An industrial computer includes a first casing, a second casing, a storage unit, a cover, and a heat dissipation unit. The method can include forming the nitride semiconductor crystal layer having a first thickness on a silicon crystal layer. Pre-determined valve characteristics for certain types of material are provided, each indicating the relation between flow rate and valve setting for one type of material. The liquid crystal compound has 4 or 5 benzene rings, one of which is a chlorofluorobenzene ring. This investigation is implemented in terms of whole sectional images, a threshold generation object detectable and background removal measure discriminates the background and the detected target object based on predetermined calculation procedure. The first electrode is covered, in part, by a first catalytically active material.