44 research outputs found

    Evidence of methodological bias in hospital standardised mortality ratios: retrospective database study of English hospitals

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    Objective To assess the validity of case mix adjustment methods used to derive standardised mortality ratios for hospitals, by examining the consistency of relations between risk factors and mortality across hospitals

    Two-dimensional hybrid nanosheets of tungsten disulfide and reduced graphene oxide as catalysts for enhanced hydrogen evolution

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    Composite materials: Tungsten disulfide and WS2/reduced graphene oxide (WS2/rGO) nanosheets were fabricated by hydrothermal synthesis using tungsten chloride, thioacetamide, and graphene oxide (GO) as starting materials. The WS2 nanosheets are efficiently templated on the rGO layer. The WS2/rGO hybrid nanosheets show much better electrocatalytic activity for the hydrogen evolution reaction (see picture) than WS2 nanosheets alone.close321
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