An extraordinarily rare, gravitationally lensed supernova may offer a powerful new way to measure the universe’s expansion rate.

For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe expanding right ...

That the universe is expanding has been known for almost a hundred years now, but how fast? The exact rate of that expansion ...

Abstract: The violent swaying of gangway when maintenance vessel dock at wind turbine tower poses a severe threaten to the safety of maintenance personnel. Therefore, ensuring the stable docking of ...

Abstract: This article proposes the design method of conductor considering ac resistance for high efficiency of permanent magnet synchronous motor (PMSM) using high fill factor winding. To achieve ...