The mode-matching applications to scattering from circular and annular apertures in a thick perfectly conducting plane are reviewed. The Hankel and Weber transforms are utilized to solve the boundary-value problems of circular and annular apertures. Simple electrostatic problems are presented to illustrate the mode-matching method in terms of the Hankel and Weber transforms. Various types of We...

Mode selection of guided waves in an elastic steel plate with thick coating layer has been studied here. E€ect of both thick elastic coating and damping of the coating layer on the dispersion and mode shapes has been investigated and modes that are less a€ected by elastic coating and damping have been identi®ed. For modeling the viscoelastic behavior of the coating layer, the standard linear so...

Leak localization is essential for the safety and maintenance of storage vessels. This study proposes a novel circular acoustic emission sensor array to realize the continuous CO₂ leak localization from a circular hole on the surface of a large storage vessel in a carbon capture and storage system. Advantages of the proposed array are analyzed and compared with the common sparse arrays. Experim...

Theoretical analyses are presented for the stability of symmetric and asymmetric vortex pairs over slender conical wings and bodies under small perturbations in an inviscid incompressible flow at high angles of attack and sideslip. The three-dimensional problem of a pair of vortices over slender conical wings and bodies is reduced to a problem in two dimensions by using the conical flow assumpt...

[1] The shear tractions that mantle flow exerts on the base of Earth’s lithosphere contribute to plate-driving forces and lithospheric stresses. We investigate the sensitivity of these tractions to sub-lithospheric viscosity variations by comparing shear tractions computed from a mantle flow model featuring laterally-varying lithosphere and asthenosphere viscosity with those from a model with l...

The female reproductive organs of Sarcophaga ruficornis F. (Diptera: Sarcophagidae) consists of paired ovaries, lateral oviducts, a common oviduct, three spermathecae and paired accessory glands. Each ovary is formed of about 45-53 polytrophic ovarioles. The epithelium of lateral oviduct is formed of syncytial cells overlaid by longitudinal and circular muscle fibers. The common oviduct has syn...

The effect of thick carpet on the accuracy of bathroom scales was investigated using two analogue scales and two digital strain gauge scales. A mass range of 0Kg – 104Kg was used. Loading history was found to have a significant effect on analogue scales, and the experiments were designed with this in mind. The mean spring constant of a Hanson analogue scale system was found to be 12.13±0.30KNm;...