- Identifier: http://hdl.handle.net/${Handle} , uj:23369
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:23811
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:25126
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:26879
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:27048
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:27065
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:27508
- Full Text:
- Identifier: http://hdl.handle.net/${Handle} , uj:27897
- Full Text:
A review of expert involvement in developing mHealth applications for diabetes self‐management
- Authors: Dinath, Wafeequa
- Date: 2019
- Subjects: Mobile health applications , Type 1 Diabetes Mellitus , Diabetes self‐management
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:32819 , Citation: Dinath, W. 2019. A review of expert involvement in developing mHealth applications for diabetes self‐management.
- Description: Abstract: Mobile health (mHealth) applications for the self‐management of Type 1 Diabetes Mellitus (T1DM) are said to have great potential to assist individuals living with T1DM manage their illness more effectively. However, the lack of expert involvement in the development of these mHealth applications pose a serious risk to the consumers. mHealth applications that provide medical advice that is incorrect can harm users that rely on the mHealth application to treat their illness. For this reason, the study reviewed healthcare practitioner and scientific association involvement in the development of mHealth applications for diabetes self‐management. A systematic search comprising of specific search terms, was carried out on Google’s Play Store for mHealth applications intended for managing T1DM. These applications were then reviewed in order to determine the target market, category, developer, date that the application was last updated, price as well as whether a healthcare practitioner or diabetes association took part in the development of the mHealth application. A total of 584 mHealth applications were found on Google Play Store but only 321 mHealth applications met the criteria. In terms of the target market, 77.22% of the applications were targeted towards consumers and only 19.8% were targeted towards healthcare professionals. In terms of category, 48.51% of applications were classified under health and fitness and 45.54% under medical, leading consumers to believe that these applications are credible. In terms of expert involvement in the development of the applications, 31.68% of the applications had scientific society involvement whereas only 28.71% of the applications had healthcare professional involvement. Even though an increasing amount of consumers are turning to mHealth applications to assist them with managing their health, expert involvement in the development of mHealth applications for diabetes self‐management is insufficient. Until this issue is officially addressed, application developers should acquire expert involvement when developing these applications. If consumers can tell which applications are credible, the risks associated with using the applications to help manage their illness will be less.
- Full Text:
- Authors: Dinath, Wafeequa
- Date: 2019
- Subjects: Mobile health applications , Type 1 Diabetes Mellitus , Diabetes self‐management
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:32819 , Citation: Dinath, W. 2019. A review of expert involvement in developing mHealth applications for diabetes self‐management.
- Description: Abstract: Mobile health (mHealth) applications for the self‐management of Type 1 Diabetes Mellitus (T1DM) are said to have great potential to assist individuals living with T1DM manage their illness more effectively. However, the lack of expert involvement in the development of these mHealth applications pose a serious risk to the consumers. mHealth applications that provide medical advice that is incorrect can harm users that rely on the mHealth application to treat their illness. For this reason, the study reviewed healthcare practitioner and scientific association involvement in the development of mHealth applications for diabetes self‐management. A systematic search comprising of specific search terms, was carried out on Google’s Play Store for mHealth applications intended for managing T1DM. These applications were then reviewed in order to determine the target market, category, developer, date that the application was last updated, price as well as whether a healthcare practitioner or diabetes association took part in the development of the mHealth application. A total of 584 mHealth applications were found on Google Play Store but only 321 mHealth applications met the criteria. In terms of the target market, 77.22% of the applications were targeted towards consumers and only 19.8% were targeted towards healthcare professionals. In terms of category, 48.51% of applications were classified under health and fitness and 45.54% under medical, leading consumers to believe that these applications are credible. In terms of expert involvement in the development of the applications, 31.68% of the applications had scientific society involvement whereas only 28.71% of the applications had healthcare professional involvement. Even though an increasing amount of consumers are turning to mHealth applications to assist them with managing their health, expert involvement in the development of mHealth applications for diabetes self‐management is insufficient. Until this issue is officially addressed, application developers should acquire expert involvement when developing these applications. If consumers can tell which applications are credible, the risks associated with using the applications to help manage their illness will be less.
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Accounting Studies 100
- Authors: University of Johannesburg
- Date: December 2014
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:20061 , AST1B01
- Description: Exam paper (Supplementary) for second semester
- Full Text:
- Authors: University of Johannesburg
- Date: December 2014
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:20061 , AST1B01
- Description: Exam paper (Supplementary) for second semester
- Full Text:
Advanced Property Valuation and Management B
- Authors: University of Johannesburg
- Date: October 2015
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:17197 , PVM02X7 , PVM8X02
- Description: Exam paper for second semester Advanced Property Valuation and Management B
- Full Text: false
- Authors: University of Johannesburg
- Date: October 2015
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:17197 , PVM02X7 , PVM8X02
- Description: Exam paper for second semester Advanced Property Valuation and Management B
- Full Text: false
An exploratory study of the causes of failure in construction small businesses : a case of the Johannesburg construction industry, South Africa
- Eke, Chikezie, Aigbavboa, Clinton, Thwala, Wellington Didibhuku
- Authors: Eke, Chikezie , Aigbavboa, Clinton , Thwala, Wellington Didibhuku
- Date: 2015
- Subjects: Construction industry , Construction small businesses , Market environment
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/${Handle} , uj:17850 , Citatation: Eke, C., Aigbavboa, C & Thwala, W. 2015. An exploratory study of the causes of failure in construction small businesses : a case of the Johannesburg construction industry, South Africa.
- Description: Abstract: The objective of this study is to explore the causes of small businesses failure within the Johannesburg construction industry, a metropolitan municipality in the Gauteng province of South Africa. The data for the study was collected through a structured questionnaire survey distributed to a sample of 30 owners of small and medium construction companies in Gauteng. The research respondents were construction professionals who work in SMEs. The survey results shown that the major causes of small business failure can be divided into two aspects- which are external and internal. The internal factor revealed from the study include- lack of financial managerial ability and general administration of the business. The study findings revealed the urgent areas that small construction businesses need to be supported in order for them to be sustainable which in order guarantee job security for construction professionals who are employed in these companies; thus contributing to the macroeconomic indicators of the economy.
- Full Text:
- Authors: Eke, Chikezie , Aigbavboa, Clinton , Thwala, Wellington Didibhuku
- Date: 2015
- Subjects: Construction industry , Construction small businesses , Market environment
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/${Handle} , uj:17850 , Citatation: Eke, C., Aigbavboa, C & Thwala, W. 2015. An exploratory study of the causes of failure in construction small businesses : a case of the Johannesburg construction industry, South Africa.
- Description: Abstract: The objective of this study is to explore the causes of small businesses failure within the Johannesburg construction industry, a metropolitan municipality in the Gauteng province of South Africa. The data for the study was collected through a structured questionnaire survey distributed to a sample of 30 owners of small and medium construction companies in Gauteng. The research respondents were construction professionals who work in SMEs. The survey results shown that the major causes of small business failure can be divided into two aspects- which are external and internal. The internal factor revealed from the study include- lack of financial managerial ability and general administration of the business. The study findings revealed the urgent areas that small construction businesses need to be supported in order for them to be sustainable which in order guarantee job security for construction professionals who are employed in these companies; thus contributing to the macroeconomic indicators of the economy.
- Full Text:
An investigation of leadership characteristics of project and construction managers in the South African construction industry
- Liphadzi, Murendeni, Aigbavboa, Clinton, Thwala, Wellington Didibhuku
- Authors: Liphadzi, Murendeni , Aigbavboa, Clinton , Thwala, Wellington Didibhuku
- Date: 2015
- Subjects: Construction industry , Construction managers , Leadership
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:18432 , Citation: Liphadzi, M., Aigbavboa, C. & Thwala, W. 2015. An investigation of leadership characteristics of project and construction managers in the South African construction industry.
- Description: Abstract: The construction industry is different from other industries due to its unique characteristics. Moreover, construction projects involve different individuals and organizations which are all gathered to achieve a specific task at a specific time. However, South African construction projects sometimes face challenges relating to quality and cost overruns. This challenges can also be attributed to ineffective leadership in the South African construction industry. Therefore, it is important to evaluate leadership in the South African construction industry. Effective leadership can improve construction productivity, where its outcomes include effectiveness, satisfaction, and project success. The main objective of the study is to identify leading characteristics of construction and project managers in the South African construction industry which influence the success of construction projects. The data used in this research were derived from both primary and secondary sources. The secondary data was collected via a detailed review of related literature. The primary data was collected through a well structured questionnaire aimed at 150 projects and construction managers in the South African construction industry, 110 questionnaires were received (73% response rate). Data was analysis using statkon SPSS software, whereby frequecises and descriptive was attained. Findings from the study indicate that the main leading characteristics which influence the success of construction projects include monitoring for results, problem solving and informed judgment, team building, initiative, influencing, communication, visioning, planning and goal setting, time management, sense of responsibility, empowerment, discipline, ethics, positive expectations, conceptualization, and conflict resolution. Based on the outcomes of this study it is clear that leadership characteristics of a project and construction manager are important, to establish success from a construction project.
- Full Text:
- Authors: Liphadzi, Murendeni , Aigbavboa, Clinton , Thwala, Wellington Didibhuku
- Date: 2015
- Subjects: Construction industry , Construction managers , Leadership
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:18432 , Citation: Liphadzi, M., Aigbavboa, C. & Thwala, W. 2015. An investigation of leadership characteristics of project and construction managers in the South African construction industry.
- Description: Abstract: The construction industry is different from other industries due to its unique characteristics. Moreover, construction projects involve different individuals and organizations which are all gathered to achieve a specific task at a specific time. However, South African construction projects sometimes face challenges relating to quality and cost overruns. This challenges can also be attributed to ineffective leadership in the South African construction industry. Therefore, it is important to evaluate leadership in the South African construction industry. Effective leadership can improve construction productivity, where its outcomes include effectiveness, satisfaction, and project success. The main objective of the study is to identify leading characteristics of construction and project managers in the South African construction industry which influence the success of construction projects. The data used in this research were derived from both primary and secondary sources. The secondary data was collected via a detailed review of related literature. The primary data was collected through a well structured questionnaire aimed at 150 projects and construction managers in the South African construction industry, 110 questionnaires were received (73% response rate). Data was analysis using statkon SPSS software, whereby frequecises and descriptive was attained. Findings from the study indicate that the main leading characteristics which influence the success of construction projects include monitoring for results, problem solving and informed judgment, team building, initiative, influencing, communication, visioning, planning and goal setting, time management, sense of responsibility, empowerment, discipline, ethics, positive expectations, conceptualization, and conflict resolution. Based on the outcomes of this study it is clear that leadership characteristics of a project and construction manager are important, to establish success from a construction project.
- Full Text:
Business Management 2A
- Authors: University of Johannesburg
- Date: June 2017
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:26322 , BMA2A01 , BMA12A1
- Description: Exam paper for first semester 2017
- Full Text: false
- Authors: University of Johannesburg
- Date: June 2017
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:26322 , BMA2A01 , BMA12A1
- Description: Exam paper for first semester 2017
- Full Text: false
CASE Disability survey for the Department of Health. Chapter 6
- Community Agency for Social Enquiry (South Africa)
Community Development and Leadership: Theories Related to Participatory Community Practice (Sup)
- Authors: University of Johannesburg
- Date: January 2019
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:32757 , CDL1B21
- Description: Exam paper (Supplementary) for second semester 2018
- Full Text:
- Authors: University of Johannesburg
- Date: January 2019
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:32757 , CDL1B21
- Description: Exam paper (Supplementary) for second semester 2018
- Full Text:
Corrosion behaviour of Al-Fe-Ti-V medium entropy alloy
- Bodunrin, M.O., Obadele, B.A., Chown, L.H., Olubambi, P.A.
- Authors: Bodunrin, M.O. , Obadele, B.A. , Chown, L.H. , Olubambi, P.A.
- Date: 2017
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:27130 , Citation: Bodunrin, M.O. et al. 2017. Corrosion behaviour of Al-Fe-Ti-V medium entropy alloy.
- Description: Abstract: Alloys containing up to four multi-principal elements in equiatomic ratios are referred to as medium entropy alloys (MEA). These alloys have attracted the interest of many researchers due to the superior mechanical properties it offers over the traditional alloys. The design approach of MEA often results to simple solid solution with either body centered cubic; face centered cubic structures or both. As the consideration for introducing the alloys into several engineering application increases, there have been efforts to study the corrosion behaviour of these alloys. Previous reports have shown that some of these alloys are more susceptible to corrosion when compared with traditional alloys due to lack of protective passive film. In this research, we have developed AlFeTiV medium entropy alloys containing two elements (Ti and Al) that readily passivate when exposed to corrosive solutions. The alloys were produced in vacuum arc furnace purged with high purity argon. Open circuit potential and potentiodynamic polarisation tests were used to evaluate the corrosion behaviour of the as-cast AlFeTiV alloy in 3.5 wt% NaCl and 1 M H2SO4. The corrosion performance of the alloy was compared with Ti- 6Al-4V alloy tested under similar conditions. The results show that unlike in Ti-6Al-4V alloy, the open circuit potential of the AlFeTiV alloy move towards the negative values in both 3.5 wt% NaCl and 1 M H2SO4 solutions indicating that self-activation occurred rapidly on immersion. Anodic polarisation of the alloys showed that AlFeTiV alloy exhibited a narrow range of passivity in both solutions. In addition, the alloys exhibited lower Ecorr and higher Icorr when compared with traditional Ti-6Al-4V alloy. The traditional Ti-6Al-4V alloy showed superior corrosion resistant to the AlFeTiV alloy in both 3.5 wt.% NaCl and 1 M H2SO4 solutions.
- Full Text:
- Authors: Bodunrin, M.O. , Obadele, B.A. , Chown, L.H. , Olubambi, P.A.
- Date: 2017
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:27130 , Citation: Bodunrin, M.O. et al. 2017. Corrosion behaviour of Al-Fe-Ti-V medium entropy alloy.
- Description: Abstract: Alloys containing up to four multi-principal elements in equiatomic ratios are referred to as medium entropy alloys (MEA). These alloys have attracted the interest of many researchers due to the superior mechanical properties it offers over the traditional alloys. The design approach of MEA often results to simple solid solution with either body centered cubic; face centered cubic structures or both. As the consideration for introducing the alloys into several engineering application increases, there have been efforts to study the corrosion behaviour of these alloys. Previous reports have shown that some of these alloys are more susceptible to corrosion when compared with traditional alloys due to lack of protective passive film. In this research, we have developed AlFeTiV medium entropy alloys containing two elements (Ti and Al) that readily passivate when exposed to corrosive solutions. The alloys were produced in vacuum arc furnace purged with high purity argon. Open circuit potential and potentiodynamic polarisation tests were used to evaluate the corrosion behaviour of the as-cast AlFeTiV alloy in 3.5 wt% NaCl and 1 M H2SO4. The corrosion performance of the alloy was compared with Ti- 6Al-4V alloy tested under similar conditions. The results show that unlike in Ti-6Al-4V alloy, the open circuit potential of the AlFeTiV alloy move towards the negative values in both 3.5 wt% NaCl and 1 M H2SO4 solutions indicating that self-activation occurred rapidly on immersion. Anodic polarisation of the alloys showed that AlFeTiV alloy exhibited a narrow range of passivity in both solutions. In addition, the alloys exhibited lower Ecorr and higher Icorr when compared with traditional Ti-6Al-4V alloy. The traditional Ti-6Al-4V alloy showed superior corrosion resistant to the AlFeTiV alloy in both 3.5 wt.% NaCl and 1 M H2SO4 solutions.
- Full Text:
Cost and Financial Management 1B
- Authors: University of Johannesburg
- Date: November 2015
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:16967 , CFM11B1 , CFM1BB1
- Description: Exam paper for second semester: Cost and Financial Management 1B
- Full Text:
- Authors: University of Johannesburg
- Date: November 2015
- Language: English
- Type: Exam paper
- Identifier: http://hdl.handle.net/${Handle} , uj:16967 , CFM11B1 , CFM1BB1
- Description: Exam paper for second semester: Cost and Financial Management 1B
- Full Text:
Critical factors influencing success of infrastructure projects
- Makabate, Choeu T., Wessels, Arie, Musonda, Innocent, Okoro, Chioma S.
- Authors: Makabate, Choeu T. , Wessels, Arie , Musonda, Innocent , Okoro, Chioma S.
- Date: 2018
- Subjects: Construction industry , Critical success factors , Project success
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:29888 , Citation: Makabate, C.T. et al. 2018. Critical factors influencing success of infrastructure projects.
- Description: Abstract: Infrastructure projects that do not meet organisations' goals and objectives can have a negative impact on organisations, stakeholders and end–users. Studies have been conducted by various researchers to identify critical success factors (CSFs) that influence the successful outcomes of infrastructure projects. The main objective of the study discussed in this paper was to identify critical factors influencing project success. Questionnaires were devised from literature review and administered to construction industry professionals which included project team members, line managers and project managers. Based on the findings, political influence, adequate planning, project manager competence and adequate funding were ranked the highest critical success factors. The research findings are focused to assist industry professionals gain better understanding on key areas based on prioritised success factors in order to improve performance in project delivery.
- Full Text:
- Authors: Makabate, Choeu T. , Wessels, Arie , Musonda, Innocent , Okoro, Chioma S.
- Date: 2018
- Subjects: Construction industry , Critical success factors , Project success
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:29888 , Citation: Makabate, C.T. et al. 2018. Critical factors influencing success of infrastructure projects.
- Description: Abstract: Infrastructure projects that do not meet organisations' goals and objectives can have a negative impact on organisations, stakeholders and end–users. Studies have been conducted by various researchers to identify critical success factors (CSFs) that influence the successful outcomes of infrastructure projects. The main objective of the study discussed in this paper was to identify critical factors influencing project success. Questionnaires were devised from literature review and administered to construction industry professionals which included project team members, line managers and project managers. Based on the findings, political influence, adequate planning, project manager competence and adequate funding were ranked the highest critical success factors. The research findings are focused to assist industry professionals gain better understanding on key areas based on prioritised success factors in order to improve performance in project delivery.
- Full Text:
Determination of Thermal and Rheological properties of Biodiesel fuels from Algae and Blends
- Eloka-Eboka, Andrew C., Inambao, Freddie, Laseinde, Opeyeolu T.
- Authors: Eloka-Eboka, Andrew C. , Inambao, Freddie , Laseinde, Opeyeolu T.
- Date: 2018
- Subjects: Thermal properties , Rheological , Viscosity
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:30683 , Citation: Eloka-Eboka, A.C., Inambao, F. & Laseinde, O.T. 2018. Determination of Thermal and Rheological properties of Biodiesel fuels from Algae and Blends.
- Description: Abstract: Comparative investigation and assessment of thermal and rheological properties of biodiesel fuels from micro algae was carried out with the aim of assessing micro-algal technology as a viable biodiesel production option. Chlorella vulgaris and Synedesmus spp were collected, cultured and cultivated in the open pond and in photobioreactor differently and inoculated with Agar broth media for twenty-three and sixteen days respectively for biomass production/accumulation. Thermal parameters and rheological properties were studied. Viscosity is one of the most critical feature of a fuel or biofuel. It plays a dominant role in fuel spray, fuel-air mixture formation and the combustion process. Fuels are sprayed into compressed air and atomized into small droplets near the nozzle exit in any diesel engine. In the combustion chamber, fuel forms cone-shaped spray at the nozzle exits which impacts the viscosity and also affects the atomization quality, penetration and size of fuel droplets. Density is an important fuel property that influences the amount of fuel injected into the engine cylinder. Changes in fuel density influences engine output power due to different mass of the fuel being injected, and this directly affects engine performance characteristics and emissions. TGA conducted reveals stability of algal oil and biodiesel after thermal treatment. With studies of viscosity and shear stress at varying speeds and temperature being evaluated, the interaction of viscosity at different torque presented in this study decreases from 20rpm to 60rpm but increases in shear stress at temperatures of 40o and 60o. Across temperature was a general initial decrease and later increase from lower temperatures to higher temperatures. The general conclusion is that shear stress increases with increase in temperature and torque while viscosity generally decreases along the trends.
- Full Text:
- Authors: Eloka-Eboka, Andrew C. , Inambao, Freddie , Laseinde, Opeyeolu T.
- Date: 2018
- Subjects: Thermal properties , Rheological , Viscosity
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/${Handle} , uj:30683 , Citation: Eloka-Eboka, A.C., Inambao, F. & Laseinde, O.T. 2018. Determination of Thermal and Rheological properties of Biodiesel fuels from Algae and Blends.
- Description: Abstract: Comparative investigation and assessment of thermal and rheological properties of biodiesel fuels from micro algae was carried out with the aim of assessing micro-algal technology as a viable biodiesel production option. Chlorella vulgaris and Synedesmus spp were collected, cultured and cultivated in the open pond and in photobioreactor differently and inoculated with Agar broth media for twenty-three and sixteen days respectively for biomass production/accumulation. Thermal parameters and rheological properties were studied. Viscosity is one of the most critical feature of a fuel or biofuel. It plays a dominant role in fuel spray, fuel-air mixture formation and the combustion process. Fuels are sprayed into compressed air and atomized into small droplets near the nozzle exit in any diesel engine. In the combustion chamber, fuel forms cone-shaped spray at the nozzle exits which impacts the viscosity and also affects the atomization quality, penetration and size of fuel droplets. Density is an important fuel property that influences the amount of fuel injected into the engine cylinder. Changes in fuel density influences engine output power due to different mass of the fuel being injected, and this directly affects engine performance characteristics and emissions. TGA conducted reveals stability of algal oil and biodiesel after thermal treatment. With studies of viscosity and shear stress at varying speeds and temperature being evaluated, the interaction of viscosity at different torque presented in this study decreases from 20rpm to 60rpm but increases in shear stress at temperatures of 40o and 60o. Across temperature was a general initial decrease and later increase from lower temperatures to higher temperatures. The general conclusion is that shear stress increases with increase in temperature and torque while viscosity generally decreases along the trends.
- Full Text: