Abstract: Disclosed is a highly anticorrosive martensitic stainless steel having uniformly distributed fine chromium carbide so as to have improved corrosion resistance and being applicable as tableware with suitable hardness when strengthened by heat treatment, and a manufacturing metho therefor. The highly anticorrosive martensitic stainless steel according to an embodiment of the present disclosure includes, in percent by weight (wt%), 0.14 to 0.21% of C, 0.05 to 0.11% of N, 0.1 to 0.6% of Si, 0.4 to 1.2% of Mn, 14.0 to 17.0% of Cr, 0.2 to 0.32% of C+N, and the balance of Fe and inevitable impurities, has a PREN value, represented by Formula (1), of 16 or more, and has a precipitation temperature of chromium carbide of 950° C. or lower.

Abstract: An austenitic stainless steel having excellent orange peel resistance and a method for producing the same are disclosed. In the austenitic stainless steel having excellent orange peel resistance, according to an embodiment of the present disclosure, a ratio Gs/Gi of an average crystal grain size Gs of surface crystal grains included in a first area corresponding to a depth of 10% or less of a total thickness of the austenitic stainless steel from the surface of the austenitic stainless steel with respect to an average crystal grain size Gi of internal crystal grains included in a second area corresponding to a depth that is deeper than 10% of the total thickness of the austenitic stainless steel from the surface of the austenitic stainless steel may be 0.5 or smaller.

Abstract: Disclosed is an austenitic stainless steel pipe having excellent wrinkle resistance. The austenitic stainless steel pipe includes, based on % by weight, silicon (Si): 0.1 to 0.65%, manganese (Mn): 0.2 to 3.0%, nickel (Ni): 6.5 to 12.0%, chromium (Cr): 14.5 to 20.5%, copper (Cu): 6.0% or less (excluding 0), the sum of carbon (C) and nitrogen (N): 0.13% or less (excluding 0), and the remainder being Fe and unavoidable impurities, wherein the austenitic stainless steel pipe satisfies Equation (1) below concerning an outer diameter (D) and a thickness (t) thereof and has a yield strength of 195 MPa or less: D/t?20 ??Equation (1).

Abstract: The present invention relates to a duplex stainless steel, and to a duplex stainless steel having excellent corrosion resistance and a method of manufacturing the same.

Abstract: A method for surface treatment of a roll, in which a laser is emitted on a roll surface to fabricate a pattern, includes a section allocation operation in which the roll surface is divided into multiple sections, and a pattern fabrication operation in which the roll is rotated in a circumferential direction, and a random pattern is fabricated on each of the fabrication sections, and an apparatus includes an apparatus frame, a fixing unit which is installed on the apparatus frame, supports a roll, and rotates in a circumferential direction of the roll, a laser unit which is installed on the apparatus frame, and emits a laser to the roll so that a pattern received may be formed on the roll surface through etching, and a displacement unit which is installed on the apparatus frame, and moves the laser unit along a lengthwise direction of the roll.

Abstract: The present invention relates to a theater having provided with a screen having curvature, and a chair control system for same and, more specifically, to a theater comprising: a screen having predetermined curvature in the long axial direction or the short axial direction; and theater chairs provided so as to face the center of the screen, wherein the screen is tilted. Therefore, by providing the angles of theater chairs to vary with respect to the location in a theater having provided with a screen that has curvature in the horizontal axis as well as the vertical axis, the present invention enables securing of an optimal field of vision for audience.

Abstract: The present invention relates to a curved ceiling structure, the ceiling structure characterized by having a curved shell shape over the seats of a theater while exposing the screen. Therefore, according to the present invention, structural continuity with the screen curved in horizontal and vertical axes can be ensured, and by ensuring design integrity with the screen curved in horizontal and vertical axes, a sense of immersion can be imparted to an audience and an enhanced life-like sensation can be delivered thereto.

Abstract: The present invention relates to a method of providing image data based on cloud streaming. In particular, the method uses memory space of a terminal, prestores image data in the terminal, captures an execution screen regarding execution of a specific application, extracts video content from the prestored image data based on the captured execution screen and information regarding the execution screen, simultaneously encodes individual items of the extracted video content, and provides the encoded video content to a screen. Thus, according to the present invention, usage of the cloud streaming server and the network may be reduced by an amount commensurate with the resources utilization of the terminal. Network load may also be reduced when a live video or a VOD video is not being watched, and the rich GUI experience may be guaranteed in a standby state.

Abstract: The present invention relates to a variable screen system for providing audience with more enhanced immersion by having a content image projected on a screen that is in the shape of a curved surface. More particularly, the present invention relates to a variable screen system comprising: a support for fixing a frame on which a screen is formed; and a theater server for controlling the support and thereby changing the curvatures of the frame or the screen formed on the frame.

Abstract: The present invention relates to a curved screen support comprising a plurality of vertical bars arranged vertically from the ground, and a plurality of horizontal bars attached to the vertical bars at one end in the horizontal direction with respect to the ground, wherein horizontal bars are characterized in that the line connecting the other ends of the horizontal bars arranged on the same vertical axis has a curved shape of a set curvature, and the line connecting the other ends of the horizontal bars arranged on the same horizontal axis has a curved shape of set curvature. Therefore, according to the present invention, a curved screen having a curvature along the horizontal axis as well as the vertical axis can be stably held, and by controlling the curvature and angle of the curved screen, enhanced life-like effects can be provided to an audience.

Abstract: The present invention relates to a screen, and more specifically to a screen, to which a content images are projected, comprising screen regions each having a mutually different reflectance. According to the present invention, with respect to implementing a screen having a non-flat surface, as the content images can be projected onto all screen regions while maintaining uniform brightness, an audience can be provided with a content viewing environment by means of screens having a variety of shapes, while satisfactorily maintaining the quality of the of the projected a content images.

Abstract: The present invention relates to a screen-holding structure, and more specifically to a screen-holding structure to withstand the weight of the screen by means of a screen holding apparatus for the entire region or a part of the screen to prevent the phenomenon in which a screen held by a frame sags downward due to the weight of the screen. According to the present invention, the curved surface of the screen can be smoothly maintained by minimizing the downward sagging phenomena of the curved screen, thereby allowing content image to be projected onto the screen without distortion, and consequently allowing a viewing environment having a high sense of immersion and enhanced stereoscopic effect to be provided to an audience.

Abstract: A method of manufacturing a martensitic stainless steel sheet by allowing ingot steel to pass through two casting rolls rotating in opposing directions through a twin roll strip caster is provided. The method includes rolling a steel sheet cast between the casting rolls at a temperature of 1000 to 1200° C. and a draft percentage of 25 to 50% with a first roller, and rolling the steel sheet at a temperature of 800 to 1000° C. and a draft percentage of 5 to 15% with a second roller.

Abstract: There are provided a casting roll of a twin-roll strip caster and a method for manufacturing a high-nitrogen duplex stainless steel strip having no dimple. The casting roll has an average roughness Ra of 10 ?m to 30 ?m, and diagonal fine grooves having a width of 50 ?m to 500 ?m, an interval of 100 ?m to 1000 ?m, and a depth of 50 ?m to 200 ?m are formed in the casting roll. The diagonal fine grooves are symmetrically intersecting each other at an angle of 30° to 70° with respect to circumferential direction of the casting roll.

Abstract: A method for surface treatment of a roll, in which a laser is emitted on a roll surface to fabricate a pattern, includes a section allocation operation in which the roll surface is divided into multiple sections, and a pattern fabrication operation in which the roll is rotated in a circumferential direction, and a random pattern is fabricated on each of the fabrication sections, and an apparatus includes an apparatus frame, a fixing unit which is installed on the apparatus frame, supports a roll, and rotates in a circumferential direction of the roll, a laser unit which is installed on the apparatus frame, and emits a laser to the roll so that a pattern received may be formed on the roll surface through etching, and a displacement unit which is installed on the apparatus frame, and moves the laser unit along a lengthwise direction of the roll.

Abstract: There is provided a method of manufacturing a titanium (Ti)-containing austenitic stainless steel sheet having a high degree of surface quality by using a twin roll strip caster. The method includes controlling a composition of molten steel such that a TiN precipitation temperature may be higher than a temperature of the molten steel in a tundish (T/D) by at least 50° C. (?T?50° C.), the TiN precipitation temperature being defined by the following formula 2: Log(N%)=?19,755/(T+273)+7.78+0.07[% Ti]?log [% Ti]+ 0.045[% Cr] T(° C.)=?19,755/log(N%)?7.78?0.07(%Ti)+log(%ti)?0.