A paper feeding apparatus is provided with a pressing arm that presses the separator to a paper feed roller, a document guide that has a pair of guide parts for pressing a document to the paper feed roller, and a spring part that applies spring force to the pressing arm and the document guide. The first transmitting terminal receives at least one message from the receiving terminal to establish the communication session. A method of assembling a telecommunications module and a method of assembling a telecommunications patch panel including one or more modules attached to the rear of a faceplate. A potential controller is coupled to the bit line, where the potential controller is configured to apply a third potential to the bit line, which is less than the first potential when writing the first information value to the memory element. The invention provides, further, improved methods and apparatus for workflow definition and processing which utilize workflow variables for communication of data and control information among tasks within a workflow. The water vaporizer can also include a first convoluted fin positioned along the second flow path, and a second convoluted fin positioned along the second flow path adjacent to and separated from the first fin to define a gap extending between the first and second fins along a length of the first fin in a direction substantially parallel to the exhaust flow along the third flow path.