Fibre evidence retrieval optimisation

To use this dataset, download and extract the zip file that it contains, then read the user guide that is provided in that file.

As described in that guide, this dataset is intended to be helpful to those tasked with the optimisation, validation and/or verification of methods of fibre evidence recovery from crime scenes. It contains interactive plots which summarise the main findings of a quantitative experiment that was carried out by Staffordshire University in conjunction with Warwickshire & West Mercia Police as part of an ISO17020 accreditation study (Jones, Gwinnett and Jackson, 2018). This experiment was concerned with establishing the effect of four factors on target fibre retrieval rates achieved by self-adhesive tape from a range of surface types.

The factors were:
• Tape type. Two brands of tape were tested, namely J-Lar and Crystal Tabs.
• Tape storage temperature. One roll of each of the two tape types was kept at each of -5, 19 and 35 °C then used to retrieve target fibres at 19 °C with the minimum of delay between removal from the controlled temperature environment and deployment.
• Taping method. Two methods were used, namely zonal and 1 to 1. In the former, each piece of tape was contacted several times with different areas of the surface in question, whilst in the latter there was only one such contact per piece of tape used.
• The surface from which the target fibres were recovered. There were twelve of these, namely Brick, Ceramic tile, Cushion cover, Glossed MDF, Jeans, Jumper (i.e. a sweater), Long carpet, Plywood, Seatbelt, Short carpet, T-shirt and Tracksuit trousers, each commonly encountered in crime scenes.

Reference:

Jones, Z V, Gwinnett, C and Jackson, A R W (2018). The effect of tape type, taping method and tape storage temperature on the retrieval rate of fibres from various surfaces: An example of data generation and analysis to facilitate trace evidence recovery validation and optimisation. Science and Justice. DOI: 10.1016/j.scijus.2018.12.003, available from https://doi.org/10.1016/j.scijus.2018.12.003 (accessed 7 Jan 2019).

为使用本数据集，请下载并解压所包含的 zip 文件，随后阅读该文件中提供的用户指南。该指南详述了本数据集旨在辅助负责纤维证据从犯罪现场恢复方法之优化、验证及/或核实之专业人士。数据集内包含交互式图表，概述了斯塔福德郡大学与沃里克郡及西米德兰警察局合作进行的定量实验的主要发现。该实验作为一项 ISO17020 认证研究的一部分（Jones, Gwinnett and Jackson, 2018），旨在探究四种因素对使用自粘胶带从多种表面类型中实现目标纤维提取率的影响。这些因素包括：

• 胶带类型。测试了两种品牌的胶带，分别为 J-Lar 和 Crystal Tabs。
• 胶带储存温度。每种胶带类型各取一卷，分别储存于 -5、19 和 35 °C，然后在 19 °C 下以最短的时间差从控温环境中取出并用于提取目标纤维。
• 胶带粘贴方法。采用了两种方法，即区域粘贴和 1:1 粘贴。在前者中，每条胶带与待测表面的不同区域接触多次，而在后者中，每条胶带仅与表面接触一次。
• 目标纤维提取的表面类型。共有十二种，包括砖块、陶瓷瓷砖、垫套、抛光 MDF 板、牛仔裤、毛衣（即毛衣）、长地毯、胶合板、安全带、短地毯、T恤和运动裤，这些均在犯罪现场中常见。

参考文献：

Jones, Z V, Gwinnett, C and Jackson, A R W (2018). 胶带类型、粘贴方法及胶带储存温度对从各种表面纤维提取率的影响：数据生成与分析的案例，以促进痕迹证据恢复的验证与优化。科学司法。DOI: 10.1016/j.scijus.2018.12.003，可从 https://doi.org/10.1016/j.scijus.2018.12.003 获取（访问日期：2019年1月7日）。