Abstract: Unmanned aerial vehicles (UAVs) have been demonstrated immense potentials to enhance communication systems tailored to the unique characteristics by optimizing the placement and mobility.

This is read by an automated voice. Please report any issues or inconsistencies here. Dozens of small earthquakes have shaken the San Francisco Bay Area over the last month, rattling nerves and ...

In Botswana, coexisting with the country's 130,000 elephants can be a daily negotiation. For rural families, tending a crop means hoping these "gentle giants" don't wander through and cause damage ...

Even telescopes far above Earth can’t avoid the contamination caused by commercial satellites. The findings are “truly frightening”, says Patrick Seitzer, an astronomer at the University of Michigan ...