Abstract: An operation assistance method for presenting a recommended operational action in response to an alert issued in a facility includes: detecting issuance of the alert; extracting, from an alert history storage unit, an issuance history of a same type of alert as the alert of which the issuance or the sign of issuance has been detected; extracting, from an operation history storage unit storing an operation history of the facility, an operational action after issuance of the same type of alert; extracting, from an operational data storage unit storing information indicating an operational state of the facility, information indicating the operational state after the operational action, and verifying an influence of the operational action on the operational state; and presenting the recommended operational action in response to the alert of which the issuance has been detected, based on the extracted operational action and the verified influence.

Abstract: Provided is a metal oxide containing a brownmillerite-type manganese oxide represented by (Ca2-xAx)(MnyAlzE2-y-z)wO5+? (in the formula, A represents one or more alkaline earth metal elements other than Ca; E represents one or more 3d transition metal elements or earth metal elements other than Mn and Al; and x, y, z, ?, and w satisfy 0?x?2, 0<y?2, 0?z<2, 0<y+z?2, 0???0.5, and 0.8?w?1.2), wherein the metal oxide has a defect in a (020) plane of a crystal of the brownmillerite-type manganese oxide.

Abstract: An operation assistance method for presenting a recommended operational action in response to an alert issued in a facility includes: detecting issuance of the alert; extracting, from an alert history storage unit, an issuance history of a same type of alert as the alert of which the issuance or the sign of issuance has been detected; extracting, from an operation history storage unit storing an operation history of the facility, an operational action after issuance of the same type of alert; extracting, from an operational data storage unit storing information indicating an operational state of the facility, information indicating the operational state after the operational action, and verifying an influence of the operational action on the operational state; and presenting the recommended operational action in response to the alert of which the issuance has been detected, based on the extracted operational action and the verified influence.

Abstract: Two protrusions are disposed on the fixed contact along a lateral direction on a contacting surface. The two protrusions are disposed in a longitudinal direction with a predetermined interval on the contacting surface, and a planar portion is formed between the two protrusions. A single projection that intersects perpendicular to the two protrusions disposed on a first fixed contact and another single projection that intersects perpendicular to the two protrusions disposed on a second fixed contact are disposed on a movable contact. Thereby, when the movable contact contacts to a pair of fixed contacts, since the protrusions disposed on the fixed contact and the projections disposed on the movable contact contacts only at intersections of each other, a contacting surface pressure is increased and a crushing force for ice frozen on a surface of the fixed contact becomes large.

Abstract: Two protrusions are disposed on the fixed contact along a lateral direction on a contacting surface. The two protrusions are disposed in a longitudinal direction with a predetermined interval on the contacting surface, and a planar portion is formed between the two protrusions. A single projection that intersects perpendicular to the two protrusions disposed on a first fixed contact and another single projection that intersects perpendicular to the two protrusions disposed on a second fixed contact are disposed on a movable contact. Thereby, when the movable contact contacts to a pair of fixed contacts, since the protrusions disposed on the fixed contact and the projections disposed on the movable contact contacts only at intersections of each other, a contacting surface pressure is increased and a crushing force for ice frozen on a surface of the fixed contact becomes large.