Abstract: Provided are an epitaxial growth apparatus and a multi-layer gas supply module used therefor, the epitaxial growth apparatus including: a reaction chamber; a susceptor positioned in the reaction chamber and configured to seat a wafer thereon; and a multi-layer gas supply module configured to supply a gas to the reaction chamber to form an epitaxial layer on the wafer, wherein the multi-layer gas supply module includes an injector including ports of a plurality of layers, each of which discharges a different gas for each layer, among the ports of the plurality of layers, the ports of each layer including a center port corresponding to a central region of the wafer, and a pair of edge ports corresponding to both edge regions of the wafer, and a flow distribution unit configured to distribute gas flows input to the center port and the edge port among the ports of each layer independently from each other.

Abstract: A battery fire detection device according to an embodiment includes: a first sensor configured to detect whether a gas vent of a battery cell is opened; a second sensor configured to detect a temperature of the battery cell; and a controller configured to determine whether there is a risk of fire or whether a fire occurs in the battery cell based on detection results of the first sensor and the second sensor.

Abstract: Provided are an epitaxial growth apparatus and a gas supply control module used therefor, the epitaxial growth apparatus including: a reaction chamber; a susceptor positioned in the reaction chamber and configured to seat a wafer thereon; and a gas supply control module configured to control a flow of a gas flowing into the reaction chamber, wherein the gas supply control module includes an injector including a center port corresponding to a central region of the wafer, a pair of edge ports corresponding to both edge regions of the wafer, and a pair of middle ports respectively disposed between the center port and the pair of edge ports, and a flow distribution unit configured to independently distribute the gas flow input from a source module to the ports.

Abstract: An antenna apparatus includes: a parabolic reflector; a dielectric support pedestal; a sub-reflector connected to an upper part of the dielectric support pedestal; and a waveguide connected to a lower part of the dielectric support pedestal, wherein the parabolic reflector has a curved surface in which a ratio of a focal length to a diameter is greater than a preset value, and at least one corrugation configured to suppress a cross polarization is formed in a region of the dielectric support pedestal.

Abstract: The present disclosure relates to a system and apparatus for monitoring a partial discharge in a switchboard, including a plurality of partial discharge sensors provided in each of a plurality of switchboards to acquire partial discharge data generated in at least one switchboard, and a noise sensor provided in any one of the plurality of switchboards to acquire noise data to be differentiated from the partial discharge data acquired from the at least one partial discharge sensor, and it can be applied to other exemplary embodiments.

Abstract: A battery sub-packing unit includes a plurality of secondary battery cells, a cell support member including a seating portion for accommodating the plurality of secondary battery cells, and a venting inducing portion connecting the seating portion to an external area, and a case member provided to surround the secondary battery cell accommodated in the seating portion and to seal around the secondary battery cell.

Abstract: A battery fire detection device according to an embodiment includes: a first sensor configured to detect whether a gas vent of a battery cell is opened; a second sensor configured to detect a temperature of the battery cell; and a controller configured to determine whether there is a risk of fire or whether a fire occurs in the battery cell based on detection results of the first sensor and the second sensor.

Abstract: An image stitching apparatus for inspecting a wind turbine, comprises a preprocessing module configured to generate a preprocessed image pair by removing background areas around blades of a wind turbine from photographed images of the wind turbine captured by a drone, an initial match point determination module configured to determine first initial match points in the preprocessed image pair by using a pre-trained deep learning module, a valid match point determination module configured to determine non-utilized match points out of the determined first initial match points, and determine valid match points by excluding the determined non-utilized match points from the determined first initial match points, and an image stitching module configured to perform image stitching between a plurality of images.

Abstract: A load limiter may include a load limiter body to which a downward pulling force and an upward pulling force are applied together in opposite directions, wherein the load limiter absorbs energy by deformation to limit the downward pulling force in a multi-stage manner and simultaneously absorbs energy by deformation to limit the upward pulling force in a multi-stage manner.

Abstract: A load limiter may include a load limiter body to which a downward pulling force and an upward pulling force are applied together in opposite directions, wherein the load limiter absorbs energy by deformation to limit the downward pulling force in a multi-stage manner and simultaneously absorbs energy by deformation to limit the upward pulling force in a multi-stage manner.

Abstract: Disclosed herein is a method for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of mixing 30˜100 wt % sulfuric acid and an oxytitanium phthalocyanine crude in a mixing ratio between 100:1 and 1:1, homogeneously grinding the mixture in a wet grinder filled with zirconia or glass beads as grinding media at ?20° C.˜60° C. for 0.1˜24 hours, and removing the grinding media from the ground mixture using a solvent. According to the method, oxytitanium phthalocyanine usable as a high-quality charge generating material can be prepared without the use of expensive and difficult-to-handle reactants, such as trifluoroacetic acid and pentafluoropropionic acid. Further disclosed is an oxytitanium phthalocyanine charge generating material prepared by the method.

Abstract: Disclosed herein are a method and an apparatus for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of homogeneously mixing an oxytitanium phthalocyanine crude with an organic solvent while microwave energy having a frequency of 0.1˜100 GHz and a power of 10˜3,000 W and ultrasonic wave energy having a frequency of 1˜1,000 kHz and a power of 10˜5,000 W are applied thereto, and reacting the mixture at 30˜100° C. for 0.5˜5 hours. The apparatus comprises: a magnetron 1 capable of generating a frequency of 0.

Abstract: A pipe coupling inc1udes a pair of half members which have a half-ring shape on the x-y plane and a thickness along the z axis, wherein the half member includes a first end on which a circumferential groove is disposed, the circumferential groove including a first groove surface and a second groove surface which are inclined over the x-y plane; and a second end on which a circumferential protrusion is disposed, the circumferential protrusion including a first protrusion surface and a second protrusion surface which are inclined over the x-y plane, wherein the first groove surface and the second groove surface are inclined over the x-z plane in the same angle and direction as the first protrusion surface and the second protrusion surface.

Abstract: An embodiment of the present application is a pipe coupling including a pair of half members which have a half-ring shape on the x-y plane and thickness along the z axis, wherein the half member includes a first end on which a circumferential groove is disposed, the circumferential groove including a first groove surface and a second groove surface which are inclined over the x-y plane; and a second end on which a circumferential protrusion is disposed, the circumferential protrusion including, a first protrusion surface and a second protrusion surface which are inclined over the x-y plane, wherein the first groove surface and the second groove surface are inclined over the x-z plane in the same angle and direction as the first protrusion surface and the secons protrusion surface.

Abstract: Disclosed herein are a method and an apparatus for preparing oxytitanium phthalocyanine as a charge generating material. The method comprises the steps of homogeneously mixing an oxytitanium phthalocyanine crude with an organic solvent while microwave energy having a frequency of 0.1˜100 GHz and a power of 10˜3,000 W and ultrasonic wave energy having a frequency of 1˜1,000 kHz and a power of 10˜5,000 W are applied thereto, and reacting the mixture at 30˜100° C. for 0.5˜5 hours. The apparatus comprises: a magnetron 1 capable of generating a frequency of 0.