Abstract: A refrigerator may include a storage compartment, an inner door which comprises an opening having a size corresponding to a size of the storage compartment, a plurality of door guards, and an outer door which open and close the storage compartment, wherein the inner door comprises a control unit may control an internal environment of the storage compartment.

Abstract: Variable resistance elements and semiconductor devices including the variable resistance elements are disclosed. In some implementations, a variable resistance element may include a variable resistance element may include a free layer having a variable magnetization direction that switches between different magnetization directions upon application of a magnetic field, a pinned layer having a fixed magnetization direction, and a tunnel barrier layer interposed between the free layer and the pinned layer and including a metal chalcogenide having a cubic crystal structure.

Abstract: A propeller shaft for a vehicle includes: a shaft having a plurality of catching protrusions for a spline-connection along an outer peripheral surface; a tube having a plurality of catching grooves along an inner peripheral surface into which the shaft is inserted; a stopper member provided to be fixed to an inner peripheral surface of the tube, one end corresponding to a remote end of the shaft and which is fractured when a collision load is applied thereto; and a locking member one end of which is in contact with one end of the stopper member and which is connected to the shaft and supports both ends of the stopper member together with the shaft, thereby restricting a sliding of the shaft, and which is slid inside the tube together with the shaft when the stopper member is fractured.

Abstract: A propeller shaft for a vehicle includes: a shaft having a plurality of catching protrusions for a spline-connection along an outer peripheral surface; a tube having a plurality of catching grooves along an inner peripheral surface into which the shaft is inserted; a stopper member provided to be fixed to an inner peripheral surface of the tube, one end corresponding to a remote end of the shaft and which is fractured when a collision load is applied thereto; and a locking member one end of which is in contact with one end of the stopper member and which is connected to the shaft and supports both ends of the stopper member together with the shaft, thereby restricting a sliding of the shaft, and which is slid inside the tube together with the shaft when the stopper member is fractured.

Abstract: Disclosed is a drive shaft that includes a first rotary shaft having a plurality of locking projections for a spline engagement formed along an outer circumferential surface of the end portion of the first rotary shaft. The driveshaft further includes a secondary rotary shaft having a plurality of locking grooves for the spline engagement corresponding to the locking projections, which are formed on the inner circumferential surface into which the first rotary shaft are inserted. Additionally, the driveshaft includes fixing members fitted on the outer circumference of the first rotary shaft and fixing apertures which are formed through the outer circumference of the first rotary shaft or the inner circumference of the second rotary shaft to correspond to the fixing members and into which the fixing members are fitted.