About: http://webisa.webdatacommons.org/408602093

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	Such pulses are not desirable when they have to be transmitted over a radio or other paths which cannot easily transmit direct current.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com