全文获取类型
收费全文 | 954篇 |
免费 | 52篇 |
专业分类
各国政治 | 37篇 |
工人农民 | 60篇 |
世界政治 | 70篇 |
外交国际关系 | 55篇 |
法律 | 487篇 |
中国政治 | 15篇 |
政治理论 | 272篇 |
综合类 | 10篇 |
出版年
2023年 | 11篇 |
2022年 | 6篇 |
2021年 | 14篇 |
2020年 | 33篇 |
2019年 | 23篇 |
2018年 | 37篇 |
2017年 | 42篇 |
2016年 | 50篇 |
2015年 | 35篇 |
2014年 | 43篇 |
2013年 | 134篇 |
2012年 | 35篇 |
2011年 | 23篇 |
2010年 | 30篇 |
2009年 | 43篇 |
2008年 | 37篇 |
2007年 | 53篇 |
2006年 | 36篇 |
2005年 | 43篇 |
2004年 | 24篇 |
2003年 | 35篇 |
2002年 | 23篇 |
2001年 | 17篇 |
2000年 | 17篇 |
1999年 | 13篇 |
1998年 | 15篇 |
1997年 | 9篇 |
1996年 | 7篇 |
1995年 | 10篇 |
1994年 | 8篇 |
1993年 | 6篇 |
1992年 | 10篇 |
1991年 | 5篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1988年 | 9篇 |
1986年 | 5篇 |
1985年 | 5篇 |
1984年 | 4篇 |
1983年 | 2篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 2篇 |
1979年 | 6篇 |
1978年 | 2篇 |
1977年 | 7篇 |
1976年 | 2篇 |
1975年 | 2篇 |
1970年 | 3篇 |
1968年 | 2篇 |
排序方式: 共有1006条查询结果,搜索用时 15 毫秒
751.
752.
The Journal of Technology Transfer - Foreign-born academic scientists have been consistently shown to be more productive than the native-born in the United States with regard to research and... 相似文献
753.
Youth involvement in crime has declined substantially over the past few decades, yet the reasons for this trend remain unclear. We advance the literature by examining the role of several potentially important shifts in individual attitudes and behaviors that may help to account for the observed temporal variation in youth delinquency. Our multilevel analysis of repeated cross‐sectional data from eighth and tenth grade students in the Monitoring the Future (MTF) study indicates that changes in youth offending prevalence were not associated with changes in youth attachment and commitment to school, community involvement, or parental supervision after school. In contrast, the study provides suggestive evidence that the significant reduction in youth offending prevalence observed since the early 1990s was significantly associated with a decrease in unstructured socializing and alcohol consumption and, to a lesser extent, with a decrease in youth preferences for risky activities. Implications for existing theoretical explanations and future research on youth crime trends are discussed. 相似文献
754.
755.
Eric Lesneskie 《Journal of school violence》2017,16(4):426-444
This study utilizes the School Survey on Crime and Safety to identify variables that predict lower levels of violence from four domains: school security, school climate, parental involvement, and community involvement. Negative binomial regression was performed and the findings indicate that statistically significant results come from all four domains. When modifying the sample to include only schools that offer some form of parental involvement opportunities, schools with greater parental volunteering and participation in subject area events experience reduced levels of violence. Implications from this analysis include developing creative methods for greater parental input in school activities. 相似文献
756.
Popliteal Vein Blood Sampling and the Postmortem Redistribution of Diazepam,Methadone, and Morphine
下载免费PDF全文
![点击此处可从《Journal of forensic sciences》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Eric Lemaire M.D. Carl Schmidt M.D. Raphael Denooz Ph.D. Corinne Charlier Ph.D. Philippe Boxho M.D. Ph.D. 《Journal of forensic sciences》2016,61(4):1017-1028
Postmortem redistribution (PMR) refers to the site‐ and time‐related blood drug concentration variations after death. We compared central blood (cardiac and subclavian) with peripheral blood (femoral and popliteal) concentrations of diazepam, methadone, and morphine. To our knowledge, popliteal blood has never been compared with other sites. Intracardiac blood (ICB), subclavian blood (SB), femoral blood (FB), and popliteal blood (PB) were sampled in 30 cases. To assess PMR, mean concentrations and ratios were compared. Influence of postmortem interval on mean ratios was also assessed. Results show that popliteal mean concentrations were lower than those for other sites for all three drugs, even lower than femoral blood; mean ratios suggested that the popliteal site was less subject to PMR, and estimated postmortem interval did not influence ratios except for diazepam and methadone FB/PB. In conclusion, our study is the first to explore the popliteal site and suggests that popliteal blood is less prone to postmortem redistribution. 相似文献
757.
This study examines how personal research collaboration and advice networks of academic faculty in six fields of science and engineering affect three kinds of satisfaction: satisfaction with rewards; satisfaction with reputation of department and institution; and satisfaction with professional recognition and visibility of research. The study includes determinants found in the literature such as perceived influence on departmental decisions, departmental provision of resources, and perceptions of time spent on service and other controls. Using data collected from a national survey of academic faculty in six fields of science and engineering in Carnegie designated Research I universities, regression models test literature derived hypotheses. Findings show that the effects of network structure and resources on satisfaction depend on the kind of satisfaction studied. Non-network variables demonstrate associations with satisfaction that are generally expected from the literature. The paper provides evidence of the critical role that personal research collaboration and advice networks play for scientists’ satisfaction. It also raises important questions about the complex relationships between network structures and resources, and satisfaction. Conclusions present implications for university and departmental administrators. 相似文献
758.
Eric L. Piza Andrew M. Gilchrist Joel M. Caplan Leslie W. Kennedy Brian A. O’Hara 《Journal of Experimental Criminology》2016,12(3):403-429
Objectives
This study presents a cost–benefit analysis of an intervention pairing proactive CCTV monitoring with directed police patrol in Newark, NJ. A recent randomized control trial found that the strategy generated significant crime reductions in treatment areas relative to control areas. The current study focuses on the financial implications of the experimental strategy through a cost–benefit analysis.Methods
The study begins by measuring the costs and benefits associated with the experimental strategy, the findings of which can inform agencies with existing CCTV infrastructure. Follow-up analyses measure the costs and benefits of the intervention for agencies absent existing CCTV infrastructure, meaning a CCTV system would have to be funded in addition to the intervention outputs. Alongside overall benefits, this study presents the tangible cost savings afforded to the Criminal Justice system as well as to each of the separate criminal justice (CJ) system components: Policing, Courts, and Corrections.Results
We found the experimental strategy to be highly cost effective for agencies with existing CCTV infrastructure. However, when the cost of the CCTV system is considered, the strategy is largely cost prohibitive. While the cumulative societal and criminal justice findings suggest some evidence of a modest cost savings, the strategy is highly cost prohibitive for each of the individual CJ system components when CCTV system costs are included.Conclusions
Results suggest that the experimental strategy is a worthwhile investment for agencies with existing CCTV infrastructure. Agencies absent CCTV may want to consider whether funds would be better allocated towards alternate strategies.759.
Jon Kåre Skiple Gunnar Grendstad William R. Shaffer Eric N. Waltenburg 《Scandinavian political studies》2016,39(1):73-94
Supreme Court justices are overlooked, but important, national policy‐making players who render final and consequential decisions in cases on economic conflicts. The research question asks what forces explain the decisional behaviour of Supreme Court justices in economic rights cases between a private and a public party. Theoretically, the decisional behaviour of an individual justice is a function of his or her notion as to what makes ‘good’ law, pursued in a cultural‐collegial setting that is oriented by majoritarian requirements, while constrained by the legal nature of the case being considered. Empirically, all economic decisions made by Norwegian Supreme Court justices in five‐justice panels from 1963 to 2012 are analyzed. Our multilevel model demonstrates that individual, collegial and case‐level forces all contribute to explain the justices’ votes. These results suggest that case‐related dynamics, such as who the plaintiff is or the amount of disagreement between justices, matter, but also that ideology – via appointment mechanisms – matters when a nation's high court justices decide economic cases. Understanding the foundational assumptions and the institutional procedures is vital when transporting judicial behaviour models across polities. 相似文献
760.
For 30 years, U.S. immigration policy has increasingly focused on enforcement. This article goes beyond cataloging the harms of such policies to document the processes by which they become more or less salient in the lives of children of immigrants over time. In-depth interviews with 86 young adults raised in New York show that enforcement policies shape children's lives either through lived experiences of enforcement episodes or through diffuse fears arising from indirect threats. Qualitative analysis of narratives of (a) deportations post-incarceration, (b) removals, (c) arrests and detentions (d) direct threats, and (e) diffuse fears identifies characteristics related to each that may affect children even after they age into adulthood. 相似文献