Investigations of diffusive-ballistic heat conduction of finite-length single-walled carbon nanotubes and nanographene ribbons at room temperature have been carried out by using nonequilibrium molecular dynamics simulations. The length dependences of thermal conductivity reveal the variation of the balance between ballistic and diffusive heat conduction. For both systems, the profile indicates ...

Composites are presently the most developing and particularly attractive special-purpose construction materials for ballistic applications, among others. They are the basic raw materials used in the production of composite ballistic shields, such as shrapnel and bullet-proof helmets, means of transport armour, bullet-proof shields, explosion protection, additional ballistic insets for shrapnel ...

BACKGROUND The theory of homeostatic metaplasticity has significant implications for human motor cortical plasticity and motor learning. Previous work has shown that the extent of recent effector use before exogenously-induced plasticity can affect the direction, magnitude and variability of aftereffects. However, the impact of recent effector use on motor learning and practice-dependent plasti...

Gregory Koblentz is a Junior Fellow with the Nuclear Non-Proliferation Project at the Carnegie Endowment for International Peace in Washington, D.C. The missile competition in South Asia is on the verge of a new and dangerous phase that threatens to disrupt the delicate strategic balance of the subcontinent. India and Pakistan already have stockpiles of ballistic missiles, along with the associ...

The attractiveness of both ballistic missiles and weapons of mass destruction (WMD) to various actors throughout the world represents a serious threat to U.S. security. These weapons and delivery systems are popular in part because they are highly visible symbols of military prowess. As such, they provide significant influence on regional balances of power, even among friends and allies. Furthe...

This project was based on the premise that decisions concerning the ballistic protection provided to defence personnel should derive from an evaluation of the balance between protection level and its impact on physiological function, mobility, and operational capability. Civilians and soldiers participated in laboratory- and field-based studies in which ensembles providing five levels of ballis...

BACKGROUND Lead-free hunting bullets are an alternative to lead-containing bullets which cause health risks for humans and endangered scavenging raptors through lead ingestion. However, doubts concerning the effectiveness of lead-free hunting bullets hinder the wide-spread acceptance in the hunting and wildlife management community. METHODS We performed terminal ballistic experiments under st...

This review covers studies dealing with simplified analytical models for ballistic penetration of an impactor into different solid media, namely, metals, soil, concrete, and composites at high speeds, but not at hypervelocities. The overview covers mainly papers that were published in the last decade, but not analyzed in previous reviews on impact dynamics. Both mathematical models and their en...

This paper presents the implementation of a three-dimensional dynamic code, for contact, impact, and penetration mechanics, based on the Meshless Local Petrov-Galerkin (MLPG) approach. In the current implementation, both velocities and velocity-gradients are interpolated independently, and their compatibility is enforced only at nodal points. As a result, the time consuming differentiations of ...