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   154篇
  免费   8篇
各国政治   3篇
工人农民   16篇
世界政治   14篇
外交国际关系   16篇
法律   56篇
政治理论   57篇
  2023年   4篇
  2022年   1篇
  2021年   5篇
  2020年   9篇
  2019年   3篇
  2018年   8篇
  2017年   9篇
  2016年   4篇
  2015年   2篇
  2014年   5篇
  2013年   27篇
  2012年   3篇
  2011年   2篇
  2010年   3篇
  2009年   6篇
  2008年   5篇
  2007年   9篇
  2006年   6篇
  2005年   1篇
  2004年   3篇
  2003年   2篇
  2002年   1篇
  2001年   3篇
  2000年   2篇
  1999年   1篇
  1998年   3篇
  1997年   2篇
  1996年   2篇
  1995年   3篇
  1994年   2篇
  1993年   1篇
  1991年   1篇
  1990年   2篇
  1988年   5篇
  1987年   2篇
  1986年   2篇
  1985年   1篇
  1984年   1篇
  1983年   1篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1978年   1篇
  1977年   1篇
  1973年   2篇
  1970年   1篇
  1968年   1篇
排序方式: 共有162条查询结果,搜索用时 31 毫秒
11.
Adolescence terminable and interminable: When does adolescence end?   总被引:3,自引:0,他引:3  
The question of when adolescence ends and young adulthood begins is considered. Throughout, it is addressed in terms of the theory of broad and narrow socialization, which emphasizes the cultural context of development. The question is approached from cognitive, emotional, and behavioral perspectives, then from the perspective of role transitions (such as marriage and parenthood). The idea of an extended path from adolescence to adulthood is discussed, and the concept of emerging adulthood is presented. It is suggested that in most non-Western cultures the entrance to adulthood is socially defined and marked by a social event, usually marriage. In the contemporary West, however, where there is a strong emphasis on independence and individualism, the entrance to adulthood is defined and marked individually. Consequently, it is likely to be based on the achievement of residential and financial independence as well as on the attainment of cognitive self-sufficiency, emotional self-reliance, and behavioral self-control. Thus in the contemporary West the passage from adolescence to young adulthood is a process that is gradual and may take many years.This research was funded partly by an institutional training grant from the National Institute of Mental Health 5T32 MH14668-14, for the Clinical Research Training Program in Adolescence, jointly sponsored by the Department of Psychiatry at Northwestern University and the Committee on Human Development at the University of Chicago.Received Ph.D. from University of Virginia, Research interests include adolescent reckless behavior, adolescents' uses of media, and the transition to adulthood.Research interests include the transition to adulthood and development in young adulthood.  相似文献   
12.
13.
There are a number of forensic cases in which the identification of the epithelial cell type from which DNA originated would provide important probative evidence. This study aimed to develop a technique using histological staining of fixed cells to distinguish between skin, buccal and vaginal epithelium. First, 11 different stains were screened on formalin-fixed, wax-embedded cells from five women. Samples were analysed qualitatively by examining staining patterns (colour) and morphology (absence or presence of nuclei). Three of the staining methods – Dane's, Csaba's and Ayoub-Shklar – were successful in distinguishing skin epithelial cells from buccal and vaginal. Second, cells were smeared directly onto slides, fixed with one of five fixatives and stained with one of the three stains mentioned above. Methanol fixation, coupled with the Dane's staining method, specific to keratin, was the only technique that distinguished between all three cell types. Skin cells stained magenta, red and orange and lacked nuclei; buccal cells stained predominantly orange–pink with red nuclei; while vaginal cells stained bright orange with orange nuclei and a blue extracellular hue. This staining pattern in vaginal cells was consistent in samples collected from 50 women aged between 18 and 67. Identification of cell type from unlabelled micrographs by 10 trained observers showed a mean success rate of 95%. The results of this study demonstrate that histological staining may provide forensic scientists with a technique for distinguishing between skin, buccal and vaginal epithelial cells and thus would enable more conclusive analyses when investigating sexual assault cases.  相似文献   
14.
The Job Training Partnership Act (JTPA), passed by Congress in 1982, is significant federal employment and training legislation for a number of reasons. Most noticeably, it substantially enhanced private sector and state government roles in the administration of such programs. In order to understand both the programmatic impact of JTPA and its likely consequences on subsequent federal employment and training initiatives, it is necessary to look at the politics of the legislation-especially those interests that are strongly represented through its implementation and those that are not. By doing this, one obtains a better sense of the dimensions of conflict around future employment and training legislation. General guidelines within which Congress should act in subsequent legislative activity are laid out.  相似文献   
15.
16.
Public Administration research in Denmark has a relatively short history. It was first initiated in the 1970s and was developed from public law. However, from an initial homogeneity it has become increasingly pluralistic in its approach due to three factors: a strong orientation towards the study of institutional reform in the public sector, inspiration from the international literature and the specific institutional set up of the academic community that divides it into separate schools. It is possible to distinguish three trends in today's Danish Public Administration research. These trends are inspired by historical institutionalism, rational choice institutionalism and sociological institutionalism, respectively. What is needed in the future is an increased dialogue between these trends. The purpose of the dialogue should not be to reach for a new homogeneity but to increase the critical debate among different schools in order to increase the general quality of public administration research in Denmark.  相似文献   
17.
Untreated traumatic rupture of the aorta generally results in sudden death. A case with 14 years' survival after an unrecognized traumatic rupture of the aorta is presented. Chronic traumatic aneurysm of the aorta should be kept in mind in a patient who develops sudden symptoms of arteriosclerotic heart disease months to years after a relevant thoracic trauma.  相似文献   
18.
Allele frequencies for 15 short tandem repeats (STRs) autosomal loci (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, vWA, TPOX, D18S51, D5S818 and FGA, included in the AmpFLSTR Identifiler, Applied Biosystems) were studied in the city of Maracaibo, Venezuela and were compared with other published Latin-American populations for the same loci. Population and forensic parameters were estimated.  相似文献   
19.
Several recent studies show European university scientists contributing far more frequently to company-owned patented inventions than they do to patents owned by universities or by the academic scientists themselves. Recognising the significance of this channel for direct commercialisation of European academic research makes it important to understand its response to current Bayh-Dole inspired reforms of university patenting rights. This paper studies the contribution from university scientists to inventions patented by dedicated biotech firms (DBFs) specialised in drug discovery in Denmark and Sweden, which in this respect share a number of structural and historic characteristics. It examines effects of the Danish Law on University Patenting (LUP) effective January 2000, which transferred to the employer university rights to patents on inventions made by Danish university scientists alone or as participants in collaborative research with industry. Sweden so far has left property rights with academic scientists, as they also were in Denmark prior to the reform. Consequently, comparison of Danish and Swedish research collaboration before and after LUP offers a quasi-controlled experiment, bringing out effects on joint research of university IPR reform. In original data on all 3,640 inventor contributions behind the 1,087 patents filed by Danish and Swedish DBFs 1990–2004, Difference-in-Difference regressions uncover notable LUP-induced effects in the form of significant reductions in contributions from Danish domestic academic inventors, combined with a simultaneous substitutive increase of non-Danish academic inventors. A moderate increase in academic inventions channelled into university owned-patents does appear after LUP. But the larger part of the inventive potential of academia, previously mobilised into company-owned patents, seems to have been rendered inactive as a result of the reform. As a likely explanation of these effects the paper suggests that exploratory research, the typical target of joint university-DBF projects in drug discovery, fits poorly into LUP’s requirement for ex ante allocation of IPR. The Pre-LUP convention of IPR allocated to the industrial partner in return for research funding and publication rights to the academic partner may have offered more effective contracting for this type of research. There are indications that LUP, outside the exploratory agenda of drug discovery, offers a more productive framework for inventions requiring less complicated and uncertain post-discovery R&D.
Finn ValentinEmail:
  相似文献   
20.
Abstract: Very little genetic data exist on Haitians, an estimated 1.2 million of whom, not including illegal immigrants, reside in the United States. The absence of genetic data on a population of this size reduces the discriminatory power of criminal and missing‐person DNA databases in the United States and Caribbean. We present a forensic population study that provides the first genetic data set for Haiti. This study uses hypervariable segment one (HVS‐1) mitochondrial DNA (mtDNA) nucleotide sequences from 291 subjects primarily from rural areas of northern and southern Haiti, where admixture would be minimal. Our results showed that the African maternal genetic component of Haitians had slightly higher West‐Central African admixture than African‐Americans and Dominicans, but considerably less than Afro‐Brazilians. These results lay the foundation for further forensic genetics studies in the Haitian population and serve as a model for forensic mtDNA identification of individuals in other isolated or rural communities.  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