575 research outputs found

    Mind Over Matter: A Qualitative Examination of the Coping Resources Used by Women with Cancer

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    Aim: This exploratory study investigates the coping resources used by six women diagnosed with cancer. Objective: The purpose of this study was to provide these women with the opportunity to discuss their cancer experiences along with the specific coping methods they found to be helpful throughout their journey. Methods: The participants, ranging in age from 25 to 63, completed a background questionnaire, followed by either a semi-structured interview (n=3) or an interview via written response (n=3). Results: Several key coping methods were described as being helpful to these women, and these methods fell into three major categories: intrapersonal, interpersonal, and extrapersonal coping resources. Although each of these resource categories had a direct influence on overall well-being itself, the interpersonal and extrapersonal resources also influenced the intrapersonal category, offering an alternate means by which they could influence overall well-being. These findings highlight the many coping resources used by these women when navigating their cancer journey

    Relationship between Hard and Soft X-ray Emission Components of a Solar Flare

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    X-ray observations of solar flares routinely reveal an impulsive high-energy and a gradual low-energy emission component, whose relationship is one of the key issues of solar flare study. The gradual and impulsive emission components are believed to be associated with, respectively, the thermal and nonthermal components identified in spectral fitting. In this paper, a prominent about 50 second hard X-ray (HXR) pulse of a simple GOES class C7.5 flare on 20 February 2002 is used to study the association between high energy, non-thermal and impulsive evolution, and low energy, thermal and gradual evolution. We use regularized methods to obtain time derivatives of photon fluxes to quantify the time evolution as a function of photon energy, obtaining a break energy between impulsive and gradual behavior. These break energies are consistent with a constant value of about 11 keV in agreement with those found spectroscopically between thermal and non-thermal components, but the relative errors of the former are greater than 15% and much greater than the a few percent errors found from the spectral fitting. These errors only weakly depend on assuming an underlying spectral model for the photons, pointing to the current data being inadequate to reduce the uncertainties rather than there being a problem associated with an assumed model. The time derivative method is used to test for the presence of a 'pivot energy' in this flare. Although these pivot energies are marginally consistent with a constant value of about 9 keV, its values in the HXR rise phase appear to be lower than those in the decay phase

    Hard X-ray footpoint sizes and positions as diagnostics of flare accelerated energetic electrons in the low solar atmosphere

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    The hard X-ray (HXR) emission in solar flares comes almost exclusively from a very small part of the flaring region, the footpoints of magnetic loops. Using RHESSI observations of solar flare footpoints, we determine the radial positions and sizes of footpoints as a function of energy in six near-limb events to investigate the transport of flare accelerated electrons and the properties of the chromosphere. HXR visibility forward fitting allows to find the positions/heights and the sizes of HXR footpoints along and perpendicular to the magnetic field of the flaring loop at different energies in the HXR range. We show that in half of the analyzed events, a clear trend of decreasing height of the sources with energy is found. Assuming collisional thick-target transport, HXR sources are located between 600 and 1200 km above the photosphere for photon energies between 120 and 25 keV respectively. In the other events, the position as a function of energy is constant within the uncertainties. The vertical sizes (along the path of electron propagation) range from 1.3 to 8 arcseconds which is up to a factor 4 larger than predicted by the thick-target model even in events where the positions/heights of HXR sources are consistent with the collisional thick-target model. Magnetic mirroring, collisional pitch angle scattering and X-ray albedo are discussed as potential explanations of the findings.Comment: 10 pages, 8 figures, accepted for publication in Ap

    The Dark Side of Top Level Sport: An Autobiographic Study of Depressive Experiences in Elite Sport Performers

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    The general and sport psychology research converge to point to a complex relationship between depressive experiences and human performance. The purpose of this study was to explore the depressive experiences of top level athletes and the relationship of such experiences with sport performance. Twelve autobiographies of elite athletes representing eight sports were analyzed. The autobiographical analysis was informed by narrative tradition, using three types of narrative analysis: categorical content, categorical form, and holistic content. The analysis revealed a temporal aspect to the depressive experiences that the athletes reported. Initially, sport represented a form of escape from the depressive symptoms which had been exacerbated by both external stressors (e.g., experiencing bereavement) and internal stressors (e.g., low self-esteem). However, in time, the athletes typically reached a stage when the demands of their sport shifted from being facilitative to being debilitative in nature with an intensification of their depressive symptoms. This was accompanied by deliberations about continuing their engagement in sport and an acceptance that they could no longer escape from their symptoms, with or without sport. The findings extend the extant literature by suggesting a reciprocal relationship between depressive experiences and sport performance, and they support the general psychology literature relating to the negative impact of depression on performance. The applied implications of these findings are discussed emphasizing the importance of early identification of depressive symptoms and the adoption of a proactive approach in the prevention and management of symptoms

    Observations of Reconnection Flows in a Flare on the Solar Disk

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    Magnetic reconnection is a well-accepted part of the theory of solar eruptive events, though the evidence is still circumstantial. Intrinsic to the reconnection picture of a solar eruptive event, particularly in the standard model for two-ribbon flares ("CSHKP" model), are an advective flow of magnetized plasma into the reconnection region, expansion of field above the reconnection region as a flux rope erupts, retraction of heated post-reconnection loops, and downflows of cooling plasma along those loops. We report on a unique set of SDO/AIA imaging and Hinode/EIS spectroscopic observations of the disk flare SOL2016-03-23T03:54 in which all four flows are present simultaneously. This includes spectroscopic evidence for a plasma upflow in association with large-scale expanding closed inflow field. The reconnection inflows are symmetric, and consistent with fast reconnection, and the post-reconnection loops show a clear cooling and deceleration as they retract. Observations of coronal reconnection flows are still rare, and most events are observed at the solar limb, obscured by complex foregrounds, making their relationship to the flare ribbons, cusp field and arcades formed in the lower atmosphere difficult to interpret. The disk location and favorable perspective of this event have removed these ambiguities giving a clear picture of the reconnection dynamics.Comment: 9 pages, 5 figures, and 1 table. Accepted for publication in ApJ

    Visual impairment from cataract and health related quality of life: results from a case-control study in the Philippines.

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    PURPOSE: To evaluate a vision related quality of life (VRQoL) scale, the World Health Organization Prevention of Blindness and Deafness Visual Function-20 (WHO/ PBD VF20) and describe the relationship between visual impairment from cataract and vision related and generic Health Related Quality of Life (HRQoL) in a case-control study of adults aged > or = 50 years in the Philippines. METHODS: Two hundred and thirty eight population based persons visually impaired from cataract and 163 age- gender- matched controls with normal vision were interviewed using the WHO/PBD VF20 and European Quality of Life (EuroQol) questionnaire (an HRQoL). The WHO/PBD VF20 was evaluated using standard psychometric tests. RESULTS: The WHO/PBD VF20 had good item acceptability and validity. Cases had significantly poorer VRQoL than controls and worsening Visual Acuity (VA) was associated with worsening VRQoL. The general functioning subscale had good internal consistency. The psychosocial sub-scale had a Cronbach's alpha of 0.61, just below the generally accepted criteria of 0.70. Cases were much more likely than controls to report problems with the Euroqol five descriptive domains (EQ-5D)and had significantly poorer self-rated health. CONCLUSIONS: The study supports the use of the WHO/PBD VF20 in a Philippine population and highlights the worsening VRQoL associated with cataract vision loss. The poorer generic HRQoL among cases compared to controls indicates an impact of visual impairment on perceived health and well-being, beyond vision-specific experience

    Problematising Home-based Care for Children with Cancer

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    Background and Literature Review This study explores issues around home-based care for children with cancer. Current policy tends to promote home-based care for children with cancer; this project seeks to interrogate that approach further and to explore the evidence base for this policy direction. The literature review is structured around key themes and demonstrates the gap in the evidence from health care professionals‘ perspectives and UK based research Methodology I adopt a qualitative approach to carry out in-depth and semi-structured interviews with a sample of 10 nursing staff that deliver care to children in the community, in hospital or between the two. Findings Thematic analysis is used to sort the data into three key themes relating to treating children with cancer at home: Maintaining normality during treatment Support the child and their family require at home Safety considerations for treating a child with cancer at home The findings are then discussed in relation to the literature on the subjects to draw conclusions about what the findings mean for nursing practice. Recommendations and Conclusion My findings suggest that the policy direction to promote home-care is appropriate as the best option for children with cancer but there need to be protocols in place to aid the individual decision about where to treat the individual child. The findings demonstrated the increase in community provisions indicating support of home-care but standards need to be set across the country to ensure everywhere has adequate staffing levels in place. Support for families helps maintain normality at home, aids safe home-care and is the key to increasing the availability of more treatments available at home in the future

    Bioassay complexities – exploring challenges in aquatic chemosensory research

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    Chemosensory science, the study of how organisms produce and assess olfactory information is central to our understanding of how organisms interact and gain information about their environment. Signalling cue identification in aquatic systems lags our knowledge in terrestrial insects due to analytical challenges in aqueous environments. Unambiguous, reliable, and fast behavioural assays to evaluate the biological activity and function of a chemosensory cue are critical to understand aquatic signalling systems and enable research into their ecology, evolution, and threats in a changing environment. Yet, a range of anthropomorphic assumptions made in this research field create additional challenges to interpret data generated. Here we evaluate common challenges including assumed readiness of individuals to respond, lack of information on the animals’ physiological and social status, their pre-experimental cue exposure, the innate or learned character of the responses, the animals’ acclimation and habituation status, and the impact of the animals upon their own environment. These factors lead to significant variability in animals’ responses in bioassays, both in the field and in laboratory setups. In the light of our limited knowledge of aquatic chemosensory cues’ chemical structure, active concentrations in samples, and undetermined response thresholds, we evaluate methods of mitigation to minimise differences between studies. We conclude that currently it is nearly impossible to compare results from chemosensory behavioural studies undertaken in different ecosystems, laboratories, and timepoints. There is an urgent need for standardisation of behavioural methods, recording of environmental conditions, individuals’ physiology, physical and social status, to avoid conflicting and contradicting results when comparing studies. Including these parameters in experimental design and data interpretation will provide a deeper understanding of chemosensory communication, reduce unconscious bias in studies and can help to explain the substantial individuality in animals’ responses to chemosensory cues and their acclimation to environmental stress

    The dark side of top level sport: an autobiographic study of depressive experiences in elite sport performers

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    The general and sport psychology research converge to point to a complex relationship between depressive experiences and human performance. The purpose of this study was to explore the depressive experiences of top level athletes and the relationship of such experiences with sport performance. Twelve autobiographies of elite athletes representing eight sports were analyzed. The autobiographical analysis was informed by narrative tradition, using three types of narrative analysis: categorical content, categorical form, and holistic content. The analysis revealed a temporal aspect to the depressive experiences that the athletes reported. Initially, sport represented a form of escape from the depressive symptoms which had been exacerbated by both external stressors (e.g., experiencing bereavement) and internal stressors (e.g., low self esteem). However, in time, the athletes typically reached a stage when the demands of their sport shifted from being facilitative to being debilitative in nature with an intensification of their depressive symptoms. This was accompanied by deliberations about continuing their engagement in sport and an acceptance that they could no longer escape from their symptoms, with or without sport. The findings extend the extant literature by suggesting a reciprocal relationship between depressive experiences and sport performance, and they support the general psychology literature relating to the negative impact of depression on performance. The applied implications of these findings are discussed emphasizing the importance of early identification of depressive symptoms and the adoption of a proactive approach in the prevention and management of symptoms

    Predictors of physical activity and sedentary behaviours among 11-16 year olds: Multilevel analysis of the 2013 Health Behaviour in School-aged Children (HBSC) study in Wales

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    Background The present study investigated associations between individual- and school-level predictors and young people’s self-reported physical activity (total activity and moderate-to-vigorous activity) and sedentary behaviours. Methods Individual-level data provided by the 2013/14 cross-sectional survey ‘Health Behaviour in School-aged Children (HBSC) study in Wales’ were linked to school-level data within the ‘HBSC School Environment Questionnaire’. The final sample comprised 7,376 young people aged 11-16 years across 67 schools. Multilevel modelling was used to examine predictors of total physical activity, moderate-to-vigorous physical activity (MVPA) and sedentary behaviours (screen-based behaviours). Results Taking more physical activity (less than 5 days vs. 5 or more days per week), engaging in higher levels of MVPA (less than 4 hours vs. 4 or more hours per week) and reporting 2 or less hours of sedentary time were predicted by several individual level variables. Active travel to school positively predicted high levels of physical activity, however, gender stratified models revealed active travel as a predictor amongst girls only (OR:1.25 (95 % CI:1.05 - 1.49)). No school-level factors were shown to predict physical activity levels, however, a lower school socio-economic status was associated with a higher level of MVPA (OR:1.02 (95 % CI:1.01 - 1.03)) and a lower risk of sedentary behaviour (OR:0.97 (95 % CI:0.96 – 0.99)). A shorter lunch break (OR:1.33 (95 % CI:1.11 - 1.49)) and greater provision of facilities (OR:1.02 (95 % CI:1.00 - 1.05)) were associated with increased sedentary activity. Gender stratified models revealed that PE lesson duration (OR:1.18 (95 % CI:1.01 - 1.37)) and the provision of sports facilities (OR:1.03 (95 % CI:1.00 - 1.06)) were predictors of boy’s sedentary behaviours only. Conclusion Shorter lunch breaks were associated with increased sedentary time. Therefore, while further research is needed to better understand the causal nature of this association, extending lunch breaks could have a positive impact on sedentary behaviour through the provision of more time for physical activity. The findings also suggest that active travel could offer a mechanism for increasing physical activity levels particularly amongst girls. Particularly, the design and evaluation of interventions to promote physical activity during school hours should employ a comprehensive approach, including a focus on school policies and behaviours both in and out of school hours. Keywords Physical activity – Sedentary behaviour – Active travel – School – Policy – Environmen
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