Abstract: Disclosed herein is a disinfection robot. The disinfection robot includes a body provided with an outlet, a fan provided inside the body, a fan motor configured to rotate the fan, a wheel provided under the body, a wheel motor configured to rotate the wheel, a three-dimensional camera having a forward field of view of the body and configured to capture a three-dimensional image, and a processor configured to control the fan motor to rotate the fan to discharge air through the outlet and control the wheel motor to rotate the wheel to move the body based on the three-dimensional image.

Abstract: Disclosed are an apparatus and method for electing a committee node in a blockchain. The apparatus for electing a committee node in a blockchain is configured to transmit a staking transaction including validator information to a blockchain system to register a validator node, generate a draw pool for electing a committee node based on the validator information, change entries of the draw pool using a predefined shuffling algorithm, select a preset number of top entries as votes of a committee member from among the entries of the shuffled draw pool, and elect, as the committee node, the validator node that has acquired votes of a committee.

Abstract: Disclosed herein is an apparatus and method for synchronizing a block in a blockchain network. The apparatus synchronizes node information of existing participating nodes connected to a blockchain network by joining the blockchain network, determines synchronization target blocks by calculating the current section of a blockchain using an agreed-upon block received from the existing participating nodes, receives a block header of each section and the segment hash table of a snapshot that are verification data for verifying synchronization target data for the synchronization target blocks from participating nodes that are not connected as peers, among the existing participating nodes, generates a snapshot by receiving snapshot segments and the blocks of the current section, which are the synchronization target data, from participating nodes connected as peers, among the existing participating nodes, verifies the snapshot generated from the snapshot segments, and synchronizes the verified snapshot.

Abstract: Disclosed herein is a method for adding an additional chain to a blockchain. The method includes depositing, by a node of the blockchain, an asset corresponding to the additional chain; selecting the node as one of consensus nodes for connecting an additional block to the additional chain based on a share value corresponding to the asset; and performing, by the node, distributed consensus for connecting the additional block. Here, nodes constituting the blockchain include major shareholder nodes for processing transactions.

Abstract: Disclosed herein is a disinfection robot. The disinfection robot includes a body provided with an outlet, a fan provided inside the body, a fan motor configured to rotate the fan, a wheel provided under the body, a wheel motor configured to rotate the wheel, and a processor including geographical map data corresponding to a disinfection space including a plurality of zones and air quality map data indicating air quality of the plurality of zones, and configured to control the fan motor to rotate the fan to discharge air through the outlet and control the wheel motor to rotate the wheel to move the body based on the geographical map data and the air quality map data.

Abstract: Disclosed herein are an air cleaning and disinfection robot and a method of operating the same. The air cleaning and disinfection robot includes a driving unit configured to move autonomously in a target space, a plurality of air conditioning modules configured to manage air quality in the target space and detachably provided on the driving unit, a station on which the plurality of air conditioning modules are mounted, a docking unit configured to couple and separate the driving unit and each of the air conditioning modules to and from each other, and a detection unit configured to detect an operation environment of the target space, wherein the driving unit, based on information obtained by the detection unit, may selectively couple to and move with any one of the plurality of air conditioning modules.

Abstract: A smart drilling system includes a terminal configured to map a design space to an actual space and having perforation location information in the design space, a drilling machine including a drill for perforation and configured to perform perforation in the actual space under control of the terminal based on the perforation location information, and a total station configured to acquire location information of a reference point in the actual space for mapping the design space to the actual space and location information of the drilling machine in the actual space, and to transmit the location information of the reference point in the actual space and the location information of the drilling machine to the terminal, wherein the terminal recognizes and displays a perforable region or a perforable point at a current position of the drilling machine.

Abstract: A quantization device includes: a trellis-structured vector quantizer which quantizes a first error vector between an N-dimensional (here, “N” is two or more) subvector and a first predictive vector; and an inter-frame predictor which generates a first predictive vector from the quantized N-dimensional subvector, wherein the inter-frame predictor uses a predictive coefficient comprising an N×N matrix and performs an inter-frame prediction using the quantized N-dimensional subvector of a previous stage.

Abstract: The present invention relates to an apparatus and method for encoding and decoding an image by skip encoding. The image-encoding method by skip encoding, which performs intra-prediction, comprises: performing a filtering operation on the signal which is reconstructed prior to an encoding object signal in an encoding object image; using the filtered reconstructed signal to generate a prediction signal for the encoding object signal; setting the generated prediction signal as a reconstruction signal for the encoding object signal; and not encoding the residual signal which can be generated on the basis of the difference between the encoding object signal and the prediction signal, thereby performing skip encoding on the encoding object signal.

Abstract: A smart drilling system includes a terminal configured to map a design space to an actual space and having perforation location information in the design space, a drilling machine including a drill for perforation and configured to perform perforation in the actual space under control of the terminal based on the perforation location information, and a total station configured to acquire location information of a reference point in the actual space for mapping the design space to the actual space and location information of the drilling machine in the actual space, and to transmit the location information of the reference point in the actual space and the location information of the drilling machine to the terminal, wherein the terminal recognizes and displays a perforable region or a perforable point at a current position of the drilling machine.

Abstract: A smart drilling system includes a terminal configured to map a design space to an actual space and having perforation location information in the design space, a drilling machine including a drill for perforation and configured to perform perforation in the actual space under control of the terminal based on the perforation location information, and a total station configured to acquire location information of a reference point in the actual space for mapping the design space to the actual space and location information of the drilling machine in the actual space, and to transmit the location information of the reference point in the actual space and the location information of the drilling machine to the terminal, wherein the terminal recognizes and displays a perforable region or a perforable point at a current position of the drilling machine.

Abstract: A smart drilling system includes a terminal configured to map a design space to an actual space and having perforation location information in the design space, a drilling machine including a drill for perforation and configured to perform perforation in the actual space under control of the terminal based on the perforation location information, and a total station configured to acquire location information of a reference point in the actual space for mapping the design space to the actual space and location information of the drilling machine in the actual space, and to transmit the location information of the reference point in the actual space and the location information of the drilling machine to the terminal, wherein the terminal recognizes and displays a perforable region or a perforable point at a current position of the drilling machine.

Abstract: The present invention relates to an etchant for etching metal wiring, and the metal wiring etchant according to the present invention includes hydrogen peroxide at about 5 wt % to about 15 wt %, an oxidant at about 0.5 wt % to about 5 wt %, a fluoride-based compound at about 0.1 wt % to about 1 wt %, a nitrate-based compound at about 0.5 wt % to about 5 wt %, and a boron-based compound at about 0.05 wt % to about 1 wt %.

Abstract: Provided is a bolt assembly for a wiper device of a vehicle. The bolt assembly includes: a damping member in which a penetration hole is formed and that is detachably coupled to an assembly unit; a bush that correspondingly fits a penetration hole; a bolt member that is disposed to penetrate a hollow of the bush; a washer that is assembled to the bolt member; and a separation prevention member that is assembled to the bolt member to prevent the bolt member from being separated to an upper side of the hollow, wherein the separation prevention member comprises: a flange portion that is caught on the lower surface of the bush; and a pressure portion that extends from the flange portion toward the longitudinal direction of the bolt member.

Abstract: An etching composition that includes, based on the total weight of the etching composition, from about 0.05% to about 15% by weight of a halogen-containing compound, from about 0.1% to about 20% by weight of a nitrate compound, from about 0.1% to about 10% by weight of an acetate compound, from about 0.1% to about 10% by weight of a cyclic amine compound, from about 0% to about 50% by weight of a polyhydric alcohol, and a remainder of water.

Abstract: A corpuscle separation chip is presented, which is capable of separating plasma from blood using capillary forces without causing leakage of the blood in undesired directions. The corpuscle separation chip may include an upper board for securing a membrane such that one or more edges maintain non-contact, where a portion of a channel is formed in the upper board to provide a path causing plasma components separated by the membrane from blood to move in one direction; and a lower board in which another portion of the channel is formed, where the lower board is configured to join with the upper board to form the channel, and the lower board is configured to cause the plasma components to move along the channel due to capillary forces at a position corresponding to one side of a lower surface of the membrane.

Abstract: Disclosed is a microfluidic device comprising a microchannel through which fluid can flow. Protrusions are formed on the bottom surface of the microchannel. The microfluidic device increases detection sensitivity by improving optical characteristics and enhances the reactivity of biochemical reaction by slowing down the velocity of fluid flowing inside the microchannel.

Abstract: The present invention relates to an etchant for etching metal wiring, and the metal wiring etchant according to the present invention includes hydrogen peroxide at about 5 wt % to about 15 wt %, an oxidant at about 0.5 wt % to about 5 wt %, a fluoride-based compound at about 0.1 wt % to about 1 wt %, a nitrate-based compound at about 0.5 wt % to about 5 wt %, and a boron-based compound at about 0.05 wt % to about 1 wt %.