181 research outputs found

    Mass freezing in growing neutrino quintessence

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    Growing neutrino quintessence solves the coincidence problem for dark energy by a growing cosmological value of the neutrino mass which emerges from a cosmon-neutrino interaction stronger than gravity. The cosmon-mediated attraction between neutrinos induces the formation of large scale neutrino lumps in a recent cosmological epoch. We argue that the non-linearities in the cosmon field equations stop the further increase of the neutrino mass within sufficiently dense and large lumps. As a result, we find the neutrino induced gravitational potential to be substantially reduced when compared to linear extrapolations. We furthermore demonstrate that inside a lump the possible time variation of fundamental constants is much smaller than their cosmological evolution. This feature may reconcile current geophysical bounds with claimed cosmological variations of the fine structure constant.Comment: 15 pages, 12 figures. Version published in PR

    To Read or to Listen: The Effect of Text-to-Speech Software and Accents on Comprehension of Digital Media

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    Text-to-speech software is a popular tool for consuming information for school, work, and recreation. This study examined two aspects of text-to-speech information exposure: the effect of audio/text modality and type of accent. In Experiment one, participants received material presented in a text-only, audio-only, or dual format. Those who received the material as text-only had significantly higher scores on a comprehension test and higher score predictions than those in the audio-only condition. In Experiment two, participants were presented with audio material in a text-to-speech-generated U.S. English, Mandarin Chinese, or Italian accent. Results revealed that accent did not significantly impact retention or performance predictions. These findings call into question the use of text-to-speech software as an “easier” way to retain information

    A systematic review and meta-synthesis of the qualitative research into mandatory personal psychotherapy during training

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    Background: This study addresses the thorny issue of mandatory personal psychotherapy within counselling and psychotherapy training. It is expensive, emotionally demanding and time-consuming. Nevertheless, proponents argue that it is essential in protecting the public and keeping clients safe; to ensure psychotherapists develop high levels of self-awareness and gain knowledge of interpersonal dynamics; and that it enhances therapist effectiveness. Existing evidence about these potential benefits is equivocal and is largely reliant on small-scale qualitative studies. Method: We carried out a systematic review of literature searched within five major databases. The search identified 16 published qualitative research studies on the topic of mandatory personal psychotherapy that matched the inclusion criteria. All studies were rated for quality. The findings from individual studies were thematically analysed through a process of meta-synthesis. Results: Meta-synthesis showed studies on mandatory psychotherapy had reported both positive and hindering factors in almost equal number. Six main themes were identified: three positive and three negative. Positive findings were related to personal and professional development, experiential learning and therapeutic benefits. Negative findings related to ethical imperatives do no harm, justice and integrity. Conclusion: When mandatory personal psychotherapy is used within a training programme, courses must consider carefully and put ethical issues at the forefront of decision-making. Additionally, the requirement of mandatory psychotherapy should be positioned and identified as an experiential pedagogical device rather than fulfilling a curative function. Recommendations for further research are made

    Kids Run the World SHP

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    The Boys & Girls Club services children ages 6 to 18 with programs and activities that emphasize development strategies (BGCA, n.d.). It provides role models, a safe environment, and constructive activities that focus on overall health. The club depends heavily on community engagement in the form of donors, partnerships, and volunteers (BGCA, n.d.). Our local club provided programs focusing on financial responsibility, leadership, and mental health, but lacked development of physical health practices. Kids Run the World comprised various activities to promote physical health in adolescents. This program is led by college level volunteers that worked with elementary and middle school-aged children to show them fun and safe ways to exercise. Before implementation of the program, research was completed to understand the dynamics of the local Boys & Girls Club. This research included how to be an effective role model and successes of similar programs. This is when “Kid Run the World� was established and put into action. After volunteering at the Boys & Girls Club throughout the duration of our project, we have observed increased physical activity levels and overall morale when group members and athletes are there leading activities. This was successful because of consistent attendance and positive interactions with the children. We learned we needed to have a youthful perspective and engage the kids with exercises they found familiar. Despite COVID-19, our group continues to make efforts to engage youth through our organization on campus, Kids Run the World. The Boys & Girls Club has many underserved children, and this has provided our group with a unique platform that has benefited both us and the children through increased physical activity levels and community involvement

    Trial protocol for the Building Resilience through Socio-Emotional Training (ReSET) programme: a cluster randomised controlled trial of a new transdiagnostic preventative intervention for adolescents

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    Background Adolescence is a period of heightened vulnerability to developing mental health problems, and rates of mental health disorder in this age group have increased in the last decade. Preventing mental health problems developing before they become entrenched, particularly in adolescents who are at high risk, is an important research and clinical target. Here, we report the protocol for the trial of the ‘Building Resilience through Socioemotional Training’ (ReSET) intervention. ReSET is a new, preventative intervention that incorporates individual-based emotional training techniques and group-based social and communication skills training. We take a transdiagnostic approach, focusing on emotion processing and social mechanisms implicated in the onset and maintenance of various forms of psychopathology. Methods A cluster randomised allocation design is adopted with randomisation at the school year level. Five-hundred and forty adolescents (aged 12–14) will be randomised to either receive the intervention or not (passive control). The intervention is comprised of weekly sessions over an 8-week period, supplemented by two individual sessions. The primary outcomes, psychopathology symptoms and mental wellbeing, will be assessed pre- and post-intervention, and at a 1-year follow-up. Secondary outcomes are task-based assessments of emotion processing, social network data based on peer nominations, and subjective ratings of social relationships. These measures will be taken at baseline, post-intervention and 1-year follow-up. A subgroup of participants and stakeholders will be invited to take part in focus groups to assess the acceptability of the intervention. Discussion This project adopts a theory-based approach to the development of a new intervention designed to target the close connections between young people’s emotions and their interpersonal relationships. By embedding the intervention within a school setting and using a cluster-randomised design, we aim to develop and test a feasible, scalable intervention to prevent the onset of psychopathology in adolescence. Trial registration ISRCTN88585916. Trial registration date: 20/04/2023

    Thermal characterization testing of a robust and reliable thermal knife HDRM (Hold Down and Release Mechanism) for CubeSat deployables

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    Thermal knife HDRMs (Hold Down and Release Mechanisms) are commonly used in CubeSats and other small satellites. However, detailed information on proven designs is difficult to find. Design of a robust and reliable mechanism can present technical challenges which may only become apparent during testing, and often only when tested in a space representative environment. A custom thermal knife HDRM was designed and built for the antenna deployment module of EIRSAT-1 to deploy four coil spring antenna elements, but the same or a similar design could be repurposed quite easily to release a wide range of CubeSat deployables. In this design resistors are used to cut dyneema lines. For robustness and reliability, the thermal response of the mechanism must be well understood. To reach the melting point of the dyneema (150C) the power dissipated in the resistors must often exceed the maximum rated value. Therefore, choosing the operating current and the burn time is a careful trade-off between ensuring that the resistor reliably cuts the dyneema line and ensuring that the resistor, solder joints, PCB and nearby components are not damaged by the high temperatures. These choices are further complicated by the requirement that the mechanism operates over a range of temperatures. A thermal vacuum test campaign was carried out to better understand and characterise the thermal behaviour of the EIRSAT-1 mechanism. For the test a model of the mechanism was built with several temperature sensors installed. Two of these sensors were installed directly on the body of the resistors using a thermally conductive epoxy. Burn tests were performed in vacuum at temperatures between -37C and +56C. The test shows many interesting results including the effect of the dyneema lines on the thermal response, the possibility of desoldering the burn resistors and a comparison between the performance at ambient and vacuum conditions. Finally, a summary is given of the key technical challenges associated with this type of mechanism along with some recommendations to help make future designs more robust and reliable

    Update on the status of the Educational Irish Research Satellite (EIRSAT-1)

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    The Educational Irish Research Satellite, EIRSAT-1, is a 2U CubeSat being implemented by a student-led team at University College Dublin, as part of the 2nd round of the European Space Agency’s Fly Your Satellite! programme. In development since 2017, the mission has several scientific, technological and outreach goals. It will fly an in-house developed antenna deployment module, along with three custom payloads, which are integrated with commercial off-the-shelf subsystems. In preparation for the flight model, a full-system engineering qualification model of the spacecraft has undergone an extensive period of test campaigns, including full functional tests, a mission test, and environmental testing at the European Space Agency’s CubeSat Support Facility in Redu, Belgium. Beyond the technical, educational, and capacity-building goals of the mission, EIRSAT-1 aims to inspire wider study of STEM subjects, while highlighting the importance of multidisciplinary teams and creating greater awareness of space in everyday life. A wide range of outreach activities are being undertaken to realise these aims. This paper provides a status update on key aspects of the EIRSAT-1 project and the next steps towards launc

    An integrated primary care-based programme of PRE-Pregnancy cARE to improve pregnancy outcomes in women with type 2 Diabetes (The PREPARED study): protocol for a multi-method study of implementation, system adaptation and performance

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    Background: The number of women of childbearing age with Type 2 diabetes(T2DM) is increasing, and they now account for > 50% of pregnancies in women with pre-existing diabetes. Diabetes pregnancies without adequate pre-pregnancy care have higher risk for poor outcomes (miscarriages, birth-defects, stillbirths) and are associated with increased complications (caesarean deliveries, macrosomic babies, neonatal intensive-care admissions). The risks and costs of these pregnancies can be reduced with pregnancy preparation (HbA1c, ≤ 6.5%, 5 mg folic acid and stopping potentially harmful medicines). However, 90% of women with T2DM, most of whom are based in primary care, are not adequately prepared for pregnancy. This study will evaluate a programme of primary care-based interventions (decision-support systems; pre-pregnancy care-pathways; pregnancy-awareness resources; professional training; and performance monitoring) to improve pregnancy preparation in women with T2DM. Methods: The study aims to optimise the programme interventions and estimate their impact on pregnancy preparation, pre-pregnancy care uptake and pregnancy outcomes. To evaluate this multimodal intervention, we will use a multi-method research design following Complex Adaptive Systems (CAS) theory, refining the interventions iteratively during the study. Thirty GP practices with ≥ 25 women with T2DM of reproductive age (18–45 years) from two South London boroughs will be exposed to the intervention. This will provide > 750 women with an estimated pregnancy incidence of 80–100 to study. The research involves: a clinical audit of processes and outcomes; a process evaluation informing intervention feasibility, implementation, and behaviour change; and a cost-consequences analysis informing future economic evaluation. Performance data will be collected via audits of GP systems, hospital antenatal clinics and pregnancy outcomes. Following CAS theory, we will use repeated measurements to monitor intervention impact on pregnancy preparation markers at 4-monthly intervals over 18-months. We will use performance and feasibility data to optimise intervention effects iteratively. The target performance for the intervention is a 30% increase in the proportion of women meeting pre-pregnancy care criteria. Discussion: The primary output will be development of an integrated programme of interventions to improve pregnancy preparation, pre-pregnancy care uptake, and reduce adverse pregnancy outcomes in women with T2DM. We will also develop an implementation plan to support the introduction of the interventions across the NHS

    Survive and thrive: transforming care for every small and sick newborn

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    Transforming hospital care for 30 million vulnerable newborns, who are currently being left behind, is a smart investment which will unlock substantial human capital. Achieving the Sustainable Development Goals (SDGs), including universal health coverage (UHC), by 2030 requires action now to provide care for all small and sick newborns. Survive and thrive: transforming care for every small and sick newborn, focuses on the world’s most vulnerable newborns. It outlines the global problem, showcases progress, summarizes what can be done to transform inpatient care for small and sick newborns, and demonstrates the importance of data to guide investment and improve quality and equity. The report contributes to achieving the objectives set out in The global strategy for women’s, children’s and adolescents’ health (2016–2030) and builds on the momentum of Every newborn: an action plan to end preventable deaths. It presents a clear call to action to accelerate progress towards the SDGs to ensure every newborn has the chance to live a healthy and productive life
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