Air defence systems protecting the US embassy compound in Baghdad were activated late Saturday after rockets were fired toward the heavily fortified Green Zone, according to Iraqi security officials.

Abstract: Conventional phased-array ultrasound can detect defects in nuts; however, accurately reconstructing their irregular shapes and precise spatial structures remains challenging. To faithfully ...

Abstract: With the continuous improvement of the communication frequency band, optical wireless communication (OWC) has attracted extensive attention. Due to the short wavelength and high directivity ...