Choi, Daejon
Chang-Auck Choi, Daejon KR
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20080286153 | Affinity Chromatography Microdevice and Method for Manufacturing the Same - An affinity chromatography microdevice includes a top board and a bottom board. The top board includes an inlet and an outlet through which microfluid flows, and a reaction chamber for limiting the flow of the microfluid for reaction. The bottom board includes a microelectrode for independently controlling a micro-temperature, and a thermosensitive polymer matrix formed on the microelectrode. The thermosensitive polymer matrix is contracted or expanded according to temperature change. | 11-20-2008 |
Chel-Jong Choi, Daejon KR
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20110068326 | SCHOTTKY BARRIER TUNNEL TRANSISTOR AND METHOD FOR FABRICATING THE SAME - A Schottky barrier tunnel transistor includes a gate electrode, and source and drain regions. The gate electrode is formed over a channel region of a substrate to form a Schottky junction with the substrate. The source and drain regions are formed in the substrate exposed on both sides of the gate electrode. | 03-24-2011 |
20130075804 | HIGH DENSITY SEMICONDUCTOR MEMORY DEVICE AND METHOD FOR MANUFACTURING THE SAME - Provided are a high density semiconductor memory device capable of precisely reading data by suppressing the occurrence of a leakage current due to the high-integration of the semiconductor memory device, and a method for manufacturing the semiconductor memory device. The high density semiconductor memory device includes: source and drain electrodes disposed over a substrate, and forming a Schottky junction with a channel region; and a floating gate disposed over the substrate of the channel region, and configured with a plurality of nanodots. The nanodots may be formed of a silicon compound or any material that can be charged. | 03-28-2013 |
Cheo Ho Choi, Daejon KR
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20110288675 | MACHINE AND METHOD FOR GRINDING SPACER GRID OF NUCLEAR FUEL ASSEMBLY - A machine and a method for grinding a spacer grid of a nuclear fuel assembly. The machine includes a spacer grid holding unit, a first rectangular coordinates robot for grinding an outer surface of the spacer grid, a second rectangular coordinates robot for grinding a corner of the spacer grid, and a control unit. The spacer grid holding unit includes a holding jig onto which the spacer grid is seated and held, and a rotary index table which is coupled to the holding jig to rotate the holding jig. The first and second rectangular coordinates robots are provided at predetermined positions adjacent to the spacer grid holding unit. The control unit controls the spacer grid holding unit, the first and second rectangular coordinates robots and all programs required to conduct the operation for grinding the spacer grid. | 11-24-2011 |
Euna Choi, Daejon KR
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20100262888 | DECODING APPARATUS AND METHOD BASED ON VARIABLE ERROR CORRECTION VALUE - Provided is a decoding apparatus and method based on a variable error correction value. The decoding method includes setting an initial normalized factor and a normalized factor correction value, initially updating a check node based on the initial normalized factor, and updating the check node based on a variable error correction value acquired by adding the initial normalized factor and the normalized factor correction value. | 10-14-2010 |
20110200149 | PREPROCESSING APPARATUS AND METHOD FOR GROUP-BASED DECODING - Provided are a preprocessing apparatus and a method thereof for group-based decoding. The preprocessing apparatus includes a log likelihood ratio (LLR) calculator for calculating LLRs of received signals, a signal sorter for sorting the received signals based on the calculated LLRs; and a grouping unit for grouping the sorted signals. | 08-18-2011 |
20110235701 | SCALABLE VIDEO BROADCASTING APPARATUS AND METHOD OVER MULTIBAND SATELLITE CHANNEL - Provided is an apparatus and method for transmitting/receiving multiband broadcasting using scalable video coding, which can solve a limitation of a transmission band in a multichannel satellite broadcasting service and increase availability of a satellite broadcasting service by scalably encoding video data and transmitting the data using a different transmission band for each layer. The apparatus for transmitting multiband broadcasting using scalable video coding includes: a scalable video encoder for scalably encoding video data to generate a scalable video stream having multiple layers; a multiplexer for multiplexing the scalable video elementary stream having multiple layers, a compressed audio elementary stream, and program specification information to generate a transport stream (TS); and a multiband transmitter for separating packets of the TS into multiple TSs according to pre-given priority information and transmitting the packet streams using a different transmission band. | 09-29-2011 |
Eun-Chang Choi, Daejon KR
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20100003929 | WIRELESS AUDIO TRANSCEIVER SYSTEM AND METHOD USING UWB WIRELESS COMMUNICATION - There is provided a transceiving method of an audio signal using an UWB wireless communication scheme, including the steps of: extracting and analyzing the beacon frames to generate reserved transmission interval information previously reserved by the other UWB transmitters and/or adjacent wireless audio transmitters and information on audio source and channel; calculating an available transmission interval for each channel of audio sources by using the information on the audio source and channel of the other UWB transmitters; generating and transmitting a beacon frame based on the reserved transmission interval and the audio source and channel information; transmitting the audio signal at the reserved transmission interval by audio source and channel units; extracting and analyzing the beacon frame to generate audio source and channel information and reserved transmission interval information; and providing the audio source and channel information to the user. | 01-07-2010 |
Hae-Ock Choi, Daejon KR
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20080280626 | Method for Providing Location-Based Service Using Location Token - Provided is a method for providing a location-based service using a location token. The method includes the steps of: a) receiving an encrypted token message including constraints for location information access from a terminal; b) decoding and storing the transmitted token message in a token database; c) creating a location token accessible to the transmitted token message and transmitting the location token to the terminal; d) extracting a token message number in the location token transmitted from a location-based service server, checking constraints of a user and updating an exception list; and e) acquiring location information of the terminal and transmitting the location information to the location-based service server. | 11-13-2008 |
Ii Hwan Choi, Daejon KR
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20120118044 | METHOD AND SYSTEM FOR MANAGING A POLLUTION-PREVENTION FACILITY - There are disclosed a method for managing a pollution prevention facility and a system for effectively managing the pollution prevention facility which can exhaust pollutants, and a system thereof. A method for managing a pollution prevention facility includes a first measuring step of measuring pollutants before a pollution prevention facility treats a pollutant outlet; a second measuring step of measuring the amount of pollutants after the pollution prevention facility treats the pollutant outlet; and a managing step of managing an exchange period of a filling material provided in the pollution prevention facility. | 05-17-2012 |
Jae-Ick Choi, Daejon KR
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20090027279 | Method for reducing electromagnetic field of terminal and terminal having structure for reducing electromagnetic field - A method of reducing electromagnetic field using metamaterial and a portable or wearable terminal having a structure for reducing an electromagnetic field using a metamaterial are provided. The method includes deciding a body contacting part of the portable or wearable terminal; and disposing an electromagnetic field reducing unit formed of metamaterial between an antenna and the decided body contacting part, wherein the metamaterial including a conductor and a dielectric adjusts a permittivity. | 01-29-2009 |
20090153275 | TUNABLE MAGNETIC FIELD AMPLIFYING DEVICE - Provided is a tunable magnetic field amplifying device capable of easily adjusting resonance frequencies and tuning usable bands by using discrete elements to vary electric properties of elements that are used for amplifying a magnetic field of a specific microwave band. The tunable magnetic field amplifying device includes a Swiss roll formed by winding a metal sheet coated with a dielectric in a spiral cylinder shape once or several times; and a tunable capacitor connected between an inner sheet of and an outer sheet of the metal sheet for tuning a resonance frequency. | 06-18-2009 |
Jae Soon Choi, Daejon KR
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20120008729 | LID FRAME FOR NUCLEAR FUEL ASSEMBLY SHIPPING CONTAINER AND SHIPPING CONTAINER FOR NUCLEAR FUEL ASSEMBLIES - A lid frame for a nuclear fuel assembly shipping container and a shipping container for nuclear fuel assemblies are provided. The shipping container can include a lower container in which a cradle is installed, an upper container detachably coupled to the lower container, and a base frame coupled to the cradle with at least one nuclear fuel assembly placed thereon. The lid frame can include a plurality of supports installed apart from each other so as to surround the nuclear fuel assembly placed on the base frame, and a plurality of clamps separated from each other, coupled to the plurality of supports perpendicular to the plurality of supports, rotatably hinged to the base frame, and configured to clamp the nuclear fuel assembly. The lid frame safely protects the nuclear fuel assembly that is being transported. | 01-12-2012 |
20120008730 | LID FRAME FOR NUCLEAR FUEL ASSEMBLY SHIPPING CONTAINER AND SHIPPING CONTAINER FOR NUCLEAR FUEL ASSEMBLIES - A lid frame for a nuclear fuel assembly shipping container and a shipping container for nuclear fuel assemblies are provided. The shipping container includes a lower container having a cradle, an upper container detachably coupled to the lower container, and a base frame coupled to the cradle with at least one nuclear fuel assembly placed thereon. The lid frame includes a plurality of supports installed apart from each other so as to surround the nuclear fuel assembly placed on the base frame, a plurality of clamps separated from each other, coupled to the supports so as to be perpendicular to the supports, rotatably hinged to the base frame, and clamping the nuclear fuel assembly, and a plurality of gap compensators coupled to inner surfaces of the supports in order to compensate for a gap between the inner surfaces of the supports and the nuclear fuel assembly. | 01-12-2012 |
Jee-Yon Choi, Daejon KR
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20090135942 | APPARATUS AND METHOD FOR TRANSMITTING DATA USING MULTI-ANTENNA - Provided are an apparatus and method for transmitting data using a multi-antenna. The apparatus includes a transmission buffer selecting unit for selecting transmission buffer of an antenna group corresponding to characteristics of each aggregated Medium access control Protocol Data Units (MPDU) when a list of aggregated MPDUs to transmit is received; a data transmitting unit for generating a list of aggregated MPDUs to transmit with storage information of the aggregated MPDUs, transferring the generated list to the transmission buffer selecting unit and transmitting corresponding aggregated MPDUs through the selected transmission buffer; and a timing controlling unit for controlling a transmission timing of each aggregated MPDU. | 05-28-2009 |
20090141679 | METHOD FOR FORMING FRAME IN WIDEBAND WIRELESS COMMUNICATION SYSTEM USING MULTI-ANTENNA - A method for forming a frame in a wireless communication system is provided. In the method, a plurality of preamble symbols are disposed. Then, a signal symbol is disposed at a predetermined position among the plurality of preamble symbols. At least one of data symbols is disposed after the plurality of preamble symbols. | 06-04-2009 |
20090154382 | MEDIUM ACCESS CONTROL DEVICE FOR PROCESSING DATA AT HIGH SPEED AND METHOD THEREOF - Provide are a medium access control MAC device for processing data at a high speed and a method thereof. The MAC device includes a packet receiving and processing unit for receiving packet data transmitted from a physical layer device and extracting data and data information from the received packet data by processing the received packet data; a data multiprocessing unit for sequentially multiplexing the extracted data and storing the extracted data in a first memory; and a data arranging unit for arranging the stored data in sequence number order using addresses of the first memory and the extracted data information, and transmitting the arranged data to an upper layer interface. | 06-18-2009 |
20090154405 | MEDIUM ACCESS CONTROL METHOD AND DATA TRANSMISSION METHOD USING THE SAME IN WIRELESS LOCAL AREA NETWORK - Provided are a MAC method and a method for transmitting data using the same in a WLAN. The MAC method includes: transmitting a bandwidth scheduling report frame for informing information on downlinks and uplinks allocated to a terminal by including the bandwidth scheduling report frame in one of the downlinks where the bandwidth scheduling report frame includes a plurality of downlinks, a plurality of uplinks, and a plurality of short uplinks and the number of the plurality of downlinks is equal to the number of the plurality of uplinks; receiving a bandwidth request frame for requesting bandwidth allocation through one of the uplinks; and allocating a bandwidth to each of the terminals by an unit of the downlink and the uplink. | 06-18-2009 |
Ji-Hoon Choi, Daejon KR
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20100070644 | APPARATUS AND METHOD FOR TIME-SHIFT SERVICE BASED ON MULTIMEDIA INFORMATION, APPARATUS FOR REPRODUCING MULTIMEDIA USING THE SAME - Provided are a time shift service apparatus and method based on multimedia information, and a multimedia reproducing apparatus using the same. The timeshift service apparatus includes: a timeshift buffering unit for storing a multimedia stream according a timeshift service requested from an outside device; a time obtaining unit for obtaining time information about times of starting and ending a timeshift service according to the timeshift service request; a memory managing unit for storing a multimedia stream, which is serviced based on the obtained time information by the time obtaining unit, in the timeshift buffering unit; and an information generating unit for generating detailed information for the multimedia stream stored in the timeshift buffering unit. | 03-18-2010 |
Jong Ryoo Choi, Daejon KR
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20130065917 | SALT OF NAPHTHYRIDINE CARBOXYLIC ACID DERIVATIVE - 7-(3-Aminomethyl-4-methoxyiminopyrrolidin-1-yl)-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid methanesulfonate and hydrates thereof, processes for their preparation, pharmaceutical compositions comprising them, and their use in antibacterial therapy. | 03-14-2013 |
Joong-Han Choi, Daejon KR
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20100109771 | REPEATING SYSTEM AND METHOD FOR CANCELLATION OF FEEDBACK INTERFERENCE SIGNAL WITH PRE-DISTORTION FUNCTION - There is provided a repeating system for cancellation of a feedback interference signal, including: a PA (Power Amplifier) for power-amplifying an output signal; a feedback ICS (Interference Cancellation System) for canceling a feedback interference signal and detecting a residual error; a pre-distorter for compensating for an error of the PA by applying pre-distortion and compensating for the residual error by using information on the residual error detected by the feedback ICS to linearize the characteristic of the PA; and a control unit for controlling the feedback ICS and the pre-distorter. | 05-06-2010 |
Minn-Seok Choi, Daejon KR
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20090125528 | Apparatus and Method For Classifying E-Mail Using Decision Tree - An apparatus and method for classifying e-mails using a decision tree is disclosed. The apparatus includes: a client e-mail storing unit for storing e-mails according to each folder; a decision tree generating unit for generating a decision tree based on information about e-mails stored according to folders in the client e-mail storing unit; a received e-mail processing unit for receiving e-mails; an e-mail storing unit for storing the e-mails received in the receiving e-mail processing unit; an e-mail classifying unit for classifying the e-mails stored in the e-mail storing unit based on the decision tree; an e-mail transmitting unit for transmitting the classified e-mail to the client e-mail storing unit; and a controlling unit for controlling the units to generate the decision tree based on the e-mails stored in the client e-mail storing unit and to classify the e-mail transmitted from outside based on the decision tree. | 05-14-2009 |
Mi-Ran Choi, Daejon KR
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20100131557 | METHOD AND APPARATUS FOR RETRIEVING MULTIMEDIA CONTENTS - Disclosed is an apparatus and method for retrieving multimedia contents represented in a Moving Picture Experts Group (MPEG) 7 by transforming a user query into an MPEG-7 query format. The method for retrieving multimedia contents includes: representing a user query by using an indicator indicating a specific region of a Moving Picture Experts Group 7 (MPEG-7) document and a reference for referring to the indicator; analyzing a meaning of the user query represented by using the indicator and the reference to thereby produce an analysis result; and retrieving multimedia contents according to the analysis result. The present research can satisfy more than two retrieval conditions within the same structure in an MPEG-7 query format and it can also clearly represent that two different MPEG-7 documents are referred to. Since the meaning of a user query is analyzed accurately during retrieval process, it is possible to precisely retrieve multimedia contents. | 05-27-2010 |
20110179056 | APPARATUS AND METHOD FOR A QUERY EXPRESS - Disclosed is an apparatus and method for expressing a query for searching multimedia data. The apparatus and method of the present invention expresses diverse query types in MPEG-7 query formats and uses field types to re | 07-21-2011 |
Sang Mu Choi, Daejon KR
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20090035201 | PREPARATION METHOD OF TC-99M-LABELED IRON OXIDE NANOPARTICLE AND DIAGNOSTIC IMAGING OR THERAPEUTIC AGENT FOR CANCER DISEASES COMPRISING THE SAME - Disclosed herein are a method of preparing a technetium-99m-labeled iron oxide (Fe | 02-05-2009 |
Sangsung Choi, Daejon KR
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20090147667 | APPARATUS AND METHOD FOR DETECTING PACKET OF ZERO-PADDED OFDM SIGNAL - Provided is an apparatus and method for detecting a packet of a zero-padded OFDM signal, which are capable of determining if a packet exists in a reception (RX) signal by comparing a cross-correlation value of an OFDM signal delayed by a predetermined sample time, e.g., a zero-padded sample time, with a power value of the RX signal, thereby increasing a packet detection probability and preventing a false alarm. The packet detecting apparatus includes: a cross-correlation calculator for calculating a cross-correlation value of a reception signal received from the outside and delaying the calculated cross-correlation value by a predetermined sample time; a power calculator for calculating a power value of the reception signal; and a packet detector for determining if a packet exists in the reception signal by comparing the delayed cross-correlation value with the calculated power value, and detecting the corresponding packet. | 06-11-2009 |
Sang-Sung Choi, Daejon KR
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20080212564 | Clock Synchronization Method For Wireless 1394 Heterogeneous Networks - Provided is a clock synchronization method in a heterogeneous network. The method includes the steps of: at a cycle master, transferring a cycle begin packet with a current time to a transmitting-side bridge; at the transmitting-side bridge, synchronizing using the time included in the cycle begin packet and a time to transmit the cycle begin packet, and transmitting the cycle begin packet with a first synchronization time to a wireless 1394 coordinator; at the wireless 1394 coordinator, synchronizing using the first synchronization time and calculating a second synchronization time; at the wireless 1394 coordinator, transmitting the beacon frame with a created information element structure to a receiving side bridge on a wired IEEE 1394 network; at the receiving bridge, synchronizing using the second synchronization time and calculating a third synchronization time; and at the receiving-side bridge, synchronizing the heterogeneous network by transferring the third synchronization time to the receiving node. | 09-04-2008 |
Seibum Choi, Daejon KR
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20100288595 | Disk friction clutch apparatus using self-energizing effect - A disk friction clutch apparatus using a self-energizing effect is disclosed. The clutch apparatus includes a drive friction disk connected to a drive shaft, a driven friction disk connected to a driven shaft, a push member configured to press the driven friction disk against the drive friction disk at an engagement position of a clutch, and an operation unit configured to shift the push member from the release position of the clutch to the engagement position. The operation unit is operated to increase a force of the push member to press the driven friction disk when the push member located at the engagement position of the clutch receives a force of rotating the drive shaft. Since the clutch apparatus employs a self-energizing effect, it is possible to fasten the clutch with a small force. | 11-18-2010 |
20110042976 | Length-variable shock absorbing apparatus for vehicle - Disclosed is a length-variable bumper capable of adjusting the length of a vehicle body to lengthen a time interval over which momentum changes upon collision. The length-variable bumper includes a bumper member primarily absorbing collision energy, a collision energy absorbing member foldable in a longitudinal direction, and an operation unit configured to transit the collision energy absorbing member to an unfolded state when a vehicle speed is a predetermined level or more and to transit the collision energy absorbing member to a folded state when the vehicle is the to predetermined level or less. The collision energy absorbing member has one end connected to a frame of the vehicle and the other end connected to the bumper member and configured to be deformed upon collision to secondarily absorb the collision energy. | 02-24-2011 |
Seong-Hwan Choi, Daejon KR
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20080294585 | Real-Time Business Process Triggering System and Method Using Rfid - Provided is a real-time business process triggering system (RBPTS) using a Radio Frequency Identification (RFID) and a method thereof. The RBPTS is to provides interface to a corporation information system by generating an RFID event proper to a specific domain by giving the RFID data a business meaning to apply the RFID data to a predetermined rule before transmitting the RFID data to the corporation information system, provide a rule modeling function to flexibly managing changes in application field and environment, and provide an RFID related-action related to rule performance, and a method thereof. The RBPTS includes: an RFID middleware adapter for receiving RFID data from an RFID middleware/RFID reader and generating RFID events Extensible Markup Language (XML) document; an event manager for receiving the RFID events XML document from the RFID middleware adapter and generating an event query for inference; a rule manager for generating a result set by performing rule inference on the event query through an inference engine and generating an action list; Web Service arbitrator for communicating through Web Service using an external application and a Simple Object Access Protocol (SOAP); an action manager for performing real-time action by calling the Web Service through the Web Service arbitrator based on the action list; and an event repository for storing and managing registered all RFID event information, rule and action. The RBPTS is applied to maritime freight transportation. | 11-27-2008 |
Seung Min Choi, Daejon KR
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20080240547 | Apparatus And Method For Vision Processing On Network Based Intelligent Service Robot System And The System Using The Same - There are provided an apparatus and method for vision processing on a network based intelligent service robot system and a system using the same. A robot can move to a target object, avoiding obstacles without helps of a robot server interfaced with a robot terminal over network, by extracting/processing three-dimensional distance information of external objects, using a stereo camera, a low price image processing dedicated chip and an embedded processor. Therefore, the intelligent robot can travel and move using only a stereo camera image processing without other sensors, and further provides users with various functional services with low expense. | 10-02-2008 |
So-Young Choi, Daejon KR
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20110318361 | Anticancer Drug Comprising Inhibitor of Tmprss4 - The present invention relates to an anticancer agent containing a TMPRSS4 (transmembrane protease, serine 4) inhibitor as an effective ingredient, more precisely an anticancer agent containing an inhibitor of TMPRSS4 activity as an effective ingredient. The anticancer agent of the present invention can be used effectively for the treatment of cancer by inhibiting TMPRSS4 expression in cancer cells and thereby inhibiting cancer cell invasion and cancer cell growth. | 12-29-2011 |
Sung-Woong Choi, Daejon KR
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20110194811 | FIBER OPTIC ROTARY JOINT AND ANTENNA, ANTENNA MEASUREMENT SYSTEM, AND WIRELESS COMMUNICATION SYSTEM - Provided are a fiber optic rotary joint, an antenna having the same, an antenna measurement system, and a wireless communication system. An antenna measurement system includes an electro-optic converting unit for converting an electric signal to an optical signal, a first optical fiber for transferring the converted optical signal from the electro-optic converting unit, a second optical fiber having a diameter larger than the first optical fiber and transferring the optical signal outputted from the first optical fiber, an align unit for aligning the first optical fiber with the second optical fiber, and an opto-electric converting unit for converting the optical signal outputted from the second optical fiber to the electric signal. | 08-11-2011 |
Sung-Yool Choi, Daejon KR
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20100065803 | MEMORY DEVICE AND MANUFACTURING METHOD THEREOF - Provided is a resistance variable non-volatile memory device using a trap-controlled Space Charge Limited Current (SCLC), and a manufacturing method thereof. The memory device includes a bottom electrode; an inter-electrode dielectric thin film diffusion prevention film formed on the bottom electrode; a dielectric thin film formed on the inter-electrode dielectric thin film diffusion prevention film and having a plurality of layers with different charge trap densities; and a top electrode formed on the dielectric thin film. | 03-18-2010 |
Wan Choi, Daejon JP
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20100017863 | PORTABLE STORAGE APPARATUS FOR PROVIDING WORKING ENVIRONMENT MIGRATION SERVICE AND METHOD THEREOF - Provided are an apparatus and method for providing a working environment migration service. The portable storage apparatus, includes: a management and execution unit for performing user authentication by connection to an external user terminal, managing a user profile and application information, and executing a context management unit; a working environment storage unit for storing an application context and data representing the working state at the time of log out; and the context management unit for recovering and executing the application context and data stored in the working environment storage unit upon execution by the management and execution unit, and collecting the application context and data representing the working state at the time of log out, and storing them in the working environment storage unit. | 01-21-2010 |
Wan Choi, Daejon KR
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20100017795 | SERVER, TERMINAL, AND METHOD FOR SOFTWARE GROUP SERVICE - Provided are a server, a terminal, and a method for providing a software group service. The software group service server includes: a software storing unit for storing a plurality of software; a software group managing unit for grouping software stored in the software storing unit by user and managing lists of the grouped software; a web service providing unit for inquiring a software group list requested from a user to the software group managing unit and provides the requested software group list to the terminal; and a software group providing unit for receiving a request of a software group service from the terminal, searching a corresponding software group from the software storing unit, and providing the searched software group to the terminal. | 01-21-2010 |
Wan-Sik Choi, Daejon KR
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20100049439 | APPARATUS FOR INTEGRATED NAVIGATION BASED ON MULTI FILTER FUSION AND METHOD FOR PROVIDING NAVIGATION INFORMATION USING THE SAME - Provided are an integrated navigation apparatus and a method for providing navigation information using the same. The integrated navigation apparatus includes a first filter, a second filter, a mode probability updating unit, a first navigation information calculating unit, a second navigation information calculating unit, a fusion unit and a navigation information fusion unit. | 02-25-2010 |
Won Joon Choi, Daejon KR
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20150183332 | BATTERY EXCHANGE STATION AND METHOD OF OPERATING BATTERY EXCHANGE STATION - A battery exchange station and a method of operating the battery exchange station are provided which can solve conventional problems, such as the unavailability of electricity stored in a battery, the difficulties in coping with changes in system operation, and the difficulties in utilizing renewable energy. The battery exchange station and the method of operating the battery exchange station allow for utilization of electricity stored in a battery and improve a system's operation and electricity demand conditions by charging a large-capacity battery with electricity coming from the system and providing the electricity stored in the large-capacity battery to the system. | 07-02-2015 |
Won-Kyu Choi, Daejon KR
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20080309578 | Antenna Using Proximity-Coupling Between Radiation Patch and Short-Ended Feed Line, Rfid Tag Employing the Same, and Antenna Impedance Matching Method Thereof - Provided is an antenna based on proximity coupling between a short-ended microstrip feed line and a radiation patch, an RFID tag including the planar antenna, and an antenna impedance matching method thereof. The antenna includes a radiation patch configured to determine a resonant frequency of the antenna; a ground plate disposed in parallel to the radiation patch; and a feeding part disposed between the radiation patch and the ground plate and configured to provide radio frequency signals to a device connected to the antenna. The feeding part includes a feed line that is formed in a resonance length direction of the radiation patch and proximity-coupled with the radiation patch and one end of the feed line is shorted. The antenna freely controls the resistance and reactance of the antenna impedance independently and efficiently matched to a device connected to the antenna which has a predetermined impedance in wide bands. | 12-18-2008 |
Yeon Suk Choi, Daejon KR
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20140180625 | System and method of predicting initial cooling of superconducting magnet - The present invention provides a system and method of predicting the initial cooling of a superconducting magnet, which can predict the change in initial cooling temperature of a superconducting magnet when the superconducting magnet is cooled using an ultra-low refrigerator. In the system and method, the change in cooling temperature of a superconducting magnet can be accurately predicted by classifying influence factors related to the cooling of a superconducting magnet into a plurality of control volumes and inducing a governing equation with respect to each of the control volumes. Based on this system and method, the reliability of basic data required to design an apparatus for measuring a high magnetic field for forming an ultralow-temperature environment can be greatly improved. | 06-26-2014 |
Yun-Ho Choi, Daejon KR
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20090160558 | RF AMPLIFIER - Provided is a radio frequency (RF) amplifier. The RF amplifier includes an amplification circuit amplifying an RF signal, a bias voltage generation circuit supplying a bias voltage of the amplification circuit, and a first bias resistor connected between the amplification circuit ad the bias voltage generation circuit, and having a predetermined resistance allowing the bias voltage to be affected by the RF signal. | 06-25-2009 |
Yunjung Choi, Daejon KR
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20110261877 | STEREOSCOPIC VIDEO ENCODING/DECODING APPARATUSES SUPPORTING MULTI-DISPLAY MODES AND METHODS THEREOF - Provided is a stereoscopic video encoding and/or decoding apparatus that supports multi-display modes, the encoding/decoding method thereof and computer-readable recording medium for recording a program that implements the encoding/decoding method. The encoding apparatus of this research incorporates: a field separating means for separating right and left-eye input images into an odd field of the left-eye image (LO), even field of the left-eye image (LE), odd-numbered field (RO) of the right-eye image, and even-numbered field (RE) of the right-eye image; an encoding means for encoding the fields separated in the field separating means by performing motion and disparity compensation; and a multiplexing means for multiplexing the essential fields among the fields received from the encoding means, based on the user display information. | 10-27-2011 |