Abstract: An application processing method for providing a group video call and a terminal for performing a group video call are disclosed. The application processing method of providing a group video call may include executing a group video call comprising a plurality of participants, based on a number of the participants, displaying views corresponding to the participants by pagination, based on a predetermined action of a first participant whose view is not displayed on a predetermined page of a plurality of pages generated by the pagination, selecting one of participants whose view is displayed on the predetermined page as a second participant, and displaying the views by swapping a position of the view corresponding to the selected second participant and a position of the view corresponding to the first participant.

Abstract: Disclosed is a small lens system including a first lens, a second lens, a third lens, and a fourth lens sequentially arranged from an object along an optical axis, wherein the thickness (ct1) of the first lens, the thickness (ct3) of the second lens, the thickness (ct5) of the third lens, and the thickness (ct7) of the fourth lens satisfy ct1+ct3>ct5+ct7, ct1>ct3, ct1>ct5, and ct1>ct7, the front surface of the first lens is convex toward the object while the sagittal amount of the first lens is increased depending on the height thereof, the refractive power (P2) of the second lens satisfies ?0.01 mm?1<P2<0.01 mm?1, the front curvature (C3) and the rear curvature (C4) of the second lens satisfy |C3|<0.1 mm?1 and |C4|<0.1 mm?1, and the f-number of the lens system is less than 1.4.

Abstract: A display device includes a substrate that includes a display area and a non-display area, a display layer disposed on the substrate and overlapping the display area, and a support plate disposed under the substrate. The support plate includes a first region disposed on a rear surface of the display layer, a second region connected to the first region and including a lattice pattern, and a third region connected to the second region and disposed on a rear surface of the first region. The second region is bent and overlaps a bending area of the non-display area of the substrate.

Abstract: The present invention relates to a BLDC motor controller for controlling a BLDC motor, and more particularly, to a BLDC motor controller that separates the ground of a battery power input line and the ground of an emergency operation signal line for an operation in an emergency operation mode, thereby preventing an abnormal operation in the emergency operation mode caused by noise.

Abstract: An on-board charger for an electric vehicle includes a vehicle port configured to be connected to an external charger comprising a first relay located on an internal first power supply path, a power converter, a second relay located on a second power supply path between the vehicle port and the power converter, and a controller configured to turn off the first relay and the second relay in response to triggering a vehicle-to-grid (V2G) protection operation based on power-related parameters.

Abstract: A battery container has improved energy density and can be used in an energy storage system. The battery container includes a container body, a coupling unit configured to couple different container bodies, and a load support unit configured to support a vertical load of the container body.

Abstract: A projection device mounted on a vehicle may include a display panel, a rotation bezel positioned to divide the display panel, a driving unit connected to the rotation bezel and rotating the rotation bezel, and a projector located behind the rotation bezel and projecting an image or a video. The rotation bezel may be located parallel to a front surface of the display panel in a first mode, and may be bent at a predetermined angle or more with the front surface of the display panel and expose the projector in a second mode. The projection device may project an image or a video onto the rotation bezel or a headlining of the vehicle through the projector located behind the rotation bezel by rotation of the rotation bezel.

Abstract: In order to implement the foregoing object, an exemplary embodiment of the present disclosure discloses a video retrieval method performed by a computing device. The video retrieval method may include: segmenting one or more video data into two or more unit video data; encoding, by one or more encoders comprised in a machine learning enabled key frame detection module, two or more unit video data; generating one or more key frame detection vectors for each of the two or more unit video data based on the result of the encoding; and generating feature vector of one or more retrieval video data based on a combination of one or more vectors among the key frame detection vectors.

Abstract: A positive electrode active material includes a first positive electrode active material that includes a lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the first positive electrode active material and is in a form of secondary particles in which a plurality of primary particles are agglomerated, a second positive electrode active material in a form of single particles including a lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the second positive electrode active material, and a third positive electrode active material in a form of particles including lithium manganese-based oxide. In addition, a positive electrode and a rechargeable lithium battery each including the positive electrode active material are disclosed.

Abstract: According to an embodiment of the disclosure, a display device may include an active layer, a gate electrode disposed on the active layer, a first insulating layer disposed on the gate electrode, entirely covering the gate electrode, and including a flat surface, and a second insulating layer disposed on the first insulating layer and including a flat surface, and the first insulating layer and the second insulating layer may include inorganic materials different from each other.

Abstract: A positive electrode active material includes: a first positive electrode active material including a lithium nickel-manganese composite oxide having a nickel content of at least about 60 mol % based on a total metal excluding lithium and being in a form of secondary particles each including a plurality of primary particles; and a second positive electrode active material including a lithium nickel-manganese-based composite oxide having a nickel content of at least about 60 mol % based on a total metal excluding lithium and being in a form of single particles and a coating layer on the surface of the single particle and containing aluminum and yttrium, an aluminum content of the coating layer being about 0.1 mol % to about 2 mol % and an yttrium content of the coating layer being about 0.1 mol % to about 1 mol %, based on a total metal excluding lithium in the second positive electrode active material.

Abstract: A positive electrode active material, a method of preparing the same, a positive electrode and a rechargeable lithium battery including the same are provided. The positive electrode active material includes core particles including a lithium nickel-manganese-based composite oxide having a nickel content (e.g., amount) of greater than or equal to about 60 mol % based on 100 mol % of a total metal in the positive electrode active material excluding lithium, and a coating layer disposed on the surface of the core particles and including Al, Zr, and Mg.

Abstract: Disclosed are semiconductor devices, three-dimensional memory devices, and manufacturing methods thereof. A disclosed semiconductor device is a semiconductor device including a transistor, and the transistor may comprise a polycrystalline layer in which crystal grains are vertically oriented, a channel layer in contact with a side surface of the polycrystalline layer and having a structure in which crystal grains are vertically oriented, a source and a drain provided on a first portion and a second portion of the channel layer, respectively, and a gate for controlling an electrical characteristic of the channel layer. The polycrystalline layer may have a discontinuous structure between the source and the drain, the channel layer may have a continuous structure between the source and the drain, and grain boundaries of the channel layer may be arranged in a direction non-parallel to a channel length direction between the source and the drain.

Abstract: A optical measurement apparatus includes: an optical system which generates a pupil image of a measurement target, using light; a polarization generator which generates a polarized light from the light; a self-interference generator which generates a plurality of beams divided from the pupil image, using the polarized light, and causes the plurality of beams to interfere with each other to generate a self-interference image; and an image analysis unit configured to extract phase data from the self-interference image, and to move the measurement target to a focus position on the basis of the phase data.

Abstract: A layout control system for a vehicle mode and a method therefor are provided. The layout control system includes: an input interface configured to receive information on a vehicle driving mode; a memory to store a program for controlling a layout of at least one of an in-vehicle display, a steering wheel, a seat for the vehicle driving mode, or any combination thereof; and a processor electrically connected to the memory, wherein, upon execution of the program, the processor controls the layout in at least one of a manual driving mode, a passenger seat entertainment display attachment mode, an operation mode during autonomous driving, a theater mode, a relax mode, or any combination thereof.

Abstract: A method of detecting a heart rate using a photoplethysmography (PPG) signal with a removed motion artifact includes receiving, by a heart rate measurement device, a PPG signal and an acceleration signal; converting, by the heart rate measurement device, the PPG signal and the acceleration signal into signals in a frequency domain; calculating, by the heart rate measurement device, a difference between the PPG signal and the acceleration signal in the frequency domain and obtaining a PPG signal with a removed motion artifact; and estimating, by the heart rate measurement device, a heart rate based on the PPG signal with the removed motion artifact.

Abstract: A system for controlling knob operating ranges in a vehicle mode conversion, and a method therefor are provided. The system includes: an input interface to receive input information related to a vehicle driving mode; a memory to store instructions of a program for controlling an operating range of a knob based on the input information; and a processor electrically connected to the memory. The processor, upon execution of the instructions of the program, transmits a control command to vary the operating range of the knob allocated to an area of an in-vehicle display, based on the input information for detachment of a passenger seat entertainment display and conversion to an autonomous driving mode.

Abstract: The present invention relates to the three-dimensional hydrogel composite with cancer cell targeting and apoptotic effects, and its preparing method. Specifically, it involves the three-dimensional hydrogel composite containing liquid metal particles that induce photothermal reactions upon near-infrared irradiation, along with chemically bonded anticancer agents for immobilization, and its preparing method. The three-dimensional hydrogel composite of the present invention is suitable for combination therapy involving photothermal treatment and chemotherapy. Therefore, it can be effectively utilized as a nano carrier for the treatment of various cancer cell types, contributing to a wide range of medical applications for effective cancer treatment.

Abstract: The present disclosure relates to a sulfide-based solid electrolyte having a new composition and a new crystal structure.

Abstract: Disclosed is a mobile negative pressure chamber, that includes a bed, a main cover separably coupled to the bed, and having a main cavity, an auxiliary cover coupled to one side of the bed to be separable, that seals the main cavity while being engaged with the main cover, and having an auxiliary cavity, in which a lower body of the surgical recipient is located in an interior thereof, a main treatment part provided in at least one of the main cover and the auxiliary cover, and provided with a glove mounted on an arm of the surgical operator, and an auxiliary treatment part provided in at least one of the main cover and the auxiliary cover, and into and from which the arm of the surgical operator or a medical instrument is inserted and extracted.