A balloon-borne telescope has captured one of the most precise glimpses yet of the chaotic environment around a black hole.

Abstract: This paper presents a super-twisting sliding mode control strategy utilizing an adaptive extended state observer (AESO) for servo systems with nonlinear friction compensation to tackle the ...

Abstract: Brushless DC motor is widely used in industrial production and daily life. In order to meet the increasing requirements of motor control performance, sliding-mode control strategy is widely ...

Manchester United co-owner Sir Jim Ratcliffe has reportedly left some staff feeling ‘bemused’ as an ‘outburst’ has gone ‘down like a lead balloon’. Ratcliffe has faced heavy criticism since joining ...