Integrated electrolytic and chemical method for producing clean treated water having cyanide species concentration less than 1 mgliter. This makes it possible to acquire contrast information of image data at the field position of the objective lens sequentially as the field position moves with respect to the sample. The oxynitride layer is then annealed at a temperature of about 400\xb0 C. Depressed and raised portions on a surface of the rotor yoke facing the stator, except for the center portion, are arranged in a circumferential direction of the rotor yoke. The costs of system operation are less than electric systems because of the efficiencies and use of natural gas or propane. A computer receives a search query generated using the ontology and provides to a user of the computer at least one document in response to the query.