绘制"东突"恐怖主义网络

中国的恐怖主义威胁主要来源于国内外的"东突"恐怖组织,这一组织具有特殊的历史根源.本文主要从其犯罪历史、攻击方法及行动方面出发,构建了其网络拓扑结构模型,描述了行动、成员特性,分析了其网络结构特征.分析结果揭示:"东突"恐怖组织的受到多种因素的影响,如地理位置、网络边界等.研究发现"东突"恐怖组织的网络结构是一个树形结构,其表现为没有环,并且具有等级结构.最后,我们根据"东突"恐怖组织未来的演化趋势,提出了一些谨慎的对策与建议.     

领域演化结构识别的主路径方法与高被引论文方法对比研究

高被引论文方法通过节点相似性聚类来反映领域演化结构,而主路径方法则通过节点连通性来揭示领域演化结构。在分析两种方法差异的基础上,以富勒烯领域引文数据为样本,应用Histcite^TM和Pajek对比研究主路径组分完全网络和相同数量顶点的高被引论文网络,结果表明二者的结构与组分差异显著。主路径组分的当年引用数排序的结果表明,多数路径组分不完全是当年的高被引论文,进而证明了主路径分析方法的独特性。     

引文网络的主路径特征研究——以富勒烯领域为例

以富勒烯领域引文数据为样本,通过HistCite^TM生成不同规模与格式的引文网络,利用Pajek集成的三种主路径算法分析不同数据格式、不同网络规模的主路径组分与形态差异,运用曲线拟合方法探索主路径规模与主路径长度间的关系。结果表明:三种主路径算法结果没有显著差异,主路径长度与网络规模呈对数关系,主路径在网络规模约为总顶点数40%后趋于稳定。     

期刊混合聚类的学科分类与交叉学科结构研究

应用基于期刊"引文-文本"拟合相似度的混合聚类算法对Web of Science中SCI、SSCI、A&HCI收录的8 305余种期刊进行聚类分析,并将期刊混合聚类结果与基本科学指标ESI学科分类体系进行比较研究。对于聚类结果与ESI体系相一致的期刊,认为其具有较强的"学科关联度",定义为相应学科领域的"学科内核",其余部分则为"学科外围"。"内核期刊"界定了相应学科的核心知识范围,"外围期刊"则诠释了不同学科的分化和交叉融合等结构特征。     

Institutional Isomorphism and the Community Structure Approach in Visual Framing of the Trayvon Martin Shooting

Institutional isomorphism and the community structure approach present two very different editorial decision-making processes, which could potentially lead to very different news products. This study tested hypotheses related to the two approaches within visual framing of the Trayvon Martin shooting. Images used by two elite national newspapers and three newspapers from racially distinct communities were compared. Evidence of normative isomorphism was found, though it was unclear if intermedia agenda setting by elite publications was responsible. Hypotheses predicting different visual framing among different community structures were not supported. Theoretical implications for considering intermedia agenda setting under the institutional isomorphism framework are discussed.     

Moisture Adsorption Mechanism of Earthen Plaster Containing Soluble Salts in the Mogao Grottoes of China

ABSTRACT

In the Mogao Grottoes of Dunhuang, China, the ambient relative humidity (RH) fluctuation in the caves is the main cause for the deterioration that has been observed, especially the deterioration of the earthen plaster and wall paintings linked to the presence of NaCl and Na₂SO₄ salt contaminants. To help identify the mechanism responsible for this salt-related deterioration and provide a theoretical basis for the development of a preventive conservation regime, this study addressed the basic moisture adsorption mechanisms of earthen plaster with soluble salts by taking an experimental approach. It is shown that, as ambient RH increases, the moisture adsorption process of the plaster containing the soluble salts can be regarded to have three basic stages, as evidenced by the results of the moisture adsorption tests performed on earthen plaster samples with different NaCl or Na₂SO₄ contents at various humidity levels. The moisture adsorption mechanism and its determining factors at each stage are also analysed. In addition, it is suggested that the hygroscopicity of the plaster structure and the interaction between the different kinds of salts in the plaster, which makes the dissolution or hydration of the salt in the plaster pores much easier, should be considered more seriously regarding increases in the ambient RH in the caves.     

Using optical coherence tomography to characterize thick-glaze structure: Chinese Southern Song Guan glaze case study

Abstract

This study explores the structure characteristics of thick glaze, in terms of the case study of Chinese Southern Song Guan (SSG) ware, focusing on the bubble and its media structure, using a novel focus-tracking optical coherence tomography (OCT) system. The OCT images we obtained not only unveil the structural uniqueness of the thick-glaze SSG sample, but also establish a distinguishable structural pattern for aiding authentication. In addition, information revealed in our images provides a logical explanation for the subtle texture and tone of SSG glaze as well as insights into the technologies used in layering and firing these thick glazes.     

Karol Estreicher (1827–1908) and his Bibliografia polska: Negotiating a National Bibliography in Nineteenth-Century Poland

Karol Estreicher (1827–1908) compiled Bibliografia polska [Polish bibliography], an extraordinary retrospective national bibliography of the body of written works of Poland. Chronologically covering the entire history of printing in Poland up to 1900, it consisted of three distinct parts: the nineteenth century; a universal chronological bibliography of Polish publications; and pre-nineteenth century, conventionally called Bibliografia staropolska [Bibliography of old Poland]. So far a total of 56 volumes of Bibliografia polska have been published. That total includes the 35 volumes that constitute parts 1, 2, and 3; the four volumes that, covering 1891–1900, were published outside the framework of the three parts; and the seventeen volumes that constitute the second edition of part 1, the nineteenth-century bibliography. It was an exhaustive but also complicated bibliographic opus. A prolific writer and literary scholar himself, Estreicher devoted—with remarkable endurance and resilience—50 years of his life to its making. Much of the complexity of his bibliography reflected the cultural and intellectual roots of the author and the way he interpreted the meaning of his project.