Dribbling determinants in sub-elite youth soccer players

Dribbling speed in soccer is considered critical to the outcome of the game and can assist in the talent identification process. However, little is known about the biomechanics of this skill. By means of a motion capture system, we aimed to quantitatively investigate the determinants of effective dribbling skill in a group of 10 Under-13 sub-elite players, divided by the median-split technique according to their dribbling test time (faster and slower groups). Foot-ball contacts cadence, centre of mass (CoM), ranges of motion (RoM), velocity and acceleration, as well as stride length, cadence and variability were computed. Hip and knee joint RoMs were also considered. Faster players, as compared to slower players, showed a 30% higher foot-ball cadence (3.0 ± 0.1 vs. 2.3 ± 0.2 contacts · s^?1, P < 0.01); reduced CoM mediolateral (0.91 ± 0.05 vs. 1.14 ± 0.16 m, P < 0.05) and vertical (0.19 ± 0.01 vs. 0.25 ± 0.03 m, P < 0.05) RoMs; higher right stride cadence (+20%, P < 0.05) with lower variability (P < 0.05); reduced hip and knee flexion RoMs (P < 0.05). In conclusion, faster players are able to run with the ball through a shorter path in a more economical way. To effectively develop dribbling skill, coaches are encouraged to design specific practices where high stride frequency and narrow run trajectories are required.     

‘The Sole Anti-Democratic Federation in the Entire Olympic Movement’: Early International Association of Athletics Federations Development Initiatives Between Commercialization and Democratization, 1974–1987

Abstract

Studies on the development of Olympic Solidarity as a tool of the International Olympic Committee (IOC) to enable National Olympic Committees of developing countries access to resources and influence in the Olympic Movement exist. However, historical scholarship has relatively neglected the development of aid programs by International Federations to explain how they made use of resources to gain influence in international sport politics. Based on extensive multi-national and multi-lingual archival research in the archives of the International Association of Athletics Federation (IAAF) and the German Sport University Cologne, this article explores the establishment and development of the IAAF‘s Technical Aid Program, which had been installed in 1974. Referencing a large amount of previously unknown protocols and written correspondence, the paper critically discusses the IAAF‘s development activities in light of two parallel occurring processes that shaped the federation’s character in the 1970s and 1980s decisively: its increasing commercialization and its path towards democratization in its voting system. It is argued that the IAAF development programs served as a tool to enforce commercial and sport political interests whilst the nature of support remained without clear guidance until the mid-1980s.     

我国民事诉权理论存在问题及对策分析--由"郑传本名誉侵权案"引出的法律思考

我国民事诉讼理论目前以"二元论"作为通说,由于在实践中存在着一些误区,如把诉权视为审判权的产物、无视当事人的主体地位等,造成一些侵犯当事人诉权的现象.这需要从理论上对诉权做出准确定性,建立起诉权人权化的思想,真正重视当事人及其诉权,从而实现从法官公正到法律制度的公正.     

加强企业信息管理增加信息透明度

当前,企业内外日益要求企业提供真实信息,增加信息透明度,但企业信息失真时有发生,必须从提高企业负责人业务素质,增强责任感,加强企业外部监督、加强法制约束力等方面加强企业信息管理.     

RAID技术及其应用

讨论了RAID的优点、六个级别及其在实际应用中的几个问题     

社会转型加速期加强城市社区建设的意义

目前我国正处于社会转型加速期，在这一时期社会生活的各个方面，包括人们的劳动方式，生活方式，价值观念等都发生了深刻变化，带来了一系列问题，这在我国的城市社会尤为明显，加强城市社区建设将有助于解决社会转型过程中出现的某些问题，本文对此作以探讨。     

蔬菜栽培课程产学合作教育的实践与思考

选择具有日光温室、塑料大棚、中棚及露地等多种生产方式，蔬菜种类较多，面积较大，种植蔬菜历史较长，交通便利的村寨作为蔬菜栽培课程产学合作教育的基地。把学生分配到农户，每户3～4名学生为一组，与蔬菜生产实际紧密结合，让学生接受培养土的配制，种子处理与播种，苗床管理，定植，田间管理及嫁接育苗等环节的训练。结果表明：学生获得了两个层面的训练。在第一个层面上，学生熟练掌握了蔬菜栽培基本环节的技术要求和要领，动手能力得到明显提高，培养了学生的基本技能；在第二个层面上，学生掌握了蔬菜设施栽培、无公害生产综合配套等高层次技术，培养了学生综合技术应用能力。今后应特别注意学生和生产者(企业或农户)的双向参与，信息的双向传递，学校与生产者(或企业或农户)双赢，以及培养学生创新能力即第三个层面的训练。     

福建省帆板运动的现状和发展对策研究

通过对国内外帆板运动发展现状的分析,对福建省开展帆板运动的影响因素进行研究,提出了培养更多优秀的帆板运动员的方法,为福建省帆板项目的长远发展提供参考。     

我国教育管理伦理研究现状与反思

近二三十年来,我国在教育管理伦理研究方面取得了重要进展,主要体现为研究意义的认同、研究热点的形成以及多学科学者的共同参与等.同时也存在着问题研究深度不够均衡、实证研究稍显薄弱等局限,文章从四个方面对于我国教育管理伦理研究的进一步发展提出了期望.     

大别山试验区体育赛事品牌开发现状及对策研究

采用文献资料法、逻辑分析法等研究方法,对大别山试验区体育赛事品牌的开发现状进行研究,深入分析大别山试验区体育赛事品牌的开发现状,并根据大别山试验区体育赛事品牌开发的优势,提出本土赛事影响力小,品牌赛事开发少等问题,并提出注重体育赛事品牌的引进与开发;组建专业化的赛事运作团队,培养专门的赛事管理人才等建议,以期为促进大别山体育赛事品牌可持续发展提供有益参考。