Transit performance and quality of service indicators for transit services for students to the Universidad de Costa Rica

Se presenta la aplicación de una metodología para la evaluación de un sistema de transporte público, modalidad autobús. En la evaluación se aplican tanto indicadores de desempeño como indicadores relacionados con la calidad del servicio para analizar la movilidad de estudiantes y del personal de la sede Rodrigo Facio de la Universidad de Costa Rica (UCR) que utilizan el servicio especial de autobuses de la universidad conocido como buses externos UCR. Más de una tercera parte de los viajes al centro académico se realizan por medio del servicio especial de autobuses; lo que implica que la calidad de la movilidad de más de 10 mil personas por día depende de este servicio. La información del desempeño y calidad de servicio del sistema de transporte público es elemental para futuros planes maestros de movilidad en la universidad. En un día promedio entre semana se realizan más de 350 viajes en autobús (bus externo UCR), incluyendo viajes de salida y llegada a la Sede Rodrigo Facio por lo que se debe ofrecer un transporte público capaz de atraer nuevos usuarios y así contribuir a generar un ambiente agradable y saludable. Se lograron identificar los aspectos que más aquejan al usuario. La aplicación de la metodología permitió evaluar el sistema a través de diferentes indicadores de desempeño a partir de información disponible. Finalmente, dentro de los principales hallazgos se encuentran posibles nuevas rutas y una lista de medidas para mejorar la calidad del servicio, de acuerdo a la importancia dada por los usuarios.This paper presents a methodology to evaluate an university bus transit service. Both performance and quality of service indicators were applied in the system evaluation to analyze the mobility of students and staff at the main campus Rodrigo Facio of the University of Costa Rica (UCR), who daily commute using a special bus transit service. Over one third of the total trips to the campus are made by this special bus transit service provided by the university; which implies that the quality of the mobility of more than 10 thousand people depends on this service. Information related to the performance and quality of service of the bus transit system is a fundamental input for future university transportation master plans. On an average weekday more than 350 trips are made by the exclusive bus transit service, including trips that depart and arrive to the main campus Rodrigo Facio; therefore the need to offer a high-quality service in order to increase ridership, and thus, to help to generate a more pleasant and healthier environment. Relevant issues that affect users were identified. Also, the methodology was applied to assess the system through different performance indicators. Finally, the main findings include potential new bus transit routes and a list of countermeasures, ranked according to the priority given by the users to improve the quality of the service.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ingeniería::Laboratorio Nacional de Materiales y Modelos Estructurales (LanammeUCR

PATOLOGIA DO QUADRIL DAS CRIANÇAS: UMA REVISÃO INTEGRATIVA

Many of the pathologies that affect the hip in adults have their origins in childhood, making the early diagnosis of these conditions through specific pediatric orthopedic evaluation extremely important. Research shows that late diagnoses are associated with a considerable increase in the number of sequelae. This article consists of an integrative review, which aims to analyze and discuss the main hip pathologies in children, in order to expand the knowledge of students and professionals in the area about the subject in question. The work consists of an integrative literature review, in which a basic, qualitative, exploratory and bibliographic research was carried out in the databases. Hip pathology in children is a field of medical study and treatment that encompasses a variety of conditions and problems that affect the hip joint in younger individuals. These conditions can range from congenital problems to disorders acquired over time. It is critical to understand that healthy hip development is crucial for children's mobility and quality of life, and any issues in this area must be addressed with care and attention. In summary, hip pathologies in children encompass a variety of conditions, from developmental dysplasia of the hip to proximal epiphysis of the femur. Early diagnosis and adequate treatment are essential to avoid complications and long-term sequelae.Muitas das patologias que afetam o quadril de adultos têm suas origens na infância, tornando o diagnóstico precoce dessas condições por meio de avaliação ortopédica pediátrica específica de extrema importância. Pesquisas demonstram que diagnósticos tardios estão associados a um aumento considerável no número de sequelas. O presente artigo consiste em uma revisão integrativa, no qual tem como objetivo analisar e discutir acerca das principais patologias de quadril das crianças, no intuito de ampliar os conhecimentos de estudantes e profissionais da área acerca do tema em questão. O trabalho consiste em uma revisão de literatura do tipo integrativa, na qual foi realizada uma pesquisa dos tipos básica, qualitativa, exploratória e bibliográfica, nas bases de dados. A patologia do quadril em crianças é um campo de estudo e tratamento médico que abrange uma variedade de condições e problemas que afetam a articulação do quadril em indivíduos mais jovens. Essas condições podem variar desde problemas congênitos até distúrbios adquiridos ao longo do tempo. É fundamental entender que o desenvolvimento saudável do quadril é crucial para a mobilidade e a qualidade de vida das crianças e qualquer problema nessa área deve ser abordado com cuidado e atenção. Em suma, as patologias do quadril em crianças abrangem uma variedade de condições, desde a displasia do desenvolvimento do quadril até a epifisiólise proximal do fêmur. O diagnóstico precoce e o tratamento adequado são fundamentais para evitar complicações e sequelas a longo prazo

A epidemiologia da cardiomiopatia de Takotsubo no Brasil e os principais fatores de risco da cardiomiopatia de Takotsubo: The epidemiology of Takotsubo cardiomyopathy in Brazil and the main risk factors for takotsubo cardiomyopathy

A Cardiomiopatia de Takotsubo (CTT) é uma disfunção cardíaca reversível, a qual está relacionada, diretamente, ao estresse físico ou emocional. Objetiva-se através dessa pesquisa evidenciar os principais fatores de risco da CT. Trata-se de uma revisão sistemática realizada no motor de busca Biblioteca Virtual em Saúde (BVS) na base de dados das “Ciências em Saúde em Geral” (Scielo, Medline, Lilacs). Percebeu-se que que a CT apresenta uma ocorrência maior em mulheres na fase de pós-menopausa, onde são atingidas pelo estresse emocional, bem como a inserção de marcapasso também pode desencadear a doença. Entretanto, a etiologia da CT ainda é marcada por controvérsias, mas há concordância acerca do surgimento da CT estar relacionado com a abundância de catecolaminas circulantes

Global urban environmental change drives adaptation in white clover.

Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban-rural gradients were associated with the evolution of clines in defense in 47% of cities throughout the world. Variation in the strength of clines was explained by environmental changes in drought stress and vegetation cover that varied among cities. Sequencing 2074 genomes from 26 cities revealed that the evolution of urban-rural clines was best explained by adaptive evolution, but the degree of parallel adaptation varied among cities. Our results demonstrate that urbanization leads to adaptation at a global scale

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

Impacts of the Tropical Pacific/Indian Oceans on the Seasonal Cycle of the West African Monsoon

The current consensus is that drought has developed in the Sahel during the second half of the twentieth century as a result of remote effects of oceanic anomalies amplified by local land–atmosphere interactions. This paper focuses on the impacts of oceanic anomalies upon West African climate and specifically aims to identify those from SST anomalies in the Pacific/Indian Oceans during spring and summer seasons, when they were significant. Idealized sensitivity experiments are performed with four atmospheric general circulation models (AGCMs). The prescribed SST patterns used in the AGCMs are based on the leading mode of covariability between SST anomalies over the Pacific/Indian Oceans and summer rainfall over West Africa. The results show that such oceanic anomalies in the Pacific/Indian Ocean lead to a northward shift of an anomalous dry belt from the Gulf of Guinea to the Sahel as the season advances. In the Sahel, the magnitude of rainfall anomalies is comparable to that obtained by other authors using SST anomalies confined to the proximity of the Atlantic Ocean. The mechanism connecting the Pacific/Indian SST anomalies with West African rainfall has a strong seasonal cycle. In spring (May and June), anomalous subsidence develops over both the Maritime Continent and the equatorial Atlantic in response to the enhanced equatorial heating. Precipitation increases over continental West Africa in association with stronger zonal convergence of moisture. In addition, precipitation decreases over the Gulf of Guinea. During the monsoon peak (July and August), the SST anomalies move westward over the equatorial Pacific and the two regions where subsidence occurred earlier in the seasons merge over West Africa. The monsoon weakens and rainfall decreases over the Sahel, especially in August.Peer reviewe

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

Peer reviewe

An embedding technique to determine ττ backgrounds in proton-proton collision data

An embedding technique is presented to estimate standard model tau tau backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed mu mu events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at root s = 13 TeV corresponding to an integrated luminosity of 41.5 fb(-1).Peer reviewe

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

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

Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV

A measurement of the top quark-antiquark pair production cross section sigma(t (t) over bar) in proton-proton collisions at a centre-of-mass energy of 13 TeV is presented. The data correspond to an integrated luminosity of 35.9 fb(-1), recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e(+/-) mu(-/+), mu(+) mu(-), e(+) e(-)) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of m(t)(MC) = 172.5 GeV the fit yields a measured cross section sigma(t (t) over bar) = 803 +/- 2 (stat) +/- 25 (syst) +/- 20 (lumi) pb, in agreement with the expectation from the standard model calculation at next-to-next-to-leading order. A simultaneous fit of the cross section and the top quark mass parameter in the POWHEG simulation is performed. The measured value of m(t)(MC) = 172.33 +/- 0.14 (stat)(-0.72)(+0.66) (syst) GeV is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions.Peer reviewe