Browsing Física by Issue Date
Now showing items 120 of 27

The evolutionary minority game with local coordination
(2003)"We discuss a modification of the evolutionary minority game (EMG) in which agents are placed in the nodes of a regular or a random graph. A neighborhood for each agent can thus be defined and a modification of the usual ... 
Performance of nonfibre based dispersion compensation for longhaul 10.7 Gbit/s DWDM transmission
(2004)"Nonfibre based inline dispersion compensation is employed to achieve longhaul transmission of 80 channels at 10.7 Gbit=s bit rate over 1200 km of LEAF fibre. Average system margins of more than 4 dB and small transmission ... 
Order and disorder in the local evolutionary minority game
(2005)"We study a modification of the Evolutionary Minority Game (EMG) in which agents are placed in the nodes of a regular or a random graph. A neighborhood for each agent can thus be defined and a modification of the usual ... 
Stochastic resonance and brownian ratchets
(2005)"We discuss the connections between Brownian ratchets (BR) and stochastic resonance (SR). We consider a periodic potential energy landscape with no left–right symmetry that is driven by an external force which can be ... 
Uncertainty relation for the optimization of opticalfiber transmission systems simulations
(2005)“The mathematical inequality which in quantum mechanics gives rise to the uncertainty principle between two non commuting operators is used to develop a spatial stepsize selection algorithm for the SplitStep Fourier ... 
Impact of DCF properties on system design
(2006)"The dispersioncompensating ﬁber is an important optical element of current and future optical networks. In this paper, we review the impact that various properties of dispersioncompensating ﬁbers has on the performance ... 
Why nestedness in mutualistic networks?
(2007)"We investigate the relationship between the nested organization of mutualistic systems and their robustness against the extinction of species. We establish that a nested pattern of contacts is the best possible one as far ... 
Optimum integration procedures for supercontinuum simulation
(2012)"We study numerical solutions of the generalized nonlinear Schrödinger equation (GNLSE), focusing on the advantage of integrating the nonlinear part of the equation in the frequency domain (FD), rather than in the time ... 
A geometrical view of scalar modulation instability in optical fibers
(2017)"Full models of scalar modulation instability (MI) in optical fibers available in the literature usually involve complex formulations. In this paper, we present a novel approach to the analysis of MI in optical fibers by ... 
Model selection: Using information measures from ordinal symbolic analysis to select model subgridscale parameterizations
(2017)"The use of information measures for model selection in geophysical models with subgrid parameterizations is examined. Although the resolved dynamical equations of atmospheric or oceanic global numerical models are well ... 
Influence of bottleneck lengths and position on simulated pedestrian egress
(201701)"In this paper, the problem of pedestrian egress under di erent geometries is studied by means of two numerical models. The length of the bottleneck after the exit and the distance of the exit to the lateral wall of a ... 
A simple and fast representation space for classifying complex time series
(201703)"In the context of time series analysis considerable effort has been directed towards the implementation of efficient discriminating statistical quantifiers. Very recently, a simple and fast representation space has been ... 
Evaluation of the status of rotary machines by time causal information theory quantifiers
(201703)"In this paper several causal Information Theory quantifiers, i.e. Shannon entropy, statistical complexity and Fisher information using the Bandt and Pompe permutation probability distribution, measure are applied to ... 
Simulating competitive egress of noncircular pedestrians
(201704)"We present a numerical framework to simulate pedestrian dynamics in highly competitive conditions by means of a forcebased model implemented with spherocylindrical particles instead of the traditional, symmetric disks. ... 
Characteristics and stability of soliton crystals in optical fibres for the purpose of optical frequency comb generation
(201706)"We study the properties of a soliton crystal, a bound state of several optical pulses that propagate with a fixed temporal separation through the optical fibres of the proposed approach for generation of optical frequency ... 
Permutation entropy based time series analysis: equalities in the input signal can lead to false conclusions
(201706)"A symbolic encoding scheme, based on the ordinal relation between the amplitude of neighboring values of a given data sequence, should be implemented before estimating the permutation entropy. Consequently, equalities in ... 
Clogging transition of vibrationdriven vehicles passing through constrictions
(201712)"We report experimental results on the competitive passage of elongated selfpropelled vehicles rushing through a constriction. For the chosen experimental conditions, we observe the emergence of intermittencies similar ... 
Redefining the role of obstacles in pedestrian evacuation
(2018)"The placement of obstacles in front of doors is believed to be an effective strategy to increase the flow of pedestrians, hence improving the evacuation process. Since it was first suggested, this counterintuitive feature ... 
Tunable Raman gain in midIR waveguides
(2018)"By means of theoretical analysis and numerical simulations, we show a tunable Raman gain which may find applications in a variety of fields, ranging from midIR fiber Raman lasers and supercontinuum generation to ... 
Characterization of autoregressive processes using entropic quantifiers
(201801)"The aim of the contribution is to introduce a novel information plane, the causalamplitude informational plane. As previous works seems to indicate, Bandt and Pompe methodology for estimating entropy does not allow to ...