Vicente Pérez-Muñuzuri

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– We consider the behavior of rings of unidirectionally coupled chaotic systems. When the number of oscillators in the ring is below a certain critical number the behavior of the ring is chaotic synchronized, while above this threshold an instability appears. The novel feature is that this instability may yield a chaotic rotating wave if some conditions are(More)
The behavior of uncoupled chaotic systems under the influence of external noise has been the subject of recent work. Some of these studies claim that chaotic systems driven by the same noise do synchronize, while other studies contradict this conclusion. In this work we have undertaken an experimental study of the effect of noise on identically driven(More)
Chaotic synchronization is studied in experiments performed on dynamic arrays of Chua’s circuits that are connected by using a recently introduced driving method especially suited for the design of such arrays. Namely, the driven circuit has the same number of energy storage elements as the driving circuit. The experimental results, which are supported by(More)
A nonlinear forecasting method based on the reconstruction of a chaotic strange attractor from about 1.5 years of cloud absorption data obtained from half-hourly Meteosat infrared images was used to predict the behavior of the time series 24 h in advance. The forecast values are then used by a meteorological model for daily prediction of plume transport(More)
I. Sendiña-Nadal,1,* A. P. Muñuzuri,1 D. Vives,2 V. Pérez-Muñuzuri,1 J. Casademunt,3 L. Ramı́rez-Piscina,4 J. M. Sancho,5,† and F. Sagués2 1Group of Nonlinear Physics, Faculty of Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain 2Departament de Quı́mica Fı́sica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain(More)
Spatiotemporal stochastic forcing of an ensemble system consisting of chaotic Lorenz cells diffusively coupled is analyzed. The nontrivial effects of time and length correlations on the ensemble mean error and spread are studied and the implications to new trends in weather forecast methodologies are discussed. A maximum for the forecast scores is observed(More)
The Advanced Regional Prediction System (ARPS) is applied to operational numerical weather prediction in Galicia, northwest Spain. The model is run daily for 72-h forecasts at a 10-km horizontal spacing. Located on the northwest coast of Spain and influenced by the Atlantic weather systems, Galicia has a high percentage (nearly 50%) of rainy days per year.(More)
An integrated system named METEOMOHID, developed by MeteoGalicia in the first stage of the Prestige accident in November 2002 was used successfully in an operational form to support decision making and assist in recovering tasks. Afterwards, METEOMOHID has been enhanced with the aim of developing an operational oceanography system to be used in the NW of(More)
Recently there has been considerable interest in stochastic resonance, i.e. the enhanced response of a system to an external signal induced by noise [Wiesenfeld & Moss, 1995; Gammaitoni et al., 1998; Luchinsky et al., 1998], a phenomenon in which noise has a creative role. Moreover, the influence of noise has also been studied within the context of arrays(More)