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   368篇
  免费   30篇
各国政治   11篇
工人农民   38篇
世界政治   70篇
外交国际关系   18篇
法律   196篇
中国政治   4篇
政治理论   59篇
综合类   2篇
  2023年   7篇
  2022年   4篇
  2021年   6篇
  2020年   12篇
  2019年   20篇
  2018年   21篇
  2017年   21篇
  2016年   26篇
  2015年   15篇
  2014年   16篇
  2013年   42篇
  2012年   18篇
  2011年   14篇
  2010年   9篇
  2009年   8篇
  2008年   15篇
  2007年   12篇
  2006年   14篇
  2005年   25篇
  2004年   17篇
  2003年   23篇
  2002年   18篇
  2001年   7篇
  2000年   2篇
  1998年   4篇
  1997年   1篇
  1993年   6篇
  1992年   4篇
  1991年   2篇
  1990年   1篇
  1989年   4篇
  1987年   1篇
  1986年   2篇
  1984年   1篇
排序方式: 共有398条查询结果,搜索用时 31 毫秒
81.
What is the role of stipends as an institutional facilitator in volunteer civic service? By examining the relationship of stipend receipt to volunteer diversity, time commitment, and perceived benefits from a longitudinal study of older adults serving in Experience Corps, this article assesses stipend status relative to volunteer sociodemographic characteristics, motivations, intensity and duration of time served, and volunteers’ self‐reported benefits. The findings underscore how stipends may promote participant diversity. In particular, stipended older adult volunteers serve for longer periods of time, but their motivations for serving do not differ. Stipended volunteers report higher perceived benefits than nonstipended volunteers. The results suggest that stipends may leverage wider inclusion, increase retention, and contribute to other benefits, but additional research is needed using more controlled and comparative designs.  相似文献   
82.
Traditional forensic soil comparisons are performed via physical and/or chemical examinations of color, texture, and mineral content, leaving any organic- or water-soluble fractions unexamined. This study uses high-performance liquid chromatography (HPLC) and ion chromatography (IC) to assess the qualitative and quantitative variation in these fractions of soil. Soil samples (n=120) were collected over the course of 3 weeks from urban, suburban, and rural locations in and around Lansing, MI. Additional samples from six of these locations (two urban, two suburban, and two rural) were collected once a week for 10 weeks for temporal analysis. Nine additional samples, equally spaced over a 1 m(2) grid, from these same six locations were collected for spatial analyses. Qualitative and quantitative analysis of the resultant chromatograms separated the 120 samples into 10 groups by HPLC and 23 groups by IC. This study shows that using HPLC and IC to analyze the organic- and water-soluble fractions of soil can successfully discriminate samples. Quantitative analysis of the results eliminates some false inclusions by providing further differentiation of samples. The results of this study indicate that adding HPLC and IC analyses to traditional forensic soil analysis schemes can improve overall sample differentiation. The methods used in this study were also able to detect both qualitative and quantitative variations in soil over a relatively small geographic area. This demonstration of soil heterogeneity underscores the importance of the collection of a representative known sample population when assessing a forensic soil comparison. Significant temporal variation was also demonstrated over the course of 10 weeks of sampling; however, samples were found to be consistent over shorter periods of time. Baseline levels of inorganic anions were determined via IC; these levels may be useful in assessing the significance of anions detected in soil from cases involving low explosives.  相似文献   
83.
ABSTRACT

This study examines the relationship between organizational structure (size and complexity) and administrative intensity and, subsequently, the effect of administrative intensity on organizational performance in the context of four-year institutions of higher education in the United States between 2003 and 2009. Organizational size has a negative effect on administrative intensity and supports the notion of economies of scale. Size and complexity also interact such that complexity has a greater effect on total administrative intensity in larger organizations. While administrative intensity has a nonlinear relationship with degree productivity, suggesting a tipping point of 30% total administration, it has little direct effect on graduation rates.  相似文献   
84.
ABSTRACT

Using the case study of Trinidad and Tobago, this article analyzes the process of reciprocal international socialization that allows Beijing to construct a cognitive and normative space conducive to a new regional order in the Caribbean which should be politically friendly, economically profitable, and socially open to its government, companies, and citizens. We argue that there has been a shift in the identity of Trinidad’s state-society complex due to the influence of China’s very visible political, economic, and social conditionalities. Their impact on political elites (which is reflected in government discourse and actions) and on the society at large (as shown by interviews with 30 Trinidadian nationals) is analyzed in order to show that Type I, ‘role playing’ socialization has been reached. However, frustration within Trinidad’s society with the domestic effects of China’s economic and social conditionalities clearly limits the potential for the evolution toward the more advanced Type II socialization exemplified, in the same region, by the Soviet-Cuban relationship. This suggests that, at least in the near future, key features of the Chinese approach incompatible with its self-proclaimed win-win nature will prevent Beijing from upgrading its status to that of a decisive socializer in the Caribbean.  相似文献   
85.
Thus a word or an image is symbolic when it implies something more than its obvious and immediate meaning. It has a wider “unconscious” aspect that is never precisely defined or fully explained — Carl Gustav Jung.  相似文献   
86.
Abstract

The article traces the relationship between the concept of the traditional sublime and the contemporary cultures of the extreme and their fascination with unlimitation. It is asked to what degree the aesthetic category of the sublime, generally defined as a ‘formlessness’, can assist in exploring and making sense of the cultures of the extreme. The cultures of the extreme are analysed by means of three tropes, namely the ecstasy of speed, the immersion into immediacy, and the shrinking of the natural landscape. By utilising these three tropes or hermeneutical tools, the author attempts to show how these events typify the contemporary obsession with extremes, and can indeed be likened to a pseudo-sublime or kitsch sublime.  相似文献   
87.
This paper analyzed the existing literature on risk and protective factors for intimate partner violence among Hispanics using the four-level social-ecological model of prevention. Three popular search engines, PsycINFO, PubMed, and Google Scholar, were reviewed for original research articles published since the year 2000 that specifically examined factors associated with intimate partner violence (IPV) among Hispanics. Factors related to perpetration and victimization for both males and females were reviewed. Conflicting findings related to IPV risk and protective factors were noted; however, there were some key factors consistently shown to be related to violence in intimate relationships that can be targeted through prevention efforts. Future implications for ecologically-informed research, practice, and policy are discussed.  相似文献   
88.
Family support, urban stressors, and peer behavior were examined in relation to externalizing symptoms in 605 predominantly low-income urban sixth through eighth grade adolescents. Mother and father support were each associated with lower levels of externalizing symptoms in both males and females. For males, father absence was associated with increased peer externalizing behavior and heightened rates of youth externalizing symptoms. Stress (in the form of major life events, daily hassles, and exposure to violence) and peer externalizing behavior were examined as mediators of the relation between parent support and youth externalizing symptoms. Increased stress exposure mediated the relation between weak mother and father support and youth externalizing symptoms. Additionally, for females, peer externalizing behavior mediated the relation between weak mother support and youth externalizing symptoms.  相似文献   
89.
90.
There are no previous surveys of psychopathy and psychopathic traits in representative general population samples using standardized instruments. This study aimed to measure prevalence and correlates of psychopathic traits, based on a two-phase survey using the Psychopathy Checklist: Screening Version (PCL: SV) in 638 individuals, 16–74 years, in households in England, Wales and Scotland. The weighted prevalence of psychopathy was 0.6% (95% CI: 0.2–1.6) at a cut score of 13, similar to the noncriminal/nonpsychiatric sample described in the manual of the PCL: SV. Psychopathy scores correlated with: younger age, male gender; suicide attempts, violent behavior, imprisonment and homelessness; drug dependence; histrionic, borderline and adult antisocial personality disorders; panic and obsessive–compulsive disorders. This survey demonstrated that, as measured by the PCL: SV, psychopathy is rare, affecting less than 1% of the household population, although it is prevalent among prisoners, homeless persons, and psychiatric admissions. There is a half-normal distribution of psychopathic traits in the general population, with the majority having no traits, a significant proportion with non-zero values, and a severe subgroup of persons with multiple associated social and behavioral problems. This distribution has implications for research into the etiology of psychopathy and its implications for society.  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