1,403 research outputs found

    Decision aids for randomised controlled trials : a qualitative exploration of stakeholders' views

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    Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions. Funding: This work was supported by personal fellowship award (to KG) from the Chief Scientist Office of the Scottish Governments Health and Social Care Directorates, grant number [PDF/09/01]. The Health Services Research Unit is supported by a core grant from the Chief Scientist Office of the Scottish Government Health and Social Care Directorates.Peer reviewedPublisher PD

    Order 3 Symmetry in the Clifford Hierarchy

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    We investigate the action of the first three levels of the Clifford hierarchy on sets of mutually unbiased bases comprising the Ivanovic MUB and the Alltop MUBs. Vectors in the Alltop MUBs exhibit additional symmetries when the dimension is a prime number equal to 1 modulo 3 and thus the set of all Alltop vectors splits into three Clifford orbits. These vectors form configurations with so-called Zauner subspaces, eigenspaces of order 3 elements of the Clifford group highly relevant to the SIC problem. We identify Alltop vectors as the magic states that appear in the context of fault-tolerant universal quantum computing, wherein the appearance of distinct Clifford orbits implies a surprising inequivalence between some magic states.Comment: 20 pages, 2 figures. Published versio

    Public Health and History: Vaccination Regulation in the Northeastern States

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    In 1905 Henning Jacobson went before the United States Supreme Court in Jacobson v. Massachusetts and argued that his constitutional right to liberty was infringed upon when compulsory vaccination laws were introduced. When mandatory vaccination laws were introduced in Cambridge, Massachusetts there was another deadly smallpox epidemic racing through the northeastern states. Government officials believed that the best way to control the disease and ultimately stop the spread was through government intervention. The Supreme Court ultimately ruled that as a citizen of the United States it is often times necessary to give up some forms of liberty in order to protect the safety and health of the community as a whole, in this case receiving the vaccination for the wellbeing of everyone. Smallpox brought persistent epidemics over the centuries throughout the founding of the United States, until its eradication in the late 1900s. By looking at the introduction of inoculation and vaccination in the United States the need for government intervention in public health matters becomes clearer and helps to strengthen the argument of the Supreme Court ruling. Opposition and controversy will always be present in America, but the ability to recognize what being a citizen of the United States, during a public health crisis, means allows one to fully acknowledge the need to take the necessary precautions to benefit the health of all and stop the spread, in hopes of ultimately leading to eradication

    Prayer-for Joan

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    A Gel Probe Equilibrium Sampler for Measuring Arsenic Porewater Profiles and Sorption Gradients in Sediments: I. Laboratory Development

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    A gel probe equilibrium sampler has been developed to study arsenic (As) geochemistry and sorption behavior in sediment porewater. The gels consist of a hydrated polyacrylamide polymer, which has a 92% water content. Two types of gels were used in this study. Undoped (clear) gels were used to measure concentrations of As and other elements in sediment porewater. The polyacrylamide gel was also doped with hydrous ferric oxide (HFO), an amorphous iron (Fe) oxyhydroxide. When deployed in the field, HFO-doped gels introduce a fresh sorbent into the subsurface thus allowing assessment of in situ sorption. In this study, clear and HFO-doped gels were tested under laboratory conditions to constrain the gel behavior prior to field deployment. Both types of gels were allowed to equilibrate with solutions of varying composition and re-equilibrated in acid for analysis. Clear gels accurately measured solution concentrations (±1%), and As was completely recovered from HFO-doped gels (±4%). Arsenic speciation was determined in clear gels through chromatographic separation of the re-equilibrated solution. For comparison to speciation in solution, mixtures of As(III) and As(V) adsorbed on HFO embedded in gel were measured in situ using X-ray absorption spectroscopy (XAS). Sorption densities for As(III) and As(V) on HFO embedded in gel were obtained from sorption isotherms at pH 7.1. When As and phosphate were simultaneously equilibrated (in up to 50-fold excess of As) with HFO-doped gels, phosphate inhibited As sorption by up to 85% and had a stronger inhibitory effect on As(V) than As(III). Natural organic matter (>200 ppm) decreased As adsorption by up to 50%, and had similar effects on As(V) and As(III). The laboratory results provide a basis for interpreting results obtained by deploying the gel probe in the field and elucidating the mechanisms controlling As partitioning between solid and dissolved phases in the environment

    Trauma-Informed Practices for Test-Taking Anxiety at the Elementary Grade Level

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    Test -Taking Anxiety (TTA) is a challenging experience for children of all ages. Childhood exposure to trauma and adverse experience has been increasing. Fortunately, trauma-informed practices, such as mindfulness activities have become more widespread in schools throughout the last few years. Existing school counseling literature offers limited perspectives on how school counselors can support elementary students for TTA. This conceptual article explores the effects of trauma-informed practices on elementary-age students\u27 test anxiety and overall academic success in schools and offers implications for practice
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