Abstract: A martensitic stainless steel for use in tableware, knives, scissors and the like, containing in % by weight, 0.10 to 0.50% carbon and 11 to 16% chromium, and a production method therefore.

Abstract: A method for manufacturing a fine spheroidized steel sheet having an excellent heat treatment characteristic, the method including: i) manufacturing a high carbon slab that is formed of 0.3 to 1.0 wt % C, 0.1 to 1.2 wt % Mn, 0 to 0.4 wt % Si, 0.01 to 0.1 wt % Al, 0 to 0.01 wt % S, and balance Fe and an inevitably added impurity as residuals; ii) reheating the slab to a temperature of Ar3 transformation point or more; iii) roughing rolling the slab, and manufacturing a thin plate by performing finish rolling in an austenite region; iv) cooling the thin plate at a cooling speed of 50 to 300° C./sec; v) finishing the cooling of the thin plate at a temperature region of 400 to 650° C. and maintaining the temperature; vi) winding the thin plate at a temperature region of 450 to 700° C.; vii) performing cold rolling at a reduction ratio of 30% or more; and viii) spheroidizing annealing the cold rolled thin plate.

Abstract: A method and apparatus for managing connection is disclosed, which is capable of realizing an efficient management through a bi-directional connection, the method comprising pairing two uni-directional connections between a receiver and a transmitter, if Internet service to be provided requires bi-directional data delivery capability; and creating a second uni-directional connection by assigning the second uni-directional connection at the time of creating a first uni-directional connection for the Internet service, wherein the first uni-directional connection is opposite to the second uni-directional connection.

Abstract: The present invention relates to resolving issues concerning deterioration in the performance and yield of a flexible electronic device, caused by low manufacturing temperatures, high degrees of surface roughness, a high thermal expansion coefficients, and bad handling characteristics of typical flexible substrates. The method for manufacturing a flexible electronic device according to the present invention includes: forming a flexible substrate on a motherboard while physically separating the interface therebetween so that the interfacial bonding therebetween has a yield strength less than that of the flexible substrate; and forming an electronic device on the separated surface of the flexible substrate which had previously been in contact with the motherboard.

Abstract: A method and an apparatus for treating return ores using plasma, capable of treating sintered return ores generated in a sintering process in a steel maker or return ores (iron ores) employed in other ironmaking process such as FINEX. The method of treating return ores using plasma includes: providing return ores sorted out by a sorting process; and bonding the return ores by fusing and agglomerating the return ores using plasma. Also, an apparatus for treating return ores using plasma includes a plasma heating device used to fuse and agglomerate sorted return ores. The return ores of a predetermined grain size are fusion-bonded and agglomerated using a flame of a plasma heating device. Particularly, the return ores can be treated in a massive amount to enhance productivity of a fusion-bonding process of the return ores. Furthermore, a great amount of sintered return ores generated in the sintering process can be subjected to a fewer number of re-treatment processes.

Abstract: A device for supporting a molten metal container is provided, wherein the device has first and second support units for supporting the weight of the molten metal container in connection with a ring member, taken alone or in combination according to a rotary position. According to one embodiment of the present invention, the device for supporting the molten metal container comprises: a ring member which encloses the outside of a rotatable molten metal container; and first and second support units which are configured to support the weight of said molten metal container in connection with said ring member, taken alone or in combination according to a rotary position of said molten metal container.

Abstract: Disclosed herein is an optical semiconductor based illuminating apparatus including light emitting modules including at least one semiconductor optical device; and a housing enclosing one side surface of at least one of the light emitting modules. This optical semiconductor based illuminating apparatus may promote convenience for checking and repairing, simply perform separation and fastening, have excellent waterproofing characteristics and durability, prevent accidents such as short circuit and electric shock improve heat radiation performance, prevent introduction of foreign materials, be easily cleaned and maintained, reliably provide power of a main power line to a plurality of light emitting modules, and utilize a space and secure reliability of a product regardless of a size and a shape of a power supply embedded therein.

Abstract: An optical semiconductor lighting apparatus includes a heat sink including a heat dissipation base and a plurality of heat dissipation fins formed on a lower surface of the heat dissipation base; an optical semiconductor device placed on the heat dissipation base; and an optical cover coupled to an upper side of the heat sink to cover the optical semiconductor device. The heat dissipation base is formed with an air flow hole through which upper ends of the heat dissipation fins are exposed.

Abstract: Disclosed herein is an apparatus and method for measuring the center of gravity of slabs. The apparatus for measuring the center of gravity of slabs includes a main system, a gravity center measurement system, and an unmanned crane. The main system provides information about the dimensions and/or weight of each of a plurality of slabs loaded in a vehicle. The gravity center measurement system includes a photographing unit for photographing the loaded slabs to be moved, a driving unit for moving the photographing unit up and down, and a control unit for calculating the center of gravity and grip position of all of the slabs, to be moved each time, based on information about a position and configuration of each of the slabs from the photographing unit and the information about the dimensions and/or weight of each of the slabs from the main system. The unmanned crane grips and moves the slabs according to the grip position information calculated by the gravity center measurement system.

Abstract: Provided is a descaling device for effectively removing scale formed on a surface of a hot-rolled steel strip (steel sheet). The descaling device, for example, may be configured to include: a device housing disposed in a feed path of a hot-rolled steel strip, a high-pressure fluid supply unit provided to supply a high-pressure fluid to the device housing, an abrasive input unit provided to introduce an abrasive to the device housing, and an abrasive slurry spraying unit provided in the device housing to spray an abrasive slurry of the high-pressure fluid and the abrasive mixed inside the device housing on the steel strip.

Abstract: The present invention provides an optical semiconductor-based lighting apparatus. The lighting apparatus includes a housing, a light emitting module disposed on an open region at one side of the housing, and a heat sink unit placed within the housing to absorb and discharge heat from the light emitting module. The light emitting module includes a heat sink base on which a semiconductor optical device is mounted. The heat sink unit includes at least one main heat pipe having one side adjoining the heat sink base and a heat sink block adjoining the other side of the main heat pipe to cooperate with the main heat pipe.

Abstract: Disclosed herein is a precipitation hardening cold-rolled steel sheet and method for manufacturing the same, which can be used for structural components such as seat rails and the like of a vehicle body. The steel sheet comprises, by weight %, C: 0.07˜0.1%, Mn: 1.4˜1.7%, P: 0.05˜0.07%, S: 0.005% or less, acid-soluble Al: 0.1˜0.15%, Nb: 0.06˜0.09%, B: 0.0008˜0.0012%, Sb: 0.02˜0.06%, and the balance of Fe and other unavoidable impurities. The steel sheet has a yield strength of 750 MPa or more and a yield ratio of 85% or more, and is free from surface defects due to a very low degree of oxide enrichment on the surface thereof.

Abstract: Provided is an ultra-fine grained, high-strength, high-toughness carbon steel wire rod manufactured through control of a microstructure by process control without addition of relatively expensive alloying elements. More particularly, the material provided is an ultra-fine grained, high-strength, high-toughness carbon steel wire rod having a microstructure including a ferrite structure having an area fraction of 60% or more and a cementite structure as a remainder, wherein an average grain diameter of ferrite grains is 15 ?m or less. Also provided is a method of manufacturing the wire rod.

Abstract: The present invention relates to a novel thermostable gluconate dehydratase from the thermoacidophilic archaeon Sulfolobus solfataricus, a coding sequence, and an expression system. The gluconate dehydratase has a molecular weight of about 320,000 to 380,000 daltons as the native protein, and about 40,000 to 50,000 daltons as the monomer protein, and catalyzes the dehydration reaction of aldonic acids to 2-keto-3-deoxy derivatives at temperatures of less than 120° C. The gluconate dehydratase can be produced from native or recombinant host cells and thereby used in the pharmaceutical, agricultural, and other industries.

Abstract: The present invention relates to a system and method for providing Multicast and Broadcast Service (MCBCS). According to the present invention, the MCBCS system and method supports session start and data path registration procedures, join and leave procedure for providing the MCBCS with static or dynamic multicast service schemes, and supports procedures for providing to mobile stations operating in idle mode. Accordingly, the present invention enables effectively implementing the MCBCS in a wireless communication system, particularly in WiMAX system, and provides the MCBCS according to the mobile stations operating in idle mode.

Abstract: An apparatus for generating energy using sensible heat of an offgas during manufacture of molten iron and a method for generating energy using the same are provided. The method for generating energy includes i) providing an offgas discharged from an apparatus for manufacturing molten iron including a reduction reactor that provides reduced iron that is reduced from iron ore and a melter-gasifier that melts the reduced iron to manufacture molten iron; ii) converting cooling water into high pressure steam by contacting the cooling water with the offgas; and iii) generating energy from at least one steam turbine by supplying the high pressure steam to the steam turbine and rotating the steam turbine.

Abstract: An optical semiconductor based illuminating apparatus including a housing having an opening portion, a lighting unit disposed adjacent to the housing that includes at least one optical semiconductor, a power supply mounted within the housing that supplies power to the lighting unit, and a gate unit connected to the opening part that opens and shuts the inner housing.

Abstract: Disclosed is a method of forming a continuous channel for gas discharge in the surface of a casting roll for twin roll strip casting, and particularly, a method of forming a continuous channel for gas discharge on the surface of a casting roll for twin roll strip casting, suitable for the formation of dimples on the surface of a casting roll for a twin roll strip caster, which includes applying a photoresist on the entire surface of a casting roll, conducting patterning on the applied photoresist, developing the surface of the casting roll, subjected to the patterning, and etching the metal surface of the casting roll, exposed in the developing, and which prevents the generation of dents, enables the manufacture of a cast product having no defects, and realizes wide applicability not only to high Mn steel but also to types of casting steel capable of generating dents or similar defects due to a large amount of volatile gas.

Abstract: The present invention relates to a production method for high-carbon martensitic stainless steel as used in razorblades, knives and the like, which contains, as percentages by weight, 0.40 to 0.80% carbon and 11 to 16% chromium as main components. Provided is a production method for high-carbon martensitic stainless steel in a strip-casting device, wherein a stainless-steel thin sheet is cast by supplying a stainless molten steel containing, as percentages by weight, 0.40 to 0.80% carbon and from 11 to 16% chromium to a molten steel pool from a tundish via a nozzle, and the cast stainless-steel thin sheet is made into a hot-rolled annealed strip using in-line rollers to a rolling reduction of 5 to 40% immediately just after the casting so that the size of primary carbides within the microstructure of the hot-rolled annealed strip is 10 ?m or less, and also provided is martensitic stainless steel produced by means of the production method.

Abstract: An optical semiconductor-based tube type lighting apparatus capable of enlarging light distribution to have improved assembly characteristics. The lighting apparatus includes an elongated light-transmitting tube, and a plurality of optical semiconductor modules arranged along a circumference of the light-transmitting tube and separated from each other in a cross-sectional view of the light-transmitting tube. Each of the optical semiconductor modules is placed on a point, which is not on a central axis line of light emitted from other optical semiconductor modules, so as not to face another optical semiconductor module at an opposite side thereof.