The U.S. Drug Enforcement Administration warned Americans Tuesday that fentanyl is increasingly mixed with a dangerous array of synthetic substances that can limit the effectiveness of ...

New gun and drug prosecutions stalled. Several top prosecutors quit. Agents disappeared from drug task forces and gang cases.

Abstract: Two-dimensional (2D) direction-of-arrival (DOA) estimation using sparse arrays shows advantages in reducing hardware costs and enhancing degrees-of-freedom. However, most current studies ...

D carbon-based materials have rapidly evolved from scientific curiosities to essential building blocks for advanced materials engineering. Over the past ...

Abstract: We present a novel augmented reality (AR) display system utilizing a holographic optical element (HOE)-based approach, featuring seamless switching between three-dimensional (3D) and ...