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Journal Article

Citation

Shaw KP, Chung JH, Chung FC, Tseng BY, Pan CH, Yang KT, Yang CP. J. Forensic Sci. 2011; 56(4): 967-971.

Affiliation

Department of Forensic Pathology, Institute of Forensic Medicine, Ministry of Justice, Taipei, Taiwan.

Copyright

(Copyright © 2011, American Society for Testing and Materials, Publisher John Wiley and Sons)

DOI

10.1111/j.1556-4029.2011.01741.x

PMID

21480893

Abstract

The characteristics of knife tool marks retained on hard tissues can be used to outline the shape and angle of a knife. The purpose of this study was to describe such marks on bone tissues that had been chopped with knives. A chopping stage with a gravity accelerator and a fixed bone platform was designed to reconstruct the chopping action. A digital microscope was also used to measure the knife angle (θ) and retained V-shape tool mark angle (ψ) in a pig skull. The κ value (elasticity coefficient; θ/ψ) was derived and recorded after the knife angle (θ) and the accompanied velocity were compared with the proportional impulsive force of the knife and ψ on the bone. The constant impulsive force revealed a correlation between the V-shape tool mark angle (ψ) and the elasticity coefficient (κ). These results describe the tool marks-crucial in the medicolegal investigation-of a knife on hard tissues.


Language: en

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