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   

Immediate effects of the use of modified take-off boards on the take-off motion of the long jump during training     

Koyama H  Muraki Y  Ae M 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(2):139-153

We investigated the immediate effects of the combined use of inclined and raised flat boards on the take-off motion of the long jump. Eight male long jumpers were videotaped with two high-speed video cameras (250 Hz) set perpendicular to the runway. The athletes jumped with three modified take-off boards: upward-inclined boards of two different inclinations (2.5 and 5.0 degrees), and a raised flat board (50 mm high). The jumpers performed pre- and post-jumps using their own techniques before and after use of the boards to test their effects. The post- jump revealed significantly less reduction in the horizontal velocity during the take-off than the pre-jump, and the effectiveness of converting the velocity from horizontal to vertical increased significantly in the post-jump. The post-jump demonstrated significantly less knee flexion of the take-off leg during take-off. The reduced knee flexion and slower extension velocity of the take-off leg in the second phase of the post-jump contributed to increasing the knee extension torque in the second phase and resulted in the increases in vertical ground reaction force and vertical velocity. These results suggest that the combined use of the inclined and raised flat boards induced immediate effective changes in the kinematics and kinetics of the take-off motion and represent appropriate training tools for take-off techniques of the long jump.  相似文献   

The distance-time relationship over a century of running Olympic performances: A limit on the critical speed concept     

Dekerle J  Nesi X  Carter H 《Journal of sports sciences》2006,24(11):1213-1221

We analyse the evolution of the slope (critical speed) and the y-intercept (anaerobic distance capacity) of the linear distance-time relationship over a century of Olympic running performances. The distance-time relationship of each Olympic Games (1920-2004) was plotted using the performances in the 800-, 1500- and 5000-m track events. Values for critical speed and anaerobic distance capacity were determined by linear modelling. Mean performances for the 800, 1500 and 5000 m were 104.9 +/- 1.5 s (1.4%), 217.2 +/- 2.8 s (1.3%) and 808.9 +/- 18.4 s (2.3%), respectively. Critical speed improved during the first three-quarters of the twentieth century to reach a plateau in 1984. This is in accordance with the literature (Peronnet & Thibault, 1989) and suggests that "human aerobic endurance" has improved within the century (+13.4%) and tends to stabilize. Anaerobic distance capacity was highly variable over the century (coefficient of variation = 9.4%) and did not show a linear improvement over the years as has previously been suggested (Peronnet & Thibault, 1989). This could be due to an artefact in the application of the two-parameter model to only three Olympic performances. A limitation to the use of this linear mathematical model to fit physiological data may have been demonstrated.  相似文献   

诗二首     

D·H·劳伦斯  王竞 《世界文化》1992,(2)

资产阶级真令人恶心资产阶级真令人恶心,尤其是那些人中的男性。体面,冠冕堂皇,是否要我把他当作礼品送上?难道他不漂亮?不健康?不是极好 的样品?难道他外表不像个衣冠楚楚精神饱 满的英国佬?难道他不是上帝自身的形象,猎鹤鸽、打棒球,一天行走30英 里?难道你不羡慕,那么有钱,那么时 髦?不过,请等一下。让他体验一种新的情感,让他置身 于别人的困境,让他遇到道德的难题,或是生活迫使他要重新理解,那时我们可看到他垮了下来,像受潮的蛋白酥皮,我们可看到他一筹莫展,成了傻 瓜,或成了恶痞。当他的智力面临新的考脸,严峻的生死彼关的考验,且看…  相似文献   

冠军制造     

H.Smith!特约撰稿人 《篮球》2001,(2)

一切精彩源于一只小小篮球篮球运动作常精彩！由美国东海岸萌发的篮球运动，经过一个多世纪的洗礼，如今已风靡全球。在竞技体育的大餐中，篮球属于最有品味的极品佳肴。美国人可以不关心总统是姓布什或是姓戈尔，但没有一个真正的美国人可以不关心篮球。的确，一切精彩源于一只小小篮球。在百年前的美国东部，托马斯．伊．维尔胜（Ｔ．Ｅ．Ｗｉｌｓｏｎ）先生在处于工业革命前的小镇——芝加哥，开设了一个以自己名字命名的体育用品公司。为了维持公司的运行，老托马斯开始研制、生产篮球和橄榄球产品，在此之前，篮球的制造水平低下，工艺…  相似文献   

网络时代大众传播研究者面临的挑战与机遇——从受众研究和内容分析说起   总被引：3，自引：0，他引：3  

吉尔多·H·斯坦佩尔  罗伯特·K·斯图尔特  田青 《国际新闻界》2001,(4)

互联网似乎是一把双刃剑 ,它为受众调查和内容分析提供了新的机遇 ,但是多年来研究者们所遇到的一些老问题依然存在。大众传播研究趋于改善还是恶化 ,将取决于研究者使用互联网的技能。  相似文献   

我与“今夜不寂寞”     

沈楠 《新闻爱好者》1994,(7)

一个人的快乐,让大家分享,就能变成很多快乐;一个人的忧愁分给大家,也会减轻很多很多……  相似文献   

Dynamics of the basketball shot with application to the free throw     

Okubo H  Hubbard M 《Journal of sports sciences》2006,24(12):1303-1314

A completely general three-dimensional dynamic model is presented for the motion of basketball shots that may contact the rim, the backboard, the bridge between the rim and board, and possibly the board and the bridge simultaneously. Non-linear ordinary differential equations with six degrees of freedom describe the ball angular velocity and ball centre position. The model includes radial ball compliance and damping and contains five sub-models: purely gravitational flight, and ball-rim, ball-bridge, ball-board, and ball-bridge-board contact. Each contact sub-model has both slipping and non-slipping motions. Switching between the sub-models depends on the reaction force at, and velocity of, the contact point. Although the model can be used to study shots from any point on the court, we here use it to study the sets of free throw release angle, velocity, angular velocity, and lateral deviation angle that result in success (capture), as well as underhand free throws and those using an under-inflated ball. Free throw shots with larger backspin, lower inflation pressures, and underhand release conditions are shown to result in larger capture percentages.  相似文献   

Elite football on artificial turf versus natural grass: movement patterns, technical standards, and player impressions     

Andersson H  Ekblom B  Krustrup P 《Journal of sports sciences》2008,26(2):113-122

The aim of the present study was to examine the movement patterns, ball skills, and the impressions of Swedish elite football players during competitive games on artificial turf and natural grass. Time - motion analyses (36 observations) and technical analyses (16 team observations) were performed and 72 male and 21 female players completed a questionnaire. No differences were observed between artificial turf and natural grass in terms of total distance covered (mean 10.19 km, s = 0.19 vs. 10.33 km, s = 0.23), high-intensity running (1.86 km, s = 0.10 vs. 1.87 km, s = 0.14), number of sprints (21, s = 1 vs. 22, s = 2), standing tackles (10, s = 1 vs. 11, s = 1) or headers per game (8, s = 1 vs. 8, s = 1), whereas there were fewer sliding tackles (P < 0.05) on artificial turf than natural grass (2.1, s = 0.5 vs. 4.3, s = 0.6). There were more short passes (218, s = 14 vs. 167, s = 12) and midfield-to-midfield passes (148, s = 11 vs. 107, s = 8) (both P < 0.05) on artificial turf than natural grass. On a scale of 0-10, where 0 = "better than", 5 = "equal to", and 10 = "worse than", the male players reported a negative overall impression (8.3, s = 0.2), poorer ball control (7.3, s = 0.3), and greater physical effort (7.2, s = 0.2) on artificial turf than natural grass. In conclusion, the running activities and technical standard were similar during games on artificial turf and natural grass. However, fewer sliding tackles and more short passes were performed during games on artificial turf. The observed change in playing style could partly explain the male players' negative impression of artificial turf.  相似文献   

史提芬·斯皮尔伯格     

H.W.Fowler 《海外英语》2002,(10)

Just when you thought it was safe forSteven Spielberg to ease off,the most popular moviemaker of all time is going in new direc-tions at a storming pace.  相似文献