Abstract: An apparatus for storing a key value store file according to an embodiment includes a memory configured to record one or more key values in a predefined unit space based on a data input request from an outside, a controller configured to store data received from the memory in a storage, and the storage configured to include a plurality of zones. The controller is configured to perform a flush operation of storing one or more key values received from the memory as a file in a predefined format in the storage and a compaction operation of merging a plurality of files existing in one level in the storage and recording the merged files as one file in another level.

Abstract: An apparatus for storing a key value store file according to an embodiment includes a memory configured to record one or more key values in a predefined unit space based on a data input request from an outside, a controller configured to store data received from the memory in a storage, and the storage configured to include a plurality of zones. The controller is configured to perform a flush operation of storing one or more key values received from the memory as a file in a predefined format in the storage and a compaction operation of merging a plurality of files existing in one level in the storage and recording the merged files as one file in another level.

Abstract: Proton-conducting hybrid glass and a method for manufacturing the same. The proton-conducting hybrid glass has CsPWA created inside the pores of borosilicate glass. The proton-conducting hybrid glass can be used as an electrolyte for electrochemical devices, such as fuel cells and sensors. When the proton-conducting hybrid glass is used as an electrolyte membrane for a fuel cell, excellent thermal and chemical stability is realized in the range from a high temperature to an intermediate temperature of 120° C. A high proton conductivity of 10?3S/cm or higher and good catalytic activity are realized. In addition, high volumetric stability and excellent moisture retention characteristics in high and intermediate temperature ranges are achieved.

Abstract: A shadow mask in a color cathode ray tube, is disclosed, formed with invar alloy thin plate with a texture which allows formation of uniform sized electron beam pass-through holes, with excellent roundness and a small etching deviation in etching, including a ratio aR of a diffraction intensity R{100} of {100} crystal planes to a diffraction intensity R{110} of {110} crystal planes being greater than unity, and a ratio gR of a sum of a diffraction intensity R{100} of {100} crystal planes and a diffraction intensity R{111} of {111} crystal planes to a diffraction intensity R{110} of {110} crystal planes being in a range 2˜20, obtained from the diffraction intensity R{111} of {111} crystal planes, the diffraction intensity R{200} of {200} crystal planes, the diffraction intensity R{220} of {220} crystal planes, and the diffraction intensity R{

Abstract: In a color cathode ray tube, a shadow mask has a shadow mask thin plate that includes Fe—Ni. The shadow mask thin plate has a volume ratio, FR of &ggr;-FIBER to a crystal face having {100}<001> cube orientation between 0.5 and 5.0.

Abstract: A shadow mask in a color CRT, of an Fe—Ni series invar alloy of which alloy composition, crystal grain size, and concentration of {100} crystal planes are adjusted so as to have an excellent etchability and formability, for forming uniform electron beam pass-through holes with a less etching deviation and better roundness by etching; and method for fabricating the same, the shadow mask consisting essentially of 35˜38% Ni, 0.1˜1.0% Mn, 0.05˜0.5% Cr, 0.05˜0.01% B, below 0.02% C, 0.001˜8.0% Co, 0.001˜0.01% N, below 0.008% O, below 0.

Abstract: Provided with a shadow mask which is designed to suppress the doming effect by providing a shadow mask plate material for a color CRT having an ideal texture suitable for an etching to form the uniform profile of holes for the electron beams to pass through and thereby to prevent the etching deviation, the shadow mask plate material consisting of as main component Fe--Ni alloy, thus the shadow mask being characterized by the volume ratio of crystals with CUBE orientation being 2 to 20 times as high as that of crystals with (.beta.)-Fiber in the shadow mask plate material for the enhancement of etching property; and the method of manufacturing the shadow mask including the steps of hot-rolling and cold-rolling, thermal-refining and heat-treating the shadow mask raw material to obtain a shadow mask thin plate having the volume ratio of crystals with CUBE orientation being 2 to 20 times as high as that of crystals with (.beta.)-Fiber; and etching, forming and blackening the resulting shadow mask thin plate.