排序方式： 共有18条查询结果，搜索用时 31 毫秒
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Rebecca A. Battista Erin D Bouldin Karin A. Pfeiffer Christine E. Pacewicz Shannon R Siegel Eric M. Martin 《Measurement in physical education and exercise science》2021,25(1):43-52
ABSTRACT Participation in youth sport is positively associated with physical fitness and performance. The purpose of the current study was to examine if physical fitness measures during childhood and early adolescence predicted high school sport participation. Participants included youth in the Michigan State University Motor Performance Study. Measures consisted of the endurance shuttle run, Wells sit-and-reach, jump and reach, standing long jump, agility shuttle run and 30-yard dash. Individual, generalized estimating equation models were used to estimate the association between each measure and the odds of participating in high school sport. For both sexes, the endurance shuttle run and agility shuttle run were related to sport participation. For boys only, the long jump and 30-yard dash were also associated with sport participation. Better physical fitness and performance across several dimensions in childhood, including those related to motor skills, enhanced the likelihood of sport participation in high school. 相似文献
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武当山近50年考古新发现(续) 总被引：2，自引：0，他引：2
近50年的考古调查发掘表明,武当山不仅是我国著名的风景和道教圣地,而且也是我国罕见的一个历史悠久、蕴藏丰富的"文博之乡".从史前的动植物化石、新石器时代的遗址,到有史以来的历代古迹、墓葬和遗存,几乎可以勾画出自生命的起源、人类的诞生以及进入文明时代的一个清晰线索和图景. 相似文献
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Sean P. Cumming Rebecca A. Battista Martyn Standage Martha E. Ewing Robert M. Malina 《Journal of sports sciences》2013,31(10):1039-1046
Abstract In this study, we examined the relations between biological maturity status, body mass index, age, and perceptions of adult autonomy support in the context of youth soccer. A total of 70 female and 43 male soccer players, aged 9 – 15 years, completed three adult-specific versions (i.e. mother, father, coach) of the perceived autonomy support subscale from the Interpersonal Style Scale. The participants' percent predicted adult stature was used as an estimate of biological maturity status. Multiple linear regression analyses revealed that advanced maturity status in male players predicted lower perceptions of autonomy support from the coach. Maturity status was unrelated to perceptions of autonomy support from the coach in female soccer players, and paternal and maternal autonomy support in male and female players. Age and body mass index were unrelated to perceptions of adult (i.e. coach, mother, father) autonomy support in male and female players. 相似文献
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This research aims to study the ontologization process of the Romani minority in Abruzzo region (Italy), characterized by the longstanding presence of a group of sedentary Romani, and to test the cross-categorization approach using a specific dependent measure such as the ontologization of the Italian Romani target. A questionnaire was administered to 475 Italian participants, in which the respondents were asked to attribute 6 human positive, 6 human negative, 6 animal positive and 6 animal negative associates to three targets: Italians (ingroup), Italian Romani (ingroup–outgroup) and Romani (outgroup). Participants showed evidence that they used human/animal associates differently for the ingroup and for the outgroup members. Romani groups were ascribed more animal than human characteristics, while Italians were described as more human than the Romani and Italian Romani group, showing the ontologization process of the Romani minority and the superhumanization of the Italian ingroup. Moreover, the cross-categorized Italian Romani target was the most discriminated against in that it was attributed more animal negative associates than the Romani and Italian ones. Since modern racism could take the form of the denial of the humanness and the attribution of animality to outgroup members, our data emphasize the importance of taking account of the persistence of negative attitudes so deep-rooted as those felt towards the Romani. 相似文献
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校本课程开发本身赋予教师一定的职能,并对教师的专业化发展提出了素质要求。教师要真正成为职业教育校本课程开发的主体,就应该注重自身的专业化发展,利用自身深厚的专业知识与技能和高尚的职业道德品质与人文素质,积极推进课程的校本化。 相似文献
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In human movement and sports science, manipulations of perception and action are common and often comprise the control of events, such as opening or closing liquid crystal goggles. Most of these events are externally controlled, independent of the actions of the participants. Less common, although sometimes desirable, are event manipulations that are dependent on the unconstrained movements of participants. As an example, we describe a method we used previously to manipulate vision of basketball jump shooters on the basis of on-line registration of their own movements. The shooters wore liquid crystal goggles that opened or shut as a function of specific kinematic features of these movements. The novel aspect of this method is that the criteria for detecting movement patterns and performing the appropriate manipulations are adjustable to the specific sport context and the complexity and variations of the unconstrained movements. The method was implemented as a finite state machine: a computer system that can be used for pattern recognition. We discuss this method, how it works and the potential it has for studying perceptual-motor skills in sport. Furthermore, the results of the basketball experiment are briefly summarized and complemented with new analyses. 相似文献
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Enrico Quagliarini Federica Bondioli Giovanni Battista Goffredo Antonio Licciulli Placido Munafò 《Journal of Cultural Heritage》2013,14(1):1-7
Titanium dioxide (TiO2) can be used to realize transparent self-cleaning coatings on stone surfaces as an active and preventive protection system, limiting cleaning and maintenance actions, reducing their costs in Architectural Heritage. This self-cleaning ability is due to photo-induced hydrophilicity on treated surfaces. The aim of this investigation is to analyze this effect, since it could bring to a greater water absorption, a potential source of damage for stone surfaces. Titania sol, obtained by sol-gel and hydrothermal processes, was deposited on travertine by spray coating, in two different ways. Water absorption by capillarity, static contact angle and a specific surface water absorption analysis were assessed before and after the TiO2 treatments. The effects of deposited amount of titania on the characteristics of treated surfaces were evaluated. It was shown that there were no evident changes in the substrate reactivity without ultraviolet (UV) light exposure, while it seems that hydrophilicity due to UV light does not lead to higher water absorption, thus encouraging the use of TiO2 coatings in the field of Architectural Heritage. However, before widely applying this conservative treatment, some further researches are recommended in order to better assess its durability and sustainability. 相似文献
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技术创新网络的扩张与核心企业的成长相互促进,相互决定,形成了复杂的共生演化关系。以知识为基础的企业,必须在各个层次上构建网络,维护多层交互作用,加强与其他企业的合作。从企业间关系耦合的视角,分析了技术创新网络中核心企业的形成过程,提出技术创新网络中各结点企业间的技术合作是一种相互间的知识协同。研究发现,企业间技术交流的过程就是企业间知识匹配——知识流动——知识控制的过程,而技术创新网络中的企业结点也是通过这三种状态,使自身能力得到提升,进而影响到与其他结点的知识协同,并最终成长为核心企业。 相似文献