Search result194 results
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La protección de datos en los despachos de abogados
Martínez Martínez, Ricard
(2011). Article000633-Actualidad Jurídica Aranzadi. No.Article IN-RECJ Q1
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Optimal Gossip Algorithm for Distributed Consensus SVM Training in Wireless Sensor Networks
Flouri, K.; Beferull-Lozano, B.; Tsakalides, P.
(2010). ArticleIn this paper, we consider the distributed training of a SVM using measurements collected by the nodes of a Wireless Sensor Network in order to achieve global consensus with the minimum possible inter-node communications for data exchange. We derive a novel mathematical characterization for the optimal selection of partial information that neighboring sensors should exchange in order to achieve consensus in the network. We provide a selection function which ranks the training vectors in order of importance in the learning process. The amount of information exchange can vary, based on an appropriately chosen threshold value of this selection function, providing a desired trade-off between...
In this paper, we consider the distributed training of a SVM using measurements collected by the nodes of a Wireless Sensor Network in order to achieve global consensus with the minimum possible inter-node communications for data exchange. We derive a novel mathematical characterization for the optimal selection of partial information that neighboring sensors should exchange in order to achieve consensus in the network. We provide a selection function which ranks the training vectors in order of importance in the learning process. The amount of information exchange can vary, based on an appropriately chosen threshold value of this selection function, providing a desired trade-off between classification accuracy and power consumption. Through simulation experiments, we show that the proposed algorithm uses significantly less measurements to achieve a consensus that coincides with the optimal hyperplane obtained using a centralized SVM-based classifier that uses the entire sensor data at a fusion center.
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Closed-form Approximations for Cooperative LLR-based Energy Detection in Cognitive Radios
Khalife, I.; Beferull-Lozano, B.
(2010). ArticleIn this paper, we obtain approximations for the optimal Log-Likelihood Ratio (LLR) decision rule in cooperative detection when local energy detectors are assumed. Considering conditional independence, we also show under which bandwidth and sampling frequency regimes these approximations hold best. Furthermore, we present simulations where the performance of the approximated LLR decision rule is compared with other sub- optimal decision rules given in the literature such as the optimal linear weighting. The simulations show that the density functions of the approximations exhibit negligible error in comparison with the exact ones, when conditions on bandwidth and sampling frequencies are...
In this paper, we obtain approximations for the optimal Log-Likelihood Ratio (LLR) decision rule in cooperative detection when local energy detectors are assumed. Considering conditional independence, we also show under which bandwidth and sampling frequency regimes these approximations hold best. Furthermore, we present simulations where the performance of the approximated LLR decision rule is compared with other sub- optimal decision rules given in the literature such as the optimal linear weighting. The simulations show that the density functions of the approximations exhibit negligible error in comparison with the exact ones, when conditions on bandwidth and sampling frequencies are met. The approximations presented in this paper allow to perform efficiently the joint LLR decision rule for a set of nodes without requiring Monte-Carlo simulations.
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CIMUAT: Congreso Internacional Mujer, Arte y Tecnología: SAMBORI: Nueva Forma de Interacción con Realidad Aumentada
Martínez, Bibiana; Vera, Lucía; Coma, Inmaculada; Fernández, Marcos
(2010). ArticleEl sistema que presentamos fue exhibido en Valencia en la iniciativa DIGITAL MEDIA 1.0 y consiste en un proyecto experimental de Realidad Aumentada donde el usuario utiliza sus movimientos sobre el juego infantil de la rayuela como sistema de interacción. SAMBORI ofrece un sistema que realiza una intervención del espacio, permitiendo al usuario sumergirse en un mundo real aumentado, con el que puede interactuar en tiempo real. Presentamos en este artículo una instalación interactiva de R. A. diseñando para ello una interfaz de navegación intuitiva, natural y libre de artificios. De este modo hemos determinado basar nuestra investigación en el estudio de la interacción dando prioridad al...
El sistema que presentamos fue exhibido en Valencia en la iniciativa DIGITAL MEDIA 1.0 y consiste en un proyecto experimental de Realidad Aumentada donde el usuario utiliza sus movimientos sobre el juego infantil de la rayuela como sistema de interacción. SAMBORI ofrece un sistema que realiza una intervención del espacio, permitiendo al usuario sumergirse en un mundo real aumentado, con el que puede interactuar en tiempo real. Presentamos en este artículo una instalación interactiva de R. A. diseñando para ello una interfaz de navegación intuitiva, natural y libre de artificios. De este modo hemos determinado basar nuestra investigación en el estudio de la interacción dando prioridad al grado de inmersión del usuario. Hemos creado un espacio de interacción libre, en el que hemos involucrado activamente al usuario de manera física, y emocional creando una experiencia social y evocadora. El sistema que presentamos fue exhibido en Valencia en la iniciativa DIGITAL MEDIA 1.0 y consiste en un proyecto experimental de Realidad Aumentada donde el usuario utiliza sus movimientos sobre el juego infantil de la rayuela como sistema de interacción. SAMBORI ofrece un sistema que realiza una intervención del espacio, permitiendo al usuario sumergirse en un mundo real aumentado, con el que puede interactuar en tiempo real. Presentamos en este artículo una instalación interactiva de R. A. diseñando para ello una interfaz de navegación intuitiva, natural y libre de artificios. De este modo hemos determinado basar nuestra investigación en el estudio de la interacción dando prioridad al grado de inmersión del usuario.
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NOVATICA: Desarrollo de simuladores marítimos para FOREM-A.
Coma Tatay, Inmaculada; Casas Yrurzun, Sergio; Llorenç Palau, Ausiàs; Riera López, José Vicente
(2010). ArticleDescripción de los simuladores marítimos desarrollados para FOREM-A. El grupo artec de la Universitat de València, especializado en gráficos y sistemas de simulación, ha trabajado junto con la Fundación para la Formación y Empleo de Andalucía (FOREM-A) del sindicado CCOO en el desarrollo de diferentes sistemas de simulación. El objetivo de esta colaboración ha sido la mejora de los procesos de formación incorporando nuevas tecnologías y sistemas de simulación. Para ello se han desarrollado varios simuladores marítimos de los que detallaremos sus características, haciendo especial hincapié en los elementos software y hardware desarrollados específicamente para tales proyectos.
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EUROGRAPHICS'10: A Mobile Augmented Reality System to Enjoy the Sagrada Familia
Gimeno, Jesús; Pardo, Fernando; Morillo, Pedro; Fernández, Marcos
(2010). ArticleSAFAR is a mobile Augmented Reality application that makes possible to see in real-time the ‘Sagrada Familia’ as it will look like when it be finished. The application successfully integrates outdoor tracking and 3D rendering processes to provide an augmented view of this under construction monument to city travellers, equipped with Nokia mobile phones. This outdoor tracking process includes a custom skyline detection algorithm, which provides real-time tracking and avoids not only external calibrations, but also additional sensors connected to the mobile phone. Moreover, the occlusion problem of the resulting images are improved by means of predefined drawings sequences, which control the...
SAFAR is a mobile Augmented Reality application that makes possible to see in real-time the ‘Sagrada Familia’ as it will look like when it be finished. The application successfully integrates outdoor tracking and 3D rendering processes to provide an augmented view of this under construction monument to city travellers, equipped with Nokia mobile phones. This outdoor tracking process includes a custom skyline detection algorithm, which provides real-time tracking and avoids not only external calibrations, but also additional sensors connected to the mobile phone. Moreover, the occlusion problem of the resulting images are improved by means of predefined drawings sequences, which control the combination between computer-generated and displayed video images. The performance evaluation results show that both the outdoor tracking and the 3D rendering techniques combined in SAFAR requires relatively low computational load, while providing a proper accuracy.
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El Organismo de Inspección de Túneles de Bizkaia, experiencias de sus dos años de funcionamiento
MARTÍNEZ PLUMÉ, JAVIER; ZURINAGA COBEAGA, JAVIER
(2010). Participació en congressos -
Low cost identification applications in traffic vehicular environments
Segura García, Jaume. Soriano García, Francisco R
(2010). LlibreFrequency Identification Fundamentals and Applications.
ISBN: 978-953-7619-74-9 -
Dealing with Traffic information and User Profiles: a Semantic Approach Based on DATEX II.
Martínez Durá, Juan Jósé. Samper Zapater, Jose Javier. Torres Garrigós, David.
(2010). LlibreMechatronics Systems: Intelligent Transportation Vehicles.
ISBN: 978-1-60805-081-9 -
ECT'10: A New Approach to the Management of the Setting out in Construction Based on Augmented Reality Techniques
Gimeno, Jesús; Riera, Jose V.; Morillo, Pedro; Fernández, Marcos
(2010). ArticleThe setting out is the first step of construction of any building. This complex task used to be performed by means of specialized and expensive surveying equipment in order to minimize the deviation of the constructed areas from the information provided by design plans. This paper presents a new low-cost system oriented to the management of setting out in construction sites based on Augmented Reality technology. In this context, Augmented Reality allows surveying technicians to enhance the user’s view of the real-world with visual information provided by virtual objects. The proposed system consists of an Augmented Reality application connected to a hardware platform based on commercial...
The setting out is the first step of construction of any building. This complex task used to be performed by means of specialized and expensive surveying equipment in order to minimize the deviation of the constructed areas from the information provided by design plans. This paper presents a new low-cost system oriented to the management of setting out in construction sites based on Augmented Reality technology. In this context, Augmented Reality allows surveying technicians to enhance the user’s view of the real-world with visual information provided by virtual objects. The proposed system consists of an Augmented Reality application connected to a hardware platform based on commercial off-the-shelf (COTS) components. The results of the proposed experiments show that the presented approach can be considered an efficient quality/cost trade-off for setting out purposes in actual construction sit
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