Forensic comparison of fired cartridge cases: Feature-extraction methods for feature-based calculation of likelihood ratios

Basu, Nabanita; Bolton-King, Rachel; Morrison, Geoffrey Stewart

doi:10.1016/j.fsisyn.2022.100272

Cited by 6 publications

(4 citation statements)

References 68 publications

(101 reference statements)

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“…Compared to DNA, new-paradigm knowledge and methods from forensic voice comparison, including statistical models and calibration and validation methods, should therefore be easier to transfer to and adapt for use other branches of forensic science. For an example of such transfer and adaptation, see Basu et al [ 47 ]. Forensic voice comparison is, however, a relatively niche branch of forensic science, which limits the extent to which developments in forensic voice comparison are noticed and adopted by researchers and practitioners in other branches of forensic science.…”

Section: A Paradigm Shift In Evaluation Of Forensic Evidencementioning

confidence: 99%

Advancing a paradigm shift in evaluation of forensic evidence: The rise of forensic data science

Morrison

2022

Forensic Science International: Synergy

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Section: A Paradigm Shift In Evaluation Of Forensic Evidencementioning

confidence: 99%

Advancing a paradigm shift in evaluation of forensic evidence: The rise of forensic data science

Morrison

2022

Forensic Science International: Synergy

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“…Finally, Basu et al [2] compared different feature-extraction methods for calculation of likelihood ratios from 3D digital images of fired cartridge cases fired approximately by 300 firearms of the same class. The comparison was made considering features extracted from only the firing-pin impression, from only the breech-face region, and from the entire cartridge case.…”

Section: Related Workmentioning

confidence: 99%

Assessing forensic ballistics three-dimensionally through graphical reconstruction and immersive VR observation

Guarnera

Giudice

Livatino

et al. 2022

Multimed Tools Appl

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A crime scene can provide valuable evidence critical to explain reason and modality of the occurred crime, and it can also lead to the arrest of criminals. The type of evidence collected by crime scene investigators or by law enforcement may accordingly effective involved cases. Bullets and cartridge cases examination is of paramount importance in forensic science because they may contain traces of microscopic striations, impressions and markings, which are unique and reproducible as “ballistic fingerprints”. The analysis of bullets and cartridge cases is a complicated and challenging process, typically based on optical comparison, leading to the identification of the employed firearm. New methods have recently been proposed for more accurate comparisons, which rely on three-dimensionally reconstructed data. This paper aims at further advancing recent methods by introducing a novel immersive technique for ballistics comparison by means of Virtual Reality. Users can three-dimensionally examine the cartridge cases shapes through intuitive natural gestures, from any vantage viewpoint (including internal iper-magnified views), while having at their disposal sets of visual aids which could not be easily implemented in desktop-based applications. A user study was conducted to assess viability and performance of our solution, which involved fourteen individuals acquainted with the standard procedures used by law enforcement agencies. Results clearly indicated that our approach lead to faster adaptation of users to the UI/UX and more accurate and explainable ballistics examination results.

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“…This is due to the distortion that occurs in the microstructure of the brass and also the lack of zinc (Zn) after being fired. More detailed research on bullet and sleeve standards has been carried out at the National Institute of Standards and Technology (NIST), United States [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Forging Process on Impact Strength in Brass Materials

Yusuf Siahaan,

Rakhmad A. Siregar,

Amru Siregar

et al. 2024

DISJOME

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Brass material which generally has low corrosion properties and low frictional forces is very suitable for use as a construction material, piping, ammunition sleeves, jewelry and household appliances. Knowledge of strengthening the mechanical properties of brass materials is needed. In this study, the brass material was forged so that it experienced a volume reduction of 44% at three forging temperatures namely room temperature (28°C), 350°C and 450°C. To observe the impact strength, the brass material specimens were tested using the Charpy Impact tester. The ratio of energy absorbed for forged and unwrought brass specimens was observed using linear regression. The results of physical observations of the fracture pattern show a complete fracture, and the form of a grained fracture. which can be classified as brittle.

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Forensic comparison of fired cartridge cases: Feature-extraction methods for feature-based calculation of likelihood ratios

Cited by 6 publications

References 68 publications

Advancing a paradigm shift in evaluation of forensic evidence: The rise of forensic data science

Advancing a paradigm shift in evaluation of forensic evidence: The rise of forensic data science

Assessing forensic ballistics three-dimensionally through graphical reconstruction and immersive VR observation

Effect of Forging Process on Impact Strength in Brass Materials

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