Abstract: The base station according to an embodiment communicates with one or more user terminals through one or more reconfigurable intelligent surfaces(RISs). The base station includes a communicator that performs communication with at least one of the one or more user terminals and the one or more reconfigurable intelligent surfaces, and a controller connected to the communicator, and the controller may determine a matching state of the one or more user terminals and the one or more reconfigurable intelligent surfaces that maximizes a sum of data rates for the one or more user terminals connected through the communicator, on/off states of one or more reflective elements included in the one or more reconfigurable intelligent surfaces, total power consumption, and a phase value of the one or more reflective elements included in the one or more reconfigurable intelligent surfaces.

Abstract: Provided are a receptacle connector configured to avoid damage to conductors of the receptacle connector. The receptacle connector includes a plurality of connection terminals, a mold structure which comprises a front part exposing each of the connection terminals and a support part disposed on a rear end of the front part and surrounding each of the connection terminals, and a shield which is disposed on the support part and comprises a conductive material, wherein the support part comprises a flat part which includes a surface along which the shield extends and a protruding part which protrudes from the surface of the flat part and is disposed in front of a front end of the shield. The protruding part is configured to avoid damage to conductors of the receptacle when a plug is mated to the receptacle.

Abstract: A memory device and an electronic device is provided. The memory device may include a memory module including a module board and a memory connector located on one side of the module board, a first enclosure placed above the memory module and a second enclosure placed below the memory module, wherein the first enclosure includes a first main cover which covers upper faces of the module board and the memory connector, at least one clamping hole which penetrates the main cover at a position overlapping the memory connector, an inter-device fastening pillar protruding downward from a lower face of the first main cover, and a coupling hole which is located inside the inter-device fastening pillar on a plane and penetrates the inter-device fastening pillar and the main cover.

Abstract: A memory device and an electronic device is provided. The memory device may include a memory module including a module board and a memory connector located on one side of the module board, a first enclosure placed above the memory module and a second enclosure placed below the memory module, wherein the first enclosure includes a first main cover which covers upper faces of the module board and the memory connector, at least one clamping hole which penetrates the main cover at a position overlapping the memory connector, an inter-device fastening pillar protruding downward from a lower face of the first main cover, and a coupling hole which is located inside the inter-device fastening pillar on a plane and penetrates the inter-device fastening pillar and the main cover.

Abstract: The present invention provides a pharmaceutical composition for prevention or treatment of a stress disease and depression, the pharmaceutical composition be safely useable without toxicity and side effects by using an extract of leaves of Vaccinium bracteatum Thunb., which is natural resource of Korea, so that the reduction of manufacturing and production costs and the import substitution and export effects can be expected through the replacement of a raw material for preparation with a plant inhabiting in nature.

Abstract: The present invention relates to a composition for forming a composite polymer film, a method for preparing the composition for forming a composite polymer film, a composite polymer film and a method for preparing the composite polymer film. The composition for forming a composite polymer film comprises: a fluorine-based polymer solution comprising a fluorine-based polymer; and polyvinylidene fluoride nanoparticles dispersed in the fluorine-based polymer solution. The method for preparing the composition for forming a composite polymer film comprises the steps of: preparing a fluorine-based polymer solution comprising a fluorine-based polymer; and dispersing polyvinylidene fluoride nanoparticles in the fluorine-based polymer solution. The composite polymer film comprises: a polymer matrix formed from a fluorine-based polymer; and polyvinylidene fluoride nanoparticles dispersed in the polymer matrix.

Abstract: Disclosed are a system and method for training and managing a prediction model, and a master apparatus and a slave apparatus for the same. there is provided a system for training and managing a prediction model, the system including a master apparatus configured to generate a prediction model, train the prediction model, and obtain the trained prediction model; and a slave apparatus configured to collect data, transmit the data to the master apparatus, receive the prediction model or the trained prediction model from the master apparatus, and operate based on the prediction model or the trained prediction model. The master apparatus is further configured to generate the prediction model or train the prediction model based on the data transmitted from the slave apparatus.

Abstract: The present invention relates to a method for preparation of a filer containing a DNA fraction and a filler prepared thereby. Despite low contents of the components in the filler, the preparation method of the present invention can secure viscoelasticity in the filler as a physical support and has a high efficiency due to the advantage of preparation processes thereof. The filler prepared through the filler preparation method of the present invention is superb in terms of skin thickness improvement, skin wrinkle reduction effect, and collagen formation ability and causes low pain during injection, giving high satisfaction to patients and operators.

Abstract: A light emitting element may include a first semiconductor layer, a second semiconductor layer including a first area, a second area, and a third area that have different doping concentrations, an active layer disposed between the first semiconductor layer and the second semiconductor layer, and a first intermediate layer and a second intermediate layer that are disposed between at least one of the first area, the second area, and the third area. The first intermediate layer and the second intermediate layer may include different materials.

Abstract: The present invention relates to a 3D printer for construction for printing and forming various structures wherein a roller 50 follows a nozzle 10 which discharges concrete, mortar, or the like, to bring an outer peripheral surface of the roller 50 to be in close contact with a surface of the printed object, and thus the surface of the printed object is flattened. According to the present invention, a high-degree surface flattening work can be performed on the surface of a printed object simultaneously as the printed object is printed by a 3D printer for construction, thus enabling rapid and reliable flattening of the printed object and smooth surface forming.

Abstract: Provided is a glass-glass laminate. The glass-glass laminate includes a lower glass layer, an adhesive layer on the lower glass layer, an upper glass layer on the adhesive layer, and a decoration layer between the lower glass layer and the adhesive layer or between the upper glass layer and the adhesive layer, in which the adhesive layer includes a room-temperature adhesive material.

Abstract: The present invention relates to a 3D printer for construction for printing and forming various structures, in which a spray pipe 60 follows a nozzle 10 for discharging concrete or mortar, and sprays a liquid material onto the surface of a printed object, thereby enabling the liquid material to be applied on the surface of the printed object. Through the present invention, the printing of the printed object and the spraying of the liquid material onto the surface of the printed object may be carried out simultaneously by means of the 3D printer for construction, and thus a rapid and uniform coating treatment of the printed object is possible, and an adequate wet state of the tissue of the printed object may be maintained.

Abstract: Disclosed are glass-glass laminates. A glass-glass laminate includes: a lower glass layer; an adhesive layer on the lower glass layer; an upper glass layer on the adhesive layer; and a decoration layer between the lower glass layer and the adhesive layer or between the upper glass layer and the adhesive layer, wherein the thickness of the upper glass layer is less than the thickness of the lower glass layer, and the thermal expansion coefficient of the upper glass layer is less than the thermal expansion coefficient of the lower glass layer.

Abstract: Provided is a tongue separation device including: a body unit including a contact surface fixing a tongue; a support unit arranged at one end portion of the body unit and supporting the body unit from outside a mouth; a tooth mounting unit arranged at one surface of the support unit adjacent to a first region of the body unit, mounting the teeth in a state where the body unit is inserted into the mouth, and including an upper surface mounting upper teeth among the teeth and a lower surface mounting lower teeth among the teeth; and a tongue position checking unit including an opening formed at the support unit to check a position of the tongue from outside the mouth.

Abstract: In a method according to an example of the present disclosure, an operation method of a service providing device includes a step of processing distributed rendering based on virtual space content data manufactured by one or more user terminals to configure one or more realistic scene image contents; a step of matching the one or more realistic scene image contents to manufacturer information to register them on a database; a step of providing an ordering interface authoring service using the realistic scene image for an interior design business operator terminal; and a step of registering interior design product information based on authoring data inputted from the interior design business operator terminal on an interior design market platform interface.

Abstract: Provided are an energy management method in a self-powered network, and an energy management apparatus and an energy management system to perform the method. The energy management system includes a first energy management unit and at least one second energy management unit configured to be communicable with the first energy management unit. Here, the at least one second energy management unit may acquire observation data using collected data and may transmit the acquired observation data to the first energy management unit, the first energy management unit may acquire a global neural network parameter by performing learning based on the observation data and may transfer the neural network parameter to the second energy management unit, and the at least one second energy management unit may determine an energy dispatch by performing learning using the neural network parameter and the collected data.

Abstract: According to a technical aspect of the invention, there is provided a multiple unmanned aerial vehicles navigation optimization method is performed at a ground base station which operates in conjunction with unmanned aerial vehicles-base stations which are driven by a battery to move and cover a given trajectory point set, the multiple unmanned aerial vehicles navigation optimization method including: calculating an age-of-information metric by receiving an information update from the unmanned aerial vehicles-base stations through communication, when the ground base station is present within a transmission range of the unmanned aerial vehicles-base stations; setting conditions of a trajectory, energy efficiency, and age of information of each of the unmanned aerial vehicles-base stations; and executing Q-learning for finding a trajectory path policy of each of the unmanned aerial vehicles-base stations, so as to maximize total energy efficiency of an unmanned aerial vehicles-base station relay network to whic

Abstract: The present disclosure relates to a maritime communication system based on low earth orbit satellites and an unmanned aerial vehicle. The maritime communication system according to one embodiment may include one or more maritime users, one or more satellites connected to a network operator, and an unmanned aerial vehicle (UAV) for relaying communication between the maritime users and the satellites.

Abstract: An operation method of an interior layout device according to an embodiment of the present invention comprises the steps of: obtaining interior layout information and indoor structure information of a user; obtaining an indoor plan view graph from the indoor structure information and the interior layout information; processing a space usage rate analysis using the indoor plan view graph; generating an analysis interface in which color information is mapped to the indoor plan view graph according to the space usage rate analysis; and outputting the analysis interface.

Abstract: An operation method for an interior layout apparatus, according to an embodiment of the present invention, comprises the steps of: acquiring indoor structure information of a user; generating interior layout automation information including a space layout and interior layout design determined in correspondence to the indoor structure information, according to processing of the analysis of style information corresponding to the user; and outputting the interior layout automation information.