Methods and systems consistent with the present invention track assets by collecting information from assets. The data structure may be established in a memory unit and may have a total number of N slots for entries. The combustion chamber may be further configured to receive, during normal operation, air at a second port near a top of the combustion chamber to support gasification of the column of biomass feedstock in a downward direction within the combustion chamber to provide syngas from the first port near the bottom of the combustion chamber. The method also includes assigning to each subgroup a respective alternate communication protocol for use by the plurality of endpoints of the subgroup. For that purpose, the hearing device has a surface formed with a shark skin structure. The cleaning member pivots from a cleaning position to an idle position and the print-head receptor module is pivotally fixed to a support member to allow the module to pivot from a printing position to a cleaning position.