Most primary accelerometer calibrations, or absolute calibrations, are currently performed using laser interferometry under the guideline of the international standard (ISO 16063-11, 1999). Due to rocking motion of vibration shakers, however, the measured accelerometer sensitivities at different laser incidence points can vary for up to a few percent. For the accurate determination of rocking m...

Motivated by the rocking motion of non-rigid structures during earthquakes, this paper investigates behaviour laterally flexible oscillators. Previous studies in area utilised ad hoc assumptions to consider transitions between different phases at impact. Some models explored direct two assuming that elastic translational velocities remain same, while others assumed dissipation all vertical mome...

BACKGROUND Super-responders to cardiac resynchronisation therapy (CRT) show an exceptional improvement in left ventricular ejection fraction (LVEF). Previous studies showed that apical rocking was independently associated with echocardiographic response to CRT. However, little is known about the association between apical rocking and super-response to CRT. OBJECTIVES To determine the independ...

This article presents a system identification analysis of a soil-structure interaction model with coupled horizontal and rocking response based on a combination of Fourier analysis, wave travel-time analysis, and a relationship between fixedbase, rigid-body, and system frequencies. The study provides insight into the coupling of the structural and soil vibrations useful for interpretation of se...

Abstract The Gaylord's oscillator is a vibrating of uniform rigid rod without slipping on circular surface with definite radius. dominant equation motion was the outcome strongly nonlinear pendulum second order. run article interested in obtaining frequency–amplitude and approximate solution by simpler approach. relationship derived terms Bessel function. Quasi-exact periodic depends non-pertur...

The non-smooth dynamics is investigated for an elastic planar metainterface composed by two layers of buckling elements, each one allowing motion on side only. Through the analogy between and unilateral contact assuming no-bouncing at impact, relevant degrees freedom system reduced to that a single degree governed piecewise-smooth differential equation. has strong similarities with rocking rigi...

30 cases of obstructing proximal ureteral stones at the level of L3-L5 which could not be pushed back into the pelvis and passed by a guide wire under epidural anesthesia, were removed percutaneously with the rigid ureteroscope. Multiple stones in one ureter, bilateral ureteral stones and a ureteral stone of a solitary kidney were removed successfully in one session showing the reliability...