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   2529篇
  免费   55篇
  国内免费   5篇
教育   1977篇
科学研究   64篇
各国文化   34篇
体育   207篇
文化理论   17篇
信息传播   290篇
  2023年   11篇
  2022年   15篇
  2021年   31篇
  2020年   47篇
  2019年   91篇
  2018年   125篇
  2017年   110篇
  2016年   98篇
  2015年   79篇
  2014年   81篇
  2013年   594篇
  2012年   69篇
  2011年   82篇
  2010年   61篇
  2009年   75篇
  2008年   84篇
  2007年   86篇
  2006年   61篇
  2005年   64篇
  2004年   48篇
  2003年   39篇
  2002年   54篇
  2001年   33篇
  2000年   39篇
  1999年   33篇
  1998年   30篇
  1997年   39篇
  1996年   37篇
  1995年   28篇
  1994年   38篇
  1993年   43篇
  1992年   25篇
  1991年   21篇
  1990年   28篇
  1989年   19篇
  1988年   10篇
  1987年   13篇
  1986年   17篇
  1985年   13篇
  1984年   10篇
  1983年   14篇
  1982年   11篇
  1981年   6篇
  1980年   7篇
  1979年   7篇
  1978年   10篇
  1977年   15篇
  1976年   5篇
  1975年   10篇
  1974年   9篇
排序方式: 共有2589条查询结果,搜索用时 15 毫秒
951.
Abstract

In the present study, we examined the performance environment of the England youth soccer teams. Using a semi-structured protocol with a prospective sample, national coaches (n = 6), sport scientists (n = 3), and players (n = 4) were interviewed directly following international tournaments about the factors that positively and negatively influenced performance. Qualitative content analysis revealed the following factors as major positive influences on performance: adhering to a consistent tournament strategy, player understanding, strong team cohesion, organized entertainment activities, detailed knowledge of opposition, an effective physical rest/recovery strategy, and previous tournament experience. Major factors perceived to have negatively influenced performance included: over-coaching, player boredom, player anxiety, physical superiority of the opposition, physical fatigue over the tournament, problems sleeping, and lack of information on the opposition. Eight overall dimensions emerged to describe the performance environment: planning and organization, physical environment, tactical factors, development and performance philosophy, psychological factors, physical factors, social factors, and coaching. The findings support recent work that suggests the performance environment is multifaceted, with performance being contingent upon a broad range of interacting factors that go beyond the traditional psychosocial and physical domains.  相似文献   
952.
Abstract

This study was designed to compare the effectiveness of two methods of teaching the tennis serve. College women (N=123) in six tennis activity classes at Georgia Southern College participated. The experimental group of 60 students started serving from the service court line and were gradually moved back to the base line. The control group of 63 students began serving from the base line in the traditional manner. After five weeks of practice both groups were given the same tennis serving test for accuracy and speed. The study showed no significant differences in the two teaching methods.  相似文献   
953.
There is evidence from previous cross-sectional studies that high volumes of certain sports, including running, swimming and cycling, may have a negative impact on bone mineral density. The aim of the present study was to evaluate prospectively the effects of high athletic training in individuals who engage in high volumes of all three of these activities (triathletes). Bone mineral density for the total body, arms and legs was determined by dual-energy X-ray absorptiometry in 21 competitive triathletes (9 men, 12 women) at the beginning of the training season and 24 weeks later. Age, body mass index, calcium intake and training volume were also recorded to examine potential mediators of bone mineral density change. Men had greater bone mineral density at all sites than women. No significant changes were observed over the 24 weeks for either total body or leg bone mineral density. Bone mineral density in both arms increased by approximately 2% in men ( P ? 0.03), but no change was observed for women. Change in bone mineral density at all sites was unrelated to age, body mass index, calcium intake and training volume. The results suggest that adverse changes in bone mineral density do not occur over the course of 6 months of training in competitive triathletes.  相似文献   
954.
Abstract

The purposes of this study were to (a) examine the stability and consistency of the Caltrac accelerometer (Hemokinetics, Madison, WI) and an activity record to assess physical activity in children and adults (Experiment 1), and (b) to determine if there is a relationship between parents and their children in physical activity level (Experiment 2). Thirty 5–9-year-old children and their biological parents wore Caltrac accelerometers for three consecutive days (including one weekend day). At the same time, parents completed a Caltrac Activity Record (CAL REC) for themselves and their child. Dependent variables were counts per day for the Caltrac and minutes of light activity and activity for the CAL REC. Between-day correlations for the Caltrac ranged from r = .73 to .87 for the parents (p < .001) and from r = .38 (p < .04) to .79 (p < .001) for the children. An analysis of variance with repeated measures indicated no significant differences for the Caltrac between days for parents and children. Between-day correlations for CAL REC ranged from r = .67 to .91 (p < .05) for parents and r = .36 to .72 (p < .05) for children, and there were no significant differences between days. In Experiment 2, χ2 analyses were used to examine familial resemblance in physical activity. Using the Caltrac, familial resemblance occurred in 67% (father and child) and 73% (mother and child) of the families. Using the CAL REC, familial aggregation was present in 70% (father and child) and 66% (mother and child) of the families. Thus, children of active and less active parents exhibited physical activity patterns similar to their parents.  相似文献   
955.
A critique of research examining whether early experiences with primary caregivers are reflected in adaptation is that relevant longitudinal studies have generally not employed genetically informed research designs capable of unconfounding shared genes and environments. Using the twin subsample (N = 485 pairs) of the Early Childhood Longitudinal Study-Birth Cohort, the current study provides evidence that early parental support (derived from observations at 24 months and around age 4, in prekindergarten) is associated with academic skills (r = .32), social competence (r = .15), and externalizing behavior (r = -.11) in kindergarten. Crucially, the shared environment accounted for virtually all of the correlation between parenting and academic skills, roughly half of the association between parenting and social competence, and approximately one fourth of the correlation between parenting and externalizing behavior.  相似文献   
956.
The vast majority of university students have profiles on social networking sites (e.g., Myspace, Facebook) (Salaway et al. 2008). However, it is yet to be determined what role this rapidly evolving method of communication will play in an academic setting. Data for the current study was collected from 459 university students and 159 university faculty members. Participants’ opinions regarding faculty/student interaction on social networking sties (SNSs) were analyzed. Over one-third of the students and a quarter of the faculty participants reported that it is inappropriate for faculty members to have accounts on SNSs. Significant disagreement existed between the faculty and students, as well as among the faculty and among the students regarding what constitutes appropriate professional professor/student interaction on SNSs.  相似文献   
957.
Educationalists are well able to find fault with rankings on numerous grounds and may reject them outright. However, given that they are here to stay, we could also try to improve them wherever possible. All currently published university rankings combine various measures to produce an overall score using an additive approach. The individual measures are first normalized to make the figures ‘comparable’ before they are combined. Various normalization procedures exist but, unfortunately, they lead to different results when applied to the same data: hence the compiler’s choice of normalization actually affects the order in which universities are ranked. Other difficulties associated with the additive approach include differing treatments of the student to staff ratio, and unexpected rank reversals associated with the removal or inclusion of institutions. We show that a multiplicative approach to aggregation overcomes all of these difficulties. It also provides a transparent interpretation for the weights. The proposed approach is very general and can be applied to many other types of ranking problem.  相似文献   
958.
The topic of cyberbullying is raising international debate and concern. Through the development and dissemination of a questionnaire 12 student researchers were supported in surveying 325 UK students across Years 7, 8 and 9 to gain further knowledge of this area, in relation to children and young people. Results were analysed and comparisons made between gender and age, allowing conclusions to be drawn about the area of cyberbullying and its many elements. Conclusions acknowledge that bullying has entered a “digital era” and professionals and adults require the knowledge and skills to help young people to further understand the issues involved and to protect themselves in this area.  相似文献   
959.
Research on masculinity has become an important area of gender and education that includes a wide range of empirical concerns and theoretical approaches. This article identifies a number of studies that are asking questions about the conceptual usefulness of masculinity within educational contexts. The first section explores how educational researchers are beginning to suggest alternative ways that hegemonic masculinity may be configured. The second section draws upon work that interrogates the disconnection of gender from sex. Such work considers the importance of understanding schooling worlds through an untethering of gender categories from physical bodies. The third section suggests the possibility of a post-masculinity position by exploring research that questions the viability of masculinity as a conceptual frame to understand gender. In conclusion, the paper argues that such developments can be used heuristically to inform the critical reflexiveness of future research in the area.  相似文献   
960.
Distance education (DE) in social work programs and studies on its comparable effectiveness with face-to-face education continue to increase. Yet not all faculty are convinced of the results, and this study explores why. Three case studies indicate that reservations center on valuing the process of learning and nonverbal communication. Issues regarding duty of care to families to be served by future social workers primarily educated in a virtual classroom also matter significantly. The trend toward DE may be inevitable, but this does not mean that educators should not voice their concerns; their skepticism has merit, and they have a responsibility to be vocal.  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