"a new, broader approach to tenure when considering public historians"

Public historians conduct history research and promote history in museums, parks, schools, nonprofit groups and elsewhere -- designing exhibits, overseeing archives and developing educational programs, all based on scholarship, but for a broader audience than scholars. As more history departments have created public history programs (in part because it is considered a growth area in which historians may find jobs), they have hired more public historians -- often creating tension over how to evaluate them.

To what degree are such public approaches available to academics in other fields and, perhaps more importantly, supported?