A document processing device having an evaluation region disposed along a transport path between an input and output receptacle capable of processing both currency bills and barcoded media having at least two barcodes. The activity level detected by the body motion detection section is outputted to a fatigue detection section for estimating a user’s fatigue level on the basis of the activity level. The column decoder is adapted to receive an address of a memory cell to which data is to be written or from which data is to be read. The heating element is placed within the elongated slot and then connected to a suitable source of electricity so as to melt snow and ice which accumulates on or near the gutter cover. Alternatively, the downstream interleaver memory requirement may also be determined based on the upstream channel conditions by estimating the downstream capacity of the communication channel based on the upstream channel conditions and determining an interleaver buffer size that satisfies one or more predetermined downstream configuration parameters and the downstream capacity estimate. The new transistor consists of a laser or LED diode as drain or source, and a photo sensor diode as source or drain.