Abstract: Provided is a method for producing lithium carbonate from lithium ion battery waste, the lithium ion battery waste including battery positive material components containing Li and at least one metal selected from the group consisting of Co, Ni and Mn, wherein, after subjecting the lithium ion battery waste to a wet process, thereby separating the at least one metal of the battery positive material components from the lithium ion battery waste to obtain crude lithium carbonate, the method includes: a dissolution step of dissolving the crude lithium carbonate in a liquid while feeding a carbon dioxide gas; and a decarbonization step of heating a lithium dissolved solution obtained in the dissolution step to release carbonic acid, and wherein when dissolving the crude lithium carbonate in the liquid in the dissolution step, the liquid is stirred in a reaction vessel using a stirrer, and a ratio of a diameter (d) of a stirring blade of the stirrer to an inner diameter (D) of the reaction vessel (d/D) is from 0.

Abstract: A digital twin computation section collects a speed of an own ship, a position of the own ship, and a heading of the own ship in real time, and reproduces an actual hull motion of the own ship realized at a current steering angle on a navigational electronic marine chart. A simulation computation section displays, on the navigational electronic marine chart, an assumed hull motion of the own ship determined by calculation that assumes that a force acting on the hull is a driving force at the current steering angle. A resultant force of external forces computation section calculates an acting direction and a magnitude of a resultant force of external forces acting on the hull based on a ship speed difference, ship position difference, and heading difference between the actual hull motion and the assumed hull motion.

Abstract: In collision-avoidance maneuvering in congested waters, an own ship is decelerated by astern power. The own ship is continuously navigated on a current target course with a propulsion propeller always rotated forward at the stern of the own ship. The astern power is generated as the propulsion of a propeller slipstream with rudder angles formed at a pair of right and left high-lift rudders disposed behind the propulsion propeller. In the decelerating maneuvering, the rudder angles formed at the high-lift rudders are controlled within a range from a rudder angle for applying a maximum propeller slipstream as the astern power to a rudder angle for eliminating the ahead power of the propeller slipstream, and the deceleration of the own ship is controlled by changing the astern power according to the rudder angles.

Abstract: The power control device performs power supply to each of a plurality of loads (231 to 234) by a time-proportional control, where a maximum load factor and a current value or a power value during on-control are made to correspond to each of the plurality of loads.

Abstract: Provided is a deflector extending along the front edge of an opening provided in the roof of a vehicle. The deflector includes: multiple recessed portions each being formed to be recessed away from the front, and multiple projected portions each being formed to be projected further toward the front than the recessed portions. The recessed portions and the projected portions are arranged at the front surface of the deflector alternately in the extending direction of the deflector.

Abstract: A pointing device includes an operating body 200 in which one end operably protrudes from an opening 111a of a cover portion 111 of a case body 100 and which is movable depending on the operation toward a horizontal direction from an origin position ?; a first returning assisting plate 510 provided with the operating body 200 and having a reception hole 511 penetrating in the thickness direction; a first biasing means 530 which retains the operating body 200 at the origin position ? by biasing an outer circumference surface of the first returning assisting plate 510; a fitting block 540 accommodated movably in and out of the reception hole 511; and a second biasing means 550 which biases the fitting block 540 toward the cover portion 111. The fitting block 540 protrudes from the reception hole 511 to fit into the opening 111a of the cover portion 111 by being biased with the second biasing means 550 when the operating body 200 is located at the origin position ?.

Abstract: A pointing device includes an operating body 200 in which one end operably protrudes from an opening 111a of a cover portion 111 of a case body 100 and which is movable depending on the operation toward a horizontal direction from an origin position ?; a first returning assisting plate 510 provided with the operating body 200 and having a reception hole 511 penetrating in the thickness direction; a first biasing means 530 which retains the operating body 200 at the origin position ? by biasing an outer circumference surface of the first returning assisting plate 510; a fitting block 540 accommodated movably in and out of the reception hole 511; and a second biasing means 550 which biases the fitting block 540 toward the cover portion 111. The fitting block 540 protrudes from the reception hole 511 to fit into the opening 111a of the cover portion 111 by being biased with the second biasing means 550 when the operating body 200 is located at the origin position ?.