Benvinguts al Repositori Digital de la UPF

Visualitzant Articles (Departament de Tecnologies de la Informació i les Comunicacions) per títol

Visualitzant Articles (Departament de Tecnologies de la Informació i les Comunicacions) per títol

Ordena per: Ordre: Resultats:

  • Sayago Barrantes, Sergio; Forbes, Paula; Blat, Josep (Taylor & Francis (Routledge), 2013)
    A growing ageing population and an increasing reliance on Information and Communication Technologies (ICT) to conduct activities associated with daily living means that addressing how older people learn to use ICT is timely ...
  • Cramer, Ronald; Daza, Vanesa; Gracia, Ignacio; Jiménez Urroz, Jorge; Leander, Gregor; Martí, Jaume, 1943-; 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, ...
  • Batard, Thomas; Bertalmío, Marcelo (SIAM (Society for Industrial and Applied Mathematics), 2014)
    We present a generalization of the Euclidean and Riemannian gradient operators to a vector bundle, a geometric structure generalizing the concept of manifold. One of the key ideas is to replace the standard differentiation ...
  • 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/nfull diversity and the latter has full rate, but neither ...
  • Costa, Albert, 1970-; Vives, Marc-Lluís; Corey, Joanna Darrow, 1986- (SAGE Publications, 2017)
    Recent research has revealed that people’s preferences, choices, and judgments are affected by whether information is presented in a foreign or a native language. Here, we review this evidence, focusing on various ...
  • 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 ...
  • Sayago Barrantes, Sergio; Rosales, Andrea; Righi, Valeria; Ferreira, Susan M.; Coleman, Graham Keith (SAGE Publications, 2016)
    While older people tend to be regarded as actual, or potential, players of digital games within literature on Game Studies, Human-Computer Interaction and Gerontechnologu, they are also often considered non-avid users of ...
  • El Ayach, Omar; Lozano Solsona, Angel; Heath, R. W., Jr. (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Interference alignment (IA) is a cooperative transmission strategy that, under some conditions,/nachieves the interference channel’s maximum number of degrees of freedom. Realizing IA gains,/nhowever, is contingent upon ...
  • Branzi, Francesca Martina, 1984-; Calabria, Marco; Boscarino, Maria Lucrezia; Costa, Albert (Elsevier, 2016)
    We explored the overlap between bilingual language control (bLC) and domain-general executive control (EC) by focusing on inhibitory control processes. We tested 62 bilinguals in linguistic and non-linguistic switching ...
  • Carrillo, José; Caselles, Vicente; Moll, Salvador (2013)
    We study the relativistic heat equation in one space dimension. We prove a local regularity result when the initial datum is locally Lipschitz in its support. We propose a numerical scheme that captures the known features ...
  • Timmer, Kalinka; Calabria, Marco; Branzi, Francesca Martina, 1984-; Baus, Cristina; Costa, Albert, 1970- (Frontiers, 2018)
    Bilingual speakers are suggested to use control processes to avoid linguistic interference from the unintended language. It is debated whether these bilingual language control (BLC) processes are an instantiation of the ...
  • Runnqvist, Elin; Strijkers, Kristof; Sadat Schaffai, Jasmin, 1982-; Costa, Albert, 1970- (Frontiers Media, 2011)
    Despite a large amount of psycholinguistic research devoted to the issue of processing differences between a first and a second language, there is no consensus regarding the locus where these emerge or the mechanism behind ...
  • Baus, Cristina; Costa, Albert, 1970- (Elsevier, 2015)
    This study investigates the temporal dynamics of sign production and how particular aspects of the signed modality influence the early stages of lexical access. To that end, we explored the electrophysiological correlates ...
  • Deco, Gustavo; Jirsa, Viktor K. (Society for Neuroscience, 2012)
    The ongoing activity of the brain at rest, i.e., under no stimulation and in absence of any task, is astonishingly highly structured into/nspatiotemporal patterns. These spatiotemporal patterns, called resting state networks, ...
  • Kappen, Hilbert J.; Gómez, Vicenç; Opper, Manfred (Springer, 2012)
    We reformulate a class of non-linear stochastic optimal control problems introduced by Todorov (in Advances in Neural Information Processing Systems, vol. 19, pp. 1369-1376, 2007) as a Kullback-Leibler (KL) minimization ...
  • Buehlmann, Andres; Deco, Gustavo (Public Library of Science (PLoS), 2010)
    In recent experimental work it has been shown that neuronal interactions are modulated by neuronal synchronization and that this modulation depends on phase shifts in neuronal oscillations. This result suggests that ...
  • Marques, Ricardo; Bouville, Christian; Bouatouch, Kadi (Wiley, 2018)
    This paper proposes optimal quadrature rules over the hemisphere for the shading integral. We leverage recent work regarding the theory of quadrature rules over the sphere in order to derive a new theoretical framework ...
  • Bahrehmand, Arash; Batard, Thomas; Marques, Ricardo; Evans, Alun Thomas; Blat, Josep (Elsevier, 2017)
    Computational design is one of the most common tasks of immersive computer graphics projects, such as games, virtual reality and special effects. Layout planning is a challenging phase of architectural design, which ...
  • Lozano Solsona, Angel; 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/nachievable in multiuser downlink OFDM channels. Arbitrary partitioning of/nthe available tones among users and arbitrary ...