Dynamic Ratcheting (DR) is a nonlinear dynamic phenomenon occurring in hysteretic damping systems. It means the structural plastic deformation increases asymmetrically in successive cycles under an earthquake excitation. Although it is generally recognized that DR is closely related to the frequency contents of an earthquake excitation applied to thestructure, no targeted analysis has bee...

–In this paper a new dynamic phenomenon in nonlinear circuits driven by two sinusoidal signals is investigated. By exploiting state-space analysis, the paper shows that the application of signals with slightly different frequencies enables the phenomenon of chaotic beats to be obtained. Moreover, the power spectral density and the Lyapunov exponents are computed, with the aim of confirming the ...

asymptomatic after the unipolar lead was changed to a bipolar system. Monitoring artificial pacemaker function is an important application of ambulatory electrocardiography. Of 48 patients with suspected pacemaker malfunction reported by Iyengar et al., 24-hour monitoring detected failure in nine in whom routine examination, standard electrocardiograms, and pacemaker evaluation clinics failed t...

Numerous experiments have been conducted on plunging Eppler 361 airfoil in a subsonic wind tunnel. The experimental tests involved measuring the surface pressure distribution over the airfoil at Re=1.5×105. The airfoil was equipped with Gurney flap(heights of 2.6, 3.3 and 5% chord) and plunged at 6cm amplitude. The unsteady aerodynamic loads were calculated from the surface pressure measurement...

The characteristic relaxation time τ of protein hydration water exhibits a strong hydration level h dependence. The dynamic crossover is observed when h is higher than the monolayer hydration level hc=0.2-0.25 and becomes more visible as h increases. When h is lower than hc, τ only exhibits Arrhenius behavior in the measured temperature range. The activation energy of the Arrhenius behavior is ...