全文获取类型
收费全文 | 529篇 |
免费 | 23篇 |
专业分类
各国政治 | 31篇 |
工人农民 | 71篇 |
世界政治 | 57篇 |
外交国际关系 | 23篇 |
法律 | 268篇 |
中国政治 | 7篇 |
政治理论 | 90篇 |
综合类 | 5篇 |
出版年
2023年 | 3篇 |
2022年 | 2篇 |
2021年 | 6篇 |
2020年 | 8篇 |
2019年 | 10篇 |
2018年 | 29篇 |
2017年 | 27篇 |
2016年 | 32篇 |
2015年 | 19篇 |
2014年 | 16篇 |
2013年 | 88篇 |
2012年 | 19篇 |
2011年 | 18篇 |
2010年 | 21篇 |
2009年 | 17篇 |
2008年 | 24篇 |
2007年 | 27篇 |
2006年 | 25篇 |
2005年 | 16篇 |
2004年 | 30篇 |
2003年 | 19篇 |
2002年 | 19篇 |
2001年 | 3篇 |
2000年 | 5篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 4篇 |
1996年 | 4篇 |
1995年 | 8篇 |
1994年 | 4篇 |
1993年 | 8篇 |
1992年 | 7篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 4篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1976年 | 1篇 |
1973年 | 2篇 |
排序方式: 共有552条查询结果,搜索用时 0 毫秒
501.
502.
503.
504.
ABSTRACTThis article aims to provide an overview of the primary trends and developments of the domestic private security industry in select countries in Africa, while also further reflecting on a selection of operational challenges and obstacles inherent to the industry and its regulation. In particular, field research was conducted in Uganda to explore the nature of the state ownership of private security companies so as to further highlight the regulatory difficulties. Our findings raise a number of questions pertaining to the theorising of private security regulation answers of which, we conclude, may find utility in drawing on the concept of “hybridity” as an alternative heuristic tool to engage with the realities of state regulation in the Global South. 相似文献
505.
506.
Research Summary Attention to gang issues has dramatically increased in the last several decades, both in the scholarly literature and in law enforcement. Despite widespread attention to the gang problem, researchers, police officers, and lawmakers have yet to agree on definitions used to characterize and understand the problem. This article summarizes the existing literature concerning the importance of accurately defining and classifying gang members, documents and analyzes state and federal gang legislation in the United States, and provides a detailed analysis of one state's system that might serve as a useful model for other states. Policy Implications Serious risks to public safety and civil liberties are associated with Type 1 and Type 2 classification errors regarding gang membership. The wide variation in state statutory definitions of “gang member” and in the construction and administration of gang databases presents major challenges for policymakers and academic researchers. This article addresses these challenges and argues that a more rigorous and unified system, based on one state's existing model, might be possible and could offer significant advantages in our efforts to address the delinquent and criminal behavior of gangs throughout the United States. 相似文献
507.
Effect of Sterilants on Amplification and Detection of Target DNA from Bacillus cereus Spores 下载免费PDF全文
James M. Robertson Ph.D. Douglas L. Anders Ph.D. Francene Basalyga M.D. Julie Millar M.F.S. Donia Palomo Slack M.S. Robert Bever Ph.D. 《Journal of forensic sciences》2018,63(3):699-707
To conceal criminal activity of a bioterrorist or agroterrorist, the site of pathogen generation is often treated with sterilants to kill the organisms and remove evidence. As dead organisms cannot be analyzed by culture, this study examined whether DNA from sterilant‐treated Bacillus cereus spores was viable for amplification. The spores were exposed to five common sterilants: bleach, Sterilox®, oxidizer foam (L‐Gel), a peroxyacid (Actril®), and formaldehyde vapor. The spores were inoculated on typical surfaces found in offices and laboratories to test for environmental effects. It was found that the surface influenced the efficiency of recovery of the organisms. The DNA isolated from the recovered spores was successfully detected using RT‐qPCR for all treatments except for formaldehyde, by amplifying the phosphatidylinositol phospholipase C and sphingomyelinase genes. The results demonstrated that evidence from sites treated with sterilants can still provide information on the uncultured organism, using DNA amplification. 相似文献
508.
509.
Angela M. Kaufman-Parks Alfred DeMaris Peggy C. Giordano Wendy D. Manning Monica A. Longmore 《Journal of family violence》2018,33(1):27-41
Prior empirical research on intimate partner violence (IPV) in adolescence and young adulthood often focuses on exposure to violence in the family-of-origin using retrospective and cross-sectional data. Yet individuals’ families matter beyond simply the presence or absence of abuse, and these effects may vary across time. To address these issues, the present study employed five waves of longitudinal data from the Toledo Adolescent Relationships Study (TARS) to investigate the trajectory of IPV from adolescence to young adulthood (N = 950 respondents, 4,750 person-periods) with a specific focus on how familial factors continue to matter across the life course. Results indicated that family-of-origin violence and parent-child relationship quality were independent predictors of IPV. The effect of parent-child relationship quality on IPV also became greater as individuals aged. These results have implications for policies targeted at reducing IPV. 相似文献
510.
The present study tested the Two-Judgment Theory of Eyewitness Identification Accuracy. Specifically, the extent to which participants were able to engage in an absolute judgment strategy was manipulated by varying the time available to view a lineup. Providing a limited exposure to a lineup should “interrupt” decision making, whereby witnesses can only engage a relative strategy, thus leading to higher false positive responding given a target-absent lineup. Seventy-four adults viewed a 1-minute video that exposed them to an unknown target and subsequently viewed the lineup for a limited (2 s) or an unlimited amount of time. Although false positive rates were similar across conditions, accurate witnesses were more confident than inaccurate witnesses. Confidence was negatively correlated with response latency such that witnesses who took more time to make a decision were less confident in their decisions compared to witnesses who made more rapid decisions. Response latency did not differ for accurate and inaccurate witnesses. Limitations and suggestions for future research on the Two-Judgment Theory are discussed. 相似文献