Atrial remodeling is a term introduced in 1995 to describe alterations in atrial structure or function. Atrial electrical remodeling is characterized by a reduction of refractory period and action potential duration, dispersion in refractoriness, and a reduction in conduction velocity of impulse propagation. Numerous animal and human studies have demonstrated that atrial electrical remodeling i...

Quadrature voltage-controlled oscillators (VCOs) with current-weight-average and voltage-weight-average phase-adjusting architectures are studied. The phase adjusting equalizes the oscillation frequency to LC-resonant frequency. merits of equalization explained by using Leeson's noise equation impulse sensitivity function (ISF). VCOs fabricated 180-nm TSMC CMOS show low-phase-noise performances...

Matched ltering and adaptive beamforming are both necessary for e cient speech dereverberation and noise reduction by microphone arrays. This can be achieved by the identi cation of impulse responses. In this contribution, we show that adaptive microphone arrays are sensitive to identi cation errors of impulse responses, particularly due to speaker movements. We prove that adjusted matchedlteri...

This paper treats the digital design of a probabilistic energy equalizer for impulse radio (IR) UWB receiver in high data rate (100 Mbps). The aim of this study is to bypass certain complex mathematical function as a chi-squared distribution and reduce the computational complexity of the equalizer for a low cost hardware implementation. As in Sub-MAP algorithm, the max operation is investigated...

Electrophysiological characteristics of individual aortic baroreceptors from normotensive rats (NTR) and spontaneously hypertensive rats (SHR) were compared. Impulse activity of afferent fibers was examined following the application of pressure steps to an in vitro aortic arch-aortic nerve preparation. Thirty-one fibers including seven unmyelinated fibers were studied completely over the range ...

BACKGROUND Liver biopsy is recommended as the gold standard method for assessing the stage of liver fibrosis in patients with chronic liver disease. However, it is invasive, with potential risks and complications. Elastography is an ultrasound technique that provides information of changes in the liver tissue, evaluating tissue elasticity and acoustic radiation force impulse is one of the avail...

Noise hides the important details of images. An efficient noise removal method is an important issue in image processing. Several filters have already been developed in fact special filter is designed to remove only one particular type of noise like Traditional median filter successfully remove the low density impulse noise but fail to remove the high density impulse noise. This paper consists ...