Patents by Inventor Jung Kook Lee
Jung Kook Lee 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).
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Patent number: 11952647Abstract: There is provided a ferritic lightweight steel which contains 2.0 to 3.0 wt % manganese (Mn), 5.0 to 6.0 wt % aluminum (Al) and 0.1 to 0.3 wt % carbon (C) and has a tensile strength of 900 MPa to 1,108 MPa. The lightweight steel includes ferrite-austenite dual grains as a result of performing low-temperature tempering-induced partitioning (LTP) at 300° C. for 10 minutes after isothermal annealing.Type: GrantFiled: November 11, 2021Date of Patent: April 9, 2024Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITYInventors: Jae Bok Seol, Hyo Ju Bae, Kwang Gyu Koh, Jung Gi Kim, Hyo Kyung Sung, Young Kook Lee
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Patent number: 11449504Abstract: Provided is a system and method for pruning partitions from a database access operation based on a dependency graph. In one example, the method may include generating a dependency graph for a partition-wise operation, the dependency graph comprising nodes representing partition candidates and links between the nodes identifying dependencies of the partition candidates, receiving, at runtime, a database query comprising a partition identifier, identifying a partition candidate that can be excluded from processing the database query based on the partition identifier, pruning a second partition candidate based on a dependency in the dependency graph between the excluded partition candidate and the second partition candidate, and performing a database access for the database query based on the pruning.Type: GrantFiled: April 12, 2019Date of Patent: September 20, 2022Assignee: SAP SEInventors: Jung Kook Lee, Sang II Song
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Patent number: 11327968Abstract: Methods, systems, and computer-readable storage media for calculating, for each operator in a set of operators, a set of costs, each cost associated with a data format and including a first segment indicating a cost of an operator to convert an incoming data format to an access format and a second segment indicating a cost based on a set of costs of one or more ancestors of the operator, a conversion cost, and a materialization cost, indicating, along the path within the query plan, a location representing execution of a conversion from a first data format to a second data format, the location being selected based on the sets of costs, and providing the query plan with the location for execution to generate a query result, wherein during execution of the query plan, conversion of data from the first data format to the second data format occurs at the location.Type: GrantFiled: April 2, 2020Date of Patent: May 10, 2022Assignee: SAP SEInventors: Dan Bi Park, Jung Kook Lee, Sung Heun Wi, Sang Il Song
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Patent number: 11294903Abstract: A system includes determination, for a first partitioned physical query operator in a query operator tree, of a partition-wise placement cost based on a cost of each table partition associated with the first partitioned physical query operator and a partition-wise placement cost of any child physical query operator of the first partitioned physical query operator, determination of a placement cost for the first partitioned physical query operator physical query operator for each of a plurality of operator execution locations based on the determined partition-wise placement cost, determination, for a logical query operator associated with the first partitioned physical query operator, of a merged placement cost for each of the plurality of operator execution locations, and determination an execution location for the first partitioned physical query operator based on the determined partition-wise placement cost.Type: GrantFiled: April 3, 2019Date of Patent: April 5, 2022Assignee: SAP SEInventors: JunGyoung Seong, Jane Jung Lee, Jung Kook Lee, Sehee Shim
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Patent number: 11157500Abstract: A system includes determination of a first partition-wise operation on a first database table partition of a first table located at a first server node and a first database table partition of a second table located at a second server node, determination of a first cost to execute the first partition-wise operation on the first server node, and a second cost to execute the first partition-wise operation on the second server node, determination of a second partition-wise operation on a result of the first partition-wise operation, determination of a third cost to execute the second partition-wise operation on the first server node based on the first cost and the second cost, and a fourth cost to execute the second partition-wise operation on the second server node based on the first cost and the second cost, determination of one of the first server node and the second server node to execute the second partition-wise operation based on the third cost and the fourth cost, and determination of one of the first serType: GrantFiled: April 3, 2019Date of Patent: October 26, 2021Assignee: SAP SEInventors: JunGyoung Seong, Jane Jung Lee, Jung Kook Lee
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Publication number: 20210311944Abstract: Methods, systems, and computer-readable storage media for calculating, for each operator in a set of operators, a set of costs, each cost associated with a data format and including a first segment indicating a cost of an operator to convert an incoming data format to an access format and a second segment indicating a cost based on a set of costs of one or more ancestors of the operator, a conversion cost, and a materialization cost, indicating, along the path within the query plan, a location representing execution of a conversion from a first data format to a second data format, the location being selected based on the sets of costs, and providing the query plan with the location for execution to generate a query result, wherein during execution of the query plan, conversion of data from the first data format to the second data format occurs at the location.Type: ApplicationFiled: April 2, 2020Publication date: October 7, 2021Inventors: Dan Bi Park, Jung Kook Lee, Sung Heun Wi, Sang Il Song
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Publication number: 20200320077Abstract: A system includes determination, for a first partitioned physical query operator in a query operator tree, of a partition-wise placement cost based on a cost of each table partition associated with the first partitioned physical query operator and a partition-wise placement cost of any child physical query operator of the first partitioned physical query operator, determination of a placement cost for the first partitioned physical query operator physical query operator for each of a plurality of operator execution locations based on the determined partition-wise placement cost, determination, for a logical query operator associated with the first partitioned physical query operator, of a merged placement cost for each of the plurality of operator execution locations, and determination an execution location for the first partitioned physical query operator based on the determined partition-wise placement cost.Type: ApplicationFiled: April 3, 2019Publication date: October 8, 2020Inventors: JunGyoung Seong, Jane Jung Lee, Jung Kook Lee, Sehee Shim
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Publication number: 20200320076Abstract: A system includes determination of a first partition-wise operation on a first database table partition of a first table located at a first server node and a first database table partition of a second table located at a second server node, determination of a first cost to execute the first partition-wise operation on the first server node, and a second cost to execute the first partition-wise operation on the second server node, determination of a second partition-wise operation on a result of the first partition-wise operation, determination of a third cost to execute the second partition-wise operation on the first server node based on the first cost and the second cost, and a fourth cost to execute the second partition-wise operation on the second server node based on the first cost and the second cost, determination of one of the first server node and the second server node to execute the second partition-wise operation based on the third cost and the fourth cost, and determination of one of the first serType: ApplicationFiled: April 3, 2019Publication date: October 8, 2020Inventors: JunGyoung Seong, Jane Jung Lee, Jung Kook Lee
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Publication number: 20200311076Abstract: Provided is a system and method for pruning partitions from a database access operation based on a dependency graph. In one example, the method may include generating a dependency graph for a partition-wise operation, the dependency graph comprising nodes representing partition candidates and links between the nodes identifying dependencies of the partition candidates, receiving, at runtime, a database query comprising a partition identifier, identifying a partition candidate that can be excluded from processing the database query based on the partition identifier, pruning a second partition candidate based on a dependency in the dependency graph between the excluded partition candidate and the second partition candidate, and performing a database access for the database query based on the pruning.Type: ApplicationFiled: April 12, 2019Publication date: October 1, 2020Inventors: Jung Kook Lee, Sang II Song
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Publication number: 20200311067Abstract: Provided is a system and method for pruning partitions from a database access operation based on a dependency graph. In one example, the method may include generating a dependency graph for a partition-wise operation, the dependency graph comprising nodes representing partition candidates and links between the nodes identifying dependencies of the partition candidates, receiving, at runtime, a database query comprising a partition identifier, identifying a partition candidate that can be excluded from processing the database query based on the partition identifier, pruning a second partition candidate based on a dependency in the dependency graph between the excluded partition candidate and the second partition candidate, and performing a database access for the database query based on the pruning.Type: ApplicationFiled: March 27, 2019Publication date: October 1, 2020Inventors: Jung Kook Lee, Sang II Song
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Patent number: 8354617Abstract: A coolant temperature control apparatus for a wet saw is provided, in which a coolant temperature controller is mounted on the wet saw to heighten the temperature of the coolant to a set temperature, and thus a tile cutting work can be efficiently performed even in cold weather below zero with the work continuity heightened. The coolant temperature control apparatus for a wet saw includes a support member on which a material to be cut is arranged, an electric cutting device cutting the material arranged on the support member, a coolant supply device cooling heat generated during operation of the electric cutting device, and a coolant temperature controller heightening the temperature of coolant stored in the coolant supply device.Type: GrantFiled: October 21, 2009Date of Patent: January 15, 2013Inventor: Jung Kook Lee
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Publication number: 20110089155Abstract: A coolant temperature control apparatus for a wet saw is provided, in which a coolant temperature controller is mounted on the wet saw to heighten the temperature of the coolant to a set temperature, and thus a tile cutting work can be efficiently performed even in cold weather below zero with the work continuity heightened. The coolant temperature control apparatus for a wet saw includes a support member on which a material to be cut is arranged, an electric cutting device cutting the material arranged on the support member, a coolant supply device cooling heat generated during operation of the electric cutting device, and a coolant temperature controller heightening the temperature of coolant stored in the coolant supply device.Type: ApplicationFiled: October 21, 2009Publication date: April 21, 2011Inventor: Jung Kook LEE
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Patent number: 7482935Abstract: The present application discloses a a baby health monitoring device comprising a skin temperature sensor connected to a microprocessor for mathematically converting the sensed temperature to corrected skin temperature; a movement sensor; a display screen for indicating condition of baby; and a means for communicating with a computer.Type: GrantFiled: October 28, 2003Date of Patent: January 27, 2009Inventor: Jung Kook Lee