About: http://webisa.webdatacommons.org/111660193

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As the transmitted ultrasonic wave impinges upon flowing material such as blood cells, the movement of the flowing material will impart a Doppler shift to the returning echo signal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.de