Aberration and radiation pressure reflected by a moving mirror are examples of the Klein, one-way Doppler shift, and Poincaré, two-way Doppler shift, disc models of hyperbolic geometry, respectively. Aberration, like the Thomas precession, is related to the angular defect, and is a kinematical effect rather than relativistic. At the angle of parallelism, determined by a stationary observer look...

Eshelby has shown that a glide dislocation can move without radiation of energy at  2 p of the shear wave speed. It is also known that the same velocity plays a special role in shear crack propagation. This result has not received wide attention in the past due to lack of experiments and numerical simulations of transonic defects. Recent experiments on transonic shear fracture and molecular ...

Understanding the surface recombination property of semiconductor materials is beneficial for improving performance optoelectronic devices. In this paper, differential photocarrier radiometry (PCR) carried out to investigate evolution velocities silicon wafers induced by laser irradiation. The PCR signal and were found be strongly dependent on quality wafer duration native oxide was more suscep...

option of defect is one of common options between sale and rent contracts, however, it has special rules and conditions in those contracts. in the sale contracts, any defect in the sold or bought thing causes the victim has option of defect but in the rent contracts, only the defect creates option of defect that causes hardship in using of goods or reducing of benefits. in the sale, defect of s...

BACKGROUND Hemodynamics play an important role in the development and progression of carotid atherosclerosis, and may be important in the assessment of plaque vulnerability. The aim of this study was to develop a system to assess the hemodynamics of carotid atherosclerotic plaques using subject-specific fluid-structure interaction (FSI) models based on magnetic resonance imaging (MRI). MATERI...

Imaging techniques are high in demand for modern nondestructive evaluation of large-scale concrete structures. The travel-time tomography (TTT) technique, which is based on the principle of mapping the change of propagation velocity of transient elastic waves in a measured object, has found increasing application for assessing in situ concrete structures. The primary aim of this technique is to...

We are working to develop beating-heart atrial septal defect (ASD) closure techniques using real-time 3-D ultrasound guidance. The major image processing challenges are the low image quality and the high frame rate. This paper presents comparative results for ASD tracking in sequences of 3D cardiac ultrasound. We introduce a block flow technique, which combines the velocity computation from opt...

We consider a diffusive transport equation with discontinuous flux and prove the velocity averaging result under non-degeneracy conditions. In order to achieve result, we introduce new variant of micro-local defect functionals which are able ‘recognise’ changes type equation. As corollary, show existence weak solution for Cauchy problem non-linear degenerate parabolic flux. also strong traces a...