76,214 research outputs found
Laser apparatus for removing material from rotating objects Patent
Laser device for removing material from rotating object for dynamic balancin
Approximating -foliations
We extend the Eliashberg-Thurston theorem on approximations of taut oriented
-foliations of 3-manifolds by both positive and negative contact
structures to a large class of taut oriented -foliations, where by
foliation, we mean a foliation with continuous tangent plane field.
These -foliations can therefore be approximated by weakly
symplectically fillable, universally tight, contact structures. This allows
applications of -foliation theory to contact topology and Floer theory to
be generalized and extended to constructions of -foliations.Comment: 52 pages, 5 figures. Final version with updated references,
corrections and terminolog
Born to be wide? Exploring correlations in mother and adolescent body mass index using data from the British household panel survey
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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