暗网环境下恐怖主义信息挖掘与分析

随着互联网和人工智能的快速发展,恐怖主义活动方式变得更为隐秘。网络恐怖主义活动空间从表网的在线社区与视频分享平台转向暗网黑市交易和暗网论坛。针对暗网节点通信和交易信息高度匿名等特点,相应的反恐工作需要采取新的技术手段,以深度切入恐怖分子用于扩大影响的暗网空间。为此,可以设计和优化专门适用于暗网的聚焦爬虫工具,挖掘恐怖主义活动信息;可以搭建涉恐事件数据模型,分析恐怖组织可能的线下攻击手段;可以利用社会网络分析和超链接分析方法,定位暗网内恐怖主义隐蔽社区和危险用户集群。通过准确把握暗网中的匿名恐怖主义活动规律,抓住安全监控与防范的重点、难点,综合施策,以及适时制定和精准实施反恐网络安全策略,能够最大限度遏制暗网恐怖主义的危害,保护国家安全和人民利益。     

Analyses factorielles et choix méthodologiques: réplique à Markus Freitag

In this contribution, we discuss the number of factors to consider as well as the consequences of rotation in the case of principal components analysis, a technique belonging to the family of factor analysis. The article by Freitag in this issue, dedicated to the study of social capital in Switzerland, is used as example. This contribution shows the impact of different missing values estimations and, more generally, stresses the importance of looking at different solutions in an exploratory perspective. It underscores also the importance to have access to the data in order to allow a new analysis and, consequently, the possibility of the scientific debate.     

Ausmaß, Strukturen und Implikationen präsidialer Macht im postkommunistischen Raum

This research note builds on recent results of the literature on presidentialism to develop a new measure of presidential power. The Index of Presidential Power (IPP) differentiates three dimensions: legitimacy, legislative and non‐legislative powers. The IPP can be used for all types of governmental systems in different political regimes. For the first time the IPP estimates presidential power granted by the constitution in all 28 post‐communist countries. This information is collected in the IPP data set, which is used to carry out analyses at the aggregate level as well as at the level of the individual presidential power dimensions. Results show that the semi‐presidential category is of little use. The comparison of the IPP with alternative indices of presidential power in post‐communist countries indicates that political analysis should give more attention to presidential power structures.     

Zwischen Kultur und Kalkül? Vertrauen und Sozialkapital im Kontext der neoinstitutionalistischen Wende

Trust and social capital work in social networks as informal institutions, favouring cooperation between the participants of such social interaction. However, the increasing use of both terms has been accompanied by vanishing conceptual and theoretical precision. In order to counterbalance this development this article tries to clarify some of the major puzzles connected with both terms. First, we embed trust and social capital within the institutionalist turn in political science. Second however, we demonstrate that trust and social capital have been modelled from at least two perspectives: sociological institutionalism and economic institutionalism. Furthermore, attempts of combining those approaches have lead to decreasing theoretical consistency. Finally, we propose that economic institutionalism is theoretically and empirically more fruitful to explain the creation and destruction of social capital.     

血液中乌头碱、次乌头碱、新乌头碱的LC/MS/MS分析

目的　建立血液中乌头碱、次乌头碱、新乌头碱的LC/MS/MS分析方法。方法　用 1%三氯乙酸 乙腈萃取血液样品 ,采用电喷雾离子源 ,正离子MRM扫描。结果　本方法线性相关系数r≥ 0 992 2。最低检测浓度(LOQ ,S/N =5 )分别为乌头碱 2 0ng/ml ,次乌头碱 0 5ng/ml ,新乌头碱 0 5ng/ml。空白血添加回收率 91 2 5 %～10 3 1%,变异系数 (CV ,n =6) <10 93 %。结论　LC/MS/MS法灵敏可靠 ,样品处理快速简便 ,适用于血液中乌头碱、次乌头碱、新乌头碱的检测。     

人心肌梗死心肌肌钙蛋白T脱失的免疫组化观察

目的 观察人梗死心肌中心肌肌钙蛋白T的脱失情况，探讨其在人心肌梗死死后诊断中的应用价值。方法 应用免疫组化LSAB法，对人心肌梗死心肌肌钙蛋白T的脱失情况观察。结果 人梗死心肌肌钙蛋白T有明显脱失，通过计算机图像分析显示，人梗死心肌肌钙蛋白T的脱失面积与正常人心肌之间存在显著性差异(P＜0.01)。结论 心肌肌钙蛋白T(CTnT)可能成为人心肌梗死的诊断指标之一。     

中国"舞"台原创与市场的突破点

中国舞蹈舞台演出的现代发展与突破需有三个条件 :社会环境、原创性作品和市场经营。当前 ,三个条件中仅具备社会大环境 ,而就更重要的两个条件来说 ,原创还缺乏现代作品的个性思维色彩与深度 ;市场运作缺少小而灵活的演出组合 ,以及稍小的演出场所。因而中国“舞”台的真正繁荣 ,还有待编导和舞者们、管理者和艺术经纪人的奋力突破。     

国际秩序辨析

国际秩序是国际政治的一个重要范畴,建立国际新秩序是中国国际战略的一个基本目标。在国际秩序的研究中,国际秩序的概念、构成要素、制约因素、性质判断等,仍是一些有待辨析和澄清的理论问题。