3,436 research outputs found

    What decoration do you want? territory, style and aesthetics in the characterization of the decorative programs of iberian pottery

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    En los últimos años se han llevado a cabo numerosos estudios sobre iconografía vascular en época ibérica que han permitido crear, entre otras cuestiones, diferentes modelos teóricos y metodológicos que inciden en el papel que juega la decoración cerámica en el desarrollo de las prácticas sociales. Partiendo de estos planteamientos, y siendo nuestro objeto de estudio la decoración geométrica y abstracta sobre este mismo soporte, se presenta una revisión historiográfica y bibliográfica de aquellos conceptos que articulan, condicionan y estructuran el diseño decorativo. Para ello, analizaremos diferentes aspectos relacionados con la naturaleza de los programas decorativos o la industria de la pintura alfarera en diferentes regiones de la Cultura Ibérica.In last year there have been numerous studies on pottery iconography in the Iberian period. These studies have created theoretical and methodological models that emphasize the role that the ceramic decoration has in the development of social practices. Our attempt is the analysis of geometrical and abstract decoration and for this reason we introduce a historiography and literature review of those concepts that articulate, determine and structure the decorative design. Through the analysis of various issues related to the nature of the decorative programs or painting pottery industry, we explore the value of decoration in the social use of ceramics in different regions of Iberian Culture

    PV Hosting Capacity Analysis and Enhancement Using High Resolution Stochastic Modeling

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    Reduction of CO2 emissions is a main target in the future smart grid. This goal is boosting the installation of renewable energy resources (RES), as well as a major consumer engagement that seeks for a more efficient utilization of these resources toward the figure of ‘prosumers’. Nevertheless, these resources present an intermittent nature, which requires the presence of an energy storage system and an energy management system (EMS) to ensure an uninterrupted power supply. Moreover, network-related issues might arise due to the increasing power of renewable resources installed in the grid, the storage systems also being capable of contributing to the network stability. However, to assess these future scenarios and test the control strategies, a simulation system is needed. The aim of this paper is to analyze the interaction between residential consumers with high penetration of PV generation and distributed storage and the grid by means of a high temporal resolution simulation scenario based on a stochastic residential load model and PV production records. Results of the model are presented for different PV power rates and storage capacities, as well as a two-level charging strategy as a mechanism for increasing the hosting capacity (HC) of the network

    Business complexity and geographic expansion in banking

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    Utilizando datos confidenciales españoles de supervisión, este trabajo examina el efecto sobre el riesgo bancario de la complejidad geográfica y empresarial, y su interacción e importancia relativa, donde el grado de complejidad se basa en la estructura corporativa de las filiales del grupo bancario. Los resultados muestran que, mientras la complejidad empresarial genera un mayor riesgo, la complejidad geográfica genera beneficios de diversificación, por lo que reduce el riesgo. Sin embargo, la complejidad geográfica no es buena por sí sola, ya que depende de cómo se desarrolle. Una mayor complejidad empresarial en el extranjero en relación con la nacional puede contrarrestar estos beneficios de diversificación. En la misma línea, centrarse en el extranjero en áreas en las que el grupo no tiene experiencia en el ámbito nacional también se traduce en un mayor riesgo.Using Spanish confidential supervisory data, this paper examines the effect of geographic and business complexity, their interaction and relative importance for banks’ risk, where the degree of complexity stems from the corporate structure of banking groups affiliates. The results show that while business complexity results in higher risk, geographic complexity gives rise to diversification benefits, thus lowering risk. However, geographic complexity alone is not enough, as its effect depends on how it interacts with business complexity. Higher business complexity abroad in relation to that at home may counterbalance the benefits of diversification. In the same vein, focusing abroad on areas in which the group does not have expertise at home also results in higher risk

    Oral lichenoid lesions related to contact with dental materials: A literature review

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    Oral lichenoid lesions related to contact are defined as oral-cavity eruptions with an identifiable etiology, and are clinically and histologically similar to oral lichen planus. Within this group are found oral lichenoid lesions related to contact with dental materials (OLLC), the most common being those related to silver amalgam. Currently, it remains difficult to diagnose these lesions due to the clinical and histopathological similarity with oral lichen planus and other oral mucosa lesions of lichenoid characteristics. In the present paper, we carry out an updated review of the tests for, and the different characteristics of OLLC, which may aid the diagnosis. For this review, we made searches in the Pubmed® and Cochrane® databases. Among the literature we found several published papers, from which we have used review papers, case papers, cohort studies, case and control studies, and a meta-analysis study. After carrying out this review, we can conclude that the diagnosis of these lesions is still difficult and controversial. However, there are different aspects in the clinical presentation, pathological study and results obtained when replacing suspect materials, which, when taken together, may be useful when establishing the final diagnosis of OLLC

    Assessing the relevance of higher education courses

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    The establishment of the European Higher Education Area has involved specifying lists of professional competencies that programs are expected to develop, and with this the need for procedures to measure how every course within a higher education program is aligned with the program’s competencies. We propose an instrument for characterizing this alignment, a process that we call assessing the relevance of a course. Using information from the course syllabus (objectives, contents and assessment scheme), our instrument produces indicators for characterizing the syllabus in terms of a competence list and for assessing its coherence. Because assessment involves quality, the results obtained can also be used to revise and improve the course syllabus. We illustrate this process with an example of a methods course from a mathematics teacher education program at a Spanish university

    Webs of the power companies. Power companies and communication. Image of the power companies.

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    Este artículo analiza las páginas webs de las principales compañías operantes en el sector de la energía (electricidad y gas) de los países más desarrollados. La situación actual del mercado es muy significativa. Por primera vez en la historia, las administraciones centrales de estos países han consentido liberalizar el mercado energético. Y, aunque este proceso avanza con gran lentitud, comienzan a notarse cambios que anticipan un proceso de concentración, a través de compras, fusiones y acuerdos operativos. En este panorama, juega un importante papel la imagen de las compañías y la comunicación con sus usuarios, y esto sucede también en los medios digitales. En este artículo estudiamos cómo las diferentes compañías utilizan su página web para reforzar su posicionamiento e imagen de cara a los consumidores y también para comenzar a incorporar servicios, buscando una mayor interactividad entre compañía y usuarios. Para realizar este artículo los autores han estudiado a fondo todas las páginas webs de las principales compañías del sector, en el curso de una investigación modalidad Artículo 83 LOU realizada recientemente por los autores en la Universidad Complutense de Madrid.This article analyzes the web pages of the major companies in the energy market (electricity and gas) of the more developed countries (EU and North America). The present situation of the market is very significant: For the first time, the Government of these countries have given permission to liberalize the power market. This process goes on very slowly but we can see now some changes that leads to a process of concentration, through acquisitions, merges and commercial agreements between the companies. In this situation, the image of the companies and the communication with the consumers plays an important role and this happens also in the digital media. In this article we study how the different companies uses their web page to reinforce their positioning, and image. And also how they start incorporating new services looking for a better interactivity between the company and the consumers. The authors have studied the web of the major companies, obtaining the data during an official investigation prepared in the University Complutense of Madrid

    Arts-based research and professional identity awareness for teachers in one ethnic minority educational context

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    Cyanate Assimilation by the Alkaliphilic Cyanide-Degrading Bacterium Pseudomonas pseudoalcaligenes CECT5344: Mutational Analysis of the cyn Gene Cluster

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    The alkaliphilic bacterium Pseudomonas pseudoalcaligenes CECT5344 can grow with cyanate, cyanide, or cyanide-containing industrial residues as the sole nitrogen source, but the assimilation of cyanide and cyanate takes place through independent pathways. Therefore, cyanide degradation involves a chemical reaction between cyanide and oxaloacetate to form a nitrile that is hydrolyzed to ammonium by the nitrilase NitC, whereas cyanate assimilation requires a cyanase that catalyzes cyanate decomposition to ammonium and carbon dioxide. The P. pseudoalcaligenes CECT5344 cynFABDS gene cluster codes for the putative transcriptional regulator CynF, the ABC-type cyanate transporter CynABD, and the cyanase CynS. In this study, transcriptional analysis revealed that the structural cynABDS genes constitute a single transcriptional unit, which was induced by cyanate and repressed by ammonium. Mutational characterization of the cyn genes indicated that CynF was essential for cynABDS gene expression and that nitrate/nitrite transporters may be involved in cyanate uptake, in addition to the CynABD transport system. Biodegradation of hazardous jewelry wastewater containing high amounts of cyanide and metals was achieved in a batch reactor operating at an alkaline pH after chemical treatment with hydrogen peroxide to oxidize cyanide to cyanate

    Web 2.0 and Semantic Web Reliability and Viability Study to Enhance Lexicons for the Pharmacological Domain

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    Los actuales sistemas de Reconocimiento de Entidades en el dominio farmacológico, necesarios como apoyo para el personal sanitario en el proceso de prescripción de un tratamiento farmacológico, sufren limitaciones relacionadas con la falta de cobertura de las bases de datos oficiales. Parece por tanto necesario analizar la fiabilidad de los recursos actuales existentes, tanto en la Web Semántica como en la Web 2.0, y determinar si es o no viable utilizar dichos recursos como fuentes de información complementarias que permitan generar y/o enriquecer lexicones empleados por sistemas de Reconocimiento de Entidades. Por ello, en este trabajo se analizan las principales fuentes de información relativas al dominio farmacológico disponibles en Internet. Este análisis permite concluir que existe información fiable y que dicha información permitiría enriquecer los lexicones existentes con sinónimos y otras variaciones léxicas o incluso con información histórica no recogida ni mantenida en las bases de datos oficiales.Nowadays Named Entity Recognition systems in the pharmacological domain, which are needed to help healthcare professional during pharmacological treatment prescription, suffer limitations related to the lack of coverage in official databases. Therefore, it seems necessary to analyse the reliability of existing resources, both in the Semantic Web and Web 2.0, and determine whether it is feasible or not to use these resources for additional information to generate and/or enhance lexicons used by Named Entity Recognition systems. For this reason, this paper analyses the main sources of information related to the pharmacological domain available on the Internet. This analysis leads to the conclusion that there is reliable information and it would enhance existing lexicons with synonyms, variations and even historical information not collected or maintained in official databases.Este trabajo ha sido financiado parcialmente por la Secretaria de Estado de Investigación, Desarrollo e Innovación - Ministerio de Economía y Competitividad (TIN2012-38536-C03-03 y TIN2012-31224)
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