Yongsuk
Yongsuk Byun, Seoul KR
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20140376654 | METHOD AND DEVICE FOR ENERGY EFFICIENT SIGNAL TRANSMISSION IN MASSIVE MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method for selecting a Multiple-Input Multiple-Output (MIMO) mode based on energy efficiency and selecting an antenna subset to be used in a communication, in a wireless communication system using a multi-user massive multi-antenna is provided. The method selects an antenna subset capable of minimizing transmission power without using all antennas, based on power consumed by an Radio Frequency (RF) circuit as well as the transmission power. The method further includes selecting a mobile station to which the signal is to be transmitted, selecting a multi-antenna technique based on power consumption of all antennas, selecting an antenna subset to transmit the signal to the mobile station among all the antennas, and transmitting the signal to the mobile station by using the antenna subset. | 12-25-2014 |
20150280793 | METHOD AND DEVICE FOR ENERGY EFFICIENT SIGNAL TRANSMISSION IN MASSIVE MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method for selecting a Multiple-Input Multiple-Output (MIMO) mode based on energy efficiency and selecting an antenna subset to be used in a communication, in a wireless communication system using a multi-user massive multi-antenna is provided. The method selects an antenna subset capable of minimizing transmission power without using all antennas, based on power consumed by an Radio Frequency (RF) circuit as well as the transmission power. The method further includes selecting a mobile station to which the signal is to be transmitted, selecting a multi-antenna technique based on power consumption of all antennas, selecting an antenna subset to transmit the signal to the mobile station among all the antennas, and transmitting the signal to the mobile station by using the antenna subset. | 10-01-2015 |
Yongsuk Heo, Seoul KR
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20140162168 | FUEL CELL STACK - A fuel cell stack is provided that includes: i) a plurality of unit cells that are stacked together; ii) end plates that are each disposed at outermost ends of the unit cells and that press the plurality of unit cells together; and iii) a plurality of tension bars that engage the end plates, wherein an tension bar corresponding to an outermost portion of the unit cells has a predetermined angle of slope and engages with the end plate. | 06-12-2014 |
20160036084 | FUEL CELL STACK - Disclosed herein is a fuel cell stack. The fuel cell stack includes: at least one unit stack comprising an assembly of unit cells and an enclosure protecting the unit stack. In particular, reaction gas inlet/outlet channels for supplying reaction gas to the unit stack are formed on a first side surface of the enclosure, and coolant inlet/outlet channels for supplying coolant to the unit stack are formed on a second side surface of the enclosure. | 02-04-2016 |
Yongsuk Kim, Gyeonggi-Do KR
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20120145209 | THERMOELECTRIC ELEMENT AND THERMOELECTRIC MODULE INCLUDING THE SAME - Disclosed herein are a thermoelectric element and a thermoelectric module including the same. The thermoelectric element is manufactured by differently setting diameter, density, and flatness, or laminating a plurality of sheets formed by mixing of metal or non-metal materials. Thus, thermoelectric figure of merit is improved in the thermoelectric module. Also, thermoelectric figure of merit, reliability, and efficiency of manufacturing process are improved in the thermoelectric module. | 06-14-2012 |
Yongsuk Kwon, Suzhou CN
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20100035385 | ALUMINUM BUMP BONDING FOR FINE ALUMINUM WIRE - The invention includes a packaged semiconductor device in which the bond wires are bonded to the leads with an aluminum bump bond. The semiconductor device is mounted on a leadframe having leads with a nickel plating. To form the bump bond between a fine aluminum wire, such as a 2 mil diameter wire, and the lead, an aluminum bump is bonded to the nickel plating and the wire is bonded to the bump. The bump is aluminum doped with nickel and is formed from a large diameter wire, such as a 6 mil diameter wire. | 02-11-2010 |
Yongsuk Lee, Seoul KR
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20150254962 | METHOD AND APPARATUS FOR PREVENTING LOSING ELECTRONIC DEVICES - A method and an apparatus for preventing the loss of an electronic device are provided. The method includes establishing a communication link between a first electronic device and a second electronic device through activation of wireless communication at the first electronic device, collecting, upon detection of movement of the first electronic device, sensing information of the first electronic device, receiving sensing information from the second electronic device through the communication link, comparing the sensing information of the first electronic device with the sensing information of the second electronic device, and checking whether a loss incident has occurred on the basis of the comparison result. | 09-10-2015 |
Yongsuk Lee, Suwon-Si KR
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20130189445 | APPARATUS AND METHOD FOR DEPOSITING THIN FILM - A thin film deposition apparatus includes a substrate supporting unit supporting a substrate, a deposition source evaporating a deposition material to supply a steam of the deposition material to the substrate, and a deposition source shifting unit moving the deposition source so that the deposition source is relatively shifted with respect to the substrate supporting unit. | 07-25-2013 |
Yongsuk Park, Seoul KR
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20090323964 | SYSTEM AND METHOD OF UPDATING KEY BASED ON COMMUNICATION COST AND SECURITY DAMAGE COST - A system and method of updating a key based on communication and security damage costs are provided. The key updating system for group communication between a plurality of group members, includes a key update cycle determining unit to determine a key update cycle based on a communication cost and a security damage cost, and a key updating unit to perform a key updating with respect to one or more group members of the group communication based on the determined key update cycle. | 12-31-2009 |
20110002252 | FRAME STRUCTURE FOR PICONET MASTER NODE ON/OFF SCHEDULING AND METHOD THEREOF - A frame structure for piconet master node on/off scheduling and method thereof. The frame structure includes a schedule-based data period, a contention-based active period, a schedule-based schedule notification message period directly following the contention-based active period, and an inactive sleep mode period positioned before the schedule-based data period, before or after the contention-based active period, or after the schedule-based schedule notification message period. | 01-06-2011 |
20110007672 | COMMUNICATION METHOD AND APPARATUS IN WIRELESS BODY AREA NETWORK - Short range wireless communication is provided. A first node included in a Wireless Body Area Network (WBAN) communicates with at least one neighboring second node. The first node transmits or receives data to or from at least one device node connected to the first node during a time division communication period, using a super-frame in which the time division communication period, a time division schedule advertisement message transmission period, and a Contention Access Period (CAP) are sequentially arranged. The first node broadcasts a time division schedule advertisement message of the first node to the at least one second node during the time division schedule advertisement message transmission period within the super-frame. Upon receiving a time division schedule advertisement message from the second node during the CAP within the super-frame, the first node adjusts a data transmission or reception time for the at least one device node connected to the first node using the received time division schedule advertisement message. | 01-13-2011 |
20130238752 | APPARATUS AND METHOD FOR MANAGING CONTENT FOR CLOUD COMPUTING - A cloud service system includes at least one user device, a plurality of clouds for providing different cloud services, and a gateway connected between the user device and the clouds. The gateway selects at least one of the clouds according to predefined Service Level Agreement (SLA) information, and stores content provided from the user device to the selected cloud. | 09-12-2013 |
20130246616 | APPARATUS AND METHOD FOR DETERMINING SOURCE DEVICE IN CONTENTS SHARING SYSTEM - A method for determining a source and a transmission path to provide content includes receiving a message comprising at least one of channel information of a link between a request device which requests content download and a central management device, available resource amount information of a candidate device, channel information of a link between the candidate device and the central management device, and channel information of a link between the request device and one candidate device. The method also includes determining a source device and the transmission path for providing the content to the request device using an available resource amount of the candidate device, a data rate of the link between the request device and the central management device, a data rate of the link between the request device and the candidate device, and a data rate of the link between the candidate device and the central management device. | 09-19-2013 |
20130247223 | APPARATUS AND METHOD FOR ENSURING PRIVACY IN CONTENTS SHARING SYSTEM - A privacy protection policy is present in a content sharing system. A method for managing contents in a content sharing system includes receiving a content download request from a first account through a first device; and determining whether to carry out the download by considering at least one of a sharing range of a download-requested content, a content access right of the first account, a content access right of an owner account of the first device, a sharing range of a download folder, and sharing acceptance or rejection of an owner of the content. | 09-19-2013 |
Yongsuk Yeo, Seongnam-Si KR
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20160142529 | MOBILE COMMUNICATION DEVICE - A mobile communication device includes: a first sound transceiver including a first lower electrode, a first upper electrode, and a first vibration plate between the first lower electrode and the first upper electrode; a second sound transceiver including a second lower electrode, a second upper electrode, and a second vibration plate between the second lower electrode and the second upper electrode; a position sensor configured to perform a detection of a relative positional relationship between the first and second sound transceivers; and a controller configured to apply a sound signal to one of the first and second sound transceivers and detect a sound signal from the other one thereof, based on the detection result provided from the position sensor. | 05-19-2016 |