Intended is to unitize a clamp device for a rotation indexing apparatus for a machine tool, thereby facilitating the maintenance of the clamp device and the assembly of the indexing apparatus including the clamp device. Members of a social network who acquire the digital content item may identify interesting portions of the digital content. The latching portion includes a resisting portion for engaging the cover and a claw in front of the resisting portion and projecting toward a first direction. Also provided are copper damascene structures having an aspect ratio of greater than about 3 and a width of less than about 0. At least a part of the baffle may be positioned within a range of a length of the stator with respect to the axial direction of the motor axis. The apparatuses and methods provide an alternative to conventional respiration monitoring methods while enabling accurate yet minimally interruptive and invasive monitoring of respiration.