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Escuela Internacional de Doctorado. Programa de Doctorado en Sistemas Inteligentes</span>RecordDoctoral ThesisPublishedIngeniería InformáticaUniversidad Nacional de Educación a Distancia (España). Escuela Internacional de Doctorado. Programa de Doctorado en Sistemas InteligentesNavares Echegaray, RicardoAznarte, José Luistesisuned:ED-Pg-SisInt-Rnavareshttp://e-spacio.uned.es/fez/view/tesisuned:ED-Pg-SisInt-RnavaresengNAVARES_ECHEGARAY_RICARDO_Tesis.pdfpresmd_NAVARES_ECHEGARAY_RICARDO_Tesis.xmltesisuned:ED_Pg_SisIntbibliuned:Setthesisbibliuned:SetopenaireEscuela de Doctorado. Programa de doctorado en Sistemas Inteligentes (UNED)Set de Tesis Doctorales de la UNEDSet de openairehttps://creativecommons.org/licenses/by-nc-nd/4.0Licencia Creative CommonsNavares EchegarayAcceso abierto1.110583334232014-05-29T00:00:00Z4102014-12-10T14:19:27Z2021-03-12T23:32:49ZA scalable approach to exact model and commonality counting for extended feature models.bibliuned:DptoISSI-ETSI-ROBOCITY-1010A software product line is an engineering approach to efficient development of software product portfolios. Key to the success of the approach is to identify the common and variable features of the products and the interdependencies between them, which are usually modeled using feature models. Implicitly, such models also include valuable information that can be used by economic models to estimate the payoffs of a product line. Unfortunately, as product lines grow, analyzing large feature models manually becomes impracticable. This paper proposes an algorithm to compute the total number of products that a feature model represents and, for each feature, the number of products that implement it. The inference of both parameters is helpful to describe the standarization/parameterization balance of a product line, detect scope flaws, assess the product line incremental development, and improve the accuracy of economic models. The paper reports experimental evidence that our algorithm has better runtime performance than existing alternative approaches.07022<a class="citation_author_name" title="Navegar por nombre de Autor de Fernández Amorós, David José" href="/fez/list/author/Fernández Amorós, David José/">Fernández Amorós, David José</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Heradio Gil, Rubén" href="/fez/list/author/Heradio Gil, Rubén/">Heradio Gil, Rubén</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Cerrada, Jose A." href="/fez/list/author/Cerrada, Jose A./">Cerrada, Jose A.</a> y <a class="citation_author_name" title="Navegar por nombre de Autor de Cerrada, Carlos" href="/fez/list/author/Cerrada, Carlos/">Cerrada, Carlos</a> . (<span class="citation_date">2014</span>) <a class="citation_title" title="Click para ver : A scalable approach to exact model and commonality counting for extended feature models." href="/fez/view/bibliuned:DptoISSI-ETSI-ROBOCITY-1010">A scalable approach to exact model and commonality counting for extended feature models.</a>. RecordArtículo de revistaPublishedInformáticaInstitute of Electrical and Electronics Engineers (IEEE)Fernández Amorós, David JoséHeradio Gil, RubénCerrada, Jose A.Cerrada, Carlosbibliuned:DptoISSI-ETSI-ROBOCITY-1010http://e-spacio.uned.es/fez/view/bibliuned:DptoISSI-ETSI-ROBOCITY-1010engDocumento.pdfbibliuned:DptoISSI-ETSI-ROBOCITYbibliuned:Setopenairebibliuned:Setarticulobibliuned:SetFundersDepartamento Ingeniería de Software y Sistemas Informáticos. E.T.S.I. Informática (UNED). Proyecto RoboCity2030-II-CMSet de openaireSet de artículoSet de proyectos financiadoshttp://creativecommons.org/licenses/by-nc-nd/4.0Licencia Creative CommonsFernández AmorósAcceso abierto0.859838731982010-09-01T00:00:00Z722021-10-08T20:22:33Z2021-10-08T20:22:33ZCommunity Structure in Endorsement Social Networksbibliuned:master-ETSInformatica-LSI-GgarridoIn this work, we study the community structure of endorsement networks, i.e., social networks in which a directed edge u → v is asserting an action of support from user u to user v. Examples include scenarios where a user u is favouring a photo, liking a post, or following the microblog of user v. Very often, endorsement networks are sub- networks of more complex social systems; for instance, a photo-sharing site typically includes a “favouring” function, which induces an endorsement network. We start from the hypothesis that the footprint of a community in an endorsement network is a bipartite directed clique from a set of followers to a set of leaders, and apply frequent itemset mining techniques to discover such bicliques. Our analysis of real networks indicated that, with high statistical significance, this hypothesis holds, and that the leaders of a community are endorsing each other forming a very dense nucleus. Our method produces many similar bicliques, which are different footprints of the same community. Thus, we propose a novel clustering technique in order to coalesce similar bicliques into meaningful communities. We explore different similarity measures based on set similarity and on edge density between followers and leaders, and by expressing edge density as an inner product operation we show how to make the clustering algo- rithm scalable. Our experiments demonstrate that our clustering algorithm is capable of discovering communities characterised by a set of leaders who link to each other and followers who link to the leaders.0Doctoral Thesis2862<a class="citation_author_name" title="Navegar por nombre de Autor de Garrido Yuste, Guillermo" href="/fez/list/author/Garrido Yuste, Guillermo/">Garrido Yuste, Guillermo</a>. (<span class="citation_date">2010</span>). <i><a class="citation_title" title="Click para ver : Community Structure in Endorsement Social Networks" href="/fez/view/bibliuned:master-ETSInformatica-LSI-Ggarrido">Community Structure in Endorsement Social Networks</a></i> Master Thesis, <span class="citation_publisher">Universidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingeniería Informática. Departamento de Lenguajes y Sistemas Informáticos</span>Recordmaster TesisPublishedInformáticaUniversidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingeniería Informática. Departamento de Lenguajes y Sistemas InformáticosGarrido Yuste, GuillermoPeñas, Anselmobibliuned:master-ETSInformatica-LSI-Ggarridohttp://e-spacio.uned.es/fez/view/bibliuned:master-ETSInformatica-LSI-GgarridoengGARRIDO_YUSTE_Guillermo_TFM.pdfpresmd_GARRIDO_YUSTE_Guillermo_TFM.xmlbibliuned:master-ETSInformatica-LSIbibliuned:Settrabajosfindemasterbibliuned:SetopenaireMáster Universitario en Lenguajes y Sistemas Informáticos (UNED)Set de items trabajo fin de másterSet de openaireGarrido YusteAcceso abierto0.5419072534232021-08-01T00:00:00Z842021-11-17T18:15:44Z2021-11-17T18:31:18ZThermodynamic analysis and systematic comparison of solar-heated trigeneration systems based on ORC and absorption heat-pumpbibliuned:DptoIE-ETSI-ACES2030-0006Modular and scalable distributed generation solutions as combined cooling, heating and power (CCHP) systems are currently a promising solution for the simultaneous generation of electricity and useful heating and cooling for large buildings or industries. In the present work, a solar-heated trigeneration approach based on different organic Rankine cycle (ORC) layouts and a single-effect H2O/LiBr absorption heat pump integrated as a bottoming cycle is analysed from the thermodynamic viewpoint. The main objective of the study is to provide a comprehensive guide for selecting the most suitable CCHP configuration for a solar-heated CCHP system, following a systematic investigation approach. Six alternative CCHP configurations based on single-pressure and dual-pressure ORC layouts, such as simple, recuperated and superheated cycles, and their combinations, and seven organic fluids as working medium are proposed and compared systematically. A field of solar parabolic trough collectors (SPTCs) used as a heat source of the ORC layouts and the absorption heat pump are kept invariant. A comprehensive parametric analysis of the different proposed configurations is carried out for different design operating conditions. Several output parameters, such as energy and exergy efficiency, net electrical power and electrical to heating and cooling ratios are examined. The study reveals that the most efficient CCHP configuration is the single-pressure ORC regenerative recuperated superheated cycle with toluene as a working fluid, which is on average 25% and 8% more efficient than the variants with single-pressure simple cycle and the dual-pressure recuperated superheated cycle, respectively. At nominal design conditions, the best performing CCHP variant presents 163.7% energy efficiency and 12.3% exergy efficiency, while the electricity, cooling and heating productions are 56.2 kW, 223.0 kW and 530.1 kW, respectively02192<a class="citation_author_name" title="Navegar por nombre de Autor de García-Domínguez, Jesús" href="/fez/list/author/García-Domínguez, Jesús/">García-Domínguez, Jesús</a> y <a class="citation_author_name" title="Navegar por nombre de Autor de Marcos, J. Daniel" href="/fez/list/author/Marcos, J. Daniel/">Marcos, J. Daniel</a> . (<span class="citation_date">2021</span>) <a class="citation_title" title="Click para ver : Thermodynamic analysis and systematic comparison of solar-heated trigeneration systems based on ORC and absorption heat-pump" href="/fez/view/bibliuned:DptoIE-ETSI-ACES2030-0006">Thermodynamic analysis and systematic comparison of solar-heated trigeneration systems based on ORC and absorption heat-pump</a>. RecordArtículo de revistaPublishedEnergías RenovablesProyecto ACES2030-CM (Alta Concentración Energía Solar) S2018/EMT4319MDPIGarcía-Domínguez, JesúsMarcos, J. Daniel1bibliuned:DptoIE-ETSI-ACES2030-0006http://e-spacio.uned.es/fez/view/bibliuned:DptoIE-ETSI-ACES2030-0006engSolar_trigeneration_Energies.pdfpresmd_Solar_trigeneration_Energies.xmlbibliuned:DptoIE-ETSI-ACES2030bibliuned:Setarticulobibliuned:SetopenaireProyecto ACES2030-CM (Alta Concentración Energía Solar) S2018/EMT4319Set de artículoSet de openairehttp://creativecommons.org/licenses/by/4.0Licencia Creative CommonsGarcía-DomínguezAcceso abiertohttps://doi.org/10.3390/en141647700.4695235234232023-09-20T00:00:00Z32024-01-27T09:03:56Z2024-01-27T09:03:56ZA Knowledge Graph Framework for Dementia Research Databibliuned:95-Rmartinez-0005Dementia disease research encompasses diverse data modalities, including advanced imaging, deep phenotyping, and multi-omics analysis. However, integrating these disparate data sources has historically posed a significant challenge, obstructing the unification and comprehensive analysis of collected information. In recent years, knowledge graphs have emerged as a powerful tool to address such integration issues by enabling the consolidation of heterogeneous data sources into a structured, interconnected network of knowledge. In this context, we introduce DemKG, an open-source framework designed to facilitate the construction of a knowledge graph integrating dementia research data, comprising three core components: a KG-builder that integrates diverse domain ontologies and data annotations, an extensions ontology providing necessary terms tailored for dementia research, and a versatile transformation module for incorporating study data. In contrast with other current solutions, our framework provides a stable foundation by leveraging established ontologies and community standards and simplifies study data integration while delivering solid ontology design patterns, broadening its usability. Furthermore, the modular approach of its components enhances flexibility and scalability. We showcase how DemKG might aid and improve multi-modal data investigations through a series of proof-of-concept scenarios focused on relevant Alzheimer’s disease biomarkers.0412<a class="citation_author_name" title="Navegar por nombre de Autor de Timón-Reina, Santiago" href="/fez/list/author/Timón-Reina, Santiago/">Timón-Reina, Santiago</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Rincón, Mariano" href="/fez/list/author/Rincón, Mariano/">Rincón, Mariano</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Martínez Tomás, Rafael" href="/fez/list/author/Martínez Tomás, Rafael/">Martínez Tomás, Rafael</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Kirsebom, Bjørn-Eivind" href="/fez/list/author/Kirsebom, Bjørn-Eivind/">Kirsebom, Bjørn-Eivind</a> y <a class="citation_author_name" title="Navegar por nombre de Autor de Fladby, Tormod" href="/fez/list/author/Fladby, Tormod/">Fladby, Tormod</a> . (<span class="citation_date">2023</span>) <a class="citation_title" title="Click para ver : A Knowledge Graph Framework for Dementia Research Data" href="/fez/view/bibliuned:95-Rmartinez-0005">A Knowledge Graph Framework for Dementia Research Data</a>. RecordArtículo de revistaPublishedIngeniería InformáticaLa versión registrada de este artículo, publicado por primera vez en Applied Sciences, está disponible en línea en el sitio web del editor: MDPI https://doi.org/10.3390/app131810497MDPITimón-Reina, SantiagoRincón, MarianoMartínez Tomás, RafaelKirsebom, Bjørn-EivindFladby, TormodApplied Sciencesbibliuned:95-Rmartinez-0005http://e-spacio.uned.es/fez/view/bibliuned:95-Rmartinez-00051813engMartinez_Tomas_Rafael_A_Knowledge_Graph_Frame.pdfpresmd_Martinez_Tomas_Rafael_A_Knowledge_Graph_Frame.xml2076-3417bibliuned:95bibliuned:Setarticulobibliuned:SetopenaireDepartamento de Inteligencia Artificial (UNED). ArtículosSet de artículoSet de openairehttps://creativecommons.org/licenses/by/4.0/deed.esLicencia Creative CommonsTimón-ReinaAcceso abierto10.3390/app1318104970.4695235234232023-01-01T00:00:00Z82024-01-19T08:54:51Z2024-01-19T08:54:51ZExploring IoT Vulnerabilities in a Comprehensive Remote Cybersecurity Laboratorybibliuned:DptoIEEC-ETSI-Articulos-Smartin-0001With the rapid proliferation of Internet of things (IoT) devices across various sectors, ensuring robust cybersecurity practices has become paramount. The complexity and diversity of IoT ecosystems pose unique security challenges that traditional educational approaches often fail to address comprehensively. Current curricula may provide theoretical knowledge but typically lack the practical components necessary for students to engage with real-world cybersecurity scenarios. This gap hinders the development of proficient cybersecurity professionals capable of securing complex IoT infrastructures. To bridge this educational divide, a remote online laboratory was developed, allowing students to gain hands-on experience in identifying and mitigating cybersecurity threats in an IoT context. This virtual environment simulates real IoT ecosystems, enabling students to interact with actual devices and protocols while practicing various security techniques. The laboratory is designed to be accessible, scalable, and versatile, offering a range of modules from basic protocol analysis to advanced threat management. The implementation of this remote laboratory demonstrated significant benefits, equipping students with the necessary skills to confront and resolve IoT security issues effectively. Our results show an improvement in practical cybersecurity abilities among students, highlighting the laboratory’s efficacy in enhancing IoT security education.0442<a class="citation_author_name" title="Navegar por nombre de Autor de Delgado, Ismael" href="/fez/list/author/Delgado, Ismael/">Delgado, Ismael</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Sancristobal, Elio" href="/fez/list/author/Sancristobal, Elio/">Sancristobal, Elio</a>, <a class="citation_author_name" title="Navegar por nombre de Autor de Martin, Sergio" href="/fez/list/author/Martin, Sergio/">Martin, Sergio</a> y <a class="citation_author_name" title="Navegar por nombre de Autor de Robles-Gómez, Antonio" href="/fez/list/author/Robles-Gómez, Antonio/">Robles-Gómez, Antonio</a> . (<span class="citation_date">2023</span>) <a class="citation_title" title="Click para ver : Exploring IoT Vulnerabilities in a Comprehensive Remote Cybersecurity Laboratory" href="/fez/view/bibliuned:DptoIEEC-ETSI-Articulos-Smartin-0001">Exploring IoT Vulnerabilities in a Comprehensive Remote Cybersecurity Laboratory</a>. RecordArtículo de revistaPublishedInformática IndustrialLa versión registrada de este artículo, publicado por primera vez en Sensors, está disponible en línea en el sitio web del editor: MDPI, https://doi.org/10.3390/s23229279MDPIDelgado, IsmaelSancristobal, ElioMartin, SergioRobles-Gómez, AntonioSensorsbibliuned:DptoIEEC-ETSI-Articulos-Smartin-0001http://e-spacio.uned.es/fez/view/bibliuned:DptoIEEC-ETSI-Articulos-Smartin-000123engMartin_Gutierrez_Sergio_ExploringIoTVulnerabi.pdfpresmd_Martin_Gutierrez_Sergio_ExploringIoTVulnerabi.xml1424-8220bibliuned:DptoIEEC-ETSI-Articulosbibliuned:Setarticulobibliuned:SetopenaireDepartamento de Ingeniería Eléctrica, Electrónica y de Control (UNED). ArtículosSet de artículoSet de openairehttp://creativecommons.org/licenses/by/4.0Licencia Creative CommonsDelgadoAcceso abiertohttps://doi.org/10.3390/s232292790.4695235231982021-09-19T00:00:00Z1972022-10-01T05:46:04Z2022-10-01T05:46:04ZLane Detection based on Multiple Frames Informationbibliuned:master-ETSInformatica-IAA-DturradoOne of the fundamental challenges in the field of autonomous driving is the ability to detect dynamic objects, such as vehicles or pedestrians, and statics ones, such as lanes, in the surroundings of the vehicle. The accurate perception of the environment is crucial for a safe decision making and motion planning. In recent years, advanced driver-assistance systems (ADAS) are getting more important, incorporating new features that a few years ago were limited to luxury cars or even not technically possible. In particular, one of this features is the lane keeping assist system which keeps the car centered in the lane. This system is not just a relevant part of actual driving support features, but it is a crucial function of future fully autonomous vehicles (AD). A few years ago, many of these systems relied on traditional computer vision algorithms, based on computational expensive manually calibrated methods. Their lack of robustness under the long tale of driving scenarios makes them not very suitable for scalability. Moreover the limited computational resources of embedded system puts additional requirements on the design of real time capable algorithms. Nowadays, the state-of-the-art object and structure detectors for advanced driverassistance systems are based on machine learning and, in particular, deep learning approaches. However, such approaches still mainly function on single-frame basis and do not exploit the (high) temporal correlation of the signals representing the perceived environment. Single-frame detection networks might work well under circumstances where the lanes are perfectly visible, but show a lack of performance under certain situations, like occlusions, shadows, rain, snow, lane degradation, etc. To address the aforementioned problem, this thesis introduces temporal information for lane binary segmentation, applying convolutional long short-term memory (ConvLSTM) and convolutional neural networks (CNN) to improve substantially the performance of single-frame architecture under challenging and adverse situations.0Doctoral Thesis1962<a class="citation_author_name" title="Navegar por nombre de Autor de Turrado Blanco, Diego" href="/fez/list/author/Turrado Blanco, Diego/">Turrado Blanco, Diego</a>. (<span class="citation_date">2021</span>). <i><a class="citation_title" title="Click para ver : Lane Detection based on Multiple Frames Information" href="/fez/view/bibliuned:master-ETSInformatica-IAA-Dturrado">Lane Detection based on Multiple Frames Information</a></i> Master Thesis, <span class="citation_publisher">Universidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingeniería Informática. Departamento de Inteligencia Artificial</span>Recordmaster TesisPublishedIngeniería InformáticaUniversidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingeniería Informática. Departamento de Inteligencia ArtificialTurrado Blanco, DiegoKoloda, JánRincón Zamorano, Marianobibliuned:master-ETSInformatica-IAA-Dturradohttp://e-spacio.uned.es/fez/view/bibliuned:master-ETSInformatica-IAA-DturradoengTurrado_Blanco_Diego_TFM.pdfpresmd_Turrado_Blanco_Diego_TFM.xmlbibliuned:master-ETSInformatica-IAAbibliuned:Settrabajosfindemasterbibliuned:SetopenaireMáster Universitario en I.A. Avanzada: Fundamentos, Métodos y Aplicaciones (UNED)Set de items trabajo fin de másterSet de openaireTurrado BlancoAcceso abierto0.4695235234172014-01-01T00:00:00Z27172015-02-16T20:17:16Z2015-02-24T04:07:41ZDiseño y evaluación de sistemas de estimación de ancho de banda disponible para servicios adaptativos de vídeo streamingtesisuned:IngInd-LpozuecoLa transmisión de contenidos multimedia a través de la red es una de las aplicaciones más demandadas actualmente. No en vano, más de la mitad del tráfico en Internet se corresponde con servicios de streaming de vídeo en lo que calificamos como “horas punta”. Garantizar la calidad en la percepción de los contenidos frente a la gran demanda del servicio es el gran desafío al que se enfrentan los servicios de vídeo streaming. Además, hoy en día, el acceso a contenidos multimedia puede realizarse a través de diversos tipos de redes y con una amplia variedad de terminales que presentan diferentes restricciones. Por tanto, la adaptación de los contenidos a un entorno heterogéneo como es Internet será un proceso clave en la mejora de la percepción de la calidad del usuario. La presente tesis doctoral aborda esta problemática, aportando soluciones para tres formas diferentes de llevar a cabo la adaptación de los contenidos. Primeramente, se presenta un estimador no intrusivo para la tecnología streaming, basando la adaptación de los contenidos en la transcodificación de los mismos en tiempo real. Analizando los paquetes de vídeo recibido en la aplicación del cliente, el estimador es capaz de seleccionar el bitrate de codificación más adecuado para el ancho de banda disponible end-to-end. La estimación del ancho de banda disponible se lleva a cabo con métodos no intrusivos, basados en métricas clásicas como los paquetes perdidos o el jitter pero también en métricas novedosas como la linealidad de los instantes de recepción de los paquetes RTP. El estimador ha sido integrado en una arquitectura real cliente/servidor y evaluado con diferentes situaciones de tráfico en la red. La segunda solución para un sistema streaming adaptativo está basada en el empleo de la tecnología Scalable Video Coding (SVC), recientemente estandarizada como extensión del códec H.264/AVC. Empleando información de feedback de los clientes acerca del estado de la transmisión, el servidor es capaz de seleccionar la combinación más adecuada de capas SVC para el ancho de banda disponible. Las métricas de estimación de ancho de banda analizadas en el sistema anterior se adaptan a la tecnología SVC para perfeccionar el algoritmo de estimación. El sistema se implementa en equipos reales y los resultados muestran la correcta operación y la precisión del sistema ante diferentes variaciones del ancho de banda disponible, así como la mejora en la escalabilidad del sistema cuando al servicio acceden clientes de manera simultánea. Por último, no podemos obviar el incremento de popularidad de las soluciones streaming basadas en HTTP. A pesar de que los protocolos basados en TCP no fueron considerados, en un principio, aptos para la transmisión de contenido multimedia en tiempo real, el reciente desarrollo del estándar Dynamic Adaptive Streaming over HTTP (DASH) proporciona una solución. De esta forma, basándose en protocolos ampliamente utilizados en Internet, se facilita el reaprovechamiento de la infraestructura de red desplegada. En este sentido, en esta tesis se propone un último sistema streaming adaptativo empleando dicha tecnología. Al igual que en las propuestas previas, el sistema se implementará en equipos reales y se analizarán las mejoras introducidas.0Doctoral Thesis15002<a class="citation_author_name" title="Browse by Author Name for Pozueco Álvarez, Laura" href="/fez/list/author/Pozueco Álvarez, Laura/">Pozueco Álvarez, Laura</a>. <b><i><a class="citation_title" title="Click para ver : Diseño y evaluación de sistemas de estimación de ancho de banda disponible para servicios adaptativos de vídeo streaming" href="/fez/view/tesisuned:IngInd-Lpozueco">Diseño y evaluación de sistemas de estimación de ancho de banda disponible para servicios adaptativos de vídeo streaming</a></i></b> . <span class="citation_date">2014</span>. <span class="citation_publisher">Universidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingenieros Industriales.</span>RecordDoctoral ThesisPublishedIngeniería IndustrialUniversidad Nacional de Educación a Distancia (España). Escuela Técnica Superior de Ingenieros Industriales.Pozueco Álvarez, LauraDíaz Orueta, Gabriel (Director de Tesis)García Pañeda, Xabiel (Codirector de Tesis)1tesisuned:IngInd-Lpozuecohttp://e-spacio.uned.es/fez/view/tesisuned:IngInd-LpozuecospaPOZUECO_ALVAREZ_Laura_Tesis.pdfpresmd_POZUECO_ALVAREZ_Laura_Tesis.xmlbibliuned:Setthesistesisuned:IngIndbibliuned:SetopenaireSet de Tesis Doctorales de la UNEDTesis de la Facultad E.T.S. Ingenieros Industriales (UNED)Set de openairehttps://creativecommons.org/licenses/by-nc-nd/4.0/Licencia de acceso Creative CommonsPozueco ÁlvarezAcceso abierto0.39713984224223222284228422