A degradation assembly has an attack tool with a body and a shank. The pneumatic tire includes a noise absorbing member of a porous material which is attached to an inner peripheral surface of the tire. An interface is provided for transferring hydrogen from the second hydrogen reservoir to a hydrogen reservoir in a portable device. The authors are then ranked according to an author selection policy that may specify any suitable criteria for ranking authors, including author selection criteria, author ranking criteria, author filtering criteria, and author backup criteria.