Abstract: The present disclosure relates to a system capable of increasing the accuracy of a prediction result when predicting a user drop-out rate or predicting a correct answer probability of a user in an online learning environment, and further relates to an operation method of the system. A system according to the present disclosure may include a plurality of encoder neural networks and a plurality of decoders, and may input question information to a kth encoder neural network and input response information to kth decoder neural network to learn the system, thereby predicting the user drop-out rate information and the users correct answer probability information with higher accuracy on the basis of the learned system.

Abstract: The present disclosure relates to a novel organic compound which has excellent thermal stability, electron transporting ability, and light emitting ability, and to an organic EL device containing the same. As the organic compound is used in an organic material layer of the organic EL device, the thermal stability, luminous efficiency, driving voltage, and life of the device can be improved.

Abstract: A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.

Abstract: A hierarchical fault classification method for a fuel cell system, a multi-stage fault diagnosis method therefor, and a fault diagnosis device therefor are disclosed. The fuel cell system is divided into a subsystem, a component, and an element step by step. The multi-stage fault diagnosis method includes detecting a subsystem, a fault of which occurs, in the fuel cell system composed of a plurality of subsystems and detecting an upper-level component, which causes the fault, among upper-level components included in the subsystem, the fault of which occurs, using measurement data and a control signal.

Abstract: An integrated thermal management module for a vehicle includes a multi-channel including a plurality of valve spaces and a plurality of coolant channels communicating with the valve spaces and disposed around the valve spaces, a plurality of valve bodies inserted into the valve spaces, respectively, and configured to open and close the coolant channels around the valve spaces of the multi-channel upon operation, and a plurality of pumps coupled to the multi-channel. The valve spaces are formed on one side of the multi-channel, the valve bodies are coupled to the one side of the multi-channel, the pumps are coupled to an opposite side of the multi-channel, and a rotation axis of each of the valve bodies and a rotation axis of each of the pumps are identical.

Abstract: A secondary battery may include: an electrode assembly in which a positive electrode, a negative electrode, and a separator are wound or stacked; an insulator on at least one of an upper portion and a lower portion of the electrode assembly; and a battery case configured to accommodate the electrode assembly, the insulator, and an electrolyte and sealed by a cap assembly, wherein the insulator includes: a peripheral portion having a disk ring shape and made of a rigid material; and a central portion extending inward from an inner circumferential surface of the peripheral portion and including a textile fabric having high-temperature resistance.

Abstract: A cooling system for temperature control may include a first cooling passage in which a plurality of first variable valves and a heat generating component are deployed; a second cooling passage in which a plurality of first variable separating pipes cross-connected to the plurality of first variable valves, respectively, a battery, a heater configured to raise a temperature of the battery, and a battery chiller configured to cool the battery are deployed; a temperature sensor configured to detect operating temperatures of the heater and the battery chiller; and a controller configured to operate the plurality of first variable valves by determining whether the operating temperatures are within a specific range.

Abstract: A learning content evaluation apparatus includes a problem information processing unit configured to generate a problem embedding vector on the basis of problem information included in pre-collected problem content; an artificial intelligence (AI) model training unit configured to generate AI learning information including a weight determined using a result of training an AI model on the basis of the problem embedding vector and a user embedding vector, in which solution result data of a user for the pre-collected problem content is reflected; and a correct answer probability prediction unit configured to calculate correct answer probability information about a probability of being answered correctly by the user for the added problem, on the basis of a problem embedding vector of the added problem content and the AI learning information.

Abstract: A learning content recommendation system according to an embodiment includes: a solution result data collection unit configured to communicate with a user terminal in a wired or wireless manner to collect solution result data for a problem solved by a user; a latent factor calculation unit configured to calculate one or more latent factors serving as a basis element for predicting the probability of a correct answer from the solution result data; and an embedding performance unit configured to generate, from discrete values of the solution result data, an initial embedding vector including consecutive numbers graspable by an artificial neural network on the basis of the latent factors, and weight-adjust the initial embedding vector to determine the weight-adjusted initial embedding vector as an imbedding vector to be used for training the artificial neural network.

Abstract: Provided is a method for manufacturing a membrane-electrode assembly. The method includes forming an electrode layer, preparing a porous support layer, and positioning the electrode layer on each of both surfaces of the porous support layer and hot-pressing the electrode layer positioned on the both surfaces. The forming of the electrode layer incudes forming a functional layer including a hydrogen ion conductive binder resin on at least a portion of an electrode catalyst layer, and forming an electrolyte layer on at least a portion of the functional layer. The preparing of the porous support layer includes performing a pretreatment process by impregnating the porous support layer with a pretreatment composition, and the performing of the pretreatment process includes dipping the porous support layer in a first pretreatment composition and then drying the porous support layer, and dipping the porous support layer after drying in a second pretreatment composition.

Abstract: An integrated thermal management system for vehicles includes: a first cooling line; a second cooling line; a refrigerant line; and a bypass line configured to diverge from the second cooling line, to be connected to a chiller, and to allow a coolant to bypass a second radiator and to circulate between a high-voltage battery and the chiller.

Abstract: The present invention relates to a secondary battery, in which a sealing property is improved, and a method for manufacturing the same. The secondary battery includes: a can member having an opening; a top cap assembly sealing the opening; a gasket insulating the opening from the top cap assembly; and a hot melt applied to a surface of the gasket, wherein the hot melt has fluidity and viscosity at a predetermined temperature or more and is hardened at a temperature less than the predetermined temperature.

Abstract: A display apparatus displaying content corresponding to an installation location and a server providing content considering the installation location of the display apparatus are provided. The display apparatus includes: a display; a communication interface configured to communicate with an external server; and a processes configured to control the communication interface to receive, from the external server, content including an element with a large number of expected viewers identified based on at least one of a number of viewers or an installation location, and control the display to display the received content.

Abstract: A heating assembly for a massage chair, wherein a heating element is separately operated. The heating assembly according to an embodiment having a first bracket with a plurality of massage balls rotatably mounted to the first bracket. A massage assembly is fixed to the first bracket and can perform at least one of up-and-down and left-and-right motions. A second bracket is mounted to the massage assembly or the first bracket A support part inserted at one end thereof into the second bracket. A heating element is mounted to the support part and an airbag is fixed to the support part so as to be opposite to the heating element. Wherein the heating assembly is mounted inside the backrest of a massage chair.

Abstract: The disclosed secondary battery is capable of preventing a short-circuit pressure at which the safety vent is ruptured from being reduced due to deformation of the safety vent during assembly of the battery. The secondary battery of the present invention includes a can member accommodating an electrode assembly and a top cap assembly covering an opening of the can member. A safety vent is provided in the top cap assembly to discharge a gas when an inner pressure of the can member increases, wherein the safety vent includes a main body and a bending unit, in which an outer edge of the main body is bent, and wherein a buffering space is defined between the bending unit and the main body.

Abstract: The present invention relates to a nail lacquer composition containing at least one antifungal agent as a pharmacologically active ingredient. The present invention has an excellent penetrating effect of a drug in skin areas where the drug is applied because of needing treatment and, specifically, in fingernails by containing a polymer material which forms a specific film, and a penetration enhance, is convenient for management after locally applying the drug to a treatment site, and has excellent storage stability of the drug.

Abstract: A method is provided for operating a sleep mode of a massage chair, which is capable of implementing a sleep mode according to progressive muscle relaxation, and a massage chair for the method is also provided.

Abstract: The present invention relates to a user knowledge tracing method with more improved accuracy, and an operating method for a user knowledge tracing system including a plurality of encoder neural networks and a plurality of decoder neural networks includes: inputting exercise information to a k-th encoder neural network and inputting response information to a k-th decoder neural network; generating query data, which is information on an exercise for which a user is to predict a correct answer probability, by reflecting a weight to the response information and generating attention information to be used as a weight for the query data by reflecting the weight to the exercise information; and training the user knowledge tracing system by using the attention information as the weight for the query data.

Abstract: An electronic device includes a display configured to display at least one content, a pressure sensor configured to sense a touch input having a pressure value of a specified value or more, a memory, and a processor operatively connected to the display, the pressure sensor, and the memory. When the touch input occurs in a first screen of the display, the processor is configured to determine an input location of the touch input, to verify content displayed at a display location of the first screen corresponding to the input location, to create a widget including information associated with the content, and to output the created widget to a second screen of the display.

Abstract: A cylindrical battery cell includes a jelly-roll type electrode assembly, configured to have a structure in which a positive electrode and a negative electrode are wound in a state in which a separator is disposed between the positive electrode and the negative electrode; a cylindrical battery case having no beading part; a cap assembly located at the open upper end of the cylindrical battery case, the cap assembly including a safety vent configured to rupture in order to exhaust gas when pressure in the battery case increases; a gasket mounted so as to surround the outer circumference of the safety vent in order to maintain insulation between the cap assembly and the cylindrical battery case; and a washer for fixing the cap assembly to the cylindrical battery case, the washer coupled to an upper surface of an outer circumferential portion of the open upper end of the cylindrical battery case.