Showing items 1 - 20 of 1721

A comparative study on new product development projects : supplier-client partnerships in manufacturing industry MATEC Web of Conferences 312, 01002 (2020) https://doi.org/10.1051/matecconf/202031201002

- Hashe, Vuyo T.

  • Authors: Hashe, Vuyo T.
  • Date: 2020
  • Subjects: Buyer , Product development , Supplier
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/437142 , uj:37950 , Citation: Hashe, V.T. 2020. A comparative study on new product development projects: supplier-client partnerships in manufacturing industry .
  • Description: Abstract: This paper was to investigate, explore and gain an understanding of the factors that enable and support supplier-client collaboration in New Product Development Projects (NPDP) within the South African manufacturing industry. This study was based on two case studies where two NPDP within South African on two different firms were studied. The predominant focus of this report studied the supplier involvement and relationship factors, supplier selection factors, and cultural environment and collaboration factors. The main data used was collected via interviews and internal company documents. The collected data was then analyzed and the outcome provided insight into the factors and relationship between these factors. This study noted that firms can enter into collaboration to accelerate the product development process. This includes enhancing the ability of the firm to respond to key customer needs. Firms can make use of the collaboration advantage where they see a market opportunity where their teams have less to no expertise and skills required to capture the opportunity. In addition, research and development costs stand to be reduced significantly, where the collaboration partner is chosen effectively. This study concludes by seeing it as beneficial to firms to collaborate with their suppliers under proper management.
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A land suitability analysis of the Vhembe district, South Africa, the case of maize and sorghum

- Mufungizi, A. A., Musakwa, W., Gumbo, T.

Adapting to artificial intelligence through workforce re-skilling within the banking sector in South Africa

- Mamela, Tebogo Lucky, Sukdeo, Nita, Mukwakungu, Sambil Charles

  • Authors: Mamela, Tebogo Lucky , Sukdeo, Nita , Mukwakungu, Sambil Charles
  • Date: 2020
  • Subjects: Banking institution , Workforce , Artificial intelligence
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/450788 , uj:39640 , Citation: Mamela, T.L., Sukdeo, N. & Mukwakungu, S.C. 2020. Adapting to artificial intelligence through workforce re-skilling within the banking sector in South Africa.
  • Description: Abstract: This research paper intends to inspire the banking sector to re-skill the workforces and present the opportunities in re-skilling the banking institutions workforces in South Africa to adapt to the roll out of Artificial Intelligence technologies. The research addresses the factors that will contribute to the workers re-skilling and the skills that are needed in order for the banking workforce to survive in the competitive labor market of the fourth industrial revolution which may result in the obsolete of many job skills. This research also considers the relevant skills and competencies that will be on-demand by the future banking workforces to enable them to successfully adapt to the aspects of the 4IR technological innovations inclusive of the AI toolset such as machine learning, blockchain, nanotechnology, robotics, Internet of Things, biotechnology, cloud computing and so forth, which may ultimately impact the workforce’s performance and productivity in the banking institutions. The research uses descriptive statistics and inferential statistics. The research has achieved results based on the assessment of the relationship between workforces’ capabilities and the components that make up Artificial Intelligence toolset. The findings show that the adaptation of AI strongly depends on most of the stated skills, therefore banks are required to re-skill their workforces in order to adapt to AI advanced technologies so as to make them relevant in the future. Re-skilling the banking workforce to cooperate and collaborate effectively with Artificial Intelligence will enable not only efficiency, but innovation and growth.
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An analysis of the quality of public transport in Johannesburg, South Africa using an adapted SERVQUAL model

- Luke, Rose, Heyns, Gert J.

  • Authors: Luke, Rose , Heyns, Gert J.
  • Date: 2020
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/451735 , uj:39817 , Citation: Luke, R. & Heyns, G.J. 2020. An analysis of the quality of public transport in Johannesburg, South Africa using an adapted SERVQUAL model.
  • Description: Abstract: Public transport services are generally regarded as being of low quality in many developing cities, with Johannesburg being a typical example of a city with few government funded public transportation services and relatively low levels of mobility and accessibility. The South African government’s stated aims for public transport are to achieve large scale modal shift to public transport and more environmentally friendly modes of transport. Using the SERVQUAL model, this study aims to measure the service quality of the majority of public transport modes by comparing commuter’s perceptions of the current service levels with their expectations to determine service gaps where interventions are required. The results reflect that safety concerns, particularly regarding protection from crime, and maintenance, particularly in as it affects the reliability of the service are concerns across most modes of transport. Although commuters regard the services as relatively affordable, this is insufficient to attract customers and reduce car ownership aspirations. Concerns related to addressing the mobility and accessibility needs of commuters in the off-peak, keeping commuters informed and training staff to be willing to assist passengers are likely to impact the willingness to remain on public transport and even attract new users. This research is of value to transport service providers in understanding the gaps in and hlights the dissatisfaction in the current levels of public transport service, as well as providing some indication of areas in which future interventions can be directed.
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An investigation into the effects of gamification on students’ situational interest in a learning environment

- Ndlovu, Taboka Ngqabutho, Mhlongo, Siyabonga

  • Authors: Ndlovu, Taboka Ngqabutho , Mhlongo, Siyabonga
  • Date: 2020
  • Subjects: Kahoot! , Gamification , Situational interest
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/433056 , uj:37430 , Citation: Ndlovu, T.N. & Mhlongo, S. 2020. An investigation into the effects of gamification on students’ situational interest in a learning environment.
  • Description: Abstract: As today’s students are born into digital technologies, educators must adapt to the growing changes in the edutechnological landscape. For the educators to thrive in their pedagogical endeavours, they need to be able to adopt these technological advancements into their teaching styles and approaches so to better meet the needs of their students. In support of this, gamification is becoming a popular topic in education today. Conceptually, gamification refers to the use of game mechanics in nongame contexts. Many researchers have found that the adoption and use of gamification tools such as Kahoot! has a positive impact on certain psychological aspects of the students’ learning process. These include increased levels of interest in and engagement with content, both of which are key in the overall motivation of students as a psychological construct. The purpose of this paper is to report on the findings from a study that sought to uncover the effects of employing a gamification platform in the teaching and learning processes at a university in Johannesburg, South Africa. Specifically, the study employed a quantitative approach to investigate the effect of gamification on the students’ situational interest. The analysis of data revealed that the concept of gamification has the potential of triggering and maintaining students’ situational interest, which serves as a foundation towards an engaged and motivated student.
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An investigative study of the mechanical properties of a composite novel plant fibre

- Hashe, Vuyo, Kaelo, Olehile

  • Authors: Hashe, Vuyo , Kaelo, Olehile
  • Date: 2020
  • Subjects: Natural fibre , Plants , Properties
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/450758 , uj:39636 , Citation: Hashe, V. & Kaelo, O. 2020. An investigative study of the mechanical properties of a composite novel plant fibre.
  • Description: Abstract: This paper introduces a novel natural fibre from an indigenous source tree with the intention of reducing the dependency on imported high-quality natural fibres from outside Africa. Commercialized plant fibres from plants like Sisal generate income for their host countries in Central American and European regions. This plant is used in polymer matrix composites as a load-bearing member. This paper identified three plants – Sparmania Africana, Ficus lutea and Ficus sur, of which only the Ficus trees were investigated. The properties investigated were the uniaxial tensile strength and Young’s Modulus as these properties enabled the researchers to characterise the material strength. The Ficus lutea out-performed the Ficus sur in overall strength, but the relationship and shape of the curves is that of brittle material. The true strength and the engineering strength are almost the same for both materials – about 97% identical. On average, maximum strength is about 22.6 and 17.5 MPa at breaking, with Ficus lutea greater than Ficus sur. Research is statistically valid with a P-value of less than 0.05, this paper achieved a P-value of 0.001162. In addition, the two Ficus plants did not perform well when compared to Sisal plant.
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Analysis of aircraft maintenance processes and cost

- Mofokeng, Tseko, Mativenga, Paul T., Marnewick, Annlizé

Analysis of the IEC 61850 protocol when used for communication during maintenance operations in an electrical substation grid

- Njova, Dion, Ogudo, Kingsley, Umenne, Patrice

  • Authors: Njova, Dion , Ogudo, Kingsley , Umenne, Patrice
  • Date: 2020
  • Subjects: IEC 61850 , Intelligent Electronic Devices (IED’s) , GOOSE messages
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/445433 , uj:38974 , Citation: Njova, D., Ogudo, K. & Umenne, P. 2020. Analysis of the IEC 61850 protocol when used for communication during maintenance operations in an electrical substation grid.
  • Description: Abstract: During Substation maintenance a bay is taken out of service, tested and during testing traffic is generated on the Substation Communication Network (SCN) in a power utility. A model of a Substation Communication Network that is using the International Electrotechnical Commission (IEC) 61850 protocol has been modeled in Optimized Network Engineering Tool (OPNET). IEC 61850 is a protocol that can be used in a power utility to provide interoperability between different vendors of Intelligent Electronic Devices (IED’s). Most of the IED’s sold by manufacturers for power utility networks support IEC 61850 protocol. The model has three scenarios and they are normal operation of a Substation, maintenance in a Substation and Buszone operation at a Substation. In all the scenarios packet end to end delay of GOOSE, GSSE, SV and MMS messages are monitored. The throughput from the IED under maintenance and the throughput at the Substation RTU end is monitored in the Model. The design of the Substation Communication Network using IEC 61850 will assist when trying to predict the behavior of the network with regards to this specific protocol during maintenance and when there are faults in the communication network or IED’s.
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Application of reliability engineering in a chemical plant to improve productivity

- Hashe, Vuyo Terrence, Mamatlepa, Makgomo Thelma

  • Authors: Hashe, Vuyo Terrence , Mamatlepa, Makgomo Thelma
  • Date: 2020
  • Subjects: Owntime , Maintainability , Reliability
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/437157 , uj:37951 , Citation: Hashe, V.T. & Mamatlepa, M.T. 2020. Application of reliability engineering in a chemical plant to improve productivity.
  • Description: Abstract: This paper is based on reliability case study conducted in a chemical company (Company X) based in Germiston South Africa. The work conducted focused on the causes of production loss due to poor equipment reliability that lead to downtimes. In the chemical, the production team generates works orders through an autonomous maintenance exercise which is aimed at identifying potential equipment defaults before they cause a breakdown. The works orders are categorized under corrective maintenance schedule. There are also time based preventative maintenance works orders that are created on System Application Program (SAP) for critical equipment and their components. More often, the response time from the maintenance team is slower and leads to subsequent breakdowns and production stoppages. The financial documents of the chemical plant showed that on average the plant spends $31 000 per month on maintenance cost. Projections indicate that this could easily amount to more than $376 000 per annum provided that there is no mid-term to long-term intervention to address equipment failures. The main objective of this study is to investigate the causes of reoccurring system failures using the reliability concepts and provide a solution specific to Company X which could be expanded to other companies and industries. This study followed both a qualitative and descriptive case study research approach. Data collection was carried out by attending to equipment breakdowns, observations during the normal daily operations, during production times, studying the historical available maintenance and technical relevant data, staff interviews, company internal information regarding the financial spending for the year of study. Finding indicated that the plant maintenance programmes were inadequate and needed to be revitalised by the introduction and implementation of reliability centred maintenance (RCM) process. The RCM process was suggested to address the issue of identifying key priority equipment responsible for major downtimes and analysing the failure modes so to suggest corrective actions before failure occurs.
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Causes and impact of human error in maintenance of mechanical systems

- Nkosi, Mfundo, Gupta, Kapil, Mashinini, Madindwa

  • Authors: Nkosi, Mfundo , Gupta, Kapil , Mashinini, Madindwa
  • Date: 2020
  • Subjects: Failure , Human error , Human factor
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/411127 , uj:34536 , Citation: Nkosi, M., Gupta, K. & Mashinini, M. 2020. Causes and impact of human error in maintenance of mechanical systems.
  • Description: Abstract: The concept of minimizing human error in maintenance is progressively gaining attention in various industries. The incorporation of human factors when solving engineering problems, particularly in maintenance, can no longer be ignored where high standards of performance are expected. The journey of improving maintenance performance through the reduction of human error begins with the understanding of causes and impact of human error in maintenance. This paper evaluates previous scholarly writings on human errors, to specifically establish the causes and impact of human error in maintenance. This study relies predominantly on the existing literature on human error in maintenance derived from published and unpublished research. The primary findings emerging from the research exhibit a number of key factors that cause a human error in maintenance such as poor management and supervision, organizational culture, incompetence, poorly written procedures, poor communication, time pressure, plant and environmental conditions, poor work design and many more. The literature review also revealed that human errors have a negative impact on safety, reliability, productivity and efficiency of the equipment. It was further discovered that equipment failures leading to accidents, incidents, loss of life and economic losses are the major effects of human error. Human error in mechanical systems’ maintenance is a serious problem which needs adequate attention in order to develop corrective and preventive measures. This review paper serves as a basis for maintenance practitioners and interested parties to develop corrective and preventive measures for minimizing human error in the maintenance of mechanical systems.
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Comparative study of Hydrogen yield from magnesium waste products in Acetic acid and Iron chloride solution

- Hashe, Vuyo T., Jen, Tien-Chien

  • Authors: Hashe, Vuyo T. , Jen, Tien-Chien
  • Date: 2020
  • Subjects: Hydrogen , Waste magnesium , Hydrolysis reaction
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/434772 , uj:37650 , Citation: Hashe, V.T. & Jen, T.C. 2020. Comparative study of Hydrogen yield from magnesium waste products in Acetic acid and Iron chloride solution.
  • Description: Abstract: Low-grade magnesium (Mg) waste from post-consumer products and production waste cannot be recycled efficiently and economically. This work addresses this challenge by converting this waste into hydrogen. Hydrogen (H2) offers a wide range of benefits and the greatest of them all is its ability and flexibility to be used as a green energy carrier. In this work Mg waste is re-melted, loaded on one side of a stainless steel and allowed to solidify at room temperature to form a galvanic Mg stainless steel couple. Mg reacts slowly with water and releases hydrogen at room temperature and this is followed by the formation of magnesium hydroxide on its surface. Stainless steel net is considered as a metallic catalyst and two acids as accelerators reacting with the couples separately. A set of couples were used to generate hydrogen in 3.5% by weight acetic acid (CH3COOH). The experimental results show that a mean accumulated H2 volume of 3.17 – 3.21 litres was produced in 3600 seconds. Another set of couples produced H2 in 1.5 wt. % of iron chloride (FeCl3). The results confirmed FeCl3 as an excellent hydrolysis reaction accelerator with stainless steel as an effective catalyst. On average, the reaction yielded 2700mL of H2 over 3600 seconds which appear to be substantially higher than the litres achieve when CH3COOH was considered as an accelerator.
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Conceptualization of the optimal design of a hydroxyl booster dry cell for enhancing efficiency of internal combustion engines

- Chinguwa, Simon, Jen, Tien-Chien, Akinlabi, Esther T.

  • Authors: Chinguwa, Simon , Jen, Tien-Chien , Akinlabi, Esther T.
  • Date: 2020
  • Subjects: Dry cell , Hydroxyl , Internal combusion
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/437148 , uj:37948 , Citation: Chinguwa, S., Jen, T.C. & Akinlabi, E.T. 2020. Conceptualization of the optimal design of a hydroxyl booster dry cell for enhancing efficiency of internal combustion engines.
  • Description: Abstract: Current internal combustion engines (ICEs) are powered by fossil fuels which create the challenges of low combustion efficiency and the emission of greenhouse gases. This has negatively affected the environment, leading to global warming and climate change. Interim technologies can be implemented to reduce these effects whilst alternative technologies are being explored. This research aimed at selecting the most appropriate geometrical design of a hydroxyl booster dry cell, a device which operates on the principles of electrolysis to produce hydroxyl gas commonly referred to as Brown gas or HHO. When a voltage is applied to a body of water, it splits it into its base components, i.e. hydrogen and oxygen cold plasma, a mixture sometimes referred to as hydroxyl gas. The addition of hydroxyl gas into the combustion chamber of an ICE initiates a more complete combustion due to the explosive and diffusive nature of hydrogen accompanied by the cooling effect of water thus reducing potential for NOx formation. This leads to fuel savings, cost savings and reduced emissions. A rectangular hydroxyl booster dry cell was selected and designed, fabricated and tested for effectiveness. The HHO generator is later connected to the ICE system to check mainly on the positive contributions of this Brown’s gas as HHO is popularly known.
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Curriculum development in South Africa : the role of professional bodies

- Dowelani, Musimuni, Dowelani, Faith

Design and implementation of a low-cost home automation and monitoring IoT system using message que telemetry transport protocol : South Africa context

- Ogudo, Kingsley A., Ayodele, Periola

  • Authors: Ogudo, Kingsley A. , Ayodele, Periola
  • Date: 2020
  • Subjects: Home automation , Internet of Things , End-user
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/445447 , uj:38972 , Citation: Ogudo, K.A. & Ayodele, P. 2020. Design and implementation of a low-cost home automation and monitoring IoT system using message que telemetry transport protocol : South Africa context.
  • Description: Abstract: Home automation is a fast and growing industry in South Africa, because in recent years almost everything home and office electrical and electronics appliances are been connected to the internet and human mobile devices. There is an increase in demand of time from the working class and hence the busy time schedule. This necessitate the home automation and monitoring systems which enable homeowners to remotely monitor and control appliances in their houses and offices without being present in the device physical location. The designed system host the integrated intelligent unit functionalities that enable communication between the controller and remote end-user units of the system. It is important to ensure that home automation systems have a low cost to enable user adoption. Home automation systems should also incorporate latest technology, portability and also have internet connectivity capabilities. This paper proposes a design of low-cost home automation system that incorporates internet access and delivers internet of things (IoT) connectivity services in a smart home application. The designed system provides access to an internet connected home automation systems. The system is accessible via mobile devices and provides remote access to home appliances. In conclusion, during measurement and testing of the designed system, device full duplex connection for one round trip was less that 5seconds to relay a message packet between the transmitter subscriber device and the publisher receiver device. The performance of the designed device is satisfactory at first iteration prototype designed.
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Design of a smart home system using bluetooth protocol

- Sondo, Sandile, Ogudo, Kingsley, Umenne, Patrice

  • Authors: Sondo, Sandile , Ogudo, Kingsley , Umenne, Patrice
  • Date: 2020
  • Subjects: Micro-controller , Home automation , Sensor
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/445463 , uj:38970 , Citation: Sondo, S., Ogudo, K. & Umenne, P. 2020. Design of a smart home system using bluetooth protocol.
  • Description: Abstract: Home automation is an intelligent, functional as a unit system that facilitates home processes without unnecessarily complicating the user’s life. Devices can be connected, which in turn connect and talk through a centralized control unit, which are accessible via mobile phones. These devices include lights, appliances, security systems, alarms and many other sensors and devices. This paper presents the design and implementation of a Bluetooth based smart home automation system which uses a Peripheral interface controller (PIC) microcontroller (16F1937) as the main processer and the appliances are connected to the peripheral ports of the microcontroller via relays. The circuit in the project was designed in Diptrace software. The PCB layout design was completed. The fully functional smart home prototype was built and demonstrated to functional.
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Detection of sinkhole occurrence, experiences from South Africa

- Ferentinou, Maria, Witkowski, Wojciech, Hejmanowski, Ryszard, Grobler, Hennie, Malinowska, Agnieszka

  • Authors: Ferentinou, Maria , Witkowski, Wojciech , Hejmanowski, Ryszard , Grobler, Hennie , Malinowska, Agnieszka
  • Date: 2020
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/447179 , uj:39187 , Citation: Ferentinou, M. et al. 2020. Detection of sinkhole occurrence, experiences from South Africa. https://doi.org/10.5194/piahs-97-1-2020
  • Description: Abstract: Sinkholes are alarming and dangerous events, they have a worldwide occurrence, and are imposing a potential risk to urban communities and the widely developed built environment. Losses due to catastrophic sinkhole collapse, foundation, pavement and structural repairs, occur more often, due to the increased pressure to develop even on sinkhole prone land, and the aging of existing water supply infrastructure in the majority of cities. Remote sensing earth observation methods have proved to be valuable tools during the last two decades in long-term sinkhole hazard assessment. Satellite air borne and ground earth observation methods have primarily facilitated the wide detection of continuous displacement on the earth’s crust. National sinkholes catalogues are necessary for town planers decision makers, and government authorities. In many instances the ground collapse is the result of water ingress from old poorly maintained leaking pipelines, or extensive dewatering activities. In the current study a comprehensive review of the current literature is presented in order to show experiences from South Africa and present recent mapping using PSInSAR methodology in Centurion South Africa.
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Determination of economic liberation and mineralogical characteristics of Nigerian iron ore for effective processing

- Ola-Omole, O. O., Nheta, W.

  • Authors: Ola-Omole, O. O. , Nheta, W.
  • Date: 2020
  • Subjects: Hematite , Magnetite , Economic liberation
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/450636 , uj:39624 , Citation: Ola-Omole, O. O. & Nheta, W. 2020. Determination of economic liberation and mineralogical characteristics of Nigerian iron ore for effective processing.
  • Description: Abstract: Iron and steel play very important role in the economy of any nation because it is the yardstick for determining the rate of industrialisation of the countries. The present work studied the economic liberation and mineralogical characteristics of Nigerian low grade iron ore for effective processing. The ore studied was sourced from Itakpe an iron ore deposit in Nigeria. The sample was crushed sieved and characterized to understand the economic liberation and mineralogical characterization. Sieve analysis carried out based on the 2 method to choose 2300, 1700, 1180, 850, 600, 425, 300, 212, 150, 106, 75, and 63 μm sieves. Thereafter, Scanning Electron Microscopy (SEM) and Xray diffraction was carried out to study the mineralogical characteristics of the sample. The results obtained shows that the economic liberation of Itakpe is between -425 and +300 μm. The sample identity by SEM and XRD shows that the ore majorly contains hematite, magnetite and silica. It was therefore suggested that the ore can be concentrated by a combination of gravity separation method (jigging hydroclassifying or using the wifely shaking table) and magnetic separation to process the ore. Thereafter, more studies can investigation can be carried out to determine optimum parameters for flotation at lower particle sizes.
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Effect of thermosyphon limits on design of a taper thermosyphon drill for dry drilling operation

- Ncaba, Nkosana Ignetious, Wiykiynyuy, Nyuytifo Emmanuel, Jen, Tien-Chien, Ukoba, Kingsley

  • Authors: Ncaba, Nkosana Ignetious , Wiykiynyuy, Nyuytifo Emmanuel , Jen, Tien-Chien , Ukoba, Kingsley
  • Date: 2020
  • Subjects: Dry drilling , Thermosyphon , Heat pipe
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/428386 , uj:36841 , Citation: Ncaba, N.I. et al. 2020. Effect of thermosyphon limits on design of a taper thermosyphon drill for dry drilling operation.
  • Description: Abstract: This This paper focused on the effect of thermosyphon limits on the design of a taper thermosyphon drill for dry drilling operation. Although, other methods such as minimum quantity lubrication have been sought but the harmful effects of metal working fluids persist. This study however focuses on the design, fabrication and testing of a thermosyphon drill for eliminating the use of metal working fluids in drilling operations. The methodology included the design of a taper thermosyphon drill, analysis of the thermosyphon drill, manufacturing and testing of the thermosyphon drill. A virtual design and stress analysis of the reversed tapered thermosyphon was done using SolidWorks software. A high speed steel drill bit was manufactured to suit the design requirements of the thermosyphon. The thermosiphon was then fabricated within the machine shop floor using Electric Discharge Machining through method of spark erosion. A reverse tapered thermosyphon was designed to improve the optimal performance of the drill...
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Effect of thermosyphon limits on design of a taper thermosyphon drill for dry drilling operation

- Ncaba, Nkosana Ignetious, Wiykiynyuy, Nyuytifo Emmanuel, Jen, Tien-Chien, Ukoba, Kingsley

  • Authors: Ncaba, Nkosana Ignetious , Wiykiynyuy, Nyuytifo Emmanuel , Jen, Tien-Chien , Ukoba, Kingsley
  • Date: 2020
  • Subjects: Dry drilling , Thermosyphon , Heat Pipe
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/437136 , uj:37947 , Citation: Ncaba, N.I. et al. 2020. Effect of thermosyphon limits on design of a taper thermosyphon drill for dry drilling operation.
  • Description: Abstract: This paper focused on the effect of thermosyphon limits on the design of a taper thermosyphon drill for dry drilling operation. Although, other methods such as minimum quantity lubrication have been sought but the harmful effects of metal working fluids persist. This study however focuses on the design, fabrication and testing of a thermosyphon drill for eliminating the use of metal working fluids in drilling operations. The methodology included the design of a taper thermosyphon drill, analysis of the thermosyphon drill, manufacturing and testing of the thermosyphon drill. A virtual design and stress analysis of the reversed tapered thermosyphon was done using SolidWorks software. A high speed steel drill bit was manufactured to suit the design requirements of the thermosyphon. The thermosiphon was then fabricated within the machine shop floor using Electric Discharge Machining through method of spark erosion. A reverse tapered thermosyphon was designed to improve the optimal performance of the drill...
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Effectiveness of delivery methods in the transfer of soft skills

- Keevy, Monique

  • Authors: Keevy, Monique
  • Date: 2020
  • Subjects: Academic programme , Accountants , Pervasive skills
  • Language: English
  • Type: Conference proceedings
  • Identifier: http://hdl.handle.net/10210/438686 , uj:38138 , Citation: Keevy, Monique. (2020). Effectiveness of delivery methods in the transfer of soft skills. 10.4995/HEAd20.2020.10994.
  • Description: Abstract: Accounting education has in recent years increasingly emphasised the need for developing soft skills. To this end, various delivery methods have been advocated other than the conventional lecture format during the academic programme. This paper reports on a study of the perceptions of graduates on the effectiveness of delivery methods during the academic programme in transferring soft skills. A questionnaire with open and closed-ended questions was administered. Graduates reported that soft skills were most effectively developed when using case studies, followed by collaborative learning. Surprisingly, graduates also indicated lectures as an effective method in soft skills development, by ranking this method after collaborative learning. However, the method of computer-based activities, was reported as the least effective method in developing soft skills. This is a concern, given the prevalence and use of computers and technology in the accounting profession. Educators need to do more in inculcating soft skills, by using additional methods such as mentorship programmes and self-assessment.
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