Intraparty Hostility: Social Identity,Subidentity, and the Hostile Media Effect in a Contested Primary

The hostile media effect (HME) has generally been tested in terms of in-groups and out-groups, with a “neutral” story in between. This ignores the nature of many social groups as comprising subgroups, often but not always sharing feelings of connectedness and purpose. In cases when bounded subgroups are at odds with one another, HME provides little guidance. A contested partisan primary provides such a case. This study takes identity centrality, candidate favorability, and perceived social network homogeneity as measures of partisanship and involvement, hypothesizing relationships between each and perceived bias against one’s candidate and party. Findings show that markers of candidate-focused social identity predict greater perceived bias against one’s candidate during the 2016 primary season, while party-focused identity fails to predict perceived bias against one’s party. This suggests that candidate support identity overrides plain partisanship during primaries, supporting concern that a heated primary might damage general election party unity. Subsequent postconvention findings suggest that the salience of candidate-focused identity fades, while homogeneity of one’s network regarding party support helps to make perceived hostility toward one’s party identity more salient. However, as campaigns become more candidate-centered, the contestation between nested candidate and party identities may grow fiercer.     

中美建交与两国在朝鲜半岛互动模式的转化

从国家互动理论的视角来考察中美与朝鲜半岛问题是一种有益的学术尝试。朝鲜战争使中美长期处于冲突型互动模式,直至中美建交,两国在朝鲜半岛的互动模式开始转化。中美建交虽然没有立即使两国在朝鲜半岛互动的性质发生转变,但建交给两国领导人带来的认知变化、直接政治互动的增多及两国朝鲜半岛政策的局部调整,为双方在朝鲜半岛进行的合作性互动提供了契机,由此,中美在朝鲜半岛的互动由建交前的冲突型互动逐渐向竞争型互动转化。     

Women,Science and Culture: Science in the Nineteenth-century Periodical

The Victorian periodical press offers unique insights into many diverse areas of nineteenth-century experience, and the complex relations between gender, science and culture in particular, yet it has been consistently marginalized as a primary resource in academic study. The Science in the Nineteenth-century Periodical (SciPer) project at the universities of Sheffield and Leeds is creating a new point of access to a wide range of non-specialist periodicals across the century by means of a fully searchable electronic index. By detailing the entire contents of each journal, and not just those articles that have a clear scientific relevance, it becomes clear that science formed a fundamental and integral part of nineteenth-century culture. The electronic index, moreover, will include hypertext cross-reference links that will allow the user to identify a dialogic pattern of encounters between ostensibly diverse articles, rather than only to browse in a simple chronological mode. By adopting this innovative approach, the SciPer database will reveal the manifold intertextual relations between the fictional works of women writers like Elizabeth Gaskell and the scientific articles that often appeared in the pages of the same magazines, and will show that writers of both sexes and across several different genres actively engaged in vibrant interdisciplinary debates concerning scientific issues in a forum provided by the periodical. Although the SciPer database itself is not specifically focused on issues of gender, the index will include several periodicals aimed explicitly at a female readership and, by providing access to titles still rarely utilized in modern scholarship, it will offer further insights into the important contemporary debates about women and science, as well as the more subtle ways, in which gendered imagery was employed within scientific discourse. This article details some critical findings from Punch , The English Womans Domestic Magazine , Cornhill Magazine and the Review of Reviews .     

美国强大的原因及发展趋势

美国强大的原因可以从势、道、制、术、器与士（即国际格局与国际力量对比、美国的意识形态与核心价值体系、政治经济与社会制度、科技与战略政策制定、经济与军事硬实力、人才培养与储备机制等方面）进行分析。由于新兴国家崛起,美国单极体系已经终结,美国霸权相对削弱,但是美国仍将在相当长的一段时间之内维持“一超”的地位。从劳动生产率、基础科研实力及研发投入、高等教育体系、外资投资环境、人口结构以及新兴产业等因素考察,美国经济长远来看仍具有较大的相对优势。未来美国霸权依然存在,美国二战后所确立的以“结构自由主义”为特征的国际秩序是美国霸权能够持久的最重要的基础,也是二战后西方国家之间的关系能够超越“零和”博弈格局的重要原因。美国对华战略并非遏制,而是“对冲/两面下注”。中美之间存在超越历史上传统大国“零和”博弈的可能,中国领导人提出建立中美新型大国关系的建议反映了这种战略远见。     

亚太地区的安全稳定与俄中利益

亚太地区出现一个全新的局面。一方面,区域内的国际合作正在拓展,一个能够带来区域稳定和安全并得到普遍认同的体系正在形成。另一方面,亚太国家之间争夺地区内影响力的对抗和竞争的危险性日益加重,甚至有可能导致公开冲突并阻碍区域一体化的进程。为此,继续构建一个囊括地区内所有国家的,以合作、互信、对等安全为基础的新机制十分重要。亚太地区的发展直接影响俄罗斯联邦的利益,俄罗斯倡导要确保地区的稳定和安全,以及囊括所有亚太国家的建设性合作。近年来,俄罗斯政府特别重视促进东西伯利亚及远东地区的经济发展,该地区是俄罗斯实现亚太地区一体化的一个重要载体。开展同中国的合作,进一步开发俄罗斯远东地区,对于俄罗斯贯彻经济战略、实现经济现代化、融入亚太地区的经济空间,都具有原则性的重要意义。     

美国《2018年出口管制法》评析与启示

美国《2018年出口管制法》在术语定义和政策声明、出口管制的权限和管理、许可证、确定和控制"新兴和基础技术"出口的要求、涉及与美国全面禁运的国家有关的审查、惩罚和强制执行等方面作出了许多新规定。该法使美国出口管制体系走向法典化、系统化和多边化,建立跨部门许可审查机制,确立"合规协助"条款,扩大了"新兴和基础技术"这一出口管制范围,并扩张出口管制域外管辖权,同时加强了惩罚和执行力度。我国应注重"新兴与基础技术"的管制,完善出口管制系列清单,扩大出口管制管理机构的执法权限,为出口经营者出口合规提供具体指导,严格执行阻断法,推进双边与多边出口管制标准的设立以应对该法的实施。     

Comparison of two methods for isolating DNA from human skeletal remains for STR analysis

Abstract: The quality and efficiency of a standard organic DNA isolation method and a silica‐based method using the QIAGEN Blood Maxi Kit were compared to obtain human DNA and short tandem repeats (STRs) profiles from 39 exhumed bone samples for paternity testing. DNA samples were quantified by real‐time PCR, and STR profiles were obtained using the AmpFlSTR^® Identifiler^® PCR amplification kit. Overall, the silica‐based method recovered less DNA ranging from 0 to 147.7 ng/g (average 7.57 ng/g, median = 1.3 ng/g) than did the organic method ranging from 0 to 605 ng/g (average 44.27 ng/g, median = 5.8 ng/g). Complete profiles (16/16 loci tested) were obtained from 37/39 samples (95%) using the organic method and from 9/39 samples (23%) with the silica‐based method. Compared with a standard organic DNA isolation method, our results indicate that the published silica‐based method does not improve neither the quality nor the quantity of DNA for STR profiling.     

布卢姆认知领域教育目标分类理论评析

生物学上动植物分类学的理论为布卢姆构造其认知领域教育目标分类理论提供了借鉴。根据人的认知目标是从识记相对简单的知识到非常抽象的思维这样一个渐进过程,布卢姆把教育的认知目标分为六大主类（识记、领会、应用、分析、综合及评价）以及其它亚类。这种理论被证明“对研究和教学两方面都是相当有用的”。但由于布卢姆认知目标分类理论不是认识过程的先后层次,不是行为发展的过程,没有揭示出能力形成的内在机制,也缺乏学习理论的指导,导致了教育实践中的诸多困惑。我们应对布卢姆理论进行深刻的反思,立足本国实际,构建本土的教育目标分类理论。     

猪血凝性脑脊髓炎病毒SYBR Green Ⅰ实时荧光定量PCR检测方法的建立

根据GenBank中的猪血凝性脑脊髓炎病毒(HEV)S蛋白基因的保守序列设计合成1对特异性引物,经PCR扩增S基因并构建含有该基因片段的重组质粒,将该重组质粒作为阳性标准品,建立了检测HEV的SYBR Green Ⅰ real-time PCR方法。结果显示,该方法线性关系良好,相关系数为0.994;敏感性高,检测下限为1.6×104 copies/μL;特异性强,与牛冠状病毒、伪狂犬病病毒和猪繁殖与呼吸综合征病毒不发生交叉反应;并且重复性好,组内、组间的变异系数均小于2%。应用该方法对采集的20份疑似HEV感染病料进行检测,其中16份为阳性,而用常规PCR检测同样的样品,仅8份为阳性。表明建立的SYBRGreen Ⅰ real-time PCR方法具有快速、特异、敏感、重复性好等优点,可用于临床上HEV的检测及定量分析。     

鸡肾型传染性支气管炎病毒的分离鉴定

从陕西省榆林市某蛋用种鸡场疑似肾型传染性支气管炎病鸡中分离到了1 株肾型IBV(定名为YL 04),并对分离病毒进行了血凝性、血凝抑制性、致病性、鸡胚矮小化、电镜特征等生物学特性鉴定及S1基因5′端的RT PCR鉴定。结果表明,该分离株经10 g/L胰酶处理后的各代病毒尿囊收集液均可凝集鸡红细胞;标准阳性血清可特异性地抑制其凝集性;可复制出与自然发病相同的病例;病毒传代物有明显的致鸡胚矮小化作用;透射电镜下可见有近似球形、直径100 nm左右的冠状病毒粒子;用RT PCR方法扩增到1 条373 bp的目的片段,其核苷酸序列与IBV CQ/01/2004株序列的同源性达98%。