An optionally heated boot includes an upper footwear portion and a lower footwear portion which is attached to the upper footwear portion. The waste toner container collects developer used for forming images and ejected from an image forming unit of the image forming apparatus as waste toner. The insert further includes at least one spacing and liquid-receiving sheet placed against the second surface of the support sheet. Tags respond to the interrogations with symbols that each represent one or more bits of data. In particular, the present invention provides a method in which the measurement of the accumulation rate is carried out by measuring a frequency of an energy release in a certain amount of time when the energy accumulated in the capacitor reaches the certain level and is then released. In addition to the foregoing, other related methodsystem aspects are described in the claims, drawings, and text forming a part of the present disclosure.