Abstract: Disclosed is a nasal hair trimmer which removes a large amount of nose hair by safely inserting the nasal hair trimmer into a nostril using only a small number of operations. The nasal hair trimmer includes two cutting plates, each including two or three cutting heads and having a size capable of entering a nostril, wherein the two cutting plates are connected to each other by a shaft pin so as to swing while overlapping each other in a state of being parallel to each other, and wherein, when the cutting heads of the two cutting plates swing relative to each other, cutting heads neighboring each other are moved toward each other so as to cut nose hair.

Abstract: A method according to an embodiment is for recovering a valuable metal from a waste electrode material of a lithium secondary battery by using lithium carbonate. An anode-cathode mixed electrode material that has been separated by draining, crushing, screening, and sorting a waste lithium secondary battery is preprocessed. A precipitation operation performed by adding lithium carbonate (Li2CO3) to a metal melt acquired by performing sulfuric acid dissolution using sulfuric acid. A valuable metal such as nickel, cobalt, manganese, aluminum, and copper is recovered as a residue in the form of a carbonate composite, and a lithium sulfate (Li2SO4) aqueous solution including lithium is recovered as a filtrate.

Abstract: The present invention relates to a catalyst composition including an imidazolinium ion-based catalyst and an aluminum-based cocatalyst, and a method for preparing an isobutene-isoprene copolymer using the same.

Abstract: The present invention relates to a composition for treating a semiconductor substrate, and particularly to a composition for treating an edge portion of a wafer coated with polysilazane. According to the composition for treating a semiconductor substrate according to the present invention, it is possible to uniformly maintain the quality of the composition in terms of management and to uniformly treat the boundary of the wafer in terms of processing. In addition, by improving the straightness of the boundary portion where polysilazane is removed, it is possible to significantly reduce the defect rate of the product and to stably improve the productivity yield.

Abstract: The present invention relates to a composition for selectively etching silicon on a surface on which a metal film and silicon (Si) are exposed. According to the present invention, it is possible to improve etch selectivity of silicon on the semiconductor surface on which the metal film and silicon are exposed.

Abstract: The present invention relates to a composition for selectively etching silicon on a surface on which a metal film and silicon (Si) are exposed. According to the present invention, it is possible to improve etch selectivity of silicon on the semiconductor surface on which the metal film and silicon are exposed.

Abstract: The present invention relates to a silicon etching composition, and to a composition for selectively etching silicon with respect to a silicon insulating film. The etching composition according to the present invention can improve the selective etching ratio of silicon from the surface of the semiconductor on which a silicone oxide film and silicon are exposed.

Abstract: Disclosed are a method and device for managing a project by using data filtering. A project is efficiently operated by dividing a project based on a minimum unit task and designing a plurality of child projects connected in sequential order such that a plurality of child projects proceed in order.

Abstract: Disclosed are a method and device for managing a project by using a data pointer. A project is efficiently operated by dividing a project based on a minimum unit task and designing a plurality of child projects connected in sequential order such that a plurality of child projects proceed in order.

Abstract: Disclosed are a method and device for managing a project by using data merging. A project is efficiently operated by dividing a project based on a minimum unit task and designing a plurality of child projects connected in sequential order such that a plurality of child projects proceed in order.

Abstract: Disclosed are a method and device for managing a project by using cost payment time point settings. A project is efficiently operated by dividing a project based on a minimum unit task and designing a plurality of child projects connected in sequential order such that a plurality of child projects proceed in order.

Abstract: The present invention relates to a silicon etching composition, and to a composition for selectively etching silicon with respect to a silicon insulating film. The etching composition according to the present invention can improve the selective etching ratio of silicon from the surface of the semiconductor on which a silicone oxide film and silicon are exposed.

Abstract: A main server for controlling laser irradiation of a movement path of a robot, the main server including a communication unit configured to communicate with a camera module and a laser irradiation module; and a controller configured to: receive, via the communication unit, an image of a robot captured by the camera module, identify a location of the robot in the image captured by the camera module, generate a movement path of the robot based on sensing information, and transmit, via the communication unit, movement path information to the laser irradiation module for outputting the movement path to a vicinity of the robot with a laser for the robot to follow, in which the sensing information includes first information about an obstacle sensed by the camera module or second information about the obstacle sensed by the laser irradiation module.

Abstract: Provided is an etchant composition for a semiconductor substrate which may selectively etch a high-concentration doped layer of an extrinsic semiconductor, and according to the present disclosure, an etchant composition for a semiconductor substrate which, in etching an extrinsic semiconductor substrate including doped layers having different doping concentrations, may etch the high-concentration doped layer at a high selection ratio, and suppress bubble formation during an etching process to allow uniform and stable etching, an etching method using the same, and a manufacturing method of a semiconductor substrate may be provided.

Abstract: The present invention relates to a golf club reference system having improved performance in accurate hitting of a golf ball by providing the most ideal, accurate angle of a golf club at a starting point, by matching a lie angle and a socket angle when addressing. The golf club reference system of the present invention installed on a hosel installed on a club head having a hitting surface or a shaft having a handle formed in an upper portion and connected to the hosel in an lower portion, the reference system comprising: a fixing ring surrounding the hosel or the shaft, a fixing screw shaft protruding from the fixing ring in one direction; a fixing nut fixing the fixing screw shaft; a display part connected to the fixing ring through a bridge, and a color crosshair formed on an upper portion of the display part.

Abstract: Provided is a method for increasing or decreasing the number of workers and inspectors in a crowdsourcing-based project for creating artificial intelligence learning data. The method comprises the steps of: opening a new crowdsourcing-based project; setting the ratio of the number of inspectors to the number of standard workers of the project; measuring the number of current workers and the number of current inspectors participating in the project; calculating the ratio of the number of inspectors to the number of current workers of the project by using the measurement result; comparing the ratio of the number of inspectors to the number of current workers with the ratio of the number of inspectors to the number of standard workers; and, according to the comparison result, determining the decrease in the inspectors or the increase in the workers and determining the increase of the inspectors or the decrease of the workers.

Abstract: Disclosed is a method of adjusting a work unit price according to a work progress speed of a crowdsourcing-based project. The method includes setting a desired work progress speed of the project based on a predetermined work scale of the project and a target work completion period of the project before a project is opened, measuring an actual work progress speed at each predetermined period after the project is opened, and automatically adjusting the work unit price at the respective predetermined period by comparing the desired work progress speed with the actual work progress speed.

Abstract: The present invention relates to an organic borate-based catalyst including a compound represented by the following Formula 1 and a hydroxyl group-containing compound, a method for preparing an isobutene oligomer using the same and an isobutene oligomer prepared thereby: wherein R0, R1 to R4, o, p, q and r are described therein.

Abstract: An indicator-type door lock that may prevent the door lock device from being enlarged while user may intuitively identify the lock state of the door lock at the outside. An indicator-type door lock including: a handle shaft having a handle for unlocking and a push button for locking; a driving body mounted with the handle shaft; a door lock main body having a main body cover with at least one display portion displaying the locked state of the door lock to the outside, and installed in front of the driving body; an indicator member installed within the door lock main body to be pivoted to a certain radius, and being exposed through the display portion; and a turning drive member for pivoting the indicator member located within the handle shaft and rotated inside the handle shaft when the push button is pressed to pivot indicator member.

Abstract: A strainer for a fuel pump according to the present invention includes: a communicating pipe including a flow path formed to communicate with a fuel inlet of the fuel pump; a filter including an internal space in which a fuel flows and coupled to the communicating pipe so that the internal space communicates with the communicating pipe; and a rib disposed in the filter and coupled to the communicating pipe, in which the filter includes a first filtering portion extending in a length direction with respect to the communicating pipe, a connecting portion extending in a width direction at an edge of the first filtering portion, and a second filtering portion extending in the length direction at the connecting portion and spaced apart from the first filtering portion in the width direction. Therefore, the strainer may have a relatively large filtering area and a small size.