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   103篇
  免费   14篇
各国政治   17篇
世界政治   2篇
外交国际关系   9篇
法律   69篇
中国政治   1篇
政治理论   19篇
  2023年   2篇
  2021年   1篇
  2020年   1篇
  2019年   3篇
  2018年   5篇
  2017年   7篇
  2016年   6篇
  2015年   10篇
  2014年   8篇
  2013年   7篇
  2012年   9篇
  2011年   3篇
  2010年   3篇
  2009年   3篇
  2008年   4篇
  2007年   7篇
  2006年   3篇
  2005年   4篇
  2004年   5篇
  2003年   8篇
  2002年   4篇
  2001年   2篇
  2000年   1篇
  1999年   1篇
  1998年   1篇
  1995年   2篇
  1991年   1篇
  1988年   1篇
  1986年   1篇
  1983年   2篇
  1982年   1篇
  1971年   1篇
排序方式: 共有117条查询结果,搜索用时 15 毫秒
1.
2.
This article describes the evolution of a performance measurement system in a government job training program. In this program, a federal agency establishes performance measures and standards for substate agencies. The performance measurement system's evolution is at least partly explained as a process of trial and error characterized by a feedback loop: The federal agency establishes performance measures, the local managers learn how to game them, the federal agency learns about gaming and reformulates the performance measures, possibly leading to new gaming, and so on. The dynamics suggest that implementing a performance measurement system in government is not a one-time challenge but benefits from careful monitoring and perhaps frequent revision.  相似文献   
3.
Ce texte résume et complète les principaux résultats d'une recherche consacrée à l’étude de la formation des opinions dans les votations populaires de politique extérieure. Guidée par le modèle théorique élaboré par John Zaller et basée sur une réanalyse des enquêtes VOX de la période 1981‐1995, cette étude montre que la formation des opinions en politique extérieure ne constitue pas un cas particulier, mais se distingue seulement des autres domaines politiques du point de vue des conditions sous lesquelles elle se produit (intensité des campagnes référendaires, type et niveau de conflit au sein de l’élite). Les analyses multivariées conduites dans ce texte confirment et enrichissent nos résultats antérieurs, en mettant en particulier en exergue l'importance du niveau de formation et des ressources cognitives relatives pour le soutien des projets gouvernementaux en  相似文献   
4.
Scanning electron microscopy analysis of experimental bone hacking trauma   总被引:2,自引:0,他引:2  
The authors report on their macro- and microscopy study of bone lesions made by a sharp force instrument (a single blade knife), and a sharp-blunt instrument classified as a chopping weapon (a hatchet). The aim of this work was to attempt to identify the instrument by analyzing the general class characteristics of the cuts. Each weapon was used on human bones. The results indicate that macroscopic analysis is more problematic. The microscopic analysis assessed that characteristics examined were effective in distinguishing sharp from sharp-blunt injury to the bone. The microscope facilitates analysis unachievable with macroscopic methods, some three-dimensional characteristics not visible to the naked eye being clearly defined with its use. Emphasis has been placed on the value of SEM as an anthropologist's tool in bone lesion injuries.  相似文献   
5.
6.
Value of hair analysis in postmortem toxicology   总被引:4,自引:0,他引:4  
It is generally accepted that chemical testing of biological fluids is the most objective means of diagnosis of drug use. The presence of a drug analyte in a biological specimen can be used to document exposure. The standard in postmortem drug testing is a general unknown screening, followed by the gas chromatographic/mass spectrometric confirmation conducted on a whole blood sample. In recent years, remarkable advances in sensitive analytical techniques have enabled the analysis of drugs in unconventional biological specimens such as hair. The advantages of this sample over traditional media, like urine and blood, are obvious: collection is almost non-invasive, relatively easy to perform, and in forensic situations it may be achieved under close supervision of law enforcement officers to prevent adulteration or substitution. Moreover, the window of drug detection is dramatically extended to weeks, months or even years. The aim of this review is to document the current status of hair analysis in postmortem toxicology.  相似文献   
7.
The extraction of impurities from illegally produced 3,4-methylenedioxymethamphetamine (MDMA) has been studied in order to optimize the parameters. Two different MDMA samples were used. Particular attention was paid to the influence of the pH, the evaporation step, and the sample storage. The method used was an extraction of impurities by diethyl ether from a buffer solution at pH 11.5, followed by gas chromatography (GC) mass spectrometric (MS) analyses after a dryness concentration under monitored conditions of the ethereal extract. Repeat extractions of the same sample gave an average relative standard deviation (RSD) of less than 8.5% within day and less than 10.5% between days.  相似文献   
8.
Applying John Zaller's model of opinion formation to survey data covering 15 years (1981–95) of direct democracy in Switzerland, this paper provides a contribution to the debate about opinion formation in foreign policy. On the one hand, the Swiss experience contradicts the widespread view that citizens are poorly informed about and little interested in foreign affairs. On the other hand, direct democracy often translates into governmental defeats in this field. We address these mixed results and show that opinion formation in foreign policy is not a special case, and differs from that in domestic policy only with respect to the circumstances under which it occurs. In particular, we highlight the unusual type and level of conflict within the elite on foreign policy issues, which translates into distinct patterns of attitudes among the public.  相似文献   
9.
In recent years regional representation offices have proliferated in Brussels. Among the many aims of these offices are influencing the allocation and securing the transfer of European Structural and Cohesion funds. However, our knowledge about whether they have succeeded in this goal is limited. In this paper, we assess whether regional offices in Brussels have managed to affect the commitment and payment of Structural and Cohesion funds beyond the officially stated economic criteria of eligibility. The paper uses a custom-made survey of Brussels offices, complemented by economic, institutional, and political data. The results of the analyses for 123 regions over the period 2009–13 highlight that the capacity – proxied by the budget and staff of the office – of the regional offices to influence the commitment and payment of Structural and Cohesion funds has been negligible, when not outright negative. Regional lobbying in Brussels does not lead to more funds or to an easier disbursement of regional development funds.  相似文献   
10.
Since 1960, it has been demonstrated by various analytical procedures that high concentrations of arsenic were present in Napoleon's hair. Various authors, indicating that the detected arsenic levels are a consequence of external contamination, have challenged the results of these examinations. We have tested two strands of hair, referenced as Noverraz and Grand Maréchal Bertrand. Samples were incubated 6 h in water at 90 °C, and arsenic speciation was carried out by HPLC–ICP/MS. The residue was injected on a cation-exchange PRP-X200 column that allows the detection of arsenobetaine and on an anion-exchange PRP-X100 column to test for the mineral forms. In these conditions, the inorganic species As(III), As(V) and their metabolites (DMA and MMA) were separated. Analysis of hair samples highlighted massive amounts of total arsenic (42.1 and 37.4 ng/mg). Arsenical species found in the two samples of analyzed hair are distributed in the following: As(III) 31.1 and 44.7%; As(V) 66.3 and 53.2%; DMA 0.42 and 0.15%. Traces of MMA were detected, and 2% of the species could not be identified. These results prove that more than 97% of the arsenic found in the hair of Napoleon is in inorganic form, which is consistent with a chronic intoxication to arsenic.  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