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Byoung-Kwon
Byoung-Kwon Choi, Daejeon KR
| Patent application number | Description | Published |
|---|---|---|
| 20100108204 | ZIRCONIUM ALLOY COMPOSITION FOR NUCLEAR FUEL CLADDING TUBE FORMING PROTECTIVE OXIDE FILM, ZIRCONIUM ALLOY NUCLEAR FUEL CLADDING TUBE MANUFACTURED USING THE COMPOSITION, AND METHOD OF MANUFACTURING THE ZIRCONIUM ALLOY NUCLEAR FUEL CLADDING TUBE - Disclosed herein is a zirconium alloy composition for nuclear fuel cladding tubes, comprising: 1.6˜2.0 wt % of Nb; 0.05˜0.14 wt % of Sn; 0.02˜0.2 wt % of one or more elements selected from the group consisting of Fe, Cr and Cu; 0.09˜0.15 wt % of O; 0.008˜0.012 wt % of Si; and a balance of Zr, a nuclear fuel cladding tube comprising the zirconium alloy composition, and a method of manufacturing the nuclear fuel cladding tube. Since the nuclear fuel cladding tube made of the zirconium alloy composition can maintain excellent corrosion resistance by forming a protective oxide film thereon under the conditions of high-temperature and high-pressure cooling water and water vapor, it can be usefully used as a nuclear fuel cladding tube for light water reactors or heavy water reactors, thus improving the economical efficiency and safety of the use of nuclear fuel. | 05-06-2010 |
| 20100322370 | PROCESS OF MANUFACTURING ZIRCONIUM ALLOY FOR FUEL GUIDE TUBE AND MEASURING TUBE HAVING HIGH STRENGTH AND EXCELLENT CORROSION RESISTANCE - A process of manufacturing zirconium alloy. The process may be used to make a nuclear fuel guide tube and/or a measuring tube which are main components of a nuclear fuel assembly structure. While a nuclear fuel guide tube and a measuring tube are manufactured by performing three-step cold working, and intermediate and final thermal annealing from a semi-finished TREX shell in the conventional method, the present invention relates to zirconium alloy undergoing two-step cold working, and intermediate and final thermal annealing from a TREX shell, resulting in enhanced strength and corrosion resistance. The present invention may be applied to a nuclear fuel guide tube and a measuring tube used for a nuclear fuel assembly in a light water nuclear reactor because, by the shortened process, high percentage reduction in thickness between processes and an decrease in thermal annealing time may sustain high strength and excellent corrosion resistance, and achieve economy of manufacture by reducing the number of processes. | 12-23-2010 |
Byoung-Kwon Lee, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20110064313 | METHOD AND APPARATUS FOR FACE DETERMINATION - Provided are a method and an apparatus for processing digital images, and more particularly, a method and an apparatus for face determination, wherein it is determined if a subject is a true subject based on distance information regarding a distance to the subject and face detection information. In an embodiment, the face detecting apparatus is a digital image processing apparatus and includes a digital signal processor for determining if a subject is a true subject based on distance information regarding a distance to the subject and face length information. | 03-17-2011 |
| 20110097066 | METHOD AND APPARATUS FOR DRIVING LENS BARREL, DIGITAL PHOTOGRAPHING APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM - A method of driving a lens barrel includes detecting a movement detection signal that indicates an operation of the lens barrel which operates using a stepping motor; determining a limit time during which movement of a lens barrel component is detected based on the movement detection signal; detecting the movement from the movement detection signal; and changing a driving level of the stepping motor from a first driving level to a second driving level when movement of the lens barrel component is not detected from the movement detection signal within the limit time, wherein torque of the second driving level is greater than torque of the first driving level. | 04-28-2011 |
Byoung-Kwon Lee, Seongnam-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100225800 | AUTOMATIC FOCUSING METHOD FOR CAMERA PERFORMING ADDITIONAL SCANNING - An automatic focusing method for a camera, including scanning in a macro mode, scanning in a normal mode, and additional scanning. In the scanning in the macro mode, a region within a first distance is scanned if the macro mode is set by a user. In the scanning in the normal mode, a region beyond the first distance is scanned if the normal mode is set by the user. In the additional scanning, the scanning in the normal mode is performed additionally if it is determined that the position of the focus lens found in the scanning in the macro mode does not have the largest focus value, and the scanning in the macro mode is performed additionally if it is determined that the position of the focus lens found in the scanning in the normal mode does not have the largest focus value. | 09-09-2010 |
Byoung-Kwon Lee, Suwon-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100220208 | IMAGE PROCESSING METHOD AND APPARATUS AND DIGITAL PHOTOGRAPHING APPARATUS USING THE SAME - Provided are a digital photographing apparatus and method of performing different degrees of image processing on one or more faces in an image according to the distances of faces from the digital photographing apparatus or whether auto-focusing has been performed on the faces. Also provided are a digital photographing apparatus and method of performing different degrees of image processing which assist in preventing faces at farther distances from appearing more processed, for example, more blurred, than faces at closer distances and which assist in preventing faces that have not been auto-focused from appearing more processed, for example, more blurred, than faces that have been auto-focused. | 09-02-2010 |
Byoung-Kwon Park, Gyeonggi-Do KR
| Patent application number | Description | Published |
|---|---|---|
| 20100054023 | CHARGE STORAGE CIRCUIT, VOLTAGE STABILIZER CIRCUIT, METHOD FOR STORING CHARGE USING THE SAME - A charge storage circuit includes a plurality of word lines, a plurality of bit lines, and a plurality of memory cells connected to a corresponding word line among the word lines and connected to a corresponding bit line among the bit lines. Each of the memory cells includes a transistor turned on in response to a predetermined voltage of the corresponding word line and connected to the corresponding bit line, and a capacitor having one end connected to the transistor and the other end connected to the corresponding word line. | 03-04-2010 |