A preliminary study on the effects of elevated CO2 on aphid resistance of Tugela Dn and the population dynamics of the Russian wheat aphid (Homoptera: Aphididae), Diuraphis noxia
- Authors: Mundondo, Daphine
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Biochemistry)
- Identifier: vital:11402 , http://hdl.handle.net/10353/d1020244
- Description: Food security is of major importance due to the increasing world population with 8.9 billion people expected by 2050 (Cohen, 2003). Diuraphis noxia (RWA), have caused aggravating, massive losses to wheat farmers in many areas of the world. If unchecked, RWA are able to destroy plants resulting in major economic impacts (Botha, 2013). Due to ineffective use of other control methods, the Small Grains Institute in Bethlehem, South Africa, have therefore developed resistant cultivars to the known RWA subtypes over the past decades through intensive breeding programmes (Tolmay et al., 2006). Climate change has however become a major factor threatening food security especially with the observed increase in CO2 from less than 300 ppm in pre-industrial period to the current 385 ppm and is predicted to reach 550 ppm by 2050 (IPCC, 2007; Meehl et al., 2007). Elevated CO2 concentration may affect individual species of a community hence the need to understand the wheat-aphid interactions. In this study, population growth rates and virulence of RWA SA1 at ambient (385 ppm) and elevated (450 ppm) CO2 concentration were evaluated on two wheat cultivars: Tugela Dn (resistant) and Scheepers (susceptible). Fluorescence microscopy techniques using aniline blue were used to investigate feeding related damage caused by RWA SA1 through an examination of callose deposition at the two CO2 concentration. A two-dimensional gel electrophoresis method was developed in order to determine the effect of RWA SA1 on the wheat cultivars proteome at the two CO2 concentration. Differentially expressed proteins that were up or down regulated more than two fold were identified using PDQuestTM Basic 2D Gel analysis software. Populations of RWA SA1 increased significantly on the two wheat cultivars at both CO2 concentration. Although the population growth rate for RWA SA1 on both cultivars was generally exponential at all treatments, growth at elevated CO2 concentration was noticeably faster with populations increasing 3 fold in 14 days as compared to the 2 times at ambient CO2 concentration. Hence, both cultivars provided a better quality host for RWA SA1 at 450 ppm than 385 ppm. There was no significant difference between RWA SA1 population on Tugela Dn and on Scheepers at elevated CO2 concentration on day 14 after infestation which means there was a change in the resistance mechanism in Tugela Dn at this condition. Approximately 70% of the total leaf showed chlorosis by 21 days of aphid infestation for both cultivars although the susceptible cultivar was more vulnerable. There was low callose deposition in the controls (uninfested plants) but heavy callose in infested plants due to aphid feeding. A proteomics approach was used as a pilot study to investigate whether it would be possible to identify the changes in the resistance mechanism during aphid infestation under elevated CO2 levels. The major changes in the proteome of the control group (uninfested Tugela Dn at ambient versus elevated CO2 concentration) occurred in the early events (day 1-7) in the molecular weight range of approximately 25 kDa to 55 kDa are mainly within the basic to neutral pH range. This was suggested to be a result of mechanisms to adjust to the CO2 concentration. Elevated CO2 results in instant higher photosynthetic rates and C:N ratios as well as changes in expression levels of SA-dependant defense genes (Lindroth 1995; Hughes and Bazzaz, 2001; Sun et al., 2013). Because most of these changes are directly regulated by proteins, it is expected that the most differential protein expression will occur immediately after the atmospheric changes (early events) as was shown in the study. Infested plants under elevated and ambient conditions showed that the stress conditions gave rise to differentially regulated proteins within the wheat proteome. Most changes occurred elevated CO2 levels. It can be suggested that the changes were a result of differentially regulated plant defence proteins which fall in this range (25 kDa - 80 kDa) such as peroxidases, chitinases and β-1.3-glucanases as well as protein kinases, heat-shock proteins and photosynthetic proteins. These results indicate that there has been changes in the resistance due to elevated CO2 because of the evident changes in the proteome. If so, then the results will be similar to those documented by Louw (2007) where up-regulation was due to putative storage proteins, proteins involved in photosynthesis, heat shock proteins and defense proteins. Of course, the pI value and molecular mass of the proteins and the identification of the proteins in these spots, must be determined in future work to specifically identify whether these suggestions are authentic. However, Louw (2007) also reports that the susceptible Betta wheat cultivar, displayed a defence response similar to the HR although it was unable to up-regulate specific defensive proteins against RWA infestation but proteins for broad resistance. Although the changes in the proteins in infested Tugela Dn under elevated CO2 concentration were not accurately identified, the defense mechanism is similar to that portrayed by the susceptible Betta wheat cultivar which shows that the resistance mechanism had been overcome. Because this was a pilot study and preliminary results were obtained due to limited funding and time constraints, suggestions were made on how to further develop the method to obtain statistically significant results.
- Full Text:
- Date Issued: 2015
- Authors: Mundondo, Daphine
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Biochemistry)
- Identifier: vital:11402 , http://hdl.handle.net/10353/d1020244
- Description: Food security is of major importance due to the increasing world population with 8.9 billion people expected by 2050 (Cohen, 2003). Diuraphis noxia (RWA), have caused aggravating, massive losses to wheat farmers in many areas of the world. If unchecked, RWA are able to destroy plants resulting in major economic impacts (Botha, 2013). Due to ineffective use of other control methods, the Small Grains Institute in Bethlehem, South Africa, have therefore developed resistant cultivars to the known RWA subtypes over the past decades through intensive breeding programmes (Tolmay et al., 2006). Climate change has however become a major factor threatening food security especially with the observed increase in CO2 from less than 300 ppm in pre-industrial period to the current 385 ppm and is predicted to reach 550 ppm by 2050 (IPCC, 2007; Meehl et al., 2007). Elevated CO2 concentration may affect individual species of a community hence the need to understand the wheat-aphid interactions. In this study, population growth rates and virulence of RWA SA1 at ambient (385 ppm) and elevated (450 ppm) CO2 concentration were evaluated on two wheat cultivars: Tugela Dn (resistant) and Scheepers (susceptible). Fluorescence microscopy techniques using aniline blue were used to investigate feeding related damage caused by RWA SA1 through an examination of callose deposition at the two CO2 concentration. A two-dimensional gel electrophoresis method was developed in order to determine the effect of RWA SA1 on the wheat cultivars proteome at the two CO2 concentration. Differentially expressed proteins that were up or down regulated more than two fold were identified using PDQuestTM Basic 2D Gel analysis software. Populations of RWA SA1 increased significantly on the two wheat cultivars at both CO2 concentration. Although the population growth rate for RWA SA1 on both cultivars was generally exponential at all treatments, growth at elevated CO2 concentration was noticeably faster with populations increasing 3 fold in 14 days as compared to the 2 times at ambient CO2 concentration. Hence, both cultivars provided a better quality host for RWA SA1 at 450 ppm than 385 ppm. There was no significant difference between RWA SA1 population on Tugela Dn and on Scheepers at elevated CO2 concentration on day 14 after infestation which means there was a change in the resistance mechanism in Tugela Dn at this condition. Approximately 70% of the total leaf showed chlorosis by 21 days of aphid infestation for both cultivars although the susceptible cultivar was more vulnerable. There was low callose deposition in the controls (uninfested plants) but heavy callose in infested plants due to aphid feeding. A proteomics approach was used as a pilot study to investigate whether it would be possible to identify the changes in the resistance mechanism during aphid infestation under elevated CO2 levels. The major changes in the proteome of the control group (uninfested Tugela Dn at ambient versus elevated CO2 concentration) occurred in the early events (day 1-7) in the molecular weight range of approximately 25 kDa to 55 kDa are mainly within the basic to neutral pH range. This was suggested to be a result of mechanisms to adjust to the CO2 concentration. Elevated CO2 results in instant higher photosynthetic rates and C:N ratios as well as changes in expression levels of SA-dependant defense genes (Lindroth 1995; Hughes and Bazzaz, 2001; Sun et al., 2013). Because most of these changes are directly regulated by proteins, it is expected that the most differential protein expression will occur immediately after the atmospheric changes (early events) as was shown in the study. Infested plants under elevated and ambient conditions showed that the stress conditions gave rise to differentially regulated proteins within the wheat proteome. Most changes occurred elevated CO2 levels. It can be suggested that the changes were a result of differentially regulated plant defence proteins which fall in this range (25 kDa - 80 kDa) such as peroxidases, chitinases and β-1.3-glucanases as well as protein kinases, heat-shock proteins and photosynthetic proteins. These results indicate that there has been changes in the resistance due to elevated CO2 because of the evident changes in the proteome. If so, then the results will be similar to those documented by Louw (2007) where up-regulation was due to putative storage proteins, proteins involved in photosynthesis, heat shock proteins and defense proteins. Of course, the pI value and molecular mass of the proteins and the identification of the proteins in these spots, must be determined in future work to specifically identify whether these suggestions are authentic. However, Louw (2007) also reports that the susceptible Betta wheat cultivar, displayed a defence response similar to the HR although it was unable to up-regulate specific defensive proteins against RWA infestation but proteins for broad resistance. Although the changes in the proteins in infested Tugela Dn under elevated CO2 concentration were not accurately identified, the defense mechanism is similar to that portrayed by the susceptible Betta wheat cultivar which shows that the resistance mechanism had been overcome. Because this was a pilot study and preliminary results were obtained due to limited funding and time constraints, suggestions were made on how to further develop the method to obtain statistically significant results.
- Full Text:
- Date Issued: 2015
A privacy management framework for mobile personal electronic health records in South Africa
- Authors: Els, Floyd Nathaniel
- Date: 2017
- Subjects: Medical records -- Data processing Medical records -- Access control Electronic records -- Security measures
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/12733 , vital:39316
- Description: South Africa’s health status is in constant dismay, especially while under the strain of the quadruple burden of disease. The adoption of personal electronic health records (PEHRs) can be seen as a means to improve this status by empowering patients to manage their health and lifestyle better. While from the healthcare provider’s perspective, PEHRs has the ability to reduce medical errors; provide better communication channels and enhance the monitoring of patients. Despite these benefits for both healthcare providers and patients, there are three distinct information security threats relating to PEHRs. These threats refer to the individual, data in transit, and at rest. South Africa is still considered to be inexperienced with PEHRs, and consider it a relatively new concept to the healthcare system. The National e-Health Strategy and Protection of Personal Information Bill were discussed and compared to international standards in order to ascertain South Africa’s current standing on mobile healthcare privacy. However, there are no specific privacy and security controls in place to protect patients that access personal electronic health records through mobile devices. Therefore, the aim of this study is the development of a privacy management framework (PMF) to mitigate these privacy concerns. Following an interpretivistic approach to research, qualitative data was analysed from literature, and the privacy framework evaluated through expert reviews. The proposed PMF consists of 3 tiers, beginning with the top tier. The first tier relates to an organisations interpretation and understanding of data privacy laws and regulations, and in ensuring compliance with these laws. The second tier refers to two support pillars to maintain the first tier. These pillars are based on elements of operational privacy, as well as auditing and reviewing. The third tier serves as the basic foundation upon which the PMF was developed. It is mainly focused with creating privacy awareness amongst healthcare providers and patients by creating: training regimes on security and privacy threats, efficient communication standards, and constant ongoing support from top level management.
- Full Text:
- Date Issued: 2017
- Authors: Els, Floyd Nathaniel
- Date: 2017
- Subjects: Medical records -- Data processing Medical records -- Access control Electronic records -- Security measures
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10353/12733 , vital:39316
- Description: South Africa’s health status is in constant dismay, especially while under the strain of the quadruple burden of disease. The adoption of personal electronic health records (PEHRs) can be seen as a means to improve this status by empowering patients to manage their health and lifestyle better. While from the healthcare provider’s perspective, PEHRs has the ability to reduce medical errors; provide better communication channels and enhance the monitoring of patients. Despite these benefits for both healthcare providers and patients, there are three distinct information security threats relating to PEHRs. These threats refer to the individual, data in transit, and at rest. South Africa is still considered to be inexperienced with PEHRs, and consider it a relatively new concept to the healthcare system. The National e-Health Strategy and Protection of Personal Information Bill were discussed and compared to international standards in order to ascertain South Africa’s current standing on mobile healthcare privacy. However, there are no specific privacy and security controls in place to protect patients that access personal electronic health records through mobile devices. Therefore, the aim of this study is the development of a privacy management framework (PMF) to mitigate these privacy concerns. Following an interpretivistic approach to research, qualitative data was analysed from literature, and the privacy framework evaluated through expert reviews. The proposed PMF consists of 3 tiers, beginning with the top tier. The first tier relates to an organisations interpretation and understanding of data privacy laws and regulations, and in ensuring compliance with these laws. The second tier refers to two support pillars to maintain the first tier. These pillars are based on elements of operational privacy, as well as auditing and reviewing. The third tier serves as the basic foundation upon which the PMF was developed. It is mainly focused with creating privacy awareness amongst healthcare providers and patients by creating: training regimes on security and privacy threats, efficient communication standards, and constant ongoing support from top level management.
- Full Text:
- Date Issued: 2017
A process maturity framework of information security policy development life cycle
- Authors: Tuyikeze, Tite
- Date: 2014-12
- Subjects: Computer security , Information technology , Computer crimes
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/26797 , vital:66010
- Description: Information security policy development involves more than policy formulation and implementation. Unless organisations explicitly recognise the various steps required in the development of a security policy, they run the risk of developing policies that are poorly thought out, incomplete, redundant and, irrelevant and which will not be fully supported by the users. This study argues that an information security policy has an entire life cycle through which it must pass through during its useful lifetime. A content analysis on information security policy development methods was conducted using secondary sources in the relevant literature. The outcome of the content analysis resulted in the proposal of a framework of information security policy development and implementation. The proposed framework outlines the various steps required in the development, implementation and enforcement of an effective information security policy. A survey of 400 security professionals was conducted in order to evaluate the concepts contained in the framework.This study also emphasises the importance of integrating a security maturity assessment process into the information security policy development life cycle. A key finding of this study is the proposed maturity assessment framework which offers a structured methodology for evaluating the maturity level of an information security policy. The framework presents an integrated and holistic approach to ensure the incremental process maturity of the organisation’s information security policy development process. In addition, organisations using the proposed framework will be able both to determine the current maturity levels of their information security policy development process and also to plan enhancements in the correct sequence. , Thesis (PhD) -- Faculty of Management and Commerce, 2014
- Full Text:
- Date Issued: 2014-12
- Authors: Tuyikeze, Tite
- Date: 2014-12
- Subjects: Computer security , Information technology , Computer crimes
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10353/26797 , vital:66010
- Description: Information security policy development involves more than policy formulation and implementation. Unless organisations explicitly recognise the various steps required in the development of a security policy, they run the risk of developing policies that are poorly thought out, incomplete, redundant and, irrelevant and which will not be fully supported by the users. This study argues that an information security policy has an entire life cycle through which it must pass through during its useful lifetime. A content analysis on information security policy development methods was conducted using secondary sources in the relevant literature. The outcome of the content analysis resulted in the proposal of a framework of information security policy development and implementation. The proposed framework outlines the various steps required in the development, implementation and enforcement of an effective information security policy. A survey of 400 security professionals was conducted in order to evaluate the concepts contained in the framework.This study also emphasises the importance of integrating a security maturity assessment process into the information security policy development life cycle. A key finding of this study is the proposed maturity assessment framework which offers a structured methodology for evaluating the maturity level of an information security policy. The framework presents an integrated and holistic approach to ensure the incremental process maturity of the organisation’s information security policy development process. In addition, organisations using the proposed framework will be able both to determine the current maturity levels of their information security policy development process and also to plan enhancements in the correct sequence. , Thesis (PhD) -- Faculty of Management and Commerce, 2014
- Full Text:
- Date Issued: 2014-12
A programme of academic support for students at the public nursing college of the Eastern Cape Province in South Africa
- Senti, Nomandithini Innocent
- Authors: Senti, Nomandithini Innocent
- Date: 2018
- Subjects: Nursing -- Study and teaching Nursing -- Study and teaching -- Simulation methods
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/10997 , vital:36128
- Description: A comprehensive academic support at the public nursing college is important. Despite this, there is no such support in public nursing colleges in the Eastern Cape Province of South Africa. The aim of the study was to develop an academic support programme for students in order to improve their success in Higher Education. The study endeavoured to answer the following questions: What are the academic support needs of students at the public nursing college in the Eastern Cape of South Africa? What conceptual framework can be developed for the academic support programme of students? What academic support programme can be developed for students at the public nursing college? What guidelines can be developed for implementation of academic support programme of students? The objectives were: to describe academic support needs of students at the public nursing college in the eastern Cape Province of South Africa; to develop a conceptual framework for the academic support programme for students at the public nursing college in the Eastern Cape of South Africa; to develop an academic support programme for students at the public nursing college in the Eastern Cape in south Africa and lastly to describe guidelines for implementation and evaluation of the academic support programme. The research design used in this study was quantitative, qualitative, descriptive, evaluative, and theory generation. The study was conducted according to four phases. Phase one focussed on academic supports needs of the student. Phase two focussed on development of conceptual framework for the students at the public nursing college in Eastern Cape Province. Phase three focussed on the development of the academic support programme for the students, whereas phase four focussed on description of guidelines for implementation and evaluation of the academic support programme. The population of the study consisted of students undergoing training in a four-year programme at the Public Nursing College. The target population was the students in the same programme from level one to level four of training. The sampling technique used was a probability sampling with multi-stage and cluster sampling techniques being utilized. The total sample was n=333 participants. A quantitative self-developed questionnaire was used to collect empirical data. The questionnaire consisted of eight sections. Descriptive data was analysed using Statistic Package of Social Sciences (SPSS) version 24. Exploratory factor analysis was conducted on the descriptive data collected in phase one. Concept analysis and identification were done through the utilisation of exploratory factor analysis. The conceptual framework for the academic support programme was identified through the analysed factors. Fifteen factors were derived from the descriptive data. The conceptual framework of the academic support programme discussed in Chapter 5 was used also in the development of the academic support programme. It is in this chapter that assumptions, context, stakeholders, process, outcome, dynamics and, lastly, the recipient were discussed, along with a description of the programme. The programme was evaluated in accordance with the criteria for programme evaluation. The recommendations brought forward for the academic support programme were: The guidelines have to be tested for the implementation of the programme; benchmarking should be done to compare with other institutions of higher learning regarding their academic support programmes; an academic brochure regarding academic support must be available in the college and should be given to students on arrival as part of a package; and neutral researcher should conduct the same research in the same college.
- Full Text:
- Date Issued: 2018
- Authors: Senti, Nomandithini Innocent
- Date: 2018
- Subjects: Nursing -- Study and teaching Nursing -- Study and teaching -- Simulation methods
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: http://hdl.handle.net/10353/10997 , vital:36128
- Description: A comprehensive academic support at the public nursing college is important. Despite this, there is no such support in public nursing colleges in the Eastern Cape Province of South Africa. The aim of the study was to develop an academic support programme for students in order to improve their success in Higher Education. The study endeavoured to answer the following questions: What are the academic support needs of students at the public nursing college in the Eastern Cape of South Africa? What conceptual framework can be developed for the academic support programme of students? What academic support programme can be developed for students at the public nursing college? What guidelines can be developed for implementation of academic support programme of students? The objectives were: to describe academic support needs of students at the public nursing college in the eastern Cape Province of South Africa; to develop a conceptual framework for the academic support programme for students at the public nursing college in the Eastern Cape of South Africa; to develop an academic support programme for students at the public nursing college in the Eastern Cape in south Africa and lastly to describe guidelines for implementation and evaluation of the academic support programme. The research design used in this study was quantitative, qualitative, descriptive, evaluative, and theory generation. The study was conducted according to four phases. Phase one focussed on academic supports needs of the student. Phase two focussed on development of conceptual framework for the students at the public nursing college in Eastern Cape Province. Phase three focussed on the development of the academic support programme for the students, whereas phase four focussed on description of guidelines for implementation and evaluation of the academic support programme. The population of the study consisted of students undergoing training in a four-year programme at the Public Nursing College. The target population was the students in the same programme from level one to level four of training. The sampling technique used was a probability sampling with multi-stage and cluster sampling techniques being utilized. The total sample was n=333 participants. A quantitative self-developed questionnaire was used to collect empirical data. The questionnaire consisted of eight sections. Descriptive data was analysed using Statistic Package of Social Sciences (SPSS) version 24. Exploratory factor analysis was conducted on the descriptive data collected in phase one. Concept analysis and identification were done through the utilisation of exploratory factor analysis. The conceptual framework for the academic support programme was identified through the analysed factors. Fifteen factors were derived from the descriptive data. The conceptual framework of the academic support programme discussed in Chapter 5 was used also in the development of the academic support programme. It is in this chapter that assumptions, context, stakeholders, process, outcome, dynamics and, lastly, the recipient were discussed, along with a description of the programme. The programme was evaluated in accordance with the criteria for programme evaluation. The recommendations brought forward for the academic support programme were: The guidelines have to be tested for the implementation of the programme; benchmarking should be done to compare with other institutions of higher learning regarding their academic support programmes; an academic brochure regarding academic support must be available in the college and should be given to students on arrival as part of a package; and neutral researcher should conduct the same research in the same college.
- Full Text:
- Date Issued: 2018
A psychobiography of Archbishop Emeritus Desmond Mpilo Tutu
- Authors: Eliastam, Liesl Marijke
- Date: 2011
- Subjects: Developmental psychology , Life cycle, Human -- Psychological aspects , Psychology -- Biographical methods , Personality -- Research -- Methodology , Emotional intelligence
- Language: English
- Type: Thesis , Masters , M Soc Sc (C Psy)
- Identifier: vital:11856 , http://hdl.handle.net/10353/537 , Developmental psychology , Life cycle, Human -- Psychological aspects , Psychology -- Biographical methods , Personality -- Research -- Methodology , Emotional intelligence
- Description: Psychobiographies offer the illuminating experience of uncovering the story of an individual’s life through the lens of a psychological theory. Psychobiographies offer the chance to gain a deeper understanding of what makes that individual unique. This study aimed to explore and describe the emotional intelligence of Archbishop Emeritus Desmond Tutu according to Goleman’s (1998) theory of Emotional Intelligence. Tutu was chosen as a subject for this study because of his extraordinary life and accomplishments, and because he is regarded as a prominent figure of moral leadership in South Africa. A qualitative psychobiographical research method was utilised. Data was collected from both primary and secondary sources to enhance internal validity, and was then analysed according to Miles and Huberman’s (1994) approach. The findings suggest that Tutu applied all of the twenty five emotional intelligence capacities during his life, and that at times, some were used more extensively than others. This study is groundbreaking in that it is the first psychobiography on Desmond Tutu, and it is the first psychobiography undertaken at the University of Fort Hare. Psychobiographies offer an opportunity to evaluate the psychological theory which is applied. It was found that Goleman’s (1998) theory of Emotional Intelligence is supported by this study.
- Full Text:
- Date Issued: 2011
- Authors: Eliastam, Liesl Marijke
- Date: 2011
- Subjects: Developmental psychology , Life cycle, Human -- Psychological aspects , Psychology -- Biographical methods , Personality -- Research -- Methodology , Emotional intelligence
- Language: English
- Type: Thesis , Masters , M Soc Sc (C Psy)
- Identifier: vital:11856 , http://hdl.handle.net/10353/537 , Developmental psychology , Life cycle, Human -- Psychological aspects , Psychology -- Biographical methods , Personality -- Research -- Methodology , Emotional intelligence
- Description: Psychobiographies offer the illuminating experience of uncovering the story of an individual’s life through the lens of a psychological theory. Psychobiographies offer the chance to gain a deeper understanding of what makes that individual unique. This study aimed to explore and describe the emotional intelligence of Archbishop Emeritus Desmond Tutu according to Goleman’s (1998) theory of Emotional Intelligence. Tutu was chosen as a subject for this study because of his extraordinary life and accomplishments, and because he is regarded as a prominent figure of moral leadership in South Africa. A qualitative psychobiographical research method was utilised. Data was collected from both primary and secondary sources to enhance internal validity, and was then analysed according to Miles and Huberman’s (1994) approach. The findings suggest that Tutu applied all of the twenty five emotional intelligence capacities during his life, and that at times, some were used more extensively than others. This study is groundbreaking in that it is the first psychobiography on Desmond Tutu, and it is the first psychobiography undertaken at the University of Fort Hare. Psychobiographies offer an opportunity to evaluate the psychological theory which is applied. It was found that Goleman’s (1998) theory of Emotional Intelligence is supported by this study.
- Full Text:
- Date Issued: 2011
A Psychobiography of the late Milase Jumartha Majola (néé Moyake)- 1932 - 2021
- Authors: Mbambo-Tom, Thembeka Esther
- Date: 2022-10
- Subjects: Grahamstown (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27640 , vital:69379
- Description: This study is a psychobiography of a Black South African Woman, Milase Jumartha Majola (néé Moyake), herein fondly referred to as ‘Mrs Majola’. Mrs Majola is not an icon in the general sense, but yet a definite unsung hero for many in her community. In her 89 years, she has touched many people’s lives and left a vast imprint in the community. Mrs Majola has been identified as a psychobiographical subject for this study based on her exemplary and extraordinary endeavours, which contributed significantly to the psycho-social well-being of the youth and the elderly within Port Elizabeth townships (now known as Gqeberha). The main objective of this study was to explore and describe Mrs Majola’s psychosocial development. Her psycho-social development was studied through the PERMA Theory of well-being lens and transformed into a narrative to understand better what made her a remarkable individual. Data was gathered from primary and secondary sources to enrich the psychobiography and qualitatively analysed. The findings show that Mrs Majola could balance her life in a way supported by the PERMA Theory of well-being. Results demonstrate her ability to understand and manage her Positive (negative) emotions, Engagements, Relationships, Meaningfulness, and Accomplishments as a mother, co-worker and community leader, which created numerous success stories during her tenure. Even though Mrs Majola experienced many hardships in life, such as losing her husband at the young age of 39, she always stayed positive and successfully used her inner strength to motivate her to keep living her purpose in life. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2022
- Full Text:
- Date Issued: 2022-10
- Authors: Mbambo-Tom, Thembeka Esther
- Date: 2022-10
- Subjects: Grahamstown (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/27640 , vital:69379
- Description: This study is a psychobiography of a Black South African Woman, Milase Jumartha Majola (néé Moyake), herein fondly referred to as ‘Mrs Majola’. Mrs Majola is not an icon in the general sense, but yet a definite unsung hero for many in her community. In her 89 years, she has touched many people’s lives and left a vast imprint in the community. Mrs Majola has been identified as a psychobiographical subject for this study based on her exemplary and extraordinary endeavours, which contributed significantly to the psycho-social well-being of the youth and the elderly within Port Elizabeth townships (now known as Gqeberha). The main objective of this study was to explore and describe Mrs Majola’s psychosocial development. Her psycho-social development was studied through the PERMA Theory of well-being lens and transformed into a narrative to understand better what made her a remarkable individual. Data was gathered from primary and secondary sources to enrich the psychobiography and qualitatively analysed. The findings show that Mrs Majola could balance her life in a way supported by the PERMA Theory of well-being. Results demonstrate her ability to understand and manage her Positive (negative) emotions, Engagements, Relationships, Meaningfulness, and Accomplishments as a mother, co-worker and community leader, which created numerous success stories during her tenure. Even though Mrs Majola experienced many hardships in life, such as losing her husband at the young age of 39, she always stayed positive and successfully used her inner strength to motivate her to keep living her purpose in life. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2022
- Full Text:
- Date Issued: 2022-10
A public safety, participatory crowdsourcing smart city model for a developing country
- Authors: Cilliers, Liezel
- Date: 2014
- Language: English
- Type: Thesis , Masters , MCom (Information Systems)
- Identifier: vital:11144 , http://hdl.handle.net/10353/d1015305
- Description: Worldwide the population in cities is increasing. It is the responsibility of local government to provide public safety services in order to ensure the safety of their citizens and, yet, the local government often have inadequate resources to do this. ‘Smart Cities’ is a new and innovative concept that has emerged during the past few years and which involves using current infrastructure and resources more effectively and efficiently. One of the methods used to collect data in a smart city is participatory crowdsourcing but, in order to ensure effectiveness and efficiency, it is essential that a large amount of data be collected from the participants in such a project, who are generally citizens residing in the city. This study was conducted in the city of East London, which is part of the Buffalo City Metropolitan Municipality (BCMM). The study made use of a Design Science approach with a mixed method data collection method. The quantitative data collection comprised a questionnaire that was completed by 394 participants, while the qualitative data collection included a detailed literature review, conversational analysis and observations arising from the building of the crowdsourcing system prototype. The design artefact produced by this research is a model based on the literature, conversational analysis and the principles and concepts learnt from the prototype. Thus, this model represents what must be incorporated in the prototype to assist with the implementation of a public safety, participatory crowdsourcing smart city in a developing country. The model includes three areas ‒ the crowdsourcing system, the city (Buffalo City Metropolitan Municipality) and the citizens of East London. The crowdsourcing system incorporates factors of information security, specifically the CIA triad, and the usability of the crowdsourcing system. Usability includes characteristics such as the quality of the system and interface, as well as the usefulness of the public safety, participatory crowdsourcing system which was used to measure the confidence of the East London citizens in the system. Three steps were identified in the literature as being necessary for the implementation of a smart city project by a city. These steps include the planning, development and delivery of the smart city project. Finally, the trustworthiness of the public safety participatory crowdsourcing system is determined by the ability, reliability and benevolence of the system. These three characteristics were included in the citizen factor of the model.
- Full Text:
- Date Issued: 2014
- Authors: Cilliers, Liezel
- Date: 2014
- Language: English
- Type: Thesis , Masters , MCom (Information Systems)
- Identifier: vital:11144 , http://hdl.handle.net/10353/d1015305
- Description: Worldwide the population in cities is increasing. It is the responsibility of local government to provide public safety services in order to ensure the safety of their citizens and, yet, the local government often have inadequate resources to do this. ‘Smart Cities’ is a new and innovative concept that has emerged during the past few years and which involves using current infrastructure and resources more effectively and efficiently. One of the methods used to collect data in a smart city is participatory crowdsourcing but, in order to ensure effectiveness and efficiency, it is essential that a large amount of data be collected from the participants in such a project, who are generally citizens residing in the city. This study was conducted in the city of East London, which is part of the Buffalo City Metropolitan Municipality (BCMM). The study made use of a Design Science approach with a mixed method data collection method. The quantitative data collection comprised a questionnaire that was completed by 394 participants, while the qualitative data collection included a detailed literature review, conversational analysis and observations arising from the building of the crowdsourcing system prototype. The design artefact produced by this research is a model based on the literature, conversational analysis and the principles and concepts learnt from the prototype. Thus, this model represents what must be incorporated in the prototype to assist with the implementation of a public safety, participatory crowdsourcing smart city in a developing country. The model includes three areas ‒ the crowdsourcing system, the city (Buffalo City Metropolitan Municipality) and the citizens of East London. The crowdsourcing system incorporates factors of information security, specifically the CIA triad, and the usability of the crowdsourcing system. Usability includes characteristics such as the quality of the system and interface, as well as the usefulness of the public safety, participatory crowdsourcing system which was used to measure the confidence of the East London citizens in the system. Three steps were identified in the literature as being necessary for the implementation of a smart city project by a city. These steps include the planning, development and delivery of the smart city project. Finally, the trustworthiness of the public safety participatory crowdsourcing system is determined by the ability, reliability and benevolence of the system. These three characteristics were included in the citizen factor of the model.
- Full Text:
- Date Issued: 2014
A qualitative assessment of the achievement of gender equality under education for all (EFA) goals : study of Lagos State, Nigeria
- Authors: Adeleke, Adawi Adeola
- Date: 2018
- Subjects: Sex discrimination in education -- Nigeria Sexism in education -- Nigeria Educational equalization -- Nigeria
- Language: English
- Type: Thesis , Doctoral , Education
- Identifier: http://hdl.handle.net/10353/9500 , vital:34357
- Description: The importance of education cannot be overemphasized. Education has been identified as the most critical instrument for empowering individuals with the necessary knowledge and skills, which can give them access to productive employment. Also, the future of a country is based on the quality of education acquired by its citizens which helps in transforming it from pre-literate to contemporary nationhood. Many international treaties and initiatives in the world have made special provisions for education as a duty of every government which must be given to every citizen as of right, irrespective of gender or social class. Amongst these international initiatives is the Education for All (EFA) Goals, a time-bound global movement towards the provision of education for every one led by the United Nations Educational, Scientific and Cultural Organization (UNESCO). There are six goals in all. This study investigated one of the EFA goals, the goal 5. The aim of the study was a qualitative assessment of the achievement of gender equality goal under the Education for All (EFA) goals, a study of Lagos State, Nigeria. The theoretical framework of the study is informed by the Social Justice Theory and the Social Justice Praxis Theory. Scholarly works and literatures on girl-child education, gender and education, and gender balancing in education were reviewed. The study followed qualitative research approach which utilizes an interpretive research paradigm that provides a collective voice from the participants. The research area was purposively selected as Lagos State being a former capital of Nigeria and still the commercial nerve centre of the nation. Although it is the smallest state in Nigeria in term of size, it remains the most populous in the country with a projected population of 20,546,999 (13.5percent Nigeria’s total population). A sample of 16 participants were purposively selected because they were the officers directly in charge of the implementation government policies on education in the State. The data was collected through in-depth recorded interview sessions and secondary data were sourced through official documents downloaded online and from Lagos State Ministry of Education. Based on the thematic analysis of the data collected, the study found out that the State government had established policies and measures to provide qualitative education for all the citizens on a non-discriminatory basis. Thus, the goal of gender parity in terms of enrollment of boys and girls has been relatively achieved in the state. However, there were still some challenges of equality in the learning process and outcome. The study therefore recommends that schools should be made attractive and conducive as possible to assist the educational attainment of any student. This could be achieved by promoting positive values and attitudes towards education, all the stakeholders in the education sector must be involved in the business of running the school. There should also be a form of resourcing and expansion of the school facilities through the Public - Private Partnership in education.
- Full Text:
- Date Issued: 2018
- Authors: Adeleke, Adawi Adeola
- Date: 2018
- Subjects: Sex discrimination in education -- Nigeria Sexism in education -- Nigeria Educational equalization -- Nigeria
- Language: English
- Type: Thesis , Doctoral , Education
- Identifier: http://hdl.handle.net/10353/9500 , vital:34357
- Description: The importance of education cannot be overemphasized. Education has been identified as the most critical instrument for empowering individuals with the necessary knowledge and skills, which can give them access to productive employment. Also, the future of a country is based on the quality of education acquired by its citizens which helps in transforming it from pre-literate to contemporary nationhood. Many international treaties and initiatives in the world have made special provisions for education as a duty of every government which must be given to every citizen as of right, irrespective of gender or social class. Amongst these international initiatives is the Education for All (EFA) Goals, a time-bound global movement towards the provision of education for every one led by the United Nations Educational, Scientific and Cultural Organization (UNESCO). There are six goals in all. This study investigated one of the EFA goals, the goal 5. The aim of the study was a qualitative assessment of the achievement of gender equality goal under the Education for All (EFA) goals, a study of Lagos State, Nigeria. The theoretical framework of the study is informed by the Social Justice Theory and the Social Justice Praxis Theory. Scholarly works and literatures on girl-child education, gender and education, and gender balancing in education were reviewed. The study followed qualitative research approach which utilizes an interpretive research paradigm that provides a collective voice from the participants. The research area was purposively selected as Lagos State being a former capital of Nigeria and still the commercial nerve centre of the nation. Although it is the smallest state in Nigeria in term of size, it remains the most populous in the country with a projected population of 20,546,999 (13.5percent Nigeria’s total population). A sample of 16 participants were purposively selected because they were the officers directly in charge of the implementation government policies on education in the State. The data was collected through in-depth recorded interview sessions and secondary data were sourced through official documents downloaded online and from Lagos State Ministry of Education. Based on the thematic analysis of the data collected, the study found out that the State government had established policies and measures to provide qualitative education for all the citizens on a non-discriminatory basis. Thus, the goal of gender parity in terms of enrollment of boys and girls has been relatively achieved in the state. However, there were still some challenges of equality in the learning process and outcome. The study therefore recommends that schools should be made attractive and conducive as possible to assist the educational attainment of any student. This could be achieved by promoting positive values and attitudes towards education, all the stakeholders in the education sector must be involved in the business of running the school. There should also be a form of resourcing and expansion of the school facilities through the Public - Private Partnership in education.
- Full Text:
- Date Issued: 2018
A qualitative evaluation of social work field instruction offered by universities in the Eastern Cape, South Africa
- Authors: Schmidt, Kim
- Date: 2013
- Subjects: Fieldwork (Educational method) -- South Africa -- Eastern Cape , Social service -- Fieldwork -- Study and teaching -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M SW
- Identifier: http://hdl.handle.net/10353/1272 , vital:26541 , Fieldwork (Educational method) -- South Africa -- Eastern Cape , Social service -- Fieldwork -- Study and teaching -- South Africa -- Eastern Cape
- Description: This research study describes an evaluation of social work field instruction offered by universities in the Eastern Cape, South Africa. Qualitative data was collected from agency field instructors, university fieldwork coordinators and social work students. This study’s findings indicated that field instruction needs a good foundation of experiential learning that is facilitated by report writing, journal writing and agency and university supervision. Findings also indicated a need for the screening, selection and training of agency field instructors. There was also an indication that universities should develop selection procedures to ensure that the best possible students are accepted into the Bachelor of Social Work (BSW) programme. All findings indicated that field instruction programmes are most effective when there is a strong university agency partnership. The study concludes by making recommendations for future development of standards relating to field instruction programmes in the Eastern Cape and South Africa. Key words: Social work, evaluative research, field instruction, experiential learning, reflection, agency field instructor, university supervisor, university fieldwork coordinator, social work student, social work education, social work training.
- Full Text:
- Date Issued: 2013
- Authors: Schmidt, Kim
- Date: 2013
- Subjects: Fieldwork (Educational method) -- South Africa -- Eastern Cape , Social service -- Fieldwork -- Study and teaching -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , M SW
- Identifier: http://hdl.handle.net/10353/1272 , vital:26541 , Fieldwork (Educational method) -- South Africa -- Eastern Cape , Social service -- Fieldwork -- Study and teaching -- South Africa -- Eastern Cape
- Description: This research study describes an evaluation of social work field instruction offered by universities in the Eastern Cape, South Africa. Qualitative data was collected from agency field instructors, university fieldwork coordinators and social work students. This study’s findings indicated that field instruction needs a good foundation of experiential learning that is facilitated by report writing, journal writing and agency and university supervision. Findings also indicated a need for the screening, selection and training of agency field instructors. There was also an indication that universities should develop selection procedures to ensure that the best possible students are accepted into the Bachelor of Social Work (BSW) programme. All findings indicated that field instruction programmes are most effective when there is a strong university agency partnership. The study concludes by making recommendations for future development of standards relating to field instruction programmes in the Eastern Cape and South Africa. Key words: Social work, evaluative research, field instruction, experiential learning, reflection, agency field instructor, university supervisor, university fieldwork coordinator, social work student, social work education, social work training.
- Full Text:
- Date Issued: 2013
A qualitative study of the psychosocial well-being of adolescent females orphaned by HIV/AIDS in Nkonkobe Municipality
- Authors: Mahola, Mpho Nosisi
- Date: 2018
- Subjects: Children of AIDS patients Orphans -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/10818 , vital:35807
- Description: Approximately twelve million children under the age of 18 years worldwide have lost one or both parents due to HIV/AIDS. Several factors can be considered to contribute to the psychosocial well-being of HIV/AIDS orphaned teenage girls, among others, poverty, lack of social support, post-traumatic stress disorder, stigma and discrimination which have adverse consequences to the said teenager. Evidence suggests that HIV/AIDS orphaned adolescent girls may engage in relationships with older men to fund for school and other expenses and also to fulfil the need for a parental figure or emotional support, affection and attention. Against this background, this research study intended to investigate the psychosocial wellbeing of adolescent females orphaned by HIV/AIDS in the Nkonkobe Municipality. Fourteen Xhosa- speaking adolescent females between the ages of 15 and 18 years were recruited by means of snowball technique to participate in a qualitative study. Semi-structured interviews allowed sensitive issues to be discussed more easily. To ensure confidentiality and anonymity, the researcher suggested pseudonyms for the participants. This took place after the management of Isibindi Community Centre from Alice and Child Welfare from Fort Beaufort, both from the Eastern Cape, South Africa granted permission to conduct the study. The social worker from child welfare and the principal of Lingeni High School, assisted in ensuring that the participants from the two data collection sites, are organized prior the study. The researcher used Guba’s model whereby Guba and Lincoln’s model to ascertain the trustworthiness of qualitative research by following these principles; credibility, dependability, transferability and confirmability. The framework analysis which uses a thematic approach was utilized to analyse data. Meanings were formulated and they produced clusters of themes. The findings of the study revealed that HIV/AIDS orphaned adolescent females experienced grief of the loss of parents which made it difficult by deepening poverty and multifaceted challenges. Participants’ psychological well-being was impaired, subsequently they engaged in risky sexual behaviour, that is, substance abuse and multiple sexual partnership. However, an element of hardiness emanated from the participants’ personalities. They demonstrated problem-focused coping with the challenges they confront, despite the lack of consistent support structures. Their resiliency and sense of belonging owing to the nature of support from extended families ignited a sense of purpose amongst the participants. In conclusion, it is recommended that children orphaned by HIV/AIDS should be told of the cause of the death of their parents as this will make them aware of the dangers and consequences of their actions.
- Full Text:
- Date Issued: 2018
- Authors: Mahola, Mpho Nosisi
- Date: 2018
- Subjects: Children of AIDS patients Orphans -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSoc
- Identifier: http://hdl.handle.net/10353/10818 , vital:35807
- Description: Approximately twelve million children under the age of 18 years worldwide have lost one or both parents due to HIV/AIDS. Several factors can be considered to contribute to the psychosocial well-being of HIV/AIDS orphaned teenage girls, among others, poverty, lack of social support, post-traumatic stress disorder, stigma and discrimination which have adverse consequences to the said teenager. Evidence suggests that HIV/AIDS orphaned adolescent girls may engage in relationships with older men to fund for school and other expenses and also to fulfil the need for a parental figure or emotional support, affection and attention. Against this background, this research study intended to investigate the psychosocial wellbeing of adolescent females orphaned by HIV/AIDS in the Nkonkobe Municipality. Fourteen Xhosa- speaking adolescent females between the ages of 15 and 18 years were recruited by means of snowball technique to participate in a qualitative study. Semi-structured interviews allowed sensitive issues to be discussed more easily. To ensure confidentiality and anonymity, the researcher suggested pseudonyms for the participants. This took place after the management of Isibindi Community Centre from Alice and Child Welfare from Fort Beaufort, both from the Eastern Cape, South Africa granted permission to conduct the study. The social worker from child welfare and the principal of Lingeni High School, assisted in ensuring that the participants from the two data collection sites, are organized prior the study. The researcher used Guba’s model whereby Guba and Lincoln’s model to ascertain the trustworthiness of qualitative research by following these principles; credibility, dependability, transferability and confirmability. The framework analysis which uses a thematic approach was utilized to analyse data. Meanings were formulated and they produced clusters of themes. The findings of the study revealed that HIV/AIDS orphaned adolescent females experienced grief of the loss of parents which made it difficult by deepening poverty and multifaceted challenges. Participants’ psychological well-being was impaired, subsequently they engaged in risky sexual behaviour, that is, substance abuse and multiple sexual partnership. However, an element of hardiness emanated from the participants’ personalities. They demonstrated problem-focused coping with the challenges they confront, despite the lack of consistent support structures. Their resiliency and sense of belonging owing to the nature of support from extended families ignited a sense of purpose amongst the participants. In conclusion, it is recommended that children orphaned by HIV/AIDS should be told of the cause of the death of their parents as this will make them aware of the dangers and consequences of their actions.
- Full Text:
- Date Issued: 2018
A resource management framework for sustainability of rural ICT4D projects in Zimbabwe
- Authors: Mugoni, Hope
- Date: 2014
- Language: English
- Type: Thesis , Masters , MCom (Information Systems)
- Identifier: http://hdl.handle.net/10353/689 , vital:26488
- Description: Developing countries are embracing Information Communication Technologies (ICTs) as a tool for alleviating poverty. There are, however, still challenges that developing countries face in trying to establish Information Communication Technology for Development (ICT4D). Among the major challenges is the lack of proper resource management which results in poor sustainability of ICT4D initiatives. If these ICT4D initiatives are to be sustainable for the benefit of current and future generations, proper resource management methods are to be developed and applied. This study proposes a resource management framework that can be applied to the management of ICT4D resources with the aim of achieving sustainability. The framework is informed by theory, and validated through enquiry in the field. Qualitative research methodology was used as a research approach for this study where three rural ICT4D initiatives were used as case studies. The case studies were conducted in rural Zimbabwe to investigate how proper resource management can influence the sustainability of ICT4D initiatives. It was identified from the study that the lack of proper resource management methods adversely affects the initiatives’ sustainability. The proposed resource management framework will guide ICT4D resource management to enhance the initiatives’ sustainability.
- Full Text:
- Date Issued: 2014
- Authors: Mugoni, Hope
- Date: 2014
- Language: English
- Type: Thesis , Masters , MCom (Information Systems)
- Identifier: http://hdl.handle.net/10353/689 , vital:26488
- Description: Developing countries are embracing Information Communication Technologies (ICTs) as a tool for alleviating poverty. There are, however, still challenges that developing countries face in trying to establish Information Communication Technology for Development (ICT4D). Among the major challenges is the lack of proper resource management which results in poor sustainability of ICT4D initiatives. If these ICT4D initiatives are to be sustainable for the benefit of current and future generations, proper resource management methods are to be developed and applied. This study proposes a resource management framework that can be applied to the management of ICT4D resources with the aim of achieving sustainability. The framework is informed by theory, and validated through enquiry in the field. Qualitative research methodology was used as a research approach for this study where three rural ICT4D initiatives were used as case studies. The case studies were conducted in rural Zimbabwe to investigate how proper resource management can influence the sustainability of ICT4D initiatives. It was identified from the study that the lack of proper resource management methods adversely affects the initiatives’ sustainability. The proposed resource management framework will guide ICT4D resource management to enhance the initiatives’ sustainability.
- Full Text:
- Date Issued: 2014
A revenue generation model for adoption of voice telephony applications
- Authors: Mazwi, Sekelo P Lusanda
- Date: 2015-01
- Subjects: Internet telephony , Telecommunication systems
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10353/25530 , vital:64331
- Description: Amongst various Voice Telephony Applications discovered, IBM India has developed the Spoken Web which enables voice commerce capabilities that are ideally suitable for underprivileged rural communities. Admittedly, these communities are barred from fully utilising ICT enabled electronic commerce services such as the Internet for business marketing processes as a consequence of poor literacy and financial constraints. The advent of Voice Telephony Applications aids accessibility and participation of the underprivileged rural communities to the ICT world. It should be noted that users are not compelled to be computer savvy to make voice calls, but high voice call costs are the deterrent. Therefore, devising an appropriate Revenue Generation Model would enhance the accessibility and participation of the underprivileged rural communities to the ICT world. As guided by the Design Science Approach, and the Diffusion of Innovations and Social Exchange theories, this research project has discovered and applied five models such as the Freemium, Affiliation, Advertising, Incentives-driven and Subsidy within each development stage of Spoken Web. This research project is of the idea that reimbursing content providers through supporting the proposed Revenue Generation Model as a de facto solution will help in reducing voice call costs to the users of Voice Telephony Applications in future. , Thesis (MCom) -- Faculty of Management and Commerce, 2015
- Full Text:
- Date Issued: 2015-01
- Authors: Mazwi, Sekelo P Lusanda
- Date: 2015-01
- Subjects: Internet telephony , Telecommunication systems
- Language: English
- Type: text
- Identifier: http://hdl.handle.net/10353/25530 , vital:64331
- Description: Amongst various Voice Telephony Applications discovered, IBM India has developed the Spoken Web which enables voice commerce capabilities that are ideally suitable for underprivileged rural communities. Admittedly, these communities are barred from fully utilising ICT enabled electronic commerce services such as the Internet for business marketing processes as a consequence of poor literacy and financial constraints. The advent of Voice Telephony Applications aids accessibility and participation of the underprivileged rural communities to the ICT world. It should be noted that users are not compelled to be computer savvy to make voice calls, but high voice call costs are the deterrent. Therefore, devising an appropriate Revenue Generation Model would enhance the accessibility and participation of the underprivileged rural communities to the ICT world. As guided by the Design Science Approach, and the Diffusion of Innovations and Social Exchange theories, this research project has discovered and applied five models such as the Freemium, Affiliation, Advertising, Incentives-driven and Subsidy within each development stage of Spoken Web. This research project is of the idea that reimbursing content providers through supporting the proposed Revenue Generation Model as a de facto solution will help in reducing voice call costs to the users of Voice Telephony Applications in future. , Thesis (MCom) -- Faculty of Management and Commerce, 2015
- Full Text:
- Date Issued: 2015-01
A review of five international forensic reports : fingerprint evidence lessons for South African lawyers
- Authors: Chiwara, Mercy
- Date: 2018
- Subjects: Fingerprints Fingerprints -- Identification Forensic sciences
- Language: English
- Type: Thesis , Masters , Law
- Identifier: http://hdl.handle.net/10353/10927 , vital:35964
- Description: For more than a century fingerprint evidence has been used as a tool for the forensic identification of offenders, and has generally been accepted without being tested, challenged or scrutinized because the courts were convinced that no prints look alike or are the same. Fingerprint evidence has been used and accepted on the basis that each person’s friction ridges are unique, that the ridges are permanent and can be transferred to a surface. However, the transferability of the uniqueness raises issues that are very significant in relation to the reliability of fingerprint evidence because only a partial impression is typically transferred. Furthermore, the print can be distorted as a result of pressure and this inevitably affects the impression. Nevertheless, in recent and authoritative Reports from the United States and Scotland, criticisms are being raised against fingerprint evidence. These challenges include the fact that to date there has not been a study to validate the reliability of fingerprint individualisation, the fact that there is no specific requirement with regard as to how much constant or uniform detail between latent print and known print suffices to reach a decision of identification and the fact that there are no objective standards coupled with the problem that there is a lack of scientific validity of the method used for comparisons. This study reviews the law relating to fingerprint evidence in the light of the reports produced by the Office of the Inspector General, United States Department of Justice, Reviewing the Mayfield Case (US) in 2006, the National Academy of Sciences (US) Report in 2009, the Fingerprint Inquiry Report by Lord Campbell in Scotland in 2011, the National Institute of Standards and Technology and National Institute of Justice (US) Report in 2012, and the President’s Council of Advisors on Science and Technology Report (US) in 2016, so as to establish lessons for South African lawyers in as far as reliability, weight and admissibility of fingerprint evidence is concerned. Finally, this study concludes that South Africa’s norm of accepting fingerprint evidence as unquestionable is problematic in law and in science and that there is a need for reform regarding the manner in which fingerprint evidence is evaluated by the courts.
- Full Text:
- Date Issued: 2018
- Authors: Chiwara, Mercy
- Date: 2018
- Subjects: Fingerprints Fingerprints -- Identification Forensic sciences
- Language: English
- Type: Thesis , Masters , Law
- Identifier: http://hdl.handle.net/10353/10927 , vital:35964
- Description: For more than a century fingerprint evidence has been used as a tool for the forensic identification of offenders, and has generally been accepted without being tested, challenged or scrutinized because the courts were convinced that no prints look alike or are the same. Fingerprint evidence has been used and accepted on the basis that each person’s friction ridges are unique, that the ridges are permanent and can be transferred to a surface. However, the transferability of the uniqueness raises issues that are very significant in relation to the reliability of fingerprint evidence because only a partial impression is typically transferred. Furthermore, the print can be distorted as a result of pressure and this inevitably affects the impression. Nevertheless, in recent and authoritative Reports from the United States and Scotland, criticisms are being raised against fingerprint evidence. These challenges include the fact that to date there has not been a study to validate the reliability of fingerprint individualisation, the fact that there is no specific requirement with regard as to how much constant or uniform detail between latent print and known print suffices to reach a decision of identification and the fact that there are no objective standards coupled with the problem that there is a lack of scientific validity of the method used for comparisons. This study reviews the law relating to fingerprint evidence in the light of the reports produced by the Office of the Inspector General, United States Department of Justice, Reviewing the Mayfield Case (US) in 2006, the National Academy of Sciences (US) Report in 2009, the Fingerprint Inquiry Report by Lord Campbell in Scotland in 2011, the National Institute of Standards and Technology and National Institute of Justice (US) Report in 2012, and the President’s Council of Advisors on Science and Technology Report (US) in 2016, so as to establish lessons for South African lawyers in as far as reliability, weight and admissibility of fingerprint evidence is concerned. Finally, this study concludes that South Africa’s norm of accepting fingerprint evidence as unquestionable is problematic in law and in science and that there is a need for reform regarding the manner in which fingerprint evidence is evaluated by the courts.
- Full Text:
- Date Issued: 2018
A review of five international forensic reports : fingerprint evidence lessons for South African lawyers
- Authors: Chiwara, Mercy
- Date: 2018
- Subjects: Fingerprints Criminal investigation Forensic sciences
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10353/10918 , vital:35963
- Description: For more than a century fingerprint evidence has been used as a tool for the forensic identification of offenders, and has generally been accepted without being tested, challenged or scrutinized because the courts were convinced that no prints look alike or are the same. Fingerprint evidence has been used and accepted on the basis that each person’s friction ridges are unique, that the ridges are permanent and can be transferred to a surface. However, the transferability of the uniqueness raises issues that are very significant in relation to the reliability of fingerprint evidence because only a partial impression is typically transferred. Furthermore, the print can be distorted as a result of pressure and this inevitably affects the impression. Nevertheless, in recent and authoritative Reports from the United States and Scotland, criticisms are being raised against fingerprint evidence. These challenges include the fact that to date there has not been a study to validate the reliability of fingerprint individualisation, the fact that there is no specific requirement with regard as to how much constant or uniform detail between latent print and known print suffices to reach a decision of identification and the fact that there are no objective standards coupled with the problem that there is a lack of scientific validity of the method used for comparisons. This study reviews the law relating to fingerprint evidence in the light of the reports produced by the Office of the Inspector General, United States Department of Justice, Reviewing the Mayfield Case (US) in 2006, the National Academy of Sciences (US) Report in 2009, the Fingerprint Inquiry Report by Lord Campbell in Scotland in 2011, the National Institute of Standards and Technology and National Institute of Justice (US) Report in 2012, and the President’s Council of Advisors on Science and Technology Report (US) in 2016, so as to establish lessons for South African lawyers in as far as reliability, weight and admissibility of fingerprint evidence is concerned. Finally, this study concludes that South Africa’s norm of accepting fingerprint evidence as unquestionable is problematic in law and in science and that there is a need for reform regarding the manner in which fingerprint evidence is evaluated by the courts.
- Full Text:
- Date Issued: 2018
- Authors: Chiwara, Mercy
- Date: 2018
- Subjects: Fingerprints Criminal investigation Forensic sciences
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10353/10918 , vital:35963
- Description: For more than a century fingerprint evidence has been used as a tool for the forensic identification of offenders, and has generally been accepted without being tested, challenged or scrutinized because the courts were convinced that no prints look alike or are the same. Fingerprint evidence has been used and accepted on the basis that each person’s friction ridges are unique, that the ridges are permanent and can be transferred to a surface. However, the transferability of the uniqueness raises issues that are very significant in relation to the reliability of fingerprint evidence because only a partial impression is typically transferred. Furthermore, the print can be distorted as a result of pressure and this inevitably affects the impression. Nevertheless, in recent and authoritative Reports from the United States and Scotland, criticisms are being raised against fingerprint evidence. These challenges include the fact that to date there has not been a study to validate the reliability of fingerprint individualisation, the fact that there is no specific requirement with regard as to how much constant or uniform detail between latent print and known print suffices to reach a decision of identification and the fact that there are no objective standards coupled with the problem that there is a lack of scientific validity of the method used for comparisons. This study reviews the law relating to fingerprint evidence in the light of the reports produced by the Office of the Inspector General, United States Department of Justice, Reviewing the Mayfield Case (US) in 2006, the National Academy of Sciences (US) Report in 2009, the Fingerprint Inquiry Report by Lord Campbell in Scotland in 2011, the National Institute of Standards and Technology and National Institute of Justice (US) Report in 2012, and the President’s Council of Advisors on Science and Technology Report (US) in 2016, so as to establish lessons for South African lawyers in as far as reliability, weight and admissibility of fingerprint evidence is concerned. Finally, this study concludes that South Africa’s norm of accepting fingerprint evidence as unquestionable is problematic in law and in science and that there is a need for reform regarding the manner in which fingerprint evidence is evaluated by the courts.
- Full Text:
- Date Issued: 2018
A Review of policies for sustainable solid waste management service in Buffalo City Metropolitan Municipality
- Authors: Qhayi-Shweni, Nokuzola
- Date: 2014
- Subjects: Refuse and refuse disposal -- South Africa -- Eastern Cape Sewage disposal -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/3001 , vital:28231
- Description: Waste is not only harmful to the environment alone but it is also a threat to human health and as such its proper management becomes critical. This study which adopted a qualitative approach focused on the review of policies for sustainable solid waste management service in Buffalo City Metropolitan Municipality in an effort to seek what the municipality’s Solid Waste Department should consider in ensuring that all the communities live in a litter free, clean and healthy environment, and ensure that such a service is received by all communities within its jurisdiction. The most sustainable solid waste management strategy would be to adopt the solid waste hierarchy of promoting waste minimisation, re-use, recycling, waste treatment and disposal as the last resort.
- Full Text:
- Date Issued: 2014
- Authors: Qhayi-Shweni, Nokuzola
- Date: 2014
- Subjects: Refuse and refuse disposal -- South Africa -- Eastern Cape Sewage disposal -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/3001 , vital:28231
- Description: Waste is not only harmful to the environment alone but it is also a threat to human health and as such its proper management becomes critical. This study which adopted a qualitative approach focused on the review of policies for sustainable solid waste management service in Buffalo City Metropolitan Municipality in an effort to seek what the municipality’s Solid Waste Department should consider in ensuring that all the communities live in a litter free, clean and healthy environment, and ensure that such a service is received by all communities within its jurisdiction. The most sustainable solid waste management strategy would be to adopt the solid waste hierarchy of promoting waste minimisation, re-use, recycling, waste treatment and disposal as the last resort.
- Full Text:
- Date Issued: 2014
A review of the Lukhanji Local Municipality's recruitment and retention policy
- Authors: Makeleni, Xolani
- Date: 2016
- Subjects: Employees – Recruiting -- South Africa -- Eastern Cape Recruiting and enlistment Employee retention
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/1808 , vital:27561
- Description: The central objective underpinning the rationale of this research is to review the
- Full Text:
- Date Issued: 2016
- Authors: Makeleni, Xolani
- Date: 2016
- Subjects: Employees – Recruiting -- South Africa -- Eastern Cape Recruiting and enlistment Employee retention
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/1808 , vital:27561
- Description: The central objective underpinning the rationale of this research is to review the
- Full Text:
- Date Issued: 2016
A review of the performance management system in municipalities: a case Study of Mnquma Local Municipality
- Yalezo, Yanga https://orcid.org/0000-0003-1663-6559
- Authors: Yalezo, Yanga https://orcid.org/0000-0003-1663-6559
- Date: 2022-05
- Subjects: Performance -- Management , Performance standards , Job evaluation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26885 , vital:66039
- Description: Mnquma Local Municipality is a category B municipality situated in Butterworth in the Eastern Cape with the population of 250 000. Mnquma Local Municipality has a mandate of ensuring that quality services are delivered to its counterparts. Mnquma Local Municipality has a performance management system in place used as a tool to fulfil the mandate. Performance management system is a system that is meant to ensure that the goals and objectives of organisations are achieved. PMS is used worldwide by both the private and public sectors. PMS was first used by the private sector to maximise profits and to minimise poor performance. The public sector also decided to introduce PMS in order to improve the quality-of-service delivery to the public. As such, PMS is a tool that is used to monitor, review, evaluate and assess performance of individual employees. PMS in the public sector especially in the local sphere of government is very important because municipalities are closest to the citizens and are at the core of service delivery. This study sought to investigate how PMS at Mnquma Local Municipality in the Eastern Cape Province was utilised. The study utilised qualitative data collection and analysis techniques. Fourteen respondents were interviewed in order to get a better understanding of PMS at Mnquma Local Municipality. Data was analysed using thematic content analysis. The theoretical framework used in this study is goal-setting theory and control theory of performance management system The key findings of the study were: the respondents regarded PMS as “tool” utilised to carry-out work in the municipality. Respondents believe that somehow all the employees are subjected to PMS one way or another whether knowingly or not. Municipality should offer employees performance bonuses to motivate them to achieve goals and objectives of the municipality. The recommendations are: the municipality should cascade the PMS to the lower-level employee of the municipality. The municipality should offer bonuses to the employees to elevate the performance of individual employees and to ensure that the goals and objects are achieved. , Thesis (MPA) -- Faculty of Management and Commerce, 2022
- Full Text:
- Date Issued: 2022-05
- Authors: Yalezo, Yanga https://orcid.org/0000-0003-1663-6559
- Date: 2022-05
- Subjects: Performance -- Management , Performance standards , Job evaluation
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/26885 , vital:66039
- Description: Mnquma Local Municipality is a category B municipality situated in Butterworth in the Eastern Cape with the population of 250 000. Mnquma Local Municipality has a mandate of ensuring that quality services are delivered to its counterparts. Mnquma Local Municipality has a performance management system in place used as a tool to fulfil the mandate. Performance management system is a system that is meant to ensure that the goals and objectives of organisations are achieved. PMS is used worldwide by both the private and public sectors. PMS was first used by the private sector to maximise profits and to minimise poor performance. The public sector also decided to introduce PMS in order to improve the quality-of-service delivery to the public. As such, PMS is a tool that is used to monitor, review, evaluate and assess performance of individual employees. PMS in the public sector especially in the local sphere of government is very important because municipalities are closest to the citizens and are at the core of service delivery. This study sought to investigate how PMS at Mnquma Local Municipality in the Eastern Cape Province was utilised. The study utilised qualitative data collection and analysis techniques. Fourteen respondents were interviewed in order to get a better understanding of PMS at Mnquma Local Municipality. Data was analysed using thematic content analysis. The theoretical framework used in this study is goal-setting theory and control theory of performance management system The key findings of the study were: the respondents regarded PMS as “tool” utilised to carry-out work in the municipality. Respondents believe that somehow all the employees are subjected to PMS one way or another whether knowingly or not. Municipality should offer employees performance bonuses to motivate them to achieve goals and objectives of the municipality. The recommendations are: the municipality should cascade the PMS to the lower-level employee of the municipality. The municipality should offer bonuses to the employees to elevate the performance of individual employees and to ensure that the goals and objects are achieved. , Thesis (MPA) -- Faculty of Management and Commerce, 2022
- Full Text:
- Date Issued: 2022-05
A review of the water service development plan and service delivery budget and implementation plan (SDBIP) alignment with performance management system in Buffalo City Metropolitan Municipality
- Authors: Sali, Bongani Zandisile
- Date: 2016
- Subjects: Sustainable urban development Environmental management Municipal services
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/12755 , vital:39358
- Description: In South Africa, the Constitution, 1996, the Municipal Structures Act,1998 (Act 117 of 1998), the Municipal Systems Act, 2000 (Act 32 of 2000) and the Municipal Finance Management, 2003 (Act 56 of 2003) place municipalities at the forefront for providing basic services such as waste management, electricity, water, sanitation, roads and transport to the communities. The journey that the local government sphere in South Africa has taken over the last 22 years has not gone smoothly, in some respects it has been a bumpy ride one. A single, unified local government had to be established from the fragmented, undemocratic, unaccountable and racially divided local government system that was inherited. The constitutional and political structure of local government, its promise of democratic accountability, and the delivery of services to improve the lives of citizens has proven to be challenging in their implementation. Performance management was introduced in the local government sphere to improve performance by establishing a rational planning process based on the assumption that “business methods” would be more effective than traditional public administration approaches. There is a problem with municipalities such as the BCMM; the problem is that they operate their WSDP, SDBIP, IDP, budget and PMS in silos. The WSDP, SDBIP, IDP, budget and PMS must be aligned so that BCMM can be able to deliver basic services like water and sanitation. The study sought to review the Water Services Development Plan and Service Budget Implementation Plan Alignment with the Performance Management System in Buffalo City Metropolitan Municipality. Data was collected using interviews from a sample of participants comprising mainly of managers of the BCMM, revealed that most of the performance targets set in the financial years 2009 to 2015 were not achieved. The study came up with the following recommendations that there should be regular workshops, training of BCMM officials in the importance of the alignment of the WSDP and SDBIP with the performance management system in the BCMM. The PMS should contribute in the improvement of productivity, through achieving set targets and goals as planned. The processes must be fully integrated. Challenges facing BCMM in terms of alignment must be addressed. There is also a need for sound annual plans with targets (quarterly) that show how the annual targets will be achieved.
- Full Text:
- Date Issued: 2016
- Authors: Sali, Bongani Zandisile
- Date: 2016
- Subjects: Sustainable urban development Environmental management Municipal services
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/12755 , vital:39358
- Description: In South Africa, the Constitution, 1996, the Municipal Structures Act,1998 (Act 117 of 1998), the Municipal Systems Act, 2000 (Act 32 of 2000) and the Municipal Finance Management, 2003 (Act 56 of 2003) place municipalities at the forefront for providing basic services such as waste management, electricity, water, sanitation, roads and transport to the communities. The journey that the local government sphere in South Africa has taken over the last 22 years has not gone smoothly, in some respects it has been a bumpy ride one. A single, unified local government had to be established from the fragmented, undemocratic, unaccountable and racially divided local government system that was inherited. The constitutional and political structure of local government, its promise of democratic accountability, and the delivery of services to improve the lives of citizens has proven to be challenging in their implementation. Performance management was introduced in the local government sphere to improve performance by establishing a rational planning process based on the assumption that “business methods” would be more effective than traditional public administration approaches. There is a problem with municipalities such as the BCMM; the problem is that they operate their WSDP, SDBIP, IDP, budget and PMS in silos. The WSDP, SDBIP, IDP, budget and PMS must be aligned so that BCMM can be able to deliver basic services like water and sanitation. The study sought to review the Water Services Development Plan and Service Budget Implementation Plan Alignment with the Performance Management System in Buffalo City Metropolitan Municipality. Data was collected using interviews from a sample of participants comprising mainly of managers of the BCMM, revealed that most of the performance targets set in the financial years 2009 to 2015 were not achieved. The study came up with the following recommendations that there should be regular workshops, training of BCMM officials in the importance of the alignment of the WSDP and SDBIP with the performance management system in the BCMM. The PMS should contribute in the improvement of productivity, through achieving set targets and goals as planned. The processes must be fully integrated. Challenges facing BCMM in terms of alignment must be addressed. There is also a need for sound annual plans with targets (quarterly) that show how the annual targets will be achieved.
- Full Text:
- Date Issued: 2016
A review of Tribal Armed Conflict Resolution in selected counties in Lakes State, South Sudan
- Authors: Zakaria, John Lat
- Date: 2013
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11712 , http://hdl.handle.net/10353/d1015247
- Description: This mini-dissertation, aims to review tribal armed conflict resolution in selected Counties in Lakes State, South Sudan. The objectives of the study were to find out the consequences of the tribal armed conflicts on governance and service delivery and strategies to mitigate peace and tribal armed conflict resolution in order to enable development in the selected counties of Lakes state. Quantitative and qualitative data was collected from a sample of three hundred and ten (310) respondents who included the County Commissioners, Judges and Magistrates, Law enforcement officers, local government officers and traditional leaders through questionnaires and interviews. The study sought to review the effects of tribal armed conflicts on service delivery in the selected communities. It further examined conflict resolutions mechanisms and strategies that have been used by various actors and stakeholder to ameliorate tribal armed conflict in Lakes State, South Sudan. The results of the study showed that ethnicity in conflicts in South Sudan has played a significant role and has posed many challenges to scholars, political leaders, appointed public officials and communities alike. Some of the challenges include; tribalism, ethnic conflicts, and struggle over scarce resources. This has often led to rampant underdevelopment, under-representation in governance; unemployment and poverty, among administrative perils and dysfunctions that have subsequently been major drivers of tribal armed conflicts. Many youth who are unemployed are often involved in cattle raiding, hence revenge attacks often lead to frequent tribal armed conflicts. The study recommends that effective and sustainable peace building can be achieved through empowerment of the communities and use of traditional strategies in tribal armed conflict resolution in Lakes State. This is because external players often attempt to engage in peace building activities without seeking sustainable solutions at the grassroots level. Very often conflict resolution has been the preserve of NGOs and diplomats, who have no intimate acquaintance with local contexts. The study suggests that provision of services to the people through sustainable development of the rural areas and through the creation of alternative forms of livelihood, such as jobs, has to engage with and include the youth in economic development, so that tribal armed conflicts are ameliorated.
- Full Text:
- Date Issued: 2013
- Authors: Zakaria, John Lat
- Date: 2013
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11712 , http://hdl.handle.net/10353/d1015247
- Description: This mini-dissertation, aims to review tribal armed conflict resolution in selected Counties in Lakes State, South Sudan. The objectives of the study were to find out the consequences of the tribal armed conflicts on governance and service delivery and strategies to mitigate peace and tribal armed conflict resolution in order to enable development in the selected counties of Lakes state. Quantitative and qualitative data was collected from a sample of three hundred and ten (310) respondents who included the County Commissioners, Judges and Magistrates, Law enforcement officers, local government officers and traditional leaders through questionnaires and interviews. The study sought to review the effects of tribal armed conflicts on service delivery in the selected communities. It further examined conflict resolutions mechanisms and strategies that have been used by various actors and stakeholder to ameliorate tribal armed conflict in Lakes State, South Sudan. The results of the study showed that ethnicity in conflicts in South Sudan has played a significant role and has posed many challenges to scholars, political leaders, appointed public officials and communities alike. Some of the challenges include; tribalism, ethnic conflicts, and struggle over scarce resources. This has often led to rampant underdevelopment, under-representation in governance; unemployment and poverty, among administrative perils and dysfunctions that have subsequently been major drivers of tribal armed conflicts. Many youth who are unemployed are often involved in cattle raiding, hence revenge attacks often lead to frequent tribal armed conflicts. The study recommends that effective and sustainable peace building can be achieved through empowerment of the communities and use of traditional strategies in tribal armed conflict resolution in Lakes State. This is because external players often attempt to engage in peace building activities without seeking sustainable solutions at the grassroots level. Very often conflict resolution has been the preserve of NGOs and diplomats, who have no intimate acquaintance with local contexts. The study suggests that provision of services to the people through sustainable development of the rural areas and through the creation of alternative forms of livelihood, such as jobs, has to engage with and include the youth in economic development, so that tribal armed conflicts are ameliorated.
- Full Text:
- Date Issued: 2013
A simulation study of the behaviour of the logrank test under different levels of stratification and sample sizes
- Authors: Jubane, Ido
- Date: 2013
- Subjects: Statistics , Survival analysis (Biometry)
- Language: English
- Type: Thesis , Masters , MSc (Biostatistics and Epidemiology)
- Identifier: vital:11784 , http://hdl.handle.net/10353/d1018558 , http://hdl.handle.net/10353/d1018559 , Statistics , Survival analysis (Biometry)
- Description: In clinical trials, patients are enrolled into two treatment arms. A researcher may be interested in studying the effectiveness of a new drug or the comparison of two drugs for the treatment of a disease. This survival data is later analysed using the logrank test or the Cox regression model to detect differences in survivor functions. However, the power function of the logrank test depends solely on the number of patients enrolled into the study. Because statisticians will always minimise type I and type II errors, a researcher carrying out a clinical trial must define beforehand, the number of patients to be enrolled into the clinical study. Without proper sample size and power estimation a clinical trial may fail to detect a false hypothesis of the equality of survivor functions. This study presents through simulation, a way of power and sample size estimation for clinical trials that use the logrank test for their data analysis and suggests an easy method to estimate power and sample size in such clinical studies. Findings on power analysis and sample size estimation on logrank test are applied to two real examples: one is the Veterans' Administration Lung Cancer study; and the other is the data from a placebo controlled trial of gamma interferon in chronic granulotomous disease.
- Full Text:
- Date Issued: 2013
- Authors: Jubane, Ido
- Date: 2013
- Subjects: Statistics , Survival analysis (Biometry)
- Language: English
- Type: Thesis , Masters , MSc (Biostatistics and Epidemiology)
- Identifier: vital:11784 , http://hdl.handle.net/10353/d1018558 , http://hdl.handle.net/10353/d1018559 , Statistics , Survival analysis (Biometry)
- Description: In clinical trials, patients are enrolled into two treatment arms. A researcher may be interested in studying the effectiveness of a new drug or the comparison of two drugs for the treatment of a disease. This survival data is later analysed using the logrank test or the Cox regression model to detect differences in survivor functions. However, the power function of the logrank test depends solely on the number of patients enrolled into the study. Because statisticians will always minimise type I and type II errors, a researcher carrying out a clinical trial must define beforehand, the number of patients to be enrolled into the clinical study. Without proper sample size and power estimation a clinical trial may fail to detect a false hypothesis of the equality of survivor functions. This study presents through simulation, a way of power and sample size estimation for clinical trials that use the logrank test for their data analysis and suggests an easy method to estimate power and sample size in such clinical studies. Findings on power analysis and sample size estimation on logrank test are applied to two real examples: one is the Veterans' Administration Lung Cancer study; and the other is the data from a placebo controlled trial of gamma interferon in chronic granulotomous disease.
- Full Text:
- Date Issued: 2013