Portable high‐resolution automated 3D imaging for footwear and tire impression capture

The forensic science community raised the need for improved evidence recognition, collection, and visualization analytical instrumentation for field and laboratory use. While the 3D optical techniques for imaging static objects have been extensively studied, there is still a major gap between current knowledge and collecting high‐quality footwear and tire impression evidence. Among optical means for 3D imaging, digital fringe projection (DFP) techniques reconstruct 3D shape from phase information, achieving camera‐pixel spatial resolution. This paper presents a high‐resolution 3D imaging technology using DFP techniques dedicated to footwear and tire impression capture. We developed fully automated software algorithms and a graphical user interface (GUI) that allow anyone without training to operate for high‐quality 3D data capture. We performed accuracy evaluations and comparisons comparing with the commercial high‐end 3D scanner and carried out qualitative tests for various impressions comparing with the current practices. Overall, our technology achieves similar levels of accuracy and resolution with a high‐end commercially available 3D scanner, while having the merits of being (1) more affordable; (2) much easier to operate; and (3) more robust. Compared with the current practice of casting, our technology demonstrates its superiority because it (1) is non‐destructive; (2) collects more evidence detail than casts, especially when an impression is fragile; (3) requires less time and money to collect each piece of evidence; and (4) results in a digital file that can easily be shared with other examiners.     

浅析拐卖人口案件侦查之买方市场的防控

拐卖人口现象屡禁不止,根本原因之一是买方市场的存在及发展.本研究基于对拐卖人口买方市场存在发展的背景条件以及当前形势和防控难点进行分析研究,指出买方市场组成结构的复杂性与单方面打击不协调等问题.针对当前背景下采取系统作战方式应对拐卖人口新特点的重要性,通过咨询专家、文献研究以及与主要案发地区一线民警深入沟通,给买方市场防控措施提出相关建议,以期望对拐卖人口案件侦查有一定借鉴意义.     

犯罪学“三”字研究模式专家金其高先生——2011年至2013年学术研究综述之一

"中国治安学第一人"、犯罪学家金其高先生,其著名论断都与数字"三"有密切联系。金先生善用"三"字研究模式引领研究主题,文章标题和主要观点主要由"三"型支撑;善用"三"字研究模式引领研究方法,文章论述框架主要由"三"型支撑;善把"三"字研究模式融入研究内容,语言风格增加了"三"型的幽默和魅力。     

Estimating Individual Contributions to Complex DNA SNP Mixtures.,

High‐throughput sequencing (HTS) of large panels of single nucleotide polymorphisms (SNPs) provides an alternative or complimentary approach to short tandem repeats (STRs) panels for the analysis of complex DNA mixture forensic samples. For STRs, methods to estimate individual contribution concentrations compare capillary electrophoresis peak heights, peak areas, or HTS allele read counts within a mixture. This article introduces three approaches (mean, median, and slope methods) for estimating individual DNA contributions to forensic mixtures for HTS/massively parallel sequencing (MPS) SNP panels. For SNPs, the major:minor allele ratios or counts, unique to each contributor, were compared to estimate contributor proportion within the mixture using the mean, median, and slope intercept for these alleles. The estimates for these three methods were typically within 5% of planned experimental contributions for defined mixtures.     

中国镍白铜技术发明演变为“德国银”专利的历史考证

通过对欧洲现存专利文本、科学实验及调查研究,证明在19世纪初西方曾利用中国古代冶金技术史上一项重要发明——镍白铜技术发明申请专利并获得保护,随后出现了"德国银"生产的兴起。西方近代史是资本主义萌芽、产生、确立的历史,也是专利制度建立的历史,在这一时期,中国科技、经济却从兴盛走向落后。西方曾经盗用中国技术并申请专利保护,故此应该让人们加强知识产权保护意识,保护自己民族的发明创造。     

伪装笔迹的伪装程度对鉴定价值的影响

近年来,利用手写文书进行违法犯罪活动呈现出逐年上升趋势,犯罪分子作案手法不断更新,伪造书写文书的熟练程度不断提高,文书鉴定工作面临巨大挑战。我们在实际操作过程中,必须认真研究笔迹的伪装程度,对于识别、确定伪装程度,提高文检人员技术水平,探讨对伪装笔迹的掌控能力和快速锁定犯罪嫌疑人、侦查破案等方面,具有重要的现实指导意义。     

Political Process and Widespread Protests in China: the 2010 labor protest

Existing studies of collective actions in China pay most attention to frequent but localized protests, but such protests are less likely to deeply drive China's political and social prospect. By contrast, widespread protests are more likely to affect the Chinese Communist Party's authority and policies once they emerge. The goal of this article is thus to probe the conditions under which a widespread protest can happen in China today. This article proposes four necessary conditions grounded in the political process model and tests them by explaining the successful outbreak of the 2010 labor protest. Identifying these conditions helps us understand and predict the political and social development of China.     

A GRAND PLAN

<正>China pursues further modernization in a choreographed approach Socialism with Chinese characteristics has entered a new era,Xi Jinping,General Secretary of the Communist Party of China(CPC)Central Committee declared while delivering a report to the 19th CPC National Congress on October 18.He said that to realize socialist modernization is the overarching goal of