scholarly journals The Adaptive Behavior of a Soccer Team: An Entropy-Based Analysis

Entropy ◽  
2018 ◽  
Vol 20 (10) ◽  
pp. 758 ◽  
Author(s):  
Yair Neuman ◽  
Navot Israeli ◽  
Dan Vilenchik ◽  
Yochai Cohen

To optimize its performance, a competitive team, such as a soccer team, must maintain a delicate balance between organization and disorganization. On the one hand, the team should maintain organized patterns of behavior to maximize the cooperation between its members. On the other hand, the team’s behavior should be disordered enough to mislead its opponent and to maintain enough degrees of freedom. In this paper, we have analyzed this dynamic in the context of soccer games and examined whether it is correlated with the team’s performance. We measured the organization associated with the behavior of a soccer team through the Tsallis entropy of ball passes between the players. Analyzing data taken from the English Premier League (2015/2016), we show that the team’s position at the end of the season is correlated with the team’s entropy as measured with a super-additive entropy index. Moreover, the entropy score of a team significantly contributes to the prediction of the team’s position at the end of the season beyond the prediction gained by the team’s position at the end of the previous season.

Author(s):  
Marco Carricato ◽  
Joseph Duffy ◽  
Vincenzo Parenti-Castelli

Abstract In this article the inverse static analysis of a two degrees of freedom planar mechanism equipped with spiral springs is presented. Such analysis aims to detect the entire set of equilibrium configurations of the mechanism once the external load is assigned. While on the one hand the presence of flexural pivots represents a novelty, on the other it extremely complicates the problem, since it brings the two state variables in the solving equations to appear as arguments of both trigonometric and linear functions. The proposed procedure eliminates one variable and leads to write two equations in one unknown only. The union of the root sets of such equations constitutes the global set of solutions of the problem. Particular attention has been reserved to the analysis of the “reliability” of the final equations: it has been sought the existence of critical situations, in which the solving equations hide solutions or yield false ones. A numerical example is provided. Also, in Appendix it is shown a particular design of the mechanism that offers computational advantages.


2020 ◽  
Vol 12 (15) ◽  
pp. 5908
Author(s):  
Félix Calle ◽  
Ángela González-Moreno ◽  
Inmaculada Carrasco ◽  
Manuel Vargas-Vargas

Concerned about climate change, cooperatives in the wine sector are beginning to adapt their strategies, guided by cooperative principles that encompass high social responsibility and the pursuit of community values. In this context and focused on the analysis of the decisions that drive firms to be more environmentally sustainable, our goal is twofold. On the one hand, we wish to examine whether there exist differences between cooperative and non-cooperative firms as regards their environmental proactivity. On the other hand, we hope to demonstrate the diversity of behaviors within the category of cooperative firms, identifying the possible patterns of environmental proactivity in Spanish cooperatives in the wine sector. We first conducted a difference of means t-test for independent samples (n = 251; sampled in 2017)—cooperatives (51) vs. non cooperative firms (200)- and then a two-stage cluster analysis and a subsequent variance analysis, using SPSS 24. Our results show no significant differences between cooperative and non-cooperative firms concerning their environmental behavior and underlines the diversity within the cooperatives in the wine sector as regards their environmental proactivity, revealing the existence of proactive, preventive and activist patterns of behavior. These patterns also show differences in the motivations for their environmental behaviors and their assessment of financial performance.


2020 ◽  
Vol 17 (4) ◽  
pp. 91-101
Author(s):  
T.N. Soboleva ◽  

The article is devoted to the poorly studied problem of the formation of talent in the conditions of different degrees of freedom in activity and the impact on that formation of a person’s conservative and innovative semantic attitudes towards the introduction of new equipment. The main objective of the study is to describe how the conditions of different degrees of freedom in the activity are refracted with internal conditions, which are conservative and innovative semantic attitudes and various talent structures. The study was conducted on a sample of 54 qualified railway drivers using a specialized simulator which allows to simulate three degrees of freedom in the activity. The psychological analysis of the activity revealed seven abilities ensuring the implementation of the activity. Based on empirical data, the article shows that low, medium and high degrees of freedom in activity are manifested in different degrees of productivity. Conservative and innovative semantic attitudes to the introduction of new equipment do not have a significant effect on the productivity of the activity in the conditions of different degrees of freedom. Along with this, depending on the conservative and innovative semantic attitudes, different structures of talent in terms of composition and degree of integration under the conditions of different degrees of freedom in the activity are formed. On the one hand, conservative and innovative semantic attitudes act as internal determinants; on the other hand, low, medium and high degrees of freedom in the activity act as external determinants of the formation of various talent structures.


2021 ◽  
Vol 11 ◽  
Author(s):  
Chunhua Li ◽  
Yangqing Zhao

The objective of the study was to compare goal scoring patterns among the “Big Five” European football leagues during the 2009/2010–2018/2019 seasons. A total of 18 pattern dimensions related to the offense pattern, the shooting situation and the scoring time period were evaluated. Kruskal–Wallis analyses revealed significant pattern differences among the five leagues. The Spanish La Liga showed a greater proportion of goals from throw-ins. The English Premier League had a higher tendency to score from corner kicks. The German Bundesliga had the greatest number of goals from counterattacks and indirect free kicks, and the Italian Serie A had the greatest proportion of penalties. Ligue 1’s scoring ability is weaker than that of the other leagues, especially Bundesliga. The Bundesliga had an overwhelming advantage in goals scored on big chances with assists, while the Premier League had an advantage in goals scored with assists that were not from big chances. However, the differences among the five leagues in the mean goals scored in the last 15 min and the goals from elaborate attacks and direct free kicks were not statistically significant. These results provide a valuable addition to the knowledge of different goal patterns of each league and allow us to better understand the differences among the leagues.


Author(s):  
M. Kümmerle ◽  
B. Aeschlimann ◽  
J. Zoethout ◽  
T. Belfroid ◽  
R. Vuillemin ◽  
...  

Abstract This paper presents the design and the implementation of a contact free Active Magnetic Bearing (AMB) for high precision rotation applications. For controlling five Degrees of Freedom (DOF) of the rotor six coupled reluctance force actuators (creating radial and axial forces at the same time) are used. A method for designing the actuators in order to meet the specifications is described. Two different controller schemes using different sensor configurations have been implemented on a functional prototype: On the one hand a conventional decentralized PID controller, on the other hand a more centralized structure.


2020 ◽  
Vol 16 (3) ◽  
pp. 211-220
Author(s):  
Leszek Szczecinski ◽  
Aymen Djebbi

AbstractThis work is concerned with the interpretation of the results produced by the well known Elo algorithm applied in various sport ratings. The interpretation consists in defining the probabilities of the game outcomes conditioned on the ratings of the players and should be based on the probabilistic rating-outcome model. Such a model is known in the binary games (win/loss), allowing us to interpret the rating results in terms of the win/loss probability. On the other hand, the model for the ternary outcomes (win/loss/draw) has not been yet shown even if the Elo algorithm has been used in ternary games from the very moment it was devised. Using the draw model proposed by Davidson in 1970, we derive a new Elo-Davidson algorithm, and show that the Elo algorithm is its particular instance. The parameters of the Elo-Davidson are then related to the frequency of draws which indicates that the Elo algorithm silently assumes games with 50% of draws. To remove this assumption, often unrealistic, the Elo-Davidson algorithm should be used as it improves the fit to the data. The behaviour of the algorithms is illustrated using the results from English Premier League.


Author(s):  
Iryna Savenkova ◽  
Yulia Missuk

The problem of the relationships of mechanisms of psychological protection with the process of adaptation of students is considered to the educational environment in the university in this article. It is justified the feasibility of the study student period, that places higher demands to the psychological protection of the individual. The description of the theoretical justification of the problem of psychological protection and its features is given on the analysis of the scientific literature. It is presented the picture of the strategies of adaptive behavior of the person. The psychodiagnostic techniques are described such as ( test "Lifestyle Index" К. R. Plutchik – G. Kelermag, the methodology "The indicator of strategies to overcome stress" of D. R. Amirkhan in the adaptation of N.O. Syroty and V.M. Yalta, the multifactor personal questionnaire "The adaptability" of A. G. Maklakova in the adaptation of S. V. Chermyanin, the test of semantic and real orientations of D. O. Leontiev, the methodology of determining the stylistic features of self-regulation of behavior by V. I. Morosanova and E. M. Konoz). All they are used in the research of the features of psychological protection of personality and transformational adaptation. It is given the data of empirical research of features of formation of strategies of adaptive behavior in the course of psychological protection of the personality of the student. The psychological protection and personality development are related with each other, allowing the individual to adapt to difficult living conditions. On the one hand, the psychological protection is a condition for the harmonious development of the student's personality. It allows to provide adaptation through realization of balance of dynamic process of development. On the other hand, the development of personality in adolescence period is one of the conditions of psychological protection, ensuring the process of transformation of the individual and its life. The constructive interaction with the surrounding world is not possible without it. On the one hand, the self-protective efforts of a person are aimed at adaptation to the environment (preservation), and on the other hand, to the transformation of the psychological situation (change).


2018 ◽  
Vol 13 (5) ◽  
pp. 665-667 ◽  
Author(s):  
Ryland Morgans ◽  
Rocco Di Michele ◽  
Barry Drust

Purpose: Competitive match play is a dominant component of the physical load completed by soccer players in a training microcycle. Characterizing the temporal disruption in homeostasis that follows exercise may provide some insight on the potential for match play to elicit an adaptive response. Methods: Countermovement-jump (CMJ) performance was characterized 3 d postmatch for 15 outfield players from an English Premier League soccer team (age 25.8 ± 4.1 y, stature 1.78 ± 0.08 m, body mass: 71.7 ± 9.1 kg) across a season. These players were classified as either starters (n = 9) or nonstarters (n = 6), according to their average individual playing time (more or less than 60 min/match). Linear mixed models were used to investigate the influence of indicators of match activity (total distance covered [TD] and high-intensity running distance [HI]) on CMJ height and peak power (PP). Results: Starting players covered much greater TD (ES = 1.5) and HI (ES = 1.4) than nonstarters. Furthermore, there was a possible positive effect of HI on CMJ height and PP. This relationship suggests that an additional 0.6 km of HI would increase CMJ height and PP by slightly more than the smallest-worthwhile-change values of 0.6 cm and 1.0 W/kg, respectively. This small yet practically relevant increase in performance may suggest that match play, more specifically the intense activities that are associated with the match, provides a physiological stimulus for neuromuscular adaptation. Conclusions: These data may have implications for the preparation of soccer squads, especially the training requirements of starting and nonstarting players.


1992 ◽  
Vol 07 (21) ◽  
pp. 1931-1943 ◽  
Author(s):  
I.A. BATALIN ◽  
S.L. LYAKHOVICH ◽  
I.V. TYUTIN

The new quantization scheme is proposed for theories with second class constraints. The formalism possesses the properties intermediate between those of the conversion method and quantum deformation of the Dirac bracket: on the one hand, all the phase variable operators have nonsingular commutators while the physical states are determined by weak equations; on the other hand, no extra degrees of freedom are introduced.


2017 ◽  
Vol 18 (2) ◽  
pp. 149-165 ◽  
Author(s):  
Petros Parganas ◽  
Christos Anagnostopoulos ◽  
Simon Chadwick

Purpose The purpose of this paper is to examine the effects of social media in brand associations, particularly in regard to soccer fan clubs. Design/methodology/approach The study used a professional English Premier League soccer team to investigate the effects that social media interaction had on brand associations of the team’s fan clubs in two national contexts – England and Greece. Findings In total, 207 online questionnaires from six fan clubs were collected and analyzed using descriptive and inferential (t-tests and χ2 tests) statistics. Originality/value The results revealed similarities on Facebook in terms of positive receptions of brand attributes and resonance of perceived brand benefits, while significant differences were observed on Twitter, particularly in terms of brand benefits.


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