About: http://webisa.webdatacommons.org/218605236

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	The comparison of BRDF (Bi-directional Reflectance Distribution Function) measurements made on the same system but at different times or days is a method of determining potential sample or system change.
http://www.w3.org/ns/prov#wasQuotedFrom	spiedigitallibrary.org