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   144篇
  免费   10篇
各国政治   12篇
工人农民   6篇
世界政治   6篇
外交国际关系   24篇
法律   76篇
政治理论   30篇
  2023年   2篇
  2022年   2篇
  2021年   3篇
  2020年   5篇
  2019年   6篇
  2018年   12篇
  2017年   13篇
  2016年   9篇
  2015年   11篇
  2014年   9篇
  2013年   17篇
  2012年   9篇
  2011年   7篇
  2010年   1篇
  2009年   8篇
  2008年   8篇
  2007年   4篇
  2006年   7篇
  2005年   3篇
  2004年   4篇
  2001年   1篇
  1999年   1篇
  1998年   1篇
  1997年   2篇
  1996年   2篇
  1994年   2篇
  1990年   1篇
  1985年   1篇
  1981年   1篇
  1975年   1篇
  1969年   1篇
排序方式: 共有154条查询结果,搜索用时 15 毫秒
101.
Since coming to power in 2000, Russian president Vladimir Putin has tried to construct a narrative of regaining Russia's status as a major global power. However, in practice the Kremlin has yet to create a coherent strategy or achieve a sense of a co-ordinated foreign policy. While North Africa has not been at the forefront of this narrative, recently Moscow has intensified its diplomatic links and cooperation with the regimes in the region. The Arab Spring presented Russian policy makers with a series of challenges regarding the uncertainty of the developments in the region, but also with renewed economic opportunities. This profile analyses Moscow's relationships with the countries in North Africa (Libya, Egypt, Morocco, Tunisia and Algeria) in the wake of the Arab Spring. In each case the Kremlin aimed to take advantage of the new opportunities without really being guided by an overarching strategy for the region. However, Russia increasingly seems to be keen to position itself in the region as an alternative to the EU or the US, not least in light of the current war in Ukraine.  相似文献   
102.
103.
104.
Different influences moderate the complex association between income and life satisfaction. In the research literature, basic human need satisfaction, interpersonal comparison processes, and adaptation are usually proposed as the driving theoretical mechanisms. Using the German Socio-economic Panel and a self conducted cross-sectional survey for the urban area of Munich this article is empirically testing hypotheses derived from these different explanations. In result, all three mechanisms add to the understanding of the nonlinear income-life satisfaction-relationship. Above a threshold of approx. 800?? monthly disposable income wealth has no further effect on life satisfaction. Based on this finding a definition of individual wealth is proposed. Furthermore, as opposed to income from employment capital income has a neglectable effect on life satisfaction. There is only weak evidence for relative income effects regarding respondent??s neighborhood but stronger evidence for the relevance of comparisons with more specific reference groups such as average citizens. Moreover, panel analyses confirm hypotheses of aspiration and adaptation. Thereby??at least for the well-off??income losses outweigh gains.  相似文献   
105.
106.
107.
Intra-alveolar hemorrhage and hemosiderin have been cited as possible markers of recent and remote asphyxial events. Little study has been undertaken of the potential significance of intra-alveolar hemosiderin in adults as a potential marker of previous sublethal asphyxial episodes. Ten cases of lethal sexual asphyxia (an entity known to be associated with repetitive sublethal asphyxial episodes) and 20 randomly selected, age- and sex-matched controls had sections of lung stained for hemosiderin. Subsequently, intra-alveolar, iron-containing macrophages were counted. All cases were men (ages 15-50 years; mean 31.8). No significant increase in hemosiderin was found in victims of sexual asphyxia, indicating that asphyxial episodes in sublethal sexual asphyxial activities may not be sufficiently intense or prolonged to cause intra-alveolar hemorrhage or that intra-alveolar hemorrhage in adults is a relatively nonspecific finding. These results do not support intra-alveolar hemosiderin deposition as a marker for previous sublethal asphyxial events in autoerotic asphyxia.  相似文献   
108.
The differentiation of SIDS from accidental or inflicted suffocation may be impossible without corroborating findings from the death scene or autopsy or in the absence of a confession from a perpetrator. Pulmonary intra-alveolar hemorrhage (PH) has been proposed as a potential clue to suffocation, but none of the previous studies on this topic have limited SIDS cases to those who were in a safe sleep environment, in which all were found supine and alone on a firm surface with their heads uncovered. Our aims are to: (1) compare PH in SIDS cases found in a safe sleep environment to a control group comprised of infants whose deaths were attributed to accidental or inflicted suffocation and (2) assess the effect of age, CPR, and postmortem interval (PMI), with regard to the severity of PH in this subset of safe-sleeping SIDS cases. We conducted a retrospective study of all postneonatal cases accessioned by the Office of the Medical Examiner in San Diego County, California who died of SIDS or suffocation between 1999 and 2004. A total of 74 cases of sudden infant death caused by SIDS (34 cases as defined above, comprising 8% of the total SIDS cases), accidental suffocation (37), and inflicted suffocation (3) from the San Diego SIDS/SUDC Research Project database were compared using a semiquantitative measure of pulmonary intra-alveolar hemorrhage. The most severe (grade 3 or 4) PH occurred in 35% of deaths attributed to suffocation, but in only 9% of the SIDS cases. Age, duration of CPR attempts and PMI had no effect on the severity of PH in SIDS. Our results indicate that the severity of PH cannot be used independently to differentiate SIDS from suffocation deaths. Each case must be evaluated on its own merits after thorough review of the medical history, circumstances of death, and postmortem findings.  相似文献   
109.
A second collaborative exercise on RNA/DNA co-analysis for body fluid identification and STR profiling was organized by the European DNA Profiling Group (EDNAP). Six human blood stains, two blood dilution series (5-0.001 μl blood) and, optionally, bona fide or mock casework samples of human or non-human origin were analyzed by the participating laboratories using a RNA/DNA co-extraction or solely RNA extraction method. Two novel mRNA multiplexes were used for the identification of blood: a highly sensitive duplex (HBA, HBB) and a moderately sensitive pentaplex (ALAS2, CD3G, ANK1, SPTB and PBGD). The laboratories used different chemistries and instrumentation. All of the 18 participating laboratories were able to successfully isolate and detect mRNA in dried blood stains. Thirteen laboratories simultaneously extracted RNA and DNA from individual stains and were able to utilize mRNA profiling to confirm the presence of blood and to obtain autosomal STR profiles from the blood stain donors. The positive identification of blood and good quality DNA profiles were also obtained from old and compromised casework samples. The method proved to be reproducible and sensitive using different analysis strategies. The results of this collaborative exercise involving a RNA/DNA co-extraction strategy support the potential use of an mRNA based system for the identification of blood in forensic casework that is compatible with current DNA analysis methodology.  相似文献   
110.
Generally, democratic regime type is positively associated with participating in international environmental agreements. In this context, this study focuses on the legal nature of an agreement, which is linked to audience costs primarily at the domestic level that occur in case of non-compliance and are felt especially by democracies. Eventually, more legalized (“hard-law”) treaties make compliance potentially more challenging and as democratic leaders may anticipate the corresponding audience costs, the likelihood that democracies select themselves into such treaties decreases. The empirical implication of our theory is that environmental agreements with a larger share of democratic members are less likely to be characterized by hard law. Results from quantitative analyses strongly support our argument, shed new light on the relationship between participation in international agreements and the form of government, and also have implications for the “words-deeds” debate in international environmental policy-making.  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