The study of quartz and other silica systems under pressure is one the most prolific domains research over past 50 years because their applications in material science fundamental relevance to planetary interiors. characterization amorphous state essential for comprehension pressure-induced amorphization minerals, metamorphism observed shocked materials, melt structures pressure. Here, we measu...

To clarify the postulate that turbulence may produce ejection murmurs, point velocity and sound were measured in the ascending aorta of 13 subjects: six with normal aortic valves, six with aortic valvular disease, and one with a Bjork-Shiley prosthetic aortic valve. Velocity was measured with a catheter-tip hot film anemometer probe, and sound was measured with a catheter-tip micromanometer. Ej...