Trajectory of Blood Drops in an Experimental Model with the Use of a Firearm

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11510%2F17%3A10365050" target="_blank" >RIV/00216208:11510/17:10365050 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41310/17:73953

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Trajectory of Blood Drops in an Experimental Model with the Use of a Firearm

Popis výsledku v původním jazyce

Background: Blood marks analysis is a common technique used in forensics. However, current methods used have their limitations and deviations. The most commonly used trigonometric model is based on the linear movement of a blood drop, which disregards air resistance and gravitational force which affects all mass points in an area of space. Objective: The aim of this paper is to map the flight trajectory of blood drops in an experimental environment with the use of a firearm and to evaluate the option of replacing the real world flight trajectory by a more accurately definable parabolic approximation. Method: An experimental model was created which simulates the real world dispersion of blood in the case of firearm use. Blood samples with a volume of 100 ml were placed into a plastic bag and were shot at. For the purpose of the experiment was prepared wooden chamber (dimensions: 2 x 2 x 2 m). Plastic bags containing blood samples were hanged in the chamber and positioned into the chamber&apos;s center. Blood samples were shot at from a distance of two meters by a Taurus .357 magnum handgun. Magnum .357 FMJ ammunition was used. Each shot was recorded by a high speed camera under a 90° angle placed on the sample&apos;s level in a 2 m distance from the chamber. Conclusions: The outcome of these comparisons shows that the real world flight trajectory differs very little from the ballistic curve and parabolic approximation under the given experimental conditions. In crime reconstructions the angle of incidence (angle of impact) of a blood drop impacting a horizontal surface plays an important role. In this area the outcomes of the ballistic curve and the parabolic approximation are nearly

Název v anglickém jazyce

Trajectory of Blood Drops in an Experimental Model with the Use of a Firearm

Popis výsledku anglicky

Background: Blood marks analysis is a common technique used in forensics. However, current methods used have their limitations and deviations. The most commonly used trigonometric model is based on the linear movement of a blood drop, which disregards air resistance and gravitational force which affects all mass points in an area of space. Objective: The aim of this paper is to map the flight trajectory of blood drops in an experimental environment with the use of a firearm and to evaluate the option of replacing the real world flight trajectory by a more accurately definable parabolic approximation. Method: An experimental model was created which simulates the real world dispersion of blood in the case of firearm use. Blood samples with a volume of 100 ml were placed into a plastic bag and were shot at. For the purpose of the experiment was prepared wooden chamber (dimensions: 2 x 2 x 2 m). Plastic bags containing blood samples were hanged in the chamber and positioned into the chamber&apos;s center. Blood samples were shot at from a distance of two meters by a Taurus .357 magnum handgun. Magnum .357 FMJ ammunition was used. Each shot was recorded by a high speed camera under a 90° angle placed on the sample&apos;s level in a 2 m distance from the chamber. Conclusions: The outcome of these comparisons shows that the real world flight trajectory differs very little from the ballistic curve and parabolic approximation under the given experimental conditions. In crime reconstructions the angle of incidence (angle of impact) of a blood drop impacting a horizontal surface plays an important role. In this area the outcomes of the ballistic curve and the parabolic approximation are nearly

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

10102 - Applied mathematics

Projekt

<a href="/cs/project/GAP407%2F10%2F1624" target="_blank" >GAP407/10/1624: Identifikace limitních účinků hypokinetické enviromentální zátěže na spolehlivost senzomotorických reakcí člověka</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Indian Journal of Forensic Medicine and Toxicology [online]

ISSN

0973-9130

e-ISSN

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Svazek periodika

11

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

VE - Bolívarovská republika Venezuela

Počet stran výsledku

11

Strana od-do

239-249

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85008640882