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Mostrando ítems 21-40 de 362

    • closedAccess   PPAR-α L162V and PGC-1 G482S gene polymorphisms, but not PPAR-γ P12A, are associated with alcohol consumption in a Spanish Mediterranean population 

      Francés, F.; Verdú, Fernando; Portolés, Olga; Castello, A.; Sorlí, José V; Guillen, M.; Corella, Dolores Elsevier (2008)
      Background: Peroxisome Proliferator-Activated Receptors (PPARs) and its co-activators are regulatory elements of the cellular lipid homeostasis and have been associated with feeding behavior modulation. Animal models suggest ...

    • closedAccess   Single tube optimisation of APOE genotyping based on melting curve analysis 

      Francés, F.; Portolés, Olga; Sorlí, José V; Guillen, M.; González, José I.; Corella, Dolores Elsevier (2008)
      Objectives: To develop and validate a single-tube protocol for APOE genotyping using fluorescent probes. Design and methods: We have designed and validated a hybrid, single-tube, SimpleProbe/FRET probe protocol that takes ...

    • closedAccess   Motion Analysis with the Radon Transform on Log-Polar Images 

      Traver Roig, Vicente Javier; Pla, Filiberto Springer US (2008-02)
      Image projections provide an effective way of describing image contents or estimate particular kinds of motion. However, most (if not all) of previous literature on projections has been done on Cartesian images. In contrast, ...

    • closedAccess   Self-managed topologies in P2P networks 

      Rodero Merino, Luis; Fernández Anta, Antonio; López, Luis; Cholvi, Vicent Elsevier (2009)
      The problem of efficient resource location is an important open issue in P2P systems. This paper introduces DANTE, a self-adapting P2P system that changes its peer links to form topologies where resources are located in ...

    • closedAccess   A relevance model for a data warehouse contextualized with documents 

      Pérez Martínez, Juan Manuel; Berlanga Llavori, Rafael; Aramburu Cabo, María José Elsevier (2009)
      This paper presents a relevance model to rank the facts of a data warehouse that are described in a set of documents retrieved with an information retrieval (IR) query. The model is based in language modeling and relevance ...

    • closedAccess   Interconnection of distributed memory models 

      Cholvi, Vicent; Jiménez, Ernesto; Fernández Anta, Antonio Elsevier (2009)
      In this paper, we present a framework to formally describe and study the interconnection of distributed shared memory systems. Using it allows us to classify the consistency models in two groups, depending on whether they ...

    • closedAccess   Generating complex ontology instances from documents 

      Danger, Roxana; Berlanga Llavori, Rafael Elsevier (2009)
      This paper presents a novel Information Extraction system able to generate complex instances from free text available on the Web. The approach is based on a non-monotonical processing over ontologies, and makes use of ...

    • closedAccess   Rendering continuous level-of-detail meshes by Masking Strips 

      Ripollés Mateu, Oscar Enrique; Chover, Miguel; Gumbau Portalés, Jesús; Ramos, Jose Francisco; Puig Centelles, Anna Elsevier (2009)
      In this paper we present a new continuous multiresolution approach which has been developed for the interactive visualization of meshes in real-time applications. Our interest is to offer an efficient solution which considers ...

    • closedAccess   Efficient retrieval of ontology fragments using an interval labeling scheme 

      Nebot Romero, Victoria; Berlanga Llavori, Rafael Elsevier (2009)
      Nowadays very large domain ontologies are being developed in life-science areas like Biomedicine, Agronomy, Astronomy, etc. Users and applications can benefit enormously from these ontologies in very different tasks, such ...

    • closedAccess   User-assisted simplification method for triangle meshes preserving boundaries 

      González, Carlos; Gumbau Portalés, Jesús; Chover, Miguel; Ramos, Jose Francisco; Quirós Bauset, Ricardo Elsevier (2009)
      This paper proposes a user-assisted mesh simplification method applied to CAD models converted to triangle meshes. This work offers the possibility of simplifying each subobject independently and at different levels of ...

    • openAccess   Information theory tools for viewpoint selection, mesh saliency and geometry simplification 

      Sbert Casasayas, Mateu; Feixas, Miguel; Castelló Boscá, Pascual; Chover, Miguel Springer (2009)
      In this chapter we review the use of an information channel as a unified framework for viewpoint selection, mesh saliency and geometry simplification. Taking the viewpoint distribution as input and object mesh polygons as ...

    • openAccess   Melodic track identification in MIDI files considering the imbalanced context 

      Martín Félez, Raúl; Mollineda, Ramón A.; García, Vicente Springer Verlag (Germany) (2009)
      In this paper, the problem of identifying the melodic track of a MIDI file in imbalanced scenarios is addressed. A polyphonic MIDI file is a digital score that consists of a set of tracks where usually only one of them ...

    • openAccess   A template-based recognition system for on-line handwritten characters 

      Prat Villar, Federico; Marzal Varó, Andrés; Martín, Sergio; Ramos Garijo, Rafael; Castro Bleda, María José Institute of Information Science, Academia Sinica (2009)
      New developments on our real-time recognition engine for isolated handwritten characters are presented. This engine is based on approximate Dynamic Time Warping comparisons with prototypes selected by fast, less accurate ...

    • openAccess   Octahedral Transforms for 3D Image Processing 

      Lenz, Reiner; Latorre Carmona, Pedro Institute of Electrical and Electronics Engineers (2009)
      The octahedral group is one of the finite subgroups of the rotation group in three-dimensional Euclidean space and a symmetry group of the cubic grid. Compression and filtering of three-dimensional volumes are given as ...

    • openAccess   Ontology integration using mappings: towards getting the right logical consequences 

      Jiménez Ruiz, Ernesto; Cuenca Grau, Bernardo; Horrocks, Ian; Berlanga Llavori, Rafael Springer Verlag (Germany) (2009)
      We propose a general method and novel algorithmic techniques to facilitate the integration of independently developed ontologies using mappings. Our method and techniques aim at helping users understand and evaluate the ...

    • openAccess   Multidimensional integrated ontologies: a framework for designing semantic data warehouses 

      Nebot Romero, Victoria; Berlanga Llavori, Rafael; Pérez Martínez, Juan Manuel; Aramburu Cabo, María José; Pedersen, Torben Bach Springer Verlag (Germany) (2009)
      The Semantic Web enables companies and organizations to gather huge amounts of valuable semantically annotated data concerning their subjects of interest. Nowadays, many applications attach metadata and semantic annotations ...

    • openAccess   Exploring early classification strategies of streaming data with delayed attributes 

      Millán Giraldo, Mónica; Sánchez Garreta, Josep Salvador; Traver Roig, Vicente Javier Springer Verlag (Germany) (2009)
      In contrast to traditional machine learning algorithms, where all data are available in batch mode, the new paradigm of streaming data poses additional difficulties, since data samples arrive in a sequence and many hard ...

    • openAccess   Filter banks for hyperspectral pixel classification of satellite images 

      Rajadell Rojas, Olga; García-Sevilla, Pedro; Pla, Filiberto Springer Verlag (Germany) (2009)
      Satellite hyperspectral imaging deals with heterogenous images containing different texture areas. Filter banks are frequently used to characterize textures in the image performing pixel classification. This filters are ...

    • openAccess   Dealing with inaccurate face detection for automatic gender recognition with partially occluded faces 

      Andreu Cabedo, Yasmina; García-Sevilla, Pedro; Mollineda, Ramón A. Springer Verlag (Germany) (2009)
      Gender recognition problem has not been extensively studied in situations where the face cannot be accurately detected and it also can be partially occluded. In this contribution, a comparison of several characterisation ...

    • openAccess   Use of ensemble based on GA for imbalance problem 

      Cleofás Sánchez, Laura; Valdovinos Rosas, Rosa María; García, Vicente; Alejo Eleuterio, Roberto Springer Verlag (Germany) (2009)
      In real-world applications, it has been observed that class imbalance (significant differences in class prior probabilities) may produce an important deterioration of the classifier performance, in particular with patterns ...