We study drag-driven instability in a protoplanetary disc consisting of a layer of single-sized dust particles which are coupled to the magnetized gas aerodynam
The gamma-ray burst GR170817A associated with GW170817 is subluminous and suben-ergetic compared with other typical short gamma-ray bursts. It may be due to a r
This paper proposes a dual-motor configuration to enhance closed-loop performance of a telescope control system. Two identical motors are mounted on each side o