对普通高校青年教师健身活动现状的调查分析

对普通高校青年教师的健身活动现状、特点及存在的问题进行调查分析,并在此基础上进行了深入研究,旨在为高校广泛、有效地开展青年教师体育健身工作提供可行性方案,为规划高校体育发展提供相关的理论依据。     

我国体育中介机构发展的类型与模式

采用调查、文献资料等研究方法,结合我国体育市场发展的实际,揭示了我国体育中介机构面临的主要问题,分析了我国体育中介机构发展的主要类型与模式。     

基于大概念的综合实践活动课程设计

核心素养时代,指向素养发展的学习要求学生具备良好的知识结构和知识的跨情境、跨学科应用能力。立足于儿童经验与真实世界的综合实践活动课程是基于素养发展的学习,是培育学生综合素质的跨学科实践性课程。我国中小学综合实践活动课程的实施因其目标宽泛化、课程形式化、实践碎片化、实施两极化等现实问题而常常陷入无效实施的困境。基于大概念的综合实践活动课程以少量体现学科内部基本逻辑及学科之间有机联系的核心概念,打破学科壁垒的同时进一步联通学科知识和真实世界,是综合实践活动课程有效实施的重要依托。基于大概念的综合实践活动课程设计包括凝练课程目标、重构课程框架、匹配知识情境、设计迁移任务、解决真实问题、优化评估模式六大步骤。     

白细胞介素18及其生物活性

白细胞介素18(IL-18)是新近发现的一种细胞因子，能诱导TH1细胞等产生IFN-r，GM-CSF等细胞因子及Fas配体，具有增强THI细胞和NK细胞的细胞毒作用等免疫调节功能，在抗病原微生物感染、抗肿瘤及抗超敏反映等方面具有潜在的应用前景，同时，它也是内毒素诱导的小鼠肝坏死性休克的关键因子。     

Physical fitness of primary school children in relation to overweight prevalence and physical activity habits

Abstract

A cross-sectional study was carried out to analyse, through a limited number of fitness tests, the main conditioning and coordinative abilities in children aged 8–9 years, and their relationship with gender, anthropometric variables and physical activity habits. The height and weight of 256 boys and 241 girls were measured and information about physical activity habits was collected using a self-administered questionnaire. Physical performance was assessed by means of a few standardised tests: ‘sit & reach’, medicine-ball forward throw, standing long jump, 20 m running speed, and forward roll test. In both boys and girls, body weight and Body Mass Index (BMI) were positively correlated with the medicine-ball throw performances and negatively correlated for the standing long jump and speed tests, while no association was found with tests measuring back flexibility and total body coordination. Daily physical activity and participation in sport were not significantly correlated with body weight and BMI, but were positively associated with children's motor performance. The standardised fitness tests selected in the current study have been found to be suitable to identify fitness levels of primary school children. Thanks to their limited number and ease of measurement, they can be used in any school context to classify children and for monitoring the effects of targeted interventions promoting physical activity.     

美国图书馆“快照日”活动及其启示

全球金融危机对美国图书馆发展产生了巨大冲击,由美国新泽西州图书馆协会和新泽西州立图书馆于2009年首倡的图书馆快照日活动在减少消极影响方面取得了良好的社会效果。美国图书馆快照日活动具有项目内容多样化、项目策划模式化、宣传方式多样化等特点。我国图书馆开展读者活动时．应充分借鉴美国图书馆快照日活动的成功经验,改变以本位思想形成的推广思路,重视读者活动效果评估及评估结果,注重与社区、学校、文化机构、新闻媒体等团体间的合作,形成整体合力和规模效应,以更好地服务于读者。     

知识活动中的知识单元与知识计量研究

人类社会的知识活动根据其特征可以分为知识创造活动、知识管理活动和知识利用活动三类。知识计量贯穿知识活动全过程,但知识创造、知识管理和知识利用过程中对知识进行计量采用的知识单元不同。知识单元的构建是突破知识计量研究瓶颈的关键。参考文献16。     

"体育"本体论(三)——体育的本体和哲学矛盾

体育的生命力取决于是否有人去做,去实践,其本质很难用文字表达。这种体育的实践性与文字性表达的高度矛盾,正是体育在人类文明中具有的特殊之处。“体育的本体就是身体运动,即体育以身体运动本身为目的。”这样表达体育的本质既可以在操作性上排除被动运动、生活自理和工作等非体育,又可以在价值层上净化体育思想、保持体育的纯粹性。在哲学上,我们应处理好体育的两对矛盾:一、人的身体或意志谁是第一性的问题。二、“人”与“物”谁是第一性的问题。只有通过反复思考,我们才能从当今的体育现实中汲取一种智慧。     

MEASUREMENT OF THE DIELECTRIC PROPERTIES OF BIOLOGICAL TISSUE

An open-ended coaxial line reflection method especially suitable for meas-uring the dielectric properties of biological tissue in vivo is described.This method offersthe advantage of not requiring any special preparation of the samples to be measured but aclose contact with the open end of a coaxial line.It is,therefore,very convenient to acquirea large number of measurement data in broad band rapidly.The method may also be usedto measure the properties of other substances.The measuring system consists of a networkanalyzer controlled by a microcomputer and calibrated by using ANA procedure to elimi-hate the influnce of error network introduced by the adapter,some connectors,etc.In or-der to reach higher accuracy,the iterative method is used to determine the parameters ofthe equivalent circuit.Measurements of permeativities of some living tissues have been per-formed in the frequency band of 0.5-2GHz.Compared with the results known in somepapers,the validity of this method has been confirmed.The difference in dielectric proper-ties between living and dead tissues,and the tissue permeativites(ε)versus frequency andduration of measurement after death have also been measured.     

A cross-sectional examination of the physical fitness and selected health attributes of recreational all-terrain vehicle riders and off-road motorcyclists

Abstract

The aims of this study were: (1) to characterize selected fitness and health attributes of two types of habitual recreational off-road vehicle riders – off-road motorcyclists and all-terrain vehicle riders; (2) to explore differences among riders in terms of vehicle type, age, and gender; and (3) to compare the fitness and health of riders to population norms and clinical health standards. Canadian off-road riders (n = 141) of both sexes aged 16 years and over were recruited through local and national off-road riding organizations. Anthropometry, fitness, and health measures of off-road motorcycle and all-terrain vehicle riders were compared with population norms, health standards, and physical activity guidelines. Off-road motorcycle riders had above average aerobic fitness (79th percentile), while all-terrain vehicle riders were lower than average (40th percentile). All riders had a healthy blood lipid profile and a low incidence of the metabolic syndrome (12.9%) compared with members of the general population. Off-road motorcycle riders had healthier body composition and fitness than all-terrain vehicle riders; however, the body composition of off-road motorcycle riders was no healthier than that of the general population and all-terrain vehicle riders were worse than the general population. Off-road motorcycle riders had healthier anthropometry and fitness than all-terrain vehicle riders and thus fewer health risk factors for future disease, demonstrating that the physiological profiles of off-road riders are dependent on vehicle type.