Abstract: A method for intelligent query plan cache size management can be implemented. During execution of a plurality of incoming queries in a database management system, the method can measure actual compilation times of generating query execution plans for the plurality of incoming queries. The database management system can have a query execution plan cache which has a size that can store at least some of the query execution plans. The method can monitor differences between the actual compilation times and ideal compilation times of generating query execution plans for the plurality of incoming queries. The ideal compilation times can be estimated by assuming no query execution plan is evicted from the query execution plan cache. The method can adjust the size of the query execution plan cache based on the monitored differences.

Abstract: A battery module includes a plurality of pouch-type battery cells respectively having an accommodation portion and a sealing portion and configured to be stacked on each other; a module case configured to accommodate the plurality of pouch-type battery cells in an inner space thereof; and a barrier member interposed between the accommodation portions of neighboring pouch-type battery cells and configured to have at least one side protrusively extending from a portion between the accommodation portions of the neighboring pouch-type battery cells to a portion between the sealing portions of the neighboring pouch-type battery cells.

Abstract: A substrate processing apparatus includes: a conveyor belt configured to have an outer surface on which a bottom surface of a substrate is seated; and a polishing head unit configured to face an upper surface of the substrate, wherein the polishing head unit includes: a polishing head connected to a driver; a polishing pad configured to face the polishing head; a polishing pad fixing ring disposed between the polishing head and the polishing pad; and a temperature sensor configured to overlap the polishing pad fixing ring and to be spaced apart from the polishing pad fixing ring.

Abstract: An insulation resistance measurement apparatus includes a first resistance unit having one end connected to an anode of a battery and the other end connected ground, and variably having a first resistance value or a second resistance value greater than the first resistance value; a second resistance unit having one end connected to a cathode of the battery and the other end connected to ground, and variably having a third resistance value or a fourth resistance value greater than the third resistance value; a voltage measurement unit configured to measure a voltage across the first or second resistance unit; and an insulation resistance calculation unit configured to calculate a first insulation resistance value between the anode of the battery and ground and a second insulation resistance value between the cathode of the battery and ground by using the first to fourth resistance values and the measured voltage.

Abstract: Disclosed is a battery distributing apparatus for efficiently using and distributing a plurality of exchange-type batteries. The battery distributing apparatus includes a battery determining module for determining a level of each battery for a plurality of batteries; a user determining module for determining a grade of each user who uses at least one battery among the plurality of batteries; and a selecting module for selecting a battery suitable for a requester who requests to use at least one battery among the plurality of batteries, based on the grade of the user determined by the user determining module and the level of the battery determined by the battery determining module.

Abstract: The present application relates to: a novel mutant polypeptide having isopropylmalate synthase activity; and a method for producing L-leucine by using same. L-leucine can be produced at high yield by using the mutant polypeptide according to an embodiment.

Abstract: A computer-implemented method can measure query locality during execution of a plurality of incoming queries in a database management system. The database management system includes a query execution plan cache which has a size that can store at least some of query execution plans generated for the plurality of incoming queries. Based on the measured query locality, the method can adjust the size of the query execution plan cache.

Abstract: A computer-implemented method can measure query locality during execution of a plurality of incoming queries in a database management system. The database management system includes a query execution plan cache which has a size that can store at least some of query execution plans generated for the plurality of incoming queries. Based on the measured query locality, the method can adjust the size of the query execution plan cache.

Abstract: A method for intelligent query plan cache size management can be implemented. During execution of a plurality of incoming queries in a database management system, the method can measure actual compilation times of generating query execution plans for the plurality of incoming queries. The database management system can have a query execution plan cache which has a size that can store at least some of the query execution plans. The method can monitor differences between the actual compilation times and ideal compilation times of generating query execution plans for the plurality of incoming queries. The ideal compilation times can be estimated by assuming no query execution plan is evicted from the query execution plan cache. The method can adjust the size of the query execution plan cache based on the monitored differences.

Abstract: According to some embodiments, a system to manage a query plan cache for a Database Management System (“DBMS”) includes a DBMS query plan cache data store. The DBMS query plan cache data store may contain, for example, electronic records representing a plurality of query plans each associated with a set of instructions created in response to a query previously submitted by a user. A DBMS query plan cache management platform may then calculate a utility score for each query plan in the DBMS query plan cache data store. At least one query plan may be evicted from the DBMS query plan cache data store based on the calculated utility score, wherein the evicting is not based on a size of the DBMS query plan cache.

Abstract: Discussed is a battery management apparatus which includes a battery management system that monitors a state of a battery, and a power receiving device that wirelessly receives power from a power transmitting device, where the battery management system calculates an optimum charging condition for the battery based on data on the state of the battery and power transmission performance of the power transmitting device.

Abstract: The present invention relates to a method of turning on an electric scooter by supplying power to the ECU when the interchangeable battery pack is driven by eliminating the auxiliary battery that always supplies power to the ECU that turns on the start of the electric scooter, providing an interchangeable battery packs using wireless communication type, and using a wireless communication signal received from a smart device as a driving signal of the interchangeable battery pack.

Abstract: A battery pack power cutting off apparatus is discussed, and includes a power cutoff configured to block a line through which a charge/discharge current of a battery module flows, a communicator configured to receive an operation signal of the power cutoff from an external device, and a switching configured to control to apply power to a heater resistor included in the power cutoff based on an operation signal of the power cutoff, wherein when power is applied to the heater resistor and generates heat, the power cutoff operates to block the current flowing through the line.

Abstract: Provided are a microorganism producing an L-amino acid or a precursor thereof, and a method of producing an L-amino acid or a precursor thereof using the microorganism.

Abstract: The present disclosure relates to a polypeptide having an acyltransferase activity or a microorganism including the same; a composition for preparing N-acetyl-L-methionine, the composition including the polypeptide or microorganism; and a method of preparing N-acetyl-L-methionine using the polypeptide or microorganism. Further, the present disclosure relates to a polynucleotide encoding the polypeptide and an expression vector including the polynucleotide. Since the microorganism including a novel acyltransferase according to the present disclosure has enhanced acyltransferase activity, this microorganism can be efficiently used for producing N-acetyl-L-methionine by acetylating L-methionine.

Abstract: An insulation resistance measurement apparatus includes a first resistance unit having one end connected to an anode of a battery and the other end connected to ground, and variably having a first resistance value or a second resistance value greater than the first resistance; a second resistance unit having one end connected to a cathode of the battery and the other end connected to ground, and variably having a third resistance value or a fourth resistance value greater than the third resistance value according to control; a voltage measurement unit configured to measure a voltage across the first or second resistance unit; and an insulation resistance calculation unit configured to calculate a first insulation resistance value between the anode of the battery and ground and a second insulation resistance value between the cathode of the battery and ground by using the first to fourth resistance values and the measured voltage.

Abstract: According to some embodiments, a system to manage a query plan cache for a Database Management System (“DBMS”) includes a DBMS query plan cache data store. The DBMS query plan cache data store may contain, for example, electronic records representing a plurality of query plans each associated with a set of instructions created in response to a query previously submitted by a user. A DBMS query plan cache management platform may then calculate a utility score for each query plan in the DBMS query plan cache data store. At least one query plan may be evicted from the DBMS query plan cache data store based on the calculated utility score, wherein the evicting is not based on a size of the DBMS query plan cache.

Abstract: According to some embodiments, a system to manage a query plan cache for a Database Management System (“DBMS”) includes a DBMS query plan cache data store. The DBMS query plan cache data store may contain, for example, electronic records representing a plurality of query plans each associated with a set of instructions created in response to a query previously submitted by a user. A DBMS query plan cache management platform may then calculate a utility score for each query plan in the DBMS query plan cache data store. At least one query plan may be evicted from the DBMS query plan cache data store based on the calculated utility score, wherein the evicting is not based on a size of the DBMS query plan cache.

Abstract: According to some embodiments, a system to manage a query plan cache for a Database Management System (“DBMS”) includes a DBMS query plan cache data store. The DBMS query plan cache data store may contain, for example, electronic records representing a plurality of query plans each associated with a set of instructions created in response to a query previously submitted by a user. A DBMS query plan cache management platform may then calculate a utility score for each query plan in the DBMS query plan cache data store. At least one query plan may be evicted from the DBMS query plan cache data store based on the calculated utility score, wherein the evicting is not based on a size of the DBMS query plan cache.

Abstract: The present disclosure relates to a putrescine-producing microorganism of the genus Corynebacterium, and a method of producing putrescine using the same.