2,929 research outputs found

    Neutrino Physics at DPF 2013

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    The field of neutrino physics was covered at DPF 2013 in 32 talks, including three on theoretical advances and the remainder on experiments that spanned at least 17 different detectors. This summary of those talks cannot do justice to the wealth of information presented, but will provide links to other material where possible. There were allso two plenary session contributions on neutrino physics at this meeting: the current status of what we know about neutrino (oscillation) physics was outlined by Huber, and the next steps in long baseline oscillation expeirments were described by Fleming. This article covers a subset of the topics discussed at the meeting, with emphasis given to those talks that showed data or new results.Comment: Presentation at the DPF 2013 Meeting of the American Physical Society Division of Particles and Fields, Santa Cruz, California, August 13-17, 201

    A Small Target Neutrino Deep-Inelastic Scattering Experiment at the First Muon Collider

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    Several different scenarios for neutrino scattering experiments using a neutrino beam from the muon collider complex are discussed. The physics reach of a neutrino experiment at the front end of a muon collider is shown to extend far beyond that of current neutrino experiments, since the high intensity neutrino beams one would see at the muon collider allow for a large flexibility in choosing neutrino targets. Measurements of quark spin, A-dependence of the structure function xF3xF_3 and neutral current chiral couplings to quarks are outlined.Comment: 7 pages, 2 figures, to appear in the proceedings of the Workshop on Physics at the First Muon Collider and at the Front End of a Muon Collider, November 1997, Fermila

    Welfare and Family Economic Security: Toward a Place-Based Poverty Knowledge

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    The Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) of 1996 is viewed by many as a resounding success. Its success, however, is predicated primarily on caseload reduction rather than improvement of family well-being. In addition, provisions in the act ignore the importance of place in shaping one\u27s life chances. Using Alice O\u27Connor\u27s influential book, Poverty Knowledge, as a framework, we discuss findings from a qualitative study that examines how low-income families plan for a life without welfare in places with different opportunities and structural constraints. We find that returns to TANF are common among welfare leavers and that place plays a role in influencing the decision to use and return to welfare. The findings also suggest that states\u27 one size fits all welfare policies fail to address the major needs of low-income women attempting to move off TANF and that, until adequate policies are created, economic insecurity and poor family well-being will remain the norm for many former TANF recipients

    Welfare and Family Economic Security: Toward a Place-Based Poverty Knowledge

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    The Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) of 1996 is viewed by many as a resounding success. Its success, however, is predicated primarily on caseload reduction rather than improvement of family well-being. In addition, provisions in the act ignore the importance of place in shaping one\u27s life chances. Using Alice O\u27Connor\u27s influential book, Poverty Knowledge, as a framework, we discuss findings from a qualitative study that examines how low-income families plan for a life without welfare in places with different opportunities and structural constraints. We find that returns to TANF are common among welfare leavers and that place plays a role in influencing the decision to use and return to welfare. The findings also suggest that states\u27 one size fits all welfare policies fail to address the major needs of low-income women attempting to move off TANF and that, until adequate policies are created, economic insecurity and poor family well-being will remain the norm for many former TANF recipients

    Cultural adaptation of self-management of type 2 diabetes in Saudi Arabia (qualitative study)

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    Background: Saudi Arabia is continuously working on developing its health care system, however with the high prevalence of type 2 diabetes and comorbidities, such as cardiovascular diseases, self-management education programmes are essential. As part of a planned series of studies to develop a culturally sensitive type 2 diabetes self-management programme, this study explores the need versus barriers and facilitators relevant to implementing a national programme for type 2 diabetes self-management education within the community and health care system in Saudi Arabia. Methods: A qualitative methodology was used to explore the views of a multidisciplinary group of diabetes health professionals and adult patients with type 2 diabetes. The views of nine health professionals working at a specialised diabetes care centre were gathered at two focus groups (four and five) that included doctors, nutritionists, health educators and nurses. Individual interviews with 12 patients with type 2 diabetes (six females and six males) attending the centre were also carried out. Recurring themes through the translated transcripts were studied and treated by the research group under pre-set protocols. Results: Focus groups with health professionals revealed three main themes. 1. Resources: availability of resources and how they impacted on performance and patients’ care; 2.Familiarity with self-management education programmes: educating patients and raising awareness among them; and 3. Lifestyle: patients’ lifestyle and how it could affect their compliance with self-management programmes. Interviews with patients also revealed three main themes. 1. Habits: post diagnosis changes in patients’ attitudes and behaviours towards diet and physical activity; 2. Health education: awareness of managing type 2 diabetes through health centre advice or self-education; and 3. Culture and society: a lack of cultural or social support created by some social practices or conventions. Conclusion: The findings from this study highlight a gap in type 2 diabetes care system that can be breached through the development of a Saudi specific self-management programme for type 2 diabetes. The identified barriers and facilitators can be used for adapting a self-management programme to the Saudi context. However, initial training is needed for local health professionals to understand the mechanisms of self-management programmes. Such programmes will need to infiltrate to the society, and the patients’ families, in particular to tackle the rising prevalence of type 2 diabetes in Saudi Arabia and provide a friendlier, more supportive environment for the current patients to self-manage their diabetes

    Measurement errors in body size of sea scallops (Placopecten magellanicus) and their effect on stock assessment models

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    Body-size measurement errors are usually ignored in stock assessments, but may be important when body-size data (e.g., from visual sur veys) are imprecise. We used experiments and models to quantify measurement errors and their effects on assessment models for sea scallops (Placopecten magellanicus). Errors in size data obscured modes from strong year classes and increased frequency and size of the largest and smallest sizes, potentially biasing growth, mortality, and biomass estimates. Modeling techniques for errors in age data proved useful for errors in size data. In terms of a goodness of model fit to the assessment data, it was more important to accommodate variance than bias. Models that accommodated size errors fitted size data substantially better. We recommend experimental quantification of errors along with a modeling approach that accommodates measurement errors because a direct algebraic approach was not robust and because error parameters were diff icult to estimate in our assessment model. The importance of measurement errors depends on many factors and should be evaluated on a case by case basis

    Beam Tests of Ionization Chambers for the NuMI Neutrino Beam

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    We have conducted tests at the Fermilab Booster of ionization chambers to be used as monitors of the NuMI neutrino beamline. The chambers were exposed to proton fluxes of up to 1012^{12} particles/cm2^2/1.56Ό\mus. We studied space charge effects which can reduce signal collection from the chambers at large charged particle beam intensities.Comment: submitted to IEEE Trans Nucl. Sc

    Food Insecurity among Children in Massachusetts

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    This article focuses on the prevalence among Massachusetts children and families of food insecurity, inadequate access to enough nutritious food for an active and healthy life. It summarizes research findings on the association of food insecurity with less optimal children’s health and development from the prenatal period through adolescence. Food insecurity also correlates with other material hardships, such as housing and energy insecurity. Data show families’ participation in public nutrition and other assistance program is associated with decreased prevalence of food insecurity and with mitigation of its impact on children’s health and well-being. The article concludes with recommendations for policy action at the federal and state level that could enhance Massachusetts’ children’s food security by streamlining and increasing access to federal nutrition and other assistance programs
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