Abstract: A collation unit checks the presence/absence of alteration of all files when an apparatus is started. A cyclic collation unit checks the presence/absence of alteration of a predetermined file at predetermined time intervals during the operation of the apparatus.

Abstract: A tampering detection device includes tampering detection circuitry configured to acquire an access frequency of a monitoring target file, calculate a number of times of scanning in a scan pattern for each monitoring target file on a basis of the access frequency acquired, and determine the scan pattern on a basis of the number of times of scanning calculated.

Abstract: A monitoring device includes processing circuitry configured to a configuration management tool and is used when a configuration of a device to be monitored is updated, analyze the operation instruction information, and extract a part where the configuration of the device to be monitored changes and content of the change; and create a determination criterion that defines a determination method for detecting modification of data of the device to be monitored on the basis of the part where the configuration of the device to be monitored changes and the content of the change.

Abstract: In a ceramic bearing device having a ceramic bearing slidably supporting a sleeve fixed to a pump main shaft, a bearing case mounting the ceramic bearing and a bearing casing elastically supporting the bearing case with rubber, a cylindrical container is fixed to the bearing casing so as to surround the lower surface and the outer peripheral side of the bearing casing, a water storage tank having a return plate in the top end portion being fixed to the pump main shaft so as to surround the cylindrical container, a passage being provided in the cylindrical container, distance pieces being provided between the outer peripheral portion of the bearing casing and the inner peripheral portion of the cylindrical container being provided, a passage being formed in the distance piece.

Abstract: A gas governor apparatus comprises an inner casing removably mounted on an outer casing. Further, a driving mechanism for driving a valve body to control pressure and flow rate of fluid between the valve body and a valve seat formed in the inner casing comprises a drive motor and a drive shaft. The drive shaft has a dual drive sleeve construction where an outer drive sleeve and the valve body are constituted as a rotating drive mechanism and an inner drive sleeve and the outer drive sleeve are constituted as an axial shifting drive mechanism. The outer and inner drive sleeves are axially shiftable by means of an elastic member. The valve body and the inner casing are maintained sealingly by dual expansible members. A flow passage is defined by the dual expansible members and the inner casing.