Abstract: Provided is a community management method including: receiving, from a first terminal, a generation request for a standby community; generating the standby community including a user of the first terminal as a participant, according to the generation request for the standby community; and generating a regular community including participants of the standby community as members in response to a number of the participants of the standby community reaching a target number of the standby community, wherein a writing function is restricted in the standby community and allowed in the regular community.

Abstract: A fire spreading prevention method in an energy storage system (ESS) composed of a plurality of battery racks including an individual battery rack fire detection step of detecting whether a fire occurs for each of the plurality of battery racks and a battery rack forced discharge step of forcibly discharging at least some of the plurality of battery racks when a fire is detected in the individual battery rack fire detection step.

Abstract: A liquid drop discharge apparatus is proposed. The liquid drop discharge apparatus includes: an inkjet head discharging ink to each of pixels of a substrate; a laser emitter coupled to the inkjet head, and emitting an aiming laser beam by which a discharged position of a liquid drop from the inkjet head to each of the pixels is aimed; a camera capturing an emitted position of the aiming laser beam on the substrate; and a position alignment unit aligning a position of the inkjet head on the basis of image data obtained from the shooting unit.

Abstract: An electronic device includes a semiconductor memory. The semiconductor memory comprises a first variable resistance element coupled between a first wiring and a second wiring, the first variable resistance element including a first variable resistance layer having a first width at a first distance from the first wiring; and a second variable resistance element coupled between the second wiring and a third wiring, the second variable resistance element including a second variable resistance layer having a second width at the first distance from the second wiring. The first width is greater than the second width.

Abstract: The present disclosure provides a method of preparing a vinyl chloride-based polymer, and the method provides excellent productivity while having reduced amount of a volatile organic compound generated so as to provide the vinyl chloride-based polymer suitable for an eco-friendly material, and improved foaming and viscosity properties of a plastisol including the prepared polymer, by adding a carbonate-based metal salt and a transition metal catalyst together, and controlling input time and amount of the transition metal catalyst.

Abstract: The present invention relates to a QoS-based mobile order processing technology which can improve mobile ordering procedure of customers and guarantee Quality of Service (QoS) above a certain level to customers in processing the mobile order which is entered on a customer's smart terminal on the go, by accurately identifying the event of customer's arrival at the shop so as to supplement the contents of the mobile order and to determine when to forward the mobile order to the shop in response to the customer's arrival. According to the present invention, there is an advantage in that the quality of service can be guaranteed through technical configuration by transacting a mobile order which is entered on the go by a customer by use of shop arrival identification.

Abstract: The present disclosure relates to a composition for preparing a vinyl chloride-based polymer and a method of preparing a vinyl chloride-based polymer using the same, and provides the composition giving excellent productivity for preparing a vinyl chloride-based polymer includes while maintaining excellent foaming and viscosity properties of a plastisol including the prepared vinyl chloride-based polymer, by including a pH regulator composed of a carbonate-based metal salt, and a transition metal catalyst in the composition, and controlling an amount of the transition metal catalyst, and controlling an amount of a reducing agent such that a trace amount or none of the reducing agent is included, and the method of preparing a vinyl chloride-based polymer using the same.

Abstract: The present invention relates to a vinyl chloride-based polymer showing high viscosity properties in a low shear region and showing viscosity and stress decreasing properties in line with the increase of a shear rate, a method for preparing the same, and a plastisol comprising the same. Since the vinyl chloride-based polymer comprises a saponified emulsifier in a specific ratio, high viscosity properties may be shown in a low shear region, and Bingham fluid flow properties may be shown, by which viscosity and stress decrease in line with the increase of a shear rate.

Abstract: An electronic device may include a semiconductor memory. The semiconductor memory may include: row lines; column lines intersecting the row lines; memory cells located in intersection regions of the row lines and the column lines, the memory cells including upper and lower electrodes; and interface layers located between the lower electrodes of the memory cells and the row lines, the interface layers having a width narrower than that of the row lines.

Abstract: The present disclosure provides a method for preparing a vinyl chloride-based polymer, the method including a step of injecting an ionizable normal salt and polymerizing a vinyl chloride monomer in the presence of one or more emulsifiers and a polymerization initiator, wherein the ionizable normal salt includes a carbonate metal salt or a sulfite metal salt, and the ionizable normal salt is continuously injected in an amount of 70 to 1200 ppm based on the total weight of the vinyl chloride monomer when a polymerization conversion rate is in a range of 0% to 20%. The method capable of preparing a vinyl chloride-based polymer suitable as an eco-friendly material, while not affecting the rate of polymerization reaction and decreasing the generation amount of total volatile organic compounds by controlling the injection time, injection amount and kind of the ionizable normal salt, is provided.

Abstract: The present disclosure provides a method for preparing a polymerization initiator composition, including (a) a step of mixing water and a water-soluble initiator to prepare an aqueous initiator solution having a concentration of 1 to 10%; and (b) a step of activating the aqueous initiator solution, wherein the step of activating is performed by (b-1) a step of heat treating the aqueous initiator solution for 0.5 to 4.5 hours at a temperature of 48 to 62° C.; and (b-2) a step of treating the aqueous initiator solution to achieve pH of 1 to 7, where the steps above are performed in no particular order.

Abstract: A multilayer ceramic capacitor includes a ceramic body including a dielectric layer, a plurality of first and second internal electrodes disposed inside the ceramic body, exposed to the first and second surfaces, and having ends exposed to the third or fourth surface, and a first side margin portion and a second side margin portion disposed on side portions of the plurality of first and second internal electrodes exposed to the first and second surfaces. A ratio Db/Da satisfies 1.00 to 1.07, inclusive, where ‘Db’ is a distance, in a stacking direction of the dielectric layer, between both end points of respective edge regions of the first side margin portion and the second side margin portion, and ‘Da’ is a distance in a central region of the ceramic body in the stacking direction.

Abstract: The present disclosure provides a composition for preparing a vinyl chloride-based polymer, including a vinyl chloride-based first seed; a vinyl chloride-based second seed; an initiator composition including a water-soluble initiator and an oil-soluble initiator; a reducing agent; and a vinyl chloride-based monomer, wherein a metal catalyst is not included in the composition, and a method for preparing a vinyl chloride-based polymer using the same.

Abstract: Provided are an energy storage system (ESS) capable of increasing precision of a fire control system to accurately determine and extinguish a fire, and a fire control method of the ESS. The ESS according to the present disclosure includes a container, a heating, ventilation and air conditioning (HVAC) system, and a fire control system, wherein the fire control system includes a fire extinguisher and a control panel, a smoke detector, a heat detector, and a flame detector mounted in the container, and a duct smoke detector mounted in a duct of the HVAC system, and wherein the control panel has a mode for operating the fire extinguisher when all of the smoke detector, the heat detector, and the flame detector detect a fire, a mode for operating the fire extinguisher when the duct smoke detector detects a fire, and a mode for operating the fire extinguisher when a manipulation button is operated.

Abstract: A container has an anti-vibration property so that the container does not shake in vibration. The container includes a bottom part, a ceiling part facing the bottom part, a sidewall part connecting the bottom part to the ceiling part, and a rack installed to be fixed in an inner space that is surrounded by the bottom part, the ceiling part, and the sidewall part.

Abstract: A substrate, a display panel, and a substrate manufacturing method are proposed. The substrate includes a base layer; partitioning walls located on the base layer and dividing the base layer into a plurality of pixel regions, and patterns located in each of the pixel regions of the base layer, and guiding spread of a liquid drop discharged to the base layer.

Abstract: A liquid drop discharge apparatus is proposed. The liquid drop discharge apparatus includes: an inkjet head discharging ink to each of pixels of a substrate; a laser emitter coupled to the inkjet head, and emitting an aiming laser beam by which a discharged position of a liquid drop from the inkjet head to each of the pixels is aimed; a camera capturing an emitted position of the aiming laser beam on the substrate; and a position alignment unit aligning a position of the inkjet head on the basis of image data obtained from the shooting unit.

Abstract: An electronic device may include a semiconductor memory. The semiconductor memory may include: row lines; column lines intersecting the row lines; memory cells located in intersection regions of the row lines and the column lines, the memory cells including upper and lower electrodes; and interface layers located between the lower electrodes of the memory cells and the row lines, the interface layers having a width narrower than that of the row lines.

Abstract: An electronic device includes a semiconductor memory. The semiconductor memory comprises a first variable resistance element coupled between a first wiring and a second wiring, the first variable resistance element including a first variable resistance layer having a first width at a first distance from the first wiring; and a second variable resistance element coupled between the second wiring and a third wiring, the second variable resistance element including a second variable resistance layer having a second width at the first distance from the second wiring. The first width is greater than the second width.

Abstract: The present invention relates to a vinyl chloride-based polymer composition and a method for producing the same, and more particularly, to a vinyl chloride-based polymer composition including a vinyl chloride-based polymer and a plasticizer, wherein the vinyl chloride-based polymer includes a higher fatty acid having 10 to 18 carbon atoms in an amount of more than 0.05 parts by weight to less than 2.0 parts by weight, based on 100 parts by weight of the vinyl chloride-based polymer.