handling , Donkeys -- Health
- Language: English
- Type: Thesis , Masters , MSc Agric (Animal Science)
- Identifier: vital:11832 , http://hdl.handle.net/10353/d1019781 , Donkeys -- South Africa , Animal welfare , Donkeys -- Handling , Donkeys -- Health
- Description: The broad objective of the study was to determine the socio-economic importance, health and welfare aspects of donkeys used for carting in a peri-urban area. A survey was conducted among 71 donkey owners in Joza, a peri-urban area near Grahamstown in the Eastern Cape Province (ECP) of South Africa to investigate their perceptions on socio-economic importance, health and welfare aspects of donkeys used for transport. Two hundred and seventy-one donkeys used for carting were assessed through direct observation of health and behaviour parameters to determine their welfare status. Results revealed that donkeys are indeed of immense value to people, being used daily (54.93%) for income generation activities and at least once per month (7.08%) for domestic chores. Most of the respondents (32%) earned R 600.00 per week while 11% earned at least R 200.00 per week from carting using donkeys. Donkeys were used for carting of goods (90.14%) more than for manure (16.9%). Gender and age of owners significantly (P < 0.05) influence perceptions on source of income while education level influenced their perceptions on carting firewood, goods and water. Results on management practices and health problems encountered by working donkeys showed that most of the owners managed their animals poorly. Most donkeys were being beaten (74.65%) during work, made to travel long distances (43.66%), worked long hours (52.11%) without adequate water (59.10%) and feed supplements (83.10%). Wounds (95.97%), coughing (75.65%) and lameness (64.79%) were some of the health problems encountered by donkeys. Significant relationships (P ˂ 0.05) were observed between owners’ perceptions on management practices and health problems encountered by donkeys. Among the observed animals, 61% were thin and mostly apathetic (26.2%) than medium and fat animals. Responses to observer approaches were significantly associated with sex and body condition score (BCS), with stallions in good body condition being more aggressive. Donkeys having a BCS of 3-5 avoided chin contact either by kicking out or moving away. Results further showed that most of the donkeys were suffering from external injuries, with the hindquarters (39.85%), shoulder (32.10%) and spine (21.77%) being the mostly affected areas. The prevalence of wounds on tail-base, belly, flank and neck were seen in less than 13% of the animals. The prevalence of wounds was influenced by age and BCS of the animals. Young donkeys with good BCS were less affected than old donkeys. Lameness, poor coat condition, external parasites, abnormal mucous membrane and dental problems were observed in less than 30% of the animals. It was concluded that donkeys play a pivotal role economically and socially to the livelihoods of people in a peri-urban area (Joza) in terms of income generation and transportation. However, these animals are experiencing multiple health and welfare problems. Therefore, more access to veterinary services, training on donkey use and management, health and welfare promotion programs are of paramount importance in solving the problem of poor health and welfare in donkeys.
- Full Text:
- Date Issued: 2014
Sources of advertisement messages and their impacts on purchasing behaviour: a case study of Walter Sisulu University students
- Authors: Oladimeji, Olawumi Kate
- Date: 2014
- Language: English
- Type: Thesis , Masters , M Soc Sc (Com)
- Identifier: vital:11371 , http://hdl.handle.net/10353/d1015413
- Description: The purpose of this research was to investigate the sources of advertisement messages and the impacts they have on the buying behaviour of students of Walter Sisulu University (WSU), and examine whether traditional mass media advertising still influences the students’ decision to buy and whether advancement in communication technology affects how the students receive information. This study also investigated the impact of traditional mass media advertising in comparison to new media advertising. Questionnaires were administered to students of WSU, Mthatha campus. The survey was conducted within the period of February 2013 – March 2013. The desired sample size was 270 students. A final sample of 220 valid responses was analysed, representing 81% of the desired sample. The study revealed that majority are aware of television while billboards and direct mails have the least awareness. The results also revealed that 78% of the respondents felt that traditional mass media still influences their buying behaviour, (90%) of the respondents prefer the traditional mass media advertising. This study demonstrated that the students of WSU are aware and exposed to the various sources of advertisement messages. In addition, existing literature and this research report have shown that the various mediums have distinctive characteristics which make them unique. In spite of the advent of modern technology, the traditional mass media still influences buying behaviour with television being the most influential media.
- Full Text:
- Date Issued: 2014
- Authors: Oladimeji, Olawumi Kate
- Date: 2014
- Language: English
- Type: Thesis , Masters , M Soc Sc (Com)
- Identifier: vital:11371 , http://hdl.handle.net/10353/d1015413
- Description: The purpose of this research was to investigate the sources of advertisement messages and the impacts they have on the buying behaviour of students of Walter Sisulu University (WSU), and examine whether traditional mass media advertising still influences the students’ decision to buy and whether advancement in communication technology affects how the students receive information. This study also investigated the impact of traditional mass media advertising in comparison to new media advertising. Questionnaires were administered to students of WSU, Mthatha campus. The survey was conducted within the period of February 2013 – March 2013. The desired sample size was 270 students. A final sample of 220 valid responses was analysed, representing 81% of the desired sample. The study revealed that majority are aware of television while billboards and direct mails have the least awareness. The results also revealed that 78% of the respondents felt that traditional mass media still influences their buying behaviour, (90%) of the respondents prefer the traditional mass media advertising. This study demonstrated that the students of WSU are aware and exposed to the various sources of advertisement messages. In addition, existing literature and this research report have shown that the various mediums have distinctive characteristics which make them unique. In spite of the advent of modern technology, the traditional mass media still influences buying behaviour with television being the most influential media.
- Full Text:
- Date Issued: 2014
South African criminal justice : a paradigm shift to victim-centred restorative justice?
- Authors: Apollos, Dumisani
- Date: 2014
- Subjects: Restorative justice -- South Africa , Apartheid -- South Africa -- History , Democracy -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10183 , http://hdl.handle.net/10948/d1020078
- Description: The focal point of this treatise is the evaluation of the paradigm shift that has taken place in our South African criminal justice system post 1994. This shift is seen as a move away from a retribution approach to a more victim-centred approach. One needs to remember that the previous regime had unfair and unjust laws: to do away with such laws an interim constitution1 was enacted in Parliament in 1993 and became operational on 27 April 1994. It was the fundamental law of South Africa. This was later repealed by the final Constitution 2 on 4 April 1997. In its preamble it states categorically that it seeks to establish a “society based on democratic values, social justice and fundamental human rights” and “(to) lay the foundations for a democratic and open society in which government is based on the will of the people and every citizen is equally protected by law”. One of the priorities of democratic government in 1996 was the National Crime Prevention Strategy3 (hereafter referred to as the NCPS). It was designed to reduce the high level of crime in our country and has four pillars: the criminal justice process; reducing crime through environmental design; public values and education and trans-national crime. Pillar one is seen as a move away from retribution as punishment towards a system of restorative justice 4. Furthermore the South African government is a signatory to various international laws, treaties and declarations that uphold victims’ rights. One example would be the United Nations Declaration on the Basic Principle of Justice for Victims of Crime and abuse of Power 1985 - in fact the Victims’ Charter is compliant with this declaration. Yet one cannot negate the fact that in the last two decades the status of victims has altered significantly: there has been some development in the transformation of the criminal justice system. Since 1994 the focus gradually shifted from an adversarial and retributive criminal justice to that of restorative justice. This shift is vindicated by following examples: the adoption of the NCPS; the Truth and Reconciliation Commission 5 (hereafter referred to as the TRC); the adoption of the Service Charter for Victims of Crime 6(hereafter referred to as the Victims’ Charter); the enactment of the Child Justice Act7; and case laws which applied restorative justice principles such as S v Maluleke and S v Saayman. Therefore this treatise will evaluate the application of a restorative system by looking at the definition of restorative justice; government commitments to the system; the enactment of Acts and policies that support the system. This will be done in relation to the victims.
- Full Text:
- Date Issued: 2014
- Authors: Apollos, Dumisani
- Date: 2014
- Subjects: Restorative justice -- South Africa , Apartheid -- South Africa -- History , Democracy -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:10183 , http://hdl.handle.net/10948/d1020078
- Description: The focal point of this treatise is the evaluation of the paradigm shift that has taken place in our South African criminal justice system post 1994. This shift is seen as a move away from a retribution approach to a more victim-centred approach. One needs to remember that the previous regime had unfair and unjust laws: to do away with such laws an interim constitution1 was enacted in Parliament in 1993 and became operational on 27 April 1994. It was the fundamental law of South Africa. This was later repealed by the final Constitution 2 on 4 April 1997. In its preamble it states categorically that it seeks to establish a “society based on democratic values, social justice and fundamental human rights” and “(to) lay the foundations for a democratic and open society in which government is based on the will of the people and every citizen is equally protected by law”. One of the priorities of democratic government in 1996 was the National Crime Prevention Strategy3 (hereafter referred to as the NCPS). It was designed to reduce the high level of crime in our country and has four pillars: the criminal justice process; reducing crime through environmental design; public values and education and trans-national crime. Pillar one is seen as a move away from retribution as punishment towards a system of restorative justice 4. Furthermore the South African government is a signatory to various international laws, treaties and declarations that uphold victims’ rights. One example would be the United Nations Declaration on the Basic Principle of Justice for Victims of Crime and abuse of Power 1985 - in fact the Victims’ Charter is compliant with this declaration. Yet one cannot negate the fact that in the last two decades the status of victims has altered significantly: there has been some development in the transformation of the criminal justice system. Since 1994 the focus gradually shifted from an adversarial and retributive criminal justice to that of restorative justice. This shift is vindicated by following examples: the adoption of the NCPS; the Truth and Reconciliation Commission 5 (hereafter referred to as the TRC); the adoption of the Service Charter for Victims of Crime 6(hereafter referred to as the Victims’ Charter); the enactment of the Child Justice Act7; and case laws which applied restorative justice principles such as S v Maluleke and S v Saayman. Therefore this treatise will evaluate the application of a restorative system by looking at the definition of restorative justice; government commitments to the system; the enactment of Acts and policies that support the system. This will be done in relation to the victims.
- Full Text:
- Date Issued: 2014
South African International Relations (Ir) and the China-Africa relationship: a critical reflection
- Authors: Walker, Timothy Charles
- Date: 2014
- Subjects: South Africa -- Relations -- China , China -- Relations -- South Africa , International relations -- Philosophy , Critical theory
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2885 , http://hdl.handle.net/10962/d1015518
- Description: South African International Relations (IR) is a prominent source of China-Africa research and analysis, producing reports, journal articles and books that seek to illuminate the emerging relationship between China and Africa. It plays an important role in the framing of the relationship, as well as how it is perceived outside of the discipline. However, critical concerns have been raised about the context within which South African IR operates. It is therefore important that IR research, including its assumptions, dominant concepts, professed values and aspirations to studying the China-Africa relationship, be critically examined. The aim of this thesis is to contribute to critical thinking in South African IR by opening up for future discussion the new directions and possibilities for China-Africa IR. Utilising a critique located in Critical International Relations Theory (CIRT), this thesis critically reflects upon both the context of South African IR’s China-Africa research and the perspectives it has produced. The thesis argues that in spite of many descriptive and empirical studies, China- Africa research is theoretically underdeveloped in South African IR. Further, it argues that theoretical work is marginalised despite the fact that both historical and contemporary research relies on concepts drawn from IR theory. South African IR’s focus on policy relevance is advanced as a reason for the prevalence of theoretical underdevelopment. This thesis concludes by reviewing arguments for the improved use of IR theory in China-Africa IR, which will lead to a better understanding of this important relationship.
- Full Text:
- Date Issued: 2014
- Authors: Walker, Timothy Charles
- Date: 2014
- Subjects: South Africa -- Relations -- China , China -- Relations -- South Africa , International relations -- Philosophy , Critical theory
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2885 , http://hdl.handle.net/10962/d1015518
- Description: South African International Relations (IR) is a prominent source of China-Africa research and analysis, producing reports, journal articles and books that seek to illuminate the emerging relationship between China and Africa. It plays an important role in the framing of the relationship, as well as how it is perceived outside of the discipline. However, critical concerns have been raised about the context within which South African IR operates. It is therefore important that IR research, including its assumptions, dominant concepts, professed values and aspirations to studying the China-Africa relationship, be critically examined. The aim of this thesis is to contribute to critical thinking in South African IR by opening up for future discussion the new directions and possibilities for China-Africa IR. Utilising a critique located in Critical International Relations Theory (CIRT), this thesis critically reflects upon both the context of South African IR’s China-Africa research and the perspectives it has produced. The thesis argues that in spite of many descriptive and empirical studies, China- Africa research is theoretically underdeveloped in South African IR. Further, it argues that theoretical work is marginalised despite the fact that both historical and contemporary research relies on concepts drawn from IR theory. South African IR’s focus on policy relevance is advanced as a reason for the prevalence of theoretical underdevelopment. This thesis concludes by reviewing arguments for the improved use of IR theory in China-Africa IR, which will lead to a better understanding of this important relationship.
- Full Text:
- Date Issued: 2014
South African VAT implications in respect of supplies by non residents to residents
- Authors: Burger, Bianca
- Date: 2014
- Subjects: Electronic commerce -- Taxation -- Law and legislation , Business enterprises -- Taxation -- Law and legislation , Value-added tax -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8962 , http://hdl.handle.net/10948/d1019977
- Description: Paragraph 7(1) of the VAT Act provides for the charging of VAT at 14 percent on the supply of goods or services by a vendor in the course or furtherance of an ‘enterprise’, the importation into South Africa of goods by any person or the supply of ‘imported services’. The term ‘enterprise’ has been interpreted to require an on-going activity and therefore once off sales should be excluded. The sale must relate to enterprise activities, thereby excluding private sales. Furthermore the enterprise activities are required to be carried out in the Republic or partly in the Republic. Establishing whether the enterprise activities are carried out in the Republic remains a contentious issue as the VAT Act does not specify the minimum required business activities to meet this criterion. ‘Imported services’ excludes services imported for the purposes of making taxable supplies and the liability of accounting for VAT on ‘imported services’ lies with the recipient of the imported service. Supplies (imported services) which are chargeable in terms of s 7(1)(a) and supplies, which if made in the Republic, are exempt from VAT or zero rated. ‘Imported services’ definition requires services to be consumed in South Africa. Services offered outside South Africa therefore generally do not qualify as imported services even the South African entity benefits from such services, for example a training course attended in a foreign country. Technological developments in the field of e-commerce globally have required countries to examine VAT laws relating to e-commerce. Extensive research has been done by the OECD on this topic, with reports issued on recommendations of how e-commerce should be taxed. Most guidance issued by the OECD on taxing e-commerce relates to indirect electronic commerce, which refers to goods or services where ordering, payment and delivery occur on line. Distinction is drawn between taxation of business-to-business transactions and business-to-consumer transactions. The OECD suggests that the ‘reverse-charge’ or self-assessment method should be applied to the taxing of B2B transactions resulting in minimal compliance and administrative costs. It is further recommended that for B2C transactions place of consumption should be defined as the recipient’s usual jurisdiction of residence and that non-resident suppliers should be required to register and pay VAT in the jurisdiction of the consumer, as this would result in the most effective tax collection method. ‘Enterprise’ includes electronic services from a foreign supplier where the recipient is a resident of South Africa or where the payment originated from a South African bank account. The Minister’s regulation, which came into effect on 1 June 2014, includes the following items in the definition of electronic services: educational services, games, online auction services, miscellaneous services and subscription services. The South African VAT legislation draws no distinction between B2B and B2C supplies of electronic services. The reasoning behind this was to avoid situations in which private customers could pose as business customers in order to avoid the levying of tax. A review of the services currently included in the Minister’s regulation on electronic services indicate that services that would relate to B2B supplies have mostly been excluded from the regulation. Effectively the South African VAT legislation manages to indirectly exclude B2B supplies from the definition of electronic services and therefore achieves the objective of minimising the administrative burden on B2B supplies.
- Full Text:
- Date Issued: 2014
- Authors: Burger, Bianca
- Date: 2014
- Subjects: Electronic commerce -- Taxation -- Law and legislation , Business enterprises -- Taxation -- Law and legislation , Value-added tax -- Law and legislation -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:8962 , http://hdl.handle.net/10948/d1019977
- Description: Paragraph 7(1) of the VAT Act provides for the charging of VAT at 14 percent on the supply of goods or services by a vendor in the course or furtherance of an ‘enterprise’, the importation into South Africa of goods by any person or the supply of ‘imported services’. The term ‘enterprise’ has been interpreted to require an on-going activity and therefore once off sales should be excluded. The sale must relate to enterprise activities, thereby excluding private sales. Furthermore the enterprise activities are required to be carried out in the Republic or partly in the Republic. Establishing whether the enterprise activities are carried out in the Republic remains a contentious issue as the VAT Act does not specify the minimum required business activities to meet this criterion. ‘Imported services’ excludes services imported for the purposes of making taxable supplies and the liability of accounting for VAT on ‘imported services’ lies with the recipient of the imported service. Supplies (imported services) which are chargeable in terms of s 7(1)(a) and supplies, which if made in the Republic, are exempt from VAT or zero rated. ‘Imported services’ definition requires services to be consumed in South Africa. Services offered outside South Africa therefore generally do not qualify as imported services even the South African entity benefits from such services, for example a training course attended in a foreign country. Technological developments in the field of e-commerce globally have required countries to examine VAT laws relating to e-commerce. Extensive research has been done by the OECD on this topic, with reports issued on recommendations of how e-commerce should be taxed. Most guidance issued by the OECD on taxing e-commerce relates to indirect electronic commerce, which refers to goods or services where ordering, payment and delivery occur on line. Distinction is drawn between taxation of business-to-business transactions and business-to-consumer transactions. The OECD suggests that the ‘reverse-charge’ or self-assessment method should be applied to the taxing of B2B transactions resulting in minimal compliance and administrative costs. It is further recommended that for B2C transactions place of consumption should be defined as the recipient’s usual jurisdiction of residence and that non-resident suppliers should be required to register and pay VAT in the jurisdiction of the consumer, as this would result in the most effective tax collection method. ‘Enterprise’ includes electronic services from a foreign supplier where the recipient is a resident of South Africa or where the payment originated from a South African bank account. The Minister’s regulation, which came into effect on 1 June 2014, includes the following items in the definition of electronic services: educational services, games, online auction services, miscellaneous services and subscription services. The South African VAT legislation draws no distinction between B2B and B2C supplies of electronic services. The reasoning behind this was to avoid situations in which private customers could pose as business customers in order to avoid the levying of tax. A review of the services currently included in the Minister’s regulation on electronic services indicate that services that would relate to B2B supplies have mostly been excluded from the regulation. Effectively the South African VAT legislation manages to indirectly exclude B2B supplies from the definition of electronic services and therefore achieves the objective of minimising the administrative burden on B2B supplies.
- Full Text:
- Date Issued: 2014
Spirit possession and social panic: Amakhosi possession and behaviour among learners in selected schools in Mdantsane Township
- Authors: Meveni, Siphiwo Douglas
- Date: 2014
- Subjects: Spirit possession -- South Africa -- Eastern Cape , Cults -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sc (Anthropology)
- Identifier: vital:11775 , http://hdl.handle.net/10353/d1018564 , Spirit possession -- South Africa -- Eastern Cape , Cults -- South Africa -- Eastern Cape
- Description: This research sought to investigate the phenomenon of strange behaviour related to spirit possession called amakhosi in Mdantsane Township in East London in the Eastern Cape Province of South Africa. This spirit phenomenon has recently been prevalent in Township schools in the Eastern and Western Cape Provinces where school children were said to be possessed by a spirit which caused them to demonstrate a strange kind of destructive behaviour. These occurrences were also reported in the newspapers and community radio stations. All these media communications reported that teachers, parents and community leaders were increasingly concerned over a growing trend wherein children purchase muti called amakhosi which makes them to behave mysteriously and at times climbed school walls with their bear hands and at time becoming violent to the extent of threatening other learners and educators. The informants included community members, learners and educators. In a mainly qualitative research method, empirical data was collected from five selected high schools by means of observations, individual interviews and group discussions. The main aim of this study was to better understand this amakhosi phenomenon and to determine whether it is a spiritual, drug related or a social phenomenon. The findings of the study suggested that amakhosi possession is partly a spiritual phenomenon and should not be overlooked as it can result into serious crimes leading to death just like in the recent cases of satanic killing reported among the youth in South Africa. Secondly, there is also a strong element of drug abuse among the youth associated with amakhosi rituals. Lastly, amakhosi is more than just a spiritual issue. It is a socio-economic problem which mostly involves the youth who are struggling in identifying their roles and positions in the post apartheid South Africa. The main recommendation is that the amakhosi phenomenon needs a „wholistic‟ approach and not to just intervention by involvement of prayers and traditional healers.
- Full Text:
- Date Issued: 2014
- Authors: Meveni, Siphiwo Douglas
- Date: 2014
- Subjects: Spirit possession -- South Africa -- Eastern Cape , Cults -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sc (Anthropology)
- Identifier: vital:11775 , http://hdl.handle.net/10353/d1018564 , Spirit possession -- South Africa -- Eastern Cape , Cults -- South Africa -- Eastern Cape
- Description: This research sought to investigate the phenomenon of strange behaviour related to spirit possession called amakhosi in Mdantsane Township in East London in the Eastern Cape Province of South Africa. This spirit phenomenon has recently been prevalent in Township schools in the Eastern and Western Cape Provinces where school children were said to be possessed by a spirit which caused them to demonstrate a strange kind of destructive behaviour. These occurrences were also reported in the newspapers and community radio stations. All these media communications reported that teachers, parents and community leaders were increasingly concerned over a growing trend wherein children purchase muti called amakhosi which makes them to behave mysteriously and at times climbed school walls with their bear hands and at time becoming violent to the extent of threatening other learners and educators. The informants included community members, learners and educators. In a mainly qualitative research method, empirical data was collected from five selected high schools by means of observations, individual interviews and group discussions. The main aim of this study was to better understand this amakhosi phenomenon and to determine whether it is a spiritual, drug related or a social phenomenon. The findings of the study suggested that amakhosi possession is partly a spiritual phenomenon and should not be overlooked as it can result into serious crimes leading to death just like in the recent cases of satanic killing reported among the youth in South Africa. Secondly, there is also a strong element of drug abuse among the youth associated with amakhosi rituals. Lastly, amakhosi is more than just a spiritual issue. It is a socio-economic problem which mostly involves the youth who are struggling in identifying their roles and positions in the post apartheid South Africa. The main recommendation is that the amakhosi phenomenon needs a „wholistic‟ approach and not to just intervention by involvement of prayers and traditional healers.
- Full Text:
- Date Issued: 2014
Storying the career development of black South African female university students
- Authors: Chetty, Candice
- Date: 2014
- Subjects: Career development , Counseling in higher education , College students, Black
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9974 , http://hdl.handle.net/10948/d1021056
- Description: Career psychology in South Africa has traditionally been constituted by assessment methods, counselling practices and research objectives of a modernist-positivist paradigm. This paradigm has been limited in its consideration and integration of the broad range of contextual factors that may influence the career development of individuals. This study is based on the Systems Theory Framework of career development, an overarching theoretical framework of career development that is able to acknowledge the complexity of career development processes and assist in engaging with contexts of that complexity. Seven Xhosa-speaking Black South African female university students were invited to story their career development within their unique individual contexts. In collaborating with the participants, the study adopted an exploratory collective case study research design. The My Systems of Career Influences reflection process was primarily used to obtain the qualitative data. Based on the need that arose in the career counselling process, the quantitative data were generated from the Values Scale (VS), the Life Roles Inventory (LRI), the Commitment to Career Choices Scale (CCCS), and the Jung Personality Questionnaire (JPQ). The study is particularly relevant given the growing need for the development of non-discriminatory career assessment and counselling collaborations between counsellors and clients who need to navigate unique and diverse South African contexts. Key words: career counselling, career development, constructivism, My System of Career Influences (MSCI), narrative career counselling, qualitative career assessment, South African female university students, storytelling approach, Systems Theory Framework (STF).
- Full Text:
- Date Issued: 2014
- Authors: Chetty, Candice
- Date: 2014
- Subjects: Career development , Counseling in higher education , College students, Black
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9974 , http://hdl.handle.net/10948/d1021056
- Description: Career psychology in South Africa has traditionally been constituted by assessment methods, counselling practices and research objectives of a modernist-positivist paradigm. This paradigm has been limited in its consideration and integration of the broad range of contextual factors that may influence the career development of individuals. This study is based on the Systems Theory Framework of career development, an overarching theoretical framework of career development that is able to acknowledge the complexity of career development processes and assist in engaging with contexts of that complexity. Seven Xhosa-speaking Black South African female university students were invited to story their career development within their unique individual contexts. In collaborating with the participants, the study adopted an exploratory collective case study research design. The My Systems of Career Influences reflection process was primarily used to obtain the qualitative data. Based on the need that arose in the career counselling process, the quantitative data were generated from the Values Scale (VS), the Life Roles Inventory (LRI), the Commitment to Career Choices Scale (CCCS), and the Jung Personality Questionnaire (JPQ). The study is particularly relevant given the growing need for the development of non-discriminatory career assessment and counselling collaborations between counsellors and clients who need to navigate unique and diverse South African contexts. Key words: career counselling, career development, constructivism, My System of Career Influences (MSCI), narrative career counselling, qualitative career assessment, South African female university students, storytelling approach, Systems Theory Framework (STF).
- Full Text:
- Date Issued: 2014
Strategies for promoting ethics within the SAPS
- Authors: McCarthy, Charlton Shamus
- Date: 2014
- Subjects: Police ethics -- South Africa , Law enforcement -- Moral and ethical aspects , Police -- South Africa -- Conduct of life
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/8553 , vital:26406
- Description: Corruption and unethical management is a legitimate global concern as it can have a direct and substantial impact on the longevity and the success of an organisation, and a country. As a result much attention has been given to unethical behavior and organisational ethical violations over the last decade. Recent events have indicated that ethics management is an organisational concern with mammoth implications for organisations. The aim of this study was to investigate the development of strategies for the promotion of ethics and the impact of unethical conduct on an organisation. A direct link exists between employee behaviour and the organisational environment. The desired ethical environment is negatively affected if the employees cannot distinguish between right and wrong and do not act ethically when confronted with ethical dilemmas. Proposed ethics strategies may also be impacted on by the unethical behaviour of the leadership of organisations, compliance with legislation and poorly managed ethics strategies. The main research problem in this study was to identify what strategies could be adopted to create an ethical culture within an organisation. To achieve this objective a model was developed, proposed and supported with literature and the research study. A research questionnaire was designed to obtain the relevant data that was distributed to previously identified respondents. The results indicated that the majority employees were of the view that the organisational environment and leadership was not ethical and that the majority of employees were not actively pursuing an ethical environment. Findings indicated that the majority of employees felt that contributing factors to achieve an ethical environment was present, but ethic strategies were ineffective and poorly managed. The proposed study model, when implemented successfully, would allow the organisation the effective application of ethic interventions.
- Full Text:
- Date Issued: 2014
- Authors: McCarthy, Charlton Shamus
- Date: 2014
- Subjects: Police ethics -- South Africa , Law enforcement -- Moral and ethical aspects , Police -- South Africa -- Conduct of life
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/8553 , vital:26406
- Description: Corruption and unethical management is a legitimate global concern as it can have a direct and substantial impact on the longevity and the success of an organisation, and a country. As a result much attention has been given to unethical behavior and organisational ethical violations over the last decade. Recent events have indicated that ethics management is an organisational concern with mammoth implications for organisations. The aim of this study was to investigate the development of strategies for the promotion of ethics and the impact of unethical conduct on an organisation. A direct link exists between employee behaviour and the organisational environment. The desired ethical environment is negatively affected if the employees cannot distinguish between right and wrong and do not act ethically when confronted with ethical dilemmas. Proposed ethics strategies may also be impacted on by the unethical behaviour of the leadership of organisations, compliance with legislation and poorly managed ethics strategies. The main research problem in this study was to identify what strategies could be adopted to create an ethical culture within an organisation. To achieve this objective a model was developed, proposed and supported with literature and the research study. A research questionnaire was designed to obtain the relevant data that was distributed to previously identified respondents. The results indicated that the majority employees were of the view that the organisational environment and leadership was not ethical and that the majority of employees were not actively pursuing an ethical environment. Findings indicated that the majority of employees felt that contributing factors to achieve an ethical environment was present, but ethic strategies were ineffective and poorly managed. The proposed study model, when implemented successfully, would allow the organisation the effective application of ethic interventions.
- Full Text:
- Date Issued: 2014
Strategies for the implementation of clinical practice guidelines in the intensive care : a systematic review
- Authors: Mpasa, Ferestas
- Date: 2014
- Subjects: Systematic reviews (Medical research) , Physician practice patterns , Intensive care units
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10059 , http://hdl.handle.net/10948/d1020046
- Description: Implementation strategies for the use of clinical practice guidelines are an integral component in bridging the gap between the best research evidence and clinical practice. However, despite some remarkable investments in health research regarding clinical practice guidelines implementation strategies, it is not yet known which of these are the most effective for intensive care units. The purpose of this research study was to systematically identify and /or search, appraise, extract and synthesize the best available evidence for clinical practice guidelines implementation strategies in intensive care units, in order to develop a draft guideline for clinical practice guidelines implementation strategies in the intensive care units. A systematic review design was used to systematically identify and /or search, appraise, extract and synthesize the best available evidence from the eligible included Level 2 studies (randomized controlled trials and quasi-experimental studies). Level 2 studies were applicable because they present robust evidence in the research results regarding effectiveness of clinical practice guideline implementation strategies. Furthermore, although other systematic reviews conducted in this area before, they included studies of In addition, no systematic review was identified that reviewed Level 2 studies and developed a guideline for clinical practice guideline implementation strategies in the intensive care units. Hence, including only Level 2 studies was distinctive to this research study. Databases searched included: CINAHL with full text, Google Scholar, Academic search complete, Cochrane Register for Randomized Controlled Trials Issue 8 of 12, August 2013, and MEDLINE via PUBMED. Hand search in bound journals was also done. The search strategy identified 315 potentially relevant studies. After the process of critical appraisal, thirteen Level 2 studies were identified as relevant for the review. Of the 13 relevant studies, 10 were randomized controlled trials and three were quasi experimental studies. After the critical appraisal ten RCTs were included in the systematic review. Three studies (quasi-experimental) were excluded on the basis of methodological quality after the critical appraisal and agreement by the two independent reviewers. The Joanna Briggs Institute Critical Appraisal MASTARI Instrument for Randomized Controlled trials/ Experimental studies, and The Joanna Briggs Institute data extraction tools were used to critically appraise, and extract data from the ten included randomized controlled trials. The two reviewers who performed the critical appraisal were qualified critical care professional nurses and experts in research methodology. These reviewers conducted the critical appraisal independently to ensure the objectivity of the process. Appropriate ethical considerations were maintained throughout the process of the research study. The results indicated that 80 percent of the included studies were conducted in adult intensive care units while 20 percent were conducted in the neonatal intensive care units. Furthermore, 60 percent of the studies were conducted in the United States of America, 10 percent in France, a further 10 percent in Taiwan, another 10 percent in England and yet another 10 percfent was conducted in Australia and Newzealand. The included studies utilized more than one (multifaceted) implementation strategies to implement clinical practice guidelines in the intensive care units. The first most utilized were: printed educational materials; Information/ educational sessions/meetings; audit and feedback and champion/local opinion leaders; seconded by educational outreach visits; and computer or internet usage. Third most used were active/passive reminders; systems support; academic detailing/ one-on-one sessions teleconferences/videoconferences and workshops/in services. Fourth most used were ollaboration/interdisciplinary teams; slide shows, teleconferences/videoconferences and discussions. Fifth most used were practical training; monitoring visits and grand rounds. However all the strategies were of equal importance. Conclusively, the included studies utilized multifaceted implementation strategies. However, no study indicated the use of a guideline for the implementation strategies in the process of clinical practice guidelines implementation. The systematic review developed a draft guideline for clinical practice guideline implementation strategies in the intensive care units. The guideline will enhance effective implementation of clinical practice guidelines in such a complex environment.
- Full Text:
- Date Issued: 2014
- Authors: Mpasa, Ferestas
- Date: 2014
- Subjects: Systematic reviews (Medical research) , Physician practice patterns , Intensive care units
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: vital:10059 , http://hdl.handle.net/10948/d1020046
- Description: Implementation strategies for the use of clinical practice guidelines are an integral component in bridging the gap between the best research evidence and clinical practice. However, despite some remarkable investments in health research regarding clinical practice guidelines implementation strategies, it is not yet known which of these are the most effective for intensive care units. The purpose of this research study was to systematically identify and /or search, appraise, extract and synthesize the best available evidence for clinical practice guidelines implementation strategies in intensive care units, in order to develop a draft guideline for clinical practice guidelines implementation strategies in the intensive care units. A systematic review design was used to systematically identify and /or search, appraise, extract and synthesize the best available evidence from the eligible included Level 2 studies (randomized controlled trials and quasi-experimental studies). Level 2 studies were applicable because they present robust evidence in the research results regarding effectiveness of clinical practice guideline implementation strategies. Furthermore, although other systematic reviews conducted in this area before, they included studies of In addition, no systematic review was identified that reviewed Level 2 studies and developed a guideline for clinical practice guideline implementation strategies in the intensive care units. Hence, including only Level 2 studies was distinctive to this research study. Databases searched included: CINAHL with full text, Google Scholar, Academic search complete, Cochrane Register for Randomized Controlled Trials Issue 8 of 12, August 2013, and MEDLINE via PUBMED. Hand search in bound journals was also done. The search strategy identified 315 potentially relevant studies. After the process of critical appraisal, thirteen Level 2 studies were identified as relevant for the review. Of the 13 relevant studies, 10 were randomized controlled trials and three were quasi experimental studies. After the critical appraisal ten RCTs were included in the systematic review. Three studies (quasi-experimental) were excluded on the basis of methodological quality after the critical appraisal and agreement by the two independent reviewers. The Joanna Briggs Institute Critical Appraisal MASTARI Instrument for Randomized Controlled trials/ Experimental studies, and The Joanna Briggs Institute data extraction tools were used to critically appraise, and extract data from the ten included randomized controlled trials. The two reviewers who performed the critical appraisal were qualified critical care professional nurses and experts in research methodology. These reviewers conducted the critical appraisal independently to ensure the objectivity of the process. Appropriate ethical considerations were maintained throughout the process of the research study. The results indicated that 80 percent of the included studies were conducted in adult intensive care units while 20 percent were conducted in the neonatal intensive care units. Furthermore, 60 percent of the studies were conducted in the United States of America, 10 percent in France, a further 10 percent in Taiwan, another 10 percent in England and yet another 10 percfent was conducted in Australia and Newzealand. The included studies utilized more than one (multifaceted) implementation strategies to implement clinical practice guidelines in the intensive care units. The first most utilized were: printed educational materials; Information/ educational sessions/meetings; audit and feedback and champion/local opinion leaders; seconded by educational outreach visits; and computer or internet usage. Third most used were active/passive reminders; systems support; academic detailing/ one-on-one sessions teleconferences/videoconferences and workshops/in services. Fourth most used were ollaboration/interdisciplinary teams; slide shows, teleconferences/videoconferences and discussions. Fifth most used were practical training; monitoring visits and grand rounds. However all the strategies were of equal importance. Conclusively, the included studies utilized multifaceted implementation strategies. However, no study indicated the use of a guideline for the implementation strategies in the process of clinical practice guidelines implementation. The systematic review developed a draft guideline for clinical practice guideline implementation strategies in the intensive care units. The guideline will enhance effective implementation of clinical practice guidelines in such a complex environment.
- Full Text:
- Date Issued: 2014
Strategy execution in a manufacturing facility in the Nelson Mandela Bay
- Authors: Butler, Charles Ted
- Date: 2014
- Subjects: Business planning -- South Africa -- Nelson Mandela Bay Municipality , Manufacturing industries -- South Africa -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8843 , http://hdl.handle.net/10948/d1020075
- Description: The most basic role of operations is to execute a strategy (Pycraft, Singh, Phihlela, Slack, Chambers & Johnston, 2010). The aim of this study is to make a contribution to operational performance by analysing the effectiveness of strategy execution at a confectionery manufacturing facility situated in the Nelson Mandela Bay (NMB). The primary objective of the study is to improve strategy execution at this manufacturing facility by investigating the influence of strategy; business processes; organisational factors; human resources; macro factors and leadership toward the success of strategy execution. The researcher gave consideration to whether this manufacturing facility measured on a strategy grid, is in a professional (champions’) league, headed towards a spectacular success; or headed towards being relegated and failure; or will it achieve somewhere in between like playing in the amateur (first division). The study was conducted in the quantitative paradigm. Data was collected using a structured questionnaire and sourced instruments were used to measure the variables in the hypothesised model. The objective of the questionnaire was to analyse the respondent’s understanding of how strategy is executed, thereby identifying the possible areas that need to be improved. It was found that most managers disagreed that the business processes, organisational factors and human resources effectively support the execution of the operational strategy and that the average response from the managers were neutral in respect of effectiveness of strategy and leadership. The inference is that although this manufacturing facility has a fair strategy, execution thereof is below average. The researcher therefore deduced that the most appropriate section for the manufacturing facility is between the first division and relegation. The research findings indicate that the management team is not effectively executing the operational strategy. The management implication of this finding translates into lost opportunities. These lost opportunities probably contributed to the poor results reported by the plant director in his quarterly performance review. The empirical results are discussed and recommendations are proposed to improve strategy execution, complementing the manufacturing facility’s goals to deliver the best performance and ultimately realise their stated vision: “to be the best and most loved confectionary site in the world”.
- Full Text:
- Date Issued: 2014
- Authors: Butler, Charles Ted
- Date: 2014
- Subjects: Business planning -- South Africa -- Nelson Mandela Bay Municipality , Manufacturing industries -- South Africa -- Nelson Mandela Bay Municipality
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8843 , http://hdl.handle.net/10948/d1020075
- Description: The most basic role of operations is to execute a strategy (Pycraft, Singh, Phihlela, Slack, Chambers & Johnston, 2010). The aim of this study is to make a contribution to operational performance by analysing the effectiveness of strategy execution at a confectionery manufacturing facility situated in the Nelson Mandela Bay (NMB). The primary objective of the study is to improve strategy execution at this manufacturing facility by investigating the influence of strategy; business processes; organisational factors; human resources; macro factors and leadership toward the success of strategy execution. The researcher gave consideration to whether this manufacturing facility measured on a strategy grid, is in a professional (champions’) league, headed towards a spectacular success; or headed towards being relegated and failure; or will it achieve somewhere in between like playing in the amateur (first division). The study was conducted in the quantitative paradigm. Data was collected using a structured questionnaire and sourced instruments were used to measure the variables in the hypothesised model. The objective of the questionnaire was to analyse the respondent’s understanding of how strategy is executed, thereby identifying the possible areas that need to be improved. It was found that most managers disagreed that the business processes, organisational factors and human resources effectively support the execution of the operational strategy and that the average response from the managers were neutral in respect of effectiveness of strategy and leadership. The inference is that although this manufacturing facility has a fair strategy, execution thereof is below average. The researcher therefore deduced that the most appropriate section for the manufacturing facility is between the first division and relegation. The research findings indicate that the management team is not effectively executing the operational strategy. The management implication of this finding translates into lost opportunities. These lost opportunities probably contributed to the poor results reported by the plant director in his quarterly performance review. The empirical results are discussed and recommendations are proposed to improve strategy execution, complementing the manufacturing facility’s goals to deliver the best performance and ultimately realise their stated vision: “to be the best and most loved confectionary site in the world”.
- Full Text:
- Date Issued: 2014
Stratigraphy and sedimentology of the Mzamba formation in the Eastern Cape, South Africa
- Authors: Susela, Zamampondo
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: vital:11529 , http://hdl.handle.net/10353/d1019807
- Description: This research project is aimed at providing new information to the stratigraphy, sedimentology, palaeontology and diagenesis of the Mzamba Formation. The study area is located at the south of Port Edward, Eastern Cape. The methodologies employed in this study include field geological investigation and sampling, stratigraphic measurement and logging, thin-section microscope study, powder samples of XRD analysis, and SEM-EDX analysis of rock textures and mineral compositions. The stratigraphy of the Mzamba Formation can be divided into three newly established members, i.e. the Lower Conglomerate Member, Middle Silt/Mudstone-Shell Bed Member and Upper Mudstone-Shell Bed Member with a total thickness of 31.26m in an inland borehole and 30.05m in the field measurement. The Lower Conglomerate Member is 2.65m thick and consists of pebbly conglomerate with coarse sandstone, shell fragments and silicified wood trunks, representing shallow marine nearshore deposits. The Middle Silt/Mudstone and Shell Bed Member is 9.5 m thick and consists of black mudstone and fine-grained siltstone alternated with medium grained pecten beds, which was deposited in a storm influenced deeper marine environment. The Upper Mudstone-Shell Bed Member is 17.9m thick and is made up of fine-mudstones with articulated pecten layers which were deposited in a deep and quiet marine environment. Petrology studies showed that the Mzamba Formation consists of mixed sediments of carbonate and siliciclastic rocks. Siliciclastic rocks include pebbly conglomerates, medium to coarse sandstones and fine-grained mudstones, whereas carbonate rocks include packstone, wackstone and grainstone (pecten beds). The formation shows cyclical pattern of a series fining-upward cyclicities, changing from bottom conglomerate to sandstone, then upward repeated series of cyclotherms from pecten bed to mudstone. Mineralogy of the Mzamba Formation consists of terrigenous minerals of quartz, orthoclase, plagioclase, muscovite and various igneous and metamorphic rock-lithics, clay minerals of smectite, illite and sericite, and carbonate minerals of calcite and dolomite; with minor diagenetic minerals of pyrite, glauconite, hematite, gypsum, albite and organic maceral of vitrinite. Heavy minerals of garnet, zircon and rutile are minor minerals in the strata, which were detrital in origin. Mzamba Formation is a fossiliferous sequence, and contains both fauna and flora fossils in the strata. The pecten beds host well-preserved bivalve, gastropod, brachiopoda, ammonite, and echinoderm; whereas trace fossils of coprolites, burrows and tracks, as well as plant fossils of silicified wood trunks were also found in the formation. Some new fossil species were collected and studied, which include Bivalve: Pteriaceae, Pinnacea and Ostreacea; Gastropod: Cerithiacea and Mesogastopoda; Echinoderm: Echinocystoidea and Crinoidea. The benthonic species predominate in the lower part in the succession, whilst the planktonic species are abundant in the upper part of the sequence, which points to increase in water depths of the depositional environment. Based on lithology, sedimentary structures, and stratum architecture, seven different facies have been distinguished. Facies A (Flat bedded pebbly conglomerate), Facie B (Cross-bedded coarse calcareous sandstone facies), Facies C (Burrowed sandstone facies), Facies D (Shell-fragmental fine-grained calcareous sandstone facies), Facies E (Horizontal bedded calcareous mudstone facies), Facies F (Calcareous patch reef), Facies G (Wash out reef facies). Wash out reef facies is rich in algae, bivalve shells, broken oysters, coral fragments and small pebbles. Four types of cements were found in the Mzamba Formation, including calcite, smectite, illite and quartz. Calcite cement can be further classified into two types, micrite calcite cement and sparite calcite cement. The clay cement consists of smectite and illite and mainly occurs as matrix. The isopachous rim calcite and bright isopachous rim of silica cements indicate diagenesis in a marine phreatic zone. Authigenic minerals which formed in early diagenetic stage include quartz, plagioclase, glauconite and organic maceral of vitrinite. Three stages of diagenesis have been recognised in the sequence, i.e. syndiagenesis, early and late diagenesis. Glauconite pellets and worm faecal pellets were formed in syndiagenetic stage; cementation and authigenic minerals were formed in early diagenetic stage; whereas clay mineral conversion of smectite to illite, quartz overgrowth, bioclast recrystallization and calcite replacement took place during late diagenetic stage. The pebbly conglomerate at the bottom of the Mzamba Formation represents high energy deposits in a shallow marine environment; the grain-size gradually becomes finer in the middle succession and finest mudstone facies at the top of the succession, which represents deep marine deposits. Meanwhile, benthonic fossils are dominant in the bottom succession while plankton fossils are more abundant in the top succession. These features indicate that the Mzamba Formation constitutes a perfect transgression sequence, and the depositional environments started from shallow marine near shore environment, and gradually shifted to a deep marine quiet water environment.
- Full Text:
- Date Issued: 2014
- Authors: Susela, Zamampondo
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: vital:11529 , http://hdl.handle.net/10353/d1019807
- Description: This research project is aimed at providing new information to the stratigraphy, sedimentology, palaeontology and diagenesis of the Mzamba Formation. The study area is located at the south of Port Edward, Eastern Cape. The methodologies employed in this study include field geological investigation and sampling, stratigraphic measurement and logging, thin-section microscope study, powder samples of XRD analysis, and SEM-EDX analysis of rock textures and mineral compositions. The stratigraphy of the Mzamba Formation can be divided into three newly established members, i.e. the Lower Conglomerate Member, Middle Silt/Mudstone-Shell Bed Member and Upper Mudstone-Shell Bed Member with a total thickness of 31.26m in an inland borehole and 30.05m in the field measurement. The Lower Conglomerate Member is 2.65m thick and consists of pebbly conglomerate with coarse sandstone, shell fragments and silicified wood trunks, representing shallow marine nearshore deposits. The Middle Silt/Mudstone and Shell Bed Member is 9.5 m thick and consists of black mudstone and fine-grained siltstone alternated with medium grained pecten beds, which was deposited in a storm influenced deeper marine environment. The Upper Mudstone-Shell Bed Member is 17.9m thick and is made up of fine-mudstones with articulated pecten layers which were deposited in a deep and quiet marine environment. Petrology studies showed that the Mzamba Formation consists of mixed sediments of carbonate and siliciclastic rocks. Siliciclastic rocks include pebbly conglomerates, medium to coarse sandstones and fine-grained mudstones, whereas carbonate rocks include packstone, wackstone and grainstone (pecten beds). The formation shows cyclical pattern of a series fining-upward cyclicities, changing from bottom conglomerate to sandstone, then upward repeated series of cyclotherms from pecten bed to mudstone. Mineralogy of the Mzamba Formation consists of terrigenous minerals of quartz, orthoclase, plagioclase, muscovite and various igneous and metamorphic rock-lithics, clay minerals of smectite, illite and sericite, and carbonate minerals of calcite and dolomite; with minor diagenetic minerals of pyrite, glauconite, hematite, gypsum, albite and organic maceral of vitrinite. Heavy minerals of garnet, zircon and rutile are minor minerals in the strata, which were detrital in origin. Mzamba Formation is a fossiliferous sequence, and contains both fauna and flora fossils in the strata. The pecten beds host well-preserved bivalve, gastropod, brachiopoda, ammonite, and echinoderm; whereas trace fossils of coprolites, burrows and tracks, as well as plant fossils of silicified wood trunks were also found in the formation. Some new fossil species were collected and studied, which include Bivalve: Pteriaceae, Pinnacea and Ostreacea; Gastropod: Cerithiacea and Mesogastopoda; Echinoderm: Echinocystoidea and Crinoidea. The benthonic species predominate in the lower part in the succession, whilst the planktonic species are abundant in the upper part of the sequence, which points to increase in water depths of the depositional environment. Based on lithology, sedimentary structures, and stratum architecture, seven different facies have been distinguished. Facies A (Flat bedded pebbly conglomerate), Facie B (Cross-bedded coarse calcareous sandstone facies), Facies C (Burrowed sandstone facies), Facies D (Shell-fragmental fine-grained calcareous sandstone facies), Facies E (Horizontal bedded calcareous mudstone facies), Facies F (Calcareous patch reef), Facies G (Wash out reef facies). Wash out reef facies is rich in algae, bivalve shells, broken oysters, coral fragments and small pebbles. Four types of cements were found in the Mzamba Formation, including calcite, smectite, illite and quartz. Calcite cement can be further classified into two types, micrite calcite cement and sparite calcite cement. The clay cement consists of smectite and illite and mainly occurs as matrix. The isopachous rim calcite and bright isopachous rim of silica cements indicate diagenesis in a marine phreatic zone. Authigenic minerals which formed in early diagenetic stage include quartz, plagioclase, glauconite and organic maceral of vitrinite. Three stages of diagenesis have been recognised in the sequence, i.e. syndiagenesis, early and late diagenesis. Glauconite pellets and worm faecal pellets were formed in syndiagenetic stage; cementation and authigenic minerals were formed in early diagenetic stage; whereas clay mineral conversion of smectite to illite, quartz overgrowth, bioclast recrystallization and calcite replacement took place during late diagenetic stage. The pebbly conglomerate at the bottom of the Mzamba Formation represents high energy deposits in a shallow marine environment; the grain-size gradually becomes finer in the middle succession and finest mudstone facies at the top of the succession, which represents deep marine deposits. Meanwhile, benthonic fossils are dominant in the bottom succession while plankton fossils are more abundant in the top succession. These features indicate that the Mzamba Formation constitutes a perfect transgression sequence, and the depositional environments started from shallow marine near shore environment, and gradually shifted to a deep marine quiet water environment.
- Full Text:
- Date Issued: 2014
Stratigraphy, sedimentary facies and diagenesis of the ECCA group, Karoo supergroup in the Eastern Cape, South Africa
- Authors: Nyathi, Nonhlanhla
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: vital:11528 , http://hdl.handle.net/10353/d1019776
- Description: This is a MSc research project, and is aimed at the new insight on the stratigraphy, sedimentary facies, diagenesis and depositional environments of the Ecca Group, Karoo Supergroup in the Eastern Cape Province. Methodologies used in this research include field investigation, stratigraphic logging, thin-section microscope study, X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) analyses. The stratigraphy of the Ecca Group is divided into five formations, namely the Prince Albert Formation, Whitehill Formation, Collingham Formation, Rippon Formation and the Fort Brown Formation from bottom upward. Based on the field investigation and laboratory correlation, the Prince Albert, Whitehill, Collingham, and Fort Brown Formations can each be subdivided into two new members, i.e. lower member and upper member; whereas three new members have been proposed for the Rippon Formation, i.e. lower, middle and upper members. The Ecca Group sediments were accumulated in various depositional environments, from bottom of deep marine environment, passed through the middle of deltaic environment, and ended in a lacustrine environment. The Prince Albert Formation, Whitehill Formation and the Collingham Formation were all deposited in a deep marine basin, whilst the Rippon Formation was laid down in a deltaic environment. As the climate gradually became warmer and drier, the top Fort Brown Formation was lastly deposited in a lacustrine environment. The stratigraphic succession of the Ecca Group constitutes a perfect regression sequence, indicating that the marine water gradually retreated and the sea-level gradually dropped. The rocks in the Ecca Group are mainly terrigenous sandstone and mudstone with some coarse grain-sized siliciclastic rock of conglomerate. The sandstones are dominated by feldspathic graywackes with minor quartz-wackes, and there are no arenites in the Ecca Group. Whereas the mudstones are dominated by grayish mudrocks and black shales, purer claystone was found in the turbidite facies of the Collingham Formation, which probably has economic significance for the future since the reserve is quite large. Optical microscope, XRD and SEM analyses demonstrated that the minerals in the Ecca Group include detrital minerals of quartz, orthoclase, microcline, plagioclase, biotite, muscovite; and clay minerals (smectite, kaolinite, illite and sericite). These minerals constitute the rock framework grains and cements whereas; the authigenic minerals of calcite and hematite were formed during diagenesis. Accessory minerals such as rutile and zircon are the heavy minerals present in the strata, and occur only in a small amount. Based on the lithologies, sedimentary structures and sequence stacking patterns, ten sedimentary facies have been recognised, namely 1) Grayish laminated and thin bedded shale facies, 2) Grayish laminated shale and intercalated chert facies, 3) Grayish rhythmite facies (all the three facies above were deposited in deep marine water); 4) Flat and lenticular bedded graywacke facies, 5) Grayish alternating mudstone and sandstone facies, 6) Dark organic rich mudstone facies, 7) Fossil bearing mudstone facies, 8) Laminated and thin bedded black mudstone with lenticular siltstone facies, 9) Interbedded grayish sandstone and mudstone facies (above Facies 4-9 were deposited in deltaic environment and appeared in the Rippon Formation); and 10) Varved rhythmic mudstone facies, which occurs only in the Fort Brown Formation and represents lacustrine sediments. Four types of cements have been identified in the rocks of the Ecca Group, including quartz, smectite, calcite and feldspar cements. The first three cement types are the major cement types, whilst the feldspar cement is minor and occurs only locally. Recrystallisation in Ecca sediments includes quartz, feldspar, clay mineral recrystallisation and conversion from smectite and kaolinite to illite and then to sericite. Replacement involves calcite replacing quartz, feldspar and clay matrix; accompanied by albitization, i.e. albite replacing other feldspar minerals in a deep burial environment. Dissolution in the Ecca Group involved calcite and kaolinite dissolving and leaching, which created more pore-space and increased porosity. The sediments of the Ecca Group went through three stages of digenesis, namely the early stage, the late stage and the up lift stage which led the rocks being exposed on the Earth’s surface and being weathered. In each stage, some minerals became unstable, then replaced by a more stable mineral suitable for the new diagenetic environment. Precipitation of cements and formation of authigenic minerals mostly occurred in the early diagenetic stage, which led the soft sediments becoming a hard rock; whilst recrystallisation, replacement, and dissolution took place mostly in the later diageneti
- Full Text:
- Date Issued: 2014
- Authors: Nyathi, Nonhlanhla
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Geology)
- Identifier: vital:11528 , http://hdl.handle.net/10353/d1019776
- Description: This is a MSc research project, and is aimed at the new insight on the stratigraphy, sedimentary facies, diagenesis and depositional environments of the Ecca Group, Karoo Supergroup in the Eastern Cape Province. Methodologies used in this research include field investigation, stratigraphic logging, thin-section microscope study, X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) analyses. The stratigraphy of the Ecca Group is divided into five formations, namely the Prince Albert Formation, Whitehill Formation, Collingham Formation, Rippon Formation and the Fort Brown Formation from bottom upward. Based on the field investigation and laboratory correlation, the Prince Albert, Whitehill, Collingham, and Fort Brown Formations can each be subdivided into two new members, i.e. lower member and upper member; whereas three new members have been proposed for the Rippon Formation, i.e. lower, middle and upper members. The Ecca Group sediments were accumulated in various depositional environments, from bottom of deep marine environment, passed through the middle of deltaic environment, and ended in a lacustrine environment. The Prince Albert Formation, Whitehill Formation and the Collingham Formation were all deposited in a deep marine basin, whilst the Rippon Formation was laid down in a deltaic environment. As the climate gradually became warmer and drier, the top Fort Brown Formation was lastly deposited in a lacustrine environment. The stratigraphic succession of the Ecca Group constitutes a perfect regression sequence, indicating that the marine water gradually retreated and the sea-level gradually dropped. The rocks in the Ecca Group are mainly terrigenous sandstone and mudstone with some coarse grain-sized siliciclastic rock of conglomerate. The sandstones are dominated by feldspathic graywackes with minor quartz-wackes, and there are no arenites in the Ecca Group. Whereas the mudstones are dominated by grayish mudrocks and black shales, purer claystone was found in the turbidite facies of the Collingham Formation, which probably has economic significance for the future since the reserve is quite large. Optical microscope, XRD and SEM analyses demonstrated that the minerals in the Ecca Group include detrital minerals of quartz, orthoclase, microcline, plagioclase, biotite, muscovite; and clay minerals (smectite, kaolinite, illite and sericite). These minerals constitute the rock framework grains and cements whereas; the authigenic minerals of calcite and hematite were formed during diagenesis. Accessory minerals such as rutile and zircon are the heavy minerals present in the strata, and occur only in a small amount. Based on the lithologies, sedimentary structures and sequence stacking patterns, ten sedimentary facies have been recognised, namely 1) Grayish laminated and thin bedded shale facies, 2) Grayish laminated shale and intercalated chert facies, 3) Grayish rhythmite facies (all the three facies above were deposited in deep marine water); 4) Flat and lenticular bedded graywacke facies, 5) Grayish alternating mudstone and sandstone facies, 6) Dark organic rich mudstone facies, 7) Fossil bearing mudstone facies, 8) Laminated and thin bedded black mudstone with lenticular siltstone facies, 9) Interbedded grayish sandstone and mudstone facies (above Facies 4-9 were deposited in deltaic environment and appeared in the Rippon Formation); and 10) Varved rhythmic mudstone facies, which occurs only in the Fort Brown Formation and represents lacustrine sediments. Four types of cements have been identified in the rocks of the Ecca Group, including quartz, smectite, calcite and feldspar cements. The first three cement types are the major cement types, whilst the feldspar cement is minor and occurs only locally. Recrystallisation in Ecca sediments includes quartz, feldspar, clay mineral recrystallisation and conversion from smectite and kaolinite to illite and then to sericite. Replacement involves calcite replacing quartz, feldspar and clay matrix; accompanied by albitization, i.e. albite replacing other feldspar minerals in a deep burial environment. Dissolution in the Ecca Group involved calcite and kaolinite dissolving and leaching, which created more pore-space and increased porosity. The sediments of the Ecca Group went through three stages of digenesis, namely the early stage, the late stage and the up lift stage which led the rocks being exposed on the Earth’s surface and being weathered. In each stage, some minerals became unstable, then replaced by a more stable mineral suitable for the new diagenetic environment. Precipitation of cements and formation of authigenic minerals mostly occurred in the early diagenetic stage, which led the soft sediments becoming a hard rock; whilst recrystallisation, replacement, and dissolution took place mostly in the later diageneti
- Full Text:
- Date Issued: 2014
Structural bioinformatics analysis of the Hsp40 and Hsp70 molecular chaperones from humans
- Authors: Adeyemi, Samson Adebowale
- Date: 2014
- Subjects: Structural bioinformatics , Molecular chaperones , Heat shock proteins , Protein-protein interactions , Biomolecules
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4171 , http://hdl.handle.net/10962/d1020962
- Description: HSP70 is one of the most important families of molecular chaperone that regulate the folding and transport of client proteins in an ATP dependent manner. The ATPase activity of HSP70 is stimulated through an interaction with its family of HSP40 co-chaperones. There is evidence to suggest that specific partnerships occur between the different HSP40 and HSP70 isoforms. While some of the residues involved in the interaction are known, many of the residues governing the specificity of HSP40-HSP70 partnerships are not precisely defined. It is not currently possible to predict which HSP40 and HSP70 isoforms will interact. We attempted to use bioinformatics to identify residues involved in the specificity of the interaction between the J domain from HSP40 and the ATPase domain from the HSP70 isoforms from humans. A total of 49 HSP40 and 13 HSP70 sequences from humans were retrieved and used for subsequent analyses. The HSP40 J domains and HSP70 ATPase domains were extracted using python scripts and classified according to the subcellular localization of the proteins using localization prediction programs. Motif analysis was carried out using the full length HSP40 proteins and Multiple Sequence Alignment (MSA) was performed to identify conserved residues that may contribute to the J domain – ATPase domain interactions. Phylogenetic inference of the proteins was also performed in order to study their evolutionary relationship. Homology models of the J domains and ATPase domains were generated. The corresponding models were docked using HADDOCK server in order to analyze possible putative interactions between the partner proteins using the Protein Interactions Calculator (PIC). The level of residue conservation was found to be higher in Type I and II HSP40 than in Type III J proteins. While highly conserved residues on helixes II and III could play critical roles in J domain interactions with corresponding HSP70s, conserved residues on helixes I and IV seemed to be significant in keeping the J domain in its right orientation for functional interactions with HSP70s. Our results also showed that helixes II and III formed the interaction interface for binding to HSP70 ATPase domain as well as the linker residues. Finally, data based docking procedures, such as applied in this study, could be an effective method to investigate protein-protein interactions complex of biomolecules.
- Full Text:
- Date Issued: 2014
- Authors: Adeyemi, Samson Adebowale
- Date: 2014
- Subjects: Structural bioinformatics , Molecular chaperones , Heat shock proteins , Protein-protein interactions , Biomolecules
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4171 , http://hdl.handle.net/10962/d1020962
- Description: HSP70 is one of the most important families of molecular chaperone that regulate the folding and transport of client proteins in an ATP dependent manner. The ATPase activity of HSP70 is stimulated through an interaction with its family of HSP40 co-chaperones. There is evidence to suggest that specific partnerships occur between the different HSP40 and HSP70 isoforms. While some of the residues involved in the interaction are known, many of the residues governing the specificity of HSP40-HSP70 partnerships are not precisely defined. It is not currently possible to predict which HSP40 and HSP70 isoforms will interact. We attempted to use bioinformatics to identify residues involved in the specificity of the interaction between the J domain from HSP40 and the ATPase domain from the HSP70 isoforms from humans. A total of 49 HSP40 and 13 HSP70 sequences from humans were retrieved and used for subsequent analyses. The HSP40 J domains and HSP70 ATPase domains were extracted using python scripts and classified according to the subcellular localization of the proteins using localization prediction programs. Motif analysis was carried out using the full length HSP40 proteins and Multiple Sequence Alignment (MSA) was performed to identify conserved residues that may contribute to the J domain – ATPase domain interactions. Phylogenetic inference of the proteins was also performed in order to study their evolutionary relationship. Homology models of the J domains and ATPase domains were generated. The corresponding models were docked using HADDOCK server in order to analyze possible putative interactions between the partner proteins using the Protein Interactions Calculator (PIC). The level of residue conservation was found to be higher in Type I and II HSP40 than in Type III J proteins. While highly conserved residues on helixes II and III could play critical roles in J domain interactions with corresponding HSP70s, conserved residues on helixes I and IV seemed to be significant in keeping the J domain in its right orientation for functional interactions with HSP70s. Our results also showed that helixes II and III formed the interaction interface for binding to HSP70 ATPase domain as well as the linker residues. Finally, data based docking procedures, such as applied in this study, could be an effective method to investigate protein-protein interactions complex of biomolecules.
- Full Text:
- Date Issued: 2014
Studies on the antimicrobial, antioxidant and antiproliferative potential of the ethyl acetate extract and compounds of Peltophorum africanum
- Authors: Okeleye, Benjamin Ifeoluwa
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11282 , http://hdl.handle.net/10353/d1016165
- Description: Cells are constantly exposed to a variety of oxidizing agents, some of which are necessary for life. Oxidants produced in excess can cause an imbalance, leading to oxidative stress, especially in chronic bacterial, viral, and parasitic infections. This can result to damage of biomolecules such as lipids, proteins, and DNA, hence, an increased risk for cancer. Plants have a long history of use in the treatment of cancer. Plant secondary metabolites have proved to be an excellent reservoir of new medical compounds. Fruits, vegetables, and whole grains contain a wide variety of antioxidant phytochemicals, such as phenolics and carotenoids, and may help protect cellular systems from oxidative damage and also may lower the risk of chronic diseases. Peltophorum africanum, a member of the family Fabaceae (Sond) is also known as the African weeping wattle and is used in traditional medicine in South Africa. This study investigated the antimicrobial, antioxidant and antiproliferative potential of the ethyl acetate extract and compounds of Peltophorum africanum in order to validate its pharmacological use. The study assessed the in vitro antimicrobial activity of ethyl acetate extract (EAE) of Peltophorum africanum stem bark and its fractions by the agar well and macrodilution methods. The toxicity on a normal human liver cell (Chang liver cell) and antiproliferation of human breast (MCF-7), colon (HT-29) and cervical (HeLa) cancer cell lines were determined using the CellTiter-Blue cell viability assay and the mechanism of action delineated using the Nucleic Acid and Protein Purification Nucleospin® Tissue Kit, Scanning Electron Microscopy (SEM), Propidium iodide (PI) and Acridine orange (AO) double-staining techniques, the Cleaved Caspase 3 (Asp 175) Alexa Fluor® 488 Antibody and the Coulter® DNA PrepTM Reagents Kit. Purification and identification of the compounds from EAE and fractions as well as the morphological alteration of bacteria, yeast and cancer cells were determined using thin layer chromatography, infrared spectra fingerprint and GC-MS analysis, micro-dilution and scanning electron microscopy with energy-dispersive X-ray analysis. In vitro antioxidant activity of EAE was determined by means of radical scavenging and ferric reducing power analysis using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), 2, 2`-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) kit, hydrogen peroxide (H2O2), iron (iii) chloride (Fe3+) and nitric oxide (NO). To assess the likely effects of secondary metabolites on the activities observed; total proanthocyanidins, phenolics, flavonols, and flavonoids were determined using standard phytochemical methods. Data were analyzed by one way analysis of variance (ANOVA; SPSS Version 17.0, 2011), regression analysis (MINITAB, version 12 for windows), probit analysis test (software NCSS, 2007) and GraphPad Prism4 software package. The p-values < 0.05 were considered significant. Marked activity of the extract was observed against Plesiomonas shigelloides ATCC 51903, with MIC and MLC values of 0.15625 and 0.3125mg/mL, respectively. The extract was both bactericidal (MICindex ≤ 2) and bacteriostatic/fungistatic (MICindex > 2) in activity. Lethal dose at 50 (LD50) showed 82.64 ± 1.40 degree of toxicity at 24 hrs, and 95 percentile of cell death dose activity ranged from log 3.12 ± 0.01 to 4.59 ± 0.03. The activity of the eight fractions tested ranged from 1.0 ± 0.5 to 3.7 ± 1.6 mg/mL (IC50) and from 2.1 ± 0.8 to 6.25 ± 0 mg/mL (IC90) (Chapter 3). Due to the effect of compounds present in the crude extract and fractions, the P. aeruginosa treated with EAE had a reduction of sodium from 5.55 % (untreated) - 1.50 %. For C. albicans, pottasium was reduced from 4.16 % (untreated) - 0.76 % (T1). Remarkable morphological alterations were observed including deformation of the germ tubes and perforation of the cell wall (Chapter 4). Extract scavenging activity of 88.73± 6.69 % (25 μg mL-1), 53.93±1.09 % (25 μg mL-1) were recorded for H2O2 and NO respectively with proanthocyanidins (92.18±4.68 mg/g) occurring more (p < 0.05) in the extract compared to all other phenolics compounds (Chapter 5). Significant reduction in cell viability of the cells was noted as the MCF-7 cells were reduced from 100 - 54.33±1.84 % after 72 hrs of treatment with 5 μg/mL of EAE (P. value < 0.05). TEt10 was cytotoxic against human normal cells (chang liver cell) at EC50 of 37 μg/mL and 74 μg/mL after 24 and 48 h of treatment respectively. Marked antiproliferative activity of 13.2 μg/mL (EC50) was observed when HeLa cells were treated for 48 h. Internucleosomal DNA of MCF-7, HT-29 and HeLa cells randomly fragmented into an uninterrupted spectrum of sizes, complemented by the intercalation of nucleic acid-specific fluorochromes by PI and AO spotting two phases of apoptosis; early (EA) and late (LA) apoptosis. Distinctive ultramorphological changes observed include; cell shrinkage, membrane blebbing, and typical cell induced death. The study also recorded 705.102 ± 28.56 % TEt10 caspase-3 activity compared to curcumin 592.857 ± 165.76 % (positive control) and untreated (negative control; 100 ± 15.81 %) cells. Percentage HeLa cell with Sub-G1 DNA phase increased from 0.13 ± 0.06 % (negative control) to 13.8 ± 3.04 % compared to curcumin (8.17 ± 2.20 %) after treatment with TEt10. The compounds identified in the fractions including Colchicine, N-(trifluoroacetyl)methyl-N-deacetyl-, Lupeol and .gamma.-Sitosterol may be responsible for the induction of apoptosis observed and could be further studied in vivo as a potential template for new anticancer treatment (Chapter 6 & 7).
- Full Text:
- Date Issued: 2014
- Authors: Okeleye, Benjamin Ifeoluwa
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11282 , http://hdl.handle.net/10353/d1016165
- Description: Cells are constantly exposed to a variety of oxidizing agents, some of which are necessary for life. Oxidants produced in excess can cause an imbalance, leading to oxidative stress, especially in chronic bacterial, viral, and parasitic infections. This can result to damage of biomolecules such as lipids, proteins, and DNA, hence, an increased risk for cancer. Plants have a long history of use in the treatment of cancer. Plant secondary metabolites have proved to be an excellent reservoir of new medical compounds. Fruits, vegetables, and whole grains contain a wide variety of antioxidant phytochemicals, such as phenolics and carotenoids, and may help protect cellular systems from oxidative damage and also may lower the risk of chronic diseases. Peltophorum africanum, a member of the family Fabaceae (Sond) is also known as the African weeping wattle and is used in traditional medicine in South Africa. This study investigated the antimicrobial, antioxidant and antiproliferative potential of the ethyl acetate extract and compounds of Peltophorum africanum in order to validate its pharmacological use. The study assessed the in vitro antimicrobial activity of ethyl acetate extract (EAE) of Peltophorum africanum stem bark and its fractions by the agar well and macrodilution methods. The toxicity on a normal human liver cell (Chang liver cell) and antiproliferation of human breast (MCF-7), colon (HT-29) and cervical (HeLa) cancer cell lines were determined using the CellTiter-Blue cell viability assay and the mechanism of action delineated using the Nucleic Acid and Protein Purification Nucleospin® Tissue Kit, Scanning Electron Microscopy (SEM), Propidium iodide (PI) and Acridine orange (AO) double-staining techniques, the Cleaved Caspase 3 (Asp 175) Alexa Fluor® 488 Antibody and the Coulter® DNA PrepTM Reagents Kit. Purification and identification of the compounds from EAE and fractions as well as the morphological alteration of bacteria, yeast and cancer cells were determined using thin layer chromatography, infrared spectra fingerprint and GC-MS analysis, micro-dilution and scanning electron microscopy with energy-dispersive X-ray analysis. In vitro antioxidant activity of EAE was determined by means of radical scavenging and ferric reducing power analysis using 2, 2-diphenyl-1-picrylhydrazyl (DPPH), 2, 2`-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) kit, hydrogen peroxide (H2O2), iron (iii) chloride (Fe3+) and nitric oxide (NO). To assess the likely effects of secondary metabolites on the activities observed; total proanthocyanidins, phenolics, flavonols, and flavonoids were determined using standard phytochemical methods. Data were analyzed by one way analysis of variance (ANOVA; SPSS Version 17.0, 2011), regression analysis (MINITAB, version 12 for windows), probit analysis test (software NCSS, 2007) and GraphPad Prism4 software package. The p-values < 0.05 were considered significant. Marked activity of the extract was observed against Plesiomonas shigelloides ATCC 51903, with MIC and MLC values of 0.15625 and 0.3125mg/mL, respectively. The extract was both bactericidal (MICindex ≤ 2) and bacteriostatic/fungistatic (MICindex > 2) in activity. Lethal dose at 50 (LD50) showed 82.64 ± 1.40 degree of toxicity at 24 hrs, and 95 percentile of cell death dose activity ranged from log 3.12 ± 0.01 to 4.59 ± 0.03. The activity of the eight fractions tested ranged from 1.0 ± 0.5 to 3.7 ± 1.6 mg/mL (IC50) and from 2.1 ± 0.8 to 6.25 ± 0 mg/mL (IC90) (Chapter 3). Due to the effect of compounds present in the crude extract and fractions, the P. aeruginosa treated with EAE had a reduction of sodium from 5.55 % (untreated) - 1.50 %. For C. albicans, pottasium was reduced from 4.16 % (untreated) - 0.76 % (T1). Remarkable morphological alterations were observed including deformation of the germ tubes and perforation of the cell wall (Chapter 4). Extract scavenging activity of 88.73± 6.69 % (25 μg mL-1), 53.93±1.09 % (25 μg mL-1) were recorded for H2O2 and NO respectively with proanthocyanidins (92.18±4.68 mg/g) occurring more (p < 0.05) in the extract compared to all other phenolics compounds (Chapter 5). Significant reduction in cell viability of the cells was noted as the MCF-7 cells were reduced from 100 - 54.33±1.84 % after 72 hrs of treatment with 5 μg/mL of EAE (P. value < 0.05). TEt10 was cytotoxic against human normal cells (chang liver cell) at EC50 of 37 μg/mL and 74 μg/mL after 24 and 48 h of treatment respectively. Marked antiproliferative activity of 13.2 μg/mL (EC50) was observed when HeLa cells were treated for 48 h. Internucleosomal DNA of MCF-7, HT-29 and HeLa cells randomly fragmented into an uninterrupted spectrum of sizes, complemented by the intercalation of nucleic acid-specific fluorochromes by PI and AO spotting two phases of apoptosis; early (EA) and late (LA) apoptosis. Distinctive ultramorphological changes observed include; cell shrinkage, membrane blebbing, and typical cell induced death. The study also recorded 705.102 ± 28.56 % TEt10 caspase-3 activity compared to curcumin 592.857 ± 165.76 % (positive control) and untreated (negative control; 100 ± 15.81 %) cells. Percentage HeLa cell with Sub-G1 DNA phase increased from 0.13 ± 0.06 % (negative control) to 13.8 ± 3.04 % compared to curcumin (8.17 ± 2.20 %) after treatment with TEt10. The compounds identified in the fractions including Colchicine, N-(trifluoroacetyl)methyl-N-deacetyl-, Lupeol and .gamma.-Sitosterol may be responsible for the induction of apoptosis observed and could be further studied in vivo as a potential template for new anticancer treatment (Chapter 6 & 7).
- Full Text:
- Date Issued: 2014
Sustainable development principles in the implementation of the MyCITI transport system in Cape Town
- Authors: Nocanda, Nosabatha
- Date: 2014
- Subjects: Sustainable development -- South Africa -- Cape Town , Transportation -- South Africa -- Cape Town
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8912 , vital:26442
- Description: South Africa is a signatory to several agreements dealing with sustainable development. South Africa has also committed to meeting several Millennium Development Goals (MDGs). One of the biggest challenges facing South Africa, like many other countries, is to maintain a balance between the quest for economic growth and sustainable development. In pursuing economic success, it is often the case that insufficient time and effort are dedicated to determining whether the planned developments support sustainability principles. In some instances, developments may meet one or two sustainability principles whilst violating a number of others, potentially leading to undesirable social, economic or environmental consequences. Countries ought to ensure that projects they approve for development at local, provincial or national level are subjected to thorough scrutiny to ascertain that there is minimal violation of sustainable development principles. The development of the MyCiTi bus transport system in the City of Cape Town was assessed for its consideration of sustainable development principles during the implementation of the project. Several users and non-users of MyCiTi were interviewed regarding their experience and observation of MyCiTi’s development and roll-out relative to sustainable development principles. The results obtained are discussed in this study and the appropriate recommendations given.
- Full Text:
- Date Issued: 2014
Sustainable development principles in the implementation of the MyCITI transport system in Cape Town
- Authors: Nocanda, Nosabatha
- Date: 2014
- Subjects: Sustainable development -- South Africa -- Cape Town , Transportation -- South Africa -- Cape Town
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/8912 , vital:26442
- Description: South Africa is a signatory to several agreements dealing with sustainable development. South Africa has also committed to meeting several Millennium Development Goals (MDGs). One of the biggest challenges facing South Africa, like many other countries, is to maintain a balance between the quest for economic growth and sustainable development. In pursuing economic success, it is often the case that insufficient time and effort are dedicated to determining whether the planned developments support sustainability principles. In some instances, developments may meet one or two sustainability principles whilst violating a number of others, potentially leading to undesirable social, economic or environmental consequences. Countries ought to ensure that projects they approve for development at local, provincial or national level are subjected to thorough scrutiny to ascertain that there is minimal violation of sustainable development principles. The development of the MyCiTi bus transport system in the City of Cape Town was assessed for its consideration of sustainable development principles during the implementation of the project. Several users and non-users of MyCiTi were interviewed regarding their experience and observation of MyCiTi’s development and roll-out relative to sustainable development principles. The results obtained are discussed in this study and the appropriate recommendations given.
- Full Text:
- Date Issued: 2014
Sustainable rural development projects in Ficksburg Local Municipality
- Authors: Mamotho, Mpho Benett
- Date: 2014
- Subjects: Participatory rural appraisal -- South Africa -- Ficksburg , Rural development projects -- South Africa -- Ficksburg
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5751 , vital:20996
- Description: The current study aimed to evaluation of a Rural Development project in this case the (Kabelo Trust), by evaluating the factors that contributes to its sustainability even though 70% of the members did not undergo high school education. Qualitative research methods was employed in gathering accurate information from the project members about the strategies that they are employing in sustaining the project while many government funded project does not last for even a year. The involvement of the stakeholders like Setsoto Local Municipality, the Department of Agriculture and the Department of Rural Development and Land Reform, the role they played in the project was also explored. It was therefore suggested by the researcher that the main stakeholder which is the Department of Agriculture should assist the project in establishing market for products in other countries.
- Full Text:
- Date Issued: 2014
- Authors: Mamotho, Mpho Benett
- Date: 2014
- Subjects: Participatory rural appraisal -- South Africa -- Ficksburg , Rural development projects -- South Africa -- Ficksburg
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5751 , vital:20996
- Description: The current study aimed to evaluation of a Rural Development project in this case the (Kabelo Trust), by evaluating the factors that contributes to its sustainability even though 70% of the members did not undergo high school education. Qualitative research methods was employed in gathering accurate information from the project members about the strategies that they are employing in sustaining the project while many government funded project does not last for even a year. The involvement of the stakeholders like Setsoto Local Municipality, the Department of Agriculture and the Department of Rural Development and Land Reform, the role they played in the project was also explored. It was therefore suggested by the researcher that the main stakeholder which is the Department of Agriculture should assist the project in establishing market for products in other countries.
- Full Text:
- Date Issued: 2014
Synoptic circulation patterns and its relationship with ground thermal characteristics along an altitudinal transect on sub-Antarctic Marion Island
- Authors: Bierman, Stefni
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Geography)
- Identifier: vital:11516 , http://hdl.handle.net/10353/d1015532
- Description: The climate of Marion Island is driven by synoptic weather patterns which have also been suggested to influence the soil thermal characteristics. The primary aim of this work was to examine the effect of synoptic weather systems on soil temperature dynamics on an altitudinal gradient on the eastern side of Marion Island. The study specifically addresses the implications of climate change on future soil thermal dynamics in a maritime sub-Antarctic environment. Ground temperature were obtained from three ground temperature monitoring stations on the eastern side of Marion Island, which were established along an altitudinal gradient at Long Ridge North (200m a.s.l.), Katedraalkrans (750m a.s.l) and at Delta Extension (1000m a.s.l.). To assess the synoptic weather circulation patterns, a synoptic climate classification methodology that is based on the single station principal component (PCA) and cluster analysis were used. Results show that certain clusters were more dominant than others and over the measured time span certain synoptic weather patterns, mainly cyclonic air circulation types, have decreased while anticyclonic circulation have increased. Soil frost occurs at all three stations on Marion Island, not only under cyclonic circulations (as previously suggested) but significantly under anticyclonic air mass circulation as well. Soil frost is dependent on the duration of post-cyclonic Antarctic air mass circulation. Synoptic weather patterns are also affecting ground surface lapse rates. Changes from positive to negative lapse rates were observed and this predominantly occurred under the atmospheric circulation pattern associated with clusters that are predominantly anticyclonic. Long term climatic change as predicted by the PCA show a reduction in low pressure systems or more anticyclonic conditions affecting the island. These change will significantly affect the soil thermal dynamics at an altitudinal scale on sub-Antarctic Marion Island.
- Full Text:
- Date Issued: 2014
- Authors: Bierman, Stefni
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Geography)
- Identifier: vital:11516 , http://hdl.handle.net/10353/d1015532
- Description: The climate of Marion Island is driven by synoptic weather patterns which have also been suggested to influence the soil thermal characteristics. The primary aim of this work was to examine the effect of synoptic weather systems on soil temperature dynamics on an altitudinal gradient on the eastern side of Marion Island. The study specifically addresses the implications of climate change on future soil thermal dynamics in a maritime sub-Antarctic environment. Ground temperature were obtained from three ground temperature monitoring stations on the eastern side of Marion Island, which were established along an altitudinal gradient at Long Ridge North (200m a.s.l.), Katedraalkrans (750m a.s.l) and at Delta Extension (1000m a.s.l.). To assess the synoptic weather circulation patterns, a synoptic climate classification methodology that is based on the single station principal component (PCA) and cluster analysis were used. Results show that certain clusters were more dominant than others and over the measured time span certain synoptic weather patterns, mainly cyclonic air circulation types, have decreased while anticyclonic circulation have increased. Soil frost occurs at all three stations on Marion Island, not only under cyclonic circulations (as previously suggested) but significantly under anticyclonic air mass circulation as well. Soil frost is dependent on the duration of post-cyclonic Antarctic air mass circulation. Synoptic weather patterns are also affecting ground surface lapse rates. Changes from positive to negative lapse rates were observed and this predominantly occurred under the atmospheric circulation pattern associated with clusters that are predominantly anticyclonic. Long term climatic change as predicted by the PCA show a reduction in low pressure systems or more anticyclonic conditions affecting the island. These change will significantly affect the soil thermal dynamics at an altitudinal scale on sub-Antarctic Marion Island.
- Full Text:
- Date Issued: 2014