Browsing Articles (Departament de Tecnologies de la Informació i les Comunicacions) by Title

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Browsing Articles (Departament de Tecnologies de la Informació i les Comunicacions) by Title

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  • Zhang, Chong; Villa-Uriol, Maria-Cruz; De Craene, Mathieu; Pozo Soler, José Ma. (José María); Macho, Juan M.; Frangi Caregnato, Alejandro; Universitat Pompeu Fabra (American Association of Physicists in Medicine (AAPM), 2011)
    Purpose: The objective of this study is to investigate the feasibility of detecting and quantifying 3D cerebrovascular wall motion from a single 3D rotational x-ray angiography (3DRA) acquisition within a clinically ...
  • Balocco, Simone; Basset, Olivier; Courbebaisse, Guy; Boni, Enrico; Frangi Caregnato, Alejandro; Tortoli, Piero; Cachard, Christian (Institute of Physics (IOP), 2010)
    Human arteries affected by atherosclerosis are characterized by altered wall viscoelastic properties. The possibility of noninvasively assessing arterial viscoelasticity in vivo would significantly contribute to the early ...
  • Maestre Gómez, Esteban; Ramírez, Rafael; Kersten, Stefan; Serra, Xavier (MIT Press, 2009)
    Here we describe an approach to the expressive synthesis of jazz saxophone melodies that reuses audio recordings and carefully concatenates note samples. The aim is to generate an expressive audio sequence from the analysis ...
  • Hernández Leo, Davinia; Bote-Lorenzo, Miguel L.; Asensio-Pérez, Juan I.; Gómez-Sánchez, Eduardo; Villasclaras-Fernández, Eloy D.; Jorrín-Abellán, Iván M.; Dimitriadis, Yannis (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    This paper describes a Computer-Supported Collaborative Learning (CSCL) case study in engineering education carried out within the context of a network management course. The case study shows that the use of two computing ...
  • Ferradans Ramonde, Sira; Bertalmío, Marcelo; Caselles, Vicente (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    Demosaicking is a particular case of interpolation problems where, from a scalar image in which each pixel has either the red, the green or the blue component, we want to interpolate the full-color image. State-of-the-art ...
  • Lozano Solsona, Àngel; Tulino, Antonia M.; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
    The analysis of the multiantenna capacity in the high-SNR regime has hitherto focused on the high-SNR slope (or maximum multiplexing gain), which quantifies the multiplicative increase as function of the number of antennas. ...
  • Morales, Hernán G.; Kim, Minsuok; Vivas, EE; Villa-Uriol, Maria-Cruz; Larrabide, Ignacio; Sola, T; Guimaraens, Leopoldo; Frangi Caregnato, Alejandro (American Society of Neuroradiology, 2011)
    Endovascular coiling is a well-established therapy for treating intracranial aneurysms. Nonetheless, postoperative hemodynamic changes induced by this therapy remain not fully understood. The purpose of this work is to ...
  • Sebastián Gallés, Núria; Costa, Albert (Nature Publishing Group, 2014)
    The ability to speak two languages often marvels monolinguals, although bilinguals report no difficulties in achieving this feat. Here, we examine how learning and using two languages affect language acquisition and ...
  • Tulino, Antonia M.; Lozano Solsona, Àngel; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2005)
    This paper applies random matrix theory to obtain analytical characterizations of the capacity of correlated multiantenna channels. The analysis is not restricted to the popular separable correlation model, but rather it ...
  • Spa Carvajal, Carlos; Garriga, Adan; Escolano, José (Elsevier, 2009)
    The Pseudo-Spectral Time Domain (PSTD) method is an alternative time-marching method to classical leapfrog finite difference schemes in the simulation of wave-like propagating phenomena. It is based on the fundamentals ...
  • Lozano Solsona, Àngel (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Expressions relating spectral efficiency, power, and Doppler spectrum, are derived for Rayleigh-faded wireless channels with Gaussian signal transmission. No side information on the state of the channel is assumed at the ...
  • Facciolo Furlan, Gabriele; Almansa, Andrés; Aujol, Jean-François; Caselles, Vicente (SIAM (Society for Industrial and Applied Mathematics), 2009)
    We propose a restoration algorithm for band limited images that considers irregular (perturbed) sampling, denoising, and deconvolution. We explore the application of a family of regularizers that allow to control the ...
  • Dohler, Mischa; Heath, R. W., Jr.; Lozano Solsona, Àngel; Papadias, C. B.; Valenzuela, R. A. (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    This article originates from a panel with the above title, held at IEEE VTC Spring 2009, in which the authors took part. The enthusiastic response it received prompted us to discuss for a wider audience whether research ...
  • Hernández Leo, Davinia; Romeo, Lauren; Carralero, Miguel A.; Chacón, Jonathan; Carrió, Mar; Moreno, Pau; Blat, Josep (Elsevier, 2011)
    Two important challenges that teachers are currently facing are the sharing and the collaborative authoring of their learning design solutions, such as didactical units and learning materials. On the one hand, there are ...
  • Girardin, Fabien; Dal Fiore, Filippo; Ratti, Carlo; Blat, Josep (Taylor & Francis (Routledge), 2008)
    In recent years, the large deployment of mobile devices has led to a massive increase in the volume of records of where people have been and when they were there. The analysis of these spatio-temporal data can supply ...
  • Boutros, Joseph Jean; Guillén i Fàbregas, Albert; Biglieri, Ezio; Zémor, Gilles (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    We design powerful low-density parity-check (LDPC) codes with iterative decoding for the block-fading channel. We first study the case of maximum-likelihood decoding, and show that the design criterion is rather straightforward. ...
  • Bonet, Blai; Geffner, Héctor (Association for the Advancement of Artificial Intelligence (AAAI), 2005)
    We describe the version of the GPT planner to be used in the planning competition. This version, called mGPT, solves mdps specified in the ppddl language by extracting and using different classes of lower bounds, along ...
  • Zhang, Chong; Villa-Uriol, Maria-Cruz; De Craene, Mathieu; Pozo Soler, José Ma. (José María); Frangi Caregnato, Alejandro (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    This paper presents a technique to estimate and model patient-specific pulsatility of cerebral aneurysms over one cardiac cycle, using 3D rotational X-ray angiography (3DRA) acquisitions. Aneurysm pulsation is modeled as ...
  • Angelosante, Daniele; Biglieri, Ezio; Lops, Marco (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    The problem of jointly estimating the number, the identities, and the data of active users in a time-varying multiuser environment was examined in a companion paper (IEEE Trans. Information Theory, vol. 53, no. 9, September ...
  • Rusek, Fredrik; Lozano Solsona, Àngel; Jindal, Nihar (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    We present a method to compute, quickly and efficiently, the mutual information achieved by an IID (independent identically distributed) complex Gaussian signal on a block Rayleigh-faded channel without side information ...

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