Unexpected oscillation states in magnetic vortices could enable coupling across different physical systems

Researchers at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have uncovered previously unobserved oscillation ...

New model showcases microbubble behavior in viscoelastic fluid under ultrasound forcing

Encapsulated microbubbles (EMBs), tiny gas-filled bubbles coated in lipid or protein shells, play a central role in ...
IEEE

Reactive Power Hybrid Synchronization Control for Oscillatory Stability Enhancement of Grid-Connected Inverters Under Ultraweak Grids

Abstract: This article focuses on the oscillatory stability enhancement of grid-following (GFL) grid-connected inverters (GCIs) in ultraweak grids. The control links of the GFL-based GCI are first ...
IEEE

A Novel Resonant Frequency Tracking Control for Linear Oscillatory Machine Based on Variable Exponential Terminal Sliding Mode Observer

Abstract: For linear oscillatory machine (LOM), it is necessary to simultaneously implement the resonant frequency tracking and the position sensorless piston stroke control to obtain the maximum ...
thorax.bmj

Use of oscillatory positive expiratory pressure (OPEP) devices to augment sputum clearance in COPD: a systematic review and meta-analysis

Introduction Oscillating positive expiratory pressure (OPEP) devices are intended to facilitate sputum clearance in chronic obstructive pulmonary disease (COPD), but there is uncertainty as to their ...