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The purpose of this study was to compare measures of body size in two samples of youth baseball players with normative data from the United States National Center for Health Statistics (NCHS) growth charts. One sample of youth baseball players participated in a local little league. The second sample of youth baseball players were members of eight of the twelve teams participating in the 1995 Dixie Youth World Series. Normative data for the United States (NCHS) were used as comparative data. Two trained anthropometrists measured standing height, sitting height, lower limb height, upper limb length, arm girth, calf girth, tricep skinfold, and abdomen skinfold on all participants. In both samples, pitchers, short stops, and first basemen were a more highly skilled group and exhibited larger body size (greater standing height, sitting height, lower limb height, upper limb length) than children who played at other positions. The standing height of local little league players was similar to the median of reference data at ages 7, 8, and 9 years. The standing height and weight of skilled players in both samples approximated the 75th percentile for standing height and weight at ages 10, 11, 12, and 13 years. The results suggest that baseball players exhibit larger body size than the normal population at young ages. Body size may be an important criterion used by coaches to select and assign young players to certain positions. 相似文献
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采用层次分析法对地方学院本科生科研能力要素的调查问卷进行统计分析,结果表明:文、理、工3类本科生科研能力各指标的重要度呈现相似性。3类本科生所需科研能力要素重要度排序与所学学科特点有一定的相关性。在具体排序方面,受学生就读学科特点的影响,3类本科生科研能力部分要素权重呈现出一些细小差别。 相似文献
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知识经济时代对编辑创新的要求 总被引：2，自引：0，他引：2
聂晶磊 《开封教育学院学报》2002,22(3):70-71
知识经济时代的核心和灵魂是创新。编辑工作也只有不断创新，才能跟上时代的步伐。这就要求编辑工作者做到以下几点：更新思想观念，强化编辑意识；积累文化知识，优化知识结构；理论联系实际，创造特色精品。 相似文献
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稀土类热稳定剂合成条件研究及性能测试 总被引：1，自引：0，他引：1
本对热稳定剂的合成条件进行了研究，确定了硬脂酸镧的最佳配方。对硬脂酸盐类热稳定剂的性能进行了测定，摸索了测定硬脂酸镧的分析方法。 相似文献
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聂付生 《上海师范大学学报(哲学社会科学版)》2001,30(1):95-100
冯梦龙编纂的<新列国志>在学术界至今尚未引起应有的重视,即使面世的几篇文章都以<东周列国志>为题,这对代表一个时代的文学大师是极不公平的.实际上,<新列国志>既能佐以历史,又能在史实的框架内任意虚构,驰骋想象,塑造了一大批栩栩如生的人物形象,结构错综复杂又井然有序,语言通俗而简练流畅,取得了使原作无可比拟的艺术成就. 相似文献
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职业的特殊性对体育教师的身体形态要求有别于其他职业。运用文献资料、访谈、问卷调查等方法探究身体形态与体育教师职业形象的关系,表明：公众对体育教师职业形象外在仪表中的体重和身高两项有较高要求,肥胖可降低其职业能力,进而有损职业形象地提升。体育教师职前拥有良好的体形,但职后10年内体重增加,超重和肥胖发生概率略高于其他人群,产生的原因也体现出独特性。运动时间和量剧减、饮食习惯意识薄弱、饮食无规律等不良生活方式是引起体育教师肥胖的重要环境因素,由此提出相应的策略。 相似文献
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DOMINIQUE MARCHIO JÈRÔME ADNOT IRÉNE ARDITI 《European Journal of Engineering Education》1997,22(4):411-419
Part-time vocational engineering curricula provide a response to a number of present-day demands related to economic developments. Their aim is to transform experienced higher technicians into engineering managers through a combination of knowledge derived from past experience in working positions and in new situations, with courses and activities in an academic institution. Synergy between the two streams can be achieved by specific means such as dual tutoring by the academic institution and the company, training in the capacity of synthesis regarding technological developments in progress, observation and analysis by the learner of his/her own work station, field research on team management and the writing of a final professional dissertation in the company. 相似文献
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梅伟强 《五邑大学学报(社会科学版)》1999,(3)
江门五邑是全国著名侨乡,众多的侨刊乡讯是其一大特色。文章介绍了它的历史发展及鲜明特色,分析了其长盛不衰的奥秘所在。 相似文献
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介绍数字电液控制系统在丰城电厂的应用,以及控制系统的结构、系统主要功能及应用中出现的问题。 相似文献