• Understanding and leveraging the impact of response latency on user behaviour in web wearch

  Arapakis, Ioannis; Cambazoglu, B. Barla; Freire, Ana (ACM Association for Computer Machinery, 2017)

  The interplay between the response latency of web search systems and users’ search experience has only recently started to attract research attention, despite the important implications of response latency on monetisation ...
• Avoiding nerve stimulation in irreversible electroporation: a numerical modeling study

  Mercadal Cavaller, Borja; Arena, Christopher B.; Davalos, Rafael V.; Ivorra Cano, Antoni, 1974- (Institute of Physics (IOP), 2017)

  Electroporation based treatments consist in applying one or multiple high voltage pulses to the tissues to be treated. As an undesired side effect, these pulses cause electrical stimulation of excitable tissues such as ...
• Multimedia retrieval based on non-linear graph-based fusion and partial least squares regression

  Gialampoukidis, Ilias; Moumtzidou, Anastasia; Liparas, Dimitris; Tsikrika, Theodora; Vrochidis, Stefanos; Kompatsiaris, Ioannis (Springer, 2017)

  Heterogeneous sources of information, such as images, videos, text and metadata are often used to describe di erent or complementary views of the same multimedia object, especially in the online news domain and in ...
• Multiple ARQ processes for MIMO systems

  Zheng, Haitao; Lozano Solsona, Angel; Haleem, Mohamed (Hindawi, 2004)

  We propose a new automatic repeat request (ARQ) scheme for MIMO systems with multiple transmit and receive antennas. The substreams emitted from various transmit antennas encounter distinct propagation channels and thus ...
• Using jitter and shimmer in speaker verification

  Farrús, Mireia; Hernando, Javier (Institution of Engineering and Technology (IET), 2009)

  Jitter and shimmer are measures of the fundamental frequency and amplitude cycle-to-cycle variations, respectively. Both features have been largely used for the description of pathological voices, and since they characterise ...
• Fusing prosodic and acoustic information for speaker recognition

  Farrús, Mireia (Equinox Publishing, 2009)

  Automatic speaker recognition is the use of a machine to identify an individual from a spoken sentence. Recently, this technology has been increasingly used in applications such as access control, transaction authentication, ...
• Automatic speaker recognition as a measurement of voice imitation and conversion

  Farrús, Mireia; Wagner, Michael; Erro, Daniel; Hernando, Javier (Equinox Publishing, 2010)

  Voices can be deliberately disguised by means of human imitation or voice conversion. The question arises as to what extent they can be modified by using either of both methods. In the current paper, a set of speaker ...
• Overcoming statistical machine translation limitations: error analysis and proposed solutions for the Catalan–Spanish language pair

  Farrús, Mireia; Costa-jussà, Marta R.; Mariño Acebal, José B.; Poch, Marc; Hernández, Adolfo; Henríquez, Carlos; Fonollosa, José A Rodriguez (Springer, 2011)

  This work aims to improve an N-gram-based statistical machine translation system between the Catalan and Spanish languages, trained with an aligned Spanish-Catalan parallel corpus consisting of 1.7 million sentences taken ...
• Robustness and versatility of a nonlinear interdependence method for directional coupling detection from spike trains

  Malvestio, Irene; Kreuz, Thomas; Andrzejak, Ralph Gregor (American Physical Society, 2017)

  The detection of directional couplings between dynamics based onmeasured spike trains is a crucial problem in the understanding of many different systems. In particular, in neuroscience it is important to assess the ...
• The dynamics of resting fluctuations in the brain: metastability and its dynamical cortical core

  Deco, Gustavo; Kringelbach, Morten L.; Jirsa, Viktor K.; Ritter, Petra (Nature Publishing Group, 2017)

  In the human brain, spontaneous activity during resting state consists of rapid transitions between functional network states over time but the underlying mechanisms are not understood. We use connectome based computational ...
• Analysis of the impact of a tag recommendation system in a real-world folksonomy

  Font, Frederic; Serrà Julià, Joan; Serra, Xavier (ACM Association for Computer Machinery, 2015)

  Collaborative tagging systems have emerged as a successful solution for annotating contributed resources to online sharing platforms, facilitating searching, browsing, and organizing their contents. To aid users in the ...
• Evolutionary optimization of network reconstruction from derivative-variable correlations

  Leguia, Marc G.; Andrzejak, Ralph Gregor; Levnajić, Zoran (Institute of Physics (IOP), 2017)

  Topologies of real-world complex networks are rarely accessible, but can often be reconstructed from experimentally obtained time series via suitable network reconstruction methods. Extending our earlier work on methods ...
• Linking entropy at rest with the underlying structural connectivity in the healthy and lesioned brain

  Saenger, Victor M.; Ponce-Alvarez, Adrián; Adhikari, Mohit H.; Hagmann, Patric; Deco, Gustavo; Corbetta, Maurizzio (Oxford University Press, 2017)

  The brain is a network that mediates information processing through a wide range of states. The extent of state diversity is a reflection of the entropy of the network. Here we measured the entropy of brain regions (nodes) ...
• The most relevant human brain regions for functional connectivity: evidence for a dynamical workspace of binding nodes from whole-brain computational modelling

  Deco, Gustavo; Van Hartevelt, Tim J.; Fernandes, Henrique M.; Stevner, Angus B. A.; Kringelbach, Morten L. (Elsevier, 2017)

  In order to promote survival through flexible cognition and goal-directed behaviour, the brain has to optimize segregation and integration of information into coherent, distributed dynamical states. Certain organizational ...
• Cortical rich club regions can organize state-dependent functional network formation by engaging in oscillatory behavior

  Senden, Mario; Reuter, Niels; Heuvel, Martijn van den; Goebel, Rainer; Deco, Gustavo (Elsevier, 2017)

  Cognition is hypothesized to require the globally coordinated, functionally relevant integration of otherwise segregated information processing carried out by specialized brain regions. Studies of the macroscopic connectome ...
• Neural correlates of metacognition: a critical perspective on current tasks

  Insabato, Andrea; Pannunzi, Mario; Deco, Gustavo (Elsevier, 2016)

  Humans have a remarkable ability to reflect upon their behavior and mental processes, a capacity known as metacognition. Recent neurophysiological experiments have attempted to elucidate the neural correlates of metacognition ...
• Single or multiple frequency generators in on-going brain activity: a mechanistic whole-brain model of empirical MEG data

  Deco, Gustavo; Cabral, Joana R. B.; Woolrich, Mark; Stevner, Angus B. A.; Van Hartevelt, Tim J.; Kringelbach, Morten L. (Elsevier, 2017)

  During rest, envelopes of band-limited on-going MEG signals co-vary across the brain in consistent patterns, which have been related to resting-state networks measured with fMRI. To investigate the genesis of such envelope ...
• How structure sculpts function: unveiling the contribution of anatomical connectivity to the brain's spontaneous correlation structure

  Bettinardi, Ruggero G.; Deco, Gustavo; Karlaftis, Vasileios M.; Van Hartevelt, Tim J.; Fernandes, Henrique M.; Kourtzi, Zoe; Kringelbach, Morten L.; Zamora-López, Gorka (American Institute of Physics (AIP), 2017)

  Intrinsic brain activity is characterized by highly organized co-activations between different regions, forming clustered spatial patterns referred to as resting-state networks. The observed co-activation patterns are ...
• Non-reward neural mechanisms in the orbitofrontal cortex

  Rolls, Edmund T; Deco, Gustavo (Elsevier, 2016)

  Single neurons in the primate orbitofrontal cortex respond when an expected reward is not obtained, and behaviour must change. The human lateral orbitofrontal cortex is activated when non-reward, or loss occurs. The neuronal ...
• Environmental factors linked to depression vulnerability are associated with altered cerebellar resting-state synchronization

  Córdova Palomera, Aldo; Tornador Antolin, Cristian, 1979-; Falcón, Carles; Bargallo, Nuria; Brambilla, Paolo; Crespo-Facorro, Benedicto; Deco, Gustavo; Fañanás Saura, Lourdes (Nature Publishing Group, 2016)

  Hosting nearly eighty percent of all human neurons, the cerebellum is functionally connected to large regions of the brain. Accumulating data suggest that some cerebellar resting-state alterations may constitute a key ...

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