Abstract: A method for transmitting and receiving signals, performed by a terminal, in a C-RAN environment, includes sequentially transmitting fixed beams; receiving, from at least one first TRP determined as TRP(s) performing signal transmission and reception with the terminal among the plurality of TRPs, control information including information on whether to transmit a reference signal for reception of downlink data and an index of a transmission beam selected for uplink transmission; and receiving the downlink data from the at least one first TRP, and demodulating the downlink data by using a reception beam weight derived from a weight used for transmission of the fixed beams or by using the reference signal.

Abstract: The present invention relates to a method for exhausting high concentrations of toxic gases generated during chemical stripping for high-temperature parts of a gas turbine, the method including the steps of: allowing a pair of openable/closable doors mounted on top of a tank whose top is open to accommodate a chemical substance therein to be closed during the chemical stripping so as to close top of the tank; collecting the toxic gases generated from the interior of the tank through hoods located at the inside of the tank; and exhausting the toxic gases to the outside through exhaust pipes mounted on the hoods or collecting the toxic gases to a separate storage tank.

Abstract: The present invention relates to a method for exhausting high concentrations of toxic gases generated during chemical stripping for high-temperature parts of a gas turbine, the method including the steps of: allowing a pair of openable/closable doors mounted on top of a tank whose top is open to accommodate a chemical substance therein to be closed during the chemical stripping so as to close top of the tank; collecting the toxic gases generated from the interior of the tank through hoods located at the inside of the tank; and exhausting the toxic gases to the outside through exhaust pipes mounted on the hoods or collecting the toxic gases to a separate storage tank.

Abstract: An apparatus and method is configured to detect the proximity of an object using a proximity sensor in a portable terminal. A method for detecting the proximity of an object in a portable terminal mounted with a proximity sensor includes setting a reference light-receiving quantity according to a hairstyle of a user of the portable terminal, emitting light, detecting a light-receiving quantity corresponding to the emitted light, and determining the proximity/non-proximity of an object by comparing the light-receiving quantity with the reference light-receiving quantity.

Abstract: An apparatus and method is configured to detect the proximity of an object using a proximity sensor in a portable terminal. A method for detecting the proximity of an object in a portable terminal mounted with a proximity sensor includes setting a reference light-receiving quantity according to a hairstyle of a user of the portable terminal, emitting light, detecting a light-receiving quantity corresponding to the emitted light, and determining the proximity/non-proximity of an object by comparing the light-receiving quantity with the reference light-receiving quantity.