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   231篇
  免费   6篇
教育   161篇
科学研究   21篇
各国文化   2篇
体育   32篇
文化理论   6篇
信息传播   15篇
  2022年   3篇
  2021年   3篇
  2020年   7篇
  2019年   15篇
  2018年   16篇
  2017年   15篇
  2016年   9篇
  2015年   6篇
  2014年   1篇
  2013年   50篇
  2012年   8篇
  2011年   4篇
  2010年   4篇
  2009年   5篇
  2008年   3篇
  2007年   7篇
  2006年   3篇
  2005年   6篇
  2004年   4篇
  2003年   3篇
  2002年   3篇
  2001年   1篇
  2000年   3篇
  1999年   5篇
  1998年   5篇
  1997年   4篇
  1996年   3篇
  1995年   3篇
  1994年   1篇
  1993年   2篇
  1992年   1篇
  1991年   2篇
  1990年   2篇
  1988年   4篇
  1986年   3篇
  1984年   1篇
  1983年   1篇
  1982年   2篇
  1981年   3篇
  1978年   4篇
  1977年   1篇
  1976年   1篇
  1975年   2篇
  1974年   2篇
  1973年   1篇
  1972年   1篇
  1971年   1篇
  1967年   1篇
  1934年   1篇
  1926年   1篇
排序方式: 共有237条查询结果,搜索用时 31 毫秒
51.
52.
The concept of competitive displacement is central to theories of media evolution, and the threat that the Internet has posed to printed newspapers provides an ongoing case study on the topic. In particular, this situation offers an opportunity to examine the strategic efforts of print newspapers to prevent competitive displacement, as well as the effectiveness of these strategies. This article addresses these issues through an analysis of a unique data set, constructed from 20 years of newspaper circulation data, as well as data on local market characteristics, newspaper staffing and content variety, and state-level Internet penetration. Specifically, this article examines whether, and to what extent, these competitive strategies impacted local print newspaper circulation trends over this 20-year time period. This analysis focuses on the following strategic responses: (a) newspapers’ launching of online versions (a diversification strategy within the language of media evolution literature); and (b) newspapers’ efforts to cover a greater variety of subject areas, as measured by the number of editors and special editorial sections produced. (The authors characterize these as a “mimicking” strategy from media evolution literature, as this strategy essentially represents an effort to simulate the much greater content variety that readers can find online). This article examines the relationships between these circulation, strategic, and Internet penetration variables over a 20-year time period, while also taking into account relevant characteristics of local newspaper markets.  相似文献   
53.
ABSTRACT

This study aimed to compare the weekly natural log of the root-mean-square difference of successive normal inter-beat (RR) intervals (ln RMSSDWeekly) and its coefficient of variation (ln RMSSDCV) in response to 5 weeks of preseason training in professional male futsal players. A secondary aim was to assess the relationship between ln RMSSDWeekly and ln RMSSDCV. The ln RMSSD is a measure of cardiac–vagal activity, and ln RMSSDCV represents the perturbations of cardiac autonomic homeostasis, which may be useful for assessing how athletes are coping with training. Ten futsal players had their resting ln RMSSD recorded prior to the first daily training session on four out of approximately five regular training days · week?1. Session rating of perceived exertion (sRPE) was quantified for all training sessions. Despite weekly sRPE varying between 3455 ± 300 and 5243 ± 463 arbitrary units (a.u.), the group changes in ln RMSSDWeekly were rated as unclear (using magnitude-based inference), although large inter-individual variability in ln RMSSD responses was observed. The ln RMSSDCV in weeks 4 and 5 were likely lower than the previous weeks. A large and significant negative correlation (r = ?0.53; CI 90%: ?0.36; ?0.67) was found between ln RMSSD and ln RMSSDCV. Therefore, monitoring individual ln RMSSD responses is suggested since large inter-individual variations may exist in response to futsal training. In addition, higher values of ln RMSSD are associated with lower oscillations of cardiac autonomic activity.  相似文献   
54.
Improved understanding of mobility performance in wheelchair basketball is required to increase game performance. The aim of this study was to quantify the wheelchair-athlete activities of players in different field positions and of different playing standard during wheelchair basketball matches. From video analysis, absolute and relative duration and frequency of wheelchair movements and athlete control options were examined in 27 national standard and 29 international standard players during entire wheelchair basketball matches. Between-group factorial analysis of variances identified that national players drove more forward (42.6 ± 6.8 vs. 35.4 ± 3.7%; effect size Cohen’s d (ES) = 1.48) and started more often driving forward (33.9 ± 2.6 vs. 31.8 ± 2.8; ES = 0.77) during a match while the mean activity duration for a single driving forward activity was longer (4.3 ± 0.9 vs. 3.7 ± 0.6 s; ES = 0.75) than for international players. Furthermore, national players performed fewer rotational movements (21.8 ± 4.0 vs. 28.9 ± 7.8%; ES = –1.30) and started less often with the rotational movements (35.0 ± 3.6 vs. 40.5 ± 5.5; ES = –1.21) while the mean activity duration for a single rotation activity was shorter (2.1 ± 0.3 vs. 2.3 ± 0.3 s; ES = –0.67) than for international players. Differences in mobility performance among guard, forward and centre players were minimal. The results should help wheelchair basketball coaches specify wheelchair-handling training techniques and means to optimise wheelchair-athlete configurations.  相似文献   
55.
56.
57.
Courses: Public speaking, business and professional communication, group communication

Objectives: This activity will introduce Monroe's Motivated Sequence as a way to organize persuasive arguments; improve students’ ability to deliver presentations with consistent content, voice, and style; and improve team-based delivery skills.  相似文献   

58.
Longitudinal data are often collected in waves in which a participant’s data can be collected at different times within each wave, resulting in sampling-time variation that is unaccounted for when waves are treated as single time points. Little research has been reported on the effects of this temporal imprecision on longitudinal growth-curve modeling. This article describes the results of a simulation study into the effect of sampling-time variation on parameter estimation, model fit, and model comparison with an empirical validation of the model fit and comparison results.  相似文献   
59.
How do academics make sense of university policies and strategic initiatives and act on them? Interviews were conducted with 27 mid-career academics in different disciplines, different research-intensive university environments and two countries (England and Australia). Data were analysed iteratively utilising a critical realist perspective, specifically, Archer’s modes of reflexivity. The paper argues that individuals’ responses to university policies and initiatives, to changes in policy and policy conflicts, can at least partially be understood through interrogating the modes of reflexivity they employ.  相似文献   
60.
The present paper explores middle‐class fathers’ educational work by studying how they and their partners are involved in their children’s education at home, in school, and how they investigate school options and make decisions about educational issues. Drawing on data from an ethnographic study of 30 dual‐earner couples in the Greater Los Angeles area, this article analyses how fathers position themselves in relation to discourses on parental involvement in education. In order to demonstrate the variety of ways fathers are involved three case studies are presented. It is illustrated how the men, by drawing on a discourse on involved fatherhood, position themselves in line with an ideal of parental involvement in education. Fathers who are doing less educational work than their spouses offer accounts for not taking a greater educational responsibility by drawing on a breadwinner discourse or by depicting mothers as gatekeepers of father involvement.  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