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Browsing Recerca: articles, congressos, llibres by Title

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  • Eeckhout, Jan; Jovanovic, Boyan (Elsevier, 2012)
    The rise in world trade since 1970 has been accompanied by a rise in the geographic span of control of management and, hence, also a rise in the e ective international mobility of labor services. We study the e ect of such ...
  • Cramer, Ronald; Daza, Vanesa; Gracia, Ignacio; Jiménez Urroz, Jorge; Leander, Gregor; Martí-Farré, Jaume; Padró, Carles (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Error-correcting codes and matroids have been widely used in the study of ordinary secret sharing schemes. In this paper, the connections between codes, matroids, and a special class of secret sharing schemes, namely, ...
  • Biglieri, Ezio; Hong, Yi; Viterbo, Emanuele (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    We focus on full-rate, fast-decodable space–time block codes (STBCs) for 2 x 2 and 4 x 2 multiple-input multiple-output (MIMO) transmission. We first derive conditions and design criteria for reduced-complexity maximum-likelihood ...
  • Sezginer, Serdar; Sari, Hikmet; Biglieri, Ezio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
    The 2×2 MIMO profiles included in Mobile WiMAX specifications are Alamouti’s space-time code (STC) fortransmit diversity and spatial multiplexing (SM). The former has full diversity and the latter has full rate, but neither ...
  • Albà Soler, Mar; Castresana, José (BioMed Central, 2007)
    Background: It has been shown in a variety of organisms, including mammals, that genes that appeared recently in evolution, for example orphan genes, evolve faster than older genes. Low functional constraints at the time ...
  • Andriyanova, Iryna; Biglieri, Ezio; Boutros, Joseph Jean (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    This paper presents our investigation on iterative decoding performances of some sparse-graph codes on block-fading Rayleigh channels. The considered code ensembles are standard LDPC codes and Root-LDPC codes, first ...
  • Daza, Vanesa; Herranz, Javier; Sáez, Germán (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    In a distributed key distribution scheme, a set of servers helps a set of users in a group to securely obtain a common key. Security means that an adversary who corrupts some servers and some users has no information about ...
  • Torner Castells, Sergi (Walter de Gruyter, 2005)
    The morphological status of adverbs ending in -mente in Spanish (-ly in English) has been the object of many studies and continues to be the subject of debate. The two main proposals regarding the morphology of these adverbs ...
  • Serra, Xavier (Universitat Pompeu Fabra, 2012)
    The current research in Music Information Retrieval (MIR) is showing the potential that the Information Technologies can have in music related applications. A major research challenge in that direction is how to ...
  • Lozano Solsona, Àngel; Jindal, Nihar (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    The optimization of the pilot overhead in wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interest (e.g., fading rate, signal-to-noise ratio) is quantified. The ...
  • Lozano Solsona, Àngel; Tulino, Antonia M.; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    This paper formulates power allocation policies that maximize the region of mutual informations achievable in multiuser downlink OFDM channels. Arbitrary partitioning of the available tones among users and arbitrary ...
  • Lozano Solsona, Àngel; Tulino, Antonia M.; Verdú, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2006)
    The mutual information of independent parallel Gaussian-noise channels is maximized, under an average power constraint, by independent Gaussian inputs whose power is allocated according to the waterfilling policy. In ...
  • Hernández Leo, Davinia; Nieves, Raul; Arroyo, Ernesto; Rosales, Andrea; Melero Merino, Javier; Moreno, Pau; Blat, Josep (Springer, 2011)
    The orchestration of collaborative learning processes in face-to-face physical settings, such as classrooms, requires teachers to coordinate students indicating them who belong to each group, which collaboration areas ...
  • Martínez Cortés, G.; Nuño Arana, I.; Rubi Castellanos, R.; Vilchis Dorantes, G.; Luna Vázquez, A.; Coral Vázquez, R. M.; Canto Cetina, T.; Salazar Flores, J.; Muñoz Valle, J. F.; Sandoval Mendoza, Karla; López, Z.; Gamero Lucas, J. J.; Rangel Villalobos, H. (Informa Healthcare, 2010)
    BACKGROUND: CODIS-STRs in Native Mexican groups have rarely been analysed for human identification and anthropological purposes. AIM: To analyse the genetic relationships and population structure among three Native Mexican ...
  • Masquelier, Timothée; Hugues, Etienne; Deco, Gustavo; Thorpe, Simon J. (Society for Neuroscience, 2009)
    Recent experiments have established that information can be encoded in the spike times of neurons relative to the phase of a background oscillation in the local field potential—a phenomenon referred to as “phase-of-firing ...
  • Furlong, Laura I.; Dach, Holger; Hofmann Apitius, Martin; Sanz, Ferran (BioMed Central, 2008)
    Background: Single Nucleotide Polymorphisms, among other type of sequence variants, constitute key elements in genetic epidemiology and pharmacogenomics. While sequence data about genetic variation is found at databases ...
  • Morales-Jiménez, David; Paris, José F.; Lozano Solsona, Àngel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Exact closed-form expressions are obtained for the outage probability of maximal ratio combining in η-μ fading channels with antenna correlation and co-channel interference. The scenario considered in this work assumes ...
  • Andriyanova, Iryna; Biglieri, Ezio; Boutros, Joseph Jean (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    This paper derives approximations allowing the estimation of outage probability for standard irregular LDPC codes and full-diversity Root-LDPC codes used over nonergodic block-fading channels. Two separate approaches are ...
  • Bel Rafecas, Núria; Poch, Marc; Toral, Antonio (European Association for Machine Translation, 2012)
    The objective of PANACEA is to build a factory of LRs that automates the stages involved in the acquisition, production, updating and maintenance of LRs required by MT systems and by other applications based on language ...
  • Ortega, Guadalupe; Castellà, Cristina; Martin Cantera, Carlos; Ballvé, José L.; Díaz, Estela; Saez, Marc; Lozano, Juan; Rofes, Lourdes; Morera, Concepció; Barceló, Antònia; Cabezas, Carmen; Pascual, José A.; Perez Ortuño, Raúl; Saltó, Esteve; Valverde, Araceli; Jané, Mireia; BIBE Study Group (BioMed Central, 2010)
    Background: There is evidence that exposure to passive smoking in general, and in babies in particular, is an important cause of morbimortality. Passive smoking is related to an increased risk of pediatric diseases such ...

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