Abstract: A semiconductor light emitting device has a first conductive semiconductor layer, an active layer on the first conductive semiconductor layer and a second conductive semiconductor layer on the active layer. An oxide layer is disposed around the first semiconductor layer and is provided between the substrate and active layer. The first semiconductor layer has an uneven pattern along the side edge.

Abstract: There is provided a chemical vapor deposition apparatus, including: a reaction chamber including a support part having a wafer placed thereon and a gas supply part supplying a process gas to a reactive space formed above the support part to allow a thin film to be grown on a surface of the wafer; a heat exchanger changing a temperature of the process gas, supplied to the reactive space through the gas supply part, to allow the process gas to be maintained at a set temperature: and a controller regulating a flow rate of the process gas, and detecting a temperature difference between a temperature of the process gas and the set temperature to thereby control the heat exchanger to supply the process gas to the reactive space while the process gas is maintained at a reference temperature set according to each stage.

Abstract: An apparatus for charging an emergency battery, which provides an emergency power to an emergency core cooling apparatus including an electric pump or a steam pump includes a thermoelectric generation device configured to detect a decay heat and a residual heat produced in a nuclear power plant and configured to convert the detected heat to an electric energy; an electric energy conversion unit connected to the thermoelectric generation device to output a current generated in the thermoelectric generation device as a constant voltage; and the emergency battery configured to store a power outputted from the electric energy conversion unit.

Abstract: Disclosed is a semiconductor light emitting device. The semiconductor light emitting device comprises a substrate; a light emitting structure comprising a first conductive semiconductor layer, an active layer and a second conductive semiconductor layer on the substrate; an electrode layer on the second conductive semiconductor layer; and an electrode on the electrode layer, wherein the substrate comprises a plurality of convex portions, wherein the electrode layer comprises a plurality of holes corresponding to a region of at least one of the plurality of convex portions of the substrate, wherein an insulating material is disposed in the plurality of holes on the light emitting structure.

Abstract: Disclosed is a semiconductor light emitting device. The semiconductor light emitting device comprises a first conductive semiconductor layer, an active layer on the first conductive semiconductor layer, and a second conductive semiconductor layer comprising a plurality of recesses on the active layer.

Abstract: Disclosed is a method for preparation of a liquid crystal film having uniaxial alignment, comprising steps of: elevating temperature of a substrate coated with a nanostructure formed of liquid crystal molecules to a value sufficient to alter the nanostructure into a liquid phase; and decreasing the temperature to another value sufficient to again alter the liquid phase into a liquid crystal phase in the presence of a magnetic field to horizontally align the nanostructure of liquid crystal molecules.

Abstract: Disclosed is a semiconductor light emitting device. The semiconductor light emitting device comprises a first conductive semiconductor layer, an active layer on the first conductive semiconductor layer, and a second conductive semiconductor layer comprising a plurality of recesses on the active layer.

Abstract: A semiconductor light emitting device and a method of fabricating thereof are provided. The semiconductor light emitting device comprises: a first conductive semiconductor layer having an uneven pattern side; an active layer on the first conductive semiconductor layer; and a second conductive semiconductor layer on the active layer.

Abstract: Disclosed are a process for preparing single wall carbon nanotubes with surfactant-coated surface which comprises coating a surface of the carbon nanotubes with a surfactant by adding water to a mixture of the carbon nanotubes and the surfactant, ultrasonically treating the mixture, treating the ultrasonically treated mixture with a initiator, and applying a surfactant to the surface of the resultant carbon nanotubes and, in addition, the carbon nanotubes with surfactant-coated surface prepared by the above process. The formed carbon nanotubes of the present invention can maintain a stable dispersion condition regardless of change of an external environment and be stably dispersed in water even when putting the carbon nanotubes into the water after completely drying the same, so that the carbon nanotubes can be widely used in developing and manufacturing various products.

Abstract: Disclosed is a method for preparation of a liquid crystal film having uniaxial alignment, comprising steps of: elevating temperature of a substrate coated with a nanostructure formed of liquid crystal molecules to a value sufficient to alter the nanostructure into a liquid phase; and decreasing the temperature to another value sufficient to again alter the liquid phase into a liquid crystal phase in the presence of a magnetic field to horizontally align the nanostructure of liquid crystal molecules.

Abstract: An improved waterproofing system for the concrete slab of a flat roof on a building is disclosed. The waterproofing system uses hollow plastic panels of designed size, different thickness, and groove and tongue joints for interconnecting the panels. A supplementary waterproofing layer may be installed using sheet membrane materials such as asphalt sheet, metal sheet and other sheets on vertical surfaces, especially the parapet of the roof. The invention further concerns a construction method for applying a fiber mesh reinforcement on the connection joint and for applying fluid-applied materials on the substrate with sheet membrane layers on vertical surfaces. The waterproofing layer of sloped step type, hollow plastic panels of different thickness, permits fast drainage of stagnant water, which inhibits weather damage to the waterproofing layer.

Abstract: An improved waterproofing system for concrete slab of a flat roof on a building is disclosed. The invention concerns a construction method for installing on the concrete substrate a waterproofing layer comprising hollow plastic panels of designed size, different thickness, and the groove and the tongue joint, and installing a supplementary waterproofing layer using sheet membrane materials such as asphalt sheet, metal sheet and other sheets on the vertical surface, especially the parapet of roof. The invention further concerns a construction method for applying fluid-applied materials after reinforcement with fiber mesh on their joint line to connect plastic panels on substrate with sheet membrane layer on the vertical surface. The waterproofing layer of sloped step type, hollow plastic panels of different thickness permits fast drainage of stagnant water, which inhibits weather damage to the waterproofing layer.

Abstract: An image display system (10) includes an image buffer (20,22) having a plurality of addressable locations for storing image pixel data. The system further includes circuitry (24,34,36) coupled to an output of the image buffer for converting image pixel data read therefrom to electrical signals for driving an image display (18). The circuitry is responsive to signals generated by an image display controller (16) for generating one of a plurality of different timing formats for the electrical signals for driving an image display having a specified display resolution. The apparatus further includes circuitry (40,42) for configuring the image buffer in accordance with the specified display resolution. The image buffer is configurable, by example, as two, 2048 location by 1024 location by 24-bit buffers and one 2048 location by 1024 location by 16-bit buffer; or as two, 2048 location by 2048 location by 24-bit buffers and one 2048 location by 2048 location by 16-bit buffer.

Abstract: A practice golf club aids golf players in improving their stroke by indicating whether or not their swing generates an adequate amount of club head speed. This is achieved by utilizing the centrifugal force generated by a golf swing to actuate a piston located at the head of the golf club. If sufficient club head speed is attained and the piston is displaced a certain amount, a lamp momentarily blinks and an audible "click" can be heard to notify the user that the swing was indeed adequate. The components of the club include a piston, holding ball bearings, a return spring and an electrical circuit which contains a lamp and a ball bearing which is contacted by the piston when the piston is displaced by centrifugal force. The piston produces a second "click" when it is returned and strikes an upper piston chamber wall.

Abstract: A video pixel presentation rate expansion circuit is provided for use with a high-resolution display system. The overall display system includes a high-resolution monitor, a computer for providing control signals, including a high-resolution frame buffer for storing computer graphics and TV video images and reading out said video data at a rate controlled by said control signals and providing said data with a high-resolution monitor for display. The expansion circuit of the present invention comprises means responsive to an expansion pattern generated by the computer for changing the time base of the video pixel data read out of said frame buffer. Circuit includes means responsive to said expansion pattern for selectively repeating predetermined scan lines of said video display and for selectively repeating certain pixel along a given scan line to match the time base of the video data read out of said frame buffer to the time base of said high-resolution monitor.