Multilevel factors influencing preterm birth in an urban setting

Racial disparity in preterm is a major problem in the US.Although significant strides have been made in identifying some of the risk factors, the complexities between community and individual factors are not understood.This study examines the influence of individual and community level factors affecting preterm birth among Black and White women in

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A gluing operator for the ambitwistor string

Abstract We present a new operator in the ambitwistor string which glues together correlators with fewer points or of lower genus.It underpins the recursive construction singtronic speaker of tree-level CHY scattering amplitudes by Dolan & Goddard, as well as the computation of loop integrands on a Riemann sphere by Geyer et al.The gluing operator

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Intra-trackway morphological variations due to substrate consistency: the El Frontal dinosaur tracksite (Lower Cretaceous, Spain).

An ichnological and sedimentological study of the El Frontal dinosaur tracksite (Early Cretaceous, Cameros basin, Soria, Spain) highlights the pronounced intra-trackway variation found in track morphologies of four theropod trackways.Photogrammetric 3D digital models revealed various and distinct intra-trackway morphotypes, which reflect changes in

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