Results 81 to 90 of about 38,940 (240)

Complementarity in alliances: How strategic compatibility and hierarchy promote efficient cooperation in international security

American Journal of Political Science, EarlyView.
Abstract How can defense alliances reap the efficiency gains of working together when coordination and opportunism costs are high? Although specializing as part of a collective comes with economic and functional benefits, states must bargain over the distribution of those gains and ensure the costs of collective action are minimized.
J. Andrés Gannon
wiley   +1 more source

Influence of surface polyurea coating on the ballistic performance of kevlar fabric

Heliyon
With the increasing lethality of modern weapons, the development of body armor has become increasingly important. The main objective of current research is to make protective gear lighter and increase material ballistic performance.
Xing Li, Mengqi Yuan, Chunyang Huang, Shaowu Wang   +3 more
doaj   +1 more source

Shadow epitaxy for in-situ growth of generic semiconductor/superconductor devices

, 2020
Uniform, defect-free crystal interfaces and surfaces are crucial ingredients for realizing high-performance nanoscale devices. A pertinent example is that advances in gate-tunable and topological superconductivity using semiconductor/superconductor ...
Aagesen, Martin, Bjergfelt, Martin, Carrad, Damon J., Fiordaliso, Elisabetta M., Jespersen, Thomas Sand, Johnson, Erik, Kanne, Thomas, Krizek, Filip, Nygård, Jesper   +8 more
core   +1 more source

Israel's Post‐War Healthcare Obligations

Bioethics, EarlyView.
ABSTRACT Since the beginning of the Israel–Hamas war in 2023, the healthcare infrastructure within Gaza has been dismantled. While international humanitarian law mandates distinction between lawful targets (combatants and military objectives) and non‐lawful targets (civilians and civilian objects), and acknowledging the inherent complexities of ...
Daniel J. Hurst, Christopher A. Bobier
wiley   +1 more source

Dynamic response of armor-piercing bullets to blunt and penetration with protective gelatin

Theoretical and Applied Mechanics Letters
To investigate the coupled damage mechanism of blunt impact and bullets penetration after penetrating ballistic plates against human body targets, experiments were conducted using 6.8 mm caliber armor-piercing bullets against gelatin targets with ...
Rui Yuan, Yaoke Wen, Weixiao Nie, Dongxu Liu, Zhouyu Shen, Haoran Xu   +5 more
doaj   +1 more source

Analysis ballistic impact modeling of multicomponent fabrics with jalaba structure

MATEC Web of Conferences, 2018
Various textile materials have been employed in the past for protection against the ballistic with only limited satisfaction without realizing in underlying mechanism of ballistic impact.
Subagyo Asmanto
doaj   +1 more source

Micro-Switches with Sputtered Au, AuPd, Au-on-AuPt, and AuPtCu Alloy Electric Contacts [PDF]

, 2004
This work is the first to report on a new analytic model for predicting micro-contact resistance and the design, fabrication, and testing of microelectromechanical systems (MEMS) metal contact switches with sputtered bi-metallic (i.e.
Cortez, R., Coutu, Ronald A., Jr., Crane, Robert L., Kladitis, P. E., Strawser, R. E.   +4 more
core   +1 more source

Static recrystallization of shocked calcite in Ries impact breccias

Meteoritics &Planetary Science, EarlyView.
Abstract Calcite is prone to chemical and microstructural modifications, especially after having been strained at high stresses and strain rates, as during hypervelocity impact events. These modifications include precipitation from pore fluid as well as replacement of strained volumes by recrystallization. In calcite aggregates of a metagranite breccia
Claudia A. Trepmann, Fabian Dellefant, Lina Seybold, Wolfgang W. Schmahl, Elena Sturm, Daniel Weidendorfer, Sandro Jahn, Iuliia V. Sleptsova, Stuart A. Gilder   +8 more
wiley   +1 more source

Mechanical Properties and Ballistic Performance for Different Coatings on HARDOX 450 Steel for Defense Applications

Crystals
The aim of the current study is to investigate the mechanical properties and ballistic performance of HARDOX 450 steel for defense applications in different conditions: uncoated, alumina-coated, and LINE X polyurea-coated.
Cosmin Nicolescu, Tudor Viorel Tiganescu, Aurora Antoniac, Ovidiu Iorga, Brandusa Ghiban, Alexandru Pascu, Alexandru Streza, Iulian Antoniac   +7 more
doaj   +1 more source

Influence of the vacuum resin process, on the ballistic behaviour of lightweight armouring solutions

EPJ Web of Conferences, 2012
The armour of vehicles against conventional threats is mainly composed with steel or aluminium panels. Efficient heavy solutions exist, but the involved industries require new lightweight structures.
Coutellier D., Boussu F., Lefebvre M., Vallee D.   +3 more
doaj   +1 more source