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A predictive approach for vibration analysis in underground mining operation

- Mulaba-Bafubiandi, Antoine Floribert, Lagouge, Tartibu

A review on correction methods to solve limited representativeness in mineralogical analysis of measured liberation data

- Madiba, Mapilane S., Mulenga, François K., Hildebrandt, Diane

Adult first-time user of handheld computer system : challenges

- Toko, Guy, Mnkandla, Ernest

  • Authors: Toko, Guy , Mnkandla, Ernest
  • Date: 2020
  • Subjects: Handheld computer system , Adult , First-time user
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/428926 , uj:36908 , Toko, G., Mnkandla, E.: Adult first-time user of handheld computer system : challenges.
  • Description: Abstract: Handheld computing systems or devices can be defined as exceptionally portable, independent information management and communication devices. Furthermore, handheld computing systems or devices can be seen as a small or pocket-sized computing device with a touch screen keyboard and input and output interface. According to the definition of handheld computing systems, numerous devices fit the description such as smartphones, personal digital assistants (PDAs) and pagers. However, adult first- time users of computer systems face different issues in adopting the device and the literature reviewed shows that most of them have difficulties with the design, such as the touch screen. The negative views of technology devices by adult first-time users can be attributed to the difficulty in adapting to new technology. Weakness, incapacity, distrust of technology, absence of perceived value and trouble in understanding how to utilise the device are largely the main problems observed by adult first-time users of handheld computer systems. However, they could accept the use of the devices provided their needs are taken into consideration by the developers. The limitation of the research was that only adults in the age range of 55 to 91 in Gauteng in South Africa were chosen for this research.
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An analysis of corporate governance in the big four auditing firms in South Africa

- Smith, Rozanne Janet, Marx, Ben

  • Authors: Smith, Rozanne Janet , Marx, Ben
  • Date: 2020
  • Subjects: Corporate Governance , Audit Firms , Corporate Failures
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/461614 , uj:41122 , Citation: Smith, R.J. & Marx, B. 2020. An analysis of corporate governance in the big four auditing firms in South Africa.
  • Description: Abstract: The spate of corporate failures around the world, such as Enron, WorldCom, AIG and more recently Patisserie Valerie and Steinhoff has attracted considerable attention from corporate regulators and professional bodies. One of the many victims of these failures has been the reputation of audit firms, the audit process and the accounting profession in general. Audit failures are the product of the values governing auditing firms. Good audit firm governance is a way in which the audit firms can maintain the public trust in their brands by being seen as exemplars of best practice governance. In South Africa during 2018, the IRBA issued a call to audit firms to introduce the public reporting of relevant internal information in the form of a transparency report. This provides the public with limited information on the governance practice at the auditing firm. Board composition is arguably one of the most critical components of a corporation’s governance, and King IV also recommends disclosure with regards to the board composition. A content analysis was performed to analyse the disclosure on the oversight board and its composition of the big four audit firms in South Africa. From the findings it is evident that not all audit firms have an oversight board, and it can be argued that the corporate structures of the audit firms are flawed.
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Beegining : the implementation of appropriate

- Brown, Ivan Leroy, Campbell, Angus Donald

  • Authors: Brown, Ivan Leroy , Campbell, Angus Donald
  • Date: 2020
  • Subjects: Appropriate Beekeeping Technology , Innovation , Implementation
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/461549 , uj:41114 , Citation: Brown, I.L. & Campbell, A.D. 2020. Beegining : the implementation of appropriate.
  • Description: Abstract: In January 2018 a small South African business called Beegin opened its doors to the international beekeeping industry. Three years of design research, field-testing and development at the University of Johannesburg’s Department of Industrial Design resulted in a lightweight concrete beehive and a set of moulds for its distributed production. The appropriate beekeeping technology system (ABTS) produced good results in trials, however, the hardest part of any technological intervention, especially in a developing context, lies in its implementation at scale. Careful theoretical and methodological choices guided the design process through a focus on design for impact (Prestero, 2012), and learnings from the successes and failures of other appropriate technology (AT) projects (Hazeltine & Bull, 2003). This recipe became the foundation from which the delivery strategy for Beegin was planned. Two years later, Beegin has successfully delivered products to over 200 clients in 11 countries. The technology is beginning to have its intended impact, but the implementation process has been far from straightforward. Almost all of the early expectations were not achieved and plans had to be constantly revisited as Beegin struggled through the phases of business start-up despite, and in some ways due to, its innovative product offering. This paper will briefly document the development of the Beegin beekeeping technology system, the contextual problems it tried to address, and the theoretical framework and methods that led to its creation. The main focus of the paper will be an exploration of the transition phase of the Beegin beehive as an AT intervention that took the route from a University-based research project to commercial enterprise. This is relevant for AT discourse firstly because not much has been written on the subject, and secondly because there are useful lessons to be learnt from the practical experience of commercial implementation versus theoretical AT delivery.
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Commensurate Evaluation of Support Vector Machine and Recurrent Neural Network MPPT Algorithm for a PV system under different weather conditions

- Nkambule, Mpho Sam, Hasan, Ali N., Ahmed, Ali

Computer usability : interactive challenges faced by less experienced computer users in South Africa

- Toko, Guy, Mnkandla, Ernest

  • Authors: Toko, Guy , Mnkandla, Ernest
  • Date: 2020
  • Subjects: Usability , Computer Usability , Less Experienced Users
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/431925 , uj:37289
  • Description: Abstract: , The growing use of applications and access to the internet has increased the number of average computer users in South Africa, as people are using applications like WhatsApp, Facebook, Twitter, Instagram, and more. The goal of the study is to identify the challenges that most South African people face when they are interacting with computer applications, web applications, and mobile applications. The reason for conducting the study is that lately in South Africa we have seen an increase in South Africans who have access to computer systems, such as the use of smartphones, tablets or iPads, game consoles, and laptops. Most of the people who are using these devices or have access to them still face challenges as to how to use these devices or to use some of the applications that come with these devices. The paper will begin by introducing the topic. The paper will be followed by a literature review section, which will include four topics relating to the topic that helped the researcher to build a foundation for the research topic and to get ideas on how to do the research. The paper will then be followed by the research methodology, and the findings of, and discussions flowing from the study will then follow.
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Costing of health and safety elements in 2 construction projects in Gauteng, South Africa

- Akawi, Jirel, Musonda, Innocent

Dales and Blooms theory employed for NFT as pedagogy in accounting for non-financial students: conceptual research

- Nisi, Thusi

  • Authors: Nisi, Thusi
  • Date: 2020
  • Subjects: Collective creativity , Collaborative Learning , Innovative teaching and learning
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/461478 , uj:41105 , Citation: Thusi, N. 2020. Dales and Blooms theory employed for NFT as pedagogy in accounting for non-financial students: conceptual research.
  • Description: Abstract: Advanced pedagogy is the way to enhance teaching and learning performance for non- financial students. There are different methods in use across the globe for innovative teaching of higher learning students. The use of multimedia and technology empowers educational processes by increasing interaction between teachers and students. Hybrid teaching and blended learning follow an integrated approach to teaching that blends with students' interests and teacher's personality that needs curriculum-appropriate methods. This includes e-learning in addition to the face-to-face teaching that is customarily used in teaching . While teachers are still an authority figure in a student-centered teaching model, they both play an equally active role in the learning process. Teachers should thus apply themselves to utilizing innovative methods so that the students’ learning process is as free-flowing and that the methodology used creates an atmosphere adaptable to conducive learning environment. The application of innovative teaching and learning methods is critical if we are to motivate and enculturate a spirit of learning and cooperation by encouraging others and doing your share on the part of students. The role of education is to ensure that while academic personal are involve in active teaching, an effort is made to ensure alignment between what is taught and what is comprehensible in relation to students. Linguistically diverse, cultural backgrounds and the familiarity with the expected standards have profound effects on teaching methods. Students must frequently engage in collaborative learning activities such as selecting, organizing, locating, synthesizing and using relevant information sources to construct meaning about some particular knowledge. Such activities have been assumed to lead to higher levels of knowledge acquisition and learning. The goal of this study is an ongoing and progressive examine of how Edger Dale's Cone of Experience and Bloom's taxonomy is employed to positively influence student learning. In this conceptual research, the methodology used was hinged on analytic processes for material already published in this area. Key variables under investigation forecast on integration of Dales and Blooms theories for theoretical perspectives with the researchers pedagogy known as the NFT. The researcher implemented the NFT pedagogy in an academic setting to non-financial student in a period of 12 months and observed positive results. The researcher anticipates that the findings of this study will contribute to the enhancement of both teaching-learning and assessment process, which hopefully will uplift the learner to learn at a deeper level in a manner that incorporates small-group learning, achieve higher grades, retain information longer, acquire greater communication and teamwork skills, and gain a better understanding of the module.
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Debt literacy of First-Year Students at a Johannesburg University

- Boyce, Lulama, Bolton, Jordy

Early mathematics vocabulary and number concept development

- Bezuidenhout, Hanrie, Henning, Elizabeth, Fitzpatrick, Caroline, Ragpot, Lara

  • Authors: Bezuidenhout, Hanrie , Henning, Elizabeth , Fitzpatrick, Caroline , Ragpot, Lara
  • Date: 2020
  • Subjects: Maths vocabulary , Classroom engagement , Logical reasoning
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/461711 , uj:41134 , Citation: Bezuidenhout, H. et al. 2020. Early mathematics vocabulary and number concept development.
  • Description: Abstract: Many South African, grade R children fail to develop early number concepts that are a prerequisite for mathematics learning in the first grade. The same children may also enter formal education without adequate cognitive skills that are known to support mathematics learning. This paper theorizes that mathematics vocabulary, logical reasoning and classroom engagement (as output of the cognitive skills known as ‘executive functions’) are important skills for early number concept development. Although multilingual classrooms can be utilized for rich learning opportunities, they may also add to children’s ‘linguistic maze’. A theory of translanguaging describes how children can access various linguistic features or different autonomous languages, to maximize communication. The paper extends the theory of translanguaging to the domain of early number concept development and presents a hypothesis, suggesting that, together, an elaborated mathematics vocabulary, logical reasoning, and skills of executive functions significantly contribute to early number concept development. We make suggestions for improving underperforming young South African children’s mathematics understanding, specifically regarding expansion of their linguistic code, enhancing classroom engagement, and developing logical reasoning skills.
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Effect of co-digestion of food waste and cow dung on biogas yield

- Makhura, Emmanuel Pax, Muzenda, Edison, Lekgoba, Tumeletso

  • Authors: Makhura, Emmanuel Pax , Muzenda, Edison , Lekgoba, Tumeletso
  • Date: 2020
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/463760 , uj:41400 , Citation: Makhura, E.P., Muzenda, E., Lekgoba, T. 2020. Effect of co-digestion of food waste and cow dung on biogas yield. , DOI: http://doi.or g/10.1051/e3sconf/202018101005
  • Description: Abstract: This paper aims at finding the effect of co-digestion of cow dung and food waste on total biogas yield. Biogas production was improved through co-digestion of cow dung and food waste (FW) containing a small fraction of inoculum under mesophilic temperature (37ºC) over a retention time of 24 days. Codigestion ratios of 1:1, 2:1 and 3:1 for cowdung/foodwaste were used for the study on anaerobic digestion on the co digested matter. Tests were carried out starting with the preparation of substrates, substrate characterization to determine the moisture content (MC), total solids (TS), volatile solids (VS) and ultimately batch anaerobic digestion experiments under thermophilic conditions (370C). The moisture content, volatile solids and total solids for food waste were 78, 22 and 90.7% respectively while the characteristics for cow dung were 67.2, 32.8 and 96.0 % respectively. From the study, a mixing ratio of cow dung: food waste of 1:2 was found to be the optimum substrate mixture for biogas production at 25595.7 Nml. The accumulated gas volumes of 18756.6, 14042.5, 13940.8 and 13839.1 Nml were recorded for cow dung: food waste ratios of 2:1, 1:1, 1:3 and 3:1 respectively. For a co-digestion containing more of the food waste than cow dung, a higher volume of biogas is produce.
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Emissions Comparison of loose biomass briquettes with cow dung and cactus binders

- Shuma, Reuben, Madyira, Daniel M.

Enabling condition based maintenance in a precious metal processing plant

- Ngoma, William J., Mativenga, Paul T., Pretorius, J.

Enhancing the e-visibility status of environmental science researchers at the University of South Africa

- Adriaanse, Leslie S., Rensleigh, Chris

  • Authors: Adriaanse, Leslie S. , Rensleigh, Chris
  • Date: 2020
  • Subjects: E-visibility , Research online presence , Researcher online discoverability
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/463744 , uj:41398 , Citation: Adriaanse, L.S., Rensleigh, C. 2020. Enhancing the e-visibility status of environmental science researchers at the University of South Africa.
  • Description: Abstract: Knowledge sharing in academia has become increasingly important for researchers with their research online profiles becoming the vehicle of choice to advancing their research e-visibility. The proliferation of social networking tools with a research focus have become ideal online research communities for promoting the online presence and discoverability of a researcher and enhancing the accessibility of the researcher’s research output. This paper reports on the e-visibility themes 1) online presence, 2) researcher discoverability, and 3) accessibility of research output, of the environmental science researchers (SES) at the University of South Africa as part of a longitudinal e-visibility study during the period 2014 and 2016. The investigation into research e-visibility focused on the factors contributing to the increase in research e-visibility and the promotion of knowledge sharing. The e-visibility indicators represented via the bibliometric and altmetric data were sourced and collected from the appropriate tools i.e. bibliometrics from Web of Science, Scopus and Google Scholar; and the altmetric data collected from academic social networking tools i.e. ResearchGate, Academia.edu and Mendeley. The results indicate that the exposure to an e-visibility awareness strategy show an overall increase in the e-visibility indicators for the SES researchers with an increase in the net research online presence of 10.3%; the net researcher discoverability indicators increasing with 28%; and the research output accessibility indicators increasing with 18.3%. Altmetrics and bibliometrics become valuable indicators for measuring the research e-visibility of researchers in academia. This study found that e-visibility awareness, as part of an e-visibility strategy, enhanced research e-visibility, thereby increasing the research online visibility, the researcher’s discoverability, and the accessibility of the research output of the SES researchers at University of South Africa. Knowledge sharing in academia is increasingly advanced as researchers embrace these online research communities and the realization of the value of their research e-visibility.
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Evaluation of indigenous technology for cast aluminium cookware production in Nigeria : a case study of user health risks from cookware make in Saki

- Adelabu, Oluwafemi Samuel, Campbell, Angus Donald

  • Authors: Adelabu, Oluwafemi Samuel , Campbell, Angus Donald
  • Date: 2020
  • Subjects: Low-cost indigenous technology , Cast aluminium cookware , User health risks
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/461678 , uj:41130 , Citation: Adelabu, O.S. & Campbell, A.D. 2020. Evaluation of indigenous technology for cast aluminium cookware production in Nigeria : a case study of user health risks from cookware make in Saki.
  • Description: Abstract: Today, the artisanal production of aluminium cookware, which relies solely on secondary (recycled) aluminium, has become a crucial activity of socio-economic significance in Nigeria and other parts of Africa. Despite this development, the impacts of the products lifecycle have gained little or no attention in scientific study. In this study, we considered assessing the potential human health risks of the artisanal cast aluminium cookware produced in Saki, Southwestern Nigeria. Water quality tests and microstructural characterisation were done with two cookware samples produced under different smelting conditions. From the preliminary tests, the water analysis result indicates that with an instant use, the migrations of aluminium (Al), iron (Fe), manganese (Mn) and other metallic ions into the water sample boiled with the cookware were not beyond the acceptable limit set by the World Health Organisation (WHO) for water quality standards. From the SEM-EDX results, no toxic or heavy metallic element like lead was found. Additionally, typical elements which are expected to be found in aluminium alloys were present in the composition of the cookware. This indicates that despite the indigenous method of producing the cookware, contaminants that could be detrimental to the health of users were well-controlled. While further experimental testing is proposed, the study observed the need to gradually refine the overall production processes for indigenous aluminium cookware while leveraging scientific knowledge for advancing local craft techniques in a high technological era.
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Evaluation of the Stirling heat engine performance prediction using ANN-PSO and ANFIS models

- Machesa, M. G. K., Tartibu, L. K., Tekweme, F. K ., Okwu, M. O.

Improving the diagnosis of incipient faults in power transformers using dissolved gas analysis and multi layer perceptron

- Nkosi, S., Bokoro, P.

Influence of single and double-atom metal doping on the electrocatalytic hydrogen evolution activity of 2D-MoS2 surface

- Mohlala, Lesego M., Oviroh, Peter O., Jen, Tien-Chien, Olubambi, Peter A.

Investigating the effect of yeast on the anaerobic digestion of cow dung

- Rasmeni, Zelda Z., Magwaza, Bongeka N., Madyira, Daniel M., Matheri, Anthony N.

  • Authors: Rasmeni, Zelda Z. , Magwaza, Bongeka N. , Madyira, Daniel M. , Matheri, Anthony N.
  • Date: 2020
  • Subjects: Anaerobic Digestion , Biogas Yield , Cow Dung
  • Language: English
  • Type: Conference Proceedings
  • Identifier: http://hdl.handle.net/10210/459254 , uj:40824 , Citation: Rasmeni, Z.Z. et al. 2020. Investigating the effect of yeast on the anaerobic digestion of cow dung.
  • Description: Abstract: The aim of this paper was to investigate the effect of yeast on the biomethane yield of an anaerobic digester with cow dung feedstock. The biochemical methane potential (BMP) test was conducted on three different substrates for the production of biomethane. The BMP test was carried out using batch digesters at a temperature of 37 ℃. The substrates were divided into three parts: cow dung alone, yeast alone and the last involved the digestion of the mixture of cow dung and yeast. The maximum volume of the biomethane produced was observed from the samples containing yeast alone with a volume of 675.97 Nml Biogas/g VS. The lowest volume of biogas occurred on the samples containing the mixture of cow dung and yeast with 15 g of yeast and had a volume of 266.0 Nml Biogas/g VS. The sample containing cow dung alone produced a volume of 364.29 Nml Biogas/g VS. The results obtained for the digestion of yeast alone indicated that the higher yield of biogas was obtained when little amount of yeast was added on the substrate and that the addition of yeast on the anaerobic digestion of cow dung improves the yield of biogas; with the optimum biogas yield occurring at the ratio of 1:2 (yeast: cow dung).
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