1,720,963 research outputs found
Machine Learning una oportunidad para comprender nuestro entorno
Get PDFEl siguiente texto de reflexión analiza el impacto de las tecnologías en los procesos educativos. En una realidad como la nuestra en la que la inteligencia artificial es capaz de procesar millones de datos masivos hace necesaria la implementación del machine learning en la educación básica. El uso de estas herramientas permitirá optimizar nuestro rol de protectores del entorno natural.Postprint (published version
Análisis estructural avanzado del Templo de Huaytará-Huancavelica, Perú
Get PDFEdificado por AstoHuarakac por orden del Inca Pachacutec como una estructura que permita expandir la influencia del naciente imperio Inca sobre poblaciones rebeldes, la construcción de la estructura de este estudio termino en el año 1497.
Con el paso de los años y la casi nula conservación, los daños que afectan la estructurase han hecho más evidentes. Estas patologías se concentran en el los muros de adobe de la nave manifestándose mediante grietas. De la misma forma en el muro Inca se presentan asentamientos y perdida de sección por erosión e incendios anteriores y daños por goteras en las fachadas.
El presente trabajo se centra en el análisis estructural no lineal de la iglesia San Juan Bautista de Huaytara para evaluar su comportamiento bajo acciones sísmicas. En la primera parte se presenta el estado de arte seguido por una investigación histórica sobre las fases de construcción de la iglesia. La tercera parte abarca la obtención de un modelo geométrico 3D aplicando técnicas fotogramétricas. A continuación, se presenta una detallada descripción de los componentes estructurales y materiales durante los trabajos de campo in-situ. La quinta sección trata sobre la caracterización mecánica de los materiales de la estructura mediante ensayos de laboratorio en Lima y Barcelona.
Para la evaluación de comportamiento estructural se ha elaborado un modelo numérico 3D de elementos finitos que se ha analizado frente a cargas gravitatorias y de sismo. Para ello se ha aplicado el método estático no lineal (Pushover) permitiendo evaluar los efectos del sismo en la iglesia, así como la identificación de las causas de daño estructural actual existentes y de los elementos más vulnerables.The church was built by AstoHuaraca by order of the Inca Pachacutec as a structure that allowed expanding the influence of the nascent Inca empire on rebel populations, the construction of the structure finished in 1497. The structure was built by AstoHuaraca by order of the Inca Pachacutec as a structure that allowed expanding the influence of the nascent Inca empire on rebel populations, the construction of the structure finished in 1497.
Over the years and almost no conservation, the damages that affect the structure have become more evident. These pathologies are concentrated in the adobe walls of the nave, manifesting through cracks. In the same way in the Inca wall settlements are presented and section loss due to erosion and previous fires and damage from leaks in the facades.
This work focuses on the non-linear structural analysis of the San Juan Bautista church in Huaytara to evaluate its behavior under seismic actions. In the first part, the state of the art is presented, followed by a historical investigation into the construction phases of the church. The third part covers obtaining a 3D geometric model applying photogrammetric techniques. The following is a detailed description of the structural and material components during on-site field work. The fifth section deals with the mechanical characterization of the materials of the structure through laboratory tests in Lima and Barcelona.
For the evaluation of structural behavior, a 3D finite element numerical model has been developed. The 3D model has been analyzed against gravitational and earthquake loads. For this, the non-linear static method (Pushover) has been applied, allowing the evaluation of the effects of the earthquake in the church, as well as the identification of the causes of existing structural damage and the most vulnerable elements
Análisis estructural avanzado del Templo de Huaytará-Huancavelica, Perú
Get PDFEdificado por AstoHuarakac por orden del Inca Pachacutec como una estructura que permita expandir la influencia del naciente imperio Inca sobre poblaciones rebeldes, la construcción de la estructura de este estudio termino en el año 1497.
Con el paso de los años y la casi nula conservación, los daños que afectan la estructurase han hecho más evidentes. Estas patologías se concentran en el los muros de adobe de la nave manifestándose mediante grietas. De la misma forma en el muro Inca se presentan asentamientos y perdida de sección por erosión e incendios anteriores y daños por goteras en las fachadas.
El presente trabajo se centra en el análisis estructural no lineal de la iglesia San Juan Bautista de Huaytara para evaluar su comportamiento bajo acciones sísmicas. En la primera parte se presenta el estado de arte seguido por una investigación histórica sobre las fases de construcción de la iglesia. La tercera parte abarca la obtención de un modelo geométrico 3D aplicando técnicas fotogramétricas. A continuación, se presenta una detallada descripción de los componentes estructurales y materiales durante los trabajos de campo in-situ. La quinta sección trata sobre la caracterización mecánica de los materiales de la estructura mediante ensayos de laboratorio en Lima y Barcelona.
Para la evaluación de comportamiento estructural se ha elaborado un modelo numérico 3D de elementos finitos que se ha analizado frente a cargas gravitatorias y de sismo. Para ello se ha aplicado el método estático no lineal (Pushover) permitiendo evaluar los efectos del sismo en la iglesia, así como la identificación de las causas de daño estructural actual existentes y de los elementos más vulnerables.The church was built by AstoHuaraca by order of the Inca Pachacutec as a structure that allowed expanding the influence of the nascent Inca empire on rebel populations, the construction of the structure finished in 1497. The structure was built by AstoHuaraca by order of the Inca Pachacutec as a structure that allowed expanding the influence of the nascent Inca empire on rebel populations, the construction of the structure finished in 1497.
Over the years and almost no conservation, the damages that affect the structure have become more evident. These pathologies are concentrated in the adobe walls of the nave, manifesting through cracks. In the same way in the Inca wall settlements are presented and section loss due to erosion and previous fires and damage from leaks in the facades.
This work focuses on the non-linear structural analysis of the San Juan Bautista church in Huaytara to evaluate its behavior under seismic actions. In the first part, the state of the art is presented, followed by a historical investigation into the construction phases of the church. The third part covers obtaining a 3D geometric model applying photogrammetric techniques. The following is a detailed description of the structural and material components during on-site field work. The fifth section deals with the mechanical characterization of the materials of the structure through laboratory tests in Lima and Barcelona.
For the evaluation of structural behavior, a 3D finite element numerical model has been developed. The 3D model has been analyzed against gravitational and earthquake loads. For this, the non-linear static method (Pushover) has been applied, allowing the evaluation of the effects of the earthquake in the church, as well as the identification of the causes of existing structural damage and the most vulnerable elements
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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