全文获取类型
收费全文 | 797篇 |
免费 | 52篇 |
专业分类
各国政治 | 66篇 |
工人农民 | 35篇 |
世界政治 | 80篇 |
外交国际关系 | 70篇 |
法律 | 365篇 |
中国政治 | 1篇 |
政治理论 | 223篇 |
综合类 | 9篇 |
出版年
2023年 | 3篇 |
2022年 | 4篇 |
2021年 | 9篇 |
2020年 | 16篇 |
2019年 | 25篇 |
2018年 | 33篇 |
2017年 | 41篇 |
2016年 | 36篇 |
2015年 | 39篇 |
2014年 | 27篇 |
2013年 | 119篇 |
2012年 | 31篇 |
2011年 | 35篇 |
2010年 | 18篇 |
2009年 | 39篇 |
2008年 | 41篇 |
2007年 | 39篇 |
2006年 | 41篇 |
2005年 | 33篇 |
2004年 | 29篇 |
2003年 | 23篇 |
2002年 | 21篇 |
2001年 | 17篇 |
2000年 | 17篇 |
1999年 | 7篇 |
1998年 | 7篇 |
1997年 | 15篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 2篇 |
1992年 | 8篇 |
1991年 | 5篇 |
1990年 | 3篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 4篇 |
1981年 | 2篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1973年 | 4篇 |
1968年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有849条查询结果,搜索用时 15 毫秒
781.
Abstract: The policy-making process in Canadian broadcasting involves a wide array of groups from institutional, industrial and sociocultural sectors. The policy review leading up to adoption of a new federal Broadcasting Act in 1991 saw these groups deploy a range of tactics in attempting to influence broadcasting policy in line with their respective interests. In this article, we report on the relative influence of different categories of actors with regard to Canadian broadcasting policy in light of the resources they enjoy and the strategies they use to maximize their use. For non-industrial public interest and sociocultural interest groups, the fact that an important part of the policy process unfolded in public was an important factor for gaining access, through legislative change, to the broadcasting system itself. Where economic interests were concerned, however, the means deployed were radically increased and sought to address policy makers directly. The resulting policy outcomes demonstrated that, depending on the particular issue and the interest base promoting it, both public action and direct pressure could be effective levers of influence. In short, influence on the policy process was shown to be relative, depending on the degree of access to the decision making process enjoyed by the various parties. Sommaire: Le processus de définition des politiques de radiodiffusion au Canada implique un large éventail de groupes institutionnels, industriels et socio-culturels. Lors de la révision des politiques qui a précédé l'adoption, en 1991, d'une nouvelle Loi sur la radiodiffusion fédérale, ces groupes ont adopté toute une gamme de tactiques pour essayer d'influer sur la politique en matière de radiodiffusion, con-formément à leurs intérêts respectifs. Dans le présent article, nous exposons l'influence relative des diverses catégories d'intervenants en ce qui conceme la politique de radiodiffusion canadienne, en tenant compte des ressources à leur disposition ainsi que des stratégies qu'ils ont utilisées afin de maximiser l'utilisation de ces ressources. Pour les gmupes d'intérêt socio-culturel ou d'intérêt public non industriel, le fait meme qu'une partie importante du processus d'élaboration des politiques ait eu lieu en public fut un élément important afin d'accéder, par voie de modification legislative, au système de radiodiffusion lui-même. Cependant, lorsque des intérêts économiques étaient en cause, les moyens utilisés étaient nettement supérieurs et visaient directement les décideurs. Les résultats en termes de politique adoptée ont démontré que, selon la question concernée et le groupe d'intérêt qui la préconisait, tant l'intervention publique que la pression directe pouvaient exercer une influence efficace. En bref, il s'avére que l'influence sur le processus de définition des politiques est relative et défend le degré d'accès qu'avaient les diverses parties au processus décisionnel. 相似文献
782.
Independent scrutiny can help empower bureaucracy's critics so that they might question “government as usual” tendencies, and therefore pressure governments to produce services as advertised. Our premise is that in order to honestly share access to decisions bureaucracies must share access to the information necessary to make those decisions. In particular, more pointed and sophisticated external scrutiny may embarrass management into fully applying the tools it now has available, but often fails to utilise. Data-based dialogues can make government more responsive and responsible in its use of available resources, that is, more productive and more accountable. 相似文献
783.
Marc Landy 《Public administration review》2008,68(Z1):S186-S198
Measured in dollar terms, Hurricane Katrina was the worst natural disaster in American history. Mega‐disaster response recovery and mitigation put federalism to an especially difficult test because they require speed, efficiency, decisiveness, and effective coordination. This essay focuses on the response to and recovery from Katrina in order to probe the implications of mega‐disasters for federalism. It understands federalism as being composed of four dimensions: the three levels of government and the civic realm. It tests key defenses of federalism against civic and government performance during Katrina. It offers examples of successes and failures involving all four dimensions and provides specific recommendations for improving mega‐disaster mitigation, response, and recovery while maintaining an appropriate constitutional balance among the three levels of government and between the civilian government and the military. 相似文献
784.
Although the link between government performance and citizen trust in government seems intuitive, the relationship is not supported in some of the literature. This article argues that the difficulty of empirically demonstrating this link is rooted in the difficulty of defining and measuring government performance meaningfully. Performance measurement can improve citizen trust in government directly through citizen participation in the evaluation process or indirectly by improving citizens' perceptions of government performance. To achieve this potential, current performance-measurement practice must be improved: to measure what citizens really care about, to be more systematic and integrated across agencies, to include other governing entities, and to become an ongoing participatory process in which governments and citizens are both transformed. 相似文献
785.
786.
787.
788.
789.
Kaiser C Bachmeier B Conrad C Nerlich A Bratzke H Eisenmenger W Peschel O 《Forensic science international》2008,180(1):32-36
Stamp marks are used as a unique identification for a range of items, but these can be erased for criminal activities. Erased marks can sometimes be recovered by etching or magnetic means. The present study looked at the application of Fry's reagent to recover erased marks from steel. The investigation also demonstrated that Fry's reagent can deteriorate on storing and will require a longer etching time. The effect of different applied forces of stamping was investigated, and the depth of the underlying deformation was determined by etching after varying degrees of metal removal. The amount of metal needing to be removed depends on the force applied to the die. Metal removal also affects the time needed for recovery. The underlying structural change remains as a hidden identification mark, and could potentially be used by manufacturers as an unseen identifier. A model for the underlying deformation is proposed. 相似文献
790.
Tabernanthe iboga belongs to the Apocynaceae family. In this study, we report the case of a 37-year-old black male working as a security agent in Paris and found dead naked on the beach in Gabon after consumption of iboga. Autopsy revealed a drowning fatality and a myocardial abnormality (myocardial bridging). Samples of blood, urine, bile, gastric content, liver, lungs, vitreous, spleen and hair were taken. Biological fluids were liquid-liquid extracted with saturated NH4Cl pH 9.5 and methylene chloride/isopropanol (95/5, v/v) in presence of clonazepam-d(4), used as internal standard. After decontamination with dichloromethane, hair was cut into small pieces then sonicated for 2h in saturated NH4Cl pH 9.5 before extraction by methylene chloride/isopropanol (95/5, v/v). After evaporation the residues were reconstituted in methanol/ACN/formate buffer pH 3, from which 10 microL were injected into an ODB Uptisphere C(18) column (150 mm x 2.1mm, 5 microm) and eluted with a gradient of acetonitrile and formate buffer delivered at a flow rate of 200 microL/min. A Quantum Ultra triple-quadrupole mass spectrometer was used for analyses. Ionization was achieved using electrospray in the positive ionization mode (ESI). For each compound, detection was related to three daughter ions (ibogaine: m/z 311.4-->122.1, 174.1 and 188.1; noribogaine: m/z 297.4-->122.1, 159.1 and 160.1; clonazepam-d(4): m/z 319.9-->218.1, 245.1 and 274.1). Ibogaine and noribogaine were detected in all autopsy samples. Hair segmentation was not possible as hair was very short and frizzy. Concentrations of 1.2 and 2.5 ng/mg, respectively were detected. Neither other licit or illicit drugs nor alcohol were found. The presence of ibogaine and noribogaine in all autopsy samples was consistent with the recent absorption of Tabernanthe iboga, which was assumed to be responsible of the drowning fatality. The history of exposure, regarding hair analysis, is discussed. LC-MS/MS appears to be the best method for analyzing complex and poorly volatile alkaloids in autopsy samples and particularly in hair, due to the presence of a nitrogen ring and the relatively low concentrations to be measured. 相似文献