全文获取类型
收费全文 | 159篇 |
免费 | 9篇 |
专业分类
各国政治 | 5篇 |
工人农民 | 6篇 |
世界政治 | 22篇 |
外交国际关系 | 11篇 |
法律 | 56篇 |
中国政治 | 2篇 |
政治理论 | 64篇 |
综合类 | 2篇 |
出版年
2023年 | 7篇 |
2022年 | 1篇 |
2021年 | 2篇 |
2020年 | 7篇 |
2019年 | 8篇 |
2018年 | 8篇 |
2017年 | 10篇 |
2016年 | 6篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 31篇 |
2012年 | 9篇 |
2011年 | 4篇 |
2010年 | 1篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 3篇 |
2006年 | 6篇 |
2005年 | 5篇 |
2004年 | 5篇 |
2003年 | 6篇 |
2002年 | 5篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1994年 | 5篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1982年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1970年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有168条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
Kerr T Oleson M Wood E 《Canadian HIV/AIDS policy & law review / Canadian HIV/AIDS Legal Network》2004,9(2):13-19
Due to the ongoing health crisis among injection drug users in Vancouver, Canada, there have been repeated calls for the establishment of safe injection sites (SISs) since the early 1990s. In April 2003, in response to a large-scale police crackdown and government inaction, a group of activists opened an unsanctioned SIS in Vancouver's Downtown Eastside (DTES). The 327 Carrall Street SIS operated for 181 days despite considerable police harassment and limited financial support. During the operation of the SIS, volunteers supervised over 3000 injections and demonstrated the feasibility of a user-run low-threshold SIS. The experience of the SIS provides valuable lessons for those seeking to advance the interests of injection drug users through community mobilization and direct action approaches. In this article, Thomas Kerr, Megan Oleson, and Evan Wood describe the events surrounding the establishment, operation, and closing of the unsanctioned SIS, and outline the lessons learned. 相似文献
105.
Post-blast residues are potential interferents to chemical detection of landmines. To assess the potential problem related to 2,4,6-trinitrotoluene (TNT), its post-blast residue was identified and quantified. In the first part of this study laboratory-scale samples of TNT (2 g) were detonated in a small-scale explosivity device (SSED) to evaluate the explosive power and collect post-blast residue for chemical analysis. Initiator size was large relative to the TNT charge; thus, issues arose regarding choice of initiator, residue from the initiator, and afterburning of TNT. The second part of this study detonated 75 to 150 g of military-grade TNT (typical of antipersonnel mines) in 55-gal barrels containing various witness materials (metal plates, sand, barrel walls, the atmosphere). The witness materials were analyzed for explosive residue. In a third set of tests, 75-g samples of TNT were detonated over soil (from Fort Leonard Wood or Sandia National Laboratory) in an indoor firing chamber (100 by 4.6 by 2.7 m high). Targeted in these studies were TNT and four explosive-related compounds (ERC): 2,4-dinitrotoluene (DNT), 1,3-dinitrobenzene (DNB), 2- and 4-aminodinitrotoluene (2-ADNT and 4-ADNT). The latter two are microbial degradation products of TNT. Post-blast residue was allowed to age in the soils as a function of moisture contents (5 and 10%) in order to quantify the rate of degradation of the principal residues (TNT, DNT, and DNB) and formation of the TNT microbial degradation products (2-ADNT and 4-ADNT). The major distinction between landmine leakage and post-blast residue was not the identity of the species but relative ratios of amounts. In landmine leakage the DNT/TNT ratio was usually greater than 1. In post-blast residue it was on the order of 1 to 1/100th of a percent, and the total amount of pre-blast residue (landmine leakage) was a factor of 1/100 to 1/1000 less than post-blast. In addition, landmine leakage resulted in low DNT/ADNT ratios, usually less than 1, whereas pre-blast residues started with ratios above 20. Because with time DNT decreased and ADNT increased, over a month the ratio decreased by a factor of 2. The rate of TNT degradation in soil observed in this study was much slower than that reported when initial concentrations of TNT were lower. Degradation rates yielded half-lives of 40 and 100 days for 2,4-DNT and TNT, respectively. 相似文献
106.
Evan M. Berman 《The Journal of Technology Transfer》1990,15(3):5-12
This research examines the impact of research and development (R&D) consortia on the competitiveness of American companies.
It also concludes that since passage of the 1984 National Collaborative Research Act, which allows companies to jointly perform
research, only a few R&D consortia have been formed and they do not have much impact on companies through applications of
new technology. It is suggested that R&D consortia may have more impact on firms that are catching-up technologically or for
which the particular research is tangential to their core business.
He holds a Ph.D. in public policy from the George Washington University (1988), and has worked for the National Science Foundation,
the Congressional Office of Technology Assessment, and the National Academy of Sciences. His interests focus on technology,
economic competitiveness, and government policy. He has recently published on these topics in Research Policy (August 1990),
and Policy Studies Review (Spring 1991, forthcoming). 相似文献
107.
Given the substantial interest in public service ethics, this study examines its foundations as reflected in paradigmatic textbooks—a unit of analysis that informs both theory and practice in the field. The interpretative framework employed evaluates the context (the amount and placement of the topic, the use of graphics, and sources cited) as well as the content (conceptualization of management ethics and inclusion of implementation issues) of ethics found in the publications. A limited definition of a professional—one in possession of largely technical skills—is reflected in the textbooks. The implications of the findings are explored. 相似文献
108.
The COVID-19 crisis demanded rapid, widespread policy action. In response, nations turned to different forms of social distancing policies to reduce the spread of the virus. These policies were implemented globally, proving as contagious as the virus they are meant to prevent. Yet, variation in their implementation invites questions as to how and why countries adopt social distancing policies, and whether the causal mechanisms driving these policy adoptions are based on internal resources and problem conditions or other external factors such as conditions in other countries. We leverage daily changes in international social distancing policies to understand the impacts of problem characteristics, institutional and economic context, and peer effects on social distancing policy adoption. Using fixed-effects models on an international panel of daily data from 2020, we find that peer effects, particularly mimicry of geographic neighbors, political peers, and language agnates drive policy diffusion and shape countries' policy choices. 相似文献
109.
ABSTRACTThis article focuses on a less visible and less studied type of political violence, namely violence that occurs within political parties. We use new, district-level data to compare the temporal and spatial dynamics of intra-party violence to those of general election violence across selected sub-Saharan African countries, including both democracies and autocracies, from 1998 to 2016. Relying on cross-national and sub-national analyses, we show that intra-party violence follows a unique pattern. First, unlike general election violence, intra-party violence peaks prior to election day as it is often sparked by individual parties’ candidate nomination processes. Second, low levels of competitiveness – typically theorized to reduce the risk of election violence – increase the risk of intra-party violence on the sub-national level. Thus, dominant party elections do not necessarily see less election-related violence than hotly contested elections. Rather, violence may be pushed from election day to intra-party competitions. If we neglect the study of violence within political parties, we thus risk underestimating the threat of election violence and misdiagnosing its causes. 相似文献
110.
Bryce Jensen Dietrich Courtney L. Juelich 《Journal of Elections, Public Opinion & Parties》2018,28(2):208-224
ABSTRACTPresidential candidates often speak to their party’s issues because parties are thought to have “greater competence on handling” some issues versus others [Petrocik 1996, “Issue Ownership in Presidential Elections, with a 1980 Case Study.” American Journal of Political Science 40 (3): 825–850, 825]. The present study considers whether Hillary Clinton and Donald Trump tend to use different vocal inflections when talking about their party’s issues. Using the audio from the three 2016 presidential debates, we not only find Hillary Clinton and Donald Trump seem to be more emotionally invested in their party’s issues, but they use distinct vocal patterns which suggest they “own” some issues more than others. To assess whether viewers responded more positively to these different vocal inflections, we used the valence of 428,185 live-tweets. Ultimately, we found Twitter was net-positive when the candidates raised their vocal pitch while talking about their party’s issues. This suggests nonverbal cues are an important component of issue ownership. 相似文献