This paper investigates the possibility of converting vibrations to electricity. A numerical and an experimental study a magnetic levitation harvester are proposed. The system can be highly efficient when electrical parameters correctly tuned. Mechanical interaction is described by electromechanical coupling. Fixed value, linear nonlinear coupling models presented compared. It has been shown th...

In this paper, an analytical method is presented for the study of shear horizontal surface acoustic waves in semi-infinite piezoelectrics/metal superlattices. The results show that the high electromechanical coupling coefficient and wide usable frequency range can be obtained in these superlattices.

Background: The loss of effective atrial contraction is associated with an increased thromboembolic risk. Aim: To study the electromechanical coupling of the atria in patients with paroxysmal atrial fibrillation (time of occurrence of the episodes <48 hours) using pulsed-wave tissue Doppler imaging. Materials and methods: The study included 51 patients (26 men, 25 women; mean age 59.84±1.60 yea...

We aimed to assess the accuracy of Doppler tissue imaging (DTI) in detecting right ventricle (RV) dysfunction and electromechanical coupling alteration following pulmonary hypertension (PHT) in rat. PHT was induced by chronic hypoxia exposure (hypoxic PHT) or monocrotaline treatment (monocrotaline PHT). In both PHT models, we observed transparietal RV pressure increase and remodeling, including...

This paper reports a novel technique enabling to tune the resonant frequency of linear inertial piezoelectric energy harvesters through the control strategy of the associated electronic interface circuit. When associated with piezoelectric devices exhibiting high electromechanical coupling, it is expected to enable the variation of the resonant frequency in large proportions.

In this paper, the analytical solution of an electric and Volterra edge dislocation in a functionally graded piezoelectric (FGP) medium is obtained by means of complex Fourier transform. The system is subjected to in-plane mechanical and electrical loading. The material properties of the medium vary exponentially with coordinating parallel to the crack. In this study, the rate of the gradual ch...

Voltage-gated ion channels play a central role in the generation of action potentials in the nervous system. They are selective for one type of ion - sodium, calcium, or potassium. Voltage-gated ion channels are composed of a central pore that allows ions to pass through the membrane and four peripheral voltage sensing domains that respond to changes in the membrane potential. Upon depolarizati...

Electromechanical systems are integral to modern technologies and their accurate simulation is vital for understanding system behavior optimizing designs. ElectroM, a MATLAB-based open-source software tool, provides advanced capabilities simulating analyzing such systems, offering two types of coupling formulations between mechanical electrical domains, module obtaining dimensionless groups, en...