We investigate the shear-horizontal surface acoustic waves ~SH-SAWs! generated on an AlN/Al2O3 microstructure by laser-micromachined grooves on the AlN film. In the absence of grooves, the AlN/Al2O3 device shows resonance for only a lower velocity SAW mode. However, when grooves of periodicity smaller than half the wavelength of the surface acoustic wave are micromachined, a higher velocity res...

Structural health monitoring (SHM) is emerging as an essential tool for constant monitoring of safety-critical engineering components. Ultrasonic guided waves stand out because of their ability to propagate over long distances and because they can offer good estimates of location, severity, and type of damage. The unique properties of the fundamental shear horizontal guided wave (SH₀) mode have...

Introduction: Large-scale, extratropical weather disturbances (i.e., highand low-pressure systems or “transient synoptic-period baroclinic/barotropic waves”) are critical components of the global (i.e., general) circulation of a rapidly rotating, differentially heated, shallow atmosphere such as on Earth and Mars. Critically, these wave-like disturbances act as agents for the transport of heat ...

Abstract Background Cerebral hypoperfusion is implicated as a cause of orthostatic symptoms such dizziness and light-headedness. In older adults, Orthostatic Hypotension (OH) may co-exist with Supine Hypertension (SH), greater cerebral dysfunction being reported in those SH-OH. It remains unclear whether are indicative higher hypotensive burden adults. This study assessed oxygenation cohort adu...

This study investigates the relative role of land surface schemes (LSS) in Weather Research and Forecasting (WRF) model, Version 4, to simulate heat wave events Karachi, Pakistan during 16–23 May 2018. The efficiency WRF model was evaluated forecasting over Karachi using three different LSS, namely NOAH, NOAH-MP, RUC. In addition this we have used longwave (RRTM) shortwave (Dudhia) all schemes....