Fingerprint analysis for the determination of hand origin (right/left) using the axis slant in whorl patterns

Fingerprints are frequently encountered during both civil and criminal investigations. Fingerprints possess numerous characteristics that assist with personal identification. Determining the hand of origin (right or left) for an individual fingerprint would help reduce investigation time and potentially eliminate certain suspects. In this study, we collected a total of 2 900 single digit fingerprints from 290 individuals, and the whorl axis slant was examined in the 743 whorl pattern fingerprints (385 from the right hand and 358 from the left hand). A slant towards the right side was present in 81.82% of samples from the right hand, while a slant towards the left side was observed in 80.73% of samples from the left hand. After applying a chi-square test to the dataset, the results were found to be statistically significant for the determination of hand origin. Our results suggest that the whorl axis slant in a fingerprint is indicative of hand origin (right or left).

Key points

• Single digit fingerprints with whorl pattern were analyzed.
• Whorl “axis slant” was used to determine the hand origin.
• Right axis slant would indicate the right hand of the print.
• Left axis slant would indicate the left hand of the print.

     

Responsibility Determination: Free Will and Legal Responsibility in the Age of Artificial Intelligence

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坚守中医学核心内涵是高等中医教育的根本

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欧盟反倾销调查不同阶段关于产业损害认定的法律标准及证据规则

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证据保全制度的功能及其扩大化

基于诉讼数量不断增长和现代型诉讼要求先收集证据、后提出事实主张的客观需要,为实现预防诉讼、促进诉讼、集中化审理和多元化解决纠纷之目标,两大法系各主要国家纷纷对证据保全及类似制度进行了改革,使证据保全制度除保全证据外,又具有了确定事实、开示证据和诉讼外解决纠纷的多种功能。为强化当事人举证责任,保障当事人证据收集权和证明权的实现,我国也必须扩大证据保全制度的机能,一方面增设确定事物状态和经对方当事人同意之证据保全类型,另一方面鼓励当事人在证据保全程序中就与纠纷解决相关的事项达成协议。     

用PCR扩增X-Y-特异片段性别鉴定的研究

采用5%Chelex-100处理方法提取 DNA,用 PCR 扩增 Amelogenin 基因片段检测血痕和毛根的性别。扩增一个样品只需1/10体积3mm~2血痕 Chelex-100处理液或1/10体积一根毛发 Chelex-100处理液(含模板 DNA)。100例血液样品结果显示,在男性可同时显现977bpX 特异片段和788bpY 特异片段,而在女性只观察到977bp X 特异片段,该方法用于性别鉴定可靠、灵敏、方便。     

关于上颌牙弓性别差异的研究

利用自动显示游标卡尺测量200例（男、女各100例，年龄18～24岁）上颌石膏模型上牙弓宽、长及高等18个指标。经统计分析发现除切牙弓长、尖牙间距对应高及第二双尖牙间距对应高外，其余15项测量指标男性均大于女性（P＜0．05）。逐步判别分析仅用7个测量指标，判别率可达到75．50％。     

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