In this study, a polyamide/graphene oxide/polypyrrole nanofiber was fabricated with the aid of the electrospinning technique and applied in headspace solid phase microextraction. Characterization of the fabricated nanofiber was carried...
Electrocardiography is the method of choice for cardiac electrophysiological evaluation. Arrhythmia is one of the most crucial problems in cardiology. So far, many methods have been developed for arrhythmia detection, recognition and classification. A popular method is ECG modeling using a basis function (such as wavelet, hermite or RBF) and classifying the coefficients of the basis functions. We present a new method based on non-uniform sampling (selecting 7 samples) of ECG signal. It is shown that Left and Right Bundle Branch block arrhythmia as well as normal signals can be better analyzed using a newly introduced method called Finite Rate of Innovation (FRI) and other types of arrhythmia can be better analyzed based on spline modeling. Therefore, a multi-stage algorithm is proposed for diagnosing and compression of ECG signal which is faster and yet accurate.
Tinnitus is defined as "unwanted auditory perception of internal origin, usually localized, and rarely heard by others. Tinnitus is a sensibly experienced ringing sensation in the auditory system, which occurs without the presence of an actual auditory stimulation". Nowadays many researchers focused on finding a method for treatment of tinnitus. Although they report many different treatments, none of them are reported to be the certain cure of tinnitus. As tinnitus is caused by spontaneous activity of nerve fibers that sometimes its source cannot be detected, using means of electric stimulation for blocking auditory nerve fiber can be useful method for preventing tinnitus to be felt by patients. In this paper we focused on this point and tried to illustrate different aspects of that. First of all, we developed a computational model of fiber based on SEF fiber model. After we studied effects of different parameters such as wave shape, frequency, amplitude, fiber diameter and its distance from electrode, on experiment result and finally discussed result of computer simulation and come to conclusion.
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