A terahertz (THz) wave transmitted through vegetation experiences both absorption and scattering caused by the air molecules leaves. This paper presents attenuation characteristics of in a THz range. The theoretical path loss model near yields average waves mixed channel composed Furthermore, simplified structure is obtained for generic types based on variety parameters, such as leaf size, dist...

The subsurface radar suffers from strong clutter from surface and severe wave attenuation in the underground. This paper presents a unique countermeasure to these problems using a polarimetric FM-CW radar equipped with equivalent time sensitivity control (STC) technique. We first apply the polarimetric filtering principle to suppress surface clutter, then, use an equivalent STC technique suited...

Abstract The dominant mechanism of P-wave attenuation in fluid-saturated rock is well known to be the pore-scale squirt. However, S-wave does not change average fluid pressure a pore and volume stays unchanged. As such, has distinctively different from P-wave. This paper attempts resolve mechanisms grainstones. first viscous boundary layer fracture, second acceleration plus real-number permeabi...

Coastal vegetation such as seagrass fields, salt marshes, and mangroves, contributes to coastal defence by damping incoming waves. Yet, plant species differ in flexibility due which they interact differently with waves damp a variable degree. Current wave models struggle balance accuracy against computational costs when accounting for wave-vegetation interactions. Instead, often rely on plant-s...