Abstract: A sound vibration actuator includes: a casing having an internal space formed by an underside casing part, a side periphery casing part, and a top casing part; a first vibration assembly disposed in the internal space of the casing; a second vibration assembly disposed between the first vibration assembly and the top casing part in such a manner as to be coupled to the top casing part; an elastic member whose one surface coupled to the first vibration assembly; and a third vibration assembly disposed between the first vibration assembly and the underside casing part in such a manner as to be coupled to the underside casing part. The sound vibration actuator includes at least three or more vibration assemblies disposed therein, thereby obtaining at least three or more resonance frequencies.

Abstract: The present invention relates to a catalyst for selective hydrogenation of acetylene and a preparation method thereof. More specifically, the catalyst and preparation method maximize the catalytic reaction rate at various reaction temperatures and suppress side reactions to minimize the generation of green oil and cokes and to improve the deactivation rate of a catalyst when preparing ethylene from acetylene. Thus, the catalyst and the preparation method provide a high conversion rate of acetylene and a high ethylene production yield.

Abstract: Disclosed are a composition for depositing a thin film including an organometallic compound including strontium, barium, or a combination thereof; and at least one unshared electron pair-containing compound represented by Chemical Formula 1, a method of manufacturing a thin film using the composition for depositing the thin film, and the thin film manufactured from the composition for depositing the thin film, and a semiconductor device including the thin film.

Abstract: The present invention relates to a power and video redundancy system for a display system of a smartboard. More particularly, the present invention relates to a power and video redundancy system applied to a smartboard display system which minimizes the user's inconvenience due to the failure or damage of components and enables the manager to repair or change the parts without the user being aware of the loss or damage.

Abstract: A memory system may include: a memory device comprising a plurality of channels, a plurality of dies coupled to the respective channels, and a plurality of super blocks; and a controller suitable for controlling the memory device, wherein the controller includes: a detector suitable for searching for a first available reserved block in a first die, when a bad block has occurred in the first die which is coupled to a first channel and belongs to a first super block group, and searching for a second available reserved block in a second die which is coupled to the first channel and belongs to a second super block group when the first available reserved block is not present in the first die; and an assignor suitable for replacing the bad block with the second available reserved block when the second available reserved block is present.

Abstract: The present invention relates to an ultra-thin acoustic lens for subwavelength focusing in a megasonic range and a design method thereof. More particularly, the present invention relates to a super-oscillatory planar ultra-thin acoustic lens for subwavelength focusing in the megasonic range, which includes a plurality of concentric regions arranged in a concentric shape with reference to the center point, wherein the concentric regions include a plurality acoustic insulation region for insulating incident acoustic waves, and a plurality of transmission regions for transmitting acoustic waves, the acoustic insulation regions and the transmission regions being formed alternatively in a radial direction from the center point so as to focus incident acoustic wave energy onto a subwavelength region.

Abstract: A switching architecture provides input voltage signals from input voltage lines to a plurality of global word lines connected to word lines of a memory array in a memory device. The switching architecture includes a first switching block receiving a first set of positive voltages used to bias unselected word lines and being connected to a first output line providing a first output bias voltage, and a second switching block receiving a second set of positive voltages and a third set of negative voltages used to bias selected word lines and being connected to a second output line providing a second output bias voltage. A plurality of final switches are input connected to the first and second output lines and are output connected to a respective global word line.

Abstract: The present invention relates to a flat-plate focusing ultrasonic transducer and an acoustic lens composed of an annular array piezoelectric element and methods of manufacturing and designing thereof, more particularly to a flat-plate focusing ultrasonic transducer composed of an annular array piezoelectric element, wherein the annular array piezoelectric element has a plurality of concentric regions which is concentrically arranged in a concentric circle shape with respect to a center point, the concentric region has ring shaped sound insulation regions and piezoelectric regions which are alternatively formed in a direction from the center point to a radius direction, so as to focus a sound wave near a focal point, wherein the piezoelectric regions are composed of a piezoelectric ring that is composed of a piezoelectric material and thus excites a sound wave, the concentric region is in a shape of a flat-plate of which both sides are flat and which has a constant thickness, and each radius of the plurality o

Abstract: The present invention relates to a power and video redundancy system for a display system of a smartboard. More particularly, the present invention relates to a power and video redundancy system applied to a smartboard display system which minimizes the user's inconvenience due to the failure or damage of components and enables the manager to repair or change the parts without the user being aware of the loss or damage.

Abstract: The present invention relates to a catalyst for oxygen-free direct conversion of methane and a method of converting methane using the same, and more particularly to a catalyst for oxygen-free direct conversion of methane, in which the properties of the catalyst are optimized by adjusting the free space between catalyst particles packed in a reactor, thereby maximizing the catalytic reaction rate without precise control of reaction conditions for oxygen-free direct conversion of methane, minimizing coke formation and exhibiting stable catalytic performance even upon long-term operation, and to a method of converting methane using the same.

Abstract: A memory system includes a nonvolatile memory apparatus, and a write-same manager configured to perform a write-same operation on the nonvolatile memory apparatus, wherein the write-same manager merges a first write-same operation and a second write-same operation by comparing first operation information of the first write-same operation and second operation information of the second write-same operation.

Abstract: There are provided a memory system and an operating method thereof. A memory system includes: a plurality of storage regions, each including a plurality of memory cells; and a controller configured to provide a plurality of read retry sets, determine an applying order of the plurality of read retry sets based on characteristics of a read error occurred in a first storage region among the plurality of storage regions, and apply at least one of the read retry sets, based on the applying order, for a read retry operation performed on the first storage region.

Abstract: An analog-to-digital conversion device and analog-to-digital conversion method thereof are provided. The analog-to-digital conversion device includes an analog circuit configured to output an analog input signal, and an analog-to-digital converter configured to receive the analog input signal and configured to outputting a digital output signal corresponding to the analog input signal with the use of first and second capacitor arrays, each of the first and second capacitor arrays including a first capacitor having a calibration capacitor connected thereto and a second capacitor having no calibration capacitor connected thereto, wherein the analog-to-digital converter is configured to calibrate the capacitance of the first capacitor by providing a first calibration voltage to the calibration capacitor and is configured to output the digital output signal corresponding to the analog input signal with the use of the calibrated capacitance of the first capacitor.

Abstract: An access sheath is provided. The access sheath comprises: an outer sheath extending in one direction and having a cavity formed along a longitudinal axis of the outer sheath; and an inner sheath arranged in the cavity of the outer sheath, and having a plurality of balloons configured to expand, wherein the outer sheath includes: an outer body formed of a first material; and an elastic connection part formed of a second material which is more flexible than the first material of the outer body, and wherein a diameter of the outer sheath increases by the elastic connection part which expands according to an expansion of the balloons.

Abstract: There are provided a memory system and an operating method thereof. A memory system includes: a plurality of storage regions, each including a plurality of memory cells; and a controller configured to provide a plurality of read retry sets, determine an applying order of the plurality of read retry sets based on characteristics of a read error occurred in a first storage region among the plurality of storage regions, and apply at least one of the read retry sets, based on the applying order, for a read retry operation performed on the first storage region.

Abstract: The present invention relates to an apparatus and method for controlling automatic color calibration of a video wall by smoothly displaying an entire video on the video wall and improving user visibility. The automatic color calibration apparatus comprises a control unit configured to output the number of the plurality of video boards constituting the video wall to the display unit and store the number in a storage unit according to operation signals from the user input unit, and perform automatic color calibration for the plurality of video boards.

Abstract: A method of operating a fastening apparatus includes: a fastening apparatus preparing step of preparing a fastening apparatus including n fastening tools; a first workpiece disposing step of disposing a first workpiece having m fastening holes at one side of the fastening apparatus; a first fastening tool disposing step of disposing each of the n fastening tools above any one of the m fastening holes; and a first storage step of storing, in a control unit, positions of the n fastening tools in the first fastening tool disposing step, in which m is larger than n, and a plurality of first fastening tool disposing steps and a plurality of first storage steps are alternately performed.

Abstract: The present invention relates to an ultra-thin acoustic lens for subwavelength focusing in a megasonic range and a design method thereof. More particularly, the present invention relates to a super-oscillatory planar ultra-thin acoustic lens for subwavelength focusing in the megasonic range, which includes a plurality of concentric regions arranged in a concentric shape with reference to the center point, wherein the concentric regions include a plurality acoustic insulation region for insulating incident acoustic waves, and a plurality of transmission regions for transmitting acoustic waves, the acoustic insulation regions and the transmission regions being formed alternatively in a radial direction from the center point so as to focus incident acoustic wave energy onto a subwavelength region.

Abstract: The present disclosure relates to a catalyst for direct nonoxidative conversion of methane and a method of preparing the same, and more particularly to a method of preparing a catalyst for direct nonoxidative conversion of methane, in which a catalyst optimized for the direct conversion reaction of methane can be easily prepared without precise control of the reaction conditions for direct conversion of methane, thereby simultaneously maximizing the catalytic reaction rate and minimizing coke formation, and exhibiting stable catalytic performance even after long-term operation, and to a catalyst for direct nonoxidative conversion of methane prepared using the above method.

Abstract: A data storage device includes a nonvolatile memory device including a plurality of memory blocks and a controller for controlling the nonvolatile memory device. A plurality of management blocks includes first and second management blocks managed by the controller. The second management block stores start data and then stores integrity data. The first management block stores a storage location of the second management block. An integrity checker checks integrity of data associated with the first and second management blocks.