Abstract: This article tackles the problem of fixed-time attitude tracking control of rigid spacecrafts subject to unknown inertia and external disturbances. In particular, the approach focuses on ...

Digital twins have evolved from a theoretical concept to a critical operational asset in industries such as power, oil and gas, and mining. They provide a virtual representation of physical assets and ...

A clear science explanation breaks down how lightning forms and why it branches through the air instead of traveling in a straight line to the ground. No arrests yet as police are still investigating ...

Abstract: The polar coordinate system fast time-domain algorithm is more efficient than the original back-projection (BP) algorithm. However, it still has complex coordinate transformation and 2-D ...

This article features deals sourced directly by Gizmodo and produced independently of the editorial team. We may earn a commission when you buy through links on the site. Reading time 2 minutes It’s ...

The U.S. Postal Service is making new changes in 2026, including adjustments to the postmark process, which could result in late fees and penalties for anyone mailing time-sensitive documents such as ...