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).使用本数据集前，请先下载并解压其附带的压缩包，随后阅读该压缩包内提供的用户指南。 如该指南所述，本数据集旨在为负责优化、验证及/或复核犯罪现场纤维物证提取方法的人员提供助力。本数据集包含交互式绘图（interactive plots），汇总了斯塔福德郡大学（Staffordshire University）与沃里克郡暨西默西亚警察局（Warwickshire & West Mercia Police）联合开展的一项定量实验的主要研究成果，该实验作为ISO17020资质认定研究的一部分进行（Jones、Gwinnett与Jackson，2018）。本实验旨在探究四类因素对自粘胶带从多种表面上提取目标纤维的回收率的影响。 实验涉及的四类因素如下： • 胶带类型：本次测试了两款胶带品牌，分别为J-Lar与Crystal Tabs。 • 胶带储存温度：将两款胶带各取一卷，分别置于-5℃、19℃与35℃环境中储存，随后在19℃环境下开展纤维提取操作，且从控温环境取出至胶带使用的间隔时间尽可能缩短。 • 贴附方法：本次采用两种贴附方式，即分区法与单次法。其中分区法指每段胶带与目标表面的不同区域多次接触；单次法则指每段胶带仅与目标表面接触一次。 • 提取表面：共涵盖12种犯罪现场常见表面类型，分别为砖块、瓷砖、靠垫套、光面中密度纤维板（Glossed MDF）、牛仔裤、针织衫（Jumper，即毛衣）、长绒地毯、胶合板、安全带、短绒地毯、T恤与运动裤。 参考文献： Jones Z V、Gwinnett C、Jackson A R W（2018）。胶带类型、贴附方法与胶带储存温度对多种表面纤维提取率的影响：助力微量物证提取验证与优化的数据生成与分析示例。《司法科学（Science and Justice）》。DOI: 10.1016/j.scijus.2018.12.003，可从https://doi.org/10.1016/j.scijus.2018.12.003获取（2019年1月7日访问）。