Abstract: A lithium secondary battery according to an embodiment of the present invention includes an electrode assembly including a separation layer, and a plurality of cathodes and a plurality of anodes separated by the separation layer and repeatedly stacked, and a gas adsorption layer coated on a single surface of an outermost anode among the plurality of anodes.

Abstract: A ferrite core according to an embodiment of the present invention includes a plurality of grains including Mn at 30 to 40 mol %, Zn at 5 to 15 mol %, and Fe at 50 to 60 mol %, and a plurality of grain boundaries disposed between the plurality of grains, wherein the plurality of grains and the plurality of grain boundaries include Co, Ni, SiO2, CaO, and Ta2O5, content of the Co and the Ni in the plurality of grains is two or more times higher than content of the Co and the Ni in the plurality of grain boundaries, content of the SiO2, the CaO, and the Ta2O5 in the plurality of grain boundaries is two or more times higher than content of the SiO2, the CaO, and the Ta2O5 in the plurality of grains, a magnetic permeability is 3000 or more, and a core loss is 800 or less.

Abstract: According to embodiments, a light-emitting display device includes a light-emitting diode that emits blue light and green light, a color conversion layer on the light-emitting diode, and a scattering absorption layer disposed between the color conversion layer and the light-emitting diode and that transmits blue light and green light.

Abstract: Disclosed are a method and apparatus for providing an instant messaging service associated with one or more item transactions. A first user interface screen associated with an item transaction may be provided in a chatroom interface of an executed messenger application. The first user interface screen may comprise an interfacing object associated with a list of user interface templates. Based on a user selection of the interface object and based at least one exposure condition associated with the list of user interface templates, at least one user interface template may be selected from the list of user interface templates for display in a second user interface screen of the executed messenger application. In a second user interface screen of the executed messenger application, a first user interface template of the at least one user interface template may be displayed.

Abstract: A display device includes a display panel having a folding axis extending in a first direction; and a panel supporter disposed on a surface of the display panel. The panel supporter includes a first layer including a first base resin and first fiber yarns extending in the first direction and dispersed in the first base resin, a second layer disposed on the first layer, the second layer including a second base resin and second fiber yarns extending in a second direction intersecting the first direction and dispersed in the second base resin, and a third layer disposed on the second layer, the third layer including a third base resin and third fiber yarns extending in the first direction and dispersed in the third base resin.

Abstract: The present invention relates to a state of charge (SOC) management system of an energy storage device, the system comprising at least one energy storage device, wherein the SOC management system of the energy storage device manages SOC of the energy storage device by performing P-f (active power-frequency) droop control on the basis of a droop coefficient, a reference frequency, and a dead band, which determine the output of each energy storage device.

Abstract: The present disclosure provides a brake apparatus comprising: a single monolithic brake shoe having a circular shape, wherein the shoe has a spacing defined therein at a predetermined location thereof; an actuator disposed in the spacing, wherein the actuator includes a hollow cylinder an a piston slidably contained in the cylinder, wherein when the actuator is activated, the spacing increases; and a brake lining lined on an outer face of the brake shoe, wherein when the spacing increases, the lining selectively contacts a brake drum, wherein the piston is step-shaped such that a braking force of the brake apparatus having the single monolithic brake shoe is substantially equal to a braking force of a brake apparatus having two individual brake shoes.

Abstract: Disclosed herein is a single shoe-type brake apparatus. The single shoe-type brake apparatus includes: an integrated sideways “U”-shaped single brake shoe configured to form an open ring shape, to be integrated into a single body, and to have a separation region on one side thereof so that it is subjected to external force in a direction where it is extended to both sides thereof; a cylinder installed in the separation region, and configured to provide the external force; and a friction material coupled to the outer circumferential surface of the brake shoe, and installed to selectively come into contact with a brake drum as the brake shoe is extended. The friction coefficient of the friction material is considerably lower than that of a common brake friction material, and a brake factor is almost identical to that of a brake apparatus having two shoes.

Abstract: The present invention relates to a state of charge (SOC) management system of an energy storage device, the system comprising at least one energy storage device, wherein the SOC management system of the energy storage device manages SOC of the energy storage device by performing P-f (active power-frequency) droop control on the basis of a droop coefficient, a reference frequency, and a dead band, which determine the output of each energy storage device.