Composite Machine Learning Algorithm for Material Sourcing,

This study developed a composite machine learning algorithm for attribution of materials of forensic interest (like ammonium nitrate) to original sources. k-nearest neighbor and random forest models were used for source elimination and classification, respectively, in a two-step, composite algorithm based on particle color, size/shape, and trace element concentration features. Novel approaches for simulation to supplement within-source reference features based on empirically measured multi-lot analyses, an improved hold-one-lot-out method for cross-validation, an assessment of the likelihood of the presence of a reference sample, fusion of the source probabilities from the respective classification models, and the calculation of metrics for assessing ensemble sourcing performance are described. Excellent sourcing predictions were obtained; the sourcing algorithm identified the correct source as the top choice 89% of the time, and the correct source was identified to be an average of 2.7 times more likely than the most likely incorrect source.     

Prevalence of organic gunshot residues in police vehicles

The present study investigated the organic gunshot residue (OGSR) background level of police vehicles in Switzerland. Specimens from 64 vehicles belonging to two regional police services were collected and analysed by LC-MS in positive mode. The driver’s and back seats were sampled separately to monitor potential differences between locations and to assess the risks of a suspect being contaminated by OGSR during transportation to a police station.The results showed that most of the 64 vehicles were uncontaminated (44 driver’s seats and 38 back seats respectively). Up to six of the seven targeted compounds were detected in a single sample, once on a driver’s seat and twice on back seats. The contamination frequency generally decreased as the number of compounds detected together increased. The amounts detected were in the low ng range and less than amounts generally detected just after discharge on a shooter. Our data indicated that detecting a combination of four or more compounds on a police vehicle seat appears to be a relatively rare occurrence. The background contamination observed was most probably due to secondary transfer from police officers (e.g. through recent participation in a shooting session or firearm manipulation) or from firearms stored in the vehicles. The present results might be used as a recommendation to minimize contact of a suspect with contaminated surfaces if OGSR is implemented in routine work in parallel to IGSR analysis.     

DNA Recovery From Tape-Lifting Kits: Methodology and Practice

In the case of suspicious deaths, the technique of 1:1 taping is often used in Belgium. It consists of affixing a large number of adhesive tapes to the body of the victim. It is conventionally aimed at obtaining microtraces (e.g., fibers, hair) and is usually not used for DNA analysis. However, in some cases, DNA analysis of certain areas of interest identified on the 1:1 taping material can offer a last resort solution. The four-step method that is described in this article involves the selection of areas of interest on the body (Step 1), the selection of the corresponding tapes (Step 2), the decontamination of the tapes (Step 3), the selection of areas of interest on the tapes, for DNA sampling (Step 4). The method is illustrated by its successful application in four murder cases. In each case, DNA profiles of good quality could be identified, including profiles of persons different from the victim.     

论道路交通管理中的经济学观念

公安机关应当遵从市场经济规律 ,强化经济成本意识 ,充分认识道路交通管理在经济发展中的地位和作用 ;走出认识上的两个误区 ,确立服务经济发展 ,促进经济发展 ,创造经济价值的观念 ;努力探求既能完成繁重的交通管理任务 ,又能把有限的交通管理“活劳动”和“物化劳动”的使用成本降到最低限度 ,创造一个可持续发展的交通运输环境 ,实现道路安全畅通 ,能耗少、公害低、群众满意的目标。     

公共政策与可持续发展

由于人类片面追求经济增长的发展模式,人类社会逐步陷入了发展的困境——生态环境恶化。摆脱发展困境的唯一选择只有走可持续发展道路。可持续发展战略的贯彻与实施必须有公共政策作保障,因为公共政策与可持续发展具有科学性与价值性的统一。只有加强与完善公共政策的制定与实施,才能促进人类社会的持续、健康发展。     

刑法学课程内容设置探讨——高校不同层次、不同专业刑法学课程教学内容的安排

刑法学体系结构庞大,刑法学课程可根据该体系的重点难点以及培养目标、实际需要等因素确定教学内容的安排。在专科、本科兼招的高等学校,既有必要安排好大专层次各专业的刑法学课程,又应该考虑好本科层次各专业刑法学课程的设置。     

INTRODUCING PERSPECTIVES IN FAMILY LAW AND SOCIAL SCIENCE RESEARCH

This article provides an editorial introduction to the following three related articles on the growing use and influence of social science research in family law. It first considers why this has become problematic and identifies some common strategies used by advocates, sometimes under the guise of scholarship, to destroy the standing of research findings contrary to their ideological or political position. Then it discusses briefly the remedies proposed to mitigate these kinds of problems within the following three articles.     

工业化中后期苏南地区产业升级的路径选择

在工业化的初始阶段,苏南地区主要依靠要素、投资驱动产业升级.进入21世纪以来,这种高投入、高消耗的产业升级路径,使其进一步发展面临巨大的挑战.借鉴日本和韩国等国相关的做法和经验,处于工业化中后期的苏南地区必须以科技创新引领产业升级.其基本路径是:加大科技人才的培养引进力度,突出企业科技创新的主体地位,努力营造科技创新的机制环境,积极推进国际技术的转移与合作,大力促进产业的企业区域集中,加快传统优势产业的高新技术改造.     

鉴定人的责任负担

鉴定人是司法鉴定活动的决定性因素。鼓励专家参与法庭服务与约束专家独立、客观实施鉴定这一对矛盾需要通过制度的合理设置达到一定的平衡状态,以适合诉讼活动的开展。鉴定人的责任负担是体现对鉴定人实施鉴定活动进行约束的主要手段,也是我国进一步深化司法鉴定体制改革不可回避的重要内容之一。     

统一公法学与刑法及刑法学的关系

刑法与刑法学,刑法学与公法学、统一公法学之间不是一种简单的线性关系。从数学中的集合概念来看,狭义的刑法学是统一公法学的组成部分,它们之间是被包含与包含的关系,即狭义刑法学被统一公法学所包含,狭义刑法学是统一公法学的子集。但若以广义刑法学立论,则广义刑法学与统一公法学之间是一种交叉关系,重合的部分即是狭义刑法学,此乃统一公法学与广义刑法学两个集合的交集。