Abstract: An object of the present invention is to provide a composition, a memory structure suitable for the composition, a manufacturing method, and an operating method for stable operation in a memory element including a chalcogen compound. In order to achieve the object, in a memory array with a cross-point structure including a first electrode line and a second electrode line intersecting each other, and a selective memory element disposed at each intersection of the first electrode line and the second electrode line and being a chalcogen compound, the present invention may provide the memory array with a cross-point structure including the first electrode line formed on a substrate, a first functional electrode formed between the first electrode line and the selective memory element, and a second functional electrode formed between the second electrode line and the selective memory element, wherein the first functional electrode is formed as a line along the first electrode line.

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 flux composition includes an aromatic resin including one benzene ring and one or two hydroxyl (—OH) groups, an activator selected from a group consisting of a dicarboxylic acid and a dicarboxylic anhydride, and a solvent.

Abstract: Provided is an iron-based amorphous alloy and a method of manufacturing the same. More particularly, provided is an high carbon iron-based amorphous alloy expressed by a general formula Fe?C?Si?BxPyCrz, wherein ?, ?, ?, x, y and z are atomic % of iron (Fe), carbon (C), silicon (Si), boron (B), phosphorus (P), and chrome (Cr) respectively, wherein ? is expressed by ?=100?(?+?+x+y+z) atomic %, ? is expressed by 13.5 atomic %???17.8 atomic %, ? is expressed by 0.30 atomic %???1.50 atomic %, x is expressed by 0.1 atomic %?x?4.0 atomic %, y is expressed by 0.8 atomic %?y?7.7 atomic %, and z is expressed by 0.1 atomic %?z?3.0 atomic %.

Abstract: A printed circuit board includes a substrate; and a hole passing through first and second surfaces of the substrate. The hole includes an area in which a width of the hole formed in an inner side of the substrate is formed larger than that of an opening formed on the first surface and/or the second surface.