Abstract: Provided is a cooling structure for a rotary electric machine, the rotary electric machine including a ring-shaped stator, a rotor that is disposed to face the stator and is rotatable about a rotation axis, and a coil end formed in a side portion in an axial direction of the stator. The cooing structure includes a coil end cover that covers the coil end, is provided so as to be able to store a coolant therein, and has a coolant introduction hole through which the coolant is introduced and a coolant discharge hole through which the coolant stored in the coil end cover overflows and is discharged to the outside, and a coolant supply unit connected to the coolant introduction hole and configured to supply the coolant into the coil end cover.

Abstract: A battery active material includes a crystal phase that is represented by a formula Y2?xScxTi2O5S2 (where 0<x<2), and has a Ruddlesden-Popper structure.

Abstract: A fluid transmission device includes a pre-damper (10) that transmits driving force received from a crankshaft (100) to a front cover (20) via first damper springs (14), a mechanism (30) that transmits the driving force transmitted to a pump (31) to a turbine (32) via hydraulic fluid, a piston member (40) that is disposed between the front cover (20) and the mechanism (30) and delivers the driving force to an output shaft (200), a dynamic damper (60) that connects the piston member (40) and the turbine (32) via second damper springs (63), a lock-up clutch (50) that enables the front cover (20) and the piston member (40) to engage with each other, a turbine clutch (70) that enables the turbine (32) and the piston member (40) to engage with each other, and a control device (80) that controls the lock-up clutch (50) and the turbine clutch (70).