Abstract: A priority determination system includes: an anomaly obtainer that obtains a plurality of items of anomaly data; a circumstance obtainer that obtains a plurality of items of circumstance data; a risk value calculator that calculates a risk value; a priority determiner that determines the priority of each task based on the risk value; an outputter that provides an output based on the result of the determination; and a circumstance change notification manager that determines whether or not each of the plurality of items of anomaly data is circumstance change notification target data. The circumstance change notification manager requests a mobile object corresponding to anomaly data determined to be the circumstance change notification target data to send circumstance data after change. The risk value calculator recalculates the risk value based on the circumstance data after change. The priority determiner redetermines the priority of a task based on the recalculated risk value.

Abstract: Each of column portions has a first branch portion and a second branch portion bifurcated in the circumferential direction at one end portion in the axial direction, and a grease storage groove between the first and second branch portions, a tip-end portion of the first branch portion of one column portion and a tip-end portion of the second branch portion of an adjacent column portion are connected in the circumferential direction, and a tip-end portion of the second branch portion of the one column portion and a tip-end portion of the first branch portion of another adjacent column portion are connected in the circumferential direction.

Abstract: An information provision method is executed by an information processing device that: obtains attack information through communication with a security monitoring device that determines presence or absence of an attack based on log information obtained from a vehicle; and provides countermeasure information to a passenger inside the vehicle or a person outside the vehicle.