The Experts below are selected from a list of 8160 Experts worldwide ranked by ideXlab platform
Raul Hileno - One of the best experts on this subject based on the ideXlab platform.
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mastery in goal scoring t pattern detection and Polar Coordinate analysis of motor skills used by lionel messi and cristiano ronaldo
Frontiers in Psychology, 2017Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Tiago Fernandes, Raul HilenoAbstract:Research in soccer has traditionally given more weight to players' technical and tactical skills, but few studies have analyzed the motor skills that underpin specific motor actions. The objective of this study was to investigate the style of play of the world's top soccer players, Cristiano Ronaldo and Lionel Messi, and how they use their motor skills in attacking actions that result in a goal. We used and improved the easy-to-use observation instrument (OSMOS-soccer player) with 9 criteria, each one expanded to build 50 categories. Associations between these categories were investigated by T-pattern detection and Polar Coordinate analysis. T-pattern analysis detects temporal structures of complex behavioral sequences composed of simpler or directly distinguishable events within specified observation periods (time point series). Polar Coordinate analysis involves the application of a complex procedure to provide a vector map of interrelated behaviors obtained from prospective and retrospective sequential analysis. The T-patterns showed that for both players the combined criteria were mainly between the different aspects of motor skills, namely the use of lower limbs, contact with the ball using the outside of the foot, locomotion, body orientation with respect to the opponent goal line, and the criteria of technical actions and the right midfield. Polar Coordinate analysis detected significant associations between the same criteria included in the T-patterns as well as the criteria of turning the body, numerical equality with no pressure, and relative numerical superiority.
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goal scoring in soccer a Polar Coordinate analysis of motor skills used by lionel messi
Frontiers in Psychology, 2016Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Albert Canton, Raul HilenoAbstract:Soccer research has traditionally focused on technical and tactical aspects of team play, but few studies have analyzed motor skills in individual actions, such as goal scoring. The objective of this study was to investigate how Lionel Messi, one of the world's top soccer players, uses his motor skills and laterality in individual attacking actions resulting in a goal. We analyzed 103 goals scored by Messi between over a decade in three competitions: La Liga (n = 74), Copa del Rey (n = 8), and the UEFA Champions League (n = 21). We used an ad-hoc observation instrument (OSMOS-soccer player) comprising 10 criteria and 50 categories; Polar Coordinate analysis, a powerful data reduction technique, revealed significant associations for body part and orientation, foot contact zone, turn direction, and locomotion. No significant associations were observed for pitch area or interaction with opponents. Our analysis confirms significant associations between different aspects of motor skill use by Messi immediately before scoring, namely use of lower limbs, foot contact zones, turn direction, use of wings, and orientation of body to move toward the goal. Studies of motor skills in soccer could shed light on the qualities that make certain players unique.
Teresa M Anguera - One of the best experts on this subject based on the ideXlab platform.
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a mixed methods framework for psychoanalytic group therapy from qualitative records to a quantitative approach using t pattern lag sequential and Polar Coordinate analyses
Frontiers in Psychology, 2020Co-Authors: Eulalia Ariaspujol, Teresa M AngueraAbstract:Conducted within a mixed methods framework, this study focuses on the conversation-facilitation role of a lead therapist during group psychotherapy with adolescents. Conversation is an essential component of psychoanalytic psychotherapies and there is growing interest in describing and studying the impact of conversational techniques. One way to do this is to report on specific approaches, such as questioning, paraphrasing, and mentalization in intervention turns and to analyze their impact on the therapist-patient relationship. The main aim of this study was to investigate differences in communication strategies used by a lead therapist in the early and late stages of therapy with six adolescents aged 13-15 years. We employed a mixed methods design based on systematic direct observation supplemented by indirect observation. The observational methodology design was nomothetic, follow-up, and multidimensional. The choice of methodology is justified on the basis of our use of an ad hoc observation instrument for communication strategies, combining a field format and a category system. We analyzed interobserver agreement quantitatively by Cohen’s kappa using GSEQ5 software. Following confirmation of the reliability of the data, we analyzed the lead therapist’s conversation-facilitation techniques in sessions 5 and 29 of a 30-session program, quantitatively analyzing what were initially qualitative data using T-pattern detection (THEME v.6 Edu software), lag sequential analysis (GSEQ5 software), and Polar Coordinate analysis (HOISAN v. 1.6.3.3.6. software and R software),. The results show changes in the techniques used from the start to the end of therapy. Of the 28 communication strategies analyzed, three were particularly common: questioning and paraphrasing in session 5 and questioning and mentalization in session 29. This mixed methods study shows that combined use of T-pattern detection, lag sequential analysis, and Polar Coordinate analysis can offer meaningful and objective insights into group psychotherapy through the lens of the therapist.
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mastery in goal scoring t pattern detection and Polar Coordinate analysis of motor skills used by lionel messi and cristiano ronaldo
Frontiers in Psychology, 2017Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Tiago Fernandes, Raul HilenoAbstract:Research in soccer has traditionally given more weight to players' technical and tactical skills, but few studies have analyzed the motor skills that underpin specific motor actions. The objective of this study was to investigate the style of play of the world's top soccer players, Cristiano Ronaldo and Lionel Messi, and how they use their motor skills in attacking actions that result in a goal. We used and improved the easy-to-use observation instrument (OSMOS-soccer player) with 9 criteria, each one expanded to build 50 categories. Associations between these categories were investigated by T-pattern detection and Polar Coordinate analysis. T-pattern analysis detects temporal structures of complex behavioral sequences composed of simpler or directly distinguishable events within specified observation periods (time point series). Polar Coordinate analysis involves the application of a complex procedure to provide a vector map of interrelated behaviors obtained from prospective and retrospective sequential analysis. The T-patterns showed that for both players the combined criteria were mainly between the different aspects of motor skills, namely the use of lower limbs, contact with the ball using the outside of the foot, locomotion, body orientation with respect to the opponent goal line, and the criteria of technical actions and the right midfield. Polar Coordinate analysis detected significant associations between the same criteria included in the T-patterns as well as the criteria of turning the body, numerical equality with no pressure, and relative numerical superiority.
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an example of the informative potential of Polar Coordinate analysis sprint tactics in elite 1 500 m track events
Measurement in Physical Education and Exercise Science, 2017Co-Authors: Sonia Aragon, Teresa M Anguera, Daniel Lapresa, Javier Arana, Belen GarzonAbstract:ABSTRACTPolar Coordinate analysis is a powerful data reduction technique based on the Zsum statistic, which is calculated from adjusted residuals obtained by lag sequential analysis. Its use has been greatly simplified since the addition of a module in the free software program HOISAN for performing the necessary computations and producing easy-to-interpret results in the form of Polar Coordinate maps. In this study, we provide a simple and practical example of how this technique can be used to analyze tactical behaviors in sport and physical exercise. We studied 158 performances by 82 male runners in thirteen 1,500-m finals held at the Olympic Games, the World Championships in Athletics, and the European Athletics Championships between 2000 and 2012 to investigate associations between the initiation of sprints by race winners and other runners (focal behaviors) and the lap and zone of the track in which the sprints were initiated (conditional behaviors). The significant prospective/retrospective activati...
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goal scoring in soccer a Polar Coordinate analysis of motor skills used by lionel messi
Frontiers in Psychology, 2016Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Albert Canton, Raul HilenoAbstract:Soccer research has traditionally focused on technical and tactical aspects of team play, but few studies have analyzed motor skills in individual actions, such as goal scoring. The objective of this study was to investigate how Lionel Messi, one of the world's top soccer players, uses his motor skills and laterality in individual attacking actions resulting in a goal. We analyzed 103 goals scored by Messi between over a decade in three competitions: La Liga (n = 74), Copa del Rey (n = 8), and the UEFA Champions League (n = 21). We used an ad-hoc observation instrument (OSMOS-soccer player) comprising 10 criteria and 50 categories; Polar Coordinate analysis, a powerful data reduction technique, revealed significant associations for body part and orientation, foot contact zone, turn direction, and locomotion. No significant associations were observed for pitch area or interaction with opponents. Our analysis confirms significant associations between different aspects of motor skill use by Messi immediately before scoring, namely use of lower limbs, foot contact zones, turn direction, use of wings, and orientation of body to move toward the goal. Studies of motor skills in soccer could shed light on the qualities that make certain players unique.
Guangcai Zhang - One of the best experts on this subject based on the ideXlab platform.
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Polar Coordinate lattice boltzmann kinetic modeling of detonation phenomena
Communications in Theoretical Physics, 2014Co-Authors: Guangcai Zhang, Aiguo Xu, Yingjun LiAbstract:A novel Polar Coordinate lattice Boltzmann kinetic model for detonation phenomena is presented and applied to investigate typical implosion and explosion processes. In this model, the change of discrete distribution function due to local chemical reaction is dynamically coupled into the modified lattice Boltzmann equation which could recover the Navier Stokes equations, including contribution of chemical reaction, via the Chapman-Enskog expansion. For the numerical investigations, the main focuses are the none quilibrium behaviors in these processes. The system at the disc center is always in its thermodynamic equilibrium in the highly symmetric case. The internal kinetic energies in different degrees of freedom around the detonation front do not coincide. The dependence of the reaction rate on the pressure, influences of the shock strength and reaction rate on the departure amplitude of the system from its local thermodynamic equilibrium are probed.
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Polar Coordinate lattice boltzmann modeling of compressible flows
Physical Review E, 2014Co-Authors: Chuandong Lin, Guangcai Zhang, Sauro SucciAbstract:We present a Polar Coordinate lattice Boltzmann kinetic model for compressible flows. A method to recover the continuum distribution function from the discrete distribution function is indicated. Within the model, a hybrid scheme being similar to, but different from, the operator splitting is proposed. The temporal evolution is calculated analytically, and the convection term is solved via a modified Warming-Beam (MWB) scheme. Within the MWB scheme a suitable switch function is introduced. The current model works not only for subsonic flows but also for supersonic flows. It is validated and verified via the following well-known benchmark tests: (i) the rotational flow, (ii) the stable shock tube problem, (iii) the Richtmyer-Meshkov (RM) instability, and (iv) the Kelvin-Helmholtz instability. As an original application, we studied the nonequilibrium characteristics of the system around three kinds of interfaces, the shock wave, the rarefaction wave, and the material interface, for two specific cases. In one of the two cases, the material interface is initially perturbed, and consequently the RM instability occurs. It is found that the macroscopic effects due to deviating from thermodynamic equilibrium around the material interface differ significantly from those around the mechanical interfaces. The initial perturbation at the material interface enhances the coupling of molecular motions in different degrees of freedom. The amplitude of deviation from thermodynamic equilibrium around the shock wave is much higher than those around the rarefaction wave and material interface. By comparing each component of the high-order moments and its value in equilibrium, we can draw qualitatively the main behavior of the actual distribution function. These results deepen our understanding of the mechanical and material interfaces from a more fundamental level, which is indicative for constructing macroscopic models and other kinds of kinetic models.
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Polar Coordinate lattice boltzmann modeling of detonation phenomena
arXiv: Soft Condensed Matter, 2013Co-Authors: Aiguo Xu, Guangcai Zhang, Yingjun LiAbstract:We present a Polar Coordinate lattice Boltzmann model for the detonation phenomena. In this model the fluid behavior is describe by a finite-difference lattice Boltzmann(FDLB) model in Polar Coordinates, and the chemical reaction is described by Cochran's rate function. The released chemical energy is naturally coupled with the flow behavior. We introduce an operator-splitting scheme to both the FDLB equation and Cochran's rate function. The temporal evolutions are calculated analytically and the convection terms are solved via the first-order upwind scheme. The model is validated and verified via comparing simulation results with analytical solution of steady detonation. We simulate the detonation phenomena in two cases: implosion and explosion. Finally, we study some non-equilibrium characteristics in the steady detonation procedure. Numerical results show that, the amplitudes of deviations from thermodynamic equilibrium in front of von-Neumann peak are much higher than those behind the peak. At the von Neumann peak, the system is nearly in its thermodynamic equilibrium. By comparing each component of the high-order moments and its value in equilibrium, we draw qualitative information on the actual distribution functions at the two sides of von-Neumann peak. Such observations are helpful for the physical modeling of detonation phenomena from the macroscopic level.
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Polar Coordinate lattice boltzmann kinetic modeling of detonation phenomena
arXiv: Soft Condensed Matter, 2013Co-Authors: Chuandong Lin, Guangcai ZhangAbstract:A novel Polar Coordinate lattice Boltzmann kinetic model for detonation phenomena is presented and applied to investigate typical implosion and explosion processes. In this model, the change of discrete distribution function due to local chemical reaction is dynamically coupled into in the modified lattice Boltzmann equation, which could recovery the Navier-Stokes equations, including contribution of chemical reaction, via the Chapman-Enskog expansion. For the numerical investigations, the main focuses are the nonequilibrium behaviors in these processes. The system at the disc center is always in its thermodynamic equilibrium. The internal kinetic energies in different degrees freedoms around the detonation front do not coincide due to the fluid viscosity. They show the maximum difference at the inflexion point where the pressure has the largest spatial derivative. The dependence of the reaction rate on the pressure, influences of the shock strength and reaction rate on the departure amplitude of the system from its local thermodynamic equilibrium are probed.
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Polar Coordinate lattice boltzmann studying of shocking process investigation of non equilibrium effects in complex system
2013Co-Authors: Chuandong Lin, Guangcai ZhangAbstract:The Polar Coordinate Lattice Boltzmann (PCLB) model is used to investigate the shocking processes. The discrete velocity model used in this PCLB is the D2V97 presented by Watari and Tsutahara. The convective term is treated with a modified Warming-Beam scheme. Two shocking processes are investigated. In one case, the evolution of a shock wave travels inwards within an annular area is studied. In the other case, the evolution of a shock wave travels inwards within a circular area is studied. The non-equilibrium effects around the shock fronts are investigated by ana- lyzing the simulated results of velocity moments of local discrete distribution function. To further understand the inter- face from a more fundamental level, we give the sketch of the actual distribution function in velocity space around the shock front.
Marta Castaner - One of the best experts on this subject based on the ideXlab platform.
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mastery in goal scoring t pattern detection and Polar Coordinate analysis of motor skills used by lionel messi and cristiano ronaldo
Frontiers in Psychology, 2017Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Tiago Fernandes, Raul HilenoAbstract:Research in soccer has traditionally given more weight to players' technical and tactical skills, but few studies have analyzed the motor skills that underpin specific motor actions. The objective of this study was to investigate the style of play of the world's top soccer players, Cristiano Ronaldo and Lionel Messi, and how they use their motor skills in attacking actions that result in a goal. We used and improved the easy-to-use observation instrument (OSMOS-soccer player) with 9 criteria, each one expanded to build 50 categories. Associations between these categories were investigated by T-pattern detection and Polar Coordinate analysis. T-pattern analysis detects temporal structures of complex behavioral sequences composed of simpler or directly distinguishable events within specified observation periods (time point series). Polar Coordinate analysis involves the application of a complex procedure to provide a vector map of interrelated behaviors obtained from prospective and retrospective sequential analysis. The T-patterns showed that for both players the combined criteria were mainly between the different aspects of motor skills, namely the use of lower limbs, contact with the ball using the outside of the foot, locomotion, body orientation with respect to the opponent goal line, and the criteria of technical actions and the right midfield. Polar Coordinate analysis detected significant associations between the same criteria included in the T-patterns as well as the criteria of turning the body, numerical equality with no pressure, and relative numerical superiority.
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goal scoring in soccer a Polar Coordinate analysis of motor skills used by lionel messi
Frontiers in Psychology, 2016Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Albert Canton, Raul HilenoAbstract:Soccer research has traditionally focused on technical and tactical aspects of team play, but few studies have analyzed motor skills in individual actions, such as goal scoring. The objective of this study was to investigate how Lionel Messi, one of the world's top soccer players, uses his motor skills and laterality in individual attacking actions resulting in a goal. We analyzed 103 goals scored by Messi between over a decade in three competitions: La Liga (n = 74), Copa del Rey (n = 8), and the UEFA Champions League (n = 21). We used an ad-hoc observation instrument (OSMOS-soccer player) comprising 10 criteria and 50 categories; Polar Coordinate analysis, a powerful data reduction technique, revealed significant associations for body part and orientation, foot contact zone, turn direction, and locomotion. No significant associations were observed for pitch area or interaction with opponents. Our analysis confirms significant associations between different aspects of motor skill use by Messi immediately before scoring, namely use of lower limbs, foot contact zones, turn direction, use of wings, and orientation of body to move toward the goal. Studies of motor skills in soccer could shed light on the qualities that make certain players unique.
Oleguer Camerino - One of the best experts on this subject based on the ideXlab platform.
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mastery in goal scoring t pattern detection and Polar Coordinate analysis of motor skills used by lionel messi and cristiano ronaldo
Frontiers in Psychology, 2017Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Tiago Fernandes, Raul HilenoAbstract:Research in soccer has traditionally given more weight to players' technical and tactical skills, but few studies have analyzed the motor skills that underpin specific motor actions. The objective of this study was to investigate the style of play of the world's top soccer players, Cristiano Ronaldo and Lionel Messi, and how they use their motor skills in attacking actions that result in a goal. We used and improved the easy-to-use observation instrument (OSMOS-soccer player) with 9 criteria, each one expanded to build 50 categories. Associations between these categories were investigated by T-pattern detection and Polar Coordinate analysis. T-pattern analysis detects temporal structures of complex behavioral sequences composed of simpler or directly distinguishable events within specified observation periods (time point series). Polar Coordinate analysis involves the application of a complex procedure to provide a vector map of interrelated behaviors obtained from prospective and retrospective sequential analysis. The T-patterns showed that for both players the combined criteria were mainly between the different aspects of motor skills, namely the use of lower limbs, contact with the ball using the outside of the foot, locomotion, body orientation with respect to the opponent goal line, and the criteria of technical actions and the right midfield. Polar Coordinate analysis detected significant associations between the same criteria included in the T-patterns as well as the criteria of turning the body, numerical equality with no pressure, and relative numerical superiority.
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goal scoring in soccer a Polar Coordinate analysis of motor skills used by lionel messi
Frontiers in Psychology, 2016Co-Authors: Marta Castaner, Daniel Barreira, Oleguer Camerino, Teresa M Anguera, Albert Canton, Raul HilenoAbstract:Soccer research has traditionally focused on technical and tactical aspects of team play, but few studies have analyzed motor skills in individual actions, such as goal scoring. The objective of this study was to investigate how Lionel Messi, one of the world's top soccer players, uses his motor skills and laterality in individual attacking actions resulting in a goal. We analyzed 103 goals scored by Messi between over a decade in three competitions: La Liga (n = 74), Copa del Rey (n = 8), and the UEFA Champions League (n = 21). We used an ad-hoc observation instrument (OSMOS-soccer player) comprising 10 criteria and 50 categories; Polar Coordinate analysis, a powerful data reduction technique, revealed significant associations for body part and orientation, foot contact zone, turn direction, and locomotion. No significant associations were observed for pitch area or interaction with opponents. Our analysis confirms significant associations between different aspects of motor skill use by Messi immediately before scoring, namely use of lower limbs, foot contact zones, turn direction, use of wings, and orientation of body to move toward the goal. Studies of motor skills in soccer could shed light on the qualities that make certain players unique.
