1,943 research outputs found

    A Bibliography of Aboriginal Archaeological Plant Food Remains From Eastern North America: 1901-1991

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    Research Report No. 11, Research Laboratories of Archaeology, University of North Carolina at Chapel Hill. Reports in this series discuss the findings of archaeological excavations and research projects undertaken by the RLA between 1984 and present

    Characterizations of quasitrivial symmetric nondecreasing associative operations

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    We provide a description of the class of n-ary operations on an arbitrary chain that are quasitrivial, symmetric, nondecreasing, and associative. We also prove that associativity can be replaced with bisymmetry in the definition of this class. Finally we investigate the special situation where the chain is finite

    Titania-doped tantala/silica coatings for gravitational-wave detection

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    Reducing thermal noise from optical coatings is crucial to reaching the required sensitivity in next generation interferometric gravitational-wave detectors. Here we show that adding TiO2 to Ta2O5 in Ta2O5/SiO2 coatings reduces the internal friction and in addition present data confirming it reduces thermal noise. We also show that TiO2-doped Ta2O5/SiO2 coatings are close to satisfying the optical absorption requirements of second generation gravitational-wave detectors

    Organization of Block Copolymers using NanoImprint Lithography: Comparison of Theory and Experiments

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    We present NanoImprint lithography experiments and modeling of thin films of block copolymers (BCP). The NanoImprint lithography is used to align perpendicularly lamellar phases, over distances much larger than the natural lamellar periodicity. The modeling relies on self-consistent field calculations done in two- and three-dimensions. We get a good agreement with the NanoImprint lithography setups. We find that, at thermodynamical equilibrium, the ordered BCP lamellae are much better aligned than when the films are deposited on uniform planar surfaces

    New approaches to measuring anthelminthic drug efficacy: parasitological responses of childhood schistosome infections to treatment with praziquantel

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    By 2020, the global health community aims to control and eliminate human helminthiases, including schistosomiasis in selected African countries, principally by preventive chemotherapy (PCT) through mass drug administration (MDA) of anthelminthics. Quantitative monitoring of anthelminthic responses is crucial for promptly detecting changes in efficacy, potentially indicative of emerging drug resistance. Statistical models offer a powerful means to delineate and compare efficacy among individuals, among groups of individuals and among populations.; We illustrate a variety of statistical frameworks that offer different levels of inference by analysing data from nine previous studies on egg counts collected from African children before and after administration of praziquantel.; We quantify responses to praziquantel as egg reduction rates (ERRs), using different frameworks to estimate ERRs among population strata, as average responses, and within strata, as individual responses. We compare our model-based average ERRs to corresponding model-free estimates, using as reference the World Health Organization (WHO) 90 % threshold of optimal efficacy. We estimate distributions of individual responses and summarize the variation among these responses as the fraction of ERRs falling below the WHO threshold.; Generic models for evaluating responses to anthelminthics deepen our understanding of variation among populations, sub-populations and individuals. We discuss the future application of statistical modelling approaches for monitoring and evaluation of PCT programmes targeting human helminthiases in the context of the WHO 2020 control and elimination goals

    Canada-Africa Relations in Changing Core-Periphery Dynamics: A Chance to "Come Back" Differently

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    The Department of Foreign Affairs Canada sees the dynamism at play across the African continent as calling out for Canadian engagement. Africa in the twenty-first century is no longer the continent emerging from colonial rule; it seeks new forms of relationships with international partners. The African Development Bank, for instance, has identified five priorities for inclusive growth on the continent. The challenges are huge, as is the potential for transformative change. But the conditions for international collaboration in achieving these goals have changed; African leaders are seeking new forms of associations and teamwork. Canada has an opportunity to "come back" differently if it can look beyond its narrow mining interests and become an active partner working with public authorities in need of new and bold international partnerships. Unfortunately, Trudeau's "Canada is back" campaign does not look set to change the status quo. And, in a world where the political economic power is moving east, African countries do not have much reason to listen to Canada

    Delineation of Cohen Syndrome Following a Large-Scale Genotype-Phenotype Screen

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    Cohen syndrome is an autosomal recessive condition associated with developmental delay, facial dysmorphism, pigmentary retinopathy, and neutropenia. The pleiotropic phenotype, combined with insufficient clinical data, often leads to an erroneous diagnosis and has led to confusion in the literature. Here, we report the results of a comprehensive genotype-phenotype study on the largest cohort of patients with Cohen syndrome assembled to date. We found 22 different COH1 mutations, of which 19 are novel, in probands identified by our diagnostic criteria. In addition, we identified another three novel mutations in patients with incomplete clinical data. By contrast, no COH1 mutations were found in patients with a provisional diagnosis of Cohen syndrome who did not fulfill the diagnostic criteria (“Cohen-like” syndrome). This study provides a molecular confirmation of the clinical phenotype associated with Cohen syndrome and provides a basis for laboratory screening that will be valuable in its diagnosis

    Navigating the micro-politics of major system change: the implementation of Sustainability Transformation Partnerships in the English health and care system

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    Objective: To investigated how health and care leaders navigate the micro-politics of major system change as manifest in the formulation and implementation of Sustainability and Transformation Partnerships (STPs) in the English National Health Service. Methods: A comparative qualitative case study of three STPs carried out between 2018-21. Data collection comprises 72 semi-structured interviews with STP leaders and stakeholders; 49 hours of observations of STP executive meetings, management teams and thematic committees; and documentary sources. Interpretative analysis involved developing individual and cross case reports to understand the 'disagreements, 'people and interests', and the 'skills, behaviours and practice'. Findings: Three linked political fault-lines underpin the micro-politics of formulating and implementing STPs: differences in meaning and value, perceptions of winners and losers and structural differences in power and influence. In managing these issues, STP leaders engaged in a range of complementary strategies to understand and reconcile meanings, appraise and manage risks and benefits, and to redress longstanding power imbalances, as well as those related to their own ambiguous position.Conclusion: Given the lack of formal authority and breadth of system change, navigating the micro-politics of major system change requires political skills in listening and engagement, strategic appraisal of the political landscape, and effective negotiation and consensus-building

    Understanding the Political Skills and Behaviours for Leading the Implementation of Health Services Change: A Qualitative Interview Study

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    Background: The implementation of change in health and care services is often complicated by organisational micro-politics. There are calls for those leading change to develop and utilise political skills and behaviours to understand and mediate such politics, but to date only limited research offers a developed empirical conceptualisation of the political skills and behaviours for leading health services change. Methods: A qualitative interview study was undertaken with 66 healthcare leaders from the English National Health Service (NHS). Participants were sampled on the basis of their variable involvement in leading change processes, taking into account anticipated differences in career stage, leadership level and role, care sector, and professional backgrounds. Interpretative data analysis led to the development of five themes. Results: Participants’ accounts highlighted five overarching sets of political skills and behaviours: personal and inter-personal qualities relating to self-belief, resilience and the ability to adapt to different audiences; strategic thinking relating to the ability to understand the wider and local political landscape from which to develop realistic plans for change; communication skills for engaging and influencing stakeholders, especially for understanding and mediating stakeholders’ competing interests; networks and networking in terms of access to resources, and building connections between stakeholders; and relational tactics for dealing with difficult individuals through more direct forms of negotiation and persuasion. Conclusion: The study offers further empirical insight the existing literature on healthcare organisational politics by describing and conceptualising the political skills and behaviours of implementing health services change
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