The coping orientation and self-esteem of black learners enrolled in under-resourced schools in the Nelson Mandela Metropole
- Authors: Ogle, Zimbini
- Date: 2012
- Subjects: Educational psychology -- South Africa -- Port Elizabeth , Educational psychology -- Study and teaching -- South Africa -- Port Elizabeth , Self-esteem -- South Africa -- Port Elizabeth -- Problems, exercises, etc. , Right to education -- South Africa -- Port Elizabeth , Public schools -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9941 , http://hdl.handle.net/10948/d1012591 , Educational psychology -- South Africa -- Port Elizabeth , Educational psychology -- Study and teaching -- South Africa -- Port Elizabeth , Self-esteem -- South Africa -- Port Elizabeth -- Problems, exercises, etc. , Right to education -- South Africa -- Port Elizabeth , Public schools -- South Africa -- Port Elizabeth
- Description: It is common knowledge that the delivery of a high quality, well-resourced educational service to learners enrolled in state schools in the Eastern Cape has ground to a halt and this lack of service delivery has now become a pervasive problem. South African education has to a large extent failed to meet the needs of Black learners. Schools, like other contexts of childhood and adolescence are intimate places where youths construct identities, build a sense of self, read how society views them, develop the capacity to sustain relations and forge the skills to initiate change. These are the contexts where youth grow or shrink. Buildings in disrepair are not, therefore, merely a distraction; they are identity producing and selfdefining. There has been much debate on the topic of self-esteem and its relationship to school performance and academic achievement. Previous studies have highlighted that selfesteem and resilience do play a role in academic achievement. Despite the many challenges facing learners in under-resourced schools, many learners have overcome such challenges and achieved academic success. This study aimed to explore and describe the coping orientation and self-esteem of Black learners enrolled in under-resourced state schools in the Nelson Mandela Metropole. An exploratory, descriptive survey design was employed and eighty-five research participants completed the Orientation to Life Questionnaire 29 Item (OLQ 29 Item), Battle‟s Culture Free Self-Esteem Inventory Form AD (CFSEI Form AD) and a biographical questionnaire. Key findings revealed fairly high mean scores on the OLQ 29 Item and low total self-esteem scores. The General, Social and Personal self-esteem of the learners were found to be average. The results also revealed that learners with a high sense of coherence are likely to have high self-esteem; hence high sense of coherence is better explained by high self-esteem and low sense of coherence is better explained by low selfesteem.
- Full Text:
- Date Issued: 2012
- Authors: Ogle, Zimbini
- Date: 2012
- Subjects: Educational psychology -- South Africa -- Port Elizabeth , Educational psychology -- Study and teaching -- South Africa -- Port Elizabeth , Self-esteem -- South Africa -- Port Elizabeth -- Problems, exercises, etc. , Right to education -- South Africa -- Port Elizabeth , Public schools -- South Africa -- Port Elizabeth
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9941 , http://hdl.handle.net/10948/d1012591 , Educational psychology -- South Africa -- Port Elizabeth , Educational psychology -- Study and teaching -- South Africa -- Port Elizabeth , Self-esteem -- South Africa -- Port Elizabeth -- Problems, exercises, etc. , Right to education -- South Africa -- Port Elizabeth , Public schools -- South Africa -- Port Elizabeth
- Description: It is common knowledge that the delivery of a high quality, well-resourced educational service to learners enrolled in state schools in the Eastern Cape has ground to a halt and this lack of service delivery has now become a pervasive problem. South African education has to a large extent failed to meet the needs of Black learners. Schools, like other contexts of childhood and adolescence are intimate places where youths construct identities, build a sense of self, read how society views them, develop the capacity to sustain relations and forge the skills to initiate change. These are the contexts where youth grow or shrink. Buildings in disrepair are not, therefore, merely a distraction; they are identity producing and selfdefining. There has been much debate on the topic of self-esteem and its relationship to school performance and academic achievement. Previous studies have highlighted that selfesteem and resilience do play a role in academic achievement. Despite the many challenges facing learners in under-resourced schools, many learners have overcome such challenges and achieved academic success. This study aimed to explore and describe the coping orientation and self-esteem of Black learners enrolled in under-resourced state schools in the Nelson Mandela Metropole. An exploratory, descriptive survey design was employed and eighty-five research participants completed the Orientation to Life Questionnaire 29 Item (OLQ 29 Item), Battle‟s Culture Free Self-Esteem Inventory Form AD (CFSEI Form AD) and a biographical questionnaire. Key findings revealed fairly high mean scores on the OLQ 29 Item and low total self-esteem scores. The General, Social and Personal self-esteem of the learners were found to be average. The results also revealed that learners with a high sense of coherence are likely to have high self-esteem; hence high sense of coherence is better explained by high self-esteem and low sense of coherence is better explained by low selfesteem.
- Full Text:
- Date Issued: 2012
Hiv/Aids communication and youth behaviour in South Africa: a study of female high school students in the Eastern Cape Province
- Authors: Mpofu, Nkosinothando
- Date: 2012
- Subjects: HIV infections -- Social aspects -- South Africa , AIDS (Disease) -- Social aspects -- South Africa , Communication in public health -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD (Com)
- Identifier: vital:11368 , http://hdl.handle.net/10353/d1015374 , HIV infections -- Social aspects -- South Africa , AIDS (Disease) -- Social aspects -- South Africa , Communication in public health -- South Africa
- Description: Human Immuno-Deficiency Virus and Acquired Immune-Deficiency Syndrome communication remains one of the most significant tools in the fight against HIV/AIDS given the absence of the cure to fight the growth and spread of the global pandemic. Through the use of information, HIV/AIDS communication seeks to empower recipients or societies with skills that will help reduce their risk of infection. South Africa has seen a high visibility of HIV/AIDS communication programmes or campaigns aimed at empowering different audiences, whilst paying particular emphasis on the most vulnerable. Young people, in particular young women, have a higher prevalence of HIV/AIDS in South Africa. This has prompted the development of many youth focused communication campaigns which have sought to address factors that increase young people`s vulnerability to HIV infection. However, despite the high visibility of HIV/AIDS communication campaigns targeting young people, high risk behaviours are still being seen among young women. Important to note are the high teenage pregnancy rates, growing abuse of substances and even the premature engagement of sexual activities among female youths. This, therefore, raises questions on the effect of HIV/AIDS communication programmes in encouraging protective behaviour against risky behavioural practices amongst young women. Using both quantitative and qualitative research approaches to this study, an investigation was conducted into whether current HIV/AIDS communication campaigns have been limited (in terms of effectiveness) when it comes to communicating with young women on issues relating to HIV/AIDS. Awareness of HIV/AIDS and HIV/AIDS communication programmes, relevance of HIV/AIDS communication programmes, the factors that influence the use and understanding of HIV/AIDS messages and the impact of HIV/AIDS communication on attitude and behaviour change amongst female youths is measured. A total of 350 questionnaire copies were self-administered to 350 participants, with a 100 percent response rate. From the 350 participants, seventy five took part in focus group discussions. Data obtained was analysed using SPSS (for descriptive statistics), and the grounded theory. The results of the study indicate that all participants were aware of HIV/AIDS with at least 60% of the participants aware of at least three HIV/AIDS communication campaigns. When measuring the relevance of HIV/AIDS communication campaigns, participants (58%) indicate that issues discussed in most HIV/AIDS communication campaigns increased the relevance of HIV/AIDS messages to young women although such relevance was, for some respondents, affected by limited access to communication campaigns. Results also show that levels of knowledge and understanding of factors that expose young women to HIV infections differed amongst participants in as much as the factors that hinder the use of advice contained in HIV/AIDS messages also differed. Sixty-nine percent of the participants have knowledge and a better understanding of factors that expose young females to HIV infections. Twenty-five percent of the participants identified peer pressure, whilst 23% identified limited access to HIV/AIDS communication campaigns and another 18% identified a disregard of HIV/AIDS messages as significant factors that limit the ability of individuals to implement advice contained in HIV/AIDS messages. The results also indicate that although HIV/AIDS communication campaigns seem to have played a role in empowering some participants, there is still a significant minority whom communication has not effectively communicated with. Based on these findings, the study suggests, amongst other things, the need to intensify current HIV/AIDS communication campaigns through the provision of consistent messages on appropriate condom use, the identification of easily accessible communication channels and the development of thought provoking and attention grabbing campaigns as well as the need to continue to directly involve young women in the processes of their own development.
- Full Text:
- Date Issued: 2012
- Authors: Mpofu, Nkosinothando
- Date: 2012
- Subjects: HIV infections -- Social aspects -- South Africa , AIDS (Disease) -- Social aspects -- South Africa , Communication in public health -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD (Com)
- Identifier: vital:11368 , http://hdl.handle.net/10353/d1015374 , HIV infections -- Social aspects -- South Africa , AIDS (Disease) -- Social aspects -- South Africa , Communication in public health -- South Africa
- Description: Human Immuno-Deficiency Virus and Acquired Immune-Deficiency Syndrome communication remains one of the most significant tools in the fight against HIV/AIDS given the absence of the cure to fight the growth and spread of the global pandemic. Through the use of information, HIV/AIDS communication seeks to empower recipients or societies with skills that will help reduce their risk of infection. South Africa has seen a high visibility of HIV/AIDS communication programmes or campaigns aimed at empowering different audiences, whilst paying particular emphasis on the most vulnerable. Young people, in particular young women, have a higher prevalence of HIV/AIDS in South Africa. This has prompted the development of many youth focused communication campaigns which have sought to address factors that increase young people`s vulnerability to HIV infection. However, despite the high visibility of HIV/AIDS communication campaigns targeting young people, high risk behaviours are still being seen among young women. Important to note are the high teenage pregnancy rates, growing abuse of substances and even the premature engagement of sexual activities among female youths. This, therefore, raises questions on the effect of HIV/AIDS communication programmes in encouraging protective behaviour against risky behavioural practices amongst young women. Using both quantitative and qualitative research approaches to this study, an investigation was conducted into whether current HIV/AIDS communication campaigns have been limited (in terms of effectiveness) when it comes to communicating with young women on issues relating to HIV/AIDS. Awareness of HIV/AIDS and HIV/AIDS communication programmes, relevance of HIV/AIDS communication programmes, the factors that influence the use and understanding of HIV/AIDS messages and the impact of HIV/AIDS communication on attitude and behaviour change amongst female youths is measured. A total of 350 questionnaire copies were self-administered to 350 participants, with a 100 percent response rate. From the 350 participants, seventy five took part in focus group discussions. Data obtained was analysed using SPSS (for descriptive statistics), and the grounded theory. The results of the study indicate that all participants were aware of HIV/AIDS with at least 60% of the participants aware of at least three HIV/AIDS communication campaigns. When measuring the relevance of HIV/AIDS communication campaigns, participants (58%) indicate that issues discussed in most HIV/AIDS communication campaigns increased the relevance of HIV/AIDS messages to young women although such relevance was, for some respondents, affected by limited access to communication campaigns. Results also show that levels of knowledge and understanding of factors that expose young women to HIV infections differed amongst participants in as much as the factors that hinder the use of advice contained in HIV/AIDS messages also differed. Sixty-nine percent of the participants have knowledge and a better understanding of factors that expose young females to HIV infections. Twenty-five percent of the participants identified peer pressure, whilst 23% identified limited access to HIV/AIDS communication campaigns and another 18% identified a disregard of HIV/AIDS messages as significant factors that limit the ability of individuals to implement advice contained in HIV/AIDS messages. The results also indicate that although HIV/AIDS communication campaigns seem to have played a role in empowering some participants, there is still a significant minority whom communication has not effectively communicated with. Based on these findings, the study suggests, amongst other things, the need to intensify current HIV/AIDS communication campaigns through the provision of consistent messages on appropriate condom use, the identification of easily accessible communication channels and the development of thought provoking and attention grabbing campaigns as well as the need to continue to directly involve young women in the processes of their own development.
- Full Text:
- Date Issued: 2012
Genetic algorithm for Artificial Neural Network training for the purpose of Automated Part Recognition
- Authors: Buys, Stefan
- Date: 2012
- Subjects: Genetic algorithms , Software architecture
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:9648 , http://hdl.handle.net/10948/d1008356 , Genetic algorithms , Software architecture
- Description: Object or part recognition is of major interest in industrial environments. Current methods implement expensive camera based solutions. There is a need for a cost effective alternative to be developed. One of the proposed methods is to overcome the hardware, camera, problem by implementing a software solution. Artificial Neural Networks (ANN) are to be used as the underlying intelligent software as they have high tolerance for noise and have the ability to generalize. A colleague has implemented a basic ANN based system comprising of an ANN and three cost effective laser distance sensors. However, the system is only able to identify 3 different parts and needed hard coding changes made by trial and error. This is not practical for industrial use in a production environment where there are a large quantity of different parts to be identified that change relatively regularly. The ability to easily train more parts is required. Difficulties associated with traditional mathematically guided training methods are discussed, which leads to the development of a Genetic Algorithm (GA) based evolutionary training method that overcomes these difficulties and makes accurate part recognition possible. An ANN hybridised with GA training is introduced and a general solution encoding scheme which is used to encode the required ANN connection weights. Experimental tests were performed in order to determine the ideal GA performance and control parameters as studies have indicated that different GA control parameters can lead to large differences in training accuracy. After performing these tests, the training accuracy was analyzed by investigation into GA performance as well as hardware based part recognition performance. This analysis identified the ideal GA control parameters when training an ANN for the purpose of part recognition and showed that the ANN generally trained well and could generalize well on data not presented to it during training.
- Full Text:
- Date Issued: 2012
- Authors: Buys, Stefan
- Date: 2012
- Subjects: Genetic algorithms , Software architecture
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:9648 , http://hdl.handle.net/10948/d1008356 , Genetic algorithms , Software architecture
- Description: Object or part recognition is of major interest in industrial environments. Current methods implement expensive camera based solutions. There is a need for a cost effective alternative to be developed. One of the proposed methods is to overcome the hardware, camera, problem by implementing a software solution. Artificial Neural Networks (ANN) are to be used as the underlying intelligent software as they have high tolerance for noise and have the ability to generalize. A colleague has implemented a basic ANN based system comprising of an ANN and three cost effective laser distance sensors. However, the system is only able to identify 3 different parts and needed hard coding changes made by trial and error. This is not practical for industrial use in a production environment where there are a large quantity of different parts to be identified that change relatively regularly. The ability to easily train more parts is required. Difficulties associated with traditional mathematically guided training methods are discussed, which leads to the development of a Genetic Algorithm (GA) based evolutionary training method that overcomes these difficulties and makes accurate part recognition possible. An ANN hybridised with GA training is introduced and a general solution encoding scheme which is used to encode the required ANN connection weights. Experimental tests were performed in order to determine the ideal GA performance and control parameters as studies have indicated that different GA control parameters can lead to large differences in training accuracy. After performing these tests, the training accuracy was analyzed by investigation into GA performance as well as hardware based part recognition performance. This analysis identified the ideal GA control parameters when training an ANN for the purpose of part recognition and showed that the ANN generally trained well and could generalize well on data not presented to it during training.
- Full Text:
- Date Issued: 2012
Foundation phase teachers’ knowledge, attitudes and practices towards inclusive classroom management: a case study of Mthatha district, Eastern Cape, South Africa
- Authors: Bello, Aishatu Haruna
- Date: 2012
- Subjects: Classroom management -- Teachers -- Inclusive education
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18439 , http://hdl.handle.net/11260/d1007198
- Description: This study was carried out in the Mthatha district of the Eastern Cape with the aim of assessing the respondents’ knowledge, attitudes and practices in successful inclusive classroom management at the Foundation Phase in their respective schools. The study adopted a mixed-method approach in which data was collected from secondary and primary sources. Secondary data were collected from literature sources and existing schools’ documents while primary data were collected from the respondents drawn from nine schools in Mthatha area (coded A to I for anonymity) using questionnaire, interview guides and focus group discussions checklists. The nine schools were purposively sampled based on schools with Foundation Phase Programme, while 15 respondents were randomly sampled from among the Foundation Phase teachers in the nine schools for this study. The data collected were subjected to various analytical techniques such as descriptive statistics, frequencies and cross tabulations as well as graphical representations using SPSS to be able to identify and list the main findings from the study. Results from the study based on 75% questionnaire response rate revealed that the respondents had high (79%) self-rating of inclusive education content knowledge despite the fact that they actually had low (over 80%) with poor or fair content knowledge on the knowledge scale. The respondents demonstrated a high degree (over 80%) of positive attitudes and good practices and management approach toward inclusive education despite the fact that they had low inclusive education content knowledge. Over 80% of the respondents revealed that their schools are not ready for inclusive classroom teaching and management due to lack of infrastructure, equipment, training, teacher support and teacher-special assistant. The results from the quantitative data were triangulated and validated by the findings from the qualitative in-depth interviews and focus group discussions which reinforced each other. The findings presented were limited to the respondents in the nine schools used in the study area. This study thus concludes that, a huge gap still exists between the desired level of the state of inclusive education and outcomes as expected from the White Paper 6 2001 in 2012. The study thus recommends the ample need for the departments of education as a matter of urgency, to emphasise the inclusion of inclusive education contents in the training and re-training of educators at the basic education phase. Furthermore, all schools should be provided with adequate infrastructural support in terms of equipment and classroom-friendly environment for learners with special needs.
- Full Text:
- Date Issued: 2012
- Authors: Bello, Aishatu Haruna
- Date: 2012
- Subjects: Classroom management -- Teachers -- Inclusive education
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18439 , http://hdl.handle.net/11260/d1007198
- Description: This study was carried out in the Mthatha district of the Eastern Cape with the aim of assessing the respondents’ knowledge, attitudes and practices in successful inclusive classroom management at the Foundation Phase in their respective schools. The study adopted a mixed-method approach in which data was collected from secondary and primary sources. Secondary data were collected from literature sources and existing schools’ documents while primary data were collected from the respondents drawn from nine schools in Mthatha area (coded A to I for anonymity) using questionnaire, interview guides and focus group discussions checklists. The nine schools were purposively sampled based on schools with Foundation Phase Programme, while 15 respondents were randomly sampled from among the Foundation Phase teachers in the nine schools for this study. The data collected were subjected to various analytical techniques such as descriptive statistics, frequencies and cross tabulations as well as graphical representations using SPSS to be able to identify and list the main findings from the study. Results from the study based on 75% questionnaire response rate revealed that the respondents had high (79%) self-rating of inclusive education content knowledge despite the fact that they actually had low (over 80%) with poor or fair content knowledge on the knowledge scale. The respondents demonstrated a high degree (over 80%) of positive attitudes and good practices and management approach toward inclusive education despite the fact that they had low inclusive education content knowledge. Over 80% of the respondents revealed that their schools are not ready for inclusive classroom teaching and management due to lack of infrastructure, equipment, training, teacher support and teacher-special assistant. The results from the quantitative data were triangulated and validated by the findings from the qualitative in-depth interviews and focus group discussions which reinforced each other. The findings presented were limited to the respondents in the nine schools used in the study area. This study thus concludes that, a huge gap still exists between the desired level of the state of inclusive education and outcomes as expected from the White Paper 6 2001 in 2012. The study thus recommends the ample need for the departments of education as a matter of urgency, to emphasise the inclusion of inclusive education contents in the training and re-training of educators at the basic education phase. Furthermore, all schools should be provided with adequate infrastructural support in terms of equipment and classroom-friendly environment for learners with special needs.
- Full Text:
- Date Issued: 2012
Managing an information security policy architecture : a technical documentation perspective
- Maninjwa, Prosecutor Mvikeli
- Authors: Maninjwa, Prosecutor Mvikeli
- Date: 2012
- Subjects: Computer security -- Management , Computer architecture , Data protection
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9825 , http://hdl.handle.net/10948/d1020757
- Description: Information and the related assets form critical business assets for most organizations. Organizations depend on their information assets to survive and to remain competitive. However, the organization’s information assets are faced with a number of internal and external threats, aimed at compromising the confidentiality, integrity and/or availability (CIA) of information assets. These threats can be of physical, technical, or operational nature. For an organization to successfully conduct its business operations, information assets should always be protected from these threats. The process of protecting information and its related assets, ensuring the CIA thereof, is referred to as information security. To be effective, information security should be viewed as critical to the overall success of the organization, and therefore be included as one of the organization’s Corporate Governance sub-functions, referred to as Information Security Governance. Information Security Governance is the strategic system for directing and controlling the organization’s information security initiatives. Directing is the process whereby management issues directives, giving a strategic direction for information security within an organization. Controlling is the process of ensuring that management directives are being adhered to within an organization. To be effective, Information Security Governance directing and controlling depend on the organization’s Information Security Policy Architecture. An Information Security Policy Architecture is a hierarchical representation of the various information security policies and related documentation that an organization has used. When directing, management directives should be issued in the form of an Information Security Policy Architecture, and controlling should ensure adherence to the Information Security Policy Architecture. However, this study noted that in both literature and organizational practices, Information Security Policy Architectures are not comprehensively addressed and adequately managed. Therefore, this study argues towards a more comprehensive Information Security Policy Architecture, and the proper management thereof.
- Full Text:
- Date Issued: 2012
- Authors: Maninjwa, Prosecutor Mvikeli
- Date: 2012
- Subjects: Computer security -- Management , Computer architecture , Data protection
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9825 , http://hdl.handle.net/10948/d1020757
- Description: Information and the related assets form critical business assets for most organizations. Organizations depend on their information assets to survive and to remain competitive. However, the organization’s information assets are faced with a number of internal and external threats, aimed at compromising the confidentiality, integrity and/or availability (CIA) of information assets. These threats can be of physical, technical, or operational nature. For an organization to successfully conduct its business operations, information assets should always be protected from these threats. The process of protecting information and its related assets, ensuring the CIA thereof, is referred to as information security. To be effective, information security should be viewed as critical to the overall success of the organization, and therefore be included as one of the organization’s Corporate Governance sub-functions, referred to as Information Security Governance. Information Security Governance is the strategic system for directing and controlling the organization’s information security initiatives. Directing is the process whereby management issues directives, giving a strategic direction for information security within an organization. Controlling is the process of ensuring that management directives are being adhered to within an organization. To be effective, Information Security Governance directing and controlling depend on the organization’s Information Security Policy Architecture. An Information Security Policy Architecture is a hierarchical representation of the various information security policies and related documentation that an organization has used. When directing, management directives should be issued in the form of an Information Security Policy Architecture, and controlling should ensure adherence to the Information Security Policy Architecture. However, this study noted that in both literature and organizational practices, Information Security Policy Architectures are not comprehensively addressed and adequately managed. Therefore, this study argues towards a more comprehensive Information Security Policy Architecture, and the proper management thereof.
- Full Text:
- Date Issued: 2012
Haul Music : transnationalism and musical performance in the Saharaui refugee camps of Tindouf, Algeria
- Authors: Gimenez Amoros, Luis
- Date: 2012
- Subjects: Bedouins -- Music -- Research Sahrawi (African people) -- Migrations Social change -- Arab countries Arab countries -- Social life and customs Civilization, Arab
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2637 , http://hdl.handle.net/10962/d1002302
- Description: The thesis presents ethnographic data and musical analysis (in the form of transcriptions) of Haul music which is the music style performed by Bedouin societies in Trab el Bidan region (Mauritania, Western Sahara, northern Mali, southern Algeria and northern Morocco). It is based on field research undertaken in Algeria in 2004-05 in the refugee camps of Tindouf, Algeria, where Saharaui people (a Bedouin society)live in exile. This research is unique and original as Haul has not, until now, been explored in depth by any scholar. My research on Haul reveals that the changes in Saharaui music in the refugee camps of Tindouf reflect changes in the musical traditions of Bedouin societies as whole; changes that can be traced to the revolution which occurred in Western Sahara in 1975, and changes that are a result of the migrations and life in exile that followed. I argue that these changes occurred due to the transnational experiences undergone by Saharaui people in their forced exile (caused by the Moroccan state) from their homeland in Western Sahara to Algeria. Further, I assert that the invocation of memory in Bedouin musical styles is evidence of past musical practices being retained in contemporary Haul performance, although other musical changes are similarly in progress.
- Full Text:
- Date Issued: 2012
- Authors: Gimenez Amoros, Luis
- Date: 2012
- Subjects: Bedouins -- Music -- Research Sahrawi (African people) -- Migrations Social change -- Arab countries Arab countries -- Social life and customs Civilization, Arab
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:2637 , http://hdl.handle.net/10962/d1002302
- Description: The thesis presents ethnographic data and musical analysis (in the form of transcriptions) of Haul music which is the music style performed by Bedouin societies in Trab el Bidan region (Mauritania, Western Sahara, northern Mali, southern Algeria and northern Morocco). It is based on field research undertaken in Algeria in 2004-05 in the refugee camps of Tindouf, Algeria, where Saharaui people (a Bedouin society)live in exile. This research is unique and original as Haul has not, until now, been explored in depth by any scholar. My research on Haul reveals that the changes in Saharaui music in the refugee camps of Tindouf reflect changes in the musical traditions of Bedouin societies as whole; changes that can be traced to the revolution which occurred in Western Sahara in 1975, and changes that are a result of the migrations and life in exile that followed. I argue that these changes occurred due to the transnational experiences undergone by Saharaui people in their forced exile (caused by the Moroccan state) from their homeland in Western Sahara to Algeria. Further, I assert that the invocation of memory in Bedouin musical styles is evidence of past musical practices being retained in contemporary Haul performance, although other musical changes are similarly in progress.
- Full Text:
- Date Issued: 2012
Interest rate pass-through in Cameroon and Nigeria: a comparative analysis
- Authors: Tita, Anthanasius Fomum
- Date: 2012
- Subjects: Interest rates -- Cameroon Interest rates -- Nigeria Interest rates -- Effect of inflation on -- Cameroon Interest rates -- Effect of inflation on -- Nigeria Interest rates -- Econometric models Cointegration Monetary policy -- Cameroon Monetary policy -- Nigeria Banque des états de l'Afrique centrale Banks and banking -- Cameroon Banks and banking -- Nigeria
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1005 , http://hdl.handle.net/10962/d1002740
- Description: One of the most important aspects of monetary policy is an understanding of the transmission process: the mechanism through which the monetary policy actions of the Central Bank impact on aggregate demand and prices by influencing the investment and consumption decisions of households and firms. Thus, commercial banks are regarded as conveyers of monetary policy shocks and are expected to adjust retail interest rates in response to policy shocks one-to-one. In practice, commercial banks adjust their retail rates in response to changes in monetary policy with a lag of several months and this delay is often viewed as an impediment on the ability of the Central Bank to steer the economy. Several reasons, such as credit rationing and adverse selection, switching costs, risk sharing, consumer irrationality, structure of the financial system, menu costs and asymmetric information are some of the causes advanced for commercial banks retail rates being sticky. In spite of the important role of pass-through analysis in the monetary policy transmission process, it has received very little attention in Sub-Saharan Africa, especially in Cameroon and Nigeria, which have implemented a series of reforms. To this end, this study gives a comparative analysis of interest rate pass-through in Nigeria and Cameroon using retail rates (lending and deposit) and a discount rate (policy rate) from January 1990 to December 2010 for Nigeria and from January 1990 to June 2008 for Cameroon. The study examines the magnitude and speed of retail rate adjustments to changes in the Central Bank policy rate as well as examining the possibility of symmetric and asymmetric pass-through in both countries. In addition, the study also investigates whether there is pass-through of monetary policy from one country to the other. The empirical analysis employs four different types of co-integration techniques to test the presence of a long run co-integrating relationship between retail and the policy rates in order to ensure that the relationship detected is robust. Three sets of analyses are carried out in the study. Following Cottarelli and Kourelis (1994), the study employed a co-integration technique, firstly, to analyse pass-through for the entire sample, secondly, to analyse symmetric and asymmetric pass-through using a ten year rolling window analysis in an error correction framework. Finally, the policy rates were swapped around to investigate if there are transmissions of impulses from one country to the other. Overall, evidence from the entire sample and rolling window analysis suggests that monetary policy in Cameroon is less effective. This is perhaps one of the reasons why the Banque Des Etats De L’Afrique Centrale (BEAC) is unable to sterilise the excess liquidity of the banking sector in Cameroon. The long run pass-through of 0.72 and 0.71 for the entire sample, and the average long run pass-through for the rolling window of 0.78 and 0.76 for the lending and deposit rates, suggest that monetary policy is highly effective in Nigeria compared to Cameroon. The empirical evidence confirmed asymmetric adjustment in six rolling windows in the lending rate in Nigeria. Three rolling windows indicated that the direction of rigidity is downward, supporting Scholnick’s (1996) collusive pricing arrangement between banks, and the other three suggested that the lending rate is rigid in the upward direction, corroborating Scholnick’s (1996) customer reaction hypothesis. The deposit rate in Cameroon was also found to adjust asymmetrically and the direction of rigidity is downward, supporting Hannan and Berger’s (1991) customer reaction hypothesis. The investigation of impulse transmission between the two countries revealed that only the policy rate in Nigeria exerts some influence on the deposit rate in Cameroon. Policy recommendations are also discussed.
- Full Text:
- Date Issued: 2012
- Authors: Tita, Anthanasius Fomum
- Date: 2012
- Subjects: Interest rates -- Cameroon Interest rates -- Nigeria Interest rates -- Effect of inflation on -- Cameroon Interest rates -- Effect of inflation on -- Nigeria Interest rates -- Econometric models Cointegration Monetary policy -- Cameroon Monetary policy -- Nigeria Banque des états de l'Afrique centrale Banks and banking -- Cameroon Banks and banking -- Nigeria
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:1005 , http://hdl.handle.net/10962/d1002740
- Description: One of the most important aspects of monetary policy is an understanding of the transmission process: the mechanism through which the monetary policy actions of the Central Bank impact on aggregate demand and prices by influencing the investment and consumption decisions of households and firms. Thus, commercial banks are regarded as conveyers of monetary policy shocks and are expected to adjust retail interest rates in response to policy shocks one-to-one. In practice, commercial banks adjust their retail rates in response to changes in monetary policy with a lag of several months and this delay is often viewed as an impediment on the ability of the Central Bank to steer the economy. Several reasons, such as credit rationing and adverse selection, switching costs, risk sharing, consumer irrationality, structure of the financial system, menu costs and asymmetric information are some of the causes advanced for commercial banks retail rates being sticky. In spite of the important role of pass-through analysis in the monetary policy transmission process, it has received very little attention in Sub-Saharan Africa, especially in Cameroon and Nigeria, which have implemented a series of reforms. To this end, this study gives a comparative analysis of interest rate pass-through in Nigeria and Cameroon using retail rates (lending and deposit) and a discount rate (policy rate) from January 1990 to December 2010 for Nigeria and from January 1990 to June 2008 for Cameroon. The study examines the magnitude and speed of retail rate adjustments to changes in the Central Bank policy rate as well as examining the possibility of symmetric and asymmetric pass-through in both countries. In addition, the study also investigates whether there is pass-through of monetary policy from one country to the other. The empirical analysis employs four different types of co-integration techniques to test the presence of a long run co-integrating relationship between retail and the policy rates in order to ensure that the relationship detected is robust. Three sets of analyses are carried out in the study. Following Cottarelli and Kourelis (1994), the study employed a co-integration technique, firstly, to analyse pass-through for the entire sample, secondly, to analyse symmetric and asymmetric pass-through using a ten year rolling window analysis in an error correction framework. Finally, the policy rates were swapped around to investigate if there are transmissions of impulses from one country to the other. Overall, evidence from the entire sample and rolling window analysis suggests that monetary policy in Cameroon is less effective. This is perhaps one of the reasons why the Banque Des Etats De L’Afrique Centrale (BEAC) is unable to sterilise the excess liquidity of the banking sector in Cameroon. The long run pass-through of 0.72 and 0.71 for the entire sample, and the average long run pass-through for the rolling window of 0.78 and 0.76 for the lending and deposit rates, suggest that monetary policy is highly effective in Nigeria compared to Cameroon. The empirical evidence confirmed asymmetric adjustment in six rolling windows in the lending rate in Nigeria. Three rolling windows indicated that the direction of rigidity is downward, supporting Scholnick’s (1996) collusive pricing arrangement between banks, and the other three suggested that the lending rate is rigid in the upward direction, corroborating Scholnick’s (1996) customer reaction hypothesis. The deposit rate in Cameroon was also found to adjust asymmetrically and the direction of rigidity is downward, supporting Hannan and Berger’s (1991) customer reaction hypothesis. The investigation of impulse transmission between the two countries revealed that only the policy rate in Nigeria exerts some influence on the deposit rate in Cameroon. Policy recommendations are also discussed.
- Full Text:
- Date Issued: 2012
Detecting impacts of invasive non-native sharptooth catfish, Clarias gariepinus, within invaded and non-invaded rivers.
- Kadye, Wilbert T, Booth, Anthony J
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124100 , vital:35539 , https://doi.10.1007/s10531-012-0291-5
- Description: In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple Before–After Control–Impact (MBACI) experimental design was used to examine macroinvertebrate communities within two rivers: one with catfish and another one without catfish. Within the invaded river, macroinvertebrates showed little response to catfish presence, whereas predator exclusion appeared to benefit community structure. This suggests that the macroinvertebrate community within the invaded river was adapted to predation impact because of the dominance of resilient taxa, such as Hirudinea, Oligochaeta and Chironomidae that were abundant in the Impact treatment relative to the Control treatment. High macroinvertebrate diversity and richness that was observed in the Control treatment, which excluded the predator, relative to the Impact treatment suggests predator avoidance behaviour within the invaded river. By comparison, within the uninvaded river, catfish introduction into the Impact treatment plots indicated negative effects on macroinvertebrate community that was reflected by decrease in diversity, richness and biomass. A community level impact was also reflected in the multivariate analysis that indicated more variation in macroinvertebrate composition within the Impact treatment relative to the Control in the uninvaded river. Catfish impact within the uninvaded river suggests the dominance of vulnerable taxa, such as odonates that were less abundant in the Impact treatment plots after catfish introduction. From a disturbance perspective, this study revealed different macroinvertebrate responses to catfish impact, and suggests that within invaded habitats, macroinvertebrates were less responsive to catfish presence, whereas catfish introduction within uninvaded habitats demonstrated invasion impact that was shown by a decrease in the abundance of vulnerable taxa. The occurrence of non-native sharptooth catfish within many Eastern Cape rivers is a concern because of its predation impact and potential to influence trophic interrelationships, and efforts should be taken to protect uninvaded rivers, and, where possible, eradicate the invader.
- Full Text:
- Date Issued: 2012
- Authors: Kadye, Wilbert T , Booth, Anthony J
- Date: 2012
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/124100 , vital:35539 , https://doi.10.1007/s10531-012-0291-5
- Description: In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple Before–After Control–Impact (MBACI) experimental design was used to examine macroinvertebrate communities within two rivers: one with catfish and another one without catfish. Within the invaded river, macroinvertebrates showed little response to catfish presence, whereas predator exclusion appeared to benefit community structure. This suggests that the macroinvertebrate community within the invaded river was adapted to predation impact because of the dominance of resilient taxa, such as Hirudinea, Oligochaeta and Chironomidae that were abundant in the Impact treatment relative to the Control treatment. High macroinvertebrate diversity and richness that was observed in the Control treatment, which excluded the predator, relative to the Impact treatment suggests predator avoidance behaviour within the invaded river. By comparison, within the uninvaded river, catfish introduction into the Impact treatment plots indicated negative effects on macroinvertebrate community that was reflected by decrease in diversity, richness and biomass. A community level impact was also reflected in the multivariate analysis that indicated more variation in macroinvertebrate composition within the Impact treatment relative to the Control in the uninvaded river. Catfish impact within the uninvaded river suggests the dominance of vulnerable taxa, such as odonates that were less abundant in the Impact treatment plots after catfish introduction. From a disturbance perspective, this study revealed different macroinvertebrate responses to catfish impact, and suggests that within invaded habitats, macroinvertebrates were less responsive to catfish presence, whereas catfish introduction within uninvaded habitats demonstrated invasion impact that was shown by a decrease in the abundance of vulnerable taxa. The occurrence of non-native sharptooth catfish within many Eastern Cape rivers is a concern because of its predation impact and potential to influence trophic interrelationships, and efforts should be taken to protect uninvaded rivers, and, where possible, eradicate the invader.
- Full Text:
- Date Issued: 2012
Liquidity risk management by Zimbabwean commercial banks
- Authors: Chikoko, Laurine
- Date: 2012
- Subjects: Liquidity (Economics) , Banks and banking -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:9027 , http://hdl.handle.net/10948/d1020344
- Description: Macroeconomic and financial market developments in Zimbabwe since 2000 have led to an increase in many banks‟ overall exposure to liquidity risk. The thesis highlights the importance of understanding and building comprehensive liquidity frameworks as defenses against liquidity stress. This study explores liquidity and liquidity risk management practices as well as the linkages and factors that affected different types of liquidity in the Zimbabwean banking sector during the Zimbabwean dollar and multiple currency eras. The research sought to present a comprehensive analysis of Zimbabwean commercial banks‟ liquidity risk management in challenging operating environments. Two periods were selected: January 2000 to December 2008 (the Zimbabwean dollar era) and March 2009 to June 2011 (the multiple currency era). Explanatory and survey research designs were used. The study applied econometric modeling using panel regression analysis to identify the major determinants of liquidity risk for 15 commercial banks in Zimbabwe. The financing gap ratio was used as the proxy for liquidity risk. The first investigation was on liquidity risk determinants in the Zimbabwean dollar era. The econometric investigations revealed that an increase in capital adequacy reduced liquidity risk and that there was a positive relationship between size and bank illiquidity. Liquidity risk was also explained by spreads. Inflation was positively related to liquidity risk and was a significant explanatory variable. Non-performing loans were not significant in explaining commercial banks‟ illiquidity, which is contrary to expectations. The second investigation was on commercial banks‟ liquidity risk determinants in the multiple currency era by using panel monthly data. The results showed that capital adequacy had a significant negative relationship with liquidity risk. The size of the bank was significant and positively related to bank illiquidity. Unlike in the Zimbabwean dollar era, spreads were negatively related to bank liquidity risk. Again, non-performing loans were a significant explanatory variable. The reserve requirements ratio and inflation also influenced bank illiquidity in the multiple currency regime. In both investigations, robustness tests for the main findings were done with an alternative dependent variable to the financing gap ratio. To complement the econometric analysis, a survey was conducted using questionnaires and interviews for the same 15 commercial banks. Empirical analysis in this research showed that during the 2000-2008 era; (i) no liquidity risk management guidelines were issued by the Reserve Bank of Zimbabwe until 2007. Banks relied on internal efforts in managing liquidity risk (ii) Liquidity was managed daily by treasury (iii) The operating environment was challenging with high inflation rates, which led to high demand for cash withdrawals by depositors (iv) Locally owned banks were more exposed to liquidity risk as compared to the foreign owned banks (v) Major sources of funds were new deposits, retention of maturities, shareholders, interbank borrowings, offshore lines of credit and also banks relied on the Reserve Bank of Zimbabwe as the lender of last resort (vi) Financial markets were active and banks offered a wide range of products (vii) To manage liquidity from depositors, banks relied on cash reserves, calculating and analysing the withdrawal patterns. When faced with cash shortages, banks relied on the daily limits set by the Reserve Bank of Zimbabwe (viii) Banks were lending but when the challenges deepened, they lent less in advances and increased investment in government securities. (ix) Inflation had major effects on liquidity risk management as it affected demand deposit tenors, fixed term products, corporate sector deposit mobilisation, cost of funds and investment portfolios (x) The regulatory environment was not favourable with RBZ policy measures designed to arrest inflation having negative repercussions on banks` liquidity management (xi) Banks had no liquidity crisis management frameworks. During the multiple currency exchange rate system (i) Commercial banks had problems in sourcing funds. They were mainly funded by transitory deposits with little coming in from treasury activities, interbank activities and offshore lines of credit. There was no lender of last resort function by the Reserve Bank of Zimbabwe. (ii) Some banks were still struggling to raise the minimum capital requirements (iii) Commercial banks offered narrow product ranges to clients (iv) To manage liquidity demand from clients, banks relied on the cash reserve ratio, and calculated the patterns of withdrawal, while some banks communicated with corporate clients on withdrawal schedules. (v) Zimbabwe commercial banks resumed the lending activity after dollarisation. Locally owned banks were aggressive, while foreign owned banks took a passive stance. There were problems with non-performing loans, especially from corporate clients, which exposed many banks to liquidity risk. (vi) Liquidity risk management in Zimbabwe was still guided by the Reserve Bank of Zimbabwe Risk Management Guideline BSD-04, 2007. All banks had liquidity risk management policies and procedure manuals but some banks were not adhering to them. Banks also had liquidity risk limits in place but some violated them. Furthermore, some banks were not conducting stress tests. Although all banks had contingency plans in place, none were testing them. Specifically, the research study highlighted the potential sources of liquidity risk in the Zimbabwean dollar and multiple currency periods. Based on the results, the study recommends survival strategies for banks in managing liquidity risk in such environments. It proposes a comprehensive liquidity management framework that clearly identifies, measures and control liquidity risk consistent with bank-specific and the country‟s macroeconomic developments. The envisaged framework would assist banks in dealing with illiquidity in a manner that would be less disruptive and that could render any future crisis less painful. Of importance is the recommendation that the central bank might not need to be too strict or too relaxed, but be moderate in ensuring an enabling regulatory environment. This would help banks to manage liquidity risk and at the same time protect depositors in any challenging operating environment. In both the studied time periods, there were transitory deposits. Generally there is need to inculcate a savings culture in Zimbabwe.
- Full Text:
- Date Issued: 2012
- Authors: Chikoko, Laurine
- Date: 2012
- Subjects: Liquidity (Economics) , Banks and banking -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:9027 , http://hdl.handle.net/10948/d1020344
- Description: Macroeconomic and financial market developments in Zimbabwe since 2000 have led to an increase in many banks‟ overall exposure to liquidity risk. The thesis highlights the importance of understanding and building comprehensive liquidity frameworks as defenses against liquidity stress. This study explores liquidity and liquidity risk management practices as well as the linkages and factors that affected different types of liquidity in the Zimbabwean banking sector during the Zimbabwean dollar and multiple currency eras. The research sought to present a comprehensive analysis of Zimbabwean commercial banks‟ liquidity risk management in challenging operating environments. Two periods were selected: January 2000 to December 2008 (the Zimbabwean dollar era) and March 2009 to June 2011 (the multiple currency era). Explanatory and survey research designs were used. The study applied econometric modeling using panel regression analysis to identify the major determinants of liquidity risk for 15 commercial banks in Zimbabwe. The financing gap ratio was used as the proxy for liquidity risk. The first investigation was on liquidity risk determinants in the Zimbabwean dollar era. The econometric investigations revealed that an increase in capital adequacy reduced liquidity risk and that there was a positive relationship between size and bank illiquidity. Liquidity risk was also explained by spreads. Inflation was positively related to liquidity risk and was a significant explanatory variable. Non-performing loans were not significant in explaining commercial banks‟ illiquidity, which is contrary to expectations. The second investigation was on commercial banks‟ liquidity risk determinants in the multiple currency era by using panel monthly data. The results showed that capital adequacy had a significant negative relationship with liquidity risk. The size of the bank was significant and positively related to bank illiquidity. Unlike in the Zimbabwean dollar era, spreads were negatively related to bank liquidity risk. Again, non-performing loans were a significant explanatory variable. The reserve requirements ratio and inflation also influenced bank illiquidity in the multiple currency regime. In both investigations, robustness tests for the main findings were done with an alternative dependent variable to the financing gap ratio. To complement the econometric analysis, a survey was conducted using questionnaires and interviews for the same 15 commercial banks. Empirical analysis in this research showed that during the 2000-2008 era; (i) no liquidity risk management guidelines were issued by the Reserve Bank of Zimbabwe until 2007. Banks relied on internal efforts in managing liquidity risk (ii) Liquidity was managed daily by treasury (iii) The operating environment was challenging with high inflation rates, which led to high demand for cash withdrawals by depositors (iv) Locally owned banks were more exposed to liquidity risk as compared to the foreign owned banks (v) Major sources of funds were new deposits, retention of maturities, shareholders, interbank borrowings, offshore lines of credit and also banks relied on the Reserve Bank of Zimbabwe as the lender of last resort (vi) Financial markets were active and banks offered a wide range of products (vii) To manage liquidity from depositors, banks relied on cash reserves, calculating and analysing the withdrawal patterns. When faced with cash shortages, banks relied on the daily limits set by the Reserve Bank of Zimbabwe (viii) Banks were lending but when the challenges deepened, they lent less in advances and increased investment in government securities. (ix) Inflation had major effects on liquidity risk management as it affected demand deposit tenors, fixed term products, corporate sector deposit mobilisation, cost of funds and investment portfolios (x) The regulatory environment was not favourable with RBZ policy measures designed to arrest inflation having negative repercussions on banks` liquidity management (xi) Banks had no liquidity crisis management frameworks. During the multiple currency exchange rate system (i) Commercial banks had problems in sourcing funds. They were mainly funded by transitory deposits with little coming in from treasury activities, interbank activities and offshore lines of credit. There was no lender of last resort function by the Reserve Bank of Zimbabwe. (ii) Some banks were still struggling to raise the minimum capital requirements (iii) Commercial banks offered narrow product ranges to clients (iv) To manage liquidity demand from clients, banks relied on the cash reserve ratio, and calculated the patterns of withdrawal, while some banks communicated with corporate clients on withdrawal schedules. (v) Zimbabwe commercial banks resumed the lending activity after dollarisation. Locally owned banks were aggressive, while foreign owned banks took a passive stance. There were problems with non-performing loans, especially from corporate clients, which exposed many banks to liquidity risk. (vi) Liquidity risk management in Zimbabwe was still guided by the Reserve Bank of Zimbabwe Risk Management Guideline BSD-04, 2007. All banks had liquidity risk management policies and procedure manuals but some banks were not adhering to them. Banks also had liquidity risk limits in place but some violated them. Furthermore, some banks were not conducting stress tests. Although all banks had contingency plans in place, none were testing them. Specifically, the research study highlighted the potential sources of liquidity risk in the Zimbabwean dollar and multiple currency periods. Based on the results, the study recommends survival strategies for banks in managing liquidity risk in such environments. It proposes a comprehensive liquidity management framework that clearly identifies, measures and control liquidity risk consistent with bank-specific and the country‟s macroeconomic developments. The envisaged framework would assist banks in dealing with illiquidity in a manner that would be less disruptive and that could render any future crisis less painful. Of importance is the recommendation that the central bank might not need to be too strict or too relaxed, but be moderate in ensuring an enabling regulatory environment. This would help banks to manage liquidity risk and at the same time protect depositors in any challenging operating environment. In both the studied time periods, there were transitory deposits. Generally there is need to inculcate a savings culture in Zimbabwe.
- Full Text:
- Date Issued: 2012
An investigation of strategies used by school principals in promoting professional development among teaching staff in the Keiskammahoek area
- Authors: Kebeni, Mputumi
- Date: 2012
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16217 , http://hdl.handle.net/10353/d1018603
- Description: The fusion of the different Departments of Education after 1994 resulted in many changes in the education system of South Africa, which created confusion and uncertainty among educators. Among the changes was the introduction of the National Curriculum Statement and Outcomes-Based Education that was intended to transform teaching and learning in schools. To prepare educators for the myriad of changes, short courses were conducted via the cascade model, but these proved largely ineffective and educators have been crying out for proper Professional Development programmes to better prepare them for their crucial roles in the new South Africa. Amongst the many challenges in rural areas, multi-grade and multi-phase teaching is prevalent. Most educators were not adequately prepared for these during teacher training. The poor quality of training and lack of professional development have resulted in feelings of frustration and inadequacy among educators. To ameliorate the situation, the Department of Education instituted the Integrated Quality Management System (IQMS), aimed at improving the quality of learning and teaching by empowering, motivating and training educators. However, professional development has remained elusive as the IQMS is not properly used since it has been characterised by political interference, and seems almost exclusively focused on salary progression. At the end of the day, it is often the overworked and over-burdened school principal who is attempting to provide professional development for staff, with little or no help from outside sources. Very little research that has been undertaken into what it is that rural school principals actually do to develop staff. The researcher has attempted to understand how principals undertake the professional development of educators, given that many are in remote and resource-poor areas, which makes development very difficult. Added to this is the heavy workload and burden of classroom teaching which many of the principals face, especially those in remote areas, where smaller schools are the norm. The researcher explored different strategies which school principals can use for the professional development of their staff before going to the field to see what it is that principals are actually doing. School principals are strategically situated to play a significant role in improving the quality of teaching and learning, as the success and failure of their schools rest on their shoulders. Every study is located within a paradigm. The paradigm used in this study is the interpretivist one, as it allowed the researcher to investigate the meanings and the interpretation of the social actors in a particular situation. Hermeneutic theory within a qualitative research approach was used, as its main concern is an understanding of the way in which individuals construct, modify and interpret the world in which they find themselves. The research design used was semi-structured interviews, chosen to elicit information from the participants about professional development in their schools. Interview questions were prepared that emanated from the main research question. Through fieldwork, the researcher developed an understanding of the challenges that face the principals, and of the strategies they use to promote professional growth and development. It was discovered that principals in smaller rural schools in Keiskammahoek make extensive use of delegation as a developmental tool, but that while there are other attempts to develop staff, there seems to be very little comprehensive planning or execution of professional development. Recommendations made are that school principals should use workshops regularly, encourage educators to plan together and monitor such planning, delegate duties, encourage group and team work among the teachers, implement the IQMS and encourage mentoring and coaching for development purposes. School principals should jointly form forums and clusters that are aimed at professional growth and development. Principals should also take initiative in professional development, even if they are faced with difficult situations and conditions. The Department of Education should invest in education by ensuring that all educators, no matter where they teach, should enjoy continuous professional development to improve the quality of learning and teaching in schools.
- Full Text:
- Date Issued: 2012
- Authors: Kebeni, Mputumi
- Date: 2012
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16217 , http://hdl.handle.net/10353/d1018603
- Description: The fusion of the different Departments of Education after 1994 resulted in many changes in the education system of South Africa, which created confusion and uncertainty among educators. Among the changes was the introduction of the National Curriculum Statement and Outcomes-Based Education that was intended to transform teaching and learning in schools. To prepare educators for the myriad of changes, short courses were conducted via the cascade model, but these proved largely ineffective and educators have been crying out for proper Professional Development programmes to better prepare them for their crucial roles in the new South Africa. Amongst the many challenges in rural areas, multi-grade and multi-phase teaching is prevalent. Most educators were not adequately prepared for these during teacher training. The poor quality of training and lack of professional development have resulted in feelings of frustration and inadequacy among educators. To ameliorate the situation, the Department of Education instituted the Integrated Quality Management System (IQMS), aimed at improving the quality of learning and teaching by empowering, motivating and training educators. However, professional development has remained elusive as the IQMS is not properly used since it has been characterised by political interference, and seems almost exclusively focused on salary progression. At the end of the day, it is often the overworked and over-burdened school principal who is attempting to provide professional development for staff, with little or no help from outside sources. Very little research that has been undertaken into what it is that rural school principals actually do to develop staff. The researcher has attempted to understand how principals undertake the professional development of educators, given that many are in remote and resource-poor areas, which makes development very difficult. Added to this is the heavy workload and burden of classroom teaching which many of the principals face, especially those in remote areas, where smaller schools are the norm. The researcher explored different strategies which school principals can use for the professional development of their staff before going to the field to see what it is that principals are actually doing. School principals are strategically situated to play a significant role in improving the quality of teaching and learning, as the success and failure of their schools rest on their shoulders. Every study is located within a paradigm. The paradigm used in this study is the interpretivist one, as it allowed the researcher to investigate the meanings and the interpretation of the social actors in a particular situation. Hermeneutic theory within a qualitative research approach was used, as its main concern is an understanding of the way in which individuals construct, modify and interpret the world in which they find themselves. The research design used was semi-structured interviews, chosen to elicit information from the participants about professional development in their schools. Interview questions were prepared that emanated from the main research question. Through fieldwork, the researcher developed an understanding of the challenges that face the principals, and of the strategies they use to promote professional growth and development. It was discovered that principals in smaller rural schools in Keiskammahoek make extensive use of delegation as a developmental tool, but that while there are other attempts to develop staff, there seems to be very little comprehensive planning or execution of professional development. Recommendations made are that school principals should use workshops regularly, encourage educators to plan together and monitor such planning, delegate duties, encourage group and team work among the teachers, implement the IQMS and encourage mentoring and coaching for development purposes. School principals should jointly form forums and clusters that are aimed at professional growth and development. Principals should also take initiative in professional development, even if they are faced with difficult situations and conditions. The Department of Education should invest in education by ensuring that all educators, no matter where they teach, should enjoy continuous professional development to improve the quality of learning and teaching in schools.
- Full Text:
- Date Issued: 2012
Synthesis of phthalocyanine conjugates with gold nanoparticles and liposomes for photodynamic therapy
- Nombona, Nolwazi, Maduray, Kaminee, Antunes, Edith M, Karsten, Aletta, Nyokong, Tebello
- Authors: Nombona, Nolwazi , Maduray, Kaminee , Antunes, Edith M , Karsten, Aletta , Nyokong, Tebello
- Date: 2012
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/245798 , vital:51406 , xlink:href="https://doi.org/10.1016/j.jphotobiol.2011.11.007"
- Description: The efficiency of [2,9,17,23-tetrakis-(1,6-hexanedithiol)phthalocyaninato]zinc(II) as a photodynamic therapy (PDT) agent was investigated. This compound belongs to the second generation of photosensitizers currently tested for the cellular photo-damage of cancer cells. The production of reactive oxygen species (ROS) and phototoxicity of the photosensitizer were assessed. Healthy fibroblast cells and breast cancer (MCF-7) cells were treated with either free phthalocyanine or phthalocyanine bound to either gold nanoparticles or encapsulated in liposomes. Cell viability studies showed the optimum phototoxic effect on non-malignant cells to be 4.5 J cm−2. The PDT effect of the liposome bound phthalocyanine showed extensive damage of the breast cancer cells. Gold nanoparticles only showed a modest improvement in PDT activity.
- Full Text:
- Date Issued: 2012
- Authors: Nombona, Nolwazi , Maduray, Kaminee , Antunes, Edith M , Karsten, Aletta , Nyokong, Tebello
- Date: 2012
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/245798 , vital:51406 , xlink:href="https://doi.org/10.1016/j.jphotobiol.2011.11.007"
- Description: The efficiency of [2,9,17,23-tetrakis-(1,6-hexanedithiol)phthalocyaninato]zinc(II) as a photodynamic therapy (PDT) agent was investigated. This compound belongs to the second generation of photosensitizers currently tested for the cellular photo-damage of cancer cells. The production of reactive oxygen species (ROS) and phototoxicity of the photosensitizer were assessed. Healthy fibroblast cells and breast cancer (MCF-7) cells were treated with either free phthalocyanine or phthalocyanine bound to either gold nanoparticles or encapsulated in liposomes. Cell viability studies showed the optimum phototoxic effect on non-malignant cells to be 4.5 J cm−2. The PDT effect of the liposome bound phthalocyanine showed extensive damage of the breast cancer cells. Gold nanoparticles only showed a modest improvement in PDT activity.
- Full Text:
- Date Issued: 2012
A critical study of voice teaching method, with specific reference to solo singing, choral singing and vocal health for the teenage singer
- Authors: Olivier, Madelie Charlotte
- Date: 2012
- Subjects: Singing -- Instruction and study , Voice culture -- Exercises , Singing -- Methods
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:8523 , http://hdl.handle.net/10948/d1019926
- Description: This dissertation presents a critical study of voice teaching method as this pertains to the high school learner studying voice within the South African educational environment, with learning outcomes determined for subject music within the GET (General Education and Training) and FET (Further Education and Training) bands of the Department of Basic Education at each school grade level, as well as by external examining bodies such as Unisa (University of South Africa), Trinity Guildhall and ABRSM (Amalgamated Board of the Royal Schools of Music). Emphasis is placed on the methodological principles applicable in the case of the Western classical music solo vocal repertoire, but reference is also made to the applicability of this method in other vocal genres and, in particular, in the case of choral music participation. Special attention is given to the subject of the vocal health of the developing teenage voice, which includes an overview of vocal disorders and suggestions for rehabilitation and remedial programmes where necessary. Triangulation of research results is achieved in this study through inclusion of: - A thorough survey of selected pertinent bibliographic sources - Description of and engagement with the researcher’s own numerous phenomenological encounters in this field - Interviews conducted in Port Elizabeth with Jill Nock, voice teacher, on the subject of voice teaching method, and with John Black, Ear, Nose and Throat Specialist, on the subject of vocal health. The researcher concludes that there is a need for continued education and training of music educators in the South African high school environment, many of whom are not trained voice specialists, in order to cater for the growing number of high school music learners who choose to specialise in voice. Although educator networking can go a long way towards creating an informal support system to address this need, it is ultimately the responsibility of the Department of Basic Education to address this in a formal and all-encompassing fashion.
- Full Text:
- Date Issued: 2012
- Authors: Olivier, Madelie Charlotte
- Date: 2012
- Subjects: Singing -- Instruction and study , Voice culture -- Exercises , Singing -- Methods
- Language: English
- Type: Thesis , Masters , MMus
- Identifier: vital:8523 , http://hdl.handle.net/10948/d1019926
- Description: This dissertation presents a critical study of voice teaching method as this pertains to the high school learner studying voice within the South African educational environment, with learning outcomes determined for subject music within the GET (General Education and Training) and FET (Further Education and Training) bands of the Department of Basic Education at each school grade level, as well as by external examining bodies such as Unisa (University of South Africa), Trinity Guildhall and ABRSM (Amalgamated Board of the Royal Schools of Music). Emphasis is placed on the methodological principles applicable in the case of the Western classical music solo vocal repertoire, but reference is also made to the applicability of this method in other vocal genres and, in particular, in the case of choral music participation. Special attention is given to the subject of the vocal health of the developing teenage voice, which includes an overview of vocal disorders and suggestions for rehabilitation and remedial programmes where necessary. Triangulation of research results is achieved in this study through inclusion of: - A thorough survey of selected pertinent bibliographic sources - Description of and engagement with the researcher’s own numerous phenomenological encounters in this field - Interviews conducted in Port Elizabeth with Jill Nock, voice teacher, on the subject of voice teaching method, and with John Black, Ear, Nose and Throat Specialist, on the subject of vocal health. The researcher concludes that there is a need for continued education and training of music educators in the South African high school environment, many of whom are not trained voice specialists, in order to cater for the growing number of high school music learners who choose to specialise in voice. Although educator networking can go a long way towards creating an informal support system to address this need, it is ultimately the responsibility of the Department of Basic Education to address this in a formal and all-encompassing fashion.
- Full Text:
- Date Issued: 2012
Rights discourses in relation to people with intellectual disability: towards an ethics of relations, critique and care
- Mckenzie, Judith, Macleod, Catriona I
- Authors: Mckenzie, Judith , Macleod, Catriona I
- Date: 2012
- Language: English
- Type: Article
- Identifier: vital:6282 , http://hdl.handle.net/10962/d1014123 , http://dx.doi.org/10.1080/09687599.2012.631795
- Description: In this paper we argue that human rights approaches for intellectually disabled people have failed to recognise the complexity of rights claims made by and on behalf of this group. Drawing on a research project into discourses of education for intellectually disabled people in the Eastern Cape, South Africa we discern three rights discourses; namely, rights to full participation, rights to special services and rights to protection. These draw off a social model, a medical model and a protective model, respectively. We note that these discourses may be set up in contestation with each other. However, we argue that they can be seen as complementary if viewed within an ethics of care that enables participation. Within this conceptualisation, participation is viewed within relations of care but is subject to a critique that examines the role of context and disciplinary power in constructing dependency.
- Full Text:
- Date Issued: 2012
- Authors: Mckenzie, Judith , Macleod, Catriona I
- Date: 2012
- Language: English
- Type: Article
- Identifier: vital:6282 , http://hdl.handle.net/10962/d1014123 , http://dx.doi.org/10.1080/09687599.2012.631795
- Description: In this paper we argue that human rights approaches for intellectually disabled people have failed to recognise the complexity of rights claims made by and on behalf of this group. Drawing on a research project into discourses of education for intellectually disabled people in the Eastern Cape, South Africa we discern three rights discourses; namely, rights to full participation, rights to special services and rights to protection. These draw off a social model, a medical model and a protective model, respectively. We note that these discourses may be set up in contestation with each other. However, we argue that they can be seen as complementary if viewed within an ethics of care that enables participation. Within this conceptualisation, participation is viewed within relations of care but is subject to a critique that examines the role of context and disciplinary power in constructing dependency.
- Full Text:
- Date Issued: 2012
Challenges faced by high school managers in dealing with pregnant learners in their schools: a case study of selected high schools in the Idutywa district, Eastern Cape Region
- Authors: Tyumre, Nocawe
- Date: 2012
- Subjects: School principals -- Pregnant teenagers -- Education (Secondary) , South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18448 , http://hdl.handle.net/11260/d1007300
- Description: The purpose of the study was to investigate the challenges faced by high school managers in dealing with pregnant learners in their schools and also ways of dealing with such challenges in selected Senior Secondary Schools in the Idutywa Education District (IED) in the Eastern Cape Province. The study mainly focused on rural schools. Qualitative research method was used and a Case Study design was used to conduct the study. The sample constituted of 16 high School Management Team (SMT) members from the four chosen high schools. An interview schedule designed by the researcher was used to gather data. The collected data were analysed using codes, segments, categories and themes. The researcher interpreted the data and the findings of the study showed that pregnancy changed the behaviour of female learners as a result, School Management Teams (SMT) found it difficult to deal with pregnant learner behaviours in terms of punishing them or expelling them due to South African Schools Act (1996). The study showed that, the School Management Teams in the four selected high schools felt that there should be parental involvement in schools when dealing with learner behaviours. The study showed that pregnant learners dropout of school before they completed their matriculation and they returned anytime after giving birth and SMT had no choice but to accept them even if they returned in the middle of the year. The study further showed that teachers had to assist pregnant learners by organizing catch up programmes so that they produce good results at the end of the year. According to the findings of the study it was clear that pregnancy really affected school policies in terms of learner discipline, learner absenteeism, school dropout and learner overall results. The researcher recommended that, the Department of Education should formulate a policy on pregnant learners that will not allow pregnant learners to attend school while being pregnant in order to assist School Management Teams in schools. The formulated policy should allow School Management Teams to expel pregnant learners in school.
- Full Text:
- Date Issued: 2012
- Authors: Tyumre, Nocawe
- Date: 2012
- Subjects: School principals -- Pregnant teenagers -- Education (Secondary) , South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:18448 , http://hdl.handle.net/11260/d1007300
- Description: The purpose of the study was to investigate the challenges faced by high school managers in dealing with pregnant learners in their schools and also ways of dealing with such challenges in selected Senior Secondary Schools in the Idutywa Education District (IED) in the Eastern Cape Province. The study mainly focused on rural schools. Qualitative research method was used and a Case Study design was used to conduct the study. The sample constituted of 16 high School Management Team (SMT) members from the four chosen high schools. An interview schedule designed by the researcher was used to gather data. The collected data were analysed using codes, segments, categories and themes. The researcher interpreted the data and the findings of the study showed that pregnancy changed the behaviour of female learners as a result, School Management Teams (SMT) found it difficult to deal with pregnant learner behaviours in terms of punishing them or expelling them due to South African Schools Act (1996). The study showed that, the School Management Teams in the four selected high schools felt that there should be parental involvement in schools when dealing with learner behaviours. The study showed that pregnant learners dropout of school before they completed their matriculation and they returned anytime after giving birth and SMT had no choice but to accept them even if they returned in the middle of the year. The study further showed that teachers had to assist pregnant learners by organizing catch up programmes so that they produce good results at the end of the year. According to the findings of the study it was clear that pregnancy really affected school policies in terms of learner discipline, learner absenteeism, school dropout and learner overall results. The researcher recommended that, the Department of Education should formulate a policy on pregnant learners that will not allow pregnant learners to attend school while being pregnant in order to assist School Management Teams in schools. The formulated policy should allow School Management Teams to expel pregnant learners in school.
- Full Text:
- Date Issued: 2012
Successful implementation of succession planning: second generation
- Authors: Fox, Roderick Charles
- Date: 2012
- Subjects: Family-owned business enterprises -- Succession , Family corporations -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8771 , http://hdl.handle.net/10948/d1012445 , Family-owned business enterprises -- Succession , Family corporations -- Management
- Description: Family businesses are prevalent in South Africa and throughout the world. Succession is one of the largest challenges facing family businesses. It has been estimated that only one third of family businesses survive to the second generation. This study attempts to determine what the main features are to promote successful family business succession and continuity. The family chosen for this research is the Venter family. The research has scaled the various influencing variables from the literature review into the following focus areas: relationships, conflict, vision, effective succession characteristics and continuity. The findings reflect many instances found in the literature, some are: individuals can manage themselves and have relationships with others; have the ability to resolve conflicts; have mutual support and trust; there is respect between the founder and successor; the business vision is clear; communication is open and clear and decisions are based on expertise and knowledge. Many other aspects are highlighted in the research that follows. In addition, the study attempts to identify the generational effects, the major characteristics of the family owned succession process and the views of the predecessors on the succession process and the post succession period.
- Full Text:
- Date Issued: 2012
- Authors: Fox, Roderick Charles
- Date: 2012
- Subjects: Family-owned business enterprises -- Succession , Family corporations -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8771 , http://hdl.handle.net/10948/d1012445 , Family-owned business enterprises -- Succession , Family corporations -- Management
- Description: Family businesses are prevalent in South Africa and throughout the world. Succession is one of the largest challenges facing family businesses. It has been estimated that only one third of family businesses survive to the second generation. This study attempts to determine what the main features are to promote successful family business succession and continuity. The family chosen for this research is the Venter family. The research has scaled the various influencing variables from the literature review into the following focus areas: relationships, conflict, vision, effective succession characteristics and continuity. The findings reflect many instances found in the literature, some are: individuals can manage themselves and have relationships with others; have the ability to resolve conflicts; have mutual support and trust; there is respect between the founder and successor; the business vision is clear; communication is open and clear and decisions are based on expertise and knowledge. Many other aspects are highlighted in the research that follows. In addition, the study attempts to identify the generational effects, the major characteristics of the family owned succession process and the views of the predecessors on the succession process and the post succession period.
- Full Text:
- Date Issued: 2012
Antibacterial and phytochemical studies of selected South African honeys on clinical isolates of Helicobacter pylori
- Authors: Manyi-Loh, Christy E
- Date: 2012
- Subjects: Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD (Microbiology)
- Identifier: vital:11240 , http://hdl.handle.net/10353/d1001056 , Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Description: Infection with Helicobacter pylori has been associated with the pathogenesis of numerous stomach and gastroduodenal diseases that pose threats to public health. Eradicaftion of this pathogen is a global challenge due to its alarming rate of multidrug resistance. Consequently, to find an alternative treatment, the search is increasingly focused on new antimicrobial product from natural sources including honey. Honey has been used as medicine in several cultures since ancient time due to its enormous biomedical activities. Its beneficial qualities have been endorsed to its antimicrobial, antioxidant, anti-inflammatory properties added to its phytocomponents. In this study, the anti-H. pylori activity of South African honeys and their solvent extracts as well as the phytochemicals present in the two most active honeys were evaluated. Agar well diffusion test was used to investigate the antimicrobial activity of six honey varieties obtained from different locations in the country. Subsequently, the honeys were extracted with four organic solvents viz n-hexane, diethyl ether, chloroform and ethyl acetate employed in order of increasing polarity. The antibacterial activity of the different solvent extracts of each honey was evaluated by agar well diffusion; broth micro dilution and time kill assays. Different chromatographic techniques (Thin layer & column chromatography) were employed to enumerate the phytochemical constituents in the most active solvent extracts of Pure Honey (PH) and Champagne Royal Train (CRT); and were identified by gas-chromatography linked mass-spectrometry. Linalool pure compound was equally evaluated for anti-H. pylori activity in a bid to trace the antibacterial agent among the variety of compounds identified. Data were analyzed by One-way ANOVA test at 95% confidence interval. Crude honeys and their solvent extracts demonstrated potent anti-H. pylori activity with zone diameter that ranged from [16.0mm (crude) to 22.2mm (extract)] and percentage susceptibilities of test isolates between 73.3% (crude) and 93.3% (extract). The chloroform extracts of PH and CRT were most active with MIC50 in the ranges 0.01- viii 10%v/v and 0.625-10%v/v respectively, not significantly different from amoxicillin (P> 0.05); and efficient bactericidal activity (100% bacterial cells killed) at 1/2MIC and 4xMIC over different time intervals, 36-72hrs and 18-72hrs respectively. The appearance of bands on the thin layer chromatography (TLC) chromatogram spotted with the chloroform extracts of PH and CRT; and developed with hexane: ethyl acetate: acetic acid (HEA) and methanol: acetic acid: water (MAAW) solvent systems indicated the presence of compounds. Purification of the compounds contained in these extracts over silica gel column yielded numerous fractions which were evaluated for antibacterial activity and purity. PHF5 was the most active fraction with a mean MIC50 value of 1.25mg/mL. Volatile compounds belonging to different known chemical families in honey were identified in all the active fractions obtained from PH. Conversely, only four compounds were identified in the active fractions obtained from CRT hence the non volatile constituents could be of prime relevance with respect to antibacterial activity of this honey. Of novelty was the presence of thiophene and N-methyl-D3-azirdine compounds, essential precursors used for the synthesis of natural products and pharmaceuticals with vital biomedical properties. Linalool demonstrated potent inhibitory (MIC95, 0.002- 0.0313mg/mL) and bactericidal activity (0.0039-0.313mg/mL) against the test isolates. On the other hand, a significant difference was recorded (P < 0.05) in comparing the activity of linalool compound to the fractions. PH could serve as a good economic source of bioactive compounds which could be employed as template for the synthesis of novel anti-H. pylori drugs. However, further studies are needed to determine the non volatile active ingredients in PH and CRT as well as toxicological testing
- Full Text:
- Date Issued: 2012
- Authors: Manyi-Loh, Christy E
- Date: 2012
- Subjects: Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD (Microbiology)
- Identifier: vital:11240 , http://hdl.handle.net/10353/d1001056 , Helicobacter pylori , Honey--South Africa , Drug resistance in microorganisms , Bacterial diseases , Honey -- Therapeutic use , Helicobacter pylori infections , Traditional medicine -- South Africa -- Eastern Cape
- Description: Infection with Helicobacter pylori has been associated with the pathogenesis of numerous stomach and gastroduodenal diseases that pose threats to public health. Eradicaftion of this pathogen is a global challenge due to its alarming rate of multidrug resistance. Consequently, to find an alternative treatment, the search is increasingly focused on new antimicrobial product from natural sources including honey. Honey has been used as medicine in several cultures since ancient time due to its enormous biomedical activities. Its beneficial qualities have been endorsed to its antimicrobial, antioxidant, anti-inflammatory properties added to its phytocomponents. In this study, the anti-H. pylori activity of South African honeys and their solvent extracts as well as the phytochemicals present in the two most active honeys were evaluated. Agar well diffusion test was used to investigate the antimicrobial activity of six honey varieties obtained from different locations in the country. Subsequently, the honeys were extracted with four organic solvents viz n-hexane, diethyl ether, chloroform and ethyl acetate employed in order of increasing polarity. The antibacterial activity of the different solvent extracts of each honey was evaluated by agar well diffusion; broth micro dilution and time kill assays. Different chromatographic techniques (Thin layer & column chromatography) were employed to enumerate the phytochemical constituents in the most active solvent extracts of Pure Honey (PH) and Champagne Royal Train (CRT); and were identified by gas-chromatography linked mass-spectrometry. Linalool pure compound was equally evaluated for anti-H. pylori activity in a bid to trace the antibacterial agent among the variety of compounds identified. Data were analyzed by One-way ANOVA test at 95% confidence interval. Crude honeys and their solvent extracts demonstrated potent anti-H. pylori activity with zone diameter that ranged from [16.0mm (crude) to 22.2mm (extract)] and percentage susceptibilities of test isolates between 73.3% (crude) and 93.3% (extract). The chloroform extracts of PH and CRT were most active with MIC50 in the ranges 0.01- viii 10%v/v and 0.625-10%v/v respectively, not significantly different from amoxicillin (P> 0.05); and efficient bactericidal activity (100% bacterial cells killed) at 1/2MIC and 4xMIC over different time intervals, 36-72hrs and 18-72hrs respectively. The appearance of bands on the thin layer chromatography (TLC) chromatogram spotted with the chloroform extracts of PH and CRT; and developed with hexane: ethyl acetate: acetic acid (HEA) and methanol: acetic acid: water (MAAW) solvent systems indicated the presence of compounds. Purification of the compounds contained in these extracts over silica gel column yielded numerous fractions which were evaluated for antibacterial activity and purity. PHF5 was the most active fraction with a mean MIC50 value of 1.25mg/mL. Volatile compounds belonging to different known chemical families in honey were identified in all the active fractions obtained from PH. Conversely, only four compounds were identified in the active fractions obtained from CRT hence the non volatile constituents could be of prime relevance with respect to antibacterial activity of this honey. Of novelty was the presence of thiophene and N-methyl-D3-azirdine compounds, essential precursors used for the synthesis of natural products and pharmaceuticals with vital biomedical properties. Linalool demonstrated potent inhibitory (MIC95, 0.002- 0.0313mg/mL) and bactericidal activity (0.0039-0.313mg/mL) against the test isolates. On the other hand, a significant difference was recorded (P < 0.05) in comparing the activity of linalool compound to the fractions. PH could serve as a good economic source of bioactive compounds which could be employed as template for the synthesis of novel anti-H. pylori drugs. However, further studies are needed to determine the non volatile active ingredients in PH and CRT as well as toxicological testing
- Full Text:
- Date Issued: 2012
A study of the selected wild edible plants utilized by indigenous people of the Amathole District in the Eastern Cape Province of South Africa
- Kwinana-Mandindi, Thozama Ndileka
- Authors: Kwinana-Mandindi, Thozama Ndileka
- Date: 2012
- Subjects: Wild plants, Edible http://id.loc.gov/authorities/subjects/sh85146686
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/19598 , vital:43147
- Description: Wild edible plants are an indispensible part of diets in some of the poor resourced rural societies. In many less resourced households a main meal comprises of a starch staple which is accompanied by a supplement of vegetables that provide the other nutritional elements as well as flavour to the meals. The vegetable relish (isishebo) thus, becomes an important component of the diet. The sustenance of many such resource poor indigenous societies over many generations has been as a result of their reliance on a readily available supply of their nutritional requirements, where edible wild plants formed the major food source. Wild edible plants provided the most important source of nutritional supply even during times of drought and famine. However, lifestyle changes have caused a serious reduction of the gathering and use of the wild edible vegetables, knowledge about them and the local culture are also lost with them. Unfortunately, others have come to regard their traditional food resource base as primitive and inferior and have come to rely on new exotic food plant whose supply is unstable and narrow compared to the wide variety of wild edible plants. Even when drought challenges play destruction with food availability, resulting in food shortages due to the reliance on cultivated crops that are poorly adapted to local conditions, communities cannot go back to the unknown food plants. However, detailed scientific investigations are needed to understand and preserve wild food uses. This study was undertaken to add to that body of knowledge. It started with an ethnobotanic survey of the use of wild food plants in 10 selected rural villages and peri-urban dwellings in the Amathole District of the Eastern Cape. These rural areas were chosen because of the belief that there are still individuals who possess the wealth of traditional knowledge within those remote areas in addition to that the villages are surrounded by indigenous vegetation from which they could be harvesting some indigenous food plants. Furthermore, the relationship between people and plants are often clearer in indigenous/traditional societies since the link between production and consumption is more direct. Besides the survey, this research employed various methods including Inductively Coupled Argon (ICP) analyses of minerals and vitamins, determination of phytochemicals and antioxidant/bio-activity that of, higher performance liquid chromatography (HPLC) determination of other vitamins, assessment of proximate and anti-nutrient compositions of raw and cooked samples of plants, scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDXS) to look into the micro-morphology of leaves for details that might have a bearing in the nutrient composition of the wild edible vegetables. This was done with the aim to explore and highlight the wild-food-plant base of indigenous people, to investigate the nutritional value of the selected frequently consumed wild vegetables and to recommend ways of educating people on the value of such plants and the need to promote their continued sustainable use as well as preservation of them for the benefit of people who cannot afford a continuous nutritious meal particularly among rural communities. Twenty-five (25) indigenous wild food plants which included leafy vegetables, nuts and fruits species were identified as being arbitrarily gathered and utilised as food, of which seven wild leafy vegetable species were often mentioned as common among the 15 dwellings surveyed and most frequently consumed by the respondents. Two additional plants were also frequently used as flavoring and in their raw state respectively. Wild edible vegetables were mainly eaten boiled as ‘laxa’, mixed with maize meal as ‘imifino’, fried as relish ‘isishebo’ or raw for both snacking purposes and medicinal functions. Wild edible plant species in the Amathole District of the Eastern Cape-South Africa were documented with respect to their uses and knowledge or identification. Four indigenous wild vegetables (Chenopodium album, Solanum nigrum/nodiflorum, Amaranthus dubius and Urtica lobulata) frequently consumed by the indigenous communities in the study region were selected. All the plant species had a remarkably high content of pro-anthocyanidins (between 58.42 and 65.18 mg/g) and also exhibited high radical scavenging activity in vitro. S. nigrum and C. album were found to be rich sources of ascorbic acid, having 1.05mg/100g and 1.01mg/100g, respectively. The entire wild, traditionally edible plants contain reasonably good concentrations of riboflavin while U. lobulata was found to contain maximum amount of thiamine. All plant species were rich sources of minerals and vitamins (both water soluble and fat soluble). Appropriate cooking methods are to be used to enhance the bio-availability of vitamins and nutrients in general. Cooking generally improved the nutritive value in certain wild vegetables. However, some nutrients were drained away. For example micro-nutrient and anti-nutrient component in the ash were reduced in cooking. The EDXS analysis has shown that the indigenous, wild vegetables in the Amathole District of South Africa are excellent sources of minerals, while the mineral crystals present at the level of the mesophyll of the indigenous wild vegetables were probably mixtures of calcium oxalate, calcium sulphate and silica. Saponin, tannins, oxalates, phytates and alkaloids are present in all the indigenous wild vegetables, but in minimal safe quantities. Nutritional analysis of some wild food plants demonstrates that in many cases the nutritional quality of the plants is comparable and in some cases even superior to domesticated exotic varieties. Knowledge about gathering and use of some wild food species is common among the rural dwellers. However, most uses are known by few elderly informants only. Education, awareness campaigns and revival of use of wild edible plants directed at the youth particularly is essential and this can be done through all forms of media. , Thesis (PhD) (Ethnobotany) -- University of Fort Hare, 2012
- Full Text:
- Date Issued: 2012
- Authors: Kwinana-Mandindi, Thozama Ndileka
- Date: 2012
- Subjects: Wild plants, Edible http://id.loc.gov/authorities/subjects/sh85146686
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/19598 , vital:43147
- Description: Wild edible plants are an indispensible part of diets in some of the poor resourced rural societies. In many less resourced households a main meal comprises of a starch staple which is accompanied by a supplement of vegetables that provide the other nutritional elements as well as flavour to the meals. The vegetable relish (isishebo) thus, becomes an important component of the diet. The sustenance of many such resource poor indigenous societies over many generations has been as a result of their reliance on a readily available supply of their nutritional requirements, where edible wild plants formed the major food source. Wild edible plants provided the most important source of nutritional supply even during times of drought and famine. However, lifestyle changes have caused a serious reduction of the gathering and use of the wild edible vegetables, knowledge about them and the local culture are also lost with them. Unfortunately, others have come to regard their traditional food resource base as primitive and inferior and have come to rely on new exotic food plant whose supply is unstable and narrow compared to the wide variety of wild edible plants. Even when drought challenges play destruction with food availability, resulting in food shortages due to the reliance on cultivated crops that are poorly adapted to local conditions, communities cannot go back to the unknown food plants. However, detailed scientific investigations are needed to understand and preserve wild food uses. This study was undertaken to add to that body of knowledge. It started with an ethnobotanic survey of the use of wild food plants in 10 selected rural villages and peri-urban dwellings in the Amathole District of the Eastern Cape. These rural areas were chosen because of the belief that there are still individuals who possess the wealth of traditional knowledge within those remote areas in addition to that the villages are surrounded by indigenous vegetation from which they could be harvesting some indigenous food plants. Furthermore, the relationship between people and plants are often clearer in indigenous/traditional societies since the link between production and consumption is more direct. Besides the survey, this research employed various methods including Inductively Coupled Argon (ICP) analyses of minerals and vitamins, determination of phytochemicals and antioxidant/bio-activity that of, higher performance liquid chromatography (HPLC) determination of other vitamins, assessment of proximate and anti-nutrient compositions of raw and cooked samples of plants, scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDXS) to look into the micro-morphology of leaves for details that might have a bearing in the nutrient composition of the wild edible vegetables. This was done with the aim to explore and highlight the wild-food-plant base of indigenous people, to investigate the nutritional value of the selected frequently consumed wild vegetables and to recommend ways of educating people on the value of such plants and the need to promote their continued sustainable use as well as preservation of them for the benefit of people who cannot afford a continuous nutritious meal particularly among rural communities. Twenty-five (25) indigenous wild food plants which included leafy vegetables, nuts and fruits species were identified as being arbitrarily gathered and utilised as food, of which seven wild leafy vegetable species were often mentioned as common among the 15 dwellings surveyed and most frequently consumed by the respondents. Two additional plants were also frequently used as flavoring and in their raw state respectively. Wild edible vegetables were mainly eaten boiled as ‘laxa’, mixed with maize meal as ‘imifino’, fried as relish ‘isishebo’ or raw for both snacking purposes and medicinal functions. Wild edible plant species in the Amathole District of the Eastern Cape-South Africa were documented with respect to their uses and knowledge or identification. Four indigenous wild vegetables (Chenopodium album, Solanum nigrum/nodiflorum, Amaranthus dubius and Urtica lobulata) frequently consumed by the indigenous communities in the study region were selected. All the plant species had a remarkably high content of pro-anthocyanidins (between 58.42 and 65.18 mg/g) and also exhibited high radical scavenging activity in vitro. S. nigrum and C. album were found to be rich sources of ascorbic acid, having 1.05mg/100g and 1.01mg/100g, respectively. The entire wild, traditionally edible plants contain reasonably good concentrations of riboflavin while U. lobulata was found to contain maximum amount of thiamine. All plant species were rich sources of minerals and vitamins (both water soluble and fat soluble). Appropriate cooking methods are to be used to enhance the bio-availability of vitamins and nutrients in general. Cooking generally improved the nutritive value in certain wild vegetables. However, some nutrients were drained away. For example micro-nutrient and anti-nutrient component in the ash were reduced in cooking. The EDXS analysis has shown that the indigenous, wild vegetables in the Amathole District of South Africa are excellent sources of minerals, while the mineral crystals present at the level of the mesophyll of the indigenous wild vegetables were probably mixtures of calcium oxalate, calcium sulphate and silica. Saponin, tannins, oxalates, phytates and alkaloids are present in all the indigenous wild vegetables, but in minimal safe quantities. Nutritional analysis of some wild food plants demonstrates that in many cases the nutritional quality of the plants is comparable and in some cases even superior to domesticated exotic varieties. Knowledge about gathering and use of some wild food species is common among the rural dwellers. However, most uses are known by few elderly informants only. Education, awareness campaigns and revival of use of wild edible plants directed at the youth particularly is essential and this can be done through all forms of media. , Thesis (PhD) (Ethnobotany) -- University of Fort Hare, 2012
- Full Text:
- Date Issued: 2012
Synthetic and bioactivity studies of antiplasmodial and antibacterial marine natural products
- Authors: Young, Ryan Mark
- Date: 2012
- Subjects: Antibacterial agents Marine natural products Marine pharmacology Plasmodium falciparum Staphylococcus aureus Isocyanides Imidazoles
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4378 , http://hdl.handle.net/10962/d1005043
- Description: This thesis is divided into two parts, assessing marine and synthetic compounds active firstly against Plasmodium falciparum (Chapter 3 and 4) and secondly active against methicillin resistant Staphylococcus aureus (MRSA, Chapter 5). In Chapter 3 the synthesis of nine new tricyclic podocarpanes (3.203-3.207 and 3.209-3.212) from the diterpene (+)-manool is described. Initial SAR study of synthetic podocarpanes concluded that the most active compound was a C-13 phenyl substituted podocarpane (3.204, IC₅₀ 6.6 μM). By preparing analogues with varying halogenated substituents on the phenyl ring (3.209-3.212) the antiplasmodial activity was improved (IC₅₀ 1.4 μM), while simultaneously decreasing the haemolysis previously reported for this class of compounds. Inspired by the antiplasmodial activity of Wright and Wattanapiromsakul’s tricycle marine isonitriles (2.16-2.21 and 2.24-2.27) an unsuccessfully attempt was made to convert tertiary alcohol moieties to isonitrile functionalities in compounds 3.188, 3.204-3.207 and 3.209-3.212. Over a decade ago Wright et al. proposed a putative antiplasmodial mechanism of action for marine isonitriles (2.4, 2.9, 2.15, 2.19 and 2.35) and isothiocyanate (2.34) which involved interference in haem detoxification by P. falciparum thus inhibiting the growth of the parasite. In Chapter 4 we describe how we successfully managed to scale down Egan’s β-haematin inhibition assay for the analyses of small quantities of marine natural products as potential β-haematin inhibitors. Our modified assay revealed that the most active antiplasmodial marine isonitrile 2.9 (IC₅₀ 13 nM) showed total β-haematin inhibition while 2.15 (IC₅₀ 81 nM) and 2.19 (IC₅₀ 31 nM) showed partial inhibition at three equivalents relative to haem. Using contempary molecular modelling techniques the charge on the isonitrile functionality was more accurately describe and the modified charge data sets was used to explore docking of marine isonitriles to haem using AutoDock. In Chapter 5 we describe how a lead South African marine bisindole MRSA pyruvate kinase inhibitor (5.8) was discovered in collaboration with colleagues at the University of British Columbia (UBC) and how this discovery inspired us to design a synthetic route to the dibrominated bisindole, isobromotopsentin (5.20) in an attempt to increase the bioactivity displayed by 5.8. We devised a fast and high yielding synthetic route using microwave assited organic synthesis. We first tested this synthesis using simple aryl glyoxals (5.27-5.32) as precursors to synthesize biphenylimidazoles (5.21-5.26), which later allowed us to synthesize the ascidian natural product 5.111. This method was sucessfully extended to the synthesis of deoxytopsentin (5.33) from an N-Boc protected indole methyl ketone (5.89). We subsequently were able to effectively remove the carbamate protection via thermal decomposition by heating the protected bisindole imidazole (5.90) in a microwave reactor for 5 min under argon. The synthesis of 5.20 resulted in an inseparable mixture of monoprotected and totally deprotected topsentin products, and due to time constraints we were not able to optimise this synthesis. Nonetheless our synthesis of the marine natural product 5.33 which was faster and higher yielding than previously reported routes could be extended to the synthesis of other topsentin bisindoles (5.138-5.140). Work towards this goal continues in our laboratory.
- Full Text:
- Date Issued: 2012
- Authors: Young, Ryan Mark
- Date: 2012
- Subjects: Antibacterial agents Marine natural products Marine pharmacology Plasmodium falciparum Staphylococcus aureus Isocyanides Imidazoles
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4378 , http://hdl.handle.net/10962/d1005043
- Description: This thesis is divided into two parts, assessing marine and synthetic compounds active firstly against Plasmodium falciparum (Chapter 3 and 4) and secondly active against methicillin resistant Staphylococcus aureus (MRSA, Chapter 5). In Chapter 3 the synthesis of nine new tricyclic podocarpanes (3.203-3.207 and 3.209-3.212) from the diterpene (+)-manool is described. Initial SAR study of synthetic podocarpanes concluded that the most active compound was a C-13 phenyl substituted podocarpane (3.204, IC₅₀ 6.6 μM). By preparing analogues with varying halogenated substituents on the phenyl ring (3.209-3.212) the antiplasmodial activity was improved (IC₅₀ 1.4 μM), while simultaneously decreasing the haemolysis previously reported for this class of compounds. Inspired by the antiplasmodial activity of Wright and Wattanapiromsakul’s tricycle marine isonitriles (2.16-2.21 and 2.24-2.27) an unsuccessfully attempt was made to convert tertiary alcohol moieties to isonitrile functionalities in compounds 3.188, 3.204-3.207 and 3.209-3.212. Over a decade ago Wright et al. proposed a putative antiplasmodial mechanism of action for marine isonitriles (2.4, 2.9, 2.15, 2.19 and 2.35) and isothiocyanate (2.34) which involved interference in haem detoxification by P. falciparum thus inhibiting the growth of the parasite. In Chapter 4 we describe how we successfully managed to scale down Egan’s β-haematin inhibition assay for the analyses of small quantities of marine natural products as potential β-haematin inhibitors. Our modified assay revealed that the most active antiplasmodial marine isonitrile 2.9 (IC₅₀ 13 nM) showed total β-haematin inhibition while 2.15 (IC₅₀ 81 nM) and 2.19 (IC₅₀ 31 nM) showed partial inhibition at three equivalents relative to haem. Using contempary molecular modelling techniques the charge on the isonitrile functionality was more accurately describe and the modified charge data sets was used to explore docking of marine isonitriles to haem using AutoDock. In Chapter 5 we describe how a lead South African marine bisindole MRSA pyruvate kinase inhibitor (5.8) was discovered in collaboration with colleagues at the University of British Columbia (UBC) and how this discovery inspired us to design a synthetic route to the dibrominated bisindole, isobromotopsentin (5.20) in an attempt to increase the bioactivity displayed by 5.8. We devised a fast and high yielding synthetic route using microwave assited organic synthesis. We first tested this synthesis using simple aryl glyoxals (5.27-5.32) as precursors to synthesize biphenylimidazoles (5.21-5.26), which later allowed us to synthesize the ascidian natural product 5.111. This method was sucessfully extended to the synthesis of deoxytopsentin (5.33) from an N-Boc protected indole methyl ketone (5.89). We subsequently were able to effectively remove the carbamate protection via thermal decomposition by heating the protected bisindole imidazole (5.90) in a microwave reactor for 5 min under argon. The synthesis of 5.20 resulted in an inseparable mixture of monoprotected and totally deprotected topsentin products, and due to time constraints we were not able to optimise this synthesis. Nonetheless our synthesis of the marine natural product 5.33 which was faster and higher yielding than previously reported routes could be extended to the synthesis of other topsentin bisindoles (5.138-5.140). Work towards this goal continues in our laboratory.
- Full Text:
- Date Issued: 2012
Enabling social learning as a response to environmental issues through teaching of localised curriculum in Zambian schools
- Authors: Sinyama, Imakando
- Date: 2012
- Subjects: Social learning -- Zambia -- Keembe (Central Province) Environmental education -- Zambia -- Keembe (Central Province) Environmental education -- Study and teaching -- Zambia -- Keembe (Central Province) Sustainable development -- Study and teaching -- Zambia -- Keembe (Central Province) Curriculum change -- Zambia -- Keembe (Central Province) Educational evaluation -- Zambia -- Keembe (Central Province)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1508 , http://hdl.handle.net/10962/d1003390
- Description: Schools are traditionally established as the main meeting platforms for awareness, education, training and capacity building in the local communities, and as such, are highly regarded and respected. They are situated and integrated in nearly all local communities. They are thus perfectly suited to reach, draw on and provide capacity building to the communities. Zambia recently introduced a new curriculum aspect named localised curriculum, which makes up 20% of the curriculum. This curriculum area encourages schools to address issues of sustainable development that are locally relevant through this curriculum component, but it is not clear what kind of learning emerges from this curriculum aspect. The study looked at the shift in pedagogical discourse since the introduction of the localised curriculum. Using case study methodology and observation of a number of classroom activities in the Keemba District near Monze in Zambia, I observed social learning interactions taking place in the implementation of the localised curriculum. In particular, I was interested in how the different aspects of the localised curriculum enabled social learning, at different levels. What is important in this research is that it focused not so much on what people should know, or be able to do, but rather, drawing on some of the questions raised by Wals (2007), I considered questions of how people learn, and how social learning emerges in school-community interactions in the localised curriculum. The main research question was to investigate: How does localised curriculum enable social learning in response to environmental issues in Zambian schools? This research drew on a number of associated research projects that were carried out in southern Africa and beyond. In his research, Namafe (2008) states that he saw a great need to institutionalise increased participation of Zambian Basic Schools and their local communities in sustainable development of the country in order to alleviate poverty and achieve equitable development. Hogan (2008, p. 122 ) researching in a different context, argues that contextualisation of the curriculum allowed for indigenous knowledge to come in to the classroom, stating that ‘Weakening of the frames provided the opportunity of closer relationships to give space for knowledge other than teacher selected knowledge or book knowledge to enter the classroom.’ In this study I found that: - Teaching localised curriculum allowed for contextualisation and integration of environment and natural resource management issues - Localising the curriculum contributed to curriculum relevancy: teaching localised curriculum helped learners, teachers and community to develop concern for quality of life and contributed to an understanding of sustainable development - Localised curriculum allowed for frame awareness, frame deconstruction and reframing to take place: this allowed teachers to use methods which promoted active pupil participation and interaction, encouraging learners to be reflexive thinkers rather than just using rote memory - Participation of teachers, community and learners in the implementation of the localised curriculum: The involvement of community members to teach topics of the localised curriculum was useful and articulated processes of inter–epistemological dialogue between traditional or every day and scientific or institutional knowledge - The localised curriculum implementation involved various roles and was influenced by various factors. Of key interest to this study was the fact that neither parents, learners nor teachers saw the localised curriculum as an opportunity for problem solving, but rather emphasised the learning of practical life skills relevant to the community. This differed from the curriculum manuals, and reduced the environmental education potential and also social learning opportunities.
- Full Text:
- Date Issued: 2012
- Authors: Sinyama, Imakando
- Date: 2012
- Subjects: Social learning -- Zambia -- Keembe (Central Province) Environmental education -- Zambia -- Keembe (Central Province) Environmental education -- Study and teaching -- Zambia -- Keembe (Central Province) Sustainable development -- Study and teaching -- Zambia -- Keembe (Central Province) Curriculum change -- Zambia -- Keembe (Central Province) Educational evaluation -- Zambia -- Keembe (Central Province)
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1508 , http://hdl.handle.net/10962/d1003390
- Description: Schools are traditionally established as the main meeting platforms for awareness, education, training and capacity building in the local communities, and as such, are highly regarded and respected. They are situated and integrated in nearly all local communities. They are thus perfectly suited to reach, draw on and provide capacity building to the communities. Zambia recently introduced a new curriculum aspect named localised curriculum, which makes up 20% of the curriculum. This curriculum area encourages schools to address issues of sustainable development that are locally relevant through this curriculum component, but it is not clear what kind of learning emerges from this curriculum aspect. The study looked at the shift in pedagogical discourse since the introduction of the localised curriculum. Using case study methodology and observation of a number of classroom activities in the Keemba District near Monze in Zambia, I observed social learning interactions taking place in the implementation of the localised curriculum. In particular, I was interested in how the different aspects of the localised curriculum enabled social learning, at different levels. What is important in this research is that it focused not so much on what people should know, or be able to do, but rather, drawing on some of the questions raised by Wals (2007), I considered questions of how people learn, and how social learning emerges in school-community interactions in the localised curriculum. The main research question was to investigate: How does localised curriculum enable social learning in response to environmental issues in Zambian schools? This research drew on a number of associated research projects that were carried out in southern Africa and beyond. In his research, Namafe (2008) states that he saw a great need to institutionalise increased participation of Zambian Basic Schools and their local communities in sustainable development of the country in order to alleviate poverty and achieve equitable development. Hogan (2008, p. 122 ) researching in a different context, argues that contextualisation of the curriculum allowed for indigenous knowledge to come in to the classroom, stating that ‘Weakening of the frames provided the opportunity of closer relationships to give space for knowledge other than teacher selected knowledge or book knowledge to enter the classroom.’ In this study I found that: - Teaching localised curriculum allowed for contextualisation and integration of environment and natural resource management issues - Localising the curriculum contributed to curriculum relevancy: teaching localised curriculum helped learners, teachers and community to develop concern for quality of life and contributed to an understanding of sustainable development - Localised curriculum allowed for frame awareness, frame deconstruction and reframing to take place: this allowed teachers to use methods which promoted active pupil participation and interaction, encouraging learners to be reflexive thinkers rather than just using rote memory - Participation of teachers, community and learners in the implementation of the localised curriculum: The involvement of community members to teach topics of the localised curriculum was useful and articulated processes of inter–epistemological dialogue between traditional or every day and scientific or institutional knowledge - The localised curriculum implementation involved various roles and was influenced by various factors. Of key interest to this study was the fact that neither parents, learners nor teachers saw the localised curriculum as an opportunity for problem solving, but rather emphasised the learning of practical life skills relevant to the community. This differed from the curriculum manuals, and reduced the environmental education potential and also social learning opportunities.
- Full Text:
- Date Issued: 2012
The incidence and mechanism of injuries occurring at a South African National Judo Championship
- Authors: Du Preez, Devon
- Date: 2012
- Subjects: Judo injuries , Martial arts injuries
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10099 , http://hdl.handle.net/10948/d1011666 , Judo injuries , Martial arts injuries
- Description: The aim of the current study was to identify and describe the incidence and mechanism of injuries that occurred to judoka at a South African national tournament. Therefore the objectives of the study were to determine the following: To describe and compare the type and incidence of injuries occurring at a South African national championship in respect of three different age groups as well as gender; To describe and compare the types of mechanisms occurring at a South African national championship in respect of three different age groups as well as gender; To describe and determine the treatment methods used by judoka at a South African national championship. To determine and describe the training methods of judoka and the potential impact on incidence of injuries at the relevant national judo championship. To achieve the aims and objectives set out in the present study, the literature regarding injury incidence and mechanisms causing those injuries were reviewed along with other martial arts, in order for comparisons to be made within judo and other martial arts. To evaluate and describe injury in judo an exploratory-descriptive epidemiological approach was used in order to gather relevant data. The use of detailed questionnaires was used to capture information regarding physical preparation for the tournament along with a screening questionnaire that captured important data relating to injuries prior to competing in the South African national tournament. In order for the main aim of the study to be achieved an injury questionnaire was presented to all injured judoka who partook in the study at the tournament. This questionnaire captured critical information regarding the occurring injury and the mechanism responsible for the injury. Judoka sampled consisted of 141 judoka of which 110 were males and 31 were females. This sample size of judoka consisted of three age groups with each group representing a different age range. This allowed for the observation of more injuries but also allowed one to compare injuries obtained by younger judoka to that of older judoka. For the purposes of this study groups 4 (ages 14 to 16), 5 (ages 17 to 19) and 6 (ages 20 and older) were used. The reason for selecting these three age groups was due to the fact that they would be participating under international regulations with strangulations and armlocks allowed for in a fight. Group 4 consisted of 49 judoka; the smallest group studied was that of group 5 and consisted of 28 judoka with group 6 being the largest sampled group with 64 judoka. Of the 141 sampled judoka 103 injuries were recorded with males obtaining more injuries than that of female judoka. The results from the study were placed into table and graph formats and described via descriptive statistics. In order to explain the variation within groups inferential statistics as well as Cohen‟s d were utilised to determine both statistical and practical significances between the different age groups. When describing statistics via the use of frequency distribution tables, statistical significance was tested via Chi2 tests of independence, Cramér‟s V was utilized to determine practical significance. Analysis of variance (ANOVA) was done to determine intra-group differences with the F statistic reported for significant findings as it reports the variance of group means. The present study found that male judoka within their respective age groups competed in judo for a longer duration than that of females, that the older the judoka was the greater the likelihood that the judoka would have competed for a longer duration of time at a provincial level of judo with group 5 and 6 having competed on a provincial level longer than that of group 4 judoka. Over a 12 month period judoka sustained almost four minor injuries and less than one major injury on average. Females on average were found to have sustained more minor injuries over a period of a year than that of males. The results indicate that only 37.9 percent of judoka compete with existing injuries with more males (40.0 percent) participating with an existing injury compared to that of females at 31.5 percent. The time spent training the various judo components was similar across all three age groups with a statistically significant differences (F (1,81) =4.216, p=.043) found between the genders of group 4 males and females with males practicing more ne-waza a week. On average time spent doing gym work was 177.39 minutes a month with males training for a longer duration 192.69 minutes a month than that of females. Group 5 judoka spent the greatest time in a month doing gym training at 201.35 minutes a month. A gender difference was noted in upper body strength training (F (1,81) = 4.12, p =.046). Males favoured upper body strength training compared to that of females. A total of 103 (73.0 percent) of the sample group were injured once or more. Group 4 judoka (age 16 to 17) had the highest injury incidence for incurring a injury at least once at 75.5 percent. The injury incidence for groups 5 (age 18 to 19) and 6 (age 20 + years) for incurring at least one injury was 71.4 percent and 50.0 percent respectively. The results indicate that 72.7 percent of males reported at least one injury compared to 74.2 percent of females. The present study found that the head and neck (42.7 percent) followed by the upper body (34.0 percent) to be the anatomical regions with the highest incidence of injury. The upper body anatomical site most frequently injured as expected was the shoulder joint at 11.7 percent with the knee, the lower body site with the greatest incidence of injury. Cuts (38.8 percent) accounted for the largest proportion of injuries with the most occurring injury to males being that of a cut (45.6 percent) and sprains (37.5 percent) for females. A statistically significant difference was found between the two genders in relation to the types of occurring injuries, with a moderate practical significance noticed (Chi2 (4) = 12.33, p = .015, V = 0.35). The major mechanisms of injury to the judoka was throwing / being thrown (35.5 percent) and impacts / collisions with other judoka (33.9 percent). These mechanisms of injury were also identified as the major mechanisms leading to injury in both genders. A total of 17.7 percent of fights were terminated due to injury with fewer males (14.5 percent) having fights terminated due to a serious injury compared to that of females (29.0 percent). A statistically significant difference was found between the two genders in relation to the termination of fights due to injuries with a small practical significance noticed with (Chi2(1) = 7.93, p = .005, V = 0.19). The most identified treatment at the tournament for judo was that of icing the injured area. Male judoka indicated 36.4 percent of injuries were treated with ice with females treating 36.0 percent of their injuries with ice. Males indicated that the return to the sport after becoming injured was less (0.75 weeks) than that of females (1.71 weeks) and a statistically significant difference was found between the genders and recovering from injury (F (1,81) = 4.22, p = .043, d = 0.41).
- Full Text:
- Date Issued: 2012
- Authors: Du Preez, Devon
- Date: 2012
- Subjects: Judo injuries , Martial arts injuries
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:10099 , http://hdl.handle.net/10948/d1011666 , Judo injuries , Martial arts injuries
- Description: The aim of the current study was to identify and describe the incidence and mechanism of injuries that occurred to judoka at a South African national tournament. Therefore the objectives of the study were to determine the following: To describe and compare the type and incidence of injuries occurring at a South African national championship in respect of three different age groups as well as gender; To describe and compare the types of mechanisms occurring at a South African national championship in respect of three different age groups as well as gender; To describe and determine the treatment methods used by judoka at a South African national championship. To determine and describe the training methods of judoka and the potential impact on incidence of injuries at the relevant national judo championship. To achieve the aims and objectives set out in the present study, the literature regarding injury incidence and mechanisms causing those injuries were reviewed along with other martial arts, in order for comparisons to be made within judo and other martial arts. To evaluate and describe injury in judo an exploratory-descriptive epidemiological approach was used in order to gather relevant data. The use of detailed questionnaires was used to capture information regarding physical preparation for the tournament along with a screening questionnaire that captured important data relating to injuries prior to competing in the South African national tournament. In order for the main aim of the study to be achieved an injury questionnaire was presented to all injured judoka who partook in the study at the tournament. This questionnaire captured critical information regarding the occurring injury and the mechanism responsible for the injury. Judoka sampled consisted of 141 judoka of which 110 were males and 31 were females. This sample size of judoka consisted of three age groups with each group representing a different age range. This allowed for the observation of more injuries but also allowed one to compare injuries obtained by younger judoka to that of older judoka. For the purposes of this study groups 4 (ages 14 to 16), 5 (ages 17 to 19) and 6 (ages 20 and older) were used. The reason for selecting these three age groups was due to the fact that they would be participating under international regulations with strangulations and armlocks allowed for in a fight. Group 4 consisted of 49 judoka; the smallest group studied was that of group 5 and consisted of 28 judoka with group 6 being the largest sampled group with 64 judoka. Of the 141 sampled judoka 103 injuries were recorded with males obtaining more injuries than that of female judoka. The results from the study were placed into table and graph formats and described via descriptive statistics. In order to explain the variation within groups inferential statistics as well as Cohen‟s d were utilised to determine both statistical and practical significances between the different age groups. When describing statistics via the use of frequency distribution tables, statistical significance was tested via Chi2 tests of independence, Cramér‟s V was utilized to determine practical significance. Analysis of variance (ANOVA) was done to determine intra-group differences with the F statistic reported for significant findings as it reports the variance of group means. The present study found that male judoka within their respective age groups competed in judo for a longer duration than that of females, that the older the judoka was the greater the likelihood that the judoka would have competed for a longer duration of time at a provincial level of judo with group 5 and 6 having competed on a provincial level longer than that of group 4 judoka. Over a 12 month period judoka sustained almost four minor injuries and less than one major injury on average. Females on average were found to have sustained more minor injuries over a period of a year than that of males. The results indicate that only 37.9 percent of judoka compete with existing injuries with more males (40.0 percent) participating with an existing injury compared to that of females at 31.5 percent. The time spent training the various judo components was similar across all three age groups with a statistically significant differences (F (1,81) =4.216, p=.043) found between the genders of group 4 males and females with males practicing more ne-waza a week. On average time spent doing gym work was 177.39 minutes a month with males training for a longer duration 192.69 minutes a month than that of females. Group 5 judoka spent the greatest time in a month doing gym training at 201.35 minutes a month. A gender difference was noted in upper body strength training (F (1,81) = 4.12, p =.046). Males favoured upper body strength training compared to that of females. A total of 103 (73.0 percent) of the sample group were injured once or more. Group 4 judoka (age 16 to 17) had the highest injury incidence for incurring a injury at least once at 75.5 percent. The injury incidence for groups 5 (age 18 to 19) and 6 (age 20 + years) for incurring at least one injury was 71.4 percent and 50.0 percent respectively. The results indicate that 72.7 percent of males reported at least one injury compared to 74.2 percent of females. The present study found that the head and neck (42.7 percent) followed by the upper body (34.0 percent) to be the anatomical regions with the highest incidence of injury. The upper body anatomical site most frequently injured as expected was the shoulder joint at 11.7 percent with the knee, the lower body site with the greatest incidence of injury. Cuts (38.8 percent) accounted for the largest proportion of injuries with the most occurring injury to males being that of a cut (45.6 percent) and sprains (37.5 percent) for females. A statistically significant difference was found between the two genders in relation to the types of occurring injuries, with a moderate practical significance noticed (Chi2 (4) = 12.33, p = .015, V = 0.35). The major mechanisms of injury to the judoka was throwing / being thrown (35.5 percent) and impacts / collisions with other judoka (33.9 percent). These mechanisms of injury were also identified as the major mechanisms leading to injury in both genders. A total of 17.7 percent of fights were terminated due to injury with fewer males (14.5 percent) having fights terminated due to a serious injury compared to that of females (29.0 percent). A statistically significant difference was found between the two genders in relation to the termination of fights due to injuries with a small practical significance noticed with (Chi2(1) = 7.93, p = .005, V = 0.19). The most identified treatment at the tournament for judo was that of icing the injured area. Male judoka indicated 36.4 percent of injuries were treated with ice with females treating 36.0 percent of their injuries with ice. Males indicated that the return to the sport after becoming injured was less (0.75 weeks) than that of females (1.71 weeks) and a statistically significant difference was found between the genders and recovering from injury (F (1,81) = 4.22, p = .043, d = 0.41).
- Full Text:
- Date Issued: 2012