Development of a software tool for risk assessment and analysis based on api 580 and 581

The aim of this paper is to present the development of a standards-based software aPi- RP-580/581, which is running a series of calculations in order to provide greater reliability to Management Structural Integrity of Campo Escuela, which is currently under responsibility of  the Metallurgical Engineering School of Industrial University of Santander, so that the risk of failure associated with the operation of the equipment, be  administered systemically with  a methodology based on quantitative risk values  , and would minimize one of the higher costs with which  development of the  project faces. El objetivo  de este trabajo es presentar el desarrollo de un software basado en la norma API RP-580/581, en el cual se ejecutan una serie de cálculos con el propósito de dar una mayor confiabilidad al proyecto de Gerenciamiento de la Integridad Estructural de Campo Escuela, que actualmente se encuentra en desarrollo en la Escuela de Ingeniería Metalúrgica de la Universidad industrial de Santander; de tal manera que el riesgo de falla asociado al funcionamiento de los equipos, se administre sistemáticamente y con una metodología basada en valores cuantitativos de riesgo, y que además permita eliminar uno de los más altos costos con que se enfrentaba el desarrollo del proyecto. &nbsp

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

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

The ATLAS inner detector trigger performance in pp collisions at 13 TeV during LHC Run 2

The design and performance of the inner detector trigger for the high level trigger of the ATLAS experiment at the Large Hadron Collider during the 2016-18 data taking period is discussed. In 2016, 2017, and 2018 the ATLAS detector recorded 35.6 fb$^{-1}$, 46.9 fb$^{-1}$, and 60.6 fb$^{-1}$ respectively of proton-proton collision data at a centre-of-mass energy of 13 TeV. In order to deal with the very high interaction multiplicities per bunch crossing expected with the 13 TeV collisions the inner detector trigger was redesigned during the long shutdown of the Large Hadron Collider from 2013 until 2015. An overview of these developments is provided and the performance of the tracking in the trigger for the muon, electron, tau and $b$-jet signatures is discussed. The high performance of the inner detector trigger with these extreme interaction multiplicities demonstrates how the inner detector tracking continues to lie at the heart of the trigger performance and is essential in enabling the ATLAS physics programme

Observation of electroweak production of two jets in association with an isolated photon and missing transverse momentum, and search for a Higgs boson decaying into invisible particles at 13 TeV with the ATLAS detector

This paper presents the measurement of the electroweak production of two jets in association with a $Z\gamma$ pair with the $Z$ boson decaying into two neutrinos. It also presents the search for invisible or partially invisible decays of a Higgs boson with a mass of 125 GeV produced through vector-boson fusion with a photon in the final state. These results use data from LHC proton-proton collisions at $\sqrt{s}$ = 13 TeV collected with the ATLAS detector corresponding to an integrated luminosity of 139 fb$^{-1}$. The event signature, shared by all benchmark processes considered for measurements and searches, is characterized by a significant amount of unbalanced transverse momentum and a photon in the final state, in addition to a pair of forward jets. For electroweak production of $Z\gamma$ in association with two jets, the background-only hypothesis is rejected with an observed (expected) significance of 5.2 (5.1) standard deviations. The measured fiducial cross-section for this process is 1.31$\pm$0.29 fb. Observed (expected) upper limit of 0.37 (0.34) at 95% confidence level is set on the branching ratio of a 125 GeV Higgs boson to invisible particles, assuming the Standard Model production cross-section. The signature is also interpreted in the context of decays of a Higgs boson to a photon and a dark photon. An observed (expected) 95% CL upper limit on the branching ratio for this decay is set at 0.018 (0.017), assuming the 125 GeV Standard Model Higgs boson production cross-section

The ATLAS inner detector trigger performance in pp collisions at 13 TeV during LHC Run 2

The design and performance of the inner detector trigger for the high level trigger of the ATLAS experiment at the Large Hadron Collider during the 2016-18 data taking period is discussed. In 2016, 2017, and 2018 the ATLAS detector recorded 35.6 fb$^{-1}$, 46.9 fb$^{-1}$, and 60.6 fb$^{-1}$ respectively of proton-proton collision data at a centre-of-mass energy of 13 TeV. In order to deal with the very high interaction multiplicities per bunch crossing expected with the 13 TeV collisions the inner detector trigger was redesigned during the long shutdown of the Large Hadron Collider from 2013 until 2015. An overview of these developments is provided and the performance of the tracking in the trigger for the muon, electron, tau and $b$-jet signatures is discussed. The high performance of the inner detector trigger with these extreme interaction multiplicities demonstrates how the inner detector tracking continues to lie at the heart of the trigger performance and is essential in enabling the ATLAS physics programme

Diseño de un software para el análisis y evaluación del riesgo basado en las normas api 580 y 581

The aim of this paper is to present the development of a standards-based software aPi- RP-580/581, which is running a series of calculations in order to provide greater reliability to Management Structural Integrity of Campo Escuela, which is currently under responsibility of the Metallurgical Engineering School of Industrial University of Santander, so that the risk of failure associated with the operation of the equipment, be administered systemically with a methodology based on quantitative risk values, and would minimize one of the higher costs with which development of the project faces.El objetivo  de este trabajo es presentar el desarrollo de un software basado en la norma API RP-580/581, en el cual se ejecutan una serie de cálculos con el propósito de dar una mayor confiabilidad al proyecto de Gerenciamiento de la Integridad Estructural de Campo Escuela, que actualmente se encuentra en desarrollo en la Escuela de Ingeniería Metalúrgica de la Universidad industrial de Santander; de tal manera que el riesgo de falla asociado al funcionamiento de los equipos, se administre sistemáticamente y con una metodología basada en valores cuantitativos de riesgo, y que además permita eliminar uno de los más altos costos con que se enfrentaba el desarrollo del proyecto

Memorias IX Congreso Geológico Venezolano (4)

Memorias IX Congreso Geológico Venezolano (4