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Weight transfer research in the golf swing has produced conflicting and inconclusive results. A limitation of previous studies is the assumption that only one swing "style" exists within the golf swing. If different styles, or movement strategies, exist and if the different styles are analysed together in a single group, statistical errors will result. The aim of this study was to determine if different weight transfer styles exist in the golf swing by applying cluster analysis to centre of pressure (CP) patterns in the direction of hit (CPy) and to evaluate cluster analysis issues. Sixty-two professional to high handicap golfers performed simulated drives, hitting a golf ball into a net, while standing on two force plates. Centre of pressure position relative to the feet (CPy%) was quantified at eight swing events identified from 200-Hz video. Cluster analysis identified two major CPy% styles: a "Front Foot" style and a "Reverse" style. Both styles began with CPy% positioned evenly between the feet, moved to the back foot during backswing, and then forward during early downswing. Beyond early downswing, the Front Foot group continued to move CPy% to the Front Foot through to ball contact, while the Reverse group moved CPy% towards the back foot through ball contact and follow-through. Both weight transfer styles were evident across skill levels from professional to high handicap golfers, indicating that neither style was a technical error. Cluster analysis should include hierarchical and non-hierarchical clustering and use objective measures combined with theoretical assessment to determine the optimal number of clusters. Furthermore, a number of validation procedures should always be used to validate the solution. 相似文献
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Abstract The Muslim community in Sri Lanka has a pre-Islamic origin. Ethnically they are a mixed group, but changing political fortunes throughout the course of Sri Lankan history have made them realize that their identity lies in holding fast to the religion of Islam and not to any ethnic category. The current Sinhala-Tamil ethnic war has once again reinforced the need to hold on to the religious identity even more tightly. However, recent economic and political changes in the country and changes taking place in the Muslim world have injected new concerns for the community to worry about. The community is well and truly trapped in a political quagmire. This article highlights some aspects of this predicament. 相似文献
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The purpose of this research was to examine how Norway's ideology of inclusion is realized in Norwegian schools and school systems, and what factors work to support or hinder its implementation. Using semi-structured interviews, we obtained data from our informants at multiple levels in the Norwegian educational system in one municipality. Our data analyses focused on identifying themes that were shared by multiple informants, as well as retaining important points or perspectives from individuals. Generally all of the informants were positive towards the ideology of inclusion. The biggest difficulty facing its implementation seemed to be that of social integration. This was much more of a concern than curricular integration. Probably because of such challenges, schools still placed students in separate settings. Factors that affected inclusion included: characteristics of teachers, classroom environment, school climate, cooperation, support from people with competence, attitudes and resources. 相似文献
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William Clayton Bower 《Religious education (Chicago, Ill.)》2013,108(6):646-649
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Matthew Clayton 《Journal of Philosophy of Education》2012,46(3):414-431
Notwithstanding an ongoing concern about the low representation of certain groups in higher education, there is reluctance on the part of politicians and policy makers to adopt positive discrimination as an appropriate means of widening participation. This article offers an account of the different objections to positive discrimination and, thereafter, clarifies and criticises the view that universities ought to select those applicants who are expected to be most successful as students. It distinguishes arguments from meritocracy, desert, respect, and productivity and shows how these arguments are compatible with the use of positive discrimination in higher education. 相似文献