8,595 research outputs found
The retrieval of moving images at Spanish film archives: the oversight of content analysis
In the field of library and information science, content analysis is a crucial task for an effective retrieval of information by users at an archive. In this research, we analyse the current state of this task and the possibilities of retrieval of film information at six Spanish important film archives, interviewing their responsible librarians for film cataloguing and comparing the content fields inside their film cataloguing records used by each one of these six organizations
Unprecedented layered coordination polymers of dithiolene group 10 metals: Magnetic and electrical properties
One-pot reactions between Ni(ii), Pd(ii) or Pt(ii) salts and 3,6-dichloro-1,2-benzenedithiol (HSC6H2Cl2SH) in KOH medium under argon lead to a series of bis-dithiolene coordination polymers. X-ray analysis shows the presence of a common square planar complex [M(SC6H2Cl2S)2]2- linked to potassium cations forming either a two-dimensional coordination polymer network for {[K2(μ-H2O)2(μ-thf)(thf)2][M(SC6H2Cl2S)2]}n [M = Ni (1) and Pd (2)] or a one-dimensional coordination polymer for {[K2(μ-H2O)2(thf)6][Pt(SC6H2Cl2S)2]}n (3). In 3 the coordination environment of the potassium ions may slightly change leading to the two-dimensional coordination polymer {[K2(μ-H2O)(μ-thf)2][Pt(SC6H2Cl2S)2]}n (4) that crystallizes together with 3. The physical characterization of compounds 1-3 show similar trends, they are diamagnetic and behave as semiconductorsWe thank financial support from MICINN (MAT2013-46753-C2-1-P, CTQ2014-52758-P and MAT2014-56143-R) and Generalitat Valenciana (PrometeoII/2014/076
Puesta en valor de los elementos patrimoniales en el centro de Bogotá
Trabajo de gradoSe realiza el estudio análisis y posterior propuesta a la resolución de un problema en el centro histórico de la ciudad de Bogotá, por medio del cual se genera un proyecto urbano y arquitectónico el cual da respuesta de manera integra a acorde al diagnóstico realizadoINTRODUCCIÓN
1. OBJETIVOS
2. PLANTEAMIENTO DEL PROBLEMA
3. DEFINICIÓN DEL PROBLEMA
4. DIAGNOSTICO
5. PROBLEMÁTICAS
6. ESTRATEGIAS
7. OPERACIONES
8. REFERENTE
9. DESARROLLO DE PROYECTOPregradoArquitect
Efecto de la recurrencia de los incendios sobre la resiliencia post-incendio de las comunidades vegetales de Cataluña a partir de imágenes de satélite
La recuperación post-incendio de la vegetación ha sido estudiada sobre todo a nivel de parcela. A escala regional
diferentes factores pueden determinar la variabilidad en la capacidad de regeneración vegetal. El empleo de la
teledetección permite efectuar un seguimiento de la regeneración a gran escala. En este trabajo se muestra como la
recurrencia de incendios a lo largo del periodo de estudio (1975-1998) provocó una disminución significativa de la
resiliencia de los bosques y matorrales mediterráneos de Cataluña. En las zonas quemadas una vez se encontró mayor
resiliencia en las formaciones dominadas por especies rebrotadoras
La divulgación científica en la sociedad del conocimiento
En este trabajo se pretende mostrar el papel que juega la divulgación científica en la sociedad del conocimiento. A lo largo de cuatro capítulos se hace un repaso sobre qué es la divulgación científica, cuáles son sus alcances y sus objetivos, cuáles son sus limitantes y sus aciertos. Se describe también el proceso que ha sufrido la divulgación científica para lograr sus metas. En el capítulo cinco se analizan las características de la divulgación científica en la sociedad actual y como debe proceder para su aprehensión por la llamada sociedad del conocimiento.Departamento de Filosofía (Filosofía, Lógica y Filosofía de la Ciencia, Teoría e Historia de la Educación, Filosofía Moral, Estética y Teoría de las Artes)Máster en Lógica y Filosofía de la Cienci
Impact properties and water uptake behavior of old newspaper recycled fibers-reinforced polypropylene composites
Natural fiber-reinforced thermoplastic composites can be an alternative to mineral fiber-based composites, especially when economic and environment concerns are included under the material selection criteria. In recent years, the literature has shown how lignocellulosic fiber-reinforced composites can be used for a variety of applications. Nonetheless, the impact strength and the water uptake behavior of such materials have been seen as drawbacks. In this work, the impact strength and the water uptake of composites made of polypropylene reinforced with fibers from recycled newspaper have been researched. The results show how the impact strength decreases with the percentage of reinforcement in a similar manner to that of glass fiber-reinforced polypropylene composites as a result of adding a fragile phase to the material. It was found that the water uptake increased with the increasing percentages of lignocellulosic fibers due to the hydrophilic nature of such reinforcements. The diffusion behavior was found to be Fickian. A maleic anhydride was added as a coupling agent in order to increase the strength of the interface between the matrix and the reinforcements. It was found that the presence of such a coupling agent increased the impact strength of the composites and decreased the water uptake. Impact strengths of 21.3 kJ/m3 were obtained for a coupled composite with 30 wt % reinforcement contents, which is a value higher than that obtained for glass fiber-based materials. The obtained composites reinforced with recycled fibers showed competitive impact strength and water uptake behaviors in comparison with materials reinforced with raw lignocellulosic fibers. The article increases the knowledge on newspaper fiber-reinforced polyolefin composite properties, showing the competitiveness of waste-based materialsPostprint (published version
Broken Film Narratives: The Invisibility of Latinx Women in Education Through Film and Literature
Our research aims to explore the lack of Latinx women being portrayed in films with education as the central theme. Although there are Latinx women in films today, they are not portrayed in an entirely positive light. They are commonly represented in an oversexualized manner compared to latinx men who are portrayed as hard workers and commonly seeking education. A good example would be the film McFarland USA by Niki Caro in which young male adolescents are a part of a cross country team. Although the film does a great job of portraying their lives as latinx adolescents living in the United States, the film fails to depict the women’s team overall. There are films on education that portray women, such as Real Women Have Curves by Patricia Cardoso, a coming-of-age film depicting a young Latina struggling to defend her right to obtain a higher education. However, a common theme throughout the film is her mother commenting on her body and her duties as a woman in serving men. As a result, we are looking to investigate the lack of Latinx women being depicted in a positive light in current films
Higgs decay into two photons from a 3HDM with flavor symmetry
In this short letter we show that the excess of events in the decay of Higgs
to two photons reported by ATLAS and CMS can be easily accommodated in a flavor
renormalizable three Higgs doublet model (3HDM). The model is consistent with
all fermion masses, mixing angles, and flavor changing neutral current
constraints.Comment: 4 pages, 3 figures, version to be published in PL
Juegos para colorear grafos
En este trabajo se presentan aplicaciones informáticas de carácter lúdico y didáctico, que tienen como objetivo la comprensión de las estrategias para colorear grafos. La primera de ellas es un juego de dos jugadores (uno de ellos puede ser el ordenador) en el que, alternativamente, cada jugador colorea un vértice de un grafo previamente construido. Los colores se eligen de una lista adecuada para cada grafo. Vence el primer jugador si consigue que, en algún momento, el segundo jugador no disponga de ningún color válido para seguir coloreando el grafo. Si, por el contrario, el grafo se colorea correctamente, el vencedor es el segundo jugador. La segunda aplicación es también un juego decoloración de grafos, pero en esta ocasión se colorean las aristas. Ambas aplicaciones disponen de un banco de grafos del que se elige uno en cada nuevo juego
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