Abstract: Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.

Abstract: A film for manufacturing an electronic component includes a polymer layer and conductive nanowires and magnetic nanoparticles dispersed in the polymer layer.

Abstract: A button lighting module is provided including: a light guide plate which has a button through-hole formed in a thickness direction to allow a button device configured to input a command to pass therethrough and has a light refractor provided around the button through-hole to refract a light path upward; and a light source which is configured to radiate light so that the light is incident on the light guide plate through an outer peripheral side surface of the light guide plate.

Abstract: The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes treating modules having an opening for taking in and taking out a substrate and which are stacked on each other; and an air flow generating member for generating a downward airflow at each treating module, and wherein the air flow generating member includes: a pan unit configured to supply an air; a spray unit configured to be provided above the treating module and which sprays an air supplied from the pan unit; and an exhaust unit configured to exhaust an air sprayed by the spray unit to outside of the treating module.

Abstract: The present invention relates to a motor driving control system and a control method thereof. The purpose of the present invention is to provide a motor driving control system and a control method thereof, which may change electric current limiting logic, which is applied to a BLDC motor for a cooling fan, in response to an operating speed of the motor to stably protect the motor from an overload in a low-speed driving state as well as an overload in a high-speed driving state.

Abstract: Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.

Abstract: Provided is a method for converting waste plastic pyrolysis oil into light olefins with a high yield. The method includes: (1) inputting waste plastic pyrolysis oil into a reactor; (2) allowing the waste plastic pyrolysis oil to react in the reactor in the presence of a catalytic cracking catalyst containing a first metal and a second metal to form a product; and (3) recovering light olefins by separating the catalytic cracking catalyst and oil from the product obtained in step (2).

Abstract: The present disclosure provides a method and device for refining waste plastic pyrolysis oil, the method including (S1) subjecting a waste plastic pyrolysis oil feedstock to a heat treatment by charging the waste plastic pyrolysis oil feedstock into a rotary kiln reactor and increasing a temperature of the rotary kiln reactor to form a product; (S2) recovering a gas component from the product of step (S1); (S3) separating a high boiling point wax component from the recovered gas component and re-supplying the separated high boiling point wax component to the rotary kiln reactor in step (S1); and (S4) recovering refined oil from the gas component from which the high boiling point wax component is removed.

Abstract: Disclosed herein are an apparatus and method for retrieving on-chain data based on an index. The apparatus includes memory in which at least one program is recorded and a processor for executing the program. The program may include a blockchain connection manager for recording data in at least one node or retrieving data from at least one node and outputting the same by being connected to a blockchain network formed of multiple nodes, a blockchain index manager for creating and managing an index for data stored in at least one node, and a query engine for requesting storage of data resulting from a transaction in a corresponding node through the blockchain connection manager, creating an index on the stored data by interworking with the blockchain index manager, and acquiring and outputting data that is retrieved based on the index through the blockchain connection manger in response to a retrieval request.

Abstract: An embodiment vehicle headrest device includes a headrest including a pad portion configured to contact and support a sitting passenger's head and a cover portion positioned behind the pad portion, the pad portion being configured to move diagonally, a main frame coupled to a headrest stay and configured to move upwards/downwards along the headrest stay, and a motor module portion connected to the pad portion and the main frame such that, in operation, the motor module portion is configured to move an entirety of the headrest, including the main frame, upwards/downwards or to move only the pad portion diagonally.

Abstract: A display device includes a substrate having a first surface on which a light emitting element is located, a second surface on which a driving unit for driving the light emitting element is located, the second surface being opposite the first surface, and a first side surface between the first surface and the second surface, a first pad on the first surface of the substrate and electrically connected to the light emitting element, a second pad on the second surface of the substrate and electrically connected to the driving unit, and a side wiring on the first surface, the second surface, and the first side surface of the substrate to electrically connect the first pad and the second pad. The side wiring includes a first side wiring and a second side wiring spaced from each other.

Abstract: In an embodiment of the present invention, a proton conductive oxide fuel cell comprising an electrode substrate, a proton conductive oxide electrolyte layer positioned on the electrode substrate, a proton conductive oxide reaction prevention layer positioned on the electrolyte layer, and a proton conductive oxide air electrode layer positioned on the reaction prevention layer, wherein the reaction prevention layer is composed of ABO3-? structured perovskite proton conductive oxide, may be provided.

Abstract: Provided are a device and method for tagging training data. The method includes detecting and tracking one or more objects included in a video using artificial intelligence (AI), when there is an object to be split in a result of tracking the detected objects, splitting the object in object units, and when there are identical objects to be merged among split objects, merging the objects.

Abstract: An extended reality-based fire training method includes: (a) acquiring each object in a real space acquired through a stereo camera and depth information on each object; (b) reconstructing each object into a 3D mesh object based on each object and the depth information on each object; (c) simulating a virtual fire suppression training augmented reality environment after generating a virtual fire in at least one of the reconstructed 3D mesh objects, and transmitting the simulated virtual fire suppression training augmented reality environment to a head-mounted display device; and (d) operating a virtual fire extinguisher object in a virtual fire suppression training augmented reality environment according to a user manipulation of a real fire extinguisher, and extinguishing a virtual fire object by firing a virtual powder object toward the virtual fire object according to the operation of the virtual fire extinguisher object.

Abstract: A semiconductor memory device comprises a substrate; a mold structure on the substrate; a plurality of channel structures extending in the mold structure; a source layer and a source sacrificial layer between the substrate and the mold structure, wherein the source sacrificial layer is spaced apart from the source layer; and a source support layer on the source layer and the source sacrificial layer, wherein the source support layer is between the source layer and the source sacrificial layer, wherein an upper surface of the source support layer includes first and second portions extending parallel to the substrate, and a third portion that connects the first and second portions, wherein a vertical distance from an upper surface of the source layer to the first portion is smaller than a vertical distance from an upper surface of the substrate to the second portion.

Abstract: Disclosed herein is an apparatus and method for detecting an emotional change through facial expression analysis. The apparatus for detecting an emotional change through facial expression analysis includes a memory having at least one program recorded thereon, and a processor configured to execute the program, wherein the program includes a camera image acquisition unit configured to acquire a moving image including at least one person, a preprocessing unit configured to extract a face image of a user from the moving image and preprocess the extracted face image, a facial expression analysis unit configured to extract a facial expression vector from the face image of the user and cumulatively store the facial expression vector, and an emotional change analysis unit configured to detect a temporal location of a sudden emotional change by analyzing an emotion signal extracted based on cumulatively stored facial expression vector values.

Abstract: An X-ray imaging apparatus includes an imaging device configured to capture a camera image of a target; a controller configured to stitch a plurality of X-ray images of respective divided regions of the target to generate one X-ray image of the target; and a display configured to display a settings window that provides a GUI for receiving a setting of an X-ray irradiation condition for the respective divided regions, and display the camera image in which positions of the respective divided regions are displayed.

Abstract: A radio frequency (RF) weak magnetic field detection sensor includes a ferromagnetic core, a pickup coil disposed to surround the ferromagnetic core, a substrate that includes an opening, a core pad connected to the ferromagnetic core and a coil pad connected to the pickup coil, and an insulating tube interposed between the ferromagnetic core and the pickup coil. The insulating tube includes a bobbin around which the pickup coil is wound, and a core hole formed to pass through the bobbin and configured to accommodate the ferromagnetic core.

Abstract: Internal phase shifting is achieved by adding a feedback divider to a feedback loop of a phase locked loop circuit configured to determine a transmission frequency of a wireless transmission terminal and adding a phase adjustment current to a loop current. Since the phase adjustment current is applied to an adder circuit, a phase difference is maintained even when the feedback loop is in a stable state, and accordingly, an output of the feedback divider maintains the phase difference with a reference frequency as intended by the phase adjustment current applied to the adder circuit.

Abstract: A blockchain-based platform system for interworking with one machine-to-machine (oneM2M) and lightweight machine-to-machine (LWM2M) and a method of implementing a blockchain-based platform are provided. The blockchain-based platform system for interworking with oneM2M and LWM2M includes a hyperledger fabric network configured to validate chaincode called in association with a first client application and generate an event in association with the validated chaincode, and a fabric bridge gateway configured to perform interworking with an LWM2M protocol and a oneM2M platform by transmitting a request or a response corresponding to the event to a second client application.