Applications of thermal spray technology for surface protection
- Authors: Gorlach, I A
- Subjects: Metal spraying , Surfaces (Technology)
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/21866 , vital:29795
- Description: With the rapid development of modern industry, the quality of surfaces of structures, products and components is important in terms of many aspects such as efficiency, reliability, appearance, maintenance costs and economy. A local failure on the surface usually causes the entire component to be rejected or it may lead to a failure of a machine or structure. It is estimated that in developed countries, the loss caused by corrosion is up to 2-4% of gross national product [1]. Thus, many countries have made great efforts to improve the surface performance of parts in order to enhance the reliability of mechanical equipment and prolong their service life.
- Full Text: false
- Authors: Gorlach, I A
- Subjects: Metal spraying , Surfaces (Technology)
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/21866 , vital:29795
- Description: With the rapid development of modern industry, the quality of surfaces of structures, products and components is important in terms of many aspects such as efficiency, reliability, appearance, maintenance costs and economy. A local failure on the surface usually causes the entire component to be rejected or it may lead to a failure of a machine or structure. It is estimated that in developed countries, the loss caused by corrosion is up to 2-4% of gross national product [1]. Thus, many countries have made great efforts to improve the surface performance of parts in order to enhance the reliability of mechanical equipment and prolong their service life.
- Full Text: false
Consumer health informatics in the information age and beyond
- Authors: Pottas, Dalenca
- Subjects: Medical informatics , Information technology , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20757 , vital:29386
- Description: This paper reviews current and future trends and challenges in the field of consumer health informatics. Emergent innovations driving consumer health informatics in the information age include devices, tools and applications supporting personalised healthcare, electronic personal health record (PHR) systems and a plethora of tools in the health social media domain. Within this domain, a new kind of social media citizen, the consumer specialist or patient opinion leader, is taking the lead in online communities of patients. A new generation of personal health records combining PHRs and social media is emerging, even though pervasive adoption and use of PHRs remains elusive. The accuracy of information, security and privacy of personal health information, legislative matters and the digital divide remain recurring challenges of consumer health informatics. In future, PHR vendors will have to address the lack of espousal of PHRs in innovative ways to provide a compelling case for adoption. The continued uptake of health social media necessitates efforts to understand, through longitudinal studies, precisely who the users are, what they use it for and how it contributes to the achievement of both personal and public health outcomes. Health information consumers, of varying levels of techno-literacy, needs and preferences, must be assisted to move from simply accessing information to distilling relevant and credible information and making informed decisions. Further research is required to understand the changing relationships between patients and healthcare providers and how consumer health information technologies can best support these. There is a need to evaluate the effectiveness of consumer health information technologies to inform both public policy and the next generation of tools, technologies and artefacts that could better facilitate improved health outcomes. Lastly, more effort is required to erode digital inequalities. As we move into a future emphasising both the global and the individual, accelerated connectedness and speed of change, consumer health informatics must respond such that it remains germane and amplifies the value that can be gained by all stakeholders.
- Full Text:
- Authors: Pottas, Dalenca
- Subjects: Medical informatics , Information technology , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20757 , vital:29386
- Description: This paper reviews current and future trends and challenges in the field of consumer health informatics. Emergent innovations driving consumer health informatics in the information age include devices, tools and applications supporting personalised healthcare, electronic personal health record (PHR) systems and a plethora of tools in the health social media domain. Within this domain, a new kind of social media citizen, the consumer specialist or patient opinion leader, is taking the lead in online communities of patients. A new generation of personal health records combining PHRs and social media is emerging, even though pervasive adoption and use of PHRs remains elusive. The accuracy of information, security and privacy of personal health information, legislative matters and the digital divide remain recurring challenges of consumer health informatics. In future, PHR vendors will have to address the lack of espousal of PHRs in innovative ways to provide a compelling case for adoption. The continued uptake of health social media necessitates efforts to understand, through longitudinal studies, precisely who the users are, what they use it for and how it contributes to the achievement of both personal and public health outcomes. Health information consumers, of varying levels of techno-literacy, needs and preferences, must be assisted to move from simply accessing information to distilling relevant and credible information and making informed decisions. Further research is required to understand the changing relationships between patients and healthcare providers and how consumer health information technologies can best support these. There is a need to evaluate the effectiveness of consumer health information technologies to inform both public policy and the next generation of tools, technologies and artefacts that could better facilitate improved health outcomes. Lastly, more effort is required to erode digital inequalities. As we move into a future emphasising both the global and the individual, accelerated connectedness and speed of change, consumer health informatics must respond such that it remains germane and amplifies the value that can be gained by all stakeholders.
- Full Text:
Guidelines for a job role based approach for Phishing awareness in an academic Institution
- Authors: Mahonga,Sandisiwe
- Date: 2021-12
- Subjects: Identity theft -- South Africa , Computer networks --Security measures
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55855 , vital:54394
- Description: Phishing attacks have become a perpetual threat to organisations and internet users in general. Phishing websites and emails impersonating well-known entities are launched frequently, with the intent to trick unsuspecting employees to give out sensitive information such as login details to acquire access to corporate networks. Various solutions have been developed to combat Phishing emails from reaching employees and internet users. However, security experts and Phishing attackers are in a race as Phishing attacks are also refined as solutions are developed. Thus, this raises a critical need for security awareness. Reports and Phishing studies have noted that Phishing attacks targeted towards specific job roles have been on the rise. Even though research studies and industry reports provided by organisations dedicated to information security have taken note of this phenomenon, not much guidance, recommendations or guidelines are provided on how Phishing awareness can be provided for the job roles that are most vulnerable to Phishing attacks. Therefore, the problem identified within this research is that there is a need for guidelines for a job role based approach for Phishing awareness. The primary research objective of this study, therefore, is to develop guidelines to aid towards a job role based approach for Phishing awareness. In order to meet the primary research objective, secondary research objectives were defined and met, namely; To determine the current state of Phishing trends facing organisations in relation to the job role of employees; to determine the level of Phishing awareness employees have; to identify security awareness elements from security awareness standards, best practices and frameworks; to integrate the identified security awareness elements from standards, best practices and frameworks including themes identified from the questionnaire results to formulate the proposed guidelines for a Phishing awareness approach that is relevant for the job role of employees in order to the formulate guidelines. 5 Mixed methods were used to achieve this study’s research objectives. The research methods used included a literature review which was used to define and provide an indepth discussion relating to the domain in which this study is contained, namely: Social engineering, Phishing and information security awareness and training. Furthermore, a survey which took the form of a questionnaire, was used ascertain the level of Phishing awareness amongst employees within an academic institution in South Africa. Argumentation was used to argue towards the proposed guidelines. Finally, an elite interview was conducted, in the form of a questionnaire, to evaluate the proposed guidelines. It is envisaged that the guidelines proposed for a job role Phishing awareness approach could assist organisations to equip employees in job roles that are vulnerable Phishing attacks with adequate awareness and training. , Thesis (MIT) -- Faculty of Engineering, the Built Environment and Information Technology, School of Information and Communication Technology, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Mahonga,Sandisiwe
- Date: 2021-12
- Subjects: Identity theft -- South Africa , Computer networks --Security measures
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/55855 , vital:54394
- Description: Phishing attacks have become a perpetual threat to organisations and internet users in general. Phishing websites and emails impersonating well-known entities are launched frequently, with the intent to trick unsuspecting employees to give out sensitive information such as login details to acquire access to corporate networks. Various solutions have been developed to combat Phishing emails from reaching employees and internet users. However, security experts and Phishing attackers are in a race as Phishing attacks are also refined as solutions are developed. Thus, this raises a critical need for security awareness. Reports and Phishing studies have noted that Phishing attacks targeted towards specific job roles have been on the rise. Even though research studies and industry reports provided by organisations dedicated to information security have taken note of this phenomenon, not much guidance, recommendations or guidelines are provided on how Phishing awareness can be provided for the job roles that are most vulnerable to Phishing attacks. Therefore, the problem identified within this research is that there is a need for guidelines for a job role based approach for Phishing awareness. The primary research objective of this study, therefore, is to develop guidelines to aid towards a job role based approach for Phishing awareness. In order to meet the primary research objective, secondary research objectives were defined and met, namely; To determine the current state of Phishing trends facing organisations in relation to the job role of employees; to determine the level of Phishing awareness employees have; to identify security awareness elements from security awareness standards, best practices and frameworks; to integrate the identified security awareness elements from standards, best practices and frameworks including themes identified from the questionnaire results to formulate the proposed guidelines for a Phishing awareness approach that is relevant for the job role of employees in order to the formulate guidelines. 5 Mixed methods were used to achieve this study’s research objectives. The research methods used included a literature review which was used to define and provide an indepth discussion relating to the domain in which this study is contained, namely: Social engineering, Phishing and information security awareness and training. Furthermore, a survey which took the form of a questionnaire, was used ascertain the level of Phishing awareness amongst employees within an academic institution in South Africa. Argumentation was used to argue towards the proposed guidelines. Finally, an elite interview was conducted, in the form of a questionnaire, to evaluate the proposed guidelines. It is envisaged that the guidelines proposed for a job role Phishing awareness approach could assist organisations to equip employees in job roles that are vulnerable Phishing attacks with adequate awareness and training. , Thesis (MIT) -- Faculty of Engineering, the Built Environment and Information Technology, School of Information and Communication Technology, 2021
- Full Text:
- Date Issued: 2021-12
ICT as an enabler of Socio Economic Development
- Authors: Van Greunen, Darrelle
- Subjects: Information technology , Digital divide , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20725 , vital:29383
- Description: Today’s is a world of many divides, one of the most typical being the Digital Divide, which in itself has given birth to or is worsening other economic and social divides. In this world, more suffer and less are able to benefit from technology. This paper aims to promote the importance of and need for inter-disciplinary cooperation for the use and promotion of Information and Communication Technologies (ICT) as a bridge for the Digital Divide within disciplines. Information and communication technologies (ICTs) include any communication device—radio, television, cellular phones, computer and network hardware and software, satellite systems, the services and applications associated with them, such as the Internet, geographic positioning systems (GPS), banking, e-health, e-learning and electronic government services. The paper will touch on tangible examples of inter-disciplinary cooperation and the use of ICT in different community interventions.
- Full Text:
- Authors: Van Greunen, Darrelle
- Subjects: Information technology , Digital divide , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20725 , vital:29383
- Description: Today’s is a world of many divides, one of the most typical being the Digital Divide, which in itself has given birth to or is worsening other economic and social divides. In this world, more suffer and less are able to benefit from technology. This paper aims to promote the importance of and need for inter-disciplinary cooperation for the use and promotion of Information and Communication Technologies (ICT) as a bridge for the Digital Divide within disciplines. Information and communication technologies (ICTs) include any communication device—radio, television, cellular phones, computer and network hardware and software, satellite systems, the services and applications associated with them, such as the Internet, geographic positioning systems (GPS), banking, e-health, e-learning and electronic government services. The paper will touch on tangible examples of inter-disciplinary cooperation and the use of ICT in different community interventions.
- Full Text:
Professional, personal and corporate ethics challenges during infrastructure delivery
- Authors: Dyariwe, Abongile
- Date: 2015-01
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53300 , vital:45131
- Description: Purpose of this treatise: This study is aimed at investigating whether there is a lack of professional- and, personal ethics, and a lack of enforcing corporate ethics from the Built environment professionals working for Eskom ECOU. Design/methodology/approach: The research approach used for the study was mainly quantitative. The quantitative methods used were descriptive and non-parametric statistical methods (Kruskal- Wallis Test and Mann-Whitney U Test). The selected sample for the study was categorised as internal stakeholders (i.e. employees that are permanently employed by Eskom) and external stakeholders (i.e. people that are employed by Eskom on a contract basis as quantity surveying, project management and engineering consultants) The scope of the study was to determine whether there are professional-, personal- and corporate ethical challenges in client organisations. A literature review was conducted; and all the relevant literature relating to professional-, personal- and corporate ethics in client organisations was collated, and then used to develop a questionnaire. The questionnaires were distributed to internal and external stakeholders, who were involved during infrastructural delivery in client organisations, in order to acquire different views on ethical perceptions. The data obtained from the questionnaires were analysed, and used to test if the hypotheses were supported or not. Findings: The findings of this study revealed that the demographic profile does not have any significant influence on the ratings of internal and external stakeholders’ perceptions of the lack of professional and personal ethics – or on the enforcement of corporate ethics. Furthermore, this study also revealed that there is no significant difference in the ethical perceptions of internal and external stakeholders, on the enforcement of a professional and corporate ethical culture. Lastly, only in the personal ethics section there is a significant difference in ethical perception. In relation to the statement of the problem, the findings of this study revealed that internal and external stakeholders’ lack of professional- and personal ethics and the enforcement of corporate ethics are largely unknown. Research limitations: This study was limited to only Built environment professionals (including service providers) working for Eskom ECOU. Practical implications: The study revealed that there are ethical challenges in client organisations, even though they might be largely unknown. This clearly shows that construction industry professionals are all susceptible to unethical behaviour. Therefore, Eskom ECOU should refrain from only focusing on unethical behaviour by contractors and consulting firms; and it should also look at the client’s Built environment professionals; because there is evidence that they are also suspect during infrastructural delivery. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Information Technology, School of the Built Environment and Civil Engineering, 2021
- Full Text:
- Date Issued: 2015-01
- Authors: Dyariwe, Abongile
- Date: 2015-01
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53300 , vital:45131
- Description: Purpose of this treatise: This study is aimed at investigating whether there is a lack of professional- and, personal ethics, and a lack of enforcing corporate ethics from the Built environment professionals working for Eskom ECOU. Design/methodology/approach: The research approach used for the study was mainly quantitative. The quantitative methods used were descriptive and non-parametric statistical methods (Kruskal- Wallis Test and Mann-Whitney U Test). The selected sample for the study was categorised as internal stakeholders (i.e. employees that are permanently employed by Eskom) and external stakeholders (i.e. people that are employed by Eskom on a contract basis as quantity surveying, project management and engineering consultants) The scope of the study was to determine whether there are professional-, personal- and corporate ethical challenges in client organisations. A literature review was conducted; and all the relevant literature relating to professional-, personal- and corporate ethics in client organisations was collated, and then used to develop a questionnaire. The questionnaires were distributed to internal and external stakeholders, who were involved during infrastructural delivery in client organisations, in order to acquire different views on ethical perceptions. The data obtained from the questionnaires were analysed, and used to test if the hypotheses were supported or not. Findings: The findings of this study revealed that the demographic profile does not have any significant influence on the ratings of internal and external stakeholders’ perceptions of the lack of professional and personal ethics – or on the enforcement of corporate ethics. Furthermore, this study also revealed that there is no significant difference in the ethical perceptions of internal and external stakeholders, on the enforcement of a professional and corporate ethical culture. Lastly, only in the personal ethics section there is a significant difference in ethical perception. In relation to the statement of the problem, the findings of this study revealed that internal and external stakeholders’ lack of professional- and personal ethics and the enforcement of corporate ethics are largely unknown. Research limitations: This study was limited to only Built environment professionals (including service providers) working for Eskom ECOU. Practical implications: The study revealed that there are ethical challenges in client organisations, even though they might be largely unknown. This clearly shows that construction industry professionals are all susceptible to unethical behaviour. Therefore, Eskom ECOU should refrain from only focusing on unethical behaviour by contractors and consulting firms; and it should also look at the client’s Built environment professionals; because there is evidence that they are also suspect during infrastructural delivery. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Information Technology, School of the Built Environment and Civil Engineering, 2021
- Full Text:
- Date Issued: 2015-01
Rethinking the informal settlements upgrading programmes in the Free State Province, South Africa: a transformative and multi-faceted model
- Authors: Sive Dintsi
- Date: 2022-04
- Subjects: Squatter settlements --South Africa -- Free State , City planning South Africa --Citizen participation
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55987 , vital:54561
- Description: This thesis intended to reveal the factors that contributed to the formulation of the informal settlements upgrading programmes in the Free State, South Africa, from an institutional perspective; subsequently to conceptualise a transformative and multi faceted model for the development and management of human settlements. The mixed methods exploratory research design has been applied in this study. This research design has allowed for the implementation of research methods including the qualitative inductive content analysis method, the case study method, and the semi structured survey questionnaire method. The data collection methods used comprised both primary and secondary data. Primary data involved online surveys and field observations. Secondary data comprised of an inductive analysis of written sources. The main findings of the study were as follows. First, the policy design and implementation processes have been misaligned. Second, there has been inadequate stakeholder engagements. Third, the government has not prioritised the employment of specialists in the field of housing and human settlements. Fourth, corruption has caused the state to fail to provide adequate housing for all. Fifth, municipalities are unable to identify and define existing informal settlements. Lastly, illegal immigration is causing a rapid increase in the number of informal settlements. This thesis proffered key recommendations based on the conclusions drawn from these findings. First, there must be an implementation of an integrated model for the preparation of upgrading policy. Second, communication technology education for officials of the state must be enhanced. Third, the government must prioritise the employment of experts in upgrading work. Fourth, the upgrading policy must reflect the paradigm shift from housing to human settlements. Fifth, municipalities need to be systematically transformed and improved for their functions on upgrading. Finally, illegal immigration must be firmly monitored while legal immigration is discouraged. To this end, this thesis has presented a strong viewpoint that limits the influx of immigrants into unproclaimed urban land that leads to the growth of informal settlements. The study has also strongly advocated for the legal spatial placement of South African citizens and legal immigrants on strategically and socio-economically viable land, where it is suitably available and owned by the state. Housing in the thesis has been viewed as one of the essential instruments that must inevitably emerge as a prospect towards xiv effectively unlocking improved living conditions in informal settlements; rather than housing being perceived as human settlements. , Thesis (PhD) -- Faculty of Engineering, the Built Environment and Information Technology, School of the Built Environment, 2022
- Full Text:
- Date Issued: 2022-04
- Authors: Sive Dintsi
- Date: 2022-04
- Subjects: Squatter settlements --South Africa -- Free State , City planning South Africa --Citizen participation
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55987 , vital:54561
- Description: This thesis intended to reveal the factors that contributed to the formulation of the informal settlements upgrading programmes in the Free State, South Africa, from an institutional perspective; subsequently to conceptualise a transformative and multi faceted model for the development and management of human settlements. The mixed methods exploratory research design has been applied in this study. This research design has allowed for the implementation of research methods including the qualitative inductive content analysis method, the case study method, and the semi structured survey questionnaire method. The data collection methods used comprised both primary and secondary data. Primary data involved online surveys and field observations. Secondary data comprised of an inductive analysis of written sources. The main findings of the study were as follows. First, the policy design and implementation processes have been misaligned. Second, there has been inadequate stakeholder engagements. Third, the government has not prioritised the employment of specialists in the field of housing and human settlements. Fourth, corruption has caused the state to fail to provide adequate housing for all. Fifth, municipalities are unable to identify and define existing informal settlements. Lastly, illegal immigration is causing a rapid increase in the number of informal settlements. This thesis proffered key recommendations based on the conclusions drawn from these findings. First, there must be an implementation of an integrated model for the preparation of upgrading policy. Second, communication technology education for officials of the state must be enhanced. Third, the government must prioritise the employment of experts in upgrading work. Fourth, the upgrading policy must reflect the paradigm shift from housing to human settlements. Fifth, municipalities need to be systematically transformed and improved for their functions on upgrading. Finally, illegal immigration must be firmly monitored while legal immigration is discouraged. To this end, this thesis has presented a strong viewpoint that limits the influx of immigrants into unproclaimed urban land that leads to the growth of informal settlements. The study has also strongly advocated for the legal spatial placement of South African citizens and legal immigrants on strategically and socio-economically viable land, where it is suitably available and owned by the state. Housing in the thesis has been viewed as one of the essential instruments that must inevitably emerge as a prospect towards xiv effectively unlocking improved living conditions in informal settlements; rather than housing being perceived as human settlements. , Thesis (PhD) -- Faculty of Engineering, the Built Environment and Information Technology, School of the Built Environment, 2022
- Full Text:
- Date Issued: 2022-04
The design of a youth activity Centre for Parkside, East London
- Authors: De Lange, Natasha
- Date: 2021-04
- Subjects: Youth centers -- South Africa -- East London -- Designs and plans , Community centers -- South Africa -- East London
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/57479 , vital:57880
- Description: The identity of youth is an important developmental pro - cess in young people’s lives. Youth Centres in South Africa mainly focus on reproductive health services and as a result thereof, are experiencing low visitor num - bers and failing to captivate the youth whom they aim to serve. The very nature in which this takes place today, opens the door for an architectural intervention that has the potential to facilitate and improve this process. This thesis aims to address the issues that today’s youth faces by looking at the metaphorical representa - tion of the ‘street’ as the current place where the youth of today spend their time testing and developing their identity. It aims to rethink the youth centre as a place that combines youth culture and architecture to create a space which provides adequate recreational opportu - nities, and through which youths can reconnect to their surroundings - giving them a much-needed sense of place and identity within the ever-changing city. The idea is ultimately to design a Youth Activity Centre for the Parkside neighbourhood in East London - a de - sign which can express how youth identity can impact architecture in a way that can benefit the development of youth’s identity, and which can re-animate the nature of the ‘street’ through architecture. , Thesis (MArch) -- Faculty of Engineering, the Built Environment and Information Technology, School of Architecture, 2021
- Full Text:
- Date Issued: 2021-04
- Authors: De Lange, Natasha
- Date: 2021-04
- Subjects: Youth centers -- South Africa -- East London -- Designs and plans , Community centers -- South Africa -- East London
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/57479 , vital:57880
- Description: The identity of youth is an important developmental pro - cess in young people’s lives. Youth Centres in South Africa mainly focus on reproductive health services and as a result thereof, are experiencing low visitor num - bers and failing to captivate the youth whom they aim to serve. The very nature in which this takes place today, opens the door for an architectural intervention that has the potential to facilitate and improve this process. This thesis aims to address the issues that today’s youth faces by looking at the metaphorical representa - tion of the ‘street’ as the current place where the youth of today spend their time testing and developing their identity. It aims to rethink the youth centre as a place that combines youth culture and architecture to create a space which provides adequate recreational opportu - nities, and through which youths can reconnect to their surroundings - giving them a much-needed sense of place and identity within the ever-changing city. The idea is ultimately to design a Youth Activity Centre for the Parkside neighbourhood in East London - a de - sign which can express how youth identity can impact architecture in a way that can benefit the development of youth’s identity, and which can re-animate the nature of the ‘street’ through architecture. , Thesis (MArch) -- Faculty of Engineering, the Built Environment and Information Technology, School of Architecture, 2021
- Full Text:
- Date Issued: 2021-04
The Effectiveness of Eskom’s transmission project team lationships in the delivery process
- Authors: Mpetshwa, Noninzi
- Date: 2015-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53318 , vital:45137
- Description: Eskom Holding is a public limited liability company that supplies electricity. It supplies approximately ninety-nine percent of the electricity used in South Africa, and approximately forty-five percent of that used in Africa. Eskom generates, transmits and distributes electricity to its customers. The Project Execution Department is a department in the Transmission Division that executes the capital and refurbishment of projects. The objective of the study was to discover the opinion of the project team members, on whether there is a lack of project-team efficiency in delivering the projects on time, and within the budget. Descriptive research methodology was used to investigate the objectives of the research. The data were obtained through the structured questionnaires that were hand-delivered and emailed. The research is limited to the Project Execution and Procurement Department in the Transmission Division. The research excludes the Capital Expansion Department (CED) project (Medupi, Kusile and Power Development Projects). The findings of the study showed that, Eskom’s Transmission Project Execution and Commercial Departments need to work hand-in-hand. This will avoid any unnecessary procurement delays which would have an impact on project delivery time. Continuous communication among the project team members could improve the efficiency and serve to build good relationships. Currently, projects are delivered late and over budget. This situation could lead to the outsourcing of departments or even to the redeployment of Senior Management. It would also have a negative impact on the cost and supply of electricity to the country. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Information Technology, School of the Built Environment and Civil Engineering, 2021
- Full Text:
- Date Issued: 2015-04
- Authors: Mpetshwa, Noninzi
- Date: 2015-04
- Subjects: Port Elizabeth (South Africa) , Eastern Cape (South Africa) , South Africa
- Language: English
- Type: Master's theses , text
- Identifier: http://hdl.handle.net/10948/53318 , vital:45137
- Description: Eskom Holding is a public limited liability company that supplies electricity. It supplies approximately ninety-nine percent of the electricity used in South Africa, and approximately forty-five percent of that used in Africa. Eskom generates, transmits and distributes electricity to its customers. The Project Execution Department is a department in the Transmission Division that executes the capital and refurbishment of projects. The objective of the study was to discover the opinion of the project team members, on whether there is a lack of project-team efficiency in delivering the projects on time, and within the budget. Descriptive research methodology was used to investigate the objectives of the research. The data were obtained through the structured questionnaires that were hand-delivered and emailed. The research is limited to the Project Execution and Procurement Department in the Transmission Division. The research excludes the Capital Expansion Department (CED) project (Medupi, Kusile and Power Development Projects). The findings of the study showed that, Eskom’s Transmission Project Execution and Commercial Departments need to work hand-in-hand. This will avoid any unnecessary procurement delays which would have an impact on project delivery time. Continuous communication among the project team members could improve the efficiency and serve to build good relationships. Currently, projects are delivered late and over budget. This situation could lead to the outsourcing of departments or even to the redeployment of Senior Management. It would also have a negative impact on the cost and supply of electricity to the country. , Thesis (MSc) -- Faculty of Engineering, the Built Environment and Information Technology, School of the Built Environment and Civil Engineering, 2021
- Full Text:
- Date Issued: 2015-04
Ultra-high precision machining of rapidly solidified aluminium (RSA) alloys for optics
- Authors: Odedeyi, Peter Babatunde
- Date: 2021-12
- Subjects: Mechatronics Surface roughness -- Measurement
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55921 , vital:54400
- Description: The advancement of ultra-precision is one of the most adaptable machining processes in the manufacturing of very complex and high-quality surface structures for optics, industrial, medical, aerospace and communication applications. Studies have shown that single-point diamond turning has an outstanding ability to machine high-quality optical components at a nanometric scale. However, in a responsive cutting process, the nanometric machinability of these optical components can easily be affected by several factors. The call for increasing needs of optical systems has recently led to the development of newly modified aluminium grades of non-ferrous alloys characterized by finer microstructures, defined mechanical and physical properties. To date, there has been a lack of sufficient research into these new aluminium alloys. In modern ultra-precision machining, the high demands for smart and inexpensive cutting tools are becoming more relevant in recent precision machines. In monitoring and predicting high-quality surface, cutting forces in single point diamond turning are believed to be as critical as other machining processes due to their potential effects on the quality of surface roughness. Undermining such an important factor is a compromise between the machining process's efficiency and the increased cost of production. Therefore, a comprehensive scientific understanding of the Nano-cutting mechanics is critical, particularly on modelling and analysis of cutting force, surface roughness, chip vii formation, acoustic emission, material removal rates, and molecular dynamic simulation of the rapidly solidified aluminium alloys to bridge the gap between fundamentals and industrial-scale application. The study is divided into three essential sections. First, the development of a force sensor. Secondly, investigation of the effect of cutting parameters (i.e., cutting speed, feed rate, and cutting depth) on cutting force, acoustic emission (AE), material removal rate (MRR), chip formation, Nose radius, and surface roughness (Ra), which play a leading role in the determination of machine productivity and efficiency of single-point diamond turning of rapidly solidified aluminium alloys. Thirdly, a 3-D molecular dynamic (MD) simulation of RSA 6061 is also carried out to further understand the nanometric mechanism and characterization of the alloy. The experiment was mainly conducted using Precitech Nanoform ultra-grind 250 lathe machines on three different advanced optical aluminium alloys materials; these are RSA 443, RSA 905, and RSA 6061. , Thesis (PhD) -- Faculty of Engineering, the Built Environment and Information Technology, School of Engineering, 2021
- Full Text:
- Date Issued: 2021-12
- Authors: Odedeyi, Peter Babatunde
- Date: 2021-12
- Subjects: Mechatronics Surface roughness -- Measurement
- Language: English
- Type: Doctoral theses , text
- Identifier: http://hdl.handle.net/10948/55921 , vital:54400
- Description: The advancement of ultra-precision is one of the most adaptable machining processes in the manufacturing of very complex and high-quality surface structures for optics, industrial, medical, aerospace and communication applications. Studies have shown that single-point diamond turning has an outstanding ability to machine high-quality optical components at a nanometric scale. However, in a responsive cutting process, the nanometric machinability of these optical components can easily be affected by several factors. The call for increasing needs of optical systems has recently led to the development of newly modified aluminium grades of non-ferrous alloys characterized by finer microstructures, defined mechanical and physical properties. To date, there has been a lack of sufficient research into these new aluminium alloys. In modern ultra-precision machining, the high demands for smart and inexpensive cutting tools are becoming more relevant in recent precision machines. In monitoring and predicting high-quality surface, cutting forces in single point diamond turning are believed to be as critical as other machining processes due to their potential effects on the quality of surface roughness. Undermining such an important factor is a compromise between the machining process's efficiency and the increased cost of production. Therefore, a comprehensive scientific understanding of the Nano-cutting mechanics is critical, particularly on modelling and analysis of cutting force, surface roughness, chip vii formation, acoustic emission, material removal rates, and molecular dynamic simulation of the rapidly solidified aluminium alloys to bridge the gap between fundamentals and industrial-scale application. The study is divided into three essential sections. First, the development of a force sensor. Secondly, investigation of the effect of cutting parameters (i.e., cutting speed, feed rate, and cutting depth) on cutting force, acoustic emission (AE), material removal rate (MRR), chip formation, Nose radius, and surface roughness (Ra), which play a leading role in the determination of machine productivity and efficiency of single-point diamond turning of rapidly solidified aluminium alloys. Thirdly, a 3-D molecular dynamic (MD) simulation of RSA 6061 is also carried out to further understand the nanometric mechanism and characterization of the alloy. The experiment was mainly conducted using Precitech Nanoform ultra-grind 250 lathe machines on three different advanced optical aluminium alloys materials; these are RSA 443, RSA 905, and RSA 6061. , Thesis (PhD) -- Faculty of Engineering, the Built Environment and Information Technology, School of Engineering, 2021
- Full Text:
- Date Issued: 2021-12
Ultra-high precision manufacturing
- Authors: Abou-El-Hossein, Khaled
- Subjects: Machining , Diamond turning , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20878 , vital:29410
- Description: One of the engineering areas focusing on the research and development of highvalue components and manufacturing technologies is precision engineering. Precision engineering represents a variety of engineering and science disciplines ranging from areas such as mechanical, electronics and industrial engineering to chemistry, physics, optics and materials science. This paper aims at familiarising the reader with the recent advances in ultra-high precision manufacturing technologies and their applications for the production of various critical components employed in different sectors of the industry. In this paper, the principles of ultra-high precision manufacturing will be discussed followed by examples of its use in various industrial applications. The status of ultra-high precision manufacturing in terms of current research issues and future trends will be discussed. In addition, research activities and projects in the area of precision manufacturing that are currently conducted at the NMMU will be also highlighted. Finally, the author looks forward to presenting herewith comprehensive information that could be useful to the reader and easy to understand by the bigger NMMU’s community.
- Full Text:
- Authors: Abou-El-Hossein, Khaled
- Subjects: Machining , Diamond turning , f-sa
- Language: English
- Type: text , Lectures
- Identifier: http://hdl.handle.net/10948/20878 , vital:29410
- Description: One of the engineering areas focusing on the research and development of highvalue components and manufacturing technologies is precision engineering. Precision engineering represents a variety of engineering and science disciplines ranging from areas such as mechanical, electronics and industrial engineering to chemistry, physics, optics and materials science. This paper aims at familiarising the reader with the recent advances in ultra-high precision manufacturing technologies and their applications for the production of various critical components employed in different sectors of the industry. In this paper, the principles of ultra-high precision manufacturing will be discussed followed by examples of its use in various industrial applications. The status of ultra-high precision manufacturing in terms of current research issues and future trends will be discussed. In addition, research activities and projects in the area of precision manufacturing that are currently conducted at the NMMU will be also highlighted. Finally, the author looks forward to presenting herewith comprehensive information that could be useful to the reader and easy to understand by the bigger NMMU’s community.
- Full Text:
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