Abstract: The present invention relates to a system for applying maximum driving efficiency point of load, comprising: a motor for driving a load; an inverter for controlling the speed and the voltage of the motor; a sensor unit for measuring the magnetic flux maintaining current and the torque current of the motor; and a control unit determining the speed of the inverter and using the proportional value of the magnetic flux maintaining current and the torque current measured within a range in which the total current does not increase when the motor is driven at the determined speed, or determining the optimum voltage of the inverter at the point where the power factor becomes maximum. The motor inverter control system as described above controls both motor speed and voltage to select the lowest frequency within the permissible range and at the same time control the voltage at the water head to maximize power, this can reduce power consumption to a minimum and reduce energy consumption to a maximum.

Abstract: A method of manufacturing a semiconductor device includes forming a mold structure including alternately stacked mold insulating and sacrificial layers on a substrate, forming a vertical structure through the mold structure, forming side openings by removing the sacrificial, forming a preliminary dielectric layer in the side openings, forming a dielectric layer by heat-treating the preliminary dielectric layer, removing a surface layer of the dielectric layer, forming a first conductive layer covering the dielectric layer in the side openings, and forming a second conductive layer covering the first conductive layer and filling the side openings.

Abstract: A beam steering system of a high-gain antenna includes an antenna configured to include a printed circuit board in which an antenna element is designed, and a ground plane, wherein the printed circuit board and the ground plane may be each adhered onto upper and lower surfaces of the antenna; a paraelectric material configured to be separated from the upper surface of the antenna with a predetermined distance and is divided into a plurality of cells, whose relative permittivity varies depending on a voltage applied to a pair of thin metallic conductor patches adhered to upper and lower surfaces of each cell; and a power supply unit configured to supply the voltage to the pair of thin metallic conductor patches which are each adhered to the upper and lower surfaces of the cell to face each other.

Abstract: An apparatus for transmitting simultaneous multiple beams to targets at near and far fields includes: a communication unit consisting of a plurality of unit cells, and configured to communicate a signal or power via antennas provided in each of the unit cells; and a control unit configured to calculate a phase of a voltage applied to the antennas so as to simultaneously transmit the power or signal to the targets at the near and far fields.

Abstract: Disclosed is a composition for promoting the activity of peroxisome proliferator-activated receptor-? (PPAR-?), which contains Artemisia vulgaris extracts or Artemisia capillaris extracts as active ingredients. The composition is effective in strengthening muscles, improving endurance and memory, and preventing and alleviating the symptoms of dementia or Parkinson's disease.

Abstract: Provided is a directional monopole array antenna using a hybrid ground plane in which a plurality of monopole antennas are connected in a form of an array, wherein the monopole antennas includes: a ground plane designed to be divided into a PMC (perfect magnetic conductor) and a PEC (perfect electric conductor) such that a surface current induced in the PEC flows in a direction; and an antenna device vertically disposed in the ground plane.

Abstract: The present invention relates to a high hardness wear-resistant steel with excellent toughness and cutting crack resistance, and a method for manufacturing the same. A high hardness wear-resistant steel according to one aspect of the present invention has a composition containing, by weight ratio, 2.1 to 4.0% of manganese (Mn), 0.15 to 0.2% of carbon (C), 0.02 to 0.5% of silicon (Si), 0.2 to 0.7% of chromium (Cr), a remainder of iron (Fe) and other unavoidable impurities, has a microstructure in which prior austenite grain size is 25 ?m or less and martensite is included as a main phase, and has excellent toughness and cutting crack resistance which satisfies a condition in which Ac3-Ac1 is 100° C. or lower.

Abstract: The present invention relates to a ginseng mixed composition with improved bioavailability of saponin. Further, the present invention relates to a method for improving saponin bioavailability of a subject comprising: administering to the subject an effective amount of at least one extract selected from a Schizandra chinensis extract and a Liriope platyphylla extract that improves saponin bioavailability in the subject.

Abstract: Provided according to one embodiment of the present invention are a non-magnetic steel material and a method for manufacturing the same. The steel material comprises 15-27 wt % of manganese, 0.1-1.1 wt % of carbon, 0.05-0.50 wt % of silicon, 0.03 wt % or less (0% exclusive) of phosphorus, 0.01 wt % or less (0% exclusive) of sulfur, 0.050 wt % or less (0% exclusive) of aluminum, 5 wt % or less (0% inclusive) of chromium, 0.01 wt % or less (0% inclusive) of boron, 0.1 wt % or less (0% exclusive) of nitrogen, and a balance amount of Fe and inevitable impurities, has an index of sensitivity of 3.4 or less, the index of sensitivity being represented by the following relational expression (1): [Relational expression 1]—0.451+34.131*P+111.152*Al?799.483*B+0.526*Cr?3.4 (wherein [P], [Al], [B] and [Cr] each mean a wt % of corresponding elements), and contains a microstructure with austenite at an area fraction of 95% or greater therein.

Abstract: A method for fabricating a semiconductor device, the method including forming a mold structure on a substrate such that the mold structure includes alternately and repeatedly stacked interlayer insulating films and sacrificial films; forming a channel hole passing through the mold structure; forming a vertical channel structure within the channel hole; exposing a surface of the interlayer insulating films by removing the sacrificial films; forming an aluminum oxide film along a surface of the interlayer insulating films; forming a continuous film on the aluminum oxide film; and nitriding the continuous film to form a TiN film.

Abstract: The present invention relates to a composition for, inter alia, preventing or treating a climacteric disease, or preventing or improving a climacteric skin symptom comprising a soybean extract comprising coumestrol as an active ingredient, and more specifically relates to a composition for, inter alia, preventing or treating a climacteric disease, or preventing or improving a climacteric skin symptom comprising a germinated and fermented soybean extract comprising coumestrol as an active ingredient.

Abstract: The present invention relates to a wear resistant steel material which can be suitably used for industrial machinery, structural materials, steel materials for slurry pipes, sour steel materials, mining, transportation and storage fields, etc. in the oil gas industry which require properties such as ductility and wear resistance. More particularly, the present invention relates to a wear resistant steel material excellent in toughness and internal quality, and a method for manufacturing the same.

Abstract: The present invention relates to a composition for, inter alia, preventing or treating a climacteric disease, or preventing or improving a climacteric skin symptom comprising a soybean extract comprising coumestrol as an active ingredient, and more specifically relates to a composition for, inter alia, preventing or treating a climacteric disease, or preventing or improving a climacteric skin symptom comprising a germinated and fermented soybean extract comprising coumestrol as an active ingredient.

Abstract: An electronic device and a schedule user Interface (UI) providing method thereof are provided. The method may include arranging and displaying a plurality of items corresponding to a plurality of schedules in a line according to time information and priority information included in the plurality of items in a schedule UI, receiving a user command for inputting a new first schedule in the schedule UI, and in response to a second schedule of which time overlaps with time of the input first schedule being present among the plurality of schedules, displaying an indicator in one of a first item corresponding to the first schedule and a second item corresponding to the second schedule according to a priority of the first schedule and the second schedule.

Abstract: Provided is a stepless variable auto stroke hydraulic breaker system capable of reducing impact energy reflected in the event of an idle blow by detecting a frequency of vibrations generated when a chisel breaks objects such as bedrocks using a vibration sensor, operating according to a short stroke if the frequency of vibrations does not exceed a preset frequency, and automatically switching the short stroke into a long stroke if the frequency of vibrations exceeds the preset frequency. The breaker system includes a vibration sensor configured to detect vibrations generated when a chisel breaks rocks, a transmitter provided with the vibration sensor and configured to transmit signals generated from the vibration sensor, a receiver configured to receive the signals transmitted from the transmitter, and a stepless variable auto stroke hydraulic breaker controlled by a reception micro controller unit (MCU) of the receiver.

Abstract: A method of preparing silicon carbide according to the present invention includes reacting a silicon-containing compound with carbon dioxide, wherein a reducing agent is optionally used.

Abstract: A method of manufacturing a semiconductor device includes forming a mold structure including alternately stacked mold insulating and sacrificial layers on a substrate, forming a vertical structure through the mold structure, forming side openings by removing the sacrificial, forming a preliminary dielectric layer in the side openings, forming a dielectric layer by heat-treating the preliminary dielectric layer, removing a surface layer of the dielectric layer, forming a first conductive layer covering the dielectric layer in the side openings, and forming a second conductive layer covering the first conductive layer and filling the side openings.

Abstract: The present invention relates to an apparatus for interchanging welding tips of a spot welding gun. According to the present invention, an apparatus for interchanging welding tips of a spot welding gun comprises: a post frame provided with a connection plate on a top surface; a tip-removal means coupled at a predetermined position on one side surface of the post frame; and a tip-setting means coupled to a top surface of the connection plate.

Abstract: A beam steering system of a high-gain antenna includes an antenna configured to include a printed circuit board in which an antenna element is designed, and a ground plane, wherein the printed circuit board and the ground plane may be each adhered onto upper and lower surfaces of the antenna; a paraelectric material configured to be separated from the upper surface of the antenna with a predetermined distance and is divided into a plurality of cells, whose relative permittivity varies depending on a voltage applied to a pair of thin metallic conductor patches adhered to upper and lower surfaces of each cell; and a power supply unit configured to supply the voltage to the pair of thin metallic conductor patches which are each adhered to the upper and lower surfaces of the cell to face each other.

Abstract: An apparatus for interchanging welding tips of a spot welding gun. The apparatus replaces a welding tip installed in a robot arm and includes welding tip removal componentry combined with the robot arm, welding tip mounting structure combined with one side of the welding tip removal componentry, and a welding tip supply spaced apart from the welding gun at a specific distance and configured to supply a welding tip to the welding tip mounting componentry.