Characteristics of the Distance and Space Required for Knife Slashing Using a Motion Capture System

Autor: YUAN Shu-fang, LI Shang-xiao, YANG Chao-peng, NI Bin, GUO Wen-xia, SHI Yi, WANG Dong-mei, PAN Jia-hui, WANG Ming-zhi, HAO Wei-ya
Jazyk: čínština
Rok vydání: 2022
Předmět:
Zdroj: Fayixue Zazhi, Vol 38, Iss 6, Pp 702-708 (2022)
Druh dokumentu: article
ISSN: 1004-5619
DOI: 10.12116/j.issn.1004-5619.2021.411008
Popis: ObjectiveTo investigate the relationship between the perpetrator’s sex, victim’s position and slashing location as well as anthropometric parameters on distance and space required for slashing, to provide the theoretical basis for the judgment of whether the crime scene was consistent with the criminal activity space.MethodsThe kinematics data of 12 male and 12 female subjects slashing the neck of standing and supine mannequins as well as the chest of the standing mannequins with a kitchen knife were obtained by using a 3D motion capture system. The relationship between the perpetrator’s sex-victim’s position, the perpetrator’s sex-slashing location, and anthropometric parameters and the distance and space required for the slashing were analyzed by two-factor repeated measures ANOVA and Pearson correlation analysis respectively.ResultsCompared with slashing the neck of supine mannequins, the distance (L) and normalized L (l) of slashing the neck of standing mannequins were greater, while vertical distance (LVR) and normalized LVR (lVR) of the knife side were smaller. Compared with slashing the neck of standing mannequins, the L and l slashing the chest of standing mannequins were greater, while LVR and lVR were smaller. Horizontal distance (LHR) and normalized LHR (lHR) of the knife side in males were greater than that in females. Height and arm length were positively correlated with L, LHR, and LVR when striking the standing mannequins.ConclusionWhen slashing the neck of supine or standing victims, the slashing distance is shorter and the slashing height is greater. Furthermore, the distance and space required for slashing are correlate with anthropometric parameters.
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