Abstract: An alteration detection apparatus generates index information based on a document in a storage. The alteration detection apparatus acquires index information that is associated with information identifying a document. The alteration detection apparatus determines whether there is an alteration added to the acquired document based on a result of comparison between the generated index information and the acquired index information. The alteration detection apparatus detects, when there is an alteration, an altered part in the acquired document based on the result of comparison between the generated index information and the acquired index information.

Abstract: An alteration detection apparatus generates index information based on a document in a storage. The alteration detection apparatus acquires index information that is associated with information identifying a document. The alteration detection apparatus determines whether there is an alteration added to the acquired document based on a result of comparison between the generated index information and the acquired index information. The alteration detection apparatus detects, when there is an alteration, an altered part in the acquired document based on the result of comparison between the generated index information and the acquired index information.

Abstract: An apparatus determines a plurality of candidate position groups each indicating an trajectory of estimated terminal positions on a candidate floor selected from among multiple floors, wherein the trajectory of estimated terminal positions on the candidate floor is estimated based on positions of base stations installed on the candidate floor and intensities of radio waves that have been transmitted by a terminal at time points and detected by the base stations. The apparatus identifies, from among the candidate floors selected from the multiple floors, a target floor on which the terminal actually exists, based on the trajectories of estimated terminal positions for the determined plurality of candidate position groups and a movement requirement that defines a condition of actual movement of the terminal on each of the candidate floors.

Abstract: A non-transitory computer-readable storage medium storing a program that causes a computer to execute a process including receiving an image of a floor and a floor map including a plurality of areas included in the floor, displaying the received image and the received floor map on a screen, specifying, upon a reception of a designation of a position in the image, a first area corresponding to the designated position based on correspondence information, the correspondence information indicating a correspondence between a plurality of positions in the image and the plurality of areas, obtaining information associated with the first area from a second memory storing pieces of information in association with the plurality of areas respectively, displaying the obtained information on the displayed image in association with the first area, and displaying, on the screen, information indicating a position of the first area in the floor map.

Abstract: A system includes a first storage apparatus and a second storage apparatus. The first storage apparatus includes: a generating unit to generate logs, in response to updates performed on a database in the first storage apparatus, related to the updates; a storage unit to store the logs and data representing the order of generation of each of the logs; and a transmitting unit to transmit, when the logs and the data are stored in the storage unit, the log and the data to the second storage apparatus. The second storage apparatus includes: a receiving unit to receive the logs and the data transmitted by the transmitting unit; and an updating unit to update a database in the second storage apparatus based on the logs in accordance with the order represented by the data.

Abstract: A system includes a plurality of nodes. Each of the plurality of nodes includes a processor that executes a process. The process includes: storing logs in a memory; requesting another node other than the node in which an abnormality has occurred to send information that indicates order the logs stored in the memory are created; receiving, from the other node, information that indicates order the logs stored in the other node are created; and acquiring, based on the order indicated by the received information and the order the logs stored in the memory are created, when the other node that stores therein a log that is created newer than the logs stored in the memory is present, the log created newer than the logs stored in the memory from the other node that stores therein the log created newer than the logs stored in the memory.

Abstract: A system includes a first storage apparatus and a second storage apparatus. The first storage apparatus includes: a generating unit to generate logs, in response to updates performed on a database in the first storage apparatus, related to the updates; a storage unit to store the logs and data representing the order of generation of each of the logs; and a transmitting unit to transmit, when the logs and the data are stored in the storage unit, the log and the data to the second storage apparatus. The second storage apparatus includes: a receiving unit to receive the logs and the data transmitted by the transmitting unit; and an updating unit to update a database in the second storage apparatus based on the logs in accordance with the order represented by the data.