This paper deals with the problem of estimating the state of charge (SOC) of lithium-ion batteries. Based on the analysis of the impedance spectra obtained by electrochemical impedance spectroscopy (EIS), a simplified battery impedance model is derived with the constant phase element (CPE). To interpret the impedance model, a fractional order calculus (FOC) method is introduced to model the CPE...

Introduction: Electrical impedance tomography (EIT) is a non-invasive technique utilized in various medical applications, including brain imaging and other neurological diseases. Recognizing the physiological and anatomical characteristics of organs based on their electrical properties is one of the main applications of EIT, as each variety of tissue structure has its own electrical characteris...

The realization of rapid, sensitive, and specific methods to detect foodborne pathogenic bacteria is central to implementing effective practice to ensure food safety and security. As a principle of transduction, the impedance technique has been applied in the field of microbiology as a means to detect and/or quantify foodborne pathogenic bacteria. The integration of impedance with biological re...

Intrinsic resistivity of any semiconductor silicon layer strongly depends on dopants and impurities concentrations. Structural properties, treating, coating, finishing etc. affect dynamic resistance behaviour a given p-n junction in wafer. It is important for massively used photovoltaics, optoelectronics, microelectronics, other solid-state electronics. In this work, efficient, universally appl...

We recorded a discrete 0.95 mV potential consistent with accessory atrioventricular pathway (AP) activation during serial electrophysiologic studies in a patient with Ebstein's anomaly and Wolff-Parkinson-White syndrome. Bipolar pacing from the catheter electrode in which the AP potential was recorded resulted in a stimulus-ventricle interval identical to the AP-ventricle interval during antegr...

An analog computer model has been developed to study the mechanism of the atrioventricular synchronization in one type of isorhythmic A-V dissociation (pattern I). The computer model simulates the following biological feedback control system: (1) the ventricular pacemaker frequency is independent of arterial blood pressure (analogous to artificial ventricular pacing); (2) the frequency of the a...

An analog computer model has been developed to study the mechanism of the atrioventricular synchronization in one type of isorhythmic A-V dissociation (pattern I). The computer model simulates the following biological feedback control system: (1) the ventricular pacemaker frequency is independent of arterial blood pressure (analogous to artificial ventricular pacing); (2) the frequency of the a...

Battery impedance is essential to the management of lithium-ion batteries for electric vehicles (EVs), and impedance characterization can help to monitor and predict the battery states. Many studies have been undertaken to investigate impedance characterization and the factors that influence impedance. However, few studies regarding the influence of the internal temperature gradient, which is c...

A series of animal experiments was conducted to characterize changes in the complex impedance of chronically implanted electrodes in neural tissue. Consistent trends in impedance changes were observed across all animals, characterized as a general increase in the measured impedance magnitude at 1 kHz. Impedance changes reach a peak approximately 7 days post-implant. Reactive responses around in...

Impedance spectra of the hydrogen evolution reaction, HER, at low cathodic overpotentials were analyzed on the basis of the theoretical admittance/frequency function, initially derived for the Volmer-Heyrovsky-Tafel reaction mechanism involving the hydrogen insertion (absorption + diffusion) step. General principles of the impedance spectroscopy for HER are discussed using schematically constru...