Abstract: A positive electrode active material includes a lithium composite transition metal oxide. The positive electrode active material is a secondary particle in which primary particles are aggregated. The primary particle includes a coating portion containing an M1 metal, and the coating portion is locally present on surfaces of the primary particles or at inter-particle boundaries of the primary particles. A preparation method thereof, and a lithium secondary battery including the positive electrode active material are also provided.

Abstract: Disclosed is a method for operating and participating in a voice chat room subordinate to a message chat room is disclosed. The method for operating a voice chat room subordinate to a message chat room includes: managing, by a server, messages transmitted and received through the message chat room in which a first user and a second user participate; receiving, by the server, a request for creation of the voice chat room subordinate to the message chat room from the first user; creating, by the server, the voice chat room in response to the received request for creation of the voice chat room; providing, by the server, information that the voice chat room is being operated to the second user through the message chat room; providing, by the server, information that the voice chat room is being operated to the second user through a message chat room list.

Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes a lithium-transition metal composite oxide particle including a plurality of primary particles, and the lithium-transition metal composite oxide particle includes a lithium-sulfur-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.

Abstract: A display device includes a pixel including a first sub-pixel to third sub-pixels, each arranged in a first direction and emitting light of a color, a first to third vertical power lines, each extending in a second direction different from the first direction, overlapping the first to third sub-pixels, respectively, and transmitting first to third powers, respectively, a first to third horizontal power lines, each extending in the first direction and electrically connected to the first to third vertical power lines through a contact hole, respectively. Voltages of the first power, the second power, and the third power are different from each other.

Abstract: The bio-degradable foam prepared from a composition comprising a polyhydroxyalkanoate (PHA) resin of which crystallinity is controlled can be biodegraded even in the ocean while having excellent physical properties, thermal property and processability, and can be effectively prepared by means of supercritical carbon dioxide foaming and the like.

Abstract: The present invention relates to a cytokine trimer domain in which a first monomer and a second monomer linked by linker (dimer) and a third monomer are coupled by a knob-into-hole and a novel type of fusion protein in which antibody and cytokine trimer domains are linked (receptor-antibody conjugated (cell) engager, RACE) prepared by replacing a constant region (Fc) of an antibody with the cytokine trimer domain, and RACE according to the present invention exhibits superior binding ability to the target receptor than the parent antibody as well as excellent simultaneous binding ability to the antigen and the target receptor, which can be usefully utilized as a bispecific pharmaceutical composition.

Abstract: The present invention relates to a method for vitrification and thawing of oocytes of animals for somatic cell cloning. More specifically, the present disclosure relates to a method for vitrification and thawing of canine oocytes, and to thus produced frozen-thawed oocytes. In a conventional approach of the vitrification-frozen oocyte production for the dog, an estrous cycle may not coincide with an experimental schedule. However, the method for vitrification and thawing of the canine oocyte according to the present disclosure and the resulting frozen-thawed oocyte allows an experimental schedule to coincide with the estrous cycle, resulting in high nuclear transfer and fertilization effects.

Abstract: The present invention relates to a lithium composite oxide capable of improving capacity and lifetime characteristics of a lithium secondary battery and a lithium secondary battery including the same. According to the present invention, since the atomic ratio of boron (B) and nickel (Ni) in the surface region of the lithium composite oxide including primary particles enabling lithium intercalation and deintercalation and secondary particles formed by aggregating the primary particles is in a specific range, the stability of the lithium composite oxide may be improved, and thus it is possible to improve the capacity and lifetime characteristics of the lithium secondary battery using the lithium composite oxide as a positive electrode active material.

Abstract: A display device includes a plurality of first pixels disposed in a first pixel area and initialized by a voltage of a first initialization power source, a plurality of second pixels disposed in a second pixel area and initialized by a voltage of a second initialization power source different from the first initialization power source, a data driver that supplies a data signal to a plurality of data lines connected to the first pixels and the second pixels, and a scan driver that supplies a scan signal to a plurality of scan lines connected to the first pixels and the second pixels. A black data signal supplied from the data driver to the first pixels and a black data signal supplied from the data driver to the second pixels are set to the same voltage.

Abstract: The organic compound represented by chemical formula 1 of the present disclosure can implement excellent hole injection and hole transport characteristics. In addition, the hole transport auxiliary layer of the organic light emitting diode of the present disclosure can improve the driving voltage, efficiency, and lifetime characteristics of the organic light emitting diode by including the organic compound represented by Chemical Formula 1 of the present disclosure.

Abstract: A negative electrode and a secondary battery including the negative electrode, the negative electrode includes a negative electrode active material layer containing negative electrode active material particles and an additive. The additive is present in an amount of 1.8 parts by weight to 3.2 parts by weight based on 100 parts by weight of the negative electrode active material particles. The additive includes at least one selected from the group consisting of Li1+m1Alm1Ti2?m1(PO4)3, wherein 0<m1?1, Li1+m2Alm2Ge2?m2(PO4)3, wherein 0<m2?1, Li3m3La2/3?m3TiO3, wherein 0.2?m3?0.05, and Li3m4La2/3?m4ZrO3, wherein 0.2?m4?0.05 (LATP, LAGP, LLTO, and LLZO, respectively).

Abstract: A display device includes a substrate, a corrosion prevention layer on the substrate and including an inorganic material, a first conductive layer on the corrosion prevention layer and including aluminum or an aluminum alloy, a first insulating film on the first conductive layer, a semiconductor layer on the first insulating film and including a channel region of a transistor, a second insulating film on the semiconductor layer, and a second conductive layer on the second insulating film and including a barrier layer, which includes titanium, and a main conductive layer, which includes aluminum or an aluminum alloy, wherein the semiconductor layer includes an oxide semiconductor, and the barrier layer is between the semiconductor layer and the main conductive layer and overlaps the channel region of the transistor.

Abstract: A positive electrode for a lithium secondary battery includes a first positive electrode active material layer on the current collector and_a second positive electrode active material layer on the first positive electrode active material layer. The second positive electrode active material layer includes bimodal positive electrode active materials including positive electrode active material secondary macroparticles and secondary microparticles having different average particle sizes to allow sufficiently high rolling pressure when manufacturing the electrode. The first positive electrode active material in the first positive electrode active material layer interposed between the current collector and the second positive electrode active material layer has the positive electrode active material particles less vulnerable to cracking.

Abstract: A negative electrode composition, a negative electrode for a lithium secondary battery, including the same, a lithium secondary battery including the negative electrode, and a method for preparing a negative electrode composition are disclosed. The negative electrode composition including a silicon-containing active material; a first negative electrode conductive material; and a negative electrode binder. The negative electrode binder has a composite structure wherein the first negative electrode conductive material is bonded to a surface of the negative electrode binder. The bond is a bond formed by a radical polymerization reaction. The negative electrode binder has a modulus of 1×103 MPa or more and 1×104 MPa or less at 25° C. The silicon-containing active material is present in an amount ranging from 60 parts by weight or more based on 100 parts by weight of the negative electrode composition.

Abstract: Provided is an ion conductor composition for improving the ion conductivity of a polymer electrolyte membrane under low humidity/high temperature conditions. The ion conductor composition according to the present disclosure includes 100 parts by weight of an ion conductor and 0.05 to 10 parts by weight of a sugar compound on the basis of 100 parts by weight of the ion conductor.

Abstract: Disclosed are a method and apparatus for detecting mycoplasma using the measurement of a 3-D quantitative phase image. The method of detecting mycoplasma may include generating a three-dimensional (3-D) quantitative phase image of a sample by characterizing the sample by making quantitative a phase shift derived from light that passes through the sample, and determining whether the sample has been infected with mycoplasma by analyzing behavioral characteristics of the generated 3-D quantitative phase image.

Abstract: Provided is an AI-based disaster safety knowledge integration management system enabling AI-driven question-and-answer services for specialized knowledge in the field of disaster safety and supports automatic reporting services for policy planning and report generation on specific topics by utilizing intelligent analysis services for sharing disaster safety data, and which consists of a disaster safety knowledge base integrated with a data network and an artificial intelligence section designed for high-dimensional information processing; the disaster safety knowledge base consisting of a data collection section for gathering and aggregating various information from external agencies; and a data transmission section for transmitting the aggregated information to the server; and big data for analyzing and accumulating the transmitted data, and in the AI section, the accumulated and analyzed data from the big data section being utilized to enable machine intelligence through rapid learning based on human cog

Abstract: A detection device includes a substrate, first electrodes formed on a first surface of the substrate, a responsive layer, and second electrodes formed on a first surface of the responsive layer, each of the second electrodes are capacitively coupled to one of the first electrodes and each second electrode is connected to a power supply to provide driving power.

Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.

Abstract: Embodiments of the present disclosure relates to a display device. According to an embodiment of the disclosure, a display device includes a substrate including a first display region and a second display region surrounding the first display region, a first pixel disposed in the first display region, a second pixel disposed in the second display region, and scan stages which are disposed in the second display region and apply scan signals to the first pixel and the second pixel. The first pixel includes a first pixel driver including a first pixel transistor and a first pixel light-emitting device connected to the first pixel driver. The second pixel includes a second pixel driver including a second pixel transistor and a second pixel light-emitting device connected to the second pixel driver. The second pixel driver is disposed between scan stages adjacent to each other along a first direction.