Preparation time influences ankle and knee joint control during dynamic change of direction movements

The influence of preparation time on ankle joint biomechanics during highly dynamic movements is largely unknown. The aim of this study was to evaluate the impact of limited preparation time on ankle joint loading during highly dynamic run-and-cut movements. Thirteen male basketball players performed 45°-sidestep-cutting and 180°-turning manoeuvres in reaction to light signals which appeared during the approach run. Both movements were executed under (1) an easy condition, in which the light signal appeared very early, (2) a medium condition and (3) a hard condition with very little time to prepare the movements. Maximum ankle inversion angles, moments and velocities during ground contact, as well as EMG signals of three lower extremity muscles, were analysed. In 180°-turning movements, reduced preparation time led to significantly increased maximum ankle inversion velocities. Muscular activation levels, however, did not change. Increased inversion velocities, without accompanying changes in muscular activation, may have the potential to destabilise the ankle joint when less preparation time is available. This may result in a higher injury risk during turning movements and should therefore be considered in ankle injury research and the aetiology of ankle sprains.     

图书馆动态文献补失系统的设计与实现

图书馆流通中的图书、非书资料等文献,由于乱架、损毁、被偷等多种因素导致未能在架上正常流通,给读者使用带来了诸多困惑与不便。该文简要介绍了国内外解决此问题的方法与存在的不足。“图书馆动态文献补失系统”的设计与实现提供了一个通过技术手段合理有效解决此问题的途径。     

西部农村中小学阳光体育运动可持续发展的经费保障

采用问卷调查、访谈、数理统计等研究方法,对西部农村中小学开展阳光体育运动的经费现状进行实地调研。结果显示:《国家学生体质健康标准》测试器材的后续维护经费缺乏;学校公用经费紧张,体育设施及器材经费投入不足;学校公用体育经费被挤占,且随意性较大。从阳光体育运动可持续发展的视角提出:设立专项经费,扩大"阳光体育运动器材支持项目"范围及受益面;西部农村中小学阳光体育运动可持续发展的经费保障内容等。     

《国家学生体质健康标准》评价效能的反思与优化——大学生体质健康预警机制的构建

体质健康预警针对体质健康等级评定存在的信息缺失、学生体质健康发展的非均衡性、学生对体质健康评价结果不够重视等问题,以体质健康测试数据分析与健康预测为基础而建立的预警警示分析系统.通过对体质健康弱化状态进行分析、监控并发出预警.通过对个体体质健康信息的具体预警,促进学生对体质健康的关注,促进学生从心理上产生健康危机意识,从而产生改善体质健康的紧迫感和危机感,促进主动进行锻炼的自我健康管理.     

论对实施《学生体质健康标准》的价值取向

针对我国学生部分体能素质这几年呈现持续下降的趋势 ,《学生体质健康标准》的颁布实施 ,充分体现了“健康第一”的教育观 ,有利于“教测分离” ,促进学生自觉地参加体育活动 ,使学生养成终身体育锻炼的习惯 ,为素质教育的顺利进行创造了有利条件 ,对学校体育的全面改革具有十分重要的意义     

中长跑运动训练对心脏收缩时间间期的影响

采用MCA-3C心脏功能综合检测仪,观察男子中长跑运动员在功率自行车上进行递增负荷运动时心脏收缩时间间期各指标的变化,并与非运动员进行比较,从而对中长跑运动员的左心功能进行系统评价。结果发现：安静及递增负荷运动过程中中长跑运动员LVET和PEP相对较长;递增负荷运动过程中,中长跑运动员心脏功能表现出优于普通大学生的心脏功能水平。     

论艰苦奋斗精神

艰苦奋斗是我们党的光荣传统和政治本色。在新的历史时期,艰苦奋斗精神的内涵也在不断丰富,具有不可磨灭的历史价值,更具有不可低估的时代价值和强大的生命力。提倡艰苦奋斗、勤俭节约,反对奢侈浪费、骄奢淫逸仍在当今新的历史时期显得尤为重要。弘扬艰苦奋斗精神,就要牢固树立社会主义荣辱观,加强艰苦奋斗精神的宣传教育,在工作和生活中身体力行,用艰苦奋斗精神去激励我们开创社会主义现代化建设事业新局面。     

Using the Objective Borderline Method (OBM) to support Board of Examiners’ decisions in a medical programme

Decisions about progress through an academic programme are made by Boards of Examiners, on the basis of students’ course assessments. For most students such pass/fail grading decisions are straightforward. However, for those students whose results are borderline (either at a pass/fail boundary or boundaries between grades) the exercise of some discretion by university staff is required. In the interests of the transparency of the exercise of this discretion and to increase the chances that the ‘right’ decision is made, we tested the validity of the second version of the Objective Borderline Method (OBM2) decision-making tool in a medical programme. Our results suggest that application of OBM2 provides valid data to help university staff make robust decisions about a student’s progression through a programme, and with which to defend these decisions if that should be required.     

新课标理念下的高中英语课堂教学评价

普通高中新课程是面向21世纪基础教育课程改革的重要组成部分,其中课程评价改革中的重要内容之一是课堂教学评价的改革。回顾我国基础教育课程改革10周年,新课程的教学评价在观念上有了较大转变。以普通高中英语课程标准为指导,以"促进学生发展、促进教师成长以及以学论教"三大课堂教学评价理念,论述课堂教学评价中的"学生的学,教师的教和教师素养"三种构成要素,并指出改进课堂教学评价方式的建议及其意义,以期提高高中英语教师对课堂教学评价的新认识,促进教学水平的提高和教师的专业发展。     

零时间企业作业层面零时间点研究

零时间企业是按照零时间理念运作的企业，是21世纪企业的发展方向。基于时间的竞争要求零时间企业选择适当的零时间点。然而，零时间点作为零时间概念框架中的一个基础概念，目前尚未得到系统研究。章试图进行零时间点的理论分析．并着重从作业层面界定零时间企业的零时间点，弥补零时间概念框架中的缺憾。