The present invention provides a system and method for explicitly transmitting a block attribute in the data of a block. The method comprises preparing the single crystal or poly-crystalline wafers by mounting them and etching trenches into the wafers using one of several processes. The controller controls an operation state of the fuel cell during warm-up electric power generation on a basis of a correlation between the system loss required for warm-up of the fuel cell and a warm-up output required for driving of a load including the drive motor during warm-up of the fuel cell. Optionally, additional transducers are fixed along the tool to provide the orientation of the tool. A second LED string may also be coupled to the first LED string at an anode terminal of both LED strings.