Abstract: A secondary battery includes: a can having an accommodation space therein; an electrode assembly accommodated in the accommodation space in the can; and a cap assembly sealed with the can. The can has a beading part recessed into a side wall of the can at a region below where the cap assembly is accommodated, and the beading part has an acute angle with respect to the side wall of the can.

Abstract: A bent rotor straightening method using low-frequency induction heating and a bent rotor straightening apparatus using the method are proposed. The bent rotor straightening method using low-frequency induction heating according to an embodiment of the present invention includes: calculating a heating speed when a first target temperature for correcting bending of a rotor using low-frequency induction heating is set; maintaining the first target temperature for a heating time determined on the basis of a diameter of the rotor when the first target temperature is reached, when performing primary thermal correction at the heating speed; checking whether a bending amount of the rotor reaches a predetermined critical value in accordance the result of performing the primary thermal correction; and finishing correction of bending of the rotor in accordance with the result of checking the bending amount of the rotor.

Abstract: Disclosed is an electronic device. Other various embodiments as understood from the specification are also possible. The electronic device may include a connector electrically connected to an external device and including a first pin and a second pin and a cable including a plurality of lines. The cable may include an antenna line for receiving a broadcast signal among the plurality of lines, and the antenna line may be configured to be allocated to one pin among the first pin or the second pin.

Abstract: A bent rotor straightening method using low-frequency induction heating and a bent rotor straightening apparatus using the method are proposed. The bent rotor straightening method using low-frequency induction heating according to an embodiment of the present invention includes: calculating a heating speed when a first target temperature for correcting bending of a rotor using low-frequency induction heating is set; maintaining the first target temperature for a heating time determined on the basis of a diameter of the rotor when the first target temperature is reached, when performing primary thermal correction at the heating speed; checking whether a bending amount of the rotor reaches a predetermined critical value in accordance the result of performing the primary thermal correction; and finishing correction of bending of the rotor in accordance with the result of checking the bending amount of the rotor.

Abstract: Disclosed is an electronic device. Other various embodiments as understood from the specification are also possible. The electronic device may include a connector electrically connected to an external device and including a first pin and a second pin and a cable including a plurality of lines. The cable may include an antenna line for receiving a broadcast signal among the plurality of lines, and the antenna line may be configured to be allocated to one pin among the first pin or the second pin.

Abstract: An optical semiconductor lighting apparatus according to exemplary embodiments of the present invention provides a heat radiation member having a heat radiation plate where heat radiation fins are disposed radially, a cooling member disposed in an internal space at the center part of the heat radiation plate which inner curved portions of the heat radiation fins form, a light emitting member coupled to a lower surface of the heat radiation plate, and a cover coupled to the outer edge of the heat radiation member while covering the cooling member wherein the heat radiation fins comprise a first heat radiation fin and a second heat radiation fin which is lower than the first heat radiation fin.

Abstract: An optical semiconductor light apparatus includes: a first light emitting block including one or more first light emitting modules; a junction box formed on one side surface of the first light emitting block and fastened to an end portion of a column; and at least one second light emitting block disposed on the other side surface of the first light emitting block and including one or more second light emitting modules, wherein the first and second light emitting modules are formed on one side thereof with one or more optical semiconductor devices and on the other side thereof with a plurality of heat dissipation fins, and the heat dissipation fins are received in the first and second light emitting blocks and formed in a direction in which the second light emitting block is coupled to the first light emitting block.

Abstract: An exemplary embodiment of the present invention discloses a light emitting diode (LED) lighting apparatus with a housing, a lighting module and a diffusion cover. The lighting module includes a circuit board combined with the housing, and a plurality of light emitting diodes mounted on the circuit board to generate light, the light emitting diodes in a first region being arranged with a first distance and the light emitting diodes in a second region being arranged with a second distance that is greater than the first distance. The diffusion cover is combined with the housing such that the diffusion cover covers the lighting module. The diffusion cover has a groove portion at a region corresponding to the second region.