Nonlinear optical properties of metal free thio alkyl and tert-butyl phenoxy phthalocyanine
- Authors: Joseph, Otto
- Date: 2021-10
- Subjects: Nonlinear optics , Phthalocyanines , Time-dependent density functional theory , Magnetic circular dichroism , Reverse saturable absorption (RSA) , Real Time Dependent Density Functional Theory (RT-TDDFT)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/190712 , vital:45021
- Description: This work reports on the nonlinear optical properties of tetra - and octa substituted phthalocyanines (Pcs) utilising pentane thiol and 4-tertbutyl phenol as substituents. Their nonlinear absorption coefficient (𝛽) and absorption cross sections were determined using the Z-scan technique with a 10 ns pulse laser at 532 nm. The molecular second order hyperpolarizability Im[γ] was observed and the following Im[γ] trend was obtained for 𝛼-H2Pc(SC5H11)4 isomers, 5.93 ×10−31 (Cs) 2.24×10−32(D2h) > 1.21×10−32(C4h) > 1.05×10−32 (C2v) esu, respectively, in chloroform. Symmetry was seen to have an effect on the observed reverse saturable absorption (RSA) response. Based on the five level model rate equation nonlinear fit of the RSA response curves and Real Time Time Dependant Density Functional Theory (RT-TDDFT) results, the singlet excited state population dynamics was found to play a significant role in producing the observed Im[γ] trend. , Thesis (MSc) -- Faculty of Science, Chemistry, 2021
- Full Text:
- Date Issued: 2021-10
- Authors: Joseph, Otto
- Date: 2021-10
- Subjects: Nonlinear optics , Phthalocyanines , Time-dependent density functional theory , Magnetic circular dichroism , Reverse saturable absorption (RSA) , Real Time Dependent Density Functional Theory (RT-TDDFT)
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10962/190712 , vital:45021
- Description: This work reports on the nonlinear optical properties of tetra - and octa substituted phthalocyanines (Pcs) utilising pentane thiol and 4-tertbutyl phenol as substituents. Their nonlinear absorption coefficient (𝛽) and absorption cross sections were determined using the Z-scan technique with a 10 ns pulse laser at 532 nm. The molecular second order hyperpolarizability Im[γ] was observed and the following Im[γ] trend was obtained for 𝛼-H2Pc(SC5H11)4 isomers, 5.93 ×10−31 (Cs) 2.24×10−32(D2h) > 1.21×10−32(C4h) > 1.05×10−32 (C2v) esu, respectively, in chloroform. Symmetry was seen to have an effect on the observed reverse saturable absorption (RSA) response. Based on the five level model rate equation nonlinear fit of the RSA response curves and Real Time Time Dependant Density Functional Theory (RT-TDDFT) results, the singlet excited state population dynamics was found to play a significant role in producing the observed Im[γ] trend. , Thesis (MSc) -- Faculty of Science, Chemistry, 2021
- Full Text:
- Date Issued: 2021-10
The readiness of embracing the fourth industrial revolution disruptive innovations: a case for an automotive assembler in the Nelson Mandela Metropole
- Authors: Mbolekwa, Luvuyo
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52988 , vital:44866
- Description: Organisations and people find themselves in the era of what is known as the Fourth Industrial Revolution (4IR). Unlike the preceding revolutions, this revolution is characterised by technological advancements that lead to disruptive phenomena. These advancements are growing at an exponential rate. They have brought disruptive innovations that have either reshaped many industries, causing them to lose market share or exit altogether. Some organisations are keen to embrace disruptive innovation to ensure that they are sustainable into the future, while others are only inclined to use known technologies to leverage economies of scale. The 4IR has already been around for a while and is moving at a fast pace. The level of readiness for the automotive assembler, Isuzu Motors South Africa (IMSAf), to take advantage of such technological changes brought by the 4IR, has not yet been measured. The primary objective of this study is to investigate IMSAf’s perceptions and readiness to embrace technological changes brought by the 4IR. The perceptions and readiness are assessed based on the technology embracing organisational framework of efficiencies, innovation, skills and re-training. This study is grounded in the philosophy of positivism and the related method used is a quantitative study to test the research questions in an objective manner. A questionnaire was the sole method of collecting first-hand data from the selected sample. The population size consisted of 139 respondents working in various business units within IMSAf. These individuals are occupying various roles and they have in depth, tacit, and multi-disciplinary knowledge of processes and would be the first to experience technological changes brought by the 4IR. A quantitative analysis technique is applied, such as descriptive and inferential statistics, to analyse data. A literature review on the topic was conducted as well as an empirical study. The results from both the literature review and the empirical study found that with the implementation of 4IR emerging technologies within an organisation, there is a significant improvement on efficiencies, innovation and skills and re-training. Furthermore, the level of awareness and understanding about the benefits of embracing 4IR emerging technologies within IMSAf is significant. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
- Authors: Mbolekwa, Luvuyo
- Date: 2021-04
- Subjects: Gqeberha (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/52988 , vital:44866
- Description: Organisations and people find themselves in the era of what is known as the Fourth Industrial Revolution (4IR). Unlike the preceding revolutions, this revolution is characterised by technological advancements that lead to disruptive phenomena. These advancements are growing at an exponential rate. They have brought disruptive innovations that have either reshaped many industries, causing them to lose market share or exit altogether. Some organisations are keen to embrace disruptive innovation to ensure that they are sustainable into the future, while others are only inclined to use known technologies to leverage economies of scale. The 4IR has already been around for a while and is moving at a fast pace. The level of readiness for the automotive assembler, Isuzu Motors South Africa (IMSAf), to take advantage of such technological changes brought by the 4IR, has not yet been measured. The primary objective of this study is to investigate IMSAf’s perceptions and readiness to embrace technological changes brought by the 4IR. The perceptions and readiness are assessed based on the technology embracing organisational framework of efficiencies, innovation, skills and re-training. This study is grounded in the philosophy of positivism and the related method used is a quantitative study to test the research questions in an objective manner. A questionnaire was the sole method of collecting first-hand data from the selected sample. The population size consisted of 139 respondents working in various business units within IMSAf. These individuals are occupying various roles and they have in depth, tacit, and multi-disciplinary knowledge of processes and would be the first to experience technological changes brought by the 4IR. A quantitative analysis technique is applied, such as descriptive and inferential statistics, to analyse data. A literature review on the topic was conducted as well as an empirical study. The results from both the literature review and the empirical study found that with the implementation of 4IR emerging technologies within an organisation, there is a significant improvement on efficiencies, innovation and skills and re-training. Furthermore, the level of awareness and understanding about the benefits of embracing 4IR emerging technologies within IMSAf is significant. , Thesis (MBA) -- Faculty of Business and Economic Sciences, NMU Business School, 2021
- Full Text: false
- Date Issued: 2021-04
The effects of point of substitution on the formation of manganese phthalocyanine-based molecular materials
- Akinbulu, Isaac Adebayo, Khene, Samson, Nyokong, Tebello
- Authors: Akinbulu, Isaac Adebayo , Khene, Samson , Nyokong, Tebello
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/249103 , vital:51778 , xlink:href="https://doi.org/10.1016/j.tsf.2010.08.145"
- Description: Molecular films of manganese phthalocyanine (MnPc) complexes, tetra-substituted with 2-diethylaminoethanethio at the peripheral (Mn(OAc)-β-TDEAETPc, 1) and non-peripheral (Mn(OAc)-α-TDEAETPc, 2) positions were formed on glassy carbon electrode by electropolymerization and electrodeposition respectively. Atomic force microscopy images confirmed the presence of the films and revealed significant morphological differences. The films exhibited an electrocatalytic activity towards the oxidation of the insecticide, bendiocarb. Hydrodynamic technique, using rotating disc electrode voltammetry, was used to investigate the kinetics of electro-oxidation of the insecticide. Morphological differences of the films significantly influenced kinetic parameters. Values of Tafel slopes, obtained from Tafel plots, suggested that catalysis of bendiocarb occurred via outer sphere mechanism.
- Full Text:
- Date Issued: 2010
- Authors: Akinbulu, Isaac Adebayo , Khene, Samson , Nyokong, Tebello
- Date: 2010
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/249103 , vital:51778 , xlink:href="https://doi.org/10.1016/j.tsf.2010.08.145"
- Description: Molecular films of manganese phthalocyanine (MnPc) complexes, tetra-substituted with 2-diethylaminoethanethio at the peripheral (Mn(OAc)-β-TDEAETPc, 1) and non-peripheral (Mn(OAc)-α-TDEAETPc, 2) positions were formed on glassy carbon electrode by electropolymerization and electrodeposition respectively. Atomic force microscopy images confirmed the presence of the films and revealed significant morphological differences. The films exhibited an electrocatalytic activity towards the oxidation of the insecticide, bendiocarb. Hydrodynamic technique, using rotating disc electrode voltammetry, was used to investigate the kinetics of electro-oxidation of the insecticide. Morphological differences of the films significantly influenced kinetic parameters. Values of Tafel slopes, obtained from Tafel plots, suggested that catalysis of bendiocarb occurred via outer sphere mechanism.
- Full Text:
- Date Issued: 2010
Studies on the Zoarcidae, (Teleostei: Perciformes) of the Southern hemisphere. III. The Southwestern Pacific
- Anderson, M Eric, J.L.B. Smith Institute of Ichthyology
- Authors: Anderson, M Eric , J.L.B. Smith Institute of Ichthyology
- Date: 1990-07
- Subjects: Zoarcidae , Fishes -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70348 , vital:29647 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 50 , The eelpout fauna of the southwestern Pacific presently includes 6 species, one of which, Pachycara garricki, is described as new. Full species accounts and illustrations are also provided for Melanostigma inexpectatum, Ophthalmolycus campbellensis, and Lycenchelys maoriorum, known previously only from the meager type series. Two species, Melanostigma gelatinosum, and M. vitiazi were redescribed in the first part of this series, but expanded diagnoses are provided here. Lycenchelys maoriomm and O. campbellensis are expected to be endemic to the New Zealand Plateau and perhaps Lord Howe Rise.
- Full Text:
- Date Issued: 1990-07
- Authors: Anderson, M Eric , J.L.B. Smith Institute of Ichthyology
- Date: 1990-07
- Subjects: Zoarcidae , Fishes -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/70348 , vital:29647 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
- Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 50 , The eelpout fauna of the southwestern Pacific presently includes 6 species, one of which, Pachycara garricki, is described as new. Full species accounts and illustrations are also provided for Melanostigma inexpectatum, Ophthalmolycus campbellensis, and Lycenchelys maoriorum, known previously only from the meager type series. Two species, Melanostigma gelatinosum, and M. vitiazi were redescribed in the first part of this series, but expanded diagnoses are provided here. Lycenchelys maoriomm and O. campbellensis are expected to be endemic to the New Zealand Plateau and perhaps Lord Howe Rise.
- Full Text:
- Date Issued: 1990-07
Participating in the UN Decade of Education for Sustainability: voices in a southern African consultation process
- Authors: Lotz-Sisitka, Heila
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67367 , vital:29081 , https://www.ajol.info/index.php/sajee/article/view/122720
- Description: publisher version , This paper documents the outcomes of the consultation process on participating in the UNDESD which was led by the SADC Regional Environmental Education Programme in 2005/2006, assisted by the Rhodes University Environmental Education and Sustainability Unit and Environment Africa. The goals of the consultation process were to explore interpretations and meaning-making around the global discourse of ESD in a southern African context. Findings from the consultation process provide useful baseline information on the status of debate on sustainable development in educational circles; participation and partnerships; insights into environmental and sustainability education (ESD) practice and mechanisms needed for supporting this practice. The paper ends by outlining a research agenda for ESD in southern Africa, as discussed during the consultation process.
- Full Text:
- Date Issued: 2006
- Authors: Lotz-Sisitka, Heila
- Date: 2006
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/67367 , vital:29081 , https://www.ajol.info/index.php/sajee/article/view/122720
- Description: publisher version , This paper documents the outcomes of the consultation process on participating in the UNDESD which was led by the SADC Regional Environmental Education Programme in 2005/2006, assisted by the Rhodes University Environmental Education and Sustainability Unit and Environment Africa. The goals of the consultation process were to explore interpretations and meaning-making around the global discourse of ESD in a southern African context. Findings from the consultation process provide useful baseline information on the status of debate on sustainable development in educational circles; participation and partnerships; insights into environmental and sustainability education (ESD) practice and mechanisms needed for supporting this practice. The paper ends by outlining a research agenda for ESD in southern Africa, as discussed during the consultation process.
- Full Text:
- Date Issued: 2006
An exploratory study of Heads of Departments' responses to student calls for decolonised higher education
- Grant, Carolyn, Quinn, Lynn, Vorster, Jo-Anne E
- Authors: Grant, Carolyn , Quinn, Lynn , Vorster, Jo-Anne E
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123420 , vital:35436 , https://doi.org/10.17159/2520-9868/i72a05
- Description: Central to the tumultuous student protests of 2015 and 2016 was an urgent call for the decolonisation of South African universities. Existing curricula, including teaching and assessment practices, as well as institutional cultures and structures were challenged. Against this backdrop, in this article we focus on the academic leadership role of Heads of Departments (HoDs) at Rhodes University. In this small-scale project we interrogate how HoDs conceptualised their roles in this uncertain and complex context. From the data analysis a number of tensions emerged in the ways in which they articulated and enacted their roles. The findings indicate that the protests have contributed to the increasing complexity of the role of an HoD. Issues raised during the protests catalysed HoDs at Rhodes University, some for the first time, into considering the implications of the decolonising call from students and into exercising stronger transformative leadership roles.
- Full Text:
- Date Issued: 2018
- Authors: Grant, Carolyn , Quinn, Lynn , Vorster, Jo-Anne E
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/123420 , vital:35436 , https://doi.org/10.17159/2520-9868/i72a05
- Description: Central to the tumultuous student protests of 2015 and 2016 was an urgent call for the decolonisation of South African universities. Existing curricula, including teaching and assessment practices, as well as institutional cultures and structures were challenged. Against this backdrop, in this article we focus on the academic leadership role of Heads of Departments (HoDs) at Rhodes University. In this small-scale project we interrogate how HoDs conceptualised their roles in this uncertain and complex context. From the data analysis a number of tensions emerged in the ways in which they articulated and enacted their roles. The findings indicate that the protests have contributed to the increasing complexity of the role of an HoD. Issues raised during the protests catalysed HoDs at Rhodes University, some for the first time, into considering the implications of the decolonising call from students and into exercising stronger transformative leadership roles.
- Full Text:
- Date Issued: 2018
Electoral systems: critical survey
- Authors: Asmal, Kader, 1934-2011
- Date: 1990-10-24
- Subjects: Elections -- South Africa , Election law -- South Africa , Voting -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/66455 , vital:28951 , ISBN 1868080498
- Description: Ever since union - and before - black South Africans have been excluded from parliament, provincial councils and other law-making bodies. This means that blacks have never participated in the electoral process. The voting (electoral) system - its nature and workings - remained the sole preserve of white political parties and the Apartheid government of the day. As a result of a conjuncture of circumstances (as per Harare Declaration), the African National Congress and the apart0heid government are now engaged in talks. Hopefully this will ultimately lead to negotiations towards a new Constitution which will make provision for a single unitary, non-racial, non-sexist South Africa with universal franchise on one single common voters roll and one person one vote. Part of the process of constitution-making for such a South Africa, will be the working out of a system of voting, an electoral system, which would be appropriate for the country. The African National Congress has recognised the need for a multi-party system, the right of all other political forces and organisations to organise and to compete for power on the political terrain. The ANC also recognises that all parties enjoying significant support should have the right to be represented in a Constituent Assembly and parliament. The question which needs to be resolved is: What would be an appropriate electoral system to achieve the stated objec0tive? It is to place the issue before the people of our country and to ensure participation at the widest levels by all the organisa0tions of the people in the process of constitution-making (including formulating and/or agreeing upon an acceptable system of voting), that the African National Congress, Community Law Centre (University of the Western Cape) and the Centre for Development Studies have organised a conference to be held in the Western Cape on 2 - 4 NOVEM0BER 1990. This conference will not be a decision-making one. nor will there be any resolutions at the end of the conference. The objective is to facilitate meaningful discussions throughout the country. To facilitate this process, we present a discussion document entitled "ELECTORAL SYSTEMS: A CRITICAL SURVEY" which has been prepared by Professor KADER ASMAL, a member of the Constitutional Committee of the ANC and Professor of Law at Trinity College, Dublin. It is hoped that arising from these discussions, there will be more meaningful discussions and consultations amongst or0ganisations such as trade unions, civic organisations, women’s organisations and other sectoral or0ganisations - ultimately leading to a situation which we would be better able to decide on an acceptable, unity building and democratic electoral system. , "The Community Law Centre (UWC) & Centre for Development Studies in conjunction with the ANC Constitutional Committee."--Cover
- Full Text:
- Date Issued: 1990-10-24
- Authors: Asmal, Kader, 1934-2011
- Date: 1990-10-24
- Subjects: Elections -- South Africa , Election law -- South Africa , Voting -- South Africa
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/66455 , vital:28951 , ISBN 1868080498
- Description: Ever since union - and before - black South Africans have been excluded from parliament, provincial councils and other law-making bodies. This means that blacks have never participated in the electoral process. The voting (electoral) system - its nature and workings - remained the sole preserve of white political parties and the Apartheid government of the day. As a result of a conjuncture of circumstances (as per Harare Declaration), the African National Congress and the apart0heid government are now engaged in talks. Hopefully this will ultimately lead to negotiations towards a new Constitution which will make provision for a single unitary, non-racial, non-sexist South Africa with universal franchise on one single common voters roll and one person one vote. Part of the process of constitution-making for such a South Africa, will be the working out of a system of voting, an electoral system, which would be appropriate for the country. The African National Congress has recognised the need for a multi-party system, the right of all other political forces and organisations to organise and to compete for power on the political terrain. The ANC also recognises that all parties enjoying significant support should have the right to be represented in a Constituent Assembly and parliament. The question which needs to be resolved is: What would be an appropriate electoral system to achieve the stated objec0tive? It is to place the issue before the people of our country and to ensure participation at the widest levels by all the organisa0tions of the people in the process of constitution-making (including formulating and/or agreeing upon an acceptable system of voting), that the African National Congress, Community Law Centre (University of the Western Cape) and the Centre for Development Studies have organised a conference to be held in the Western Cape on 2 - 4 NOVEM0BER 1990. This conference will not be a decision-making one. nor will there be any resolutions at the end of the conference. The objective is to facilitate meaningful discussions throughout the country. To facilitate this process, we present a discussion document entitled "ELECTORAL SYSTEMS: A CRITICAL SURVEY" which has been prepared by Professor KADER ASMAL, a member of the Constitutional Committee of the ANC and Professor of Law at Trinity College, Dublin. It is hoped that arising from these discussions, there will be more meaningful discussions and consultations amongst or0ganisations such as trade unions, civic organisations, women’s organisations and other sectoral or0ganisations - ultimately leading to a situation which we would be better able to decide on an acceptable, unity building and democratic electoral system. , "The Community Law Centre (UWC) & Centre for Development Studies in conjunction with the ANC Constitutional Committee."--Cover
- Full Text:
- Date Issued: 1990-10-24
Demarcation of municipalities and service delivery capacity: a case of selected eastern cape municipalities
- Authors: Sokopo, Johannes
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54574 , vital:46715
- Description: The study examines the relationship between demarcation of municipal boundaries and the capacity of a municipality to deliver services. The case of the amalgamation of Baviaans, Camdeboo, and Ikwezi local municipalities which has led to the establishment of the Dr Beyers Naudè Municipality in the Sara Baartman District Municipality in the Eastern Cape has been used to determine this relationship in this study. The amalgamation of these municipalities has led to the redetermination and dismantling of their boundaries and the establishment of the boundaries of the newly created and larger Dr Beyers Naudè Local Municipality. The study investigated whether the demarcation of municipal boundaries has, in this instance, enhanced the capacity of the municipality to deliver basic services. Organisational Theory was used to interpret the amalgamation of municipalities. This theory was used for the theoretical basis of organisational structure and highlighting the need for the alignment of organizational structure with the municipalities’ mandate, of effective and efficient service delivery. The study adopted a qualitative research method and employed a non-probability purposive sampling technique to select participants. Interviews were used for data collection. 38 participants were interviewed, namely 7 councillors, 5 municipal officials, 5 members of the ratepayers’ association and 21 members of the community. Mixed views were expressed by participants regarding the enhancement of the state on basic service delivery after the merger of the three local municipalities. Furthermore, the study did not find evidence of a feasibility study prior to the implementation of the amalgamation process. Subsequently, the study could not find conclusive evidence relating to the enhancement of the capacity of the municipality to deliver services after the redetermination of municipal boundaries. The study recommends, among others, that the demarcation of municipal boundaries should be preceded by an appropriate feasibility study and be done such that there is compliance with the relevant legislation, and it must also have an effective public participation. The study also recommends that the newly established Dr Beyers Naudè Local Municipality should focus on maintaining the service delivery infrastructure it has inherited from the merger of its three predecessor municipalities, enhance public participation in its programmes, and priorities community beneficiation as a critical aspect of its service delivery mandate. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Sokopo, Johannes
- Date: 2021-12
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/54574 , vital:46715
- Description: The study examines the relationship between demarcation of municipal boundaries and the capacity of a municipality to deliver services. The case of the amalgamation of Baviaans, Camdeboo, and Ikwezi local municipalities which has led to the establishment of the Dr Beyers Naudè Municipality in the Sara Baartman District Municipality in the Eastern Cape has been used to determine this relationship in this study. The amalgamation of these municipalities has led to the redetermination and dismantling of their boundaries and the establishment of the boundaries of the newly created and larger Dr Beyers Naudè Local Municipality. The study investigated whether the demarcation of municipal boundaries has, in this instance, enhanced the capacity of the municipality to deliver basic services. Organisational Theory was used to interpret the amalgamation of municipalities. This theory was used for the theoretical basis of organisational structure and highlighting the need for the alignment of organizational structure with the municipalities’ mandate, of effective and efficient service delivery. The study adopted a qualitative research method and employed a non-probability purposive sampling technique to select participants. Interviews were used for data collection. 38 participants were interviewed, namely 7 councillors, 5 municipal officials, 5 members of the ratepayers’ association and 21 members of the community. Mixed views were expressed by participants regarding the enhancement of the state on basic service delivery after the merger of the three local municipalities. Furthermore, the study did not find evidence of a feasibility study prior to the implementation of the amalgamation process. Subsequently, the study could not find conclusive evidence relating to the enhancement of the capacity of the municipality to deliver services after the redetermination of municipal boundaries. The study recommends, among others, that the demarcation of municipal boundaries should be preceded by an appropriate feasibility study and be done such that there is compliance with the relevant legislation, and it must also have an effective public participation. The study also recommends that the newly established Dr Beyers Naudè Local Municipality should focus on maintaining the service delivery infrastructure it has inherited from the merger of its three predecessor municipalities, enhance public participation in its programmes, and priorities community beneficiation as a critical aspect of its service delivery mandate. , Thesis (PhD) -- Faculty of Humanities, School of Governmental and Social Sciences, 2021
- Full Text:
- Date Issued: 2021-12
Secrets, lies and redemption:
- Boshoff, Priscilla A, Prinsloo, Jeanne
- Authors: Boshoff, Priscilla A , Prinsloo, Jeanne
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143381 , vital:38241 , DOI: 10.1080/00020184.2017.1285671
- Description: Confession is a central disciplining technology deployed in the second series of Intersexions, a popular South African TV series that seeks to change sexual and social behaviours that contribute to the risk of HIV infection. The article considers the ‘edu’ part of this edutainment programme, specifically with the nature of the lessons and with the form of ‘disciplining’ the narratives presuppose for gendered and sexual subjects. Central to this critical and constructivist exploration of the gender relationships that are validated and expurgated are Foucault’s notions of discourse and confession as a technology of self. We argue that the series presents a range of different gendered and sexual subjectivities but implicitly endorses a modern subjectivity and transformation at the level of the individual.
- Full Text:
- Date Issued: 2017
- Authors: Boshoff, Priscilla A , Prinsloo, Jeanne
- Date: 2017
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143381 , vital:38241 , DOI: 10.1080/00020184.2017.1285671
- Description: Confession is a central disciplining technology deployed in the second series of Intersexions, a popular South African TV series that seeks to change sexual and social behaviours that contribute to the risk of HIV infection. The article considers the ‘edu’ part of this edutainment programme, specifically with the nature of the lessons and with the form of ‘disciplining’ the narratives presuppose for gendered and sexual subjects. Central to this critical and constructivist exploration of the gender relationships that are validated and expurgated are Foucault’s notions of discourse and confession as a technology of self. We argue that the series presents a range of different gendered and sexual subjectivities but implicitly endorses a modern subjectivity and transformation at the level of the individual.
- Full Text:
- Date Issued: 2017
Rhodes University Graduation Ceremony 1960
- Authors: Rhodes University
- Date: 1960
- Language: English
- Type: text
- Identifier: vital:8094 , http://hdl.handle.net/10962/d1004409
- Description: Rhodes University Graduation Ceremonies in the University Great Hall on Saturday, 2nd April, 1960, at 11 a.m. [and] 23rd April, 1960, at 11 a.m.
- Full Text:
- Date Issued: 1960
- Authors: Rhodes University
- Date: 1960
- Language: English
- Type: text
- Identifier: vital:8094 , http://hdl.handle.net/10962/d1004409
- Description: Rhodes University Graduation Ceremonies in the University Great Hall on Saturday, 2nd April, 1960, at 11 a.m. [and] 23rd April, 1960, at 11 a.m.
- Full Text:
- Date Issued: 1960
Dangerous people and places : a community newspaper's constructions of crime
- Authors: Raymond, Leigh Alice
- Date: 2014
- Subjects: Grocott's Mail (Grahamstown, South Africa) , Community newspapers -- South Africa -- Grahamstown , Crime and the press -- South Africa -- Grahamstown , Newspapers -- Objectivity , Mass media policy -- South Africa -- Grahamstown , Social responsibility of business -- South Africa -- Grahamstown , Police and the press -- South Africa -- Grahamstown
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:3527 , http://hdl.handle.net/10962/d1013091
- Description: This thesis argues that there is a clear imbalance in the representation of crime in the newspaper, Grocott’s Mail, in Grahamstown, in the Eastern Cape of South Africa. The thesis concludes that the system of marginalisation and segregation which was established during the apartheid era is the foundation for the continued segregation and marginalisation of certain groups of people in Grahamstown as depicted in crime journalism. Previous research shows that not only people, but spaces are marginalised through media representations of crime. As people are represented as dangerous, so too the spaces they occupy become dangerous spaces. Importantly, the research shows that discourses of marginalisation are present in newspaper reports reproducing the discourses prominent in society, and in turn, the newspaper itself perpetuates these marginalising discourses. This extends into the coverage that different crimes receive in newspapers. For instance, the reports show that a middle-class audience will be more concerned with property crime in middle-class neighbourhoods, than other crimes in lower-class neighbourhoods. I argue that not only the type of crime, but the severity, the effect, and the necessity for justice represented by the newspaper, are all largely determined by the region of the crime. Further, I show that the criminal is not only demonised and represented as individually deviant in the reports in the newspaper, but that these representations are made by this newspaper because they are deeply imbedded as a discourse in society. This is partly because this newspaper has taken on a monitorial role, requiring neutral reporting from journalists, and a dedication to surveying the processes of state institutions, like the police and courts. As a result, the ways in which crime is reported on in the newspaper is fairly well fixed, making it difficult for journalists to conceive of different ways of reporting crime. The representations of the criminal justice system that the monitorial media, this newspaper included present, are a careful balance between the interest of the public, and the need to preserve relationships with sources. The monitorial media in general, and this newspaper in particular, represent the criminal justice system. The relationship between the police and the newspaper, and the courts and the media, therefore strongly influences the way in which crime news is reported. In particular, crime news is represented from the perspective of the criminal justice system. This research was carried out using Critical Discourse Analysis, qualitative interviews, and focus group interviews.
- Full Text:
- Date Issued: 2014
- Authors: Raymond, Leigh Alice
- Date: 2014
- Subjects: Grocott's Mail (Grahamstown, South Africa) , Community newspapers -- South Africa -- Grahamstown , Crime and the press -- South Africa -- Grahamstown , Newspapers -- Objectivity , Mass media policy -- South Africa -- Grahamstown , Social responsibility of business -- South Africa -- Grahamstown , Police and the press -- South Africa -- Grahamstown
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:3527 , http://hdl.handle.net/10962/d1013091
- Description: This thesis argues that there is a clear imbalance in the representation of crime in the newspaper, Grocott’s Mail, in Grahamstown, in the Eastern Cape of South Africa. The thesis concludes that the system of marginalisation and segregation which was established during the apartheid era is the foundation for the continued segregation and marginalisation of certain groups of people in Grahamstown as depicted in crime journalism. Previous research shows that not only people, but spaces are marginalised through media representations of crime. As people are represented as dangerous, so too the spaces they occupy become dangerous spaces. Importantly, the research shows that discourses of marginalisation are present in newspaper reports reproducing the discourses prominent in society, and in turn, the newspaper itself perpetuates these marginalising discourses. This extends into the coverage that different crimes receive in newspapers. For instance, the reports show that a middle-class audience will be more concerned with property crime in middle-class neighbourhoods, than other crimes in lower-class neighbourhoods. I argue that not only the type of crime, but the severity, the effect, and the necessity for justice represented by the newspaper, are all largely determined by the region of the crime. Further, I show that the criminal is not only demonised and represented as individually deviant in the reports in the newspaper, but that these representations are made by this newspaper because they are deeply imbedded as a discourse in society. This is partly because this newspaper has taken on a monitorial role, requiring neutral reporting from journalists, and a dedication to surveying the processes of state institutions, like the police and courts. As a result, the ways in which crime is reported on in the newspaper is fairly well fixed, making it difficult for journalists to conceive of different ways of reporting crime. The representations of the criminal justice system that the monitorial media, this newspaper included present, are a careful balance between the interest of the public, and the need to preserve relationships with sources. The monitorial media in general, and this newspaper in particular, represent the criminal justice system. The relationship between the police and the newspaper, and the courts and the media, therefore strongly influences the way in which crime news is reported. In particular, crime news is represented from the perspective of the criminal justice system. This research was carried out using Critical Discourse Analysis, qualitative interviews, and focus group interviews.
- Full Text:
- Date Issued: 2014
A business model framework for mission-driven organisations
- Authors: Thackeray, Sean Robin
- Date: 2023-03-31
- Subjects: Nonprofit organizations South Africa Makhanda , Business model , Sustainable development South Africa Makhanda , Resource-based view , Social responsibility of business South Africa Makhanda
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/419123 , vital:71618
- Description: Non-profit organisations (NPOs) contribute to our society by addressing needs through value-creation activities which are normally not addressed by normal for-profit organisations. These NPOs generate their income through donations, fundraising and market activities such as the sale of products or services. However, in the pursuit of organisational sustainability, these NPOs need to ensure that their income meets their expenditure needs over the long run, to allow continuous value creation and to pursue their mission. An organisation’s business model can be visualised through a business model framework (BMF), which have been illustrated to be useful tools for organisations to test new business models, plan and coordinate activities, and to communicate how an organisations business model works to stakeholders. The use of BMFs by NPOs may be useful for similar purposes. However, a key challenge for NPOs and their management is adapting for-profit tools to be more applicable to the NPO environment. Whilst there has been some progress within the literature on adapting these for-profit business model tools to NPOs, this area of research is relatively underrepresented in the literature. The single case study method, exploratory in nature, following a deductive approach with a theoretical framework was used to evaluate the NPO Business model framework for NPOs with multiple income streams (Sanderse, 2014) appropriateness for the Centre for Biological Control (CBC), a mission-driven research organisation located within Rhodes University. The study made use of an interpretivist paradigm through the lens of resource-based theory. The contextual environment of the CBC was similar to other NPOs in that their organisational sustainability was at risk due to uncertainty about the availability of long-term funding. The CBC is actively diversifying their income streams by establishing new partnerships, which increase the capacity and resource base of the organisation to improve its flexibility in meeting current and potential funders’ needs. The NPO Business model framework for NPOs with multiple income streams was found to be a suitable BMF to visualise the holistic operations of the CBC. However, the role of governance-related matters being represented in this BMF was found to be lacking. An amended framework including governance as part of the Business model framework for NPOs with multiple income streams was developed. This improved the BMF, by allowing for further contextual insight into the CBCs business model as governance played a major role in the key activities and income-generating strategies they participate in. The role a BMF has in assisting an organisation with resource management activities was also explored. A suitable BMF, which allows for a holistic and explicit display of an organisation’s business model, would assist in determining how resources could be better managed or orchestrated to pursue different potential income-generating strategies or improve the efficiency of how resources are used in the current business model. This study contributed to business model theory by further testing the Business model framework for NPOs with multiple income streams as a tool to visualise an NPOs business model and identifying that once the governance block was added, this BMF became more suitable within the CBCs context. A minor contribution to resource based theory was the exploration of the potential roles BMFs play in resource management, which should be further investigated in line with additional research questions proposed. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2023
- Full Text:
- Date Issued: 2023-03-31
- Authors: Thackeray, Sean Robin
- Date: 2023-03-31
- Subjects: Nonprofit organizations South Africa Makhanda , Business model , Sustainable development South Africa Makhanda , Resource-based view , Social responsibility of business South Africa Makhanda
- Language: English
- Type: Academic theses , Master's theses , text
- Identifier: http://hdl.handle.net/10962/419123 , vital:71618
- Description: Non-profit organisations (NPOs) contribute to our society by addressing needs through value-creation activities which are normally not addressed by normal for-profit organisations. These NPOs generate their income through donations, fundraising and market activities such as the sale of products or services. However, in the pursuit of organisational sustainability, these NPOs need to ensure that their income meets their expenditure needs over the long run, to allow continuous value creation and to pursue their mission. An organisation’s business model can be visualised through a business model framework (BMF), which have been illustrated to be useful tools for organisations to test new business models, plan and coordinate activities, and to communicate how an organisations business model works to stakeholders. The use of BMFs by NPOs may be useful for similar purposes. However, a key challenge for NPOs and their management is adapting for-profit tools to be more applicable to the NPO environment. Whilst there has been some progress within the literature on adapting these for-profit business model tools to NPOs, this area of research is relatively underrepresented in the literature. The single case study method, exploratory in nature, following a deductive approach with a theoretical framework was used to evaluate the NPO Business model framework for NPOs with multiple income streams (Sanderse, 2014) appropriateness for the Centre for Biological Control (CBC), a mission-driven research organisation located within Rhodes University. The study made use of an interpretivist paradigm through the lens of resource-based theory. The contextual environment of the CBC was similar to other NPOs in that their organisational sustainability was at risk due to uncertainty about the availability of long-term funding. The CBC is actively diversifying their income streams by establishing new partnerships, which increase the capacity and resource base of the organisation to improve its flexibility in meeting current and potential funders’ needs. The NPO Business model framework for NPOs with multiple income streams was found to be a suitable BMF to visualise the holistic operations of the CBC. However, the role of governance-related matters being represented in this BMF was found to be lacking. An amended framework including governance as part of the Business model framework for NPOs with multiple income streams was developed. This improved the BMF, by allowing for further contextual insight into the CBCs business model as governance played a major role in the key activities and income-generating strategies they participate in. The role a BMF has in assisting an organisation with resource management activities was also explored. A suitable BMF, which allows for a holistic and explicit display of an organisation’s business model, would assist in determining how resources could be better managed or orchestrated to pursue different potential income-generating strategies or improve the efficiency of how resources are used in the current business model. This study contributed to business model theory by further testing the Business model framework for NPOs with multiple income streams as a tool to visualise an NPOs business model and identifying that once the governance block was added, this BMF became more suitable within the CBCs context. A minor contribution to resource based theory was the exploration of the potential roles BMFs play in resource management, which should be further investigated in line with additional research questions proposed. , Thesis (MBA) -- Faculty of Commerce, Rhodes Business School, 2023
- Full Text:
- Date Issued: 2023-03-31
Creating the Ideal Push-Pull System for Electrocatalysis A Comparative Study on Symmetrical and Asymmetrical Cardanol-based Cobalt Phthalocyanines
- Nkhahle, Reitumetse, Nyokong, Tebello
- Authors: Nkhahle, Reitumetse , Nyokong, Tebello
- Date: 2021
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/${Handle} , vital:44452 , xlink:href="https://doi.org/10.1002/elan.202060019"
- Description: A symmetrical cardanol-based cobalt phthalocyanine (Pc) along with its asymmetrical acid-based derivatives were synthesized and applied in the electrocatalysis of hydrazine. Despite the inhibition of electron movement by the bulky cardanol-based substituent throughout the series of molecules, an ideal combination of substituents was established in GCE-3 (2,9,16-tris(3- pentadecylphenoxy)-23-mono propionic acid phthalocyanato cobalt (II)) where a limit of detection (LoD) value of 5.10 μM (signal to noise ratio=5) was recorded for the detection of hydrazine. The results obtained serve as an illustration that the combination of electron-donating and electron-withdrawing substituents has a significant influence on the complete functioning of the phthalocyanine molecule(s) being investigated.
- Full Text:
- Date Issued: 2021
- Authors: Nkhahle, Reitumetse , Nyokong, Tebello
- Date: 2021
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/${Handle} , vital:44452 , xlink:href="https://doi.org/10.1002/elan.202060019"
- Description: A symmetrical cardanol-based cobalt phthalocyanine (Pc) along with its asymmetrical acid-based derivatives were synthesized and applied in the electrocatalysis of hydrazine. Despite the inhibition of electron movement by the bulky cardanol-based substituent throughout the series of molecules, an ideal combination of substituents was established in GCE-3 (2,9,16-tris(3- pentadecylphenoxy)-23-mono propionic acid phthalocyanato cobalt (II)) where a limit of detection (LoD) value of 5.10 μM (signal to noise ratio=5) was recorded for the detection of hydrazine. The results obtained serve as an illustration that the combination of electron-donating and electron-withdrawing substituents has a significant influence on the complete functioning of the phthalocyanine molecule(s) being investigated.
- Full Text:
- Date Issued: 2021
Interaction of nitric oxide with cobalt (II) phthalocyanine
- Vilakazi, Sibulelo L, Nyokong, Tebello
- Authors: Vilakazi, Sibulelo L , Nyokong, Tebello
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/293579 , vital:57100 , xlink:href="https://doi.org/10.1016/S0277-5387(98)00244-7"
- Description: The coordination of nitric oxide (NO) to cobalt(II) phthalocyanine (CoPc) in dimethyl sulphoxide (DMSO) has been studied. CoPc coordinates with NO in a 1:1 ratio, forming a CoPc(NO) species. The IR band observed at 1680 cm−1 is assigned to the coordinated NO. In the presence of excess NO, pseudo first order kinetics were followed. The observed rate constant, kf, was determined to be 15.0±0.3 dm−3 mol−1 s−1 and the equilibrium constant was K=5.4±0.4×104dm3 mol−1. Solution or adsorbed CoPc catalyses the reduction of NO. The products of reduction include NH3 and NH2OH.
- Full Text:
- Date Issued: 1998
- Authors: Vilakazi, Sibulelo L , Nyokong, Tebello
- Date: 1998
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/293579 , vital:57100 , xlink:href="https://doi.org/10.1016/S0277-5387(98)00244-7"
- Description: The coordination of nitric oxide (NO) to cobalt(II) phthalocyanine (CoPc) in dimethyl sulphoxide (DMSO) has been studied. CoPc coordinates with NO in a 1:1 ratio, forming a CoPc(NO) species. The IR band observed at 1680 cm−1 is assigned to the coordinated NO. In the presence of excess NO, pseudo first order kinetics were followed. The observed rate constant, kf, was determined to be 15.0±0.3 dm−3 mol−1 s−1 and the equilibrium constant was K=5.4±0.4×104dm3 mol−1. Solution or adsorbed CoPc catalyses the reduction of NO. The products of reduction include NH3 and NH2OH.
- Full Text:
- Date Issued: 1998
An illustrated booklet for reinforcing community health worker knowledge of tuberculosis and facilitating patient counselling:
- Okeyo, Ida L A, Dowse, Roslind
- Authors: Okeyo, Ida L A , Dowse, Roslind
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156629 , vital:40032 , https://phcfm.org/index.php/phcfm/article/view/1687/2559
- Description: Community health workers (CHWs) have facilitated the move to decentralize tuberculosis (TB) management, but lack access to information appropriate both for personal use and in patient interaction and education. To explore the impact of a pictorial-based TB booklet on reinforcing CHW knowledge and facilitating patient counselling.
- Full Text:
- Date Issued: 2018
- Authors: Okeyo, Ida L A , Dowse, Roslind
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/156629 , vital:40032 , https://phcfm.org/index.php/phcfm/article/view/1687/2559
- Description: Community health workers (CHWs) have facilitated the move to decentralize tuberculosis (TB) management, but lack access to information appropriate both for personal use and in patient interaction and education. To explore the impact of a pictorial-based TB booklet on reinforcing CHW knowledge and facilitating patient counselling.
- Full Text:
- Date Issued: 2018
Design and evaluation of an electrochemical immunosensor for measles serodiagnosis using measles-specific Immunoglobulin G antibodies
- Mashazi, Philani N, Vilakazi, Sibulelo, Nyokong, Tebello
- Authors: Mashazi, Philani N , Vilakazi, Sibulelo , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241705 , vital:50962 , xlink:href="https://doi.org/10.1016/j.talanta.2013.06.036"
- Description: The design of electrochemical immunosensors for the detection of measles-specific antibodies is reported. The measles-antigen modified surface was used as an antibody capture surface. The detection of measles-specific IgG antibodies was accomplished using the voltammetric method and horse-radish peroxidase (HRP) labeled secondary antibody (anti-IgG) as a detecting antibody. The potential applications of the designed immunosensor were evaluated in buffer and serum solutions. The immunosensor exhibited good linearity at concentrations less than 100 ng mL−1 with R2=0.997 and the limit of detection of 6.60 ng mL−1 at 3σ. The potential application of the immunosensor was evaluated in the deliberately infected human and newborn calf serum samples with measles-IgG antibody mimicking real-life samples. The designed electrochemical immunosensor could differentiate between infected and un-infected serum samples as higher catalytic currents were obtained for infected serum samples.
- Full Text:
- Date Issued: 2013
- Authors: Mashazi, Philani N , Vilakazi, Sibulelo , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241705 , vital:50962 , xlink:href="https://doi.org/10.1016/j.talanta.2013.06.036"
- Description: The design of electrochemical immunosensors for the detection of measles-specific antibodies is reported. The measles-antigen modified surface was used as an antibody capture surface. The detection of measles-specific IgG antibodies was accomplished using the voltammetric method and horse-radish peroxidase (HRP) labeled secondary antibody (anti-IgG) as a detecting antibody. The potential applications of the designed immunosensor were evaluated in buffer and serum solutions. The immunosensor exhibited good linearity at concentrations less than 100 ng mL−1 with R2=0.997 and the limit of detection of 6.60 ng mL−1 at 3σ. The potential application of the immunosensor was evaluated in the deliberately infected human and newborn calf serum samples with measles-IgG antibody mimicking real-life samples. The designed electrochemical immunosensor could differentiate between infected and un-infected serum samples as higher catalytic currents were obtained for infected serum samples.
- Full Text:
- Date Issued: 2013
First candidates for γ vibrational bands built on the [505] 11/2− neutron orbital in odd-A Dy isotopes:
- Majola, S N T, Sithole, M A, Mdletshe, L, Hartley, D, Timár, J, Nyakó, B M, Allmond, J M, Bark, R A, Beausang, C, Bianco, L, Bucher, T D, Bvumbi, S P, Carpenter, M P, Chiara, C J, Cooper, N, Cullen, D M, Curien, D, Dinoko, T S, Gall, B J P, Garrett, P E, Greenlees, P T, Hirvonen, J, Jakobsson, U, Jones, P M, Julin, R, Juutinen, S, Ketelhut, S, Keswa, B V, Kondev, F G, Korichi, A, Kulp, W D, Lauritsen, T, Lawrie, E A, Makhathini, L, Masiteng, P L, Maqabuka, B, McCutchan, E A, Miller, D, Miller, S, Minkova, A, Msebi, L, Mthembu, S H, Ndayishmiye, J, Nieminen, P, Ngcobo, P Z, Ntshamgase, S S, Orce, J N, Peura, P, Rahkila, P, Redon, N, Riedinger, L L, Riley, M A, Roux, D G, Ruotsalainen, P, Piot, J, Saren, J, Sharpey-Schafer, J F, Scholey, C, Shirinda, O, Simpson, J, Sorri, J, Stefansecu, I, Stolze, S, Uusitalo, J, Wang, X, Werner, V, Wood, J L, Yu, C-H, Zhu, S, Zimba, G
- Authors: Majola, S N T , Sithole, M A , Mdletshe, L , Hartley, D , Timár, J , Nyakó, B M , Allmond, J M , Bark, R A , Beausang, C , Bianco, L , Bucher, T D , Bvumbi, S P , Carpenter, M P , Chiara, C J , Cooper, N , Cullen, D M , Curien, D , Dinoko, T S , Gall, B J P , Garrett, P E , Greenlees, P T , Hirvonen, J , Jakobsson, U , Jones, P M , Julin, R , Juutinen, S , Ketelhut, S , Keswa, B V , Kondev, F G , Korichi, A , Kulp, W D , Lauritsen, T , Lawrie, E A , Makhathini, L , Masiteng, P L , Maqabuka, B , McCutchan, E A , Miller, D , Miller, S , Minkova, A , Msebi, L , Mthembu, S H , Ndayishmiye, J , Nieminen, P , Ngcobo, P Z , Ntshamgase, S S , Orce, J N , Peura, P , Rahkila, P , Redon, N , Riedinger, L L , Riley, M A , Roux, D G , Ruotsalainen, P , Piot, J , Saren, J , Sharpey-Schafer, J F , Scholey, C , Shirinda, O , Simpson, J , Sorri, J , Stefansecu, I , Stolze, S , Uusitalo, J , Wang, X , Werner, V , Wood, J L , Yu, C-H , Zhu, S , Zimba, G
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148827 , vital:38777 , https://0-journals.aps.org.wam.seals.ac.za/prc/abstract/10.1103/PhysRevC.101.044312
- Description: Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd(α,2n)157Dy and 148Nd(12C,5n)155Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a Kπ=2+γ vibrational band, built on the [505]11/2− neutron orbital, in both odd-A155,157Dy isotopes. The coupling of the first excited K=0+ states or the so-called β vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2− orbital, to produce a Kπ=11/2− band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed.
- Full Text:
- Date Issued: 2020
- Authors: Majola, S N T , Sithole, M A , Mdletshe, L , Hartley, D , Timár, J , Nyakó, B M , Allmond, J M , Bark, R A , Beausang, C , Bianco, L , Bucher, T D , Bvumbi, S P , Carpenter, M P , Chiara, C J , Cooper, N , Cullen, D M , Curien, D , Dinoko, T S , Gall, B J P , Garrett, P E , Greenlees, P T , Hirvonen, J , Jakobsson, U , Jones, P M , Julin, R , Juutinen, S , Ketelhut, S , Keswa, B V , Kondev, F G , Korichi, A , Kulp, W D , Lauritsen, T , Lawrie, E A , Makhathini, L , Masiteng, P L , Maqabuka, B , McCutchan, E A , Miller, D , Miller, S , Minkova, A , Msebi, L , Mthembu, S H , Ndayishmiye, J , Nieminen, P , Ngcobo, P Z , Ntshamgase, S S , Orce, J N , Peura, P , Rahkila, P , Redon, N , Riedinger, L L , Riley, M A , Roux, D G , Ruotsalainen, P , Piot, J , Saren, J , Sharpey-Schafer, J F , Scholey, C , Shirinda, O , Simpson, J , Sorri, J , Stefansecu, I , Stolze, S , Uusitalo, J , Wang, X , Werner, V , Wood, J L , Yu, C-H , Zhu, S , Zimba, G
- Date: 2020
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/148827 , vital:38777 , https://0-journals.aps.org.wam.seals.ac.za/prc/abstract/10.1103/PhysRevC.101.044312
- Description: Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd(α,2n)157Dy and 148Nd(12C,5n)155Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a Kπ=2+γ vibrational band, built on the [505]11/2− neutron orbital, in both odd-A155,157Dy isotopes. The coupling of the first excited K=0+ states or the so-called β vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2− orbital, to produce a Kπ=11/2− band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed.
- Full Text:
- Date Issued: 2020
Fluorescence “turn on” probe for bromide ion using nanoconjugates of glutathione-capped CdTe@ ZnS quantum dots with nickel tetraamino-phthalocyanine
- Adegoke, Oluwasesan, Nyokong, Tebello
- Authors: Adegoke, Oluwasesan , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/190479 , vital:44998 , xlink:href="https://doi.org/10.1016/j.jphotochem.2013.05.013"
- Description: In this paper, three differently sized glutathione (GSH)-capped CdTe@ZnS quantum dots (QDs) have been successfully conjugated to nickel tetraamino-phthalocyanine (NiTAPc) to form different QDs-NiTAPc nanocomplexes. Several techniques such as TEM, FT-IR, time-resolved fluorescence measurement and electronic spectroscopy were employed to characterize the nanocomplex. Bromide ion was chosen as a model anion to test the efficacy of the nanoprobe. The fluorescence of the nanoconjugate was “turned off” upon binding but was progressively “turned on” upon interaction with varying concentrations of bromide ion. Experimental results showed that the quantum size effect of nanocrystal QD determined the overall sensitivity and selectivity of the nanoprobe and followed the order QD563-NiTAPc > QD605-NiTAPc > QD621-NiTAPc. The mechanism of reaction is proposed.
- Full Text:
- Date Issued: 2013
- Authors: Adegoke, Oluwasesan , Nyokong, Tebello
- Date: 2013
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/190479 , vital:44998 , xlink:href="https://doi.org/10.1016/j.jphotochem.2013.05.013"
- Description: In this paper, three differently sized glutathione (GSH)-capped CdTe@ZnS quantum dots (QDs) have been successfully conjugated to nickel tetraamino-phthalocyanine (NiTAPc) to form different QDs-NiTAPc nanocomplexes. Several techniques such as TEM, FT-IR, time-resolved fluorescence measurement and electronic spectroscopy were employed to characterize the nanocomplex. Bromide ion was chosen as a model anion to test the efficacy of the nanoprobe. The fluorescence of the nanoconjugate was “turned off” upon binding but was progressively “turned on” upon interaction with varying concentrations of bromide ion. Experimental results showed that the quantum size effect of nanocrystal QD determined the overall sensitivity and selectivity of the nanoprobe and followed the order QD563-NiTAPc > QD605-NiTAPc > QD621-NiTAPc. The mechanism of reaction is proposed.
- Full Text:
- Date Issued: 2013
Negotiating identity in an online virtual environment
- Authors: Dube, Nompumelelo
- Date: 2011-11
- Subjects: Online Identities , Internet , Personal Information Managenment
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/23883 , vital:61284
- Description: This study investigates ways in which people in an online anonymous virtual environment use language to negotiate and manage their identities. The study is informed by the tenets of social constructionism, a theory that explores the problematic manner in which the self is taken for granted as unchanging (Burr, 1998). One point made by alternative theorists other than social constructionist theorists is the notion of the “essential self”; one tenet of social constructionist theory suggests that the “essential self” of a person remains fluid. The implication is that one ultimately changes as each day passes, for example at the core of one’s personality is an “essential self” that changes with experiences, conflicts and/or age (Tuffin, 2005). From a social constructionist perspective, the self is more fractured and contingent on life’s circumstances. This theory was found to be an appropriate paradigm from which to study anonymous online identities, where individuals were found to create and negotiate certain identities outside of those identities that people often find important to portray to outsiders in the general public. Sixty-seven (67) students from different races participated in this study and online discussions from a course discussion forum, “blackboard”, were monitored. This study found that one’s identity is negotiated in an anonymous virtual environment. Data was collected from these discussions and was analysed using Potter and Wetherell’s (1987) method of discourse analysis. Research findings ultimately found that people use discursive strategies in negotiating and maintaining their identity online, but that distinct racial characteristics were noticeable despite some attempts to mask one’s background. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2011
- Full Text:
- Date Issued: 2011-11
- Authors: Dube, Nompumelelo
- Date: 2011-11
- Subjects: Online Identities , Internet , Personal Information Managenment
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10353/23883 , vital:61284
- Description: This study investigates ways in which people in an online anonymous virtual environment use language to negotiate and manage their identities. The study is informed by the tenets of social constructionism, a theory that explores the problematic manner in which the self is taken for granted as unchanging (Burr, 1998). One point made by alternative theorists other than social constructionist theorists is the notion of the “essential self”; one tenet of social constructionist theory suggests that the “essential self” of a person remains fluid. The implication is that one ultimately changes as each day passes, for example at the core of one’s personality is an “essential self” that changes with experiences, conflicts and/or age (Tuffin, 2005). From a social constructionist perspective, the self is more fractured and contingent on life’s circumstances. This theory was found to be an appropriate paradigm from which to study anonymous online identities, where individuals were found to create and negotiate certain identities outside of those identities that people often find important to portray to outsiders in the general public. Sixty-seven (67) students from different races participated in this study and online discussions from a course discussion forum, “blackboard”, were monitored. This study found that one’s identity is negotiated in an anonymous virtual environment. Data was collected from these discussions and was analysed using Potter and Wetherell’s (1987) method of discourse analysis. Research findings ultimately found that people use discursive strategies in negotiating and maintaining their identity online, but that distinct racial characteristics were noticeable despite some attempts to mask one’s background. , Thesis (MA) -- Faculty of Social Sciences and Humanities, 2011
- Full Text:
- Date Issued: 2011-11
Evaluation of a service-learning elective as an approach to enhancing the pharmacist's role in health promotion in South Africa
- Srinivas, Sunitha C, Wrench, Wendy W
- Authors: Srinivas, Sunitha C , Wrench, Wendy W
- Date: 2012
- Language: English
- Type: text , Article
- Identifier: vital:6443 , http://hdl.handle.net/10962/d1006630
- Description: Background. A service-learning (SL) elective offered to final-year pharmacy students was introduced in 2007. The elective demonstrated a holistic approach to creating opportunities for future pharmacists to understand the current needs and future challenges of the burden of disease in developing countries such as South Africa and to foresee their key roles in health promotion. Methods. The 2007 Sasol National Festival of Science and Technology (SciFest) was chosen as the ideal platform to implement this elective. Evaluation of the elective was carried out in association with the Academic Development Centre using a web-based software tool known as the ADC evaluation assistant (ADCEA). The ADCEA consisted of a ‘question bank’ from which the course facilitators selected nine ranked closed questions as well as two open-ended questions. Results. SciFest participation, in the course of the service-learning elective, was acknowledged by students to have prepared them as responsible citizens to undertake health promotion in the public sector healthcare system. Conclusion. Students’ experiences of the learning opportunities provided in the SciFest elective highlight the strengths of this SL programme.
- Full Text:
- Date Issued: 2012
- Authors: Srinivas, Sunitha C , Wrench, Wendy W
- Date: 2012
- Language: English
- Type: text , Article
- Identifier: vital:6443 , http://hdl.handle.net/10962/d1006630
- Description: Background. A service-learning (SL) elective offered to final-year pharmacy students was introduced in 2007. The elective demonstrated a holistic approach to creating opportunities for future pharmacists to understand the current needs and future challenges of the burden of disease in developing countries such as South Africa and to foresee their key roles in health promotion. Methods. The 2007 Sasol National Festival of Science and Technology (SciFest) was chosen as the ideal platform to implement this elective. Evaluation of the elective was carried out in association with the Academic Development Centre using a web-based software tool known as the ADC evaluation assistant (ADCEA). The ADCEA consisted of a ‘question bank’ from which the course facilitators selected nine ranked closed questions as well as two open-ended questions. Results. SciFest participation, in the course of the service-learning elective, was acknowledged by students to have prepared them as responsible citizens to undertake health promotion in the public sector healthcare system. Conclusion. Students’ experiences of the learning opportunities provided in the SciFest elective highlight the strengths of this SL programme.
- Full Text:
- Date Issued: 2012