In this paper, penetration of high velocity impact of 4340 steel and tungsten carbide projectiles with specific shapes in to ceramic armor that includes 10 mm alumina (95%) is considered analytically and simulated with Ls-Dyna software. Bernoulli equation used to consider the penetration velocity in ceramics, shows that the penetration is better and easier by increasing projectile density. The ...

In this paper, a six-stage interactive model is presented for the perforation of metallic plates using blunt deformable projectiles when plastic wave propagation in both target and projectile is considered. In this analytical model, it is assumed that the projectile and target materials are rigid – plastic linear work hardened. The penetration of the projectile into the target is divided into s...

in this paper, the range doppler algorithm (rda) for synthetic aperture radar moving on a ballistic trajectory is presented. the 3-dimension acceleration and non-uniform trajectory cause decreases in efficiency of conventional imaging algorithms. in this paper, the analytical expression for the 2-d signal spectrum for ballistic trajectory using taylor series expansion and series reversion is de...

In order to design and optimize high-sensitivity silicon nanowire-field-effect transistor (SiNW FET) pressure sensors, this paper investigates the effects of channel orientations and the uniaxial stress on the ballistic hole transport properties of a strongly quantized SiNW FET placed near the high stress regions of the pressure sensors. A discrete stress-dependent six-band k.p method is used f...

This paper presents the ballistic limit for the non-filled aluminium tank. The main objective was to determine the ballistic limit for the front and rear wall of the tank. In the experiment study, the aluminium tank was 3 mm thick, 150 mm wide and 750 mm long. It was impacted by the fragment simulating projectile (FSP) with the velocity from 239 m/s up to 556 m/s. The numerical models were crea...

Performance limits of silicon MOSFETs are examined by a simple analytical theory augmented by self-consistent Schrödinger-Poisson simulations. The on-current, transconductance, and drain-to-source resistance in the ballistic limit (which corresponds to the channel length approaching zero) are examined. The ballistic transconductance in the limit that the oxide thickness approaches zero is also ...

Carbon nanotube (CNT) based transistors have been studied in recent years as potential alternatives to CMOS devices because of their capability of near ballistic transport. In this work the non-equilibrium Green’s function (NEGF) formalism is used to perform a comprehensive study of CNT based transistors. The effect of inelastic phonon scattering on the gate-delay time of CNT based transistors ...

We study the dynamics of Brownian particles in a heterogeneous one-dimensional medium with a spatially dependent diffusion coefficient of the form D(x)∼|x|^{c}, at constant temperature. The particle's probability distribution function (PDF) is calculated both analytically, by solving Fick's diffusion equation, and from numerical simulations of the underdamped Langevin equation. At long times, t...