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   240篇
  免费   5篇
各国政治   19篇
工人农民   4篇
世界政治   19篇
外交国际关系   11篇
法律   117篇
政治理论   75篇
  2022年   1篇
  2021年   4篇
  2020年   9篇
  2019年   7篇
  2018年   12篇
  2017年   15篇
  2016年   9篇
  2015年   5篇
  2014年   13篇
  2013年   19篇
  2012年   7篇
  2011年   25篇
  2010年   12篇
  2009年   10篇
  2008年   11篇
  2007年   18篇
  2006年   10篇
  2005年   9篇
  2004年   6篇
  2003年   12篇
  2002年   12篇
  2001年   5篇
  2000年   4篇
  1999年   2篇
  1998年   1篇
  1996年   3篇
  1988年   1篇
  1985年   2篇
  1980年   1篇
排序方式: 共有245条查询结果,搜索用时 0 毫秒
241.
In open innovation systems, capturing value through external intellectual property (IP) commercialization is an increasingly important strategy for firms to keep pace with competitive changes. However, many firms have major difficulties in creating value through external patent exploitation. To understand these challenges, this paper explores how firms manage their external patent exploitation based on a multiple case study research design with fourteen firms from the pharmaceutical and chemical industry. Adopting a desorptive capacity perspective we find four main factors influencing the firms’ management of external patent exploitation: the type of value creation, the organizational structure, the locus of initiative, and the extent of know-how transfer along with the patent. Based on these factors, three archetypes of external patent exploitation with different levels of desorptive capacity are identified. The article extends the concept of desorptive capacity and existing literature on intellectual property management in the context of open innovation. Managerial implications helping firms to implement external IP commercialization structures are discussed.  相似文献   
242.
In this serial experiment, five human bones with known post-mortem intervals (PMI) in a soil environment from five different epochs (0.2 to approximately 2000 years) were tested in a blind setup with two established rapid tests for the identification of human blood traces (Hexagon-OBTI test and RSID blood test). Based on previous study results concerning the usability of the Luminol test for the first assessment of the PMI of osseous remains, the question arising was whether those test procedures, which are highly sensitive for the detection of human blood components, could also be used to narrow down the post-mortem interval. Five test series were conducted applying modified standard protocols of the manufactures. The aim was to find out whether with prior reaction steps or a prolonged time of incubation hemoglobin or its metabolites can be dissolved from the bone and positive test results can be achieved dependent on the PMI. Four test series yielded negative results for all bone samples and one test series a uniformly weak positive result. The results indicate that rapid tests based on the detection of blood are not suitable for the determination of the PMI of bone samples despite the modification of the standard protocols. Further thorough research is required to clarify the postmortem degradation of hemoglobin in bones.  相似文献   
243.
The identification of decomposed corpses found in domestic settings is frequently problematic because comparative material for methods such as forensic odontostomatology, comparative X-ray analysis, or DNA analysis, is not available. In the case presented here, a photograph from an old, expired passport could be used to successfully identify a "domestic setting" corpse in a skull-photo superimposition. In an additional DNA analysis, 13 STR-loci could be amplified from tissue samples taken from the corpse. DNA comparison with the presumed brother of the deceased yielded a probability of 97.09% for siblingship. Y-STR-analysis was, therefore, performed. The results showed that all of the systems for the presumed brother and the corpse conformed, with the exception of the DYS390 locus, in which allele 21 was found for the corpse and allele 22 for the brother. Despite the rapid development of other identification procedures, skull-photo superimpositions remain an important means of identification. Last not least this is due to the increasing ubiquity of personal photo documents in the age of digital photography. The validity of the results from a DNA analysis in an identification process depends largely on the authenticity of the samples available for comparison and the degree to which the DNA from the corpse is preserved. In the case presented by the authors, positive identification of the corpse solely on the basis of the DNA analysis would not have been possible. Numerous constellations can be imagined for decomposed corpses found in domestic settings for which skull-photo superimpositions may be the only possible option for identifying the corpse.  相似文献   
244.
In German medical and media circles (daily routine, specialist literature, press, novels), the term "domestic-setting corpse" is frequently used, but the term is only vaguely defined. The authors thus decided to perform an in-depth study of the literature, including historic textbooks and all German- and English-language medicolegal journals, going as far back as their first issues, in an attempt to more clearly define the term. Inclusion criteria used in the search were a post-mortem interval of at least 24 hours prior to discovery and discovery of the corpse in a domestic setting. In the literature, 37 cases that complied with the above-mentioned inclusion criteria were found. These cases frequently described "advanced decomposition", often "unclear cause of death" and "problems in identification". These characteristics can thus be considered as being additional pointers in the definition. However, we suggest that the two general defining characteristics of a "domestic-setting corpse" are a post-mortem interval of more than 24 hours before discovery and the discovery of the corpse in a domestic setting.  相似文献   
245.
This paper empirically investigates the economic and political factors that affect a country??s likelihood to sign an arrangement with the IMF and the determinants of the financial size of such a program. Arguably the world and the global financial architecture underwent structural changes after the ending of Cold War and so did the role of the IMF. Hence, we update and extend the work of Sturm et al. (Economics and Politics 17: 177?C213, 2005) by employing a panel model for 165 countries that focuses on the post-Cold War era, i.e., 1990?C2009. Our results, based on extreme bounds analysis, suggest that some economic and political variables are robustly related to these two dimensions of IMF program decisions. Furthermore, we show that it is important to distinguish between concessional and non-concessional IMF loans.  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