Abstract: Doppler mitigation method aided by reconfigurable intelligent surface (RIS) is essential for the high-speed rail (HSR) communications system, which, however, receives little attention. In ...

Abstract: Earlier studies and field tests have extensively investigated Long Range (LoRa) direct-to-satellite (DtS) communications, confirming the feasibility of integration with Low Earth Orbit (LEO) ...

Artificial intelligence is advancing at startling speed. The latest models can now complete complex, time-eating tasks with little human supervision. This month one of OpenAI’s models helped derive a ...

PROTECTING THE U.S. ECONOMY AND NATIONAL INTERESTS: Today, President Donald J. Trump signed a Proclamation imposing a temporary import duty to address fundamental international payments problems and ...