Providing the Basis for Innovative Improvements in Advanced LWR Reactor Passive Safety Systems Design: An Educational R&D Project

This project characterizes typical two-phase stratified flow conditions in advanced water reactor horizontal pipe sections, following activation of passive cooling systems. It provides (1) a means to educate nuclear engineering students regarding the importance of two-phase stratified flow in passive cooling systems to the safety of advanced reactor systems and (2) describes the experimental apparatus and process to measure key parameters essential to consider when designing passive emergency core cooling flow paths that may encounter this flow regime. Based on data collected, the state of analysis capabilities can be determined regarding stratified flow in advanced reactor systems and the best paths forward can be identified to ensure that the nuclear industry can properly characterize two-phase stratified flow in passive emergency core cooling systems

Transpiration from subarctic deciduous woodlands: environmental controls and contribution to ecosystem evapotranspiration

Potential land‐climate feedbacks in subarctic regions, where rapid warming is driving forest expansion into the tundra, may be mediated by differences in transpiration of different plant functional types. Here we assess the environmental controls of overstorey transpiration and its relevance for ecosystem evapotranspiration in subarctic deciduous woodlands. We measured overstorey transpiration of mountain birch canopies and ecosystem evapotranspiration in two locations in northern Fennoscandia, having dense (Abisko) and sparse (Kevo) overstories. For Kevo, we also upscale chamber‐measured understorey evapotranspiration from shrubs and lichen using a detailed land cover map. Sub‐daily evaporative fluxes were not affected by soil moisture, and showed similar controls by vapour pressure deficit and radiation across sites. At the daily timescale, increases in evaporative demand led to proportionally higher contributions of overstorey transpiration to ecosystem evapotranspiration. For the entire growing season, the overstorey transpired 33% of ecosystem evapotranspiration in Abisko and only 16% in Kevo. At this latter site, the understorey had a higher leaf area index and contributed more to ecosystem evapotranspiration compared to the overstorey birch canopy. In Abisko, growing season evapotranspiration was 27% higher than precipitation, consistent with a gradual soil moisture depletion over the summer. Our results show that overstorey canopy transpiration in subarctic deciduous woodlands is not the dominant evaporative flux. However, given the observed environmental sensitivity of evapotranspiration components, the role of deciduous trees in driving ecosystem evapotranspiration may increase with the predicted increases in tree cover and evaporative demand across subarctic regions

Community sport and the politics of ageing: co-design and partnership approaches to understanding the embodied experiences of low-income older people.

© 2019 Mansfield, Kay, Anokye and Fox-Rushby. The promotion of physical activity for older people is dominated by biomedically informed polices emphasising the prescription of exercise as medicine and a universal approach to the promotion of active ageing in later life. Yet, more recent research recognises that being physically active in later life is complex and contested, shaped by the intersections of biological, psychological and sociological experiences, and requires differentiated responses that address this complexity. There is a disconnect between research, policy and the physical activity experiences of older people which leads to over-generalised policy and practice in the promotion and delivery of community sport to older people. This paper presents findings from a complex community sport project employing a coproduction framework with low income older age people. Participatory community approaches including focus group discussions, and extended observations and informal conversations throughout the project develop understanding of the complexities of ageing and community sport engagement among older people with limited income. Three themes are identified and discussed: (1) lived experience, ageing bodies and the changing dynamics of involvement in sport and exercise in the life course, (2) embodying ageing - moving beyond practical barriers for understanding ageing, lived experience and being physically active, and (3) corporeal pleasures of older sporting bodies. The paper concludes that there is a need to explore the significance of locally specific public knowledge from older people which directly addresses the complexity and inequalities of individuals’ everyday lives in their communities; lived experiences likely to impact on preferences for, engagement in, and enjoyment of physical activity.Sport England’s Get Healthy, Get Active for the Health and Sport Engagement Projec

UV-B absorbing pigments in spores: biochemical responses to shade in a high-latitude birch forest and implications for sporopollenin-based proxies of past environmental change

Current attempts to develop a proxy for Earth’s surface ultraviolet-B (UV-B) flux focus on the organic chemistry of pollen and spores because their constituent biopolymer, sporopollenin, contains UV-B absorbing pigments whose relative abundance may respond to the ambient UV-B flux. Fourier transform infrared (FTIR) microspectroscopy provides a useful tool for rapidly determining the pigment content of spores. In this paper, we use FTIR to detect a chemical response of spore wall UV-B absorbing pigments that correspond with levels of shade beneath the canopy of a high-latitude Swedish birch forest. A 27% reduction in UV-B flux beneath the canopy leads to a significant (p<0.05) 7.3% reduction in concentration of UV-B absorbing compounds in sporopollenin. The field data from this natural flux gradient in UV-B further support our earlier work on sporopollenin-based proxies derived from sedimentary records and herbaria collections

Boreal permafrost thaw amplified by fire disturbance and precipitation increases

Permafrost soils store huge amounts of organic carbon, which could be released if climate change promotes thaw. Currently, modelling studies predict that thaw in boreal regions is mainly sensitive to warming, rather than changes in precipitation or vegetation cover. We evaluate this conclusion for North American boreal forests using a detailed process-based model parameterised and validated on field measurements. We show that soil thermal regimes for dominant forest types are controlled strongly by soil moisture and thus the balance between evapotranspiration and precipitation. Under dense canopy cover, high evapotranspiration means a 30% increase in precipitation causes less thaw than a 1 °C increase in temperature. However, disturbance to vegetation promotes greater thaw through reduced evapotranspiration, which results in wetter, more thermally conductive soils. In such disturbed forests, increases in precipitation rival warming as a direct driver of thaw, with a 30% increase in precipitation at current temperatures causing more thaw than 2 °C of warming. We find striking non-linear interactive effects on thaw between rising precipitation and loss of leaf area, which are of concern given projections of greater precipitation and disturbance in boreal forests. Inclusion of robust vegetation-hydrological feedbacks in global models is therefore critical for accurately predicting permafrost dynamics; thaw cannot be considered to be controlled solely by rising temperatures

'Once I had money in my pocket, I was every colour under the sun': Using 'appearance biographies' to explore the meanings of appearance for people with dementia

Appearance and the work invested in it by and for people with dementia are a neglected issue within dementia studies. In policy and practice there exists an assumption that the role of supporting a person to manage their appearance is easily assumed by another within caring encounters, only to be subsumed within the daily task-oriented provision of care. This paper reports on interviews conducted as part of the Hair and Care project, which explored questions of appearance and the meanings it holds with people with dementia. The research used &lsquo;appearance biographies', a method which allows for a range of topics to be considered about appearance throughout the life course, acting as a conduit for reminiscence and life story work. The paper reports on the key themes and findings from these interviews, discussing them in the context of a wider debate on dementia, self-expression and agency. A key question posed by the authors is whether appearance and the work invested in it are legitimate considerations for dementia care policy and practice. And if so, how should we make sense of this work and what significance should we attach to it? In seeking to answer these questions the authors position the perspectives and experiences of people with dementia as central to their analysis. A narrative framework is suggested as a useful basis on which to understand the work of managing appearance over the life course. The implications for policy and practice are outlined

Empirical research into white racialized identities in Britain

The intellectual project of using whiteness as an explicit tool of analysis is not one that has taken root in Britain. However, there are a number of empirical studies that investigate the racialization of white identities. In this article, I look at some empirical sociological fieldwork carried out on white identities in Britain since the early 1990s and identify the key themes arising. These themes are (in)visibility, norms and values, cultural capital and integration, contingent hierarchies and Empire in the present. In Britain, a pertinent distinction is between rural and urban settings for the enactment of white identities vis-à-vis those of minorities, and there is an exploration of some of the contingency that draws the boundary between ‘white’ and ‘Other’ in different places. Areas of commonality and distinctiveness are noted in terms of the American work. In the last section, I argue that there are a number of issues to resolve around continuing such studies, including linking the micro-level to the macro-level analysis, and expanding to international comparative work

Erratum: Sequence data and association statistics from 12,940 type 2 diabetes cases and controls.

This corrects the article DOI: 10.1038/sdata.2017.179

An Ethnographer Lured into Darkness

No matter the combination of methods ethnographers bring to their research design and to participant observation, our pursuit to log, interpret, analyse and present the lives of those we meet is never an entirely intellectual or objective one. Ethnographic fieldwork is intimately sensory (Pink, Doing sensory ethnography, Sage, London, 2015), invokes our imagination (Sparkes, Qualitative research in sport and exercise, 1:21–35, 2009) and requires us to actively navigate social landscapes (Hammersley and Atkinson, Field relations. Ethnography: Principles in practice, Routledge, Stoodleigh, 2007). There is a tendency for these elements to fade in terms of visibility and immediacy within the research process. For those in accord with (Davies, Reflexive ethnography: A guide to researching selves and others, Routledge, New York, 2008), continuous reflexive labour becomes a core praxis to monitor the ways we observe and participate in this textured environment. Without this, we are left in the dark and are less able to see how we can (or should) respond to the nitty–gritty qualitative nature of ethnography. In this Chapter, two of methodological vignettes will act as entry points to unpack a set of tensions that commanded my attention during an eighteen months ethnography in Higher Education. ‘You Look Like an Ivory Tower Student’, for example, begins to troubleshoot ethnographic participation within educational environments. ‘Going Dark’, on the other hand, problematises the prioritisation of visual observations that are implicit in ethnographic tradition. Throughout these discussions a metaphor of being lured into darkness is offered as a productive orientation for ethnography