Abstract: A nasal cannula according to an embodiment of the present invention includes: an oxygen supplying portion which forms a space inside in which a nose and a mouth of a user can be disposed and is able to supply oxygen in a state of being put on by the user into the nose of the user; and a mask portion to which the oxygen supplying portion is attached in a detachable manner therein and is configured to be put on a face of the user. Since a space in which a nose and a mouth of a user can be disposed is provided inside the oxygen supplying portion so that a user can put on the nasal cannula in a convenient state and the oxygen supplying portion is put on in a state of being supported by the mask portion, oxygen can be supplied into the nose of the user and at the same time external air can be filtered.

Abstract: A method for reporting channel state information of a terminal comprises: a step of measuring CSI-RS transmitted from a base station; and a step of reporting CSI generated on the basis of the CSI-RS measurement to the base station, wherein the CSI comprises: a PMI for indicating a precoding matrix from a codebook and an RI for indicating a rank, wherein the PMI comprises a first PMI for a beam group selected by the terminal and a second PMI which comprises a beam sub-group selection information for beams included in the beam group and phase-matching information for each antenna port polarization for the selected beam sub-group, and wherein as the rank increases, the phase-matching information may be indicated with different granularity from each other depending on whether the beam sub-groups selected from the beam group are the same or different.

Abstract: Provided are a prediction value correction method and apparatus. The prediction value correction method includes steps of: (a) determining a prediction condition to be predicted; (b) receiving past prediction values and past measurement values according to the determined prediction condition; (c) filtering the past prediction values and the past measurement values by using an H-infinity filter to obtain an output value for a final time point; (d) estimating a future bias for a date and time point to be predicted by using the output value of the H-infinity filter; and (e) correcting a future prediction value for the date and time point to be predicted by using the estimated future bias to obtain a corrected future prediction value for the date and time point to be predicted.

Abstract: The present disclosure relates to a search technology using a data structure for supporting multi-search in a blockchain-based IoT environment, and a method for providing a search function for blockchain includes receiving block data via a network, verifying transactions included in the received block data, and adding the block data as a node to an index tree of multidimensional index structures based on information about each transaction in the transaction verification.

Abstract: The present disclosure provides a system for electrochemical conversion of carbon dioxide, including: a reduction electrode unit to which carbon dioxide is supplied and including a metal-containing electrode; an oxidation electrode unit including a sacrificial electrode; and an electrolyte unit including an aprotic polar organic solvent and an auxiliary electrolyte, which is in contact with the reduction electrode unit and the oxidation electrode unit, and the carbon dioxide supplied to the reduction electrode unit is electrochemically reduced so as to produce an oxalate salt.

Abstract: A method for a traffic volume publication system to publish traffic volumes in a road traffic network includes: receiving traffic information including information on a plurality of road segments and original traffic volume data for the road segments at a first timestamp and calculating a first window size for each road segment for the first timestamp; predicting a second window size for a third timestamp subsequent to the first timestamp, either based on the first window size calculated at the first timestamp or based on the first window size and a window size calculated in advance at a second timestamp prior to the first timestamp; determining a privacy budget allocated to the first timestamp based on the first window size and the second window size; and returning noisy traffic volume data which is obtained by inserting noise into the original traffic volume data, based on the determined privacy budget.

Abstract: Disclosed is a carbon dioxide absorbent and a carbon dioxide separation method using the same that greatly reduces energy consumption due to a small amount of latent heat required in regeneration of absorbents, enhances CO2 absorption rate, undergoes almost no thermal denaturation even at high temperatures while absorbing carbon dioxide, and results in a considerable reduction of the cost associated with absorption of carbon dioxide.

Abstract: Provided is a method for beamforming by using maximum likelihood estimation in a speech recognition apparatus, including: (a) receiving an input signal (Xn,k) at a time frame n and a frequency k where noise is mixed: (b) determining a probability density function for a target signal (Yn,k) obtained by removing the noise from the input signal satisfies a complex generalized Guassian distribution or a complex gamma distribution where an average value is zero in a time-frequency domain; (c) estimating a variance (?n,k) of the target signal so as to maximize log likelihood for the probability density function; (d) estimating a filter (wk) maximizing a cost function so as to maximize the log likelihood for the probability density function; and (e) repeatedly performing the estimation of the steps (c) and (d) until the filter (wk) coverages, and finally acquiring a final filter (wk).

Abstract: A beam deflector, a holographic display device including the beam deflector, and a method of driving the beam deflector are provided. The beam deflector includes first electrodes spaced apart from each other on a first substrate, second electrodes spaced apart from each other on a second substrate, a liquid crystal layer between the first substrate and the second substrate, and a controller configured to cause active prisms to be formed in the liquid crystal layer and to form a floating zone by turning off a voltage of at least one of the first electrode and the second electrode disposed between adjacent ones of the active prisms.

Abstract: The present invention provides a method for inducing differentiation of neural stem cells. The present invention provides optimized differentiation conditions of neural stem cells into neurons using a patterned hydrogel.

Abstract: The present invention provides a method and a kit for half coating nanoparticles. According to the present invention, nanoparticles can be half coated in a relatively simple and economical process that can replace complicated processes, such as chemical synthesis, of a conventional Janus nanoparticle-preparing method.

Abstract: The present disclosure relates to a method of preparing a carbon-silicon composite electrode material including silicon nanoparticles and an inverse opal-structured porous carbon structure, the carbon-silicon composite electrode material prepared by the method, and a secondary battery including the carbon-silicon composite electrode material.

Abstract: The present disclosure relates to technology that performs encrypted communication via a network or a bus, and a communication method using a security key between nodes connected via a network or a bus includes setting a critical cluster among multiple nodes, selecting a primary message shared between the set critical clusters, and encrypting a message using a key generated to be valid for a preset period to enable communication between the critical clusters, wherein each of the critical clusters stores the primary message for the preset period according to a same key generation scheme to generate a block, and generates and possesses a new key based on the generated block and a currently used key, so that information about a previous message and a previous key is sequentially accumulated in the new key.

Abstract: Disclosed is a system for controlling access of one or more applications to a storage device, including: a storage device including one or more memories; and a kernel implemented between the applications and the storage device, in which when the kernel receives a first access request to the storage device from a first application, the kernel transmits to the storage device first memory address information to be accessed by the first application and a first access code included in the first access request, and the storage device stores a database for an authorized access code for each memory address information and controls the first application to access a memory corresponding to the first memory address information according to whether the first memory address information and the first access code are present in the database.

Abstract: Disclosed is a transistor including a substrate, first and second type wells in contact with each other on the substrate; and a breakdown voltage improving region including vertical high concentration doped regions according to first and second types vertically in contact from upper surfaces of the first and second type wells to an upper surface of the substrate in a portion where the first and second type wells are in contact with each other.

Abstract: A ceria-carbon-sulfur (CeO2—C—S) composite including a ceria-carbon (CeO2—C) composite in which cylindrical carbon materials having ceria (CeO2) particles bonded to surfaces thereof are entangled and interconnected to each other in three dimensions; and sulfur introduced into at least a portion of an outer surface and an inside of the ceria-carbon composite, a method for preparing the same, and positive electrode for a lithium-sulfur battery and a lithium-sulfur battery including the same.

Abstract: An apparatus for producing a natural gas using carbon dioxide and water in air that includes an air-compressing member, a water collecting member, a water storing member, a carbon dioxide collecting member, a water electrolysis member, and a methanation reaction member. The water electrolysis member electrolyzes water separated from compressed air. The methanation reaction member generates a natural gas by reacting hydrogen from the electrolysis and carbon dioxide from the carbon dioxide collecting member. A method of producing a natural gas using carbon dioxide and water in air includes supplying hydrogen electrolyzed from water separated from air and carbon dioxide collected from the dry air to a methanation reaction member to generate a natural gas. A natural gas-synthesizing equipment system includes an apparatus for producing a natural gas using carbon dioxide and water in air.

Abstract: Provided is a plasma diagnosis system using multiple-path Thomson scattering, including: a laser which supplies laser pulse; an optical system which is configuring to focus alternately a vertical polarization of the laser pulse and a horizontal polarization of the laser pulse on first and second focal points in a plasma; a collection optic which collects lights scattered from the first and second focal points in plasma; a polychromator which filters the lights collected by the collection optics according to spectral characteristics; and a computer which measures spectral characteristics by using the filtered lights. Thomson scattered light which is contaminated with noise due to stray lights is produced in the first collected scattering while the noise due to stray lights is produced in the second collected scattering.

Abstract: Provided is a plasma diagnosis system using multiple-reciprocating-pass Thompson scattering.

Abstract: Provided are an proton conducting polymer electrolyte membrane and a manufacturing method thereof which control the proton conducting nanochannel size and proton conductivity by phase separation improvement of a polar aprotic solvent in casting the proton conducting polymer electrolyte membrane.