Sexual Dimorphism in Finger Ridge Breadth Measurements: A Tool for Sex Estimation from Fingerprints

Previous research has demonstrated significant sexual dimorphism in friction ridge skin characteristics. This study uses a novel method for measuring sexual dimorphism in finger ridge breadths to evaluate its utility as a sex estimation method from an unknown fingerprint. Beginning and ending in a valley, the width of ten parallel ridges with no obstructions or minutia was measured in a sample of 250 males and females (N = 500). The results demonstrate statistically significant differences in ridge breadth between males and females (p < 0.001), with classification accuracy for each digit varying from 83.2% to 89.3%. Classification accuracy for the pooled finger samples was 83.9% for the right hand and 86.2% for the left hand, which is applicable for cases where the digit number cannot be determined. Weight, stature, and to a lesser degree body mass index also significantly correlate with ridge breadth and account for the degree of overlap between males and females.     

利用中国汉族成人股骨上端CR片特征判定年龄

目的探讨中国汉族成人股骨上端CR片的特征随年龄变化的规律,以推断年龄。方法 277例中国汉族成人骨盆正位CR片,其中男性139例,年龄范围18-83岁,女性138例,年龄范围18-85岁,选取股骨上端的股骨头、股骨颈、大转子内的骨小梁及股骨上端髓腔高度四项指标,观察不同年龄各指标的变化进行统计分析。结果成人股骨头、股骨颈骨小梁变化和股骨上端髓腔高度是影响45岁以下年龄变化的重要因素,股骨大转子影响较小。四项指标对45岁以上年龄组均是影响年龄变化的重要因素。利用以上指标建立的回归方程能很好的反映成人股骨上端的增龄性变化,预测骨龄较为准确。结论利用成人股骨头、股骨颈、股骨大转子内骨小梁的改变及股骨上端髓腔高度变化可推断年龄。     

Pubic Symphyseal Age Estimation from Three‐Dimensional Reconstructions of Pelvic CT Scans of Live Individuals

Skeletal age estimation using the pubic symphysis is a reliable and popular practice among forensic anthropologists. In instances in which accessing the skeleton is impossible, such as in the case of living individuals, three‐dimensional (3D) reconstructions of computed tomography (CT) scans can be created and analyzed for aspects of the biological profile. This study examined 3D reconstructions of pelvic CT scans of a sample of 44 live adults to estimate age using the Suchey–Brooks J Hum Evol 1990;5(3):227‐38 method. Images were created using OsiriX software (Pixmeo, Geneva, Switzerland). Estimated age ranges based on the 3D‐CT images captured the true age of the individual at the time of the CT scan 79.5% of the time with good intra‐observer reliability. The features best visualized on the 3D images included the ossific nodule and the pubic symphyseal rim. This study shows that clinical CT scanning parameters are adequate for creating 3D images to be analyzed for age using the pubic symphysis.     

贵州省少数民族自治地方人口素质研究

了解贵州少数民族自治地方人口素质的现状,分析形成的原因,提出解决问题的措施,促进贵州省少数民族自治地方人口素质的提高。     

民族贫困地区开发过程中的人口素质问题研究--以海南中部为例

民族贫困地区开发面临的最大约束是人口素质问题.人口素质提高对民族贫困地区经济增长、缓解贫困,使人口与经济、资源、环境相互协调,可持续发展,具有非常关键的作用.本文以海南中部为例,实证分析民族贫困地区存在着人力资本投资不足及教育资源和卫生资源的配置效率欠佳问题,指出应通过加大教育投资的制度创新力度等措施,从根本上解决问题.     

Genetic variation of different Peruvian populations using 23 autosomal STR markers

In the present study the genetic variation of different Peruvian populations was investigated. The samples for this study were obtained from 669 individuals distributed among 11 populations from Peru. All samples were analyzed using 23 autosomal STR markers. The Arlequin v3.5.2.2 software was used to determine the genetic distances (Fst) of the studied populations. Notable population substructure was detected between some populations.     

人口年龄结构如何影响住房财富效应？——基于家庭微观视角的分析

人口年龄结构变动与高房价均为我国当前经济社会的重要特征，研究人口年龄结构对住房财富效应的影响对于房价调控、释放居民消费潜力具有较大的现实意义。基于中国家庭追踪调查(CFPS)数据，实证检验人口年龄结构对住房财富效应的影响，结果发现：老年抚养比和幼年抚养比升高显著增强了住房财富效应，且幼年抚养比升高对住房财富效应的影响更大；进一步，老年抚养比和幼年抚养比对拥有大产权房产家庭和低房价收入比家庭的住房财富效应有显著正向影响，但对拥有小产权房产家庭和高房价收入比家庭的影响不显著；并且，幼年抚养比对家庭住房财富效应的正向影响在高房价地区更为显著，老年抚养比对其的正向影响则在低房价区域更显著。     

SMART:自主研发的混合STR图谱分析系统

目的混合STR图谱的分析是法医遗传学领域的一个难题。目前国内大多数法医DNA实验室依靠人工方法分析混合STR图谱,费时费力,且拆分效果也多有主观性,难以满足日益增长的混合STR图谱分析的需求。本文介绍一套自主研发的混合STR图谱分析系统——SMART(STR Mixture Analysis and Resolution Tools),其能够实现对混合STR图谱的自动化分析,包括拆分混合STR图谱和计算似然比。方法SMART使用的STR峰高的概率模型,考虑了影子峰、降解、基因座特异性扩增效率、峰高变异、插入峰、峰丢失等因素。模型通过比较各个基因型集合拟合当前混合STR图谱的似然值大小来推断最有可能的基因型集合,采用了马尔可夫链蒙特卡洛(MCMC)算法进行求解。结果SMART可应用于不同试剂盒和遗传分析仪产生的数据。经使用ABI-3500XL遗传分析仪和Global Filer试剂盒测试,SMART能够实现对2~5人的混合STR图谱的分析,输出包括混合比例、混合图谱质量、各个贡献者单人的STR基因分型、似然比等多项结果。结论SMART作为一款自主研发的混合STR图谱分析系统,其基本涵盖了国外同类分析系统所具有的功能,技术性能指标达到国际先进水平,能够满足一线法医工作者对于混合STR图谱分析的多样化需求,提高混合STR图谱结果的利用率。     

Using PMCT of Individuals of Known Age to Test the Suchey–Brooks Method of Aging in Victoria,Australia

The estimation of an individual's age at death plays a critical role in the investigation of unidentified human remains. The Suchey–Brooks method, which involves the analysis of degenerative morphological changes in the pubic symphysis, is currently widely used to estimate age in adults. This study tested the applicability of the Suchey–Brooks method on a contemporary adult Australian (Victorian) subpopulation by observing three‐dimensional volume‐rendered postmortem computed tomographic (PMCT) reconstructions of the pubic symphysis of 204 individuals aged 15–100 years. Results showed the method was reliable for females (85% correct allocations) but not for males (67% correct allocations). It is therefore recommended that extreme caution be used when applying the Suchey–Brooks method for estimating age at death of an individual in this subpopulation from PMCT images. The results suggest further investigation into alternate age estimation methods is required.