2,199 research outputs found

    Centro recreativo y deportivo Jipijapa arquitectura, ritmo y secuencia.

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    The final Project is based on the necessity of the citizenship of Quito, which requires a space for the development and physical and mental performance, that a series of activities reunites, exercises and sports. Promoting values like the responsibility, the discipline, the commitment, the property, the identity and the overcoming of the citizen. The “Centro Recreativo y Deportivo Jipijapa” it will offer spaces, sport areas, recreational areas, cycle routes, pedestrian footpaths of trot and runners who interact and connect with the different services and equipment of the sector, Who developed physical activities to fortify their integral formation.El Proyecto de Fin de Carrera se basa en la necesidad de la ciudadanía de Quito, la cual requiere un espacio para el desarrollo y desempeño físico y mental, que reúna una serie de actividades, ejercicios y deportes para el ejercitamiento, promoviendo valores como la responsabilidad, la disciplina, el compromiso, la pertenencia, la identidad y la superación del ciudadano. El Centro Recreativo y Deportivo Jipijapa de Quito ofrecerá espacios, áreas deportivas, áreas recreacionales, ciclo rutas, senderos de trote y corredores peatonales que interactúen y conecten con los diferentes servicios y equipamientos del sector, los cuales serán la herramienta para el usuario, sea el deportista, personas de la tercera edad, estudiantes, trabajadores , amas de casa, entre otros. Quienes desarrollaran actividades físicas para fortalecer su formación integral

    Parametrized spectra, multiplicative Thom spectra, and the twisted Umkehr map

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    We introduce a general theory of parametrized objects in the setting of infinity categories. Although spaces and spectra parametrized over spaces are the most familiar examples, we establish our theory in the generality of objects of a presentable infinity category parametrized over objects of an infinity topos. We obtain a coherent functor formalism describing the relationship of the various adjoint functors associated to base-change and symmetric monoidal structures. Our main applications are to the study of generalized Thom spectra. We obtain fiberwise constructions of twisted Umkehr maps for twisted generalized cohomology theories using a geometric fiberwise construction of Atiyah duality. In order to characterize the algebraic structures on generalized Thom spectra and twisted (co)homology, we characterize the generalized Thom spectrum as a categorification of the well-known adjunction between units and group rings.Comment: Submission draft. Various changes, including rewrite in terms of infinity topoi and corrected discussion of functoriality of Atiyah dualit

    Metabolic Bone Disease of Infancy in the Offspring of Mothers With Bariatric Surgery: A Series of 5 Infants in Contested Cases of Child Abuse

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    Background and aims: Metabolic Bone Disease of Infancy is a multifactorial disorder of bone fragility in infants who typically present under 6 months of age with multiple unexplained fractures. Major risk factors for this disorder relate to the fetal time period and include decreased provision of the essential nutrients for bone formation during pregnancy (calcium, phosphate, vitamin D, and protein), prema- turity, and decreased fetal bone loading. Methods: This study presents 5 infants with multiple unexplained fractures born to women who had prior bariatric surgery in which child abuse was alleged, and the alleged perpetrator denied wrong doing. Results: The radiographic findings showed poor bone mineralization and were consistent with Metabolic Bone Disease of Infancy. Conclusions: Using the Utah Paradigm to understand risk factors for MBDI, the authors believe the nutritional deficiencies that accompany bariatric surgery likely contribute to the bone fragility in these 5 infants. Other risk factors for MBDI were appreciated in 4 of the 5 cases. 1,25 dihydroxyvitamin D was elevated or high-normal suggesting calcium deficiency in 2 cases. We believe infants born to mothers who have had prior bariatric surgery are at increased risk for bone fragility and MBDI during the first 6 months of life

    Concepts for radically increasing the numerical convergence rate of the Euler equations

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    Integral equation and finite difference methods have been developed for solving transonic flow problems using linearized forms of the transonic small disturbance and Euler equations. A key element is the use of a strained coordinate system in which the shock remains fixed. Additional criteria are developed to determine the free parameters in the coordinate straining; these free parameters are functions of the shock location. An integral equation analysis showed that the shock is located by ensuring that no expansion shocks exist in the solution. The expansion shock appears as oscillations in the solution near the sonic line, and the correct shock location is determined by removing these oscillations. A second objective was to study the ability of the Euler equation to model separated flow

    Exploration via linearly perturbed loss minimisation

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    We introduce exploration via linear loss perturbations (EVILL), a randomised exploration method for structured stochastic bandit problems that works by solving for the minimiser of a linearly perturbed regularised negative log-likelihood function. We show that, for the case of generalised linear bandits, EVILL reduces to perturbed history exploration (PHE), a method where exploration is done by training on randomly perturbed rewards. In doing so, we provide a simple and clean explanation of when and why random reward perturbations give rise to good bandit algorithms. With the data-dependent perturbations we propose, not present in previous PHE-type methods, EVILL is shown to match the performance of Thompson-sampling-style parameter-perturbation methods, both in theory and in practice. Moreover, we show an example outside of generalised linear bandits where PHE leads to inconsistent estimates, and thus linear regret, while EVILL remains performant. Like PHE, EVILL can be implemented in just a few lines of code

    Reconstruction of hydrometric data using a network optimization model

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    Water resource managers need to implement precise and efficient water management methods particularly in the context of low flow water management. The management objectives are complex because managers must satisfy both water demands for human activities and environmental goals. More often the flow objectives are defined at specific strategic points in which hydrometric stations are based. In order to allow the manager to better understand the hydrographical network behavior, in particular for inter-basin water transfer, these strategic hydrometric stations must be reinforced by some intermediate hydrometric stations, by modeling the network behavior, and by introducing weather forecast data in order to simulate the evolution in time and space of the river. For an efficient management, it is essential that the data collected and the output of the models (the natural flow and the withdrawals) must be reliable. For this purpose, a network optimization model was developed for analyzing the consistency of the available data set (measurements and model outputs) on a hydraulic system. Herein, a reconstruction of hydrometric data using this network optimization model is applied to the Arrats watershed management

    Etude de l'extension du régime de combustion sans flamme aux mélanges Méthane/Hydrogène et aux environnements à basse température

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    La combustion sans flamme est un régime de combustion massivement dilué associant forte efficacité énergétique et très faibles émissions polluantes dans les fours industriels. La composition du combustible et la température des parois de la chambre de combustion sont deux paramètres très influents de ce régime. Dans de précédents travaux menés au CORIA, l étude du régime de combustion sans flamme des mélanges méthane-hydrogène à 18% d excès d air a mené à des résultats originaux et prometteurs. D autre part, la haute température des parois s est avérée un élément primordial pour la stabilisation de la combustion sans flamme. Dans le cadre du projet CANOE en collaboration avec GDF SUEZ et l ADEME, cette thèse a pour objectif, d une part de compléter l étude de l extension de ce régime à des mélanges méthane-hydrogène pour des conditions opératoires plus proches des conditions classiques de fonctionnement de brûleurs (10% d excès d air), et d autre part, d'étudier les problèmes de stabilité de la combustion sans flamme en environnement à basse température pour envisager son application à des configurations de type chaudière industrielle.Sur le four pilote à hautes températures de parois du CORIA, l ajout de l hydrogène dans le combustible a permis de garder le régime de combustion sans flamme pour toutes les proportions méthane - hydrogène avec très peu d émissions polluantes. Une augmentation de l excès d air est toutefois nécessaire pour certaines conditions opératoires. Les expériences réalisées avec abaissement progressif de la température des parois ont permis d étudier l influence de celle-ci sur le développement de la combustion sans flamme, et d atteindre les limites de stabilité de ce régime. Des résultats similaires sont obtenus sur une installation semi-industrielle de GDF SUEZ. L ajout d hydrogène rend la combustion sans flamme moins sensible à l abaissement de la température de parois. Une étude analytique de jets turbulents confinés a été développée pour représenter l'interaction entre les jets de réactifs et leur environnement dans la chambre de combustion permettant d'atteindre le régime de combustion sans flamme par entraînement, dilution et préchauffage. Ce modèle nous a permis d établir une étude systématique permettant de mettre en valeur l effet de chaque paramètre sur le développement des jets dans l enceinte, et ainsi servir de moyen de pré-dimensionnement de brûleur à combustion sans flamme. L'apport de chaleur nécessaire à la stabilisation à basse température a ainsi été estimé. Sur cette base, un brûleur adapté aux configurations à parois froides a été dimensionné et fabriqué. L applicabilité de la combustion sans flamme avec ce brûleur dans une chambre de combustion à parois froides, spécialement conçue et fabriquée dans cet objectif au cours de cette thèse, a été étudiée. Un régime de combustion diluée à basses températures a pu être stabilisé, mais le fort taux d'imbrûlés produits en sortie reste à réduire.Mild flameless combustion is a massively diluted combustion regime associating high energy efficiency and very low pollutant emissions from industrial furnaces. The fuel composition and walls temperature are two very influential parameters of this combustion regime. In previous works realized at CORIA, flameless combustion of methane - hydrogen mixtures at 18% of excess air has shown very promising results. In another hand, high walls temperature is an essential element for flameless combustion stabilization. Within the framework of the project CANOE in collaboration with GDF SUEZ and ADEME, the objective of this PhD thesis is to complete the study of flameless combustion for methane-hydrogen mixtures in operating conditions similar to classical operating conditions of burners (10% of excess air), and in another hand, to study the stability limits of this combustion regime in low temperature environment like in industrial boiler.Experiments realized on the CORIA high temperature pilot facility, have proved that hydrogen addition in the fuel keep flameless combustion regime stable for all methane - hydrogen proportions, with very ultra-low pollutant emissions. An increase of excess air is however necessary for some operating conditions.Experiments realized with wall temperature progressive decrease allowed to study the influence of this parameter on flameless combustion, and to reach its stability limits. Similar results are obtained on the semi-industrial facility of GDF SUEZ. With hydrogen addition, flameless combustion is less sensitive to wall temperature decrease. An analytical representation of confined turbulent jets has been then developed to represent interaction between the reactant jets and their environment in the combustion chamber allowing reaching fameless combustion regime by entrainment, dilution and preheating. The effect of each parameter on the development of the jets can be then studied, which can be used as convenient tool of flameless combustion burners design. The heat quantity necessary for the low wall temperature stabilization has been quantified. On this base, a burner adapted to the configurations with cold walls has been designed. The applicability of the flameless combustion with this burner has been studied in a combustion chamber with low wall temperature specially designed for this purpose during this thesis. A mild diluted combustion regime has been achieved, but the high levels of unburnt gases have to be reduced.ROUEN-INSA Madrillet (765752301) / SudocSudocFranceF
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