For an improved cooling a fuel cell stack with cooling fins extending around the periphery of the stack, the section of the stack has a somewhat longitudinal shape. The document state storage unit stores document state information representing states concerning document validity of electronic documents stored in a document storage unit. The sales server, based upon received buyer input from an identified buyer via a buyer computer that includes buyer orders for the first product and the second product dispenses a first sales order to the first seller’s computer for the first product and a second sales order to the second seller’s computer for the second product. The micro-members are arranged on the surface of the substrate and parallel with the solid-state light emitting chip. Said molecules are also useful for detecting radiation, and thus for manufacturing radar, and industrial or medical dosimetry instruments. The chemisorbing and contacting are successively repeated under conditions effective to form a layer of material on the substrate comprising a conductive metal nitride.