Rupture Form of Bullet Hole in Military Suit According to Rifle Firing Distance and Angle

2021 ◽  
Vol 15 (3) ◽  
pp. 175-183
Author(s):  
Jin-Woo Mun ◽  
Young-Wook Yoon ◽  
Jong-hyuk Park ◽  
Dong-Min Lee ◽  
Chan-il Jeong ◽  
...  
Keyword(s):  
Firing Distance ◽  
Bullet Hole

scholarly journals Microfluidic Paper-based Analytical Device for Quantification of Lead Using Reaction Band-length for Identification of Bullet Hole and Its Potential for Estimating Firing Distance

2018 ◽  
Vol 34 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Supatana BUKING ◽  
Phoonthawee SAETEAR ◽  
Warawut TIYAPONGPATTANA ◽  
Kanchana URAISIN ◽  
Prapin WILAIRAT ◽  
...  
Keyword(s):  
Firing Distance ◽  
Analytical Device ◽  
Bullet Hole

Linguistic and object-based stance-taking in Appalachian interviews

2016 ◽  
Vol 45 (3) ◽  
pp. 331-351 ◽  
Author(s):  
Allison Burkette
Keyword(s):  
North Carolina ◽  
Civil War ◽  
Material Culture ◽  
Past Tense ◽  
Individual Identity ◽  
Appalachian English ◽  
Object Based ◽  
Western North Carolina ◽  
Civil War Era ◽  
Bullet Hole

AbstractThis article uses data from interviews conducted in western North Carolina in order to examine the ways in which speakers enact authoritative, evaluative, and interactional stances to construct individual identity. In this data, we find a subtle interplay between the content of explicit statements, narrative content, and the use of grammatical features associated with Appalachian English (e.g.a-prefixing, nonstandard past tense), and the use of physical artifacts as sources of stance-taking. This article focuses on two speakers' use of (present and not-present) physical artifacts (a placemat, a Civil War era sword, a lock of hair, and a piece of wood with a bullet hole in it) to enact stances that construct individual versions of an Appalachian identity. What this analysis suggests is that it is not just linguistic choices that contribute to stance enactment, but physical objects as well. (Sociolinguistics, stance-taking, Appalachian English, material culture, language and idenity)*

Side wind and tank speed influence on lateral displacement of the projectile

2021 ◽  
pp. 24-29
Author(s):  
M. Sorokatiy ◽  
M. Voytovych ◽  
L. Velychko ◽  
O. Moskalova
Keyword(s):  
Mathematical Model ◽  
Wind Speed ◽  
Lateral Displacement ◽  
Longitudinal Section ◽  
Projectile Velocity ◽  
Air Density ◽  
Dimensionless Coefficient ◽  
Air Resistance ◽  
The Difference ◽  
Firing Distance

This article indicates the scope of the formula for determining the magnitude of the lateral displacement of the projectile under the action of crosswind, which is used in the compilation of firing tables. This formula is valid under the following conditions: the force of frontal air resistance to the motion of the projectile is proportional to the its velocity squared; wind speed components are much smaller than the horizontal component of projectile velocity; the projectile velocity projections on the Oy and Oz axes are much smaller than the projections on the Ox axis; the dimensionless coefficient of resistance and the magnitude of the crosswind are constant values. However, in reality, the force of frontal air resistance to the motion of the projectile is only sometimes proportional to the its velocity squared; the projectile velocity projections on the Oz axis may be are much smaller than the projections on the Ox axis and may even be greater than it; the coefficient of resistance is depends on the value of the Makh number, so it can be considered constant only when shooting at short distances. The authors propose a mathematical model for determining the magnitude of the lateral displacement of the projectile under the action of crosswinds. It is believed that the force of the crosswind on the projectile depends on the following factors: air density; the maximum area of the longitudinal section of the projectile; the difference between the value of the lateral component of the wind speed and the speed of the lateral displacement of the projectile, which is raised to a certain power. The magnitude of the values of the lateral displacement of the projectile under the action of the crosswind when shooting at short distances, determined based on the proposed mathematical model, slightly differ from the values of the lateral displacement specified in the firing tables. However, with increasing firing distance, the difference between these values is constantly increasing and the value of the lateral displacement of the projectile determined theoretically is much larger than indicated in the firing tables. In addition, in this research the influence of the tank velocity on the value of the projectile lateral displacement taking into account the action of the crosswind is studied.

A New Field Kit for Bullet Hole Identification

1984 ◽  
Vol 29 (1) ◽  
pp. 11648J ◽  
Author(s):  
Menachem Steinberg ◽  
Yacov Leist ◽  
Menachem Tassa
Keyword(s):  
Bullet Hole

Direct Observation of Deformation Microstructures Surrounding a Bullet Hole in Stainless Steel Sheet

1969 ◽  
Vol 27 ◽  
pp. 192-193
Author(s):  
L. E. Murr ◽  
J. V. Foltz
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Steel Sheet ◽  
Thin Sheet ◽  
Residual Deformation ◽  
Stainless Steel Sheet ◽  
Residual Defect ◽  
Transmission Electron ◽  
Bullet Hole

Analytical treatments of high-velocity penetration and perforation of thin sheet materials invariably invoke numerous assumptions concerning the work-hardening qualities of the material, and the range and character of the residual deformation. However, with the inherent capability of transmission electron microscopy to accurately reveal the nature and extent of residual defect substructures associated with ballistic perforation, it is readily observed that a powerful-direct approach exists for the analysis of such related problems.

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