Abstract: A method of designing a silencer by using an acoustic metamaterial according to the present disclosure includes distributing design variables through an experimental design method, performing optimal design on initial design proposals, obtaining an insertion loss of an optimal unit cell, and selecting a unit cell to be used first for effective noise reduction.

Abstract: In accordance with an embodiment, a noise reduction device includes a housing; and a slit located inside the housing and having a unit cell located therein, the unit cell comprising a sound absorbing layer configured to absorb noise generated from a sound source inside the housing, and a meta-material panel layer located on one surface of the sound absorbing layer, the meta-material panel layer comprising a sound meta-material.

Abstract: Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.

Abstract: Embodiments relate to a polyamide-imide film that has a clean appearance and transparency and is excellent in antiblocking properties, a process for preparing the same, and a display front panel and a display device comprising the same. The polyamide-imide film comprises a polyamide-imide polymer formed by polymerizing a diamine compound, a dianhydride compound, and a dicarbonyl compound; and a filler, wherein the dicarbonyl compound comprises a first dicarbonyl compound and a second dicarbonyl compound, the first dicarbonyl compound and the second dicarbonyl compound are structural isomers to each other, and the FH value of Equation 1 is 0.5 or less.

Abstract: The embodiments relate to a polyamide-based film that is excellent in optical properties and mechanical properties, to a process for preparing the same, and to a cover window and a display device comprising the same. There are provided a polyamide-based film, which comprises a polyamide-based polymer and has a plasticity characteristic value represented by the following equation of 18.45 to 19.97%, a process for preparing the same, and a cover window and a display device comprising the same: Plasticity characteristic value (%)=(100?nIT)/(HIT/HM). In this equation, nIT, HIT, and HM are measured according to the ISO 14577 standard with a nanoindenter, nIT is the elasticity (%), HIT is the indentation hardness (N/mm2), and HM is the composite hardness (N/mm2).

Abstract: The present disclosure provides a display device including a first subpixel configured to emit light and a second subpixel; a high-potential voltage line connected to the first subpixel and the second subpixel to deliver a high-potential voltage; a low-potential voltage line connected to the first subpixel and the second subpixel configured to deliver a low-potential voltage; and a circuit connected to the low-potential voltage line and configured to sense a value corresponding to the low-potential voltage line during operation of the second subpixel and compensate for a data signal to be supplied to the first subpixel based on the value.

Abstract: Provided are both a superabsorbent polymer capable of continuously and safely exhibiting an improved bacterial growth inhibitory property and a deodorant property without deterioration in the physical properties of the superabsorbent polymer, such as water retention capacity, absorption under pressure, etc., as well as a preparation method for the superabsorbent polymer.

Abstract: A method of fabricating a deposition mask includes forming a wrinkle pattern in a mask rib region and including grooves by partially etching a front surface of a silicon substrate, forming a first photoresist pattern including first openings on a front surface of the silicon substrate in each of cell areas, growing a first plating film covering the grooves of the wrinkle pattern and a second plating film covering first openings of the first photoresist pattern, removing the first photoresist pattern, forming a second photoresist pattern in outer frame areas on a rear surface of the silicon substrate, and exposing a rear surface of metal mask ribs formed with the first plating film and a rear surface of a mask membrane formed with the second plating film by partially etching the rear surface of the silicon substrate using the second photoresist pattern.

Abstract: The present invention relates to a tubular scaffold and a method of manufacturing the same. The tubular scaffold has physical properties matching the characteristics of a tubular organ that bends or rotates when a double layer is formed by electrospinning nanofibers, and not only has excellent cell adhesion ability but may also maintain cell functions. Also, since such effects have been proven in an animal model, the tubular scaffold may be mass-produced and used as a highly functional tubular organ having various sizes and lengths.

Abstract: A computing system according to at least one embodiment disclosed herein includes an autonomous driving controller that controls autonomous driving of a vehicle, and an energy management unit that provides a service related to energy management of the vehicle. The autonomous driving controller may set an output of a driving system included in the vehicle. The energy management unit may determine a change in an internal resistance of a battery based on driving data of the vehicle and battery data of the battery included in the vehicle, and sets an output current of the battery for the set output based of the driving system based on the determined change in the internal resistance.

Abstract: A method for manufacturing a deposition mask includes depositing a seed metal layer on a front surface of a silicon substrate, forming a first photoresist pattern defining first openings on the seed metal layer, growing a plating layer in the first openings of the first photoresist pattern, forming a mask membrane by removing the first photoresist pattern and leaving the plating layer, depositing a protection layer to cover a front surface of the mask membrane, forming a second photoresist pattern defining cell opening corresponding to unit masks, respectively, on a back surface of the silicon substrate, exposing the seed metal layer by etching the back surface of the silicon substrate using the second photoresist pattern as a mask, exposing a back surface of the mask membrane by etching the seed metal layer using the second photoresist pattern as a mask, and removing the protection layer.

Abstract: A deposition mask includes a mask body including a silicon substrate, where a plurality of holes is defined through the mask body, and the mask body further includes mask grids extending to define the holes. A cross section of each mask grid has a reverse tapered shape having a width increasing from a back surface to an upper surface of the deposition mask, and each side surface of each mask grid defining a hole includes a first concave curved surface.

Abstract: A display apparatus in one example includes a display panel having a subpixel configured to emit light with a data voltage applied through a first data line and change an emission condition, based on an additional voltage applied through a first additional line. The display apparatus further includes a driver configured to drive the display panel.

Abstract: Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.

Abstract: A display device includes a display area including multiple pixels and a separator extending around the pixels, and a peripheral area located around the display area and including a scan driver and an electrostatic element part. Each pixel includes a pixel electrode, a light emitting auxiliary layer, and a common electrode. The light-emitting auxiliary layer is disconnected at the separator between neighboring pixels. The electrostatic element unit includes a first voltage line electrically connected to the scan driver, and multiple electrostatic elements electrically connected to the first voltage line. Multiple contact holes overlap the first voltage line located in the electrostatic element unit, and an insulating layer is located in the contact holes.

Abstract: Disclosed herein is a meta-muffler for reducing broadband noise. The meta-muffler includes: a flow pipe through which a fluid flows; an outer barrel disposed outside the flow pipe to be spaced apart from the flow pipe; and multiple metastructures arranged in a flow direction of the fluid and each comprising an opening opened parallel to the flow direction of the fluid, a resonance chamber disposed between the flow pipe and the outer barrel and communicating with the flow pipe through the opening, and a neck adjustment member extending from the outer barrel toward the flow pipe to be spaced apart from the opening in the flow direction of the fluid. The meta-muffler can increase transmission loss of noise flowing through the flow pipe through maximization of energy loss of sound waves entering the resonance chamber of the metastructure and can effectively attenuate noise over a wide band ranging from low frequencies to high frequencies.

Abstract: The embodiments provide a polyamide-based film, which comprises a polyamide-based polymer and has a light resistance index of 0.660 GPa-1 or less as represented by the following Equation 1, whereby it has excellent mechanical properties, optical properties, and light resistance. [Equation 1] Light resistance index=?YI/Y. In Equation 1, Y is the modulus of the film, and ?YI is the rate of change in yellow index (YI) of the film before and after a light resistance test in which UV rays are irradiated to the film at 60° C., the UV irradiation is stopped, and water is sprayed at 50° C.

Abstract: A lens-shaped porous support for fuel cell catalysts may improve electrochemical performance and increase mass transfer capability when the porous support is used as a carrier to support a fuel cell catalyst.

Abstract: A service providing system associated with an autonomous driving platform is provided. A service providing system associated with a simulation platform is provided. The service providing system includes a platform managing server configured to manage the simulation platform that provides simulation related to a driving environment of a vehicle, a vehicle data managing server configured to acquire vehicle data including driving data related to driving of the vehicle and battery data related to a state of a battery of the vehicle and provide a simulation request based on the vehicle data and the vehicle data to the simulation platform, and a service server configured to manage energy management software that provides energy management data to the simulation platform in association with the simulation platform.

Abstract: The present invention relates to a novel compound that is effective in inhibiting fibrosis. The inventors confirmed that the compound has an effect of inhibiting actin polymerization and not only reduces the levels of all types of fibrosis biomarkers but also effectively inhibits the expression of ?-SMA, which is a major causative factor of fibrosis. Therefore, the novel compound according to the present invention is expected to be effectively used as a preparation having an excellent effect of alleviating and inhibiting fibrosis to prevent and treat a fibrosis disease.