浅谈田径教学中的优化组合   总被引：1，自引：0，他引：1  

张明莲 《四川体育科学》2003,(4):84-85

在总结传统教学经验的基础上，对教师的知识结构、教学内容、教学方法、实践性教学以及教学评价等进行优化组合，指出优化组合是田径教学改革的关键，优化教师知识结构是田径教学改革的前提和基础，优化课程结构和教学内容是田径教学改革的重点。  相似文献   

论体育健身锻炼中的多因素组合     

潘国斌  赵晓红 《体育成人教育学刊》2003,19(3):49-50

体育健身锻炼效应是由不同因素组成的。通过对社区化人群健身锻炼多因素组合影响进行了较长时间的研究，初步建立了不同年龄组健身锻炼心率负荷参数，旨在为指导大众健身锻炼提供有益的参考。  相似文献   

The Pacific Science Board in Micronesia: Science,Government, and Conservation on the Post-War Pacific Frontier     

Kroll  Gary 《Minerva》2003,41(1):25-46

This article examines the planningand execution of scientific field work in thepost-war Micronesian Trust Territory, under theaegis of the Pacific Science Board (within theNational Research Council). It argues that thework of the PSB can be characterized as both`big natural history', and routine `frontierscience' in that scientific expertise wasintended to aid in managing the Trust. It alsoexamines the limitations of scientists whostruggled to extend American conservation andpreservation strategies on distant Pacificfrontier territories.  相似文献   

龙岩市社区群众体育现状调查与对策研究   总被引：3，自引：0，他引：3  

邱应龙  黄华祥  黄强  林宇峰  唐月香  卢玉龙  彭宗跃 《体育科学研究》2003,7(3):23-30

运用文献资料、问卷调查、数据统计等方法，对龙岩市所属7个县、市、区城镇办事处、社区居民委员会的体育组织形式与网络特征和18岁—60岁以上社会各阶层人群进行大规模的社会学的调查。研究结果表明：龙岩市群众体育事业有了较大的发展；城镇居民的体育意识、行为和消费等方面都发生了很大的变化；但与沿海地区相比，仍有较大的差距；探寻存在问题的原因，提出调动各阶层人群参与体育活动的对策与措施。  相似文献   

2002世界杯足球决赛中国队守门员位置防守技术运用分析     

张强  张力  董向荣  张立平 《四川体育科学》2003,(4):43-45

主要运用观察和统计归纳的方法，对中国队参加第17届世界杯足球赛决赛阶段比赛的守门员位置防守技术运用情况进行分析。结果表明，判断选位与反应能力的不足，导致中国队守门员防射门技术运用失误增多，防守的成功率降低；比赛中中国队守门员把握出击的能力低，出击欠灵巧机变，强对抗条件下难以有效发挥位置防守优势，守门员技术稳定是心理稳定的体现，训练实践中既要加强守门员意识引导，更要加强守门员意志的培养，努力改变比赛中守门员技术不过硬的现状。  相似文献   

论中长跑的早期化训练   总被引：2，自引：0，他引：2  

左晓东 《体育成人教育学刊》2003,19(3):84-85

对少年儿童在中长跑项目的早期化训练问题，从中长跑项目的本身特点和少年儿童的身体发育特点方面进行了分析和探讨，认为中长跑项目的早期化训练是可行的，也是必要的，并提出了进行早期化训练应注意的问题。  相似文献   

Sound and unsound options for reform     

Chester E. Finn 《Academic Questions》2005,18(1):79-86

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Showers produced by penetrating rays     

W.F.G. Swann  W.E. Ramsey 《Journal of The Franklin Institute》1940,229(3):388-389

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Expert systems: They’re here now     

Kim E. Ruyle 《TechTrends》1989,34(1):41-43

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The elimination of hypo from photographic images     

J.I. Crabtree  G.T. Eaton  L.E. Muehler 《Journal of The Franklin Institute》1940,230(6):701-725

It is very difficult, if not impossible, to remove the last traces of hypo from photographic papers by any known procedure of washing. The sulfur in the residual hypo ultimately, and especially under abnormal conditions of temperature and humidity, combines with the silver image to form yellowish brown silver sulfide. This phenomenon is known as sulfiding or “fading” of the image. The various factors which affect the rate of fading of images and the washing out of hypo from films and papers are outlined.Chemical methods of hypo elimination have been proposed from time to time but the majority of these have not been satisfactory because they tend to leave substances such as thionates in the photographic material, which are equally as difficult to wash out as hypo and which also tend to sulfide or fade the silver image. A new hypo eliminator is recommended consisting of two volatile chemicals, hydrogen peroxide and ammonia. This eliminator oxidizes the hypo to sodium sulfate, which is inert and soluble in water, while any excess eliminator evaporates on drying.Two formulas and treatments are proposed: (1) Complete elimination of hypo for use by the professional, advanced amateur, and photofinisher who demand the highest standard of photographic quality in their prints.(2) Almost complete elimination of hypo (less than o.oi milligram per square inch).Since the conditions to which prints will be subjected are rarely known in advance, use of the “complete elimination treatment” is advised in all cases.  相似文献