A presence information system reports proximity presence status to presence subscribers. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The waste removal device also includes a third sheet made from an absorbent material that overlies the inner surface of the first sheet adjacent to the second sheet. Further, at least one of the yarns is provided as a bi-component metallic wire having an aluminum core and an outer layer of copper. In one embodiment, the bottom row seats are on a floor; and there is an imaginary horizontal plane that is parallel to the floor, and that at least a part of the top row seats and at least a part of the bottom row seats intersect.