More than two decades since the Concorde supersonic airliner last took to the skies, NASA has been flying an experimental aircraft designed to replace loud sonic booms with a quieter thump equivalent ...

gDepartment of Health Science and Technology, Aalborg University, Denmark hDepartment of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark ...

Abstract: The ultrasonic radar is a crucial part of the automatic parking system (APS) and requires thorough testing to ensure safety. The field operational test (FOT) is expensive and inefficient, ...

Abstract: Compactness, lightweight, and a simple structure are typical features of ultrasonic motors (USMs), but these features are often compromised by the addition of external sensors. Toward ...