1,106 research outputs found
Patterns and outcomes of preterm hospital admissions during pregnancy in NSW, 2001-2008
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Flow Equations without Mean Field Ambiguity
We compare different methods used for non-perturbative calculations in
strongly interacting fermionic systems. Mean field theory often shows a basic
ambiguity related to the possibility to perform Fierz transformations. The
results may then depend strongly on an unphysical parameter which reflects the
choice of the mean field, thus limiting the reliability. This ambiguity is
absent for Schwinger-Dyson equations or fermionic renormalization group
equations. Also renormalization group equations in a partially bosonized
setting can overcome the Fierz ambiguity if the truncation is chosen
appropriately. This is reassuring since the partially bosonized renormalization
group approach constitutes a very promising basis for the explicit treatment of
condensates and spontaneous symmetry breaking even for situations where the
bosonic correlation length is large.Comment: New version to match the one published in PRD. New title (former
title: Solving Mean Field Ambiguity by Flow Equations), added section IX and
appendix B. More explanations in the introduction and conclusions. 16 pages,
6 figures and 3 tables uses revtex
Thin-shell wormholes with a generalized Chaplygin gas in Einstein-Born-Infeld theory
We construct spherically symmetric thin-shell wormholes supported by a
generalized Chaplygin gas in Born-Infeld electrodynamics coupled to Einstein
gravity, and we analyze their stability under radial perturbations. For
different values of the Born-Infeld parameter and the charge, we compare the
results with those obtained in a previous work for Maxwell electrodynamics. The
stability region in the parameter space reduces and then disappears as the
value of the Born-Infeld parameter is modified in the sense of a larger
departure from Maxwell theory.Comment: 9 pages, 6 figures; v2: improved versio
Blood Eosinophil Count Predicts Treatment Failure and Hospital Readmission for COPD
ACKNOWLEDGEMENTS This study was funded by AstraZeneca. Editorial support was provided by Joanne M. Faysal, MS, and Jennie G. Jacobson, PhD, CMPP, of JK Associates, Inc., and Michael A. Nissen, ELS, of AstraZeneca. This support was funded by AstraZeneca. DATA-SHARING STATEMENT Data underlying the findings described in this manuscript may be requested in accordance with AstraZeneca’s data-sharing policy described at https://astrazenecagroupdt.pharmacm.com/DT/HomePeer reviewedPublisher PD
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