Results 41 to 50 of about 775 (177)

When does category spanning hurt or help producers?

Strategic Management Journal, Volume 47, Issue 7, Page 1907-1934, July 2026.
Abstract Research Summary Scholars have theorized many factors shaping whether category spanning helps or hurts producers. We first synthesize evidence by meta‐analyzing 25 years of empirical research, which reveals a null effect of spanning on average, yet with significant subsample heterogeneity. To unpack it, we theorize and find that spanning hurts
Jungsoo Ahn, Jean‐Philippe Vergne, Amanda Sharkey   +2 more
wiley   +1 more source

A Different Position: Protest Medicine and the Limits of Professional Neutrality

Sociology of Health &Illness, Volume 48, Issue 6, July 2026.
ABSTRACT Protests are a persistent feature of contemporary urban life, often producing mass injuries through police repression. Yet the role of medical care in these contexts—especially when provided by informal collectives—remains understudied. Drawing on 21 in‐depth interviews with members of volunteer medical brigades during Chile's 2019–2020 ...
Cristian Montenegro
wiley   +1 more source

Numerical Simulation of Ionospheric Disturbance Generated by Ballistic Missile

Advances in Mathematical Physics, 2019
To provide theoretical guidance for the detection of ballistic missiles by skywave over-the-horizon radar, this paper first analyses the best way to detect ballistic missiles based on the rocket detection mechanism.
Jinyuan Zhu, Hanxian Fang, Fan Xia, Tao Wan, Xiaolin Tan   +4 more
doaj   +1 more source

Europium‐ and dysprosium‐modified strontium aluminate: A luminescent marker system for enhanced gunshot residue detection

Journal of Forensic Sciences, Volume 71, Issue 4, Page 1607-1620, July 2026.
Abstract Forensic ballistics is essential in analyzing evidence from firearm use in criminal investigations, with gunshot residue (GSR) detection providing key information about the firearm and shooting conditions. Traditional methods like spectroscopy and scanning electron microscopy (SEM) have limitations in sensitivity, cost, and accessibility ...
Paulo Tonin, Cesar Aguzzoli, Sidnei Moura   +2 more
wiley   +1 more source

Modeling Of Ballistic Missile Dynamics

Tikrit Journal of Engineering Sciences, 2013
Aerodynamic modeling of ballistic missile in pitch plane is performed and the open-loop transfer function related to the jet deflector angle as input and pitch rate, normal acceleration as output has been derived with certain acceptable assumptions.
Salih Mahmoud Attiya
doaj  

A Study on Intercepting Highly Maneuvering Targets Using an Input Estimation Approach and Improved Particle Swarm Guidance Law

Aerospace
Ballistic missiles exhibit high velocities and rapid maneuverability after atmospheric reentry, posing substantial challenges for anti-ballistic missile (ABM) interception.
Yung-Lung Lee, Wan-Yu Yu
doaj   +1 more source

EUROPEAN MISSILE DEFENSE AS A NEW FORM OF INTERNATIONAL COOPERATION OF USA ON MISSILE DEFENSE

Vestnik MGIMO-Universiteta, 2013
This article examines U.S. efforts to build a broad international coalition in the area of missile defense. The basic formats of military cooperation with foreign countries in the deployment of the U.S.
E. A. Degtereva
doaj   +1 more source

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

American Journal of Political Science, Volume 70, Issue 3, Page 925-945, July 2026.
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

Kinetic Compensation of Barrel Launch Under High‐Speed Solid‐Phase Particulate Impacts

International Journal of Mechanical System Dynamics, Volume 6, Issue 2, Page 313-326, June 2026.
ABSTRACT An accurate launch‐dynamics computational method is critical for barrel weapon service life assessment and multiphase physics field refinement. Given the lack of studies on the solid‐phase buildup behavior at the projectile base, this paper provides an improved method for calculating the launching dynamics under high pressure and high speed ...
Zhiyi He, Guolai Yang, Quanzhao Sun, Shuli Li   +3 more
wiley   +1 more source

Trajectory optimization of a deflectable nose missile

Defence Technology, 2017
The deflectable nose missile has a longer range by deflecting its nose to improve its aerodynamic feature. Based on detached eddy simulation (DES), the supersonic flow fields of a missile with deflectable nose are simulated numerically and its ...
Zhi-yong Zhang, Qi-zhong Tang, Xiao-hui Sun, Zhi-hua Chen   +3 more
doaj   +1 more source