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  • 1
    Online Resource
    Online Resource
    Wiley ; 2008
    In:  Studies in Applied Mathematics Vol. 121, No. 3 ( 2008-10), p. 245-261
    In: Studies in Applied Mathematics, Wiley, Vol. 121, No. 3 ( 2008-10), p. 245-261
    Abstract: Following the calculations on the individual and collective behaviors of players and the ball in Part I, further calculations are carried out in Part II concerning (i) the specific kinetic energy of each player, (ii) the power densities of various quantities for different groups of players (forwards, defenders) and for the geometrical centers of the two teams, as well as for the ball, and (iii) the correlations of various quantities among different groups of players and the ball, as well as among the geometrical centers and the ball. Some parameters are compared between the two teams. The relation between these parameters and the potential indicators and all the influencing factors to the final result of a soccer match are discussed. Advantages and limitations of the present approach and some ideas for the future research are outlined.
    Type of Medium: Online Resource
    ISSN: 0022-2526 , 1467-9590
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2008
    detail.hit.zdb_id: 1492266-6
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  • 2
    Online Resource
    Online Resource
    Elsevier BV ; 1999
    In:  Journal of Science and Medicine in Sport Vol. 2, No. 3 ( 1999-10), p. 211-226
    In: Journal of Science and Medicine in Sport, Elsevier BV, Vol. 2, No. 3 ( 1999-10), p. 211-226
    Type of Medium: Online Resource
    ISSN: 1440-2440
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1999
    detail.hit.zdb_id: 2230157-4
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  • 3
    Online Resource
    Online Resource
    Ovid Technologies (Wolters Kluwer Health) ; 2002
    In:  Medicine & Science in Sports & Exercise Vol. 34, No. 5 ( 2002-05), p. 134-
    In: Medicine & Science in Sports & Exercise, Ovid Technologies (Wolters Kluwer Health), Vol. 34, No. 5 ( 2002-05), p. 134-
    Type of Medium: Online Resource
    ISSN: 0195-9131
    RVK:
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2002
    detail.hit.zdb_id: 2031167-9
    SSG: 31
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  • 4
    Online Resource
    Online Resource
    Wiley ; 2008
    In:  Studies in Applied Mathematics Vol. 121, No. 3 ( 2008-10), p. 223-243
    In: Studies in Applied Mathematics, Wiley, Vol. 121, No. 3 ( 2008-10), p. 223-243
    Abstract: Detailed time series analysis of a soccer match is given based on the detailed data of the 2D motions of all 22 players and of the ball for the match. The whole analysis includes two parts. In Part I, the individual and collective behaviors of the players of the two teams as well as the motion of the ball are presented as various time series. Geometrical centers, radii, expansion speeds, possession functions of the two teams are defined and calculated as functions of time. Major ranges of all players as well as of different groups of players (defenders, midfielders, forwards) of the two teams during the entire first half, the attacking phase of team A and the attacking phase of team B are calculated, respectively, showing the structures of the two teams during different phases. Distance coverage of each player and the mean distances covered by different groups of players (defenders, midfielders, forwards) during different phases are calculated. The time portions of possession of the ball by each team and the time portions of different phases are also calculated. In Part II, energy and spectral analysis and various correlations will be derived. The relation between various parameters and potential indicators will be discussed. The major purpose of the present study is to offer some general mathematical tools for the detailed analysis and to reveal some general features of soccer match when the detailed 2D data are available. The results would offer the raw materials for various potential indicators which may eventually be used in the coaching process to enhance the performance and in the prediction of the results of soccer matches.
    Type of Medium: Online Resource
    ISSN: 0022-2526 , 1467-9590
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2008
    detail.hit.zdb_id: 1492266-6
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  • 5
    In: Frontiers in Psychology, Frontiers Media SA, Vol. 12 ( 2021-3-17)
    Abstract: The performance and the success of a group working as a team on a common goal depends on the individuals’ skills and the collective coordination of their abilities. On a perceptual level, individual gaze behavior is reasonably well investigated. However, the coordination of visual skills in a team has been investigated only in laboratory studies and the practical examination and knowledge transfer to field studies or the applicability in real-life situations have so far been neglected. This is mainly due to the fact that a methodological approach along with a suitable evaluation procedure to analyze the gaze coordination within a team in highly dynamic events outside the lab, is still missing. Thus, this study was conducted to develop a tool to investigate the coordinated gaze behavior within a team of three human beings acting with a common goal in a dynamic real-world scenario. This team was a (three-person) basketball referee team adjudicating a game. Using mobile eye-tracking devices and an indigenously designed software tool for the simultaneous analysis of the gaze data of three participants, allowed, for the first time, the simultaneous investigation of the coordinated gaze behavior of three people in a highly dynamic setting. Overall, the study provides a new and innovative method to investigate the coordinated gaze behavior of a three-person team in specific tasks. This method is also applicable to investigate research questions about teams in dynamic real-world scenarios and get a deeper look at interactions and behavior patterns of human beings in group settings (for example, in team sports).
    Type of Medium: Online Resource
    ISSN: 1664-1078
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2563826-9
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  • 6
    In: Applied Sciences, MDPI AG, Vol. 11, No. 14 ( 2021-07-20), p. 6648-
    Abstract: This study looks at the visual scan patterns of high-class basketball referees. Using mobile eye-tracking devices, referees’ gaze behavior was analyzed during the execution of three-point shots in the official pre-season games of Germany’s men’s professional basketball league. We evaluated the extent to which the referees fulfill the tasks assigned to them, where do they look, and to what extent does their gaze behavior overlap during a three-point shot. Results indicate that referees who are far away from the ball and are, therefore, not responsible for observing the actual shot, tend to comply with their areas of responsibility less often than referees standing nearer to the ball, i.e., they appear to observe the ball more than required (ball watching) at the expense of other areas that they are required to be observing at the beginning of the shooting process. However, referees spend a very small part of a three-point shot looking at the same areas of interest. This indicates that referee teams’ allocation of gaze is rather effective, remaining in line with FIBA recommendations and is presumably not the main cause for errors in officiating.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2704225-X
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  • 7
    In: Applied Sciences, MDPI AG, Vol. 13, No. 2 ( 2023-01-14), p. 1139-
    Abstract: (1) Background: Computer-based analyses have been widely used to study aspects of various team and racket sports. However, such analyses have so far eluded table tennis, except in special competition forms, under fixed laboratory conditions or have only tracked the ball. The aim was to detect a basic, global, positional behavior, independent of the score. (2) Methods: We investigated the player position of professional male table tennis players with respect to handedness (right/left), playing system (offensive/defensive) and racket holding (shakehand/penholder) to determine the applicability of automated analysis systems. We used existing video data of competitive matches (N = 198 sets; 2006–2020) and transliterated them into an x–y coordinate system. From this, we were able to conduct a heatmap analysis for different types of players. (3) Results: The comparison between right- and left-handed players resulted in a significant difference in the positioning of the x coordinate (D = 0.5663; p = 0.001). Both groups positioned themselves on average in their own backhanded half of the table (Re: x = −0.22 m, Li: x = 0.39 m). (4) Conclusions: Our results have yielded valuable insights into the importance of analyzing positional behavior in a differentiated manner depending on handedness, playing strategy and racket holding posture.
    Type of Medium: Online Resource
    ISSN: 2076-3417
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2704225-X
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