Abstract: A stretchable transparency-adjusting film includes an inner elastic part having a three-dimensional network shape and including a first elastomer, an inorganic thin film surrounding the inner elastic part, and an outer elastic part surrounding the inorganic thin film and including a second elastomer. A scattering unit defined by the inner elastic part, the inorganic thin film and the outer elastic part in a cross-section is orientated in an inclined direction to a vertical direction and a horizontal direction.

Abstract: The disclosed pre-concentrator comprises: a base substrate having a trench; a metal layer conformally disposed along the inner surface of the trench; and a three-dimensional porous nanostructure disposed on the metal layer in the trench and having aligned pores connected to each other in three dimensions. The pre-concentrator can improve the concentration performance of a sample and the thermal desorption efficiency of a concentrated sample.

Abstract: An apparatus for vapor jet deposition includes a source vapor generation part generating a source vapor, and a nozzle part including a diffusion block diffusing the source vapor, a nozzle plate including a plurality of nozzles, and a coupling member disposed between the diffusion block and the nozzle plate to combine the diffusion block with the nozzle plate. A thermal expansion coefficient of the coupling member has a value between a thermal expansion coefficient of the diffusion block and a thermal expansion coefficient of the nozzle plate. The coupling member includes a glass material. A softening temperature of the coupling member is equal to or less than about 400° C.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure provides an apparatus and a method for handling a network attack in a software defined network (SDN). The method for handling a network attack in an SDN according to various embodiments of the present disclosure includes detecting a first candidate of the network attack in a flow during a first time interval, in response to detecting the first candidate, changing quality of service (QoS) of the flow from first QoS to second QoS, detecting a second candidate of the network attack in the flow of the second QoS during a second time interval following the first time interval, and in response to detecting the second candidate, blocking the flow.

Abstract: A compression wheel for a turbocharger includes: a wheel hub; and a plurality of blades that are arranged around the wheel hub in a spiral shape, where a round portion is provided at a tip of a leading edge of each of the blades.

Abstract: Disclosed are a method of detecting a neuron resonance signal and an MRI signal processing apparatus. The method of detecting a neuron resonance signal includes acquiring a plurality of different digital sequences respectively corresponding to a plurality of different repetition periods by sampling a magnetic resonance signal of a neuron resonance signal according to each of the plurality of different repetition periods and calculating correlation between the plurality of different digital sequences in a frequency band based on the plurality of different digital sequences.

Abstract: A beam-forming circuit includes a multi mode power amplifier, a variable gain low noise amplifier, a variable gain phase shifter and a first switch circuit. The multi mode power amplifier amplifies a first RF intermediate signal generated based on a first RF input signal to generate a first RF output signal and performs a first transmission gain adjustment function based on a first control signal in a transmission mode. The variable gain low noise amplifier amplifies a second RF input signal to generate a second RF intermediate signal and performs a first reception gain adjustment function based on a second control signal in a reception mode.

Abstract: An image processing method and apparatus using a line unit operation is disclosed. The image processing apparatus includes a receiver configured to receive an image, at least one first line buffer configured to output the received image to be an image line of a line unit, a first convolution operator configured to generate a feature map by performing a convolution operation based on the output image line, and a feature map processor configured to store the generated feature map as at least one line unit and process the feature map stored as the line unit to be output in a two-dimensional (2D) form.

Abstract: A method for detecting a GPS spoofing attack using a difference between output values of a GPS receiver, which is generated due to inaccuracy of a GPS spoofer, and an apparatus therefor are provided. The method includes receiving a GPS signal; and determining the received GPS signal as a GPS satellite signal or a GPS spoofing signal using a learning model learned based on a difference between output values of a GPS receiver. The method further includes labeling and collecting dispersion degree data including a position, a speed, and a time output from the GPS receiver with whether the GPS signal is the GPS satellite signal or the GPS spoofing signal and modeling the learning model using the collected data.

Abstract: Disclosed are a neural network-based training method, inference method and apparatus. The neural network-based inference method includes receiving a quantization level for quantizing a weight of a neural network and an activation value that is processed by the neural network, receiving a weight quantized based on the quantization level, generating a quantized activation value by quantizing the activation value based on the quantization level, and performing inference based on the quantized weight and the quantized activation value.

Abstract: A foot stretching/checkup device includes: a motor unit; a footrest unit including a lower footrest configured to be rotated about a first rotation axis, an upper footrest configured to be rotated about a second rotation axis and a connecting member connecting the upper footrest and the lower footrest; and a coupling unit including an arm portion rotated by the motor unit and a rotary coupler coupled to the upper footrest. The upper footrest is configured to be rotated by a predetermined angle about the second rotation axis by the rotation of the arm portion. The lower footrest is configured not to be rotated about the first rotation axis by rotation of the arm portion until the upper footrest is rotated by the predetermined angle.

Abstract: Provided are an orbital angular momentum (OAM)-based transmitter, receiver, and communication method employing a radial concentric uniform circular array (UCA). The OAM-based communication method includes transmitting, by a transmitter, OAM multimode signals through a UCA-based transmitting antenna and receiving, by a receiver, the OAM multimode signals through a radial concentric UCA structure antenna including a plurality of UCA antennas. The plurality of UCA antennas each have the same number of antenna elements, and antenna elements having the same sequence number in the plurality of UCA antennas are on the same radial line in the radial concentric UCA structure antenna.

Abstract: Disclosed are a hyperspectral imaging method and an apparatus thereof. A method of reconstructing a hyperspectral image includes receiving an image photographed through a diffractive optical element and reconstructing a hyperspectral image of the received image based on the received image and information about a point spread function for each wavelength of the diffractive optical element. The diffractive optical element may generate an anisotropic shape of the point spread function that varies with a spectrum.

Abstract: The method for manufacturing the heterojunction circuit according to one embodiment of the present disclosure comprises depositing a first electrode on at least a part of a waveguide, moving a semiconductor comprising a second electrode at a lower end thereof onto the first electrode, and depositing a third electrode on an upper end of the semiconductor, wherein the waveguide and the semiconductor comprise different materials. Additionally, the moving step further comprises generating microbubbles by supplying heat to at least a part of the semiconductor, moving the semiconductor on the first electrode by moving the generated microbubbles, and removing the microbubbles by positioning the semiconductor on the first electrode.

Abstract: A dual-polarized antenna with high isolation is disclosed. A first differential signal feeding unit extends from a first input port toward one side of a patch radiator through a dielectric substrate, and is branched into a balun structure to provide first and second feeding probes for differentially feeding vertically polarized signals to opposite first and second portions of the patch radiator. A second differential signal feeding unit extends from a second input port toward another side of the patch radiator through the dielectric substrate, and is branched into the balun structure to provide third and fourth feeding probes for differentially feeding horizontally polarized signals to opposite third and fourth portions of the patch radiator. When feeding the vertically polarized signals through the first and second feeding probes, a virtual ground region in which there is little electric field is formed in the center portion of the patch radiator.

Abstract: A memory system includes a memory device including a plurality of memory cells, and a controller configured to access the plurality of memory cells. The controller includes a data read block configured to read first data from one or more pages included in first memory cells, determine a target memory cell subject to a compensation based on the first data, and read second data from one or more pages of second memory cells adjacent to the target memory cell, and an equalizer configured to convert the second data into symbol interfering data, check a probability of the first data from a lookup table according to the symbol interfering data, and determine the compensation on the first data based on the probability.

Abstract: A method for simultaneous design of a hybrid transceiver in an OFDM-based wideband multi-antenna system is provided. The method comprises: designing transmission/reception analog beamforming commonly used for each subcarrier by using product information of subcarrier channel information; and designing baseband beamforming for an effective channel of each subcarrier.

Abstract: A wall-climbing drone using an auxiliary arm and a method for controlling therefore are disclosed. The wall-climbing drone according to an example of embodiments includes at least one front wheel for moving a drone on a wall by being attached on one surface of a body in contact with the wall and controlling rotation by a wall-climbing motor; an auxiliary arm including a link having one degree of freedom connected to a part of the body and changing an angle and an auxiliary wheel attached to an end of the link; a power transmission system for controlling power transmission by connecting a belt between the body and the auxiliary arm and using the belt; and a controlling unit for controlling propulsion force of each of at least one propellant according to an angle between the auxiliary arm and the body in a state attached to the wall, controlling power transmission of the power transmission system, and controlling movement of the drone by controlling rotation of the motor.

Abstract: Disclosed are a method, an apparatus, and a system for inspecting a ball grid array-type semiconductor chip package. A first embodiment of the present invention provides an apparatus for inspecting a semiconductor chip package, the apparatus comprising: a first image acquisition unit for acquiring a reference image using a three-dimensional image of a semiconductor chip serving as a reference, the reference image being obtained by removing a region of interest from the three-dimensional image; a second image acquisition unit for acquiring a two-dimensional image of a semiconductor chip to be inspected; and an image processing unit for deriving an image of a region of interest of the semiconductor chip to be inspected, from the difference between the reference image and the two-dimensional image.

Abstract: A processor-implemented light source information output method includes: receiving an input image; detecting, using a trained neural network, at least one object in the input image; estimating, using the trained neural network, light source information of a light source corresponding to the at least one object; and outputting the light source information.