Supersonic air transport generates sonic booms that can affect people, animals and structures. There is a renewed interest in high-speed transport for civilian application. The widely used standard atmosphere for sonic boom prediction is neither capable of describing topographical variation, nor temporal variations, nor the impact of wind on the propagation of a sonic boom. However, within the ...

When focused ultrasound waves of moderate intensity in liquid encounter an air interface, a chain of drops emerges from the liquid surface to form what is known as a drop-chain fountain. Atomization, or the emission of micro-droplets, occurs when the acoustic intensity exceeds a liquid-dependent threshold. While the cavitation-wave hypothesis, which states that atomization arises from a combina...

The effect of different arsenic species (As2 or As4) on the quality of molecular beam epitaxy (MBE) grown GaNAsSb materials (samples A and B) and GaAs/ GaNAsSb/GaAs p + n n + devices (samples C and D) were investigated. The improvement in material quality in sample B, as well as the improvement in diode and solar cell characteristics in sample C, may suggest a successful defect density manipula...

A combustion synthesis methodology for the preparation of perovskite Li3xLa1/3-xTaO3 lithium-ion conductors with x = 0.033 is presented. Bulk ceramic specimens were sintered under combinations burial powder and cover crucibles to provide different lithium vapor overpressure conditions. maximum total ion conductivity 6 × 10-6 S cm-1 at room temperature was found pellet covered by a crucible whos...

Abstract The 79 CE eruption of Vesuvius is the first documented Plinian eruption, also famous for archaeological ruins Pompeii and Herculaneum. Although much known regarding dynamics magma reservoir, little about reservoir shape growth, related ground deformation. Numerical modelling by Finite Element Method was carried out, aimed at simulating growth deformation with respect to (prolate, spher...

The objective of this paper is to investigate the structural response of carbon fiber sandwich panels subjected to blast loading through an integrated experimental and numerical approach. A total of nine experiments, corresponding to three different blast intensity levels were conducted in the 28-inch square shock tube apparatus. Computational models were developed to capture the experimental d...