76,214 research outputs found

    Laser apparatus for removing material from rotating objects Patent

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    Laser device for removing material from rotating object for dynamic balancin

    Approximating C1,0C^{1,0}-foliations

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    We extend the Eliashberg-Thurston theorem on approximations of taut oriented C2C^2-foliations of 3-manifolds by both positive and negative contact structures to a large class of taut oriented C1,0C^{1,0}-foliations, where by C1,0C^{1,0} foliation, we mean a foliation with continuous tangent plane field. These C1,0C^{1,0}-foliations can therefore be approximated by weakly symplectically fillable, universally tight, contact structures. This allows applications of C2C^2-foliation theory to contact topology and Floer theory to be generalized and extended to constructions of C1,0C^{1,0}-foliations.Comment: 52 pages, 5 figures. Final version with updated references, corrections and terminolog

    Communications

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    Learning on the Halfshell

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    Born to be wide? Exploring correlations in mother and adolescent body mass index using data from the British household panel survey

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    The channels contributing to the intergenerational correlation in body mass are not well understood. Decomposition analysis is used to estimate the contribution of maternal characteristics, household income, and adolescent behaviours related to eating and physical activity on the intergenerational correlation in BMI. The analysis uses data on mothers and their adolescent children aged 11 to 15 from the British Household Panel Survey (2004 and 2006). The overall intergenerational correlation in BMI is 0.25. Maternal educational attainment and adolescent participation in some form of physical activity on a daily basis are the largest contributing factors to the intergenerational correlation in BMI. Maternal employment and more than four hours a day of television viewing by the adolescent are also important contributing factors. Overall, observable characteristics explain 11.2% of the intergenerational correlation in BMI
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