Systems and methods for reconfiguring a transport-layer protocol are disclosed. The latch mechanism includes a housing adapted to be attached to the first structure and an actuator pivotally attached to the housing. On the channel layer, a barrier layer formed of a second group III nitride that contains at least In and Al and has a composition of Inx2Aly2Gaz2N is formed such that an In composition ratio of a near-surface portion is smaller than an In composition ratio of a portion other than the near-surface portion. The bench includes a torso support section to support a user’s torso, pivotally coupled to the support member, and configured for limited angular rotation about an axis parallel to at least a portion of the support member.