73 research outputs found

    Correspondence Model Of Occupational Accidents

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    We present a new generalized model for the diagnosis and prediction of accidents among the Spanish workforce. Based on observational data of the accident rate in all Spanish companies over eleven years (7,519,732 accidents), we classified them in a new risk-injury contingency table (19x19). Through correspondence analysis, we obtained a structure composed of three axes whose combination identifies three separate risk and injury groups, which we used as a general Spanish pattern. The most likely or frequent relationships between the risk and injuries identified in the pattern facilitated the decision-making process in companies at an early stage of risk assessment. Each risk-injury group has its own characteristics, which are understandable within the phenomenological framework of the accident. The main advantages of this model are its potential application to any other country and the feasibility of contrasting different country results. One limiting factor, however, is the need to set a common classification framework for risks and injuries to enhance comparison, a framework that does not exist today. The model aims to manage work-related accidents automatically at any level

    Validación, robustez y estabilidad en decisión multicriterio: análisis de sensibilidad en el proceso analítico jerárquico

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    El trabajo aborda el estudio de uno de los tópicos que más interés están despertando durante los últimos tiempos en el campo de la decisión multicriterio: el Análisis del Comportamiento. A continuación, conforme a los tres niveles considerados habitualmente en planificación (estratégico, táctico y operativo), se plantea efectuar este análisis en tres ámbitos: Validez de la Aproximación, Robustez del Modelo y Estabilidad de la Solución. Cada uno de estos ámbitos evaluará, respectivamente, la efectividad, eficacia y eficiencia del proceso de decisión seguido. Tras una breve descripción de algunos de los matices que los distinguen, se presentan los intervalos de estabilidad y se obtienen los. intervalos de estabilidad globales de un juicio en dos ámbitos (problemas tipo a: y y). Esta herramienta, utilizada en el análisis de sensibilidad (estabilidad) de las ordenaciones obtenidas con el Proceso Analítico Jerárquico (AHP), será empleada, bajo el paradigma de la racionalidad procedimental multicriterio, en la detección de los hechos diferenciados y pautas de comportamiento, y en la fijación de caminos de consenso entre los actores implicados en el proceso de toma de decisiones

    Interpretación de las relaciones intragrupales de riesgos y lesiones mediante análisis cluster jerárquico

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    A partir de los análisis cluster jerarquico de riesgos y de lesiones, se obtiene la secuencia del proceso de conglomeracion, basado en este caso en el metodo de Ward. El interes de dicho proceso de conglomeracion, para el caso de las variables riesgo y lesion,componentes del accidente laboral, se centra en que permite interpretar las relaciones entre dichas variables paso a paso, es decir, permite interpretar las afinidades existentes entre dichas variables a escala intragrupal. De esta manera se pueden explicar las relaciones que los diversos clusters van describiendo. Para el caso de los accidentes laborales, esta informacion interpretativa es de vital importancia al posibilitar asociar un significado a las relaciones entre variables obtenidas matematicamente, base conceptual de cualquier sistema inteligente

    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

    Measurements of top-quark pair differential cross-sections in the eμe\mu channel in pppp collisions at s=13\sqrt{s} = 13 TeV using the ATLAS detector

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    Measurement of the W boson polarisation in ttˉt\bar{t} events from pp collisions at s\sqrt{s} = 8 TeV in the lepton + jets channel with ATLAS

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    Search for dark matter in association with a Higgs boson decaying to bb-quarks in pppp collisions at s=13\sqrt s=13 TeV with the ATLAS detector

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    Charged-particle distributions at low transverse momentum in s=13\sqrt{s} = 13 TeV pppp interactions measured with the ATLAS detector at the LHC

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    Measurement of jet fragmentation in Pb+Pb and pppp collisions at sNN=2.76\sqrt{{s_\mathrm{NN}}} = 2.76 TeV with the ATLAS detector at the LHC

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    Measurement of the bbb\overline{b} dijet cross section in pp collisions at s=7\sqrt{s} = 7 TeV with the ATLAS detector

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