Improved Area of Origin Estimation for Bloodstain Pattern Analysis Using 3D Scanning

An important component of crime scene reconstruction is bloodstain pattern analysis (BPA). Where BPA concerns impact patterns, estimating the area of origin is critical information for scene reconstruction. Traditionally, this is achieved by measuring individual bloodstains and performing trigonometric calculations; however, 3D scanning has been proposed as a viable alternative for overcoming logistical and practical concerns with the manual method. Therefore, this project aimed to establish whether the FARO Focus 3D scanner and FARO Zone 3D software can improve the accuracy of area of origin estimates relative to the manual method. We created a series of eight bloodstain impact patterns and performed paired analysis using the two methods to estimate areas of origin for each pattern. Our data suggested that FARO-derived estimates were generally more accurate than using the manual method. FARO-estimated heights of origin areas were generally closer to the true distance. Both methods underestimated the distance from the wall for most patterns originating 150mm or greater from the wall, but overestimated distances for patterns originating closer to the wall. The degree to which distances were underestimated increased significantly the further the blood source was from the wall and was greater for FARO-derived estimates. The results of this research contribute to the validation of these instruments for operational implementation for BPA and should be considered alongside the practical benefits of 3D scanning relative to manual methods. Further, 3D scanning can provide reliable BPA reconstruction documentation for technical review and court presentation.     

Distribution of the Minutiae in Hypothenar Palm Prints in Slovak Adults: Indications for Personal Identification

Minutiae are small distinguishing features found along every ridge flow, which make each friction ridge print unique. The most common friction ridge prints found at the crime scene are fingerprints; therefore, the most of the minutiae studies are focused exactly on this kind of prints. The authors believe that further examination and enlargement of the palm print database could result in better use of the palm prints for personal identification. We analyzed a total of 160 palm prints from 40 females and 40 males aged between 18 and 70 years from Slovakia. For the evaluation of the minutiae, the area of the hypothenar had to be marked out. The classification of the minutiae used for this study was based on a modified version of the classification system using the total of 13 types of minutiae. The frequency of every minutiae type was calculated and, using the chi-square test with Yates's correction, bilateral and sex differences were assessed. The relationship between the different types of minutiae was examined with Pearson's correlation test. During the initial phases of the identification process, the focus should be on the least common types of minutiae (Y or M and return), which were found not to correlate; thus, their mutual occurrence is random (e.g., overlap—Y or M, crossbar—return, or Y or M—dock). The results of the present study show which specific minutiae types are the most suitable for personal identification. These findings may be beneficial in more effective outcome of the identification process.     

Sample Mining and Data Mining: Combined Real-Time and Retrospective Approaches for the Identification of Emerging Novel Psychoactive Substances

Novel psychoactive substances (NPS) are synthetic drugs that pose serious public health and safety concerns. A multitude of NPS have been identified in the United States, often implicated in forensic investigations. The most common and effective manner for identifying NPS is by use of mass spectrometry and the true utility lies within nontargeted acquisition techniques. During this study, a liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QTOF-MS) assay was developed, validated, and implemented for forensic toxicology testing. A SCIEX TripleTOF™ 5600 + with SWATH^® acquisition was used. Resulting data were compared against an extensive library database containing more than 800 compounds. The LC-QTOF-MS assay was applied to the reanalysis of biological sample extracts to discover emergent NPS. More than 3,000 sample extracts were analyzed, and more than 20 emerging NPS were detected for the first time. Among these were isopropyl-U-47700, 3,4-methylenedioxy-U-47700, fluorofuranylfentanyl, N-methyl norfentanyl, 2F-deschloroketamine, 3,4-methylenedioxy-alpha-PHP, eutylone, and N-ethyl hexedrone.     

Detection of Mitragynine in Mitragyna Speciosa (Kratom) Using Surface-Enhanced Raman Spectroscopy with Handheld Devices

A simple, quick, selective, sensitive, and effective field-friendly method capable of being used by nonexperts has been developed for detecting mitragynine in Mitragyna speciosa (kratom) using surface-enhanced Raman spectroscopy (SERS). Over 100 samples and blanks (known to be either positive or negative for the presence of mitragynine) were examined in duplicate using five identical handheld Raman spectrometers, which provided a data set of over 1,000 examinations. Based on the results of these analyses, the method yielded a true-positive rate of 99.3%, a true-negative rate of 97.9%, a false-positive rate of 2.1%, and a false-negative rate of 0.7%. The average minimum detectable concentration (C_m) of mitragynine that reproducibly yielded a match for one of the library spectra on all five instruments was determined to be 342 ng/mL (ppb). This C_m value is a conservative estimate considering that the extraction process was not fully optimized by this study, which was not necessary since the C_m value achieved was well below typical mitragynine concentrations in kratom (1.3–2.3%). The method is ideal (i) for prioritizing samples for additional testing using other more time-consuming laboratory-based techniques needed to detect and quantify mitragynine and (ii) for field use at international mail facility (IMF) satellite laboratories to help interdict kratom and prevent this dangerous product from reaching the U.S. supply chain.     

人民币国际化背景下汇率对工业行业就业的影响——基于跨境贸易结算的影响因素视角

将跨境贸易人民币结算比重引入劳动力市场动态均衡模型,推导出汇率影响就业的全新路径,并利用2000-2018年中国工业行业面板数据进行实证分析。研究发现:通过进出口产品结构贸易路径,汇率对行业总体就业的正向影响最显著,其次是经由汇率变动预期路径,而汇率通过净出口指数路径对就业的负向影响较微弱。人民币汇率对不同行业就业的影响产生差异的根源是不同行业进出口产品结构及产品异质性的差距导致在汇率变动的不同情形下,行业间跨境贸易人民币结算的水平不同,从而造成外贸企业对劳动力的需求具有差异。并且,技术特征及贸易来源地特征是造成行业间就业水平差异的显著因素。     

论互联网时代诽谤罪的公诉范围

我国刑法对诽谤罪采取自诉为主、公诉为补充的双轨制模式。由于刑法但书“严重危害社会秩序和国家利益”的公诉依据具有模糊性,同时司法解释本身缺乏解释力和可操作性,存在同义解释、近义解释等问题,加剧了公诉诽谤罪和其他罪名之间的冲突和竞合,特别是当被害人为地方领导干部时,诽谤罪的公诉权在实务中存在被滥用风险,部分限制公诉权的要件在实务中被淡化甚至忽略。从相对狭义的角度看,“严重危害社会秩序和国家利益”只有在行为人对侵犯个体法益具备主观故意,但对侵犯社会法益或国家法益不具备主观故意(或无法证明其具备故意)的情形下,才有其独特的法律适用价值并不与刑法其他罪名相冲突。为妥善处理和平衡诽谤犯罪中惩治犯罪和保障人权的关系,适应互联网时代的内外部变化,建议通过修改我国刑法,将诽谤罪区分为情节不严重、情节严重、情节特别严重的三种形态,为充分保障宪法权利,情节不严重的不作为犯罪处罚;为充分保障自诉权,情节严重的为绝对告诉乃论;为依法惩治犯罪,对符合特定形式要件和实质要件,情节特别严重的诽谤犯罪可以依法公诉,以维护网络信息秩序。     

大数据时代日本个人信息保护法探究

个人信息本来是极其隐私的事物,在大数据时代却时刻处于"裸奔"状态,时刻面临被侵犯的风险。特别在新冠肺炎疫情防控中,大数据技术发挥了重要作用,个人信息保护再次引起关注。整体而言,日本个人信息保护法以"个人优先"与"公共优先"的宗旨博弈为出发点,以"个人信息"的概念界定为基础,以个人信息权的保护为核心,以个人信息保护机构的独立设置为落脚点,为个人信息的保护奠定了基础。我国应当积极行动起来,尽快颁布《个人信息保护法》,助力大数据时代个人信息保护和数字经济的发展。     

Fluorescence of a Natural Fluorophore as a Key to Improve Fingerprint Contrast Image

The optical and morphological properties of resveratrol were investigated. This nontoxic fluorescent natural material, emitting in the visible blue light, was used as an optical marker, enabling the enhancement of the image contrast coming from relief pictures marked on challenging surfaces. By applying appropriated imaging softwares, this marker was verified to be very useful in the latent fingerprint recognition deposited on different wood surface types, mainly those with high level of roughness, where conventional forensic materials do not allow effective fingerprint image visualization.     

动力灸治疗肝肾亏虚型膝骨关节炎疗效观察

目的 观察动力灸治疗肝肾亏虚型膝骨关节炎（knee osteoarthritis ，KOA）的临床疗效。方法 将符合纳入标准的60例肝肾亏虚型KOA患者随机分为试验组与对照组，每组30例。试验组给予动力灸治疗，对照组予以普通针刺治疗，两组均每天治疗1次，连续治疗21 d为1个疗程。1个疗程结束后比较两组患者治疗前后视觉模拟量表（visual analogue scale，VAS）评分、西安大略和麦克马斯特大学骨关节炎指数（the Westem Ontario and McMaster Universities Osteoarthritis Index, WOMAC）、中医证候评分及临床疗效，并记录两组不良反应情况。结果 治疗后两组患者VAS评分、WOMAC评分、中医证候评分较治疗前均明显改善（P<0.05），且试验组改善程度明显优于对照组（P<0.05）；试验组临床疗效明显优于对照组（P＜0.05）。对照组有1例患者出现晕针情况，而试验组患者均未出现不良反应。结论 动力灸治疗肝肾亏虚型KOA疗效确切，不良反应少，能有效地缓解膝关节疼痛，改善患者的生活质量。     

司法改革方法论的反思性整合——一个实践理性的视角

在全面依法治国的时代背景下,司法改革的推进需要在实践理性的指导下,通过新的方法论体系来予以重新解读和把握。当下司法改革的方法论面临价值理性缺失、工具理性误区和理论范式失衡的现实困境,需要在问题导向的基础上,借鉴和利用多种社会科学方法,透过多种视角探讨如何认识改革、如何推进改革、如何评价改革,在实践建构中实现方法体系的反思性整合。以"制度化的社会回应型司法"为基本目标,协调价值理性与工具理性的冲突,统合国家治理的实践逻辑与法治的价值逻辑,统筹推进司法制度的改革和构建。