781 research outputs found

    El vacío institucional en el modelo de elección racional aplicado a la fecundidad

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    Este artículo trata dos ideas básicas. La primera es que el modelo de racionalidad aplicado a la fecundidad y la interacción entre cantidad y calidad no fueron formulados inicialmente por Becker, y aunque dicha relación hoy parece clara y evidente no es obvia. La segunda es que desde el comienzo el análisis de la fecundidad ha considerado el contexto institucional. Las críticas al modelo de Becker y los desarrollos posteriores refuerzan la importancia de las instituciones para explicar las variaciones de la fecundidad.pensamiento económico, teoría del consumidor, familia, fecundidad, instituciones

    Nuevas tecnologías en levantamientos aplicadas a la restauración: “El Giraldillo’’

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    [ES] El trabajo hace referencia al levantamiento mediante un escáner láser basado en tiempo de vuelo y modelado sólido de la copia, realizada por métodos tradicionales, de la veleta que corona la torre de la Giralda de Sevilla, el conocido “Giraldillo”.Las grandes dimensiones del objeto de estudio y su ubicación en un lugar público hacen que otros métodos de obtención de datos no puedan aplicarse o precisen elementos auxiliares para su puesta en práctica, lo cual supondría tener inhabilitada su exposición durante un tiempo.Con ocasión del trabajo se tendrá oportunidad de contrastar los resultados de la aplicación de técnicas de levantamiento mediante estación total láser y escaneado láser tridimensional.[EN] This work consists in the geometric survey of a big statue by means of a laser scanner and solid modelling. It has been chosen, for its complexity and singularity of the image. It’s about the copy of the weather vane that crowns the tower of the Giralda of Seville, the well-known " Giraldillo ", carried out by traditional methods a few years ago. The big dimensions of the study object and its location in a public place make that other methods of obtaining of data cannot be applied without using auxiliary elements to be carried out, this would suppose to have disable its exhibition during a certain time.By means of this experience we will have opportunity to contrast the results of the application of technical of geometric survey with laser total station and threedimensional laser scanner.Barrera Vera, JA.; Pérez Romero, A.; Ortiz Marín, R.; Cobos Gutiérrez, C. (2011). Nuevas tecnologías en levantamientos aplicadas a la restauración: “El Giraldillo’’. Virtual Archaeology Review. 2(3):115-120. https://doi.org/10.4995/var.2011.4628OJS11512023AGUILAR GÁLEA, José A. (2004): Métodos y técnicas de reproducción artística aplicadas a la conservación y difusión del patrimonio escultórico. I Congreso Internacional de Patrimonio, Desarrollo rural y Turismo en el siglo XXI. Osuna.BARRERA VERA, José A. (2006).: Aplicación de tecnologías innovadoras en la documentación geométrica del Patrimonio Arquitectónico y Arqueológico. Tesis Doctoral. Sevilla.BARRERA VERA, José A et al. (2005): Nuevas tecnologías de levantamiento aplicadas a la arqueología y la restauración: La muralla almohade de Sevilla. Sevilla.COBOS GUTIÉRREZ, Carlos et al.(2008): Introducción a la representación gráfica por ordenador. Sevilla (Publicaciones de la Escuela Técnica Superior de Ingenieros de Sevilla)ROCCHINI, C.; CIGNONI, P.; MONTANI,C.; PINGI, P.; SCOPIGNO, R.; FONTANA, R.; GRECO, M.;PAMPALONI, E.;PEZZATI, L.; CYGIELMAN, M.; GIACHIETTI, R.; GORI, G.; MICCIO, M.; PECCHIOLI, R.: 3D Scanning the Minerva of Arezzo.PEZZATI, L. et al. (2008): 3D Scanning of Artworks . Handbook on the Use of Laser in Conservation and Conservation Science.RICO IGLESIAS, Daniel.: Aplicación de herramientas informáticas industriales de alto nivel a levantamientos historico-artisticos: El Giraldillo de Sevilla. Proyecto Fin de Carrera.GALLARDO FUENTES, José M.; JIMÉNEZ MARTIN A. (1998): Cuatro siglos de reparaciones del Giraldillo. El Giraldillo (La mirada del otro). Sevilla.MORÓN DE CASTRO, María F. (2006): La escultura del Giraldillo de la Catedral de Sevilla y su interpretación iconológica. Córdoba: (Publicaciones Caja Sur)

    Rehabilitación protésica mediante implantes endoóseos en un paciente con fisura labio palatina bilateral

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    Introducción: La rehabilitación convencional mediante implantes del maxilar parcialmente edéntulo. Caso clínico:Se presenta el caso clínico de una paciente con labio leporino y fisura palatina bilateral, edéntula parcial superior, que acude al Hospital Virgen del Rocío de Sevilla para valorar las alternativas de tratamiento rehabilitador. El tratamiento más adecuado, debido a las circunstancias generales, es rehabilitar el maxilar superior con una prótesis removible mediante cuatro implantes y una sobredentadura, ocluyendo el defecto, mejorando la retención de la prótesis y slendo fácil la necesidad de higiene que se precisa en este tipo de pacientes con fisura palatina bilateral. Discusión y conclusiones: Los pacientes con labio leporino y fisura palatina son pacientes cornplejos que deben ser evaluados de forma pormenorizada antes de su lnclusión en un protocolo de tratamientos de implantes. No obstante, una vez realizado este punto, son pacientes que pueden beneficiarse de los últimos avances en este campo revolucionario de la Implantología

    Toenail zinc as a biomarker: Relationship with sources of environmental exposure and with genetic variability in MCC-Spain study

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    Background: Toenails are commonly used as biomarkers of exposure to zinc (Zn), but there is scarce information about their relationship with sources of exposure to Zn. Objectives: To investigate the main determinants of toenail Zn, including selected sources of environmental exposure to Zn and individual genetic variability in Zn metabolism. Methods: We determined toenail Zn by inductively coupled plasma mass spectrometry in 3,448 general popu-lation controls from the MultiCase-Control study MCC-Spain. We assessed dietary and supplement Zn intake using food frequency questionnaires, residential proximity to Zn-emitting industries and residential topsoil Zn levels through interpolation methods. We constructed a polygenic score of genetic variability based on 81 single nucleotide polymorphisms in genes involved in Zn metabolism. Geometric mean ratios of toenail Zn across categories of each determinant were estimated from multivariate linear regression models on log-transformed toenail Zn. Results: Geometric mean toenail Zn was 104.1 mu g/g in men and 100.3 mu g/g in women. Geometric mean toenail Zn levels were 7 % lower (95 % confidence interval 1-13 %) in men older than 69 years and those in the upper tertile of fibre intake, and 9 % higher (3-16 %) in smoking men. Women residing within 3 km from Zn-emitting industries had 4 % higher geometric mean toenail Zn levels (0-9 %). Dietary Zn intake and polygenic score were unrelated to toenail Zn. Overall, the available determinants only explained 9.3 % of toenail Zn variability in men and 4.8 % in women. Discussion: Sociodemographic factors, lifestyle, diet, and environmental exposure explained little of the indi-vidual variability of toenail Zn in the study population. The available genetic variants related to Zn metabolism were not associated with toenail Zn

    Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2

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    The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality

    The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra

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    This paper documents the 16th data release (DR16) from the Sloan Digital Sky Surveys (SDSS), the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of data from the Southern Hemisphere survey of the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new data from APOGEE-2 North are also included. DR16 is also notable as the final data release for the main cosmological program of the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and all raw and reduced spectra from that project are released here. DR16 also includes all the data from the Time Domain Spectroscopic Survey and new data from the SPectroscopic IDentification of ERosita Survey programs, both of which were co-observed on eBOSS plates. DR16 has no new data from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey (or the MaNGA Stellar Library "MaStar"). We also preview future SDSS-V operations (due to start in 2020), and summarize plans for the final SDSS-IV data release (DR17)

    Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

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    A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

    Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

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    A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV
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