We present a novel horn antenna to generate radio waves bearing Orbital Angular Momentum (OAM) by using a circular waveguide. The OAM mode ℓ = 1 is generated by using a spiral phase plate (SPP) inside ...

As such, all components within an aviation-related system must operate perfectly for everything to run smoothly.SummaryWhat ...

Axle-box bearing condition monitoring is important for the prognostics and health management (PHM) of high-speed trains. Temperature is an important indicator of the health of rotating machinery. It ...

For years the United States has led the world in national military spending, pouring trillions of dollars into cutting-edge ...