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   1714篇
  免费   43篇
管理学   131篇
民族学   11篇
人口学   191篇
丛书文集   3篇
理论方法论   235篇
综合类   12篇
社会学   1050篇
统计学   124篇
  2024年   5篇
  2023年   12篇
  2022年   7篇
  2021年   9篇
  2020年   40篇
  2019年   42篇
  2018年   49篇
  2017年   68篇
  2016年   59篇
  2015年   33篇
  2014年   50篇
  2013年   290篇
  2012年   61篇
  2011年   80篇
  2010年   47篇
  2009年   42篇
  2008年   63篇
  2007年   61篇
  2006年   75篇
  2005年   58篇
  2004年   63篇
  2003年   57篇
  2002年   63篇
  2001年   42篇
  2000年   49篇
  1999年   31篇
  1998年   29篇
  1997年   22篇
  1996年   19篇
  1995年   16篇
  1994年   28篇
  1993年   17篇
  1992年   20篇
  1991年   13篇
  1990年   14篇
  1989年   13篇
  1988年   9篇
  1987年   10篇
  1986年   9篇
  1985年   12篇
  1984年   16篇
  1983年   9篇
  1982年   6篇
  1981年   3篇
  1980年   8篇
  1979年   6篇
  1978年   4篇
  1977年   3篇
  1975年   3篇
  1971年   3篇
排序方式: 共有1757条查询结果,搜索用时 15 毫秒
31.
32.
Abstract

Reports on the Ohio Valley Group of Technical Services Librarians (OVGTSL) Annual Conference, the April 2004 New England Technical Services Librarians (NETSL) Conference, the 2004 Acquisitions Institute at Timberline Lodge, and the 2004 Conference of the North American Serials Interest Group (NASIG).

Reports are from four conferences held in various parts of the United States and cover a wide range of topics. The Ohio Valley Group of Technical Services Librarians program emphasized the relationship between technical and public services. Education, both formal and continuing, was the theme for the New England Technical Services Librarians. Timberline Lodge hosted another Acquisitions Institute featuring sessions on new discoveries. The report on the 2004 North American Serials Group Annual Conference allows Conference Student Grant Award winner Chris Brady to include some personal reflections along with summaries of the sessions he attended.  相似文献   
33.
In sequential studies, formal interim analyses are usually restricted to a consideration of a single null hypothesis concerning a single parameter of interest. Valid frequentist methods of hypothesis testing and of point and interval estimation for the primary parameter have already been devised for use at the end of such a study. However, the completed data set may warrant a more detailed analysis, involving the estimation of parameters corresponding to effects that were not used to determine when to stop, and yet correlated with those that were. This paper describes methods for setting confidence intervals for secondary parameters in a way which provides the correct coverage probability in repeated frequentist realizations of the sequential design used. The method assumes that information accumulates on the primary and secondary parameters at proportional rates. This requirement will be valid in many potential applications, but only in limited situations in survival analysis.  相似文献   
34.
Using data from the National Education Longitudinal Study of 1988 and the Education Longitudinal Study of 2002, I compare the academic attitudes of high school students from Generation X and the Millennial Generation. I then analyze the effects these attitudes have on mathematics achievement test scores. Compared to the earlier group, students in the later cohort were less likely to indicate academic reasons for attending school and largely perceived their friends as being less engaged academically. Students in both cohorts whose friends held academic values experienced an increase in math scores. The more students in the earlier cohort disagreed that they came to school for academic reasons, the more their math scores decreased; this relationship did not appear for the later cohort. Females in each cohort showed stronger academic attitudes than males; additionally, believing that popularity was important was associated with lower test scores for females, but not males, in the Millennial cohort.  相似文献   
35.
36.
Provisions of the Adoption and Safe Families Act of 1997 mandated shorter time frames for making permanency decisions and facilitating adoption. Yet for many children, foster care continued to be a significant portion of their life experiences. This project explored the potential permanency option of birthfamilies and extended kin for children who languished in foster care while being free for adoption. Eighteen children achieved permanent placement with their birthfamilies. In addition, staff found that although many families could not provide permanent placements, they could offer appropriate relationships with the children. This project team recommends viewing family relationships as an integral component where placement is one option on a continuum that includes letters, phone calls, and visits.  相似文献   
37.
There is a need to investigate novel interventions that promote worksite physical activity and wellness. OBJECTIVE: The authors' purpose in this study was to evaluate the effectiveness of a 12-week walking program supplemented with a pedometer, computer educational program, and weekly e-mails. METHODS: College faculty and staff participated in a one-group pre-posttest study to determine whether the 12-week walking intervention had an effect on body mass index (BMI), blood pressure, blood glucose, and cholesterol. The authors also determined participant-perceived wellness effects. RESULTS: The authors observed differences between baseline and follow-up in BMI (p = .024), blood glucose (p = .06), and total cholesterol (p = .09). The program had a moderate effect on fitness, mood, health awareness, nutrition, and health. CONCLUSIONS: It is incumbent that experts develop innovative worksite physical activity and wellness programs. A pedometer-monitored walking program is one way that a worksite health initiative can improve the health and wellness of its employees and simultaneously reduce health-care costs.  相似文献   
38.
Making Sense of Organizational Change: Voices of Older Volunteers   总被引:1,自引:1,他引:0  
The role of voluntary and community sector organizations in the delivery of public services is increasing and these changes bring new responsibilities and benefits to organizations that have the capacity to participate. There are concerns within the sector about the implications for citizenship and participation. The sector is highly dependent on volunteers yet little is known about how organizational change in response to new relationships with the statutory sector impact upon the commitment and well-being of people who volunteer. This paper addresses that gap in knowledge for older volunteers. Drawing upon collaborative research with a voluntary organization in the north of England, the authors explore the meanings and aspirations of volunteering for older people, and explain how and why changes associated with closer engagement with public service delivery and less grant dependency can be disempowering for them.
Susan BainesEmail:
  相似文献   
39.
This paper examines factors associated with feeling suicidal in a large sample of urban men in Sydney and Melbourne, aged 18-50, including heterosexual, gay and bisexual men, HIV antibody positive and HIV antibody negative. As in previous research, sexuality (being homosexual or bisexual) was found to be a major predictor of suicidality. The research went some way towards explaining the close relationship between feeling suicidal and sexual orientation. Sexuality interacts with feeling bad in that, once men feel moderately bad/depressed, they are more likely to feel suicidal if they are homosexual or bisexual than if they are heterosexual. In addition, the research found that experience of verbal abuse and physical assault (harassment) increased feeling suicidal for both heterosexual and gay/bisexual men, not just for homosexual men as suggested by previous research, and that social isolation in the form of living alone is a further risk factor. Seeking counseling help and taking sexual risks were also independently associated with feeling suicidal. These actions may result from feeling suicidal rather than the reverse, and their association with feeling suicidal warrants further research. Many of the 46 independent variables examined in the research, including HIV antibody status and closeness to the HIV/ AIDS epidemic, were related to feeling suicidal only through their association with being gay/bisexual. Celibacy and general risk taking were not related to feeling suicidal in this study.  相似文献   
40.
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