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首页> 外文学位 >Quantitative Blood Stain Analysis: Differentiation of Contact Transfer versus Spatter Stains on Fabric via Microscopic Inspection.
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Quantitative Blood Stain Analysis: Differentiation of Contact Transfer versus Spatter Stains on Fabric via Microscopic Inspection.

机译：定量血迹分析：通过显微镜检查区分织物上的接触转移与飞溅污渍。

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摘要

In crime scene reconstruction, it is often necessary to differentiate "contact transfer" and "spatter" bloodstain patterns found on clothing. Current methodologies, however, are qualitative and prone to context bias. In this work, we demonstrate that microscopic inspection of the stain orientations provides a quantitative differentiation of blood stains resulting from spatter versus contact transfer. Specifically, common knitted fabrics are comprised of parallel rows of left loop legs, in an upward diagonal orientation (/), and right loop legs in a downward diagonal orientation (). Our microscopic examinations of more than 65,000 individual stained loop legs show that spatter stains are approximately evenly distributed between left and right loop legs, but contact transfer stains are unevenly distributed: depending on the type of surface contacted, as many as 82% of the stains will be preferentially located on the left loop legs. We further show that in these fabrics the left loop legs protrude further out than the right loop legs by approximately 50 microns, indicating that the observation of left loop legs preferentially stained over right loop legs is associated with the topography of the fabric. These findings suggest that microscopic quantification of the relative loop leg stain distributions could provide an objective means of differentiating contact transfer versus spatter patterns in crime scene reconstruction.
机译：在犯罪现场的重建中，通常有必要区分衣服上发现的“接触转移”和“飞溅”血迹。但是，当前的方法是定性的，容易出现上下文偏差。在这项工作中，我们证明了染色方向的微观检查提供了飞溅和接触转移导致的血迹的定量区分。具体地，普通的针织物由平行的成排的左环腿在向上的对角线方向（/）和右环毛腿在向下的对角线方向（）。我们对超过65,000个单独的环形loop脚进行了显微镜检查，结果表明，飞溅的污渍大致均匀分布在左右环形legs脚之间，但是接触转移污渍的分布不均匀：取决于所接触表面的类型，多达82％的污渍将优先位于左循环腿上。我们进一步显示，在这些织物中，左环腿比右环腿进一步向外伸出约50微米，这表明观察到的左环腿优先于右环腿染色与织物的形貌有关。这些发现表明，相对定量环腿污迹分布的微观量化可以提供一种在犯罪现场重建中区分接触转移与飞溅样式的客观手段。

著录项

  • 作者

    Cho, Yuen Man.;

  • 作者单位

    University of California, Davis.;

  • 授予单位 University of California, Davis.;
  • 学科 Sociology Criminology and Penology.;Textile Technology.
  • 学位 M.S.
  • 年度 2014
  • 页码 25 p.
  • 总页数 25
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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