Multilayer graphene-gated carbon nanotube (CNT) emitters are introduced to novel vacuum-sealed x-ray tubes. We characterized field emission performances and electron-beam (Ebeam) converging of the ...

The vacuum tube high-speed flying train (high-speed flying train) is a novel rail transportation technology. The maglev train can run with low mechanical friction, low air resistance and low noise ...

A new Oxford study shows how physicists made light emerge from “nothing,” offering rare insight into the hidden energy of empty space.

The first underwater archaeological investigation, the oldest known analogue computer and the only scientific instrument that has survived from the Hellenistic era.