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A landmark-based statistical method, morphological variation analysis, for the quantification of the repeatability in the arrangement of body segments during the execution of sport actions has recently been developed. A two-dimensional shape is produced and its morphology is studied. The method was used to measure the within-team variability of the relative positions of players during the execution of offensive schemes in soccer. Two junior soccer teams of different technical abilities (semi-professional vs. amateur), each playing two standardized offensive schemes of different difficulty (easier: throw-in; more difficult: wing attack) were filmed. Each scheme was repeated 25 (semi-professionals) or 10 (amateurs) times. For each repetition, the position of the players in a single significant frame was analysed using morphological variation analysis. The reproducibility of both schemes was higher among the semi-professionals than among the amateurs (two-way analysis of variance, P<0.005). The repeatability of the players' relative positions was related to the difficulty of the scheme and the technical level of the team. Among the amateurs, the throw-in was more reproducible than the wing attack (Student's t-test, P<0.005). The method not only allows the quantification of collective (team) coordination, but also the separation of the influence of individual players. 相似文献
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Alvise Sforza Tarabochia 《Culture, Theory & Critique》2017,58(1):33-47
This essay addresses the controversial status of subjectivity in Esposito’s affirmative biopolitics and articulates it using Recalcati’s psychoanalytical theory, with the aim of promoting a non-vitalistic affirmative biopolitics. In biopolitical theory in general, and in Esposito’s especially, subjectivity has a problematic status: while life precedes intersubjectivity, it is not clear whether subjectivity is regarded as a consequence or as the precondition of intersubjectivity (and thus of life). Esposito acknowledges such an aporia, the subjectum suppositum, but fails to recognise it in his own reasoning, ultimately envisioning a powerful interpretative and transformative paradigm – affirmative biopolitics – whilst leaving at its core a life-less subject. In this essay, I read Esposito’s affirmative biopolitics through Recalcati’s clinical approach to the ‘new symptoms’, with the aim of envisioning a subjectivity compatible with the ontogenetic primacy of life posited by biopolitical theory. Ultimately, the aim of this article is to suggest that an affirmative biopolitics, grounded on the promotion of neither a pre-subjective bare life, nor of a lifeless subject, but of a fully subjective life, a living subject is possible. 相似文献
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