Patents by Inventor Kyu Hwan An

Kyu Hwan An has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20180322157
    Abstract: Technologies are described providing adaptive query routing in a replicated database environment. The technologies can be used with a variety of replication protocols. Prepared statements, such as for queries, from a database client can be routed to a source node, or a source node and available replica nodes, when a replica node becomes unavailable. When a replica node becomes available again, a prepared statement can be updated to indicate that the updated prepared statement can be executed at nodes including the replica node that is available again. Prepared statement routing can also be used when a portion of replicated data becomes unavailable at a replica node, but a portion of replicated data remains available.
    Type: Application
    Filed: May 8, 2017
    Publication date: November 8, 2018
    Applicant: SAP SE
    Inventors: Juchang Lee, Kyu Hwan Kim, Joo Yeon Lee, Kyungyul Park, Deok Hoe Kim
  • Patent number: 10095764
    Abstract: Technologies are described for performing replication within a database environment. Where a database transaction is replicated at multiple replica nodes, a replica node is selected as a coordinator replica node for the transaction. The other replica node or nodes are designated as follower replica nodes for the transaction. A follower replica node sends the coordinator replica node a precommit notification when the follower replica node has precommitted the transaction. The coordinator replica node sends the follower replica node a postcommit notification to commit the transaction when the transaction has been precommitted by all of the replica nodes to which the transaction is to be replicated.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: October 9, 2018
    Assignee: SAP SE
    Inventors: Chang Gyoo Park, Juchang Lee, Kyu Hwan Kim, Hyoung Jun Na, Hyejeong Lee
  • Patent number: 10074855
    Abstract: An electrode for a lithium secondary battery including a silicon-based alloy having an expansion coefficient of 10% or greater and an electrochemically inactive whisker, and a lithium secondary battery using the electrode for a lithium secondary battery.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: September 11, 2018
    Assignees: Samsung SDI Co., Ltd., SNU R&DB Foundation
    Inventors: Jae-Hyuk Kim, Young-Ugk Kim, Seung-Uk Kwon, Soon-Sung Suh, Hee-Young Chu, Duk-Hyoung Yoon, Chang-Ui Jeong, Yo-Han Park, Kyu-Hwan Oh, Seoung-Bum Son, Seul-Cham Kim, Chan-Soon Kang
  • Publication number: 20180246928
    Abstract: A computer implemented method is provided for determining a delay between a first database and an associated replicated database by replicating transactions of the first database in the replicated database, determining a delay between the two databases based on a commit timestamp from the first database and a timestamp associated with the commit transaction becoming visible in the replicated database. Then, after a predefined period of time has elapsed since replicating the commit transaction, determining a second delay based on a timestamp associated with a heartbeat log and a replicated database system time. And, selectively determining to execute or deny a statement received by the replicated database based on the second delay. Related apparatus, systems, techniques and articles are also described.
    Type: Application
    Filed: February 27, 2017
    Publication date: August 30, 2018
    Inventors: Kyu Hwan Kim, Deok Hoe Kim, Beomsoo Kim, Juchang Lee, Werner Thesing, Christoph Roterring
  • Publication number: 20180232603
    Abstract: Provided are a method and program for computing a bone age using a deep neural network. The method for computing a bone age using a deep neural network, including: receiving an analysis target image that is a specific medical image to compute the bone age; and analyzing the analysis target image by at least one computer using the deep neural network to compute the bone age. According to the present disclosure, since the bone age is computed by accumulating medical images of a specific race (particularly, Korean) and analyzing the same, it is possible to compute an accurate bone age that conforms to race.
    Type: Application
    Filed: December 30, 2015
    Publication date: August 16, 2018
    Inventors: Woo Hyun Shim, Jin Seong Lee, Yu Sub Sung, Hee Mang Yoon, Jung Hwan Baek, Sang Ki Kim, Hyun Jun Kim, Ye Ha Lee, Kyu Hwan Jung
  • Publication number: 20180232412
    Abstract: Technologies are described for facilitating database system recovery in a distributed database environment having a master node and at least one slave node. The master node maintains an in-memory reference that includes transaction identifiers and their corresponding commit identifiers. When a slave node requests that a commit identifier be assigned to a transaction, the transaction and commit identifiers for the transaction are added to the in-memory reference. The commit identifier is sent by the master node to the slave node. The slave node writes a log entry to a commit log that includes the transaction identifier and the assigned commit identifier. If the database system is interrupted before the slave node writes the commit log entry, the slave node can request the commit identifier for the transaction from the master node, which retrieves the identifier from the in-memory reference.
    Type: Application
    Filed: February 10, 2017
    Publication date: August 16, 2018
    Applicant: SAP SE
    Inventors: Christian Bensberg, Steffen Geissinger, Juchang Lee, Chang Gyoo Park, Kyu Hwan Kim, Deok Koo Kim
  • Patent number: 10036884
    Abstract: A display including an electrowetting prism array is provided. The display includes: a light source, a 2-dimensional (2D) display for providing an image using light from the light source, a prism array in which a refractive power of one or more prisms of the prism array is adjustable in real time, and an optical element which increases a refraction of light transmitted therethrough. In the display, the optical element may be disposed in front of or behind the prism array. The optical element may be a convex lens, a Fresnel lens, a holographic optical element (HOE), a diffraction optical element (DOE), or a second electrowetting prism array. The convex lens may be a variable focus lens.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: July 31, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yun-hee Kim, Hoon Song, Jung-mok Bae, Kyu-hwan Choi, Yoon-sun Choi, Yong-joo Kwon
  • Publication number: 20180186360
    Abstract: The present disclosure provides a hybrid vehicle and a method of predicting a driving pattern in the same. The method includes: acquiring current vehicle driving information, determining an upcoming event and a driving style based on the current vehicle driving information, and generating an acceleration/deceleration prediction value based on a prediction model corresponding to the upcoming event and the driving style selected from a plurality of pre-learned prediction models.
    Type: Application
    Filed: September 22, 2017
    Publication date: July 5, 2018
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Kyu Hwan JO, Joon Young PARK
  • Publication number: 20180179717
    Abstract: An oil-collecting apparatus includes: a body including an inlet through which a liquid is introduced, a first outlet through which purified water generated from the liquid introduced through the inlet is discharged, and a second outlet through which materials collected from the liquid are discharged; and a filter arranged at the first outlet of the body and generating the purified water by collecting the materials included in the liquid by allowing the liquid introduced through the inlet to pass therethrough.
    Type: Application
    Filed: December 27, 2017
    Publication date: June 28, 2018
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Heon Ju Lee, Myoung-Woon Moon, O Chang Kwon, Do Hyun Kim, Tae Jun Ko, Ho-Young Kim, Hyungmin Park, Kyu Hwan Oh
  • Publication number: 20180171454
    Abstract: A method of roll-forming a high-strength aluminum alloy, may include processing an aluminum alloy plate to form a square bar, pressing the plate so that deformation begins in a cross section thereof; and forming the square bar having at least one bent portion by completion of the deformation, wherein the method further includes partially performing a heat treatment on the bent portion before forming the square bar.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 21, 2018
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Kyu-Hwan OH
  • Publication number: 20180170347
    Abstract: A method for controlling a coasting drive of an environmentally friendly vehicle includes: calculating a coasting velocity of the environmentally friendly vehicle at a deceleration event point based on a target coasting distance up to the deceleration event point and a gradient at the deceleration event point; calculating a control target velocity of the environmentally friendly vehicle based on a target velocity of the environmentally friendly vehicle at the deceleration event point and the calculated coasting velocity; and determining control torque to adjust a velocity of the environmentally friendly vehicle to the target velocity to be output to a powertrain of the environmentally friendly vehicle based on the calculated control target velocity.
    Type: Application
    Filed: May 23, 2017
    Publication date: June 21, 2018
    Inventors: Do Hee Kim, Jaekyu Hyun, Kyu Hwan Jo
  • Patent number: 9991520
    Abstract: A flexible secondary battery includes an exterior member having an accommodation space inside, a cathode collector and an anode collector located in the accommodation space and spaced apart from each other, a cathode active material portion on the cathode collector, and an anode active material portion on the anode collector. The cathode collector includes a first connection portion extending in a first direction and a plurality of first leg portions protruding from the first connection portion in a second direction different from the first direction. The anode collector includes a second connection portion parallel to the first connection portion and a plurality of second leg portions protruding from the second connection portion toward the first connection portion. The first leg portions and the second leg portions are alternately arranged between the first connection portion and the second connection portion. The cathode active material portion is located only on the first leg portions.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: June 5, 2018
    Assignee: Korea Institute of Science and Technology
    Inventors: Insuk Choi, Kee Bum Kim, Kyu Hwan Oh
  • Publication number: 20180150504
    Abstract: A computer implemented method for initializing a first image of a first database from a recovery image; modifying the first image of the first database by replaying transaction logs of a second database; establishing a connection with a client; receiving a query via the connection, the query including a transaction to be executed on the first database; and rejecting the query when the transaction would cause any one of: updating of the first image of the first database; generating a new transaction log; and modifying the recovery image. Related apparatus, systems, techniques and articles are also described.
    Type: Application
    Filed: November 30, 2016
    Publication date: May 31, 2018
    Inventors: Chul Won Lee, Kyu Hwan Kim, Marcel Birn, Jane Jung Lee, Di Wu, Juchang Lee, Zhi Qiao
  • Publication number: 20180150496
    Abstract: A computer implemented method is provided comprising receiving a group of transaction logs from a first database, allocating transaction logs from the group of transaction logs to a first queue and to a second queue, generating an end-of-group transaction log indicative of an end of the group of transaction logs, allocating the end-of-group log to the first queue and the second queue; replaying transaction logs from the first queue including the end-of-group transaction log allocated to the first queue, replaying transaction logs from the second queue including the end-of-group transaction log allocated to the second queue; and changing visibility of one or more transactions in response to replaying the end-of-group transaction log allocated to the first queue and the end-of-group transaction log allocated to the second queue. Related apparatus, systems, techniques and articles are also described.
    Type: Application
    Filed: November 28, 2016
    Publication date: May 31, 2018
    Inventors: Kyu Hwan Kim, Juchang Lee, Beomsoo Kim, Chang Gyoo Park, Reiner Singer, Christoph Rottering, Werner Thesing, Michael Muehle
  • Publication number: 20180150360
    Abstract: A computer implemented method is provided. The method comprises initializing a first database image of a first database system based on a recovery image comprising committed transactions, visible uncommitted transactions, and undo logs associated with the visible uncommitted transactions, undoing the visible uncommitted transactions using the undo logs, generating redo logs from the undo logs, replaying the redo logs to create invisible uncommitted transactions, and after replaying the redo logs, replaying transaction logs received from a second database system. Related apparatus, systems, techniques and articles are also described.
    Type: Application
    Filed: November 28, 2016
    Publication date: May 31, 2018
    Inventors: Yong Sik Kwon, Hyeong Seog Kim, Kyu Hwan Kim, Seyeong Bae, Joo Yeon Lee, Beomsoo Kim, Juchang Lee, Marcel Birn
  • Patent number: 9983457
    Abstract: A complex spatial light modulator includes a polarization-phase modulator for separating an incident beam into a first beam having a first polarization and a first phase, and a second beam having a second polarization and a second phase, and for outputting the first beam and the second beam; and a beam synthesizer including a prism structure formed of an optical anisotropic material having a first refractive index with respect to the first beam having the first polarization and having a second refractive index, different form the first refractive index, with respect to the second beam having the second polarization, where the beam synthesizer combines the first beam and the second beam.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 29, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Gee-young Sung, Hoon Song, Kang-hee Won, Kyu-hwan Choi
  • Patent number: 9969723
    Abstract: The present invention relates to a novel 3-(4-(benzyloxy)phenyl)hex-4-inoic acid derivative, a preparation method thereof, and a pharmaceutical composition comprising the same as an active ingredient for the prevention and treatment of metabolic disease. The novel 3-(4-(benzyloxy)phenyl)hex-4-inoic acid derivative, the optical isomer thereof, or the pharmaceutically acceptable salt thereof of the present invention has excellent activities of activating GPR40 protein and promoting insulin secretion accordingly but has no toxicity when co-administered with other drugs.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: May 15, 2018
    Assignee: HYUNDAI PHARM CO., LTD
    Inventors: Jin Yang, Jin Woong Kim, Han Kyu Lee, Jae Hyun Kim, Chang Mo Son, kyu hwan Lee, Hyung-Ho Choi, daehoon Kim, Tae-Young Ha, Jaekeol Rhee
  • Patent number: 9965360
    Abstract: Disclosed herein are system, method, and computer program product embodiments for synchronizing lost change between a source table and a replica table. An embodiment operates by detecting a restart at a source node or a replica node. Row-ID values of replication log entries are then compared to row-ID column values of rows at a replica table of the replica node. Replication errors at a source table or the replica table are then determined based on the row-ID comparison. The rows of the source table and the replica table are then updated based on the determination.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: May 8, 2018
    Assignee: SAP SE
    Inventors: Juchang Lee, Kyu-Hwan Kim, Hyoung-Jun Na, Chang-Gyoo Park, Hyejeong Lee
  • Patent number: 9959178
    Abstract: Disclosed herein are system, method, and computer program product embodiments for replicating a database transaction to a replica table. An embodiment operates by receiving a replication log entry and an associated transaction commit log entry for a database transaction to be replayed to a row at a replica table. A row-ID value of the replication log entry is compared to a row-ID column value of the row at the replica table. The replication log entry is then replayed at a parallel log replayer based on the comparison. The database transaction is then committed to the replica table by replaying the associated transaction commit log entry at a transaction log replayer.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: May 1, 2018
    Assignee: SAP SE
    Inventors: Juchang Lee, Chang-Gyoo Park, Hyoung-Jun Na, Kyu-Hwan Kim
  • Patent number: 9949336
    Abstract: An organic light emitting diode device includes a first electrode, a second electrode opposite the first electrode, and an emission layer between the first and second electrodes. The first electrode includes a Ag—Mg alloy including a greater amount of Ag than Mg.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: April 17, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seok-Gyu Yoon, Dong Chan Kim, Sung Chul Kim, Won Jong Kim, Eung Do Kim, Young Woo Song, Jong Hyuk Lee, Bo Ra Jung, Kyu Hwan Hwang