Abstract: The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. In addition, the present disclosure relates to a method carried out by a base station of a wireless communication system, and a device for carrying out same, the method comprising the steps of: determining whether a frequency band operated by a base station uses a bandwidth that is narrower than a preset bandwidth; if a bandwidth that is narrower than the preset bandwidth is used, determining a subcarrier spacing (SCS) that is narrower than a preset SCS; generating a synchronization signal block (SSB) using the determined SCS; and transmitting the SSB, wherein the determined SCS is smaller than 15 kHz.

Abstract: A refrigerator includes a main body that defines a storage chamber; door coupled to the main body and configured to open and close the storage chamber, a first sensor disposed at the main body and configured to sense a user in a vicinity of the refrigerator, and a second sensor configured to sense a user input for selecting at least one function related to the door, and a control unit configured to, based on sensing result from the first sensor, switch the second sensor to an active state to sense the user input, and execute the at least one function related to the door based on a sensing result from the second sensor.

Abstract: Disclosed is a catalyst for oxygen reduction and evolution reactions. The catalyst is in the form of nickel sulfide (NiS2) nanosheets. NiS2 molecules are cross-linked and oriented two-dimensionally in the NiS2 nanosheets. Also disclosed is a method for producing the catalyst.

Abstract: A refrigerator includes a main body that defines a storage chamber; a door coupled to the main body and configured to open and close the storage chamber, a first sensor disposed at the main body and configured to sense a user in a vicinity of the refrigerator, and a second sensor configured to sense a user input for selecting at least one function related to the door, and a control unit configured to, based on a sensing result from the first sensor, switch the second sensor to an active state to sense the user input, and execute the at least one function related to the door based on a sensing result from the second sensor.

Abstract: Disclosed is a catalyst for oxygen reduction and evolution reactions. The catalyst is in the form of nickel sulfide (NiS2) nanosheets. NiS2 molecules are cross-linked and oriented two-dimensionally in the NiS2 nanosheets. Also disclosed is a method for producing the catalyst.