Yong Bok
Yong Bok An, Ichon-Shi KR
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20130135949 | SEMICONDUCTOR MEMORY APPARATUS, AND SET PROGRAM CONTROL CIRCUIT AND PROGRAM METHOD THEREFOR - A semiconductor memory apparatus includes a program pulse generation block configured to generate a first write control signal, second write control signal and a program completion signal in response to a programming enable signal; a set program control circuit configured to repeatedly generate a set programming enable signal a predetermined number of times in response to an erase command and the program completion signal; and a controller configured to disable the first write control signal in response to the erase command and generate the programming enable signal in response to the set programming enable signal. | 05-30-2013 |
Yong Bok Choi, Gyeonggi-Do KR
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20090035817 | Method for Preparing Transformants Expressing Benzaldehyde Dehydrogenase and Preparation of 2,6-Naphthalene Dicarboxylic Acid Using the Transformants - Disclosed herein are a method for preparing a transformant which carries a gene encoding benzaldehyde dehydrogenase derived from | 02-05-2009 |
Yong Bok Choi, Geumjeong-Dong KR
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20100063318 | Purification Method of Crude Naphthalene Dicarboxylic Acid Using Microorganism and 2,6-Naphthalene Dicarboxylic Acid in Crystalline Form Obtained by Using the Same - Disclosed is a method for purifying a crude naphthalene dicarboxylic acid using microorganism. According to the purification method, a crude naphthalene dicarboxylic acid is purified by reacting a microorganism having the ability to convert 2-formyl-6-naphthoic acid to 2,6-naphthalene dicarboxylic acid with a crude naphthalene dicarboxylic acid, adding an acidic solution to the reaction solution under particular conditions, stirring the mixed solution to crystallize the crude naphthalene dicarboxylic acid, washing the crystallized crude naphthalene dicarboxylic acid, and drying the washed product to obtain 2,6-naphthalene dicarboxylic acid in a pure crystalline form. Advantageously, the purification method enable production of high-purity crystalline 2,6-naphthalene dicarboxylic acid on an industrial scale in an environmentally friendly manner. | 03-11-2010 |
Yong Bok Choi, Gunpo KR
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20090215136 | PSEUDOMONAS SP, HN-72 AND PURIFICATION METHOD OF 2,6-NAPHTHALENE DICARBOXYLIC ACID USING THE SAME - Provided are a novel microorganism and a method for purifying 2,6-naphthalene dicarboxylic acid with high purity using the microorganism. The microorganism is | 08-27-2009 |
Yong Bok Kim, Daejeon-Si KR
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20100168938 | METHOD FOR IMPROVING MANEUVERABILITY AND CONTROLLABILITY BY SIMULTANEOUSLY APPLYING BOTH REACTION WHEEL-BASED ATTITUDE CONTROLLER AND THRUSTER-BASED ATTITUDE CONTROLLER - Provided are an attitude control system and method of a spacecraft of an artificial satellite that may enhance a maneuverability and a controllability by simultaneously applying a reaction wheel and a thruster among drive units used to maneuver an attitude of the spacecraft of the artificial satellite. The attitude control system may include: a thruster-based attitude controller which control firing time of thrusters mounted on the spacecraft; and a reaction wheel-based attitude controller controlling driving of a reaction wheel mounted on the spacecraft. The spacecraft may include a plurality of reaction wheels. When a defect occurs in the spacecraft due to a partial malfunction of the reaction wheels, an attitude maneuverability of the spacecraft may be corrected by simultaneously applying the thruster-based attitude controller and the reaction wheel-based attitude controller. | 07-01-2010 |
Yong Bok Kim, Daejeon KR
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20090159753 | MOMENTUM MANAGEMENT SYSTEM FOR REACTION WHEEL BY USING NULL SPACE VECTOR AND METHOD - A reaction wheel momentum management method using a null space vector is provided. In accordance with this method, when any one of at least four reaction wheels used for triaxial control is made unavailable or degraded, a degraded wheel is used as long as possible for improving the mobility of the behavior of a satellite. The method provides momentum management for an N-number of reaction wheels W | 06-25-2009 |
Yong Bok Lee, Seoul KR
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20080310778 | Air Foil Bearing Having a Porous Foil - There is provided an air foil bearing. The air foil bearing comprises a bearing house and a first foil, wherein a first end of the first foil is fixed with respect to the bearing housing and a second end of the first foil is extended along a peripheral surface of a rotating shaft while maintaining a predetermined clearance with respect to the rotating shaft to thereby become a free end. The air foil bearing also comprises a second foil fabricated from a porous metallic material and extended along the first foil between the first foil and the bearing housing. | 12-18-2008 |
20090008881 | Labyrinth Seal For Adjusting Gap - The present invention relates to a labyrinth seal used for controlling the axial leakage rate of a working fluid by using the rotating shaft of a turbo-machine such as a compressor or turbine The labyrinth seal includes: a seal disk radially extending from a rotating shaft and being formed on the rotating shaft; a seal ring spaced apart from the seal disk and being opposed to the seal disk; an actuator for moving the seal ring to adjust a gap between the seal disk and the seal ring; and a controller for controlling an operation of the actuator. By actively adjusting the gap between the seal disk and the seal ring, it is possible to effectively prevent the working fluid from leaking. | 01-08-2009 |
20090242674 | MOBILE WASTE DISPOSAL SYSTEM - A waste disposal system includes a pulverizing tank where wastes are put into; a pulverizing device for pulverizing the wastes and making them into slurry; one or more heat and dry tanks connected to the pulverizing tank for drying and heating the slurry; a heating device for heating the heat and dry tank; and a vapor discharge device for discharging vapors generated by the heat and dry process of the slurry. The waste disposal system further includes a slurry drain unit for discharging the heated and dried slurry. | 10-01-2009 |
20100247010 | AIRFOIL-MAGNETIC HYBRID BEARING AND A CONTROL SYSTEM THEREOF - The present invention relates to an airfoil-magnetic hybrid bearing, which is a combination of a magnetic bearing and airfoil bearing. An airfoil-magnetic hybrid bearing of the present invention comprises: a housing around a rotating shaft of a rotation device; an airfoil bearing positioned between the housing and the rotating shaft for forming dynamic pressure to levitate the rotating shaft during rotation of the rotating shaft; a magnetic bearing including a plurality of cores positioned radially between inner surface of the housing and outer surface of the airfoil bearing, the cores being projected to the center of the rotating shaft, and coils wound to the cores to levitate the rotating shaft using a magnetic attractive force generated by a current application thereto; and a coupling segment for coupling the airfoil bearing to the magnetic bearing directly. | 09-30-2010 |
20110038717 | OIL-FREE TURBOCHARGER ASSEMBLY - The present invention relates to an oil-free turbocharger assembly using an airfoil bearing that may be useful in high speed conditions. The assembly can be cooled easily. A heat-proof coating can also be easily applied to the turbo charger's rotating shaft. In one embodiment, an oil-free turbocharger assembly has a constant distance between a journal portion and a rotating shaft so that the mass of the rotating body can be minimized and the rotating body assembly can have a small moment of inertia. The turbocharger in some embodiments of the invention may be cooled by a refrigerant which improves cooling efficiency. Each part of the rotating body assembly in some embodiments may be individually treated with a heat-proof process so that productivity can be improved. | 02-17-2011 |
20140376850 | CAGE FOR ROLLING BEARING - A cage for a rolling bearing is coupled to a rolling bearing including an inner ring, an outer ring and a plurality of rolling elements rolling between the inner ring and the outer ring to keep intervals of the plurality of rolling elements, wherein the plurality of rolling elements include bodies coupled along a circumference thereof at predetermined intervals, wherein each of the bodies includes a first piece and a second piece which are attachable to each other and detachable from each other. A first coupler and a second coupler configured to be capable of being coupled to each other are respectively formed at the first piece and the second piece, and the first piece and the second piece are primarily coupled by means of a coupling force of the first coupler and the second coupler. | 12-25-2014 |
Yong Bok Lee, Yongin-Si KR
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20090168743 | GSM MOBILE TERMINAL AND NOISE SUPPRESSION METHOD FOR THE SAME - A TDMA mobile terminal and noise suppression method for the same are provided. The mobile terminal includes a storage unit for storing a gain control table. The gain control table contains gain control values used for controlling gains of at least one of an outgoing audio signal and an incoming audio signal in order to suppress frequency dependent noise in the at least one signal. The mobile terminal also includes an audio processing unit for processing an audio signal by amplifying the audio signal according to applied gain control values. The mobile terminal further includes a control unit for measuring, during call processing, at least one of a transmit power level and a receive power level, determining corresponding gain control values from the gain control table, and applying the determined gain control values to the audio processing unit. | 07-02-2009 |
Yong Bok Lee, Osan KR
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20120133623 | ELECTRONIC SHELF LABEL APPARATUS FOR SWITCHING IMAGES AND METHOD THEREOF - There is provided an electronic shelf label including an image display unit displaying a first image; a sensor unit detecting image switching signals; and a processor unit determining whether the image switching signals detected by the sensor unit are valid and switching the first image displayed on the image display unit to a second image when the image switching signals are valid, and a communication unit receiving a plurality of image data displayed on the image display unit. The processor unit determines that the image switching signals are valid when a detection duration time of the image switching signals is longer than a predetermined first threshold time. By this configuration, the electronic shelf label can switch a plurality of images and reduce the influence of disturbance to thereby prevent unnecessary image switching. Further, the electronic shelf label can provide product-related information for a manager or the like as well as for a purchaser. | 05-31-2012 |
Yong Bok Park, Ansan-Si KR
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20150116178 | COMBINED RADIO FREQUENCY IDENTIFICATION (RFID) AND WIRELESS CHARGING ELECTROMAGNETIC WAVE ABSORBER, COMBINED RFID AND WIRELESS CHARGING WIRELESS ANTENNA INCLUDING SAME, AND METHOD FOR MANUFACTURING SAME - A combined RFID and wireless charging electromagnetic wave absorber, a combined RFID and wireless charging wireless antenna including same, and a method for manufacturing same. The electromagnetic wave absorber not only performs separate functions of RFID and wireless charging and provides stable operating characteristics, but also has a structure in which an electromagnetic wave absorber and a wireless antenna are integrally coupled so as to maximize the respective performance thereof. Despite a structure in which the two functions of RFID and wireless charging are combined, the thickness of the antenna can be reduced, such that it can be very useful when adopted in and applied to a mobile device, thereby contributing greatly to reducing the thickness of a smartphone. | 04-30-2015 |