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University of the Witwatersrand

University of the Witwatersrand

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31 Projects, page 1 of 7
  • Funder: UK Research and Innovation Project Code: EP/L016362/1
    Funder Contribution: 3,527,890 GBP

    The motivation for this proposal is that the global reliance on fossil fuels is set to increase with the rapid growth of Asian economies and major discoveries of shale gas in developed nations. The strategic vision of the IDC is to develop a world-leading Centre for Industrial Doctoral Training focussed on delivering research leaders and next-generation innovators with broad economic, societal and contextual awareness, having strong technical skills and capable of operating in multi-disciplinary teams covering a range of knowledge transfer, deployment and policy roles. They will be able to analyse the overall economic context of projects and be aware of their social and ethical implications. These skills will enable them to contribute to stimulating UK-based industry to develop next-generation technologies to reduce greenhouse gas emissions from fossil fuels and ultimately improve the UK's position globally through increased jobs and exports. The Centre will involve over 50 recognised academics in carbon capture & storage (CCS) and cleaner fossil energy to provide comprehensive supervisory capacity across the theme for 70 doctoral students. It will provide an innovative training programme co-created in collaboration with our industrial partners to meet their advanced skills needs. The industrial letters of support demonstrate a strong need for the proposed Centre in terms of research to be conducted and PhDs that will be produced, with 10 new companies willing to join the proposed Centre including EDF Energy, Siemens, BOC Linde and Caterpillar, together with software companies, such as ANSYS, involved with power plant and CCS simulation. We maintain strong support from our current partners that include Doosan Babcock, Alstom Power, Air Products, the Energy Technologies Institute (ETI), Tata Steel, SSE, RWE npower, Johnson Matthey, E.ON, CPL Industries, Clean Coal Ltd and Innospec, together with the Biomass & Fossil Fuels Research Alliance (BF2RA), a grouping of companies across the power sector. Further, we have engaged SMEs, including CMCL Innovation, 2Co Energy, PSE and C-Capture, that have recently received Department of Energy and Climate Change (DECC)/Technology Strategy Board (TSB)/ETI/EC support for CCS projects. The active involvement companies have in the research projects, make an IDC the most effective form of CDT to directly contribute to the UK maintaining a strong R&D base across the fossil energy power and allied sectors and to meet the aims of the DECC CCS Roadmap in enabling industry to define projects fitting their R&D priorities. The major technical challenges over the next 10-20 years identified by our industrial partners are: (i) implementing new, more flexible and efficient fossil fuel power plant to meet peak demand as recognised by electricity market reform incentives in the Energy Bill, with efficiency improvements involving materials challenges and maximising biomass use in coal-fired plant; (ii) deploying CCS at commercial scale for near-zero emission power plant and developing cost reduction technologies which involves improving first-generation solvent-based capture processes, developing next-generation capture processes, and understanding the impact of impurities on CO2 transport and storage; (iimaximising the potential of unconventional gas, including shale gas, 'tight' gas and syngas produced from underground coal gasification; and (iii) developing technologies for vastly reduced CO2 emissions in other industrial sectors: iron and steel making, cement, refineries, domestic fuels and small-scale diesel power generatort and These challenges match closely those defined in EPSRC's Priority Area of 'CCS and cleaner fossil energy'. Further, they cover biomass firing in conventional plant defined in the Bioenergy Priority Area, where specific issues concern erosion, corrosion, slagging, fouling and overall supply chain economics.

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  • Funder: UK Research and Innovation Project Code: ES/V016601/1
    Funder Contribution: 228,254 GBP

    Over 200 million children under the age of 5 years in low-resource settings are exposed to adverse environmental factors, such as inadequate nutrition, physical illness and a lack of stimulation. This can have consequences for their ability to achieve important developmental milestones and, as a result, for subsequent school performance. While this is recognised as an important issue, there is very little research that aims to identify the earliest signs of risk and how it shapes development. Identifying early signs of risk in infancy is crucial for developing interventions to help children achieve optimal outcomes. It is also important to better understanding how specific aspects of a child's environment, such as nutrition and caregiving practices, contribute to their development. With this work, we will be better able to understand how certain risk factors impact on development and also how to best promote enriching elements within the family and broader community that can offset the impact of risk. The aim of this research is to investigate the development of cognitive skills from infancy to preschool age among a group of children from a rural region of The Gambia, West Africa. The data for this project comes from the Brain Imaging for Global Health project (BRIGHT; globalfnirs.org), a study that has been following a group of children in The Gambia from the prenatal period to preschool age to measure their brain and cognitive development during early childhood. The specific aims of this study are to: (1) Examine cognitive development from infancy to preschool age among this group of children in the rural Gambian setting. Our goal is to study individual differences in development, which may help to identify children who show delayed development compared with the rest of the group. (2) Investigate whether the ability to regulate attention and respond to social input during infancy predicts cognitive development during preschool age. We will use assessments of behavioural and neural responses to measure these skills in infancy and explore how they relate to outcomes during preschool age. (3) To understand how both adverse and enriching elements of a child's environment contribute to their cognitive development. In particular we are interested in examining how exposure to adversity early in life impacts on development. The adverse factors that we will investigate are poverty, poorer physical growth and maternal mental health difficulties. We are also interested whether enriching factors, including maternal engagement and broader caregiver support, can promote healthy cognitive development and offset some of the impacts of risk. (4) In addition to our research aims, we will also engage members of the Gambian community (parents, healthcare professionals) to ask for their input in our work. Moreover, we will establish a network of researchers from African institutions and across the globe, who study early childhood development in Africa, to share our findings and form collaborations. Our work has the potential to have important impacts for research, as well as the development of interventions. Firstly, this study can help us better understand the general development of children in The Gambia. It can also help identify early signs and risk factors for developmental difficulties. Finally, our findings will help to identify and promote elements of the family and broader community that provide enrichment. With this work, we aim to make a lasting contribution to the research community and society in The Gambia and broader global health settings.

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  • Funder: UK Research and Innovation Project Code: AH/R005567/1
    Funder Contribution: 24,188 GBP

    Against the backdrop of the dramatic social and economic divides characterizing contemporary South Africa, my research on Zionist Christianity offers the South African public an in-depth example of religion's role in pioneering equitable societies. My AHRC Fellowship examines the democratic resources of a transatlantic Protestant faith healing movement called Zionism. I show that in both the United States and South Africa, the Zionist church has been favoured by working-class individuals marginalized by those in power and who, in their conversion to Zionism, found new possibilities for self-assertion. For example, its doctrine encouraged adherents to eschew the expertise of medical professionals in favour of the simple prayer of ordinary people. By the early twentieth century, Zionism had been transmitted to South Africa via American missionaries. Its teachings regarding the equality of all humanity - regardless of race, class or education - meant Zionism found great success amongst black South Africans seeking to claim status and dignity amidst the strictures of a racially segregated state. While the movement declined in the USA, Zionism is today South Africa's largest religious group, with over 12 million believers. I argue Zionism continues to powerfully shape visions of egalitarian society within contemporary South Africa. While conducting research in South Africa, I encountered the prize-winning photographer, Sabelo Mlangeni, himself a life-long Zionist believer. Over the past year, Mlangeni and I have developed a proposal for a photographic exhibition at the renowned Wits Art Museum (WAM) in Johannesburg, displaying Mlangeni's 60 black and white photographs on contemporary Zionists. The exhibition will be entitled Amakholwa, isiZulu for 'The Believers'. The photographs foreground the intimate, affectionate ties between Zionist believers. Mlangeni uses close-up perspectives and full-frontal portraits to portray the bonds of support between fellow believers. These photographs also emphasize the egalitarian nature of Zionist community; they depict 'the believers' as a group of people amongst whom clerical hierarchies are largely invisible. The overall sense is of a horizontal gathering of young men and women. In this way, Mlangeni's photographs engage with my research's exploration of the importance of religious affiliation in transcending social divides by reconstituting individuals as 'believers', erasing former divisions of class, ethnicity and socio-economic status. In conversation with WAM, the project partner, I have identified four user communities who will benefit from creatively engaging them with the exhibition and the research underpinning it. These include 1000 secondary school students, 200 Zionist believers, 40 photography students and at least 3000 members of the Johannesburg public. With respect to the school audience, we have identified a need for high-quality discourse on the role of Zionism in the public sphere as this is largely absent from religious education curricula. The second audience - Zionist believers - would benefit from a visual representation of their religious identity by an 'insider' voice such as Mlangeni. Zionists' knowledge of their origins would be enhanced through their engagement with the exhibition's text panels and the catalogue. Photography students in South Africa need teaching on the intersection between photographic practice and depiction of religious life, while the South African public would benefit from thoughtful commentary on the significance of religious communities such as Zionism (which receives little coverage in the national media) for transcending social divides. These four audiences will be engaged via walk-arounds, a photography workshop and participation in religious rituals dynamically interacting with the exhibition. Audiences' engagement will be assessed through follow-up questionnaires, focus groups and media monitoring.

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  • Funder: Swiss National Science Foundation Project Code: 120889
    Funder Contribution: 22,000
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  • Funder: UK Research and Innovation Project Code: EP/E043151/1
    Funder Contribution: 96,370 GBP

    Threat reduction and nonproliferation activities urgently require improved radiation detectors. As such, it is vital that we move beyond the largely empirical approach of detector material discovery and optimization. We propose to integrate atomic scale computer simulation and experimental material science, to discover and optimize candidate scintillator detector material compositions. When appropriately coupled, these techniques will create a physics-based feedback loop, which will lead to an approach through which it is possible to optimize the energy resolution of candidate scintillators. Furthermore, this approach is independent of material type (system). Although single crystals are used here to determine scintillator properties, improvements in the understanding and control of defects can be incorporated into other material forms (e.g. nanophosphors or polycrystalline scintillators).While nonproliferation and security activities are beneficiaries of the proposed work, other activities will also directly benefit, such as high resolution radiography for passive evaluation of nuclear power installations. Furthermore, an active industrial market interested in detector development exists for applications such as oil well logging and medical imaging.The general requirements for detector materials are that they are dense (stopping power), bright (conversion of incident radiation energy to light output) and fast (quickly convert the incident energy to light output). While many current detector materials offer some of these properties (e.g. Tl doped NaI is bright and fast but not dense) there are families of compositions that offer improvements, in particular, rare earth oxides (which are much more dense) and halides (which are brighter).The majority of solid state systems for radiation detection require that the incident energy excites an electron that is initially associated with an activator ion embedded in a host lattice. Subsequently, the electron returns to the ground state and light is emitted (that can be detected electronically to produce a signal). This scintillation process depends crucially on the behaviour of the electron (and hole) and hence on the local environment of the activator ion in the crystal as well as the propensity for electrons or holes to become trapped at other defect sites in the lattice. Here three series of host materials and activators will be investigated, as a function of their constituent chemical species, using atomic scale computer simulation and experimental techniques and the results correlated with observed detector efficiency. By predicting defect behaviour, the atomic scale simulations will identify compositional regions of potential significance. Subsequently the experimental work, single crystal growth, luminescence, site selective excitation and Raman spectroscopy, will focus on the specific compositions and determine their properties. This provides a test of the simulation approach in addition to a verification of the efficacy of the materials as luminescence based radiation detectors. The combined approach will allow for a vital, defect property-based optimization, where historically improvements have been empirical.

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