Abstract: Provided is method of providing a conversation service in an electronic apparatus, including receiving a conversation input from a user terminal, identifying conversation history information associated with a user of the user terminal, obtaining score information corresponding to the user based on the conversation input and the conversation history information, obtaining response information based on the conversation input and the conversation history information, and providing the user terminal with at least one of the score information and the response information.

Abstract: Disclosed are a helium gas liquefier and a method for liquefying a helium gas. The disclosed helium gas liquefier includes: a first cooling part including a first cooling column; a first cold head installed on the first cooling column, and a first cylinder in which the first cooling column and the first cold head are built; a second cooling part including a second cooling column, a second cold head installed on the second cooling column, and a second cylinder in which the second cooling column and the second cold head are built; and a liquid helium storage disposed under the second cooling part.

Abstract: Provided is an electric dual-mode wiper system for a railway vehicle. The electric dual-mode wiper system for a railway vehicle includes a first wiper drive unit and a second wiper drive unit, and controls a synchronization operation of the first wiper drive unit and a second wiper drive unit.

Abstract: Disclosed are a drunk driving prevention system and a method of controlling the system that includes a sensor module measuring a alcohol content in the exhaled breath of a driver during a breath-checking of the driver and a control module configured to check the intoxication state of the driver from the alcohol content measured by the sensor module to determine whether the breath-checking is complete and block an engine start when the breath-checking fails, wherein the control module includes a check unit displaying breath-checking guide information through a display unit and the check unit displays the breath-checking guide information based on an engine start input of the driver.

Abstract: A wafer manufacturing method, an epitaxial wafer manufacturing method, and a wafer and epitaxial wafer manufactured thereby, are provided. The wafer manufacturing method enables the manufacture of a wafer with a low density of micropipe defects and minimum numbers of particles and scratches. The epitaxial wafer manufacturing method enables the manufacture of an epitaxial wafer that has low densities of defects such as downfall, triangular, and carrot defects, exhibits excellent device characteristics, and improves the yield of devices.

Abstract: An embodiment sulfur dioxide-based inorganic electrolyte is provided in which the sulfur dioxide-based inorganic electrolyte is represented by a chemical formula M·(A1·Cl(4-x)Fx)z·ySO2. In this formula, M is a first element selected from the group consisting of Li, Na, K, Ca, and Mg, A1 is a second element selected from the group consisting of Al, Fe, Ga, and Cu, x satisfies a first equation 0?x?4, y satisfies a second equation 0?y?6, and z satisfies a third equation 1?z?2.

Abstract: A wafer manufacturing method, an epitaxial wafer manufacturing method, and a wafer and epitaxial wafer manufactured thereby, are provided. The wafer manufacturing method enables the manufacture of a wafer with a low density of micropipe defects and minimum numbers of particles and scratches. The epitaxial wafer manufacturing method enables the manufacture of an epitaxial wafer that has low densities of defects such as downfall, triangular, and carrot defects, exhibits excellent device characteristics, and improves the yield of devices.

Abstract: According to the present disclosure, a drunk driving prevention system including: an alcohol detection unit configured to detect a driver's inebriation through the breath test device provided in a vehicle; a computation unit configured, when the driver is detected to be in a drunk state by the alcohol detection unit, to compute a driving-possible time at which the drunk state is resolved in the future so that driving is possible; and a notification unit configured to output the driving-possible time or whether or not driving is possible through an infotainment system of the vehicle or a driver's terminal is disclosed.

Abstract: An embodiment alcohol sensing system includes an air duct including a first opening and a second opening, the first opening being opened to an outside of the air duct, and a sensor module connected to the air duct at the second opening, the sensor module including a fan configured to rotate in opposite directions and an alcohol sensor configured to measure an alcohol content in air.

Abstract: A brake caliper diagnostic device for railway vehicles according to an embodiment of the present disclosure includes an internal pressure sensor located between a brake hose for delivering brake oil or compressed air to the brake caliper and an inlet of the brake caliper, internal temperature sensors respectively installed in the air breathers respectively located above and below the brake caliper, an assembly plate temperature sensor located adjacent to a brake pad assembly, a piston temperature sensor located on a surface of a brake caliper body adjacent to a piston, and a brake caliper monitoring device configured to determine whether or not the brake caliper is abnormal, based on data received from the internal pressure sensor, the internal temperature sensors, the assembly plate temperature sensor, and the piston temperature sensor.

Abstract: Disclosed is a system for preventing drunk driving of a vehicle, the system including: an input unit through which a transfer intention to transfer a control privilege of a vehicle from a registered driver to a passenger is input; a sobriety determination unit configured to determine a current driver's inebriation state through a breathalyzer provided in the vehicle when the transfer intention is input through the input unit; a driver verification unit configured to identify personal information of the current driver seated on a driver's seat; and a control unit configured to transfer the control privilege of the vehicle to the passenger when the passenger is measured as being able to drive by the sobriety determination unit and the passenger and the current driver are identified to be the same by the driver verification unit.