The suit comes a day after a judge in Philadelphia ordered the National Park Service to restore an exhibit about slaves owned ...

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Abstract: This article presents a wideband ultra-compact transformer-based lumped coupler that offers an arbitrary phase difference and power division ratio (PDR) between the two output ports, while ...

Abstract: Space object uncertainty propagation is critical to space situational awareness. However, due to a large number of space objects and limited available sensors, observations of a certain ...