Effects of the biocontrol agent, coelocephalapion camarae kissinger, galling on petiole tissues, plant growth and stored reserves in plant parts of two lantana camara L.(verbenaceae) varieties
- Authors: Kistensamy, Yoganambal
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3126 , vital:20372
- Description: The agent evaluated in this study, Coelocephalapion camarae Kissinger (Brentidae), a petiole galling apionid, was released against Lantana camara L. (Verbenaceae) in South Africa and has the potential to significantly contribute to the control of this noxious weed. An important aspect of evaluating the effectiveness of a biocontrol agent; include the understanding of the mechanism in which the biocontrol agent causes damage to the plant and the plant’s response to this damage. Another aspect that was considered in evaluating the effects of the apionid was the varietal differences that exist within the weedy L. camara complex. Larval feeding of C. camarae damaged the tissue in the petioles causing gall formation and this was quantified on two common South African L. camara varieties (017 and 018). Up to 100% of the vascular tissue (xylem and phloem) of effected petioles was eaten by larvae, 25 days after ovipostion in both the L. camara varieties, effectively severing the vascular connection from the leaves. The effect of feeding and galling by different population densities of C. camarae, on biomass and total soluble sugar and starch concentrations of different plant parts was measured on these two varieties during autumn, and compared to a similar study, done during summer. Relatively low galling percentages were achieved in the experiments of this study. Plant growth was less affected by apionid feeding at similar galling levels, as higher galling densities in these trials were similar to those at low exposures in trials by Baars (2002). The dry weights of all individual and combined plant parts for lantana variety 017 was less for both adult density exposures after 70 days compared to the weights of its controls, although not statistically significant at P>0.05 The opposite effect, though barely noticeable was recorded for lantana variety 018; here, the dry weights of individual plant parts and as whole plants weighed more in the plants exposed to both densities of weevil feeding and galling after 70 days, compared to its controls. Coelocephalapion camarae herbivory may thus be more effective in inflicting damage on some L. camara varieties compared to others. The effects of late season carbohydrate storage revealed that, from early- to mid-autumn starch concentrations increased significantly in stems of both L. camara varieties and L. camara var. 018 had larger starch reserves for winter. In L. camara var. 018 stems, starch increased 52 times and concentrations doubled in stems of L. camara var 017. The increase in the sugar and decrease in starch concentrations in leaves of plants of both varieties exposed to apionids in this study was attributed to a possible reduction of available nitrogen and phosphorus, due to apionid feeding, whilst starch was reallocated within the plants to stems and roots. The increase in starch concentrations in stems of plants that were exposed to apionids may have been expected, as compensation for herbivory has been associated with, increases in photosynthetic rates and the mobilization of stored resources. Herbivory by the apionid early in the growing season may be easily compensated for by L. camara as there are nutrient flushes experienced by plants that allows the maximum uptake of nutrients facilitating recovery, whereas later in the season plants suffer lower nutrient availability and don’t recover so readily. Both early and late in the season the accumulated effects of C. camarae feeding over time will undoubtedly decrease fitness of most lantana varieties.
- Full Text:
- Date Issued: 2016
- Authors: Kistensamy, Yoganambal
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3126 , vital:20372
- Description: The agent evaluated in this study, Coelocephalapion camarae Kissinger (Brentidae), a petiole galling apionid, was released against Lantana camara L. (Verbenaceae) in South Africa and has the potential to significantly contribute to the control of this noxious weed. An important aspect of evaluating the effectiveness of a biocontrol agent; include the understanding of the mechanism in which the biocontrol agent causes damage to the plant and the plant’s response to this damage. Another aspect that was considered in evaluating the effects of the apionid was the varietal differences that exist within the weedy L. camara complex. Larval feeding of C. camarae damaged the tissue in the petioles causing gall formation and this was quantified on two common South African L. camara varieties (017 and 018). Up to 100% of the vascular tissue (xylem and phloem) of effected petioles was eaten by larvae, 25 days after ovipostion in both the L. camara varieties, effectively severing the vascular connection from the leaves. The effect of feeding and galling by different population densities of C. camarae, on biomass and total soluble sugar and starch concentrations of different plant parts was measured on these two varieties during autumn, and compared to a similar study, done during summer. Relatively low galling percentages were achieved in the experiments of this study. Plant growth was less affected by apionid feeding at similar galling levels, as higher galling densities in these trials were similar to those at low exposures in trials by Baars (2002). The dry weights of all individual and combined plant parts for lantana variety 017 was less for both adult density exposures after 70 days compared to the weights of its controls, although not statistically significant at P>0.05 The opposite effect, though barely noticeable was recorded for lantana variety 018; here, the dry weights of individual plant parts and as whole plants weighed more in the plants exposed to both densities of weevil feeding and galling after 70 days, compared to its controls. Coelocephalapion camarae herbivory may thus be more effective in inflicting damage on some L. camara varieties compared to others. The effects of late season carbohydrate storage revealed that, from early- to mid-autumn starch concentrations increased significantly in stems of both L. camara varieties and L. camara var. 018 had larger starch reserves for winter. In L. camara var. 018 stems, starch increased 52 times and concentrations doubled in stems of L. camara var 017. The increase in the sugar and decrease in starch concentrations in leaves of plants of both varieties exposed to apionids in this study was attributed to a possible reduction of available nitrogen and phosphorus, due to apionid feeding, whilst starch was reallocated within the plants to stems and roots. The increase in starch concentrations in stems of plants that were exposed to apionids may have been expected, as compensation for herbivory has been associated with, increases in photosynthetic rates and the mobilization of stored resources. Herbivory by the apionid early in the growing season may be easily compensated for by L. camara as there are nutrient flushes experienced by plants that allows the maximum uptake of nutrients facilitating recovery, whereas later in the season plants suffer lower nutrient availability and don’t recover so readily. Both early and late in the season the accumulated effects of C. camarae feeding over time will undoubtedly decrease fitness of most lantana varieties.
- Full Text:
- Date Issued: 2016
Efficiency analysis of electricity distribution by South African Municipalities: a cost frontier approach
- Gqwaka, Aviwe Phelele Sebatian
- Authors: Gqwaka, Aviwe Phelele Sebatian
- Date: 2016
- Subjects: Electric power distribution -- South Africa Public utilities -- South Africa Local government -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/10299 , vital:26650
- Description: Efficiency analysis in the public sector assesses the performance of municipal and government entities in their provision of services to the public. South Africa, in particular, has experienced a large degree of negative feedback with respect to the ability of the government and its municipal departments to provide basic services to citizens. This has led to a number of service delivery protests throughout the country. To remedy this, the ability of the municipality to provide basic services needs to be assessed in order for improvements to be made. A first step in this process would be to determine the efficiency with which municipalities are providing these services. This study focuses on a particular municipal service, namely electricity distribution. Primarily, the efficiency with which municipalities provide electricity to consumers is determined. This is achieved using the parametric cost frontier approach, which is appropriate since municipalities aim to reduce the costs incurred in distributing electricity. The municipalities are compared to a frontier (theoretical best practice) from which inferences on their performances can be made. Those municipalities whose performances are not optimal, deviate from the frontier. The deviations (errors) are then assumed to be caused by two factors, namely stochastic random noise and inefficiency. This composition accounts for effects for which municipalities cannot control (stochastic random noise) and those for which it can (inefficiency). The parametric nature of the cost frontier approach allows for distributional assumptions to be made on these factors. Stochastic random noise is always assumed to be normally distributed, while inefficiency is assumed to be one-sided and positively skewed.
- Full Text:
- Date Issued: 2016
- Authors: Gqwaka, Aviwe Phelele Sebatian
- Date: 2016
- Subjects: Electric power distribution -- South Africa Public utilities -- South Africa Local government -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/10299 , vital:26650
- Description: Efficiency analysis in the public sector assesses the performance of municipal and government entities in their provision of services to the public. South Africa, in particular, has experienced a large degree of negative feedback with respect to the ability of the government and its municipal departments to provide basic services to citizens. This has led to a number of service delivery protests throughout the country. To remedy this, the ability of the municipality to provide basic services needs to be assessed in order for improvements to be made. A first step in this process would be to determine the efficiency with which municipalities are providing these services. This study focuses on a particular municipal service, namely electricity distribution. Primarily, the efficiency with which municipalities provide electricity to consumers is determined. This is achieved using the parametric cost frontier approach, which is appropriate since municipalities aim to reduce the costs incurred in distributing electricity. The municipalities are compared to a frontier (theoretical best practice) from which inferences on their performances can be made. Those municipalities whose performances are not optimal, deviate from the frontier. The deviations (errors) are then assumed to be caused by two factors, namely stochastic random noise and inefficiency. This composition accounts for effects for which municipalities cannot control (stochastic random noise) and those for which it can (inefficiency). The parametric nature of the cost frontier approach allows for distributional assumptions to be made on these factors. Stochastic random noise is always assumed to be normally distributed, while inefficiency is assumed to be one-sided and positively skewed.
- Full Text:
- Date Issued: 2016
Electrode surface modification using iron(II) phthalocyanine immobilized via electrografting and click chemistry and clicked onto azide-functionalized quantum dots: applications in electrocatalysis
- Authors: Nxele, Siphesihle Robin
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3464 , vital:20501
- Description: Tetrakis(5-hexynoxy)Fe(II) phthalocyanine was used alone and in combination with quantum dots (QDs) in order to test the electrocatalytic ability with hydrazine and paraquat as the analytes of interest. This novel phthalocaynine was successfully synthesised and characterized using various characterisation techniques. The QDs used were the well-known core-shell CdSe/ZnS nanostructures. The fabrication of glassy carbon electrodes involved covalent attachment by electrochemical grafting and click chemistry for the first part of the work and the second part involved the conjugation of the synthesised QDs and the phthalocyanine by click chemistry. This approach of conjugating these nanostructures introduced another aspect of novelty to the work reported in this thesis. The immobilisation of this conjugate on a glassy carbon electrode (GCE) was achieved by adsorption. Characterisation techniques such as infrared spectroscopy, x-ray diffractometry, UV/vis spectroscopy, transmission electron microscopy and x-ray photoelectron spectroscopy were used to characterise the molecules and conjugates of interest. With respect to the electrocatalytic part of the work, electrode surface characterisation involved scanning electrochemical microscopy and cyclic voltammetry to determine changes in the nature of the surface as well as reactivity of the surface at different modification steps. Detection limits and the sensitivity determined for the electrocatalysts fabricated here proved to be an improvement compared to other reported work involving phthalocyanines and the test analytes chosen for application. With respect to the conjugate, the electrocatalytic ability was improved when the QDs and phthalocyanine were combined using click chemistry compared to using the phthalocyanine alone.
- Full Text:
- Date Issued: 2016
- Authors: Nxele, Siphesihle Robin
- Date: 2016
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10962/3464 , vital:20501
- Description: Tetrakis(5-hexynoxy)Fe(II) phthalocyanine was used alone and in combination with quantum dots (QDs) in order to test the electrocatalytic ability with hydrazine and paraquat as the analytes of interest. This novel phthalocaynine was successfully synthesised and characterized using various characterisation techniques. The QDs used were the well-known core-shell CdSe/ZnS nanostructures. The fabrication of glassy carbon electrodes involved covalent attachment by electrochemical grafting and click chemistry for the first part of the work and the second part involved the conjugation of the synthesised QDs and the phthalocyanine by click chemistry. This approach of conjugating these nanostructures introduced another aspect of novelty to the work reported in this thesis. The immobilisation of this conjugate on a glassy carbon electrode (GCE) was achieved by adsorption. Characterisation techniques such as infrared spectroscopy, x-ray diffractometry, UV/vis spectroscopy, transmission electron microscopy and x-ray photoelectron spectroscopy were used to characterise the molecules and conjugates of interest. With respect to the electrocatalytic part of the work, electrode surface characterisation involved scanning electrochemical microscopy and cyclic voltammetry to determine changes in the nature of the surface as well as reactivity of the surface at different modification steps. Detection limits and the sensitivity determined for the electrocatalysts fabricated here proved to be an improvement compared to other reported work involving phthalocyanines and the test analytes chosen for application. With respect to the conjugate, the electrocatalytic ability was improved when the QDs and phthalocyanine were combined using click chemistry compared to using the phthalocyanine alone.
- Full Text:
- Date Issued: 2016
Embassy of the Federal Republic of Germany Pretoria
- Smith, Jan-Willem Christiaan
- Authors: Smith, Jan-Willem Christiaan
- Date: 2016
- Subjects: Embassy buildings -- South Africa -- Pretoria -- Design Architecture, Modern -- 21st century , Historic buildings -- South Africa --Pretoria
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/15400 , vital:28239
- Description: This treatise aims to demonstrate an understanding of the complexities involved in the design of a German Embassy in Pretoria, in terms of technicality and identity. Programmatic requirements will be considered, with an emphasis on creating the maximum level of security against any reasonable threat. The identity of the embassy will also be considered through the lens of a symbolic aesthetic that must be reconciled with the embassy’s physical and symbolic context. At a time of increasing cultural homogenisation and growing sameness within an ever more interconnected world, this treatise will explore the problem of creating a unique physical expression of German cultural and political identity. This aim exists in tension with the growing fluidity and porosity of cultural identity at the present moment, and the research herein therefore seeks to articulate a new vision of cultural identity that can coexist with globalisation without losing its own specificity. In essence, an attempt will be made to give a concrete expression to cultural identity and move beyond preconceptions of this idea.
- Full Text:
- Date Issued: 2016
- Authors: Smith, Jan-Willem Christiaan
- Date: 2016
- Subjects: Embassy buildings -- South Africa -- Pretoria -- Design Architecture, Modern -- 21st century , Historic buildings -- South Africa --Pretoria
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/15400 , vital:28239
- Description: This treatise aims to demonstrate an understanding of the complexities involved in the design of a German Embassy in Pretoria, in terms of technicality and identity. Programmatic requirements will be considered, with an emphasis on creating the maximum level of security against any reasonable threat. The identity of the embassy will also be considered through the lens of a symbolic aesthetic that must be reconciled with the embassy’s physical and symbolic context. At a time of increasing cultural homogenisation and growing sameness within an ever more interconnected world, this treatise will explore the problem of creating a unique physical expression of German cultural and political identity. This aim exists in tension with the growing fluidity and porosity of cultural identity at the present moment, and the research herein therefore seeks to articulate a new vision of cultural identity that can coexist with globalisation without losing its own specificity. In essence, an attempt will be made to give a concrete expression to cultural identity and move beyond preconceptions of this idea.
- Full Text:
- Date Issued: 2016
Employee engagement and staff retention in a motor manufacturing company in the Eastern Cape
- Authors: Sekalo,Siviwe
- Date: 2016
- Subjects: Employee retention -- South Africa -- Eastern Cape Motor industry -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/12757 , vital:27118
- Description: There is an overwhelming body of literature that exist in the subject of employee engagement. More and more studies are still conducted in this phenomenon as it had proved to produce high returns for organisations when mastered.The universal definition of this concept has not been found, various scholars continue to provide different views on how it should be defined. These definitions however bear common themes such as energy, taking initiative, going an extra mile, being grossly involved in the task, organisational citizenship, involvement, satisfaction, connection and enthusiasm which are caused by a feeling of being taken care of by the employer. It is clear from these that there is a reciprocal relationship between employer and employee which is claimed to have a link to profits and staff retention; as a result employers are increasingly devising strategies to engage the employees in order to reap the said benefits. The purpose of this study is to facilitate employee engagement and staff retention a motor manufacturing company in the Eastern Cape. In order to archive that the study assessed the level of engagement of artisans by means of a questionnaire focusing on factors such as meaningful work, organisational culture, social relationships, rewards and recognition and career development as these are repeatedly identified in the literature as key drivers of employee engagement. An imperial study was done on these drivers as well as on the existing company engagement programs to identify the employee’s perception of their effectiveness. The result of the study proves that artisans of this company are engaged and that all the drivers above were confirmed to have influence employee engagement and staff retention. The study however the study found that there is a split on the effectiveness of the existing engagement programs in the company with only less than 50% saying they were effective. A strong relationship was found to exist between all the factors that were studied and employee engagement and staff retention.
- Full Text:
- Date Issued: 2016
- Authors: Sekalo,Siviwe
- Date: 2016
- Subjects: Employee retention -- South Africa -- Eastern Cape Motor industry -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/12757 , vital:27118
- Description: There is an overwhelming body of literature that exist in the subject of employee engagement. More and more studies are still conducted in this phenomenon as it had proved to produce high returns for organisations when mastered.The universal definition of this concept has not been found, various scholars continue to provide different views on how it should be defined. These definitions however bear common themes such as energy, taking initiative, going an extra mile, being grossly involved in the task, organisational citizenship, involvement, satisfaction, connection and enthusiasm which are caused by a feeling of being taken care of by the employer. It is clear from these that there is a reciprocal relationship between employer and employee which is claimed to have a link to profits and staff retention; as a result employers are increasingly devising strategies to engage the employees in order to reap the said benefits. The purpose of this study is to facilitate employee engagement and staff retention a motor manufacturing company in the Eastern Cape. In order to archive that the study assessed the level of engagement of artisans by means of a questionnaire focusing on factors such as meaningful work, organisational culture, social relationships, rewards and recognition and career development as these are repeatedly identified in the literature as key drivers of employee engagement. An imperial study was done on these drivers as well as on the existing company engagement programs to identify the employee’s perception of their effectiveness. The result of the study proves that artisans of this company are engaged and that all the drivers above were confirmed to have influence employee engagement and staff retention. The study however the study found that there is a split on the effectiveness of the existing engagement programs in the company with only less than 50% saying they were effective. A strong relationship was found to exist between all the factors that were studied and employee engagement and staff retention.
- Full Text:
- Date Issued: 2016
Employee happiness in general motors
- Authors: Cooper, Julian
- Date: 2016
- Subjects: Job satisfaction -- South Africa , Corporate culture -- South Africa , Happiness -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/4365 , vital:20590
- Description: Happiness is essentially the degree to which you find and judge your existence as favourable, in addition to an enduring, psychological feeling of contentment. In the hedonic view, happiness is pleasant feelings and favourable judgements, while the contrasting eudaimonic view describes it as doing what is morally right, what is righteous, that will enhance growth and that is meaningful to an individual. Both these views contribute to the overall happiness of an individual. People that are pleased with their lives usually experience greater satisfaction in their jobs. This is in line with the literature as happiness is positively correlated with job satisfaction, which suggests that a happy employee will most likely result in one that is satisfied with his/her job. In addition, happiness is correlated with evidence of success in the workplace and can increase an employee’s effectiveness at work. It is, therefore, essential that organisations identify the factors which influence employee happiness in order to enhance its cultural value-offering for employees and, in turn, increase their levels of job satisfaction. Job satisfaction is essentially the degree to which a person enjoys his/her job. It is the positive emotional state resulting from the evaluation of one’s work experience. This has profitable outcomes such as improved work performance. Furthermore, people who experience satisfaction in their jobs are better ambassadors for their organisation, demonstrate greater commitment, are more engaged and perform better within the organisation than their unhappy peers. Job satisfaction can be deemed an attitude. It is therefore important to understand the dimensions of the job, which are complex and interrelated in nature, in order to understand job attitudes. Organisational culture has been shown to influence the attitude and behaviour of employees through shared values and beliefs in the organisation. It is for this reason that there is a significant need to determine the factors in organisational culture that influence employee happiness and, in turn, job satisfaction. An organisation’s employees, through their participation and commitment, can be regarded as the most important source of success for the organisation. Organisational culture can therefore, greatly influence the efficiency and effectiveness of an organisation through its employees. Moreover, the culture of an organisation has a significant influence on the commitment and satisfaction of its employees. It inspires employees not only to feel committed to the organisation but also to perform well. The correlation between organisational culture and job satisfaction have been examined by various authors in the literature. All of these authors found a positive relationship between the two concepts. These conclusions show that the culture of an organisation can actually influence an employee’s job satisfaction and therefore his/her happiness. This research investigates the cultural value-offering of General Motors South Africa (GMSA) and its alignment to the needs of its employees. Until the end of 2012, an employee needs-analysis regarding employee happiness and his/her job satisfaction, was non-existent in the organisation. Towards the end of 2012 the organisation introduced a “Workplace of Choice” survey to perform an employee needs-analysis in order to investigate if there was a difference between employee needs and the organisation’s cultural value-offering. Another “Workplace of Choice” survey followed in 2014. This, however, was performed with the staff employees only and not with the hourly employees. Many organisations neglect to analyse the workplace needs of their employees to ensure that the organisation fully understands and is able to satisfy or accommodate these needs. Understanding employee needs is crucial to an organisation’s success. It is therefore important that the organisation investigates the employee needs to be able to align them with the cultural value-offering of the organisation. The purpose of this study is to advance the current understanding of Employee Happiness in the workplace by conducting a systematic analysis of the factors in Organisational Culture that influence Employee Happiness and, in turn, their Job Satisfaction in GMSA.
- Full Text:
- Date Issued: 2016
- Authors: Cooper, Julian
- Date: 2016
- Subjects: Job satisfaction -- South Africa , Corporate culture -- South Africa , Happiness -- South Africa
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/4365 , vital:20590
- Description: Happiness is essentially the degree to which you find and judge your existence as favourable, in addition to an enduring, psychological feeling of contentment. In the hedonic view, happiness is pleasant feelings and favourable judgements, while the contrasting eudaimonic view describes it as doing what is morally right, what is righteous, that will enhance growth and that is meaningful to an individual. Both these views contribute to the overall happiness of an individual. People that are pleased with their lives usually experience greater satisfaction in their jobs. This is in line with the literature as happiness is positively correlated with job satisfaction, which suggests that a happy employee will most likely result in one that is satisfied with his/her job. In addition, happiness is correlated with evidence of success in the workplace and can increase an employee’s effectiveness at work. It is, therefore, essential that organisations identify the factors which influence employee happiness in order to enhance its cultural value-offering for employees and, in turn, increase their levels of job satisfaction. Job satisfaction is essentially the degree to which a person enjoys his/her job. It is the positive emotional state resulting from the evaluation of one’s work experience. This has profitable outcomes such as improved work performance. Furthermore, people who experience satisfaction in their jobs are better ambassadors for their organisation, demonstrate greater commitment, are more engaged and perform better within the organisation than their unhappy peers. Job satisfaction can be deemed an attitude. It is therefore important to understand the dimensions of the job, which are complex and interrelated in nature, in order to understand job attitudes. Organisational culture has been shown to influence the attitude and behaviour of employees through shared values and beliefs in the organisation. It is for this reason that there is a significant need to determine the factors in organisational culture that influence employee happiness and, in turn, job satisfaction. An organisation’s employees, through their participation and commitment, can be regarded as the most important source of success for the organisation. Organisational culture can therefore, greatly influence the efficiency and effectiveness of an organisation through its employees. Moreover, the culture of an organisation has a significant influence on the commitment and satisfaction of its employees. It inspires employees not only to feel committed to the organisation but also to perform well. The correlation between organisational culture and job satisfaction have been examined by various authors in the literature. All of these authors found a positive relationship between the two concepts. These conclusions show that the culture of an organisation can actually influence an employee’s job satisfaction and therefore his/her happiness. This research investigates the cultural value-offering of General Motors South Africa (GMSA) and its alignment to the needs of its employees. Until the end of 2012, an employee needs-analysis regarding employee happiness and his/her job satisfaction, was non-existent in the organisation. Towards the end of 2012 the organisation introduced a “Workplace of Choice” survey to perform an employee needs-analysis in order to investigate if there was a difference between employee needs and the organisation’s cultural value-offering. Another “Workplace of Choice” survey followed in 2014. This, however, was performed with the staff employees only and not with the hourly employees. Many organisations neglect to analyse the workplace needs of their employees to ensure that the organisation fully understands and is able to satisfy or accommodate these needs. Understanding employee needs is crucial to an organisation’s success. It is therefore important that the organisation investigates the employee needs to be able to align them with the cultural value-offering of the organisation. The purpose of this study is to advance the current understanding of Employee Happiness in the workplace by conducting a systematic analysis of the factors in Organisational Culture that influence Employee Happiness and, in turn, their Job Satisfaction in GMSA.
- Full Text:
- Date Issued: 2016
Enablers and barriers to involvement in commercialisation
- Authors: Chetty, Mary-Ann T
- Date: 2016
- Subjects: Commercialism , Entrepreneurship , Technology transfer
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/4720 , vital:20657
- Description: Universities are facing growing pressure to contribute towards innovation which has social impact and which contributes to economic development. Researchers mainly in the Science and Engineering fields are the primary sources of innovation outputs from universities and as such their involvement in commercialisation activities directly adds to the growth of innovative outputs from publicly financed research. Technology Transfer Offices (TTO) have been established at universities across South Africa to foster the involvement of researchers in commercialisation activities, to champion the innovation conversation within higher education institutions and to progress innovations from concept to application in society. This study focussed on understanding the factors which enable or create a barrier to the involvement of researchers in commercialisation activities at the Nelson Mandela Metropolitan University. The key elements examined in this study include the researchers’ perception of enablers (monetary and nonmonetary incentives) and barriers to involvement at national, institutional and individual levels. This study undertook to understand the perceptions of researchers of enablers and barriers to involvement in commercialisation at the Nelson Mandela Metropolitan University. Researchers in the two faculties of Science and Engineering, Built Environment and Information Technology were approached to anonymously complete an electronic survey, the questions for which were developed from literature. The results from the survey were analysed using descriptive statistics and hypothesis testing. This study finds that a combination of incentives is necessary to enable researcher involvement and to lower barriers to involvement in commercialisation research. A set of recommendations based on the study are put forward on how such recommendations can be implemented.
- Full Text:
- Date Issued: 2016
- Authors: Chetty, Mary-Ann T
- Date: 2016
- Subjects: Commercialism , Entrepreneurship , Technology transfer
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/4720 , vital:20657
- Description: Universities are facing growing pressure to contribute towards innovation which has social impact and which contributes to economic development. Researchers mainly in the Science and Engineering fields are the primary sources of innovation outputs from universities and as such their involvement in commercialisation activities directly adds to the growth of innovative outputs from publicly financed research. Technology Transfer Offices (TTO) have been established at universities across South Africa to foster the involvement of researchers in commercialisation activities, to champion the innovation conversation within higher education institutions and to progress innovations from concept to application in society. This study focussed on understanding the factors which enable or create a barrier to the involvement of researchers in commercialisation activities at the Nelson Mandela Metropolitan University. The key elements examined in this study include the researchers’ perception of enablers (monetary and nonmonetary incentives) and barriers to involvement at national, institutional and individual levels. This study undertook to understand the perceptions of researchers of enablers and barriers to involvement in commercialisation at the Nelson Mandela Metropolitan University. Researchers in the two faculties of Science and Engineering, Built Environment and Information Technology were approached to anonymously complete an electronic survey, the questions for which were developed from literature. The results from the survey were analysed using descriptive statistics and hypothesis testing. This study finds that a combination of incentives is necessary to enable researcher involvement and to lower barriers to involvement in commercialisation research. A set of recommendations based on the study are put forward on how such recommendations can be implemented.
- Full Text:
- Date Issued: 2016
Energy management system for the diagnosis and control of an automatic guided vehicle
- Authors: Church, Stuart Michael
- Date: 2016
- Subjects: Automated guided vehicle systems , Mechatronics
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/4798 , vital:20681
- Description: With the increase in electronic equipment implemented in various systems, as well as the increase in calculating power that these devices offer, designers are being empowered to make use of this power in real-time systems to diagnose and protect the systems themselves. This reasoning is too compounded by the focus on efficiency and safety in the design of complex systems, as well as the increasing expense and sensitivity of the electronic components themselves. With this in mind, this dissertation aims at developing a comprehensive measurement, control and reaction system for the electrical diagnosis and ultimately optimisation of complex electrical and electronic systems. This system will serve as a real-time diagnosis tool, which will enable the real-time diagnosis of various components in an electro-mechanical system, which can then be interpreted to determine the working state of the various components. Another sphere of this project will involve the accurate monitoring of the battery status as well as actively balancing the series connected batteries. The focus on the batteries will seek to prolong the life of the batteries, while being able to squeeze as much capacity out of them. The initial design and testing will be based on an AGV system implemented at VWSA, however a main goal throughout the design process will be modularity, i.e. the ease of implementation of this system in other systems. The key technologies used in the development of this system will still comprise of the components used in the original AGV, however new prototype components sourced from Microcare are used for the battery management system, while current sensors directly connected to the PLC’s analog input ports will be used for the active monitoring of currents distributed through the AGV.
- Full Text:
- Date Issued: 2016
- Authors: Church, Stuart Michael
- Date: 2016
- Subjects: Automated guided vehicle systems , Mechatronics
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/4798 , vital:20681
- Description: With the increase in electronic equipment implemented in various systems, as well as the increase in calculating power that these devices offer, designers are being empowered to make use of this power in real-time systems to diagnose and protect the systems themselves. This reasoning is too compounded by the focus on efficiency and safety in the design of complex systems, as well as the increasing expense and sensitivity of the electronic components themselves. With this in mind, this dissertation aims at developing a comprehensive measurement, control and reaction system for the electrical diagnosis and ultimately optimisation of complex electrical and electronic systems. This system will serve as a real-time diagnosis tool, which will enable the real-time diagnosis of various components in an electro-mechanical system, which can then be interpreted to determine the working state of the various components. Another sphere of this project will involve the accurate monitoring of the battery status as well as actively balancing the series connected batteries. The focus on the batteries will seek to prolong the life of the batteries, while being able to squeeze as much capacity out of them. The initial design and testing will be based on an AGV system implemented at VWSA, however a main goal throughout the design process will be modularity, i.e. the ease of implementation of this system in other systems. The key technologies used in the development of this system will still comprise of the components used in the original AGV, however new prototype components sourced from Microcare are used for the battery management system, while current sensors directly connected to the PLC’s analog input ports will be used for the active monitoring of currents distributed through the AGV.
- Full Text:
- Date Issued: 2016
Engendering the meaningful use of electronic medical records: a South African perspective
- Chipfumbu, Colletor Tendeukai
- Authors: Chipfumbu, Colletor Tendeukai
- Date: 2016
- Subjects: Electronic records -- South Africa -- Management Information storage and retrieval systems -- Management , Medical records -- South Africa Medical records -- Data processing
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/18420 , vital:28635
- Description: Theoretically, the use of Electronic Medical Records (EMRs) holds promise of numerous benefits in healthcare provision, including improvement in continuity of care, quality of care and safety. However, in practice, there is evidence that the adoption of electronic medical records has been slow and where adopted, often lacks meaningful use. Thus there is a clear dichotomy between the ambitions for EMR use and the reality of EMR implementation. In the USA, a legislative approach was taken to turn around the situation. Other countries such as Canada and European countries have followed suit (in their own way) to address the adoption and meaningful use of electronic medical records. The South African e-Health strategy and the National Health Normative Standards Framework for Interoperability in eHealth in South Africa documents both recommend the adoption of EMRs. Much work has been done to establish a baseline for standards to ensure interoperability and data portability of healthcare applications and data. However, even with the increased focus on e-Health, South Africa remains excessively reliant on paper-based medical records. Where health information technologies have been adopted, there is lack of coordination between and within provinces, leading to a multitude of systems and vendors. Thus there is a lack of systematic adoption and meaningful use of EMRs in South Africa. The main objective of this research is to develop the components required to engender meaningful use of electronic medical records in the South African healthcare context. The main contributors are identified as EMR certification and consistent, proper use of certified EMRs. Literature review, a Delphi study and logical argumentation are used to develop the relevant components for the South African healthcare context. The benefits of EMRs can only be realized through systematic adoption and meaningful use of EMRs, thus this research contributes to providing a road map for engendering the meaningful use of EMRs with the ultimate aim of improving healthcare in the South African healthcare landscape.
- Full Text:
- Date Issued: 2016
- Authors: Chipfumbu, Colletor Tendeukai
- Date: 2016
- Subjects: Electronic records -- South Africa -- Management Information storage and retrieval systems -- Management , Medical records -- South Africa Medical records -- Data processing
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/18420 , vital:28635
- Description: Theoretically, the use of Electronic Medical Records (EMRs) holds promise of numerous benefits in healthcare provision, including improvement in continuity of care, quality of care and safety. However, in practice, there is evidence that the adoption of electronic medical records has been slow and where adopted, often lacks meaningful use. Thus there is a clear dichotomy between the ambitions for EMR use and the reality of EMR implementation. In the USA, a legislative approach was taken to turn around the situation. Other countries such as Canada and European countries have followed suit (in their own way) to address the adoption and meaningful use of electronic medical records. The South African e-Health strategy and the National Health Normative Standards Framework for Interoperability in eHealth in South Africa documents both recommend the adoption of EMRs. Much work has been done to establish a baseline for standards to ensure interoperability and data portability of healthcare applications and data. However, even with the increased focus on e-Health, South Africa remains excessively reliant on paper-based medical records. Where health information technologies have been adopted, there is lack of coordination between and within provinces, leading to a multitude of systems and vendors. Thus there is a lack of systematic adoption and meaningful use of EMRs in South Africa. The main objective of this research is to develop the components required to engender meaningful use of electronic medical records in the South African healthcare context. The main contributors are identified as EMR certification and consistent, proper use of certified EMRs. Literature review, a Delphi study and logical argumentation are used to develop the relevant components for the South African healthcare context. The benefits of EMRs can only be realized through systematic adoption and meaningful use of EMRs, thus this research contributes to providing a road map for engendering the meaningful use of EMRs with the ultimate aim of improving healthcare in the South African healthcare landscape.
- Full Text:
- Date Issued: 2016
Enhancing clinical preparedness of basic midwifery students: perceptions of midwifery educators
- Authors: Vuso, Virginia Zanyiwe
- Date: 2016
- Subjects: Midwifery -- Study and teaching Childbirth -- Study and teaching -- South Africa Nursing -- Study and teaching
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: http://hdl.handle.net/10948/13204 , vital:27161
- Description: Since the inception of the student supernumerary status, both globally and in South Africa, nursing and midwifery educators have been concerned about the clinical competencies of their students. Student clinical competency levels in South Africa are critical to midwifery practice, especially as most litigation against the Department of Health in South Africa concerns negligence in midwifery practice. In addition, the litigations mostly involve newly qualified midwives, thus suggesting a link with practice competency levels. Several challenges exist in the academic and practice environments regarding student learning, practice and clinical preparedness. Lack of support during clinical placement and a lack of facilities for use during clinical practice modules are among these challenges. Some students, due to the challenges they face with clinical learning and practice, fail to meet the practical competencies for examination entry requirements. Consequently, some of these students have to repeat the year or exit the programme. The current study sought to identify how to assist midwifery educators in their activities to prepare students for clinical placement readiness. The first objective of the study was to explore and describe the perceptions of midwifery educators regarding the need for additional measures to enhance the clinical preparedness of basic midwifery students before they are allocated to the clinical areas. The second objective sought to make recommendations that would further assist the midwifery educators to clinically prepare midwifery students before being allocated and placed in different clinical areas. A qualitative, explorative, descriptive and contextual research design was used for the study and the study was conducted at a nursing college in the Eastern Cape Province from August 2014 to January 2016. The research population consisted of midwifery educators at a nursing college and a purposive sampling technique was used guided by set criteria. Data were collected using focus group interviews. Four focus groups were used making a total of 17 participants. The principles applied for data analysis were those of Tesch’s method of data analysis, which were used to develop the themes and sub-themes. An independent coder assisted with the coding of the data for the purposes of trustworthiness. In addition, Lincoln and Guba’s model of trustworthiness consisting of the criteria of credibility, transferability, dependability and conformability was used to confirm the validity of the study while the ethical principles adopted were informed consent, justice, non-maleficence, privacy and confidentiality. The study found that the participants perceived numerous challenges that hindered the clinical preparedness of their students. These related to increased workload, lack of support from management and a lack of commitment on the part of students towards their studies. The participants also identified inconsistencies in clinical practice between the clinical midwives and the educators, and even among the educators themselves. This lack of consistency in turn causes confusion among the students and thus impacts negatively on their clinical practice preparedness. Based on these findings recommendations for clinical nursing practice, nursing education and research were made.
- Full Text:
- Date Issued: 2016
- Authors: Vuso, Virginia Zanyiwe
- Date: 2016
- Subjects: Midwifery -- Study and teaching Childbirth -- Study and teaching -- South Africa Nursing -- Study and teaching
- Language: English
- Type: Thesis , Masters , MCur
- Identifier: http://hdl.handle.net/10948/13204 , vital:27161
- Description: Since the inception of the student supernumerary status, both globally and in South Africa, nursing and midwifery educators have been concerned about the clinical competencies of their students. Student clinical competency levels in South Africa are critical to midwifery practice, especially as most litigation against the Department of Health in South Africa concerns negligence in midwifery practice. In addition, the litigations mostly involve newly qualified midwives, thus suggesting a link with practice competency levels. Several challenges exist in the academic and practice environments regarding student learning, practice and clinical preparedness. Lack of support during clinical placement and a lack of facilities for use during clinical practice modules are among these challenges. Some students, due to the challenges they face with clinical learning and practice, fail to meet the practical competencies for examination entry requirements. Consequently, some of these students have to repeat the year or exit the programme. The current study sought to identify how to assist midwifery educators in their activities to prepare students for clinical placement readiness. The first objective of the study was to explore and describe the perceptions of midwifery educators regarding the need for additional measures to enhance the clinical preparedness of basic midwifery students before they are allocated to the clinical areas. The second objective sought to make recommendations that would further assist the midwifery educators to clinically prepare midwifery students before being allocated and placed in different clinical areas. A qualitative, explorative, descriptive and contextual research design was used for the study and the study was conducted at a nursing college in the Eastern Cape Province from August 2014 to January 2016. The research population consisted of midwifery educators at a nursing college and a purposive sampling technique was used guided by set criteria. Data were collected using focus group interviews. Four focus groups were used making a total of 17 participants. The principles applied for data analysis were those of Tesch’s method of data analysis, which were used to develop the themes and sub-themes. An independent coder assisted with the coding of the data for the purposes of trustworthiness. In addition, Lincoln and Guba’s model of trustworthiness consisting of the criteria of credibility, transferability, dependability and conformability was used to confirm the validity of the study while the ethical principles adopted were informed consent, justice, non-maleficence, privacy and confidentiality. The study found that the participants perceived numerous challenges that hindered the clinical preparedness of their students. These related to increased workload, lack of support from management and a lack of commitment on the part of students towards their studies. The participants also identified inconsistencies in clinical practice between the clinical midwives and the educators, and even among the educators themselves. This lack of consistency in turn causes confusion among the students and thus impacts negatively on their clinical practice preparedness. Based on these findings recommendations for clinical nursing practice, nursing education and research were made.
- Full Text:
- Date Issued: 2016
Entrepreneurial mindset and entrepreneurial education as tools for sustainable SMES
- Authors: Mbanga, Nelisa
- Date: 2016
- Subjects: Entrepreneurship -- South Africa Small business -- South Africa New business enterprises -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11277 , vital:26905
- Description: Small and Medium Enterprises are the engines of economic development. In developing countries, they play an irreplaceable role in poverty alleviation through creation of jobs and contribution towards the countries’ gross domestic products. South Africa is faced with a challenge of high failure rate of SMEs despite the efforts by government to support and grow this sector. For a country to have a strong sustainable economy, sustainable and successful SME sector is necessary. Literature reviews have demonstrated that incorporating sustainability aspect into entrepreneurship improves the performance of businesses. Research on implementation of sustainability principles by SMEs is limited and SMEs have been left out in sustainability teachings and monitoring. The purpose of the study was to analyse the role played by entrepreneurial mind-set and entrepreneurial education on sustainability of SMEs. The research was conducted amongst 10 SME owners/managers with businesses located in the Buffalo City Metropolitan Municipality. Case study method using a semi-structured interview guide was conducted. Results were transcribed, analysed and interpreted. Results of the research demonstrated that SME owners/managers possess entrepreneurial mind-set, which is a necessity to run a successful business. There was also evidence that entrepreneurial education enhances entrepreneurial mind-set of SME owners/managers. SMEs owners/managers also demonstrated that they implement sustainability principles informally with no guiding documents. With regards to implementation of sustainability principles, there was no noticeable difference between SME owners/managers who had undergone entrepreneurship education and the ones who had not gone through entrepreneurship education. This highlighted the need to incorporate sustainability issues in entrepreneurship education courses. The study brings contribution towards building sustainable SMEs.
- Full Text:
- Date Issued: 2016
- Authors: Mbanga, Nelisa
- Date: 2016
- Subjects: Entrepreneurship -- South Africa Small business -- South Africa New business enterprises -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: http://hdl.handle.net/10948/11277 , vital:26905
- Description: Small and Medium Enterprises are the engines of economic development. In developing countries, they play an irreplaceable role in poverty alleviation through creation of jobs and contribution towards the countries’ gross domestic products. South Africa is faced with a challenge of high failure rate of SMEs despite the efforts by government to support and grow this sector. For a country to have a strong sustainable economy, sustainable and successful SME sector is necessary. Literature reviews have demonstrated that incorporating sustainability aspect into entrepreneurship improves the performance of businesses. Research on implementation of sustainability principles by SMEs is limited and SMEs have been left out in sustainability teachings and monitoring. The purpose of the study was to analyse the role played by entrepreneurial mind-set and entrepreneurial education on sustainability of SMEs. The research was conducted amongst 10 SME owners/managers with businesses located in the Buffalo City Metropolitan Municipality. Case study method using a semi-structured interview guide was conducted. Results were transcribed, analysed and interpreted. Results of the research demonstrated that SME owners/managers possess entrepreneurial mind-set, which is a necessity to run a successful business. There was also evidence that entrepreneurial education enhances entrepreneurial mind-set of SME owners/managers. SMEs owners/managers also demonstrated that they implement sustainability principles informally with no guiding documents. With regards to implementation of sustainability principles, there was no noticeable difference between SME owners/managers who had undergone entrepreneurship education and the ones who had not gone through entrepreneurship education. This highlighted the need to incorporate sustainability issues in entrepreneurship education courses. The study brings contribution towards building sustainable SMEs.
- Full Text:
- Date Issued: 2016
Environmental factors influencing ecotonal changes in an indigenous forest in the Keiskammahoek Forest Estate, Eastern Cape, South Africa
- Authors: Kiva, Luthando
- Date: 2016
- Subjects: Forest ecology -- South Africa -- Eastern Cape Forests and forestry -- South Africa -- Eastern Cape Forest conservation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2743 , vital:28071
- Description: This study investigates environmental factors influencing ecotonal changes in the Dontsa Forest Management Unit (FMU) of the Keiskammahoek Estate Forest which is located in the Amatole Mountains of the Eastern Cape in the Republic of South Africa. The patterns of forest edge movement were analysed to show trends of forest edge movement from 1975 to 1985, 1975 to 1992, 1975 to 2002, 1975 to 2014, 1985 to 1992, 1985 to 2002, 1985 to 2014, 1992 to 2002, 1992 to 2014 and 2002 to 2014 by digitizing and assessing the scale of forest edge movement using georeferenced aerial photographs. Belt transects were established in six sites that were selected on the basis of physiographic elements for determination of the driving forces of forest ecotonal changes. The results of the study show that the forest edge moved positive towards the grassland biome while in other sites there was contraction of the forest edge from 1975 to 2014. The findings of the study show that some forest patches moved with few individual pioneer species towards the grassland while indigenous species dominated in the ecotone area of the forest in other research sites. D whyteana, A latifolius, R melanophloes, A facultus, R prenoides, C aurea, C bispinosa, C inerme, and S martina are the plant species with high density in the forest ecotone while A latifolius, R prenoides, R melanophloes were highly distributed along the grassland area. The results also show that harvesting of Pinus patula and illegal harvesting of understory species are major factors that result in ecotonal changes of Dontsa FMU. The research sites adjacent to residential areas have experienced reduction of ecotone area as compared to the research sites in high altitude areas of the Amathole Mountains where there is less disturbance. The eastern facing aspect of the forest exhibited a high density of plants in the forest ecotone as compared to the west facing slope.
- Full Text:
- Date Issued: 2016
- Authors: Kiva, Luthando
- Date: 2016
- Subjects: Forest ecology -- South Africa -- Eastern Cape Forests and forestry -- South Africa -- Eastern Cape Forest conservation -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2743 , vital:28071
- Description: This study investigates environmental factors influencing ecotonal changes in the Dontsa Forest Management Unit (FMU) of the Keiskammahoek Estate Forest which is located in the Amatole Mountains of the Eastern Cape in the Republic of South Africa. The patterns of forest edge movement were analysed to show trends of forest edge movement from 1975 to 1985, 1975 to 1992, 1975 to 2002, 1975 to 2014, 1985 to 1992, 1985 to 2002, 1985 to 2014, 1992 to 2002, 1992 to 2014 and 2002 to 2014 by digitizing and assessing the scale of forest edge movement using georeferenced aerial photographs. Belt transects were established in six sites that were selected on the basis of physiographic elements for determination of the driving forces of forest ecotonal changes. The results of the study show that the forest edge moved positive towards the grassland biome while in other sites there was contraction of the forest edge from 1975 to 2014. The findings of the study show that some forest patches moved with few individual pioneer species towards the grassland while indigenous species dominated in the ecotone area of the forest in other research sites. D whyteana, A latifolius, R melanophloes, A facultus, R prenoides, C aurea, C bispinosa, C inerme, and S martina are the plant species with high density in the forest ecotone while A latifolius, R prenoides, R melanophloes were highly distributed along the grassland area. The results also show that harvesting of Pinus patula and illegal harvesting of understory species are major factors that result in ecotonal changes of Dontsa FMU. The research sites adjacent to residential areas have experienced reduction of ecotone area as compared to the research sites in high altitude areas of the Amathole Mountains where there is less disturbance. The eastern facing aspect of the forest exhibited a high density of plants in the forest ecotone as compared to the west facing slope.
- Full Text:
- Date Issued: 2016
Equal pay for equal work
- Authors: Paul, Gary William
- Date: 2016
- Subjects: Equal pay for equal work -- South Africa , Labor laws and legislation -- South Africa , Pay equity -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/5343 , vital:20830
- Description: The notion of Decent Work has been broadly advocated since 1999 by means of various International Labour Organisation (ILO) Conventions. Through these Conventions and as part of its Decent Work Agenda, the ILO strives to foster the creation of social and economic systems, capable of ensuring basic security and employment and adaptable to rapidly changing local and global economic circumstances. The Decent Work Agenda has been widely accepted as an important strategy to eradicate poverty and enable socio-economic development. It is submitted that the concept of Decent Work as contemplated by the ILO, firstly focuses on the payment of an income, which allows the working individual a good life. It secondly strives to ensure that everybody has an equal chance to develop themselves; that working conditions are safe; that there is no instance of child and forced labour; and that discrimination does not occur. The elimination of discrimination in the workplace is not only an ever-evolving pursuit, given that it continues to manifest in innumerable forms, but it has also proven to be an extremely pervasive pursuit as evidenced by the jurisdiction-specific literature review in this study. The jurisdictions focused on in this study are the United States of America, the United Kingdom and Australia. This study concerns itself with pay-related discrimination which strains ILO Conventions No 100 and 111. Convention 100 focuses on equal pay for equal work and Convention No 111 focuses on the elimination of all forms of discrimination in the workplace. In spite of extensive legislative developments in the various jurisdictions which form part of this study, enhanced by the creation of various practical mechanisms to enable the elimination of pay-related discrimination, the stubborn problem of discriminatory pay practices has survived structured and deliberate attempts to get rid of it. In South Africa, the amendment to section 6(4) of the Employment Equity Act, assented on 1 August 2014, specifically describes a difference in conditions of employment between employees of the same employer performing the same or substantially the same work or work of equal value based on any one or more of the grounds listed in section 6(1), as unfair discrimination. This amendment therefore seeks to prohibit such unfair discriminatory practices. Based on the newness of this amendment and the fact that courts have not yet delivered judgments arising from litigation related to this particular amendment, a sense of uncertainty exists with respect to the adequacy of the amended section 6 in the Employment Equity Amendment Act. If progress in the other jurisdictions in this regard is anything to go by, there is no reason to believe that the amendment to section 6 will be a panacea capable of addressing all alleged discriminatory pay practices.
- Full Text:
- Date Issued: 2016
- Authors: Paul, Gary William
- Date: 2016
- Subjects: Equal pay for equal work -- South Africa , Labor laws and legislation -- South Africa , Pay equity -- South Africa
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: http://hdl.handle.net/10948/5343 , vital:20830
- Description: The notion of Decent Work has been broadly advocated since 1999 by means of various International Labour Organisation (ILO) Conventions. Through these Conventions and as part of its Decent Work Agenda, the ILO strives to foster the creation of social and economic systems, capable of ensuring basic security and employment and adaptable to rapidly changing local and global economic circumstances. The Decent Work Agenda has been widely accepted as an important strategy to eradicate poverty and enable socio-economic development. It is submitted that the concept of Decent Work as contemplated by the ILO, firstly focuses on the payment of an income, which allows the working individual a good life. It secondly strives to ensure that everybody has an equal chance to develop themselves; that working conditions are safe; that there is no instance of child and forced labour; and that discrimination does not occur. The elimination of discrimination in the workplace is not only an ever-evolving pursuit, given that it continues to manifest in innumerable forms, but it has also proven to be an extremely pervasive pursuit as evidenced by the jurisdiction-specific literature review in this study. The jurisdictions focused on in this study are the United States of America, the United Kingdom and Australia. This study concerns itself with pay-related discrimination which strains ILO Conventions No 100 and 111. Convention 100 focuses on equal pay for equal work and Convention No 111 focuses on the elimination of all forms of discrimination in the workplace. In spite of extensive legislative developments in the various jurisdictions which form part of this study, enhanced by the creation of various practical mechanisms to enable the elimination of pay-related discrimination, the stubborn problem of discriminatory pay practices has survived structured and deliberate attempts to get rid of it. In South Africa, the amendment to section 6(4) of the Employment Equity Act, assented on 1 August 2014, specifically describes a difference in conditions of employment between employees of the same employer performing the same or substantially the same work or work of equal value based on any one or more of the grounds listed in section 6(1), as unfair discrimination. This amendment therefore seeks to prohibit such unfair discriminatory practices. Based on the newness of this amendment and the fact that courts have not yet delivered judgments arising from litigation related to this particular amendment, a sense of uncertainty exists with respect to the adequacy of the amended section 6 in the Employment Equity Amendment Act. If progress in the other jurisdictions in this regard is anything to go by, there is no reason to believe that the amendment to section 6 will be a panacea capable of addressing all alleged discriminatory pay practices.
- Full Text:
- Date Issued: 2016
Establishing a waste management system for Cape Peninsula University of Technology
- Authors: Myamya, Luyolo Ebenezer
- Date: 2016
- Subjects: Waste minimization -- South Africa Sanitary engineering -- South Africa Environmental management -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/11670 , vital:26949
- Description: Communities around the globe are confronted by environmental challenges such as waste management. These challenges are further aggravated by factors such the increasing volumes of waste, landfills that are running out of capacity and scarcity of suitable land to construct new landfill sites. The National Waste Management Strategy requires participation from all members of society including households, businesses, community organisations, nongovernmental organisations, parastatals and the three spheres of government, to promote practices that minimise the volumes of waste generated. The purpose of the research was to assess and investigate the current waste management practices at the Cape Peninsula University of Technology (CPUT), and recommend a waste management system. The research employed a quantitative approach, where participants were asked to complete a survey questionnaire. A literature review was conducted on waste management at higher learning institutions, with particular focus on the contribution that a university can make in alleviating some of the adverse effects of waste management. The outcome of the review highlighted some of the opportunities and barriers that can either disrupt or augment the process of implementing a waste management system. The results from the research revealed that CPUT does not conform to the hierarchy of waste management, and there is no waste management policy in place. The effect of this is that the stakeholders were not satisfied with the lack of leadership on waste related challenges. By developing a policy, providing leadership, conducting awareness campaigns and prioritising environmental challenges such responsible management waste, could improve the image of the institution in the eyes if its stakeholders.
- Full Text:
- Date Issued: 2016
- Authors: Myamya, Luyolo Ebenezer
- Date: 2016
- Subjects: Waste minimization -- South Africa Sanitary engineering -- South Africa Environmental management -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/11670 , vital:26949
- Description: Communities around the globe are confronted by environmental challenges such as waste management. These challenges are further aggravated by factors such the increasing volumes of waste, landfills that are running out of capacity and scarcity of suitable land to construct new landfill sites. The National Waste Management Strategy requires participation from all members of society including households, businesses, community organisations, nongovernmental organisations, parastatals and the three spheres of government, to promote practices that minimise the volumes of waste generated. The purpose of the research was to assess and investigate the current waste management practices at the Cape Peninsula University of Technology (CPUT), and recommend a waste management system. The research employed a quantitative approach, where participants were asked to complete a survey questionnaire. A literature review was conducted on waste management at higher learning institutions, with particular focus on the contribution that a university can make in alleviating some of the adverse effects of waste management. The outcome of the review highlighted some of the opportunities and barriers that can either disrupt or augment the process of implementing a waste management system. The results from the research revealed that CPUT does not conform to the hierarchy of waste management, and there is no waste management policy in place. The effect of this is that the stakeholders were not satisfied with the lack of leadership on waste related challenges. By developing a policy, providing leadership, conducting awareness campaigns and prioritising environmental challenges such responsible management waste, could improve the image of the institution in the eyes if its stakeholders.
- Full Text:
- Date Issued: 2016
Evaluating farmers' perceptions and the impact of bush encroachment on herbaceous vegetation and soil nutrients in Sheshegu communal rangelands of the Eastern Cape, South Africa
- Authors: Tokozwayo, Sive
- Date: 2016
- Subjects: Range management -- South Africa -- Eastern Cape Brush -- Control -- South Africa -- Eastern Cape Communal rangelands -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2733 , vital:28066
- Description: Communal rangelands occupy 13 percent of the agricultural land in South Africa, and these rangelands serve as a source of feed to livestock. These areas are threatened by bush encroachment due to poor rangeland management. This study was conducted in Alice (Sheshegu communal area) and the objective was to assess farmers' perceptions and the impact of bush encroachment on herbaceous vegetation and soil nutrients. Structured questionnaires were used to assess indigenous knowledge of communal farmers on the impact of bush encroachment on rangelands. Fourty (40) respondents from households who owned livestock were randomly selected and interviewed at Sheshegu village. About 89 percent of communal farmers perceived that change of their grasslands to encroached savannas was caused by unreliable rainfall, prolonged drought, and poor rangeland management. Rangeland assessment was performed at four sites (Scattered, Moderate, Mixed and Dense bushland. 100mx50m were demarcated per site, and four 100m transects were laid parallel to each other, 30m apart. The step point method was used to determine both species composition and basal cover. Biomass production was determined by harvesting forage within randomly-paced a 0.25m2 quadrats. Aristada congesta and Eragrostis obtuse were the most dominating grass species in dense, mixed and moderate bushland. Scattered bushland was dominated by Themeda triandra. Biomass production increases with increase in bush density and basal cover improved from winter to summer season. Increaser grass species increase with the increase in bush density, this indicated that the rangeland was poorly managed and palatable species were being replaced by less palatable ones. Species composition of woody plants was determined within a 200m2 belt transect in all sites. Maytenus polycantha, Aloe ferox, Erehia rigida and lucas capensis were the most dominant woody species in Mixed bushland while Acacia karroo was most dominated in Scattered, Moderate and Dense bushland. Woody density showed no significant differences (P> 0.05) between Dense, Mixed and Moderate bushland. Woody plant density in all these sites exceed 2500 plants/ha, which showed that the rangeland was encroached with woody plants. Soil nutrient content was determined for each site. Five samples of soil were collected per site to test the effect of bush encroachment on soil nutrient composition. The concentration of nitrogen and soil pH increased with increase in bush density, while that of potassium, phosphorous, magnesium, sodium and sulphur showed no significant differences (P>0.05) across all homogenous vegetation units. The study revealed that Sheshegu communal farmers are aware of both negative and positive effects of encroachment on their community, and also argue that the government is not willing to support communal farmers in the process of reducing the spread of bush encroachment. It was concluded that the concentration of nitrogen and soil pH increased with increasing bush density and that bush encroachment had negative effects on herbaceous species. It was recommended that communal farmers should be formulating rangeland rules and regulations to manage rangeland resources. Rangeland rules and regulations should be based on the management of livestock management during grazing and harvesting of rangeland resources. The harvesting of woody and good timing of application of fire can also reduce the spread of bush encroachment. Veld resting and rotational grazing can also improve fuel load which is required for burning of woody plants. Furthermore, Department of agriculture should also provide workshops or training to communal farmers use different approaches or cheap ways of reducing bush encroachment and conserving rangeland resources.
- Full Text:
- Date Issued: 2016
- Authors: Tokozwayo, Sive
- Date: 2016
- Subjects: Range management -- South Africa -- Eastern Cape Brush -- Control -- South Africa -- Eastern Cape Communal rangelands -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/2733 , vital:28066
- Description: Communal rangelands occupy 13 percent of the agricultural land in South Africa, and these rangelands serve as a source of feed to livestock. These areas are threatened by bush encroachment due to poor rangeland management. This study was conducted in Alice (Sheshegu communal area) and the objective was to assess farmers' perceptions and the impact of bush encroachment on herbaceous vegetation and soil nutrients. Structured questionnaires were used to assess indigenous knowledge of communal farmers on the impact of bush encroachment on rangelands. Fourty (40) respondents from households who owned livestock were randomly selected and interviewed at Sheshegu village. About 89 percent of communal farmers perceived that change of their grasslands to encroached savannas was caused by unreliable rainfall, prolonged drought, and poor rangeland management. Rangeland assessment was performed at four sites (Scattered, Moderate, Mixed and Dense bushland. 100mx50m were demarcated per site, and four 100m transects were laid parallel to each other, 30m apart. The step point method was used to determine both species composition and basal cover. Biomass production was determined by harvesting forage within randomly-paced a 0.25m2 quadrats. Aristada congesta and Eragrostis obtuse were the most dominating grass species in dense, mixed and moderate bushland. Scattered bushland was dominated by Themeda triandra. Biomass production increases with increase in bush density and basal cover improved from winter to summer season. Increaser grass species increase with the increase in bush density, this indicated that the rangeland was poorly managed and palatable species were being replaced by less palatable ones. Species composition of woody plants was determined within a 200m2 belt transect in all sites. Maytenus polycantha, Aloe ferox, Erehia rigida and lucas capensis were the most dominant woody species in Mixed bushland while Acacia karroo was most dominated in Scattered, Moderate and Dense bushland. Woody density showed no significant differences (P> 0.05) between Dense, Mixed and Moderate bushland. Woody plant density in all these sites exceed 2500 plants/ha, which showed that the rangeland was encroached with woody plants. Soil nutrient content was determined for each site. Five samples of soil were collected per site to test the effect of bush encroachment on soil nutrient composition. The concentration of nitrogen and soil pH increased with increase in bush density, while that of potassium, phosphorous, magnesium, sodium and sulphur showed no significant differences (P>0.05) across all homogenous vegetation units. The study revealed that Sheshegu communal farmers are aware of both negative and positive effects of encroachment on their community, and also argue that the government is not willing to support communal farmers in the process of reducing the spread of bush encroachment. It was concluded that the concentration of nitrogen and soil pH increased with increasing bush density and that bush encroachment had negative effects on herbaceous species. It was recommended that communal farmers should be formulating rangeland rules and regulations to manage rangeland resources. Rangeland rules and regulations should be based on the management of livestock management during grazing and harvesting of rangeland resources. The harvesting of woody and good timing of application of fire can also reduce the spread of bush encroachment. Veld resting and rotational grazing can also improve fuel load which is required for burning of woody plants. Furthermore, Department of agriculture should also provide workshops or training to communal farmers use different approaches or cheap ways of reducing bush encroachment and conserving rangeland resources.
- Full Text:
- Date Issued: 2016
Evaluating late payment-induced waste in South Africa through lean construction principles
- Authors: Akuffo-Ntow, Eric Ayesu
- Date: 2016
- Subjects: Construction industry -- South Africa -- Finance , Lean manufacturing -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/8867 , vital:26437
- Description: Central to the sustainable and competitive growth of the South African construction industry is a predictable cash flow through on time payment by clients to contractors. However, chronic late payments, a recurring problem in the industry, especially in the public sector, is bringing untold hardship to contractors by derailing their competitiveness and also eroding the trust among the supply chain partners to the extent that some firms end up closing business in the industry. The situation is viewed from the lean construction perspective as an obstacle that is preventing the accrual of the required value to project parties in the construction industry. This research addresses the causes of late payments to contractors and the role of the quantity surveyor (QS) in terms of influencing early payment from a lean construction perspective. A mixed method approach was used for compiling the primary data for the study. Sequentially, one hundred and two (102) quantitative and twelve (12) interview questionnaires were administered to selected contractors and construction professionals working predominantly on public sector projects. The findings revealed that the approval process for evaluation and certification by the client- appointed agent and intermediary institutions is taking longer than contractually allowed, with parties independently undertaking their evaluation prior to the certification date. This is found to be adverse to achieving consensus on the values of the works for authorisation. Other significant barriers are the lack of funds to authorise payment, random auditor general’s documentation changes, lack of administrators’ system integration and capacity to handle cyclical payment processing. Also, contractors have been found to be in default of timeously submitting complete claim documents. It is therefore recommended that the client agents should partner with the contractor in regular design and documentation reviews, arranging the payment process and should also meet jointly to prepare monthly evaluations. In addition, contractors should be mentored from the onset of the project regarding all the necessary documentation and supporting documents that will be required by the client to ensure that payment approvals are not delayed. The payment authori-sation agent’s capacity should be enhanced through training and improved powers as a singular point of control to perform efficiently and their systems and processes should be integrated to ensure that all parties are implementing the same protocols.
- Full Text:
- Date Issued: 2016
- Authors: Akuffo-Ntow, Eric Ayesu
- Date: 2016
- Subjects: Construction industry -- South Africa -- Finance , Lean manufacturing -- South Africa
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/8867 , vital:26437
- Description: Central to the sustainable and competitive growth of the South African construction industry is a predictable cash flow through on time payment by clients to contractors. However, chronic late payments, a recurring problem in the industry, especially in the public sector, is bringing untold hardship to contractors by derailing their competitiveness and also eroding the trust among the supply chain partners to the extent that some firms end up closing business in the industry. The situation is viewed from the lean construction perspective as an obstacle that is preventing the accrual of the required value to project parties in the construction industry. This research addresses the causes of late payments to contractors and the role of the quantity surveyor (QS) in terms of influencing early payment from a lean construction perspective. A mixed method approach was used for compiling the primary data for the study. Sequentially, one hundred and two (102) quantitative and twelve (12) interview questionnaires were administered to selected contractors and construction professionals working predominantly on public sector projects. The findings revealed that the approval process for evaluation and certification by the client- appointed agent and intermediary institutions is taking longer than contractually allowed, with parties independently undertaking their evaluation prior to the certification date. This is found to be adverse to achieving consensus on the values of the works for authorisation. Other significant barriers are the lack of funds to authorise payment, random auditor general’s documentation changes, lack of administrators’ system integration and capacity to handle cyclical payment processing. Also, contractors have been found to be in default of timeously submitting complete claim documents. It is therefore recommended that the client agents should partner with the contractor in regular design and documentation reviews, arranging the payment process and should also meet jointly to prepare monthly evaluations. In addition, contractors should be mentored from the onset of the project regarding all the necessary documentation and supporting documents that will be required by the client to ensure that payment approvals are not delayed. The payment authori-sation agent’s capacity should be enhanced through training and improved powers as a singular point of control to perform efficiently and their systems and processes should be integrated to ensure that all parties are implementing the same protocols.
- Full Text:
- Date Issued: 2016
Evaluating revenue collection and allocation challenges faced by Ndlambe Local Municipality (Eastern Cape Province)
- Pieters, Nonkqubela Ntomboxolo
- Authors: Pieters, Nonkqubela Ntomboxolo
- Date: 2016
- Subjects: Municipal corporations -- Taxation -- South Africa -- Eastern Cape Municipal finance -- South Africa -- Eastern Cape Local government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/4442 , vital:28333
- Description: In this project, the researcher evaluates revenue collection and allocation challenges faced by South African Municipalities in the case of NDLAMBE Local Municipality and this research project consist of five Chapters. Chapter one introduces and outlines the setting of the study and also provides the problem statement, research questions, research objectives and significance of the study. The chapter further clarifies the key concepts and terms that were used in the study, delimitation and limitations of the study. Chapter two provides a critical discussion of the concept of revenue collection and allocation, focusing on the various perspective of revenue. A source of municipal revenue and revenue collection and allocation model is explained as well as theoretical framework that guides it. Chapter three gives an account of the research design and methodology used in the study and in this study the researcher used the qualitative research approach as a data collection technique and document surveys were used because it is cheap and it saves time. The chapter also highlights the revenue collection and allocation applicable to the study and conclude by discussing the data analysis techniques that were used in the empirical study. Chapter four dealt with the data analysis of data collected presentation and discussion of the results and the researcher analyzed data using the filtering technique and content analysis. Chapter five drew conclusions and made scientific recommendations based on the research findings.The municipality is largely dependent on grants from upper spheres of government and generate less than 20 percent of current expenditures from own resources. As a whole, the revenue collection and allocation challenge of the NDLAMBE Local Municipality, given the current scenario of flows, is a reason for concern. Due to historical and political factors, local governments in South Africa differ substantially in terms of potential revenue base, but it may be that in many cases potential revenue is not exploited and that the high level of dependency on grants, high level of bad debts and lack of political will to be more self-reliant is the result of poor revenue in NDLAMBE Local Municipality.
- Full Text:
- Date Issued: 2016
- Authors: Pieters, Nonkqubela Ntomboxolo
- Date: 2016
- Subjects: Municipal corporations -- Taxation -- South Africa -- Eastern Cape Municipal finance -- South Africa -- Eastern Cape Local government -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: http://hdl.handle.net/10353/4442 , vital:28333
- Description: In this project, the researcher evaluates revenue collection and allocation challenges faced by South African Municipalities in the case of NDLAMBE Local Municipality and this research project consist of five Chapters. Chapter one introduces and outlines the setting of the study and also provides the problem statement, research questions, research objectives and significance of the study. The chapter further clarifies the key concepts and terms that were used in the study, delimitation and limitations of the study. Chapter two provides a critical discussion of the concept of revenue collection and allocation, focusing on the various perspective of revenue. A source of municipal revenue and revenue collection and allocation model is explained as well as theoretical framework that guides it. Chapter three gives an account of the research design and methodology used in the study and in this study the researcher used the qualitative research approach as a data collection technique and document surveys were used because it is cheap and it saves time. The chapter also highlights the revenue collection and allocation applicable to the study and conclude by discussing the data analysis techniques that were used in the empirical study. Chapter four dealt with the data analysis of data collected presentation and discussion of the results and the researcher analyzed data using the filtering technique and content analysis. Chapter five drew conclusions and made scientific recommendations based on the research findings.The municipality is largely dependent on grants from upper spheres of government and generate less than 20 percent of current expenditures from own resources. As a whole, the revenue collection and allocation challenge of the NDLAMBE Local Municipality, given the current scenario of flows, is a reason for concern. Due to historical and political factors, local governments in South Africa differ substantially in terms of potential revenue base, but it may be that in many cases potential revenue is not exploited and that the high level of dependency on grants, high level of bad debts and lack of political will to be more self-reliant is the result of poor revenue in NDLAMBE Local Municipality.
- Full Text:
- Date Issued: 2016
Evaluation of p-menthane-3, 8-diol citronellal acetal as a suitable bio-plasticizer for polyvinyl chloride
- Authors: Ncanywa, Luphumlo
- Date: 2016
- Subjects: Polyvinyl chloride Chlorine compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/45898 , vital:39317
- Description: The main aim of this project is to test novel naturally-derived plasticizers (bio-plasticizers) synthesized at Innoventon and to determine if they are a suitable replacement for conventional plasticizers used to plasticize polyvinyl chloride. Polyvinyl chloride (PVC) is one of the most common plastics used in the world because of its durability and low cost. PVC when blended with plasticizers is a versatile thermoplastic and is used in many applications. A plasticizer is a substance that is added to a material, usually a polymer, to increase flexibility, softness and workability. Many elastomers and polymers are tough and dry; therefore they need plasticizers to make them useful. A plasticizer must be thoroughly incorporated in the elastomer or polymer in order for it to be effective. There are many types of plasticizers used in the world. Phthalate plasticizers are the most commonly used plasticizers of the past century. They comprise 92% of the global production of plasticizers. DEHP (di-ethyl hexyl phthalate) is the most widely used phthalate plasticizer. Phthalate plasticizers have been proved to be harmful to the environment and human beings. They can cause many harmful diseases to humans e.g. kidney failure, heart disease, liver failure, fertility and growth disorders. They lower testosterone in baby boys that are exposed through breast milk. In light of the above, the use of certain phthalates has been banned in cosmetics and consumer products. Since there is sufficient evidence to raise fears over the use of phthalate plasticizers, there is a great opportunity to find a way to replace phthalate plasticizers in PVC with bio-plasticizers. The current study represents the first step in developing alternative plasticizers for PVC and other polymers. These alternative plasticizers are characterized by low toxicity, low migration and are less harmful to the environment and human beings. p-menthane-3, 8-diol citronellal acetal is one such proposed bio-plasticizer which has a similar structure to the phthalates and has been previously reported by Innoventon to have potential plasticizing characteristics. During this study PVC was plasticized with PMD-citronellal acetal and tested for plasticizing properties. The plasticizing effect of PMD-citronellal acetal in PVC films was compared to that of conventional plasticizer dibutyl phthalate (DBP). The two plasticizers‟ performance was evaluated by preparing PVC films with varying amounts of each plasticizer and PMD-citronellal acetal subjecting the films to a series of tests. Tensile strength and elongation tests were performed on the plasticized and unplasticized films but these tests did not produce consistent results due to premature failures on the films. However, tensile strength was reduced in some films for both plasticizers compared to unplasticized film. Elongation and flexibility were increased in some samples as the percentage of plasticizer in each film was increased. Glass transition temperatures were determined for the plasticized and unplasticized PVC films. Glass transition temperature of both plasticizers was reduced as the percentage of plasticizer in each film was increased. Multiple regression analysis was done on the data to compare the similarity of the two plasticizers. The statistical tests showed that DBP and PMD-citronellal acetal have the same plasticization property with regard to glass transition temperature of PVC. The thermal stability of the PVC films with the two plasticizers was evaluated. Similar thermal stability was observed on the PVC, PVC with DBP and PVC with PMD-citronellal acetal. The leaching of the PMD-citronellal acetal and DBP were compared. The plasticizer loss increased as the percentage of each plasticizer in the PVC increased. The relationship between the percentage of the plasticizers and leaching rate was further analysed using multiple linear regressions. The two plasticizers were found to have the same leaching rate. FTIR analysis was performed on the plasticized and unplasticized PVC films to identify functional groups present and to determine whether the plasticizers formed any bonds with PVC functional groups. The characteristics bands of PVC were observed in FTIR. The FTIR spectra indicated that the plasticizers were incorporated into the PVC matrix without bonding. The results of the tests showed that PMD-citronellal acetal can be a suitable bio-plasticizer for PVC since it exhibited similar plasticization properties to DBP with regard to glass transition temperatures, leaching rates and thermal stability. Regarding tensile strength and elongation, further testing has to be done as the preliminary results were inconclusive. PMDcitronellal acetal was shown to be a possible alternative for DBP.
- Full Text:
- Date Issued: 2016
- Authors: Ncanywa, Luphumlo
- Date: 2016
- Subjects: Polyvinyl chloride Chlorine compounds
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10948/45898 , vital:39317
- Description: The main aim of this project is to test novel naturally-derived plasticizers (bio-plasticizers) synthesized at Innoventon and to determine if they are a suitable replacement for conventional plasticizers used to plasticize polyvinyl chloride. Polyvinyl chloride (PVC) is one of the most common plastics used in the world because of its durability and low cost. PVC when blended with plasticizers is a versatile thermoplastic and is used in many applications. A plasticizer is a substance that is added to a material, usually a polymer, to increase flexibility, softness and workability. Many elastomers and polymers are tough and dry; therefore they need plasticizers to make them useful. A plasticizer must be thoroughly incorporated in the elastomer or polymer in order for it to be effective. There are many types of plasticizers used in the world. Phthalate plasticizers are the most commonly used plasticizers of the past century. They comprise 92% of the global production of plasticizers. DEHP (di-ethyl hexyl phthalate) is the most widely used phthalate plasticizer. Phthalate plasticizers have been proved to be harmful to the environment and human beings. They can cause many harmful diseases to humans e.g. kidney failure, heart disease, liver failure, fertility and growth disorders. They lower testosterone in baby boys that are exposed through breast milk. In light of the above, the use of certain phthalates has been banned in cosmetics and consumer products. Since there is sufficient evidence to raise fears over the use of phthalate plasticizers, there is a great opportunity to find a way to replace phthalate plasticizers in PVC with bio-plasticizers. The current study represents the first step in developing alternative plasticizers for PVC and other polymers. These alternative plasticizers are characterized by low toxicity, low migration and are less harmful to the environment and human beings. p-menthane-3, 8-diol citronellal acetal is one such proposed bio-plasticizer which has a similar structure to the phthalates and has been previously reported by Innoventon to have potential plasticizing characteristics. During this study PVC was plasticized with PMD-citronellal acetal and tested for plasticizing properties. The plasticizing effect of PMD-citronellal acetal in PVC films was compared to that of conventional plasticizer dibutyl phthalate (DBP). The two plasticizers‟ performance was evaluated by preparing PVC films with varying amounts of each plasticizer and PMD-citronellal acetal subjecting the films to a series of tests. Tensile strength and elongation tests were performed on the plasticized and unplasticized films but these tests did not produce consistent results due to premature failures on the films. However, tensile strength was reduced in some films for both plasticizers compared to unplasticized film. Elongation and flexibility were increased in some samples as the percentage of plasticizer in each film was increased. Glass transition temperatures were determined for the plasticized and unplasticized PVC films. Glass transition temperature of both plasticizers was reduced as the percentage of plasticizer in each film was increased. Multiple regression analysis was done on the data to compare the similarity of the two plasticizers. The statistical tests showed that DBP and PMD-citronellal acetal have the same plasticization property with regard to glass transition temperature of PVC. The thermal stability of the PVC films with the two plasticizers was evaluated. Similar thermal stability was observed on the PVC, PVC with DBP and PVC with PMD-citronellal acetal. The leaching of the PMD-citronellal acetal and DBP were compared. The plasticizer loss increased as the percentage of each plasticizer in the PVC increased. The relationship between the percentage of the plasticizers and leaching rate was further analysed using multiple linear regressions. The two plasticizers were found to have the same leaching rate. FTIR analysis was performed on the plasticized and unplasticized PVC films to identify functional groups present and to determine whether the plasticizers formed any bonds with PVC functional groups. The characteristics bands of PVC were observed in FTIR. The FTIR spectra indicated that the plasticizers were incorporated into the PVC matrix without bonding. The results of the tests showed that PMD-citronellal acetal can be a suitable bio-plasticizer for PVC since it exhibited similar plasticization properties to DBP with regard to glass transition temperatures, leaching rates and thermal stability. Regarding tensile strength and elongation, further testing has to be done as the preliminary results were inconclusive. PMDcitronellal acetal was shown to be a possible alternative for DBP.
- Full Text:
- Date Issued: 2016
Evaluation of physiochemical qualities and heavy metal levels of the final effluents of some wastewater treatment facilities in the Eastern Cape Province of South Africa
- Authors: Kulati, Thanduxolo Cullinan
- Date: 2016
- Subjects: Water -- Purification Sewage -- Purification
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/1547 , vital:27417
- Description: Water is the most abundant substance in nature and vital for life activities. The major water sources for use are surface water bodies such as rivers and lakes, and underground aquifers and pore spaces down the water table (Ring, 2003). Water derived from these sources is not necessarily pure since it contains dissolved inorganic and organic substances, living organisms (viruses, bacteria, etc). For these reasons, water intended for domestic uses should be free from toxic substances and microorganisms that are of health significance (WHO, 2005). The availability and quality of water always have played an important role in determining the quality of life. Water quality is closely linked to water use and to the state of economic development (Chennakrishnan et al., 2008). Ground and surface waters can be contaminated by several sources. In urban areas, the careless disposal of industrial effluents and other wastes may contribute greatly to the poor quality of water (Mathuthu et al., 1997). In most developing countries, most areas are located on the watersheds which are the end points of effluents discharged from various industries (Oberholster and Ashton, 2008). South Africa, as a developing country, is experiencing rapid demographic changes due to urbanization, industrialization and population growth. The country has also been identified as being water-scarce, which can lead to a challenge of meeting the increasing water demand due to industrialization and urbanization. Such population growth increase may result in an increase in wastewater output, especially around urban areas.
- Full Text:
- Date Issued: 2016
- Authors: Kulati, Thanduxolo Cullinan
- Date: 2016
- Subjects: Water -- Purification Sewage -- Purification
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: http://hdl.handle.net/10353/1547 , vital:27417
- Description: Water is the most abundant substance in nature and vital for life activities. The major water sources for use are surface water bodies such as rivers and lakes, and underground aquifers and pore spaces down the water table (Ring, 2003). Water derived from these sources is not necessarily pure since it contains dissolved inorganic and organic substances, living organisms (viruses, bacteria, etc). For these reasons, water intended for domestic uses should be free from toxic substances and microorganisms that are of health significance (WHO, 2005). The availability and quality of water always have played an important role in determining the quality of life. Water quality is closely linked to water use and to the state of economic development (Chennakrishnan et al., 2008). Ground and surface waters can be contaminated by several sources. In urban areas, the careless disposal of industrial effluents and other wastes may contribute greatly to the poor quality of water (Mathuthu et al., 1997). In most developing countries, most areas are located on the watersheds which are the end points of effluents discharged from various industries (Oberholster and Ashton, 2008). South Africa, as a developing country, is experiencing rapid demographic changes due to urbanization, industrialization and population growth. The country has also been identified as being water-scarce, which can lead to a challenge of meeting the increasing water demand due to industrialization and urbanization. Such population growth increase may result in an increase in wastewater output, especially around urban areas.
- Full Text:
- Date Issued: 2016
Examining public participation as a contributor to good governance: a local government perspective
- Authors: Nkuntse, Tulani
- Date: 2016
- Subjects: Public administration -- South Africa -- Nelson Mandela Bay Municipality Local government -- South Africa -- Citizen participation South Africa -- Politics and government
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/11854 , vital:26982
- Description: This study undertook to examine public participation as a contributor to good governance in the Nelson Mandela Bay Municipality (NMBM), as part of the process of improving this Municipality’s governance. The main objectives of the study were to analyse the existing processes and arrangements for public participation in the NMBM; to examine the extent to which community participation influences decision-making; to investigate the factors that improve or lead to good governance in a municipal environment; to examine a framework for robust participation, in which communities are able to influence decisions that affect them; and to propose recommendations to potentially improve the Municipality’s governance. The triangulation research methodology was employed with emphasis on both the quantitative and qualitative methodologies. The sample comprised of two Ward Councillors, two selected Mayoral Committee members and 14 Ward Committee members. Questionnaires, with open and closed questions, were employed for the Ward Committee members and semi-structured interviews were conducted with both the Ward Councillors and the two Mayoral Committee members. Statistical procedures supplied by the NMMU Unit of Statistics were utilised to interpret and analyse the quantitative data to determine the results for data analysis. The qualitative data analysis involved thematic content analysis. The findings suggest that the current public participation processes are inadequate. The correlation of results further revealed that a significant negative relationship exists between the Ward Councillors, the Municipality and Ward Committee members. Despite various legislative prescriptions pertaining to public participation requirements in local government, the results suggest that the NMBM may be undertaking the public participation exercise for the sake of compliance and therefore it might not be a genuine exercise. The thesis proposes specific recommendations on how the NMBM can address the current shortcomings in terms of its public participation processes and strategies. Recommendations include significant civic education for the public to understand that being in a democratic country involves active participation in local affairs; more participatory initiatives need to be done to make the public aware of the role of Ward Committees and to invite people to apply to be on these Committees; recommendations also suggested that it would be crucial that Ward Committees are not used as a political platform to push political agendas, as this deters public participation. The NMBM needs to establish a monitoring and evaluation process to track their progress with public participation and develop and implement a public participation strategy and policy for enhanced public participation is also proposed in the thesis.
- Full Text:
- Date Issued: 2016
- Authors: Nkuntse, Tulani
- Date: 2016
- Subjects: Public administration -- South Africa -- Nelson Mandela Bay Municipality Local government -- South Africa -- Citizen participation South Africa -- Politics and government
- Language: English
- Type: Thesis , Masters , MA
- Identifier: http://hdl.handle.net/10948/11854 , vital:26982
- Description: This study undertook to examine public participation as a contributor to good governance in the Nelson Mandela Bay Municipality (NMBM), as part of the process of improving this Municipality’s governance. The main objectives of the study were to analyse the existing processes and arrangements for public participation in the NMBM; to examine the extent to which community participation influences decision-making; to investigate the factors that improve or lead to good governance in a municipal environment; to examine a framework for robust participation, in which communities are able to influence decisions that affect them; and to propose recommendations to potentially improve the Municipality’s governance. The triangulation research methodology was employed with emphasis on both the quantitative and qualitative methodologies. The sample comprised of two Ward Councillors, two selected Mayoral Committee members and 14 Ward Committee members. Questionnaires, with open and closed questions, were employed for the Ward Committee members and semi-structured interviews were conducted with both the Ward Councillors and the two Mayoral Committee members. Statistical procedures supplied by the NMMU Unit of Statistics were utilised to interpret and analyse the quantitative data to determine the results for data analysis. The qualitative data analysis involved thematic content analysis. The findings suggest that the current public participation processes are inadequate. The correlation of results further revealed that a significant negative relationship exists between the Ward Councillors, the Municipality and Ward Committee members. Despite various legislative prescriptions pertaining to public participation requirements in local government, the results suggest that the NMBM may be undertaking the public participation exercise for the sake of compliance and therefore it might not be a genuine exercise. The thesis proposes specific recommendations on how the NMBM can address the current shortcomings in terms of its public participation processes and strategies. Recommendations include significant civic education for the public to understand that being in a democratic country involves active participation in local affairs; more participatory initiatives need to be done to make the public aware of the role of Ward Committees and to invite people to apply to be on these Committees; recommendations also suggested that it would be crucial that Ward Committees are not used as a political platform to push political agendas, as this deters public participation. The NMBM needs to establish a monitoring and evaluation process to track their progress with public participation and develop and implement a public participation strategy and policy for enhanced public participation is also proposed in the thesis.
- Full Text:
- Date Issued: 2016