Technically, the Loop’s construction began in 1978. But it wasn’t called the Loop then. If you’re unfamiliar, the Loop is a 131-mile trail that spans Tucson, South Tucson, Oro Valley and Marana.

Learn about sources of continued violence in the Democratic Republic of Congo and how the United Nations, African Union, and neighboring countries are struggling to curtail it.

This paper compares the system oscillation characteristics under strong and weak grid conditions with PMSG using open-loop control and current closed-loop control. By employing dynamic frequency ...

A control strategy for the active power decoupling in a single-phase full-bridge-based bidirectional dc–ac converter is proposed in this work. An ac-side auxiliary-circuit three-leg topology is used ...