Horizontal Visibility graphs generated by type-I intermittency

The type-I intermittency route to (or out of) chaos is investigated within the Horizontal Visibility graph theory. For that purpose, we address the trajectories generated by unimodal maps close to an inverse tangent bifurcation and construct, according to the Horizontal Visibility algorithm, their associated graphs. We show how the alternation of laminar episodes and chaotic bursts has a fingerprint in the resulting graph structure. Accordingly, we derive a phenomenological theory that predicts quantitative values of several network parameters. In particular, we predict that the characteristic power law scaling of the mean length of laminar trend sizes is fully inherited in the variance of the graph degree distribution, in good agreement with the numerics. We also report numerical evidence on how the characteristic power-law scaling of the Lyapunov exponent as a function of the distance to the tangent bifurcation is inherited in the graph by an analogous scaling of the block entropy over the degree distribution. Furthermore, we are able to recast the full set of HV graphs generated by intermittent dynamics into a renormalization group framework, where the fixed points of its graph-theoretical RG flow account for the different types of dynamics. We also establish that the nontrivial fixed point of this flow coincides with the tangency condition and that the corresponding invariant graph exhibit extremal entropic properties.Comment: 8 figure

The granites of Galicia used as industrial rock

[Resumen] Se han estudiado todos los tipos de rocas graníticas de la Comunidad Autónoma de Galicia para su utilización como roca industrial: áridos y piedra natural. El mercado de los áridos y la industria de la Piedra Natural son dos subsectores mineros de primer orden, tanto en Galicia como en el resto de España, con producciones globales en granitoides de 10 Mt (millones de toneladas) y un valor anual cercano a los 31.000 Mpts (millones de pesetas) para Galicia. Los tipos litológicos beneficiados son: granitoides inhomogéneos, granitos de dos micas, granitos biot1ticos y ortogneises, cuyas diferencias petrológicas, texturales y mineralógicas van a condicionar su nivel de calidad en uno y otro mercado.[Abstract] We have studied aH the types of granitic rocks of the region of Galicia, for their use as an industrial rock in aggregates and natural stone. The aggregate market and the natural stone industry are very important mining subsection, as much in Galicia as in the rest of Spain, with general granite productions of 10 Mt (millions of tonnes) and 31.000 Mpts (miHions of pesetas) as the annual value in Galicia. The types of mining rocks are: inhomogeneous granite, two mica granite, biotite granite and granite gneiss, whose petrological, textural and mineralogical differences determine their quality level in both uses

Mobile Applications Incidence in the Decision Making of Potential Tourists in Huelva City

El presente trabajo presenta un análisis sobre los hábitos de consumo y del proceso de compra/reservas de productos o servicios turísticos a través de aplicaciones móviles en Huelva capital. Entre los resultados más significativos se pudo encontrar que 52,04% de los potenciales turistas utilizan las aplicaciones móviles, siendo totalmente determinante en su decisión de compra los comentarios y opiniones de otros turistas en dichas plataformas, así como las fotografías del destino a escoger, aun entendiendo que dichas informaciones suelen ser falsas o manipuladas.This paper presents an analysis of spending habits and buying process of travel services through mobile applications in Huelva city. Among the most significant results can be found that 52.04% of potential tourists use mobile applications, being fully decisive in their decision to purchase the comments and opinions of other tourists on these platforms, as well as photographs of the destination you choose, while they are understanding that such information often false or manipulated

Ontology-based context representation and reasoning for object tracking and scene interpretation in video

Computer vision research has been traditionally focused on the development of quantitative techniques to calculate the properties and relations of the entities appearing in a video sequence. Most object tracking methods are based on statistical methods, which often result inadequate to process complex scenarios. Recently, new techniques based on the exploitation of contextual information have been proposed to overcome the problems that these classical approaches do not solve. The present paper is a contribution in this direction: we propose a Computer Vision framework aimed at the construction of a symbolic model of the scene by integrating tracking data and contextual information. The scene model, represented with formal ontologies, supports the execution of reasoning procedures in order to: (i) obtain a high-level interpretation of the scenario; (ii) provide feedback to the low-level tracking procedure to improve its accuracy and performance. The paper describes the layered architecture of the framework and the structure of the knowledge model, which have been designed in compliance with the JDL model for Information Fusion. We also explain how deductive and abductive reasoning is performed within the model to accomplish scene interpretation and tracking improvement. To show the advantages of our approach, we develop an example of the use of the framework in a video-surveillance application.This work was supported in part by Projects CICYT TIN2008- 06742-C02-02/TSI, CICYT TEC2008-06732-C02-02/TEC, SINPROB, CAM MADRINET S-0505/TIC/0255 and DPS2008–07029-C02–02.Publicad

Silent Speech Interfaces for Speech Restoration: A Review

This work was supported in part by the Agencia Estatal de Investigacion (AEI) under Grant PID2019-108040RB-C22/AEI/10.13039/501100011033. The work of Jose A. Gonzalez-Lopez was supported in part by the Spanish Ministry of Science, Innovation and Universities under Juan de la Cierva-Incorporation Fellowship (IJCI-2017-32926).This review summarises the status of silent speech interface (SSI) research. SSIs rely on non-acoustic biosignals generated by the human body during speech production to enable communication whenever normal verbal communication is not possible or not desirable. In this review, we focus on the first case and present latest SSI research aimed at providing new alternative and augmentative communication methods for persons with severe speech disorders. SSIs can employ a variety of biosignals to enable silent communication, such as electrophysiological recordings of neural activity, electromyographic (EMG) recordings of vocal tract movements or the direct tracking of articulator movements using imaging techniques. Depending on the disorder, some sensing techniques may be better suited than others to capture speech-related information. For instance, EMG and imaging techniques are well suited for laryngectomised patients, whose vocal tract remains almost intact but are unable to speak after the removal of the vocal folds, but fail for severely paralysed individuals. From the biosignals, SSIs decode the intended message, using automatic speech recognition or speech synthesis algorithms. Despite considerable advances in recent years, most present-day SSIs have only been validated in laboratory settings for healthy users. Thus, as discussed in this paper, a number of challenges remain to be addressed in future research before SSIs can be promoted to real-world applications. If these issues can be addressed successfully, future SSIs will improve the lives of persons with severe speech impairments by restoring their communication capabilities.Agencia Estatal de Investigacion (AEI) PID2019-108040RB-C22/AEI/10.13039/501100011033Spanish Ministry of Science, Innovation and Universities under Juan de la Cierva-Incorporation Fellowship IJCI-2017-3292

Diferencias entre equipos ganadores y perdedores de fútbol en función del tipo de partido mediante el estudio de indicadores de rendimiento

The aim of the present study was to identify the performance indicators that best discriminated between winning and losing teams in elite balanced and unbalanced football maches. The analysis was based on 64 matches played during the World Cup tournaments held in Germany 2006. The performance indicators gathered were: actions inside the goal area, shots off goal, shots on goal, effectiveness, crosses, offsides, corners, crosses to the goal area, fouls committed, penalties, yellow and red cards, turnovers, steals, saves. The discriminant analysis of these matches showed that: the variables that best discriminated the winning and losing teams in balanced games were the actions inside the goal area, the crosses to the goal area and corners against; and the variable that best discriminated the winning and losing teams in unbalanced games was the crosses to the goal area. These results suggest that game type affects the teams' performance and consequently the game styles. This information may be useful to both coaches and performance analysts, increasing the knowledge about football performance indicators and allow to improve the training process.El objetivo del presente estudio fue analizar las diferencias en los indicadores de rendimiento final de partido (ganar y perder) de los equipos de fútbol en función del tipo de partido (equilibrados y desequilibrados). El análisis se realiza estudiando los 64 partidos disputados en el Campeonato de Mundo de Alemania de 2006. Los indicadores de rendimiento que se analizaron fueron remates fuera de la portería, remates a portería, fueras de juego, asistencias, centros al área, jugadas en el área, penaltis cometidos, faltas cometidas, tarjetas amarillas y rojas, balones perdidos y recuperados, centros al área de gol, intervenciones del portero y córner en contra. Los resultados del análisis discriminante mostraron que las variables que mejor diferencian entre equipos ganadores y perdedores cuando juegan partidos equilibrados, son las jugadas en el área, los centros al área de gol, los córners en contra, y las intervenciones del portero. Mientras que diferenciando los mismos grupos cuando juegan partidos desequilibrados, la única variable que mejor les diferencian son los centros al área de gol. De todos los análisis realizados, se observa que la única variable que discrimina todos los grupos son los centros al área de gol. Los resultados diferenciando en función del tipo de partido permiten conocer con mayor detalle qué indicadores son los más relevantes para obtener el rendimiento y cómo mejorar los procesos de entrenamiento en ataque y defensa para afrontar con mejores garantías cada contexto específico de juego

Ontological representation of context knowledge for visual data fusion

8 pages, 4 figures.-- Contributed to: 12th International Conference on Information Fusion, 2009 (FUSION '09, Seattle, Washington, US, Jul 6-9, 2009).Context knowledge is essential to achieve successful information fusion, especially at high JDL levels. Context can be used to interpret the perceived situation, which is required for accurate assessment. Both types of knowledge, contextual and perceptual, can be represented with formal languages such as ontologies, which support the creation of readable representations and reasoning with them. In this paper, we present an ontology-based model compliant with JDL to represent knowledge in cognitive visual data fusion systems. We depict the use of the model with an example on surveillance. We show that such a model promotes system extensibility and facilitates the incorporation of humans in the fusion loop.This work was supported in part by Projects CICYT TIN2008-06742-C02-02/TSI, CICYT TEC2008-06732-C02-02/TEC, SINPROB, CAM MADRINET S-0505/TIC/0255 and DPS2008-07029-C02-02.Publicad

Communication in distributed tracking systems: an ontology-based approach to improve cooperation

Current Computer Vision systems are expected to allow for the management of data acquired by physically distributed cameras. This is especially the case for modern surveillance systems, which require communication between components and a combination of their outputs in order to obtain a complete view of the scene. Information fusion techniques have been successfully applied in this area, but several problems remain unsolved. One of them is the increasing need for coordination and cooperation between independent and heterogeneous cameras. A solution to achieve an understanding between them is to use a common and well-defined message content vocabulary. In this research work, we present a formal ontology aimed at the symbolic representation of visual data, mainly detected tracks corresponding to real-world moving objects. Such an ontological representation provides support for spontaneous communication and component interoperability, increases system scalability and facilitates the development of high-level fusion procedures. The ontology is used by the agents of Cooperative Surveillance Multi-Agent System, our multi-agent framework for multi-camera surveillance systems.This work was supported in part by Projects CICYT TIN2008-06742-C02-02=TSI, CICYT TEC2008-06732-C02-02=TEC, CAM CONTEXTS (S2009=TIC-1485) and DPS2008-07029-C02-02.Publicad

Goals scored and received in 5vs4 GK game strategy are constrained by critical moment and situational variables in elite futsal

The aim of this study was to identify the importance and meaning of goals using the goalkeeper as an outfield player in elite futsal according to critical and situational variables. The sample consisted of 11,446 actions corresponding to 1,325 matches from the 1st division Spanish Futsal League during the seasons from 2010 to 2015. Multinomial logistic regression and classification tree multivariate models were used to identify the best predictor variables related to the likelihood of scoring goals, receiving goals, or no goals. Results from Multinomial logistic regression emphasised goals scored in balanced matches and playing with the goalkeeper as an outfield player before the last eight minutes. When the teams were drawing or losing, finished with goals received or without goals. The classification tree results identified a greater likelihood of scoring goals when the teams were winning, in balanced matches, and within the last eight minutes. Conversely, a greater likelihood of suffering goals was observed using the goalkeeper as an outfield player when the teams were losing, in unbalanced matches and in the last eight minutes. The identified trends will allow futsal coaches to recognise the most suitable situations for achieving efficacy when using the goalkeeper as an outfield player strategy.info:eu-repo/semantics/publishedVersio