By James Michael Curran
Meant for forensic scientists and scholars of the self-discipline, Forensic Interpretation of Glass proof offers the practising forensic scientist with the required statistical instruments and technique to introduce forensic glass facts into the laboratory. With unfastened software program to be had for downloading on the author's website, scientists can observe their very own information and draw conclusions utilizing rules practiced within the text.
This publication includes an introductory bankruptcy on glass proof tactics and research earlier than masking themes corresponding to classical ways to dealing with glass facts, the applying of Bayesian information to forensic technology, and using histograms.
By offering either the actual and chemical examinations played on glass besides a steered interpretation, the writer permits readers the posh of getting all reference fabrics contained inside of a unmarried booklet. worthy for case-working forensic scientists, this booklet is perfect for college students of forensic technological know-how at either the undergraduate and graduate degrees, to boot somebody at present operating within the box
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Meant for forensic scientists and scholars of the self-discipline, Forensic Interpretation of Glass proof offers the practising forensic scientist with the required statistical instruments and method to introduce forensic glass proof into the laboratory. With unfastened software program to be had for downloading on the author's website, scientists can follow their very own facts and draw conclusions utilizing rules practiced within the textual content.
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Extra resources for Forensic Interpretation of Glass Evidence
The authors are aware of no laboratories applying this technique. 44 describe an annealing process where a speciﬁcally designed oven is used to anneal the small fragments typically recovered from clothing. Locke and Hayes45 report the results of this technique when applied to a number of different glass sources. 2 is a summary of Locke and Hayes ﬁndings; positive ∆RI values mean that the RI was higher after annealing. 2 suggests that tempered specimens can be differentiated from nontempered specimens.
No phase contrast has been used, suggesting the possibility of low precision. 6 Refractive index anomalies It has been known for some time that the ﬂoat surface of ﬂoat glass has a different RI to the bulk of the glass. Underhill42 describes the origin of the multiple RI phenomena. The ﬂoat surface is enriched in SnO2, and the opposite surface appears to be depleted in various other constituents and, consequently, enriched in SiO2. The ﬂoat surface typically has a lower RI to the bulk. 43 raised the exciting prospect that a separate ﬂoat RI might be measurable and, hence, an additional aspect of dis- ©2000 CRC Press LLC crimination might be available.
Gamble et al. 8 Density vs. S. collected between 1977 and 1990. ” This suggests that, despite the obvious correlation, these authors felt that there was still value in determining density if refractive index determination was also performed. Stoney and Thornton26 have shown that measuring both physical properties may or may not be useful depending on the error of the techniques. Improvements in equipment and method, however, have increased the advantage that refractive index determination has over density, and now very few laboratories perform both.