Abstract: This article addresses the velocity-free attitude control problem for rigid spacecraft with bounded external disturbances. To obtain an accurate estimate of the spacecraft's velocities and ...

Abstract: This brief addresses the fixed-time leader-following attitude consensus problem for multiple spacecraft systems on a directed graph. A distributed continuous observer is designed to estimate ...

Mothers lose out on more than £65,000 in earnings in the five years after having their first child, new figures show. By the time her child is five, a woman's monthly income is down by a whopping ...

Bitcoin surged past $126,000 to a new all-time high, driven by institutional inflows despite muted retail participation and heavy short liquidations. Corporate investments and ETF inflows suggest a ...

The Arizona Cardinals inexplicably blew a fourth-quarter lead, and it's time for a change after the embarrassing collapse against the Titans. It was a horrible Sunday afternoon for the Arizona ...

The government reviews show the country’s challenge as U.S. support wanes and Kyiv pivots to production from a domestic arms industry with a long history of corruption. By Andrew E. Kramer Reporting ...

Update: Prime Big Deal Days kicked off on Amazon today! We’re tracking all of the best deals live in our October Prime Day guide here. Well, folks, the unofficial kickoff to the holiday shopping ...

A bizarre sequence in the game between Florida and Texas in the fourth quarter confused the ESPN broadcast crew. And countless numbers of Gators fans watching the game. After a player lost his helmet ...