This paper investigates the interaction between the shear layer over a circular cavity and the flowexcited acoustic response of the volume to shear layer instability modes. Within the fluid-resonant category of cavity oscillation, most research has been carried out on rectangular geometries and where cylinders are considered, side branch and Helmholtz oscillators are most common. In these studi...

We explore the many-body phases of a two-dimensional Bose-Einstein condensate with cavity-mediated dynamic spin-orbit coupling. By help two transverse non-interfering, counterpropagating pump lasers and single standing-wave cavity mode, degenerate Zeeman sub-levels quantum gas are Raman coupled in double-$\Lambda$-configuration. Beyond critical strength mode is populated via coherent superradia...

Biomimetics is a school of design based on taking inspiration from nature to solve complex problems. This done with the assumption that natural world already has solutions many engineering problems have been refined through trial and error—an example constructal law. In this study, biomimicry used investigate impact shape an extended surface for mixed convection cooling within context cavity pr...

We model the advective Marangoni spreading of insoluble surfactant at free surface a viscous fluid that is confined within two-dimensional rectangular cavity. Interfacial deflections are assumed small, with contact lines pinned to walls cavity, and inertia neglected. Linearizing transport equation about equilibrium state allows modal decomposition dynamics, eigenvalues corresponding decay rates...

In the medical field, microwaves play a larger role for treatment than diagnosis. For the detection of diseases by microwave methods, it is essential to know the dielectric properties of biological materials. For the present study, a cavity perturbation technique was employed to determine the dielectric properties of these materials. Rectangular cavity resonators were used to measure the comple...

Experiments using active control to reduce oscillations in the flow past a rectangular cavity have uncovered surprising phenomena: in the controlled system, often new frequencies of oscillation appear, and often the main frequency of oscillation is split into two sideband frequencies. The goal of this paper is to explain these effects using physics-based models, and to use these ideas to guide ...

Three-dimensional instability modes of the periodic flow in a rectangular cavity driven by the harmonic sliding oscillation of its floor are explored experimentally. Theory for a cavity with infinite span predicts two synchronous modes and a quasiperiodic traveling-wave mode as primary transitions from two-dimensional to three-dimensional flow for different combinations of floor oscillation amp...

A 4-pole interdigital filter has been demonstrated at 60 GHz with a bandwidth of 10 %, it is made using micromachining and a multi-layer bonding. The filter is an airfilled three-dimensional structure. It is formed of five layers which are bonded together. Each layer is micromachined SU-8 based, 200-μm thick, and finished with 1.5 μm gold coating. The resonators are thick stripline-like and enc...

The reduction of backscatter radar cross section(RCS) in TE polarization for a rectangular cavity embedded in the ground plane is investigated in this paper. It is established by placing a thin, multilayered radar absorbing material(RAM) with possibly different permittivities at the bottom of the cavity. A minimization problem with respect to the backscatter RCS is formulated to determine the s...

We describe Dirofilaria immitis occurring in the peritoneal cavity of a dog from Korea. Two worms were found in the fat of the umbrical cord area during operation for an umbrical cord hernia in a dog (four year old, female, Maltese). In gross findings, the worms were slander white and measured 132 mm (female), 111 mm (male). The tail of the male was spirally coiled. In light microscopy, the ute...