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This paper serves as a resource guide for Sports Engineering educators. The paper covers key topics in Sports Engineering, including ball impact, friction, safety and materials. A variety of resource types are presented to reflect modern methods of learning and searching for information, including textbooks, research and review papers, websites and videos. The field could benefit from more resources specifically designated for teaching Sports Engineering, particularly textbooks. 相似文献
874.
The effect of increased development and professionalization in elite Association Football referee training and the relationship with reduced home advantage in the English professional leagues were examined. The central aim was to chart the evolution of referee training, and how these developments in referee training have assisted in reducing home advantage. Interviews were conducted with elite and ex-elite referees, as well as those involved in the management, training and administration of elite referees in order to identify more recent adaptations to elite referee training and further explain the relationship between training and the reduction in home advantage. Findings indicate training and support is pronounced within elite refereeing has developed appreciably over time, and has contributed significantly to an increase in performance, decision-making correctness and subsequent decline in home advantage. 相似文献
875.
The aim of this paper is the development of a general class of input shapers with distributed time delay which leads to retarded spectral properties. The design of the shaper is formulated as a multi-objective optimization problem, where response time and robustness, expressed in terms of residual vibrations, are the main objectives. As a part of the optimization formulation, common requirements for input shapers such as non-decreasing step response and unity steady state gain are considered in the design. Moreover, additional optional requirements, such as smoothness of a step response, jerk and even jounce limits can be added to optimization procedure. The resulting problem can be solved using convex optimization techniques. Several illustrative examples are presented in comparison with classical input shaping techniques. Finally, implementation aspects are discussed. The paper is accompanied by an implementation in MATLAB, including a user-friendly interface for the interactive shaper design. 相似文献
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Extending a recent study of the standards mothers apply in evaluating the quality of children's programs (Nikken et al., 1996), this study investigated the standards children between 9 and 12 years of age (N = 427) use to evaluate the quality of four types of children's programs: children's news programs, educational programs for children, dramatic programs for children, and cartoons. Data were collected by means of questionnaires. A factor analysis resulted in a list of nine types of quality standards. The two quality standards children considered most important were: (a) comprehensibility, and (b) aesthetic quality. Additional standards were: (c) entertainment, (d) involvement, (e) credibility, (f) innocuousness, (g) restfulness, (h) thought provocation, and (i) presence of role models. The importance children attached to the nine quality standards varied with both program type and child characteristics. Seven of the quality standards found in the present study are similar to the maternal quality standards observed in Nikken et al. ‘s study. The children in the present study generally viewed these seven quality standards as less important than the mothers in Nikken et al.’s study. However, the relative importance children and mothers attached to these quality standards showed similarity, especially in the case of cartoons, and to a lesser extent for children's news programs and dramatic programs. 相似文献
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