Counting of finite fuzzy subsets with applications to fuzzy recognition and selection strategies
- Authors: Talwanga, Matiki
- Date: 2015
- Subjects: Möbius transformations , Fuzzy sets , Functions, Zeta , Partitions (Mathematics)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5431 , http://hdl.handle.net/10962/d1018186
- Description: The counting of fuzzy subsets of a finite set is of great interest in both practical and theoretical contexts in Mathematics. We have used some counting techniques such as the principle of Inclusion-Exclusion and the Mõbius Inversion to enumerate the fuzzy subsets of a finite set satisfying different conditions. These two techniques are interdependent with the M¨obius inversion generalizing the principle of Inclusion-Exclusion. The enumeration is carried out each time we redefine new conditions on the set. In this study one of our aims is the recognition and identification of fuzzy subsets with same features, characteristics or conditions. To facilitate such a study, we use some ideas such as the Hamming distance, mid-point between two fuzzy subsets and cardinality of fuzzy subsets. Finally we introduce the fuzzy scanner of elements of a finite set. This is used to identify elements and fuzzy subsets of a set. The scanning process of identification and recognition facilitates the choice of entities with specified properties. We develop a procedure of selection under the fuzzy environment. This allows us a framework to resolve conflicting issues in the market place.
- Full Text:
- Date Issued: 2015
- Authors: Talwanga, Matiki
- Date: 2015
- Subjects: Möbius transformations , Fuzzy sets , Functions, Zeta , Partitions (Mathematics)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5431 , http://hdl.handle.net/10962/d1018186
- Description: The counting of fuzzy subsets of a finite set is of great interest in both practical and theoretical contexts in Mathematics. We have used some counting techniques such as the principle of Inclusion-Exclusion and the Mõbius Inversion to enumerate the fuzzy subsets of a finite set satisfying different conditions. These two techniques are interdependent with the M¨obius inversion generalizing the principle of Inclusion-Exclusion. The enumeration is carried out each time we redefine new conditions on the set. In this study one of our aims is the recognition and identification of fuzzy subsets with same features, characteristics or conditions. To facilitate such a study, we use some ideas such as the Hamming distance, mid-point between two fuzzy subsets and cardinality of fuzzy subsets. Finally we introduce the fuzzy scanner of elements of a finite set. This is used to identify elements and fuzzy subsets of a set. The scanning process of identification and recognition facilitates the choice of entities with specified properties. We develop a procedure of selection under the fuzzy environment. This allows us a framework to resolve conflicting issues in the market place.
- Full Text:
- Date Issued: 2015
'Feeling at home': institutional culture and the idea of a university
- Authors: Vice, Samantha
- Date: 2015
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/142072 , vital:38047 , ISBN 9781869142902 , https://books.google.co.za/books?id=49o8rgEACAAJanddq=Being+at+home:+Race,+institutional+culture+and+transformation+at+South+African+higher+education+institutionandhl=enandsa=Xandved=0ahUKEwiPgsa6mpjjAhXNN8AKHbNwAtoQ6AEIKDAA
- Description: This edited work has gathered together contributions on how to transform universities in South Africa; as many are struggling to shift their institutional culture. In a South African context, transformation means to attempt to change higher education institutions such that they no longer reflect the values promoted by apartheid but rather reflect the values embodied in South Africa's 1996 Constitution. Institutional culture is the main subject for discussion in this book. In order to transform South Africa's universities, the contributors begin by analyzing the idea of what a university is, and relatedly, what its ideal aims are. A second theme is to understand what institutional culture is and how it functions. Moreover, transformation cannot occur without transforming the broader cultures of which they are a part. Related to this theme is a general concern about how contemporary moves towards the instrumentalization of higher education affect the ability to transform institutions. These institutions are being pushed to conform to goals that are outside the traditional idea of a university, such as concerns that universities are being 'bureaucratized' and becoming corporations, instead of a place of learning open to all. In conclusion it can be said that the contemporary South African academic community has an opportunity to recreate itself as the end of apartheid created space for engaging in transformative epistemic projects. The transformation of the tertiary sector entails a transformation of institutional cultures.
- Full Text:
- Date Issued: 2015
- Authors: Vice, Samantha
- Date: 2015
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/142072 , vital:38047 , ISBN 9781869142902 , https://books.google.co.za/books?id=49o8rgEACAAJanddq=Being+at+home:+Race,+institutional+culture+and+transformation+at+South+African+higher+education+institutionandhl=enandsa=Xandved=0ahUKEwiPgsa6mpjjAhXNN8AKHbNwAtoQ6AEIKDAA
- Description: This edited work has gathered together contributions on how to transform universities in South Africa; as many are struggling to shift their institutional culture. In a South African context, transformation means to attempt to change higher education institutions such that they no longer reflect the values promoted by apartheid but rather reflect the values embodied in South Africa's 1996 Constitution. Institutional culture is the main subject for discussion in this book. In order to transform South Africa's universities, the contributors begin by analyzing the idea of what a university is, and relatedly, what its ideal aims are. A second theme is to understand what institutional culture is and how it functions. Moreover, transformation cannot occur without transforming the broader cultures of which they are a part. Related to this theme is a general concern about how contemporary moves towards the instrumentalization of higher education affect the ability to transform institutions. These institutions are being pushed to conform to goals that are outside the traditional idea of a university, such as concerns that universities are being 'bureaucratized' and becoming corporations, instead of a place of learning open to all. In conclusion it can be said that the contemporary South African academic community has an opportunity to recreate itself as the end of apartheid created space for engaging in transformative epistemic projects. The transformation of the tertiary sector entails a transformation of institutional cultures.
- Full Text:
- Date Issued: 2015
Poverty reduction strategies in Blue Crane Route Municipality (BCRM)
- Authors: Twenty, Isaac Lungisa
- Date: 2015
- Subjects: Poverty -- Government policy -- South Africa -- Eastern Cape Economic development -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape Community development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/18443 , vital:28646
- Description: The transition period post-apartheid in South Africa since 1994 brought a number of changes in policy making process and the initiated programs by the government in all level with the aim of addressing inequality and poverty reduction strategies. In South Africa prior 1994 division in terms of location access to resources and information was meant for the certain group and participation in the Community development matters. The aim of this research study is to seek and find out the impact of the government policy projects, programme (strategies) in the community to poverty reduction and try to identify the reasons for the failure of other project and to what extend is the capacity building in community members in terms of skill development before the implementation of projects for sustainability and viability of those projects. Also is to explore the community participation or involvement in policy making process such as the formulation of Integrated Development Plan .The study attempts to answer community involvement into their own development, their role and impact to fight poverty and other socio-economic challenges that are faced by the community. The research design for the study could be classified as the mixed design which will include qualitative and quantitative approaches. A sample of 30 participants will be drawn from the community unemployed respondents, project employees, those searching for employment, 5 municipality officials from Blue Crane Route, Ward Councillor and projects leaders. On my findings community participation on community development issues must be strengthen for the sake of development .The issue of centralisation of offices for availability of resources to same of the communities makes it difficult to access resources. Lack of skills and training acquired in the job market for artisans, technical and management skills.
- Full Text:
- Date Issued: 2015
- Authors: Twenty, Isaac Lungisa
- Date: 2015
- Subjects: Poverty -- Government policy -- South Africa -- Eastern Cape Economic development -- South Africa -- Eastern Cape , Rural development -- South Africa -- Eastern Cape Community development -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/18443 , vital:28646
- Description: The transition period post-apartheid in South Africa since 1994 brought a number of changes in policy making process and the initiated programs by the government in all level with the aim of addressing inequality and poverty reduction strategies. In South Africa prior 1994 division in terms of location access to resources and information was meant for the certain group and participation in the Community development matters. The aim of this research study is to seek and find out the impact of the government policy projects, programme (strategies) in the community to poverty reduction and try to identify the reasons for the failure of other project and to what extend is the capacity building in community members in terms of skill development before the implementation of projects for sustainability and viability of those projects. Also is to explore the community participation or involvement in policy making process such as the formulation of Integrated Development Plan .The study attempts to answer community involvement into their own development, their role and impact to fight poverty and other socio-economic challenges that are faced by the community. The research design for the study could be classified as the mixed design which will include qualitative and quantitative approaches. A sample of 30 participants will be drawn from the community unemployed respondents, project employees, those searching for employment, 5 municipality officials from Blue Crane Route, Ward Councillor and projects leaders. On my findings community participation on community development issues must be strengthen for the sake of development .The issue of centralisation of offices for availability of resources to same of the communities makes it difficult to access resources. Lack of skills and training acquired in the job market for artisans, technical and management skills.
- Full Text:
- Date Issued: 2015
Synthesis of single-walled carbon nanotubes by the pyrolysis of a compression activated iron (II) phthalocyanine/phthalocyanine metal-free derivative/ferric acetate mixture
- Mugadza, Tawanda, Antunes, Edith M, Nyokong, Tebello
- Authors: Mugadza, Tawanda , Antunes, Edith M , Nyokong, Tebello
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189729 , vital:44926 , xlink:href="https://doi.org/10.1007/s12039-015-0886-y"
- Description: This paper reports on the synthesis of single walled carbon nanotubes (SWCNTs) from an activated mixture of iron (II) phthalocyanine, its metal-free derivative and ferric acetate. The powdered mixture was activated by compression into a tablet by applying a force of 300 kN, followed by re-grinding into powder and heating it to high temperatures (1000°C). The activation by compression resulted in more than 50% debundling of SWCNTs as judged by transition electron microscopy. Acid functionalization of the SWCNTs was confirmed by the increase in the D:G ratio from 0.56 to 0.87 in the Raman spectra and the observation of an average of one carboxylic acid group per 13 carbon atoms from thermogravimetric analysis (TGA). TGA also showed that the initial decomposition temperatures for the activated and non-activated mixtures to be 205°C and 245°C, respectively. Hence, activation leads to the lowering of the pyrolysis temperature of the phthalocyanines. X-ray diffraction, electronic absorption and Fourier transform infrared spectra were also employed to characterize the SWCNT.
- Full Text:
- Date Issued: 2015
- Authors: Mugadza, Tawanda , Antunes, Edith M , Nyokong, Tebello
- Date: 2015
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/189729 , vital:44926 , xlink:href="https://doi.org/10.1007/s12039-015-0886-y"
- Description: This paper reports on the synthesis of single walled carbon nanotubes (SWCNTs) from an activated mixture of iron (II) phthalocyanine, its metal-free derivative and ferric acetate. The powdered mixture was activated by compression into a tablet by applying a force of 300 kN, followed by re-grinding into powder and heating it to high temperatures (1000°C). The activation by compression resulted in more than 50% debundling of SWCNTs as judged by transition electron microscopy. Acid functionalization of the SWCNTs was confirmed by the increase in the D:G ratio from 0.56 to 0.87 in the Raman spectra and the observation of an average of one carboxylic acid group per 13 carbon atoms from thermogravimetric analysis (TGA). TGA also showed that the initial decomposition temperatures for the activated and non-activated mixtures to be 205°C and 245°C, respectively. Hence, activation leads to the lowering of the pyrolysis temperature of the phthalocyanines. X-ray diffraction, electronic absorption and Fourier transform infrared spectra were also employed to characterize the SWCNT.
- Full Text:
- Date Issued: 2015
Change in Roviana Lagoon Coral Reef ethnobiology:
- Aswani, Shankar, Albert, Simon
- Authors: Aswani, Shankar , Albert, Simon
- Date: 2015
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/145460 , vital:38440 , ISBN 9783319237633 , DOI: 10.1007/978-3-319-23763-3_10
- Description: Coral reefs are iconic for their beauty and biodiversity, and are of great socioeconomic and cultural importance for many coastal communities across the tropics. However, little is known about people’s local classification and their social and ecological relationship with these habitats. This chapter describes Roviana people’s changing ecological and social relationship with their coral reefs, which are increasingly being damaged by humans. First, we combined ecological and social data to describe people’s classification of local coral reefs in tandem with the productive practices conducted in these habitats. Second, we examined local perceptions and recognized effects of environmental and climatic changes on reefs over the last two decades. Finally, we measured changes in fishing activities and in the taxonomic systems (between 1995 and 2011) to evaluate if recent social and economic change has led to the erosion of marine indigenous ecological knowledge and associated practices. Studying people’s changing perceptions of their coral reefs is crucial to understand their ability to identify and adapt to environmental transformations. Simply, the way local people perceive the state of the environment is not only important in terms of changes in local epistemology but also has important implications for how resources are used and managed, and this information can be coupled with scientific one for a broader management strategy.
- Full Text:
- Date Issued: 2015
- Authors: Aswani, Shankar , Albert, Simon
- Date: 2015
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/145460 , vital:38440 , ISBN 9783319237633 , DOI: 10.1007/978-3-319-23763-3_10
- Description: Coral reefs are iconic for their beauty and biodiversity, and are of great socioeconomic and cultural importance for many coastal communities across the tropics. However, little is known about people’s local classification and their social and ecological relationship with these habitats. This chapter describes Roviana people’s changing ecological and social relationship with their coral reefs, which are increasingly being damaged by humans. First, we combined ecological and social data to describe people’s classification of local coral reefs in tandem with the productive practices conducted in these habitats. Second, we examined local perceptions and recognized effects of environmental and climatic changes on reefs over the last two decades. Finally, we measured changes in fishing activities and in the taxonomic systems (between 1995 and 2011) to evaluate if recent social and economic change has led to the erosion of marine indigenous ecological knowledge and associated practices. Studying people’s changing perceptions of their coral reefs is crucial to understand their ability to identify and adapt to environmental transformations. Simply, the way local people perceive the state of the environment is not only important in terms of changes in local epistemology but also has important implications for how resources are used and managed, and this information can be coupled with scientific one for a broader management strategy.
- Full Text:
- Date Issued: 2015
On the characterisation of solar cells using light beam induced current measurements
- Authors: Kwarikunda, Nicholas
- Date: 2015
- Subjects: Solor cells Spectrum, Solar
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/11147 , vital:26889
- Description: The presence of inhomogeneities in semiconductor materials used to fabricate solar cell devices may result in spatial non uniformities in the device properties which may affect current generation in these devices. Besides, current reducing defects such as inclusions, local shunts and optical blockages may be introduced during the various device manufacturing processes which may adversely affect the performance and overall efficiency of solar cells. Diagnostic techniques are therefore needed to identify these defects so as to improve the production technology. This thesis presents the Light Beam Induced Current (LBIC) technique for mapping spatial non uniformities in solar cell devices. The LBIC is a non destructive characterisation technique that uses a focused light beam to raster scan a solar cell surface as the photo-generated current is recorded as a function of position to generate a photo-response map. The technique was used to obtain photoresponse maps for a mc-Si, Back contact Back junction (BC-BJ) silicon solar cell and the InGaP/InGaAs/Ge concentrating triple junction (CTJ) solar cell from which various local current reducing defects were mapped. A reflection signal detector was incorporated into the LBIC measurement system to enable us distinguish between optical blockages on the cell surface and current reducing defects within the solar cell devices. By dynamically biasing the solar cell devices, the electrical activity of the identified defects was investigated and also point-by-point current-voltage (I-V) characteristics were obtained. An interval division algorithm was applied to the measured point-by-point I-V characteristics to extract device and performance parameters from which device and performance parameter uniformity of the devices were mapped. Dark and full cell solar illumination I-V characteristics were also measured to extract device parameters. Analysis of extracted parameters revealed differences between extracted dark and illuminated device parameters which was attributed to departure from the superposition principle due to non-linearity of the semiconductor device equations with respect to carrier concentration. An investigation into the effect of illumination intensity on the I-V parameters of a spot illuminated BC-BJ Si solar cell showed a linear increase and a logarithmic increase of the short circuit current and open circuit voltage respectively with intensity while the series resistance decreased with intensity, which was attributed to increase in conductivity of the active layer. The ideality factor and saturation current were observed to increase while the shunt resistance initially increased before decreasing at higher intensity levels. Under monochromatic illumination, the photo-response of the BC-BJ Si cell was higher at 785nm than at 445nm due to low absorption coefficient of Si for longer wavelength radiations, resulting in carrier generation within the bulk, where there is a higher probability of carriers being collected at the p-n junction before they recombine. Under solar illumination, as the spectral content was altered using long pass colour filters with cut off wavelengths of 610nm and 1000nm, the performance parameters were observed to decrease and this was mainly due to decrease in intensity. For the CTJ solar cell, however, blocking of radiations below 610nm resulted in current mismatch that severely degraded the short circuit current (Isc). The current mismatch affected the extracted device and performance parameters. With a 1000nm long pass filter, a dark I-V was obtained since only the bottom Ge subcell was activated.
- Full Text:
- Date Issued: 2015
- Authors: Kwarikunda, Nicholas
- Date: 2015
- Subjects: Solor cells Spectrum, Solar
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10948/11147 , vital:26889
- Description: The presence of inhomogeneities in semiconductor materials used to fabricate solar cell devices may result in spatial non uniformities in the device properties which may affect current generation in these devices. Besides, current reducing defects such as inclusions, local shunts and optical blockages may be introduced during the various device manufacturing processes which may adversely affect the performance and overall efficiency of solar cells. Diagnostic techniques are therefore needed to identify these defects so as to improve the production technology. This thesis presents the Light Beam Induced Current (LBIC) technique for mapping spatial non uniformities in solar cell devices. The LBIC is a non destructive characterisation technique that uses a focused light beam to raster scan a solar cell surface as the photo-generated current is recorded as a function of position to generate a photo-response map. The technique was used to obtain photoresponse maps for a mc-Si, Back contact Back junction (BC-BJ) silicon solar cell and the InGaP/InGaAs/Ge concentrating triple junction (CTJ) solar cell from which various local current reducing defects were mapped. A reflection signal detector was incorporated into the LBIC measurement system to enable us distinguish between optical blockages on the cell surface and current reducing defects within the solar cell devices. By dynamically biasing the solar cell devices, the electrical activity of the identified defects was investigated and also point-by-point current-voltage (I-V) characteristics were obtained. An interval division algorithm was applied to the measured point-by-point I-V characteristics to extract device and performance parameters from which device and performance parameter uniformity of the devices were mapped. Dark and full cell solar illumination I-V characteristics were also measured to extract device parameters. Analysis of extracted parameters revealed differences between extracted dark and illuminated device parameters which was attributed to departure from the superposition principle due to non-linearity of the semiconductor device equations with respect to carrier concentration. An investigation into the effect of illumination intensity on the I-V parameters of a spot illuminated BC-BJ Si solar cell showed a linear increase and a logarithmic increase of the short circuit current and open circuit voltage respectively with intensity while the series resistance decreased with intensity, which was attributed to increase in conductivity of the active layer. The ideality factor and saturation current were observed to increase while the shunt resistance initially increased before decreasing at higher intensity levels. Under monochromatic illumination, the photo-response of the BC-BJ Si cell was higher at 785nm than at 445nm due to low absorption coefficient of Si for longer wavelength radiations, resulting in carrier generation within the bulk, where there is a higher probability of carriers being collected at the p-n junction before they recombine. Under solar illumination, as the spectral content was altered using long pass colour filters with cut off wavelengths of 610nm and 1000nm, the performance parameters were observed to decrease and this was mainly due to decrease in intensity. For the CTJ solar cell, however, blocking of radiations below 610nm resulted in current mismatch that severely degraded the short circuit current (Isc). The current mismatch affected the extracted device and performance parameters. With a 1000nm long pass filter, a dark I-V was obtained since only the bottom Ge subcell was activated.
- Full Text:
- Date Issued: 2015
Enantioselective transformations using tetrol as a chiral mediator
- Authors: Dorfling, Sasha-Lee
- Date: 2015
- Subjects: Enantioselective catalysis , Trichothecenes , Catalysts , Titanium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10445 , http://hdl.handle.net/10948/d1021195
- Description: (+)-(2R,3R)-1,1,4,4-Tetraphenylbutane-1,2,3,4-tetraol (TETROL) and its derivatives were reacted with varying molar ratios of titanium isopropoxide (2:1, 1:1 and 1:2 tetraol:titanium isopropoxide) in an attempt to prepare potential titanium-based tetraol catalysts for enantioselective transformations. In each case, infrared and HNMR spectra suggested that the product was formed. We tentatively proposed that the structure of the catalyst was a spiro-type, but we could not determine conclusively what its exact structure was, despite using numerous techniques at our disposal (molecular modelling calculations, H NMR and IR spectroscopy, thermal analyses, powder diffraction, and single crystal X-ray diffraction). The catalyst and derivatives thereof were able to act catalytically for the enantioselective additions of diethylzinc compounds to aldehydes. The effects of temperature and solvent were investigated, and toluene and -78 °C were selected as optimal from the results obtained. (The reaction could, however, not be maintained at this low temperature for extended periods due to the fact that we did not have, at our disposal, the correct equipment. Each 16 h reaction was thus allowed to reach room temperature in each case.) The selectivity for the product 1-phenylpropan-1-ol (when benzaldehyde was the starting aldehyde) varied depending on the nature of the aryl substituents of the titanium-based catalyst. Using 0.2 molar equivalents of the chiral titanates, the highest selectivity was 42 percent (e.e.), but only when excess Ti(O-i-Pr)4 had been added to the reaction mixture. This was achieved with the tetra(ortho-methoxyphenyl)-TETROLate derivative. TETROL and its derivatives were also successful in metal-free catalysis where higher conversions and selectivities were observed, compared to when these were complexed to titanium. The highest selectivity was 70 percent (e.e.), achieved with the tetra(ortho-methylphenyl)TETROL derivative.
- Full Text:
- Date Issued: 2015
- Authors: Dorfling, Sasha-Lee
- Date: 2015
- Subjects: Enantioselective catalysis , Trichothecenes , Catalysts , Titanium
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:10445 , http://hdl.handle.net/10948/d1021195
- Description: (+)-(2R,3R)-1,1,4,4-Tetraphenylbutane-1,2,3,4-tetraol (TETROL) and its derivatives were reacted with varying molar ratios of titanium isopropoxide (2:1, 1:1 and 1:2 tetraol:titanium isopropoxide) in an attempt to prepare potential titanium-based tetraol catalysts for enantioselective transformations. In each case, infrared and HNMR spectra suggested that the product was formed. We tentatively proposed that the structure of the catalyst was a spiro-type, but we could not determine conclusively what its exact structure was, despite using numerous techniques at our disposal (molecular modelling calculations, H NMR and IR spectroscopy, thermal analyses, powder diffraction, and single crystal X-ray diffraction). The catalyst and derivatives thereof were able to act catalytically for the enantioselective additions of diethylzinc compounds to aldehydes. The effects of temperature and solvent were investigated, and toluene and -78 °C were selected as optimal from the results obtained. (The reaction could, however, not be maintained at this low temperature for extended periods due to the fact that we did not have, at our disposal, the correct equipment. Each 16 h reaction was thus allowed to reach room temperature in each case.) The selectivity for the product 1-phenylpropan-1-ol (when benzaldehyde was the starting aldehyde) varied depending on the nature of the aryl substituents of the titanium-based catalyst. Using 0.2 molar equivalents of the chiral titanates, the highest selectivity was 42 percent (e.e.), but only when excess Ti(O-i-Pr)4 had been added to the reaction mixture. This was achieved with the tetra(ortho-methoxyphenyl)-TETROLate derivative. TETROL and its derivatives were also successful in metal-free catalysis where higher conversions and selectivities were observed, compared to when these were complexed to titanium. The highest selectivity was 70 percent (e.e.), achieved with the tetra(ortho-methylphenyl)TETROL derivative.
- Full Text:
- Date Issued: 2015
Electrical-static discharge in single point diamond turning machining of contact lens polymers
- Authors: Kadermani, Mohamed Munir
- Date: 2015
- Subjects: Electric discharges , Electrostatics , Contact lenses , Polymers
- Language: English
- Type: Thesis , Masters , MEngineering (Mechatronics)
- Identifier: http://hdl.handle.net/10948/4055 , vital:20508
- Description: Single Point Diamond Turning (SPDT) is a technology widely applied for the fabrication of contact lenses. One of the limiting factors in polymer machining is wear of the diamond tool due to electrostatic discharge resulting in poor surface quality of the machined products. The research work presented in this dissertation highlights the electrostatic properties of contact lenses during machining operations and the effects these properties have on the surface quality of the work piece materials. Two contact lens samples were experimented on, Definitive 74 (Silicone Hydrogel) and Tyro 97 (Rigid Gas Permeable). The electrostatic surface potentials (ESPs) were measured during turning operations using an electrostatic voltmeter and the surface roughness measurements were taken using a surface profilometer. Response Surface Methodology (RSM) techniques were employed to create predictive models for both surface roughness and ESPs with respect to the cutting speed, feed rate and depth of cut. Predictive surface roughness models were successfully generated for both materials and the cutting speed and feed rate were identified as the parameters with most effect on surface roughness. In addition, an electrostatic model was successfully generated for the Definitive 74 contact lens material which cited the cutting speed and feed rate as the most effective parameters on the material’s electrostatic behaviour. However, no relationship was evident between the machining parameters and electrostatic behaviour of Tyro 97.
- Full Text:
- Date Issued: 2015
- Authors: Kadermani, Mohamed Munir
- Date: 2015
- Subjects: Electric discharges , Electrostatics , Contact lenses , Polymers
- Language: English
- Type: Thesis , Masters , MEngineering (Mechatronics)
- Identifier: http://hdl.handle.net/10948/4055 , vital:20508
- Description: Single Point Diamond Turning (SPDT) is a technology widely applied for the fabrication of contact lenses. One of the limiting factors in polymer machining is wear of the diamond tool due to electrostatic discharge resulting in poor surface quality of the machined products. The research work presented in this dissertation highlights the electrostatic properties of contact lenses during machining operations and the effects these properties have on the surface quality of the work piece materials. Two contact lens samples were experimented on, Definitive 74 (Silicone Hydrogel) and Tyro 97 (Rigid Gas Permeable). The electrostatic surface potentials (ESPs) were measured during turning operations using an electrostatic voltmeter and the surface roughness measurements were taken using a surface profilometer. Response Surface Methodology (RSM) techniques were employed to create predictive models for both surface roughness and ESPs with respect to the cutting speed, feed rate and depth of cut. Predictive surface roughness models were successfully generated for both materials and the cutting speed and feed rate were identified as the parameters with most effect on surface roughness. In addition, an electrostatic model was successfully generated for the Definitive 74 contact lens material which cited the cutting speed and feed rate as the most effective parameters on the material’s electrostatic behaviour. However, no relationship was evident between the machining parameters and electrostatic behaviour of Tyro 97.
- Full Text:
- Date Issued: 2015
Modification and application of the decentralised wastewater treatment technology for greywater treatment to reduce water needs
- Authors: Ngqwala, Nosiphiwe P
- Date: 2015
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/103714 , vital:32290
- Description: Expected release date-April 2017
- Full Text: false
- Date Issued: 2015
- Authors: Ngqwala, Nosiphiwe P
- Date: 2015
- Language: English
- Type: text , Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10962/103714 , vital:32290
- Description: Expected release date-April 2017
- Full Text: false
- Date Issued: 2015
Inkblots and their indices: rethreading perception in the work of Igshaan Adams
- Authors: Ball, Jennifer
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147293 , vital:38612 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC176316
- Description: Igshaan Adams is a young artist from Cape Town, working in multimedia and performance. In his practice, Adams brings ways of seeing and also ways of being into consideration through meditations on objects, dreams, Sufism, family relationships and the changeability of self-hood through perception of these phenomena. This paper engages with Adams' affinity with objects, their agency and biography,and considers how his sensitive interventions alter their materiality, shifting the ways in which they can be seen. The ways in which Adams' family relationships play out in the processes of making his sculptural works, and also in his performances, are then elucidated and related to his ongoing processes of self-enquiry. Furthermore, I consider Adams' latest body of work, a critical enquiry into the variable meanings of Rorschach inkblots. Adams reflects on the grounds for inkblot testing and, in so doing, tests and measures the nature of looking, perceiving and projecting.
- Full Text:
- Date Issued: 2015
- Authors: Ball, Jennifer
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/147293 , vital:38612 , https://0-hdl.handle.net.wam.seals.ac.za/10520/EJC176316
- Description: Igshaan Adams is a young artist from Cape Town, working in multimedia and performance. In his practice, Adams brings ways of seeing and also ways of being into consideration through meditations on objects, dreams, Sufism, family relationships and the changeability of self-hood through perception of these phenomena. This paper engages with Adams' affinity with objects, their agency and biography,and considers how his sensitive interventions alter their materiality, shifting the ways in which they can be seen. The ways in which Adams' family relationships play out in the processes of making his sculptural works, and also in his performances, are then elucidated and related to his ongoing processes of self-enquiry. Furthermore, I consider Adams' latest body of work, a critical enquiry into the variable meanings of Rorschach inkblots. Adams reflects on the grounds for inkblot testing and, in so doing, tests and measures the nature of looking, perceiving and projecting.
- Full Text:
- Date Issued: 2015
Comparison of protein binding microarray derived and ChIP-seq derived transcription factor binding DNA motifs
- Hlatshwayo, Nkosikhona Rejoyce
- Authors: Hlatshwayo, Nkosikhona Rejoyce
- Date: 2015
- Subjects: Protein binding , DNA , DNA microarrays , Transcription factors , DNA-protein interactions , Gene regulatory networks
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4146 , http://hdl.handle.net/10962/d1017907
- Description: Transcription factors (TFs) are biologically important proteins that interact with transcription machinery and bind DNA regulatory sequences to regulate gene expression by modulating the synthesis of the messenger RNA. The regulatory sequences comprise of short conserved regions of a specific length called motifs . TFs have very diverse roles in different cells and play a very significant role in development. TFs have been associated with carcinogenesis in various tissue types, as well as developmental and hormone response disorders. They may be responsible for the regulation of oncogenes and can be oncogenic. Consequently, understanding TF binding and knowing the motifs to which they bind is worthy of attention and research focus. Various projects have made the study of TF binding their main focus; nevertheless, much about TF binding remains confounding. Chromatin immunoprecipitation in conjunction with deep sequencing (ChIP-seq) techniques are a popular method used to investigate DNA-TF interactions in vivo. This procedure is followed by motif discovery and motif enrichment analysis using relevant tools. Protein Binding Microarrays (PBMs) are an in vitro method for investigating DNA-TF interactions. We use a motif enrichment analysis tools (CentriMo and AME) and an empirical quality assessment tool (Area under the ROC curve) to investigate which method yields motifs that are a true representation of in vivo binding. Motif enrichment analysis: On average, ChIP-seq derived motifs from the JASPAR Core database outperformed PBM derived ones from the UniPROBE mouse database. However, the performance of motifs derived using these two methods is not much different from each other when using CentriMo and AME. The E-values from Motif enrichment analysis were not too different from each other or 0. CentriMo showed that in 35 cases JASPAR Core ChIP-seq derived motifs outperformed UniPROBE mouse PBM derived motifs, while it was only in 11 cases that PBM derived motifs outperformed ChIP-seq derived motifs. AME showed that in 18 cases JASPAR Core ChIP-seq derived motifs did better, while only it was only in 3 cases that UniPROBE motifs outperformed ChIP-seq derived motifs. We could not distinguish the performance in 25 cases. Empirical quality assessment: Area under the ROC curve values computations followed by a two-sided t-test showed that there is no significant difference in the average performances of the motifs from the two databases (with 95% confidence, mean of differences=0.0088125 p-value= 0.4874, DF=47) .
- Full Text:
- Date Issued: 2015
- Authors: Hlatshwayo, Nkosikhona Rejoyce
- Date: 2015
- Subjects: Protein binding , DNA , DNA microarrays , Transcription factors , DNA-protein interactions , Gene regulatory networks
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4146 , http://hdl.handle.net/10962/d1017907
- Description: Transcription factors (TFs) are biologically important proteins that interact with transcription machinery and bind DNA regulatory sequences to regulate gene expression by modulating the synthesis of the messenger RNA. The regulatory sequences comprise of short conserved regions of a specific length called motifs . TFs have very diverse roles in different cells and play a very significant role in development. TFs have been associated with carcinogenesis in various tissue types, as well as developmental and hormone response disorders. They may be responsible for the regulation of oncogenes and can be oncogenic. Consequently, understanding TF binding and knowing the motifs to which they bind is worthy of attention and research focus. Various projects have made the study of TF binding their main focus; nevertheless, much about TF binding remains confounding. Chromatin immunoprecipitation in conjunction with deep sequencing (ChIP-seq) techniques are a popular method used to investigate DNA-TF interactions in vivo. This procedure is followed by motif discovery and motif enrichment analysis using relevant tools. Protein Binding Microarrays (PBMs) are an in vitro method for investigating DNA-TF interactions. We use a motif enrichment analysis tools (CentriMo and AME) and an empirical quality assessment tool (Area under the ROC curve) to investigate which method yields motifs that are a true representation of in vivo binding. Motif enrichment analysis: On average, ChIP-seq derived motifs from the JASPAR Core database outperformed PBM derived ones from the UniPROBE mouse database. However, the performance of motifs derived using these two methods is not much different from each other when using CentriMo and AME. The E-values from Motif enrichment analysis were not too different from each other or 0. CentriMo showed that in 35 cases JASPAR Core ChIP-seq derived motifs outperformed UniPROBE mouse PBM derived motifs, while it was only in 11 cases that PBM derived motifs outperformed ChIP-seq derived motifs. AME showed that in 18 cases JASPAR Core ChIP-seq derived motifs did better, while only it was only in 3 cases that UniPROBE motifs outperformed ChIP-seq derived motifs. We could not distinguish the performance in 25 cases. Empirical quality assessment: Area under the ROC curve values computations followed by a two-sided t-test showed that there is no significant difference in the average performances of the motifs from the two databases (with 95% confidence, mean of differences=0.0088125 p-value= 0.4874, DF=47) .
- Full Text:
- Date Issued: 2015
A comparative exploratory analysis of vigilante occurrences in two communities in Port Elizabeth (Kwazakhele and New Brighton)
- Authors: Loqani, Anelisa
- Date: 2015
- Subjects: Vigilantes Crime prevention -- Citizen participation -- Social aspects -- South Africa --Eastern Cape Crime -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5369 , vital:29216
- Description: The study explores and compares the incidents of vigilantism in two selected communities in Port Elizabeth. However, the word ‘vigilantism’ as utilized in the study can be explained as the group of people in a community who take the law into their own hands and punish alleged societal offenders on the spot. Vigilante activities have become a regular occurrence in many communities in Port Elizabeth and in South Africa as whole. This phenomenon as reported by several authors has destroyed many young men’s lives and ambitions. This is a paradoxical situation that violates human rights because South Africa is a country with a Constitution that prioritizes human dignity for all, and citizens that are totally free from violence of any kind. The aim of the study is to explore, analyze and compare the incidents of vigilantism in New Brighton and Kwazakhele communities in Port Elizabeth. The intention is to educate and enlighten the members of the selected communities, together with the public about vigilantism and its impact on communities. The researcher achieved the aim of this study by asking the following questions: • What are the motives of individuals/communities who take the law into their own hands? • What impact do vigilante incidents have on communities? • Which effective preventative measures can be utilized to combat vigilantism? To answer these questions, questionnaires for data collection were utilized. The study was conducted using a total population of one hundred (100) participants who were divided by two. Each community had a sample of fifty (50) participants. The participants were selected by utilizing purposive sampling technique which is non-probability sampling. The participants were the community members of the selected communities. The researcher applied a qualitative research methodology in order to obtain in-depth information and utilized content thematic analysis and SPSS software for the analysis of the data gathered. Two theories a) Differential Association Theory and b) Social Learning Theory were employed to interpret the findings of the study. iv The results of the study demonstrate that there has been an escalation in vigilante activities in Port Elizabeth communities since 2000 and 2010. In many vigilante actions that occurred, males (ages between 18 and 30 years) were found to be the majority of the people who were more likely to be victims of vigilantism because of the crimes they commit. The results also demonstrate that an increase in vigilante incidents in New Brighton and Kwazakhele have been reported to be a result of the ineffectiveness of visible policing, easy bail conditions and frustration and anger of the community members, who do not see the criminals being arrested. These vigilante activities have been reported to have negative impact in these communities specifically on children. Based on this issue of vigilantism, several strategies that could assist to combat vigilante actions were made. The participants suggested that government should improve the criminal justice system as a whole in order to reduce vigilantism. The respondents also indicated that government should create jobs for the youths because other people become involved in criminal activities, because of poverty and lack of employment opportunities. Furthermore, the participants proposed that government should enact tough laws on offenders. v.
- Full Text:
- Date Issued: 2015
- Authors: Loqani, Anelisa
- Date: 2015
- Subjects: Vigilantes Crime prevention -- Citizen participation -- Social aspects -- South Africa --Eastern Cape Crime -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , Degree
- Identifier: http://hdl.handle.net/10353/5369 , vital:29216
- Description: The study explores and compares the incidents of vigilantism in two selected communities in Port Elizabeth. However, the word ‘vigilantism’ as utilized in the study can be explained as the group of people in a community who take the law into their own hands and punish alleged societal offenders on the spot. Vigilante activities have become a regular occurrence in many communities in Port Elizabeth and in South Africa as whole. This phenomenon as reported by several authors has destroyed many young men’s lives and ambitions. This is a paradoxical situation that violates human rights because South Africa is a country with a Constitution that prioritizes human dignity for all, and citizens that are totally free from violence of any kind. The aim of the study is to explore, analyze and compare the incidents of vigilantism in New Brighton and Kwazakhele communities in Port Elizabeth. The intention is to educate and enlighten the members of the selected communities, together with the public about vigilantism and its impact on communities. The researcher achieved the aim of this study by asking the following questions: • What are the motives of individuals/communities who take the law into their own hands? • What impact do vigilante incidents have on communities? • Which effective preventative measures can be utilized to combat vigilantism? To answer these questions, questionnaires for data collection were utilized. The study was conducted using a total population of one hundred (100) participants who were divided by two. Each community had a sample of fifty (50) participants. The participants were selected by utilizing purposive sampling technique which is non-probability sampling. The participants were the community members of the selected communities. The researcher applied a qualitative research methodology in order to obtain in-depth information and utilized content thematic analysis and SPSS software for the analysis of the data gathered. Two theories a) Differential Association Theory and b) Social Learning Theory were employed to interpret the findings of the study. iv The results of the study demonstrate that there has been an escalation in vigilante activities in Port Elizabeth communities since 2000 and 2010. In many vigilante actions that occurred, males (ages between 18 and 30 years) were found to be the majority of the people who were more likely to be victims of vigilantism because of the crimes they commit. The results also demonstrate that an increase in vigilante incidents in New Brighton and Kwazakhele have been reported to be a result of the ineffectiveness of visible policing, easy bail conditions and frustration and anger of the community members, who do not see the criminals being arrested. These vigilante activities have been reported to have negative impact in these communities specifically on children. Based on this issue of vigilantism, several strategies that could assist to combat vigilante actions were made. The participants suggested that government should improve the criminal justice system as a whole in order to reduce vigilantism. The respondents also indicated that government should create jobs for the youths because other people become involved in criminal activities, because of poverty and lack of employment opportunities. Furthermore, the participants proposed that government should enact tough laws on offenders. v.
- Full Text:
- Date Issued: 2015
Nonlinear optical studies of phthalocyanines and triazatetrabenzcorroles in solution and in thin films
- Authors: Mkhize, Nhlakanipho Colin
- Date: 2015
- Subjects: Phthalocyanines , Thin films , Nonlinear optics , Phosphorus
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4542 , http://hdl.handle.net/10962/d1017922
- Description: This work presents photophysical and nonlinear optical properties of a novel Cd 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (CdOtBPPc) and compared with those of Pb 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (PbOtBPPc). For both the CdOtBPPc and PbOtBPPc, third order imaginary susceptibility and second order hyperpolarizability values were found to be within the limit set for good optical limiters. The Pcs were embedded in poly (methyl methacrylate) (PMMA) and poly(bisphenol A carbonate) (PBC) as thin films. The optical limiting values of the Pcs once embedded in film were found to be greatly improved and the limiting intensity of each film was well below the maximum threshold. Both PbOtBPPc and CdOtBPPc showed better optical limiting when embedded in PBC compared to PMMA. CdOtBPPc shows better nonlinear optical behaviour than PbOtBPPc in solution and as thin films, even though the former is aggregated in solution. Novel phosphorus triazatetrabenzcorroles (TBC) tetrasubstituted at the α- and β- and octa substituted at the β- positions of the peripheral fused benzene rings with t-butylphenoxy substituents were prepared and characterized. The effects of the substituents and the missing aza-nitrogen on the electronic structures and optical spectroscopy are investigated with TD-DFT calculations and MCD spectroscopy. The optical limiting properties were investigated to examine whether the lower symmetry that results from the direct pyrrole-pyrrole bond and hence the permanent dipole moment that is introduced result in higher safety thresholds, relative to the values that have been reported for phthalocyanines. The suitability of the compounds for singlet oxygen applications has also been examined. Novel phosphorus phthalocyanines, analogous to the triazatetrabenzcorroles were also investigated. Due to their high photodegradation quantum yield however, only the fluorescence quantum yields and lifetimes were able to be determined.
- Full Text:
- Date Issued: 2015
- Authors: Mkhize, Nhlakanipho Colin
- Date: 2015
- Subjects: Phthalocyanines , Thin films , Nonlinear optics , Phosphorus
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4542 , http://hdl.handle.net/10962/d1017922
- Description: This work presents photophysical and nonlinear optical properties of a novel Cd 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (CdOtBPPc) and compared with those of Pb 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (PbOtBPPc). For both the CdOtBPPc and PbOtBPPc, third order imaginary susceptibility and second order hyperpolarizability values were found to be within the limit set for good optical limiters. The Pcs were embedded in poly (methyl methacrylate) (PMMA) and poly(bisphenol A carbonate) (PBC) as thin films. The optical limiting values of the Pcs once embedded in film were found to be greatly improved and the limiting intensity of each film was well below the maximum threshold. Both PbOtBPPc and CdOtBPPc showed better optical limiting when embedded in PBC compared to PMMA. CdOtBPPc shows better nonlinear optical behaviour than PbOtBPPc in solution and as thin films, even though the former is aggregated in solution. Novel phosphorus triazatetrabenzcorroles (TBC) tetrasubstituted at the α- and β- and octa substituted at the β- positions of the peripheral fused benzene rings with t-butylphenoxy substituents were prepared and characterized. The effects of the substituents and the missing aza-nitrogen on the electronic structures and optical spectroscopy are investigated with TD-DFT calculations and MCD spectroscopy. The optical limiting properties were investigated to examine whether the lower symmetry that results from the direct pyrrole-pyrrole bond and hence the permanent dipole moment that is introduced result in higher safety thresholds, relative to the values that have been reported for phthalocyanines. The suitability of the compounds for singlet oxygen applications has also been examined. Novel phosphorus phthalocyanines, analogous to the triazatetrabenzcorroles were also investigated. Due to their high photodegradation quantum yield however, only the fluorescence quantum yields and lifetimes were able to be determined.
- Full Text:
- Date Issued: 2015
Troubling the troubled identities of victims and perpetrators in approaches to social justice:
- Authors: Edlmann, Theresa
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143593 , vital:38265 , https://ischp.files.wordpress.com/2015/08/ischp_2015_abstract_booklet.pdf
- Description: The terms “victim” and “perpetrator” have become an integral part of human rights-based language about systemic, political, sexual and interpersonal violence. This paper will argue that the terms “victim” and “perpetrator” reflect social constructs whose meaning and impact have shifted and changed over time, but that these evolutions have seldom been adequately interrogated or understood. In developing this argument, the paper will provide a brief historical outline of the emergence and use of these terms in social justice work since the mid-twentieth century, and explore the extent to which they comprise what narrative inquiry would call “discursive resources” which are often “troubled”. The paper will highlight the need for greater critical refection about the psychological, social and political discourses of identity that constellate around terms such as “victim” and “perpetrator”. It will also reflect on the conceptual underpinnings of contemporary mechanisms to address violence that these constructs and discourses give rise to.
- Full Text:
- Date Issued: 2015
- Authors: Edlmann, Theresa
- Date: 2015
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/143593 , vital:38265 , https://ischp.files.wordpress.com/2015/08/ischp_2015_abstract_booklet.pdf
- Description: The terms “victim” and “perpetrator” have become an integral part of human rights-based language about systemic, political, sexual and interpersonal violence. This paper will argue that the terms “victim” and “perpetrator” reflect social constructs whose meaning and impact have shifted and changed over time, but that these evolutions have seldom been adequately interrogated or understood. In developing this argument, the paper will provide a brief historical outline of the emergence and use of these terms in social justice work since the mid-twentieth century, and explore the extent to which they comprise what narrative inquiry would call “discursive resources” which are often “troubled”. The paper will highlight the need for greater critical refection about the psychological, social and political discourses of identity that constellate around terms such as “victim” and “perpetrator”. It will also reflect on the conceptual underpinnings of contemporary mechanisms to address violence that these constructs and discourses give rise to.
- Full Text:
- Date Issued: 2015
Working Towards Improved Facilitation of Research Capacity Development at Walter Sisulu University (WSU) Using Action Research (AR) Methodology
- Sotshangane, Nkosinathi Owen
- Authors: Sotshangane, Nkosinathi Owen
- Date: 2015
- Subjects: Capacity development -- Research Research -- Higher education Research development -- Study and teaching -- South Africa Education, higher -- Action Research -- South Africa
- Language: English
- Type: Thesis , Doctoral , D Ed
- Identifier: http://hdl.handle.net/11260/901 , vital:30009
- Description: This study was originally undertaken to change and improve the way I do my practice at Walter Sisulu University as a Research Associate whose responsibility is to facilitate research capacity development and research excellence within the University, amongst academics and postgraduate students. The success of the Research Resource Centre that I manage depends on the way I promote research culture and research productivity amongst academics and postgraduate students. According to Leedy and Ormrod (2013, p. 2), research is a systematic process that is used to collect, analyse, and interpret data in order to increase my understanding of the phenomenon about interest and concern about a given/identified phenomenon. In this case my own practice changed and improved for the better. The main objective of this study, therefore, was to examine the reasons behind the decline in research productivity in terms of research output and how this could be reversed through action research study intervention in order to enhance research productivity at Walter Sisulu University (WSU). The Department of Higher Education and Training’s (DHET) allocation of research output units for WSU indicated that there was a decline in research output from 2005 to 2010. The extent to which my practice improvement could contribute towards changing or improving research productivity was a question which this study addressed through a quantitative, qualitative and self-reflective action research cyclic inquiry. I organized sample strategies of this study as follows: For quantitative data, I used 120 lecturers as my respondents through questionnaires (females = 47 and males = 73) who were randomly selected; For qualitative data, I used 24 lecturers as respondents who were randomly selected with whom I conducted interviews; and For self-reflective action research cyclic inquiry I used 7 Transformative Education/al Studies (TES) project group members as my focus group. My research findings concluded that the heavy teaching workload at WSU was problematic and lecturers/academics could not devote time to do research. My recommendation is that research should be made compulsory so that academics become aware that at least one or two published articles are required from them, for the benefit of annual university research productivity. Some research participants also recommended that the Research Resource Centre must include programs that focus directly on active participation in research in order to increase the capacity of individual researchers so as to build a critical mass of competent researchers, perhaps by even including incentives as a reward for doing research. According to Koshy (2010), action research is a specific method of conducting research by professionals and practitioners with the ultimate aim of improving practice. My new knowledge, therefore, in respect of how a concerned Research Associate, from a Historically Disadvantaged Institution (HDI), provided the impetus to create a collaborative practice in a higher education institution which was forced to merge with two former technikons (which lacked understanding of what a university means by research productivity and research output). I consequently developed the Nkosinathi Sotshangane’s cyclic practice improvement model through self-reflective action research, from which I believed other research practitioners could learn by doing something similar in their own context.
- Full Text:
- Date Issued: 2015
- Authors: Sotshangane, Nkosinathi Owen
- Date: 2015
- Subjects: Capacity development -- Research Research -- Higher education Research development -- Study and teaching -- South Africa Education, higher -- Action Research -- South Africa
- Language: English
- Type: Thesis , Doctoral , D Ed
- Identifier: http://hdl.handle.net/11260/901 , vital:30009
- Description: This study was originally undertaken to change and improve the way I do my practice at Walter Sisulu University as a Research Associate whose responsibility is to facilitate research capacity development and research excellence within the University, amongst academics and postgraduate students. The success of the Research Resource Centre that I manage depends on the way I promote research culture and research productivity amongst academics and postgraduate students. According to Leedy and Ormrod (2013, p. 2), research is a systematic process that is used to collect, analyse, and interpret data in order to increase my understanding of the phenomenon about interest and concern about a given/identified phenomenon. In this case my own practice changed and improved for the better. The main objective of this study, therefore, was to examine the reasons behind the decline in research productivity in terms of research output and how this could be reversed through action research study intervention in order to enhance research productivity at Walter Sisulu University (WSU). The Department of Higher Education and Training’s (DHET) allocation of research output units for WSU indicated that there was a decline in research output from 2005 to 2010. The extent to which my practice improvement could contribute towards changing or improving research productivity was a question which this study addressed through a quantitative, qualitative and self-reflective action research cyclic inquiry. I organized sample strategies of this study as follows: For quantitative data, I used 120 lecturers as my respondents through questionnaires (females = 47 and males = 73) who were randomly selected; For qualitative data, I used 24 lecturers as respondents who were randomly selected with whom I conducted interviews; and For self-reflective action research cyclic inquiry I used 7 Transformative Education/al Studies (TES) project group members as my focus group. My research findings concluded that the heavy teaching workload at WSU was problematic and lecturers/academics could not devote time to do research. My recommendation is that research should be made compulsory so that academics become aware that at least one or two published articles are required from them, for the benefit of annual university research productivity. Some research participants also recommended that the Research Resource Centre must include programs that focus directly on active participation in research in order to increase the capacity of individual researchers so as to build a critical mass of competent researchers, perhaps by even including incentives as a reward for doing research. According to Koshy (2010), action research is a specific method of conducting research by professionals and practitioners with the ultimate aim of improving practice. My new knowledge, therefore, in respect of how a concerned Research Associate, from a Historically Disadvantaged Institution (HDI), provided the impetus to create a collaborative practice in a higher education institution which was forced to merge with two former technikons (which lacked understanding of what a university means by research productivity and research output). I consequently developed the Nkosinathi Sotshangane’s cyclic practice improvement model through self-reflective action research, from which I believed other research practitioners could learn by doing something similar in their own context.
- Full Text:
- Date Issued: 2015
The socio-economic impact of a food production programme: Qamata irrigation scheme
- Authors: Mafu, Nozipho
- Date: 2015
- Subjects: Food security -- South Africa -- Eastern Cape , Irrigation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/7772 , vital:24283
- Description: Irrigation Schemes were introduce to be hub for food production and provision of job opportunities for rural communities. The idea also focused on provision of water in most dry areas but with potential soil for production. The introduction of government food security program came as means to achieve these objectives by subsidizing farmers with inputs and mechanical operations so as to reduce cost of production. This paper analyses the social and economic impact of massive food program in changing the lives of communities at Qamata Irrigation scheme. The data were collected from households who were beneficiaries of massive food program at Qamata Irrigation scheme and analysed using a descriptive statistics. The results show that socio-economic factors which include storage facilities, access to markets channels, land acquisition and size, change in income limit the ability of farmers to produce and sell productively, since they cannot store their produce for better market prices and are also limited in terms of available market. They are forced to sell at local village level on credit or have their produce loss in poor storage facilities. Qamata irrigation scheme had limited access to formal markets and market information.
- Full Text:
- Date Issued: 2015
- Authors: Mafu, Nozipho
- Date: 2015
- Subjects: Food security -- South Africa -- Eastern Cape , Irrigation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/7772 , vital:24283
- Description: Irrigation Schemes were introduce to be hub for food production and provision of job opportunities for rural communities. The idea also focused on provision of water in most dry areas but with potential soil for production. The introduction of government food security program came as means to achieve these objectives by subsidizing farmers with inputs and mechanical operations so as to reduce cost of production. This paper analyses the social and economic impact of massive food program in changing the lives of communities at Qamata Irrigation scheme. The data were collected from households who were beneficiaries of massive food program at Qamata Irrigation scheme and analysed using a descriptive statistics. The results show that socio-economic factors which include storage facilities, access to markets channels, land acquisition and size, change in income limit the ability of farmers to produce and sell productively, since they cannot store their produce for better market prices and are also limited in terms of available market. They are forced to sell at local village level on credit or have their produce loss in poor storage facilities. Qamata irrigation scheme had limited access to formal markets and market information.
- Full Text:
- Date Issued: 2015
The investigation of perceptions of professional nurses regarding care of mental health care users in a general hospital setting
- Manona-Nkanjeni, Nonkanyiso Yvonne
- Authors: Manona-Nkanjeni, Nonkanyiso Yvonne
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Nursing Science)
- Identifier: vital:11924 , http://hdl.handle.net/10353/d1020200
- Description: This study sought to explore the perceptions of professional nurses regarding care of stabilised mental health care users in a general hospital setting. A qualitative, explanatory, descriptive and contextual design was used for the study. A non-probability, purposive sampling method was used to select 12 participants from the Cecilia Makiwane Hospital in Mdantsane. Data were collected through semi-structured interviews. The services of an independent interviewer were used to avoid any bias as interviews took place where the researcher is employed. The services of an editor were also used for language control (see Annexure H). The researcher repeatedly listened to the tapes used for data collection until completely satisfied with the interpretation of verbatim data. The research study was conducted in an ethically reflective manner and trustworthiness was ensured at all times. Four themes emerged from the analysis of the interviews: fear, stigma, myths and training. The researcher utilised the services of an independent coder who verified the identified major themes. The findings revealed that participants were fearful due to lack of knowledge, experience and psychiatric nursing skills. Participants feared because they lack knowledge about psychiatric medication and because mental health care users may have relapse. The participants also attached a stigma to mental health care users, which resulted in poor communication between participants and the stabilised mental health care user; a negative attitude towards mental health care users; and non-acceptance. Participants believed in myths about mental illness; they regarded it as contagious; and perceived mental health care users as dangerous. The participants strongly recommended that training should be provided to improve their knowledge and skills to enable them to care for stabilised mental health care users in a general hospital setting. The following should be facilitated: in-service training; adoption of a positive attitude; dispersal of myths and fear; education about referral systems; and allocation of specialist psychiatric nurses to medical wards for referral purposes with regard to complicated cases.
- Full Text:
- Date Issued: 2015
- Authors: Manona-Nkanjeni, Nonkanyiso Yvonne
- Date: 2015
- Language: English
- Type: Thesis , Masters , MSc (Nursing Science)
- Identifier: vital:11924 , http://hdl.handle.net/10353/d1020200
- Description: This study sought to explore the perceptions of professional nurses regarding care of stabilised mental health care users in a general hospital setting. A qualitative, explanatory, descriptive and contextual design was used for the study. A non-probability, purposive sampling method was used to select 12 participants from the Cecilia Makiwane Hospital in Mdantsane. Data were collected through semi-structured interviews. The services of an independent interviewer were used to avoid any bias as interviews took place where the researcher is employed. The services of an editor were also used for language control (see Annexure H). The researcher repeatedly listened to the tapes used for data collection until completely satisfied with the interpretation of verbatim data. The research study was conducted in an ethically reflective manner and trustworthiness was ensured at all times. Four themes emerged from the analysis of the interviews: fear, stigma, myths and training. The researcher utilised the services of an independent coder who verified the identified major themes. The findings revealed that participants were fearful due to lack of knowledge, experience and psychiatric nursing skills. Participants feared because they lack knowledge about psychiatric medication and because mental health care users may have relapse. The participants also attached a stigma to mental health care users, which resulted in poor communication between participants and the stabilised mental health care user; a negative attitude towards mental health care users; and non-acceptance. Participants believed in myths about mental illness; they regarded it as contagious; and perceived mental health care users as dangerous. The participants strongly recommended that training should be provided to improve their knowledge and skills to enable them to care for stabilised mental health care users in a general hospital setting. The following should be facilitated: in-service training; adoption of a positive attitude; dispersal of myths and fear; education about referral systems; and allocation of specialist psychiatric nurses to medical wards for referral purposes with regard to complicated cases.
- Full Text:
- Date Issued: 2015
The role of RDP housing in revitalising the socio-economic environment
- Authors: Ntlangula, Zininzi
- Date: 2015
- Subjects: Low-income housing -- South Africa -- Eastern Cape , Economics -- Sociological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5268 , vital:20829
- Description: The role of RDP housing cannot be underestimated and it plays a big role in South Africa. It assists those who are less fortunate to afford to buy houses. RDP housing delivery is not only expected to put a roof over people's heads but to change their lives in various ways. RDP housing delivery tackles issues related to social and economic enviroment. In terms of policy documents and surveys, research has shown that it is critical to incorporate RDP housing beneficiaries from planning right up to development stage. Public participation and the involvement of beneficiaries from the planning stage onward assists in determining the basic needs of the community that can be addresed through RDP housing development. This study is about the role of RDP housing in revitalising the socio-economic environment with a specific reference to Second Creek, which is under the jurisdiction of Buffalo City Metropolitan Municipality.
- Full Text: false
- Date Issued: 2015
- Authors: Ntlangula, Zininzi
- Date: 2015
- Subjects: Low-income housing -- South Africa -- Eastern Cape , Economics -- Sociological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/5268 , vital:20829
- Description: The role of RDP housing cannot be underestimated and it plays a big role in South Africa. It assists those who are less fortunate to afford to buy houses. RDP housing delivery is not only expected to put a roof over people's heads but to change their lives in various ways. RDP housing delivery tackles issues related to social and economic enviroment. In terms of policy documents and surveys, research has shown that it is critical to incorporate RDP housing beneficiaries from planning right up to development stage. Public participation and the involvement of beneficiaries from the planning stage onward assists in determining the basic needs of the community that can be addresed through RDP housing development. This study is about the role of RDP housing in revitalising the socio-economic environment with a specific reference to Second Creek, which is under the jurisdiction of Buffalo City Metropolitan Municipality.
- Full Text: false
- Date Issued: 2015
The role of child support grants in poverty alleviation in rural communities
- Authors: Yapi, Kanyisa
- Date: 2015
- Subjects: Child welfare -- South Africa , Child support -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/7710 , vital:23396
- Description: This study seeks to investigate the challenges faced by the recipients of the child support grant, with special reference to Morgan Bay, a rural area under the aegis of the Amathole District Municipality in East London. The child support grant is a strategy that was introduced to alleviate poverty in previously disadvantaged communities. The child support grant replaced the state maintenance grant. South Africa has high levels of unemployment; and this situation is considered to be a major contributing factor to poverty. After the apartheid era, the African National Congress (ANC) led government introduced a litany of redistributive policy frameworks aimed at reversing the imbalances of the past created by the apartheid government. The child support grant, which was established during the year 1998, is viewed as one of the strategies introduced by the South African government aimed at alleviating poverty caused by the lack of jobs. The aim of the study is to assess the implementation of the child support grant impact as a developmental strategy in rural communities, such as Morgan Bay. The study seeks to determine how the child support grant redistribution has affected rural communities. In other words, the research seeks to determine whether the child support grant redistribution has affected rural communities positively or negatively, and to ascertain whether it has mitigated the impact of socio-economic challenges in rural communities. The study also seeks to explore other strategies, which could be implemented to supplement the child support grant, and possibly decrease the level of dependence on the child support grant – by having a back-up strategy for alleviating poverty.
- Full Text:
- Date Issued: 2015
- Authors: Yapi, Kanyisa
- Date: 2015
- Subjects: Child welfare -- South Africa , Child support -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/7710 , vital:23396
- Description: This study seeks to investigate the challenges faced by the recipients of the child support grant, with special reference to Morgan Bay, a rural area under the aegis of the Amathole District Municipality in East London. The child support grant is a strategy that was introduced to alleviate poverty in previously disadvantaged communities. The child support grant replaced the state maintenance grant. South Africa has high levels of unemployment; and this situation is considered to be a major contributing factor to poverty. After the apartheid era, the African National Congress (ANC) led government introduced a litany of redistributive policy frameworks aimed at reversing the imbalances of the past created by the apartheid government. The child support grant, which was established during the year 1998, is viewed as one of the strategies introduced by the South African government aimed at alleviating poverty caused by the lack of jobs. The aim of the study is to assess the implementation of the child support grant impact as a developmental strategy in rural communities, such as Morgan Bay. The study seeks to determine how the child support grant redistribution has affected rural communities. In other words, the research seeks to determine whether the child support grant redistribution has affected rural communities positively or negatively, and to ascertain whether it has mitigated the impact of socio-economic challenges in rural communities. The study also seeks to explore other strategies, which could be implemented to supplement the child support grant, and possibly decrease the level of dependence on the child support grant – by having a back-up strategy for alleviating poverty.
- Full Text:
- Date Issued: 2015
Dear space dad and other stories
- Authors: Kuit, Henali
- Date: 2015
- Subjects: South African fiction (English) -- 21st century , Short stories, South African -- 21st century , Creative writing (Higher education) , South African fiction -- Study and teaching (Higher)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5990 , http://hdl.handle.net/10962/d1017774
- Description: My stories are set around the themes of family, animals and outer space -- which leads to other themes like religion, loneliness, romance, eating animals, growing up and longing for the past. Most of the stories have non-linear structures. Some use gradual shiftings of narrator voice; in others the narrative is flat, lacking plot. I favour repetition over plot-based climaxes to create coherency and narrative flow. I also favour free indirect discourse over dialogue or description as a means to characterize.
- Full Text:
- Date Issued: 2015
- Authors: Kuit, Henali
- Date: 2015
- Subjects: South African fiction (English) -- 21st century , Short stories, South African -- 21st century , Creative writing (Higher education) , South African fiction -- Study and teaching (Higher)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:5990 , http://hdl.handle.net/10962/d1017774
- Description: My stories are set around the themes of family, animals and outer space -- which leads to other themes like religion, loneliness, romance, eating animals, growing up and longing for the past. Most of the stories have non-linear structures. Some use gradual shiftings of narrator voice; in others the narrative is flat, lacking plot. I favour repetition over plot-based climaxes to create coherency and narrative flow. I also favour free indirect discourse over dialogue or description as a means to characterize.
- Full Text:
- Date Issued: 2015