50 research outputs found

    Radar climatology of the COPS region

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    A climatology of convection initiation (CI) and convective enhancements (CE) has been developed using radar reflectivity data in southwestern Germany and eastern France over the period of May�August of 2000�2006 and 2008. The study region included the Vosges Mountains of France, the Rhine Valley which straddles France and Germany, the Black ForestMountains and the SwabianMountains of Germany. Convection occurred frequently during the summer months throughout the study region. The CI density (number of initiations per square km) illustrates preferential formation in the mountain regions while the CE events spanned both mountains and valleys nearly equally. There is a strongmid-day peak of the CI events suggesting that diurnal heating is critical for CI in the region. The very strong thunderstorms (>46 dBZ) first occurred in the mountains and �2 h later in the Rhine Valley. During the summer of 2007, the Convective and Orographically-induced Precipitation Study (COPS) field campaign was conducted with the objective of obtaining improved understanding of convective processes and short-term quantitative precipitation forecasting in low-mountain regions. Comparisons were made between the radar climatology results and the COPS summer. The COPS summer exhibited preferential CI density in the mountainous regions but not as pronounced as the climatology. The COPS summer had a similar diurnal peak of CI events as climatology but the ratio of daytime to nighttime CI (1.7), or amplitude of the diurnal cycle, was less than that of climatology (3.0). While both the 8-year climatology and COPS summer were dominated by daytime, locally-forced CI occurrences, the broad distribution of daytime CI events and increase in nighttime events observed during COPS indicate a more active synoptic pattern in 2007

    Brief Report: Long‐Term Functional Engraftment of Mesenchymal Progenitor Cells in a Mouse Model of Accelerated Aging

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    Age‐related osteoporosis is characterized by a decrease in bone‐forming capacity mediated by defects in the number and function of osteoblasts. An important cellular mechanism that may in part explain osteoblast dysfunction that occurs with aging is senescence of mesenchymal progenitor cells (MPCs). In the telomere‐based Wrn −/− Terc −/− model of accelerated aging, the osteoporotic phenotype of these mice is also associated with a major decline in MPC differentiation into osteoblasts. To investigate the role of MPC aging as a cell‐autonomous mechanism in senile bone loss, transplantation of young wild‐type whole bone marrow into Wrn −/− Terc −/− mutants was performed and the ability of engrafted cells to differentiate into cells of the osteoblast lineage was assessed. We found that whole bone marrow transplantation in Wrn −/− Terc −/− mice resulted in functional engraftment of MPCs up to 42 weeks, which was accompanied by a survival advantage as well as delays in microarchitectural features of skeletal aging. S TEM C ELLS 2013;31:607–611Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/96667/1/sc-12-0760_sm_SupplFigure1.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/96667/2/1294_ftp.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/96667/3/sc-12-0760_sm_SupplFigure2.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/96667/4/sc-12-0760_sm_SupplFigure3.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/96667/5/sc-12-0760_sm_SupplInform.pd

    V1647 Orionis: One Year into Quiescence

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    We present new optical, near-IR, and mid-IR observations of the young eruptive variable star V1647 Orionis that went into outburst in late 2004 for approximately two years. Our observations were taken one year after the star had faded to its pre-outburst optical brightness and show that V1647Ori is still actively accreting circumstellar material. We compare and contrast these data with existing observations of the source from both pre-outburst and outburst phases. From near-IR spectroscopy we identify photospheric absorption features for the first time that allow us to constrain the classification of the young star itself. Our best fit spectral type is M0+-2 sub-classes with a visual extinction of 19+-2 magnitudes and a K-band veiling of rK~1.5+-0.2. We estimate that V1647Ori has a quiescent bolometric luminosity of ~9.5Lsun and a mass accretion rate of ~1.10^-6Msun yr^-1. Our derived mass and age, from comparison with evolutionary models, are 0.8+-0.2 Msun and ~0.5Myrs, respectively. The presence towards the star of shock excited optical [S II] and [Fe II] emission as well as near-IR H2 and [Fe II] emission perhaps suggests that a new Herbig-Haro flow is becoming visible close to the star.Comment: 22 pages, 19 Figures, accepted AJ 13 October 200

    Healthcare practitioners' views and experiences of barriers and facilitators to weight management interventions for adults with intellectual disabilities

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    Background Obesity is common in adults with intellectual disabilities, yet little is known about how weight management interventions are provided for this population. Methods Semi‐structured interviews were held with 14 healthcare practitioners involved in weight management interventions in an English county. A study topic guide was developed to elicit practitioners' views and experiences of barriers and facilitators to weight management for adults with intellectual disabilities. Responses were analysed using thematic analysis. Results Several barriers are involved in weight management for people with intellectual disabilities including communication challenges, general practitioners' lack of knowledge and awareness of weight management services, inconsistencies in caring support, resource constraints, wider external circumstances surrounding the individuals and motivational issues. Facilitators include reasonable adjustments to existing weight management services. However, there is a need for specialist weight management provision for people with intellectual disabilities. Conclusions This study provides suggestions for future research, policy and practice consideration

    Coaches as sport workers: professional agency within the employment context of elite European basketball

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    Increased activity of multiple stakeholders (e.g. agents and owners) have created new challenges for some coaches working in professional sports clubs. The purpose of this project was to draw attention to the normative or accepted practices inherent in sport work, some of the day-to-day realities of some coaches working in this context, and to understand how coaches' perceptions of other stakeholders come to bear on their individual circumstances, career expectations/objectives and professional agency. Data were generated from semi-structured interviews with seven professional basketball coaches who worked in top-level European clubs. The analysis reveals the coach's relationships between some owners and agents differed with respect to exercising professional agency, and, coach's decisions and actions were tied to their professional ideals as well as understandings of what they need to undertake their work effectively and negotiation and/or adjustment strategies. Occasionally coach's work practices could be viewed as antithetical to employment security, however, the presence of insecurity was at times embraced and used strategically to affect workers' career decisions. Amid contemporary regional geo-political shifts, this work aids examinations of global sport settings, structures and issues that may contour sporting professionals' live

    The Spitzer survey of interstellar clouds in the Gould Belt. II. The Cepheus Flare observed with IRAC and MIPS

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    We present Spitzer IRAC (~2 deg^2) and MIPS (~8 deg^2) observations of the Cepheus Flare which is associated with the Gould Belt, at an approximate distance of ~300 pc. Around 6500 sources are detected in all four IRAC bands, of which ~900 have MIPS 24 micron detections. We identify 133 YSO candidates using color-magnitude diagram techniques, a large number of the YSO candidates are associated with the NGC 7023 reflection nebula. Cross identifications were made with the Guide Star Catalog II and the IRAS Faint Source Catalog, and spectral energy distributions (SED) were constructed. SED modeling was conducted to estimate the degree of infrared excess. It was found that a large majority of disks were optically thick accreting disks, suggesting that there has been little disk evolution in these sources. Nearest-neighbor clustering analysis identified four small protostellar groups (L1228, L1228N, L1251A, and L1251B) with 5-15 members each and the larger NGC 7023 association with 32 YSO members. The star formation efficiency for cores with clusters of protostars and for those without clusters was found to be ~8% and ~1% respectively. The cores L1155, L1241, and L1247 are confirmed to be starless down to our luminosity limit of L_bol=0.06 L_sol.Comment: Submitted to ApJSS. 20 figures, 110 page

    A Social Network Analysis of the Literature on Management Control

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    Journal of Management Accounting Research, 23, 259-283.The article of record as published may be found at http://dx.doi.org/10.2308/jmar-10086This paper investigates the literature on management control published in accounting and management journals. Social network analysis of citation data from the 25-year period 1981–2005 enables us to examine topics and ties among researchers. Social ties have important consequences for the development of the literature, shaping topics, research methods, and the diffusion of knowledge. We observe minimal communication between the two disciplines, appearing as two distinct communities despite similar interests. This lack of communication includes citations and authoring across the two disciplines. When citations across disciplines occur, it is almost exclusively accounting authors citing management authors, not vice versa. There is virtually no joining of accounting and management scholars within social networks. Within the two broader communities, there also exist smaller research clusters. While we cannot determine the impact this has on our understanding of management control, we discuss possible reasons for this phenomenon and its potential implications for management control research

    Person-centred planning: factors associated with successful outcomes for people with intellectual disabilities

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    Background Recent research in the USA and UK indicates that person-centred planning (PCP) can lead to improvements in lifestyle-related outcomes for people with intellectual disabilities (ID). It is clear, however, that the introduction of PCP does not have an equal impact for all participants. The aim of the present paper was to identify factors associated with the probability of delivering a plan and with improvements in outcomes for those who did receive a plan. Methods Information on the life experiences of participants was collected over a period of approximately 2 years for a cohort of 93 adults with ID. Results There were powerful inequalities in both access to and the efficacy of PCP in relation to participant characteristics, contextual factors and elements of the PCP process. Conclusions Results are discussed in relation to implications for policy and practice for increasing the effectiveness of PCP and reducing inequalities in the life experiences of people with ID
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