scholarly journals Comparative identificational characteristic of artificial leather with embossed surface damages caused by airgun pistol pellets with different head end forms

2021 ◽  
Vol 7 (1) ◽  
pp. 4-9
Author(s):  
Fedor V. Alyabyev ◽  
Olga A. Belousova ◽  
Nazariy P. Chesalov ◽  
Tatiana A. Lubina ◽  
Anna S. Sapega

Background: Authors of this article have made a comparative identificational description of artificial leather damage caused by air gun pistol pellets with different head end forms. Aim: This study aimed to provide a comparative identification characteristic of injuries caused by shots from an air pistol MP-53 M on artificial leather with a raised surface and a textile net glued to the wrong side at different angles and from different distances by bullets with different head end shapes (hemispherical, flat round, and conical). Used: Air pistol MP-53M, bullets with different head end shape, a fragment of black artificial leather with an embossed surface, and a textile mesh glued to the wrong side. Shots were fired at close range, 50 and 100 cm at angles of 30, 45, 60, and 90. The prevailing forms of damage (defects) of artificial skin, characteristic of bullets with a hemispherical, conical, and flat rounded head end, dependence of the form of damage (defect) on the distance of the shot, and the angle of entry of the bullet into the material. Conclusion: A comparative study showed that the form of damage to the material depends on the head end shape of bullets. Moreover, intragroup differences were found in the damage due to the distance of the shot and angle of entry of the bullet into the material in groups of bullets with the same head end shape.


Biomaterials ◽  
2001 ◽  
Vol 22 (20) ◽  
pp. 2777-2783 ◽  
Author(s):  
Sung Ran Hong ◽  
Seung Jun Lee ◽  
Jong Won Shim ◽  
Young Seon Choi ◽  
Young Moo Lee ◽  
...  




2012 ◽  
Vol 214 (1-3) ◽  
pp. 148-151 ◽  
Author(s):  
Vinay R. Hallikeri ◽  
Hareesh S. Gouda ◽  
Shivanand A. Kadagoudar


2013 ◽  
Vol 34 (8) ◽  
pp. 2814-2828 ◽  
Author(s):  
Sharmistha Swain ◽  
Brian D. Wardlow ◽  
Sunil Narumalani ◽  
Donald C. Rundquist ◽  
Michael J. Hayes


Geophysics ◽  
2014 ◽  
Vol 79 (2) ◽  
pp. P1-P7 ◽  
Author(s):  
Daniel Barker ◽  
Martin Landrø

We evaluated the problem of modeling the decay of the primary pulse amplitudes of air-gun clusters caused by the traditional assumption of sphericality. This was done by generalizing the Rayleigh equation to work with arbitrary bubble shapes, while retaining the assumption of incompressibility. To approximate the coalescence of the bubbles, we let the shapes be isosurfaces of the velocity potential. With this method, it is possible to model the firing of clustered air guns at any separation distance, including small distances that would cause two spherical bubbles to overlap. In this way, we obtained results matching the relative decay shown to be present for air-gun clusters. In addition, this method also allowed a way of calibrating the model such that effects created by the presence of the gun, compared to just a single spherical air bubble, may be estimated and included.



2020 ◽  
Author(s):  
Bruno Oliveira Ferreira de Souza ◽  
Éve‐Marie Frigon ◽  
Robert Tremblay‐Laliberté ◽  
Christian Casanova ◽  
Denis Boire


2001 ◽  
Vol 268 (6) ◽  
pp. 1739-1748
Author(s):  
Aitor Hierro ◽  
Jesus M. Arizmendi ◽  
Javier De Las Rivas ◽  
M. Angeles Urbaneja ◽  
Adelina Prado ◽  
...  


2001 ◽  
Vol 48 (2) ◽  
pp. 97-106 ◽  
Author(s):  
D. Martin ◽  
A. Arjona ◽  
I. Soto ◽  
N. Barquero ◽  
M. Viana ◽  
...  


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