This contemporaneous illustration depicts women being hanged for witchcraft in Newcastle upon Tyne sometime between 1650 and 1662. The city was one of several locations where witch hunts and ...

Abstract: This paper studies the tracking control problem of an aerial manipulator that consists of a quadcopter flying base and a Delta robotic arm. We propose a novel control approach that consists ...

Mexican archaeologists excavating in the central square of the ancient Maya city of Kulubá identified a curious cubic stone with all the hallmarks of having served as a sacrificial altar. Cementing ...