Effective Field Theory of Gravity: Leading Quantum Gravitational Corrections to Newtons and Coulombs Law

In this paper we consider general relativity and its combination with scalar quantum electrodynamics (QED) as an effective quantum field theory at energies well below the Planck scale. This enables us to compute the one-loop quantum corrections to the Newton and Coulomb potential induced by the combination of graviton and photon fluctuations. We derive the relevant Feynman rules and compute the nonanalytical contributions to the one-loop scattering matrix for charged scalars in the nonrelativistic limit. In particular, we derive the post-Newtonian corrections of order $Gm/\text c^2 r$ from general relativity and the genuine quantum corrections of order $G\hbar/\text c^3 r^2$.Comment: 14 pages, 12 figure

Reciprocity questionnaire

This project is part of a collaborative project with the research group “Reciprocals across languages” led by Nick Evans. One goal of this project is to develop a typology of reciprocals. This questionnaire is designed to help field workers get an overview over the type of markers used in the expression of reciprocity in the language studied

Time-Delay Interferometry

Equal-arm interferometric detectors of gravitational radiation allow phase measurements many orders of magnitude below the intrinsic phase stability of the laser injecting light into their arms. This is because the noise in the laser light is common to both arms, experiencing exactly the same delay, and thus cancels when it is differenced at the photo detector. In this situation, much lower level secondary noises then set overall performance. If, however, the two arms have different lengths (as will necessarily be the case with space-borne interferometers), the laser noise experiences different delays in the two arms and will hence not directly cancel at the detector. In order to solve this problem, a technique involving heterodyne interferometry with unequal arm lengths and independent phase-difference readouts has been proposed. It relies on properly time-shifting and linearly combining independent Doppler measurements, and for this reason it has been called Time-Delay Interferometry (or TDI). This article provides an overview of the theory and mathematical foundations of TDI as it will be implemented by the forthcoming space-based interferometers such as the Laser Interferometer Space Antenna (LISA) mission. We have purposely left out from this first version of our ``Living Review'' article on TDI all the results of more practical and experimental nature, as well as all the aspects of TDI that the data analysts will need to account for when analyzing the LISA TDI data combinations. Our forthcoming ``second edition'' of this review paper will include these topics.Comment: 51 pages, 11 figures. To appear in: Living Reviews. Added conten

Influence of magnetic cycles on stellar prominences and their mass loss rates

Funding: The authors acknowledge support from STFC consolidated grant number ST/R000824/1.Observations of rapidly-rotating cool stars often show coronal “slingshot” prominences that remove mass and angular momentum when they are ejected. The derived masses of these prominences show a scatter of some two orders of magnitude. In order to investigate if this scatter could be intrinsic, we use a full magnetic cycle of solar magnetograms to model the coronal structure and prominence distribution in a young Sun, where we scale the field strength in the magnetograms with angular velocity according to B∝Ω−1.32. We reproduce both the observed prominence masses and their scatter. We show that both the field strength and the field geometry contribute to the prominence masses that can be supported and to the rate at which they are ejected. Predicted prominence masses follow the magnetic cycle, but with half the period, peaking both at cycle maximum and at cycle minimum. We show that mass loss rates in prominences are less than those predicted for the stellar wind. We also investigate the role of small-scale field that may be unresolved in typical stellar magnetograms. This provides only a small reduction in the predicted total prominence mass, principally by reducing the number of large magnetic loops that can support slingshot prominences. We conclude that the observed scatter in prominence masses can be explained by underlying magnetic cycles.PostprintPeer reviewe

A Rac1-independent role for P-Rex1 in melanoblasts

No abstract available

On two intrinsic length scales in polymer physics: topological constraints vs. entanglement length

The interplay of topological constraints, excluded volume interactions, persistence length and dynamical entanglement length in solutions and melts of linear chains and ring polymers is investigated by means of kinetic Monte Carlo simulations of a three dimensional lattice model. In unknotted and unconcatenated rings, topological constraints manifest themselves in the static properties above a typical length scale $dt \sim 1/\sqrt{l\phi}$ ($\phi$ being the volume fraction, $l$ the mean bond length). Although one might expect that the same topological length will play a role in the dynamics of entangled polymers, we show that this is not the case. Instead, a different intrinsic length de, which scales like excluded volume blob size $\xi$, governs the scaling of the dynamical properties of both linear chains and rings.Comment: 7 pages. 4 figure

Child Custody Evaluators’ Beliefs About Domestic Abuse Allegations: Their Relationship to Evaluator Demographics, Background, Domestic Violence Knowledge and Custody- Visitation Recommendations

U.S. Department of Justice, National Institute of Justice. Award Number: 2007-WG-BX-0013Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/92472/1/Saunders-Faller-Tolman 2011 Custody evaluator beliefs about domestic abuse - NIJ Final Report-NCJRS 238891.pd

Beliefs and Recommendations Regarding Child Custody and Visitation in Cases Involving Domestic Violence A Comparison of Professionals in Different Roles

Research is lacking on differing perspectives regarding custody cases involving domestic violence (DV). In a survey of judges, legal aid attorneys, private attorneys, DV program workers, and child custody evaluators (n = 1,187), judges, private attorneys, and evaluators were more likely to believe that mothers make false DV allegations and alienate their children. In response to a vignette, evaluators and private attorneys were most likely to recommend joint custody and least likely to recommend sole custody to the survivor. Legal aid attorneys and DV workers were similar on many variables. Gender, DV knowledge, and knowing victims explained many group differences.This research was supported by a grant from the National Institute of Justice, 2007-WG-BX-0013.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/116619/1/Saunders-Faller-Tolman 2015 Comparison of Professionals re Beliefs about DV & Cutsody - Violence Against Women.pdfDescription of Saunders-Faller-Tolman 2015 Comparison of Professionals re Beliefs about DV & Cutsody - Violence Against Women.pdf : Articl