Abstract: An exemplary embodiment of the present disclosure provides a separator for a fuel cell, which is stacked on a reaction layer including a membrane electrode assembly (MEA). The separator includes a plate body stacked on the reaction layer, a wave pattern provided on one surface of the plate body that faces the reaction layer, the wave pattern being configured to define a reaction channel disposed between the reaction layer and the plate body and provided in a first direction in which a reactant gas is supplied, so that the reactant gas flows along the reaction channel, and a land provided along a lateral end of the wave pattern and disposed to be in contact with the reaction layer, thereby obtaining an advantageous effect of improving performance and operational efficiency.

Abstract: A filter holder comprises: a plurality of filter frames disposed such that at least some thereof are adjacent to each other; and a folding member which supports filter frames, from among the plurality of filter frames, adjacent to each other so as to be rotatable with respect to each other. The folding member comprises: a folding part which has a predetermined thickness and is flexible so as to be foldable by means of rotation of the adjacent filter frames adjacent with respect to each other; and a plurality of edge parts which are connected to the respective sides of the folding part with the folding portion therebetween and rotate together with the adjacent filter frames, and wherein when viewed from a cross-section of the folding member, the edge parts may have a greater thickness than the folding part.

Abstract: A display apparatus includes a base substrate, a light emitting structure disposed on the base substrate, and a thin film encapsulation layer disposed on the light emitting structure and including at least one inorganic layer and at least one organic layer. The at least one inorganic layer includes a high density layer having a density of greater than or equal to about 2.0 g/cm3 and a low density layer having a density of less than about 2.0 g/cm3. The high density layer and the low density layer are in contact with each other.

Abstract: The present invention relates to a method and system for providing language learning services. The method of providing language learning services, according to the present invention, the method may include: activating, in response to receiving an input for acquiring a learning target image through a user terminal, a camera of the user terminal; specifying at least a portion of an image taken by the camera as the learning target image; receiving language learning information for the learning target image from a server; providing the language learning information to the user terminal; and storing, based on a request for storing of the language learning information, the language learning information in association with the learning target image, such that the learning target image is used in conjunction with learning of the language learning information.

Abstract: Provided are a method for manufacturing a single-crystal semiconductor layer. The method of manufacturing the single crystalline semiconductor layer includes performing a unit cycle multiple times, wherein the unit cycle includes a metal precursor pressurized dosing operation in which a metal precursor is adsorbed on a surface of a single crystalline substrate by supplying the metal precursor onto the single crystalline substrate while an outlet of a chamber in which the single crystalline substrate is loaded is closed such that a reaction pressure in the chamber is increased; a metal precursor purge operation; a reactive gas supplying operation in which a reactive gas is supplied into the chamber to cause a reaction of the reactive gas with the metal precursor adsorbed on the single crystalline substrate after the metal precursor purge operation; and a reactive gas purge operation.

Abstract: Provided are a dielectric material, a device including the dielectric material, and a method of preparing the dielectric material, in which the dielectric material may include: a layered perovskite compound, wherein the layered perovskite compound may include at least one selected from a Dion-Jacobson phase, an Aurivillius phase, and a Ruddlesden-Popper phase, a temperature coefficient of capacitance (TCC) of a capacitance at 200° C. with respect to a capacitance at 40° C. may be in a range of about ?15 percent (%) to about 15%, and a permittivity of the dielectric material may be 200 or greater in a range of about 1 kilohertz (kHz) to about 1 megahertz (MHz).

Abstract: An air filter comprises: a first filter frame in which a plurality of first chambers are formed; a second filter frame in which a plurality of second chambers are formed and which is arranged at the rear of the first filter frame; and a filter material which is accommodated in the plurality of first chambers and the plurality of second chambers to filter air, wherein the first filter frame and the second filter frame are arranged so that, when seen from the front, the center of each of the plurality of second chambers is out of line with the center of each of the plurality of first chambers, in the vertical direction.

Abstract: A display device includes a display panel; a first upper support member on the display panel; and a second upper support member on the display panel and spaced from the first upper support member; and a blocking member including a blocking part crossing the first upper support member and the second upper support member, a first stretchable part connected to a side of the blocking part and including a plurality of openings, a second stretchable part connected to another side of the blocking part and including a plurality of openings, a first fixing part connected to the first stretchable part, and a second fixing part connected to the second stretchable part.

Abstract: A vehicle seat reinforcement device includes a leg portion mounted on a floor panel, a seat cushion frame slidably mounted on the leg portion, and a load reinforcing structure connected between the leg portion and the seat cushion frame, wherein when a seat belt anchorage load is transferred to the seat cushion frame, the seat cushion frame is locked to the leg portion by the load reinforcing structure.

Abstract: Provided are a chromium catalyst precursor, an ethylene oligomerization catalyst including the same, and a method of preparing an ethylene oligomer using the same. More particularly, a chromium catalyst precursor which may oligomerize ethylene with high activity and high selectivity in spite of not using methylaluminoxane (MAO) or modified-methylaluminoxane (MMAO), an oligomerization catalyst including the same, and a method of preparing an ethylene oligomer using the same are provided.

Abstract: The present invention relates to a cold-water generating apparatus and a water purifier comprising same, in which: by arranging a block member to surround the outer circumferential surface of a flow path member through which fluid flows, and cooling the block member so that the fluid is cooled, thereby sufficiently lowering the temperature at which the fluid is cooled; and by arranging cooling passages respectively in a plurality of zones provided in the block member and thermally separated from one another, providing a connection pipe to allow the fluid to sequentially flow through the cooling passages, and preventing heat exchange from occurring between the fluid introduced through the connection pipe and the fluid discharged therefrom, the maximum amount of cold water can be secured, thereby improving user satisfaction.

Abstract: An optical system is provided. The optical system includes an immovable part, a second movable part, a second drive mechanism, and a second circuit mechanism. The second movable part is used for connecting to a second optical element. The second movable part is movable relative to the immovable part. The second drive mechanism is used for driving the second movable part to move relative to the immovable part. The second circuit mechanism is electrically connected to the second drive mechanism.

Abstract: A water purifier includes: a filter module having filters filtering raw water to provide purified water, and a filter connector having a filter connection passage allowing the filters to communicate with each other; and a filter housing having an open top and providing a filter accommodating space accommodating the filter module. The filter housing includes a filter fixture that is detachably coupled to one side of the filter connector, the filter fixture providing a flow path supplying the raw water to the filter module or discharging the purified water from the filter module to an outside. When the filter module accommodated in the filter accommodating space is coupled to the filter fixture, a separation distance between the filter connector and an inner wall of the filter housing facing the other side of the filter connector may be greater than an overlapping length of the filter connector and the filter fixture.

Abstract: Disclosed are an object damage inspection system and an object damage inspection method using the same. The system includes a vibration exciter for setting a vibration exciting pattern and applying a physical force to one face of the fixed test object based on the set vibration exciting pattern; a sensor contacting a portion of the test object, wherein the sensor collects a vibration signal generated from the test object when the physical force is applied thereto; and a damage determiner configured to determine whether the test object has physical damage, based on a test object measurement frequency signal and a reference object measurement frequency signal, wherein the test object measurement frequency signal includes a frequency domain signal into which the vibration signal collected by the sensor is converted.

Abstract: A water purifier that purifies water to provide purified water may include: a purified water tank accommodating the purified water; and a discharge port discharging the purified water to an outside of the water purifier. The purified water tank may include: a tank main body that provides an accommodation space for accommodating the purified water; a discharge buffer part having an inlet which communicates with the accommodation space so that the purified water in the accommodation space flows in the discharge buffer part, the discharge buffer part extending in an up-down direction; an outlet tube including an insertion portion extending downward in the discharge buffer part to discharge the purified water to the discharge port through a discharge flow path; and a gasket extending from the insertion portion to an inner peripheral surface of the discharge buffer part to reduce sloshing of the purified water in the discharge buffer part.

Abstract: An optical system is provided. The optical system includes an immovable part, a second movable part, a second drive mechanism, and a second circuit mechanism. The second movable part is used for connecting to a second optical element. The second movable part is movable relative to the immovable part. The second drive mechanism is used for driving the second movable part to move relative to the immovable part. The second circuit mechanism is electrically connected to the second drive mechanism.

Abstract: The present invention relates to an apparatus for making cold water and a water purifier including the same, and more specifically to an apparatus for making cold water which is configured such that any one of a water inlet port, which is in communication with a water inlet flow path member so that incoming water can be introduced into a case member, and a water outlet port, which is in communication with a water outlet flow path member so that outflowing water can be discharged, is arranged adjacent to a heat transfer wall of the case member, and thus, storage water in the case member flows while directly contacting the inner surface of the heat transfer wall, and thus, the cooling performance of the apparatus for making cold water can be improved, and at the same time, the storage water may sufficiently flow without remaining in the case member, thereby improving the cleanliness of the outflowing water, and a water purifier including the same.

Abstract: A water purifier may include: a filter filtering raw water to provide purified water; a discharge port through which the purified water is discharged outside; water pipes providing a flow space for the purified water to flow; a flow path module including a body part supporting the water pipes; and a tubing assembly detachably connected to the water pipes to selectively open and close at least a portion of the water pipes when connected thereto. The tubing assembly has one side connected to the filter and the other side connected to the flow path module, and the flow path module receives the purified water filtered by the filter through the tubing assembly. The flow path module may be placed above the tubing assembly, and disposed between the filter and the discharge port while overlapping at least a portion of the tubing assembly without overlapping the filter when viewed from above.

Abstract: An optical system includes an optical module with a main axis is provided. The optical module includes a fixed portion, a movable portion, and a driving mechanism. The movable portion is connected to an optical element and is movable relative to the fixed portion. The driving mechanism drives the movable portion to move relative to the fixed portion. When viewed along a direction that is parallel with the main axis, the fixed portion is a polygonal structure with a first side, a second side, a third side, and a fourth side. The first side is parallel with the third side, the second side is parallel with the fourth side, and the first side is not parallel with the second side.

Abstract: An optical system includes an optical module with a main axis is provided. The optical module includes a fixed portion, a movable portion, a driving mechanism, and a supporting assembly. The movable portion is connected to an optical element and is movable relative to the fixed portion. The driving mechanism drives the movable portion to move relative to the fixed portion. The supporting assembly is connected to the movable portion and the fixed portion. When viewed along a direction that is parallel with the main axis, the fixing portion is a polygonal structure with a first side, a second side, a third side, and a fourth side. The first side is parallel with the third side, the second side is parallel with the fourth side, and the first side is not parallel with the second side.