Rotation is a term that means.. speed over time-like running strength used in a physical action- like pushing off the starting blocks unchanging overtime- like balancing movement around a center point- like throwing

Investigator a has biological specimens that are coded and linked to identifiers of the source individuals. investigator a provides the specimens to investigator b but does not provide the individual identifiers. investigator b agrees not to re-identify the source individuals. is investigator b's research using the biospecimens human subjects research according to the definition of human subjects research in the federal regulations?