Abstract: A submergence data detection device includes a vehicle data acquisition unit configured to acquire vehicle data including at least acceleration data and estimation data for acquiring a drive power value and a traveling resistance value, and a submergence data detection unit configured to detect submergence data based on the vehicle data by a detection method including comparison of a threshold value set according to a calculated value of an acceleration of the vehicle calculated from the drive power value and the traveling resistance value with an actual value of the acceleration, and adjust the detection method according to whether or not a traveling state indicated by the vehicle data corresponds to a first state, in which reliability of the calculated value of the acceleration is degraded, such that detection accuracy of the submergence data in the first state is improved.

Abstract: A road surface flooding determination device includes: a traveling data acquisition unit configured to acquire an actual acceleration that is applied in a front-rear direction of a vehicle and is detected by an acceleration sensor; and a determination unit configured to calculate a theoretical acceleration which is a theoretical acceleration applied in the front-rear direction of the vehicle traveling on a road surface that is not flooded, and to determine whether or not a traveling position of the vehicle is a flooding location based on a difference between the actual acceleration and the theoretical acceleration.

Abstract: A road surface water depth calculation device includes: an acquisition unit configured to acquire flooding locations at which a vehicle travels and water depth candidates of the flooding locations; an extraction unit configured to extract a plurality of continuous flooding locations from the acquired flooding locations; an altitude acquisition unit configured to acquire altitudes of the extracted flooding locations; an estimation unit configured to calculate a sum of the water depth candidate and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations, and estimate the sum as a water surface altitude which is an altitude of a water surface of each of the extracted flooding locations; and a calculation unit configured to calculate a water depth of the extracted flooding location based on the water surface altitude and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations.

Abstract: A trip purpose estimation apparatus includes a trip information acquisition unit acquiring trip information per trip of a vehicle, the trip information including a departure point, an arrival point, a departure time, and an arrival time of the vehicle, a trip information storage unit storing a history of the trip information acquired by the trip information acquisition unit, a differential calculation unit calculating a time of stay of the vehicle at the arrival point of a target trip based on the history of the trip information stored in the trip information storage unit, the target trip corresponding to the trip in which a trip purpose of a passenger of the vehicle is estimated, and a trip purpose estimation unit estimating the trip purpose of the passenger of the vehicle to the arrival point of the target trip based on the calculated time of stay.

Abstract: A third-order nonlinear optical main chain polymer material contains a high .chi..sup.(3) component having no less than 3 but no more than 7 .pi.-conjugated bonding groups and having an electron donor in the main chain of the polymer through covalent bonds. The donor is preferably an alkylamino structure, more preferably a dialkylamino structure. Particularly preferred is a diethylamino structure. The high .chi..sup.(3) component is preferably a phenylene ring system of which phenylene rings are bonded through azo bonding groups with the phenylene rings and the azo bonding groups being positioned alternately. The polymer main chain is polyurethane or polyester. The third-order nonlinear optical main chain polymer material is prepared by polyaddition of a high .chi..sup.(3) compound, i.e., a precursor of the high .chi..sup.(3) component, having a hydroxyl group at each end with a diisocyanate compound or by polycondensation of the high .chi..sup.(3) compound with a dicarboxylic acid.

Abstract: A third-order nonlinear optical main chain polymer material contains a high .chi..sup.(3) component having no less than 3 but no more than 7 .pi.-conjugated bonding groups and having an electron donor in the main chain of the polymer through covalent bonds. The donor is preferably an alkylamino structure, more preferably a dialkylamino structure. Particularly preferred is a diethylamino structure. The high .chi..sup.(3) component is preferably a phenylene ring system of which phenylene rings are bonded through azo bonding groups with the phenylene rings and the azo bonding groups being positioned alternately. The polymer main chain is polyurethane or polyester. The third-order nonlinear optical main chain polymer material is prepared by polyaddition of a high .chi..sup.(3) compound, i.e., a precursor of the high .chi..sup.(3) component, having a hydroxyl group at each end with a diisocyanate compound or by polycondensation of the high .chi..sup.(3) compound with a dicarboxylic acid.