40 research outputs found

    An intercomparison of remote sensing river discharge estimation algorithms from measurements of river height, width, and slope

    Get PDF
    The Surface Water and Ocean Topography (SWOT) satellite mission planned for launch in 2020 will map river elevations and inundated area globally for rivers >100 m wide. In advance of this launch, we here evaluated the possibility of estimating discharge in ungauged rivers using synthetic, daily ‘‘remote sensing’’ measurements derived from hydraulic models corrupted with minimal observational errors. Five discharge algorithms were evaluated, as well as the median of the five, for 19 rivers spanning a range of hydraulic and geomorphic conditions. Reliance upon a priori information, and thus applicability to truly ungauged reaches, varied among algorithms: one algorithm employed only global limits on velocity and depth, while the other algorithms relied on globally available prior estimates of discharge. We found at least one algorithm able to estimate instantaneous discharge to within 35% relative root-mean-squared error (RRMSE) on 14/16 nonbraided rivers despite out-of-bank flows, multichannel planforms, and backwater effects. Moreover, we found RRMSE was often dominated by bias; the median standard deviation of relative residuals across the 16 nonbraided rivers was only 12.5%. SWOT discharge algorithm progress is therefore encouraging, yet future efforts should consider incorporating ancillary data or multialgorithm synergy to improve results

    The management of acute venous thromboembolism in clinical practice. Results from the European PREFER in VTE Registry

    Get PDF
    Venous thromboembolism (VTE) is a significant cause of morbidity and mortality in Europe. Data from real-world registries are necessary, as clinical trials do not represent the full spectrum of VTE patients seen in clinical practice. We aimed to document the epidemiology, management and outcomes of VTE using data from a large, observational database. PREFER in VTE was an international, non-interventional disease registry conducted between January 2013 and July 2015 in primary and secondary care across seven European countries. Consecutive patients with acute VTE were documented and followed up over 12 months. PREFER in VTE included 3,455 patients with a mean age of 60.8 ± 17.0 years. Overall, 53.0 % were male. The majority of patients were assessed in the hospital setting as inpatients or outpatients (78.5 %). The diagnosis was deep-vein thrombosis (DVT) in 59.5 % and pulmonary embolism (PE) in 40.5 %. The most common comorbidities were the various types of cardiovascular disease (excluding hypertension; 45.5 %), hypertension (42.3 %) and dyslipidaemia (21.1 %). Following the index VTE, a large proportion of patients received initial therapy with heparin (73.2 %), almost half received a vitamin K antagonist (48.7 %) and nearly a quarter received a DOAC (24.5 %). Almost a quarter of all presentations were for recurrent VTE, with >80 % of previous episodes having occurred more than 12 months prior to baseline. In conclusion, PREFER in VTE has provided contemporary insights into VTE patients and their real-world management, including their baseline characteristics, risk factors, disease history, symptoms and signs, initial therapy and outcomes

    Grandfathering as spatio-temporal practice: conceptualizing performances of ageing masculinities in contemporary familial carescapes

    No full text
    This paper examines the spatio-temporalities of the intergenerational caring practices that contemporary grandfathers engage in with their grandchildren, in order to critique old men’s constructions and performances of ageing masculinities, and the gendering and ageing of contemporary carescapes. Findings are based on 31 qualitative interviews and two participant observations, conducted in the North-West of England with men who are grandfathers. The concept of carescapes (Bowlby, Gregory and McKie 1997) is employed to explain that grandfathering is both spatially and temporally organized. Findings suggest that men construct distinctly masculine spaces of care later in life, contingent on both their resistance to spatially embedded ageism and their comparisons of grandfathering to previous lifecourse subjectivities, such as fathering. Complexity and diversity in how men negotiate these factors is also apparent and is explored. There is evidence for example that some men’s performances of ageing masculinities contribute to the maintenance of a gendered division of labour in family care work, while others perform alternative masculinities that offer potential to transform gendered carespaces. This is further mediated by intergenerational interactions with children and grandchildren. Focus on old men who are grandfathers necessarily complicates geographical perspectives on the spatio-temporalities of multiple masculinities, ageing and informal familial care
    corecore