Evaluación comparativa de las características físicas y comportamiento mecánico de una mezcla asfáltica en caliente adicionada con polietileno de alta densidad (HDPE) reciclado con respecto a una muestra patrón utilizando cemento asfaltico pen 85/100, con agregados de la Región Cusco2022

La presente investigación “EVALUACIÓN COMPARATIVA DE LAS CARACTERÍSTICAS FÍSICAS Y COMPORTAMIENTO MECÁNICO DE UNA MEZCLA ASFÁLTICA EN CALIENTE ADICIONADA CON POLIETILENO DE ALTA DENSIDAD (HDPE) RECICLADO CON RESPECTO A UNA MUESTRA PATRÓN UTILIZANDO CEMENTO ASFALTICO PEN 85/100, CON AGREGADOS DE LA REGION CUSCO-2022” tiene como objetivo principal realizar un análisis comparativo mediante ensayos de las características físicas y comportamiento mecánico ( Densidad, Porcentaje de vacíos, Estabilidad, Flujo y Daño inducido por humedad) de una mezcla asfáltica convencional frente a una mezcla asfáltica adicionada con polietileno de alta densidad (HDPE) reciclado, haciendo uso de agregados de la región cusco y cemento asfáltico (PEN 85/100) proveniente de la planta de asfalto de COPESCO de la región Cusco. Se realizó el control de calidad de los agregados mediante ensayos normalizados por el Manual de ensayo de Materiales, Manual de Especificaciones Técnicas Generales para Construcción de Carreteras EG-2013 y el Reglamento Nacional de Edificaciones CE.010 de Pavimentos Urbanos, para luego diseñar una mezcla asfáltica en caliente y determinar su contenido óptimo de asfalto mediante el diseño Marshall para mezclas asfálticas en caliente, considerando 6 porcentajes (4.0%, 4.5%, 5.0%, 5.5%, 6.0% y 6.5%) respecto al peso total de la mezcla; una vez determinado el contenido óptimo de cemento asfáltico se procedió a determinar el contenido óptimo de polietileno de alta densidad (HDPE) reciclado utilizando 6 porcentajes (1.0%, 2.0%, 3.0%, 4.0%, 5.0% y 6.0%) respecto al peso total de la mezcla. Para una mejor evaluación comparativa, realizamos mezclas asfálticas en caliente adicionales con 4 porcentajes de cemento asfaltico (5.50%, 6.0%, 6.5% y 7.0%) añadiéndole polietileno de alta densidad (HDPE) reciclado en los 6 porcentajes ya mencionados, teniendo en cuenta que los 4 porcentajes de cemento asfálticos fueron tomados en función del porcentaje óptimo de cemento asfáltico determinado (6.33%). Finalmente se realizó el análisis comparativo entre la mezcla asfáltica en caliente convencional y la mezcla asfáltica en caliente adicionada con polietileno de alta densidad (HDPE) reciclado en sus porcentajes óptimos, concluyendo que respecto a la estabilidad Marshall se tiene un incremento de 123.845 kg y respecto al daño inducido por humedad presenta una mejora de 5.7% en el porcentaje de TSR. Sin embargo, respecto a la densidad no se presenta incremento por lo cual no se tendría mayor rendimiento de duración, respecto al porcentaje de vacíos se tiene un incremento de 0.405 gr/cm3 que se encuentra dentro del parámetro establecido y respecto al flujo Marshall se presenta un incremento de 0.307 mm por lo cual no cumple con los requerimientos del Manual de Carreteras “Especificaciones Generales para la Construcción EG-2013”. Además, se concluyó también que al adicionar polietileno de alta densidad (HDPE) reciclado a mezclas asfálticas de 5.5% y 6.0% de cemento asfáltico, cumplen con algunos requerimientos establecidos pero las mezclas asfálticas de 6.5% y 7.0% de cemento asfáltico no cumplen con las verificaciones de gravedad por lo cual no se consideró en las comparaciones.The present research "COMPARATIVE EVALUATION OF THE PHYSICAL CHARACTERISTICS AND MECHANICAL BEHAVIOR OF A HOT ASPHALTIC MIX ADDED WITH RECYCLED HIGH DENSITY POLYETHYLENE (HDPE) WITH RESPECT TO A PATTERN SAMPLE USING ASPHALTIC CEMENT PEN 85/100, WITH AGGREGATES FROM THE CUSCO REGION-2022" has as main objective to carry out a comparative analysis by means of tests of the physical characteristics and mechanical behavior (Density, Percentage of voids, stability, flow and moisture induced damage) of a conventional asphalt mix versus an asphalt mix added with recycled high density polyethylene (HDPE), using aggregates from the Cusco region and asphalt cement (PEN 85/100) from the COPESCO asphalt plant in the Cusco region. Quality control of the aggregates was carried out by means of standardized tests according to the Materials Testing Manual, the General Technical Specifications Manual for Road Construction EG-2013 and the National Building Regulation CE.010 of Urban Pavements, to then design a hot asphalt mix and determine its optimum asphalt content by means of the Marshall design for hot asphalt mixes, considering 6 percentages (4.0%, 4.5%, 5.0%, 5.5%, 6.0% and 6. Once the optimum asphalt cement content was determined, the optimum recycled high-density polyethylene (HDPE) content was determined using 6 percentages (1.0%, 2.0%, 3.0%, 4.0%, 5.0% and 6.0%) with respect to the total weight of the mixture. For a better comparative evaluation, we made additional hot asphalt mixtures with 4 percentages of asphalt cement (5.50%, 6.0%, 6.5% and 7.0%) adding recycled high density polyethylene (HDPE) in the 6 percentages already mentioned, taking into account that the 4 percentages of asphalt cement were taken based on the optimal percentage of asphalt cement determined (6.33%). Finally, a comparative analysis was made between the conventional hot mix asphalt and the hot mix asphalt added with recycled high-density polyethylene (HDPE) in its optimum percentages, concluding with respect to Marshall stability, there is an improvement of 123.845 kg and with respect to moisture-induced damage, there is an improvement of 5.7% in the percentage of TSR. However, with respect to the density, there is no increase in the percentage of TSR, so there would not be a higher durability performance, with respect to the percentage of voids, there is an increase of 0.405 gr/cm3 which is within the established parameter and with respect to the Marshall flow, there is an increase of 0.307 mm, so it does not meet the requirements of the Highway Manual "General Specifications for Construction EG-2013". In addition, it was also concluded that by adding recycled high-density polyethylene (HDPE) to asphalt mixtures of 5.5% and 6.0% of asphalt cement, they comply with some established requirements, but the asphalt mixtures of 6.5% and 7.0% of asphalt cement do not comply with the gravity verifications, so it was not considered in the comparisons

New England Medical Center Posterior Circulation Stroke Registry: I. Methods, Data Base, Distribution of Brain Lesions, Stroke Mechanisms, and Outcomes

Among 407 New England Medical Center Posterior Circulation Registry (NEMC-PCR) patients, 59% had strokes without transient ischemic attacks (TIAs), 24% had TIAs before strokes, and 16% had only posterior circulation TIAs. Embolism was the commonest stroke mechanism accounting for 40% of cases (24% cardiac origin, 14% arterial origin, 2% had potential cardiac and arterial sources). In 32%, large artery occlusive lesions caused hemodynamic brain infarction. Stroke mechanisms in the posterior and anterior circulation are very similar. Infarcts most often included the distal posterior circulation territory (rostral brainstem, superior cerebellum and occipital and temporal lobes), while the proximal (medulla and posterior inferior cerebellum) and middle (pons and anterior inferior cerebellum) territories were equally involved. Infarcts that included the distal territory were twice as common as those that included the proximal or middle territories. Most distal territory infarcts were attributable to embolism. Thirty day mortality was low (3.6%). Embolic stroke mechanism, distal territory location, and basilar artery occlusive disease conveyed the worst prognosis

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

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

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

Forward-central two-particle correlations in p-Pb collisions at root s(NN)=5.02 TeV

Two-particle angular correlations between trigger particles in the forward pseudorapidity range (2.5 2GeV/c. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B. V.Peer reviewe

Event-shape engineering for inclusive spectra and elliptic flow in Pb-Pb collisions at root(NN)-N-S=2.76 TeV

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

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Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

Measurement of t(t)over-bar normalised multi-differential cross sections in pp collisions at root s=13 TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

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