In order to control vehicle exhaust emission effectively, the conversion efficiency of catalytic converter is one of the key monitoring and evaluated indexes. The signal monitoring system of oxygen sensor is built by the TI2812 microcontroller. The method is to obtain the eigenvector and correlation coefficient of signal energy distribution, and to determine the two signal correlativity by usin...

BACKGROUND AND PURPOSE Arterial stiffening is associated with hypertension, stroke, and cognitive decline; however, the effects of aging and cardiovascular disease risk factors on carotid artery stiffening have not been assessed prospectively in a large multiethnic longitudinal study. METHODS Distensibility coefficient and the Young's elastic modulus (YEM) of the right common carotid artery w...

background: aging population and prevalence of diseases like cancer among them have affected general health of the elderly, so that one of the influential factors on health components of elderly patients with cancer is death anxiety, which has important consequences in them. methods: in this cross-sectional (descriptive correlational) study, 130 elderly patients with cancer undergoing chemother...

PURPOSE To investigate whether corneal wavefront aberrations vary with aging. METHODS One hundred two eyes of 102 normal subjects were evaluated with videokeratography. The data were decomposed using Taylor and Zernike polynomials to calculate the monochromatic aberrations of the cornea for both small (3-mm) and large (7-mm) pupils. RESULTS For a 3-mm pupil, the amount of total aberrations ...

Carbon nanotube (CNT) array thermal interface materials (TIMs) are promising candidates for high-performance applications in terms of performance. However, order to be useful commercial applications, the reliability interfaces is an equally important parameter, which so far has not been thoroughly investigated. In this study, CNT TIMs investigated through accelerated aging. The roles height and...