Enhancing the evidential value of textile fibres: Part 1: Development of a spectral database and evaluative comparison strategy
MetadataShow full item record
© 2018 Elsevier B.V. In numerous major crime cases undertaken at our laboratory the recovery of large numbers of fibres ( > 1000), particularly in cases with no known source, presented several challenges. These included the inability to effectively manage the data (i.e. combination of MSP spectra, microscopic characteristics, composition, etc.) and perform comparisons in an efficient manner. To address these challenges, and in response to a growing need for performing fibre comparisons, we developed a database of textile fibre microspectrophotometric (MSP) spectra. The database, designed to compare MSP spectra using a modified Pearson method of correlation, currently contains over 20,000 normalised and first derivative spectra of casework, validation and reference textile fibres. A comparison strategy for cases with a large number of questioned samples was devised, involving identification of critical fibres in the casework data set, development of preliminary fibre groups classified according to their corresponding/similar MSP spectra, and verification of the preliminary groups via brightfield and fluorescence comparison microscopy. The database has successfully been utilised for proficiency trials and casework with small questioned fibre sets. Furthermore, in a case involving a larger dataset ( > 4000 “unknown” fibres) the database assisted in the efficient classification of 156 distinct groups of interest, highlighting its utility in providing investigative leads for the identification of potential sources of the recovered fibres.
Showing items related by title, author, creator and subject.
Sudarisman (2009)The flexural behaviour of three different hybrid fibre-reinforced polymer (FRP) matrix composites, i.e. S2-glass/E-glass/epoxy, TR50S carbon/IM7 carbon/epoxy, and E-glass/TR50S carbon/epoxy hybrid FRP composites, has been ...
Shaikh, Faiz; Taweel, M. (2016)This paper presents the effects of elevated temperatures of 400°C and 800°C on the residualcompressive strength and failure behaviour of fibre reinforced concretes and comparison is made with thatof unreinforced control ...
Tetracycline hydrochloride (TCH)-loaded drug carrier based on PLA:PCL nanofibre mats: experimental characterisation and release kinetics modellingHaroosh, Hazim Jasim Mohammed; Dong, Yu; Lau, K. (2014)The experimental characterisation of electrospun poly(lactic acid) (PLA): poly(e-caprolactone) (PCL) as drug carriers, at five blend ratios from 1:0, 3:1, 1:1, 1:3 and 0:1, was holistically investigated in terms of their ...