Abstract: The present invention relates to highly dispersible organic-inorganic hybrid ceria nanoparticles, a method for preparing the same, and an ionomer and ion exchange membrane having improved oxidation stability, including the organic-inorganic hybrid ceria nanoparticles.

Abstract: A negative electrode active material for an all-solid-state battery may include first graphite particles, second graphite particles, and silicon particles, wherein the first graphite particles have a spheroidal structure, the second graphite particles have a plate structure, the first graphite particles include about 30 to 80 parts by weight with respect to 100 parts by weight of the negative electrode active material, the second graphite particles include about 10 to 60 parts by weight with respect to 100 parts by weight of the negative electrode active material, and the silicon particles include about 5 to 15 parts by weight with respect to 100 parts by weight of the negative electrode active material.

Abstract: Provided is a method of preparing a coating composition for a separator of a secondary battery, and particularly a method including dispersing a first monomer and a surfactant in a solvent to form micelles, adding a first initiator to the solvent and performing first polymerization reaction to form a precursor solution including an emulsion-type binder, and adding a second monomer and a second initiator to the precursor solution and performing second polymerization reaction to form an aqueous binder solution including a solution-type binder, wherein the emulsion-type binder has a core shape, the solution-type binder has a shell shape wrapping the emulsion-type binder, and the emulsion-type binder and the solution-type binder are chemically bonded.

Abstract: The present disclosure includes a diorama space generation and construction module configured to construct an AR map by using a user camera image or image data received through a sensor, a diorama environment tracking and location optimization module configured to load the constructed AR map onto an AR device and track a location of the AR device in a diorama space in real time based on image data received in real time, and a multi-user association and event synchronization module including a user interaction module configured to perform user interaction processing, user event information processing and management, and AR content playback configured to perform interaction synchronization processing, content synchronization processing, and user information synchronization processing.

Abstract: Disclosed is a moving handrail sterilizing apparatus. The moving handrail sterilizing apparatus includes: a moving handrail; a first sterilizing unit which is disposed so as to be in contact with one side of the moving handrail and wipes away foreign substances on a surface of the handrail; a sterilizing panel which is disposed on one side of the first sterilizing unit and irradiates the first sterilizing unit with ultraviolet rays and plasma; a second sterilizing unit, which is spaced a certain distance from the first sterilizing unit along the direction in which the moving handrail moves, is provided below the moving handrail and provides a sterilizing agent to the moving handrail; and an air blower fan which is disposed between the second sterilizing unit and the moving handrail and blows air so that the sterilizing agent is uniformly supplied to the moving handrail.

Abstract: Provided is a lithium composite anode including a metal film, and lithium ion conductors and electron conductors dispersed on one surface of the metal film, wherein portions of the lithium ion conductors and electron conductors are impregnated into the metal film from the one surface of the metal film.

Abstract: Disclosed herein is a method and apparatus for stateful order-preserving encryption for enhancing security. The method includes generating an order-preserving ciphertext by performing order-preserving encryption on a plaintext, generating a plurality of dummy ciphertexts corresponding to a preset variable for the order-preserving ciphertext, and adding the order-preserving ciphertext and the plurality of dummy ciphertexts to a ciphertext set.

Abstract: Disclosed herein are a key generation apparatus and method based on machine learning. The key generation method includes generating, by first and second key generation apparatuses, first and second commit values, and uploading the first commit value and the second commit value to an external repository, training, by the first and second key generation apparatuses, a neural network so as to match weight values with each other, sharing, by the first and second key generation apparatuses, the first and second commit values with each other, comparing shared first and second commit values with uploaded commit values, and then verifying the commit values, and when verification of the commit values has succeeded, generating, by the first and second key generation apparatuses, hash values using the matched weight value, verifying whether the hash values are identical to each other, and generating a session secret key based on a result of verification.

Abstract: Provided is a lithium secondary battery including a first electrode, a second electrode spaced apart from the first electrode, a solid electrolyte disposed between the first electrode and the second electrode, wherein the solid electrolyte includes a fibril and a plurality of sulfide particles, the fibril includes polytetrafluoroethylene, the fibril surrounds at least some of the sulfide particles or is in contact with at least some of the sulfide particles.

Abstract: Disclosed are an optical modulation device and a phase modulation method using the same. The optical modulation device includes a reflection plate, an insulating film over the reflection plate, dielectric patterns aligned on the insulating film in a first direction and extended in parallel in a second direction intersecting the first direction, and first and second graphene patterns provided between the dielectric patterns aligned in the first direction and arranged in an alternating fashion. The first and second graphene patterns are in direct contact with the insulating film and the dielectric patterns are in direct contact with the insulating film at locations between the first and second graphene patterns. A width of each of the first graphene patterns in the first direction is different from a width of each of the second graphene patterns in the first direction.

Abstract: Provided is a cellulose derivative composition for a secondary battery binder, a method of preparing a composition for a secondary battery electrode, including the same, and a secondary battery including the same. According to the inventive concept, the cellulose derivative composition for a secondary battery binder may include a compound represented by Formula 1 below.

Abstract: Disclosed herein are an order-preserving encryption method and apparatus. The order-preserving encryption method may include when plaintext data is received from a client, storing a ciphertext database (DB), generated by encrypting the plaintext data, and a search index in a server, when a request for a range search query is received from the client, converting the range search query into a search index query statement, querying the server including search indices for the search index query statement, and querying the ciphertext DB of the server for an index ciphertext received in response to the query, and decrypting a ciphertext received as a response from the ciphertext DB and then transferring a plaintext-type response to the query statement to the client.

Abstract: Disclosed herein is an apparatus and method for verifying data validity. The method performed by the apparatus includes generating a zero knowledge proof key pair and a certificate using a key generation algorithm of zero knowledge proof in response to a request from a first device to issue a key, generating a verification certificate by verifying validity and quality of data after receiving the data and a verification request from the first device, and performing, by the first device, zero knowledge proof for the data in response to a proof request from a second device that buys the data possessed by the first device.

Abstract: The present disclosure relates to an air cleaner with an improved locking structure. The air cleaner includes a cabinet, a panel having a plurality of holes for discharging air to the front of the cabinet and detachably mounted on the cabinet, and a locking device to detachably connect the cabinet and the panel, wherein the locking device includes a first locking member disposed on the panel, and a second locking member disposed in the cabinet to lock or unlock the first locking member by being rotated by pressing of the first locking member.

Abstract: An apparatus for inspecting an electrode cell according to an embodiment of the present invention may inspect an electrode cell including a plurality of electrodes stacked with a separator therebetween, a plurality of tabs connected to the plurality of electrodes, and a lead bonded to the plurality of tabs. The apparatus for inspecting the electrode cell may include a heater configured to heat the lead; and a thermal detection sensor configured to detect a temperature distribution of the plurality of tabs heated by the heat conducted from the lead. Methods for inspecting an electrode cell are also provided.

Abstract: A refrigerator includes a main body having a storage compartment formed therein, and a cooling module forming a machine compartment in which a compressor is disposed and detachably mounted to the main body. The cooling module includes a module body forming the machine compartment, a condenser of an L shape disposed on one side of the compressor and including a first part corresponding to a portion of a rear surface of the machine compartment and a second part corresponding to one side of the machine compartment. The condenser is vertically mounted on a base plate disposed below the module body. A module cover is provided to cover the rear of the machine compartment, and a suction flow path includes first and second suction flow paths.

Abstract: The present invention relates to a protein food composition having low calories and a high bioabsorption rate, and to a method for providing diet information using same. The food composition according to one aspect of the present invention contains a protein having a high bioabsorption rate while having low calories, and contains a protein in an amount in a specific range, and thus enables a nutritionally balanced diet that can also prevent muscle loss, which is one of adverse side effects of weight loss. Accordingly, when ingesting the food composition according to the method of providing diet information according to one aspect of the present invention, obese patients who need weight control, including patients suffering from obesity, metabolic syndrome, non-alcoholic steatohepatitis, knee osteoarthritis, and diabetes can lose weight while minimizing adverse side effects, such as muscle loss and changes in blood pressure.

Abstract: Discussed is an electrode tab disconnection inspection apparatus of a battery cell that can include an impedance measurement part connected to electrode leads of a battery cell to be inspected, and configured to measure an impedance value according to a frequency of the battery cell; and a determination part configured to compare impedance value data according to the frequency of the battery cell to be inspected acquired by the impedance measurement part and a predetermined impedance value data group according to a frequency of normal battery cells having no disconnected electrode tabs or a frequency of tab disconnected battery cells having disconnected electrode tabs to determine whether the electrode leads of the battery cell to be inspected is disconnected.

Abstract: Provided is a lithium battery including a first electrode structure, a second electrode structure spaced apart from the first electrode structure, and an electrolyte between the first electrode structure and the second electrode structure, wherein the electrolyte includes a lithium salt, an organic solvent, and an additive, the additive includes a metal salt compound catalyst, the metal salt compound catalyst activates a polymerization reaction of a cyclic carbonate in the organic solvent at a first temperature, and the first temperature ranges between about 100° C. and about 200° C.

Abstract: An apparatus is provided for detecting an internal defect of a battery cell. The apparatus may include a time domain reflectometry (TDR) module configured to apply an electrical pulse to the battery cell and compare a reference waveform with a measurement waveform generated by detecting a reflected wave of the electrical pulse to determine whether a defect has occurred, and a signal line configured to electrically connect the TDR module to an electrode lead of the battery cell. The electrical pulse may be applied in a longitudinal direction of the battery cell. A method of detecting an internal defect of a battery cell is also provided.