and the wave crests are the orthogonal trajectories of the system of rays 1. But it may not be generally realized that Hamilton's optical method, suitably generalized, can be used to treat a much ...

We aimed to assess prospectively the 5-year trajectories of left heart geometry, mechanics, and myocardial oxygen (O 2) demand after bariatric surgery. Left ventricular geometry, myocardial oxygen ...

© 2025 The Authors. Circulation: Heart Failure is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access ...

Abstract: This paper presents a passive multiple trajectories tracking system with multi-input multi-output orthogonal frequency division multiplexing (MIMO-OFDM) signals transmitted by the base ...

Abstract: Differential microphone arrays (DMAs) have garnered significant attention in recent research and development due to their high directivity and frequency-invariant beampatterns. However, DMAs ...