List of Titles

Explaining people's perceptions of invasive alien species: A conceptual framework

- Shackleton, Ross T, Richardson, David M, Shackleton, Charlie M, Bennett, Brett, Crowley, Sarah L, Dehnen-Schmutz, Katharina, Estévez, Rodrigo A, Fischer, Anke, Kueffer, Christoph, Kull, Christian, Marchante, Elizabete, Novoa, Ana, Potgieter, Luke J, Vass, Jetske, Vas, Anna S, Larson, Brendon

Authors: Shackleton, Ross T , Richardson, David M , Shackleton, Charlie M , Bennett, Brett , Crowley, Sarah L , Dehnen-Schmutz, Katharina , Estévez, Rodrigo A , Fischer, Anke , Kueffer, Christoph , Kull, Christian , Marchante, Elizabete , Novoa, Ana , Potgieter, Luke J , Vass, Jetske , Vas, Anna S , Larson, Brendon
Date: 2019
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/181356 , vital:43726 , xlink:href="https://doi.org/10.1016/j.jenvman.2018.04.045"
Description: Human perceptions of nature and the environment are increasingly being recognised as important for environmental management and conservation. Understanding people's perceptions is crucial for understanding behaviour and developing effective management strategies to maintain, preserve and improve biodiversity, ecosystem services and human well-being. As an interdisciplinary team, we produced a synthesis of the key factors that influence people's perceptions of invasive alien species, and ordered them in a conceptual framework. In a context of considerable complexity and variation across time and space, we identified six broad-scale dimensions: (1) attributes of the individual perceiving the invasive alien species; (2) characteristics of the invasive alien species itself; (3) effects of the invasion (including negative and positive impacts, i.e. benefits and costs); (4) socio-cultural context; (5) landscape context; and (6) institutional and policy context. A number of underlying and facilitating aspects for each of these six overarching dimensions are also identified and discussed. Synthesising and understanding the main factors that influence people's perceptions is useful to guide future research, to facilitate dialogue and negotiation between actors, and to aid management and policy formulation and governance of invasive alien species. This can help to circumvent and mitigate conflicts, support prioritisation plans, improve stakeholder engagement platforms, and implement control measures.
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Date Issued: 2019

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Educational interventions for primary caregivers related to infection prevention and control in stroke patients in a rural setting of Mutasa district, Zimbabwe

- Chikanya, Violet Kestha

Authors: Chikanya, Violet Kestha
Date: 2022-12
Subjects: Educational interventions -- Zimbabwe , Cross infection -- Prevention -- Zimbabwe , Primary caregivers
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10948/60133 , vital:63146
Description: Infection prevention and control offer safe and effective practices for patients and healthcare workers in any setting, including the home environment. Understanding and applying principles are based on knowledge and training of caregivers. The incidence of stroke has increased significantly in some sub-Saharan countries. Most patients with stroke are admitted into hospital during the acute phase of care, and are then discharged for further care and management at home. Recovery at home after a stroke takes a long time under the care of primary caregivers with either little or no health care training, exposing these patients to a variety of risky infections. Education on infection prevention and control is therefore encouraged to guide primary caregivers in caring for these patients. The study objectives sought to explore and describe knowledge and practices of primary caregivers, and information given by village health workers to primary caregivers to prevent and control chest infections, skin infections and urinary tract infections in home-based stroke patients in a rural setting in Mutasa district, Zimbabwe. The study also sought to develop and validate educational interventions for primary caregivers to prevent and control chest infections, skin infections and urinary tract infections in home-based stroke patients. A quantitative research paradigm was used in the study. Multistage random sampling was used to select 20 wards and 200 villages. Using a margin of error of 5% and 95% confidence, the sample consisted of 200 primary caregivers and 200 village health workers. The study was conducted in three phases. Phase One comprised data collection from primary caregivers and village health workers regarding prevention and control of chest, skin, and urinary tract infections. Data were collected using a structured interviewer-administered questionnaire for primary caregivers and a self-administered questionnaire for village health workers. The research instruments collected data on socio-demographics, knowledge, practices and infection prevention and control information given by village health workers to primary caregivers. The Visual Basic for Applications package was used for data analysis. x The study results revealed that a significant number of primary caregivers had low knowledge levels in terms of stroke and infections that frequently occur in home-based stroke patients. About a third of primary caregivers did not know the standard infection prevention and control measures to prevent infections, and a substantial proportion of the primary caregivers did not practise the recommended measures to prevent and control chest, skin and urinary tract infections in home-based stroke patients. It was found that village health workers provided limited health education on stroke, its complications, and measures to prevent and control chest, skin and urinary tract infections to primary caregivers. In Phase Two, educational interventions in the form of a job aid comprising worksheets for primary caregivers to prevent and control chest, skin and urinary tract infections in home-based stroke patients in a rural setting were developed. In Phase Three, the draft job aid was reviewed by an eight-member expert panel. Feedback from the reviewers was used to develop the final job aid for enhancing the knowledge and practices of primary caregivers in terms of infection prevention and control in home-based stroke patients. Throughout the study, the researcher adhered to ethical considerations, namely respect for persons, beneficence, and justice. The quality of data collected was ensured by applying the principles of validity and reliability in the development stage of the questionnaire and by conducting a pilot study. Rigorous evaluation of the developed job aid is required to establish its validity. It is recommended that the job aid be included in nurse training and continuing education programs. The trainings should be cascaded to the village health workers and primary caregivers of other bed-ridden patients. The job aid will also reach more caregivers if translated to other local languages. , Thesis (PhD) -- Faculty of Health Sciences, 2022
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Date Issued: 2022-12

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Post-conflict reconstruction and development in South Sudan

- Annan, David https://orcid.org/0000-0001-9199-102X

Authors: Annan, David https://orcid.org/0000-0001-9199-102X
Date: 2019-08
Subjects: Peace-building , Conflict management , South Sudan -- Politics and government -- 2011-
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10353/19925 , vital:44486
Description: The primary goal of this study was to identify possibilities for a common ground for reconciliation and restoring law and order through internally driven post-conflict reconstruction and development (PCRD) in South Sudan to prevent the recurrence of violent conflict and to attain peace, socio-economic and sustainable development. The existing literature about PCRD is mainly written by authors, policymakers and scholars who mostly support externally driven interventions and operations of ready-made ‘solutions’ to complex problems in war-torn countries without exploring internally driven approval to solve these conflicts. It is because of the failure of these externally driven approaches and the absence of a common goal for reconciliation that this study has been conceived to explore alternative approaches for reconciliation and post-conflict settlement to restore responsible law and order, build resilient good governance and to build legitimate state institutions in South Sudan. To better understand in-conflict and post-conflict societies and their needs, the study uses a qualitative methodology approach through explorative and interpretative mechanisms to purposely put together face-to-face interviews of people’s opinions on the current civil conflict in South Sudan. The findings indicate that for peace to be restored there is a need for an internally national dialogue and reconciliation and external actors must support locally driven initiation to enable lasting peace to prevail in South Sudan. The research uses cosmopolitan conflict transformation resolution (CCTR) to demonstrate perspective and knowledge of the South Sudanese on peace-building to provide an alternative contribution to efficient intervention in the South Sudan conflict. Without peace there cannot be effective lasting development and without development, it is almost impossible to establish lasting peace. Hence, the study views PCRD more as a sustainable development intervention through an internally driven approach than a market-biased political process to prevent relapse of violent conflict in South Sudan. , Thesis (PhD) -- Faculty of Management and Commerce, 2019
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Date Issued: 2019-08

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Spontaneous charge transfer between zinc tetramethyl-tetra-2, 3-pyridinoporphyrazine and CdTe and ZnS quantum dots

- Moeno, Sharon, Idowu, Mopelola, Nyokong, Tebello

Authors: Moeno, Sharon , Idowu, Mopelola , Nyokong, Tebello
Date: 2008
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/265997 , vital:53908 , xlink:href="https://doi.org/10.1016/j.ica.2008.02.048"
Description: Zinc tetramethyl-tetra-2,3-pyridinoporphyrazine (ZnTmtppa(-2)) gets reduced to the ZnTmtppa(-3) species on interaction with CdTe QDs capped with 2-mercaptoethanol (2-ME) or thioglycolic acid (TGA) and ZnS QDs capped with 2-ME. The interaction occurs without photolysis. The fluorescence of the QDs is quenched by ZnTmtppa resulting in large quenching constants. Binding of ZnTmtppa to QDs occurs with two molecules of the former binding to the latter.
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Date Issued: 2008

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Characterization of self-assembled monolayers of iron and cobalt octaalkylthiosubstituted phthalocyanines and their use in nitrite electrocatalytic oxidation

- Matemadombo, Fungisai, Nyokong, Tebello

Authors: Matemadombo, Fungisai , Nyokong, Tebello
Date: 2007
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/271182 , vital:54519 , xlink:href="https://doi.org/10.1016/j.electacta.2007.05.002"
Description: Cobalt and iron phenylthiosubstituted phthalocyanines have been deposited on Au electrode surfaces through the self-assembled monolayer (SAM) technique. The so formed layers were studied using voltammetric and impedance techniques. These SAMs blocked a number of Faradic processes and electrocatalyzed the oxidation of nitrite. The electrocatalytic parameters of the cobalt and iron phenylthiosubstituted phthalocyanines deposited on Au electrodes in nitrite solution were studied. Nitrite overpotentials which are lower than ever reported were obtained in this work for the iron phenylthiosubstituted phthalocyanines with very high stability.
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Date Issued: 2007

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Assessing public administration implications of the use and disposal of agro-chemicals in A2 farms in Zimbabwe : a case study of Chirumhanzu District

- Matunhu, Viola

Authors: Matunhu, Viola
Date: 2015
Subjects: Agricultural chemicals , Hazardous waste treatment facilities , Pesticide waste
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10353/26481 , vital:65471
Description: This study is concerned with use and disposal of agro-chemical in A2 farms in Zimbabwe with specific reference to Chirumhanzu District. The study is located in the field of public administration. A transformational mixed research design was employed in the collection, analysis and interpretation of the field data. The study involved farm employees in 21 A2 farms that use agro-chemicals to enhance farm productivity. Non probability sampling techniques were employed to select the participating farms. Interviews, questionnaires, literature search, and observation where the main data collection instruments. A total of 150 purposively selected employees drawn from 21 participating farms participated in the study. The findings of this empirical study, which uses the terms I, the researcher, and the study interchangeably, were that there is poor use and management of agro-chemicals in the area. Most farm employees do not adhere to instructions on use and disposal of the chemicals and there is a weak monitoring and evaluation of the use and disposal of agro-chemicals on the farms. Yet, most of these chemicals are carcinogens. Farm employees need to be trained on personal and public health implications of poor management of agro-chemicals. Labels on containers that store chemicals need to be written in both English and vernacular, which is not the case in the district. Labels on most of the chemicals on the farms studied are written in English and technical terms are used. Although, most of the employees on the farms are literate, they find it difficult to understand the jargon on labels. , Thesis (PhD) -- Faculty of Management and Commerce, 2015
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Date Issued: 2015

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An assessment of the role of Education Development (EDO) officers in promoting quality teaching and learning in selected secondary schools in the King Williams Town (KWT) District

- Mbande - Kwayini, Busisiwe Grissel

Authors: Mbande - Kwayini, Busisiwe Grissel
Date: 2022-03
Subjects: Education, Higher--South Africa. , School management and organization--South Africa. , Effective teaching.
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10353/22099 , vital:51983
Description: Globally, concern have been raised against the quality of teaching and learning driven by international institution such as the United Nations Educational, Scientific and Cultural Organization and agenda of the Education for All policy. In South Africa, the QTL in secondary school remains low and compromised despite the implementation of EFA policy and use of EDOs in South Africa generally and King Williams Town (KWT) in particular. The drive of this study is to assess the role played by EDOs in supporting QTL in selected secondary schools in King Williams Town District. The study used a qualitative approach, a case study design was followed and the case in point for this study is EDOs in KWT district. Their roles where assessed between two secondary schools namely Enoch Sontonga high school and Nosizwe high school. Ten (10) interviews using face-to face and telephonic method. The study managed to conduct five face-to-face interviews among EDOs as they were conveniently located during a period of workshops in the circuit and two educators and three principals were interviewed electronically. Purposive and convenience sampling techniques were used to select participants. Using the Popper’s theory of learning perspective the study found out that quality teaching and learning in KWT schools is dependent on factors such as time on task, scope of learning, learning environment, teaching methods and strategies, support and monitoring programmes, the teacher preparedness and their motivation and availability of attractive incentives to retain quality practitioners in their classrooms. The study found out that presently the EDOs are performing various roles such as offering support to the SMT through helping them understand their function within the school and the broader education system and helping in developing systems for monitoring and recording progress made by learners towards achievement of targets set. However, there are challenges encountered by EDOs when supporting schools to improve the QTL that were discussed namely, lack of human resources and material resources; educator resistance; non-academic activities; learner and teacher absenteeism; programmes alignment; and work overload. These challenges can be addressed using strategies such as human resources training and recruitment; programmes coordination and stakeholder cooperation; transport provision; consequence management; attitude change and policy alignment and implementation. The study recommends investment in leadership, Monitoring and evaluation, stakeholder engagement and training. , Thesis (MPA) -- University of Fort Hare, 2022
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Date Issued: 2022-03

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Bicultural voice in three works

- Nkuna, Musa Duke

Authors: Nkuna, Musa Duke
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/10948/54607 , vital:46769
Description: This portfolio of compositions is made up of two parts: Part one is a commentary on the works presented in the portfolio. As required by Nelson Mandela University for the degree of DMus, the commentary is a descriptive narrative, rather than an analysis, of the works. It forms a basic guide for the listener as to how these works were conceived and constructed, and how both African and Western music elements have been used in order to achieve a syncretism. My commentary endeavours to show the compositional techniques applied when writing these works, and how my cultural interactions, music training and experience as a professional opera singer influence my compositional output. Part two contains the creative content of the portfolio: a set of scores of the three works themselves, as well as accompanying recordings of these works, with a total duration of ca. 100 minutes of music. It forms the main part of the submission. , Thesis (DMA) -- Faculty of Humanities, Department of Music and Performing Arts, 2021
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Date Issued: 2021-12

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Mediating transition to household electricity conservation through co-designing in Makhanda, South Africa

- Mutumbi, Uzziah

Authors: Mutumbi, Uzziah
Date: 2022-04-06
Subjects: Households Energy consumption South Africa Makhanda , Renewable energy sources South Africa , Consumer behavior South Africa Makhanda , Energy conservation South Africa Makhanda Citizen participation , Low-income consumers South Africa Makhanda
Language: English
Type: Academic theses , Master's theses , text
Identifier: http://hdl.handle.net/10962/291262 , vital:56838
Description: Households consume up to 20% of total global electricity consumption, hence they are important role players in efforts for promoting sustainable consumption. Research on electricity-use behaviour and effectiveness of interventions is important for informing intervention strategies. However, relative to developed countries, research on this subject is lacking in developing countries, where electricity access is limited, and a substantial proportion of households are energy poor. The main goal of this study was to examine reported electricity-use behaviour and the effects of co-designed interventions on household electricity consumption in low-income households in Makhanda, South Africa, using a field-based experiment. Findings from self-reported electricity-use practices showed mixed results, with households reporting both good electricity-use behaviour (e.g., cooling down hot food before refrigeration) and wasteful actions (e.g., leaving appliances on standby). Results showed that electricity-use behaviour was influenced by socio-psychological values including universalism, benevolence, hedonism, and power. Over the intervention period, households exposed to co-designed electricity-saving interventions showed mean electricity savings of about 5.5%, while households in the Partial Treatment and Control group showed increased electricity consumption. Socio-demographic factors such as age and psychological factors (involvement and perceived behavioural control) were very important determinants of household consumption. Broadly, the findings empirically validate the impact of collective problem formulation and co-designing interventions in promoting sustainable actions. , Thesis (MSc) -- Faculty of Science, Environmental Science, 2022
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Date Issued: 2022-04-06

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Museums for the Planet: Critical Realist Philosophy and the Possibility of an Eco-decolonial Museology

- Jeffery, Thomas Carnegie

Authors: Jeffery, Thomas Carnegie
Date: 2021-10-29
Subjects: Museums Management , Critical realism , Ontology , Decolonization , Organizational change , Social ecology , Eco-decolonial
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10962/192692 , vital:45251 , 10.21504/10962/192692
Description: This study introduces dialectical critical realism into museology as a philosophical underlabourer for the development of new theoretical potentials for the transformation of museum practice. The idea of the museum is in a moment of fluidity evident in emergent decolonial and ecological perspectives and in the International Council of Museum’s process of redefinition of the museum. The potential to reimagine the museum lacks a coherent philosophical and theoretical foundation. The persistence of museological dualism separates the social from the ecological and absents the emergence of relational modes of thinking and practice. This study conceives an ecological-decolonial or eco-decolonial mode of museology that is disruptive of dualism and generative of relationality, and is thus generative of agency for deeper, more effective and enduring social-ecological justice. The core of this thesis is the development of the eco-decolonial mode of museology through the DCR onto-axiological chain or ‘MELD’ schema. At 1M a depth ontological analysis augmented by interviews with key informants establishes a dialectic of society and ecology in the museological context. 1M surfaces capitalism and the implicit neoliberal ontology of museology as deep causal mechanisms of the 2E persistence of museological human-nature dualism. The paradox of ‘emancipatory neoliberalism’ is a policy-practice contradiction that absents potentials for transformation of the museum and that is held in place by the grounding ontological activity of museology, collection. The 2E perspective on absences enables the emergence of new transformative pathways towards the 3L vision of the eco-decolonial mode of museology as a (4D) new way of thinking and working to resolve neoliberal restrictions. The fundamental 4D change envisioned for museum philosophy, theory and practice is an ontological transformation from traditionalist human-nature dualism to a progressive human-nature dialectic. A case study considers instances where museum workers exercised the agency to expand practice in this way. Future work using the expansive learning methodology of Change Laboratories will develop and implement the potentials generated by the onto-axiological chain for the eco-decolonial mode to bring real change to traditional, dualist museum practice, in order to ensure the relevance and the agency of the museum as a social structure in and for a changing world. , Thesis (PhD) -- Faculty of Education, Education, 2021
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Date Issued: 2021-10-29

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Contributions to the study of nonholonomic Riemannian manifolds

- Barrett, Dennis Ian

Authors: Barrett, Dennis Ian
Date: 2017
Subjects: Riemannian manifolds , Curvature , Lie groups , Geometry, Riemannian , Tensor fields
Language: English
Type: Doctoral theses , text
Identifier: http://hdl.handle.net/10962/7554 , vital:21272 , DOI https://doi.org/10.21504/10962/7554
Description: In this thesis we consider nonholonomic Riemannian manifolds, and in particular, left- invariant nonholonomic Riemannian structures on Lie groups. These structures are closely related to mechanical systems with (positive definite) quadratic Lagrangians and nonholo- nomic constraints linear in velocities. In the first chapter, we review basic concepts of non- holonomic Riemannian geometry, including the left-invariant structures. We also examine the class of left-invariant structures with so-called Cartan-Schouten connections. The second chapter investigates the curvature of nonholonomic Riemannian manifolds and the Schouten and Wagner curvature tensors. The Schouten tensor is canonically associated to every non- holonomic Riemannian structure (in particular, we use it to define isometric invariants for structures on three-dimensional manifolds). By contrast, the Wagner tensor is not generally intrinsic, but can be used to characterise flat structures (i.e., those whose associated parallel transport is path-independent). The third chapter considers equivalence of nonholonomic Rie- mannian manifolds, particularly up to nonholonomic isometry. We also introduce the notion of a nonholonomic Riemannian submanifold, and investigate the conditions under which such a submanifold inherits its geometry from the enveloping space. The latter problem involves the concept of a geodesically invariant distribution, and we show it is also related to the curvature. In the last chapter we specialise to three-dimensional nonholonomic Riemannian manifolds. We consider the equivalence of such structures up to nonholonomic isometry and rescaling, and classify the left-invariant structures on the (three-dimensional) simply connected Lie groups. We also characterise the flat structures in three dimensions, and then classify the flat structures on the simply connected Lie groups. Lastly, we consider three typical examples of (left-invariant) nonholonomic Riemannian structures on three-dimensional Lie groups, two of which arise from problems in classical mechanics (viz., the Chaplygin problem and the Suslov problem). , Thesis (PhD) -- Faculty of Science, Mathematics (Pure and Applied), 2017
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Date Issued: 2017

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Effect of nature of nanoparticles on the photophysicochemical properties of asymmetrically substituted Zn phthalocyanines

- Magadla, Aviwe, Oluwole, David O, Britton, Jonathan, Nyokong, Tebello

Authors: Magadla, Aviwe , Oluwole, David O , Britton, Jonathan , Nyokong, Tebello
Date: 2018
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/234539 , vital:50206 , xlink:href="https://doi.org/10.1016/j.ica.2018.06.043"
Description: In this work, low symmetry Zn mono caffeic acid tri-tert butyl (1) and Zn monocarboxyphenoxy tri-(tert-butylphenoxyl) (2) phthalocyanines (Pcs) were covalently linked to amino (using glutathione, GSH, or 3-aminopropyl)triethoxysilane, APTES) functionalised nanoparticles. The nanoparticles are represented as: AgNPs-GSH, SiNPs-APTES, Fe3O4-Ag-SiNPs-APTES and Fe3O4-AgNPs-GSH). The photophysical and photochemical behaviour of the complexes 1 and 2 and their conjugates with nanoparticles were investigated in dimethyl sulfoxide. The conjugates of the Pc complexes with the NPs afforded increase in triplet quantum yields with corresponding decrease in fluorescence quantum yield compared to the Pc complexes alone. The conjugates of 1-AgNPs-GSH, 2-SiNPs-APTES and 2-Fe3O4-Ag-SiNPs-APTES showed higher singlet oxygen quantum yield values as compared to the Pc complexes alone.
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Date Issued: 2018

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Understanding the contribution of Land Use/Cover (LUC) classes on soil erosion and sedimentation using sediment fingerprinting technique and RUSLE in a GIS interface at sub-catchment level

- Taeni, Thembalethu (https://orcid.org/ 0000-0001-7662-8652)

Authors: Taeni, Thembalethu (https://orcid.org/ 0000-0001-7662-8652)
Date: 2021-04
Subjects: Geographic information systems , Soil erosion , River sediments
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10353/20920 , vital:46747
Description: Soil erosion by water is the major source of soil degradation in the world, and South Africa (SA) is not an exception particularly in the Free State (FS) Province. In South Africa, the Caledon River Catchment in the FS Province has been identified as one of the regions where soil erosion has been prevalent for decades. Evidence across many parts of the catchment show a widespread of soil erosion and the contaminant flux associated with sediment into river systems and reservoirs; including the Welbedatcht dam and Carthcart-drift dam in Ladybrand. It is of these issues that the current work aimed at enhancing the understanding of sediment sources and soil erosion dynamics at the Caledon River Basin. The objectives of the study were to locate sources of suspended sediments and to assess and quantify the contribution of Land Use Cover (LUC) classes to water erosion and sediment yield at a sub – catchment level of the Caledon River Basin. To achieve the objectives set out for this research, a study was conducted at a sub - catchment level of the Caledon River Basin in the FS Province, South Africa. The sediment–fingerprinting approach and the Revised Universal Soil Loss Equation (RUSLE) model were used in the study under Geographic Information System (GIS) settings. A qualitative and quantitative interpretation of the geochemical data were used to evaluate the potential for distinguishing catchment sediment sources. The application of multivariate sediment mixing models incorporating Monte Carlo simulations was undertaken to investigate recent variations in sediment sources. Lastly, to document the impact of LUC change on soil erosion; data from soil profile database, Landsat 8 OLI–TIRS and climate (i.e. rainfall) were used to assess and map the spatial and temporal pattern changes of soil erosion at a sub – catchment level as related to LUC changes. In this study, the sub–catchment was classified into 6 LUC classes. Thereafter soil erosion was quantified for three consecutive years namely; 2015, 2016 and 2018 using the soil erosion factors as GIS–layers. The investigation of sediment source types and spatial provenance in the catchment showed that the grassland areas have consistently been the main sediment source (83 percent) throughout the study period. Findings further showed that there was an increase in contributions from cultivation and abandoned cultivated fields. Sediment contribution from surface sources was dominant (54 percent) and thereafter, subsurface sediment input increased (62 percent). This trend is indicative of increased severity of gully erosion in the area and thus is consistent with other studies. To comprehend the influence of LUC class modification dynamics on soil erosion, water erosion in particular at the sub-catchment commencing from 2015 to 2018 (4 years), multi-temporal Landsat 8 information jointly with the RUSLE model were used. A post-classification, LUC class alteration comparison revealed that water bodies, shrubs and forested region and grassland declined by 0.27 percent, 15.60 percent, and 37.60 percent, respectively. On the other hand, regions under Bad lands, and bare-soil and built-up regions including agricultural region expanded by 2.22 percent, 5.78 percent, and 45.67 percent respectively, between 2015 to 2018 study period. The average yearly soil loss decreased at the sub-catchment and was 10.23,5.71 and 5.82 t ⋅ ha -1 ⋅ yr-1 for 2015, 2016 and 2018 respectively. Although soil loss lessened for the duration of the perceived period, a closer scrutiny revealed that there were nonetheless seeming signs of persistent escalation in soil loss risk. These signs were mostly shown in the elevated parts of the sub-catchment as shown by the red regions on the soil loss map. Additional examination of soil loss findings by LUC classes categories further indicated that most LUC classes categories, including Bare-soil and built-up area, agricultural-land, grassland, and region under shrubs and forests, showed increased soil loss levels during the 4 years’ study period at the sub-catchment. The information on the comparative vividness of diverse sediment sources given by the study must be observed as a noteworthy development towards an understanding of the sediment source dynamics in agricultural river based catchments; more so of the Caledon River Basin. Further research is recommended for other erosion prone catchments in South Africa to identify additional evidence of the spatial and temporal variations in soil erosion and sediment sources. The results of the study suggest that the procedure of assimilating the GIS and RS with the RUSLE model is not just precise, time-efficient and exact in recognizing soil erosion susceptible regions in geospatial and temporal standings. However, it is a cost-efficient substitute to standard field-founded approaches. , Thesis (MSc) (Soil Science) -- University of Fort Hare, 2021
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Date Issued: 2021-04

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Photophysics and NLO properties of Ga (III) and In (III) phthalocyaninates bearing diethyleneglycol chains

- Managa, Muthumuni, Khene, Samson M, Britton, Jonathan, Martynov, Alexander G, Gorbunova, Yulia G, Tsivadze, Aslan Y, Nyokong, Tebello

Authors: Managa, Muthumuni , Khene, Samson M , Britton, Jonathan , Martynov, Alexander G , Gorbunova, Yulia G , Tsivadze, Aslan Y , Nyokong, Tebello
Date: 2018
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/237822 , vital:50556 , xlink:href="https://doi.org/10.1142/S1088424618500128"
Description: This work reports on synthesis and characterizations of Ga(III) and In(III) complexes, formed by 2,3-bis[2′′-(2′′′′-hydroxyethoxy)ethoxy]-9,10,16,17,23,24-hexa-nn-butoxy phthalocyanine (1H2) coordinating acetatoindium(III) (1InOAc) and hydroxogallium(III) (1GaOH) Photophysical properties of hydroxogallium(III) phthalocyaninate 1GaOH and acetatoindium(III) phthalocyaninate 1InOAc were studied by UV-vis, fluorescence spectroscopy and time-resolved methods. The nonlinear absorption of the complexes was studied using the Z-scan technique at 532 nm and 10 ns pulse in DMSO and in thin films formed by composite with poly(bisphenol A carbonate) — PBC. The magnitude of absorption coefficients and other nonlinear optical parameters estimated in this work showed that complex 1InOAc exhibited the strongest nonlinear optical behavior in comparison with 1GaOH in solution and a reverse tendency when embedded in PBC thin films. DFT calculations were used to rationalize these results.
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Date Issued: 2018

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Redox reactions of an Mo (V) tetrasulfophthalocyanine

- Ferraudi, Guillermo, Nyokong, Tebello, Feliz, Mario, Perkovic, Marc, Rillema, D Paul

Authors: Ferraudi, Guillermo , Nyokong, Tebello , Feliz, Mario , Perkovic, Marc , Rillema, D Paul
Date: 1994
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/295530 , vital:57351 , xlink:href="https://doi.org/10.1016/0020-1693(93)03664-V"
Description: The preparation of an Mo(V) tetrasulfophthalocyanine and some of its thermal and photochemical reactions have been investigated in this work. Electrochemical processes have been followed by means of the UVVis spectral changes and compared with those observed in flash photolysis. Mo(IV) and Mo(V)-ligand-radical species are common intermediates of the electrochemical and photochemical reactions. In 254 nm irradiations of the Mo(V) tetrasulfophthalocyanine in aqueous solutions of 2-propanol, the macrocycle can be photohydrogenated and the product of the photolysis can be reoxidized with O2 back to the parent complex.
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Date Issued: 1994

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Photophysical properties of a series of alloyed and non-alloyed water-soluble l-cysteine-capped core quantum dots

- Adegoke, Oluwasesan, Nyokong, Tebello, Forbes, Patricia B

Authors: Adegoke, Oluwasesan , Nyokong, Tebello , Forbes, Patricia B
Date: 2017
Subjects: To be catalogued
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/188486 , vital:44758 , xlink:href="https://doi.org/10.1016/j.jallcom.2016.10.276"
Description: Photophysical properties of quantum dots (QDs) such as their photoluminescence (PL) quantum yield (QY), exciton lifetime and PL stability are important parameters used to unravel their chemical and physical characteristics. In this work, we have comparatively investigated the photophysical properties of a series of L-cysteine-capped non-alloyed (CdTe and CdSe) and alloyed (CdZnTe, CdSeS, CdSeTe and CdSeTeS) core QDs. Each of the QDs varied in their size and PL emission wavelength. We observe no physical relationship between the PL QY of the QDs and their PL stability. Based on the PL stability assessment, CdTe QDs with a high PL QY value of 88% exhibited poor PL stability while moderate PL stability was observed for CdZnTe (QY = 78%); CdSe (QY = 3%); and CdSeTe QDs (QY = ∼3%). Alloyed CdSeS (QY = ∼69%) and CdSeTeS (QY = 23%) QDs exhibited good PL stability and can serve as potential fluorophores for a wide range of chemical and biological applications. Generally, it is proposed that the structural nature of the QDs played a significant role in their overall photophysical properties. The information provided in this work will assist in the selection of core QDs suitable for different applications.
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Date Issued: 2017

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An evaluation on the impact of child support grant as a means of poverty alliviation: the case of the Eastern Cape Adelaide Social Development Centre - 2007-2010

- Lombo, Ntombizandile Gail

Authors: Lombo, Ntombizandile Gail
Date: 2015-04
Subjects: Child support--Government policy--South Africa , Economic assistance, Domestic--South Africa--Eastern Cape
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10353/24890 , vital:63668
Description: The purpose of the study was to examine the perceptions of families receiving the Child Support Grant in the area of Adelaide, Eastern Cape and to establish whether or not the Child Support Grant contributes to poverty alleviation. The investigation also went further to find whether people who receive the Child Support Grant are able to meet the needs of their children and the recipients believe that the quality of their lives have improved after receiving the Child Support Grant. Both qualitative and quantitative methods of research were used. Interview schedules that were used were the questionnaires. The findings of the study revealed that the majority of the respondents experienced hardships in terms of employment, education, training and skills development, emotional and financial support. This is a challenge for government and the community at large. Lack of basic facilities such as health care and early child development programmes and social development programmes designed to supplement the grant are all social necessities that they have rights to, according to the Bill of Rights enshrined in the Constitution of 1996. The study also hold a strong view that the government should make an effort on job creation and the community should also make and effort on partaking on self-development projects in order to supplement the Child Support Grant. Teenagers must be encouraged to get educated so that they can get decent jobs and be able to look after their families. , Thesis (MPA) -- Faculty of Management and Commerce, 2015
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Date Issued: 2015-04

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The relevance of sustainable development principles and goals through a case study of Gold Fields and Living Gold

- Ferreira, Adrian

Authors: Ferreira, Adrian
Date: 2007
Subjects: Uncatalogued
Language: English
Type: Master's theses , text
Identifier: http://hdl.handle.net/10962/192977 , vital:45286
Description: The conventional definition of sustainable development as proposed by the Brundtland Report (United Nations, 1987), involving the integration of economic, social and environmental components, is widely accepted. Presumed benefits of these current framework applications tend to perpetuate a business as usual status, with no real sustainable development occurring. The growing debate surrounding this topic makes the case for relevant and contextual inputs to be included into sustainable development objectives. A case study, of Gold Fields and Living Gold, attempts to create a deeper understanding of the components of this debate, and begins to contextualise sustainable development principles, goals and their outcomes. This is carried out though an enquiry of the use of cultural development as a fourth sustainable development category. The case study includes the opinions of a directly affected local community entity (Living Gold) in order to observe the difference between the two organisations (Gold Fields and Living Gold). During the study, the focus began to move away from purely unabated growth impacts and looked to the creation and fostering of resilience and flexibility by the use of adaptive management. In breeding states of resilience, it was recognised that cultural impacts played an important role in ensuring long term systemic resilience. The case study involved assessing the feedback and responses of strategically selected individuals at both organisations, with Gold Fields representing a more western centric entity and Living Gold a formal representation of a traditional/ indigenous community. Similarities and differences were assessed in order to understand how current sustainable development criteria might differ between organisations that have different end objectives in mind, yet are dependent on each other. The findings resulted in a perspective of how culture could be used to describe the qualities of a local community, and how to begin aligning development goals with affected communities. The result was the development of the Integrated Resilience Sustainability Method and the consequent development of the Balanced Bottom Line Framework, which seeks to promote sustainable development along the lines of economic, social, environmental and cultural development. , Thesis (MBA) -- Faculty of Commerce, Rhodes Investec Business School, 2007
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Date Issued: 2007

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