Abstract: A positive electrode active material for a secondary battery includes a center part and a covering part. The center part includes a layered rock-salt lithium-nickel composite oxide. The covering part covers a surface of the center part and includes a boron compound. The positive electrode active material has a crystallite size of a (104) plane that is greater than or equal to 40.0 nm and less than or equal to 74.5 nm. The crystallite size is calculated by X-ray diffractometry and Scherrer equation. The positive electrode active material has a specific surface area that satisfies a condition represented by ?0.0160×Z+1.72?A??0.0324×Z+2.94 where Z is the crystallite size (nm), and A is the specific surface area (m2/g). The specific surface area is measured by BET specific surface area measurement method.

Abstract: Provided is a game program in which a region attribute of at least one region, among a plurality of regions included in a game field, is changed during a competition game in accordance with the progression state of the game, an event is generated during the progress of the game, and the event is progressed in accordance with the number of regions having a predetermined region attribute or the area of the region.

Abstract: Provided is a game program in which a region attribute of at least one region, among a plurality of regions included in a game field, is changed during a competition game in accordance with the progression state of the game, an event is generated during the progress of the game, and the event is progressed in accordance with the number of regions having a predetermined region attribute or the area of the region.