I remember having mac and cheese at my gran’s house:
- Authors: Rennie, Gillian
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159471 , vital:40300 , https://hdl.handle.net/10520/EJC139376
- Description: In a tutorial entitled The evolution of MEdia, writing and editing lecturer Gillian Rennie introduced Rhodes University first-year journalism and media studies students to Denis Hirson's I Remember King Kong (the boxer) and asked them to write their own I Remember, focusing on their personal relationships with the media. This is the edited result of a collective exercise in recollection by 270 students.
- Full Text:
- Date Issued: 2010
- Authors: Rennie, Gillian
- Date: 2010
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/159471 , vital:40300 , https://hdl.handle.net/10520/EJC139376
- Description: In a tutorial entitled The evolution of MEdia, writing and editing lecturer Gillian Rennie introduced Rhodes University first-year journalism and media studies students to Denis Hirson's I Remember King Kong (the boxer) and asked them to write their own I Remember, focusing on their personal relationships with the media. This is the edited result of a collective exercise in recollection by 270 students.
- Full Text:
- Date Issued: 2010
Identifying annotations for adventure game generation from fiction text
- Berkland, Ross, Bangay, Shaun D
- Authors: Berkland, Ross , Bangay, Shaun D
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433366 , vital:72965 , https://doi.org/10.1145/1899503.1899506
- Description: Recent advancements in Text-to-Scene research have lead to the devel-opment of systems which automatically extract key concepts from the text of a fiction book and generate computer animated movies depicting the sto-ry. Extracting such annotations from raw fiction text is a laborious process and so in this work we evaluate appropriate candidates to serve as the basis for the required annotations for generating interactive virtual worlds. We val-idate our choice by generating adventure games: interactive virtual worlds which create a stylized representation of the environment described in the text, populate it with characters related to the story and define game goals related to the plot of the fiction story. Our prototype produces a fully playa-ble game, making use of an existing open-source game engine. The pro-cess is evaluated using user tests in which participants are asked to meas-ure the accuracy with which the game represents the events, characters and goals described in the story. The response indicates that the chosen an-notation set is sufficient to define a game that is a plausibly acceptable rep-resentation of the text.
- Full Text:
- Date Issued: 2010
- Authors: Berkland, Ross , Bangay, Shaun D
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/433366 , vital:72965 , https://doi.org/10.1145/1899503.1899506
- Description: Recent advancements in Text-to-Scene research have lead to the devel-opment of systems which automatically extract key concepts from the text of a fiction book and generate computer animated movies depicting the sto-ry. Extracting such annotations from raw fiction text is a laborious process and so in this work we evaluate appropriate candidates to serve as the basis for the required annotations for generating interactive virtual worlds. We val-idate our choice by generating adventure games: interactive virtual worlds which create a stylized representation of the environment described in the text, populate it with characters related to the story and define game goals related to the plot of the fiction story. Our prototype produces a fully playa-ble game, making use of an existing open-source game engine. The pro-cess is evaluated using user tests in which participants are asked to meas-ure the accuracy with which the game represents the events, characters and goals described in the story. The response indicates that the chosen an-notation set is sufficient to define a game that is a plausibly acceptable rep-resentation of the text.
- Full Text:
- Date Issued: 2010
Identifying, recording and monitoring adverse effects associated with antriretroviral treatment
- Authors: Mulinge, Florence Muthoni
- Date: 2010
- Subjects: Highly active antiretroviral therapy , Antiretroviral agents -- South Africa -- Uitenhage , HIV infections -- Treatment -- South Africa -- Uitenhage , AIDS (Disease) -- Treatment -- South Africa -- Uitenhage
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:10131 , http://hdl.handle.net/10948/1491 , Highly active antiretroviral therapy , Antiretroviral agents -- South Africa -- Uitenhage , HIV infections -- Treatment -- South Africa -- Uitenhage , AIDS (Disease) -- Treatment -- South Africa -- Uitenhage
- Description: South Africa, with an estimated 5.7 million people living with HIV, continues to have one of the largest epidemics in the world. The introduction of HAART resulted in prolonged and improved quality of life of many infected patients. However, adverse effects caused by these drugs have become a major concern as they affect the adherence of patients and in some cases even result in the death of patients. Although much research has been and is still being conducted in the area of understanding, preventing and management of ARV adverse effects, there is still a need for patients to be actively involved in self-monitoring for adverse effects. This will assist health care professionals in early identification of serious or potentially serious ARV effects. This study aimed at evaluating the usefulness of strategies developed and employed in the identification, recording and monitoring of adverse effects. The study was conducted with patients receiving HAART from a private HIV and AIDS clinic in Uitenhage, Eastern Cape, South Africa. The research project was approved by the Nelson Mandela Metropolitan University Research and Ethics Committee and the research site. This was an experimental, randomized controlled study carried out over a period of three months (August to October 2009), with a sample size of 160 patients divided into four study groups of 40 patients each. Two monitoring strategies, namely an ARV adverse effect monitoring tool and a patient self-monitoring diary were developed and used for the identification and recording of adverse effects. The four study groups included a Control group, a Tool group, a Diary group and a Tool-Diary group. Willing patients, after signing an informed consent form, were randomly assigned to one of the four groups by participating health care workers at the study site. Data was retrieved from the patient files by the researcher. Descriptive statistical analysis of the findings of the study was conducted using SPSS®. One hundred and forty nine patients were included in the final data analysis. Of the 80 diaries handed out to patients, only 33 were returned and due to errors only 31 were suitable for analysis. Monitoring tools were completed and analysed for 36 patients. The tool was found to be more effective in identifying adverse effects of a physical nature (such as peripheral neuropathy and lipodystrophy) than the usual methods of monitoring employed by the clinic, whilst the diary, used alone, was found to be less effective. Use of the tool and diary combined resulted in the most significant identification and recording of central nervous system related adverse effects and physical adverse effects. However due to the low return rate of the diaries and the majority of the monitoring tool not being completed in many instances the results of this study may not be generalisable. The study results did however suggest that combining the tool and the diary methods of adverse effect identification, yielded the most favourable results when compared to each method alone. This may be attributed to the fact that the tool is useful in identifying objective symptoms and the diaries subjective symptoms, particularly in instances where the patients forget to report their symptoms to healthcare professional whilst at the clinic. The diaries were also reported to improve adherence for more than 90 percentage (n=31) of the patients. More research would be needed in order to verify the exact significance of the tool and the diary in identifying and recording adverse effects and symptoms of adverse effects.
- Full Text:
- Date Issued: 2010
- Authors: Mulinge, Florence Muthoni
- Date: 2010
- Subjects: Highly active antiretroviral therapy , Antiretroviral agents -- South Africa -- Uitenhage , HIV infections -- Treatment -- South Africa -- Uitenhage , AIDS (Disease) -- Treatment -- South Africa -- Uitenhage
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:10131 , http://hdl.handle.net/10948/1491 , Highly active antiretroviral therapy , Antiretroviral agents -- South Africa -- Uitenhage , HIV infections -- Treatment -- South Africa -- Uitenhage , AIDS (Disease) -- Treatment -- South Africa -- Uitenhage
- Description: South Africa, with an estimated 5.7 million people living with HIV, continues to have one of the largest epidemics in the world. The introduction of HAART resulted in prolonged and improved quality of life of many infected patients. However, adverse effects caused by these drugs have become a major concern as they affect the adherence of patients and in some cases even result in the death of patients. Although much research has been and is still being conducted in the area of understanding, preventing and management of ARV adverse effects, there is still a need for patients to be actively involved in self-monitoring for adverse effects. This will assist health care professionals in early identification of serious or potentially serious ARV effects. This study aimed at evaluating the usefulness of strategies developed and employed in the identification, recording and monitoring of adverse effects. The study was conducted with patients receiving HAART from a private HIV and AIDS clinic in Uitenhage, Eastern Cape, South Africa. The research project was approved by the Nelson Mandela Metropolitan University Research and Ethics Committee and the research site. This was an experimental, randomized controlled study carried out over a period of three months (August to October 2009), with a sample size of 160 patients divided into four study groups of 40 patients each. Two monitoring strategies, namely an ARV adverse effect monitoring tool and a patient self-monitoring diary were developed and used for the identification and recording of adverse effects. The four study groups included a Control group, a Tool group, a Diary group and a Tool-Diary group. Willing patients, after signing an informed consent form, were randomly assigned to one of the four groups by participating health care workers at the study site. Data was retrieved from the patient files by the researcher. Descriptive statistical analysis of the findings of the study was conducted using SPSS®. One hundred and forty nine patients were included in the final data analysis. Of the 80 diaries handed out to patients, only 33 were returned and due to errors only 31 were suitable for analysis. Monitoring tools were completed and analysed for 36 patients. The tool was found to be more effective in identifying adverse effects of a physical nature (such as peripheral neuropathy and lipodystrophy) than the usual methods of monitoring employed by the clinic, whilst the diary, used alone, was found to be less effective. Use of the tool and diary combined resulted in the most significant identification and recording of central nervous system related adverse effects and physical adverse effects. However due to the low return rate of the diaries and the majority of the monitoring tool not being completed in many instances the results of this study may not be generalisable. The study results did however suggest that combining the tool and the diary methods of adverse effect identification, yielded the most favourable results when compared to each method alone. This may be attributed to the fact that the tool is useful in identifying objective symptoms and the diaries subjective symptoms, particularly in instances where the patients forget to report their symptoms to healthcare professional whilst at the clinic. The diaries were also reported to improve adherence for more than 90 percentage (n=31) of the patients. More research would be needed in order to verify the exact significance of the tool and the diary in identifying and recording adverse effects and symptoms of adverse effects.
- Full Text:
- Date Issued: 2010
Immunological and molecular characterization of Cryptosporidium species in HIV-Positive and HIV-Negative diarrhoea patients in the Nkonkobe Municipality of the Eastern Cape Province of South Africa: a pilot study
- Authors: Etinosa, Omoruyi Beauty
- Date: 2010
- Subjects: Protozoa, Pathogenic , Pathogenic microorganisms -- Detection , Medical microbiology , HIV-positive persons , Cryptosporidium , Diarrhea , HIV-infections
- Language: English
- Type: Thesis , Masters , MSc (Biochemistry)
- Identifier: vital:11252 , http://hdl.handle.net/10353/392 , Protozoa, Pathogenic , Pathogenic microorganisms -- Detection , Medical microbiology , HIV-positive persons , Cryptosporidium , Diarrhea , HIV-infections
- Description: Cryptosporidiosis is an infection caused by Cryptosporidium; a protozoan parasite that infects the gastrointestinal tract. The infection is of major public health concern in both developed and developing countries. Faecal samples were collected from 160 in-patient adults, with complaint of diarrhoea, admitted at Victoria hospital in Alice, Nkonkobe Municipality. Twenty apparently healthy subjects were included as controls. All diarrhoea positive patients were interviewed to record socio-demographic information, water supply and animal contact. Initial screening was carried out by microscopy and ELISA to detect positive Cryptosporidium. Genomic DNA was extracted from microscopically positive samples and a PCR reaction was perform to amplify the (18S) SSUrRNA gene for further identification and epidemiology of Cryptosporidium. Data were analysed using Pearson‘s χ2 and Fisher‘s exact test to assess the univariate association between Cryptosporidium infection and the possible risk factors. Of the 180 subjects screened for cryptosporidial infection, Cryptosporidium antigen was detected in 122 giving an overall prevalence of 67.8 percent. In HIV-positive diarrhoea patients, prevalence increased with ages; between 31-43 (mean age 36.5 yr) and 70-82 (mean age 75.8 yr) had a higher prevalence (100 percent) of the antigen than 18-30 (mean age 23.2 yr) and 83-95 (mean age 88.8 yr) (50.0 percent) in HIV-positive diarrhoea patients (P > 0.05). In HIV-negative diarrhoea patients, prevalence was highest in the 18-30 (mean age 23.2 yr) (87.5 percent) and least (35.7 percent) in those aged 83-95 (mean age 88.8 yr) (P > 0.05). Cryptosporidium antigen was higher in females than in males. Of 115 females (mean age 46.7yr) who participated in the study, antigen was detected in 90 (78.2 percent) against 32 (71.1 percent) of 45 males (mean age 42.6yr). None of the 20 apparently healthy control subjects was found to be infected with Cryptosporidium. Cryptosporidium was detected in 27 HIV-positive and 97 HIV-negative diarrhoea patients by any one of the techniques. Antigen detection by ELISA 14 showed the highest positivity 96 (76.8 percent) in HIV- negative and 26 (74.3 percent) in HIV- positive diarrhoea patients. PCR detected eighty-nine (71.2 percent) cases in HIV-negative and 23 (65.7 percent) in HIV-positive patients with diarrhoea. Only 13 (37.1 percent) HIV-positive and 34 (27.2 percent) HIV-negative diarrhoea patients were found positive for Cryptosporidium by modified ZN. No significant difference was observed in sensitivity of antigen detection by ELISA and PCR (96.9 percent) in HIV-negative diarrhoea patients, respectively. Specificity of the staining technique was 88.9 percent in HIV-positive and 96.6 percent in HIV-negative diarrhoea patients. No significant difference was found in specificity of antigen detection by ELISA and PCR in HIV-positive and HIV-negative diarrhoea patients, respectively. Positive predictive value of ZN staining in both HIV-positive and HIV-negative diarrhoea patients (92.3 and 96.9 percent) was statistically higher than ELISA and PCR. No significant difference was observed in negative predictive value of ZN technique for detection of Cryptosporidium between HIV-positive and HIV- negative diarrhoea patients. Differences found in prevalence rates due to water source, suggest that the high infection rates of specific groups are associated with their exposure to the contaminated water supply. The results indicate that Cryptosporidium infection is highly prevalent in adult faecal specimens in the Nkonkobe Municipality, an indication of active infection that is likely to emerge as major human pathogen in this location due to socioeconomic changes which favour transmission. However, sequencing analysis is required to differentiate between Cryptosporidium genotypes in the various outbreaks
- Full Text:
- Date Issued: 2010
- Authors: Etinosa, Omoruyi Beauty
- Date: 2010
- Subjects: Protozoa, Pathogenic , Pathogenic microorganisms -- Detection , Medical microbiology , HIV-positive persons , Cryptosporidium , Diarrhea , HIV-infections
- Language: English
- Type: Thesis , Masters , MSc (Biochemistry)
- Identifier: vital:11252 , http://hdl.handle.net/10353/392 , Protozoa, Pathogenic , Pathogenic microorganisms -- Detection , Medical microbiology , HIV-positive persons , Cryptosporidium , Diarrhea , HIV-infections
- Description: Cryptosporidiosis is an infection caused by Cryptosporidium; a protozoan parasite that infects the gastrointestinal tract. The infection is of major public health concern in both developed and developing countries. Faecal samples were collected from 160 in-patient adults, with complaint of diarrhoea, admitted at Victoria hospital in Alice, Nkonkobe Municipality. Twenty apparently healthy subjects were included as controls. All diarrhoea positive patients were interviewed to record socio-demographic information, water supply and animal contact. Initial screening was carried out by microscopy and ELISA to detect positive Cryptosporidium. Genomic DNA was extracted from microscopically positive samples and a PCR reaction was perform to amplify the (18S) SSUrRNA gene for further identification and epidemiology of Cryptosporidium. Data were analysed using Pearson‘s χ2 and Fisher‘s exact test to assess the univariate association between Cryptosporidium infection and the possible risk factors. Of the 180 subjects screened for cryptosporidial infection, Cryptosporidium antigen was detected in 122 giving an overall prevalence of 67.8 percent. In HIV-positive diarrhoea patients, prevalence increased with ages; between 31-43 (mean age 36.5 yr) and 70-82 (mean age 75.8 yr) had a higher prevalence (100 percent) of the antigen than 18-30 (mean age 23.2 yr) and 83-95 (mean age 88.8 yr) (50.0 percent) in HIV-positive diarrhoea patients (P > 0.05). In HIV-negative diarrhoea patients, prevalence was highest in the 18-30 (mean age 23.2 yr) (87.5 percent) and least (35.7 percent) in those aged 83-95 (mean age 88.8 yr) (P > 0.05). Cryptosporidium antigen was higher in females than in males. Of 115 females (mean age 46.7yr) who participated in the study, antigen was detected in 90 (78.2 percent) against 32 (71.1 percent) of 45 males (mean age 42.6yr). None of the 20 apparently healthy control subjects was found to be infected with Cryptosporidium. Cryptosporidium was detected in 27 HIV-positive and 97 HIV-negative diarrhoea patients by any one of the techniques. Antigen detection by ELISA 14 showed the highest positivity 96 (76.8 percent) in HIV- negative and 26 (74.3 percent) in HIV- positive diarrhoea patients. PCR detected eighty-nine (71.2 percent) cases in HIV-negative and 23 (65.7 percent) in HIV-positive patients with diarrhoea. Only 13 (37.1 percent) HIV-positive and 34 (27.2 percent) HIV-negative diarrhoea patients were found positive for Cryptosporidium by modified ZN. No significant difference was observed in sensitivity of antigen detection by ELISA and PCR (96.9 percent) in HIV-negative diarrhoea patients, respectively. Specificity of the staining technique was 88.9 percent in HIV-positive and 96.6 percent in HIV-negative diarrhoea patients. No significant difference was found in specificity of antigen detection by ELISA and PCR in HIV-positive and HIV-negative diarrhoea patients, respectively. Positive predictive value of ZN staining in both HIV-positive and HIV-negative diarrhoea patients (92.3 and 96.9 percent) was statistically higher than ELISA and PCR. No significant difference was observed in negative predictive value of ZN technique for detection of Cryptosporidium between HIV-positive and HIV- negative diarrhoea patients. Differences found in prevalence rates due to water source, suggest that the high infection rates of specific groups are associated with their exposure to the contaminated water supply. The results indicate that Cryptosporidium infection is highly prevalent in adult faecal specimens in the Nkonkobe Municipality, an indication of active infection that is likely to emerge as major human pathogen in this location due to socioeconomic changes which favour transmission. However, sequencing analysis is required to differentiate between Cryptosporidium genotypes in the various outbreaks
- Full Text:
- Date Issued: 2010
Impact assessment of local economic development in the Amathole district municipality with special reference to agriculture
- Authors: Mpengu, Mbuyiseli
- Date: 2010
- Subjects: Sustainable development -- South Africa -- Eastern Cape , Agriculture and state -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8203 , http://hdl.handle.net/10948/1198 , Sustainable development -- South Africa -- Eastern Cape , Agriculture and state -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Description: In this study, Local Economic Development (LED) is defined as an outcome of processes aimed at building up the capacity of local areas for sustainable economic development. The study assesses whether LED interventions, especially agricultural programmes, improve the livelihoods of poor communities in the Amathole District Municipality. Data was collected by use of both qualitative and quantitative research methods through interviews and questionnaires, respectively. Probability and non-probability sampling techniques were used to identify the research sample from the target population. These were further broken down into stratified, purposive and snowball sampling to enable the researcher to select specific municipalities, councillors, officials and stakeholders who participated in the study. Budgetary constraints, staff shortages and lack of required skills/ expertise were identified as the main challenges facing the district. The latter makes it difficult for the municipality to effectively implement sound LED programmes. Consequently, LED benefits are minimal. It is, therefore, recommendable for the municipality to seek other means of generating and boosting their financial viability through partnerships and private sector investments. This in turn will generate revenue for the municipality and ensure economic development in the district, thereby making a meaningful contribution towards the realization of a goal for “a better life for all”.
- Full Text:
- Date Issued: 2010
- Authors: Mpengu, Mbuyiseli
- Date: 2010
- Subjects: Sustainable development -- South Africa -- Eastern Cape , Agriculture and state -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8203 , http://hdl.handle.net/10948/1198 , Sustainable development -- South Africa -- Eastern Cape , Agriculture and state -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Description: In this study, Local Economic Development (LED) is defined as an outcome of processes aimed at building up the capacity of local areas for sustainable economic development. The study assesses whether LED interventions, especially agricultural programmes, improve the livelihoods of poor communities in the Amathole District Municipality. Data was collected by use of both qualitative and quantitative research methods through interviews and questionnaires, respectively. Probability and non-probability sampling techniques were used to identify the research sample from the target population. These were further broken down into stratified, purposive and snowball sampling to enable the researcher to select specific municipalities, councillors, officials and stakeholders who participated in the study. Budgetary constraints, staff shortages and lack of required skills/ expertise were identified as the main challenges facing the district. The latter makes it difficult for the municipality to effectively implement sound LED programmes. Consequently, LED benefits are minimal. It is, therefore, recommendable for the municipality to seek other means of generating and boosting their financial viability through partnerships and private sector investments. This in turn will generate revenue for the municipality and ensure economic development in the district, thereby making a meaningful contribution towards the realization of a goal for “a better life for all”.
- Full Text:
- Date Issued: 2010
Impact of access to free basic electricity on households' poverty in Buffalo City Municipality in the Eastern Cape
- Authors: Mvondo, Jephthe M
- Date: 2010
- Subjects: Household surveys -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Quality of life -- South Africa -- Eastern Cape , Electric utilities -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sc (Dev)
- Identifier: vital:11419 , http://hdl.handle.net/10353/280 , Household surveys -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Quality of life -- South Africa -- Eastern Cape , Electric utilities -- South Africa -- Eastern Cape
- Description: The study was premised on the truism that men have historically served in higher echelons of organizational management structures and women are under-represented. The principal objective was to explore the constraints faced by women in accessing higher leadership and senior management positions in public, private and non-governmental organisations in Zimbabwe. This study adopted the triangulation method, that is, qualitative and quantitative approaches. These mixed research methods, were upgraded by the feminist research methodologies, thereby making a contribution in the field of research. The study found out that the constraints that mostly hinder women from accessing leadership and senior management positions in public, private and NGOs were cultural practices, which represent levels of power and control that in turn hinder reforms; and women's socialisation into feminised roles. The study also found out that in most organisations, most females work under male leadership, and this traditional organisational culture, needs to be deconstructed and reversed in order to achieve gender equality. The study recommended for a human centric and integrated organizational management strategy for public, private and NGOs in Zimbabwe. The adoption of a human centric and integrated management approach should aim at gender equity and reduce women's under-representation. A human centred organizational culture has to be practiced, that would create organisational ethos that guide organizational management. An integrated organizational management approach should integrate all systems and processes into one complete framework, enabling people to work as a single unit, unified by organizational goals, shared vision and common values. The system should depend on a balanced mix of the masculine and feminine attributes. The approach should put its weight towards adoption of measures to attract, advance and empower women so as to benefit from their qualifications, experience and talent in a highly competitive environment.
- Full Text:
- Date Issued: 2010
- Authors: Mvondo, Jephthe M
- Date: 2010
- Subjects: Household surveys -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Quality of life -- South Africa -- Eastern Cape , Electric utilities -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M Soc Sc (Dev)
- Identifier: vital:11419 , http://hdl.handle.net/10353/280 , Household surveys -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Quality of life -- South Africa -- Eastern Cape , Electric utilities -- South Africa -- Eastern Cape
- Description: The study was premised on the truism that men have historically served in higher echelons of organizational management structures and women are under-represented. The principal objective was to explore the constraints faced by women in accessing higher leadership and senior management positions in public, private and non-governmental organisations in Zimbabwe. This study adopted the triangulation method, that is, qualitative and quantitative approaches. These mixed research methods, were upgraded by the feminist research methodologies, thereby making a contribution in the field of research. The study found out that the constraints that mostly hinder women from accessing leadership and senior management positions in public, private and NGOs were cultural practices, which represent levels of power and control that in turn hinder reforms; and women's socialisation into feminised roles. The study also found out that in most organisations, most females work under male leadership, and this traditional organisational culture, needs to be deconstructed and reversed in order to achieve gender equality. The study recommended for a human centric and integrated organizational management strategy for public, private and NGOs in Zimbabwe. The adoption of a human centric and integrated management approach should aim at gender equity and reduce women's under-representation. A human centred organizational culture has to be practiced, that would create organisational ethos that guide organizational management. An integrated organizational management approach should integrate all systems and processes into one complete framework, enabling people to work as a single unit, unified by organizational goals, shared vision and common values. The system should depend on a balanced mix of the masculine and feminine attributes. The approach should put its weight towards adoption of measures to attract, advance and empower women so as to benefit from their qualifications, experience and talent in a highly competitive environment.
- Full Text:
- Date Issued: 2010
Impact of in-field rainwater harvesting technology on household food security: a case of Guquka and Khayalethu villages in Central Eastern Cape Province
- Hlanganise, Yoliswa Happiness
- Authors: Hlanganise, Yoliswa Happiness
- Date: 2010
- Subjects: Water consumption -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Water harvesting -- South Africa -- Eastern Cape , Food supply -- South Africa -- Eastern Cape , Sustainable agriculture -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc Agric (Agricultural Economics)
- Identifier: vital:11179 , http://hdl.handle.net/10353/352 , Water consumption -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Water harvesting -- South Africa -- Eastern Cape , Food supply -- South Africa -- Eastern Cape , Sustainable agriculture -- South Africa -- Eastern Cape
- Description: The aim of this investigation was to assess the impact of the In-Field Rainwater Harvesting technology on household food security in the study area. The study was conducted in Nkonkobe Local Municipality of the Amathole District Municipality in central Eastern Cape Province. The areas under investigation are Guquka and Khayaletu villages of the Thyume Valley, which is located about 30 kilometres north of Alice. The method used to assess the impact of the IRWH on household food security was a pair wise comparison method. During September 2009, there were 60 (34 in Guquka and 26 in Khayaletu) households who adopted the technology in home gardens. In order to get a clear picture of the impact of the technology on food security, a decision was taken to assess both the project members and non-project members, hence the pairwise comparison method. The non-project members (also 60 households) were selected randomly from those who were interviewed during the situation analysis in 2004. Five indicators were used to assess household food security. These were household income, expenditure on food, diet diversity, energy-protein intakes, and micro-nutrient intakes (Vitamin A, C and Iron). The income and expenditure data were collected from the 120 households. However, the detailed food data were collected from selected cases from both groups at different times (seasons) of the year. A case study approach was employed in data collection. A total of 12 cases (six households per village) were selected for this investigation. These were selected mainly according to the degree of poverty. The total of six households from each village comprised three project members and three non-members i.e. one from each poverty class (non- poor, poor and ultra-poor) in both categories. The data on the kinds of food products consumed by households was gathered using the food account method (FAM). The food consumed was then analysed for nutrient adequacy. The main findings of this investigation show the IRWH technology to have a positive impact on food security and nutrition of the project members. The technology made significant contributions to the amount of energy and vitamins A and C consumed by households especially during wet seasons. Substantial contributions of garden produce were noted among the project members. However, these contributions were not enough to ensure household food security. The results indicate that there are nutritional problems in the study area. Firstly, there is protein- v energy malnutrition mainly affecting the poor and the ultra-poor households. Secondly, there is hidden hunger affecting all poverty categories, even the non-poor households. This is mainly demonstrated by poor diet quality i.e. diet that lacks essential nutrients identified
- Full Text:
- Date Issued: 2010
- Authors: Hlanganise, Yoliswa Happiness
- Date: 2010
- Subjects: Water consumption -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Water harvesting -- South Africa -- Eastern Cape , Food supply -- South Africa -- Eastern Cape , Sustainable agriculture -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc Agric (Agricultural Economics)
- Identifier: vital:11179 , http://hdl.handle.net/10353/352 , Water consumption -- South Africa -- Eastern Cape , Poverty -- South Africa -- Eastern Cape , Water harvesting -- South Africa -- Eastern Cape , Food supply -- South Africa -- Eastern Cape , Sustainable agriculture -- South Africa -- Eastern Cape
- Description: The aim of this investigation was to assess the impact of the In-Field Rainwater Harvesting technology on household food security in the study area. The study was conducted in Nkonkobe Local Municipality of the Amathole District Municipality in central Eastern Cape Province. The areas under investigation are Guquka and Khayaletu villages of the Thyume Valley, which is located about 30 kilometres north of Alice. The method used to assess the impact of the IRWH on household food security was a pair wise comparison method. During September 2009, there were 60 (34 in Guquka and 26 in Khayaletu) households who adopted the technology in home gardens. In order to get a clear picture of the impact of the technology on food security, a decision was taken to assess both the project members and non-project members, hence the pairwise comparison method. The non-project members (also 60 households) were selected randomly from those who were interviewed during the situation analysis in 2004. Five indicators were used to assess household food security. These were household income, expenditure on food, diet diversity, energy-protein intakes, and micro-nutrient intakes (Vitamin A, C and Iron). The income and expenditure data were collected from the 120 households. However, the detailed food data were collected from selected cases from both groups at different times (seasons) of the year. A case study approach was employed in data collection. A total of 12 cases (six households per village) were selected for this investigation. These were selected mainly according to the degree of poverty. The total of six households from each village comprised three project members and three non-members i.e. one from each poverty class (non- poor, poor and ultra-poor) in both categories. The data on the kinds of food products consumed by households was gathered using the food account method (FAM). The food consumed was then analysed for nutrient adequacy. The main findings of this investigation show the IRWH technology to have a positive impact on food security and nutrition of the project members. The technology made significant contributions to the amount of energy and vitamins A and C consumed by households especially during wet seasons. Substantial contributions of garden produce were noted among the project members. However, these contributions were not enough to ensure household food security. The results indicate that there are nutritional problems in the study area. Firstly, there is protein- v energy malnutrition mainly affecting the poor and the ultra-poor households. Secondly, there is hidden hunger affecting all poverty categories, even the non-poor households. This is mainly demonstrated by poor diet quality i.e. diet that lacks essential nutrients identified
- Full Text:
- Date Issued: 2010
Impact of new media technologies on the production of economics news in South Africa : a case study of Fin24.com (www.fin24.com)
- Authors: Phakathi, Bekezela
- Date: 2010
- Subjects: Mass media -- Technological innovations -- South Africa -- Case studies Mass media and technology -- South Africa -- Case studies Journalism, Commercial -- South Africa -- Case studies Online journalism -- South Africa -- Case studies Digital media -- South Africa -- Case studies Communication and technology -- South Africa -- Case studies Social networks -- South Africa -- Case studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3510 , http://hdl.handle.net/10962/d1007631
- Description: New media technology continues to provide journalists with sophisticated tools that are changing news processing and gathering. Economics journalists in particular have grasped the possibilities offered by new media technologies. Thus, this paper offers a theoretical and practical look at how new media technologies have impacted the production and processing of economics news in South Africa, with a particular focus on Fin24.com which is South Africa's biggest online economics news publication. Using qualitative research methods and the case-study approach, this thesis documents the impact of new media technologies on the production of economics news. It draws on Witschge and Nygren's (2009) framework which describes how new media technologies change the nature in which news is produced and processed. New media technologies in this study will refer to the Internet, particularly search engines like Google, social networking sites such as Twitter and Facebook, Blogs as well as mobile telephony. Economics journalism will here refer to all coverage of economics and business-related news. This is because the case study (Fin24.com) covers both business and economics journalism by strict definition. Findings reveal that these new media technologies have not only changed economics newsgathering and processing but also journalistic routines. The findings generally show that new media technologies make it easier for economics journalists to produce the news quickly and efficiently. Indeed, the most distinguishing characteristic of new media is its overall speed, which is both challenging and attractive. The findings also reveal that new media technologies within a newsroom can be problematic in a number of ways, mainly raising issues of accuracy and credibility thus challenging the profession of economics journalism more than ever.
- Full Text:
- Date Issued: 2010
- Authors: Phakathi, Bekezela
- Date: 2010
- Subjects: Mass media -- Technological innovations -- South Africa -- Case studies Mass media and technology -- South Africa -- Case studies Journalism, Commercial -- South Africa -- Case studies Online journalism -- South Africa -- Case studies Digital media -- South Africa -- Case studies Communication and technology -- South Africa -- Case studies Social networks -- South Africa -- Case studies
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3510 , http://hdl.handle.net/10962/d1007631
- Description: New media technology continues to provide journalists with sophisticated tools that are changing news processing and gathering. Economics journalists in particular have grasped the possibilities offered by new media technologies. Thus, this paper offers a theoretical and practical look at how new media technologies have impacted the production and processing of economics news in South Africa, with a particular focus on Fin24.com which is South Africa's biggest online economics news publication. Using qualitative research methods and the case-study approach, this thesis documents the impact of new media technologies on the production of economics news. It draws on Witschge and Nygren's (2009) framework which describes how new media technologies change the nature in which news is produced and processed. New media technologies in this study will refer to the Internet, particularly search engines like Google, social networking sites such as Twitter and Facebook, Blogs as well as mobile telephony. Economics journalism will here refer to all coverage of economics and business-related news. This is because the case study (Fin24.com) covers both business and economics journalism by strict definition. Findings reveal that these new media technologies have not only changed economics newsgathering and processing but also journalistic routines. The findings generally show that new media technologies make it easier for economics journalists to produce the news quickly and efficiently. Indeed, the most distinguishing characteristic of new media is its overall speed, which is both challenging and attractive. The findings also reveal that new media technologies within a newsroom can be problematic in a number of ways, mainly raising issues of accuracy and credibility thus challenging the profession of economics journalism more than ever.
- Full Text:
- Date Issued: 2010
Impact pf provincial local government support for effective implementation of PMS in municipalities (Lukhanji municipality)
- Sidinana, Ngenanimazizi Orsmond
- Authors: Sidinana, Ngenanimazizi Orsmond
- Date: 2010
- Subjects: Benchmarking (Management) , Local government
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9159 , http://hdl.handle.net/10948/d1020000
- Description: One of the more frequently heard criticisms of local government is that it is not delivering the required services or it is not delivering an efficient standard of service. Performance management for local government contributes to creating a performance culture in the public service at municipal level. Performance management is a mechanism that is used to ensure that the municipality is doing its work and delivering on its mandate. The SALGA HRD Policy Conference held in March 2003 endorsed the spirit of the relevant legislation on performance management in municipalities. As the employee body and the only recognized voice of municipalities in the country, SALGA has been of the view that the legislative imperative placed on municipalities to be developmental and performance orientated cannot be overly emphasized. Concomitant with the legislative imperative has been the political will or unwavering political commitment to ensure that municipal administrations are accountable to their respective councils, and by extension, the communities they serve. The successful implementation of the Performance Management System at all municipalities will certainly serve as a yardstick in objectively measuring the performance of municipal and provincial local government officials. It is believed that the ongoing measurement of performance will inevitably lead to better delivery of services to our people. The Constitution of South Africa places a developmental mandate on local governments, with the express purpose of them providing effective and efficient services to their communities and to promote local social and economic development. Further to this, the Municipal Systems Act of 2000 provides a legislative framework for municipalities to embark on integrated development planning. Thus all municipalities require an Integrated Development Plan (lDP) to be in place in order to fully realize their objectives as set out in Section 152 of the Constitution. In the interpretation of the legislation, it is clear that the Council (the political body of the municipality) is held responsible to ensure that its municipality has an lDP and PMS in place. Thus both the political principal and the leadership of a municipality are, by law, required to fulfil their obligations in implementing the PMS, while the provincial local government department is charged with the obligation to ensure that such objectives by municipalities are realized by way of providing financial and human capital assistance. Since the lDP and PMS have been legislated in such a manner, it thus becomes legally imperative that municipalities comply with the legislation. The Auditor General is thus required to audit a municipality within this context. Failure to comply may entail certain legal repercussions. Generally, there has been a drive to inculcate improved performance in all three spheres of government. However, it becomes integral that municipalities are performance oriented, especially since it is the sphere of government closest to the grass-roots levels where the real impact of service delivery is experienced. There is undoubtedly a link between lDP and PM. However, it has been observed that both in municipalities and provincial local government there is no synergy between these two components and they tend to operate in isolation of each other. Logically, the scorecards of the organisation and individuals should be derived from the municipality's IDP; however this is not always the case. It is also evident that both the municipality and provincial local government approaches the two issues as different disciplines. Having said this, it is important for SALGA and Provincial Local Government to encourage and ensure better alignment of lDP and PMS in both the province and municipalities.
- Full Text:
- Date Issued: 2010
- Authors: Sidinana, Ngenanimazizi Orsmond
- Date: 2010
- Subjects: Benchmarking (Management) , Local government
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:9159 , http://hdl.handle.net/10948/d1020000
- Description: One of the more frequently heard criticisms of local government is that it is not delivering the required services or it is not delivering an efficient standard of service. Performance management for local government contributes to creating a performance culture in the public service at municipal level. Performance management is a mechanism that is used to ensure that the municipality is doing its work and delivering on its mandate. The SALGA HRD Policy Conference held in March 2003 endorsed the spirit of the relevant legislation on performance management in municipalities. As the employee body and the only recognized voice of municipalities in the country, SALGA has been of the view that the legislative imperative placed on municipalities to be developmental and performance orientated cannot be overly emphasized. Concomitant with the legislative imperative has been the political will or unwavering political commitment to ensure that municipal administrations are accountable to their respective councils, and by extension, the communities they serve. The successful implementation of the Performance Management System at all municipalities will certainly serve as a yardstick in objectively measuring the performance of municipal and provincial local government officials. It is believed that the ongoing measurement of performance will inevitably lead to better delivery of services to our people. The Constitution of South Africa places a developmental mandate on local governments, with the express purpose of them providing effective and efficient services to their communities and to promote local social and economic development. Further to this, the Municipal Systems Act of 2000 provides a legislative framework for municipalities to embark on integrated development planning. Thus all municipalities require an Integrated Development Plan (lDP) to be in place in order to fully realize their objectives as set out in Section 152 of the Constitution. In the interpretation of the legislation, it is clear that the Council (the political body of the municipality) is held responsible to ensure that its municipality has an lDP and PMS in place. Thus both the political principal and the leadership of a municipality are, by law, required to fulfil their obligations in implementing the PMS, while the provincial local government department is charged with the obligation to ensure that such objectives by municipalities are realized by way of providing financial and human capital assistance. Since the lDP and PMS have been legislated in such a manner, it thus becomes legally imperative that municipalities comply with the legislation. The Auditor General is thus required to audit a municipality within this context. Failure to comply may entail certain legal repercussions. Generally, there has been a drive to inculcate improved performance in all three spheres of government. However, it becomes integral that municipalities are performance oriented, especially since it is the sphere of government closest to the grass-roots levels where the real impact of service delivery is experienced. There is undoubtedly a link between lDP and PM. However, it has been observed that both in municipalities and provincial local government there is no synergy between these two components and they tend to operate in isolation of each other. Logically, the scorecards of the organisation and individuals should be derived from the municipality's IDP; however this is not always the case. It is also evident that both the municipality and provincial local government approaches the two issues as different disciplines. Having said this, it is important for SALGA and Provincial Local Government to encourage and ensure better alignment of lDP and PMS in both the province and municipalities.
- Full Text:
- Date Issued: 2010
Implementation of intravenous to oral antibiotic switch therapy guidelines in the general medical wards of a tertiary level hospital
- Authors: Van Niekerk, Anida
- Date: 2010
- Subjects: Antibiotics -- Administration
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:10160 , http://hdl.handle.net/10948/1325 , http://hdl.handle.net/10948/d1012901 , Antibiotics -- Administration
- Description: The overuse of antibiotics and consequent resistance is a common problem in medical practice worldwide. Switch therapy is a technique that can be applied to streamline antibiotic therapy reducing unnecessary prolonged Intravenous (IV) antibiotic therapy. Antibiotic switch therapy has several other benefits such as: decreasing length of hospital stay; decreasing the incidence of adverse events associated with the administration of IV antibiotics; decreasing direct and indirect hospitalisation costs while improving patients’ comfort and mobility; and decreasing the risk of acquiring nosocomial infections. Certain elements are required to make the implementation of any guideline, including a switch therapy guideline, a success and probably one of the most important is the support from a motivated multidisciplinary team. The role of such a team, in the South African context, would be filled by the Pharmacy and Therapeutics Committee (PTC). In addition, to make a guideline successful it should be continuously implemented. This responsibility traditionally falls to a pharmacist. In the United Kingdom (UK) and the United States of America (USA) pharmacists are used to promote the appropriate use of antibiotics in hospitals as this has shown to have several economic advantages. The objectives of the study were: to determine, by means of a survey, whether guidelines for IV to oral switch were employed in South African regional, tertiary and national government hospitals; to design and implement an IV to oral antibiotic switch therapy (IVOST) guideline for a local public sector tertiary level hospital; to evaluate the effectiveness of guideline implementation; and to capture, via a questionnaire, the perceptions of prescribers regarding antibiotic prescribing, including switch therapy. The Survey of Current IV Switch Therapy Practice Questionnaire was distributed to Responsible Pharmacists at regional, provincial tertiary and national central government hospitals to determine whether IVOST guidelines were employed in South African government hospitals. Following the survey, an IVOST Guideline was designed by the researcher in consultation with the Department of Medicine and the Department of Pharmacy. The IVOST Guideline was implemented following approval by the PTC at a local tertiary level government hospital. A presentation was held for prescribers, guideline documents were distributed, posters were placed in the medical wards and the ward pharmacist/researcher integrated the guideline into daily practice by placing “reminder stickers” in patient medical folders. A pre-implementation audit and two post-implementation audits, each consisting of 150 patient medical records, were conducted and compared to determine the effect of IVOST guideline implementation on prescribing patterns and to determine whether any changes could be sustained. The Prescriber Antibiotic Survey was then conducted to capture the perceptions of prescribers regarding antibiotic therapy, including switch therapy.
- Full Text:
- Date Issued: 2010
- Authors: Van Niekerk, Anida
- Date: 2010
- Subjects: Antibiotics -- Administration
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:10160 , http://hdl.handle.net/10948/1325 , http://hdl.handle.net/10948/d1012901 , Antibiotics -- Administration
- Description: The overuse of antibiotics and consequent resistance is a common problem in medical practice worldwide. Switch therapy is a technique that can be applied to streamline antibiotic therapy reducing unnecessary prolonged Intravenous (IV) antibiotic therapy. Antibiotic switch therapy has several other benefits such as: decreasing length of hospital stay; decreasing the incidence of adverse events associated with the administration of IV antibiotics; decreasing direct and indirect hospitalisation costs while improving patients’ comfort and mobility; and decreasing the risk of acquiring nosocomial infections. Certain elements are required to make the implementation of any guideline, including a switch therapy guideline, a success and probably one of the most important is the support from a motivated multidisciplinary team. The role of such a team, in the South African context, would be filled by the Pharmacy and Therapeutics Committee (PTC). In addition, to make a guideline successful it should be continuously implemented. This responsibility traditionally falls to a pharmacist. In the United Kingdom (UK) and the United States of America (USA) pharmacists are used to promote the appropriate use of antibiotics in hospitals as this has shown to have several economic advantages. The objectives of the study were: to determine, by means of a survey, whether guidelines for IV to oral switch were employed in South African regional, tertiary and national government hospitals; to design and implement an IV to oral antibiotic switch therapy (IVOST) guideline for a local public sector tertiary level hospital; to evaluate the effectiveness of guideline implementation; and to capture, via a questionnaire, the perceptions of prescribers regarding antibiotic prescribing, including switch therapy. The Survey of Current IV Switch Therapy Practice Questionnaire was distributed to Responsible Pharmacists at regional, provincial tertiary and national central government hospitals to determine whether IVOST guidelines were employed in South African government hospitals. Following the survey, an IVOST Guideline was designed by the researcher in consultation with the Department of Medicine and the Department of Pharmacy. The IVOST Guideline was implemented following approval by the PTC at a local tertiary level government hospital. A presentation was held for prescribers, guideline documents were distributed, posters were placed in the medical wards and the ward pharmacist/researcher integrated the guideline into daily practice by placing “reminder stickers” in patient medical folders. A pre-implementation audit and two post-implementation audits, each consisting of 150 patient medical records, were conducted and compared to determine the effect of IVOST guideline implementation on prescribing patterns and to determine whether any changes could be sustained. The Prescriber Antibiotic Survey was then conducted to capture the perceptions of prescribers regarding antibiotic therapy, including switch therapy.
- Full Text:
- Date Issued: 2010
Implementation of novel flow cytometric methods to assess the in vitro antidiabetic mechanism of a Sutherlandia Frutescens extract
- Authors: Elliot, Gayle Pamela
- Date: 2010
- Subjects: Insulin resistance -- South Africa , Insulin -- Therapeutic use -- South Africa , Medicinal plants -- South Africa , Non-insulin-dependent diabetes -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10304 , http://hdl.handle.net/10948/1439 , Insulin resistance -- South Africa , Insulin -- Therapeutic use -- South Africa , Medicinal plants -- South Africa , Non-insulin-dependent diabetes -- South Africa
- Description: The ability of insulin to stimulate glucose uptake into muscle and adipose tissue is central to the maintenance of whole-body glucose homeostasis. Deregulation of insulin action manifests itself as insulin resistance, a key component of type 2 diabetes. Insulin resistance is also observed in HIV patients receiving protease inhibitors. An agent that can reversibly induce an insulin-resistant state would be a very useful tool in developing model systems that mimic the pathogenesis of type 2 diabetes. Insulin resistance can arise from defects in insulin signal transduction, changes in the expression of proteins or genes that are targets of insulin action, cross talk from other hormonal systems or metabolic abnormalities. Deterioration of the insulin-receptor-signalling pathway at different levels leading to decreased levels of signalling pathway intermediates and/or decreased activation through phosphorylation accounts for the evolution from an insulin-resistant state to type 2 diabetes. In addition, defects in GLUT4 glucose transporter translocation are observed, further fuelling impairments in skeletal muscle glucose uptake. Levels of insulin-induced GLUT4 translocation in the skeletal muscle of type 2 diabetic patients are typically reduced by 90%. Many cellular pathways & their intermediates are in some way or another linked to insulin signalling. This study focused on three of these namely the PI3-kinase/Akt pathway, the Mitogen Activated Protein Kinase (MAPK) cascade and the AMP Kinase pathway, with successful monitoring of the PI3-K pathway. Investigations involved observing and evaluating the effects of various compounds as well as an indigenous medicinal plant, Sutherlandia frutescens on the activities of key insulin signalling pathway intermediates within the three fore mentioned pathways including Akt, AMPK and MEK1/2 as well as membrane surface GLUT4 levels. Scientific research has in the past leant heavily on Western blotting as the method of choice for gaining vital information relating to signal transduction pathways, however for research into cellular mechanisms the negatives of this method outweigh the positives. The drawbacks include a need for large amount of cells, multiple washing steps which may be disadvantageous to any weak and transient interactions as well as lysing of cells which may interfere with the maintenance of the subcellular localisation of a specific signalling event. Based on these, the need for a better method in terms of speed & reliability to monitor phosphorylation states of signal transduction pathway intermediates & GLUT4 translocation was evident and was one VII of the main aims & successes of this study. The method created used the mouse muscle cell line C2C12 in conjunction with the quick, sensitive method of flow cytometry which allowed us to monitor these processes in these cells through immune-labelling. Adherent cell cultures such as the C2C12 cell line pose the problem of possible damage to plasma membrane receptors (including insulin receptors) during harvesting to obtain a cell suspension for flow cytometry. We however used C2C12 mouse myocytes to optimize a method yielding insulin responsive cells in suspension that were successfully used for flow cytometry after immunelabelling of insulin signalling intermediates. Insulin (0.1μM) significantly raised the levels of both P-Akt and GLUT4 above basal levels. This effect was shown to be dose dependent. At a concentration of 50μg/ml, Sutherlandia frutescens was able to act as an insulin-mimetic in terms of its ability to increase P-Akt levels, GLUT4 translocation and glucose utilisation in an acute manner. These increases could be reduced with the addition of wortmannin, a PI3-K inhibitor. Therefore, these results suggest the mechanism of the plant extract’s insulin-like activity may be in part due to the activation of the insulin signalling pathway leading to GLUT4 translocation, which involves the phosphorylation of insulin receptor- and subsequent PI3-K activity, leading to P-Akt activity. These results provide further evidence of this plant extract’s anti-diabetic potential. The effect of Sutherlandia frutescens on insulin secretion, calcium signalling and proliferation in INS-1 rat pancreatic cells was also investigated and it was found to increase the activities of all of these processes. However no change in the levels of GLUT2 glucose transporter was seen. Ritonavir is prescribed by the South African Department of Health in co-formulation with other protease inhibitors within its second regime in the treatment of HIV and AIDS. Using C2C12 cells, ritonavir decreased glucose uptake acutely and had no effect on GLUT4 translocation however surprisingly increased P-Akt levels. In conclusion, it was found that Sutherlandia frutescens has antidiabetic benefits, diverse in nature depending on tissue type as well as length of time administered. The establishment of novel flow cytometry techniques to assess antidiabetic properties using in vitro cell culture was achieved. These methods will be useful in the future for the assessment of insulin sensitivity and in the identification of novel compounds that stimulate the insulin signalling pathways.
- Full Text:
- Date Issued: 2010
- Authors: Elliot, Gayle Pamela
- Date: 2010
- Subjects: Insulin resistance -- South Africa , Insulin -- Therapeutic use -- South Africa , Medicinal plants -- South Africa , Non-insulin-dependent diabetes -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10304 , http://hdl.handle.net/10948/1439 , Insulin resistance -- South Africa , Insulin -- Therapeutic use -- South Africa , Medicinal plants -- South Africa , Non-insulin-dependent diabetes -- South Africa
- Description: The ability of insulin to stimulate glucose uptake into muscle and adipose tissue is central to the maintenance of whole-body glucose homeostasis. Deregulation of insulin action manifests itself as insulin resistance, a key component of type 2 diabetes. Insulin resistance is also observed in HIV patients receiving protease inhibitors. An agent that can reversibly induce an insulin-resistant state would be a very useful tool in developing model systems that mimic the pathogenesis of type 2 diabetes. Insulin resistance can arise from defects in insulin signal transduction, changes in the expression of proteins or genes that are targets of insulin action, cross talk from other hormonal systems or metabolic abnormalities. Deterioration of the insulin-receptor-signalling pathway at different levels leading to decreased levels of signalling pathway intermediates and/or decreased activation through phosphorylation accounts for the evolution from an insulin-resistant state to type 2 diabetes. In addition, defects in GLUT4 glucose transporter translocation are observed, further fuelling impairments in skeletal muscle glucose uptake. Levels of insulin-induced GLUT4 translocation in the skeletal muscle of type 2 diabetic patients are typically reduced by 90%. Many cellular pathways & their intermediates are in some way or another linked to insulin signalling. This study focused on three of these namely the PI3-kinase/Akt pathway, the Mitogen Activated Protein Kinase (MAPK) cascade and the AMP Kinase pathway, with successful monitoring of the PI3-K pathway. Investigations involved observing and evaluating the effects of various compounds as well as an indigenous medicinal plant, Sutherlandia frutescens on the activities of key insulin signalling pathway intermediates within the three fore mentioned pathways including Akt, AMPK and MEK1/2 as well as membrane surface GLUT4 levels. Scientific research has in the past leant heavily on Western blotting as the method of choice for gaining vital information relating to signal transduction pathways, however for research into cellular mechanisms the negatives of this method outweigh the positives. The drawbacks include a need for large amount of cells, multiple washing steps which may be disadvantageous to any weak and transient interactions as well as lysing of cells which may interfere with the maintenance of the subcellular localisation of a specific signalling event. Based on these, the need for a better method in terms of speed & reliability to monitor phosphorylation states of signal transduction pathway intermediates & GLUT4 translocation was evident and was one VII of the main aims & successes of this study. The method created used the mouse muscle cell line C2C12 in conjunction with the quick, sensitive method of flow cytometry which allowed us to monitor these processes in these cells through immune-labelling. Adherent cell cultures such as the C2C12 cell line pose the problem of possible damage to plasma membrane receptors (including insulin receptors) during harvesting to obtain a cell suspension for flow cytometry. We however used C2C12 mouse myocytes to optimize a method yielding insulin responsive cells in suspension that were successfully used for flow cytometry after immunelabelling of insulin signalling intermediates. Insulin (0.1μM) significantly raised the levels of both P-Akt and GLUT4 above basal levels. This effect was shown to be dose dependent. At a concentration of 50μg/ml, Sutherlandia frutescens was able to act as an insulin-mimetic in terms of its ability to increase P-Akt levels, GLUT4 translocation and glucose utilisation in an acute manner. These increases could be reduced with the addition of wortmannin, a PI3-K inhibitor. Therefore, these results suggest the mechanism of the plant extract’s insulin-like activity may be in part due to the activation of the insulin signalling pathway leading to GLUT4 translocation, which involves the phosphorylation of insulin receptor- and subsequent PI3-K activity, leading to P-Akt activity. These results provide further evidence of this plant extract’s anti-diabetic potential. The effect of Sutherlandia frutescens on insulin secretion, calcium signalling and proliferation in INS-1 rat pancreatic cells was also investigated and it was found to increase the activities of all of these processes. However no change in the levels of GLUT2 glucose transporter was seen. Ritonavir is prescribed by the South African Department of Health in co-formulation with other protease inhibitors within its second regime in the treatment of HIV and AIDS. Using C2C12 cells, ritonavir decreased glucose uptake acutely and had no effect on GLUT4 translocation however surprisingly increased P-Akt levels. In conclusion, it was found that Sutherlandia frutescens has antidiabetic benefits, diverse in nature depending on tissue type as well as length of time administered. The establishment of novel flow cytometry techniques to assess antidiabetic properties using in vitro cell culture was achieved. These methods will be useful in the future for the assessment of insulin sensitivity and in the identification of novel compounds that stimulate the insulin signalling pathways.
- Full Text:
- Date Issued: 2010
Implementation of the dual therapy prevention of mother-to-child transmission protocol
- Authors: Singh, Vikesh
- Date: 2010
- Subjects: HIV infections -- Transmission -- South Africa , AIDS (Disease) in pregnancy -- Prevention -- South Africa , Antiretroviral agents
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:10138 , http://hdl.handle.net/10948/1374 , HIV infections -- Transmission -- South Africa , AIDS (Disease) in pregnancy -- Prevention -- South Africa , Antiretroviral agents
- Description: Antiretroviral drugs taken during pregnancy, reduce the rates of mother-to-child transmission from 35 percent to as low as 1 to 2 percent (UNAIDS, 2009). In 2002, the Prevention of Mother-to-Child Transmission (PMTCT) programme was implemented in South Africa. Studies on the implementation of the PMTCT programme have shown that understaffed and under-developed health care facilities were key barriers to the provision of PMTCT services (Health Systems Trust, 2002: 6; Skinner et al., 2003). The aim of this study was to assess the challenges experienced by health care workers working in public sector facilities in the Nelson Mandela Metropole after implementation of the dual therapy PMTCT programme. Four areas were investigated: Infrastructure; Drug Supply Management; Clinic Procedures and Staffing. A quantitative descriptive study was conducted in August 2009 at nine public health care facilities in the Nelson Mandela Metropole, South Africa. Questionnaires were issued to 81 nurses and 41 pharmacy personnel (pharmacists and pharmacist assistants). Checklist audit forms were issued to the Facility Manager of each facility and completed with the researcher. The key findings for Infrastructure were lack of space at patient waiting rooms (9; 100 percent n=9), counselling area (5; 55.5 percent; n=9), nurse consultation rooms (6; 66.6 percent; n=9), storage areas (5; 55.5 percent; n=9) and filing areas (7; 77.7 percent; n=9). The key findings for Drug Supply Management were none of the dispensaries (0 percent; n=10) were fully compliant with Good Pharmacy Practice, pharmacy personnel indicated that there were no stock cards for medication (13; 31.7 percent; n=41); there was less than two weeks supply of buffer stock kept for zidovudine and nevirapine (13; 35.1percent; n=37) and medication orders were placed without any reference to minimum and maximum levels of medication (15; 36.5 percent; n=41) . The key findings for Clinic Procedures were only two facilities followed up on patients that had missed appointments (22.2 percent; n=9) and four facilities (44.4 percent; n=9) had a tracking system for patients that had defaulted. Of the nine facilities only three (33.3 percent; n=9) updated patient demographic details regularly. The key findings for Staffing were a shortage of doctors, nurses, counsellors and pharmacists at the facilities. One of the major challenges identified was the lack of training offered on new PMTCT protocols with 56.2 percent (45; n=80) of the nurses stating that no training was provided on the dual PMTCT protocol. Only 54.3 percent (44; n=81) of nurses stated that they knew the criteria to start the mother on dual PMTCT therapy. In conclusion there is an urgent need for barriers such as lack of staff, lack of space, lack of training on PMTCT and standard procedures for follow up of patients to be addressed in order to ensure the successful scaling up of PMTCT.
- Full Text:
- Date Issued: 2010
- Authors: Singh, Vikesh
- Date: 2010
- Subjects: HIV infections -- Transmission -- South Africa , AIDS (Disease) in pregnancy -- Prevention -- South Africa , Antiretroviral agents
- Language: English
- Type: Thesis , Masters , MPharm
- Identifier: vital:10138 , http://hdl.handle.net/10948/1374 , HIV infections -- Transmission -- South Africa , AIDS (Disease) in pregnancy -- Prevention -- South Africa , Antiretroviral agents
- Description: Antiretroviral drugs taken during pregnancy, reduce the rates of mother-to-child transmission from 35 percent to as low as 1 to 2 percent (UNAIDS, 2009). In 2002, the Prevention of Mother-to-Child Transmission (PMTCT) programme was implemented in South Africa. Studies on the implementation of the PMTCT programme have shown that understaffed and under-developed health care facilities were key barriers to the provision of PMTCT services (Health Systems Trust, 2002: 6; Skinner et al., 2003). The aim of this study was to assess the challenges experienced by health care workers working in public sector facilities in the Nelson Mandela Metropole after implementation of the dual therapy PMTCT programme. Four areas were investigated: Infrastructure; Drug Supply Management; Clinic Procedures and Staffing. A quantitative descriptive study was conducted in August 2009 at nine public health care facilities in the Nelson Mandela Metropole, South Africa. Questionnaires were issued to 81 nurses and 41 pharmacy personnel (pharmacists and pharmacist assistants). Checklist audit forms were issued to the Facility Manager of each facility and completed with the researcher. The key findings for Infrastructure were lack of space at patient waiting rooms (9; 100 percent n=9), counselling area (5; 55.5 percent; n=9), nurse consultation rooms (6; 66.6 percent; n=9), storage areas (5; 55.5 percent; n=9) and filing areas (7; 77.7 percent; n=9). The key findings for Drug Supply Management were none of the dispensaries (0 percent; n=10) were fully compliant with Good Pharmacy Practice, pharmacy personnel indicated that there were no stock cards for medication (13; 31.7 percent; n=41); there was less than two weeks supply of buffer stock kept for zidovudine and nevirapine (13; 35.1percent; n=37) and medication orders were placed without any reference to minimum and maximum levels of medication (15; 36.5 percent; n=41) . The key findings for Clinic Procedures were only two facilities followed up on patients that had missed appointments (22.2 percent; n=9) and four facilities (44.4 percent; n=9) had a tracking system for patients that had defaulted. Of the nine facilities only three (33.3 percent; n=9) updated patient demographic details regularly. The key findings for Staffing were a shortage of doctors, nurses, counsellors and pharmacists at the facilities. One of the major challenges identified was the lack of training offered on new PMTCT protocols with 56.2 percent (45; n=80) of the nurses stating that no training was provided on the dual PMTCT protocol. Only 54.3 percent (44; n=81) of nurses stated that they knew the criteria to start the mother on dual PMTCT therapy. In conclusion there is an urgent need for barriers such as lack of staff, lack of space, lack of training on PMTCT and standard procedures for follow up of patients to be addressed in order to ensure the successful scaling up of PMTCT.
- Full Text:
- Date Issued: 2010
Implementing capital budgeting for the multinational corporation
- Authors: Wang, Xin
- Date: 2010
- Subjects: International business enterprises -- Accounting
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:8939 , http://hdl.handle.net/10948/1304 , International business enterprises -- Accounting
- Description: There are many reasons to believe that budgeting lies at the heart of business management. Gray et al (2001:324) states that ―budgetary planning and control is the most visible use of accounting information in the management control process. By setting standards of performance and providing feedback by means of variance reports, the accountant supplies much of the fundamental information required for overall planning and control. However, Gray et al (2001:324) point out that capital budgeting decision is limited by the intricacies of the international business environment, which is characterized by economic, social, political, and cultural diversity. Therefore, decisions of capital investments and budgetary controls are more problematic (Gray et al., 2001:14). One of the defining characteristics of the globalization of the world economy in the past two decades has been the spread of multinational corporations' activities across countries, and, as a result, significant increases in global foreign direct investment (FDI) outflow in the 1990s (from R233 billion in 1990 to R1, 379 billion in 2000). For example, the total stock of Chinese direct investment abroad nearly tripled over the 1990s (from $2.2 trillion in 1990 to $6.3 trillion in 2000) as Chinese multinational corporations generated an increasingly large share of world GDP (6.8 percent in 1994 and 8.6 percent in 2000). Multinational corporations have become an important conduit in the global allocation of investment funds. However, the business environment in international markets has been considered volatile; there is no reliable and accurate method to aid 2 multinational corporations about decisions about the international environment. Thus, multinational corporations have encountered risk and challenge. Given the development and challenge of the international environment, this study have been considered to plan over a longer time horizon, develop formal mechanisms to set aside funds for preserving existing facilities, increase automation of the process, and link capital planning decisions to statewide performance goals and strategic plans. This research draws upon existing theoretical determinants of capital budgeting and empirically tests the hypotheses across a sample of multinational corporations in China. Although the sample is from China, the results have important implications for multinational corporations based in other countries. This paper is composed of four parts. The first part briefly gives both a theoretical and practical overview of multinational capital budgeting analysis. The second part discusses the data collection techniques and the questionnaire design used in this study. The third part provides some important findings of this research. The last section offers some conclusions from this study.
- Full Text:
- Date Issued: 2010
- Authors: Wang, Xin
- Date: 2010
- Subjects: International business enterprises -- Accounting
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:8939 , http://hdl.handle.net/10948/1304 , International business enterprises -- Accounting
- Description: There are many reasons to believe that budgeting lies at the heart of business management. Gray et al (2001:324) states that ―budgetary planning and control is the most visible use of accounting information in the management control process. By setting standards of performance and providing feedback by means of variance reports, the accountant supplies much of the fundamental information required for overall planning and control. However, Gray et al (2001:324) point out that capital budgeting decision is limited by the intricacies of the international business environment, which is characterized by economic, social, political, and cultural diversity. Therefore, decisions of capital investments and budgetary controls are more problematic (Gray et al., 2001:14). One of the defining characteristics of the globalization of the world economy in the past two decades has been the spread of multinational corporations' activities across countries, and, as a result, significant increases in global foreign direct investment (FDI) outflow in the 1990s (from R233 billion in 1990 to R1, 379 billion in 2000). For example, the total stock of Chinese direct investment abroad nearly tripled over the 1990s (from $2.2 trillion in 1990 to $6.3 trillion in 2000) as Chinese multinational corporations generated an increasingly large share of world GDP (6.8 percent in 1994 and 8.6 percent in 2000). Multinational corporations have become an important conduit in the global allocation of investment funds. However, the business environment in international markets has been considered volatile; there is no reliable and accurate method to aid 2 multinational corporations about decisions about the international environment. Thus, multinational corporations have encountered risk and challenge. Given the development and challenge of the international environment, this study have been considered to plan over a longer time horizon, develop formal mechanisms to set aside funds for preserving existing facilities, increase automation of the process, and link capital planning decisions to statewide performance goals and strategic plans. This research draws upon existing theoretical determinants of capital budgeting and empirically tests the hypotheses across a sample of multinational corporations in China. Although the sample is from China, the results have important implications for multinational corporations based in other countries. This paper is composed of four parts. The first part briefly gives both a theoretical and practical overview of multinational capital budgeting analysis. The second part discusses the data collection techniques and the questionnaire design used in this study. The third part provides some important findings of this research. The last section offers some conclusions from this study.
- Full Text:
- Date Issued: 2010
Implications of a currency board arrangement for the Zimbabwean economy: the lessons of experience
- Authors: Ndlovu, Edwin
- Date: 2010
- Subjects: Economic indicators , Inflation targeting , Foreign exchange
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26492 , vital:65480
- Description: Inflation is one of the most important factors for gauging the health of the economy. For production, employment and trade to take place, it is crucial that inflation be low and stable. This study analyses the implications of a currency board system in a hyperinflationary economy, using quarterly Zimbabwean data covering the period 1995 to 2008.An empirical model linking inflation to its identified theoretical determinants is specified. The study employs a cointegration and a vector error correction (VEC) modeling, to provide robust long run and short run dynamic effects of hyper inflation on the economy. The empirical findings reveal a strong significant relationship between inflation and government deficit, expected inflation, money supply growth and the exchange rate. These results corroborate the theoretical predictions and the previous findings that most hyperinflations are deficit-induced. The study thus suggests an implementation of a currency board arrangement for Zimbabwe to eradicate hyperinflation based on its link with exchange rate, money supply and government deficit. A currency board restrains the tendency by most central banks to create money to finance government deficits, and reduces expectations of rising inflation through its instantaneous credibility in reducing inflation. , Thesis (MCom) -- Faculty of Management and Commerce, 2010
- Full Text:
- Date Issued: 2010
- Authors: Ndlovu, Edwin
- Date: 2010
- Subjects: Economic indicators , Inflation targeting , Foreign exchange
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26492 , vital:65480
- Description: Inflation is one of the most important factors for gauging the health of the economy. For production, employment and trade to take place, it is crucial that inflation be low and stable. This study analyses the implications of a currency board system in a hyperinflationary economy, using quarterly Zimbabwean data covering the period 1995 to 2008.An empirical model linking inflation to its identified theoretical determinants is specified. The study employs a cointegration and a vector error correction (VEC) modeling, to provide robust long run and short run dynamic effects of hyper inflation on the economy. The empirical findings reveal a strong significant relationship between inflation and government deficit, expected inflation, money supply growth and the exchange rate. These results corroborate the theoretical predictions and the previous findings that most hyperinflations are deficit-induced. The study thus suggests an implementation of a currency board arrangement for Zimbabwe to eradicate hyperinflation based on its link with exchange rate, money supply and government deficit. A currency board restrains the tendency by most central banks to create money to finance government deficits, and reduces expectations of rising inflation through its instantaneous credibility in reducing inflation. , Thesis (MCom) -- Faculty of Management and Commerce, 2010
- Full Text:
- Date Issued: 2010
Improving customer service through effective supply chain management in a pharmaceutical company
- Authors: Rothner, Donne
- Date: 2010
- Subjects: Customer services -- South Africa , Customer services -- Management , Customer services -- South Africa -- Quality control , Business logistics -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8625 , http://hdl.handle.net/10948/1490 , Customer services -- South Africa , Customer services -- Management , Customer services -- South Africa -- Quality control , Business logistics -- South Africa
- Description: All organisations compete on the basis of service. In today‘s highly competitive world, organisations need to compete to retain their customers and to offer good customer service that will give them a competitive advantage. In the South African pharmaceutical market, the introduction of the Single Exit Price (SEP) and generic substitution have led to the price of equivalent medicines no longer being the differentiating factor in a customer deciding which manufacturer‘s product to purchase. The availability of generic medicines at the pharmacy or hospital has become the differentiating factor. Two types of customers exist in any organisation, namely, external customers and internal customers. Much has been written about the external customer, but less about the internal customer. Many managers do not perceive internal customer service as a priority. Any organisation attempting to deliver quality service to their external customers must begin by serving the needs of their internal customers. Internal service quality is characterised by the attitudes that people have towards one another and in the way that employees serve one another inside the organisation. By improving customer service, the organisation can improve its profitability, sustainability and customer retention. The aim of this study was to determine whether the levels of internal customer service between the three sections of Aspen Pharmacare are optimal. Determining the current performance levels between the staff of the sections will assist in highlighting the areas that require attention. The three sections of Aspen Pharmacare that are internal customers of one another and have been used in the study are: - production; - demand planning; and - distribution. The results of the study show that all three sections rate three service quality dimensions (communication, tangibles and reliability) as important. The results were used to develop an internal customer service model for Aspen Pharmacare.
- Full Text:
- Date Issued: 2010
- Authors: Rothner, Donne
- Date: 2010
- Subjects: Customer services -- South Africa , Customer services -- Management , Customer services -- South Africa -- Quality control , Business logistics -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8625 , http://hdl.handle.net/10948/1490 , Customer services -- South Africa , Customer services -- Management , Customer services -- South Africa -- Quality control , Business logistics -- South Africa
- Description: All organisations compete on the basis of service. In today‘s highly competitive world, organisations need to compete to retain their customers and to offer good customer service that will give them a competitive advantage. In the South African pharmaceutical market, the introduction of the Single Exit Price (SEP) and generic substitution have led to the price of equivalent medicines no longer being the differentiating factor in a customer deciding which manufacturer‘s product to purchase. The availability of generic medicines at the pharmacy or hospital has become the differentiating factor. Two types of customers exist in any organisation, namely, external customers and internal customers. Much has been written about the external customer, but less about the internal customer. Many managers do not perceive internal customer service as a priority. Any organisation attempting to deliver quality service to their external customers must begin by serving the needs of their internal customers. Internal service quality is characterised by the attitudes that people have towards one another and in the way that employees serve one another inside the organisation. By improving customer service, the organisation can improve its profitability, sustainability and customer retention. The aim of this study was to determine whether the levels of internal customer service between the three sections of Aspen Pharmacare are optimal. Determining the current performance levels between the staff of the sections will assist in highlighting the areas that require attention. The three sections of Aspen Pharmacare that are internal customers of one another and have been used in the study are: - production; - demand planning; and - distribution. The results of the study show that all three sections rate three service quality dimensions (communication, tangibles and reliability) as important. The results were used to develop an internal customer service model for Aspen Pharmacare.
- Full Text:
- Date Issued: 2010
Improving economic development through effective communication strategies in Nelson Mandela Bay
- Authors: Headbush, Shambalda
- Date: 2010
- Subjects: Communication in economic development
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8666 , http://hdl.handle.net/10948/1246 , Communication in economic development
- Description: The purpose of this study is to improve Local Economic Development (LED) through effective communication strategies between Local Government and the Private sector in Nelson Mandela Bay. The study has been carried out by means of a literature and a primary study. Effective communication is one of the key elements which contribute to the success of Local Economic Development implementation. The communication strategies in Local Economic Development have been discussed and analysed to determine the ineffective methods of communication in Local Economic Development implementation. The literature indicated that a good communication strategy is determining the most effective method of communicating with ones’ target audience. The findings of the primary study revealed that the communication strategy between the stakeholders was not fully maximised in improving Local Economic Development implementation. It also revealed secondary factors that contributed to the ineffectiveness of Local Economic Development implementation. In order to improve the current communication strategies, the researcher recommended that new forms of communication medium between Government and the Private sector could be introduced. Lastly, the secondary factors which contribute to ineffective Local Economic Development implementation were analysed and recommendations were suggested.
- Full Text:
- Date Issued: 2010
- Authors: Headbush, Shambalda
- Date: 2010
- Subjects: Communication in economic development
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8666 , http://hdl.handle.net/10948/1246 , Communication in economic development
- Description: The purpose of this study is to improve Local Economic Development (LED) through effective communication strategies between Local Government and the Private sector in Nelson Mandela Bay. The study has been carried out by means of a literature and a primary study. Effective communication is one of the key elements which contribute to the success of Local Economic Development implementation. The communication strategies in Local Economic Development have been discussed and analysed to determine the ineffective methods of communication in Local Economic Development implementation. The literature indicated that a good communication strategy is determining the most effective method of communicating with ones’ target audience. The findings of the primary study revealed that the communication strategy between the stakeholders was not fully maximised in improving Local Economic Development implementation. It also revealed secondary factors that contributed to the ineffectiveness of Local Economic Development implementation. In order to improve the current communication strategies, the researcher recommended that new forms of communication medium between Government and the Private sector could be introduced. Lastly, the secondary factors which contribute to ineffective Local Economic Development implementation were analysed and recommendations were suggested.
- Full Text:
- Date Issued: 2010
Improving explanation writing skills of junior secondary learners in life sciences: a case study
- Authors: Josua, Helena Megameno N
- Date: 2010
- Subjects: Writing skills English language -- Study and teaching (Secondary) -- South Africa English language -- Writing -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1570 , http://hdl.handle.net/10962/d1003452
- Description: Learners in the Junior Secondary Phase (Grades 8 to 10) are often required to answer open-ended questions which require a response in the form of an explanation. As frequently reported in the external examiners' reports of Life Sciences, learners do not write adequate explanations as responses to explanatory questions. This thesis reports on action research based on my experience as a Life Sciences teacher trying to address this problem. Therefore, the purpose of this study was to develop suitable, manageable and effective strategies that I could implement in order to improve my teaching of explanation writing skills of in the Junior Secondary school learners with a view to enhance curriculum content knowledge in Life Sciences. The intervention was carried out in a Grade 10 Life Sciences class which consisted of 35 learners. The first cycle consisted of seven lessons carried out over two weeks in normal school time. The main sources of data from my lesson interventions were the learners' written work, their journal entries, the researcher's journal, the field notes from the non-participant observer and interviews with two focus groups. Both the interviews and the lessons were recorded and transcribed. The research data reveals that the ability of the Junior Secondary learners to write explanations was hindered by language problems. In addition, a lack of integration of language issues into the subject content was a contributing factor to their inadequate writing skills. Spelling errors and lack of expression in English second language contribute to the problem of writing good explanations. The data has also revealed that learners‟ writing skills can be improved by implementing suitable teaching strategies, such as the curriculum cycle as proposed by Gibbons (2002). The curriculum cycle can be modified to fit the learners' needs and the real teaching situation. The amount of practice required to master the skill of writing in the genre of explanations should be considered.
- Full Text:
- Date Issued: 2010
- Authors: Josua, Helena Megameno N
- Date: 2010
- Subjects: Writing skills English language -- Study and teaching (Secondary) -- South Africa English language -- Writing -- Study and teaching
- Language: English
- Type: Thesis , Masters , MEd
- Identifier: vital:1570 , http://hdl.handle.net/10962/d1003452
- Description: Learners in the Junior Secondary Phase (Grades 8 to 10) are often required to answer open-ended questions which require a response in the form of an explanation. As frequently reported in the external examiners' reports of Life Sciences, learners do not write adequate explanations as responses to explanatory questions. This thesis reports on action research based on my experience as a Life Sciences teacher trying to address this problem. Therefore, the purpose of this study was to develop suitable, manageable and effective strategies that I could implement in order to improve my teaching of explanation writing skills of in the Junior Secondary school learners with a view to enhance curriculum content knowledge in Life Sciences. The intervention was carried out in a Grade 10 Life Sciences class which consisted of 35 learners. The first cycle consisted of seven lessons carried out over two weeks in normal school time. The main sources of data from my lesson interventions were the learners' written work, their journal entries, the researcher's journal, the field notes from the non-participant observer and interviews with two focus groups. Both the interviews and the lessons were recorded and transcribed. The research data reveals that the ability of the Junior Secondary learners to write explanations was hindered by language problems. In addition, a lack of integration of language issues into the subject content was a contributing factor to their inadequate writing skills. Spelling errors and lack of expression in English second language contribute to the problem of writing good explanations. The data has also revealed that learners‟ writing skills can be improved by implementing suitable teaching strategies, such as the curriculum cycle as proposed by Gibbons (2002). The curriculum cycle can be modified to fit the learners' needs and the real teaching situation. The amount of practice required to master the skill of writing in the genre of explanations should be considered.
- Full Text:
- Date Issued: 2010
Improving Productivity of Maize-based Smallholder Irrigated Cropping Systems: A Case Study of Zanyokwe Irrigation Scheme, Eastern Cape, South Africa
- Authors: Fanadzo, Morris
- Date: 2010
- Subjects: Farms, Small -- South Africa -- Eastern Cape Crop yields -- South Africa -- Eastern Cape Agricultural productivity -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/11009 , vital:36450
- Description: Smallholder irrigation schemes (SIS) in South Africa have performed poorly and failed to achieve the development objectives of sustaining rural livelihoods by increasing crop production and income. Limited knowledge of crop production among farmers is one constraint to improved crop productivity and, yet little research has been carried out to relate agronomic practices to productivity. This study was aimed at identifying strategies to improve the productivity of maize-based smallholder irrigated cropping systems in South Africa, using Zanyokwe irrigation scheme (ZIS) in the Eastern Cape Province as a case study. The research design was emergent, developed progressively as influenced by the progressive analyses that were made. The research work involved two main phases: exploratory studies and refinement on-farm experiments for testing technologies as informed by the exploratory studies. Exploratory studies were aimed at describing farmer crop production practices in major crop enterprises and identifying and prioritizing major agronomic yield constraints. Findings indicated that the overall performance of the cropping systems was poor as evidenced by low overall yields of < 25% of the potential in maize and butternut. Poor management of weeds, soil fertility, plant populations and water, late planting and poor cultivar choice were the most important yield constraints. The average cropping intensity achieved by farmers was only 48%. New hybrids yielded 50 - 65% higher grain than the cultivars commonly grown by farmers. However, farmers favoured their traditional cultivars, as they preferred green maize production as opposed to dry grains. As a result of these findings, focused research was designed on options for iii improving green maize production, soil fertility, crop stand and weed management in crop production. On-farm trials were, therefore, designed to (1) compare the response to nitrogen (N) rate of direct seeded and transplanted maize; (2) evaluate comparative performance of direct seeded and transplanted green maize under farmer management, and to work out the economics of transplanting; (3) investigate the effects of row spacing and atrazine dosage on weed dynamics maize yield; (4) determine the effects of inter-row spacing and plant population on weed dynamics and maize yield; and (5) investigate the effects of pre-plant weed control, N rate and plant population on weed dynamics and butternut yield. Maize transplanting improved crop stand, had earlier maturity and yielded higher at lower N rates compared to direct seeding for both green and grain maize. Total costs that varied were higher by R3 565 ha-1 for transplanted maize compared to direct-seeded maize, but the net benefits from transplanting were also much higher by R8 773 ha-1. Farmers favoured transplanting, citing bigger cobs, early maturity and the absence of seedling damage by birds, when maize was transplanted. However, a follow-up survey conducted during the subsequent year indicated that five of the six farmers abandoned transplanting, citing shortage of labour and high cost of commercially produced seedlings. It was concluded that transplanting is unlikely to be adopted unless the labour intensiveness of manual transplanting can be solved. Increasing atrazine dosage from a third of the label recommended dosage (LRD) and reducing row spacing from 90 to 45 cm resulted in an increase in weed mortality. A 100% kill of annual broadleaf weeds was possible while iv perennial grasses and the annual broadleaf weed, Oxalis latifolia, could not be controlled even at the LRD. However, improved weed mortality with increase in atrazine dosage and/or narrow rows did not translate into improved maize productivity. In butternut, pre-plant weed control resulted in a six-fold decrease in weed biomass and a 100% increase in fruit yield. These findings demonstrated the possibility of incorporation of reduced herbicide dosages and narrow rows to achieve adequate weed control and optimise on maize yields in smallholder farming systems. The results also suggested that pre-plant weed control is one of the pre-requisite to successful butternut production in SIS in South Africa. Increasing maize population from 40 000 to 60 000 plants ha-1 resulted in a 30% grain yield increase, but decreased length of cobs. Row spacing had no effect on maize yield at 40 000 plants ha-1, but at 60 000 plants ha-1 45 cm rows resulted in 11% higher grain yield (12 547 kg ha-1) than 90 cm rows (11 288 kg ha-1). Butternut yield increased significantly (p < 0.01) with increase in plant population and N rate. The optimum butternut population and N rate were estimated at 25 000 plants ha-1 and 120 kg N ha-1, respectively. Pre-plant weed control in butternut resulted in a six-fold decrease in weed biomass. Increasing butternut planting density from 10 000 to 30 000 plants ha-1 decreased weed biomass by 47%. No marketable fruits were obtained when planting was done without prior weed control. This result suggest that application of non-selective herbicide before planting is one technique that can be used by farmers as part of integrated weed management to give the crop a competitive advantage in the early growth stages before the plants start to produce vines. Yield increased significantly (p < 0.01) with increase in plant density and N rate. The optimum plant density and N rate were estimated at 25 000 plants ha-1 and 120 kg N ha-1, respectively. These findings emphasise the need to take into consideration production practices by farmers as a basis to build up skills in the management of crop enterprises and the farm as a viable business in any efforts to improve on the performance of SIS in South Africa. Future research should concentrate on labour-saving sustainable production technologies for SIS in South Africa.
- Full Text:
- Date Issued: 2010
- Authors: Fanadzo, Morris
- Date: 2010
- Subjects: Farms, Small -- South Africa -- Eastern Cape Crop yields -- South Africa -- Eastern Cape Agricultural productivity -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/11009 , vital:36450
- Description: Smallholder irrigation schemes (SIS) in South Africa have performed poorly and failed to achieve the development objectives of sustaining rural livelihoods by increasing crop production and income. Limited knowledge of crop production among farmers is one constraint to improved crop productivity and, yet little research has been carried out to relate agronomic practices to productivity. This study was aimed at identifying strategies to improve the productivity of maize-based smallholder irrigated cropping systems in South Africa, using Zanyokwe irrigation scheme (ZIS) in the Eastern Cape Province as a case study. The research design was emergent, developed progressively as influenced by the progressive analyses that were made. The research work involved two main phases: exploratory studies and refinement on-farm experiments for testing technologies as informed by the exploratory studies. Exploratory studies were aimed at describing farmer crop production practices in major crop enterprises and identifying and prioritizing major agronomic yield constraints. Findings indicated that the overall performance of the cropping systems was poor as evidenced by low overall yields of < 25% of the potential in maize and butternut. Poor management of weeds, soil fertility, plant populations and water, late planting and poor cultivar choice were the most important yield constraints. The average cropping intensity achieved by farmers was only 48%. New hybrids yielded 50 - 65% higher grain than the cultivars commonly grown by farmers. However, farmers favoured their traditional cultivars, as they preferred green maize production as opposed to dry grains. As a result of these findings, focused research was designed on options for iii improving green maize production, soil fertility, crop stand and weed management in crop production. On-farm trials were, therefore, designed to (1) compare the response to nitrogen (N) rate of direct seeded and transplanted maize; (2) evaluate comparative performance of direct seeded and transplanted green maize under farmer management, and to work out the economics of transplanting; (3) investigate the effects of row spacing and atrazine dosage on weed dynamics maize yield; (4) determine the effects of inter-row spacing and plant population on weed dynamics and maize yield; and (5) investigate the effects of pre-plant weed control, N rate and plant population on weed dynamics and butternut yield. Maize transplanting improved crop stand, had earlier maturity and yielded higher at lower N rates compared to direct seeding for both green and grain maize. Total costs that varied were higher by R3 565 ha-1 for transplanted maize compared to direct-seeded maize, but the net benefits from transplanting were also much higher by R8 773 ha-1. Farmers favoured transplanting, citing bigger cobs, early maturity and the absence of seedling damage by birds, when maize was transplanted. However, a follow-up survey conducted during the subsequent year indicated that five of the six farmers abandoned transplanting, citing shortage of labour and high cost of commercially produced seedlings. It was concluded that transplanting is unlikely to be adopted unless the labour intensiveness of manual transplanting can be solved. Increasing atrazine dosage from a third of the label recommended dosage (LRD) and reducing row spacing from 90 to 45 cm resulted in an increase in weed mortality. A 100% kill of annual broadleaf weeds was possible while iv perennial grasses and the annual broadleaf weed, Oxalis latifolia, could not be controlled even at the LRD. However, improved weed mortality with increase in atrazine dosage and/or narrow rows did not translate into improved maize productivity. In butternut, pre-plant weed control resulted in a six-fold decrease in weed biomass and a 100% increase in fruit yield. These findings demonstrated the possibility of incorporation of reduced herbicide dosages and narrow rows to achieve adequate weed control and optimise on maize yields in smallholder farming systems. The results also suggested that pre-plant weed control is one of the pre-requisite to successful butternut production in SIS in South Africa. Increasing maize population from 40 000 to 60 000 plants ha-1 resulted in a 30% grain yield increase, but decreased length of cobs. Row spacing had no effect on maize yield at 40 000 plants ha-1, but at 60 000 plants ha-1 45 cm rows resulted in 11% higher grain yield (12 547 kg ha-1) than 90 cm rows (11 288 kg ha-1). Butternut yield increased significantly (p < 0.01) with increase in plant population and N rate. The optimum butternut population and N rate were estimated at 25 000 plants ha-1 and 120 kg N ha-1, respectively. Pre-plant weed control in butternut resulted in a six-fold decrease in weed biomass. Increasing butternut planting density from 10 000 to 30 000 plants ha-1 decreased weed biomass by 47%. No marketable fruits were obtained when planting was done without prior weed control. This result suggest that application of non-selective herbicide before planting is one technique that can be used by farmers as part of integrated weed management to give the crop a competitive advantage in the early growth stages before the plants start to produce vines. Yield increased significantly (p < 0.01) with increase in plant density and N rate. The optimum plant density and N rate were estimated at 25 000 plants ha-1 and 120 kg N ha-1, respectively. These findings emphasise the need to take into consideration production practices by farmers as a basis to build up skills in the management of crop enterprises and the farm as a viable business in any efforts to improve on the performance of SIS in South Africa. Future research should concentrate on labour-saving sustainable production technologies for SIS in South Africa.
- Full Text:
- Date Issued: 2010
Improving project implementation in firms
- Authors: Hassen, Ismail
- Date: 2010
- Subjects: Project management -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8667 , http://hdl.handle.net/10948/1245 , Project management -- South Africa
- Description: Project implementation appears to be one the most difficult aspects of a manager’s job. The purpose of project management is to forecast or anticipate potential dangers and problems that may jeopardise the success of a project and then to plan, organise and control activities that will lead to the successful completion of projects in spite of all the envisaged risks. It is estimated that more than 80% of projects run late or over budget. Such failure often sinks small firms and erodes profits of larger organisations. Project implementation is therefore critical to the success of both small and big firms. The primary objective of this study is to improve project management in firms by investigating the variables that influence project implementation. More specifically, the study investigates the influence of organisational communication, leadership, business process management and resistance to change on project implementation. The sample consisted of 170 employees in a cross-section of industries. The sample was stratified to include senior managers, managers, supervisors and lower level employees. The empirical results show that organisational communication, participatory leadership, retention of the status quo and goal-oriented leadership increase project implementation, while resistance to change decreases project implementation.
- Full Text:
- Date Issued: 2010
- Authors: Hassen, Ismail
- Date: 2010
- Subjects: Project management -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8667 , http://hdl.handle.net/10948/1245 , Project management -- South Africa
- Description: Project implementation appears to be one the most difficult aspects of a manager’s job. The purpose of project management is to forecast or anticipate potential dangers and problems that may jeopardise the success of a project and then to plan, organise and control activities that will lead to the successful completion of projects in spite of all the envisaged risks. It is estimated that more than 80% of projects run late or over budget. Such failure often sinks small firms and erodes profits of larger organisations. Project implementation is therefore critical to the success of both small and big firms. The primary objective of this study is to improve project management in firms by investigating the variables that influence project implementation. More specifically, the study investigates the influence of organisational communication, leadership, business process management and resistance to change on project implementation. The sample consisted of 170 employees in a cross-section of industries. The sample was stratified to include senior managers, managers, supervisors and lower level employees. The empirical results show that organisational communication, participatory leadership, retention of the status quo and goal-oriented leadership increase project implementation, while resistance to change decreases project implementation.
- Full Text:
- Date Issued: 2010
Improving sanitization and fertiliser value of dairy manure and waste paper mixtures enriched with rock phosphate through combined thermophilic composting and vermicomposting
- Authors: Mupondi, Lushian Tapiwa
- Date: 2010
- Subjects: Compost , Vermicomposting , Manures , Biodegradation , Waste paper -- South Africa -- Eastern Cape , Thermophilic bacteria , Fertilizers
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11961 , http://hdl.handle.net/10353/411 , Compost , Vermicomposting , Manures , Biodegradation , Waste paper -- South Africa -- Eastern Cape , Thermophilic bacteria , Fertilizers
- Description: Thermophilic composting (TC) and vermicomposting (V) are the two most common methods used for biological stabilization of solid organic wastes. Both have their advantages and disadvantages but the proposed method of combining composting and vermicomposting (CV) borrows pertinent attributes from each of the two methods and combines them to enhance overall process and product qualities. Dairy manure and waste paper are two wastes produced in large quantities at the University of Fort Hare. The study was carried out to address the following specific objectives, to determine (i) the effectiveness of combined thermophilic composting and vermicomposting on the biodegradation and sanitization of mixtures of dairy manure and paper waste, (ii) an optimum precomposting period for dairy manure paper waste mixtures that results in vermicomposts of good nutritional quality and whose use will not jeopardize human health, (iii) the effectiveness of phosphate rock (PR) in increasing available P and degradation and nutrient content of dairy manure-paper vermicomposts, (iv) the physicochemical properties of vermicompost substituted pine bark compost and performance of resultant growing medium on plant growth and nutrient uptake. Results of this study revealed that wastes with a C: N ratio of 30 were more suitable for both V and CV as their composts were more stabilized and with higher nutrient contents than composts made from wastes with a C: N ratio of 45. Both V and CV were effective methods for the biodegradation of dairy manure and paper waste mixtures with C: N ratio of 30 but the latter was more effective in the biodegradation of waste mixtures with a C: N ratio of 45. The combinination of composting and vermicomposting eliminated the indicator pathogen E. coli 0157 from the final composts whereas V only managed to reduce the pathogen population. iv A follow up study was done to determine the effects of precomposting on pathogen numbers so as to come up with a suitable precomposting period to use when combine composting dairy manure-waste paper mixtures. Results of this study showed that over 95% of fecal coliforms, E. coli and of E. coli 0157 were eliminated from the wastes within one week of precomposting and total elimination of these and protozoan (oo)cysts achieved after 3 weeks of precomposting. The vermicomposts pathogen content was related to the waste’s precomposting period. Final vermicomposts pathogen content was reduced and varied according to precomposting period. Vermicomposts from wastes precomposted for over two weeks were less stabilized, less humified and had less nutrient contents compared to vermicomposts from wastes that were precomposted for one week or less. The findings suggest that a precomposting period of one week is ideal for the effective vermicomposting of dairy manure-waste paper mixtures. Results of the P enrichment study indicated an increase in the inorganic phosphate and a reduction in the organic phosphate fractions of dairy manure-waste paper vermicompost that were enriched with PR. This implied an increase in mineralization of organic matter and or solubilization of PR with vermicomposting time. Applying PR to dairy manure-waste paper mixtures also enhanced degradation and had increased N and P contents of dairy manure-waste paper vermicomposts. Earthworms accumulated heavy metals in their bodies and reduced heavy metal contents of vermicomposts. A study to determine the physicochemical properties of vermicompost substituted pine bark compost and performance of resultant growing medium on plant growth and nutrient uptake was done. Results obtained revealed that increasing proportions of dairy manure vermicomposts in pine bark compost improved tomato plant height, stem girth, shoot and root dry weights. v Tomatoes grew best in the 40 to 60% CV substituted pine bark and application of Horticote (7:2:1 (22)) fertilizer significantly increased plant growth in all media. Progressive substitution pine bark with dairy manure vermicomposts resulted in a decrease in the percentage total porosity, percentage air space whilst bulk density, water holding capacity, particle density, pH, electrical conductivity and N and P levels increased. Precomposting wastes not only reduced and or eliminated pathogens but also improved the stabilisation and nutrient content of dairy manure waste paper mixtures. The application of PR to dairy manure waste paper mixtures improved the chemical and physical properties of vermicomposts. Earthworms bio-accumulated the heavy metals Cd, Cr, Cu, Pb and Zn whilst the contents of these in the vermicomposts declined. It is, therefore, recommended that dairy manure waste paper mixtures be precomposted for one week for sanitization followed by PR application and vermicomposting for stabilization and improved nutrients contents of resultant vermicomposts. Substitution of pine bark compost with 40 to 60 % PR-enriched vermicompost produced a growing medium with superior physical and chemical properties which supported good seedling growth. However, for optimum seedling growth, supplementation with mineral fertilizer was found to be necessary.
- Full Text:
- Date Issued: 2010
- Authors: Mupondi, Lushian Tapiwa
- Date: 2010
- Subjects: Compost , Vermicomposting , Manures , Biodegradation , Waste paper -- South Africa -- Eastern Cape , Thermophilic bacteria , Fertilizers
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11961 , http://hdl.handle.net/10353/411 , Compost , Vermicomposting , Manures , Biodegradation , Waste paper -- South Africa -- Eastern Cape , Thermophilic bacteria , Fertilizers
- Description: Thermophilic composting (TC) and vermicomposting (V) are the two most common methods used for biological stabilization of solid organic wastes. Both have their advantages and disadvantages but the proposed method of combining composting and vermicomposting (CV) borrows pertinent attributes from each of the two methods and combines them to enhance overall process and product qualities. Dairy manure and waste paper are two wastes produced in large quantities at the University of Fort Hare. The study was carried out to address the following specific objectives, to determine (i) the effectiveness of combined thermophilic composting and vermicomposting on the biodegradation and sanitization of mixtures of dairy manure and paper waste, (ii) an optimum precomposting period for dairy manure paper waste mixtures that results in vermicomposts of good nutritional quality and whose use will not jeopardize human health, (iii) the effectiveness of phosphate rock (PR) in increasing available P and degradation and nutrient content of dairy manure-paper vermicomposts, (iv) the physicochemical properties of vermicompost substituted pine bark compost and performance of resultant growing medium on plant growth and nutrient uptake. Results of this study revealed that wastes with a C: N ratio of 30 were more suitable for both V and CV as their composts were more stabilized and with higher nutrient contents than composts made from wastes with a C: N ratio of 45. Both V and CV were effective methods for the biodegradation of dairy manure and paper waste mixtures with C: N ratio of 30 but the latter was more effective in the biodegradation of waste mixtures with a C: N ratio of 45. The combinination of composting and vermicomposting eliminated the indicator pathogen E. coli 0157 from the final composts whereas V only managed to reduce the pathogen population. iv A follow up study was done to determine the effects of precomposting on pathogen numbers so as to come up with a suitable precomposting period to use when combine composting dairy manure-waste paper mixtures. Results of this study showed that over 95% of fecal coliforms, E. coli and of E. coli 0157 were eliminated from the wastes within one week of precomposting and total elimination of these and protozoan (oo)cysts achieved after 3 weeks of precomposting. The vermicomposts pathogen content was related to the waste’s precomposting period. Final vermicomposts pathogen content was reduced and varied according to precomposting period. Vermicomposts from wastes precomposted for over two weeks were less stabilized, less humified and had less nutrient contents compared to vermicomposts from wastes that were precomposted for one week or less. The findings suggest that a precomposting period of one week is ideal for the effective vermicomposting of dairy manure-waste paper mixtures. Results of the P enrichment study indicated an increase in the inorganic phosphate and a reduction in the organic phosphate fractions of dairy manure-waste paper vermicompost that were enriched with PR. This implied an increase in mineralization of organic matter and or solubilization of PR with vermicomposting time. Applying PR to dairy manure-waste paper mixtures also enhanced degradation and had increased N and P contents of dairy manure-waste paper vermicomposts. Earthworms accumulated heavy metals in their bodies and reduced heavy metal contents of vermicomposts. A study to determine the physicochemical properties of vermicompost substituted pine bark compost and performance of resultant growing medium on plant growth and nutrient uptake was done. Results obtained revealed that increasing proportions of dairy manure vermicomposts in pine bark compost improved tomato plant height, stem girth, shoot and root dry weights. v Tomatoes grew best in the 40 to 60% CV substituted pine bark and application of Horticote (7:2:1 (22)) fertilizer significantly increased plant growth in all media. Progressive substitution pine bark with dairy manure vermicomposts resulted in a decrease in the percentage total porosity, percentage air space whilst bulk density, water holding capacity, particle density, pH, electrical conductivity and N and P levels increased. Precomposting wastes not only reduced and or eliminated pathogens but also improved the stabilisation and nutrient content of dairy manure waste paper mixtures. The application of PR to dairy manure waste paper mixtures improved the chemical and physical properties of vermicomposts. Earthworms bio-accumulated the heavy metals Cd, Cr, Cu, Pb and Zn whilst the contents of these in the vermicomposts declined. It is, therefore, recommended that dairy manure waste paper mixtures be precomposted for one week for sanitization followed by PR application and vermicomposting for stabilization and improved nutrients contents of resultant vermicomposts. Substitution of pine bark compost with 40 to 60 % PR-enriched vermicompost produced a growing medium with superior physical and chemical properties which supported good seedling growth. However, for optimum seedling growth, supplementation with mineral fertilizer was found to be necessary.
- Full Text:
- Date Issued: 2010