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Daniel Kish (born 1966 in Montebello, California) [1] is an American expert in human echolocation and the President of World Access for the Blind (WAFTB), a California-registered nonprofit organization founded by Kish in 2000 to facilitate "the self-directed achievement of people with all forms of blindness" and increase public awareness about their strengths and capabilities. [2]
Principle of ultrasonic testing. LEFT: A probe sends a sound wave into a test material. There are two indications, one from the initial pulse of the probe, and the second due to the back wall echo. RIGHT: A defect creates the third indication and simultaneously reduces the amplitude of the back wall indication.
Sonographer doing an echocardiogram of a child Echocardiogram in the parasternal long-axis view, showing a measurement of the heart's left ventricle. Health societies recommend the use of echocardiography for initial diagnosis when a change in the patient's clinical status occurs and when new data from an echocardiogram would result in the physician changing the patient's care. [7]
MasterClass was founded by David Rogier while a student at Stanford University, originally under the name "Yanka Industries". [6] [7] Rogier, who continues to serve as chief executive officer (CEO), [8] asked Aaron Rasmussen to join the company as a co-founder and chief technology officer; Rasmussen would also serve as creative director, [9] before leaving in January 2017. [7]
Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water . It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight , along with knowledge of the speed of sound in water, allows determining the distance ...
Gradient echo is a magnetic resonance imaging (MRI) sequence that has wide variety of applications, from magnetic resonance angiography to perfusion MRI and diffusion ...
Echo II or Echo 2 or variant, may refer to: Echo II-class submarine of the Soviet Navy; Echo 2 (satellite), a 1964 NASA communications satellite;
Oprah's Master Class (or Oprah Presents: Master Class, as it was titled in the first season) is a primetime television program that airs on the Oprah Winfrey Network. The series premiered on the network's first day, January 1, 2011.
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