Showing items 36801 - 36820 of 36840

Relationships among senior school students’ self-efficacy, metacognition and their achievement in chemistry

- Oyelekan, Oloyede Solomon, Jolayemi, Seun Sola, Upahi, Johnson Enero

Removal of Fe and Mn from polluted water sources in Lesotho 3 using modified clays

- Nthunya, Lebea N

  • Authors: Nthunya, Lebea N
  • Subjects: Adsorption , Clay , phenylalanine , Water purification , Manganese , Iron
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/18618 , uj:16023 , Citation: Nthunya, L.N. Removal of Fe and Mn from polluted water sources in Lesotho 3 using modified clays. Physical chemistry of water treatment processes: 1-27.
  • Description: Abstract: This paper reports the use of unfunctionalized and phenylalanine functionalized clays as an alternative cost effective, environmental friendly and efficient sorbent for the removal of Mn and Fe from polluted drinking water sources in Lesotho. Mn and Fe were found to be the most prevalent metal pollutants in rivers supplying three drinking water treatment plants situated in Maseru, Roma and Quthing. The Mn and Fe metals were adsorbed on two different clays (clay A – a black clay and clay B – a yellow clay) collected from Ha-Teko in Maseru (clay A) and Phoqoane in Mafeteng district (clay B) in Lesotho. As a common assessment for adsorption materials, comprehensive batch test studies were performed to assess the effect of pH, stirring time, initial concentration and 26 kinetic studies of the adsorption of these metals. The adsorption of the metals was greater at higher pH and equilibrium was reached at pH 8.0 after 30 min of stirring. The phenylalanine functionalized clays displayed improved adsorption efficiency of up 100 % (Fe adsorption using modified clay A in 30 min) while the unfunctionalized clays gave relatively low adsorption of up to 70 % (Fe and Mn adsorption using modified clay A). This was observed on real and simulated water samples. The findings of this work suggest that the clays, which are 31 present in abundance in Lesotho, can be effectively used for the removal of Fe and Mn from drinking water sources in Lesotho.
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Reporting from the Frontline

Retrofitting hotels: evidence from the Protea Hospitality Group of hotels within Gauteng, South Africa

- Ismail, Sameera, Dr. Rogerson, Jayne M.

SA Breweries collection Finding Aid

Search for heavy resonances decaying to a photon and a hadronically decaying ZWH boson in p p collisions at p s = 13 TeV with the ATLAS detector

Setting the sun down on affirmative action : a South African perspective

- Ramafoko, Moribishane Stephens

  • Authors: Ramafoko, Moribishane Stephens
  • Subjects: Commercial law , Affirmative action programs - South Africa
  • Language: English
  • Type: Masters (Thesis)
  • Identifier: http://hdl.handle.net/10210/90204 , uj:19946
  • Description: Abstract:The Constitution of the Republic of South Africa (1996) laid the foundation for the promotion of achievement of equality and further provides for the legislative and other measures to be taken to protect or advance persons, or categories of persons, disadvantaged by unfair discrimination. One such measure was the enactment of the Employment Equity Act, No 55 of 1998. This the legislative measure aimed at forms part of the transformation legislation aimed at promoting equity and eliminating discriminatory and unfair treatment in the workplace. This Act was promulgated about 17 years ago, and its impact on transformation of the workplace into a representative establishments has to be measured. The private sector in particular, has shown reluctance in developing and/or implementing equity plans to advance the clearly stated objectives of the Constitution and the Act. This is evident in the number of organisations that are broad to book for failure to comply with the provisions of the Act. The Department of Labour reported on 24 July 2015 that 77 of South Africa’s big and medium companies were the first of 1 400 to face unprecedented court action over their failure to comply with employment equity legislation. This reflects on the challenges South Africa is regarding affirmative action. Several writers have shown their antagonism towards affirmative action. There have been calls that affirmative action must be ended. Claims such as that it is “reversed discrimination” and that it should not apply to the born-frees, have been canvassed widely. One such writer Valentine Mhungu, even produced a study that suggest that affirmative action should be terminated as it is not achieving its intended purpose but bring absurd and unintended results. This study seeks to demystify affirmative action and serve as a counter to the findings of Valentine Mhungu and many other antagonists of affirmative action and proves that there is no need to end affirmative action or to subject it to a sun-set clause. It further acknowledges that affirmative action is not and cannot be a permanent feature of employment sector as it has to and will die its natural death. This study further proposes mechanisms to fast track the implementation of affirmative action in South Africa.... , LL.M.(Commercial Law)
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South Africa: From Mrs Ples to Mandela & Marikana

Structural equation modelling the leaching of oxidised copper-cobalt ore in HCl aqueous solution

- Kime, Méschac-Bill, Mulaba-Bafubiandi, Antoine

  • Authors: Kime, Méschac-Bill , Mulaba-Bafubiandi, Antoine
  • Subjects: Leaching optimisation , Oxidised copper-cobalt ore , Structural Equation Modelling (SEM) , Multiple regression , Path analysis , Factor analysis , SPSS statistics
  • Language: English
  • Identifier: http://hdl.handle.net/10210/18571 , uj:16015 , Citation: Kime, M-B., Maluba-Bafubiandi, A. Structural equation modelling the leaching of oxidised copper-cobalt ore in HCl aqueous solution.
  • Description: Abstract: Structural Equation Modelling (SEM) is now widely used to explore the joint performance of factors affecting a process and to quantify the effect of each factor in the presence of the others. In this research work, SEM analysis was conducted to develop Structural Equation Models that well predict the leaching behaviour of Cu, Co, Ni and Fe in HCl aqueous solution of an oxidised copper-cobalt ore. A comprehensive set of experimental batch leaching tests was executed to study the effect of operating variables (pH, time, temperature and stirring speed) on the relative leaching yields of Cu, Co, Ni and Fe during the leaching of an oxidised copper-cobalt ore sample in an HCl aqueous solution. The gangue acid consumption was also measured to aid in understanding the behaviour of the gangue. The experimental results obtained were statistically analysed and modelled using the SEM procedure. The Structural Equation Models obtained showed that Cu and Co leaching yields had a strong positive dependence on both the leaching time and leaching temperature, while Fe leaching yield had a moderate dependence on the leaching temperature, stirring speed and the covariate Z (Z = stirring_speed*pH). On the contrary, Ni leaching yield had a strong negative dependence on both the stirring speed and the covariate Z. The Structural Equation Models agreed fairly with the experimental results obtained upon leaching. This is a clear indication that the models can be used to predict the leaching yields given a set of leaching parameters.
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Supporting the use of research evidence in decision-making in crisis zones in low-and middle-income countries : acritical interpretive synthesis

- Khalid, Ahmad Firas, Lavis, John N., El-Jardali, Fadi, Vanstone, Meredith

  • Authors: Khalid, Ahmad Firas , Lavis, John N. , El-Jardali, Fadi , Vanstone, Meredith
  • Subjects: Critical interpretive synthesis , Health system research , Barriers
  • Language: English
  • Identifier: http://hdl.handle.net/10210/462450 , uj:41236 , Citation: Khalid, A.F. et al. 2020. Supporting the use of research evidence in decision-making in crisis zones in low-and middle-income countries: acritical interpretive synthesis. , DOI: 10.1186/s12961-020-0530-2
  • Description: Abstract: Background: Decision-makers in crisis zones are faced with the challenge of having to make health-related decisions under limited time and resource constraints and in light of the many factors that can influence their decisions, of which research evidence is just one. To address a key gap in the research literature about how best to support the use of research evidence in such situations, we conducted a critical interpretive synthesis approach to develop a conceptual framework that outlines the strategies that leverage the facilitators and address the barriers to evidence use in crisis zones. Methods: We systematically reviewed both empirical and non-empirical literature and used an interpretive analytic approach to synthesise the results and develop the conceptual framework. We used a ‘compass’ question to create a detailed search strategy and conducted electronic searches in CINAHL, EMBASE, MEDLINE, SSCI and Web of Science. A second reviewer was assigned to a representative sample of articles. We purposively sampled additional papers to fill in conceptual gaps. Results: We identified 21 eligible papers to be analysed and purposively sampled an additional 6 to fill conceptual gaps. The synthesis resulted in a conceptual framework that focuses on evidence use in crisis zones examined through the lens of four systems – political, health, international humanitarian aid and health research. Within each of the four systems, the framework identifies the most actionable strategies that leverage the facilitators and address the barriers to evidence use. Conclusions: This study presents a new conceptual framework that outlines strategies that leverage the facilitators and address the barriers to evidence use in crisis zones within different systems. This study expands on the literature pertaining to evidence-informed decision-making.
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Synthesis, structural characterization, and magnetic properties of mixed ternary spinel-type Mn-Ni-Co oxides

Teba History

TEBA NRC numerical filing system

TEBA WNLA numerical file

Testing of IR Contents that are uploaded

- Mabunda, Tyson

The development of the micro-enterprise sector

- Hirschowitz, Ros

The impact of Corporate Social Investment : a case study of the Intsika Skills Beneficiation Project (ISBP)

- Sidambe, Pamela S.

  • Authors: Sidambe, Pamela S.
  • Subjects: Investments - South Africa , Social responsibility of business - South Africa , Corporations - South Africa , Unemployment - Social aspects - South Africa
  • Language: English
  • Type: Masters (Thesis)
  • Identifier: http://hdl.handle.net/10210/244253 , uj:25258
  • Description: M.A. , Abstract: Corporate Social Investment (CSI) is a topical subject in South Africa as the country explores sustainable mechanisms for dealing with the triple socio-economic challenges of poverty, high unemployment, and growing social inequalities. The challenge of a skills shortage has been identified as a major inhibitor in the government’s attempts to ensure that previously disadvantaged individuals and communities play a meaningful role in the mainstream economy. Corporates have been identified as having a potentially important role towards the upliftment of their “host” communities. In this regard, a number of policies and related instruments have been introduced to create a framework for the private sector to give back to society. Corporate governance instruments such as the King III Report and the King Code of Governance Principles have made CSI imperative. The Code compels companies to report on the value and impact of their CSI efforts in communities. Furthermore, the Broad-Based Black Economic Empowerment (B-BBEE) codes have made it mandatory for corporates to give a minimum of 1 percent of their net profit after tax to communities in need. The study sought to evaluate the impact of the Intsika Skills Beneficiation Project (ISBP), funded by the Nedbank Foundation through their CSI in its infancy stage, in 2008. The ISBP has a particular focus on skills development among the youth of Ekurhuleni. Ekurhuleni, one of the most densely populated municipalities in Gauteng, is plagued by various social ills such as a lack of employment opportunities – especially for the youth – crime, and alcohol and drug abuse. The study contributes to the evaluation of the impact of CSI and the skills development body of knowledge. The nature of the study was augmented by a qualitative paradigm for the collection of data. In-depth interviews were used to gather data from the ISBP founder, the Nedbank CSI manager, as well as ISBP participants. The participants of the ISBP comprised those who have; completed the qualification and are economically active, completed but still searching for work, completed and are entrepreneurs, and lastly, those who dropped out of the programme. The study examined the jewellery manufacturing skills imparted to participants. Weaknesses in the ISBP programme were identified, which served to accentuate the low impact of the initiative...
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The implications of the fourth industrial revolution on diplomacy

- Williams, Robyn Ehryn

  • Authors: Williams, Robyn Ehryn
  • Subjects: Artificial intelligence , Industry 4.0 , Industrial revolution
  • Language: English
  • Type: Masters (Thesis)
  • Identifier: http://hdl.handle.net/10210/477811 , uj:43185
  • Description: Abstract: Diplomacy has succeeded historical events and industrial revolutions. However, the impacts of the fourth industrial revolution (4IR) threaten to be more wide-spanning and destructive than any other industrial revolution. The study explores the implications of 4IR on the theory and practice of diplomacy. The study is guided by three research questions: how does 4IR impact diplomacy; what technologies trigger a change in diplomacy; and do costs act as a barrier to states? Making use of qualitative methods, through the exploration of primary and secondary data, the study explores 4IR’s implications on diplomacy. The implications are categorized into five pillars which are considered integral aspects of diplomatic theory and practice. The pillars are communication, interdependence, domestic and international frameworks, new ‘new’ diplomacy and diplomatic functions. The study concludes that diplomacy may be impacted by 4IR in all five pillars of diplomacy. 4IR may not diminish the practice of diplomacy but rather complement it. A highly digitized diplomacy with cyber tools may result in a more efficient and effective type of diplomacy. Technologies such as artificial intelligence, big data and information and communication technologies are the key drivers of change in diplomacy... , M.A. (Politics and International Relations)
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The information communication technology, social media, international migration and migrants’ relations with Kin in Nigeria

- Olayinka, Akanle, Fayehun, O.A., Oyelakin, O.

  • Authors: Olayinka, Akanle , Fayehun, O.A. , Oyelakin, O.
  • Subjects: International migration , Remittances , Kinship networks
  • Language: English
  • Type: Article
  • Identifier: http://hdl.handle.net/10210/488219 , uj:44470 , ISSN : 00219096 , DOI : 10.1177/0021909620960148 , Citation : Akanle, O., Fayehun, O.A. and Oyelakin, S., 2021. The Information Communication Technology, Social Media, International Migration and Migrants’ Relations with Kin in Nigeria. Journal of Asian and African Studies, 56(6), pp.1212-1225.
  • Description: Abstract : Studies abound on international migration and remittances across the world and studies are particularly not lacking on the subject in Africa. There are however few studies on the moderating roles of information communication technology (ICT) and social media in the relationships among international migration, remittances and relationships in Sub-Saharan Africa. This article examines the dimension of ICT and social media in migration studies. This is an aspect that has often been ignored and overlooked even though ICT and social media have great contributions in the international migration process particularly as migrants and relatives in sending and receiving countries both have the primary experience. Research objectives include: reasons for emigration; information technology/social media used by migrants and their kin as they relate across spaces; and how ICT affects relationships of kin and international migrants. Secondary data were gathered through journals, books, documents and reliable Internet sources. Primary data were gathered in Ibadan, Nigeria in 2018 through 30 in-depth interviews analysed through content analysis. Findings reveal the nature of ICT used by international migrants and their kin and purpose of utilization and the effects of ICT on international migration, remittances and kinship networks. The article presents detailed data, narratives, interpretations and implications of relationships among international migration, ICT/social media and kinship networks. This article argues that ICT/social media is central to international migration decision-making, access of migrants and kin to social forces and factors motivating international migration, and it is very important to how migrants and kin maintain and/or weaken relationships and access to remittances and utilization.
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The Spirit of Marikana

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