261 research outputs found

    Inventario de emisiones atmosféricas a partir de fuentes fijas, móviles y de área en la ciudad de Latacunga

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    OBJETIVO GENERAL: Elaborar el inventario de emisiones atmosféricas a partir de fuente fijas, móviles y de área en la ciudad de Latacunga. PROBLEMA: La deficiencia de los estudios de la gestión calidad del aire en cada ciudad a nivel nacional da una idea imprecisa de la situación actual de contaminantes en la atmosfera. HIPÓTESIS: Realizando el inventario de emisiones atmosféricas a partir de fuentes fijas, móviles y de área se contribuirá a la fase inicial de la gestión de la contaminación atmosférica en la ciudad de Latacunga. MARCO REFERENCIAL: La ciudad de Latacunga está ubicada en la provincia de Cotopaxi en el cantón del mismo nombre, en la hoya del Patate. MARCO METODOLÓGICO: la investigación fue desarrollada con material bibliográfico y consulta a profesores, complementada de visitas de campo a los sectores industriales MARCO TEÓRICO: información del área de estudio, año base, descripción de las fuentes evaluadas, cuantificación de contaminantes considerados, evaluación de la incertidumbre.....GOAL: Develop an inventory of air emissions from stationary sources, mobile and area in the city of Latacunga. PROBLEM: The deficiency of the studies of air quality management in every city nationwide gives a vague idea of the current situation of pollutants in the atmosphere. HYPOTHESIS: Performing an inventory of air emissions from stationary sources, mobile and area will contribute to the initial phase of the management of air pollution in the city of Latacunga. FRAMEWORK: The city of Latacunga is located in the province of Cotopaxi in the canton of the same name, in the valley of Patate. METHODOLOGICAL FRAMEWORK: The research was developed with bibliographical and consultation to teachers, supplemented by field visits to industrial sectors THEORETICAL: information of the study area, the base year, description of the sources evaluated, quantification of pollutants considered, evaluation of uncertaint

    Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

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    Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

    Measurement of the Splitting Function in &ITpp &ITand Pb-Pb Collisions at root&ITsNN&IT=5.02 TeV

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    Data from heavy ion collisions suggest that the evolution of a parton shower is modified by interactions with the color charges in the dense partonic medium created in these collisions, but it is not known where in the shower evolution the modifications occur. The momentum ratio of the two leading partons, resolved as subjets, provides information about the parton shower evolution. This substructure observable, known as the splitting function, reflects the process of a parton splitting into two other partons and has been measured for jets with transverse momentum between 140 and 500 GeV, in pp and PbPb collisions at a center-of-mass energy of 5.02 TeV per nucleon pair. In central PbPb collisions, the splitting function indicates a more unbalanced momentum ratio, compared to peripheral PbPb and pp collisions.. The measurements are compared to various predictions from event generators and analytical calculations.Peer reviewe

    Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV

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    Search for anomalous couplings in boosted WW/WZ -> l nu q(q)over-bar production in proton-proton collisions at root s=8TeV

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    Inclusive Search for a Highly Boosted Higgs Boson Decaying to a Bottom Quark-Antiquark Pair

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    © 2018 CERN. An inclusive search for the standard model Higgs boson (H) produced with large transverse momentum (pT) and decaying to a bottom quark-antiquark pair (bb) is performed using a data set of pp collisions at s=13 TeV collected with the CMS experiment at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb-1. A highly Lorentz-boosted Higgs boson decaying to bb is reconstructed as a single, large radius jet, and it is identified using jet substructure and dedicated b tagging techniques. The method is validated with Z→bb decays. The Z→bb process is observed for the first time in the single-jet topology with a local significance of 5.1 standard deviations (5.8 expected). For a Higgs boson mass of 125 GeV, an excess of events above the expected background is observed (expected) with a local significance of 1.5 (0.7) standard deviations. The measured cross section times branching fraction for production via gluon fusion of H→bb with reconstructed pT > 450 GeV and in the pseudorapidity range -2.5 < η < 2.5 is 74±48(stat)-10+17(syst) fb, which is consistent within uncertainties with the standard model prediction

    Search for new phenomena in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum in pp collisions at √s=13 TeV

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    Search results are presented for physics beyond the standard model in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum. The data sample corresponds to an integrated luminosity of 35.9 fb−1 of proton-proton collisions at s√=13 TeV collected with the CMS detector at the LHC in 2016. The analysis uses the invariant mass of the lepton pair, searching for a kinematic edge or a resonant-like excess compatible with the Z boson mass. The search for a kinematic edge targets production of particles sensitive to the strong force, while the resonance search targets both strongly and electroweakly produced new physics. The observed yields are consistent with the expectations from the standard model, and the results are interpreted in the context of simplified models of supersymmetry. In a gauge mediated supersymmetry breaking (GMSB) model of gluino pair production with decay chains including Z bosons, gluino masses up to 1500–1770 GeV are excluded at the 95% confidence level depending on the lightest neutralino mass. In a model of electroweak chargino-neutralino production, chargino masses as high as 610 GeV are excluded when the lightest neutralino is massless. In GMSB models of electroweak neutralino-neutralino production, neutralino masses up to 500-650 GeV are excluded depending on the decay mode assumed. Finally, in a model with bottom squark pair production and decay chains resulting in a kinematic edge in the dilepton invariant mass distribution, bottom squark masses up to 980–1200 GeV are excluded depending on the mass of the next-to-lightest neutralino

    Search for electroweak production of charginos and neutralinos in multilepton final states in proton-proton collisions at root s=13 TeV

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    Results are presented from a search for the direct electroweak production of charginos and neutralinos in signatures with either two or more leptons (electrons or muons) of the same electric charge, or with three or more leptons, which can include up to two hadronically decaying tau leptons. The results are based on a sample of protonproton collision data collected at p s = 13TeV, recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 35.9 fb1. The observed event yields are consistent with the expectations based on the standard model. The results are interpreted in simpli ed models of supersymmetry describing various scenarios for the production and decay of charginos and neutralinos. Depending on the model parameters chosen, mass values between 180GeV and 1150 GeV are excluded at 95% CL. These results signi cantly extend the parameter space probed for these particles in searches at the LHC. In addition, results are presented in a form suitable for alternative theoretical interpretations.Sponsoring Consortium for Open Access Publishing in Particle Physic

    Revista Red GRID edición 2

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    En primer lugar, deseo felicitar a los estudiantes que han desarrollado la iniciativa de hacer esta revista a partir del trabajo en la asignatura Taller de Diseño Editorial en colaboración con los miembros del Club de Diseño Editorial Red Grid. Tanto el proyecto de la revista como el desarrollo del club son iniciativas de formación complementaria en las que los estudiantes tienen la posibilidad de desarrollar competencias y habilidades personales, interpersonales y profesionales. Vale la pena resaltar que hoy en día, un buen profesional no solo es capaz de entender temáticas relacionadas con su profesión mediante un proceso lógico de pensamiento, de resolver problemas profesionales basados en el conocimiento aprendido y de proponer desarrollos innovativos en áreas de aplicación de su conocimiento, lo cual ya es bastante. Adicionalmente, hoy en día se requiere que un profesional haya desarrollado competencias personales e interpersonales muy diversas, como la autonomía, el manejo del tiempo, el trabajo en equipo, la capacidad para atender múltiples frentes simultáneamente, ser capaz de asumir y hacer frente a la presión que el trabajo puede generar, etc. Sin estas competencias al profesional le resultará muy complicado poder aplicar su conocimiento en distintos contextos. Por Alberto De Castro Correa Vicerrector Académico Universidad del Nort

    Mexican Asthma Guidelines: GUIMA 2017

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    Background: The need for a national guideline, with a broad basis among specialists and primary care physicians was felt in Mexico, to try unifying asthma management. As several high-quality asthma guidelines exist worldwide, it was decided to select the best three for transculturation. Methods: Following the internationally recommended methodology for guideline transculturation, ADAPTE, a literature search for asthma guidelines, published 1-1-2007 through 31-12-2015 was conducted. AGREE-II evaluations yielded 3/40 most suitable for transculturation. Their compound evidence was fused with local reality, patient preference, cost and safety considerations to draft the guideline document. Subsequently, this was adjusted by physicians from 12 national medical societies in several rounds of a Delphi process and 3 face-to-face meetings to reach the final version. Results: Evidence was fused from British Thoracic Society Asthma Guideline 2014, Global Initiative on Asthma 2015, and Guía Española del Manejo del Asma 2015 (2016 updates included). After 3 Delphi-rounds we developed an evidence-based document taking into account patient characteristics, including age, treatment costs and safety and best locally available medication. Conclusion: In cooperation pulmonologists, allergists, ENT physicians, paediatricians and GPs were able to develop an evidence-based document for the prevention, diagnosis and treatment of asthma and its exacerbations in Mexico
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