2,533 research outputs found

    Adiabatic potentials for Rydberg atoms in a ponderomotive optical lattice

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    We calculate the adiabatic potentials and adiabatic wavefunctions of Rydberg atoms in a one-dimensional ponderomotive optical lattice. All lattice-induced couplings between the degenerate high-angular-momentum Rydberg states are taken into account. To obtain insight into the underlying physics, we analyze the numerical results in terms of effective electric and magnetic fields produced by the lattice. Near the inflection points of the lattice potential and for sufficiently low principal quantum numbers (nlsim35 in the cases studied), the adiabatic level structure resembles that of the dc Stark effect, and an effective electric-field model can be used to model the lattice-induced perturbation. Near the nodes and anti-nodes of the lattice field, the adiabatic level structure exhibits a combination of adjacent rotational and vibrational energy level sequences. Here, an analogy between the ponderomotive optical lattice and the diamagnetic problem works well to interpret the lattice-induced perturbation in terms of an effective magnetic field.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/85427/1/njp10_2_023031.pd

    Re-connecting the Spirit: Jamaican women poets and writers' approaches to spirituality and God

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    Chapter One asks whether Christianity and religion have been re-defined in the Jamaican context. The definitions of spirituality and mysticism, particularly as defined by Lartey are given and reasons for using these definitions. Chapter Two examines history and the Caribbean religious experience. It analyses theory and reflects on the Caribbean difference. The role that literary forefathers and foremothers have played in defining the writers about whom my research is concerned is examined in Chapter Three, as are some of their selected works. Chapter Four reflects on the work of Lorna Goodison, asks how she has defined God whether within a Christian or African framework. In contrast Olive Senior appears to view Christianity as oppressive and this is examined in Chapter Five. Chapter Six looks at the ways in which Erna Brodber re-connects the spirit. Chapter Seven regards the spiritually joyful God of Jean 'Binta' Breeze. Conclusions are then drawn as to whether writers have adapted a God to the Jamaican context, whether they have re-connected to the spirit and if it is true that Jamaica is a spiritual nation

    Exploring men's attitudes to mental fitness through sportspeople's lived experience

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    An interpretative phenomenological analysis sought to explore how male audience members experienced listening to mental health nurses alongside sportspeople who shared their lived stories of mental health problems in public through mental fitness sessions carried out by the mental health charity, State of Mind Sport. Six male participants were interviewed about their experience after attending an mental fitness session. Three superordinate themes emerged: ‘Evolving male openness about mental health’ looks at how the male audience members' perspective on being open about their mental health changed having been to the mental fitness session. Second, ‘Sportspeople's influence’ reflects upon the positive influence sportspeople's involvement in the mental fitness sessions has on male audience members. Finally, ‘The process of learning about mental health’ explores the educational impact the sessions appear to be having. The results demonstrated the mental fitness sessions had a positive impact and using sportspeople can improve mental health interventions with males and this has potential implications for mental health nursing interventions

    No difference found in time to publication by statistical significance of trial results: a methodological review

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    Objective: Time-lag from study completion to publication is a potential source of publication bias in randomised controlled trials. This study sought to update the evidence base by identifying the effect of the statistical significance of research findings on time to publication of trial results.Design: Literature searches were carried out in four general medical journals from June 2013 to June 2014 inclusive (BMJ, JAMA, the Lancet and the New England Journal of Medicine). Setting: Methodological review of four general medical journals. Participants: Original research articles presenting the primary analyses from phase 2, 3 and 4 parallel-group randomised controlled trials were included. Main outcome measures: Time from trial completion to publication.Results: The median time from trial completion to publication was 431 days (n ÂŒ 208, interquartile range 278–618). A multivariable adjusted Cox model found no statistically significant difference in time to publication for trials reporting positive or negative results (hazard ratio: 0.86, 95% CI 0.64 to 1.16, p ÂŒ 0.32). Conclusion: In contrast to previous studies, this review did not demonstrate the presence of time-lag bias in time to publication. This may be a result of these articles being published in four high-impact general medical journals that may be more inclined to publish rapidly, whatever the findings. Further research is needed to explore the presence of time-lag bias in lower quality studies and lower impact journals

    Girl Empower Intervention Baseline Survey

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    This report presents the results from the baseline assessment of the International Rescue Committee’s (IRC) Girl Empower (GE) program in Nimba County, Liberia. GE is a program in rural communities that seeks to help 13–to–14-year-old girls make healthy life choices and decrease their risk of sexual abuse. The program centers on weekly meetings between girls and trained local mentors, during which the girls learn about life skills and financial literacy. GE also holds monthly discussion groups for participants’ caregivers, and trains local health and psychosocial care providers on how to improve and expand services for survivors of gender-based violence. Girls are also equipped with savings accounts, and small deposits are made on their behalf. The GE baseline assessment is part of a randomized evaluation, which will assess the program’s impact. Primary investigators from the Population Council, the World Bank, and the IRC lead the evaluation’s research team, and Innovations for Poverty Action is responsible for the survey data collection

    Rydberg-atom trajectories in a ponderomotive optical lattice

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    Using semiclassical simulations, we investigate the trajectories and the microwave spectra of Rydberg atoms excited in a ponderomotive optical lattice. We relate distinct features found in the microwave spectra to characteristic types of trajectory. Several methods are presented that are designed to greatly improve the trapping efficiency of the lattice and to generalize the trapping from one to three dimensions.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/85435/1/njp10_11_113036.pd

    Barriers and facilitators of use of analytics for strategic health and care decision-making: a qualitative study of senior health and care leaders' perspectives.

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    OBJECTIVE: This study investigated the barriers and facilitators that senior leaders' experience when using knowledge generated from the analysis of administrative health or care records ('analytics') to inform strategic health and care decision-making. SETTING: One London-based sustainability and transformation partnership (STP) in England, as it was on the cusp of forming an integrated care system (ICS). PARTICIPANTS: 20 senior leaders, including health and social care commissioners, public health leads and health providers. Participants were eligible for inclusion if they were a senior leader of a constituent organisation of the STP and involved in using analytics to make decisions for their own organisations or health and care systems. DESIGN: Semi-structured interviews conducted between January 2020 and March 2020 and analysed using the framework method to generate common themes. RESULTS: Organisational fragmentation hindered use of analytics by creating siloed data systems, barriers to data sharing and different organisational priorities. Where trusted and collaborative relationships existed between leaders and analysts, organisational barriers were circumvented and access to and support for analytics facilitated. Trusted and collaborative relationships between individual leaders of different organisations also aided cross-organisational priority setting, which was a key facilitator of strategic health and care decision-making and use of analytics. Data linked across health and care settings were viewed as an enabler of use of analytics for decision-making, while concerns around data quality often stopped analytics use as a part of decision-making, with participants relying more so on expert opinion or intuition. CONCLUSIONS: The UK Governments' 2021 White Paper set out aspirations for data to transform care. While necessary, policy changes to facilitate data sharing across organisations will be insufficient to realise this aim. Better integration of organisations with aligned priorities could support and sustain cross-organisational relationships between leaders and analysts, and leaders of different organisations, to facilitate use of analytics in decision-making

    Cortical thickness is not associated with current depression in a clinical treatment study

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    BackgroundReduced cortical thickness is a candidate biological marker of depression, although findings are inconsistent. This could reflect analytic heterogeneity, such as use of region‐wise cortical thickness based on the Freesurfer Desikan–Killiany (DK) atlas or surface‐based morphometry (SBM). The Freesurfer Destrieux (DS) atlas (more, smaller regions) has not been utilized in depression studies. This could also reflect differential gender and age effects.MethodsCortical thickness was collected from 170 currently depressed adults and 52 never‐depressed adults. Visually inspected and approved Freesurfer‐generated surfaces were used to extract cortical thickness estimates according to the DK atlas (68 regions) and DS atlas (148 regions) for region‐wise analysis (216 total regions) and for SBM.ResultsOverall, except for small effects in a few regions, the two region‐wise approaches generally failed to discriminate depressed adults from nondepressed adults or current episode severity. Differential effects by age and gender were also rare and small in magnitude. Using SBM, depressed adults showed a significantly thicker cluster in the left supramarginal gyrus than nondepressed adults (P = 0.047) but there were no associations with current episode severity.ConclusionsThree analytic approaches (i.e., DK atlas, DS atlas, and SBM) converge on the notion that cortical thickness is a relatively weak discriminator of current depression status. Differential age and gender effects do not appear to represent key moderators. Robust associations with demographic factors will likely hinder translation of cortical thickness into a clinically useful biomarker. Hum Brain Mapp, 2017. © 2017 Wiley Periodicals, Inc. Hum Brain Mapp 38:4370–4385, 2017. © 2017 Wiley Periodicals, Inc.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/138250/1/hbm23664_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/138250/2/hbm23664.pd
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