Abstract: A semiconductor device includes a semiconductor structure including a first conductive semiconductor layer, a second conductive semiconductor layer disposed on the first conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer. The first conductive semiconductor layer includes a first superlattice layer including a plurality of first sub layers and a plurality of second sub layers, and a first sub layer of the plurality of first sub layers and a second sub layer of the plurality of second sub layers are alternately disposed. The semiconductor structure includes a composition of a first dopant which is a n-type dopant.

Abstract: Disclosed in an embodiment is a semiconductor device comprising a semiconductor structure, which comprises a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, wherein: the first conductive semiconductor layer comprises a first super lattice layer comprising a plurality of first sub layers and a plurality of second sub layers, the first and second sub layers being alternately arranged; the semiconductor structure emits ions of indium, aluminum, and a first and second dopant during a primary ion irradiation; the intensity of indium ions emitted from the active layer includes a maximum indium intensity peak; the doping concentration of the first dopant emitted from the first conductive semiconductor layer includes a maximum concentration peak; the maximum indium intensity peak is disposed to be spaced from the maximum concentration peak in a first direction; th

Abstract: The present invention relates to a method for operating a massage apparatus for pulling a user's waist, the method comprising: a step in which a control unit controls a back frame so that the back frame reclines backward; a step in which the control unit controls a leg massage part so that the leg massage part is lifted up; a step in which the position of a massage module is controlled so that a massage ball is positioned on the user's waist; and a step in which the massage ball is moved in a first direction or a second direction and air is injected into a waist airbag to pull the user's waist.

Abstract: Disclosed is a method of preparing krill oil. A method of preparing krill oil may include providing a dried krill powder; obtaining an extract after adding spirits of wine to the dried krill powder; obtaining a passing solution from which salt and cholesterol are removed by passing the extract through a column; obtaining a krill concentrate by decompression-concentrating the passing solution; and obtaining krill oil by stationarily positioning a mixture obtained by adding spirits of wine to the krill concentrate, layer-separating the stationarily positioned mixture, extracting a supernatant of the layer-separated mixture, and concentrating the extracted supernatant.

Abstract: Provided is a massage device capable of forward and backward tilting, and the massage device may include: a main frame which supports at least a region of a user's body; a base frame which is disposed under the main frame and supports the main frame; a tilting frame which is disposed between the main frame and the base frame and is connected to tilting shafts provided at the front of the base frame to extend in the lateral direction; and a tilting means which is disposed between the base frame and the tilting frame and tilts the tilting frame around the tilting shafts.

Abstract: A massage apparatus includes: a first bio-signal measurement unit which is formed in an arm massage unit and includes at least one electrode positioned at a portion where the palm of a user is placed, and which is movable back and forth on the basis of the position of the hand of the user; a second bio-signal measurement unit which is formed in a foot massage unit and includes at least one electrode positioned at the rear portion of the ankle of the user, and is movable back and forth; and a control unit for acquiring information on the physical condition of the user on the basis of bio-signals obtained from the first bio-signal measurement unit and the second bio-signal measurement unit.

Abstract: Provided herein is a massage apparatus including: an arm massage unit for massaging a user's arm; and a control unit for controlling the arm massage unit. The arm massage unit comprises a space and an electrode arranged in the space, and the control unit determines whether an electrical value of the electrode is changed, and controls the operation of the arm massage unit based on a determination result and an operation state of the arm massage unit.

Abstract: Provided is a biometric signal measurement device for a massage apparatus, in which an electrode for acquiring a biometric signal of a user acquires the biometric signal while vertically moving in contact with a plantar part of the user, and at the same time, massages the plantar part, thereby improving a massage effect. The biometric signal measurement device for a massage apparatus includes a base part on which a foot of a user is placed, an electrode part that is made of a conductive material, is installed in the base part to be vertically movable, and acquires a biometric signal while in contact with a sole of the user placed on the base part, an electrode driving part that vertically moves the electrode part, and a controller that is electrically connected to the electrode part and analyzes biometric information of the user through the biometric signal acquired by the electrode part.

Abstract: The polyamide-imide block copolymer according to the present invention makes it possible to provide a polyamide-imide film having excellent thermal stability and chemical resistance and, at the same time, having excellent mechanical properties.

Abstract: An inhibitor switch is provided. The inhibitor switch includes a housing having a rotor accommodation space and a Hall element accommodation space, a rotor disposed in the rotor accommodation space, and a magnet disposed on an outer circumferential surface of the rotor. A Hall element is disposed in the Hall element accommodation space and spaced apart horizontally from the magnet with a sensing surface facing an outer circumferential surface of the magnet. Further, the inhibitor switch include a cover configured to block an opening of the rotor accommodation space to prevent the rotor from being released.

Abstract: Disclosed is a method of preparing krill oil. A method of preparing krill oil may include providing a dried krill powder; obtaining an extract after adding spirits of wine to the dried krill powder; obtaining a passing solution from which salt and cholesterol are removed by passing the extract through a column; obtaining a krill concentrate by decompression-concentrating the passing solution; and obtaining krill oil by stationarily positioning a mixture obtained by adding spirits of wine to the krill concentrate, layer-separating the stationarily positioned mixture, extracting a supernatant of the layer-separated mixture, and concentrating the extracted supernatant.

Abstract: The present disclosure relates to a poly(amide-imide) copolymer in which at least one of an imide repeating unit and an amide repeating unit is substituted with a specific functional group, and a composition and a polymer film comprising the same.

Abstract: Disclosed in an embodiment is a semiconductor device comprising a semiconductor structure, which comprises a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer disposed between the first conductive semiconductor layer and the second conductive semiconductor layer, wherein: the first conductive semiconductor layer comprises a first super lattice layer comprising a plurality of first sub layers and a plurality of second sub layers, the first and second sub layers being alternately arranged; the semiconductor structure emits ions of indium, aluminum, and a first and second dopant during a primary ion irradiation; the intensity of indium ions emitted from the active layer includes a maximum indium intensity peak; the doping concentration of the first dopant emitted from the first conductive semiconductor layer includes a maximum concentration peak; the maximum indium intensity peak is disposed to be spaced from the maximum concentration peak in a first direction; th

Abstract: An ultrasonic wave apparatus for measuring a distance according to an embodiment of the present disclosure includes: an ultrasonic sensor; and a sensor housing having the ultrasonic sensor mounted on an end therein, having a guide conduit formed in a longitudinal direction, and having a reflective wall connected with the guide conduit and positioned opposite the ultrasonic sensor, in which wedge patterns having a wedge angle may be formed on an inner surface of the guide conduit to increase directivity of an ultrasonic signal that is generated from the ultrasonic sensor.

Abstract: An inhibitor switch is provided. The inhibitor switch includes a housing having a rotor accommodation space and a Hall element accommodation space, a rotor disposed in the rotor accommodation space, and a magnet disposed on an outer circumferential surface of the rotor. A Hall element is disposed in the Hall element accommodation space and spaced apart horizontally from the magnet with a sensing surface facing an outer circumferential surface of the magnet. Further, the inhibitor switch include a cover configured to block an opening of the rotor accommodation space to prevent the rotor from being released.

Abstract: The purpose of the present invention is to provide an emotional lighting device and a control method therefor, the emotional lighting device providing optimized lighting by controlling color temperatures of lighting by compensating for a time difference between a current position and a change in the current position. As such, the present invention can provide optimized lighting.

Abstract: Provided is a compensation circuit including a memory cell array including a normal area and a redundancy area for repairing defects occurred in the normal area, a compensation time control circuit that activates a compensation start signal for a sense amplifier coupled to the normal area and the redundancy area in response to an active command, and a compensation control signal generation circuit that starts a compensation operation in response to the compensation start signal, and stops a compensation start signal for a sense amplifier coupled to an unselected word line in response to a fuse compare completion pulse and a compare address.

Abstract: The present disclosure relates to a III-nitride semiconductor light-emitting device including an n-type nitride semiconductor layer, a p-type nitride semiconductor layer doped with a p-type dopant, an active layer disposed between the n-type nitride semiconductor layer and the p-type nitride semiconductor layer and including a quantum well layer to generate light by recombination of electrons and holes, and a diffusion barrier layer disposed between the quantum well layer and the p-type nitride semiconductor layer to be in contact with both layers, having a surface formed to make the interface with the p-type nitride semiconductor layer smooth, and to prevent diffusion of the p-type dopant into the quantum well layer.

Abstract: The present invention provides a surface treatment apparatus for molded polymer products. In the operation, a molded polymer product is held by a jig (11) on a product loading and discharging unit (20) and is fed by a product feeding unit (10). A first impurity removing unit (30) cleans the surface of the product. The product passes through an inlet vacuum unit (40) and reaches a product surface ion treatment unit. The ion treatment unit controls an ion beam electric current and produces plasma cations using gas supplied from an atmospheric gas supply unit (60), and the plasma ions are evenly scanned onto the product surfaces. The surface-treated molded product passes through a second impurity removing unit and is fed to the product loading and discharging unit, at which the jig exchanges the existing product for a new product.

Abstract: The present invention relates to a filter, and more particularly, to a tracking filter for selecting a channel of a wideband frequency. The tracking filter for selecting a channel of a wideband frequency, which is for increasing the selectivity of a wideband frequency, includes: a first tracking portion for filtering and amplifying a specific frequency band while converting a low input impedance of the input terminal of the tracking filter into a high impedance; a second tracking portion for maintaining the high impedance of the first tracking portion, and for filtering and amplifying the specific frequency band while increasing the selectivity Q of a frequency outputted from the first tracking portion; and a third tracking portion for filtering the specific band wherein has low input impedance and high output impedance.