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341.
Pedro Silva Ricardo Duarte Jaime Sampaio Paulo Aguiar Keith Davids Duarte Araújo 《Journal of sports sciences》2014,32(20):1888-1896
AbstractThis study analysed the influence of field dimension and players’ skill level on collective tactical behaviours during small-sided and conditioned games (SSCGs). Positioning and displacement data were collected using global positioning systems (15 Hz) during SSCGs (Gk+4 v. 4+Gk) played by two groups of participants (NLP- national-level and RLP-regional-level players) on different field dimensions (small: 36.8 × 23.8 m; intermediate: 47.3 × 30.6 and large: 57.8 × 37.4 m). Team tactical performance was assessed through established dynamic team variables (effective playing space, playing length per width ratio and team separateness) and nonlinear signal processing techniques (sample entropy of distances to nearest opponents and the teams’ centroids’ mutual information). Results showed that the effective playing space and team separateness increased significantly with pitch size regardless of participant skill level (P < 0.001, η2 = 0.78 and P < 0.001, η2 = 0.65, respectively). Playing length per width ratio increased with pitch size for the NLP but was maintained at a relatively constant level by RLP across treatments indicating different playing shapes. There was significantly more irregularity in distances to nearest opponents for the NLP in small (P = 0.003) and intermediate fields (P = 0.01). Findings suggest that tactical behaviours in SSCGs are constrained by field size and skill level, which need to be considered by coaches when designing training practices. 相似文献
342.
Ana Paula da Silva 《Soccer & Society》2014,15(1):36-47
The aim of this essay is to map out the racial discourses of the 1950s, particularly those pertinent to the 1958 Soccer World Cup, in order to better understand the main ideas about race, which were in vogue at the time when Edson Arantes do Nascimento (Pelé) became (inter)nationally famous as a great sports star. The essay argues that Pelé’s statements regarding race and race relations in Brazil were inherently based on the discourses prevalent among academics and Brazil’s black activists during the 1950s. Pelé’s professional asceticism and his belief in individualism, cultivated during his youth in the city of Bauru, were further reinforced by the racial discourses of the 1950s. These views led him to believe that any discrimination he might encounter due to his colour and class could be overcome with a disciplined and professional attitude. Today, this sort of ascetic view of the world has been accused by certain segments of Brazil’s black movements as being insufficient to overcome the supposedly irresolvable inequalities that exist between Brazil’s black and white populations. Pelé, however, has not changed his position regarding anti-black discrimination, choosing to continue to emphasize professionalism and discipline as the two most formidable tools in the fight against racial discrimination and inequality. 相似文献
343.
da Silva Renan Amorim de Vasconcelos Flávia Cristina Gomes Catunda 《Education and Information Technologies》2022,27(5):6967-6987
Education and Information Technologies - This paper presents an analysis of cognitive skill levels expressed in high school students’ performance using laboratory simulations. We address... 相似文献
344.
José Daniel López-Barrientos Eliud Silva Enrique Lemus-Rodríguez 《Teaching Statistics》2023,45(1):36-44
We take advantage of a combinatorial misconception and the famous paradox of the Chevalier de Méré to present the multiplication rule for independent events; the principle of inclusion and exclusion in the presence of disjoint events; the median of a discrete-type random variable, and a confidence interval for a large sample. Moreover, we pay tribute to our original bibliographic sources by providing two computational tools to facilitate the students' insights on these topics. 相似文献