Results 21 to 30 of about 7,177 (282)

Optimal control of propellant consumption during vertical lifting of rocket in homogeneous atmosphere using regularized solution of integral equation of the first kind [PDF]

open access: yesINCAS Bulletin, 2020
The article is devoted to the study of the optimal control of propellant consumption during vertical lifting of rocket in homogeneous atmosphere using regularized solution of integral equation of the first kind.
Aleksey G. VIKULOV
doaj   +1 more source

Comparative analysis of different types of ballistic barrels used in the ammunition researches [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2021
Manufacturers offer different types of ballistic barrels made in according to various standards. The paper presents comparison of three types of ballistic barrels: pressure, velocity and accuracy made according to C.I.P.
Dawid Goździk   +2 more
doaj   +1 more source

Computational Evaluation of Assembly Technique Influence on Ballistic Performance of a Bullet – Non-linear Relation Between Méplat Size and the Drag Coefficient

open access: yesTechnologia i Automatyzacja Montażu, 2023
The continuous development of production and assembly techniques gives rise to the idea of followinga new approachin the small-arms ammunition design process.
Krzysztof Piasta   +2 more
doaj   +1 more source

USE OF SODIUM RHODIZONATE IN FIREARM USE CASES: CAN IT BE USEFUL IN IDENTIFYING THE SHOOTER? [PDF]

open access: yesEuromediterranean Biomedical Journal, 2023
The sodium rhodizonate test is a simple colorimetric technique used to identify traces of lead and barium. A positive test provides rapid and photographically documentable results for shots fired at distances not exceeding 50 cm.
Benedetta Pia De Luca
doaj   +1 more source

Smart membrane absorbing electromagnetic waves based on polyvinyl chloride/graphene composites

open access: yesMaterials Research Express, 2022
The rapid proliferation and intensive use of electronic devices have led to an increase in electronic pollution, such as electronic noise, electromagnetic interference (EMI), and radiofrequency interference (RFI), which cause malfunctions of electronic ...
Sabrina Bouriche   +7 more
doaj   +1 more source

Pronking and bounding allow a fast escape across a grassland populated by scattered obstacles

open access: yesRoyal Society Open Science, 2023
Some quadrupeds have evolved the ability of pronking, which consists in leaping by extending the four limbs simultaneously. Pronking is typically observed in some ungulate species inhabiting grassland populated by obstacles such as shrubs, rocks and ...
Francesco Righini   +3 more
doaj   +1 more source

Explicit form of the “modified point mass trajectory model” for the use in Fire Control Systems [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2020
The main objective of this article is to obtain equations of motion of the spin–stabilized projectile in the presence of non–constant wind. Introducing models allowing utilization of inhomogeneous wind is dictated by new possibilities created by the use ...
L. Baranowski, P. Majewski, J. Szymonik
doaj   +1 more source

Numerical evaluation of an autofrettaged thick-walled cylinder under dynamically applied axially non-uniform internal service pressure distribution

open access: yesDefence Technology, 2018
A dynamical moving pressure structural numerical calculation model using the internal ballistics calculation pressure-time results was constituted and the vicinity of the internal ballistics and quasi-internal ballistics structural model was checked. The
Onur Güngör, Veli Çelik
doaj   +1 more source

Cylindro-Conical Mild Steel Projectile Impact on E-Glass Fiber Reinforced Laminated Composite Plate Including Delamination Analysis

open access: yesEuropean Mechanical Science, 2021
Computational impact analysis of an E-glass fiber reinforced laminated composite structure with a conical nose shaped projectile is performed including delamination analysis.
Hande Yavuz
doaj   +1 more source

Comparisons of internal ballistics simulations of the AGARD gun

open access: yes, 2022
S.338-345Organisations from France, Germany and the UK are participating in a EUROPA Technical Arrangement (TA) research programme on Ignition Phenomena.
Hensel, D.   +7 more
core   +1 more source

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