197 research outputs found
“IDENTIDAD CULTURAL DE LOS REPRESENTANTES DE LOS GREMIOS DE CULTURA Y TURISMO DEL DISTRITO DE SAN JUAN DE LURIGANCHO, 2016”
La presente investigaciĂłn es de tipo cuantitativa, donde el objetivo fue identificar el nivel de la identidad cultural que poseen los representantes de los gremios de cultura y turismo del distrito de San Juan de Lurigancho.
La técnica e instrumento de recolección de datos fueron la encuesta respectiva y el cuestionario; Concluyendo con los resultados del procesamiento de datos, en los cuales se pudo verificar un 93,1% de regular nivel de identidad cultural de los representantes de los gremios encuestados, mientras que un 6,9% presentó un buen nivel de Identidad Cultural
Thickness dependence of the switching voltage in all-oxide ferroelectric thin-film capacitors prepared by pulsed laser deposition
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Prediction of Corrosion of Advanced Materials and Fabricated Components
The goal of this project is to provide materials engineers, chemical engineers and plant operators with a software tool that will enable them to predict localized corrosion of process equipment including fabricated components as well as base alloys. For design and revamp purposes, the software predicts the occurrence of localized corrosion as a function of environment chemistry and assists the user in selecting the optimum alloy for a given environment. For the operation of existing plants, the software enables the users to predict the remaining life of equipment and help in scheduling maintenance activities. This project combined fundamental understanding of mechanisms of corrosion with focused experimental results to predict the corrosion of advanced, base or fabricated, alloys in real-world environments encountered in the chemical industry. At the heart of this approach is the development of models that predict the fundamental parameters that control the occurrence of localized corrosion as a function of environmental conditions and alloy composition. The fundamental parameters that dictate the occurrence of localized corrosion are the corrosion and repassivation potentials. The program team, OLI Systems and Southwest Research Institute, has developed theoretical models for these parameters. These theoretical models have been applied to predict the occurrence of localized corrosion of base materials and heat-treated components in a variety of environments containing aggressive and non-aggressive species. As a result of this project, a comprehensive model has been established and extensively verified for predicting the occurrence of localized corrosion as a function of environment chemistry and temperature by calculating the corrosion and repassivation potentials.To support and calibrate the model, an experimental database has been developed to elucidate (1) the effects of various inhibiting species as well as aggressive species on localized corrosion of nickel-base alloys, stainless steels and copper-nickel alloys and (2) the effects of heat treatment on localized corrosion. Excellent agreement with experimental data has been obtained for alloys in various environments, including acids, bases, oxidizing species, inorganic inhibitors, etc. Further, a probabilistic model has been established for predicting the long-term damage due to localized corrosion on the basis of short-term inspection results. This methodology is applicable to pitting, crevice corrosion, stress corrosion cracking and corrosion fatigue. Finally, a comprehensive model has been developed for predicting sensitization of Fe-Ni-Cr-Mo-W-N alloys and its effect on localized corrosion. As a vehicle for the commercialization of this technology, OLI Systems has developed the Corrosion Analyzer, a software tool that is already used by many companies in the chemical process industry. In process design, the Corrosion Analyzer provides the industry with (1) reliable prediction of the tendency of base alloys for localized corrosion as a function of environmental conditions and (2) understanding of how to select alloys for corrosive environments. In process operations, the software will help to predict the remaining useful life of equipment based on limited input data. Thus, users will also be able to identify process changes, corrosion inhibition strategies, and other control options before costly shutdowns, energy waste, and environmental releases occur. With the Corrosion Analyzer, various corrosion mitigation measures can be realistically tested in a virtual laboratory
Preparation of Highly Crystalline TiO2 Nanostructures by Acid-assisted Hydrothermal Treatment of Hexagonal-structured Nanocrystalline Titania/Cetyltrimethyammonium Bromide Nanoskeleton
Highly crystalline TiO2 nanostructures were prepared through a facile inorganic acid-assisted hydrothermal treatment of hexagonal-structured assemblies of nanocrystalline titiania templated by cetyltrimethylammonium bromide (Hex-ncTiO2/CTAB Nanoskeleton) as starting materials. All samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The influence of hydrochloric acid concentration on the morphology, crystalline and the formation of the nanostructures were investigated. We found that the morphology and crystalline phase strongly depended on the hydrochloric acid concentrations. More importantly, crystalline phase was closely related to the morphology of TiO2 nanostructure. Nanoparticles were polycrystalline anatase phase, and aligned nanorods were single crystalline rutile phase. Possible formation mechanisms of TiO2 nanostructures with various crystalline phases and morphologies were proposed
Synthesis of advanced ceramics by hydrothermal crystallization and modified related methods
Nanocrystalline Mesoporous Strontium Titanate as Photoelectrode Material for Photosensitized Solar Devices: Increasing Photovoltage through Flatband Potential Engineering
Béatrice Parance, "Définition européenne des perturbateurs endocriniens : un progrès ?", D., 2017, n° 30, p. 1752-1753.
Compte-rendu de revu
EU's values control under the scope of article 7 TEU
Depuis le milieu des années 2000, et encore plus depuis 2017, l'Union fait face à ce qui est souvent qualifié d'une crise de l’État de droit. Cette crise fragilise l'Union car elle rend plus complexe l'intégration et l'accomplissement de certaines compétences de l'Union, telle que la coopération judiciaire.En effet, la confiance entre les États membres est en partie fondée sur le partage de valeurs communes. Pour veiller à ce respect des valeurs, un dispositif a été introduit dans le Traité depuis le Traité d'Amsterdam (1997) : l'article 7 TUE. Cet article peut être décomposé en deux mécanismes : l'un de contrôle politique, l'autre de suivi politique. Le contrôle politique, qui peut permettre de sanctionner l’État concerné, n'a encore jamais été utilisé. Le suivi politique, qui permet d'émettre des recommandations et de constater un risque grave pour les valeurs, a été activé deux fois depuis 2017, contre la Pologne, puis la Hongrie. Il faut constater l'absence de conséquences de ces activations, et ainsi analyser l'article 7 TUE à l'aune de ses failles.Etudier le contrôle politique du respect des valeurs de l'Union met face à une incertitude quant au contenu des valeurs comme objet de contrôle. Si celles-ci peuvent être circonscrites, elles ne peuvent l'être qu'en synergie avec le reste du droit de l'Union et en tenant compte des traditions nationales et du droit du Conseil de l'Europe. L'objet du contrôle n'apparait donc pas comme le principal enjeu pour le contrôle politique. De fait, les lacunes de l'article 7 TUE ont permis le développement d'outils alternatifs de suivi et de contrôle, sans doute plus adaptés aux besoins spécifiques de l'Union. En effet, pour une intégration sans cesse plus étroite, la confiance doit être rétablie rapidement, ce qui tend à expliquer les limites de l'article 7 TUE.Since the mid-2000s, and even more since 2017, the Union has been facing what is often described as a "rule of law backsliding". It weakens the Union because it makes the integration and fulfilment of certain Union competences, such as judicial cooperation, more complex.Indeed, trust between Member States is partly based on shared values. To ensure that these values are respected, a mechanism has been introduced into the Treaty since the Treaty of Amsterdam (1997): Article 7 TEU. This article can be broken down into two mechanisms: one of political control, the other of political monitoring. Political control, which can be used to sanction the state concerned, has never been used before. Political monitoring, which allows recommendations to be made and a serious risk to values to be identified, has been activated twice since 2017, against Poland and then Hungary. The lack of consequences of these activations should be noted, and thus Article 7 TEU should be analysed in terms of its flaws.Studying the political control of the respect of the Union's values leads to uncertainty as to the content of the values as an object of control. If they can be defined, they can only be defined in synergy with the rest of Union law and with due regard for national traditions and Council of Europe law. The subject matter of the review does not therefore appear to be the main issue for political review. In fact, the shortcomings of Article 7 TEU have made it possible to develop alternative monitoring and control tools, which are undoubtedly better suited to the specific needs of the Union. Indeed, for ever closer integration, trust must be restored quickly, which tends to explain the limitations of Article 7 TEU
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