Abstract: A blockchain based data management method performed by a computing device according to an embodiment of the present disclosure includes recording a deletion event for off-chain data and time information of the deletion event in a blockchain network, and selectively deleting the off-chain data based on a validity verification result calculated for the time information, wherein the validity verification result is calculated using a time-consensus algorithm of the blockchain network.

Abstract: The present disclosure provides an electronic device, including a flexible display, a frame part configured to support the flexible display and comprise a first frame and a second frame disposed so as to be slidable with respect to the first frame, a driving part configured to change a shape of the flexible display based on a relative position between the first frame and the second frame, and a controller, wherein the controller performs a designated operation in response to reception of an input signal. Other example embodiments are possible.

Abstract: A data driver, a multi-channel sensing circuit and a sensing method thereof are provided. A multi-channel sensing circuit, where a configuration of a sample/hold circuit part is simplified to decrease a circuit area, and a sensing method of the multi-channel sensing circuit are provided. The multi-channel sensing circuit may include a first sample/hold circuit sampling and outputting a first sensing voltage, a second sample/hold circuit sampling and outputting a second sensing voltage, a share sample/hold circuit sampling and outputting a reference voltage, and an amplification part differential-amplifying the first sensing voltage output from the first sample/hold circuit and the reference voltage output from the share sample/hold circuit and differential-amplifying the second sensing voltage output from the second sample/hold circuit and the reference voltage output from the share sample/hold circuit.

Abstract: Provided are a cryogenic steel plate and a method for manufacturing the same, the cryogenic steel plate comprising, in wt %, 0.04 to 0.08% carbon (C), 8.9 to 9.3% nickel (Ni), 0.6 to 0.7% manganese (Mn), and 0.2 to 0.3% silicon (Si), and 50 ppm or less of P, 10 ppm or less of S, and the remainder in iron (Fe) and various unavoidable impurities, and the microstructure at a ¼t location of the steel plate, where t is a thickness of the steel plate, comprising, in % surface area, 10% or more of tempered bainite, 10% or less of residual austenite, and the remainder of tempered martensite.

Abstract: The present invention includes a fuel injection amount sensor for detecting an injection amount of oil, a pretreatment desulfurization agent injection amount sensor for detecting an injection amount of a pretreatment desulfurization agent, and a control panel for controlling and monitoring the injection amount of the pretreatment desulfurization agent so that the predetermined desulfurization agent is mixed with the fuel in a predetermined mixing ratio. The fuel injection amount sensor is disposed on a fuel supply line between a fuel tank and a marine engine, and the pretreatment desulfurization agent injection amount sensor is disposed between a downstream fuel supply line installed downstream of the fuel injection amount sensor and a pretreatment desulfurization agent tank.

Abstract: Provided according to a preferable aspect of the present invention are a low-temperature steel material having excellent toughness in a welding portion thereof and a manufacturing method therefor, the low-temperature steel material comprising, by weight %, 0.02-0.06% of C, 6.0-7.5% of Ni, 0.4-1.0% of Mn, 0.02-0.15% of Si, 0.02-0.3% of Mo, 0.02-0.3% of Cr, 50 ppm or less of P, 10 ppm or less of S, 0.005-0.015% of Ti, 60 ppm or less of N, with a Ti/N weight % ratio of 2.5 of 4, and the balance of iron (Fe) and other inevitable impurities; and having: an effective grain size of 50 micrometers or less, with a boundary angle found to be 15 degrees or greater as measured by EBSD in an area of a fusion line (FL)-FL+1 mm in a weld heat-affected zone of a weld portion welded at a heat input of 5-50 kJ/cm; and an impact toughness of 70 J or higher at ?196° C. as measured in an area of fusion line (FL)-FL+1 mm.

Abstract: A method of manufacturing a gas cylinder according to an embodiment of the present invention may include applying a sealant to at least a portion of inner surface of a hollow spindle; inserting a cylinder assembly contacting the inner surface of the spindle through an inlet of the spindle and forming a sealant film on an inner surface of the spindle by frictionally applying the sealant to the inner surface of the spindle; and hardening the sealant film to form a cured film cylinder in contact with the inner surface of the spindle.

Abstract: A chip antenna module array includes a connection member and chip antenna modules mounted on the connection member. Each chip antenna module includes: a first patch antenna dielectric layer; a feed via extending through the first patch antenna dielectric layer; and a patch antenna pattern disposed on an upper surface of the first patch antenna dielectric layer and configured to be fed from the feed via. At least one chip antenna module includes: a ground pattern disposed on a lower surface of the first patch antenna dielectric layer; a chip-antenna feed line including a second part disposed on a lower surface of the ground pattern, and electrically connecting a connection member feed line to the feed via; a first feed line dielectric layer disposed on a lower surface of the second part; and a solder layer disposed on a lower surface of the first feed line dielectric layer.

Abstract: Provided is a combination valve unit having an improved structure and capable of performing both a pressure relief function for cooling and a pressure relief function for dehumidification. In addition, disclosed is a vehicle heat pump system capable of improving dehumidification performance by actively controlling the refrigerant flow distribution. The combination valve unit serves as a refrigerant throttling means in a vehicle heat pump system, and forms the inlet for a cooling pressure relief unit for performing indoor cooling and the inlet for a dehumidification pressure relief unit for performing indoor dehumidification, respectively.

Abstract: A multilayer electronic component includes a body comprising dielectric layers, and first and second internal electrode layers alternately stacked in a stacking direction with respective dielectric layers interposed therebetween. The first internal electrode layer includes first and second internal electrodes arranged with a first spacer interposed therebetween, and the second internal electrode layer includes third and fourth internal electrodes arranged with a second spacer interposed therebetween.

Abstract: A location verification system according to an embodiment of the present disclosure includes a plurality of base stations located in respective preset areas and transmitting, to an adjacent mobile communication device, location verification information obtained by signing GPS information on the base stations with a private key. It is possible to expect an effect of re-verifying a location of a mobile communication device, such as a drone or a smart car, at a destination, when the mobile communication device has moved to the destination based on GPS information.

Abstract: A system for predicting an adverse reaction of a patient, based on a real-time bio-signal of the patient, according to an embodiment of the disclosure, may include: a bio-signal measurement device configured to measure a bio-signal of the patient at a first time interval and transmit a measured result to a patient terminal at the first time interval; the patient terminal configured to collect the bio-signal measured at the first time interval from the bio-signal measurement device and transmit the collected bio-signal to a server at a second time interval; the server configured to receive the bio-signal from the patient terminal at the second time interval, based on the received bio-signal, identify whether a predetermined action is necessary for the patient at the second time interval, and when the predetermined action is necessary, transmit a message to a medical team terminal; and the medical team terminal configured to receive the message from the server when the predetermined action is necessary.

Abstract: Proposed is a die ejecting apparatus that uses a light-transmitting material and can prevent damage caused by pressure, and die bonding equipment including the same. The die ejecting apparatus includes an ejector body having a cylindrical shape, ejector pins provided inside the ejector body and configured to rise or fall, a hood coupled to an upper portion of the ejector body and made of a light-transmitting material in which through holes through which the ejector pins may pass are formed, and a reinforcement member disposed in a form of a mesh mounted on the hood and overlapping the through holes.

Abstract: A power tool includes a wrench head having a rotary socket, and a spanner tool mounted in the rotary socket, wherein the rotary socket grips a first component and the spanner tool grips a second components, the first and second component being adjacent.

Abstract: A power tool includes a wrench head having a rotary socket, and a spanner tool mounted in the rotary socket, wherein the rotary socket grips a first component and the spanner tool grips a second components, the first and second component being adjacent.

Abstract: An electrochemical cell comprises an anode, a cathode and an electrolyte composition, wherein the anode comprises as anode active material a combination of at least a carbon material and a silicon material; and the electrolyte composition comprises a solvent, from 0.5 wt. % to 70 wt. %, based on the total weight of the electrolyte, of a fluorinated acyclic carbonate compound, from 0.5 wt. % to 10 wt. %, based on the total weight of the electrolyte, of a fluorinated cyclic carbonate compound; and an electrolyte salt.

Abstract: Provided are a method for manufacturing a high yield and high performance mesophase pitch and a high yield and high performance mesophase pitch manufactured therefrom by hydrogenating, mesophase formation, thin film evaporation, solvent-extracting, filtering and then drying to obtain only mesogen components in flow-domained mesophase pitch and then mixing the mesogen components with an isotropic pitch as a solvent component. Further, the high yield mesophase pitch of the present disclosure exhibits high spinnability while maintaining whole anisotropy and exhibits a much higher production yield than existing mesophase pitches.

Abstract: An electrochemical cell comprises an anode, a cathode and an electrolyte composition, wherein the anode comprises as anode active material a combination of at least a carbon material and a silicon material; and the electrolyte composition comprises a solvent, from 0.5 wt. % to 70 wt. %, based on the total weight of the electrolyte, of a fluorinated acyclic carboxylic acid ester compound, from 0.5 wt. % 10 wt. %, based on the total weight of the electrolyte, of a fluorinated cyclic carbonate compound; and an electrolyte salt.

Abstract: Proposed is a pretreatment desulfurization system including a desulfurization agent storage tank for storing a liquid-phase pretreatment desulfurization agent and a metering pump for supplying the liquid-phase pretreatment desulfurization agent from the desulfurization agent storage tank to a fuel supply line through which marine fuel oil is supplied to a marine engine in a predetermined ratio. Since a fluid mixture composed of the marine fuel oil and the pretreatment desulfurization agent is supplied to the marine engine, sulfur oxides are adsorbed and removed during combustion of the fluid mixture.

Abstract: A blockchain data recording method includes determining a recording type as one of an on-chain type and an off-chain type according to a target data to be recorded in a blockchain, transmitting a first transaction proposal for recording the target data in a blockchain node configured to store an on-chain data on a blockchain to the blockchain node when the recording type is an on-chain type, and recording the target data in a storage node provided to store an off-chain data, and transmitting a second transaction proposal for storing recording information of the target data in the blockchain to the blockchain node when the recording type is an off-chain type.