消费时代的审美趣味

消费已成了现代社会的主要特征之一。本文着重分析了以欲望为特征的消费社会逻辑,指出了传媒对人的欲望塑造和对需要的遮蔽,在此基础上考察了现代传媒所生成的传媒无意识,以及传媒无意识在影响人们的审美趣味时所起的作用。     

论社会发展与人的全面发展

人的全面发展是一个逐步渐进，不断提高，不断完善的历史过程，是人类社会历史发展的必然趋势，也是社会发展的最终目标和最高理想。     

变系数中立型泛函微分方程解的振动性

本文研究变系数中立型泛函微分方程解的振动性，其中ｐｉ（ｔ）∈Ｃ（［ｔ_０，∞），Ｒ），ｑ（ｔ）∈Ｃ（［ｔ_０，∞），Ｒ~＋）．τｉ及σ均为正数，我们获得了保证这个方程的所有解振动的若干充分条件，所得推论推广和改进了已有的相应结果．     

浅谈规范体育技能教学对于构建中华民族良好形象和提高国民素质的重要意义

学校教育在任何民族发展的历程中都起着基石作用,这种作用蕴含着民族发展潜能,决定民族的整体素质和发展方向,因此学校教育要规范。学校体育是学校教育不可或缺的组成部分,更需要规范。体育教学是学校体育的重要组成部分。体育教学的核心是技能教学,它既是完成其他目标的载体,又是实现学生身体健康的重要手段,更是形成规范的体育技能的保障。学生掌握技能的规范程度,不仅为自身体育锻炼打基础,更重要的是代表国家规范标准和形象。这两方面都是中华民族未来发展的需要。     

让教育科研走进课堂

课堂教学是中小学实施素质教育的主渠道。提高教育质量，关键在于提高课堂教学的质量。基础教育课程改革能否有效实施，也主要看中小学课堂教学的变化。因此，广大中小学教师应该把课堂作为研究基地。加强对课堂教学的研究，积极创造条件努力“让教育科研走进课堂”，为改进课堂教学服务。     

Metadata Quality Control in Digital Repositories and Collections: Criteria,Semantics, and Mechanisms

This article evaluates practices on metadata quality control in digital repositories and collections using an online survey of cataloging and metadata professionals in the United States. The study examines (1) the perceived importance of metadata quality, (2) metadata quality evaluation criteria and issues, and (3) mechanisms for building quality assurance into the metadata creation process. The survey finds wide recognition of the essential role of metadata quality assurance. Accuracy and consistency are prioritized as the main criteria for metadata quality evaluation. Metadata semantics greatly affects consistent and accurate metadata application. Strong awareness of metadata quality correlates with the widespread adoption of various quality control mechanisms, such as staff training, manual review, metadata guidelines, and metadata generation tools. And yet, metadata guidelines are used less frequently as a quality assurance mechanism in digital collections involving multiple institutions.     

Relationship between shoulder roll and hand propulsion in the front crawl stroke

This study re-evaluated the magnitude of hand propulsion (HP) in the pull and push phases of the front crawl stroke and investigated the association between the angular velocity of shoulder roll (ω_SR) and hand propulsive lift (HP_L). ω_SR was computed in the plane normal to a forward direction for 16 skilled swimmers performing the front crawl stroke at a maximal sprinting pace. HP, hand propulsive drag (HP_D) and HP_L were determined by a dynamic pressure approach. HP and HP_D in the pull phase were greater than in the push phase (P < 0.05) while HP_L in the pull phase was similar to that in the push phase. Eleven swimmers out of the 16 swimmers had a significant within-swimmers correlation between ω_SR and HP_L in the push phase (P < 0.05). That is, HP_L increased in the push phase as the ω_SR of rolling back to the neutral position became faster. A swimmer should use more drag for hand propulsion in the pull phase and propulsion from drag and lift equally in the push phase. Based on the relationship between ω_SR and HP_L in the push phase, a possible stroke technique to enhance HP_L using ω_SR is discussed.     

Kinematics of judo breakfall for osoto-gari: Considerations for head injury prevention

Previous studies suggest that increasing the skill level of judokas will decrease the number of head injuries sustained during judo. However, the kinematics are poorly understood, making it difficult to establish an effective breakfall teaching programme. Therefore, we studied the kinematic parameters of breakfall for osoto-gari to identify the risk of judo-related head injuries by comparing experienced and novice judokas. This information will provide insight into developing a better prevention plan for judo-related head injuries.

A total of 10 experienced and 12 novice judokas volunteered to participate in this study. The kinematic data of the breakfall motion for osoto-gari were collected using a three-dimensional motion analysis technique (200 Hz).

We observed a significantly higher peak neck extension momentum in the novice group than in the experienced group. This suggests that neck extension momentum during breakfall is associated with the risk of head injuries during judo. In addition, the novice judokas demonstrated a significantly greater flexed pattern in the trunk and hip movement than the experienced judokas (P < 0.05). The results suggest that the trunk and lower extremity motion are important kinematic parameters that determine the skill level in performing the breakfall for osoto-gari.     

Relationships between clubshaft motions and clubface orientation during the golf swing

Since clubface orientation at impact affects ball direction and ball spin, the ability to control clubface orientation is one of the most important skills for golfers. This study presents a new method to describe clubface orientation as a function of the clubshaft motions (i.e., swing plane orientation, clubshaft angle in the swing plane, and clubshaft rolling angle) during a golf swing and investigates the relationships between the clubshaft motions and clubface orientation at impact. The club motion data of driver shots were collected from eight skilled golfers using a three-dimensional motion capture system. The degrees of influence of the clubshaft motions on the clubface orientation were investigated using sensitivity analysis. The sensitivity analysis revealed that the swing plane horizontal angle affected the clubface horizontal angle to an extent of 100%, that the clubshaft angle in the swing plane affected both the clubface vertical and horizontal angles to extents of 74 and 68%, respectively, and that the clubshaft rolling angle affected both the clubface vertical and horizontal angles to extents of -67 and 75%, respectively. Since the method presented here relates clubface orientation to clubshaft motions, it is useful for understanding the clubface control of a golfer.     

关于图的优美性的一个猜想的证明

在齿轮图的每个齿的顶端分别加上m1，m2，…，mn条长为1的边后构成的图称为预边星图，记为（m1，m2，…，mn）．当m1＝m2＝…＝mn＝k时，简记为，文［1］猜想；是优美图．本文巧妙地构造出一类优美标号．证明了（m1，m2，…，mn）是优美图．解决了［1］中的猜想．我们的方法与［1］比较更加简洁．