United States, Aug. 21 -- NASA has selected four university teams to help the agency transform the future of aviation through projects ranging from high-supersonic propulsion systems to low-noise routes for small aircraft flying through cities.The agency made awards through its University Leadership Initiative, which offers student teams the opportunity to contribute to real-world flight research that advances NASA's goals in aeronautics.This year's awardees are pursuing projects that align with NASA strategic objectives, including innovation in commercial high-speed aircraft, the development of new tools that can lead to transformational aviation breakthroughs, safer and more efficient air traffic management, and the integration of new air...