首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   639篇
  免费   17篇
教育   499篇
科学研究   15篇
各国文化   6篇
体育   90篇
文化理论   4篇
信息传播   42篇
  2023年   4篇
  2022年   10篇
  2021年   13篇
  2020年   23篇
  2019年   37篇
  2018年   43篇
  2017年   34篇
  2016年   34篇
  2015年   25篇
  2014年   25篇
  2013年   151篇
  2012年   25篇
  2011年   20篇
  2010年   19篇
  2009年   25篇
  2008年   20篇
  2007年   10篇
  2006年   11篇
  2005年   14篇
  2004年   9篇
  2003年   9篇
  2002年   10篇
  2001年   5篇
  2000年   4篇
  1999年   8篇
  1998年   1篇
  1997年   4篇
  1996年   7篇
  1995年   7篇
  1994年   4篇
  1993年   10篇
  1992年   7篇
  1991年   1篇
  1990年   3篇
  1989年   3篇
  1988年   6篇
  1987年   2篇
  1986年   2篇
  1985年   1篇
  1983年   1篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1976年   3篇
  1975年   1篇
  1971年   1篇
排序方式: 共有656条查询结果,搜索用时 31 毫秒
141.
142.
In recent years, academic libraries have expanded their traditional focus on intellectual and scholarly pursuits, with many libraries now initiating programs that support student growth, development, and wellness. Although providing animal-assisted activities to college students is a fairly new concept, the social and therapeutic benefits of pet ownership or simply interacting with a companion animal are well documented. The University of Connecticut's Homer Babbidge Library on the Storrs campus chose to support the physical and emotional well-being of students during the stress-filled week of finals by providing therapy dogs. Student interaction and feedback were overwhelmingly positive.  相似文献   
143.
Previous work on dynamics of interpersonal interactions in 1 vs. 1 sub-phases of basketball has identified changes in interpersonal distance between an attacker and defender as a potential control parameter for influencing organizational states of attacker-defender dyads. Other studies have reported the constraining effect of relative velocity between an attacker and defender in 1 vs. 1 dyads. To evaluate the relationship between these candidate control parameters, we compared the impact of both interpersonal distance and relative velocity on the pattern-forming dynamics of attacker-defender dyads in the sport of rugby union. Results revealed that when interpersonal distance achieved a critical value of less than 4 m, and relative velocity values increased or were maintained above 1 m x s(-1), a successful outcome (i.e. clean attempt) for an attacker was predicted. Alternatively, when values of relative velocity suddenly decreased below this threshold, at the same critical value of interpersonal distance, a successful outcome for the defender was predicted. Data demonstrated how the coupling of these two potential, nested control parameters moved the dyadic system to phase transitions, characterized as a try or a tackle. Observations suggested that relative velocity increased its influence on the organization of attacker-defender dyads in rugby union over time as spatial proximity to the try line increased.  相似文献   
144.
145.
Recently in the Journal of Sports Sciences, Schaun et al. published a study on the comparison of energy expenditure between high-intensity interval training and moderate continuous training performed in water. With this Letter to the Editor, we would like to comment on the methodological aspects that should be considered to analyze the results presented, as well as the conclusions.

Abbreviations: CONT, moderate-intensity continuous training; EPOC, excess post-exercise oxygen consumption; HIIT, high-intensity interval training; VO2max, maximal oxygen consumption.  相似文献   

146.
147.
Hand paddles and parachutes have been used in order to overload swimmers, and consequently increase the propulsive force generation in swimming. However, their use may affect not only kinematical parameters (average speed, stroke length and stroke rate), but also time gaps between propulsive phases, assessed through the index of coordination (IdC). The objective of this study was to assess the effects of hand paddles and parachute use, isolated or combined, on kinematical parameters and coordination. Eleven swimmers (backstroke 50-m time: 29.16 ± 1.43 s) performed four 15-m trials in a randomised order at maximal intensity: (1) without implements (FREE), (2) with hand paddles (HPD), (3) with parachute (PCH) and (4) with hand paddles plus parachute (HPD+PCH). All trials were video-recorded (60 Hz) in order to assess average speed, stroke rate, stroke length, five stroke phases and index of coordination. When average swimming speed was compared to FREE, it was lower in PCH and HPD+PCH, and higher in HPD. Stroke rate decreased in all overloaded trials compared to FREE. The use of hand paddles and parachute increased and decreased stroke length, respectively. In addition, propulsive phase duration was increased when hand paddles were used, and time gaps shifted towards zero (no time gap), especially when hand paddles were combined with parachute. It is conceivable that the combined use of hand paddles and parachute, once allowing overloading both propulsive and resistive forces, provides a specific stimulus to improve muscle strength and propulsive continuity.  相似文献   
148.
149.
Ka Mate     
  相似文献   
150.
In a climate where, it is claimed, children now spend very little time out of doors because adults fear for their safety and impose a ‘zero risk childhood’ on them, Forest School aims to offer learners the opportunity to take ‘supported risks’. This study investigated perceptions of risk associated with the outdoors, held by children, their parents and practitioners, and whether accessing Forest School impacts on these perceptions of risk. Practitioners were generally either strongly risk-averse or strongly permissive; Forest School influenced them to be less risk-averse in some respects. Parents held ambiguous perceptions, wanting to keep their children very safe but also to help them develop strong and confident attitudes to risk. Implications for research and practice are discussed.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号