737 research outputs found

    Observational advances in estimates of oceanic heating

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    Since the early twenty-first century, improvements in understanding climate variability resulted from the growth of the ocean observing system. The potential for a closure of the Earth’s energy budget has emerged with the unprecedented coverage of Argo profiling floats, which now provide a decade (2006–2015) of invaluable information on ocean heat content changes above 2000 m. The expertise gained from Argo and repeat hydrography sections motivated the extension of the array toward the ocean bottom, which will progressively reveal the poorly known deep ocean and reduce the uncertainty of its presumed 10–15 % contribution to the global ocean warming trend of 0.65–0.80 W m−2. The sustainability and synergy of various observing systems helped to corroborate numerical models and decipher the internal variability of distinct ocean basins. Due to unique observations of the circulation in the North Atlantic, particular attention is paid to heat content changes and their relationship to dynamic variability in that region

    Associations between Family Maltreatment Perpetration and Latent Profiles of Personal and Family Strengths among Active-Duty Air Force Members

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    Although individual and family strengths have been found to impact family maltreatment risk, optimal approaches to their assessment are lacking. To substantiate the utility of holistically assessing multiple strengths among active-duty Air Force members (i.e., Airmen) who might be at risk of perpetrating family maltreatment, the current study aimed to identify latent patterns of personal and family strengths among Airmen and assess associations with family maltreatment perpetration. A representative a sample of 30,187 Airmen from the 2011 Air Force Community Assessment Survey was used to identify patterns across latent-factor scores representing unit leader support, informal support, family functioning, individual fitness, and personal resilience. Latent profile analysis was conducted to extract an optimal number of response patterns and estimate associations with family maltreatment perpetration. A five-profile solution was optimal, representing patterns marked by low (10%), below average (26%), mixed (16%), above average (36%), and high (12%) levels of personal and family strengths. Predicted probabilities of family maltreatment among families not identifying as stepfamilies were 39%, 21%, 14%, 10%, and 8% across low, below average, mixed, above average, and high patterns, respectively. Among stepfamilies (20% of sample), predicted probabilities were 49%, 29%, 21%, 15%, and 12%, respectively. Findings encourage a holistic assessment of personal and family strengths among Airmen. The Personal and Family Strengths Inventory, which was developed to gauge these strengths, can position practitioners well to engage Airmen in conversations around strengths and growth opportunities for the purposes of service planning aimed at preventing family maltreatment

    Fear information and social phobic beliefs in children: a prospective paradigm and preliminary results

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    This paper presents a first attempt to develop a prospective paradigm to test Rachman’s (Behav. Res. Ther. 15 (1977) 375) theory of fear acquisition for social fears. Following the prospective paradigm for animal fears developed by Field et al. (Behav. Res. Ther. 39 (2001) 1259) an attempt is made to adapt this paradigm to look at the effect of fear information in the development of social fears. A large group of normal children (N=135)who were at an age (10–13 years) at which social concerns are most pertinent were tested using this paradigm. They were given positive, negative or neutral information about three social situations: public speaking, eating in public, and meeting a new group of children. Children’s fear beliefs were measured before and after the information was given and the information was given by a teacher, a same age peer or no information was given (a control). The results indicate that although information can change social fear beliefs it is dependent upon the type of social activity and who provides the information. The implications of these initial results for our understanding of both the role of fear information in the development of social fear beliefs, and the limitations of this current paradigm are discussed

    Pre-main-sequence Lithium Depletion

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    In this review I briefly discuss the theory of pre-main-sequence (PMS) Li depletion in low-mass (0.075<M<1.2 Msun) stars and highlight those uncertain parameters which lead to substantial differences in model predictions. I then summarise observations of PMS stars in very young open clusters, clusters that have just reached the ZAMS and briefly highlight recent developments in the observation of Li in very low-mass PMS stars.Comment: 8 pages, invited review at "Chemical abundances and mixing in stars in the Milky Way and its satellites", eds. L. Pasquini, S. Randich. ESO Astrophysics Symposium (Springer-Verlag

    A Real-Space Full Multigrid study of the fragmentation of Li11+ clusters

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    We have studied the fragmentation of Li11+ clusters into the two experimentally observed products (Li9+,Li2) and (Li10+,Li) The ground state structures for the two fragmentation channels are found by Molecular Dynamics Simulated Annealing in the framework of Local Density Functional theory. Energetics considerations suggest that the fragmentation process is dominated by non-equilibrium processes. We use a real-space approach to solve the Kohn-Sham problem, where the Laplacian operator is discretized according to the Mehrstellen scheme, and take advantage of a Full MultiGrid (FMG) strategy to accelerate convergence. When applied to isolated clusters we find our FMG method to be more efficient than state-of-the-art plane wave calculations.Comment: 9 pages + 6 Figures (in gzipped tar file

    A systematic review of physical activity promotion strategies

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    This article was first published in:British Journal of Sports Medicine:1996:30:84-89We have reviewed randomised controlled trials of physical activity promotion to provide recent and reliable information on the effectiveness of physical activity promotion. Computerised databases and references of references were searched. Experts were contacted and asked for information about existing work. Studies assessed were randomised controlled trials of healthy, free living, adult subjects, where exercise behaviour was the dependent variable. Eleven trials were identified. No United Kingdom based studies were found. Interventions that encourage walking and do not require attendance at a facility are most likely to lead to sustainable increases in overall physical activity. Brisk walking has the greatest potential for increasing overall activity levels of a sedentary population and meeting current public health recommendations. The small number of trials limits the strength of any conclusions and highlights the need for more research

    Development of a model for integrated care at the end of life in advanced dementia: A whole systems UK-wide approach

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    yesBackground: The prevalence of dementia is rising worldwide and many people will die with the disease. Symptoms towards the end of life may be inadequately managed and informal and professional carers poorly supported. There are few evidence-based interventions to improve end-of-life care in advanced dementia. Aim: To develop an integrated, whole systems, evidence-based intervention that is pragmatic and feasible to improve end-of-life care for people with advanced dementia and support those close to them. Design: A realist-based approach in which qualitative and quantitative data assisted the development of statements. These were incorporated into the RAND/UCLA appropriateness method to achieve consensus on intervention components. Components were mapped to underlying theory of whole systems change and the intervention described in a detailed manual. Setting/participants: Data were collected from people with dementia, carers and health and social care professionals in England, from expert opinion and existing literature. Professional stakeholders in all four countries of the United Kingdom contributed to the RAND/UCLA appropriateness method process. Results: A total of 29 statements were agreed and mapped to individual, group, organisational and economic/political levels of healthcare systems. The resulting main intervention components are as follows: (1) influencing local service organisation through facilitation of integrated multi-disciplinary care, (2) providing training and support for formal and informal carers and (3) influencing local healthcare commissioning and priorities of service providers. Conclusion: Use of in-depth data, consensus methods and theoretical understanding of the intervention components produced an evidence-based intervention for further testing in end-of-life care in advanced dementia

    Non-perturbative renormalization of three-quark operators

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    High luminosity accelerators have greatly increased the interest in semi-exclusive and exclusive reactions involving nucleons. The relevant theoretical information is contained in the nucleon wavefunction and can be parametrized by moments of the nucleon distribution amplitudes, which in turn are linked to matrix elements of local three-quark operators. These can be calculated from first principles in lattice QCD. Defining an RI-MOM renormalization scheme, we renormalize three-quark operators corresponding to low moments non-perturbatively and take special care of the operator mixing. After performing a scheme matching and a conversion of the renormalization scale we quote our final results in the MSbar scheme at mu=2 GeV.Comment: 49 pages, 3 figure
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