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This state is usually called the Bunch–Davies vacuum or Euclidean vacuum, [1] actually was first obtained by N.A. Chernikov and E. A. Tagirov, in 1968 [2] and later by C. Schomblond and P. Spindel, in 1976, in the framework of a general discussion about invariant Green functions on de Sitter space. [3]
Davies' research interests are theoretical physics, cosmology and astrobiology; his research has been mainly in the area of quantum field theory in curved spacetime.His notable contributions are the so-called Fulling–Davies–Unruh effect, [4] according to which an observer accelerating through empty space will be subject to a bath of induced thermal radiation, and the Bunch–Davies vacuum ...
Elazer R. Edelman is an American engineer, scientist and cardiologist. He is the Edward J. Poitras Professor in Medical Engineering and Science at the Massachusetts Institute of Technology (MIT), Professor of Medicine at Harvard Medical School and at Brigham and Women's Hospital (BWH), and a practicing cardiologist at BWH.
Resonant ultrasound spectroscopy (RUS) is a laboratory technique used in geology and material science to measure fundamental material properties involving elasticity.This technique relies on the fact that solid objects have natural frequencies at which they vibrate when mechanically excited.
Synthetic aperture ultrasound (SAU) imaging is an advanced form of imaging technology used to form high-resolution images in biomedical ultrasound systems. Ultrasound imaging has become an important and popular medical imaging method, as it is safer and more economical than computer tomography (CT) and magnetic resonance imaging (MRI).
Schlieren imaging is a method to visualize density variations in transparent media. [1]Schlieren imaging of a focusing ultrasonic transducer Schlieren image sequence of a bullet traveling in free-flight, demonstrating the air pressure dynamics surrounding the bullet
A friendly-seeming couple lead Vincent Kartheiser down a mysterious path in the thriller 'Ultrasound.' Review: Short on suspense, 'Ultrasound' still captures fuzziness of contemporary memory Skip ...
The Unruh effect (also known as the Fulling–Davies–Unruh effect) is a theoretical prediction in quantum field theory that an observer who is uniformly accelerating through empty space will perceive a thermal bath. This means that even in the absence of any external heat sources, an accelerating observer will detect particles and experience ...