A push-pull oscillator topology that uses only one type of active device is proposed in this article. A magnetic transformer is leveraged to set positive feedback around a common-collector ...

Throughout aviation history, many aircraft have featured a push-pull engine configuration. Propeller-driven planes often rely on forward-mounted engines to pull them through the air. Some have engines ...

Headfirst’s patented SafeFit system is able to adapt to the rider’s head with a simple push; no adjustment dials are needed. Unlike other helmets where the shell shape doesn’t change but an internal ...

This paper presents a totally enclosed self-circulation (TESC) axial ventilation system (AVS) for large direct-drive permanent magnet synchronous machines (PMSMs). The configuration and the cooling ...

And the discovery that a majority of the universe is made up of "stuff" that makes gravity push rather than pull was a gamechanger, says Nobel laureate Brian Schmidt. The US-born Australian astronomer ...