Abstract: Provided is a method for preparing an oligomer including: supplying a monomer stream and a solvent stream to a reactor to perform an oligomerization reaction to prepare a reaction product; supplying a discharge stream from the reactor including the reaction product to a separation device and supplying a lower discharge stream from the separation device to a settling tank; adding an organic flocculant to the settling tank to settle and remove a polymer and supplying the lower discharge stream from the separation device from which the polymer is removed to a high boiling point separation column; and removing a high boiling point material from the lower portion in the high boiling point separation column and supplying an upper discharge stream including an oligomer to a solvent separation column.

Abstract: A method of a first terminal may include: identifying first RB set(s) to be used for SL communication among consecutive RB sets through an LBT procedure; identifying a first subchannel group included in the first RB set(s) and a second subchannel group including a first PRB in the first RB set(s), the first PRB being not included in the first subchannel group; configuring the first PRB within the second subchannel group as an SL communication resource; and transmitting, to a second terminal, control information indicating that the first PRB is configured as the SL communication resource.

Abstract: Provided is a method of producing an oligomer, the method including: supplying a monomer stream and a solvent stream to a reactor to perform an oligomerization reaction to produce a reaction product; supplying a discharge stream of the reactor to a separation device, and supplying an upper discharge stream of the separation device including an unreacted monomer to the reactor and supplying a lower discharge stream of the separation device to a settling tank; settling a polymer in the settling tank and removing the polymer, and supplying the lower discharge stream of the separation device from which the polymer is removed to a high-boiling point separation column; removing a high-boiling point material from a lower discharge stream of the high-boiling point separation column and supplying an upper discharge stream of the high-boiling point separation column including an oligomer to a solvent separation column; and separating a solvent and the oligomer in the solvent separation column.

Abstract: A system and method for laser assisted bonding of semiconductor die. As non-limiting examples, various aspects of this disclosure provide systems and methods that enhance or control laser irradiation of a semiconductor die, for example spatially and/or temporally, to improve bonding of the semiconductor die to a substrate.

Abstract: The present invention provides a device for measuring biological information including a sensor array, wherein the sensor array includes a plurality of sensors that are either sensors for amplifying photoreactivity or sensors forming an island network connected by a plurality of multi-channels and, in the device, the average value of biological information about the skin tissues is measured based on values output from the sensor array, and a method of measuring biological information using the device.

Abstract: Provided is a method for producing alloy steel, the method comprising producing first alloy steel in a temperature holding furnace; maintaining the first alloy steel at a temperature of no lower than a melting point in the temperature holding furnace; and producing second alloy steel having an alloy content lower than the alloy content in the first alloy steel by melt mixing of the first alloy steel and molten steel. In the producing of the alloy steel, melting and storing of the ferroalloy are continuously performed, and thus, the temperature drop of the ferroalloy may be suppressed or prevented.

Abstract: Provided is a dephosphorizing flux configured to adjust a phosphorous component contained in molten steel, the dephosphorizing flux includes a main material including BaCO3 and a supplementary material, wherein the supplementary material includes a first material containing either of NaHCO3 or Na2CO3 and a second material containing CaF2. Thus, in accordance with a dephosphorizing flux and a method for preparing the same of the present disclosure, the plugging of a lower blowing nozzle that blows a carrier gas during dephosphorization may be prevented while improving a dephosphorization ratio. In addition, since environment polluting substances are not used as in conventional arts, environment pollution risk may be reduced, and the cost burden due to the facility for pollution prevention and harmful substance management may be alleviated.

Abstract: Provided is a method for producing steel including: preparing a first molten steel and a manganese-containing melt; supplying a nitrogen gas into a storage to blow nitrogen into the melt received in the storage and thereby adjusting a nitrogen content (wt %) in the melt to a required nitrogen content (wt %); and mixing the melt and the first molten steel to produce a second molten steel containing manganese and nitrogen. Since nitrogen is not blown while melting large amounts of solid materials, the oxidation of manganese due to a high temperature may be minimized or prevented. In addition, a large amount of solid material is not added, and a small amount of manganese-containing nonferrous metal or a FeMn ferroalloy is added, if necessary, into a produced melt in a molten state, and thus, a problem of temperature drop due to the input of the solid material may be minimized or prevented.

Abstract: In a Multi-User Multiple Input Multiple Output (MU-MIMO) radio, networking circuitry transfers MU-MIMO target information to a neighbor radio. The neighbor radio processes the MU-MIMO target information to propose User Equipment (UEs) for handover from the neighbor radio to the MU-MIMO radio. In the MU-MIMO radio, transceiver circuitry determines MU-MIMO channel characteristics for the UEs. Based on their MU-MIMO channel characteristics, the networking circuitry selects some of the UEs from the handover proposals and rejects the other UEs. The transceiver circuitry wirelessly transfers handover acceptance signals to the selected UEs. The transceiver circuitry wirelessly transfers handover rejection signals to the rejected UEs. The transceiver circuitry wirelessly transfers user data to the selected UEs using MU-MIMO.

Abstract: When storing a molten ferroalloy or molten nonferrous metal, the molten ferroalloy or molten nonferrous metal is denitrified or prevented from absorbing nitrogen, and thus post processing such as a denitrification process may not be performed. For this, there is provided a method of producing molten manganese-containing steel, the method including: preparing a molten ferroalloy or a molten nonferrous metal; maintaining the molten ferroalloy or the molten nonferrous metal at a temperature equal to or higher than a melting point thereof; and pouring the molten ferroalloy or the molten nonferrous metal into prepared molten steel, wherein in the maintaining of the molten ferroalloy or the molten nonferrous metal, the molten ferroalloy or the molten nonferrous metal is subjected to a nitrogen-absorption prevention process or a denitrification process.

Abstract: A wireless access point serve wireless User Equipment (UEs) using Multiple User Multiple Input Multiple Output (MU-MIMO). In the wireless access point, radio circuitry wirelessly receives network signaling from the UEs. Control circuitry processes the network signaling and determines initial power allocations to the UEs and initial MU-MIMO groups of the UEs. The control circuitry processes the initial power allocations and the initial MU-MIMO groups and determines new power allocations and new MU-MIMO groups. The radio circuitry wirelessly transmits MU-MIMO signals to the UEs in the new MU-MIMO groups using the new power allocations.

Abstract: Provided is a dephosphorizing flux configured to adjust a phosphorous component contained in molten steel, the dephosphorizing flux includes a main material including BaCO3 and a supplementary material, wherein the supplementary material includes a first material containing either of NaHCO3 or Na2CO3 and a second material containing CaF2. Thus, in accordance with a dephosphorizing flux and a method for preparing the same of the present disclosure, the plugging of a lower blowing nozzle that blows a carrier gas during dephosphorization may be prevented while improving a dephosphorization ratio. In addition, since environment polluting substances are not used as in conventional arts, environment pollution risk may be reduced, and the cost burden due to the facility for pollution prevention and harmful substance management may be alleviated.

Abstract: The present disclosure relates to an apparatus and a method for measuring a moisture content of a compressed recycled paper bale, and the apparatus includes: an impact unit 20 which applies impact to the compressed recycled paper bale 1, and vibrates the compressed recycled paper bale 1; an acceleration sensor unit 30 which is attached to the compressed recycled paper bale 1, and detects acceleration of the compressed recycled paper bale 1 vibrated by the impact unit 20; and a control device 10 which detects a moisture content of the compressed recycled paper bale 1 by receiving a detection result from the acceleration sensor unit 30, and comparing the detection result with a vibration model of the compressed recycled paper bale.

Abstract: Provided is a blocking material and a method for manufacturing alloy steel using the same. In maintaining a molten ferro alloy, used when manufacturing a manganese-containing alloy steel, at a temperature of at least a melting point of the ferro alloy, a blocking material layer is formed on the melt surface of the molten ferro alloy by using a blocking material which includes, with respect to the total of 100 wt %, 37-66 wt % of CaO and SiO2, 8-15 wt % of Al2O3, 6-18 wt % of MgO, and 20-30 wt % of MnO, wherein the ratio of CaO to SiO2 (CaO/SiO2) is in a range of 0.95-1.2. Thus, nitrogen in the air may be prevented from being mixed into the molten ferro alloy.

Abstract: Provided is a method for producing alloy steel, the method comprising producing first alloy steel in a temperature holding furnace; maintaining the first alloy steel at a temperature of no lower than a melting point in the temperature holding furnace; and producing second alloy steel having an alloy content lower than the alloy content in the first alloy steel by melt mixing of the first alloy steel and molten steel. In the producing of the alloy steel, melting and storing of the ferroalloy are continuously performed, and thus, the temperature drop of the ferroalloy may be suppressed or prevented.

Abstract: The present disclosure relates to electronic devices and methods for managing re-enrollment. According to the present disclosure, a method for managing re-enrollment of an electronic device may comprise storing data necessary for re-enrollment to manage the electronic device, reading the stored data corresponding to any one of initialization of the electronic device and deletion of a pre-stored management agent, sending a request for information necessary for authentication using the read data, and receiving at least one of the information necessary for authentication and a management agent installation file received corresponding to the request.

Abstract: Disclosed is an apparatus for conveniently and rapidly removing chips from the interior of a pipe by discharging chips with a portion of fluid out of the pipe using the difference between the pressure in the pipe and atmospheric pressure. The apparatus includes a fitting mounted to a region adjacent to a hole bored in a pipe, a sandwich valve coupled to the fitting, a chip-removing adapter mounted above the sandwich valve, a suction tube extending to an inner surface of the pipe through the chip-removing adapter in order to remove chips from the pipe, a vertical moving unit for vertically moving the suction tube, a delivery tube connected to an upper end of the suction tube and configured to deliver the chips to a predetermined place, and a strainer mounted to a distal end of the delivery tube in order to separate the delivered chips from the fluid.

Abstract: The present disclosure relates to an apparatus and a method for measuring a moisture content of a compressed recycled paper bale, and the apparatus includes: an impact unit 20 which applies impact to the compressed recycled paper bale 1, and vibrates the compressed recycled paper bale 1; an acceleration sensor unit 30 which is attached to the compressed recycled paper bale 1, and detects acceleration of the compressed recycled paper bale 1 vibrated by the impact unit 20; and a control device 10 which detects a moisture content of the compressed recycled paper bale 1 by receiving a detection result from the acceleration sensor unit 30, and comparing the detection result with a vibration model of the compressed recycled paper bale.

Abstract: Disclosed is an apparatus for conveniently and rapidly removing chips from the interior of a pipe by discharging chips with a portion of fluid out of the pipe using the difference between the pressure in the pipe and atmospheric pressure. The apparatus includes a fitting mounted to a region adjacent to a hole bored in a pipe, a sandwich valve coupled to the fitting, a chip-removing adapter mounted above the sandwich valve, a suction tube extending to an inner surface of the pipe through the chip-removing adapter in order to remove chips from the pipe, a vertical moving unit for vertically moving the suction tube, a delivery tube connected to an upper end of the suction tube and configured to deliver the chips to a predetermined place, and a strainer mounted to a distal end of the delivery tube in order to separate the delivered chips from the fluid.

Abstract: An impeller for stirring a melt pool includes: an impeller body extending in the length direction; a blowing nozzle which is provided in such a way as to pass through one part at the bottom end of the impeller body; and a blade provided on the upper part of the impeller body. As a result, when the impeller is used, a stirring flow produced due to the blade and a stirring flow due to substances blown into the melt-pool via the blowing nozzle correspond to each other, and the two flows are combined such that the overall stirring force is improved. Consequently, it is possible to improve the efficiency of stirring by the impeller as compared with hitherto, and, as a result, refining efficiency in the refining step is improved as the rate of reaction between the melt-pool and additives is increased.