1,671 research outputs found
An Optimal Self-Stabilizing Firing Squad
Consider a fully connected network where up to processes may crash, and
all processes start in an arbitrary memory state. The self-stabilizing firing
squad problem consists of eventually guaranteeing simultaneous response to an
external input. This is modeled by requiring that the non-crashed processes
"fire" simultaneously if some correct process received an external "GO" input,
and that they only fire as a response to some process receiving such an input.
This paper presents FireAlg, the first self-stabilizing firing squad algorithm.
The FireAlg algorithm is optimal in two respects: (a) Once the algorithm is
in a safe state, it fires in response to a GO input as fast as any other
algorithm does, and (b) Starting from an arbitrary state, it converges to a
safe state as fast as any other algorithm does.Comment: Shorter version to appear in SSS0
Attachment style moderates partner presence effects on pain : A laser-evoked potentials study
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly citedSocial support is crucial for psychological and physical well-being. Yet, in experimental and clinical pain research, the presence of others has been found to both attenuate and intensify pain. To investigate the factors underlying these mixed effects, we administered noxious laser stimuli to 39 healthy women while their romantic partner was present or absent, and measured pain ratings and laser-evoked potentials to assess the effects of partner presence on subjective pain experience and underlying neural processes. Further, we examined whether individual differences in adult attachment style, alone or in interaction with the partner's level of attentional focus (manipulated to be either on or away from the participant) might modulate these effects. We found that the effects of partner presence versus absence on pain-related measures depended on adult attachment style but not partner attentional focus. The higher participants' attachment avoidance, the higher pain ratings and N2 and P2 local peak amplitudes were in the presence compared to the absence of the romantic partner. As laser-evoked potentials are thought to reflect activity relating to the salience of events, our data suggest that partner presence may influence the perceived salience of events threatening the body, particularly in individuals who tend to mistrust others.Peer reviewedFinal Published versio
Photon polarization in radiative B decays
We study decay distributions in B -> K pi pi gamma, combining contributions
from several overlapping resonances in a K pi pi mass range near 1400 MeV,
(1^+) K_1(1400), (2^+) K^*_2(1430) and (1^-) K^*(1410). A method is proposed
for using these distributions to determine a photon polarization parameter in
the effective radiative weak Hamiltonian. This parameter is measured through an
up-down asymmetry of the photon direction relative to the K pi pi decay plane.
We calculate a dominant up-down asymmetry of 0.33 +- 0.05 from the K1(1400)
resonance, which can be measured with about 10^8 B B-bar pairs, thus providing
a new test for the Standard Model and a probe for some of its extensions.Comment: 22 pages, 3 figures, version to appear in Phys. Rev.
Lepton polarization asymmetry in radiative dileptonic B-meson decays in MSSM
In this paper we study the polarization asymmetries of the final state lepton
in the radiative dileptonic decay of B meson (\bsllg) in the framework of
Minimal Supersymmetric Standard Model (MSSM) and various other unified models
within the framework of MSSM e.g. mSUGRA, SUGRA (where condition of
universality of scalar masses is relaxed) etc. Lepton polarization, in addition
of having a longitudinal component (\pl), can have two other components, \pt
and \pn, lying in and perpendicular to the decay plane, which are proportional
to \ml and hence are significant for final state being or
. We analyse the dependence of these polarization asymmetries
on the parameters of the various models.Comment: typos corrected to match with published versio
Test of the Running of in Decays
The decay rate into hadrons of invariant mass smaller than
can be calculated in QCD assuming global
quark--hadron duality. It is shown that this assumption holds for
~GeV. From measurements of the hadronic mass distribution, the
running coupling constant is extracted in the range
0.7~GeV. At , the result is
. The running of is in good
agreement with the QCD prediction.Comment: 9 pages, 3 figures appended; shortened version with new figures, to
appear in Physical Review Letters (April 1996
Supersymmetric Effects on Isospin Symmetry Breaking and Direct CP Violation in
We argue that one can search for physics beyond the standard model through
measurements of the isospin-violating quantity , its charge conjugate
, and direct CP violation in the partial decay rates of . We illustrate this by working out theoretical profiles of the
charge-conjugate averaged ratio and the CP asymmetry in the
standard model and in some variants of the minimal supersymmetric standard
model. We find that chargino contributions in the large region may
modify the magnitudes and flip the signs of and compared to their standard-model values, providing an
unmistakeable signature of supersymmetry.Comment: 10 pages, 7 figures (requires graphicx
QCD-based description of one-particle inclusive B decays
We discuss one-particle inclusive B decays in the limit of heavy b and c
quarks. Using the large-N_C limit we factorize the non-leptonic matrix
elements, and we employ a short distance expansion. Modeling the remaining
nonperturbative matrix elements we obtain predictions for various decay
channels and compare them with existing data.Comment: LaTeX, 22 pages, 6 figures (eps); analytical and numerical results
unchanged, misrepresentation of experimental data in Fig. 5 corrected, final
published versio
WLL Project Evaluation and Learning
Welcome to the concluding final evaluation and learning report for the Women’s Lives Leeds (WLL) Project. The Women’s Lives Leeds (WLL) Project was a Big Lottery, since renamed National Lottery Community Fund (NLCF), Women and Girls Initiative Funded 4-year Project that delivered a range of opportunities including frontline services that enabled women and girls to lead safer and healthier lives and was created by a partnership of Women’s led and centred organisations in Leeds, who joined together to form the “WLL Partnership” in May 2015. The Partnership included Asha Neighbourhood Centre, Basis Yorkshire, Behind Closed Doors, Getaway Girls, Hooner Kelah, Leeds Women’s Aid, HALT (who have since merged with LWA), Nari Ekta, Shantona Women’s Centre, Together Women, Women’s Counselling and Therapy Service, and Women’s Health Matters. Between them they have a collective of over 250 years’ experience supporting the most vulnerable women and girls across the city of Leeds who experience multiple needs including; mental health, domestic abuse, sexual violence and exploitation, experience of the criminal justice system, sex work and substance misuse. The focus of the work was on providing support to the most disadvantaged communities in Leeds, with the aim of reaching greater numbers of the most vulnerable women, ensuring they receive holistic, joined-up support no matter where in the city they live. As one, they applied to the Big Lottery’s, Women’s and Girls Initiative fund, to fund the WLL Project and later that year were successful. The partnership was granted over £2.2mil over a 4-year timescale. The WLL Project focussed on Women, Young Women and Girls and identified specific target groups: young women, women with complex needs and recently arrived new migrant communities and was based on initial research completed in December 2015 that identified current needs. The Project aimed to achieve the following 3 outcomes: 1. Improved and extended access for vulnerable women and girls in Leeds to the services and support they want, when they choose 2. A holistic response to ensure that the needs of women and girls with multiple and complex issues are better supported 3. Women and Girls will be empowered to support their peers and influence service delivery, development and design across the city The Executive Summary was completed in November 2020 and has already been shared with all stakeholders, partners and commissioners including Leeds City Council, Public Health and Clinical Commissioning Groups. The purpose of this report is to detail the learning, challenges and successes taken from project delivery throughout its lifespan and its achievements with the aim for this to be shared to inform other providers in their service development. This report has been informed by views from service users, external stakeholders, ongoing external evaluation, staff and the WLL Alliance gathered over the last four years
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