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941.
The physiological demands of cross-country skiing require competitive skiers to have high maximal oxygen uptakes and anaerobic thresholds. Anaerobic capacity has a relatively less important role, but may be of greater importance today with the faster race velocities resulting from the new skiing techniques of ski skating. Although use of the ski skating techniques results in faster race velocities than the classical techniques, it has been found that under some conditions the double-pole technique is more economical than other skiing techniques. It is suggested that this results from a more effective storage and recovery of elastic energy, a greater proportion of the forces being directed along the line of travel, and a lower air resistance due to greater trunk and hip flexion with the double-pole technique. The greater economy of the double-pole technique suggests that this may be advantageous in certain race conditions if the upper body is adequately prepared. The greater propulsive forces generated with the upper body with ski skating also suggest that training of the upper body should receive more emphasis. The potential cardiovascular adaptations from cross-country ski training appear to be similar for the classical and skating techniques, yet training specificity is important for optimal performance. 相似文献
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India is one of the oldest civilizations with a kaleidoscopic variety and rich cultural heritage. It has achieved multi-faccted socio-economic progress during the last 47 years of its independence. This article reports on a survey of the usage of modern technologies (e.g. photocopiers, microfilming, computers, facsimile transmission, audio-visual, online searching and CD-ROMs) in Indian libraries. These libraries include university, engineering, scientific, medical, government and public libraries. The study used a questionnaire, personal visits to many libraries and interviews. The paper examines the impact of modern technologies on these libraries. It concludes with a summary of the problems faced by the librarians in adopting the modern technologies and suggests measures for implementation of modern technologies. 相似文献
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Are some Americans and Japanese beginning to think more similarly about independence and obedience? Middle-class adult respondents from the suburbs of Chicago and Tokyo (U.S.: 43 males and 54 females: Japan: 71 males and 80 females) were surveyed about their sex-role values. This report focuses on two values which have been recognised as constituting fundamental differences between Japanese and Americans: personal independence and obedience. The survey used a metric multidimensional scaling technique called Galileo®. Analyses of the data and results of other comparative studies suggest that any convergence taking place between the two societies is occurring primarily within American society. There is growing evidence, including the findings of this study, that Americans are moving away from their traditional stress on the importance of the individual in society. The Japanese respondents did show a more liberal conceptualization of the ideal woman with respect to obedience, however, there was no indication that this less traditional image of women extended to their other traditional roles in society. 相似文献
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