1,721,209 research outputs found
Food Deserts
No full textThis chapter investigates the physical, social, and economic elements of food access and synthesizes the findings from the extant international literature, specifically exploring how food deserts have been defined and operationalized, and the key concepts and debates surrounding this term. A review of the evidence for the existence of food deserts follows, taking account of both observational and intervention studies. The relationship between food access and health outcomes, and the qualitative work on the experience of living in a “food desert” and how this affects food consumption patterns, are evaluated. There are typically three components that define a food desert: food access, food affordability, and food availability. Retail food access is an important factor in individual diet. Poor food access and the presence of food deserts certainly may contribute to ill health in some areas, but the effects of food deserts are mediated by a number of factors
Understanding the health and wellbeing challenges of the foodbanking system: a qualitative study of food bank users, providers and referrers in London
No full textIn the UK, food poverty has been associated with conditions such as obesity, malnutrition, hypertension, iron deficiency, and impaired liver function. Food banks, the primary response to food poverty on the ground, typically rely on community referral and distribution systems that involve health and social care professionals and local authority public health teams. The perspectives of these key stakeholders remain underexplored. This paper reports on a qualitative study of the health and wellbeing challenges of food poverty and food banking in London. An ethnographic investigation of food bank staff and users was carried out alongside a series of healthcare stakeholder interviews. A total of 42 participants were interviewed. A Critical Grounded Theory (CGT) analysis revealed that contemporary lived experiences of food poverty are embedded within and symptomatic of extreme marginalisation, which in turn impacts upon health. Specifically, food poverty was conceptualised by participants to: firstly, be a barrier to providing adequate care and nutrition for young children; secondly, be exacerbated by lack of access to adequate fresh food, food storage and cooking facilities; and thirdly, amplify existing health and social problems. Further investigation of the local government structures and professional roles that both rely upon and serve to further embed the food banking system is necessary in order to understand the politics of changing welfare landscapes
Obese Cities: How Our Environment Shapes Overweight
No full textAbstract
The rapid rise in obesity rates over the last 30 years has profound implications for the health of populations. That this rise has occurred over a relatively short biological time scale suggests that changes in the environments to which we are exposed may be to blame, rather than individual genetic endowment. Focusing on developed world nations, this article briefly reviews this emerging ‘ecological’ perspective in the search for the causes of obesity. This article explores how aspects of our environment might disrupt ‘energy balance’ through influencing food consumption and physical activity. It focuses on three hypothesised pathways for environmental risk: the organisation of built physical space, the social environment and the political environment. The article demonstrates that a consideration of scale and context are also important in the search for the environmental drivers of weight gain
Food banking and emergency food aid: expanding the definition of local food environments and systems.
Full text linkIf current trends in food insecurity continue then the diets of low-income people may become characterised by the inclusion of significant amounts of donated and surplus food accessed via the third-sector. These developments have yet to be integrated into macro models and concepts of the food environment. Addressing this caveat is necessary in order to both help build an evidence base to challenge policies that exacerbate the drivers of food insecurity and to inform interventions aimed at improving the diets of disadvantaged populations
Does the local food environment around schools affect diet? Longitudinal associations in adolescents attending secondary schools in East London.
Full text linkBACKGROUND: The local retail food environment around schools may act as a potential risk factor for adolescent diet. However, international research utilising cross-sectional designs to investigate associations between retail food outlet proximity to schools and diet provides equivocal support for an effect. In this study we employ longitudinal perspectives in order to answer the following two questions. First, how has the local retail food environment around secondary schools changed over time and second, is this change associated with change in diet of students at these schools? METHODS: The locations of retail food outlets and schools in 2001 and 2005 were geo-coded in three London boroughs. Network analysis in a Geographic Information System (GIS) ascertained the number, minimum and median distances to food outlets within 400 m and 800 m of the school location. Outcome measures were 'healthy' and 'unhealthy' diet scores derived from adolescent self-reported data in the Research with East London Adolescents: Community Health Survey (RELACHS). Adjusted associations between distance from school to food retail outlets, counts of outlets near schools and diet scores were assessed using longitudinal (2001-2005 n=757) approaches. RESULTS: Between 2001 and 2005 the number of takeaways and grocers/convenience stores within 400 m of schools increased, with many more grocers reported within 800 m of schools in 2005 (p< 0.001). Longitudinal analyses showed a decrease of the mean healthy (-1.12, se 0.12) and unhealthy (-0.48, se 0.16) diet scores. There were significant positive relationships between the distances travelled to grocers and healthy diet scores though effects were very small (0.003, 95%CI 0.001 - 0.006). Significant negative relationships between proximity to takeaways and unhealthy diet scores also resulted in small parameter estimates. CONCLUSIONS: The results provide some evidence that the local food environment around secondary schools may influence adolescent diet, though effects were small. Further research on adolescents' food purchasing habits with larger samples in varied geographic regions is required to identify robust relationships between proximity and diet, as small numbers, because of confounding, may dilute effect food environment effects. Data on individual foods purchased in all shop formats may clarify the frequent, overly simple classification of grocers as 'healthy'
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Health geographies: a critical introduction
No full textHealth Geographies: A Critical Introduction explores health and biomedical topics from a range of critical geographic perspectives. Building on the field’s past engagement with social theory it extends the focus of health geography into new areas of enquiry.•Introduces key topics in health geography through clear and engaging examples and case studies drawn from around the world•Incorporates multi-disciplinary perspectives and approaches applied in the field of health geography•Identifies both health and biomedical issues as a central area of concern for critically oriented health geographers•Features material that is alert to questions of global scale and difference, and sensitive to the political and economic as well sociocultural aspects of health•Provides extensive pedagogic materials within the text and guidance for further stud
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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