8 research outputs found

    Supplement: "Localization and broadband follow-up of the gravitational-wave transient GW150914" (2016, ApJL, 826, L13)

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    This Supplement provides supporting material for Abbott et al. (2016a). We briefly summarize past electromagnetic (EM) follow-up efforts as well as the organization and policy of the current EM follow-up program. We compare the four probability sky maps produced for the gravitational-wave transient GW150914, and provide additional details of the EM follow-up observations that were performed in the different bands

    Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

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    A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

    La mujer en posparto: un fenómeno de interés e intervención para la disciplina de enfermería

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    Introducción: El posparto constituye un fenómeno de interés para la disciplina de enfermería, y ostenta una trayectoria histórica desde el inicio de las prácticas de cuidado; es una etapa determinante para la mujer por la complejidad que deriva el proceso de convertirse en madre. El objetivo del artículo es reconocer y analizar las necesidades de la mujer en pos parto, como base para la  construcción de herramientas para la planeación del cuidado y auto cuidado de la diada, que fomenten la activación del rol maternal y la disminuyan de la morbi-mortalidad materno- perinatal; a parir de la revisión sistemática e integrativa de literatura científica. Materiales y Métodos: Revisión de bases de datos LILACS, PUBMED, SciELO, SCOPUS, SCIENCE DIRECT, EBSCO; Para guiar la revisión de artículos se formuló la siguiente pregunta ¿Cuáles son los productos científicos relacionados con las necesidades de la mujer en pos parto, que lleven a la construcción de intervenciones de enfermería? Resultados: Se seleccionaron 70 artículos y se realizó la lectura exploratoria para la selección de textos para el análisis; La muestra final de esta revisión fueron 50 artículos  citados en el estudio. Discusión y Conclusiones: Enfermería como profesión, debe estructurar  intervenciones sustentadas en teoría disciplinar que permitan actuar sobre las necesidades de la mujer en pos parto a partir del apoyo social que  hace referencia a la cantidad de ayuda que recibe realmente, la satisfacción que produce esa ayuda y las personas (enfermería) que la proporcionan, el cual permitirá brindar cuidado humanizado, individual, personalizado de reciprocidad a la mujer ,recién nacido, pareja y/o familia como medio para disminuir la morbi-mortalidad al mejorar su calidad de vida.Palabras clave: Puerperio, Cuidado de Enfermería, Cuidado Domiciliario. (Fuente: DeCS BIREME).Cómo citar este artículo: Moreno C, Rincón T, Arenas YM, Sierra D, Cano ÁP, Cárdenas DL. La mujer en  posparto: un fenómeno de interés e intervención para la disciplina de enfermería. Rev Cuid. 2014; 5(2): 739-47. http://dx.doi.org/10.15649/cuidarte.v5i2.86</p

    Risk of COVID-19 after natural infection or vaccinationResearch in context

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    Summary: Background: While vaccines have established utility against COVID-19, phase 3 efficacy studies have generally not comprehensively evaluated protection provided by previous infection or hybrid immunity (previous infection plus vaccination). Individual patient data from US government-supported harmonized vaccine trials provide an unprecedented sample population to address this issue. We characterized the protective efficacy of previous SARS-CoV-2 infection and hybrid immunity against COVID-19 early in the pandemic over three-to six-month follow-up and compared with vaccine-associated protection. Methods: In this post-hoc cross-protocol analysis of the Moderna, AstraZeneca, Janssen, and Novavax COVID-19 vaccine clinical trials, we allocated participants into four groups based on previous-infection status at enrolment and treatment: no previous infection/placebo; previous infection/placebo; no previous infection/vaccine; and previous infection/vaccine. The main outcome was RT-PCR-confirmed COVID-19 >7–15 days (per original protocols) after final study injection. We calculated crude and adjusted efficacy measures. Findings: Previous infection/placebo participants had a 92% decreased risk of future COVID-19 compared to no previous infection/placebo participants (overall hazard ratio [HR] ratio: 0.08; 95% CI: 0.05–0.13). Among single-dose Janssen participants, hybrid immunity conferred greater protection than vaccine alone (HR: 0.03; 95% CI: 0.01–0.10). Too few infections were observed to draw statistical inferences comparing hybrid immunity to vaccine alone for other trials. Vaccination, previous infection, and hybrid immunity all provided near-complete protection against severe disease. Interpretation: Previous infection, any hybrid immunity, and two-dose vaccination all provided substantial protection against symptomatic and severe COVID-19 through the early Delta period. Thus, as a surrogate for natural infection, vaccination remains the safest approach to protection. Funding: National Institutes of Health

    Search for direct top squark pair production in final states with two leptons in s=13\sqrt{s} = 13 TeV pppp collisions with the ATLAS detector

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    International audienceThe results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb136.1~\hbox {fb}^{-1} of integrated luminosity from proton–proton collisions at s=13\sqrt{s}=13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t~\tilde{t} and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t~bχ~1±\tilde{t} \rightarrow b \tilde{\chi }_{1}^{\pm } into a b-quark and the lightest chargino with χ~1±Wχ~10\tilde{\chi }_{1}^{\pm } \rightarrow W \tilde{\chi }_{1}^{0} , the decay t~tχ~10\tilde{t} \rightarrow t \tilde{\chi }_{1}^{0} into an on-shell top quark and the lightest neutralino, the three-body decay t~bWχ~10\tilde{t} \rightarrow b W \tilde{\chi }_{1}^{0} and the four-body decay t~bνχ~10\tilde{t} \rightarrow b \ell \nu \tilde{\chi }_{1}^{0} . No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the t~\tilde{t} and χ~10\tilde{\chi }_{1}^{0} masses. The results exclude at 95% confidence level t~\tilde{t} masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches

    Measurements of ttˉt\bar{t} differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pppp collisions at s=13\sqrt{s}=13\, TeV using the ATLAS detector

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    Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and ttˉt\bar{t} system kinematic observables using proton--proton collisions at a center-of-mass energy of s=13\sqrt{s} = 13 TeV. The data set corresponds to an integrated luminosity of 36.136.1 fb1^{-1}, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum pT>500p_{\rm T} > 500 GeV and a second with pT>350p_{\rm T}>350 GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a bb-tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated χ2\chi^2 values. The cross-section for ttˉt\bar{t} production in the fiducial phase-space region is 292±7 (stat)±76(syst)292 \pm 7 \ \rm{(stat)} \pm 76 \rm{(syst)} fb, to be compared to the theoretical prediction of 384±36384 \pm 36 fb

    Measurements of ttˉt\bar{t} differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pppp collisions at s=13\sqrt{s}=13\, TeV using the ATLAS detector

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    Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and ttˉt\bar{t} system kinematic observables using proton--proton collisions at a center-of-mass energy of s=13\sqrt{s} = 13 TeV. The data set corresponds to an integrated luminosity of 36.136.1 fb1^{-1}, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum pT>500p_{\rm T} > 500 GeV and a second with pT>350p_{\rm T}>350 GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a bb-tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated χ2\chi^2 values. The cross-section for ttˉt\bar{t} production in the fiducial phase-space region is 292±7 (stat)±76(syst)292 \pm 7 \ \rm{(stat)} \pm 76 \rm{(syst)} fb, to be compared to the theoretical prediction of 384±36384 \pm 36 fb
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