Abstract: Provided is a blockchain management apparatus comprising at least one hardware processor configured to implement a block generation order control unit which prevents a block generation node of a plurality of blockchain nodes from generating a new block of a blockchain in response to a determining, by the blockchain management apparatus, that the new block is a block generated by the block generation node within a unit section, wherein the unit section corresponds to a preset number of blocks measured from a current block corresponding to a current block height of the blockchain, and the blockchain management apparatus manages a permission-based blockchain network including the plurality of blockchain nodes.

Abstract: A blockchain-based method is described which is related to transferring electronic currency from a payer to a payee. In some embodiments, a first process, a second process and a third process are performed. The first process includes receiving a processing request for a target transaction from a terminal of a payer, and transferring the processing request to a first blockchain node among a plurality of blockchain nodes. When a verification result indicates that the target transaction is valid, the method proceeds to performing the second and third processes. The second process includes transferring electronic currency from an electronic wallet of the payer to an electronic wallet of the payee. The third process includes recording data for the target transaction in a new block, and spreading the new block over the blockchain network. In some embodiments, the second process and the third process are performed in parallel.

Abstract: A rollable display device includes a rollable structure including a plurality of unit structures, the rollable structure being rollable and unrollable based on the unit structures, and a display panel structure attached to the rollable structure, wherein respective widths of the unit structures increase in a direction from a first side of the rollable structure to a second side of the rollable structure, the first side of the rollable structure being opposite to the second side of the rollable structure, and wherein each of the unit structures includes a metal plate, the metal plate being bent by a bending limit angle in a direction in which the rollable structure is rolled, and a magnetic object on a side region of the metal plate, the magnetic object being magnetically coupled to an adjacent metal plate.

Abstract: A location determining method 200 for sensor apparatus placements in building includes: a step in which a first measuring device transmits a digitally modulated first test packet through a specific channel at a first location in a building (210); a step in which a second measuring device receives the first test packet and transmits a first echo back signal through the specific channel at a second location in the building (220); a step in which the first measuring device receives the first echo back signal transmitted from the second measuring device and measures a first channel quality of the specific channel based on the first echo back signal (230); a step in which the first measuring device transmits a digitally modulated second test packet through the specific channel (240); a step in which the second measuring device receives the second test packet and transmits a second echo back signal through the specific channel (250); and a step in which the first measuring device receives the second echo back signa

Abstract: An engine torque control method for a vehicle according to the present disclosure includes: sensing an engagement state of a clutch of the vehicle; calculating a slip index according to engine torque, engine revolutions per minute (RPM), clutch torque, and clutch RPM; and filter-controlling the engine torque based on the calculated slip index and the sensed engagement state of the clutch.

Abstract: A display device includes a substrate including a display area and a non-display area, a pixel part in the display area of the substrate to display an image, a first encapsulation layer disposed over and covering at least part of the pixel part, and a second encapsulation layer disposed over the first encapsulation layer and substantially covering the entire extent of the first encapsulation layer, wherein the second encapsulation layer comprises an interpenetrating polymer hydrogel.

Abstract: A low pressure fuel pump control system of a GDI engine may include a low pressure fuel pump primarily pressurizing fuel supplied from a fuel tank, a high pressure fuel pump secondarily pressurizing fuel from the low pressure fuel pump, a low pressure fuel pump pressure sensor and a high pressure fuel pump pressure sensor detecting fuel pressure of the low pressure fuel pump and the high pressure fuel pump, and a fuel supply pressure controller setting a final target pressure of the low pressure fuel pump by correcting a reference pressure, wherein the reference pressure is corrected by a low pressure correcting pressure according to temperature of the low pressure fuel pump and a correction pressure.

Abstract: Disclosed herein is a flexible display device, including: a substrate that comprises a first surface and a second surface which is an opposite surface to the first surface; a light-emitting device disposed on the first surface; a reduction layer disposed on the second surface; and a barrier layer disposed between the second surface and the reduction layer.

Abstract: An exemplary embodiment provides a display device including: a display panel configured to include a first area, and a second area and a third area respectively disposed at opposite sides of the first area in a first direction; a first roller unit configured to wind the second area thereon; and a second roller unit configured to wind the third area of the display panel in an opposite direction to that of the first roller unit, wherein a distance between the first roller unit and the second roller unit which are separated from each other in the first direction can be adjusted.

Abstract: A sliding display device includes a housing, a flexible display panel, a first roller, and a second roller. The housing includes a display region between a first edge region and a second edge region. The distance between the first and second edge regions changes as the housing is expanded and contracted. The flexible display panel slides into and out from the housing through the first and second edge regions as the housing expands and contracts. The first and second rollers guide panel regions into and out of empty spaces in the housing. An assistant roller assists in moving one of the panel regions along a non-intersecting path.

Abstract: A computing device supports pull printing by using a mobile terminal. The computing device may include a user interface unit configured to receive an input selecting a print job and a printing method; a communication unit configured to transmit or receive data; a mobile search management unit configured to search for an available mobile terminal if pull printing by using a mobile terminal is selected as the printing method; a printer driver configured to render print data corresponding to the selected print job into a printable format file; a data transmission management unit configured to transmit the rendered print data to a found mobile terminal by using the communication unit; and a controller.

Abstract: A rollable display device includes a rollable structure including a plurality of unit structures, the rollable structure being rollable and unrollable based on the unit structures, and a display panel structure attached to the rollable structure, wherein respective widths of the unit structures increase in a direction from a first side of the rollable structure to a second side of the rollable structure, the first side of the rollable structure being opposite to the second side of the rollable structure, and wherein each of the unit structures includes a metal plate, the metal plate being bent by a bending limit angle in a direction in which the rollable structure is rolled, and a magnetic object on a side region of the metal plate, the magnetic object being magnetically coupled to an adjacent metal plate.

Abstract: A rollable display device includes a roller, a display panel configured to be wound around the roller in a wound-up configuration and to display an image in an unwound configuration, a housing configured to house the display panel in the wound-up configuration and the roller, and a roller controller connected to the roller and configured to change a radius of the roller.

Abstract: A rollable display device includes a roller, a rollable display that is rollable onto the roller in a first direction, and a plurality of thin plates positioned at a rear surface of the rollable display, the thin plates being rollable onto the roller in the first direction along with the rollable display.

Abstract: An organic light emitting device includes a substrate. An organic light emitting diode is disposed on the substrate. A thin film encapsulation layer is disposed over the organic light emitting diode. The thin film encapsulation layer includes at least one organic layer. An organic passivation layer is disposed directly on the thin film encapsulation layer. The organic passivation layer has a smaller Young's modulus than the organic layer of the thin film encapsulation layer.

Abstract: A manufacturing method of a display substrate, including preparing a carrier substrate; preparing a mixture of an organic material, an inorganic particle, and solvent; coating the mixture on the carrier substrate; forming a sacrificial layer including the inorganic particle in the organic material by curing the mixture; forming a barrier layer on the sacrificial layer; forming a display substrate on the barrier layer; and separating the barrier layer and the display substrate from the carrier substrate by applying a laser to the sacrificial layer.

Abstract: Disclosed herein is a flexible display device, including: a substrate that comprises a first surface and a second surface which is an opposite surface to the first surface; a light-emitting device disposed on the first surface; a reduction layer disposed on the second surface; and a barrier layer disposed between the second surface and the reduction layer.

Abstract: An engine torque control method for a vehicle according to the present disclosure includes: sensing an engagement state of a clutch of the vehicle; calculating a slip index according to engine torque, engine revolutions per minute (RPM), clutch torque, and clutch RPM; and filter-controlling the engine torque based on the calculated slip index and the sensed engagement state of the clutch.

Abstract: A pull printing method, apparatus and system are provided. The pull printing system includes a mobile terminal, a client that discovers the mobile terminal by using a phone number according to a print command of a user and transmits rendered print job data to the mobile terminal, and an image forming apparatus that, when connected to the mobile terminal, receives the print job data from the mobile terminal and performs printing.