Centro de Documentação da PJ
Monografia
 CD258 |
Bloodstain patterns on textile surfaces [Documento electrónico] : a fundamental analysis / Stephen Michielsen ..[et al.].- [Rockville, MD] : National Criminal Justice Reference Service (NCJRS), 2015.- 1 CD-ROM ; 12 cm
Research report submitted to the U.S. Department of Justice. NIJ Award nr. 2012-DN-BX-K052. Ficheiro de 11,2 MB em formato PDF (109 p.).
SANGUE, ANÁLISE DE VESTÍGIOS, FIBRA TÊXTIL, LOCAL DO CRIME
Table of contents. Abstract. Executive summary. I. Introduction. II. Methods. II.1 Fabric. II.2 Temperature of blood at impact. II.3 Synthetic blood. II.4 Viscosity of synthetic blood. II.5 Surface tension of synthetic blood. II.6 Ensuring that only a single drop of blood of known volume was dripped onto the fabric. II.7 Design and construction of Drop Tower. II.8 Fabric test parameters. II.9 Yarn characterization and properties. II.9.1 Yarn physical properties. II.9.2 Yarn wicking properties. II.10 Yarn and fabric morphology. II.11 Fabric wicking and drying of placed drops. II.12 Area, perimeter and circularity of drop on fabric. II.13 Transfer of blood from one fabric to another. II.14 Porcine blood drop breakup on fabric surfaces. II.15 Relative contributions of inertial and wicking forces. II.16 Spatter stains on fabric surfaces using porcine blood drops. II.17 Comparison of SB5 and porcine blood stains on fabric surfaces. III. Results. III.1 Fabric down selection. III.2 Laundering. III.3 Blood recipe development. III.4 Effect of different plain woven fabric construction. III.5 Determination of the minimum volume for complete penetration. III.6 Effect of drop volume on bloodstain pattern. III.7 Effect of drop height on bloodstain pattern. III.8 Time evolution of bloodstains and bloodstain patterns. III.9 Effect of warp angle on final bloodstain pattern for woven fabric. III.10 Effect of fabric inclination on final stain pattern for woven fabric. III.11 Combined effect of fabric inclination and warp orientation on final bloodstain. III.12 Fabric tautness on final bloodstain. III.13 Type of Fabric. III.14 Effect of backing material. III.15 Fabric defect on final bloodstain. III.16 Characterization of the yarns. III.17 Wicking behavior of the yarns. III.18 Morphological assessment of the yarns. III.19 Bloodstain area and circularity on single layer fabric. III.20 Growth of bloodstain area with time. III.21 Bloodstain drying on single layer fabric. III.22 Blood transfer from upper fabric to lower substrate (fabric or film). III.23 Porcine blood impacting onto fabric. III.24 Spreading and wicking of porcine blood impacting onto fabric from low heights. III.25 Spatter stains on fabric surfaces using porcine blood drops. III.26 Comparison of SB4 stains and porcine blood stains. III.27 Custom yarns and fabrics. IV. Conclusions. V. References. VI. Dissemination of research findings. VII. Appendix.