182 resultados para SISTEMAS DE INFORMACIÓN


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Tanto por el público al que se dirigen como por el tipo de «producto» que ofrecen, las industrias culturales pueden obtener múltiples ventajas con el uso de las redes sociales. En el presente estudio analizamos el papel que juegan las redes sociales online en las empresas culturales a través de la opinión de cualificados expertos en redes sociales y con el método Delphi. Las conclusiones revelan que, en el ámbito de las empresas culturales, existe una prevalencia de los usos utilitarios sobre los expresivos y de las motivaciones proactivas sobre las reactivas, con referencia a las redes sociales.

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In the chemical textile domain experts have to analyse chemical components and substances that might be harmful for their usage in clothing and textiles. Part of this analysis is performed searching opinions and reports people have expressed concerning these products in the Social Web. However, this type of information on the Internet is not as frequent for this domain as for others, so its detection and classification is difficult and time-consuming. Consequently, problems associated to the use of chemical substances in textiles may not be detected early enough, and could lead to health problems, such as allergies or burns. In this paper, we propose a framework able to detect, retrieve, and classify subjective sentences related to the chemical textile domain, that could be integrated into a wider health surveillance system. We also describe the creation of several datasets with opinions from this domain, the experiments performed using machine learning techniques and different lexical resources such as WordNet, and the evaluation focusing on the sentiment classification, and complaint detection (i.e., negativity). Despite the challenges involved in this domain, our approach obtains promising results with an F-score of 65% for polarity classification and 82% for complaint detection.

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In Computer Science world several proposals have been developed for the assessment of the quality of the digital objects, based on the capabilities and facilities offered by current technologies and the available resources. Years ago researchers and specialists from both educational and technological areas have been committed to the development of strategies that improve the quality of education. At present, in the field of teaching-learning, another important aspect is the need to improve the manner of gaining knowledge and learning in education, which the use of learning strategies is a major advance in the teaching-learning process in institutions of higher education. This paper presents QEES, a proposal for evaluating the quality of the learning objects employed on learning strategies to support students during their education processes by using information extraction techniques and ontologies.

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This paper introduces the Sm4RIA Extension for OIDE, which implements the Sm4RIA approach in OIDE (OOH4RIA Integrated Development Environment). The application, based on the Eclipse framework, supports the design of the Sm4RIA models as well as the model-to-model and model-to-text transformation processes that facilitate the generation of Semantic Rich Internet Applications, i.e., RIA applications capable of sharing data as Linked data and consuming external data from other sources in the same manner. Moreover, the application implements mechanisms for the creation of RIA interfaces from ontologies and the automatic generation of administration interfaces for a previously design application.

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In this paper we present a complete system for the treatment of both geographical and temporal dimensions in text and its application to information retrieval. This system has been evaluated in both the GeoTime task of the 8th and 9th NTCIR workshop in the years 2010 and 2011 respectively, making it possible to compare the system to contemporary approaches to the topic. In order to participate in this task we have added the temporal dimension to our GIR system. The system proposed here has a modular architecture in order to add or modify features. In the development of this system, we have followed a QA-based approach as well as multi-search engines to improve the system performance.

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In this paper we describe Fénix, a data model for exchanging information between Natural Language Processing applications. The format proposed is intended to be flexible enough to cover both current and future data structures employed in the field of Computational Linguistics. The Fénix architecture is divided into four separate layers: conceptual, logical, persistence and physical. This division provides a simple interface to abstract the users from low-level implementation details, such as programming languages and data storage employed, allowing them to focus in the concepts and processes to be modelled. The Fénix architecture is accompanied by a set of programming libraries to facilitate the access and manipulation of the structures created in this framework. We will also show how this architecture has been already successfully applied in different research projects.

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El presente capítulo de libro explica las competencias necesarias para un emprendedor y cómo éstas se han trabajado en un Máster de Desarrollo del Talento Directivo.

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El presente capítulo expone el ejemplo de un caso de emprendimiento a partir de los cursos Community Manager de la Universidad de Alicante.

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This paper provides an analysis of the relationships existing between citizen participation and satisfaction levels within the framework of Spanish local administrations, additionally paying attention to the links between organisational size and the said participation and satisfaction levels. The results of a survey questionnaire answered by 388 Human Resources (HR) managers from the largest Spanish Town Halls were examined for these purposes. A claim is made both to increase the degree of citizen participation in public decision-making and to ensure the delivery of efficient and effective public services that can really meet citizens’ needs in Spanish town Halls.

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En este capítulo se explican las principales formas societarias y las complejidades legales de la creación de una nueva empresa.

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Esta tesis está enfocada en el programa de observadores científicos en aguas del Atlántico Sudoccidental que el Instituto Español de Oceanografía (IEO) mantiene desde el año 1989 hasta la actualidad. Dicha base de datos ya ha sido empleada previamente por otros autores para estudiar los recursos pesqueros presentes, tanto en las aguas internacionales de la plataforma patagónica, más allá de las 200 millas náuticas de la costa argentina, como en la zona de pesca actualmente incluida dentro de la jurisdicción de las islas Falkland/Malvinas. Aquí nos centramos en el estudio de la actividad pesquera española que faena en la zona de aguas internacionales conocida como “División 46” y de los recursos a los que se dirige. Varios factores justifican la necesidad de esta tesis: (1) La necesidad de desarrollar una descripción detallada de la base de datos, no realizada hasta el momento. (2) Valorar la representatividad espacial del programa de observadores. (3) Establecer una serie de análisis espacio-temporales que describan la actividad pesquera de la flota española en estas aguas, (4) Desarrollar un completo y detallado análisis espacio-temporal de la distribución y abundancia de los recursos pesqueros a los que se dirige la flota. Por otra parte, las limitaciones propias de un programa de observadores científicos en buques pesqueros nos llevan, por necesidad, a explorar soluciones metodológicas que permitan un análisis fiable del esfuerzo pesquero y de la abundancia de los recursos. A este respecto, la disponibilidad de nueva información relacionada con las características físicas del área de estudio obtenida a raíz de las campañas oceanográficas realizadas en las aguas internacionales de la plataforma patagónica por el IEO y la Secretaría General del Mar (SGM) entre los años 2007 y 2011 y la disponibilidad de datos procedentes del Sistema de Localización de Buques de la SGM entre el periodo 2001 y 2007, nos ha permitido avanzar en el conocimiento de la actividad pesquera española en esta región. Como resultados principales, hemos definido algunas características fundamentales que determinan el marco de estudio de esta base de datos, hemos explorado diversas aproximaciones metodológicas que permitan un análisis de la representatividad de un programa de observadores en aguas internacionales, hemos desarrollado una descripción espacio-temporal de la estrategia de pesca en esta aguas y, a raíz del conocimiento adquirido, hemos realizado un análisis de los factores que afectan a la distribución de M. hubbsi y al esfuerzo de pesca invertido en su captura.

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In this paper, we present a Text Summarisation tool, compendium, capable of generating the most common types of summaries. Regarding the input, single- and multi-document summaries can be produced; as the output, the summaries can be extractive or abstractive-oriented; and finally, concerning their purpose, the summaries can be generic, query-focused, or sentiment-based. The proposed architecture for compendium is divided in various stages, making a distinction between core and additional stages. The former constitute the backbone of the tool and are common for the generation of any type of summary, whereas the latter are used for enhancing the capabilities of the tool. The main contributions of compendium with respect to the state-of-the-art summarisation systems are that (i) it specifically deals with the problem of redundancy, by means of textual entailment; (ii) it combines statistical and cognitive-based techniques for determining relevant content; and (iii) it proposes an abstractive-oriented approach for facing the challenge of abstractive summarisation. The evaluation performed in different domains and textual genres, comprising traditional texts, as well as texts extracted from the Web 2.0, shows that compendium is very competitive and appropriate to be used as a tool for generating summaries.

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Background: The harmonization of European health systems brings with it a need for tools to allow the standardized collection of information about medical care. A common coding system and standards for the description of services are needed to allow local data to be incorporated into evidence-informed policy, and to permit equity and mobility to be assessed. The aim of this project has been to design such a classification and a related tool for the coding of services for Long Term Care (DESDE-LTC), based on the European Service Mapping Schedule (ESMS). Methods: The development of DESDE-LTC followed an iterative process using nominal groups in 6 European countries. 54 researchers and stakeholders in health and social services contributed to this process. In order to classify services, we use the minimal organization unit or “Basic Stable Input of Care” (BSIC), coded by its principal function or “Main Type of Care” (MTC). The evaluation of the tool included an analysis of feasibility, consistency, ontology, inter-rater reliability, Boolean Factor Analysis, and a preliminary impact analysis (screening, scoping and appraisal). Results: DESDE-LTC includes an alpha-numerical coding system, a glossary and an assessment instrument for mapping and counting LTC. It shows high feasibility, consistency, inter-rater reliability and face, content and construct validity. DESDE-LTC is ontologically consistent. It is regarded by experts as useful and relevant for evidence-informed decision making. Conclusion: DESDE-LTC contributes to establishing a common terminology, taxonomy and coding of LTC services in a European context, and a standard procedure for data collection and international comparison.

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This paper reports on the further results of the ongoing research analyzing the impact of a range of commonly used statistical and semantic features in the context of extractive text summarization. The features experimented with include word frequency, inverse sentence and term frequencies, stopwords filtering, word senses, resolved anaphora and textual entailment. The obtained results demonstrate the relative importance of each feature and the limitations of the tools available. It has been shown that the inverse sentence frequency combined with the term frequency yields almost the same results as the latter combined with stopwords filtering that in its turn proved to be a highly competitive baseline. To improve the suboptimal results of anaphora resolution, the system was extended with the second anaphora resolution module. The present paper also describes the first attempts of the internal document data representation.

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The present paper seeks to explain the diverse advantages of virtual books and also the main barriers that make it difficult their implementation in the classroom. A brief review of the literature on ICT, e-learning, distance education and e-books will be complemented with a case study about the preparation, development and implementation of an e-book. The paper could be helpful both for systems analysts and for teachers when they are developing and implementing e-books.