A system and method for issuing an alarm when the separation distance between a monitoring module associated with an object and an alert module exceeds a preset threshold distance thereby forming a leadless electronic tether between the object and the object owner. The method includes receiving information at a media access controller from a first set of one or more wireless uplink channels in response to bandwidth allocation map messages sent from the MAC and receiving information at the MAC from a second set of one or more wireless uplink channels in response to MAP messages sent by another MAC. A monitoring system includes a sensor component that is triggered under specified conditions, and the STB records events in response to the trigger, where a recorded event can be sent as a message to the UE. The conveying speed of the sheets is controlled such that a conveying time period over which a sheet preceding a final one of the sheets to be superimposed one upon another around the buffer roller is conveyed over a predetermined path section is shorter than a conveying time period over which the final one is conveyed over the predetermined path section. The fuel cell module includes a first thermoelectric converter and a second thermoelectric converter for performing thermoelectric conversion based on a temperature difference between the combustion gas and the oxygen-containing gas.