Abstract: A massive multiple-input multiple-output (MIMO) antenna apparatus and a heat dissipation device therefor are disclosed. The present disclosure according to at least one embodiment provides a massive MIMO antenna apparatus including a board, a first blowing unit, and a second blowing unit. The board has at least one board surface that holds a distributed arrangement of a plurality of heat-generating components, has a width and a length longer than the width, and includes a first section having a first amount of heat generation and a second section having a second amount of heat generation greater than the first amount of heat generation, the first section and the second section being partitioned along a length direction of the board.

Abstract: A method for separating polybutene, the method including: (1) introducing a polybutene solution into a distillation column, the solution including polybutene, a halogenated hydrocarbon solvent, and a non-polar hydrocarbon solvent and having a viscosity of 1 cp to 50 cp measured at 25° C. using a rotational viscometer; (2) collecting an upper stream including the halogenated hydrocarbon solvent and a portion of the non-polar hydrocarbon solvent from an upper portion of the distillation column, and collecting a lower stream including the polybutene and a remaining portion of the non-polar hydrocarbon solvent from a lower portion of the distillation column, where the lower stream has a viscosity of 10 cp to 150 cp; and (3) separating the remaining portion of the non-polar hydrocarbon solvent and the polybutene from the lower stream.

Abstract: A stage circuit includes an input unit connected to a first input terminal receiving a gate start pulse or a previous stage carry signal to control a voltage of a first node, a first output unit connected to a fourth input terminal to which a clock signal is input and supplying a scan signal to a first output terminal corresponding to a voltage of the first node and a second node, a second output unit connected to a third input terminal to which a second carry clock signal is input and supplying a carry signal to a second output terminal corresponding to the voltage of the first node and the second node, a first control unit connected to a first power input terminal to which first power is input and controlling a voltage of a third node, and a second control unit connected to a second power input terminal.

Abstract: A display device includes a display panel that has a display region in which an image is displayed, a first adhesive layer disposed below the display panel, a translucent protective film disposed below the first adhesive layer, a fingerprint sensor disposed below the protective film and that overlaps the display region, the first adhesive layer, and the protective film when viewed in a plane, and a cover layer disposed below the protective film and in which an opening for accommodating the fingerprint sensor is formed.

Abstract: A stage circuit includes an input unit connected to a first input terminal receiving a gate start pulse or a previous stage carry signal to control a voltage of a first node, a first output unit connected to a fourth input terminal to which a clock signal is input and supplying a scan signal to a first output terminal corresponding to a voltage of the first node and a second node, a second output unit connected to a third input terminal to which a second carry clock signal is input and supplying a carry signal to a second output terminal corresponding to the voltage of the first node and the second node, a first control unit connected to a first power input terminal to which first power is input and controlling a voltage of a third node, and a second control unit connected to a second power input terminal.

Abstract: A display device includes a display panel that has a display region in which an image is displayed, a first adhesive layer disposed below the display panel, a translucent protective film disposed below the first adhesive layer, a fingerprint sensor disposed below the protective film and that overlaps the display region, the first adhesive layer, and the protective film when viewed in a plane, and a cover layer disposed below the protective film and in which an opening for accommodating the fingerprint sensor is formed.

Abstract: A display panel includes a first pixel circuit including a first pixel light emitting element, a first pixel driving transistor which applies a driving current to the first pixel light emitting element and a first pixel writing transistor which applies a data voltage to the first pixel driving transistor, a second pixel circuit disposed adjacent to the first pixel circuit and including a second pixel light emitting element, a second pixel driving transistor which applies a driving current to the second pixel light emitting element and a second pixel writing transistor which applies a data voltage to the second pixel driving transistor, a first initialization transistor including a gate electrode which receives an initialization gate signal, a first electrode connected to an anode electrode of the first pixel light emitting element and a second electrode connected to a gate electrode of the second pixel driving transistor.

Abstract: A display device includes a protective layer. A display panel is disposed on an upper surface of the protective layer. The display panel includes a display area configured to display an image and a non-display area at least partially surrounding the display area. A cover panel is disposed on a back surface of the protective layer. The cover panel includes an opening that exposes the protective layer. A fingerprint sensor is disposed within the opening of the cover panel. The fingerprint sensor is configured to sense a fingerprint. A first fixing member is disposed on one surface of the fingerprint sensor. A second fixing member at least partially overlaps at least one side of the first fixing member, the second fixing member fixing the fingerprint sensor. The first fixing member and the second fixing member each include at least one different material from each other.

Abstract: Disclosed is a method of manufacturing a cathode for a solid oxide fuel cell (SOFC) including preparing an electrode composition containing urea, ultrasonically spraying the electrode composition onto a GDC scaffold, and drying the scaffold. By using urea, calcination (?700° C.) after each infiltration cycle can be omitted, the next infiltration cycle is performed immediately after the drying (?100° C.), and thus the cathode manufacturing process time can be greatly reduced. Disclosed is also a solid oxide fuel cell including an anode support, an anode functional layer disposed on the anode support, an electrolyte disposed on the anode functional layer, and a cathode disposed on the electrolyte, wherein the cathode is formed by ultrasonic spraying using an electrode composition containing urea.

Abstract: A display device includes a protective layer. A display panel is disposed on an upper surface of the protective layer. The display panel includes a display area configured to display an image and a non-display area at least partially surrounding the display area. A cover panel is disposed on a back surface of the protective layer. The cover panel includes an opening that exposes the protective layer. A fingerprint sensor is disposed within the opening of the cover panel. The fingerprint sensor is configured to sense a fingerprint. A first fixing member is disposed on one surface of the fingerprint sensor. A second fixing member at least partially overlaps at least one side of the first fixing member, the second fixing member fixing the fingerprint sensor. The first fixing member and the second fixing member each include at least one different material from each other.

Abstract: Proposed are a shell launcher for a drone and a method of launching shells for a drone. According to the shell launcher for a drone and the method of launching shells for a drone, by launching shells such as EFPs using a drone, it is possible to use a drone as various weapon systems.

Abstract: According to the present disclosure, disclosed are a learning operating method based on a federated distillation, a learning operating server, and a learning operating terminal which calculate a local average logit by collecting data samples by the terminal, transmit the local average logit and seed samples to an uplink of a server, perform distillation of a global model based on the seed sample and the local average logit by the server to solve the problems of the privacy and communication overhead generated in the distributed network.

Abstract: A display device includes a display panel that has a display region in which an image is displayed, a first adhesive layer disposed below the display panel, a translucent protective film disposed below the first adhesive layer, a fingerprint sensor disposed below the protective film and that overlaps the display region, the first adhesive layer, and the protective film when viewed in a plane, and a cover layer disposed below the protective film and in which an opening for accommodating the fingerprint sensor is formed.

Abstract: A display device includes a display panel that has a display region in which an image is displayed, a first adhesive layer disposed below the display panel, a translucent protective film disposed below the first adhesive layer, a fingerprint sensor disposed below the protective film and that overlaps the display region, the first adhesive layer, and the protective film when viewed in a plane, and a cover layer disposed below the protective film and in which an opening for accommodating the fingerprint sensor is formed.

Abstract: Proposed are a shell launcher for a drone and a method of launching shells for a drone. According to the shell launcher for a drone and the method of launching shells for a drone, by launching shells such as EFPs using a drone, it is possible to use a drone as various weapon systems.

Abstract: Provided is a device for allocating a dynamic frequency for a secondary user in a cognitive radio network. The device includes: an OP map generation unit for generating an opportunity map, which represents a probability of successful communication of the secondary transmitter in each region of the cognitive radio network, by using one or more of spectrum sensing information, which is received from a spectrum sensor that has completed sensing and includes identifier information, location information, and a sensing measurement matrix, an access request message, which is received from the secondary transmitter and includes identifier information, location information, and operable band information, and the density and transmission powers of primary transmitters; and a response message generation unit for generating a response message, which includes the channel having the highest probability of successful communication and the probability of successful communication, based on the generated map.

Abstract: A redundant array of independent disks (RAID) storage system includes a plurality of storage devices that perform an erase operation according to a plurality of erase unit sizes. A RAID controller controls the plurality of storage devices based on a RAID environment. The RAID controller adjusts the erase unit sizes with respect to at least some of the plurality of storage devices, respectively.

Abstract: A display device includes a display panel that has a display region in which an image is displayed, a first adhesive layer disposed below the display panel, a translucent protective film disposed below the first adhesive layer, a fingerprint sensor disposed below the protective film and that overlaps the display region, the first adhesive layer, and the protective film when viewed in a plane, and a cover layer disposed below the protective film and in which an opening for accommodating the fingerprint sensor is formed.

Abstract: Provided is a device for allocating a dynamic frequency for a secondary user in a cognitive radio network. The device includes: an OP map generation unit for generating an opportunity map, which represents a probability of successful communication of the secondary transmitter in each region of the cognitive radio network, by using one or more of spectrum sensing information, which is received from a spectrum sensor that has completed sensing and includes identifier information, location information, and a sensing measurement matrix, an access request message, which is received from the secondary transmitter and includes identifier information, location information, and operable band information, and the density and transmission powers of primary transmitters; and a response message generation unit for generating a response message, which includes the channel having the highest probability of successful communication and the probability of successful communication, based on the generated map.

Abstract: A display device includes a protective layer. A display panel is disposed on an upper surface of the protective layer. The display panel includes a display area configured to display an image and a non-display area at least partially surrounding the display area. A cover panel is disposed on a back surface of the protective layer. The cover panel includes an opening, that exposes the protective layer. A fingerprint sensor is disposed within the opening of the cover panel. The fingerprint sensor is configured to sense a fingerprint. A first fixing member is disposed on one surface of the fingerprint sensor. A second fixing member at least partially overlaps at least one side of the first fixing member, the second fixing member fixing the fingerprint sensor. The first fixing member and the second fixing member each include at least one different material from each other.