Abstract: Provided are a method and apparatus for obtaining a triangle in a graph. A computing device receives an adjacency matrix in which two vertices connected to an edge are expressed in rows and columns, divides the adjacency matrix into a plurality of blocks, searches for a search area including a plurality of blocks located at (I,K), (I,J), and (J,K) satisfying I>=J>=K (where I, J, and K are block indexes) for the plurality of blocks existing in the adjacency matrix, and identifies three vertices forming a triangle based on edge information existing in the search area.

Abstract: Provided are a graph data calculation method and apparatus. A computing device divides graph data including a source vertex and a destination vertex of an edge into a plurality of blocks, and identifies an out-degree of each vertex. Next, the computing device repeatedly performs a process of calculating, in units of blocks, a weight of a destination vertex of each edge by using a pagerank and an out-degree of a source vertex of each edge existing in a block, and updating a pagerank of each vertex of the graph data by accumulating a weight of a destination vertex of each block.

Abstract: Provided are a graph data compression method and apparatus. A computing device divides graph data including information about a source vertex and a destination vertex of an edge into a plurality of pieces, generates a plurality of compressed data obtained by compressing the plurality of pieces, and stores the plurality of compressed data as a file. The computing device may generate a plurality of pieces having a size equal to or less than a predefined data size by recursively dividing graph data.

Abstract: The present invention relates to a naphthalimide sulfonate derivative, and a photoacid generator and a photoresist composition each comprising same and, more specifically, to a naphthalimide sulfonate derivative compound, and a photoacid generator and a photoresist composition each comprising same, wherein the compound has excellent absorbance for light of i-line (365 nm) wavelength, is greatly easy to prepare into a polymerizable composition due to very high solubility in an organic solvent, has good thermal stability, and shows a favorable acid generation rate.

Abstract: A screw assembly for a spinal implant comprises a first unit including insertion holes and an inner space, a rod having a side whose outer circumference surface is positioned on the insertion holes of the first unit and another side whose outer circumference surface is positioned on insertion holes of another first unit positioned adjacent to the first unit, a second unit having an upper portion rotatably received in a lower portion of the inner space and a lower portion screwed to a vertebral body, a third unit screwed to an upper portion of the inner space to hold the rod, and a fourth unit positioned between the inner space and the upper portion of the second unit and including a pressure cap seated in the inner space.

Abstract: The present invention relates to a screw assembly for a spinal implant comprising a first unit including insertion holes positioned opposite each other, cut from an edge of an upper end of the first unit, and forming an inner space, the first unit penetrated from top to bottom, a rod having a side whose outer circumference surface is positioned on the insertion holes of the first unit and another side whose outer circumference surface is positioned on an insertion holes of another first unit positioned adjacent to the first unit, a second unit having an upper portion rotatably received in a lower portion of the inner space and a lower portion screwed to a vertebral body of a spine not to be released; a third unit screwed to an upper portion of the inner space to hold the rod, and a fourth unit positioned between the inner space and the upper portion of the second unit to restrict a rotation of the second unit and including a pressure cap seated in the inner space while pressing an outer surface of an upper po

Abstract: An organic light-emitting diode includes an anode on a substrate; a first hole transporting layer on the anode; a second hole transporting layer on the first hole transporting layer and corresponding to the red and green pixel areas; a first emitting material pattern of a first thickness on the second hole transporting layer and corresponding to the red pixel area; a second emitting material pattern of a second thickness on the second hole transporting layer and corresponding to the green pixel area; a third emitting material pattern of a third thickness on the first hole transporting layer and corresponding to the blue pixel area; an electron transporting layer on the first, second and third emitting material patterns; and a cathode on the electron transporting layer, wherein the second thickness is less than the first thickness and greater than the third thickness.