8 research outputs found

    Reglas de combinación de los efectos de las tres componentes de terremotos y respuesta crítica

    Get PDF
    La precisión de las reglas de combinación del 30% y SRSS, y la orientación crítica de las componentes de terremotos se estudian en este trabajo. Se analizan modelos estructurales complejos que representan edificios de baja y mediana altura. Se realiza un análisis estadístico de la precisión de las reglas de combinación aplicadas a parámetros de respuesta individuales y múltiples. El efecto de la correlación entre las componentes de los terremotos en dicha precisión también se estudia. Finalmente, se realizan análisis con varios ángulos de incidencia de las componentes con la finalidad de encontrar la orientación crítica. Los resultados muestran que las reglas subestiman la carga axial en columnas, pero sobreestiman razonablemente los cortantes de entrepiso. Ambas reglas son más conservadoras cuando los modelos se excitan por las tres componentes. Los efectos individuales pueden estar altamente correlacionados, incluso para componentes principales no correlacionadas. Las reglas no siempre son precisas para valores pequeños de coeficientes de correlación, y valores altos de éstos no siempre están relacionados a una estimación imprecisa de la respuesta combinada. La precisión de las reglas de combinación depende del grado de correlación de las componentes, del parámetro de respuesta, de la localización del elemento considerado y del nivel de deformación estructural

    Application for dog walk

    Full text link
    El presente trabajo es enfocado en recreación para perros mediante el servicio de paseos a través de un aplicativo móvil. El problema encontrado por parte de los dueños de perros, es la carencia de tiempo para pasear a sus mascotas. En consecuencia se generan enfermedades psicosomáticas, como cardiopatías o úlceras en el largo plazo. Se pueden desarrollar problemas físicos, debido a que al estar estresado y ansioso. Tomando en cuenta esto, muchos dueños se animan por contratar a alguien que le brinde paseos y así combatir el estrés que le genera el aislamiento. Sin embargo, existe la falta de confianza sobre el paseador. Se ha propuesto como medidas de solución, permitir un programa de paseo individual o grupal para su mascota a la hora que. Asimismo, podrá realizar la reserva de un plan semanal. Además, el aplicativo contará con información fundamental acerca del paseador asignado, una breve reseña y comentarios sobre la calidad del servicio realizado anteriormente a otros usuarios. Se complementará con el uso de collares GPS con los que contarán nuestros paseadores y serán colocados a las mascotas durante el paseo. Contaremos con una estrategia de diferenciación en base a los siguientes factores variedad de servicios, seguridad, confianza del servicio, precio del servicio, calidad de servicio y medios de pago.The present work is focused on recreation for dogs through the service of walks through a mobile application. The problem encountered by dog owners is the lack of time to walk their pets. Consequently, psychosomatic diseases are generated, such as heart disease or ulcers in the long term. Physical problems can develop, because of being stressed and anxious. Considering this, many owners are encouraged to hire someone to provide rides and thus combat the stress generated by isolation. However, there is a lack of confidence about the walker. It has been proposed as solution measures, allow an individual or group walk program for your pet at the time. You can also make the reservation of a weekly plan. In addition, the application will have fundamental information about the assigned walker, a brief review and comments on the quality of the service previously performed to other users. It will be complemented with the use of GPS collars that our walkers will have and will be placed to the pets during the walk. We will have a differentiation strategy based on the following factors: variety of services, security, trust in the service, price of the service, quality of service and means of payment.Trabajo de investigació

    Franco-German diversities : intercultural and independent practices in foreign languages in teaching and learning

    Full text link
    La perspective actionnelle, institutionnalisée par le Cadre Européen Commun de Référence pour les Langues (CECRL), dite nouvelle méthodologie en enseignement-apprentissage des langues est en vogue, tant dans la sphère des prescriptions officielles que de la recherche. Cette thèse se propose d’interroger la construction de la compréhension de cette méthodologie, à l’épreuve des faits, en France (Académie de Lille) et en Allemagne (Land Hessen, Land Nordrhein-Westfalen), dans les pratiques et les discours d’enseignants du primaire (écoles élémentaires et Grundschule), à travers les concepts d’approche interculturelle et d’autonomie. Ces deux notions, en tant que points d’ancrage théoriques construits par et pour la recherche, sont définies en interrelation et interrogées avec un regard réflexif et critique ; elles sont notamment mises en débat avec l’approche culturaliste réifiante. Ces notions entrent en tensions avec les prescriptions officielles et les convictions des enseignants qui ont collaboré avec moi dans ce travail. La recherche se base sur le croisement de multiples données empiriques : focus groups d’enseignants, observations de classes en langues étrangères, entretiens d’enseignants, en France comme en Allemagne, écrits des prescriptions (programmes de langues) et écrits des recommandations (parcours de formation en ligne des dispositifs Pairform@nce et Intel Lehren Aufbaukurs Online). Les discours, toujours resitués en contextes, sont analysés au regard de théories de l’énonciation et du dialogisme. La thèse propose un point de vue critique des visions comparatistes différentialistes et donne à voir, en revanche, des résultats qui valorisent des diversités franco-allemandes pour construire la compréhension de l’objet de la recherche.The action-oriented approach which has been institutionalised by the Common European Framework of Reference for Languages (CEFR) is also called “the new methodology in the teaching and learning of languages”. It is widely used, both for official and for research purposes. This thesis aims to test and question the construction of understanding of this methodology both in France (the Educational Authority of Lille) and in Germany (Land Hessen, Land Nordrhein-Westfalen) by looking at the practices and discourses of primary school teachers (écoles élémentaires and Grundschule) through the concepts of both the intercultural and independent approaches. These notions, as well as being cornerstones constructed by and for the research, are defined by interrelation and questioned with a reflexive and critical mind-set. They are especially debated in opposition to the reifying culturalist approach. These notions strain against the official requirements and the beliefs of the teachers with whom I collaborated on this project. The research is based on the intersection of much empirical data from both France as well as Germany, for example: focus groups with teachers, observation of foreign language lessons, interviews with the teachers, literature detailing official requirements (language syllabuses) and literature detailing recommendations (the online training packages of Pairform@nce and Intel Lehren Aufbaukurs Online). The discourses, which have been placed into context, are analysed with regards to the theories of enunciation and dialogism. The thesis offers a critical perspective of comparative differentialist visions, yet allows a visualisation of the results that enhance the Franco-German diversities in order to build an understanding of the research objective

    Local, Story, and Global Ductility Evaluation for Complex 2D Steel Buildings: Pushover and Dynamic Analysis

    Full text link
    A numerical investigation regarding ductility evaluation of steel buildings with moment resisting steel frames is conducted. Bending (µLϕ) and tension (µLδ) local ductilities as well as story (µS) and global ductilities are studied. Global ductility is calculated as the mean values of story ductilities (µGS) and as the ratio of the maximum inelastic to yielding top displacements (µGt). The ductility capacity is associated to drifts of about 5%. Ductility values significantly may vary with the strong motion, ductility definition, structural element, story number, type of analysis, and model. µLϕ is much larger for beams than for columns. Even though the demands of µLδ are considered an important issue they are less relevant than µLϕ. µS is much smaller than µLϕ for beams. µGS for dynamic analysis give reasonable values, but µGt does not. µLϕ, µS and µGS obtained from pushover are larger than those obtained from dynamic analysis and unlike the case of dynamic analysis, µLϕ tend to increase with the story number showing an opposite trend. Considering that: µGt for dynamic analysis results in unreasonable values, pushover analysis does not consider energy dissipation, the strong column–weak beam (SCWB) concept was followed in the model designs, and µLδ is not relevant in framed steel buildings, the ratio (RLG) of global to local ductility capacity is calculated as the ratio of µGS to µLϕ of beams, for dynamic analysis. A value of 1/3 is proposed. Thus, if bending local ductility capacity is stated as the basis for the design, the global ductility capacity can be easily estimated
    corecore