友谊与团结     

H·G·伽达默尔 《安徽师范大学学报(人文社会科学版)》2002,30(5):497-501

古代的哲学家几乎没有不在其理论、演说或著作中提到"友谊"这个概念.只有了解的人才会知道,大师亚里士多德在他的三本伦理学著作中赋予友谊概念以核心的地位;而康德这位思想上值得吾人敬重的哲人,在其人类学演讲录中,却只给友谊一页的篇幅.尽管如此,他还是说出了值得我们深思的真理:"真正的朋友稀少如黑色的天鹅."  相似文献   

Perception of kinematic characteristics of tennis strokes for anticipating stroke type and direction     

Shim J  Les Carlton G  Kwon YH 《Research quarterly for exercise and sport》2006,77(3):326-339

The purpose of this study was to determine the sources of visual information used by highly skilled tennis players in anticipating their opponent's shots. In Experiment 1, motion analysis of the strokes showed that the relative motion between the racquet and forearm was different between the ground strokes and lobs, but there were no reliable kinematic differences when shot direction was varied. In Experiment 2, 12 skilled tennis players observed the opponent hitting strokes in a normal video or in a point-light display with different segments occluded. Players' anticipation accuracy was not degraded by the use of the point-light display. Occluding the racquet and forearm significantly reduced the participant's ability to determine the type of stroke produced.  相似文献   

小Q填字     

阡陌·G 《当代学生》2002,(16)

横向一、八仙之一,有腿疾。二、骄傲使人受损,谦虚使人受益。三、欧美经典的形容友谊长久的老歌。四、传说中的天神,留长须,会返老还童。五、非洲北部的一个小国。六、北京的旧称。七、彼此互相了解而情谊深切的人。八、当代中国著名导演,代表作有《牧马人》等。  相似文献   

Success in elite cycling: A prospective and retrospective analysis of race results     

Schumacher YO  Mroz R  Mueller P  Schmid A  Ruecker G 《Journal of sports sciences》2006,24(11):1149-1156

The development of peak performances is a main research focus in sports science. It is unclear how many former top junior athletes achieve success in the elite class later. The aim of the present study was to examine the careers of athletes who participated in major junior or adult/elite cycling events using prospective and retrospective analysis of competition results. The official results of major junior (age < or = 18 years) and elite (age > 18 years) cycling races from 1980 to 2004 were analysed. Age-related aspects, career lengths, and success were compared between riders who presented results in both junior and elite races (JUNIOR ELITE) and riders who had no junior race results (ELITE ONLY). Altogether, 27,454 results of 8004 athletes from 108 countries were collected. We found that 29.4% of the elite athletes had participated in junior World Championships, and that 34% of the participants in junior World Championships later participated in major elite competitions. JUNIOR ELITE athletes are significantly more successful in several cycling disciplines and have their first and last elite result at a younger age than ELITE ONLY athletes. No difference was found in career lengths. The data presented here emphasize the importance of long-term training programmes in the development of peak performance in cycling.  相似文献   

The relationship between peak height velocity and physical performance in youth soccer players   总被引：1，自引：1，他引：0  

Philippaerts RM  Vaeyens R  Janssens M  Van Renterghem B  Matthys D  Craen R  Bourgois J  Vrijens J  Beunen G  Malina RM 《Journal of sports sciences》2006,24(3):221-230

Longitudinal changes in height, weight and physical performance were studied in 33 Flemish male youth soccer players from the Ghent Youth Soccer Project. The players' ages at the start of the study ranged from 10.4 to 13.7 years, with a mean age of 12.2 +/- 0.7 years. Longitudinal changes were studied over a 5 year period. Peak height velocity and peak weight velocity were determined using non-smoothed polynomials. The estimations of peak height velocity, peak weight velocity and age at peak height velocity were 9.7 +/- 1.5 cm x year-1, 8.4 +/- 3.0 kg x year-1 and 13.8 +/- 0.8 years, respectively. Peak weight velocity occurred, on average, at the same age as peak height velocity. Balance, speed of limb movement, trunk strength, upper-body muscular endurance, explosive strength, running speed and agility, cardiorespiratory endurance and anaerobic capacity showed peak development at peak height velocity. A plateau in the velocity curves was observed after peak height velocity for upper-body muscular endurance, explosive strength and running speed. Flexibility exhibited peak development during the tear after peak height velocity. Trainers and coaches should be aware of the individual characteristics of the adolescent growth spurt and the training load should also be individualized at this time.  相似文献   

对于鸽子和产卵问题的若干想法     

G·范·格雷姆贝根  刘正光 《环球赛鸽科技》2004,(6)

杂志编辑经常收到来信,有些信直接转给了我。读者们也许对这些来信的答复内容感兴趣。有一次,在给读者回信时,我探讨了产卵阶段的各方面问题。为了让读者理解我的解答,也许有必要给大家重提鸽子生殖系统的解剖学特征。  相似文献   

中国移民在俄国——中国移民对俄国远东发展的贡献   总被引：1，自引：0，他引：1  

亚历山大G·拉宁  李宏为 《历史档案》1994,(2)

本文作者系俄罗斯科学院远东研究所台湾研究部主任、高级研究员。本文译自治湾出版的《近代中国史研究通讯》1993年第16期。本文虽有不少提法和观点，为我们所不能同意，但文内提供了不少有关中国侨民在沙俄及前苏联的情况，有一定的参考的研究价值，故仍全文照译发表。  相似文献   

Row over anencephalic babies reaches Britain     

Vines G 《New scientist (1971)》1987,115(1568):17

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Take me, take my guinea pigs     

Vines G 《New scientist (1971)》1995,145(1961):49-50

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Frederick Rand Rogers: educational provocateur (1894-1972)     

Pennington G 《Canadian journal of history of sport and physical education》1981,12(1):24-50

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