Abstract: Embodiments disclose a display panel and a display device including the display panel. The display panel includes a first area in which a plurality of first pixels are disposed, a second area including a pixel area in which a plurality of second pixels are disposed and a plurality of light-transmitting areas disposed between the plurality of second pixels, and a polarizing plate including a plurality of first light-transmitting patterns disposed in the plurality of light-transmitting areas, wherein, in the polarizing plate, an area in which the first light-transmitting patterns are formed has a higher light transmittance than a remaining area in which the first light-transmitting patterns are not formed.

Abstract: A method for preparing (meth)acrylic acid, including: bringing a mixed gas including (meth)acrylic acid into contact with water in an absorption column to obtain first and second aqueous (meth)acrylic acid solutions; discharging the first aqueous (meth)acrylic acid solution from a lower portion of the absorption column and supplying the solution to a crystallizer, and discharging the second aqueous (meth)acrylic acid solution from a side portion of the absorption column; supplying the second aqueous (meth)acrylic acid solution to a water separation column to obtain a distillate; supplying the distillate to a high-boiling-point by-product separation column, and supplying an upper discharge stream from the high-boiling-point by-product separation column to the crystallizer; and obtaining purified (meth)acrylic acid in the crystallizer, and circulating a part of mother liquor recovered in the crystallizer to the absorption column and the remainder to the water separation column.

Abstract: The semiconductor memory device including a bit line in a first direction on a substrate, a channel structure on the bit line, and including a first vertical part in a second direction, and a second vertical part apart from the first vertical part in the first direction and in the second direction, a back-gate electrode on the bit line on a side of the channel structure and in the second direction, a back-gate insulating film between the back-gate electrode and the channel structure, a back-gate capping film on the back-gate electrode and the back-gate insulating film, a first and second word lines between the first and the second vertical parts and in the second direction, the second word line spaced apart from the first word line in the first direction and first and second capacitors connected to the first and second vertical parts, on the first and second vertical parts.

Abstract: A method for preparing a (meth)acrylic acid, the method including: bringing a mixed gas containing (meth)acrylic acid into contact with water in an absorption column to obtain a (meth)acrylic acid aqueous solution; supplying the (meth)acrylic acid aqueous solution to a crystallizer, performing crystallization to obtain purified (meth)acrylic acid, and supplying a mother liquor separated from the purified (meth)acrylic acid to a water separation column; separating, in the water separation column, an upper discharge stream containing water and a lower discharge stream containing (meth)acrylic acid and high-boiling by-products; and supplying the lower discharge stream of the water separation column to a high boiling point by-product separation column, and supplying an upper discharge stream of the high-boiling point by-product separation column containing (meth)acrylic acid to the crystallizer.

Abstract: A method for preparing (meth)acrylic acid, including: contacting a mixed gas containing (meth)acrylic acid with water in an absorption column to obtain a (meth)acrylic acid aqueous solution; crystallizing the (meth)acrylic acid aqueous solution in a crystallizer to obtain purified (meth)acrylic acid and a mother liquor; supplying a part of the mother liquor to an extraction column; contacting the mother liquor with an extraction solvent in the extraction column to obtain a raffinate and an extract, and then supplying an extract stream including the extract to a water separation column; separating, in the water separation column, into a water separation column upper discharge stream and a water separation column lower discharge stream; and supplying the water separation column lower discharge stream to a high-boiling-point by-product separation column, and supplying an upper discharge stream of the high-boiling-point by-product separation column containing (meth)acrylic acid to the crystallizer.

Abstract: A method for calculating an altitude of a target through an apparatus for calculating an altitude of the target, which comprises a plurality of MIMO radar virtual antennas, may comprise: receiving electromagnetic waves reflected from the target through a pair of virtual antennas classified into an upper antenna and a lower antenna and alternately arranged in two columns linearly; obtaining range information and phase information of the target from the pair of virtual antennas by analyzing the electromagnetic waves; and calculating altitude information of the target from position information of the pair of virtual antennas, and the range information and the phase information.

Abstract: Exemplary embodiments provide a radar apparatus having a plurality of antenna elements and enabling to reduce a number of ADCs as long as being allowable according to a bandwidth of the ADC, reduce a chip area occupied by the ADC and interconnections in an integrated circuit, and prevent a synchronization problem between the ADCs by sampling receive signals of multiple channels at once. Frequencies of local oscillation signals used for downconverting receive signals are set to be different from each other by an amount of an offset frequency, so that each of band-limited receive signals obtained through respective RF paths may occupy a different position on a frequency axis of a frequency domain. Downconverted receive signals are combined into a single signal and converted into a single digital signal stream, and a signal processing of the digital signal stream in a digital domain enables to obtain target data.

Abstract: A blood pressure measurement method using at least one radar in a blood pressure measurement apparatus may comprise: measuring a radar signal for at least one body part; extracting a heartbeat signal from the radar signal; selecting one or more peak signals from the heartbeat signal; calculating an area under a curve (AUC) of each of the selected one or more peak signals; and calculating blood pressure from the calculated AUC on the basis of a derived relational expression between AUC and blood pressure.

Abstract: Provided is a method of manufacturing a silica aerogel, which includes: (1) manufacturing a hydrogel composite; (2) washing the manufactured hydrogel composite with a washing solvent; and (3) drying the washed hydrogel composite, wherein, impurities are removed from the hydrogel composite in Step (2), and the washing solvent is heated to a temperature equal to or higher than the boiling point (b.p.) of the washing solvent.

Abstract: An operation method of a radar signal processing apparatus in a radar system may include: generating pulse signals of a number of any one sampling rate having different phases; transmitting the pulse signals to a target; receiving reflected pulse signals reflected back from the target; generating a composite signal by sampling the reflected pulse signals and combining the sampled reflected pulse signals to match the phases; and extracting target information from the composite signal.

Abstract: An operation method performed by an apparatus for detecting multiple targets may comprise transmitting first signals using Mt transmit antennas included in the apparatus; receiving the first signals reflected by the multiple targets through Mr receive antennas included in the apparatus; generating a first function for estimating a velocity and an azimuth of each of the multiple targets using the first signals and the reflected first signals; estimating a velocity and an azimuth that maximize a result of the first function as a velocity and an azimuth of a first target closest to the apparatus among the multiple targets; generating a second function by cancelling interference caused by the first target from the first function; and estimating a velocity and an azimuth that maximize a result of the second function as a velocity and an azimuth of a second target among the multiple targets.

Abstract: Disclosed is a radar detection assistant apparatus for increasing detection accuracy when detecting an object using a radar detection device. The radar detection assistant apparatus includes a radar signal receiver for adjusting a radar candidate signal received through a reception antenna to a predetermined magnitude and filtering out a signal other than the radar candidate signal, a radar signal analyzer for receiving the radar candidate signal from the radar signal receiver and determining whether or not the radar candidate signal is a preset radar signal, a radar signal production controller for generating a control signal for an assistant apparatus production signal or an assistant apparatus reproduction signal on the basis of at least one of pieces of information on a type, a bandwidth, and a period of the radar candidate signal received from the radar signal analyzer, and a radar signal producer.

Abstract: A method for calculating an altitude of a target through an apparatus for calculating an altitude of the target, which comprises a plurality of MIMO radar virtual antennas, may comprise: receiving electromagnetic waves reflected from the target through a pair of virtual antennas classified into an upper antenna and a lower antenna and alternately arranged in two columns linearly; obtaining range information and phase information of the target from the pair of virtual antennas by analyzing the electromagnetic waves; and calculating altitude information of the target from position information of the pair of virtual antennas, and the range information and the phase information.

Abstract: The present invention relates to an energy saving method for separating an unreacted monomer, by which an unreacted monomer may be easily recovered from a mixture solution including an unreacted monomer, and a separation system which is capable of performing the method.

Abstract: Disclosed are a low-power communication method and a low-power communication apparatus in a communication system. A low-power station may comprise a processor; a memory storing at least one instruction executable by the processor; a receiver for receiving a WUR PPDU according to the at least one instruction; and a transceiver for transmitting and receiving a legacy PPDU according to the at least one instruction, and the at least one instruction may be configured to cause the receiver to receive a WUR wake-up frame from the access point in an on-duration within a WUR duty cycle period; when the WUR wake-up frame is received, cause the processor to transmit a first signal requesting wake-up to the transceiver; and when the first signal is received, cause the transceiver to transition from a sleep state to a wake-up state at a TWT configured between the access point and the low-power station.

Abstract: Disclosed is a method for scheduling an uplink transmission in a communication network. A terminal operation method comprises the steps of: detecting a control channel of a subframe #n transmitted from a base station; receiving an uplink grant from the control channel; and transmitting, to the base station, a plurality of subframes scheduled by the uplink grant. Thus, the performance of the communication network may be improved.

Abstract: The present invention relates to an energy saving method for separating an unreacted monomer, by which an unreacted monomer may be easily recovered from a mixture solution including an unreacted monomer, and a separation system which is capable of performing the method.

Abstract: The present invention relates to a method for transmitting uplink data in a spectrum sharing wireless communication system wherein, in order to enhance uplink transmission efficiency in an LTE-U service, clear channel assessment (CCA) is performed on a user terminal so as to consider the hidden node problem, and channel occupation based on an uplink signal of another terminal is considered, wherein applied are: a method for generating and transmitting a random backoff counter value at a base station so that all terminals can equally use a channel connection parameter needed for transmitting an uplink subframe in an unlicensed band; and a downlink controlling method for scheduling an uplink multi-subframe.

Abstract: Disclosed is a method for communicating in a network supporting licensed and unlicensed bands. A terminal operation method comprises the steps of: detecting a control channel of a subframe #n transmitted from a base station; obtaining, from the control channel, a DCI for an uplink grant; executing channel sensing on the basis of channel connection-related information included in the DCI; and transmitting, to the base station, a subframe #(n+1) if the result of executing channel sensing is an idle state. Thus, the performance of the communication network may be improved.

Abstract: Disclosed are operation methods of a communication node in a network supporting licensed and unlicensed bands. An operation method of a user equipment (UE) may comprises receiving, from a base station, a physical downlink control channel (PDCCH) including downlink control information (DCI) in a subframe n?1 of an unlicensed band; decoding the DCI using a common radio network temporary identifier (RNTI); and identifying the number of symbols of the subframe n?1 or a subframe n based on the decoded DCI. Therefore, a performance of the network can be enhanced.