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   9257篇
  免费   115篇
  国内免费   6篇
教育   6180篇
科学研究   1092篇
各国文化   323篇
体育   714篇
综合类   4篇
文化理论   63篇
信息传播   1002篇
  2021年   85篇
  2020年   121篇
  2019年   171篇
  2018年   214篇
  2017年   240篇
  2016年   215篇
  2015年   144篇
  2014年   182篇
  2013年   1619篇
  2012年   189篇
  2011年   193篇
  2010年   170篇
  2009年   176篇
  2008年   229篇
  2007年   210篇
  2006年   176篇
  2005年   165篇
  2004年   180篇
  2003年   122篇
  2002年   112篇
  2001年   152篇
  2000年   181篇
  1999年   157篇
  1998年   86篇
  1997年   84篇
  1996年   76篇
  1994年   67篇
  1993年   81篇
  1992年   137篇
  1991年   148篇
  1990年   148篇
  1989年   156篇
  1988年   121篇
  1987年   118篇
  1986年   117篇
  1985年   157篇
  1984年   127篇
  1983年   119篇
  1982年   99篇
  1981年   81篇
  1980年   91篇
  1979年   142篇
  1978年   91篇
  1977年   90篇
  1976年   78篇
  1975年   78篇
  1974年   89篇
  1973年   80篇
  1971年   74篇
  1968年   74篇
排序方式: 共有9378条查询结果,搜索用时 15 毫秒
951.
OBJECTIVE: To determine whether there is an age-specific incidence of hospitalized cases of Shaken Baby Syndrome (SBS) that has similar properties to the previously reported "normal crying curve," as a form of indirect evidence that crying is an important stimulus for SBS. DESIGN AND SETTING: The study analyzed cases of Shaken Baby Syndrome by age at hospitalization from hospital discharge data for California hospitals from October 1996 through December 2000. PATIENTS: All cases of children less than 18 months (78 weeks) of age for whom the diagnostic code for Shaken Baby Syndrome (995.55) in the International Classification of Disease, Ninth Edition, Clinical Modification was assigned. RESULTS: There were 273 hospitalizations for SBS. Like the "normal crying curve," the curve of age-specific incidence starts at 2-3 weeks, has a clear peak, and declines to baseline by about 36 weeks of age. In contrast to the normal crying curve that peaks at 5-6 weeks, the peak of SBS hospitalizations occurs at 10-13 weeks. CONCLUSIONS: The age-specific incidence curve of hospitalized SBS cases has a similar starting point and shape to the previously reported normal crying curve but the peak occurs about 4-6 weeks later. Of the likely predisposing causes, this pattern is only consistent with the properties of early crying. There are numerous explanations for the lag in the peaks between crying and SBS hospitalizations, including the possibility of repeat shakings prior to hospitalization. The importance of crying as a stimulus to SBS may provide an opportunity for preventive intervention.  相似文献   
952.
OBJECTIVE: Women with histories of childhood maltreatment (CM) have higher rates of physical health problems and greater medical utilization compared to women without abuse histories. This study examined whether current post-traumatic stress disorder (PTSD) symptoms mediate the relationship between CM and indicators of physical health and medical utilization in female veterans. METHOD: Respondents were 221 female veterans (56% of the potential sample), who received medical care from the San Diego VA Healthcare System during a 12-month period. Respondents provided self-report information about CM, PTSD symptoms, use of pain medication, and physical symptoms and functioning. Additional information about medical utilization was extracted from respondents' medical charts. Regression-based models were conducted to test whether PTSD symptoms mediate the relationships between CM and physical symptoms and between CM and medical utilization. RESULTS: Emotional abuse was associated with poorer role-physical functioning, increased bodily pain and greater odds of using pain medication in the past 6 months. Physical abuse was associated with poorer general health. Contrary to prediction, emotional neglect was associated with better role-physical functioning, and CM was not associated with increased healthcare utilization. PTSD was shown to mediate the relationship between emotional and physical abuse and health outcomes. CONCLUSIONS: PTSD, or psychopathology more generally, appears to be an important factor in the negative health impact of CM. Given that several empirically supported interventions are available for PTSD, there may be physical health benefits in early identification and treatment of psychopathology related to CM.  相似文献   
953.
954.

Objectives:

Through interviews with the National Library of Medicine''s MedlinePlus Go Local collaborators, an evaluation team sought to identify process characteristics that are critical for long-term sustainability of Go Local projects and to describe the impact that Go Local projects have on sponsoring institutions.

Methods:

Go Local project coordinators (n = 44) at 31 sponsor institutions participated in semi-structured interviews about their experiences developing and maintaining Go Local sites. Interviews were summarized, checked for accuracy by the participating librarians, and analyzed using a general inductive methodology.

Results:

Institutional factors that support Go Local projects were identified through the interviews, as well as strategies for staffing and partnerships with external organizations. Positive outcomes for sponsoring institutions also were identified.

Conclusions:

The findings may influence the National Library of Medicine team''s decisions about improvements to its Go Local system and the support it provides to sponsoring institutions. The findings may benefit current sponsoring institutions as well as those considering or planning a Go Local project.

Highlights

  • Many project coordinators said they underestimated the level of work their National Library of Medicine (NLM) MedlinePlus Go Local projects would require, but most expressed dedication to the project and optimism about project sustainability.
  • An institutional record of community service or outreach and a director who was supportive of the project were important factors in the progress and sustainability of Go Local projects.
  • Go Local projects brought recognition to some sponsoring institutions from their parent institutions or their communities and provided opportunities to establish better relations with other libraries and institutions.
  • Go Local projects ran more smoothly when a person, even a temporary hire, with dedicated time for the project was in charge during the initial building phase. Volunteer assistance has been difficult to motivate and sustain.

Implications

  • NLM''s Go Local proposal guidelines accurately identify the factors that institutions should pay close attention to when planning a Go Local project.
  • NLM should emphasize continuity plans to address project coordinator turnover.
  • NLM should develop a more formal orientation plan for new project coordinators to assist program continuity at the sponsoring institutions.
  相似文献   
955.
The main purpose of the paper is to find out the provision of providing Networked Services (NSs) among National Institute of Technology (NIT) libraries in India. Methodology used for collecting data was questionnaire. The survey findings indicate that the majority of libraries prefer to provide communication network services (telephone, Internet, e-mail, facsimile etc), online journals (90%), automated catalog system (85%), multimedia databases (85%) and support (70%) services rather than the other services. Concerning the zone wise performance, south zone (80%) libraries are more potential than the other zone libraries in providing NSs.  相似文献   
956.
Many factors go into the decision of selecting a university, ranging from the overall costs and the programme of study to the institute’s reputation; however, accommodation while at university and proximity of the university to one’s permanent abode also play important roles in this decision-making process. Thus, first-year students experience different stages of separation from their prior networks depending on their individual situations. The results of this Ontario (Canada) 2012 study add to prior research by indicating that separation of students’ living arrangements and distance from home impact on transition and incorporation variables, which influenced students’ adaptation to university.  相似文献   
957.
Higher education institutions are facing major challenges requiring traditional leadership and administrative policies and practices to be rethought and renewed. These challenges concern the whole academic community but mostly the institutions’ administrative leaders. This article suggests how applying the democratic principles of “inclusion”, which stresses critical dialogue and social justice, can reach beyond the traditional managerial and administrative policies when meeting the new requirements; and be a catalyst for change in leadership practices.  相似文献   
958.
Mentoring programmes have gained increasing popularity in institutions of higher education to support undergraduates in community service or outreach efforts. Many of these programmes partner mentors with inner‐city youth, providing assistance in underserved communities while mentors gain experiences that connect theory and practice. Here we report on two years of fieldwork in a Community Technology Centre that created mentoring partnerships in which 36 liberal arts undergraduates engaged with local youth to design, create, and build technology projects involving graphics, video, music, and animation. We analysed over 200 field notes, which described their mentoring interactions over eight weeks and conducted exit interviews about their mentoring experiences. Our results indicate that mentors participated not just as more knowledgeable peers but also as facilitators, advisors, observers and, most importantly, as learners in this process. In the interviews, nearly all mentors reviewed assumptions about their own learning and mentoring, in addition to reflections about social issues. We discuss the importance of these findings for conceptualising mentoring as a partnership by creating more equitable interactions in service learning initiatives. We also address the role of constructionist activities in facilitating learning opportunities for both mentors and mentees.  相似文献   
959.

This qualitative study examined the impact of mentoring relationships upon preservice and inservice teachers' literacy instruction. Twenty-two undergraduate students seeking teacher certification were assigned in pairs to tutor primary school students in a university reading clinic. Eleven classroom teachers seeking reading specialist certification conducted ten mentoring sessions with each pair of preservice teachers. Purposeful sampling was used to select three of the mentoring teams for data analysis. In two out of three teams, results indicated that preservice teachers expanded their instructional strategies as a result of three components of the mentoring relationship: selection of strategies, organization, and non-judgmental support. All inservice teachers reported increased reflection on and adaptation to their instructional strategies. Findings support the conclusion that early mentoring experiences foster growth for both preservice and inservice teachers.  相似文献   
960.

While educational leadership and management has experienced impressive development over the last three decades the fact that a robust comparative branch of the field has failed to emerge is equally conspicuous. This article builds a case for comparative and international educational leadership and management, arguing that the development of conceptual frameworks and instrumentation are imperative if the field is to keep abreast of globalisation of policy and practice. Accordingly, a conceptual framework is described and justified based on a cultural and cross-cultural approach focusing on the school level as the baseline unit for analysis. Specifically, the proposed framework is architectured around the interrelationship between two levels of culture, societal and organisational, and four elements comprising schooling and school-based management, namely, organisational structures, leadership and management processes, curriculum, and teaching and learning. Finally, limitations and implications of the model are discussed, including the need for the framework to be operationalised by developing appropriate research instruments.  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