NetwIOC: a framework for the automated generation of network-based IOCS for malware information sharing and defence
- Authors: Rudman, Lauren Lynne
- Date: 2018
- Subjects: Malware (Computer software) , Computer networks Security measures , Computer security , Python (Computer program language)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/60639 , vital:27809
- Description: With the substantial number of new malware variants found each day, it is useful to have an efficient way to retrieve Indicators of Compromise (IOCs) from the malware in a format suitable for sharing and detection. In the past, these indicators were manually created after inspection of binary samples and network traffic. The Cuckoo Sandbox, is an existing dynamic malware analysis system which meets the requirements for the proposed framework and was extended by adding a few custom modules. This research explored a way to automate the generation of detailed network-based IOCs in a popular format which can be used for sharing. This was done through careful filtering and analysis of the PCAP hie generated by the sandbox, and placing these values into the correct type of STIX objects using Python, Through several evaluations, analysis of what type of network traffic can be expected for the creation of IOCs was conducted, including a brief ease study that examined the effect of analysis time on the number of IOCs created. Using the automatically generated IOCs to create defence and detection mechanisms for the network was evaluated and proved successful, A proof of concept sharing platform developed for the STIX IOCs is showcased at the end of the research.
- Full Text:
- Date Issued: 2018
- Authors: Rudman, Lauren Lynne
- Date: 2018
- Subjects: Malware (Computer software) , Computer networks Security measures , Computer security , Python (Computer program language)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/60639 , vital:27809
- Description: With the substantial number of new malware variants found each day, it is useful to have an efficient way to retrieve Indicators of Compromise (IOCs) from the malware in a format suitable for sharing and detection. In the past, these indicators were manually created after inspection of binary samples and network traffic. The Cuckoo Sandbox, is an existing dynamic malware analysis system which meets the requirements for the proposed framework and was extended by adding a few custom modules. This research explored a way to automate the generation of detailed network-based IOCs in a popular format which can be used for sharing. This was done through careful filtering and analysis of the PCAP hie generated by the sandbox, and placing these values into the correct type of STIX objects using Python, Through several evaluations, analysis of what type of network traffic can be expected for the creation of IOCs was conducted, including a brief ease study that examined the effect of analysis time on the number of IOCs created. Using the automatically generated IOCs to create defence and detection mechanisms for the network was evaluated and proved successful, A proof of concept sharing platform developed for the STIX IOCs is showcased at the end of the research.
- Full Text:
- Date Issued: 2018
Non-government organizations’ adoption of knowledge management systems to enhance service delivery of projects in Grahamstown in the Makana region of the Eastern Cape Province, South Africa
- Authors: Sherif, Nabiha Mohammed
- Date: 2018
- Subjects: Knowledge management , Organizational learning , Non-governmental organizations South Africa Makhanda , Human services South Africa Makhanda
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/61723 , vital:28052
- Description: The object of this research is to enhance the performance of non-government organizations in the Makana region of the Eastern Cape Province of South Africa by the use of knowledge management practices and principles. Non-government organizations face several service delivery challenges that affect their performance. Knowledge management assists in enhancing performance by means of organizational learning. However, the adoption of knowledge management systems has been limited to the profit-making sector. This study includes an evaluation of the contributing factors influencing the adoption of knowledge management and the extent to which non-government organizations use knowledge management to promote organizational learning. An interpretivist, qualitative case study approach was used on five non-government organizations cases from the Makana region of the Eastern Cape Province of South Africa. A suitability profile sampling method was developed to select the non-government organization cases. The participants in the research include non-government organizations’ managers, employees and volunteers. Literature was explored to gain a better understanding of the research area. The research was initiated by an open-ended questionnaire to gather data from the participants, followed by a focus group to enrich the interpretation of the findings. The research proposes a framework to facilitate the adoption of knowledge management systems in non-government organizations. The findings of the research are intended to enhance the performance of non-government organizations projects by means of the use of knowledge management systems.
- Full Text:
- Date Issued: 2018
- Authors: Sherif, Nabiha Mohammed
- Date: 2018
- Subjects: Knowledge management , Organizational learning , Non-governmental organizations South Africa Makhanda , Human services South Africa Makhanda
- Language: English
- Type: text , Thesis , Masters , MCom
- Identifier: http://hdl.handle.net/10962/61723 , vital:28052
- Description: The object of this research is to enhance the performance of non-government organizations in the Makana region of the Eastern Cape Province of South Africa by the use of knowledge management practices and principles. Non-government organizations face several service delivery challenges that affect their performance. Knowledge management assists in enhancing performance by means of organizational learning. However, the adoption of knowledge management systems has been limited to the profit-making sector. This study includes an evaluation of the contributing factors influencing the adoption of knowledge management and the extent to which non-government organizations use knowledge management to promote organizational learning. An interpretivist, qualitative case study approach was used on five non-government organizations cases from the Makana region of the Eastern Cape Province of South Africa. A suitability profile sampling method was developed to select the non-government organization cases. The participants in the research include non-government organizations’ managers, employees and volunteers. Literature was explored to gain a better understanding of the research area. The research was initiated by an open-ended questionnaire to gather data from the participants, followed by a focus group to enrich the interpretation of the findings. The research proposes a framework to facilitate the adoption of knowledge management systems in non-government organizations. The findings of the research are intended to enhance the performance of non-government organizations projects by means of the use of knowledge management systems.
- Full Text:
- Date Issued: 2018
Occurrence of mugilid and sparid fishes in Zostera capensis and bare sediment habitats of the Knysna Estuary
- Authors: Pollard, Melissa
- Date: 2018
- Subjects: Gray mullets South Africa Knysna Lagoon , Sparidae South Africa Knysna Lagoon , Seagrasses South Africa Knysna Lagoon , Eelgrass South Africa Knysna Lagoon , Gray mullets Habitat South Africa Knysna Lagoon , Sparidae Habitat South Africa Knysna Lagoon , Underwater videography in wildlife monitoring , Seining , Zostera capensis Setchel
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/54979 , vital:26641
- Description: Seagrass meadows are regarded as one of the most unique and valuable ecosystems in the biosphere, primarily because of the variety of services that they provide. Seagrass meadows serve as nursery grounds for many species and often play an important role in the juvenile stages of economically and recreationally important fish. Zostera capensis Setchell is one of the most dominant submerged macrophytes and the most common seagrass in South African estuaries and is often referred to as eelgrass. Zostera capensis meadows occupy a large area within the Knysna Estuary but little is known about their importance to associated fish assemblages. With Z. capensis meadows being under increased pressure from anthropogenic influences, it is important to establish which fish species and families utilize these habitats and what role they play in the ecology of fish assemblages within the Knysna Estuary. The primary objective of this study was to compare the use of Z. capensis and adjacent bare sediment areas by mainly large juvenile and subadult sparids and mugilids using different techniques. The two main hypotheses were as follows; 1) Mugilidae are likely to be more dominant in the unvegetated areas of the estuary littoral and Sparidae are likely to predominate within the Z. capensis bed areas of the estuary littoral. 2) The non-destructive underwater video monitoring method would yield similar fish composition data to seine netting sampling of the identical sites. Both hypotheses were assessed using data collected during this study and the analysis of historical unpublished data. Overall, Mugilidae were more abundant at bare unvegetated areas where they did most of their foraging. Sparidae were more abundant in the Z. capensis beds, which was also the habitat where they primarily foraged. With regards to the comparison of two different sampling methods, namely underwater video monitoring and seine netting, similar patterns arose with regards to the fish species observed in camera footage and those captured in the seine net, although the abundances were not always comparable.
- Full Text:
- Date Issued: 2018
- Authors: Pollard, Melissa
- Date: 2018
- Subjects: Gray mullets South Africa Knysna Lagoon , Sparidae South Africa Knysna Lagoon , Seagrasses South Africa Knysna Lagoon , Eelgrass South Africa Knysna Lagoon , Gray mullets Habitat South Africa Knysna Lagoon , Sparidae Habitat South Africa Knysna Lagoon , Underwater videography in wildlife monitoring , Seining , Zostera capensis Setchel
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/54979 , vital:26641
- Description: Seagrass meadows are regarded as one of the most unique and valuable ecosystems in the biosphere, primarily because of the variety of services that they provide. Seagrass meadows serve as nursery grounds for many species and often play an important role in the juvenile stages of economically and recreationally important fish. Zostera capensis Setchell is one of the most dominant submerged macrophytes and the most common seagrass in South African estuaries and is often referred to as eelgrass. Zostera capensis meadows occupy a large area within the Knysna Estuary but little is known about their importance to associated fish assemblages. With Z. capensis meadows being under increased pressure from anthropogenic influences, it is important to establish which fish species and families utilize these habitats and what role they play in the ecology of fish assemblages within the Knysna Estuary. The primary objective of this study was to compare the use of Z. capensis and adjacent bare sediment areas by mainly large juvenile and subadult sparids and mugilids using different techniques. The two main hypotheses were as follows; 1) Mugilidae are likely to be more dominant in the unvegetated areas of the estuary littoral and Sparidae are likely to predominate within the Z. capensis bed areas of the estuary littoral. 2) The non-destructive underwater video monitoring method would yield similar fish composition data to seine netting sampling of the identical sites. Both hypotheses were assessed using data collected during this study and the analysis of historical unpublished data. Overall, Mugilidae were more abundant at bare unvegetated areas where they did most of their foraging. Sparidae were more abundant in the Z. capensis beds, which was also the habitat where they primarily foraged. With regards to the comparison of two different sampling methods, namely underwater video monitoring and seine netting, similar patterns arose with regards to the fish species observed in camera footage and those captured in the seine net, although the abundances were not always comparable.
- Full Text:
- Date Issued: 2018
On becoming literate in English: a literate life history study of selected Grade 12 learners in a Namibian secondary school
- Authors: Kangootui, Angela Lydia
- Date: 2018
- Subjects: English language -- Study and teaching (Secondary) -- Namibia -- Omaheke , Second language acquisition -- Omaheke , Language and languages -- Study and teaching -- Namibia -- Omaheke , Namibia. Ministry of Basic Education, Sport, and Culture
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/62252 , vital:28147
- Description: This study sought to investigate English literate journeys of selected Grade 12 learners who come from educationally disempowering home backgrounds, and who ‘meet’ informal and/or formal exposure to English language mainly within the confines of school hours. Located within the qualitative, interpretive life history study design, the study used questionnaire and learners’ autobiographies to generate data. These data were then subjected to explore the literate journey of these learners in English as a second language through a comprehensive descriptive analysis. The study was conducted in an urban high school in Omaheke region, Namibia, and the research site and study participants were selected purposively. Theoretically, the study drew from Krashen’s (1981) Second Language Acquisition Theory, which offered this study the five hypotheses that were used as categories to generate, analyse, interpret and discuss data. Research findings reveal that, for various reasons discussed in the study, there is minimal parental involvement in the English literacy journey of their children at home. These include parents not reading regularly to their children, not encouraging visits to the library and the shortage of literacy materials such as newspapers and magazines. The educational level of parents is also a major contributing factor in the literacy journey of their children. The contribution of the community towards the literacy journey in English as a second language of these learners was minimal since the vernacular languages or Afrikaans were used to communicate. At the school level it was found that the attitude of some teachers was a hindrance, as was the way they taught. The use of the mother tongue during teaching also had an effect on the literacy development of the learners. Although the different methods used by various teachers at school level contributed in a way towards literacy development of the learners at school, the huge number of learners in the classrooms was a force to be reckoned with. It is hoped that the study’s findings will assist the Ministry of Basic Education Arts and Culture (MBEAC) in Namibia in informing the type of syllabus content and pedagogical practices to be utilised in teaching English as a Second Language.
- Full Text:
- Date Issued: 2018
- Authors: Kangootui, Angela Lydia
- Date: 2018
- Subjects: English language -- Study and teaching (Secondary) -- Namibia -- Omaheke , Second language acquisition -- Omaheke , Language and languages -- Study and teaching -- Namibia -- Omaheke , Namibia. Ministry of Basic Education, Sport, and Culture
- Language: English
- Type: text , Thesis , Masters , MEd
- Identifier: http://hdl.handle.net/10962/62252 , vital:28147
- Description: This study sought to investigate English literate journeys of selected Grade 12 learners who come from educationally disempowering home backgrounds, and who ‘meet’ informal and/or formal exposure to English language mainly within the confines of school hours. Located within the qualitative, interpretive life history study design, the study used questionnaire and learners’ autobiographies to generate data. These data were then subjected to explore the literate journey of these learners in English as a second language through a comprehensive descriptive analysis. The study was conducted in an urban high school in Omaheke region, Namibia, and the research site and study participants were selected purposively. Theoretically, the study drew from Krashen’s (1981) Second Language Acquisition Theory, which offered this study the five hypotheses that were used as categories to generate, analyse, interpret and discuss data. Research findings reveal that, for various reasons discussed in the study, there is minimal parental involvement in the English literacy journey of their children at home. These include parents not reading regularly to their children, not encouraging visits to the library and the shortage of literacy materials such as newspapers and magazines. The educational level of parents is also a major contributing factor in the literacy journey of their children. The contribution of the community towards the literacy journey in English as a second language of these learners was minimal since the vernacular languages or Afrikaans were used to communicate. At the school level it was found that the attitude of some teachers was a hindrance, as was the way they taught. The use of the mother tongue during teaching also had an effect on the literacy development of the learners. Although the different methods used by various teachers at school level contributed in a way towards literacy development of the learners at school, the huge number of learners in the classrooms was a force to be reckoned with. It is hoped that the study’s findings will assist the Ministry of Basic Education Arts and Culture (MBEAC) in Namibia in informing the type of syllabus content and pedagogical practices to be utilised in teaching English as a Second Language.
- Full Text:
- Date Issued: 2018
On high-altitude and high- latitude frost environments
- Authors: Hansen, Christel Dorothee
- Date: 2018
- Subjects: Frost -- Drakensberg Mountains , Frost -- Prince Edward Islands -- Marion Island , Frost -- Antarctica -- Queen Maud Land , Climatic geomorphology -- Southern Hemisphere , Permafrost -- Southern Hemisphere , Periglacial processes -- Southern Hemisphere , Frost environments -- Southern Hemisphere
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62383 , vital:28169
- Description: Frost environments occur throughout the world, with associated processes occurring across climatic zones. Climatic geomorphology proposes that climatic zones, largely derived from annual average air temperature and precipitation values, have specific landforms and processes active within that zone. This study offers unique insights into the frost environments of three locations in the Southern Hemisphere, namely the Eastern Cape Drakensberg of South Africa, sub-Antarctic Marion Island, and Dronning Maud Land of Antarctica. The Drakensberg ranges from temperate to alpine, Marion Island is hyper-maritime, and Dronning Maud Land a polar desert. Drivers and forcings on the ground frost regime are identified, as are future climatic scenarios. Altitude and latitude were identified as the most important locational drivers, while air temperature showed highest correlation with freezing events. The initiation of a freeze event correlated strongly with maximum ground temperatures. Vegetation cover was found to ameliorate frost cycles, thereby increasing ground temperatures. Dronning Maud Land of Antarctica is characterised by annual frost (permafrost), with limited seasonal thaw in summer. Thawing cycles reflected the depth of the active layer, which ranged from just under 60 cm for Robertskollen (at lowest altitude) to less than 15 cm on Slettfjell (at greatest altitude). Marion Island had the most active frost environment, exhibiting both seasonal frost, and ubiquitous shallow diurnal frost cycles. The Drakensberg were largely frost-free, with limited seasonal frost and few diurnal freeze- thaw events. Diurnal frost processes were found to be azonal, and present at all three study locations. Evidence of landforms derived from diurnal frost processes were evident in each zone. Equifinality/convergence of form was present to a degree. The presence of patterned ground, which was not wholly derived from frost processes, suggests a measure of equifinality. Furthermore, openwork block deposits, of which not all are either blockstreams nor blockfields, are not necessarily the result of frost processes. The periglacial environment is poorly defined and methods to delineate this environment, as well as other climatic zones, should include additional parameters. Delineating zones on annual (and limited) monthly averages based on predominantly temperature, is not sufficient. While concepts of climatic geomorphology may be applied in a general sense, this framework is not suited to working at smaller scales. Specifically, periglacial environments should be delineated using ground moisture, as well as air temperature. Furthermore, vegetation and snow cover are important, as are soil textural properties.
- Full Text:
- Date Issued: 2018
- Authors: Hansen, Christel Dorothee
- Date: 2018
- Subjects: Frost -- Drakensberg Mountains , Frost -- Prince Edward Islands -- Marion Island , Frost -- Antarctica -- Queen Maud Land , Climatic geomorphology -- Southern Hemisphere , Permafrost -- Southern Hemisphere , Periglacial processes -- Southern Hemisphere , Frost environments -- Southern Hemisphere
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/62383 , vital:28169
- Description: Frost environments occur throughout the world, with associated processes occurring across climatic zones. Climatic geomorphology proposes that climatic zones, largely derived from annual average air temperature and precipitation values, have specific landforms and processes active within that zone. This study offers unique insights into the frost environments of three locations in the Southern Hemisphere, namely the Eastern Cape Drakensberg of South Africa, sub-Antarctic Marion Island, and Dronning Maud Land of Antarctica. The Drakensberg ranges from temperate to alpine, Marion Island is hyper-maritime, and Dronning Maud Land a polar desert. Drivers and forcings on the ground frost regime are identified, as are future climatic scenarios. Altitude and latitude were identified as the most important locational drivers, while air temperature showed highest correlation with freezing events. The initiation of a freeze event correlated strongly with maximum ground temperatures. Vegetation cover was found to ameliorate frost cycles, thereby increasing ground temperatures. Dronning Maud Land of Antarctica is characterised by annual frost (permafrost), with limited seasonal thaw in summer. Thawing cycles reflected the depth of the active layer, which ranged from just under 60 cm for Robertskollen (at lowest altitude) to less than 15 cm on Slettfjell (at greatest altitude). Marion Island had the most active frost environment, exhibiting both seasonal frost, and ubiquitous shallow diurnal frost cycles. The Drakensberg were largely frost-free, with limited seasonal frost and few diurnal freeze- thaw events. Diurnal frost processes were found to be azonal, and present at all three study locations. Evidence of landforms derived from diurnal frost processes were evident in each zone. Equifinality/convergence of form was present to a degree. The presence of patterned ground, which was not wholly derived from frost processes, suggests a measure of equifinality. Furthermore, openwork block deposits, of which not all are either blockstreams nor blockfields, are not necessarily the result of frost processes. The periglacial environment is poorly defined and methods to delineate this environment, as well as other climatic zones, should include additional parameters. Delineating zones on annual (and limited) monthly averages based on predominantly temperature, is not sufficient. While concepts of climatic geomorphology may be applied in a general sense, this framework is not suited to working at smaller scales. Specifically, periglacial environments should be delineated using ground moisture, as well as air temperature. Furthermore, vegetation and snow cover are important, as are soil textural properties.
- Full Text:
- Date Issued: 2018
Online Appendix: The Best and Worst Times of Life for South Africans: Evidence of universal reference standards in evaluations of personal well-being using Bernheim’s ACSA
- Moller, Valerie, Roberts, Benjamin J
- Authors: Moller, Valerie , Roberts, Benjamin J
- Date: 2018
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10962/67024 , vital:29021
- Description: Online appendix to the authors’ paper published in Social Indicators Research under the title: ‘The Best and Worst Times of Life for South Africans: Evidence of universal reference standards in evaluations of personal well‐being using Bernheim’s ACSA’. From the introduction: The Anamnestic Comparative Self‐Assessment (Bernheim’s ACSA), a measure of personal well‐being, was applied in the 10th annual round of the nationally representative South African Social Attitudes Survey (SASAS), a research infrastructure that has been administered by the Human Sciences Research Council (HSRC) since 2003. The target population for the survey was individuals aged 16 and over who live in South Africa. The multi‐stage sampling frame used by SASAS is based on census enumerator areas and data is weighted to the South African population using Statistics South Africa’s mid‐year population estimates as a benchmark. A total of 2’521 persons were interviewed in October and November 2012 by trained fieldworkers in their homes. Each interview was conducted in the respondent’s home language. ACSA was translated into the eleven official national languages. The SASAS 2012 study of ACSA follows on two earlier South African studies conducted in the Eastern Cape Province: a small pilot study conducted in 2005/6, followed by a larger representative community survey with some 1’000 respondents in 2007. ACSA uses a self‐anchoring scale. SASAS 2012 survey respondents were asked to think, first of their best period in life, and then of their worst period in life. These two periods represent the anchors of an 11‐ point scale running from ‐5 over a mid‐point (0), to +5. Text placed above the negative ‐5 anchor of the scale read: ‘As bad as the WORST period in my life’; text above the positive +5 anchor read: ‘As good as the BEST period in my life’. The respondents were asked to rate their present well‐being relative to these two periods on the scale. Their descriptions of these two extreme periods were recorded verbatim at the time of the interview. Later they were classified by domain in life based on the guidelines for the standard multiple‐choice format provided for recording ACSA anchors. This classification system is recommended by the ACSA scales’ initiator, Jan Bernheim and his colleagues. This online appendix to our Social Indicators Research article (‘The best and worst times of life for South Africans: Evidence of universal reference standards in evaluations of personal well‐being using Bernheim’s ACSA’) reports in greater detail the substantive contents of the survey responses to the ACSA anchoring process. The anchors of the ACSA scale serve as the reference standards for evaluating one’s life. Importantly, our 2012 SASAS survey respondents were invited to make explicit their choice of reference standards when reviewing their lives. This data offers a unique opportunity to gain rich insights into what matters for South Africans when they think about their quality of life and personal well‐being.
- Full Text:
- Date Issued: 2018
- Authors: Moller, Valerie , Roberts, Benjamin J
- Date: 2018
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10962/67024 , vital:29021
- Description: Online appendix to the authors’ paper published in Social Indicators Research under the title: ‘The Best and Worst Times of Life for South Africans: Evidence of universal reference standards in evaluations of personal well‐being using Bernheim’s ACSA’. From the introduction: The Anamnestic Comparative Self‐Assessment (Bernheim’s ACSA), a measure of personal well‐being, was applied in the 10th annual round of the nationally representative South African Social Attitudes Survey (SASAS), a research infrastructure that has been administered by the Human Sciences Research Council (HSRC) since 2003. The target population for the survey was individuals aged 16 and over who live in South Africa. The multi‐stage sampling frame used by SASAS is based on census enumerator areas and data is weighted to the South African population using Statistics South Africa’s mid‐year population estimates as a benchmark. A total of 2’521 persons were interviewed in October and November 2012 by trained fieldworkers in their homes. Each interview was conducted in the respondent’s home language. ACSA was translated into the eleven official national languages. The SASAS 2012 study of ACSA follows on two earlier South African studies conducted in the Eastern Cape Province: a small pilot study conducted in 2005/6, followed by a larger representative community survey with some 1’000 respondents in 2007. ACSA uses a self‐anchoring scale. SASAS 2012 survey respondents were asked to think, first of their best period in life, and then of their worst period in life. These two periods represent the anchors of an 11‐ point scale running from ‐5 over a mid‐point (0), to +5. Text placed above the negative ‐5 anchor of the scale read: ‘As bad as the WORST period in my life’; text above the positive +5 anchor read: ‘As good as the BEST period in my life’. The respondents were asked to rate their present well‐being relative to these two periods on the scale. Their descriptions of these two extreme periods were recorded verbatim at the time of the interview. Later they were classified by domain in life based on the guidelines for the standard multiple‐choice format provided for recording ACSA anchors. This classification system is recommended by the ACSA scales’ initiator, Jan Bernheim and his colleagues. This online appendix to our Social Indicators Research article (‘The best and worst times of life for South Africans: Evidence of universal reference standards in evaluations of personal well‐being using Bernheim’s ACSA’) reports in greater detail the substantive contents of the survey responses to the ACSA anchoring process. The anchors of the ACSA scale serve as the reference standards for evaluating one’s life. Importantly, our 2012 SASAS survey respondents were invited to make explicit their choice of reference standards when reviewing their lives. This data offers a unique opportunity to gain rich insights into what matters for South Africans when they think about their quality of life and personal well‐being.
- Full Text:
- Date Issued: 2018
Participation in the anti-sexual violence silent protest: a sexual citizenship perspective
- Authors: Chitiki, Elizabeth
- Date: 2018
- Subjects: Sex crimes Campus violence -- South Africa -- Prevention Rape victims -- Services for -- Political aspects -- South Africa Anti-rape movement Rape -- Case studies Sexual orientation
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/62917 , vital:28310
- Description: There is a growing body of research on sexual citizenship that focuses attention on gender and which bridges the gap between public and private life in order to rethink citizenship from a feminist perspective. This is in contrast to understandings of citizenship that promote policies of sexual regulation and a heteronormative ideal of citizenship. My research takes the form of a qualitative case study. Using data from two focus group discussions, fifteen personal diaries, as well as social media posts, I analyse participation in the Silent Protest, an annual anti-rape protest, through the lens of sexual citizenship. I look at how participation in the protest promotes or inhibits inclusive and process-based understandings of sexual violence and sexualities issues. Data were analysed using thematic analysis and the results of the analysis are presented into two parts. The first part of the analysis discusses the politics of affect and witnessing as two processes through which allies’ understandings of sexual violence are shaped. The second part of analysis shows that the Silent Protest contributes to people’s knowledge and understandings of sexual violence in relation to sexualities in a range of ways. Examples of inclusive understandings are: (1) insights about rape in relation to gender and heteronormative inequalities, culture and patriarchal dominance; (2) understanding of critical sexual citizenship in relation to sexual violence; and (3) understanding of politics of recognition (the need for recognition of the importance of safe spaces for formal and informal support for victim-survivors and recognition of victim-survivors’ identities). However, some of the understandings are limited to emotion and affect dynamics. In some ways, therefore, the Silent Protest fails to promote understandings significant to inclusive citizenship, including understandings of entitlements to non-discriminatory sexual health care services and legal services.
- Full Text:
- Date Issued: 2018
- Authors: Chitiki, Elizabeth
- Date: 2018
- Subjects: Sex crimes Campus violence -- South Africa -- Prevention Rape victims -- Services for -- Political aspects -- South Africa Anti-rape movement Rape -- Case studies Sexual orientation
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/62917 , vital:28310
- Description: There is a growing body of research on sexual citizenship that focuses attention on gender and which bridges the gap between public and private life in order to rethink citizenship from a feminist perspective. This is in contrast to understandings of citizenship that promote policies of sexual regulation and a heteronormative ideal of citizenship. My research takes the form of a qualitative case study. Using data from two focus group discussions, fifteen personal diaries, as well as social media posts, I analyse participation in the Silent Protest, an annual anti-rape protest, through the lens of sexual citizenship. I look at how participation in the protest promotes or inhibits inclusive and process-based understandings of sexual violence and sexualities issues. Data were analysed using thematic analysis and the results of the analysis are presented into two parts. The first part of the analysis discusses the politics of affect and witnessing as two processes through which allies’ understandings of sexual violence are shaped. The second part of analysis shows that the Silent Protest contributes to people’s knowledge and understandings of sexual violence in relation to sexualities in a range of ways. Examples of inclusive understandings are: (1) insights about rape in relation to gender and heteronormative inequalities, culture and patriarchal dominance; (2) understanding of critical sexual citizenship in relation to sexual violence; and (3) understanding of politics of recognition (the need for recognition of the importance of safe spaces for formal and informal support for victim-survivors and recognition of victim-survivors’ identities). However, some of the understandings are limited to emotion and affect dynamics. In some ways, therefore, the Silent Protest fails to promote understandings significant to inclusive citizenship, including understandings of entitlements to non-discriminatory sexual health care services and legal services.
- Full Text:
- Date Issued: 2018
Perceptions of Ulwaluko in a Liberal Democratic State: is multiculturalism beneficial to AmaXhosa women in the Eastern Cape province of South Africa?
- Authors: Gogela, Kholisa B
- Date: 2018
- Subjects: Initiation rites -- South Africa -- Eastern Cape , Circumcision -- South Africa -- Eastern Cape , Stigma (Social psychology) -- South Africa -- Eastern Cape , Xhosa (African people) -- South Africa -- Eastern Cape , Women -- Attitudes , Multiculturalism -- South Africa -- Eastern Cape , Women's rights -- South Africa -- Eastern Cape , Male domination (Social structure) -- South Africa -- Eastern Cape , Sex discrimination against women -- South Africa -- Eastern Cape , Ulwaluko
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61780 , vital:28059
- Description: This exploratory qualitative study sought to investigate the views and perceptions of women on their experiences of ulwaluko, a traditional rite practised by amaXhosa in the Eastern Cape province of South Africa. Ulwaluko is also known as isiko lokwaluka or ukoluka in isiXhosa. The concept refers not only to the act of circumcision that occurs during the initiation ritual but the entire process a boy goes through in observing this practice. Ulwaluko is performed in the belief that it will transform boys into accountable and responsible citizens of the society who are fully committed and dedicated to the tenets and standards of nation building. All amaXhosa boys are expected to undergo this tradition to be considered men. Failure to go to the initiation school usually results in social stigma and complete banishment by the society. There is an abundance of literature on studies that have been conducted on male circumcision (and not ulwaluko) which is performed for hygiene and religious purposes worldwide. With regards to ulwaluko of amaXhosa, research studies that have been conducted appear to lean mainly towards biomedical and public health aspects of the ritual. There seems to be an even bigger proportion of studies whose objective was to examine the relationship between circumcision and HIV/AIDS. From the literature review, it was not difficult to observe the pervasive paucity of research studies on women in relation to initiation (and that of amaXhosa in particular), with regards to their inclusion or exclusion in the practice, their feelings, perceptions, experiences and attitudes towards the custom. It is for this reason that I found it crucial to conduct this study. The main research question I sought to answer in this investigation was: are the human rights and gender equality rights of women, as entrenched in the multicultural principles that underpin South Africa’s liberal, democratic order, adequately protected? In other words, could the individual rights of women (or gender rights) that are endorsed by liberalism, be deferred in the interest of respecting traditions and cultural values associated with ulwaluko? And if they are, I further ask: could the deferral of such rights be legitimate in the face of South Africa’s legal framework? The nature of this study places it in the qualitative paradigm, and interpretive phenomenology was the most appropriate research design to carry out the investigation. Multiculturalism is a principle at the centre of liberalism, and as a framework for this study, I contrast and reconcile it with feminism. While multiculturalism is concerned with protecting traditions and cultures of minority groups, feminism is concerned about women’s emancipation. I used the non-probability purposive sampling to select participants who were rich in information; and I made use of community structures to gain entry into research sites and to seek permission to carry out the investigation. I conducted the pilot study in Mdantsane, a township in the Buffalo City Municipality; and I gathered data in two research sites, namely: Flagstaff in Mpondondoland and Grahamstown in the Makana Local Municipality. I employed two qualitative methods to collect information, namely: focus group discussions (FGDs) and semi-structured in-depth interviews. A total of 70 participants took part in the study. 60 women participated in 8 focus groups and 10 participated in-depth interviews. Their ages ranged between 31 and 82 years. I recorded all the FGDs and semi-structured in-depth interviews that I conducted, for ease of transcription and translation. To interprete and analyze data, I applied the general inductive approach which I later substantiated with the use of NVivo 8, a computer assisted qualitative data analysis (CAQDAS). This resulted in the identification of four themes and their related sub-themes which I compared and contrasted with literature review and the theoretical framework, so as to make sense of the information I generated from the data collection process. I also discussed the results in line with the four goals of the study. The findings of this inquiry suggest a number of factors about ulwaluko, the following being the most significant: that firstly, although the rite is espoused and celebrated by some women as a significant cultural practice among amaXhosa, for others it is synonymous with patriarchy and hegemony. Secondly, women felt largely excluded, claiming that they were relegated to a subordinate position in society. For this reason, as well as because of the biomedical and other socio-political concerns associated with the practice, some women resented the custom. Thirdly, participants were divided about whether the practice should be continued or abolished; and these differences manifested within and between different regions. Fourthly, the results also demonstrated that the norms and values applied in ulwaluko are in contravention of the fundamental principles of a liberal state in that universal human rights are infringed upon through exclusionary practices. In this case the woman’s voice is muted; and this results in the denial of human agency. The study however, also revealed the emergence of shifting patterns in some parts of the province where an effort to include women appears to be taking place. Fifth and last, the enquiry demonstrated that ulwaluko is deeply entrenched among amaXhosa; that it has stood the test of time and is unlikely to be discontinued. Based on the results, I recommend that creative and transformative ways of addressing the evident clash between the provision of individual rights by the state and the recognition of ulwaluko as a cultural practice (which is perceived by some as harmful to women) be sought. To achieve this objective I make the following recommendations: 1) establishment and utilization of gender equality programmes; 2) modification of values and norms of the custom; 3) representation of women in decision-making structures; 4) establishment of collaborative networks; 5) widening of access to services (such as chapter nine institutions and national gender machinery); 6) documentation and sharing of effective and inclusive practices as well as; 7) creating awareness on initiation legislation.
- Full Text:
- Date Issued: 2018
- Authors: Gogela, Kholisa B
- Date: 2018
- Subjects: Initiation rites -- South Africa -- Eastern Cape , Circumcision -- South Africa -- Eastern Cape , Stigma (Social psychology) -- South Africa -- Eastern Cape , Xhosa (African people) -- South Africa -- Eastern Cape , Women -- Attitudes , Multiculturalism -- South Africa -- Eastern Cape , Women's rights -- South Africa -- Eastern Cape , Male domination (Social structure) -- South Africa -- Eastern Cape , Sex discrimination against women -- South Africa -- Eastern Cape , Ulwaluko
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61780 , vital:28059
- Description: This exploratory qualitative study sought to investigate the views and perceptions of women on their experiences of ulwaluko, a traditional rite practised by amaXhosa in the Eastern Cape province of South Africa. Ulwaluko is also known as isiko lokwaluka or ukoluka in isiXhosa. The concept refers not only to the act of circumcision that occurs during the initiation ritual but the entire process a boy goes through in observing this practice. Ulwaluko is performed in the belief that it will transform boys into accountable and responsible citizens of the society who are fully committed and dedicated to the tenets and standards of nation building. All amaXhosa boys are expected to undergo this tradition to be considered men. Failure to go to the initiation school usually results in social stigma and complete banishment by the society. There is an abundance of literature on studies that have been conducted on male circumcision (and not ulwaluko) which is performed for hygiene and religious purposes worldwide. With regards to ulwaluko of amaXhosa, research studies that have been conducted appear to lean mainly towards biomedical and public health aspects of the ritual. There seems to be an even bigger proportion of studies whose objective was to examine the relationship between circumcision and HIV/AIDS. From the literature review, it was not difficult to observe the pervasive paucity of research studies on women in relation to initiation (and that of amaXhosa in particular), with regards to their inclusion or exclusion in the practice, their feelings, perceptions, experiences and attitudes towards the custom. It is for this reason that I found it crucial to conduct this study. The main research question I sought to answer in this investigation was: are the human rights and gender equality rights of women, as entrenched in the multicultural principles that underpin South Africa’s liberal, democratic order, adequately protected? In other words, could the individual rights of women (or gender rights) that are endorsed by liberalism, be deferred in the interest of respecting traditions and cultural values associated with ulwaluko? And if they are, I further ask: could the deferral of such rights be legitimate in the face of South Africa’s legal framework? The nature of this study places it in the qualitative paradigm, and interpretive phenomenology was the most appropriate research design to carry out the investigation. Multiculturalism is a principle at the centre of liberalism, and as a framework for this study, I contrast and reconcile it with feminism. While multiculturalism is concerned with protecting traditions and cultures of minority groups, feminism is concerned about women’s emancipation. I used the non-probability purposive sampling to select participants who were rich in information; and I made use of community structures to gain entry into research sites and to seek permission to carry out the investigation. I conducted the pilot study in Mdantsane, a township in the Buffalo City Municipality; and I gathered data in two research sites, namely: Flagstaff in Mpondondoland and Grahamstown in the Makana Local Municipality. I employed two qualitative methods to collect information, namely: focus group discussions (FGDs) and semi-structured in-depth interviews. A total of 70 participants took part in the study. 60 women participated in 8 focus groups and 10 participated in-depth interviews. Their ages ranged between 31 and 82 years. I recorded all the FGDs and semi-structured in-depth interviews that I conducted, for ease of transcription and translation. To interprete and analyze data, I applied the general inductive approach which I later substantiated with the use of NVivo 8, a computer assisted qualitative data analysis (CAQDAS). This resulted in the identification of four themes and their related sub-themes which I compared and contrasted with literature review and the theoretical framework, so as to make sense of the information I generated from the data collection process. I also discussed the results in line with the four goals of the study. The findings of this inquiry suggest a number of factors about ulwaluko, the following being the most significant: that firstly, although the rite is espoused and celebrated by some women as a significant cultural practice among amaXhosa, for others it is synonymous with patriarchy and hegemony. Secondly, women felt largely excluded, claiming that they were relegated to a subordinate position in society. For this reason, as well as because of the biomedical and other socio-political concerns associated with the practice, some women resented the custom. Thirdly, participants were divided about whether the practice should be continued or abolished; and these differences manifested within and between different regions. Fourthly, the results also demonstrated that the norms and values applied in ulwaluko are in contravention of the fundamental principles of a liberal state in that universal human rights are infringed upon through exclusionary practices. In this case the woman’s voice is muted; and this results in the denial of human agency. The study however, also revealed the emergence of shifting patterns in some parts of the province where an effort to include women appears to be taking place. Fifth and last, the enquiry demonstrated that ulwaluko is deeply entrenched among amaXhosa; that it has stood the test of time and is unlikely to be discontinued. Based on the results, I recommend that creative and transformative ways of addressing the evident clash between the provision of individual rights by the state and the recognition of ulwaluko as a cultural practice (which is perceived by some as harmful to women) be sought. To achieve this objective I make the following recommendations: 1) establishment and utilization of gender equality programmes; 2) modification of values and norms of the custom; 3) representation of women in decision-making structures; 4) establishment of collaborative networks; 5) widening of access to services (such as chapter nine institutions and national gender machinery); 6) documentation and sharing of effective and inclusive practices as well as; 7) creating awareness on initiation legislation.
- Full Text:
- Date Issued: 2018
Performance evaluation and cost analysis of subsurface flow constructed wetlands designed for ammonium-nitrogen removal
- Authors: Tebitendwa, Sylvie Muwanga
- Date: 2018
- Subjects: Sewage Purification Nitrogen removal , Constructed wetlands , Bioremediation , Sewage lagoons , Coal mine waste
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61808 , vital:28062
- Description: Subsurface flow constructed wetlands (SSF CWs) is a low-cost, environmentally friendly sanitation technology for on-site treatment of domestic/municipal sewage. However, these systems are apparently unable to produce treated water of a quality suitable for discharge particularly in terms of nitrogen concentration, which has been attributed to design and operation based on biological oxygen demand as the parameter of choice. The aim of this study was to evaluate the performance, support medium, and techno-economics of a vertical- horizontal (V-H) SSF hybrid CW designed and operated using ammonium-nitrogen (NH4+-N) as the major parameter. Two pilot scale V-H SSF hybrid CWs were designed, constructed, and the performance of each monitored over two seasons and under two phases i.e. an initiation phase, and an optimization phase. Laboratory-scale horizontal SSF CWs were used to evaluate the support medium while the techno-economic study was framed to determine the cost effectiveness of V-H SSF hybrid CWs relative to high rate algal oxidation pond (HRAOP) systems to increase capacity of overloaded and/or under-performing waste stabilization pond (WSP) sewage treatment plants. Results revealed that under optimal operating conditions of hydraulic loading rate, hydraulic retention, and influent NH4+-N loading rate, treated water from the V-H SSF hybrid CWs achieved a quality commensurate with current South African standards for discharge into a surface water resource for all parameters except chemical oxygen demand and faecal coliforms. This suggests that NH4+-N is an important design and operational parameter for SSF CWs treating municipal sewage that is characterised as weak in terms of NH4+-N with a requirement of only simple disinfection such as chlorination to eliminate faecal coliforms. Use of discard coal to replace gravel as support medium in horizontal SSF CWs revealed an overall reduction in elemental composition of the discard coal support medium but without compromising water quality. This result strongly supports use of discard coal as an appropriate substrate for SSF CWs to achieve acceptable water quality. Furthermore, simultaneous degradation of discard coal during wastewater treatment demonstrates the versatility of SSF CWs for use in bio-remediation and pollution control. Finally, a technoeconomic assessment of V-H SSF hybrid CWs and a HRAOP series was carried out to determine the suitability of each process to increase capacity by mitigating dysfunctional and/or overloaded WSP sewage treatment plants. Analysis revealed that the quality of treated water from both systems was within the South African General Authorization standards for discharge to a surface water resource. Even so, each technology system presented its own set of limitations including; the inability to satisfactorily remove NH4+-N and chemical oxygen demand (i.e. for V-H SSF hybrid CWs) and total suspended solids and faecal coliforms (i.e. for HRAOPs), and a requirement for substantial land footprint while, HRAOPs required significantly less capital than V-H SSF hybrid CWs for implementation. The latter suggests that HRAOPs could be preferred over V-H SSF hybrid CWs as a technology of choice to increase the capacity of overloaded WSP sewage treatment plants especially where financial resources are limited. Overall, the results of this thesis indicate the potential to use NH4+-N as a design parameter in constructing SSF CWs treating weak strength municipal sewage (i.e. in terms of NH4+-N concentration) and to supplant gravel as the treatment media with industrial waste material like discard coal to achieve wastewater treatment, bio-remediation, and pollution control. The results of this work are discussed in terms of using SSF CWs as a passive and resilient technology for the treatment of domestic sewage in sub-Saharan Africa.
- Full Text:
- Date Issued: 2018
- Authors: Tebitendwa, Sylvie Muwanga
- Date: 2018
- Subjects: Sewage Purification Nitrogen removal , Constructed wetlands , Bioremediation , Sewage lagoons , Coal mine waste
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/61808 , vital:28062
- Description: Subsurface flow constructed wetlands (SSF CWs) is a low-cost, environmentally friendly sanitation technology for on-site treatment of domestic/municipal sewage. However, these systems are apparently unable to produce treated water of a quality suitable for discharge particularly in terms of nitrogen concentration, which has been attributed to design and operation based on biological oxygen demand as the parameter of choice. The aim of this study was to evaluate the performance, support medium, and techno-economics of a vertical- horizontal (V-H) SSF hybrid CW designed and operated using ammonium-nitrogen (NH4+-N) as the major parameter. Two pilot scale V-H SSF hybrid CWs were designed, constructed, and the performance of each monitored over two seasons and under two phases i.e. an initiation phase, and an optimization phase. Laboratory-scale horizontal SSF CWs were used to evaluate the support medium while the techno-economic study was framed to determine the cost effectiveness of V-H SSF hybrid CWs relative to high rate algal oxidation pond (HRAOP) systems to increase capacity of overloaded and/or under-performing waste stabilization pond (WSP) sewage treatment plants. Results revealed that under optimal operating conditions of hydraulic loading rate, hydraulic retention, and influent NH4+-N loading rate, treated water from the V-H SSF hybrid CWs achieved a quality commensurate with current South African standards for discharge into a surface water resource for all parameters except chemical oxygen demand and faecal coliforms. This suggests that NH4+-N is an important design and operational parameter for SSF CWs treating municipal sewage that is characterised as weak in terms of NH4+-N with a requirement of only simple disinfection such as chlorination to eliminate faecal coliforms. Use of discard coal to replace gravel as support medium in horizontal SSF CWs revealed an overall reduction in elemental composition of the discard coal support medium but without compromising water quality. This result strongly supports use of discard coal as an appropriate substrate for SSF CWs to achieve acceptable water quality. Furthermore, simultaneous degradation of discard coal during wastewater treatment demonstrates the versatility of SSF CWs for use in bio-remediation and pollution control. Finally, a technoeconomic assessment of V-H SSF hybrid CWs and a HRAOP series was carried out to determine the suitability of each process to increase capacity by mitigating dysfunctional and/or overloaded WSP sewage treatment plants. Analysis revealed that the quality of treated water from both systems was within the South African General Authorization standards for discharge to a surface water resource. Even so, each technology system presented its own set of limitations including; the inability to satisfactorily remove NH4+-N and chemical oxygen demand (i.e. for V-H SSF hybrid CWs) and total suspended solids and faecal coliforms (i.e. for HRAOPs), and a requirement for substantial land footprint while, HRAOPs required significantly less capital than V-H SSF hybrid CWs for implementation. The latter suggests that HRAOPs could be preferred over V-H SSF hybrid CWs as a technology of choice to increase the capacity of overloaded WSP sewage treatment plants especially where financial resources are limited. Overall, the results of this thesis indicate the potential to use NH4+-N as a design parameter in constructing SSF CWs treating weak strength municipal sewage (i.e. in terms of NH4+-N concentration) and to supplant gravel as the treatment media with industrial waste material like discard coal to achieve wastewater treatment, bio-remediation, and pollution control. The results of this work are discussed in terms of using SSF CWs as a passive and resilient technology for the treatment of domestic sewage in sub-Saharan Africa.
- Full Text:
- Date Issued: 2018
Performing the township: pantsula for life
- Van Niekerk, Heather Elizabeth
- Authors: Van Niekerk, Heather Elizabeth
- Date: 2018
- Subjects: Pantsula (Dance) South Africa Johannesburg , Pantsula (Dance) South Africa Makhanda , Dance Social aspects South Africa , Sophiatown (Johannesburg, South Africa)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/57874 , vital:26998
- Description: Pantsula dance is a performing art born from the townships of Johannesburg. It is a dance form performed across South Africa, in a variety of contexts; in theatres, music videos and competitions in community halls, on national and international stages and on television, and in the streets of townships, cities and suburbs across South Africa and abroad. Its performance is widespread, but it has its beginnings as a dance form born in areas created to marginalise and oppress. There is a scarcity of academic scholarship related to pantsula dance. This thesis aims to be a contribution to that pre-existing body of knowledge in the hope that there can be further engagement on this important, and increasingly mainstream, art form. I have focused my thesis on analysing pantsula dance as a performance of 'the township'. This has been attempted through an ethnographic engagement with pantsula dancers based in different township areas of Johannesburg and Graha mstown: various members of Impilo Mapantsula, Via Katlehong, Intellectuals Pantsula, Via Kasi Movers, Dlala Majimboz and the cast of Via Katlehong's Via Sophiatown. The research was conducted between 2013 and 2016 and serves to represent various moments within the ethnographic research process, while coming to understand various aspects of pantsula dance. An engagement with notions of 'the township', the clothing choices of the pantsula 'uniform', the core moves, inherent hybridity in the form itself, and the dedication to the dance form as a representation of the isipantsula 'way of life', are addressed throughout the thesis. As well as engaging with the memory and representation of Sophiatown as an important component to pantsula dance. Pantsula dance, an intrinsically South African dance form, provides a celebratory conception of 'the township' space and allows people from different backgrounds to engage in an important part of South Africa's past, present and future.
- Full Text:
- Date Issued: 2018
- Authors: Van Niekerk, Heather Elizabeth
- Date: 2018
- Subjects: Pantsula (Dance) South Africa Johannesburg , Pantsula (Dance) South Africa Makhanda , Dance Social aspects South Africa , Sophiatown (Johannesburg, South Africa)
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/57874 , vital:26998
- Description: Pantsula dance is a performing art born from the townships of Johannesburg. It is a dance form performed across South Africa, in a variety of contexts; in theatres, music videos and competitions in community halls, on national and international stages and on television, and in the streets of townships, cities and suburbs across South Africa and abroad. Its performance is widespread, but it has its beginnings as a dance form born in areas created to marginalise and oppress. There is a scarcity of academic scholarship related to pantsula dance. This thesis aims to be a contribution to that pre-existing body of knowledge in the hope that there can be further engagement on this important, and increasingly mainstream, art form. I have focused my thesis on analysing pantsula dance as a performance of 'the township'. This has been attempted through an ethnographic engagement with pantsula dancers based in different township areas of Johannesburg and Graha mstown: various members of Impilo Mapantsula, Via Katlehong, Intellectuals Pantsula, Via Kasi Movers, Dlala Majimboz and the cast of Via Katlehong's Via Sophiatown. The research was conducted between 2013 and 2016 and serves to represent various moments within the ethnographic research process, while coming to understand various aspects of pantsula dance. An engagement with notions of 'the township', the clothing choices of the pantsula 'uniform', the core moves, inherent hybridity in the form itself, and the dedication to the dance form as a representation of the isipantsula 'way of life', are addressed throughout the thesis. As well as engaging with the memory and representation of Sophiatown as an important component to pantsula dance. Pantsula dance, an intrinsically South African dance form, provides a celebratory conception of 'the township' space and allows people from different backgrounds to engage in an important part of South Africa's past, present and future.
- Full Text:
- Date Issued: 2018
Periglacial landforms of the Ahlmannryggen and Jutulsessen areas of western Dronning Maud land, Antarctica
- Authors: Wilmot, Nicola Frances
- Date: 2018
- Subjects: Periglacial processes Antarctica Queen Maud Land , Geomorphology Antarctica Queen Maud Land , Permafrost Antarctica Queen Maud Land , Freezes (Meteorology) Antarctica Queen Maud Land , Thawing Antarctica Queen Maud Land
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/61535 , vital:28034
- Description: Periglacial landforms are a common occurrence in Ahlmannryggen and Jutulsessen areas of western Dronning Maud land (WDML). Classification and formation of these landforms were disputed in literature. In Antarctica information on periglacial landforms is limited or confined to a specific landform. Thus a holistic approach was taken when investigating the periglacial landforms found in WDML. An overview of the existing knowledge base on periglacial landforms in WDML was given which was coupled with the analysis of archival data. The landforms found in this area were patterned ground, openwork block deposits (OBD), rock glaciers, terraces, a pronival rampart and lake ice blisters. With patterned ground being the common periglacial landform in WDML, heave monitoring was used where time-lapse videos were used to investigate the formation processes in patterned ground. From consolidating existing knowledge as well as adding new knowledge on the formation of periglacial landforms, it is clear that the landforms in Antarctica should not be compared to other examples, especially examples from the northern hemisphere. Further research in the formation of periglacial landforms is needed and can be further enhanced with more extensive use of the heave monitoring method in future research.
- Full Text:
- Date Issued: 2018
- Authors: Wilmot, Nicola Frances
- Date: 2018
- Subjects: Periglacial processes Antarctica Queen Maud Land , Geomorphology Antarctica Queen Maud Land , Permafrost Antarctica Queen Maud Land , Freezes (Meteorology) Antarctica Queen Maud Land , Thawing Antarctica Queen Maud Land
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/61535 , vital:28034
- Description: Periglacial landforms are a common occurrence in Ahlmannryggen and Jutulsessen areas of western Dronning Maud land (WDML). Classification and formation of these landforms were disputed in literature. In Antarctica information on periglacial landforms is limited or confined to a specific landform. Thus a holistic approach was taken when investigating the periglacial landforms found in WDML. An overview of the existing knowledge base on periglacial landforms in WDML was given which was coupled with the analysis of archival data. The landforms found in this area were patterned ground, openwork block deposits (OBD), rock glaciers, terraces, a pronival rampart and lake ice blisters. With patterned ground being the common periglacial landform in WDML, heave monitoring was used where time-lapse videos were used to investigate the formation processes in patterned ground. From consolidating existing knowledge as well as adding new knowledge on the formation of periglacial landforms, it is clear that the landforms in Antarctica should not be compared to other examples, especially examples from the northern hemisphere. Further research in the formation of periglacial landforms is needed and can be further enhanced with more extensive use of the heave monitoring method in future research.
- Full Text:
- Date Issued: 2018
Photosensitizer, pH sensing and optical limiting properties of BODIPY dyes
- Authors: May, Aviwe Khanya
- Date: 2018
- Subjects: Dyes and dyeing -- Chemistry , Halogenation , Photochemotherapy , Bromination , Photosensitizing compounds , Nonlinear optics , BODIPY dyes
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63964 , vital:28515
- Description: A series of BODIPY dyes have been successfully synthesised and structurally characterised to examine the effect of halogenation at the 2,6-positions and the introduction of styryl and vinylene groups at the 3,5-positions. The photophysical properties were studied, to assess the effect of the enhancement of the rate of intersystem crossing through halogenation on the fluorescence properties and the generation of reactive oxygen species. This is important in the assessment of the suitability of applying these molecules as photosensitizer dyes for photodynamic therapy and photodynamic antimicrobial chemotherapy. Upon bromination, the dyes showed moderately high singlet oxygen quantum yields. The inclusion of BODIPY dyes into cyclodextrins was explored since it makes them water soluble and hence suitable for biomedical applications, but no singlet oxygen was detected in aqueous media for the inclusion complexes. In order to red-shift the main spectral band of the BODIPY dyes into the therapeutic window, styryl groups were introduced at the 3,5-positions via a modified Knoevenagel condensation reaction. Since the main spectral band lies well above 532 nm, the second harmonic of the Nd:YAG laser, there is relatively weak absorbance at this wavelength. The 3,5-distyryl and 3,5-divinylene BODIPY dyes were assessed for their potential utility for application in nonlinear optics (NLO), and they demonstrated typical nonlinear absorption behaviour characterised by reverse saturable absorption (RSA) in z-scan measurements. Furthermore, the dyes possess excellent optical limiting parameters, such as their third-order suspectibility and hyperpolarizability values, in a wide range of solvents. One dye containing dimethylamino moieties on styryl groups attached at the 3,5-positions was assessed for potential application as an on/off fluorescence sensor. The dye proved to be successful, since intramolecular charge transfer in the S1 state was eliminated in the presence of acid and this results in a fluorescence “turn on” effect. This process was found to be reversible with the addition of a base.
- Full Text:
- Date Issued: 2018
- Authors: May, Aviwe Khanya
- Date: 2018
- Subjects: Dyes and dyeing -- Chemistry , Halogenation , Photochemotherapy , Bromination , Photosensitizing compounds , Nonlinear optics , BODIPY dyes
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63964 , vital:28515
- Description: A series of BODIPY dyes have been successfully synthesised and structurally characterised to examine the effect of halogenation at the 2,6-positions and the introduction of styryl and vinylene groups at the 3,5-positions. The photophysical properties were studied, to assess the effect of the enhancement of the rate of intersystem crossing through halogenation on the fluorescence properties and the generation of reactive oxygen species. This is important in the assessment of the suitability of applying these molecules as photosensitizer dyes for photodynamic therapy and photodynamic antimicrobial chemotherapy. Upon bromination, the dyes showed moderately high singlet oxygen quantum yields. The inclusion of BODIPY dyes into cyclodextrins was explored since it makes them water soluble and hence suitable for biomedical applications, but no singlet oxygen was detected in aqueous media for the inclusion complexes. In order to red-shift the main spectral band of the BODIPY dyes into the therapeutic window, styryl groups were introduced at the 3,5-positions via a modified Knoevenagel condensation reaction. Since the main spectral band lies well above 532 nm, the second harmonic of the Nd:YAG laser, there is relatively weak absorbance at this wavelength. The 3,5-distyryl and 3,5-divinylene BODIPY dyes were assessed for their potential utility for application in nonlinear optics (NLO), and they demonstrated typical nonlinear absorption behaviour characterised by reverse saturable absorption (RSA) in z-scan measurements. Furthermore, the dyes possess excellent optical limiting parameters, such as their third-order suspectibility and hyperpolarizability values, in a wide range of solvents. One dye containing dimethylamino moieties on styryl groups attached at the 3,5-positions was assessed for potential application as an on/off fluorescence sensor. The dye proved to be successful, since intramolecular charge transfer in the S1 state was eliminated in the presence of acid and this results in a fluorescence “turn on” effect. This process was found to be reversible with the addition of a base.
- Full Text:
- Date Issued: 2018
Poem to be sung
- Authors: Ndyoko, Nomtha
- Date: 2018
- Subjects: Creative writing (Higher education) -- South Africa , South African poetry (English) -- 21st century
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63592 , vital:28444
- Description: My collection of poems expresses the complexities that exist beneath the surface of my life – my tongue, our bleak country, the politics of having a dark skin, my ancestors who speak to me in unexplainable ways, and the speech of nature – the wind, the sea, death, birds. It is in writing poems and songs that I make a space to be alive, a space to meet my ancestors and to say the unsayable. The poems move between the ordinary, the magical, the abject, and the spiritual, often expressing the contradictions that exist within life. The main influence on my poetry has come from music, from African jazz musicians such as Zim Ngqawana, Thandiswa Mazwai and Msaki Mvana. Literary influences have come from Spanish poets such as Juan Ramón Jiménez, whose strong imagery and short lines capture profound emotion, and from ancient Chinese poetry that moves in a fluid and minimal way. I have also been inspired by the African spirituality expressed in Mazisi Kunene’s poetry and the down-to-earth associative poetry of Mangaliso Buzani and Mxolisi Nyezwa.
- Full Text:
- Date Issued: 2018
- Authors: Ndyoko, Nomtha
- Date: 2018
- Subjects: Creative writing (Higher education) -- South Africa , South African poetry (English) -- 21st century
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/63592 , vital:28444
- Description: My collection of poems expresses the complexities that exist beneath the surface of my life – my tongue, our bleak country, the politics of having a dark skin, my ancestors who speak to me in unexplainable ways, and the speech of nature – the wind, the sea, death, birds. It is in writing poems and songs that I make a space to be alive, a space to meet my ancestors and to say the unsayable. The poems move between the ordinary, the magical, the abject, and the spiritual, often expressing the contradictions that exist within life. The main influence on my poetry has come from music, from African jazz musicians such as Zim Ngqawana, Thandiswa Mazwai and Msaki Mvana. Literary influences have come from Spanish poets such as Juan Ramón Jiménez, whose strong imagery and short lines capture profound emotion, and from ancient Chinese poetry that moves in a fluid and minimal way. I have also been inspired by the African spirituality expressed in Mazisi Kunene’s poetry and the down-to-earth associative poetry of Mangaliso Buzani and Mxolisi Nyezwa.
- Full Text:
- Date Issued: 2018
Policy responses to the sexual and reproductive health of queer youth in the global south: a systematic review
- Authors: Moore, Sarah-Ann
- Date: 2018
- Subjects: Sexual minorities -- Africa , Sexual minorities -- Asia , Sexual minorities -- Caribbean Area , Sexual health -- Developing countries , Reproductive health -- Developing countries , Reproductive health services -- Developing countries , Communication in reproductive health -- Developing countries , Sexual minorities -- Youth -- Developing countries , Medical policy -- Developing countries , Homophobia -- Developing countries
- Language: English
- Type: text , Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/63021 , vital:28355
- Description: Concerns surrounding youth sexual and reproduction health (SRH) are deeply embedded within systems of heteronormativity and ciscentrism. Resultantly, youth SRH is filtered through a lens of heterosexual and cisgender experience, rendering invisible the SRH needs of queer youth. Importantly, a failure to recognise queer experiences of SRH has implications for normative subject positions, which enjoy stronger institutional support and constitute legitimate ways of being. As such, the failure to recognise queer youth as health care subjects within policy has far reaching consequences for their sexual and reproductive health. Within this research, a sexual and reproductive justice (SRJ) framework is adopted as a backdrop for exploring policy documents related to youth SRH within selected global South countries in Africa, Asia, and the Caribbean. The final data set comprises of 1035 policy excerpts extracted from 152 policies across these three regions. Research takes the form of a systematic review utilising a deductive framing and positioning thematic analysis. Analysis identifies framings of youth SRH and explores the subject positions assigned to queer youth in relation to these identified framings, with the understanding that the manner in which youth SRH concerns are framed and queer youth are positioned within policies provides an important foundation for the implementation of SRH-related policy. Findings demonstrate that policy responses to youth SRH are most often framed in terms of a public health approach. As a result, dominant understandings of youth SRH serve to reduce youth sexuality to notions of infections and impact, which may speak to an overreliance on biomedical and population-level health models. Themes emerging within human rights framings demonstrate a presumption that rights are equally afforded to, and freely exercised by, all individuals once legally secured, failing to engage with the creation of enabling conditions to realise these rights. Although context and culture framings were by no means exhaustive examples of SRJ, they provide an interesting insight into how such SRJ concerns might be integrated into policy. Importantly, policy responses demonstrate a general pattern hypervisibility of men who have sex with men (MSM) standing in marked contrast to the invisibility of queer youth and other adult queer populations. Within policy extracts, both youth and „MSM‟ are positioned as particularly prone to poor SRH outcomes. By virtue of their inclusion within both populations, queer youth may be considered as especially at risk for, or vulnerable to, such outcomes. Relatedly, these populations (and by extension queer youth) are positioned as in need of correction, containment, and/or protection by those occupying „gatekeeping‟ positions (e.g. health care providers). The positioning of „MSM‟ solely within the context of HIV/AIDS serves to link same-sex sexualities (and at times gender non-conformity) with harmful consequences, suggesting that the positioning of queer youth could similarly serve to conflate their SRH needs with concerns around HIV/AIDS. Many of the subject positions deployed in policies serve to deny the potential for youth and „MSM‟ agency, strength, and resilience. Thus, queer youth subjects are unlikely to be positioned as empowered, autonomous, and agentic. Across both framing and positioning themes, a number of key shortcomings were observed. For the most part, policy responses fail to acknowledge the influence of social, economic, political, and cultural forces that may serve to hinder SRH outcomes according to particular contexts and the intersection of multiple and varied social identities. By obscuring these broader contextual factors and power relations, policy responses may serve to hold individual youth responsible for poor SRH outcomes. In failing to engage with the potential for diversity within youth populations, these populations are largely homogenised. Finally, the need for the creation of an enabling environment in order to secure sexual and reproductive health is largely unacknowledged within policy responses.
- Full Text:
- Date Issued: 2018
- Authors: Moore, Sarah-Ann
- Date: 2018
- Subjects: Sexual minorities -- Africa , Sexual minorities -- Asia , Sexual minorities -- Caribbean Area , Sexual health -- Developing countries , Reproductive health -- Developing countries , Reproductive health services -- Developing countries , Communication in reproductive health -- Developing countries , Sexual minorities -- Youth -- Developing countries , Medical policy -- Developing countries , Homophobia -- Developing countries
- Language: English
- Type: text , Thesis , Masters , MSocSc
- Identifier: http://hdl.handle.net/10962/63021 , vital:28355
- Description: Concerns surrounding youth sexual and reproduction health (SRH) are deeply embedded within systems of heteronormativity and ciscentrism. Resultantly, youth SRH is filtered through a lens of heterosexual and cisgender experience, rendering invisible the SRH needs of queer youth. Importantly, a failure to recognise queer experiences of SRH has implications for normative subject positions, which enjoy stronger institutional support and constitute legitimate ways of being. As such, the failure to recognise queer youth as health care subjects within policy has far reaching consequences for their sexual and reproductive health. Within this research, a sexual and reproductive justice (SRJ) framework is adopted as a backdrop for exploring policy documents related to youth SRH within selected global South countries in Africa, Asia, and the Caribbean. The final data set comprises of 1035 policy excerpts extracted from 152 policies across these three regions. Research takes the form of a systematic review utilising a deductive framing and positioning thematic analysis. Analysis identifies framings of youth SRH and explores the subject positions assigned to queer youth in relation to these identified framings, with the understanding that the manner in which youth SRH concerns are framed and queer youth are positioned within policies provides an important foundation for the implementation of SRH-related policy. Findings demonstrate that policy responses to youth SRH are most often framed in terms of a public health approach. As a result, dominant understandings of youth SRH serve to reduce youth sexuality to notions of infections and impact, which may speak to an overreliance on biomedical and population-level health models. Themes emerging within human rights framings demonstrate a presumption that rights are equally afforded to, and freely exercised by, all individuals once legally secured, failing to engage with the creation of enabling conditions to realise these rights. Although context and culture framings were by no means exhaustive examples of SRJ, they provide an interesting insight into how such SRJ concerns might be integrated into policy. Importantly, policy responses demonstrate a general pattern hypervisibility of men who have sex with men (MSM) standing in marked contrast to the invisibility of queer youth and other adult queer populations. Within policy extracts, both youth and „MSM‟ are positioned as particularly prone to poor SRH outcomes. By virtue of their inclusion within both populations, queer youth may be considered as especially at risk for, or vulnerable to, such outcomes. Relatedly, these populations (and by extension queer youth) are positioned as in need of correction, containment, and/or protection by those occupying „gatekeeping‟ positions (e.g. health care providers). The positioning of „MSM‟ solely within the context of HIV/AIDS serves to link same-sex sexualities (and at times gender non-conformity) with harmful consequences, suggesting that the positioning of queer youth could similarly serve to conflate their SRH needs with concerns around HIV/AIDS. Many of the subject positions deployed in policies serve to deny the potential for youth and „MSM‟ agency, strength, and resilience. Thus, queer youth subjects are unlikely to be positioned as empowered, autonomous, and agentic. Across both framing and positioning themes, a number of key shortcomings were observed. For the most part, policy responses fail to acknowledge the influence of social, economic, political, and cultural forces that may serve to hinder SRH outcomes according to particular contexts and the intersection of multiple and varied social identities. By obscuring these broader contextual factors and power relations, policy responses may serve to hold individual youth responsible for poor SRH outcomes. In failing to engage with the potential for diversity within youth populations, these populations are largely homogenised. Finally, the need for the creation of an enabling environment in order to secure sexual and reproductive health is largely unacknowledged within policy responses.
- Full Text:
- Date Issued: 2018
Potential impact and host range of Pereskiophaga brasiliensis Anderson (Curculionidae): a new candidate biological control agent for the control of Pereskia aculeata Miller (Cactaceae) in South Africa
- Authors: Mdodana, Lumka Anita
- Date: 2018
- Subjects: Curculionidae -- South Africa , Cactus -- South Africa , Biological pest control agents , Alien plants-- South Africa , Pereskiophaga brasiliensis Anderson (Curculionidae) , Pereskia aculeata Miller (Cactaceae)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62350 , vital:28157
- Description: Pereskia aculeata Miller (Cactaceae) is a damaging invasive alien plant in South Africa that has negative impacts to indigenous biodiversity and ecosystem functioning. Mechanical and chemical control are not effective against P. aculeata so biological control is considered the only viable option. Two biological control agents, the leaf-feeding beetle Phenrica guerini Bechyne (Chrysomelidae) and the stem-wilting bug Catorhintha schaffneri (Coreidae), have been released in South Africa thus far. Post-release evaluations have indicated that P. guerini will not reduce P. aculeata densities to acceptable levels alone, while C. schaffneri was released very recently, so it is too soon to determine how effective that agent will be. Even if C. schaffneri is extremely damaging, it is likely that further agents will be required to reduce the densities of P. aculeata to acceptable levels within a reasonable time-scale. Additional agents should target the woody stems of P. aculeata which are not impacted by the damage of either of the released agents. Pereskiophaga brasiliensis Anderson (Curculionidae) is a promising potential candidate agent that feeds on the thick woody stems of the plant in the larval stage. Climatic matching, genetic matching and field based host specificity observations all indicated that P. brasiliensis was a promising candidate. In this study, the impact of P. brasiliensis to the target weed, P. aculeata, was quantified under quarantine conditions to determine whether it was sufficiently damaging to warrant release. This was followed by host specificity testing to determine whether P. brasiliensis was suitably host specific for release in South Africa. Impact studies indicated that P. brasiliensis was damaging to P. aculeata at insect densities that would be expected in the field. Pereskiophaga brasiliensis reduced the number of leaves of P. aculeata to a greater extent than it reduced shoot lengths, but both plant parameters were significantly reduced due to the feeding damage from the insect. This suggests that the damage from P. brasiliensis may be compatible with that of C. schaffneri which reduces shoot length to a greater degree than the number of leaves. Pereskiophaga brasiliensis is therefore sufficiently damaging to warrant release, and although interaction studies with the other agents would be required, it is expected that it should complement other existing agents. Although P. brasiliensis is sufficiently damaging, at present the host specificity data indicates that it is not suitably specific for release in South Africa because oviposition and larval development to the adult stage was recorded on both indigenous and alien plant species within the families Cactaceae and Basellaceae. This non-target feeding was recorded during no-choice tests, which are very conservative, but significant non-target damage and development to the adult stage was recorded on an indigenous plant from a different family to the target weed. Further host specificity testing, including paired and multiple choice tests, are required to confirm the broad host range of P. brasiliensis. Other biological control agents that damage the woody stems of P. aculeata should be considered. The stem-borer, Acanthodoxus machacalis (Cerambycidae) is considered the most promising of the other candidate agents as it can be sourced from a climatically matched region where genetically suitable P. aculeata plants are found, it is sufficiently damaging to the woody stems of P. aculeata and there is no evidence that the species has a broad host range. Acanthodoxus machacalis should be sourced from Rio de Janeiro, Brazil, and imported into quarantine in South Africa for host specificity testing.
- Full Text:
- Date Issued: 2018
- Authors: Mdodana, Lumka Anita
- Date: 2018
- Subjects: Curculionidae -- South Africa , Cactus -- South Africa , Biological pest control agents , Alien plants-- South Africa , Pereskiophaga brasiliensis Anderson (Curculionidae) , Pereskia aculeata Miller (Cactaceae)
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/62350 , vital:28157
- Description: Pereskia aculeata Miller (Cactaceae) is a damaging invasive alien plant in South Africa that has negative impacts to indigenous biodiversity and ecosystem functioning. Mechanical and chemical control are not effective against P. aculeata so biological control is considered the only viable option. Two biological control agents, the leaf-feeding beetle Phenrica guerini Bechyne (Chrysomelidae) and the stem-wilting bug Catorhintha schaffneri (Coreidae), have been released in South Africa thus far. Post-release evaluations have indicated that P. guerini will not reduce P. aculeata densities to acceptable levels alone, while C. schaffneri was released very recently, so it is too soon to determine how effective that agent will be. Even if C. schaffneri is extremely damaging, it is likely that further agents will be required to reduce the densities of P. aculeata to acceptable levels within a reasonable time-scale. Additional agents should target the woody stems of P. aculeata which are not impacted by the damage of either of the released agents. Pereskiophaga brasiliensis Anderson (Curculionidae) is a promising potential candidate agent that feeds on the thick woody stems of the plant in the larval stage. Climatic matching, genetic matching and field based host specificity observations all indicated that P. brasiliensis was a promising candidate. In this study, the impact of P. brasiliensis to the target weed, P. aculeata, was quantified under quarantine conditions to determine whether it was sufficiently damaging to warrant release. This was followed by host specificity testing to determine whether P. brasiliensis was suitably host specific for release in South Africa. Impact studies indicated that P. brasiliensis was damaging to P. aculeata at insect densities that would be expected in the field. Pereskiophaga brasiliensis reduced the number of leaves of P. aculeata to a greater extent than it reduced shoot lengths, but both plant parameters were significantly reduced due to the feeding damage from the insect. This suggests that the damage from P. brasiliensis may be compatible with that of C. schaffneri which reduces shoot length to a greater degree than the number of leaves. Pereskiophaga brasiliensis is therefore sufficiently damaging to warrant release, and although interaction studies with the other agents would be required, it is expected that it should complement other existing agents. Although P. brasiliensis is sufficiently damaging, at present the host specificity data indicates that it is not suitably specific for release in South Africa because oviposition and larval development to the adult stage was recorded on both indigenous and alien plant species within the families Cactaceae and Basellaceae. This non-target feeding was recorded during no-choice tests, which are very conservative, but significant non-target damage and development to the adult stage was recorded on an indigenous plant from a different family to the target weed. Further host specificity testing, including paired and multiple choice tests, are required to confirm the broad host range of P. brasiliensis. Other biological control agents that damage the woody stems of P. aculeata should be considered. The stem-borer, Acanthodoxus machacalis (Cerambycidae) is considered the most promising of the other candidate agents as it can be sourced from a climatically matched region where genetically suitable P. aculeata plants are found, it is sufficiently damaging to the woody stems of P. aculeata and there is no evidence that the species has a broad host range. Acanthodoxus machacalis should be sourced from Rio de Janeiro, Brazil, and imported into quarantine in South Africa for host specificity testing.
- Full Text:
- Date Issued: 2018
Practical application of distributed ledger technology in support of digital evidence integrity verification processes
- Authors: Weilbach, William Thomas
- Date: 2018
- Subjects: Digital forensic science , Blockchains (Databases) , Bitcoin , Distributed databases , Computer systems Verification
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/61872 , vital:28070
- Description: After its birth in cryptocurrencies, distributed ledger (blockchain) technology rapidly grew in popularity in other technology domains. Alternative applications of this technology range from digitizing the bank guarantees process for commercial property leases (Anz and IBM, 2017) to tracking the provenance of high-value physical goods (Everledger Ltd., 2017). As a whole, distributed ledger technology has acted as a catalyst to the rise of many innovative alternative solutions to existing problems, mostly associated with trust and integrity. In this research, a niche application of this technology is proposed for use in digital forensics by providing a mechanism for the transparent and irrefutable verification of digital evidence, ensuring its integrity as established blockchains serve as an ideal mechanism to store and validate arbitrary data against. Evaluation and identification of candidate technologies in this domain is based on a set of requirements derived from previous work in this field (Weilbach, 2014). OpenTimestamps (Todd, 2016b) is chosen as the foundation of further work for its robust architecture, transparent nature and multi-platform support. A robust evaluation and discussion of OpenTimestamps is performed to reinforce why it can be trusted as an implementation and protocol. An implementation of OpenTimestamps is designed for the popular open source forensic tool, Autopsy, and an Autopsy module is subsequently developed and released to the public. OpenTimestamps is tested at scale and found to have insignificant error rates for the verification of timestamps. Through practical implementation and extensive testing, it is shown that OpenTimestamps has the potential to significantly advance the practice of digital evidence integrity verification. A conclusion is reached by discussing some of the limitations of OpenTimestamps in terms of accuracy and error rates. It is shown that although OpenTimestamps has very specific timing claims in the attestation, with a near zero error rate, the actual attestation is truly accurate to within a day. This is followed by proposing potential avenues for future work.
- Full Text:
- Date Issued: 2018
- Authors: Weilbach, William Thomas
- Date: 2018
- Subjects: Digital forensic science , Blockchains (Databases) , Bitcoin , Distributed databases , Computer systems Verification
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/61872 , vital:28070
- Description: After its birth in cryptocurrencies, distributed ledger (blockchain) technology rapidly grew in popularity in other technology domains. Alternative applications of this technology range from digitizing the bank guarantees process for commercial property leases (Anz and IBM, 2017) to tracking the provenance of high-value physical goods (Everledger Ltd., 2017). As a whole, distributed ledger technology has acted as a catalyst to the rise of many innovative alternative solutions to existing problems, mostly associated with trust and integrity. In this research, a niche application of this technology is proposed for use in digital forensics by providing a mechanism for the transparent and irrefutable verification of digital evidence, ensuring its integrity as established blockchains serve as an ideal mechanism to store and validate arbitrary data against. Evaluation and identification of candidate technologies in this domain is based on a set of requirements derived from previous work in this field (Weilbach, 2014). OpenTimestamps (Todd, 2016b) is chosen as the foundation of further work for its robust architecture, transparent nature and multi-platform support. A robust evaluation and discussion of OpenTimestamps is performed to reinforce why it can be trusted as an implementation and protocol. An implementation of OpenTimestamps is designed for the popular open source forensic tool, Autopsy, and an Autopsy module is subsequently developed and released to the public. OpenTimestamps is tested at scale and found to have insignificant error rates for the verification of timestamps. Through practical implementation and extensive testing, it is shown that OpenTimestamps has the potential to significantly advance the practice of digital evidence integrity verification. A conclusion is reached by discussing some of the limitations of OpenTimestamps in terms of accuracy and error rates. It is shown that although OpenTimestamps has very specific timing claims in the attestation, with a near zero error rate, the actual attestation is truly accurate to within a day. This is followed by proposing potential avenues for future work.
- Full Text:
- Date Issued: 2018
Pregnant women’s construction of social support from their intimate partners during pregnancy
- Authors: Bottoman, Phathiswa Esona
- Date: 2018
- Subjects: Pregnant women -- South Africa -- Eastern Cape -- Relations with men Pregnancy -- Psychological aspects Pregnant women -- Social conditions
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/62560 , vital:28207
- Description: There is a growing body of research aimed at understanding social support during pregnancy in South Africa. Pregnancy is constantly referred to as one of the challenging and stressful periods affecting women’s physical and psychological well-being. Various research studies on social support argue that social support is paramount at this stage. Research on social support indicates that having adequate and quality social support impacts on how pregnant women experience pregnancy. My interest in social support comes in the wake of absent fathers in South Africa and with the emerging trend of “new” fathers. Although there is a volume of research on social support, it tends to be realist. Using a social constructionist framework, I explore other ways of talking about social support in an attempt to expand the discourse around social support. I explore how pregnant women talk about social support during pregnancy from their intimate partners in the small rural municipality of Elundini, Eastern Cape, South Africa. Intimate partner support was limited to heterosexual partners regardless of their marital status. The sampling procedure followed a non-probability sampling method. Participants of the study were between 24 and 32 years old. Their gestational age ranged between five and eight months. Fourteen in-depth interviews using photo-elicitation were conducted with seven participants and were analysed using a social constructionist informed thematic analysis. The major theme that emerged from the analysis was partner involvement and absence during pregnancy. The analysis of results suggests that expectant father presence translates to social support. Participants constructed his presence as reassurance in the context of possible abandonment. Absence was constructed in different ways: participants constructed absence as unjust and unfair, absence and marriage, temporary absence in the form of cultural phenomenon of ukwaliswa/ukubukubazana, absence as normal but burdening to the pregnant women’s social network. Participants reported that social support from the expectant father affected pregnancy wantedness.
- Full Text:
- Date Issued: 2018
- Authors: Bottoman, Phathiswa Esona
- Date: 2018
- Subjects: Pregnant women -- South Africa -- Eastern Cape -- Relations with men Pregnancy -- Psychological aspects Pregnant women -- Social conditions
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10962/62560 , vital:28207
- Description: There is a growing body of research aimed at understanding social support during pregnancy in South Africa. Pregnancy is constantly referred to as one of the challenging and stressful periods affecting women’s physical and psychological well-being. Various research studies on social support argue that social support is paramount at this stage. Research on social support indicates that having adequate and quality social support impacts on how pregnant women experience pregnancy. My interest in social support comes in the wake of absent fathers in South Africa and with the emerging trend of “new” fathers. Although there is a volume of research on social support, it tends to be realist. Using a social constructionist framework, I explore other ways of talking about social support in an attempt to expand the discourse around social support. I explore how pregnant women talk about social support during pregnancy from their intimate partners in the small rural municipality of Elundini, Eastern Cape, South Africa. Intimate partner support was limited to heterosexual partners regardless of their marital status. The sampling procedure followed a non-probability sampling method. Participants of the study were between 24 and 32 years old. Their gestational age ranged between five and eight months. Fourteen in-depth interviews using photo-elicitation were conducted with seven participants and were analysed using a social constructionist informed thematic analysis. The major theme that emerged from the analysis was partner involvement and absence during pregnancy. The analysis of results suggests that expectant father presence translates to social support. Participants constructed his presence as reassurance in the context of possible abandonment. Absence was constructed in different ways: participants constructed absence as unjust and unfair, absence and marriage, temporary absence in the form of cultural phenomenon of ukwaliswa/ukubukubazana, absence as normal but burdening to the pregnant women’s social network. Participants reported that social support from the expectant father affected pregnancy wantedness.
- Full Text:
- Date Issued: 2018
Preimages for SHA-1
- Authors: Motara, Yusuf Moosa
- Date: 2018
- Subjects: Data encryption (Computer science) , Computer security -- Software , Hashing (Computer science) , Data compression (Computer science) , Preimage , Secure Hash Algorithm 1 (SHA-1)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/57885 , vital:27004
- Description: This research explores the problem of finding a preimage — an input that, when passed through a particular function, will result in a pre-specified output — for the compression function of the SHA-1 cryptographic hash. This problem is much more difficult than the problem of finding a collision for a hash function, and preimage attacks for very few popular hash functions are known. The research begins by introducing the field and giving an overview of the existing work in the area. A thorough analysis of the compression function is made, resulting in alternative formulations for both parts of the function, and both statistical and theoretical tools to determine the difficulty of the SHA-1 preimage problem. Different representations (And- Inverter Graph, Binary Decision Diagram, Conjunctive Normal Form, Constraint Satisfaction form, and Disjunctive Normal Form) and associated tools to manipulate and/or analyse these representations are then applied and explored, and results are collected and interpreted. In conclusion, the SHA-1 preimage problem remains unsolved and insoluble for the foreseeable future. The primary issue is one of efficient representation; despite a promising theoretical difficulty, both the diffusion characteristics and the depth of the tree stand in the way of efficient search. Despite this, the research served to confirm and quantify the difficulty of the problem both theoretically, using Schaefer's Theorem, and practically, in the context of different representations.
- Full Text:
- Date Issued: 2018
- Authors: Motara, Yusuf Moosa
- Date: 2018
- Subjects: Data encryption (Computer science) , Computer security -- Software , Hashing (Computer science) , Data compression (Computer science) , Preimage , Secure Hash Algorithm 1 (SHA-1)
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/57885 , vital:27004
- Description: This research explores the problem of finding a preimage — an input that, when passed through a particular function, will result in a pre-specified output — for the compression function of the SHA-1 cryptographic hash. This problem is much more difficult than the problem of finding a collision for a hash function, and preimage attacks for very few popular hash functions are known. The research begins by introducing the field and giving an overview of the existing work in the area. A thorough analysis of the compression function is made, resulting in alternative formulations for both parts of the function, and both statistical and theoretical tools to determine the difficulty of the SHA-1 preimage problem. Different representations (And- Inverter Graph, Binary Decision Diagram, Conjunctive Normal Form, Constraint Satisfaction form, and Disjunctive Normal Form) and associated tools to manipulate and/or analyse these representations are then applied and explored, and results are collected and interpreted. In conclusion, the SHA-1 preimage problem remains unsolved and insoluble for the foreseeable future. The primary issue is one of efficient representation; despite a promising theoretical difficulty, both the diffusion characteristics and the depth of the tree stand in the way of efficient search. Despite this, the research served to confirm and quantify the difficulty of the problem both theoretically, using Schaefer's Theorem, and practically, in the context of different representations.
- Full Text:
- Date Issued: 2018
Primary controls on iron and manganese distribution in sphalerite of the Gams Formation, Gamsberg zinc deposit, Namaqualand, South Africa
- Authors: Poignant-Molina, Léo
- Date: 2018
- Subjects: Sphalerite , Sphalerite South Africa Gamsberg , Manganese South Africa Gamsberg , Zinc mines and mining South Africa Gamsberg , Geochemistry South Africa Gamsberg , Metamorphism (Geology) , Electron probe microanalysis
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63775 , vital:28488
- Description: The Gamsberg deposit is a 200 Mt zinc reserve belonging to the world class base metalrich Aggeneys-Gamsberg mining district. A rifting environment permitted the development of four proximal SEDEX-type deposits whereby Gamsberg is localized in the eastern side of the district and characterised by a peculiar enrichment in manganese. This study investigates the geochemistry of sphalerite in the Gams Formation holding the economic units of the deposit. Microscopic petrography revealed that most of primary textures have been overprinted by recrystallization, alteration, replacement and deformational textures produced during the polyphase metamorphism of the Namaquan Orogeny. Therefore, EPMA analysis provided the bulk of information to define the geochemical distribution of sphalerite. A lateral variation was noticed throughout the Gams Formation, whereby the North orebody presents Zn-rich and Fe+Mn-poor sphalerite while the West and East orebodies contain Zn-poor and Fe-Mn-rich sphalerite. This feature has been interpreted as the association of a chemocline and a variation in the basin topography defining deep Mn+Fe-rich zones and shallow Mn+Fe-poor zones in the primitive basin. It is suggested that mineralized hot brines mixed with seawater developed the chemocline. The uneven topography shaped the geochemical variation between the actual orebodies.
- Full Text:
- Date Issued: 2018
- Authors: Poignant-Molina, Léo
- Date: 2018
- Subjects: Sphalerite , Sphalerite South Africa Gamsberg , Manganese South Africa Gamsberg , Zinc mines and mining South Africa Gamsberg , Geochemistry South Africa Gamsberg , Metamorphism (Geology) , Electron probe microanalysis
- Language: English
- Type: text , Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/63775 , vital:28488
- Description: The Gamsberg deposit is a 200 Mt zinc reserve belonging to the world class base metalrich Aggeneys-Gamsberg mining district. A rifting environment permitted the development of four proximal SEDEX-type deposits whereby Gamsberg is localized in the eastern side of the district and characterised by a peculiar enrichment in manganese. This study investigates the geochemistry of sphalerite in the Gams Formation holding the economic units of the deposit. Microscopic petrography revealed that most of primary textures have been overprinted by recrystallization, alteration, replacement and deformational textures produced during the polyphase metamorphism of the Namaquan Orogeny. Therefore, EPMA analysis provided the bulk of information to define the geochemical distribution of sphalerite. A lateral variation was noticed throughout the Gams Formation, whereby the North orebody presents Zn-rich and Fe+Mn-poor sphalerite while the West and East orebodies contain Zn-poor and Fe-Mn-rich sphalerite. This feature has been interpreted as the association of a chemocline and a variation in the basin topography defining deep Mn+Fe-rich zones and shallow Mn+Fe-poor zones in the primitive basin. It is suggested that mineralized hot brines mixed with seawater developed the chemocline. The uneven topography shaped the geochemical variation between the actual orebodies.
- Full Text:
- Date Issued: 2018
Production, purification, and characterisation of proteases from an ericoid mycorrhizal fungus, Oidiodendron maius
- Authors: Manyumwa, Colleen Varaidzo
- Date: 2018
- Subjects: Ascomycetes , Mycorrhizal fungi , Ericaceae , Proteolytic enzymes , Silver Recycling
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/62833 , vital:28298
- Description: The aim of this study was to produce, purify and characterise proteases from the ericoid mycorrhizal fungus, Oidiodendron maius (CafRU082b/KP119480), as well as to explore their potential application in the recovery of silver from X-ray film. Firstly, the growth of the ericoid mycorrhizal fungus, Oidiodendron maius (CafRU082b), was studied, and its ability to produce proteolytic enzymes was investigated. O. maius proved to grow well in the dark, submerged in Modified Melin Norkran’s liquid medium at a pH of 5 and at 25°C. Pure cultures of the fungus were maintained on Potato Dextrose Agar (PDA). The fungus grew on PDA plates containing different substrates including haemoglobin, casein, gelatin as well as azocasein. Zones of clearance, however, were only observed on plates containing gelatin after treatment with mercuric chloride, HgCl2. Proteases were successfully produced after 14 days when gelatin was incorporated into the growth medium. After production of the proteases, purification and characterisation of the enzymes was performed. Purification of the enzymes was performed by acetone precipitation followed by ultrafiltration with 50 kDa and 30 kDa cut off membrane filters. A final purification fold of approximately 37.6 was achieved. Unusual yields of above 100% were observed after each purification step with the final yield achieved being 196% with a final specific activity of 2707 U/mg. SDS-PAGE revealed a protease band of 35 kDa which was also visible on the zymogram at approximately 36 kDa. The zymogram showed clear hydrolysis bands against a blue background after staining with Coomassie Brilliant Blue. Physico-chemical characterisation of the protease revealed its pH optimum to be pH 3.0 and its temperature optimum 68°C. Another peak was observed on the pH profile at pH 7.0. The protease exhibited high thermostability at temperatures 37°C, 80°C as well as 100°C with the enzyme retaining close to 50% of its initial activity after 4 h of exposure to all three temperatures. All ions tested for their effects on the proteases, except Ca2+, enhanced protease activity. Ca2+ did not exhibit any significant effect on the enzyme’s activity while Zn2+ had the highest effect, enhancing enzyme activity by 305%. The proteases, however, were not significantly inhibited by EDTA, a metal chelating agent and a known metalloprotease inhibitor. The enzyme was classified as an aspartic protease due to complete inhibition by 25 μM of pepstatin A, coupled to its low pH optimum of 3.0. Addition of trans-Epoxysuccinyl-L-leucylamido-(4-guanidino)butane (E-64), a cysteine protease inhibitor, and 2-mercaptoethanol increased protease activity. The proteases exhibited a narrow substrate specificity towards gelatin and no other substrate. Substrate kinetics values were plotted on a Michaelis-Menten Graph and showed that the enzyme had a Vmax of 55.25 U/ml and a Km of 2.7 mg/ml gelatin. A low Km indicated that the protease had a high affinity for gelatin. Silver recovery studies from X-ray film revealed the proteases’ capability to remove silver from X-ray film, leaving the film intact. The recovery of silver was perceived visually, by film observation, as well as by scan electron microscopy (SEM) images, where clearance of the film was observed after incubation with the enzyme. Energy dispersive X-ray spectroscopy (EDS) profiles also confirmed removal of silver from the film, with a Ag peak showing on the profile of the film before treatment with the proteases and no peak after treatment. The crude protease sample was, however, catalytically more efficient compared to the partially purified sample. , Thesis (MSc) -- Faculty of Science, Biochemistry and Microbiology, 2018
- Full Text:
- Date Issued: 2018
- Authors: Manyumwa, Colleen Varaidzo
- Date: 2018
- Subjects: Ascomycetes , Mycorrhizal fungi , Ericaceae , Proteolytic enzymes , Silver Recycling
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/62833 , vital:28298
- Description: The aim of this study was to produce, purify and characterise proteases from the ericoid mycorrhizal fungus, Oidiodendron maius (CafRU082b/KP119480), as well as to explore their potential application in the recovery of silver from X-ray film. Firstly, the growth of the ericoid mycorrhizal fungus, Oidiodendron maius (CafRU082b), was studied, and its ability to produce proteolytic enzymes was investigated. O. maius proved to grow well in the dark, submerged in Modified Melin Norkran’s liquid medium at a pH of 5 and at 25°C. Pure cultures of the fungus were maintained on Potato Dextrose Agar (PDA). The fungus grew on PDA plates containing different substrates including haemoglobin, casein, gelatin as well as azocasein. Zones of clearance, however, were only observed on plates containing gelatin after treatment with mercuric chloride, HgCl2. Proteases were successfully produced after 14 days when gelatin was incorporated into the growth medium. After production of the proteases, purification and characterisation of the enzymes was performed. Purification of the enzymes was performed by acetone precipitation followed by ultrafiltration with 50 kDa and 30 kDa cut off membrane filters. A final purification fold of approximately 37.6 was achieved. Unusual yields of above 100% were observed after each purification step with the final yield achieved being 196% with a final specific activity of 2707 U/mg. SDS-PAGE revealed a protease band of 35 kDa which was also visible on the zymogram at approximately 36 kDa. The zymogram showed clear hydrolysis bands against a blue background after staining with Coomassie Brilliant Blue. Physico-chemical characterisation of the protease revealed its pH optimum to be pH 3.0 and its temperature optimum 68°C. Another peak was observed on the pH profile at pH 7.0. The protease exhibited high thermostability at temperatures 37°C, 80°C as well as 100°C with the enzyme retaining close to 50% of its initial activity after 4 h of exposure to all three temperatures. All ions tested for their effects on the proteases, except Ca2+, enhanced protease activity. Ca2+ did not exhibit any significant effect on the enzyme’s activity while Zn2+ had the highest effect, enhancing enzyme activity by 305%. The proteases, however, were not significantly inhibited by EDTA, a metal chelating agent and a known metalloprotease inhibitor. The enzyme was classified as an aspartic protease due to complete inhibition by 25 μM of pepstatin A, coupled to its low pH optimum of 3.0. Addition of trans-Epoxysuccinyl-L-leucylamido-(4-guanidino)butane (E-64), a cysteine protease inhibitor, and 2-mercaptoethanol increased protease activity. The proteases exhibited a narrow substrate specificity towards gelatin and no other substrate. Substrate kinetics values were plotted on a Michaelis-Menten Graph and showed that the enzyme had a Vmax of 55.25 U/ml and a Km of 2.7 mg/ml gelatin. A low Km indicated that the protease had a high affinity for gelatin. Silver recovery studies from X-ray film revealed the proteases’ capability to remove silver from X-ray film, leaving the film intact. The recovery of silver was perceived visually, by film observation, as well as by scan electron microscopy (SEM) images, where clearance of the film was observed after incubation with the enzyme. Energy dispersive X-ray spectroscopy (EDS) profiles also confirmed removal of silver from the film, with a Ag peak showing on the profile of the film before treatment with the proteases and no peak after treatment. The crude protease sample was, however, catalytically more efficient compared to the partially purified sample. , Thesis (MSc) -- Faculty of Science, Biochemistry and Microbiology, 2018
- Full Text:
- Date Issued: 2018