The sliding motion of objects is typically governed by their friction with the underlying surface. Compared to translational friction, however, rotational has received much less attention. Here, we experimentally and theoretically study depinning orientational dynamics two-dimensional colloidal crystalline clusters on periodically corrugated surfaces in presence magnetically exerted torques. We...

This paper reports a study into the dynamics of vibratory machine composed viscoelastically-fixed platform that can move vertically and two identical inertial vibration exciters. The exciters' bodies rotate at same angular velocities in opposite directions. host single load form ball, roller, or pendulum. loads' centers mass relative to circle with center on axis rotation. movements are hindere...

Spintronic terahertz emitters (STEs) are desirable broadband sources, but their limited signal strength has hindered practical application. By optimizing the photonic and thermal environment, authors present an STE that could overcome this obstacle. Benchmarking against state-of-the-art based on optical rectification, delivers strong pulses with comparable peak electric field fluence, offers ad...