现场分析处理技术的研究与思考

随着科技的发展,三维信息、三维虚拟现实动画已经越来越多的出现在人们的视野中。国内一些公安机关已经将三维虚拟技术应用到犯罪现场数据采集中,为了减少三维采集数据处理的时间,提高应用数据的效率。本文将研究方向定位在研发一个集一维信息、二维信息、三维信息、漫游系统、三维仿真动画等功能于一身的三维制作平台,并探讨其在案件侦查中的运用。     

Mismatched multiplex PCR amplification and subsequent RFLP analysis to simultaneously identify polymorphisms of erythrocytic ESD, GLO1, and GPT genes

ESD (esterase D), GLO1 (glyoxalase I), and GPT (glutamate pyruvate transaminase) are human erythrocytic isoenzymes and have previously been applied in forensic medicine caseworks. The molecular bases of the polymorphic gene expression products have been demonstrated to be because of SNPs in respective coding regions. However, it has not been revealed whether the SNPs conferring the polymorphisms to the aforementioned erythrocytic isoenzymes could be simultaneously detected by using a simple PCR method. In this study, we used mismatched primers to simultaneously amplify three common isoenzyme loci so that all amplified products contained the same Hph I cleavage sites. The products were then digested with Hph I and electrophoretically separated and stained so that alleles were identified. The accumulated values for the probability of discrimination power and excluding the probability of paternity to the aforementioned systems attained 90.41% and 41.72%, respectively, in the Chinese Han population. This assay could be extremely valuable for future forensic medicine practices.     

Variation in the Measurement of Cranial Volume and Surface Area Using 3D Laser Scanning Technology

Abstract: Three‐dimensional (3D) laser scanner models of human crania can be used for forensic facial reconstruction, and for obtaining craniometric data useful for estimating age, sex, and population affinity of unidentified human remains. However, the use of computer‐generated measurements in a casework setting requires the measurement precision to be known. Here, we assess the repeatability and precision of cranial volume and surface area measurements using 3D laser scanner models created by different operators using different protocols for collecting and processing data. We report intraobserver measurement errors of 0.2% and interobserver errors of 2% of the total area and volume values, suggesting that observer‐related errors do not pose major obstacles for sharing, combining, or comparing such measurements. Nevertheless, as no standardized procedure exists for area or volume measurements from 3D models, it is imperative to report the scanning and postscanning protocols employed when such measurements are conducted in a forensic setting.     

Exploring FDR'S relationship with the press: A historical agenda‐setting study

This historical agenda‐setting study examined the extent to which Franklin Roosevelt's issue agenda, as expressed in his first seven State of the Union speeches, correlated with subsequent coverage in seven major newspapers and the degree to which newspaper coverage correlated with FDR's issue agenda. While past works have emphasized Roosevelt's ability to influence media coverage, this study suggests that Roosevelt reacted to previous coverage more than he influenced subsequent coverage. Past researchers contend that Roosevelt's strong support early in his first term deteriorated subsequently. By contrast, our study found stronger correlations between FDR's issue agenda and subsequent coverage later in his presidency. FDR reacted to, rather than influenced, coverage in newspapers he read and influenced coverage in newspapers he did not read. Roosevelt's issue agenda posted stronger correlations for the papers that supported him than those that opposed him. This study suggests, then, that historical conditions, amount of exposure to the newspaper, and political leanings of the newspaper are contingent conditions influencing the agenda‐setting process and should be considered in future agenda‐setting studies.     

战略机遇期与中国的外交战略与策略选择

在战略机遇期内 ,中国外交应实施以下战略和策略 :把握中美关系走向 ,努力构建中美关系发展的稳定框架 ;广泛建立伙伴关系 ,发展制衡、协调与合作的大国关系 ;“与邻为善、以邻为伴” ,加强睦邻友好 ,积极经营周边     

Shaping the Scope of Conflict in Scotland’s Fracking Debate: Conflict Management and the Narrative Policy Framework

This study applies a narrative lens to policy actors’ discursive strategies in the Scottish debate over fracking. Based on a sample of 226 newspaper articles (2011–2017) and drawing on key elements of the narrative policy framework (NPF), the research examines how policy coalitions have characterized their supporters, their opponents, and the main regulator (Scottish government). It also explores how actors have sought to expand or contain the scope of conflict to favor their policy objectives. Empirically, only the government strives for conflict containment, whereas both pro‐ and anti‐fracking groups prioritize conflict expansion through characterization contests and the diffusion and concentration of the costs/risks and benefits of fracking. In theoretical terms, the study proposes that Sarah Pralle’s conflict management model, which emphasizes symmetrical strategies of conflict expansion by both coalitions, is a potential tool to revise extant NPF expectations about the different narrative strategies of winning and losing coalitions. Moreover, the fact that policy actors mostly employ negatively rather than positively framed characters in their narratives may be a valid expectation for similar policy conflicts, particularly under conditions of regulatory uncertainty.     

Collaborative R&;D: intellectual property rights between Tsinghua University and multinational companies

Tsinghua University, one of the top universities in China, has conducted a lot of collaborative R&D projects with multinational companies in the recent years. One of tough issues in the collaborative R&D is to deal with the intellectual property rights. The Chinese Patent Law and other relevant laws make Tsinghua University to look for more intellectual property rights. Several factors such as the input from the collaborative parties, the property of R&D, the relation between the collaborative project and the activities of R&D made before, or to be made after, the collaboration, and the life and potential market of the technologies play an important rule in the treatment of Intellectual property rights. The different collaborative models have different models of the distribution of intellectual property rights between the University and multinational companies.      

西安汉人D1S80位点基因频率调查

利用PCR技术、小型聚丙烯酰胶凝胶电泳及银染法，检测D1S80位点的VNTR扩增片段长度多态性（Amp－FLP）。在175名无关的西安地区汉族人群中发现了22个等位基因，片段大小分布于320～750bp之间，频率分布为0．0057～03314，杂合度为82．3％，个人识别率（DP）为0.9588，非父排除率（EPP）为0．6704。对7个家系23名相关个体分析，证实DIS80位点的遗传符合孟德尔方式。已发现的64种基因型分布符合Hardg－Weinberg定律。