4,692 research outputs found

    On the spatial evolution of long-wavelength Goertler vortices governed by a viscous-inviscid interaction

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    The generation of long-wavelength, viscous-inviscid interactive Goertler vortices is studied in the linear regime by numerically solving the time-dependent governing equations. It is found that time-dependent surface deformations, which assume a fixed nonzero shape at large times, generate steady Goertler vortices that amplify in the downstream direction. Thus, the Goertler instability in this regime is shown to be convective in nature, contrary to the earlier findings of Ruban and Savenkov. The disturbance pattern created by steady and streamwise-elongated surface obstacles on a concave surface is examined in detail, and also contrasted with the flow pattern due to roughness elements with aspect ratio of order unity on flat surfaces. Finally, the applicability of the Briggs-Bers criterion to unstable physical systems of this type is questioned by providing a counterexample in the form of the inviscid limit of interactive Goertler vortices

    Wake-up Call of Terrorism

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    Psychological type and attitude towards Celtic Christianity among committed Churchgoers in the United Kingdom: an empirical study

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    This article takes the burgeoning interest in Celtic Christianity as a key example of the way in which churches may be responding to the changing spiritual and religious landscape in the United Kingdom today and examines the power of psychological type theory to account for variation in the attitude of committed churchgoers to this innovation. Data provided by a sample of 248 Anglican clergy and lay church officers (who completed the Francis Psychological Type Scales together with the Attitude toward Celtic Christianity Scale) demonstrated that intuitive types, feeling types, and perceiving types reported a more positive attitude towards Celtic Christianity than sensing types, thinking types, and judging types. These findings are interpreted to analyse the appeal of Celtic Christianity and to suggest why some committed churchgoers may find this innovation less attractive

    Navigating stormy waters in times of fiscal uncertainty: mitigating the challenges

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    New approaches to resource allocation are providing healthcare managers with ways to meet budget pressures while maximizing benefit to patients and populations. But putting these approaches in place often involves significant organizational change to which some degree of resistance must be expected. The authors have seen seven common objections raised time and again. Here, we offer our best advice on how healthcare leaders can anticipate and respond proactively to these challenges. </jats:p

    Youth and Family Based In-Home Services Program in Tennessee: Factors for Success

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    Intensive in-home services is a family-centered, strength-based intervention program offering comprehensive treatment that includes family therapy, mental health treatment and parenting skills for caregivers, development of positive social systems, and assistance with accessing community resources for long-term support (Youth Villages, 2013b). Framed on family system theory, Intensive-In Home Services (IIHS) was developed from Cognitive Behavioral Therapy, Functional Family Therapy, Social Development, and Crisis Intervention models as a means to modify behaviors that place youth at risk for out-of-home placement. The socio-historical development of these models is examined in the literature review. Intensive in-home services is a family-centered, strength-based intervention program offering comprehensive treatment that includes family therapy, mental health treatment and parenting skills for caregivers, development of positive social systems, and assistance with accessing community resources for long-term support (Youth Villages, 2013b). Framed on family system theory, Intensive-In Home Services (IIHS) was developed from Cognitive Behavioral Therapy, Functional Family Therapy, Social Development, and Crisis Intervention models as a means to modify behaviors that place youth at risk for out-of-home placement. The socio-historical development of these models is examined in the literature review. The purpose of this study was to evaluate predictors that may influence outcome measures of a youth’s inclination to remain in the home after having received IIHS treatment. The significant predictors were determined to be age, race, and total length of service received. The study sampled 3,131 youth ages birth through 17 who received IIHS services in Tennessee over a 10-year period and were discharged from July 2001 to July 2010. The study was limited to youth designated under Comprehensive Child and Family Treatment (CCFT), which is classified as part of TennCare coverage. The primary goal of CCFT is to empower families to monitor and manage mental health needs and high-risk youth behaviors in order to provide permanency and longterm stability in the natural home environment (UnitedHealthcare, 2012)

    ECONOMIC THRESHOLDS UNDER UNCERTAINTY WITH APPLICATION TO CORN NEMATODE MANAGEMENT

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    An economic threshold of agricultural pest management is derived. Results provide a method for researchers to use in making improved pest control recommendations to farmers without farm level decision-making. An empirical illustration for lesion nematode management in irrigated corn is given and directions for further research are indicated.Crop Production/Industries, Risk and Uncertainty,

    Measuring eudaimonic wellbeing in sport: Validation of the Eudaimonic Wellbeing in Sport Scale

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    The purpose of this study was to create and validate a sport-specific eudaimonic wellbeing measure (EWBSS; Eudaimonic Wellbeing in Sport Scale) and included three phases.  In Phase 1, an initial pool of 19 items was developed and five items were selected by five experts to represent eudaimonic wellbeing in sport (EWBSS).  Four hundred athletes (Mage = 24.32, SD = 6.69) from various individual and team sports participated in Phase 2.  Factorial validity and reliability scores were examined using confirmatory factor analysis and alpha coefficient calculations.  Results indicated initial evidence for both factorial validity and internal consistency of the EWBSS.  In Phase 3, further psychometric testing of the EWBSS with two independent samples (i.e., competitive and recreational athletes) ensued.  The findings provided further evidence of sound validity and reliability scores of the EWBSS in competitive athletes.  Partial support for the psychometric properties of the EWBSS was provided in recreational athletes.  As the validation of an instrument is an ongoing process, more research is needed to further evaluate the validity of the EWBSS
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