全文获取类型
收费全文 | 1958篇 |
免费 | 52篇 |
国内免费 | 1篇 |
专业分类
教育 | 1594篇 |
科学研究 | 44篇 |
各国文化 | 27篇 |
体育 | 85篇 |
文化理论 | 12篇 |
信息传播 | 249篇 |
出版年
2023年 | 8篇 |
2022年 | 19篇 |
2021年 | 26篇 |
2020年 | 28篇 |
2019年 | 56篇 |
2018年 | 89篇 |
2017年 | 93篇 |
2016年 | 83篇 |
2015年 | 75篇 |
2014年 | 65篇 |
2013年 | 478篇 |
2012年 | 54篇 |
2011年 | 76篇 |
2010年 | 44篇 |
2009年 | 45篇 |
2008年 | 66篇 |
2007年 | 46篇 |
2006年 | 46篇 |
2005年 | 38篇 |
2004年 | 42篇 |
2003年 | 30篇 |
2002年 | 46篇 |
2001年 | 37篇 |
2000年 | 23篇 |
1999年 | 21篇 |
1998年 | 19篇 |
1997年 | 19篇 |
1996年 | 42篇 |
1995年 | 25篇 |
1994年 | 26篇 |
1993年 | 29篇 |
1992年 | 22篇 |
1991年 | 16篇 |
1990年 | 23篇 |
1989年 | 10篇 |
1988年 | 10篇 |
1987年 | 7篇 |
1986年 | 14篇 |
1985年 | 9篇 |
1984年 | 10篇 |
1983年 | 10篇 |
1982年 | 11篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1979年 | 12篇 |
1978年 | 10篇 |
1977年 | 13篇 |
1976年 | 4篇 |
1974年 | 3篇 |
1972年 | 2篇 |
排序方式: 共有2011条查询结果,搜索用时 15 毫秒
71.
To increase participation of students of color in science graduate programs, research has focused on illuminating student experiences to inform ways to improve them. In biology, Black students are vastly underrepresented, and while religion has been shown to be a particularly important form of cultural wealth for Black students, Christianity is stigmatized in biology. Very few studies have explored the intersection of race/ethnicity and Christianity for Black students in biology where there is high documented tension between religion and science. Since graduate school is important for socialization and Black students are likely to experience stigmatization of their racial and religious identity, it is important to understand their experiences and how we might be able to improve them. Thus, we interviewed 13 Black Christian students enrolled in biology graduate programs and explored their experiences using the theoretical lens of stigmatized identities. Through thematic content analysis, we revealed that students negotiated experiences of cultural isolation, devaluation of intelligence, and acts of bias like other racially minoritized students in science. However, by examining these experiences at the intersection of race/ethnicity and religion, we shed light on interactions students have had with faculty and peers within the biology community that cultivated perceptions of mistrust, conflict, and stigma. Our study also revealed ways in which students' religious/spiritual capital has positively supported their navigation through biology graduate school. These results contribute to a deeper understanding of why Black Christian graduate students are more likely to leave or not pursue advanced degrees in biology with implications for research and practice that help facilitate their success. 相似文献
72.
The dominant understanding of Internet censorship posits that blocking access to foreign-based websites creates isolated communities of Internet users. We question this discourse for its assumption that if given access people would use all websites. We develop a conceptual framework that integrates access blockage with social structures to explain Web users’ choices, and argue that users visit websites they find culturally proximate and that access blockage matters only when such sites are blocked. We examine the case of China, where online blockage is notoriously comprehensive, and compare Chinese Web usage patterns with those elsewhere. Analyzing audience traffic among the 1000 most visited websites, we find that websites cluster according to language and geography. Chinese websites constitute one cluster, which resembles other such geolinguistic clusters in terms of both its composition and its degree of isolation. Our sociological investigation reveals a greater role of cultural proximity than access blockage in explaining online behaviors. 相似文献
73.
Microfluidic devices allow for the production of physiologically relevant cellular microenvironments by including biomimetic hydrogels and generating controlled chemical gradients. During transport, the biomolecules interact in distinct ways with the fibrillar networks: as purely diffusive factors in the soluble fluid or bound to the matrix proteins. These two main mechanisms may regulate distinct cell responses in order to guide their directional migration: caused by the substrate-bound chemoattractant gradient (haptotaxis) or by the gradient established within the soluble fluid (chemotaxis). In this work 3D diffusion experiments, in combination with ELISA assays, are performed using microfluidic platforms in order to quantify the distribution of PDGF-BB and TGF-β1 across collagen and fibrin gels. Furthermore, to gain a deeper understanding of the fundamental processes, the experiments are reproduced by computer simulations based on a reaction-diffusion transport model. This model yields an accurate prediction of the experimental results, confirming that diffusion and binding phenomena are established within the microdevice. 相似文献
74.
Angela Schattner 《Sport in History》2014,34(2):198-222
By looking at sports facilities for non-professional players in England, this article explores early commercialization tendencies in sports that proceeded the process driven by the professionalization of sports in the eighteenth century. A growing demand for purpose-built sporting facilities gave rise to commercialized tennis courts, bowling alleys and greens in London as early as the beginning of the sixteenth century which mainly addressed upper class ‘gentlemen’. These facilities were not mere sports venues but created semi-public leisure venues where particularly men could meet outside their homes and enjoy sports, gambling, drinking and other entertainments together. They were also strongly embedded in a wider network of similar semi-public facilities such as alehouses, taverns and inns that offered multi-functional services. Taking the examples of London and Bath, the article explores the growth and organization of tennis courts, bowling alleys and greens on a local level, and how these were interlinked with other contemporary leisure and entertainment businesses. 相似文献
75.
Frederick W. Derrick Nancy A. Williams Charles E. Scott 《Journal of Cultural Economics》2014,38(2):173-189
This paper advances the ongoing discussion of methods for predicting movie box office revenues with two contributions to the methodology and an out-of-sample test of the model. The first innovation is the development of a two-stage model using publicly available pre-release indicators to predict (1) initial week and (2) subsequent run box office revenues. To incorporate the experience-good nature of movies, the second stage is estimated by incorporating a proxy variable for box office success during the first week relative to predicted first week success. The second contribution is an empirical test of De Vany and Walls’ (J Econ Dyn Control 28:1035–1057, 2004) finding that the distribution of movie revenues has “heavy tails” and follows a non-Gaussian stable distribution with infinite variance. We estimate the two-stage model of a movie’s box office success on all general release movies in 1 year with both the Gaussian and stable distribution with heavy tails and infinite variance and find no evidence for the stable distribution in either stage of the estimation. This two-stage model is validated by comparing all general release movies in 3 future years (out-of-sample data) to the model’s predictions. 相似文献
76.
Bonnie L. Walker Nancy J. Osgood James P. Richardson Paul H. Ephross 《Educational gerontology》2013,39(5):471-489
This study compared staff and elderly knowledge, attitudes, and practices related to sexual expression by elderly persons in a long‐term care setting. Volunteers (N = 194) responded agree or disagree to 159 items. Significant differences were observed between the staff and elderly responses on 36 items. Areas of greatest differences involved knowledge and attitudes about consensual sex and sexual abuse, issues related to family attitudes toward remarriage and sexual expression, and age‐related changes and health problems related to sexuality. Items related to masturbation received the greatest percentage of no response. The staff had significantly higher total scores as compared to the elderly reflecting more knowledge, positive attitudes, and support for more proactive responses toward elderly sexuality. Findings have major implications for staff training in long‐term care settings. 相似文献
77.
78.
79.
80.