摘要:
This invention provides an optical fiber block that includes an optical-fiber-alignment portion and a stress-reduction-depth portion. In the optical-fiber-alignment portion, a V groove array is arranged to accommodate the non-coated fiber portion of a ribbon fiber. The V groove array is formed by primary and secondary wet-etching processes on a silicon wafer, and further includes first V grooves at both sides and second V grooves different from the first V grooves disposed between the first V grooves. Meanwhile, the stress-reduction-depth portion is formed by another wet etching, extending to a predetermined depth from the optical-fiber-alignment portion, for reducing stress caused by a variation in the coating thickness of the optical fibers.
摘要:
A thermo-optic switch using a small drive power while exhibiting a reduction in the coupling loss caused by the coupling to optical fibers and a switch speed of several hundred microseconds or less. A method for manufacturing the thermo-optic switch and a method for changing an optical line switching using the thermo-optic switch are also disclosed. The thermo-optic switch includes a substrate having etched portions at regions respectively corresponding to input and output terminals of the thermo-optic switch, a lower clad layer formed over the substrate, the lower clad layer having an input taper formed at the region corresponding to the input terminal and adapted to convert a circular mode, input from an optical fiber connected to the input terminal, into an oval mode having a rib shape, and an output taper formed at the region corresponding to the output terminal and adapted to convert the oval mode into a circular mode allowed to be input to an optical fiber connected to the output terminal, a core layer formed over the lower clad layer and provided with branched waveguides having a rib structure, the branched waveguides selectively receiving the oval mode from the input taper and outputting the received oval mode to the output taper, an upper clad layer formed over the core layer, and switching electrodes formed on the upper clad layer and selectively activated to apply heat to an associated one of the branched waveguides in such a fashion that an effective refractive index difference occurs between the branched waveguides, thereby causing the branched waveguides to selectively receive the oval mode from the input taper.
摘要:
Disclosed is an online crane game apparatus. The crane game apparatus includes: a body accommodated therein with prizes; a camera for photographing an inside of the body to generate a game play image; a screen unit provided on at least one surface of the body and having a single color; a communication unit for synthesizing a background video or image to an area corresponding to the screen unit in the game play image to transmit the synthesized background video or image to an outside; and a control unit for controlling the communication unit. Accordingly, the user plays the game while watching the game play image that is more exciting, so that a dynamic and realistic game is implemented.
摘要:
This invention relates to a highly functional graft copolymer and a method of preparing the same, and more particularly, to a highly functional graft copolymer including a main chain of a highly elastic ethylene-based terpolymer including, at a predetermined molar ratio, an ethylene unit, an α-olefin unit having 6 to 12 carbon atoms, and at least one functional unit selected from the group consisting of divinylbenzene and p-methylstyrene, and a side chain of a polar polymer for imparting functionality, and to a method of preparing the highly functional graft copolymer by performing anionic polymerization after catalytic polymerization using a metallocene catalyst.
摘要:
The present invention provides a synchronizer sleeve and a manufacturing method thereof. The synchronizer sleeve is formed by powder metallurgy using a powder mixture having iron as a main ingredient, 0.2 to 0.3 wt % of carbon, 0.5 to 4.0 wt % of nickel, 0.2 to 2.0 wt % of molybdenum and other indispensable impurities.
摘要:
A liquid crystal display (LCD) device adapted to prevent an intrusion of foreign substance and a light leakage phenomenon is disclosed. The LCD device includes a LCD panel; a backlight unit disposed under the LCD panel and configured to applied light to the LCD panel; a top case configured to encompass an upper edge surface of the LCD panel and to be combined with the backlight unit; and a plurality of protective pads arranged on a lower edge surface of the top case and set opposite the upper edge surface of the LCD panel. The protective pads configured to each include first and second side portions which are separated from the second and first side portions of the other adjacent protective pads by a fixed interval and engage with the second and first side portions of the other adjacent protective pads.
摘要:
Disclosed are a slider for a memory device and a hard memory device having the same. The slider for a memory device includes a slider body configured to fly over the surface of a medium at a particular height; and a reverse flow preventing unit disposed at part of the slider body adjacent to a trailing edge of the slider body and configured to prevent a reverse flow of air between the medium and the slider body.
摘要:
Methods and apparatus for decontaminating disposable protective products prepared from polyvinyl alcohol (PVA), used in a nuclear power plant, to less than minimum detectable activity (MDA) are disclosed. In the disclosed methods and apparatus, solid protective products made of PVA, generated from a nuclear power plant, are dissolved into a liquid, and then are decontaminated to less than MDA. The PVA solution decontaminated in this way is concentrated to an appropriate concentration or dried, and finally is subjected to self-disposal. This can fundamentally block the generation amount of combustible waste amounting to 50% or more of low and intermediate level waste of nuclear power plants, thereby considerably contributing to a reduction of the operating expenses of the nuclear power plants. The present invention further relates to methods and apparatus for self-disposing disposable protective products manufactured by conventional polyvinyl alcohol (PVA) through pyrolysis/catalytic oxidation of a PVA solution generated by concentration, and treating the decontaminated PVA solution within a plant. The PVA protective products are dissolved/concentrated/oxidized in water to remove firstly organic matter, and then PVA materials in the PVA solution are completely oxidized into CO2 and H2O by using a small-sized pyrolysis/catalytic oxidation reactor.
摘要翻译:公开了将用于核动力装置的聚乙烯醇(PVA)制备的一次性防护产品去污化至少于最小可检测活性(MDA)的方法和装置。 在所公开的方法和装置中,由核电厂生产的由PVA制成的固体保护产品溶解在液体中,然后净化成小于MDA。 以这种方式去除的PVA溶液被浓缩至适当的浓度或干燥,最后进行自我处理。 这可以从根本上阻止核电厂中低档废物达到50%以上的可燃废物的发电量,从而大大有助于降低核电厂的运行费用。 本发明还涉及通过常规聚乙烯醇(PVA)通过热分解/催化氧化浓缩产生的PVA溶液和处理植物中去污的PVA溶液来自行布置一次性防护产品的方法和装置。 PVA保护产物在水中溶解/浓缩/氧化,首先除去有机物质,然后使用小型热解/催化氧化反应器将PVA溶液中的PVA材料完全氧化成CO 2和H 2 O.
摘要:
Provided are a printed circuit board (PCB) and a semiconductor package including the same. The PCB includes a core layer having a stacked structure including at least a first layer made of a first material that has a first coefficient of thermal expansion (CTE) and a second layer made of a second material that has a second CTE different from the first CTE, an upper wiring layer disposed on a first surface of the core layer, and a lower wiring layer disposed on a second surface of the core layer opposite the first surface.
摘要:
Disclosed are a system for providing a broadcast service and a method for providing a broadcast service. An example of the method for providing a broadcast service includes receiving a broadcast signal including broadcast contents and side information to provide the broadcast contents; reading out at least one of objects from question data that is input regarding the broadcast contents and primarily analyzing the read-out object to read out a subject of the question data; searching a social media site and collecting social media data relating to the subject from the searched social media site; secondarily analyzing the social media data and the side information in the broadcast signal on the basis of the subject; and configuring answer data corresponding to the subject using the analysis result and providing the answer data, and provides information which is extended and varied in real time.