Abstract: Provided is a method of using a plasma etching apparatus in semiconductor manufacturing, the method including using a plasma etching apparatus in semiconductor manufacturing, the plasma etching apparatus comprising a component including a composite sintered body therein, wherein the composite sintered body comprises 30 vol % to 70 vol % of yttria (Y2O3) and 30 vol % to 70 vol % of magnesia (MgO), and wherein the component has plasma resistance. In addition, provided is a method of reducing etching by plasma in a plasma etching apparatus during semiconductor manufacturing, the method including providing a plasma etching apparatus for manufacturing a semiconductor including a component including a composite sintered body, wherein the composite sintered body comprises 30 vol % to 70 vol % of yttria (Y2O3) and 30 vol % to 70 vol % of magnesia (MgO), and wherein the component has plasma resistance.

Abstract: An embodiment relates to a polymeric composition for a polythiourethane-based optical material, wherein the polymeric composition, comprising a particular additive, may appropriately adjust the reactivity of an isocyanate such that viscosity is maintained low for a predetermined period of time, and thus is capable of preparing a high-quality polythiourethane-based optical material, without a complicated purification process. Moreover, a polythiourethane-based optical material according to an embodiment has not only a uniform refractive index, but also a low yellow index, and thus may be used as a variety of plastic optical lenses, such as an eyeglass lens or a camera lens and the like.

Abstract: Disclosed are a composition for a striker cap with improved noise and separation force, a striker cap, and a method for manufacturing a striker cap. The method for manufacturing a striker cap includes: preparing a first compound by compounding a first polyamide resin and an inorganic filler; preparing a second compound by compounding a second polyamide resin and a polyolefin-based additive; blending the first compound and the second compound to obtain an admixture; and injecting the admixture.

Abstract: The present disclosure relates to a medium composition for enhancing proliferation of stem cells, comprising ethionamide, and a use thereof. It is possible, according to the present disclosure, to mass-produce highly-efficient next-generation stem cells through a simple and safe method of controlling a culturing environment, without using genetic modification or viral vectors, etc.

Abstract: The embodiments relate to a process for preparing a polythiol composition, which comprises reacting a halogen compound or an alcohol compound with thiourea to prepare a thiouronium salt solution; and adding a basic solution to the thiouronium salt solution to hydrolyze it. The hydrolysis reaction is terminated when the area of peak A in the graph measured by gel permeation chromatography of the reactant in the hydrolysis step under certain conditions is 0.5% to 8% based on the total peak area. A tetrafunctional polythiol composition having high purity can be obtained. Thus, an optical lens having excellent color, transparency, and refractive index can be obtained.

Abstract: The present invention relates to a composition for enhancing a survival rate of stem cells, including an immunosuppressant, and to a use thereof. According to the present invention, a survival rate of stem cells can be remarkably enhanced using a composition including an immunosuppressant, and a therapeutic effect of stem cells can be improved on the basis of the enhancement. The composition can overcome an immune response caused by the administration of xenogeneic cells so as to accurately verify the stability and efficacy of cells, and thus will be able to be utilized as a mesenchymal stem cell therapeutic agent that maximizes a therapeutic effect of stem cells.

Abstract: According to one embodiment, in producing polythiols in a manner similar to a conventional method, a polythiol having improved storage stability may be produced in a convenient manner by adjusting reaction conditions so as to prevent thiourea from remaining within products. In particular, the equivalent weight of thiourea to be used in a reaction may be adjusted to a predetermined range, thereby reducing the amount of unreacted thiourea, and thiourea may be removed once more in a sub sequent process, thereby effectively removing remaining thiourea while achieving a high yield. The polythiol thus produced does not contain residual thiourea, and thus does not show discoloration or cloudiness caused by precipitates even under prolonged storage or high-temperature conditions.

Abstract: Provided is a plasma etching apparatus component for manufacturing a semiconductor characterized by including a composite sintered body which contains 30 vol % to 70 vol % of yttria (Y2O3) and 30 vol % to 70 vol % of magnesia (MgO) and having plasma resistance. The plasma etching apparatus component for manufacturing a semiconductor provided in one aspect of the present invention has excellent corrosion resistance to plasma, and may have good corrosion resistance to plasma even when the composite sintered body is sintered at a relatively low relative density. In addition, the composite sintered body has a small crystal grain size and a small increase in surface roughness after etching, so that there is an effect that contaminant particles may be reduced. Furthermore, the plasma etching apparatus component for manufacturing a semiconductor has excellent strength compared to a typical plasma-resistant material, is inexpensive, and is excellent in terms of economic feasibility and utilization.

Abstract: The present disclosure is directed to a resin composition for a camera module having excellent laser transmittance and a camera module member produced using the same. In one embodiment, the resin composition for a camera module includes: 25 to 50 wt % of a polycarbonate resin; 5 to 30 wt % of a polycyclohexylenedimethylene terephthalate (PCT) resin; 30 to 50 wt % of a fibrous filler; and 0.001 to 5 wt % of a dye.

Abstract: An embodiment relates to an aromatic polythiol compound for optical materials, and the aromatic polythiol compound according to the embodiment contains a phenyl group and a large number of sulfur atoms in its polythiol structure so that a polymerizable composition and an optical material obtained therefrom have excellent optical properties such as high refractive index and low specific gravity, as well as excellent mechanical properties such as low cure shrinkage; thus, they can be advantageously used for producing various plastic optical lenses such as eyeglass lenses and camera lenses.

Abstract: A wall-climbing drone using an auxiliary arm and a method for controlling therefore are disclosed. The wall-climbing drone according to an example of embodiments includes at least one front wheel for moving a drone on a wall by being attached on one surface of a body in contact with the wall and controlling rotation by a wall-climbing motor; an auxiliary arm including a link having one degree of freedom connected to a part of the body and changing an angle and an auxiliary wheel attached to an end of the link; a power transmission system for controlling power transmission by connecting a belt between the body and the auxiliary arm and using the belt; and a controlling unit for controlling propulsion force of each of at least one propellant according to an angle between the auxiliary arm and the body in a state attached to the wall, controlling power transmission of the power transmission system, and controlling movement of the drone by controlling rotation of the motor.

Abstract: Robust laser scanner matching method and device considering a movement of a ground robot are disclosed. A scan matching method according to an embodiment of the inventive concept includes receiving two point clouds, sequentially inspecting height values until a point is within a specific height range to search for correspondence points between the two point clouds, and performing scan matching between the two point clouds based on the search result of the correspondence points.

Abstract: The embodiments relate to a process for preparing a polythiol composition, which comprises reacting a halogen compound or an alcohol compound with thiourea to prepare a thiouronium salt solution; and adding a basic solution to the thiouronium salt solution to hydrolyze it. The hydrolysis reaction is terminated when the area of peak A in the graph measured by gel permeation chromatography of the reactant in the hydrolysis step under certain conditions is 0.5% to 8% based on the total peak area. A tetrafunctional polythiol composition having high purity can be obtained. Thus, an optical lens having excellent color, transparency, and refractive index can be obtained.

Abstract: According to one embodiment, in producing polythiols in a manner similar to a conventional method, a polythiol having improved storage stability may be produced in a convenient manner by adjusting reaction conditions so as to prevent thiourea from remaining within products. In particular, the equivalent weight of thiourea to be used in a reaction may be adjusted to a predetermined range, thereby reducing the amount of unreacted thiourea, and thiourea may be removed once more in a sub sequent process, thereby effectively removing remaining thiourea while achieving a high yield. The polythiol thus produced does not contain residual thiourea, and thus does not show discoloration or cloudiness caused by precipitates even under prolonged storage or high-temperature conditions.

Abstract: The present invention relates to localization method and system for providing augmented reality in mobile devices and includes sub-sampling image data acquired from a camera in the mobile devices, and extracting image patch including line and point in low-resolution image data, matching feature pairs of point features between the image patch and previous image patch according to movement of the camera, and producing line of subpixel for the image patch, and estimating a location of the camera in the mobile devices based on difference between the produced line and estimated line by inertia.

Abstract: Provided are a mobile robot device and a control method thereof. The mobile robot device comprises: a driving unit; an image sensor; a plurality of geomagnetic sensors; a memory for storing at least one instruction; and a processor for executing at least one instruction, wherein the processor may obtain, while the mobile robot device moves by means of the driving unit, a plurality of image data through the image sensor and obtain sensing data through the plurality of geomagnetic sensors, extract a feature point from the plurality of image data and obtain key nodes on the basis of the feature point, obtain a node sequence on the basis of the sensing data, generate a graph structure that estimates a position of the mobile robot device on the basis of the key nodes and the node sequence, and correct the graph structure based on the mobile failing in position recognition.

Abstract: The present disclosure is directed to a resin composition for a camera module having excellent laser transmittance and a camera module member produced using the same. In one embodiment, the resin composition for a camera module includes: 25 to 50 wt % of a polycarbonate resin; 5 to 30 wt % of a polycyclohexylenedimethylene terephthalate (PCT) resin; 30 to 50 wt % of a fibrous filler; and 0.001 to 5 wt % of a dye.

Abstract: An apparatus and method for producing a map based on a hierarchical structure to produce a 3D high-precision map based on the hierarchical structure using a low-priced 2D laser scanner is provided. The apparatus and method produces the 3D high-precision map based on the hierarchical structure using the low-priced 2D laser scanner.

Abstract: The embodiments relate to a polythiol composition for a plastic optical lens and a polythiourethane-based plastic optical lens prepared therefrom. In the embodiments, a first polythiol compound having an ester group and a mercapto group only as a hydrogen-bondable functional group and a second polythiol compound having an ester group and a hydrogen-bondable functional group other than a mercapto group are used in an appropriate amount. Thus, it is possible to control the viscosity of a polymerizable composition at the initial stage of polymerization at a low temperature of 5 to 15° C. and to stabilize the rate of increase in the viscosity of the composition and the reaction rate thereof, thereby preventing the generation of striae, bubbles, and the like. Further, various plastic lenses such as eyeglass lenses, camera lenses, and the like having excellent appearance characteristics (without striae and bubbles) and excellent optical characteristics can be obtained from the composition.

Abstract: An embodiment relates to a polymeric composition for a polythiourethane-based optical material, wherein the polymeric composition, comprising a particular additive, may appropriately adjust the reactivity of an isocyanate such that viscosity is maintained low for a predetermined period of time, and thus is capable of preparing a high-quality polythiourethane-based optical material, without a complicated purification process. Moreover, a polythiourethane-based optical material according to an embodiment has not only a uniform refractive index, but also a low yellow index, and thus may be used as a variety of plastic optical lenses, such as an eyeglass lens or a camera lens and the like.