Abstract: Disclosed is a paint protection film having a storage modulus measured at a temperature of n ° C. according to ASTM D4065 of En, where n is a number representing a temperature in degrees Celsius, wherein E40/E20 is 0.75 or more and 1.1 or less, wherein the paint protection film has a change index dYI of yellowness according to ASTM E313 before and after a UV irradiation, represented by Equation 1 below, of 0.8 or less, where the UV irradiation is performed for 72 hours at an output of 3 W with a light having wavelength from 280 nm to 360 nm: dYI=|YI?UV_YI|??[Equation 1] in Equation 1, YI is the yellowness of the paint protection film before the UV irradiation, and UV_YI is the yellowness of the paint protection film after the UV irradiation.

Abstract: Proposed is a federated learning system. The federated learning system may comprise: a central server configured to transmit a first parameter of an extractor in a federated learning model including the extractor and a classifier to each of a plurality of client devices, and receive a plurality of first parameters learned from the plurality of client devices to update the federated learning model; and the plurality of client devices configured to train each of the plurality of the first parameters of the federated learning model using a training data set stored in each of the plurality of client devices while maintaining a value of a second parameter value of the classifier in the federated learning model, and to transmit each of the plurality of the trained first parameters to the central server.

Abstract: A film for an electronic board, according to one embodiment, has a low dielectric constant of 2.9 or lower at a frequency of 10-40 GHz, and thus can cause the signal transmission rate for a high frequency use, such as fifth generation (5G) mobile communication, to be superior to that of a conventional film for an electronic board. In addition, the film for an electronic board has flexibility and physicochemical characteristics that are greater than or equal to those of a conventional film, so as to be applicable to the manufacture of a laminate of a conductive film such as FCCL and an electronic board such as a FPCB, thereby enabling processability, durability, transmission capacity and the like to be improved.

Abstract: A film for an electronic substrate according to an embodiment has a moisture-absorption rate of less than 0.3% of the initial weight when immersed in water for 24 hours, and thus is less susceptible than existing films for electronic substrates are to changes in dimension or degradation in electrical characteristics caused by containing moisture according to changes in temperature and humidity. Also, the film for an electronic substrate is equal or superior to existing films in terms of flexibility and physicochemical characteristics, and thus may be applied to the manufacture of laminates with a conductive film such as FCCL and electronic substrates such as FPCB to improve processability, durability, transmission capacity, etc.

Abstract: A film for glass bonding includes a thiourethane layer comprising a heterocyclo-alkanediyl-based repeat unit indicated by Formula 1, and a linear alkanediyl-based repeat unit indicated by Formula 2, and a base layer, disposed on a surface of the thiourethane layer, comprising a polyvinyl acetal resin and a plasticizer. In the Formula 1, R1 is —O— or —S—, and X is a heterocyclo-alkanediyl group having carbon atoms of 3 to 10 and sulfur atoms of 1 to 5, and in the Formula 2, R2 is —O— or —S—, and n2 is an integer of 4 to 10.

Abstract: A film for glass bonding includes a thiourethane layer comprising a heterocyclo-alkanediyl-based repeat unit indicated by Formula 1, and a linear alkanediyl-based repeat unit indicated by Formula 2, and a base layer, disposed on a surface of the thiourethane layer, comprising a polyvinyl acetal resin and a plasticizer. In the Formula 1, R1 is —O— or —S—, and X is a heterocyclo-alkanediyl group having carbon atoms of 3 to 10 and sulfur atoms of 1 to 5, and in the Formula 2, R2 is —O— or —S—, and n2 is an integer of 4 to 10.

Abstract: An embodiment relates to an aromatic polythiol compound for optical materials, and the aromatic polythiol compound according to the embodiment contains a phenyl group and a large number of sulfur atoms in its polythiol structure so that a polymerizable composition and an optical material obtained therefrom have excellent optical properties such as high refractive index and low specific gravity, as well as excellent mechanical properties such as low cure shrinkage; thus, they can be advantageously used for producing various plastic optical lenses such as eyeglass lenses and camera lenses.

Abstract: A control apparatus for a rear wheel steering system is provided to control the rear wheel steering system by calculating a target rear wheel steering angle using sensors included in a parking assist system. The control apparatus includes a first sensor and a second sensor spaced apart from each other and mounted on a rear portion of a vehicle, a determiner configured to determine whether a trailer is mounted at a rear side of the vehicle using the first sensor or the second sensor, and a controller configured to control the rear wheel steering system according to a target rear wheel steering angle calculated using the first and second sensors when it is determined that the trailer is mounted at the rear side of the vehicle.

Abstract: The xylylene diisocyanate composition according to the embodiments has a chlorine content of 100 to 1,000 ppm to improve the stability, so that the degradation of the reactivity can be prevented even when it is stored for a long period of time. Therefore, even if the xylylene diisocyanate composition according to the embodiments is used after it has been stored for a long period of time for sale or the like, the xylylene diisocyanate composition can be polymerized with a thiol to produce a polythiourethane-based optical material having excellent properties such as refractive index, Abbe number, transparency, glass transition temperature, yellowness index, and the like. Therefore, it can be advantageously used in the field of eyeglass lenses, camera lenses, and the like.

Abstract: A nitride semiconductor light-emitting device comprises a substrate; a first conductivity type semiconductor layer formed on the substrate; a high-resistance semiconductor layer formed on the first conductivity type semiconductor layer; an active layer formed on the high-resistance semiconductor layer and having multiple quantum wells; and a second conductivity type semiconductor layer formed on the active layer. A first v-pit structure is formed between the high-resistance semiconductor layer and the first conductivity type semiconductor layer, and a second v-pit structure is formed between the active layer and the second conductivity type semiconductor layer. The second v-pit structure is formed such that a lowest part of the second conductivity type semiconductor layer contacts a lowest quantum well of the multiple quantum wells of the active layer through the second v-pit structure.

Abstract: The present invention provides a rear-wheel steering control technique. Specifically, a rear-wheel steering control apparatus for controlling rear-wheel steering control, according to an aspect of the present invention, may include: a vehicle data collection unit configured to receive vehicle data including at least one of steering angle data, steering torque data, vehicle speed data, yaw rate data, or lateral acceleration data; a vehicle data determination unit configured to determine whether or not the steering angle data included in the vehicle data is normal; and a rear-wheel steering control unit configured to generate a rear-wheel steering control signal for degradation rear-wheel control based on at least one of the steering torque data, the vehicle speed data, the yaw rate data, or the lateral acceleration data when the steering angle data is determined to be abnormal.

Abstract: An embodiment relates to an aromatic polythiol compound for optical materials, and the aromatic polythiol compound according to the embodiment contains a phenyl group and a large number of sulfur atoms in its polythiol structure so that a polymerizable composition and an optical material obtained therefrom have excellent optical properties such as high refractive index and low specific gravity, as well as excellent mechanical properties such as low cure shrinkage; thus, they can be advantageously used for producing various plastic optical lenses such as eyeglass lenses and camera lenses.

Abstract: A control apparatus for a rear wheel steering system is provided to control the rear wheel steering system by calculating a target rear wheel steering angle using sensors included in a parking assist system. The control apparatus includes a first sensor and a second sensor spaced apart from each other and mounted on a rear portion of a vehicle, a determiner configured to determine whether a trailer is mounted at a rear side of the vehicle using the first sensor or the second sensor, and a controller configured to control the rear wheel steering system according to a target rear wheel steering angle calculated using the first and second sensors when it is determined that the trailer is mounted at the rear side of the vehicle.

Abstract: The xylylene diisocyanate composition according to the embodiments has a chlorine content of 100 to 1,000 ppm to improve the stability, so that the degradation of the reactivity can be prevented even when it is stored for a long period of time. Therefore, even if the xylylene diisocyanate composition according to the embodiments is used after it has been stored for a long period of time for sale or the like, the xylylene diisocyanate composition can be polymerized with a thiol to produce a polythiourethane-based optical material having excellent properties such as refractive index, Abbe number, transparency, glass transition temperature, yellowness index, and the like. Therefore, it can be advantageously used in the field of eyeglass lenses, camera lenses, and the like.

Abstract: The present invention provides a rear-wheel steering control technique. Specifically, a rear-wheel steering control apparatus for controlling rear-wheel steering control, according to an aspect of the present invention, may include: a vehicle data collection unit configured to receive vehicle data including at least one of steering angle data, steering torque data, vehicle speed data, yaw rate data, or lateral acceleration data; a vehicle data determination unit configured to determine whether or not the steering angle data included in the vehicle data is normal; and a rear-wheel steering control unit configured to generate a rear-wheel steering control signal for degradation rear-wheel control based on at least one of the steering torque data, the vehicle speed data, the yaw rate data, or the lateral acceleration data when the steering angle data is determined to be abnormal.

Abstract: A nitride semiconductor light-emitting device and a method for manufacturing same for improving the electrostatic discharge (ESD) characteristics of the nitride semiconductor light-emitting device. The light-emitting device includes an active layer formed flat using a low conductivity material, on a first conductive semiconductor layer having a v-pit structure on the upper surface thereof, and a second conductive semiconductor layer, or has a v-pit structure on a junction surface between a second conductive semiconductor layer and an active layer formed flat using a low conductivity material on a first conductive semiconductor layer having a v-pit structure on the upper surface thereof. Thus, a v-pit area has a thickness equal to or greater than a critical thickness and thus has very low conductivity, thereby preventing the flow of a current.

Abstract: An apparatus and a method for providing a Long Term Evolution (LTE) service in an electronic device are provided. A method for operating an electronic device includes connecting to a first network, when being connected to the first network, receiving incoming call information of a second network, obtaining caller identification information of the incoming call information of the second network, and determining whether to connect a call based on the caller identification information.

Abstract: A method of controlling an active rear wheel steering apparatus according to the present invention is a method of controlling a rear wheel steering apparatus of a vehicle with the rear wheel steering apparatus, the method including a step of determining an operation state of the rear wheel steering apparatus, a step of determining a running mode of the vehicle, and a step of controlling the rear wheel steering apparatus of the vehicle according to a result of determining at least one of the operation state of the rear wheel steering apparatus and the running mode of the vehicle.

Abstract: An electronic device including a communication module configured to connect a packet based video call to a user equipment, an image processing module configured to generate a transmission image for the video call, and a control module configured to control a frame type of a transmission image generated by the image processing module based on tune-away information received from the user equipment.

Abstract: Provided are a photoelectrode including a zinc oxide hemisphere, a method of fabricating the same, and a dye-sensitized solar cell using the same. The photoelectrode includes a conductive substrate, a zinc oxide hemisphere disposed on the conductive substrate, and a porous metal oxide layer covering the zinc oxide hemisphere. Light scattering effects of photoelectrodes can be increased, and recombination losses of electrons can be minimized to improve photovoltaic properties.