Abstract Optical feedback is a powerful technique to stabilise and narrow semi-conductor lasers. As step forward for field deployable, ultra-stable yet tunable sources, we analyse model the opto-mechanical design of V-shaped cavity optical (VCOF) reference cavity. We estimate relative contributions sources external disturbance on resonance frequency cavity, ultimately define minimal thermal mec...

INTRODUCTION Constuction of the obturator prostheses and providing the patient's comfort with them are very difficult. Primary and the most important stage for these prostheses is to perform a proper impression. CASE PRESENTATION A 55-year-old edentulous Turkish female patient with a congenitally maxillary defect was rehabilitated with an open hollow obturator prosthesis. After the preliminar...

A new technique to evaluate the dielectric constant and loss factor of a homogeneous dielectric material using rectangular shaped perturb cavity has been developed. The values of S-parameters are measured experimentally by placing the sample in the center of the cavity resonator. Sample under test is fabricated in the form of a cylinder. The real and imaginary part of the permittivity can be th...

Electron microscopical studies reveal that the phasmids of Scutellonema brachyurum include socket and sheath cells which appear to be secretory. The phasmid includes an external cup-shaped ampulla filled with electron-dense material which may be lipopolysaccharide. The ampulla is continuous, with a receptor cavity surrounded by the socket and sheath cells. The dendrite receptor originates from ...

The problem of transient natural convection in a cube-shaped cavity is investigated experimentally and numerically. The motion is driven by a sudden temperature difference applied to two opposite side walls of the vessel. The experiments are performed at a Rayleigh number of 1.66 · 10 and a Prandtl number of 1109, inside a 5 · 5 · 5cm cavity made of plexiglas, with two isothermal copper walls k...

In this report, we investigate a photonic crystal circular-shaped microcavity (removing seven air holes) sustaining whispering-gallery mode (WGM) by shifting the 12 nearest air holes according to the concept of cavity-shaping in micro-disk and micro-gear lasers. The WGM modal characteristics are investigated by three-dimensional (3D) finite-difference time-domain (FDTD) simulations. From well-f...

We report a spontaneous embryonal rhabdomyosarcoma in the abdominal cavity of an aged (88-week-old) Sprague-Dawley rat. The animal had a firm lobulated 5 × 5 × 4.5 cm mass in the abdominal cavity that was whitish to tan with necrotic and hemorrhagic plaques. Microscopically, the mass contained nodules with spindle or globoid shaped neoplastic cells with abundant eosinophilic cytoplasm and round...

We describe a technique for repairing the ventricular septal perforation 10 days post acute anteroseptal myocardial infarction using the modi®ed infarction exclusion method. The repair involves endoventricular circular patch plasty and application of gelatin±resorcinol± formaldehyde biological glue in the space between a Te ̄on felt patch on the infarcted septum and a bovine pericardial patch in...