Enhanced nonlinear optical properties of octa-substituted lead and cadmium phthalocyanines when embedded in poly (bisphenol A carbonate) as thin films
- Mkhize, Colin, Britton, Jonathan, Nyokong, Tebello
- Authors: Mkhize, Colin , Britton, Jonathan , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241459 , vital:50941 , xlink:href="https://doi.org/10.1016/j.poly.2014.07.025"
- Description: This work presents photophysical and nonlinear optical properties of a novel Cd 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (CdOtBPPc) and compare them 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 fluence 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 behavior than PbOtBPPc in solution and as thin films, even though the former is aggregated in solution.
- Full Text:
- Date Issued: 2014
- Authors: Mkhize, Colin , Britton, Jonathan , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/241459 , vital:50941 , xlink:href="https://doi.org/10.1016/j.poly.2014.07.025"
- Description: This work presents photophysical and nonlinear optical properties of a novel Cd 2,3-[octakis{4-tert-butylphenoxyphthalocyanine}] (CdOtBPPc) and compare them 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 fluence 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 behavior than PbOtBPPc in solution and as thin films, even though the former is aggregated in solution.
- Full Text:
- Date Issued: 2014
Enhanced Optical Limiting Behavior of an Indium Phthalocyanine–Single-Walled Carbon Nanotube Composite
- Sanusi, Kayode, Amuhaya, Edith K, Nyokong, Tebello
- Authors: Sanusi, Kayode , Amuhaya, Edith K , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193871 , vital:45401 , xlink:href="https://doi.org/10.1021/jp501469e "
- Description: The nonlinear optical behavior of 2(3),9(10),16(17),23(24)-tetrakis-(4-aminophenoxy) phthalocyaninato indium (III) chloride (2) and its carbon nanotube composite in dimethylsulfoxide (DMSO) and dimethylformamide (DMF) solutions is described. The nonlinear third-order susceptibility and second-order hyperpolarizability values are also reported. A large nonlinear absorption that increased on covalent linking with single-walled carbon nanotubes (SWCNTs) was observed for the compound in DMSO. The nanosecond nonlinear absorption and the optical limiting behavior of this complex are shown to be dominated by a strong excited state absorption from a two-photon pumped state. The optical limiter using the new nanocomposite material (SWCNT-2) in the appropriate solvent showed a much lower threshold for optical limiting together with a much lower transmission at high fluences than previously reported nanocomposite limiters. The optical properties of the phthalocyanine and its conjugate were found to show high sensitivity toward the change of solvent matrix.
- Full Text:
- Date Issued: 2014
- Authors: Sanusi, Kayode , Amuhaya, Edith K , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193871 , vital:45401 , xlink:href="https://doi.org/10.1021/jp501469e "
- Description: The nonlinear optical behavior of 2(3),9(10),16(17),23(24)-tetrakis-(4-aminophenoxy) phthalocyaninato indium (III) chloride (2) and its carbon nanotube composite in dimethylsulfoxide (DMSO) and dimethylformamide (DMF) solutions is described. The nonlinear third-order susceptibility and second-order hyperpolarizability values are also reported. A large nonlinear absorption that increased on covalent linking with single-walled carbon nanotubes (SWCNTs) was observed for the compound in DMSO. The nanosecond nonlinear absorption and the optical limiting behavior of this complex are shown to be dominated by a strong excited state absorption from a two-photon pumped state. The optical limiter using the new nanocomposite material (SWCNT-2) in the appropriate solvent showed a much lower threshold for optical limiting together with a much lower transmission at high fluences than previously reported nanocomposite limiters. The optical properties of the phthalocyanine and its conjugate were found to show high sensitivity toward the change of solvent matrix.
- Full Text:
- Date Issued: 2014
Enhanced optical limiting performance in phthalocyanine-quantum dot nanocomposites by free-carrier absorption mechanism
- Sanusi, Kayode, Khene, Samson M, Nyokong, Tebello
- Authors: Sanusi, Kayode , Khene, Samson M , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193904 , vital:45404 , xlink:href="https://doi.org/10.1016/j.optmat.2014.07.024"
- Description: Enhanced nonlinear optical properties (in dimethyl sulphoxide) is observed for 2(3),9(10),16(17),23(24)-tetrakis-(4-aminophenoxy)phthalocyaninato indium(III) chloride (InPc) when covalently linked to CdSe/ZnS or CdSe quantum dots (QDs). The experimental nonlinear optical parameters were obtained from Z-Scan measurements. Contributions from two-photon absorption (2PA) due to the InPc, and free-carrier absorption (FCA) by QDS have been identified as the main factors responsible for the enhanced optical limiting. The effective nonlinear absorption coefficient for InPc-CdSe/ZnS was found to be 700.0 cm/GW. The FCA cross-sections for InPc-CdSe/ZnS and InPc-CdSe composites were found to be 1.52 × 10−19 and 6.00 × 10−20 cm2 respectively. A much lower limiting threshold of 92 mJ cm−2 was observed for InPc-CdSe/ZnS nanocomposite, hence, making it suitable for use as optical limiting material. Density Functional Theory (DFT) calculations on similar phthalocyanine-quantum dots system was modeled in order to explain the enhancement in the observed nonlinear optical properties of the Pc in the presence of the QDs. The experimentally determined nonlinear optical properties are well within the range of the DFT calculated properties.
- Full Text:
- Date Issued: 2014
- Authors: Sanusi, Kayode , Khene, Samson M , Nyokong, Tebello
- Date: 2014
- Subjects: To be catalogued
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/193904 , vital:45404 , xlink:href="https://doi.org/10.1016/j.optmat.2014.07.024"
- Description: Enhanced nonlinear optical properties (in dimethyl sulphoxide) is observed for 2(3),9(10),16(17),23(24)-tetrakis-(4-aminophenoxy)phthalocyaninato indium(III) chloride (InPc) when covalently linked to CdSe/ZnS or CdSe quantum dots (QDs). The experimental nonlinear optical parameters were obtained from Z-Scan measurements. Contributions from two-photon absorption (2PA) due to the InPc, and free-carrier absorption (FCA) by QDS have been identified as the main factors responsible for the enhanced optical limiting. The effective nonlinear absorption coefficient for InPc-CdSe/ZnS was found to be 700.0 cm/GW. The FCA cross-sections for InPc-CdSe/ZnS and InPc-CdSe composites were found to be 1.52 × 10−19 and 6.00 × 10−20 cm2 respectively. A much lower limiting threshold of 92 mJ cm−2 was observed for InPc-CdSe/ZnS nanocomposite, hence, making it suitable for use as optical limiting material. Density Functional Theory (DFT) calculations on similar phthalocyanine-quantum dots system was modeled in order to explain the enhancement in the observed nonlinear optical properties of the Pc in the presence of the QDs. The experimentally determined nonlinear optical properties are well within the range of the DFT calculated properties.
- Full Text:
- Date Issued: 2014
Enhanced visualisation techniques to support access to personal information across multiple devices
- Authors: Beets, Simone Yvonne
- Date: 2014
- Subjects: Information visualisation , Database management , Web services , Personal information management
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10500 , http://hdl.handle.net/10948/d1021136
- Description: The increasing number of devices owned by a single user makes it increasingly difficult to access, organise and visualise personal information (PI), i.e. documents and media, across these devices. The primary method that is currently used to organise and visualise PI is the hierarchical folder structure, which is a familiar and widely used means to manage PI. However, this hierarchy does not effectively support personal information management (PIM) across multiple devices. Current solutions, such as the Personal Information Dashboard and Stuff I’ve Seen, do not support PIM across multiple devices. Alternative PIM tools, such as Dropbox and TeamViewer, attempt to provide a means of accessing PI across multiple devices, but these solutions also suffer from several limitations. The aim of this research was to investigate to what extent enhanced information visualisation (IV) techniques could be used to support accessing PI across multiple devices. An interview study was conducted to identify how PI is currently managed across multiple devices. This interview study further motivated the need for a tool to support visualising PI across multiple devices and identified requirements for such an IV tool. Several suitable IV techniques were selected and enhanced to support PIM across multiple devices. These techniques comprised an Overview using a nested circles layout, a Tag Cloud and a Partition Layout, which used a novel set-based technique. A prototype, called MyPSI, was designed and implemented incorporating these enhanced IV techniques. The requirements and design of the MyPSI prototype were validated using a conceptual walkthrough. The design of the MyPSI prototype was initially implemented for a desktop or laptop device with mouse-based interaction. A sample personal space of information (PSI) was used to evaluate the prototype in a controlled user study. The user study was used to identify any usability problems with the MyPSI prototype. The results were highly positive and the participants agreed that such a tool could be useful in future. No major problems were identified with the prototype. The MyPSI prototype was then implemented on a mobile device, specifically an Android tablet device, using a similar design, but supporting touch-based interaction. Users were allowed to upload their own PSI using Dropbox, which was visualised by the MyPSI prototype. A field study was conducted following the Multi-dimensional In-depth Long-term Case Studies approach specifically designed for IV evaluation. The field study was conducted over a two-week period, evaluating both the desktop and mobile versions of the MyPSI prototype. Both versions received positive results, but the desktop version was slightly preferred over the mobile version, mainly due to familiarity and problems experienced with the mobile implementation. Design recommendations were derived to inform future designs of IV tools to support accessing PI across multiple devices. This research has shown that IV techniques can be enhanced to effectively support accessing PI across multiple devices. Future work will involve customising the MyPSI prototype for mobile phones and supporting additional platforms.
- Full Text:
- Date Issued: 2014
- Authors: Beets, Simone Yvonne
- Date: 2014
- Subjects: Information visualisation , Database management , Web services , Personal information management
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:10500 , http://hdl.handle.net/10948/d1021136
- Description: The increasing number of devices owned by a single user makes it increasingly difficult to access, organise and visualise personal information (PI), i.e. documents and media, across these devices. The primary method that is currently used to organise and visualise PI is the hierarchical folder structure, which is a familiar and widely used means to manage PI. However, this hierarchy does not effectively support personal information management (PIM) across multiple devices. Current solutions, such as the Personal Information Dashboard and Stuff I’ve Seen, do not support PIM across multiple devices. Alternative PIM tools, such as Dropbox and TeamViewer, attempt to provide a means of accessing PI across multiple devices, but these solutions also suffer from several limitations. The aim of this research was to investigate to what extent enhanced information visualisation (IV) techniques could be used to support accessing PI across multiple devices. An interview study was conducted to identify how PI is currently managed across multiple devices. This interview study further motivated the need for a tool to support visualising PI across multiple devices and identified requirements for such an IV tool. Several suitable IV techniques were selected and enhanced to support PIM across multiple devices. These techniques comprised an Overview using a nested circles layout, a Tag Cloud and a Partition Layout, which used a novel set-based technique. A prototype, called MyPSI, was designed and implemented incorporating these enhanced IV techniques. The requirements and design of the MyPSI prototype were validated using a conceptual walkthrough. The design of the MyPSI prototype was initially implemented for a desktop or laptop device with mouse-based interaction. A sample personal space of information (PSI) was used to evaluate the prototype in a controlled user study. The user study was used to identify any usability problems with the MyPSI prototype. The results were highly positive and the participants agreed that such a tool could be useful in future. No major problems were identified with the prototype. The MyPSI prototype was then implemented on a mobile device, specifically an Android tablet device, using a similar design, but supporting touch-based interaction. Users were allowed to upload their own PSI using Dropbox, which was visualised by the MyPSI prototype. A field study was conducted following the Multi-dimensional In-depth Long-term Case Studies approach specifically designed for IV evaluation. The field study was conducted over a two-week period, evaluating both the desktop and mobile versions of the MyPSI prototype. Both versions received positive results, but the desktop version was slightly preferred over the mobile version, mainly due to familiarity and problems experienced with the mobile implementation. Design recommendations were derived to inform future designs of IV tools to support accessing PI across multiple devices. This research has shown that IV techniques can be enhanced to effectively support accessing PI across multiple devices. Future work will involve customising the MyPSI prototype for mobile phones and supporting additional platforms.
- Full Text:
- Date Issued: 2014
Enhancement of the usability of SOA services for novice users
- Authors: Yalezo, Sabelo
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Computer Science)
- Identifier: http://hdl.handle.net/10353/822 , vital:26500
- Description: Recently, the automation of service integration has provided a significant advantage in delivering services to novice users. This art of integrating various services is known as Service Composition and its main purpose is to simplify the development process for web applications and facilitates reuse of services. It is one of the paradigms that enables services to end-users (i.e.service provisioning) through the outsourcing of web contents and it requires users to share and reuse services in more collaborative ways. Most service composers are effective at enabling integration of web contents, but they do not enable universal access across different groups of users. This is because, the currently existing content aggregators require complex interactions in order to create web applications (e.g., Web Service Business Process Execution Language (WS-BPEL)) as a result not all users are able to use such web tools. This trend demands changes in the web tools that end-users use to gain and share information, hence this research uses Mashups as a service composition technique to allow novice users to integrate publicly available Service Oriented Architecture (SOA) services, where there is a minimal active web application development. Mashups being the platforms that integrate disparate web Application Programming Interfaces (APIs) to create user defined web applications; presents a great opportunity for service provisioning. However, their usability for novice users remains invalidated since Mashup tools are not easy to use they require basic programming skills which makes the process of designing and creating Mashups difficult. This is because Mashup tools access heterogeneous web contents using public web APIs and the process of integrating them become complex since web APIs are tailored by different vendors. Moreover, the design of Mashup editors is unnecessary complex; as a result, users do not know where to start when creating Mashups. This research address the gap between Mashup tools and usability by the designing and implementing a semantically enriched Mashup tool to discover, annotate and compose APIs to improve the utilization of SOA services by novice users. The researchers conducted an analysis of the already existing Mashup tools to identify challenges and weaknesses experienced by novice Mashup users. The findings from the requirement analysis formulated the system usability requirements that informed the design and implementation of the proposed Mashup tool. The proposed architecture addressed three layers: composition, annotation and discovery. The researchers developed a simple Mashup tool referred to as soa-Services Provisioner (SerPro) that allowed novice users to create web application flexibly. Its usability and effectiveness was validated. The proposed Mashup tool enhanced the usability of SOA services, since data analysis and results showed that it was usable to novice users by scoring a System Usability Scale (SUS) score of 72.08. Furthermore, this research discusses the research limitations and future work for further improvements.
- Full Text:
- Date Issued: 2014
- Authors: Yalezo, Sabelo
- Date: 2014
- Language: English
- Type: Thesis , Masters , MSc (Computer Science)
- Identifier: http://hdl.handle.net/10353/822 , vital:26500
- Description: Recently, the automation of service integration has provided a significant advantage in delivering services to novice users. This art of integrating various services is known as Service Composition and its main purpose is to simplify the development process for web applications and facilitates reuse of services. It is one of the paradigms that enables services to end-users (i.e.service provisioning) through the outsourcing of web contents and it requires users to share and reuse services in more collaborative ways. Most service composers are effective at enabling integration of web contents, but they do not enable universal access across different groups of users. This is because, the currently existing content aggregators require complex interactions in order to create web applications (e.g., Web Service Business Process Execution Language (WS-BPEL)) as a result not all users are able to use such web tools. This trend demands changes in the web tools that end-users use to gain and share information, hence this research uses Mashups as a service composition technique to allow novice users to integrate publicly available Service Oriented Architecture (SOA) services, where there is a minimal active web application development. Mashups being the platforms that integrate disparate web Application Programming Interfaces (APIs) to create user defined web applications; presents a great opportunity for service provisioning. However, their usability for novice users remains invalidated since Mashup tools are not easy to use they require basic programming skills which makes the process of designing and creating Mashups difficult. This is because Mashup tools access heterogeneous web contents using public web APIs and the process of integrating them become complex since web APIs are tailored by different vendors. Moreover, the design of Mashup editors is unnecessary complex; as a result, users do not know where to start when creating Mashups. This research address the gap between Mashup tools and usability by the designing and implementing a semantically enriched Mashup tool to discover, annotate and compose APIs to improve the utilization of SOA services by novice users. The researchers conducted an analysis of the already existing Mashup tools to identify challenges and weaknesses experienced by novice Mashup users. The findings from the requirement analysis formulated the system usability requirements that informed the design and implementation of the proposed Mashup tool. The proposed architecture addressed three layers: composition, annotation and discovery. The researchers developed a simple Mashup tool referred to as soa-Services Provisioner (SerPro) that allowed novice users to create web application flexibly. Its usability and effectiveness was validated. The proposed Mashup tool enhanced the usability of SOA services, since data analysis and results showed that it was usable to novice users by scoring a System Usability Scale (SUS) score of 72.08. Furthermore, this research discusses the research limitations and future work for further improvements.
- Full Text:
- Date Issued: 2014
Enhancing parental involvement in primary schools in disadvantaged communities
- Hendricks, Charlotte Augusta
- Authors: Hendricks, Charlotte Augusta
- Date: 2014
- Subjects: Education, Primary -- Parent participation -- South Africa -- Port Elizabeth , Parent-teacher relationships -- South Africa -- Port Elizabeth , Ecological Systems Theory
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9461 , http://hdl.handle.net/10948/d1020169
- Description: The main research question guiding this study is: “What strategies can be established to enhance parental involvement in primary schools in disadvantaged communities in the Northern Areas of Port Elizabeth”? To answer this question, this study examines parents’ and teachers’ practices concerning parental involvement in the Northern Areas of Nelson Mandela Metropolitan. Parents and teachers were purposely selected from participating schools. In this qualitative study, the researcher proposed strategies to enhance parental involvement at primary schools. Qualitative research methods, associated with phenomenological inquiry were employed to explore the life-world of the participants who have had personal experience with the phenomenon of parental involvement. Data was collected through semi-structured interviews with parents and teachers. This allowed the researcher to gather in-depth information about opinions, beliefs, practices and attitudes concerning the involvement of parents in their children’s education. Bronfenbrenner’s ecosystemic theory served as the theorectical framework of this investigation. Since this study is about parental involvement in primary schools educational policies like inclusive education as well as different models of parental involvement were investigated in the literature study. The results of the study indicated several barriers to the enhancement of parental involvement for instance communication barriers between parents and teachers. The researcher established four strategies for the enhancement of parental involvement and recommended that these strategies should be employed by schools and other stakeholders. She also made further recommendations for parents, teachers, school principals, Department of Basic Education and professionals in the community.
- Full Text:
- Date Issued: 2014
- Authors: Hendricks, Charlotte Augusta
- Date: 2014
- Subjects: Education, Primary -- Parent participation -- South Africa -- Port Elizabeth , Parent-teacher relationships -- South Africa -- Port Elizabeth , Ecological Systems Theory
- Language: English
- Type: Thesis , Doctoral , DPhil
- Identifier: vital:9461 , http://hdl.handle.net/10948/d1020169
- Description: The main research question guiding this study is: “What strategies can be established to enhance parental involvement in primary schools in disadvantaged communities in the Northern Areas of Port Elizabeth”? To answer this question, this study examines parents’ and teachers’ practices concerning parental involvement in the Northern Areas of Nelson Mandela Metropolitan. Parents and teachers were purposely selected from participating schools. In this qualitative study, the researcher proposed strategies to enhance parental involvement at primary schools. Qualitative research methods, associated with phenomenological inquiry were employed to explore the life-world of the participants who have had personal experience with the phenomenon of parental involvement. Data was collected through semi-structured interviews with parents and teachers. This allowed the researcher to gather in-depth information about opinions, beliefs, practices and attitudes concerning the involvement of parents in their children’s education. Bronfenbrenner’s ecosystemic theory served as the theorectical framework of this investigation. Since this study is about parental involvement in primary schools educational policies like inclusive education as well as different models of parental involvement were investigated in the literature study. The results of the study indicated several barriers to the enhancement of parental involvement for instance communication barriers between parents and teachers. The researcher established four strategies for the enhancement of parental involvement and recommended that these strategies should be employed by schools and other stakeholders. She also made further recommendations for parents, teachers, school principals, Department of Basic Education and professionals in the community.
- Full Text:
- Date Issued: 2014
Enterococcus pathotypes as reservoirs of antibiotic resistance determinants in the Kat River and Fort Beaufort abstraction waters
- Authors: Ntloko, Phindiwe
- Date: 2014
- Subjects: Enterococcus , Drug resistance
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11290 , http://hdl.handle.net/10353/d1019821 , Enterococcus , Drug resistance
- Description: In this study, 400 presumptive Enterococcus isolates previously recovered from Kat River and Fort Beaufort Abstraction water dam were subjected to molecular confirmation and pathotyping. Two hundred and seventy-four (68%) of these isolates were confirmed to be enterococci species. Confirmations studies were polymerase chain reaction (PCR) based, using enterococci specific primers targeting the tuf gene. The confirmed enterococci isolates were further differentiated into their pathotypes, the targets of which were: E. faecalis, E. avium, E. hirae, E. casseliflavarus and E. gallinarum using well documented species specific primer sequences. E. faecalis accounted for 20% of the isolates, followed by E. avium (16%), E. hirae (13%), E. casseliflavarus (5%) and E. gallinarum (3%). Furthermore, all the confirmed isolates were analysed for antibiotic susceptibilities using a panel of nine different antibiotics, namely vancomycin, linezolid, ciprofloxacin, ampicillin, gentamicin, chloramphenicol, tetracycline, erythromycin, penicillin, and those that were resistant were assayed for the presence of relevant antibiotic resistance genes. All the 274 isolates were found to harbour vanA resistance gene confirming their phenotypic resistance to the vancomycin. Similarly, 60% (109/180) of the isolates showed phenotypic resistance to erythromycin which was further confirmed by the presence of ermA genes in these isolates. The presence of antibiotic resistant bacteria in surface waters poses a risk to public health.
- Full Text:
- Date Issued: 2014
- Authors: Ntloko, Phindiwe
- Date: 2014
- Subjects: Enterococcus , Drug resistance
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11290 , http://hdl.handle.net/10353/d1019821 , Enterococcus , Drug resistance
- Description: In this study, 400 presumptive Enterococcus isolates previously recovered from Kat River and Fort Beaufort Abstraction water dam were subjected to molecular confirmation and pathotyping. Two hundred and seventy-four (68%) of these isolates were confirmed to be enterococci species. Confirmations studies were polymerase chain reaction (PCR) based, using enterococci specific primers targeting the tuf gene. The confirmed enterococci isolates were further differentiated into their pathotypes, the targets of which were: E. faecalis, E. avium, E. hirae, E. casseliflavarus and E. gallinarum using well documented species specific primer sequences. E. faecalis accounted for 20% of the isolates, followed by E. avium (16%), E. hirae (13%), E. casseliflavarus (5%) and E. gallinarum (3%). Furthermore, all the confirmed isolates were analysed for antibiotic susceptibilities using a panel of nine different antibiotics, namely vancomycin, linezolid, ciprofloxacin, ampicillin, gentamicin, chloramphenicol, tetracycline, erythromycin, penicillin, and those that were resistant were assayed for the presence of relevant antibiotic resistance genes. All the 274 isolates were found to harbour vanA resistance gene confirming their phenotypic resistance to the vancomycin. Similarly, 60% (109/180) of the isolates showed phenotypic resistance to erythromycin which was further confirmed by the presence of ermA genes in these isolates. The presence of antibiotic resistant bacteria in surface waters poses a risk to public health.
- Full Text:
- Date Issued: 2014
Enterpreneurial orientation at Nelson Mandela Metropolitan University
- Fadairo, Feyisara Olufunmilayo
- Authors: Fadairo, Feyisara Olufunmilayo
- Date: 2014
- Subjects: Entrepreneurship -- South Africa , University-based new business enterprises -- South Africa , Nelson Mandela Metropolitan University
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9348 , http://hdl.handle.net/10948/d1020293
- Description: In the knowledge world into which mankind has progressed, universities are engines of economic growth. Their role has changed from producers of labour force to equal contributors - along with government and industry- in regional and national economic and social growth and development. Universities that will survive and succeed in this new climate must embrace entrepreneurship - become entrepreneurially oriented. As in any other organisation corporate entrepreneurship processes explain how entrepreneurship is implemented and diffused throughout a university, and its members must perceive the internal organisational culture as innovation supporting for entrepreneurship to flourish. Hence, the importance of studying internal environmental conditions that influence / enable corporate entrepreneurship. This study investigated NMMU’s entrepreneurial orientation by first determining what an entrepreneurial university is and its key attributes. Next it identified the key structural factors influencing university entrepreneurship and enquired how these structural factors can be influenced to enhance entrepreneurship at NMMU. To this end, survey method was used to sample perception of the university middle managers. The study first determined the level of entrepreneurship in NMMU by measuring its entrepreneurial intensity and then attempted to locate its position on the entrepreneurial grid. Next the level of the university’s internal environmental support for entrepreneurship was determined. The university’s culture was found to be the key factor influencing entrepreneurship with time availability and work discretion as key internal factors through which NMMU’s entrepreneurial culture could be improved. Proactivity and frequency dimensions of entrepreneurship were found to lead to significant improvement in the university’s entrepreneurial output and based on the outcome of the study; suggestions were made on ways of incorporating findings to better improve entrepreneurial orientation.
- Full Text:
- Date Issued: 2014
- Authors: Fadairo, Feyisara Olufunmilayo
- Date: 2014
- Subjects: Entrepreneurship -- South Africa , University-based new business enterprises -- South Africa , Nelson Mandela Metropolitan University
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:9348 , http://hdl.handle.net/10948/d1020293
- Description: In the knowledge world into which mankind has progressed, universities are engines of economic growth. Their role has changed from producers of labour force to equal contributors - along with government and industry- in regional and national economic and social growth and development. Universities that will survive and succeed in this new climate must embrace entrepreneurship - become entrepreneurially oriented. As in any other organisation corporate entrepreneurship processes explain how entrepreneurship is implemented and diffused throughout a university, and its members must perceive the internal organisational culture as innovation supporting for entrepreneurship to flourish. Hence, the importance of studying internal environmental conditions that influence / enable corporate entrepreneurship. This study investigated NMMU’s entrepreneurial orientation by first determining what an entrepreneurial university is and its key attributes. Next it identified the key structural factors influencing university entrepreneurship and enquired how these structural factors can be influenced to enhance entrepreneurship at NMMU. To this end, survey method was used to sample perception of the university middle managers. The study first determined the level of entrepreneurship in NMMU by measuring its entrepreneurial intensity and then attempted to locate its position on the entrepreneurial grid. Next the level of the university’s internal environmental support for entrepreneurship was determined. The university’s culture was found to be the key factor influencing entrepreneurship with time availability and work discretion as key internal factors through which NMMU’s entrepreneurial culture could be improved. Proactivity and frequency dimensions of entrepreneurship were found to lead to significant improvement in the university’s entrepreneurial output and based on the outcome of the study; suggestions were made on ways of incorporating findings to better improve entrepreneurial orientation.
- Full Text:
- Date Issued: 2014
Establishing a formulation design space for a generic clobetasol 17- propionate cream using the principles of quality by design
- Fauzee, Ayeshah Fateemah Beebee
- Authors: Fauzee, Ayeshah Fateemah Beebee
- Date: 2014
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:20983 , http://hdl.handle.net/10962/5868
- Description: The pharmaceutical industry is global, is highly regulated and is able to achieve reasonable product quality but at high cost with maximum effort. Numerous challenges face the pharmaceutical industry and include a shrinking research pipeline, less innovation, outsourcing, investments, increasing research and development costs, long approval times, growth of the generic industry, failure to understand or analyze manufacturing failure and wastage as high at fifty percent for some pharmaceutical products. An efficient and flexible pharmaceutical sector should be able to consistently produce high quality pharmaceutical products at a reduced cost with minimal waste. As a result, Food and Drug Administration (FDA) and other agencies such as the International Conference on Harmonization (ICH) have embraced a “Quality by Design” (QbD) paradigm and this has become the “desired state” so as to shift manufacturing from being empirical to a science, engineering, and risk based approach. QbD is a systematic approach for the development of high quality pharmaceutical dosage forms that begins with predefined objectives based on the premise that quality must be built into and not tested into a product. QbD together with the establishment of a design space for dosage forms is a fairly new concept and there is limited published data on QbD concepts that report the entire process of identifying Critical Quality Attributes (CQA), design of a formulation and manufacturing process to meet product CQA, understanding the impact of material attributes and process parameters on product CQA, identification and controlling sources of variability in materials and processes that affect the CQA of a product and finally establishing, evaluating and testing a design space using both in vitro and in vivo approaches to assure that a product of consistent quality can always be produced. The objective of these studies was to implement a QbD approach to establish a design space for the development and manufacture of a safe, effective, stable generic formulation containing 0.05% w/w clobetasol 17-propionate (CP) that had similar in vitro and in vivo characteristics to an innovator product, Dermovate® (Sekpharma® Pty Ltd, Sandton, Gauteng, RSA). Such a product would pose a minimal risk of failure when treating severe skin disorders such as seborrhoeic dermatitis, extreme photodermatitis and/or severe psoriasis in HIV/AIDS patients in Southern Africa.
- Full Text:
- Date Issued: 2014
- Authors: Fauzee, Ayeshah Fateemah Beebee
- Date: 2014
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:20983 , http://hdl.handle.net/10962/5868
- Description: The pharmaceutical industry is global, is highly regulated and is able to achieve reasonable product quality but at high cost with maximum effort. Numerous challenges face the pharmaceutical industry and include a shrinking research pipeline, less innovation, outsourcing, investments, increasing research and development costs, long approval times, growth of the generic industry, failure to understand or analyze manufacturing failure and wastage as high at fifty percent for some pharmaceutical products. An efficient and flexible pharmaceutical sector should be able to consistently produce high quality pharmaceutical products at a reduced cost with minimal waste. As a result, Food and Drug Administration (FDA) and other agencies such as the International Conference on Harmonization (ICH) have embraced a “Quality by Design” (QbD) paradigm and this has become the “desired state” so as to shift manufacturing from being empirical to a science, engineering, and risk based approach. QbD is a systematic approach for the development of high quality pharmaceutical dosage forms that begins with predefined objectives based on the premise that quality must be built into and not tested into a product. QbD together with the establishment of a design space for dosage forms is a fairly new concept and there is limited published data on QbD concepts that report the entire process of identifying Critical Quality Attributes (CQA), design of a formulation and manufacturing process to meet product CQA, understanding the impact of material attributes and process parameters on product CQA, identification and controlling sources of variability in materials and processes that affect the CQA of a product and finally establishing, evaluating and testing a design space using both in vitro and in vivo approaches to assure that a product of consistent quality can always be produced. The objective of these studies was to implement a QbD approach to establish a design space for the development and manufacture of a safe, effective, stable generic formulation containing 0.05% w/w clobetasol 17-propionate (CP) that had similar in vitro and in vivo characteristics to an innovator product, Dermovate® (Sekpharma® Pty Ltd, Sandton, Gauteng, RSA). Such a product would pose a minimal risk of failure when treating severe skin disorders such as seborrhoeic dermatitis, extreme photodermatitis and/or severe psoriasis in HIV/AIDS patients in Southern Africa.
- Full Text:
- Date Issued: 2014
Establishing perceptions of an entrepreneur using word associations
- Authors: Goliath, Jasmine Estonia
- Date: 2014
- Subjects: Entrepreneurship -- South Africa , Economic development -- South Africa , Businesspeople -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9321 , http://hdl.handle.net/10948/d1020785
- Description: Entrepreneurship as a source of economic growth and competitiveness as well as job creation and the advancement of social interests is well documented. Despite these important contributions to the economies of countries, a shortage of entrepreneurial activity exists across borders and specifically in developing countries such as South Africa. The purpose of this study was to determine the perception and image of an entrepreneur in the eyes of various stakeholders. The reasoning behind this was that if the image of an entrepreneur could be determined, one could establish whether the image positively or negatively influences entrepreneurial intentions as well as potential future entrepreneurial activity. More specifically, the primary objective was to identify the perception and image that potential entrepreneurs (students) and existing entrepreneurs (small business owners) have of an entrepreneur. In the body of knowledge or general literature on entrepreneurship, the most commonly discussed topics are the nature and importance of entrepreneurship, the attributes (personality traits, characteristics and skills) associated with an entrepreneur, various push and pull factors, various rewards and drawbacks of such a career and the challenges entrepreneurs face. It is these aspects of entrepreneurship that stakeholders will most likely have been exposed to, and that most possibly have influenced their perception and image of an entrepreneur. The aforementioned aspects provided an overview of the theoretical body of knowledge on which the perception and image of an entrepreneur is based. The present study adopted a qualitative research paradigm with a phenomenological approach to achieve the research objectives of the study. Within this context, the study made use of a qualitative method for data collection and a quantitative method for data analysis. As such, a mixed methods approach was adopted. More specifically, a qualitative dominant mixed research method was implemented. A continuous word association test, which is a projective technique, was adopted as the qualitative means of data collection. This test involved asking participants to recall the words that come to mind when presented with the word “entrepreneur”. This method was selected because of its ability to reveal both affective and cognitive associations with the concept “entrepreneur”. A quantitative summative (manifest) content analysis was used as the quantitative research method for analysing the data. The continuous word association test was conducted among three sample groups, namely students prior to commencing, and students after completing a module in entrepreneurship, and small business owners. Student and small business owner participants were asked to write down as many words or phrases as possible that came to mind when they thought of the word “entrepreneur”, which was the stimulus word, within a ten-minute period. These responses were then collated and coded by developing a coding framework based on brand image and entrepreneurship literature. In studies on brand image, the components of image are considered to be tristructured in nature, consisting of cognitive (what the individual knows), affective (how the individual feels) and holistic (overall symbolism, combination of affective and cognitive) evaluations. The words generated by the participants in this study were broadly coded according to these categories and further subcategorised by searching for themes within the broad categories, which was facilitated and guided by an in-depth investigation of the entrepreneurship literature. The findings of this study show that the words generated by all three groups of participants were mostly of a cognitive nature, followed by words of a general or affective nature. As such, the vast majority of words generated by all three groups related to what the participants knew about an entrepreneur (cognitive) versus how they felt about one (affective), and were grounded in the management or entrepreneurship literature. When comparing the top ten words most frequently associated with the term “entrepreneur” by the three groups of participants, the attribute risk-taker was the most frequently recalled word among all three groups. Students prior to undertaking the entrepreneurship module associated an entrepreneur with being creative and a risk-taker, having a business enterprise and being involved in the selling of goods and services. Students after completing the module in entrepreneurship associated an entrepreneur with being profit-orientated, a risk-taker, innovative and original, and being opportunistic. Small business owners, on the other hand, associated an entrepreneur with being a risk-taker, innovative and original, goal- and achievement-orientated and profit-orientated. The findings show that all groups of participants associated an entrepreneur principally with certain attributes rather than with learned skills and competencies, and that all groups had a more positive than negative image of an entrepreneur. It was also found that exposure to entrepreneurship literature has an influence on the perception and image that students have of an entrepreneur. Because the words recalled by students after completing the entrepreneurship module were more in line with those recalled by small business owners, than with those recalled by students before starting the module, it can be suggested that entrepreneurship literature contributes to a more realistic image of an entrepreneur among students. This study has contributed to the field of entrepreneurship research by adopting a qualitative dominant research paradigm in conjunction with quantitative research methods to explore the complexity of the term “entrepreneur”. Furthermore, this study has been able to establish how individuals feel about entrepreneurship, in terms of being either positive or negative, by adding an affective aspect to the cognitive aspect of entrepreneurial decision-making. By conducting a continuous word association test among students prior to beginning and after completing a module in entrepreneurship, the entrepreneurial knowledge of students before being exposed to entrepreneurship literature was established, and subsequently the effectiveness of the entrepreneurship module determined. It is hoped that the findings of this study have added value to the entrepreneurship body of knowledge and can be used in future studies as a tool to address the problem of low entrepreneurial intention and activity among South Africans. Furthermore, it is hoped that by creating a positive image of an entrepreneur, entrepreneurship as a desirable career choice can be promoted and an entrepreneurial culture developed within communities and broader society.
- Full Text:
- Date Issued: 2014
- Authors: Goliath, Jasmine Estonia
- Date: 2014
- Subjects: Entrepreneurship -- South Africa , Economic development -- South Africa , Businesspeople -- South Africa
- Language: English
- Type: Thesis , Masters , MCom
- Identifier: vital:9321 , http://hdl.handle.net/10948/d1020785
- Description: Entrepreneurship as a source of economic growth and competitiveness as well as job creation and the advancement of social interests is well documented. Despite these important contributions to the economies of countries, a shortage of entrepreneurial activity exists across borders and specifically in developing countries such as South Africa. The purpose of this study was to determine the perception and image of an entrepreneur in the eyes of various stakeholders. The reasoning behind this was that if the image of an entrepreneur could be determined, one could establish whether the image positively or negatively influences entrepreneurial intentions as well as potential future entrepreneurial activity. More specifically, the primary objective was to identify the perception and image that potential entrepreneurs (students) and existing entrepreneurs (small business owners) have of an entrepreneur. In the body of knowledge or general literature on entrepreneurship, the most commonly discussed topics are the nature and importance of entrepreneurship, the attributes (personality traits, characteristics and skills) associated with an entrepreneur, various push and pull factors, various rewards and drawbacks of such a career and the challenges entrepreneurs face. It is these aspects of entrepreneurship that stakeholders will most likely have been exposed to, and that most possibly have influenced their perception and image of an entrepreneur. The aforementioned aspects provided an overview of the theoretical body of knowledge on which the perception and image of an entrepreneur is based. The present study adopted a qualitative research paradigm with a phenomenological approach to achieve the research objectives of the study. Within this context, the study made use of a qualitative method for data collection and a quantitative method for data analysis. As such, a mixed methods approach was adopted. More specifically, a qualitative dominant mixed research method was implemented. A continuous word association test, which is a projective technique, was adopted as the qualitative means of data collection. This test involved asking participants to recall the words that come to mind when presented with the word “entrepreneur”. This method was selected because of its ability to reveal both affective and cognitive associations with the concept “entrepreneur”. A quantitative summative (manifest) content analysis was used as the quantitative research method for analysing the data. The continuous word association test was conducted among three sample groups, namely students prior to commencing, and students after completing a module in entrepreneurship, and small business owners. Student and small business owner participants were asked to write down as many words or phrases as possible that came to mind when they thought of the word “entrepreneur”, which was the stimulus word, within a ten-minute period. These responses were then collated and coded by developing a coding framework based on brand image and entrepreneurship literature. In studies on brand image, the components of image are considered to be tristructured in nature, consisting of cognitive (what the individual knows), affective (how the individual feels) and holistic (overall symbolism, combination of affective and cognitive) evaluations. The words generated by the participants in this study were broadly coded according to these categories and further subcategorised by searching for themes within the broad categories, which was facilitated and guided by an in-depth investigation of the entrepreneurship literature. The findings of this study show that the words generated by all three groups of participants were mostly of a cognitive nature, followed by words of a general or affective nature. As such, the vast majority of words generated by all three groups related to what the participants knew about an entrepreneur (cognitive) versus how they felt about one (affective), and were grounded in the management or entrepreneurship literature. When comparing the top ten words most frequently associated with the term “entrepreneur” by the three groups of participants, the attribute risk-taker was the most frequently recalled word among all three groups. Students prior to undertaking the entrepreneurship module associated an entrepreneur with being creative and a risk-taker, having a business enterprise and being involved in the selling of goods and services. Students after completing the module in entrepreneurship associated an entrepreneur with being profit-orientated, a risk-taker, innovative and original, and being opportunistic. Small business owners, on the other hand, associated an entrepreneur with being a risk-taker, innovative and original, goal- and achievement-orientated and profit-orientated. The findings show that all groups of participants associated an entrepreneur principally with certain attributes rather than with learned skills and competencies, and that all groups had a more positive than negative image of an entrepreneur. It was also found that exposure to entrepreneurship literature has an influence on the perception and image that students have of an entrepreneur. Because the words recalled by students after completing the entrepreneurship module were more in line with those recalled by small business owners, than with those recalled by students before starting the module, it can be suggested that entrepreneurship literature contributes to a more realistic image of an entrepreneur among students. This study has contributed to the field of entrepreneurship research by adopting a qualitative dominant research paradigm in conjunction with quantitative research methods to explore the complexity of the term “entrepreneur”. Furthermore, this study has been able to establish how individuals feel about entrepreneurship, in terms of being either positive or negative, by adding an affective aspect to the cognitive aspect of entrepreneurial decision-making. By conducting a continuous word association test among students prior to beginning and after completing a module in entrepreneurship, the entrepreneurial knowledge of students before being exposed to entrepreneurship literature was established, and subsequently the effectiveness of the entrepreneurship module determined. It is hoped that the findings of this study have added value to the entrepreneurship body of knowledge and can be used in future studies as a tool to address the problem of low entrepreneurial intention and activity among South Africans. Furthermore, it is hoped that by creating a positive image of an entrepreneur, entrepreneurship as a desirable career choice can be promoted and an entrepreneurial culture developed within communities and broader society.
- Full Text:
- Date Issued: 2014
Ethanol production from lignocellulosic sugarcane leaves and tops
- Authors: Dodo, Charlie Marembu
- Date: 2014
- Subjects: Biomass energy , Ethanol as fuel , Lignocellulose
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11347 , http://hdl.handle.net/10353/d1019839 , Biomass energy , Ethanol as fuel , Lignocellulose
- Description: Various methods for the production of bioethanol using different feedstocks have been researched on. In most work on bioethanol synthesis from sugar cane, tops and leaves have been regarded as waste and generally removed and thrown away. In this work, lignocellulosic sugarcane leaves and tops were not discarded but instead used as biomass to evaluate their hydrolyzate content. The leaves and tops were hydrolysed using different methods, namely concentrated acid, dilute acid pre-treatment with subsequent enzyme hydrolysis and compared with a combination of oxidative alkali pretreatment and enzyme hydrolysis. Subsequent fermentation of the hydrolyzates into bioethanol was done using the yeast saccharomyces cerevisae. Acid hydrolysis has the problem of producing inhibitors, which have to be removed and this was done using overliming with calcium hydroxide and compared to sodium hydroxide neutralization. Oxidative alkali pre-treatment with enzyme hydrolysis gave the highest yields of fermentable sugars of 38% (g/g) using 7% (v/v) peroxide pre-treated biomass than 36% (g/g) for 5% (v/v) with the least inhibitors. Concentrated and dilute acid hydrolysis each gave yields of25% (g/g) and 22% (g/g) yields respectively although for acid a neutralization step was necessary and resulted in dilution. Alkaline neutralization of acid hydrolyzates using sodium hydroxide resulted in less dilution and loss of fermentable sugars as compared to overliming. Higher yields of bioethanol, 13.7 (g/l) were obtained from enzyme hydrolyzates than 6.9 (g/l) bioethanol from dilute acid hydrolyzates. There was more bioethanol yield 13.7 (g/l) after 72h of fermentation with the yeast than 7.0 (g/l) bioethanol after 24h. However, the longer fermentation period diminishes the value of the increase in yield by lowering the efficiency of the process.
- Full Text:
- Date Issued: 2014
- Authors: Dodo, Charlie Marembu
- Date: 2014
- Subjects: Biomass energy , Ethanol as fuel , Lignocellulose
- Language: English
- Type: Thesis , Masters , MSc (Chemistry)
- Identifier: vital:11347 , http://hdl.handle.net/10353/d1019839 , Biomass energy , Ethanol as fuel , Lignocellulose
- Description: Various methods for the production of bioethanol using different feedstocks have been researched on. In most work on bioethanol synthesis from sugar cane, tops and leaves have been regarded as waste and generally removed and thrown away. In this work, lignocellulosic sugarcane leaves and tops were not discarded but instead used as biomass to evaluate their hydrolyzate content. The leaves and tops were hydrolysed using different methods, namely concentrated acid, dilute acid pre-treatment with subsequent enzyme hydrolysis and compared with a combination of oxidative alkali pretreatment and enzyme hydrolysis. Subsequent fermentation of the hydrolyzates into bioethanol was done using the yeast saccharomyces cerevisae. Acid hydrolysis has the problem of producing inhibitors, which have to be removed and this was done using overliming with calcium hydroxide and compared to sodium hydroxide neutralization. Oxidative alkali pre-treatment with enzyme hydrolysis gave the highest yields of fermentable sugars of 38% (g/g) using 7% (v/v) peroxide pre-treated biomass than 36% (g/g) for 5% (v/v) with the least inhibitors. Concentrated and dilute acid hydrolysis each gave yields of25% (g/g) and 22% (g/g) yields respectively although for acid a neutralization step was necessary and resulted in dilution. Alkaline neutralization of acid hydrolyzates using sodium hydroxide resulted in less dilution and loss of fermentable sugars as compared to overliming. Higher yields of bioethanol, 13.7 (g/l) were obtained from enzyme hydrolyzates than 6.9 (g/l) bioethanol from dilute acid hydrolyzates. There was more bioethanol yield 13.7 (g/l) after 72h of fermentation with the yeast than 7.0 (g/l) bioethanol after 24h. However, the longer fermentation period diminishes the value of the increase in yield by lowering the efficiency of the process.
- Full Text:
- Date Issued: 2014
Evaluating audience responses to promotional messages
- Authors: Bezuidenhout, Sonja
- Date: 2014
- Subjects: Branding (Marketing) , Content analysis (Communication) , Public relations
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8480 , http://hdl.handle.net/10948/d1020280
- Description: This study explored the guidelines advocated by selected media content analysis with the aim of identifying effective approaches to evaluate audience responses to promotional messages. Drawing from literature and documented deliberations by industry professionals, content-specific analysis protocols were applied and tested using a case study representing topic-specific responses to the Two Oceans Quay 5 product launch. In doing so, a logical observation of the communication in unpaid media placements and relevant discussions distributed in public media channels was completed. It is in this sense that this research enriches the study of public relations with a particular focus on output-driven evaluation. It provides insights into qualitative and quantitative publicity measurement and suggests how these methods can be useful to explicate the impact of media coverage as a public relations element. While it largely focused on discovering improved media content analysis solutions, this study revealed that content-driven analysis can only be useful when its protocols are aligned with the context of the data and if communication practitioners remain aware and transparent of its subjectivity. In this regard, this study helps to generate an understanding of the subjective dynamic of public relations and the importance of in-depth and adaptable publicity assessments to help distinguish public relations as a purposeful branding function next to advertising and marketing.
- Full Text:
- Date Issued: 2014
- Authors: Bezuidenhout, Sonja
- Date: 2014
- Subjects: Branding (Marketing) , Content analysis (Communication) , Public relations
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:8480 , http://hdl.handle.net/10948/d1020280
- Description: This study explored the guidelines advocated by selected media content analysis with the aim of identifying effective approaches to evaluate audience responses to promotional messages. Drawing from literature and documented deliberations by industry professionals, content-specific analysis protocols were applied and tested using a case study representing topic-specific responses to the Two Oceans Quay 5 product launch. In doing so, a logical observation of the communication in unpaid media placements and relevant discussions distributed in public media channels was completed. It is in this sense that this research enriches the study of public relations with a particular focus on output-driven evaluation. It provides insights into qualitative and quantitative publicity measurement and suggests how these methods can be useful to explicate the impact of media coverage as a public relations element. While it largely focused on discovering improved media content analysis solutions, this study revealed that content-driven analysis can only be useful when its protocols are aligned with the context of the data and if communication practitioners remain aware and transparent of its subjectivity. In this regard, this study helps to generate an understanding of the subjective dynamic of public relations and the importance of in-depth and adaptable publicity assessments to help distinguish public relations as a purposeful branding function next to advertising and marketing.
- Full Text:
- Date Issued: 2014
Evaluating recruitment practices at the auditor general of South Africa
- Authors: Snyders, Curtis
- Date: 2014
- Subjects: Employees -- Recruiting -- South Africa , Employee selection -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8932 , http://hdl.handle.net/10948/d1021189
- Description: This research study evaluated recruitment practices at the Auditor-General of South Africa (AGSA). The AGSA recruit highly skilled talented individuals in a country with a problem with a shortage of skills. Recruitment at the organisation is therefore an important function and key to the success of the AGSA. There is no clear indication that the AGSA, when filling vacancies, should recruit from its internal resources or recruit externally. This research looked to establish an ideal ratio between the recruitment from internal and external employees. To achieve the objectives, a literature review was conducted to determine the various combinations of recruitment. The literature was divided into talent management, internal and external recruitment, as well as succession management. The research took the form of a case study, looking at recruitment practices within the AGSA. A questionnaire was developed to gather information from employees in the AGSA, around their assessment of recruitment and their opinion on internal and external recruitment. The questionnaire was distributed online and various levels of employees within the organisation participated in responding to the questionnaire. The most recent recruitment reports were presented and analysed. Information was gathered from literature on recruitment and the AGSA employee’s by means of an online questionnaire. Recommendations were made to the AGSA taking into consideration the current practices within the organisation and the research undertaken for this dissertation.
- Full Text:
- Date Issued: 2014
- Authors: Snyders, Curtis
- Date: 2014
- Subjects: Employees -- Recruiting -- South Africa , Employee selection -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8932 , http://hdl.handle.net/10948/d1021189
- Description: This research study evaluated recruitment practices at the Auditor-General of South Africa (AGSA). The AGSA recruit highly skilled talented individuals in a country with a problem with a shortage of skills. Recruitment at the organisation is therefore an important function and key to the success of the AGSA. There is no clear indication that the AGSA, when filling vacancies, should recruit from its internal resources or recruit externally. This research looked to establish an ideal ratio between the recruitment from internal and external employees. To achieve the objectives, a literature review was conducted to determine the various combinations of recruitment. The literature was divided into talent management, internal and external recruitment, as well as succession management. The research took the form of a case study, looking at recruitment practices within the AGSA. A questionnaire was developed to gather information from employees in the AGSA, around their assessment of recruitment and their opinion on internal and external recruitment. The questionnaire was distributed online and various levels of employees within the organisation participated in responding to the questionnaire. The most recent recruitment reports were presented and analysed. Information was gathered from literature on recruitment and the AGSA employee’s by means of an online questionnaire. Recommendations were made to the AGSA taking into consideration the current practices within the organisation and the research undertaken for this dissertation.
- Full Text:
- Date Issued: 2014
Evaluating the beneficiary management process in housing delivery: a case study of Buffalo City Metropolitan Municipality in the Eastern Cape (2013)
- Authors: Matiwane, T
- Date: 2014
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11685 , http://hdl.handle.net/10353/d1013565
- Description: The study critically analysed the problems encountered in the housing delivery in the Buffalo City Metropolitan Municipality for the 2013 period. The purpose is to look at the factors that affect housing delivery in the area, focusing more especially at the management of the beneficiaries and the process thereof. Buffalo City Metropolitan Municipality is not immune to the housing problem hence the study was initiated. Respondents were selected from among others the housing beneficiary and the predominantly the staff of Buffalo City Metropolitan Municipality to respond to the questionnaires related to the beneficiary management. Permission was sought from the Municipality to conduct the research, after which the questionnaires were distributed to all sampled respondents accordingly in line with the objectives of the research. The researcher distributed the questionnaires and allowed a period of three weeks for the respondents to respond to them, after which the researcher collected all the questionnaires. The study revealed the great understanding of the housing delivery process by the housing recipients. Inclusive of the administrators, i.e. Buffalo City Metropolitan Municipality staff members, are fully aware of the expectations from the recipients and the process. The findings further indicates that there are serious challenges facing housing delivery in the province and the country at large. Hence the beneficiaries could not get their houses on time and the housing projects did not get completed within the scheduled period, this ends up delaying the delivery process.
- Full Text: false
- Date Issued: 2014
- Authors: Matiwane, T
- Date: 2014
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11685 , http://hdl.handle.net/10353/d1013565
- Description: The study critically analysed the problems encountered in the housing delivery in the Buffalo City Metropolitan Municipality for the 2013 period. The purpose is to look at the factors that affect housing delivery in the area, focusing more especially at the management of the beneficiaries and the process thereof. Buffalo City Metropolitan Municipality is not immune to the housing problem hence the study was initiated. Respondents were selected from among others the housing beneficiary and the predominantly the staff of Buffalo City Metropolitan Municipality to respond to the questionnaires related to the beneficiary management. Permission was sought from the Municipality to conduct the research, after which the questionnaires were distributed to all sampled respondents accordingly in line with the objectives of the research. The researcher distributed the questionnaires and allowed a period of three weeks for the respondents to respond to them, after which the researcher collected all the questionnaires. The study revealed the great understanding of the housing delivery process by the housing recipients. Inclusive of the administrators, i.e. Buffalo City Metropolitan Municipality staff members, are fully aware of the expectations from the recipients and the process. The findings further indicates that there are serious challenges facing housing delivery in the province and the country at large. Hence the beneficiaries could not get their houses on time and the housing projects did not get completed within the scheduled period, this ends up delaying the delivery process.
- Full Text: false
- Date Issued: 2014
Evaluating the effectiveness of talent management strategies in rural municipalities in the Eastern Cape
- Authors: Krexe, Owethu Mziwabantu
- Date: 2014
- Subjects: Civil service -- Personnel managementy -- South Africa -- Eastern Cape , Civil service -- Labor productivity -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/3215 , vital:20412
- Description: South Africa has three spheres of government, of which all are battling with the delivery of services to the population due to a number of challenges (Koketso and Rust, 2012). The local sphere of government was established in 1996 by the constitution of South Africa, for promoting social and economic development at municipal-based jurisdictions (Valeta and Walton, 2008). Pillay, Subban and Qwabe (2008) state that the South African public service lacks the skills required to perform their duties effectively and this is a key restraint. To emphasise this lack of skills, in an earlier study Meyer and Babb (2005) stated that management in the public sector is faced with a challenge of attracting employees with suitable skills for the job. Therefore, talent management has been identified as one of the strategies rural municipalities can use to improve performance. For this study, talent management is defined as a strategic process of attracting, recruiting, developing and retaining individuals who have the capability to make a significant difference to the current and future performance of the institution. The primary objective of the study was to evaluate the effectiveness of current talent management strategies used by rural municipalities and to provide these municipalities with a talent management model that can be of benefit to these institutions. This study analysed whether rural municipalities have talent management strategies and how effective those strategies were, by evaluating their current ways of attracting, developing and retaining their talent. A structured questionnaire was used as the measuring instrument. The study concluded by providing a talent model that could be used by rural municipalities.
- Full Text:
- Date Issued: 2014
- Authors: Krexe, Owethu Mziwabantu
- Date: 2014
- Subjects: Civil service -- Personnel managementy -- South Africa -- Eastern Cape , Civil service -- Labor productivity -- South Africa -- Eastern Cape , Municipal government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/3215 , vital:20412
- Description: South Africa has three spheres of government, of which all are battling with the delivery of services to the population due to a number of challenges (Koketso and Rust, 2012). The local sphere of government was established in 1996 by the constitution of South Africa, for promoting social and economic development at municipal-based jurisdictions (Valeta and Walton, 2008). Pillay, Subban and Qwabe (2008) state that the South African public service lacks the skills required to perform their duties effectively and this is a key restraint. To emphasise this lack of skills, in an earlier study Meyer and Babb (2005) stated that management in the public sector is faced with a challenge of attracting employees with suitable skills for the job. Therefore, talent management has been identified as one of the strategies rural municipalities can use to improve performance. For this study, talent management is defined as a strategic process of attracting, recruiting, developing and retaining individuals who have the capability to make a significant difference to the current and future performance of the institution. The primary objective of the study was to evaluate the effectiveness of current talent management strategies used by rural municipalities and to provide these municipalities with a talent management model that can be of benefit to these institutions. This study analysed whether rural municipalities have talent management strategies and how effective those strategies were, by evaluating their current ways of attracting, developing and retaining their talent. A structured questionnaire was used as the measuring instrument. The study concluded by providing a talent model that could be used by rural municipalities.
- Full Text:
- Date Issued: 2014
Evaluating the effectiveness of the performance management and development system in the Eastern Cape Liquor Board
- Authors: Tini, Linda Lindelwa
- Date: 2014
- Subjects: Performance -- Management , Employees -- Rating of -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8937 , http://hdl.handle.net/10948/d1021216
- Description: Research studies have reported that many organisations implement a performance management and development system. However, it is often not as effective as it is intended. Against this background, the purpose of this study was to evaluate the effectiveness of the performance management and development in the Eastern Cape Liquor Board (ECLB). The study emphasised the importance of an organisational culture that supports management of performance in order for the system to be effective. The study further highlighted that alignment between the performance of individuals and the organisation is critical as all efforts have to focus on the achievement of the organisational vision. The study also emphasised the importance of a process of determining key performance areas that is transparent and involves participation by all employees. The study further argued that the development and rewarding of employees for performance is crucial in ensuring an effective performance management system. The target population for this study consisted of ECLB employees including the district offices. The findings suggested that when the performance management and development system is not implemented in its entirety it cannot be effective. Furthermore, the findings revealed that ECLB implements some of the elements of the system correctly whilst other areas still require more attention.
- Full Text:
- Date Issued: 2014
- Authors: Tini, Linda Lindelwa
- Date: 2014
- Subjects: Performance -- Management , Employees -- Rating of -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8937 , http://hdl.handle.net/10948/d1021216
- Description: Research studies have reported that many organisations implement a performance management and development system. However, it is often not as effective as it is intended. Against this background, the purpose of this study was to evaluate the effectiveness of the performance management and development in the Eastern Cape Liquor Board (ECLB). The study emphasised the importance of an organisational culture that supports management of performance in order for the system to be effective. The study further highlighted that alignment between the performance of individuals and the organisation is critical as all efforts have to focus on the achievement of the organisational vision. The study also emphasised the importance of a process of determining key performance areas that is transparent and involves participation by all employees. The study further argued that the development and rewarding of employees for performance is crucial in ensuring an effective performance management system. The target population for this study consisted of ECLB employees including the district offices. The findings suggested that when the performance management and development system is not implemented in its entirety it cannot be effective. Furthermore, the findings revealed that ECLB implements some of the elements of the system correctly whilst other areas still require more attention.
- Full Text:
- Date Issued: 2014
Evaluating the implementation of the principles of good governance in Zimbabwe local government system : a case of Marondera local municipality
- Authors: Muswaka, Phyllis
- Date: 2014
- Subjects: Local government -- Zimbabwe Public administration -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/13068 , vital:39453
- Description: Participatory budgeting currently occupies centre stage in Public and Municipal financial management Acts. The principle of participatory budgeting ushers in a broader public forum in which crucial principles in Public financial management such as accountability and transparency are observed, thereby automatically ensuring effective governance. The efficacy of participatory budgeting is to improve service delivery through opening up structures that will combat the spread of mal administrative practices such as corruption and financial fraud whilst enhancing democratic participation and upholding the rule of law by fostering transparency and accountability and making the governments more responsive to the needs of the people. The main objective of this study is to explore the pernicious effects of having limited citizen participation in Public finance management. It seeks to examine whether the poor service delivery by local municipalities can be attributed to the lack of effective citizen participation. This will be done through assessing whether the seeds of participatory budgeting have led to the fruits of efficient and effective service delivery in the public sector both in theory and in practice at Nkonkobe local municipality. It has been discovered that the inability to provide effective service delivery is a complex challenge facing many municipalities in South Africa, and although such a situation has been co-determined by many other factors including financial restraints, the root cause of service delivery incapability’s can be traced back to weather the citizens are actually participating in the management of public finances through participatory budgeting or not. More often than not, the failure to accommodate the citizens in local government affairs has been the spark that has been responsible for setting alight strikes and service delivery protest marches in most of South Africa’s Provinces. However, due to this, this study aims to reveal that participatory budgeting is an ambitious issue that requires local authorities to focus on in order to improve service delivery through embracing active citizen participation. Recommendations as well as consequences of lack of citizen participation in the budget process were thereby highlighted.
- Full Text:
- Date Issued: 2014
- Authors: Muswaka, Phyllis
- Date: 2014
- Subjects: Local government -- Zimbabwe Public administration -- Zimbabwe
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: http://hdl.handle.net/10353/13068 , vital:39453
- Description: Participatory budgeting currently occupies centre stage in Public and Municipal financial management Acts. The principle of participatory budgeting ushers in a broader public forum in which crucial principles in Public financial management such as accountability and transparency are observed, thereby automatically ensuring effective governance. The efficacy of participatory budgeting is to improve service delivery through opening up structures that will combat the spread of mal administrative practices such as corruption and financial fraud whilst enhancing democratic participation and upholding the rule of law by fostering transparency and accountability and making the governments more responsive to the needs of the people. The main objective of this study is to explore the pernicious effects of having limited citizen participation in Public finance management. It seeks to examine whether the poor service delivery by local municipalities can be attributed to the lack of effective citizen participation. This will be done through assessing whether the seeds of participatory budgeting have led to the fruits of efficient and effective service delivery in the public sector both in theory and in practice at Nkonkobe local municipality. It has been discovered that the inability to provide effective service delivery is a complex challenge facing many municipalities in South Africa, and although such a situation has been co-determined by many other factors including financial restraints, the root cause of service delivery incapability’s can be traced back to weather the citizens are actually participating in the management of public finances through participatory budgeting or not. More often than not, the failure to accommodate the citizens in local government affairs has been the spark that has been responsible for setting alight strikes and service delivery protest marches in most of South Africa’s Provinces. However, due to this, this study aims to reveal that participatory budgeting is an ambitious issue that requires local authorities to focus on in order to improve service delivery through embracing active citizen participation. Recommendations as well as consequences of lack of citizen participation in the budget process were thereby highlighted.
- Full Text:
- Date Issued: 2014
Evaluating the post-implementation effectiveness of selected household water treatment technologies in rural Kenya
- Authors: Onabolu, Boluwaji
- Date: 2014
- Subjects: Water-supply, Rural -- Kenya , Sanitation, Rural -- Kenya , Sanitation, Household -- Kenya , Drinking water -- Purification -- Kenya , Drinking water -- Microbiology -- Kenya , Health behavior -- Kenya
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6045 , http://hdl.handle.net/10962/d1013145
- Description: Water, sanitation and hygiene-related diseases are responsible for 7% of all deaths and 8% of all disability adjusted live years (DALYs), as well as the loss of 320 million days of productivity in developing countries. Though laboratory and field trials have shown that household water treatment (HWT) technologies can quickly improve the microbiological quality of drinking water, questions remain about the effectiveness of these technologies under real-world conditions. Furthermore, the value that rural communities attach to HWT is unknown, and it is not clear why, in spite of the fact that rural African households need household water treatment (HWT) most, they are the least likely to use them. The primary objective of this multi-level study was to assess the post-implementation effectiveness of selected HWT technologies in the Nyanza and Western Provinces of Kenya. The study was carried out in the rainy season between March and May, 2011 using a mixed method approach. Evidence was collected in order to build a case of evidence of HWT effectiveness or ineffectiveness in a post-implementation context. A quasi-experimental design was used first to conduct a Knowledge, Attitudes and Practices (KAP) survey in 474 households in ten intervention and five control villages (Chapter 3). The survey assessed the context in which household water treatment was being used in the study villages to provide real-world information for assessing the effectiveness of the technologies. An interviewer-administered questionnaire elicited information about the water, sanitation and hygiene-related KAP of the study communities. A household water treatment (HWT) survey (Chapter 4) was carried out in the same study households and villages as the KAP study, using a semi-structured questionnaire to gather HWT adoption, compliance and sustained use-related information to provide insight into the perceived value the study households attach to HWT technologies, and their likelihood of adoption of and compliance with these technologies. The drinking water quality of 171 (one quarter of those surveyed during KAP) randomly selected households was determined and tracked from source to the point of use (Chapter 5). This provided insights into HWT effectiveness by highlighting the need for HWT (as indicated by source water quality) and the effect of the study households’ KAP on drinking water quality (as indicated by the stored water quality). Physico-chemical and microbiological water quality of the nineteen improved and unimproved sources used by the study households was determined, according to the World Health Organisation guidelines. The microbiological quality of 291 water samples in six intervention and five control villages was determined from source to the point-of-use (POU) using the WHO and Sphere Drinking Water Quality Guidelines. An observational study design was then used to assess the post-implementation effectiveness of the technologies used in 37 households in five intervention villages (Chapter 6). Three assessments were carried out to determine the changes in the microbiological quality of 107 drinking water samples before treatment (from collection container) and after treatment (from storage container) by the households. The criteria used to assess the performance of the technologies were microbial efficacy, robustness and performance in relation to sector standards. A Quantitative Microbial Risk Assessment (QMRA) was then carried out in the HWT effectiveness study households to assess the technologies’ ability to reduce the users’ exposure to and probability of infection with water-borne pathogens (Chapter 7). The KAP survey showed that the intervention and control communities did not differ significantly in 18 out of 20 socio-economic variables that could potentially be influenced by the structured manner of introducing HWT into the intervention villages. The majority of the intervention group (IG) and the control group (CG) were poor or very poor on the basis of household assets they owned. The predominant level of education for almost two-thirds of the IG and CG respondents was primary school (completed and non-completed). Though very few were unemployed in IG (8.07%) and CG (14.29%), the two groups of respondents were predominantly engaged in subsistence farming — a low income occupation. With regard to practices, both groups had inadequate access to water and sanitation with only one in two of the households in both IG and CG using improved water sources as their main drinking water source in the non-rainy season. One in ten households in both study groups possessed an improved sanitation facility, though the CG was significantly more likely to practice open defecation than the IG. The self-reported use of soap in both study groups was mainly for bathing and not for handwashing after faecal contact with adult or child faeces. Despite the study groups' knowledge about diarrhoea, both groups showed a disconnection between their knowledge about routes of contamination and barriers to contamination. The most frequent reason for not treating water was the perceived safety of rain water in both the IG and CG. , The HWT adoption survey revealed poor storage and water-handling practices in both IG and CG, and that very few respondents knew how to use the HWT technologies correctly: The IG and CG were similar in perceived value attached to household water treatment. All HWT technologies had a lower likelihood of adoption compared to the likelihood of compliance indicators in both IG and CG. The users’ perceptions about efficacy, time taken and ease of use of the HWT technologies lowered the perceived value attached to the technologies. The assessment of the drinking water quality used by the study communities indicated that the improved sources had a lower geometric mean E. coli and total coliform count than the unimproved sources. Both categories of sources were of poor microbiological quality and both exceeded the Sphere Project (2004) and the WHO (2008) guidelines for total coliforms and E. Coli respectively The study communities’ predominant drinking water sources, surface water and rainwater were faecally contaminated (geometric mean E. coli load of 388.1±30.45 and 38.9±22.35 cfu/100 ml respectively) and needed effective HWT. The improved sources were significantly more likely than the unimproved sources to have a higher proportion of samples that complied with the WHO drinking water guidelines at source, highlighting the importance of providing improved water sources. The lowest levels of faecal contamination were observed between the collection and storage points which coincided with the stage at which HWT is normally applied, suggesting an HWT effect on the water quality. All water sources had nitrate and turbidity levels that exceeded the WHO stipulated guidelines, while some of the improved and unimproved sources had higher than permissible levels of lead, manganese and aluminium. The water source category and the mouth type of the storage container were predictive of the stored water quality. The active treater households had a higher percentage of samples that complied with WHO water quality guidelines for E. coli than inactive treater households in both improved and unimproved source categories. In inactive treater households, 65% of storage container water samples from the improved sources complied with the WHO guidelines in comparison to 72% of the stored water samples in the active treater households. However the differences were not statistically significant. The HWT technologies did not attain sector standards of effective performance: in descending order, the mean log10 reduction in E. coli concentrations after treatment of water from unimproved sources was PUR (log₁₀ 2.0), ceramic filters (log₁₀ 1.57), Aquatab (log₁₀ 1.06) and Waterguard (log₁₀ 0.44). The mean log10 reduction in E. coli after treatment of water from improved sources was Aquatab (log₁₀ 2.3), Waterguard (log₁₀ 1.43), PUR (log₁₀ 0.94) and ceramic filters (log₁₀ 0.16). The HWT technologies reduced the user’s daily exposure to water-borne pathogens from both unimproved and improved drinking water sources. The mean difference in exposure after treatment of water from unimproved sources was ceramic filter (log₁₀ 2.1), Aquatab (log₁₀ 1.9), PUR (log₁₀ 1.5) and Waterguard (log₁₀ 0.9), in descending order. The mean probability of infection with water-borne pathogens (using E.coli as indicator) after consumption of treated water from both improved and unimproved sources was reduced in users of all the HWT technologies. The difference in reduction between technologies was not statistically significant. The study concluded that despite the apparent need for HWT, the study households’ inadequate knowledge, poor attitudes and unhygienic practices make it unlikely that they will use the technologies effectively to reduce microbial concentrations to the standards stipulated by accepted drinking water quality guidelines. The structured method of HWT promotion in the intervention villages had not resulted in more hygienic water and sanitation KAP in the IG compared to the CG, or significant differences in likelihood of adoption and compliance with the assessed HWT technologies. Despite attaching a high perceived value to HWT, insufficient knowledge about how to use the HWT technologies and user concerns about factors such as ease of use, accessibility and time to use will impact negatively on adoption and compliance with HWT, notwithstanding their efficacy during field trials. Even though external support had been withdrawn, the assessed HWT technologies were able improve the quality of household drinking water and reduce the exposure and risk of water-borne infections. However, the improvement in water quality and reduction in risk did not attain sector guidelines, highlighting the need to address the attitudes, practices and design criteria identified in this study which limit the adoption, compliance and effective use of these technologies. These findings have implications for HWT interventions, emphasising the need for practice-based behavioural support alongside technical support.
- Full Text:
- Date Issued: 2014
- Authors: Onabolu, Boluwaji
- Date: 2014
- Subjects: Water-supply, Rural -- Kenya , Sanitation, Rural -- Kenya , Sanitation, Household -- Kenya , Drinking water -- Purification -- Kenya , Drinking water -- Microbiology -- Kenya , Health behavior -- Kenya
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:6045 , http://hdl.handle.net/10962/d1013145
- Description: Water, sanitation and hygiene-related diseases are responsible for 7% of all deaths and 8% of all disability adjusted live years (DALYs), as well as the loss of 320 million days of productivity in developing countries. Though laboratory and field trials have shown that household water treatment (HWT) technologies can quickly improve the microbiological quality of drinking water, questions remain about the effectiveness of these technologies under real-world conditions. Furthermore, the value that rural communities attach to HWT is unknown, and it is not clear why, in spite of the fact that rural African households need household water treatment (HWT) most, they are the least likely to use them. The primary objective of this multi-level study was to assess the post-implementation effectiveness of selected HWT technologies in the Nyanza and Western Provinces of Kenya. The study was carried out in the rainy season between March and May, 2011 using a mixed method approach. Evidence was collected in order to build a case of evidence of HWT effectiveness or ineffectiveness in a post-implementation context. A quasi-experimental design was used first to conduct a Knowledge, Attitudes and Practices (KAP) survey in 474 households in ten intervention and five control villages (Chapter 3). The survey assessed the context in which household water treatment was being used in the study villages to provide real-world information for assessing the effectiveness of the technologies. An interviewer-administered questionnaire elicited information about the water, sanitation and hygiene-related KAP of the study communities. A household water treatment (HWT) survey (Chapter 4) was carried out in the same study households and villages as the KAP study, using a semi-structured questionnaire to gather HWT adoption, compliance and sustained use-related information to provide insight into the perceived value the study households attach to HWT technologies, and their likelihood of adoption of and compliance with these technologies. The drinking water quality of 171 (one quarter of those surveyed during KAP) randomly selected households was determined and tracked from source to the point of use (Chapter 5). This provided insights into HWT effectiveness by highlighting the need for HWT (as indicated by source water quality) and the effect of the study households’ KAP on drinking water quality (as indicated by the stored water quality). Physico-chemical and microbiological water quality of the nineteen improved and unimproved sources used by the study households was determined, according to the World Health Organisation guidelines. The microbiological quality of 291 water samples in six intervention and five control villages was determined from source to the point-of-use (POU) using the WHO and Sphere Drinking Water Quality Guidelines. An observational study design was then used to assess the post-implementation effectiveness of the technologies used in 37 households in five intervention villages (Chapter 6). Three assessments were carried out to determine the changes in the microbiological quality of 107 drinking water samples before treatment (from collection container) and after treatment (from storage container) by the households. The criteria used to assess the performance of the technologies were microbial efficacy, robustness and performance in relation to sector standards. A Quantitative Microbial Risk Assessment (QMRA) was then carried out in the HWT effectiveness study households to assess the technologies’ ability to reduce the users’ exposure to and probability of infection with water-borne pathogens (Chapter 7). The KAP survey showed that the intervention and control communities did not differ significantly in 18 out of 20 socio-economic variables that could potentially be influenced by the structured manner of introducing HWT into the intervention villages. The majority of the intervention group (IG) and the control group (CG) were poor or very poor on the basis of household assets they owned. The predominant level of education for almost two-thirds of the IG and CG respondents was primary school (completed and non-completed). Though very few were unemployed in IG (8.07%) and CG (14.29%), the two groups of respondents were predominantly engaged in subsistence farming — a low income occupation. With regard to practices, both groups had inadequate access to water and sanitation with only one in two of the households in both IG and CG using improved water sources as their main drinking water source in the non-rainy season. One in ten households in both study groups possessed an improved sanitation facility, though the CG was significantly more likely to practice open defecation than the IG. The self-reported use of soap in both study groups was mainly for bathing and not for handwashing after faecal contact with adult or child faeces. Despite the study groups' knowledge about diarrhoea, both groups showed a disconnection between their knowledge about routes of contamination and barriers to contamination. The most frequent reason for not treating water was the perceived safety of rain water in both the IG and CG. , The HWT adoption survey revealed poor storage and water-handling practices in both IG and CG, and that very few respondents knew how to use the HWT technologies correctly: The IG and CG were similar in perceived value attached to household water treatment. All HWT technologies had a lower likelihood of adoption compared to the likelihood of compliance indicators in both IG and CG. The users’ perceptions about efficacy, time taken and ease of use of the HWT technologies lowered the perceived value attached to the technologies. The assessment of the drinking water quality used by the study communities indicated that the improved sources had a lower geometric mean E. coli and total coliform count than the unimproved sources. Both categories of sources were of poor microbiological quality and both exceeded the Sphere Project (2004) and the WHO (2008) guidelines for total coliforms and E. Coli respectively The study communities’ predominant drinking water sources, surface water and rainwater were faecally contaminated (geometric mean E. coli load of 388.1±30.45 and 38.9±22.35 cfu/100 ml respectively) and needed effective HWT. The improved sources were significantly more likely than the unimproved sources to have a higher proportion of samples that complied with the WHO drinking water guidelines at source, highlighting the importance of providing improved water sources. The lowest levels of faecal contamination were observed between the collection and storage points which coincided with the stage at which HWT is normally applied, suggesting an HWT effect on the water quality. All water sources had nitrate and turbidity levels that exceeded the WHO stipulated guidelines, while some of the improved and unimproved sources had higher than permissible levels of lead, manganese and aluminium. The water source category and the mouth type of the storage container were predictive of the stored water quality. The active treater households had a higher percentage of samples that complied with WHO water quality guidelines for E. coli than inactive treater households in both improved and unimproved source categories. In inactive treater households, 65% of storage container water samples from the improved sources complied with the WHO guidelines in comparison to 72% of the stored water samples in the active treater households. However the differences were not statistically significant. The HWT technologies did not attain sector standards of effective performance: in descending order, the mean log10 reduction in E. coli concentrations after treatment of water from unimproved sources was PUR (log₁₀ 2.0), ceramic filters (log₁₀ 1.57), Aquatab (log₁₀ 1.06) and Waterguard (log₁₀ 0.44). The mean log10 reduction in E. coli after treatment of water from improved sources was Aquatab (log₁₀ 2.3), Waterguard (log₁₀ 1.43), PUR (log₁₀ 0.94) and ceramic filters (log₁₀ 0.16). The HWT technologies reduced the user’s daily exposure to water-borne pathogens from both unimproved and improved drinking water sources. The mean difference in exposure after treatment of water from unimproved sources was ceramic filter (log₁₀ 2.1), Aquatab (log₁₀ 1.9), PUR (log₁₀ 1.5) and Waterguard (log₁₀ 0.9), in descending order. The mean probability of infection with water-borne pathogens (using E.coli as indicator) after consumption of treated water from both improved and unimproved sources was reduced in users of all the HWT technologies. The difference in reduction between technologies was not statistically significant. The study concluded that despite the apparent need for HWT, the study households’ inadequate knowledge, poor attitudes and unhygienic practices make it unlikely that they will use the technologies effectively to reduce microbial concentrations to the standards stipulated by accepted drinking water quality guidelines. The structured method of HWT promotion in the intervention villages had not resulted in more hygienic water and sanitation KAP in the IG compared to the CG, or significant differences in likelihood of adoption and compliance with the assessed HWT technologies. Despite attaching a high perceived value to HWT, insufficient knowledge about how to use the HWT technologies and user concerns about factors such as ease of use, accessibility and time to use will impact negatively on adoption and compliance with HWT, notwithstanding their efficacy during field trials. Even though external support had been withdrawn, the assessed HWT technologies were able improve the quality of household drinking water and reduce the exposure and risk of water-borne infections. However, the improvement in water quality and reduction in risk did not attain sector guidelines, highlighting the need to address the attitudes, practices and design criteria identified in this study which limit the adoption, compliance and effective use of these technologies. These findings have implications for HWT interventions, emphasising the need for practice-based behavioural support alongside technical support.
- Full Text:
- Date Issued: 2014
Evaluation of some wastewater treatment facilities in Chris Hani and Amathole district municipalities as potential sources of Escherichia coli in the environment
- Authors: Mazwi, Sinazo Nomathamsanqa
- Date: 2014
- Subjects: Escherichia coli -- South Africa -- Eastern Cape , Water -- Purification
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11285 , http://hdl.handle.net/10353/d1019804 , Escherichia coli -- South Africa -- Eastern Cape , Water -- Purification
- Description: Access to clean and safe water is essential for the survival of human beings. Pollution of freshwater sources constitutes a major problem hindering access to safe water for drinking and other domestic uses. Wastewater effluent discharges often impact the microbiological qualities of surface waters with its attendant health and environmental problems. This study evaluated the microbiological qualities of the discharged effluents of four selected wastewater treatment plants in Amathole and Chris Hani District Municipalities of the Eastern Cape Province over a twelve-month sampling period. Microbiological analysis (faecal coliform, Escherichia coli and Escherichia coli O157:H7) was done using standard methods and polymerase chain reaction method was used to confirm identities ofbacterial isolates. Presumptive bacteria counts ranged as follows: faecal coliforms 0 to 1.6 × 103 CFU/100 ml, E. coli 0 to 1.4 × 103 CFU/100 ml and E. coli O157:H7 0 to 9.6 × 102 CFU/100 ml. Forty eight percent (305/626) of the presumptive E. coli isolates were confirmed using species-specific uidA gene which code for β-glucuronidase enzyme in E. coli. Antibiotic susceptibility profile of the isolate using a panel of 10 antibiotics shows 100% (150/150) resistance to antibiotics rifampicin and penicillin G while 49.3% (74/150) of the isolates and 46.7% (70/150) were susceptible to streptomycin and cefotaxime respectively. Multiple antibiotic resistance phenotypes (MARP) of the isolates showed resistance to two or more test antibiotics while the calculated multiple antibiotic resistance index (MARI) for the tested isolated is 0.49. The detection of potentially pathogenic E. coli in the final effluents suggestspotential danger to the receiving water bodies where the effluents are discharge. The high MARI valued obtained in this study indicates that the isolates are form environment where the tested antibiotics are being used and may further lead to the spread of multiple antibiotics resistance among other pathogens that may be present in the same environment.
- Full Text:
- Date Issued: 2014
- Authors: Mazwi, Sinazo Nomathamsanqa
- Date: 2014
- Subjects: Escherichia coli -- South Africa -- Eastern Cape , Water -- Purification
- Language: English
- Type: Thesis , Masters , MSc (Microbiology)
- Identifier: vital:11285 , http://hdl.handle.net/10353/d1019804 , Escherichia coli -- South Africa -- Eastern Cape , Water -- Purification
- Description: Access to clean and safe water is essential for the survival of human beings. Pollution of freshwater sources constitutes a major problem hindering access to safe water for drinking and other domestic uses. Wastewater effluent discharges often impact the microbiological qualities of surface waters with its attendant health and environmental problems. This study evaluated the microbiological qualities of the discharged effluents of four selected wastewater treatment plants in Amathole and Chris Hani District Municipalities of the Eastern Cape Province over a twelve-month sampling period. Microbiological analysis (faecal coliform, Escherichia coli and Escherichia coli O157:H7) was done using standard methods and polymerase chain reaction method was used to confirm identities ofbacterial isolates. Presumptive bacteria counts ranged as follows: faecal coliforms 0 to 1.6 × 103 CFU/100 ml, E. coli 0 to 1.4 × 103 CFU/100 ml and E. coli O157:H7 0 to 9.6 × 102 CFU/100 ml. Forty eight percent (305/626) of the presumptive E. coli isolates were confirmed using species-specific uidA gene which code for β-glucuronidase enzyme in E. coli. Antibiotic susceptibility profile of the isolate using a panel of 10 antibiotics shows 100% (150/150) resistance to antibiotics rifampicin and penicillin G while 49.3% (74/150) of the isolates and 46.7% (70/150) were susceptible to streptomycin and cefotaxime respectively. Multiple antibiotic resistance phenotypes (MARP) of the isolates showed resistance to two or more test antibiotics while the calculated multiple antibiotic resistance index (MARI) for the tested isolated is 0.49. The detection of potentially pathogenic E. coli in the final effluents suggestspotential danger to the receiving water bodies where the effluents are discharge. The high MARI valued obtained in this study indicates that the isolates are form environment where the tested antibiotics are being used and may further lead to the spread of multiple antibiotics resistance among other pathogens that may be present in the same environment.
- Full Text:
- Date Issued: 2014
Evaluation of supervisor performance at Transnet port terminals
- Authors: Ben-Mazwi, Amanda
- Date: 2014
- Subjects: Supervision of employees , Personnel management , Performance standards
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8935 , http://hdl.handle.net/10948/d1021200
- Description: The study is about evaluating supervisor performance at Transnet Port Terminals (TPT) and the impact it has in the business world in general. The aim of the study was to evaluate the quality of supervisors at Transnet Port Terminals (TPT) in the Eastern Cape. The sample size of 43 supervisors working at TPT from different departments like operations, planning, key accounts and procurement participated in the study. The sampled supervisors are between the ages of 20 and 59 years and was composed of females and predominantly males. The data was gathered through a questionnaire that was designed particularly to address the lack of quality of supervisory support at TPT. The response from respondents were tied to themes that were constructed, which are: (a) organisational goals; vision and management competencies; (b) communication; (c) performance cycle-setting of goals; (d) supervisor/supervisee performance conversation; and (e) supervisory development programme. The literature gathered and deliberated on in the literature review emanate from different authors in the form of books, journals and treatises. The empirical results were linked to theories gathered from different authors. Research findings were used to curb the issues identified, which will be beneficial to both TPT and its employees. The recommendations were submitted to the company to look at developing an in-house supervisory programme, capacity building internally and creating platforms for effective communication.
- Full Text:
- Date Issued: 2014
- Authors: Ben-Mazwi, Amanda
- Date: 2014
- Subjects: Supervision of employees , Personnel management , Performance standards
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8935 , http://hdl.handle.net/10948/d1021200
- Description: The study is about evaluating supervisor performance at Transnet Port Terminals (TPT) and the impact it has in the business world in general. The aim of the study was to evaluate the quality of supervisors at Transnet Port Terminals (TPT) in the Eastern Cape. The sample size of 43 supervisors working at TPT from different departments like operations, planning, key accounts and procurement participated in the study. The sampled supervisors are between the ages of 20 and 59 years and was composed of females and predominantly males. The data was gathered through a questionnaire that was designed particularly to address the lack of quality of supervisory support at TPT. The response from respondents were tied to themes that were constructed, which are: (a) organisational goals; vision and management competencies; (b) communication; (c) performance cycle-setting of goals; (d) supervisor/supervisee performance conversation; and (e) supervisory development programme. The literature gathered and deliberated on in the literature review emanate from different authors in the form of books, journals and treatises. The empirical results were linked to theories gathered from different authors. Research findings were used to curb the issues identified, which will be beneficial to both TPT and its employees. The recommendations were submitted to the company to look at developing an in-house supervisory programme, capacity building internally and creating platforms for effective communication.
- Full Text:
- Date Issued: 2014