Abstract: Disclosed is a high-strength hollow steel pipe material. The high-strength hollow steel pipe material includes Fe as a main ingredient, 0.30 to 0.40% by weight of C, 0.10 to 0.40% by weight of Si, 1.10 to 1.60% by weight of Mn, 0.20 to 0.40% by weight of Cr, 0.50 to 1.00% by weight of Ni and 0.001 to 0.005% by weight of B, the high-strength hollow steel pipe material having increased material corrosion fatigue life, compared to conventional steel pipe materials, by enhancing elongation and corrosion resistance while reinforcing strength through increase of the amounts of C and Ni conventionally added and addition of Nb and Mo as new materials.

Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.

Abstract: According to a method of manufacturing a thin film transistor substrate, a composition including a metal oxalate and a solvent for manufacturing an oxide semiconductor is coated to form a thin film, the thin film is annealed, and the thin film is patterned to form a semiconductor pattern.

Abstract: A slide-type core retainer for a sample collector including a sampler tube driven into a sea floor. The slide-type core retainer includes a catcher holder detachably coupled to a tip end of the sampler tube; a catcher installed on an inner peripheral surface of a tip end of the catcher holder and configured to allow sediment introduction into the sampler tube and preventing sediment from being lost using resiliency. A control member slidably installed inside the catcher holder controls opening and closing of the catcher. The control member is coupled to the catcher before sample collection so that the catcher remains opened. The control member slides into an inner side of the catcher holder while being separated from the catcher by the resistance of the solid sediment such that the catcher is closed, when resistance is generated by solid sediment after the sampler tube is driven into the sediment.

Abstract: Methods of forming an oxide material layer are provided. The method includes mixing a precursor material with a peroxide material to form a precursor solution, coating the precursor solution on a substrate, and baking the coated precursor solution.

Abstract: Provided are a composition for an oxide semiconductor, a method of preparing the composition, methods of forming an oxide semiconductor thin film and an electronic device using the composition. The composition for an oxide semiconductor includes a tin compound, a zinc compound, and a low electronegativity metal compound containing a metal with an electronegativity lower than zinc.

Abstract: According to a method of manufacturing a thin film transistor substrate, a composition including a metal oxalate and a solvent for manufacturing an oxide semiconductor is coated to form a thin film, the thin film is annealed, and the thin film is patterned to form a semiconductor pattern.

Abstract: Methods of forming an oxide material layer are provided. The method includes mixing a precursor material with a peroxide material to form a precursor solution, coating the precursor solution on a substrate, and baking the coated precursor solution.

Abstract: Provided are an oxide semiconductor composition, a preparation method thereof, an oxide semiconductor thin film using the composition, and a method of forming an electronic device. The oxide semiconductor composition includes a photosensitive material and an oxide semiconductor precursor.

Abstract: A slide-type core retainer for a sample collector including a sampler tube driven into a sea floor. The slide-type core retainer includes a catcher holder detachably coupled to a tip end of the sampler tube; a catcher installed on an inner peripheral surface of a tip end of the catcher holder and configured to allow sediment introduction into the sampler tube and preventing sediment from being lost using resiliency. A control member slidably installed inside the catcher holder controls opening and closing of the catcher. The control member is coupled to the catcher before sample collection so that the catcher remains opened. The control member slides into an inner side of the catcher holder while being separated from the catcher by the resistance of the solid sediment such that the catcher is closed, when resistance is generated by solid sediment after the sampler tube is driven into the sediment.

Abstract: Provided are a composition for an oxide semiconductor, a method of preparing the composition, methods of forming an oxide semiconductor thin film and an electronic device using the composition. The composition for an oxide semiconductor includes a tin compound, a zinc compound, and a low electronegativity metal compound containing a metal with an electronegativity lower than zinc.

Abstract: Provided is a scroll compressor having an improved function of oil circulation and back pressure control. The scroll compressor includes: a housing; a drive part for generating a rotational force; a drive shaft driven by the drive part; and a scroll compression part including a stationary scroll fixed regardless of rotation of the drive shaft and having a scroll wrap for compressing sucked fluid and a discharge port for supplying coolant into a discharge chamber, and an orbiting scroll orbited depending on rotation of the drive shaft and having a scroll wrap, characterized in that the coolant compressed by the scroll compression part is conveyed to the discharge chamber, the coolant of the discharge chamber is separated into oil and gas in an oil separator, the gas being discharged through a discharge hole and the oil being supplied into a back pressure chamber through a return path formed in the stationary scroll, and the oil is returned into a suction chamber through a back pressure adjustment valve.

Abstract: The present invention relates to a semiconductor manufacturing device that a maintenance or a repairing is easy so that an efficiency of manufacturing can be enhanced because a high temperature of a susceptor can be rapidly down. The present invention relates to a semiconductor manufacturing device that an efficiency of manufacturing can be enhanced because a heater for heating the semiconductor is heated by an external heating device.

Abstract: Provided is a scroll compressor having a rotation prevention mechanism including: a housing for accommodating components; a drive unit for generating a rotational force; a suction part for sucking fluid from the exterior; a scroll compression part including a stationary scroll constituted of a spiral scroll wrap for compressing the fluid sucked from the suction part and fixed regardless of rotation of a drive shaft of the drive unit, and an orbiting scroll orbited depending on rotation of the drive shaft and having a spiral scroll wrap; and a discharge part for discharging the high pressure fluid compressed by the scroll compression part, characterized in that a guide ring is installed between the stationary scroll and the suction-side housing, a plurality of fitting pins are installed to project forward from an outer periphery of the orbiting scroll, and a plurality of fitting grooves, in which the fitting pins are accommodated, are formed at an inner periphery of the guide ring.

Abstract: Provided is a scroll compressor having an improved function of oil circulation and back pressure control. The scroll compressor includes: a housing; a drive part for generating a rotational force; a drive shaft driven by the drive part; and a scroll compression part including a stationary scroll fixed regardless of rotation of the drive shaft and having a scroll wrap for compressing sucked fluid and a discharge port for supplying coolant into a discharge chamber, and an orbiting scroll orbited depending on rotation of the drive shaft and having a scroll wrap, characterized in that the coolant compressed by the scroll compression part is conveyed to the discharge chamber, the coolant of the discharge chamber is separated into oil and gas in an oil separator, the gas being discharged through a discharge hole and the oil being supplied into a back pressure chamber through a return path formed in the stationary scroll, and the oil is returned into a suction chamber through a back pressure adjustment valve.

Abstract: The present invention relates to a semiconductor manufacturing device that a maintenance or a repairing is easy so that an efficiency of manufacturing can be enhanced because a high temperature of a susceptor can be rapidly down. The present invention relates to a semiconductor manufacturing device that an efficiency of manufacturing can be enhanced because a heater for heating the semiconductor is heated by an external heating device.

Abstract: Provided is a method of determining a mode in a multi-mode terminal. The method includes the steps of: receiving key input of a telephone number; displaying a connectable service mode corresponding to the key input of the telephone number; receiving key input corresponding to the service mode; determining a prefix corresponding to the key input of the service mode; and adding the determined prefix in front of the telephone number to be transmitted, wherein the connectable service mode is automatically renewed in the region where the service is provided. Also, a multi-mode terminal is provided.

Abstract: Provided is a method of preparing an optically pure compound having formula 1 or its salts. The method includes: reacting (R)-2-(4-methoxy-3-aminosulfonyl-phenyl)-1-methylethylamine or its salts with a compound selected from the group consisting of chloroacetic acid, bromoacetic acid, fluoroacetic acid, iodoacetic acid, ?-halogenoacetic acid anhydride, and ?-halogenoacetyl halide in the presence of a base or an acylating agent.

Abstract: Disclosed is a novel dicarboxylic acid salt of sibutramine, which has good physicochemical properties. Also disclosed are a method of preparing the compound and a pharmaceutical composition comprising the compound.

Abstract: Disclosed is a novel sulphonic acid salt of sibutramine, which has good physicochemical properties. Also disclosed are a method of preparing the compound and a pharmaceutical composition comprising the compound.