A circular economy involves maintaining manufactured products in circulation, distributing resource and environmental costs over time and with repeated use. In a linear supply chain, manufactured ...

Archaeologists have recently uncovered a massive circular formation in the Sahara Desert, sparking intrigue and speculation among historians and scientists. This discovery adds to the Sahara’s ...

Abstract: This paper primarily introduces the vortex wave radar based on a circular frequency diverse antenna (FDA) array and analyzes the research on the propagation distance and patterns of vortex ...