12 research outputs found
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NACA Technical Notes
Report presenting the theoretical spanwise distributions of circulation resulting from constant angle of attack, steady rolling velocity, steady pitching velocity, and constant vertical acceleration calculated for a series of thin, sweptback, tapered wings with streamwise tips
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NACA Technical Notes
Report presenting comparisons of theoretical and experimental lift coefficients and pressure distributions for five compressor-type cascades of highly cambered NACA 6-series airfoils. The experimental lift coefficients were generally less than the theoretical values for the same mean-flow direction. A justification of the experimental and analytical methods are also provided
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NACA Technical Notes
Report presenting a study of tunnel-induced upwash field for a point element of lift in a rectangular tunnel, which is shown to consist of three superimposed fields that, except for relative position, are independent of the lateral or longitudinal location of the lift element in the tunnel. A contour chart is given of the first field. For tunnels that are not rectangular, the corresponding procedure requires the preparation of a chart for each of several spanwise locations of the lifting element
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NACA Technical Notes
Report presenting an analysis to determine the pressure distribution, span loading, and rolling moment due to small angles of sideslip at supersonic speeds for a series of thin, sweptback, tapered wings with wing tips parallel to the axis of wing symmetry. Three basic series of Mach numbers and plan-form combinations are considered, all of which have supersonic trailing edges in conjunction with both leading edges subsonic, one leading edge subsonic and one leading edge supersonic, and both leading edges supersonic
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General pathology in the Circle: biocultural insights into population health, trauma and care in Neolithic Malta
The ERC-funded FRAGSUS Project (Fragility and sustainability in small island environments: adaptation, culture change and collapse in prehistory, 2013–18) led by Caroline Malone has focused on the unique Temple Culture of Neolithic Malta and its antecedents. This third volume builds on the achievements of Mortuary customs in prehistoric Malta, published by the McDonald Institute in 2009. It seeks to answer many questions posed, but left unanswered, of the more than 200,000 fragments of mainly commingled human remains from the Xagħra Brochtorff Circle on Gozo. The focus is on the interpretation of a substantial, representative subsample of the assemblage, exploring dentition, disease, diet and lifestyle, together with detailed understanding of chronology and the affinity of the ancient population associated with the ‘Temple Culture’ of prehistoric Malta. The first studies of genetic profiling of this population, as well as the results of intra-site GIS and visualization, taphonomy, health and mobility, offer important insights into this complex mortuary site and its ritual. Remarkable evidence on the bioanthropology of care practised by these populations, together with a relatively low level of interpersonal violence, and examples of longevity, reveal new aspects about the Neolithic Maltese. Detailed case studies employing computerized tomography describe disease such as =scurvy and explore dietary issues, whilst physical activity and body size have been assessed through biomechanical analysis, supported by taphonomic study, isotopic analyses, a review of mortuary practices during prehistory and a robust new chronology. The results form a rich contextualized body of material that advances understanding of cultural change within the context of small island insularity, and provides biological comparisons for the graphic figurative art of early Malta. These data and the original assemblage are conserved in the National Museum of Archaeology in Valletta as a resource for future study.This project has received funding from the European Research Council (ERC) under the European Union’s Seventh Framework Programme (FP7-2007-2013) (Grant agreement No. 323727)