全文获取类型
收费全文 | 2118篇 |
免费 | 49篇 |
国内免费 | 3篇 |
专业分类
教育 | 1729篇 |
科学研究 | 140篇 |
各国文化 | 35篇 |
体育 | 103篇 |
文化理论 | 25篇 |
信息传播 | 138篇 |
出版年
2023年 | 19篇 |
2022年 | 22篇 |
2021年 | 34篇 |
2020年 | 65篇 |
2019年 | 98篇 |
2018年 | 138篇 |
2017年 | 123篇 |
2016年 | 117篇 |
2015年 | 62篇 |
2014年 | 86篇 |
2013年 | 437篇 |
2012年 | 90篇 |
2011年 | 76篇 |
2010年 | 74篇 |
2009年 | 67篇 |
2008年 | 53篇 |
2007年 | 50篇 |
2006年 | 51篇 |
2005年 | 43篇 |
2004年 | 33篇 |
2003年 | 39篇 |
2002年 | 28篇 |
2001年 | 24篇 |
2000年 | 18篇 |
1999年 | 23篇 |
1998年 | 17篇 |
1997年 | 13篇 |
1996年 | 18篇 |
1995年 | 10篇 |
1994年 | 7篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 16篇 |
1990年 | 10篇 |
1989年 | 13篇 |
1988年 | 12篇 |
1987年 | 7篇 |
1986年 | 10篇 |
1985年 | 15篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 7篇 |
1981年 | 12篇 |
1980年 | 8篇 |
1979年 | 11篇 |
1977年 | 8篇 |
1976年 | 7篇 |
1974年 | 5篇 |
1968年 | 4篇 |
1926年 | 4篇 |
排序方式: 共有2170条查询结果,搜索用时 15 毫秒
31.
In many Western science systems, funding structures increasingly stimulate academic research to contribute to practical applications,
but at the same time the rise of bibliometric performance assessments have strengthened the pressure on academics to conduct
excellent basic research that can be published in scholarly literature. We analyze the interplay between these two developments
in a set of three case studies of fields of chemistry in the Netherlands. First, we describe how the conditions under which
academic chemists work have changed since 1975. Second, we investigate whether practical applications have become a source
of credibility for individual researchers. Indeed, this turns out to be the case in catalysis, where connecting with industrial
applications helps in many steps of the credibility cycle. Practical applications yield much less credibility in environmental
chemistry, where application-oriented research agendas help to acquire funding, but not to publish prestigious papers or to
earn peer recognition. In biochemistry practical applications hardly help in gaining credibility, as this field is still strongly
oriented at fundamental questions. The differences between the fields can be explained by the presence or absence of powerful
upstream end-users, who can afford to invest in academic research with promising long term benefits. 相似文献
32.
Virology Experts in the Boundary Zone Between Science,Policy and the Public: A Biographical Analysis
Erwin van Rijswoud 《Minerva》2010,48(2):145-167
This article aims to open up the biographical black box of three experts working in the boundary zone between science, policy
and public debate. A biographical-narrative approach is used to analyse the roles played by the virologists Albert Osterhaus,
Roel Coutinho and Jaap Goudsmit in policy and public debate. These figures were among the few leading virologists visibly
active in the Netherlands during the revival of infectious diseases in the 1980s. Osterhaus and Coutinho in particular are
still the key figures today, as demonstrated during the outbreak of novel influenza A (H1N1). This article studies the various
political and communicative challenges and dilemmas encountered by these three virologists, and discusses the way in which,
strategically or not, they handled those challenges and dilemmas during the various stages of the field’s recent history.
Important in this respect is their pursuit of a public role that is both effective and credible. We will conclude with a reflection
on the H1N1 pandemic, and the historical and biographical ties between emerging governance arrangements and the experts involved
in the development of such arrangements. 相似文献
33.
Dylan J.H.A. Henssen Loes van den Heuvel Guido De Jong Marc A.T.M. Vorstenbosch Anne-Marie van Cappellen van Walsum Marianne M. Van den Hurk Jan G.M. Kooloos Ronald H.M.A. Bartels 《Anatomical sciences education》2020,13(3):353-365
Neuroanatomy education is a challenging field which could benefit from modern innovations, such as augmented reality (AR) applications. This study investigates the differences on test scores, cognitive load, and motivation after neuroanatomy learning using AR applications or using cross-sections of the brain. Prior to two practical assignments, a pretest (extended matching questions, double-choice questions and a test on cross-sectional anatomy) and a mental rotation test (MRT) were completed. Sex and MRT scores were used to stratify students over the two groups. The two practical assignments were designed to study (1) general brain anatomy and (2) subcortical structures. Subsequently, participants completed a posttest similar to the pretest and a motivational questionnaire. Finally, a focus group interview was conducted to appraise participants’ perceptions. Medical and biomedical students (n = 31); 19 males (61.3%) and 12 females (38.7%), mean age 19.2 ± 1.7 years participated in this experiment. Students who worked with cross-sections (n = 16) showed significantly more improvement on test scores than students who worked with GreyMapp-AR (P = 0.035) (n = 15). Further analysis showed that this difference was primarily caused by significant improvement on the cross-sectional questions. Students in the cross-section group, moreover, experienced a significantly higher germane (P = 0.009) and extraneous cognitive load (P = 0.016) than students in the GreyMapp-AR group. No significant differences were found in motivational scores. To conclude, this study suggests that AR applications can play a role in future anatomy education as an add-on educational tool, especially in learning three-dimensional relations of anatomical structures. 相似文献
34.
Abstract Rowers sit on a seat that slides relative to the boat/ergometer. If a rower lifts him or herself from this sliding seat at any time, the seat will move away from under them and the rowing action is disrupted. From a mechanical perspective, it is clear that the need for the rower to remain in contact with the sliding seat at all times imposes position-dependent constraints on the forces exerted at the oar handle and the footstretcher. Here we investigate if the mechanical power output during rowing, which is strongly related to these forces, might be improved if the contact with the sliding seat was of no concern to the rower. In particular, we examine if elimination of these constraints by strapping the rower to the sliding seat leads to an increase in performance during the start on a standard rowing ergometer. Eleven well-trained female rowers performed 5-stroke starts in normal and strapped conditions. Handle force, vertical seat force, footstretcher force, and handle kinematics were recorded, from which mechanical power and work output were calculated. Most of the relevant mechanical variables differed significantly between the normal and strapped conditions. Most importantly, mechanical power output (averaged over the 5-stroke start) in the strapped condition was 12% higher than in the normal condition. We conclude that strapping a rower's pelvis to the sliding seat allows more vigorous execution of the stroke phases, resulting in a substantial improvement in performance during the start of ergometer rowing. 相似文献
35.
Luce C. A. Claessens Jan van Tartwijk Anna C. van der Want Helena J. M. Pennings Nico Verloop Perry J. den Brok 《The Journal of educational research》2017,110(5):478-493
The authors voice teachers' perceptions of their interpersonal experiences with students in both positive and problematic relationships. Interview data from 28 teachers were examined by coding utterances on teacher and student interactions. Results indicate that teachers defined the quality of the relationship mostly by the level of communion (friendly vs. hostile), instead of by the level of agency (in control vs. powerless). Analyses of mentioned teacher and student behavior show a friendly interactional pattern for positive relationships and a hostile pattern for problematic ones. In teachers' perceptions, positive and problematic relationships also differed in context where encounters take place and topic of talk. Contrary to interactions in problematic relationships, encounters in positive relationships were mostly situated outside the classroom context and conversations during these encounters covered a wide range of topics. Implications for teacher education programs are discussed. 相似文献
36.
Emily H. van Zee 《Cultural Studies of Science Education》2009,4(4):847-854
In this commentary, I first consider what Oliveira defines inquiry-based science instruction to be. Next I discuss what the
discourse practices are that he is advocating. Then I examine what he presents as evidence of changes in two teachers’ discourse
practices due to a summer institute and how their pragmatic awareness seems to have been enhanced through institute activities.
Finally I ponder whether, when, how, and why professional development should include a focus on ways of speaking during inquiry-based
science instruction. 相似文献
37.
Theo van der Zee 《British Journal of Religious Education》2012,34(1):21-34
While the present individualistic and religio-culturally pluralistic scene requires RE teachers to re-evaluate their educational orientation, research shows that they find it difficult. How do RE teachers carry out their task when dealing with an individualistic, pluralistic population? It is argued that communication in the RE classroom is not only about learning to understand the other, but also about learning to relate to larger contexts like the community or society. Such an approach calls for a particular kind of communication to be effective. Teachers could make their communication regarding larger contexts more effective by inspiring students. Inspiration refers to the stimulating influence that teachers have on students. A study was designed to establish whether teachers are in fact credited with an inspiring influence, and whether certain effects ascribed to students are the result of teachers’ inspiring influence. The research permits certain conclusions that are pertinent to teachers’ inspiration as a positive influence on students. Inspiring teachers are credited with such qualities as proficiency in their subject, the ability to motivate students to achieve, devoting special attention to weaker students and finally with demonstrating the meaning of things. The study also shows that the teacher’s inspiring influence is regarded to help students to develop social virtues, knowledge and insight as well as spirituality and a sense of transcendence. Thirdly, qualities ascribed to teachers significantly influence the virtues attributed to students, while the various parties’ cultural, social or religious background has limited influence. Remarkably, imparting the meaning of things is a key factor in explaining the inspiration emanating from teachers. Findings are discussed with a view to RE teachers. It is recommended that RE teachers explicitly demonstrate how their actions convey meaning, whether these entail teaching, modelling, feedback or whatever. They should not only communicate with students by questioning aspects such as otherness and sameness, but also by asking whether things are meaningful: ‘What is this good for?’ 相似文献
38.
Pasha-Zaidi Nausheen Afari Ernest Sevi Barış Urganci Betul Durham Justin 《Learning Environments Research》2019,22(1):83-100
Learning Environments Research - The present study explored the relationship between grit, motivational beliefs and self-regulation among undergraduate students in the United States, the United... 相似文献
39.
A randomized controlled trial of a home-visiting intervention aimed at preventing relationship problems in depressed mothers and their infants 总被引:1,自引:0,他引:1
This study examined the effect of a mother–baby intervention on the quality of mother–child interaction, infant–mother attachment security, and infant socioemotional functioning in a group of depressed mothers with infants aged 1–12 months. A randomized controlled trial compared an experimental group ( n = 35) receiving the intervention (8–10 home visits) with a control group ( n = 36) receiving parenting support by telephone. There were assessments pre, post, and follow-up after 6 months. The intervention had positive effects on the quality of mother–infant interaction. Infants in the experimental group had higher scores for attachment security and for one aspect of socioemotional functioning, namely, competence. The intervention proved successful in preventing deterioration of the quality of mother–child interaction. 相似文献
40.
An important purpose of internships in teacher preparation programmes is to develop competence through experience. The research questions in the present study concern student teachers’ interpersonal profiles (i.e. patterns of their interpersonal behaviour as perceived by students) and the accuracy of their self-belief regarding the interpersonal relationship with students at the beginning and end of the internship. Participants were student teachers (n=34) of a one-year teacher education programme. There were fewer student teachers with preferable interpersonal profiles at the end of the internship than in the beginning. Self-beliefs at the beginning indicated that the majority of student teachers were underestimating themselves; at the end of the internship most of them were overestimating themselves. About two-thirds had more accurate self-beliefs at the end of the internship than at the beginning. Overestimating oneself seemed negatively related to more accurate self-beliefs at the end of the internship and student teachers with more preferable profiles had more accurate self-beliefs. 相似文献