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   208篇
  免费   7篇
各国政治   12篇
工人农民   20篇
世界政治   23篇
外交国际关系   8篇
法律   91篇
中国政治   3篇
政治理论   55篇
综合类   3篇
  2024年   1篇
  2023年   1篇
  2022年   4篇
  2021年   4篇
  2020年   8篇
  2019年   11篇
  2018年   14篇
  2017年   9篇
  2016年   9篇
  2015年   9篇
  2014年   12篇
  2013年   24篇
  2011年   5篇
  2010年   1篇
  2009年   7篇
  2008年   8篇
  2007年   7篇
  2006年   7篇
  2005年   7篇
  2004年   8篇
  2003年   7篇
  2002年   3篇
  2001年   4篇
  2000年   4篇
  1999年   4篇
  1998年   5篇
  1997年   8篇
  1996年   2篇
  1995年   1篇
  1994年   1篇
  1993年   1篇
  1992年   1篇
  1991年   1篇
  1990年   3篇
  1989年   1篇
  1987年   3篇
  1986年   1篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1979年   1篇
  1970年   2篇
  1969年   1篇
  1968年   1篇
排序方式: 共有215条查询结果,搜索用时 15 毫秒
151.
Here we argue that sociolegal processes can not only restructure social relationships through setting legal precedent but can also restructure socioenvironmental relationships through setting what we call “environmental precedent.” By environmental precedent we mean the environmental consequences of legal processes, environmental consequences that then become the new, dynamic material reality for future legal processes. We apply the concept of environmental precedent to a legal history of the Chicago River, using this case to illustrate how interactions between sociolegal and environmental processes can set environmental precedent in a way that reshuffles the social and material foundations of future legal processes.  相似文献   
152.
As DNA technology becomes increasingly sensitive, forensic laboratories are receiving more low-template DNA samples. These samples, already low in DNA content, become even more challenging to process as the available DNA becomes further reduced during the extraction step. In this study, two extraction modifications were tested to determine if the cause of DNA loss could be identified and mitigated. A double lysis technique was used to test for DNA loss in the sample collection substrate, and lysate eluates were re-extracted to determine DNA loss from inefficient binding to the silica column. Both modifications showed DNA was lost at these steps. However, resulting STR profiles from these samples had fewer peaks and lower peak heights when compared to samples processed with no extraction modifications. Overall, the potential benefits of adding these extraction modifications for low-template DNA sample processing are not enough to justify the risk associated with additional manipulation.  相似文献   
153.
Having explained their adoption, analysts are now trying to understand how EU environmental policies have subsequently evolved over time. In 2003, David Vogel famously speculated that having overtaken the US in the environmental race to the top, EU policies would also eventually succumb to policy gridlock, that is, neither expanding nor dismantling. Empirical research has since confirmed that EU policy expansion is in decline, but less is known about why dismantling has also been very limited. This article breaks new ground by reconfiguring dismantling—a concept developed for national policy systems—to explain the various dismantling strategies deployed at EU level (1992 to 2016). It finds that the absence of significant dismantling is due both to the symbolic nature of early dismantling attempts and the failure of more recent attempts to build coalitions that overcome institutional obstacles to policy change in the EU.  相似文献   
154.
155.
156.
157.
This Book of the Seton Hall Law Review presents the contributions to Follow-On Biologics: Implementation Challenges and Opportunities, a one-day roundtable event hosted by Seton Hall University School of Law in the fall of 2010. The roundtable fostered an international dialogue regarding the future of follow-on biologics in the United States resulting from the Patient Protection and Affordable Care Act of March 2010. THE BIOLOGIC PRICE COMPETITION AND INNOVATION ACT OF 2010. The March 23, 2010, enactment of the Patient Protection and Affordable Care Act (PPACA) and the companion Health Care and Education Affordability Reconciliation Act of 2010 ushered in landmark reform of the American health care system. Along with sweeping overhauls of the health care system generally, PPACA also provides a new regulatory challenge for the Food and Drug Administration (FDA). A subtitle within PPACA, the Biologics Price Competition and Innovation Act (BPCIA), bestows upon FDA broad authority to implement an abbreviated approval route to market for biological products (also known as biologics) that are "biosimilar" to an existing marketed product. The brief introduction will provide a basic comparison of biologics and conventional pharmaceutical drugs that will prove central to the FDA's development of this follow-on biologic pathway as well as specifically examine the content and scope of the BPCIA provisions and identify future challenges for the FDA. It will conclude by highlighting details of presentations during the roundtable held at the Seton Hall University School of Law and introduce the two resulting articles contained with this Book of the Seton Hall Law Review.  相似文献   
158.
Middle school students’ experiences at after-school programs were compared as they participated in different types of activities and with different social partners. The students (N = 165) attended eight programs in three Midwestern states. A total of 1,596 experiences were randomly sampled using the Experience Sampling Method (ESM) during 1 week in the fall of 2001 and 1 week in the spring of 2002. Student engagement was conceptualized as the simultaneous experience of concentration, interest, and enjoyment. Students reported high levels of engagement while participating in sports activities and arts enrichment activities at the after-school programs, and low levels of engagement while completing homework at programs. They reported being more engaged in activities involving both adults and peers than activities with peers only. Concentrated effort, intrinsic motivation, and positive and negative mood states were also compared by program activities and social partners. Findings about participants’ subjective experiences and engagement in specific program activities have implications for understanding after-school programs as a context for youth development.
Deborah Lowe VandellEmail:

David J. Shernoff   is an assistant professor of educational psychology at Northern Illinois University broadly interested the relationship between human development and education. He completed his doctoral studies at the University of Chicago and the Sloan Center for Working Families, where he applied Mihaly Csikszentmihalyi’s theory of flow and Experience Sampling Method (ESM) to the study of engaging educational contexts. From 2000 to 2003, he served as a post-doctoral fellow at the University of Wisconsin, Madison. His recent publications include “Student engagement in high school classrooms from the perspective of flow theory” in School Psychology Quarterly, 18, 158–76 (with M. Csikszentmihalyi, B. Schneider, and E. S. Shernoff 2003). Deborah Lowe Vandell   is the Chair of the Department of Education at the University of California, Irvine where she holds a joint appointment in the Department of Psychology and Social Behavior. Prior to these appointments, Professor Vandell was the Sears Bascom Professor of Education at the University of Wisconsin, Madison where she held appointments in Educational Psychology, Human Development and Family Studies, and Psychology. Professor Vandell is principle investigator of several multi-site studies examining child care, family, and after-school experiences. The author of more than 130 articles, Dr. Vandell’s research has focused on the effects of developmental contexts (early child care, schools, after-school programs, families, neighborhoods) on children’s social, behavioral, and academic functioning.  相似文献   
159.
While the AMBER Alert system is intended to facilitate the rescue of abducted children, it has practical and psychological limitations. Participants indicated their emotions and perceptions about Alerts before and after reading a vignette that manipulated details about a child abduction. Results indicate that the Alert system fits some criteria of Crime Control Theater (CCT). CCT polices are emotion-based legal actions that appear to address crime but fail to do so and have unintended consequences. Participants experienced panic about child abduction and believed the system is an effective tool which should be used no matter the unintended consequences. Emotions and panic positively related to perceptions of the system. Still, perceptions were not particularly positive, indicating that some participants recognize the system's limitations. Female and community participants generally had more positive perceptions than males and students, especially when experiencing high emotions or panic. Reading about an abduction reduced emotions overall and led to more positive perceptions (but only in the ‘AMBER Alert success’ condition). Reading about an ‘Alert failure’ did not affect perceptions. Results highlight the role of emotion in shaping perceptions of the system. As with other CCT policies, lawmakers should rely less on community sentiment and more on science when adopting legislation.  相似文献   
160.
For nearly 30 years, the methods utilized in illicit cocaine hydrochloride production have remained relatively consistent. Cocaine hydrochloride is typically produced one kilogram at a time. As a result, each individual kilogram is unique and distinct from other kilograms in any particular seizure based on the total alkaloid profile, occluded solvent profile, and isotopic signature. Additionally, multi-kilogram cocaine seizures are often comprised of cocaine from several different coca growing regions. There has been a documented shift in this type of processing based on the recent analysis of a large cocaine seizure in the Eastern Pacific. Signature analyses of samples from 21 kg randomly selected from a 517 kg seizure were virtually identical. Triplicate analyses of each sample via gas chromatography with flame ionization detection, static headspace gas chromatography mass spectrometry, and isotope ratio mass spectrometry were completed. An initial outlier evaluation of the data and an in-depth univariate analysis indicated there was no statistically significant difference among the 21 samples at the 95% confidence interval. Principal components analysis did reveal consistent minor deviations between the samples and known authentic data from the Nariño coca growing region of Colombia. These deviations were only observed on the latter principal components and could be explained by differences in solvent selection during cocaine hydrochloride processing. Chemical analyses in addition to a thorough statistical evaluation suggest a shift in the traditional small-batch method of cocaine processing to a multi-kilogram, high throughput approach.  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