Enviaments recents

  • Global atmospheric dynamics investigated by using Hilbert frequency analysis 

    Zappala, Dario; Barreiro, Marcelo; Masoller Alonso, Cristina (2016-11-16)
    Article
    Accés obert
    The Hilbert transform is a well-known tool of time series analysis that has been widely used to investigate oscillatory signals that resemble a noisy periodic oscillation, because it allows instantaneous phase and frequency ...
  • Unravelling the community structure of the climate system by using lags and symbolic time-series analysis 

    Tirabassi, Giulio; Masoller Alonso, Cristina (Macmillan Publishers, 2016-07-11)
    Article
    Accés obert
    Many natural systems can be represented by complex networks of dynamical units with modular structure in the form of communities of densely interconnected nodes. Unraveling this community structure from observed data ...
  • Unveiling temporal correlations characteristic to phase transition in the output intensity of a fiber laser 

    Aragoneses, Andrés; Carpi, Laura; Tarasov, N.; Churkin, D.V.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina; Turitsyn, S.K. (2016-01-22)
    Article
    Accés obert
    We use advanced statistical tools of time-series analysis to characterize the dynamical complexity of the transition to optical wave turbulence in a fiber laser. Ordinal analysis and the horizontal visibility graph applied ...
  • Formation of high-order acoustic Bessel beams by spiral diffraction gratings 

    Jimenez, Noe; Pico Vila, Rubén; Sánchez Morcillo, Victor José; Romero García, Vicenç; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2016-11-23)
    Article
    Accés obert
    The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically, and experimentally reported in this paper. These beams are ...
  • Asymmetric light transmission in PT-Symmetric microring resonators 

    Giden, I.; Dadashi, Kh.; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis; Kurt, Hamza (2016-03-15)
    Article
    Accés restringit per política de l'editorial
    We propose a new type of add-drop microring resonator made of gain and loss materials. Microring resonators are compact, narrow band, and optical channel dropping filters. In such linear systems, light transmission to ...
  • Quantification of network structural dissimilarities 

    Schieber, Tiabo A.; Carpi, Laura; Díaz Guilera, Albert; Pardalos, Panos M.; Masoller Alonso, Cristina; Ravetti, Martin G. (2017-01-09)
    Article
    Accés obert
    Identifying and quantifying dissimilarities among graphs is a fundamental and challenging problem of practical importance in many fields of science. Current methods of network comparison are limited to extract only partial ...
  • Analysis of noise-induced temporal correlations in neuronal spike sequences 

    Reinoso, Jose A.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2016-11-01)
    Article
    Accés restringit per política de l'editorial
    We investigate temporal correlations in sequences of noise-induced neuronal spikes, using a symbolic method of time-series analysis. We focus on the sequence of time-intervals between consecutive spikes (inter-spike-intervals, ...
  • Transition between functional regimes in an integrate-and-fire network model of the thalamus 

    Barardi, Alessandro; García Ojalvo, Jordi; Mazzoni, Alberto (2016-09-06)
    Article
    Accés obert
    The thalamus is a key brain element in the processing of sensory information. During the sleep and awake states, this brain area is characterized by the presence of two distinct dynamical regimes: in the sleep state activity ...
  • Temporally correlated fluctuations drive epileptiform dynamics 

    Jedynak, Maciej; Pons Rivero, Antonio Javier; García Ojalvo, Jordi; Goodfellow, Marc (2017-02-01)
    Article
    Accés obert
    Macroscopic models of brain networks typically incorporate assumptions regarding the characteristics of afferent noise, which is used to represent input from distal brain regions or ongoing fluctuations in non-modelled ...
  • Quantitative identification of dynamical transitions in a semiconductor laser with optical feedback 

    Quintero Quiroz, Carlos Alberto; Tiana Alsina, Jordi; Roma, Josep; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (Macmillan Publishers, 2016-11-18)
    Article
    Accés obert
    Identifying transitions to complex dynamical regimes is a fundamental open problem with many practical applications. Semi- conductor lasers with optical feedback are excellent testbeds for studying such transitions, as ...

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