Abstract: In a system manages a plurality of pieces of sensor information in a plant, or the like, it can be reducing an amount of data stored in a database and easily a processing for searching a place of an anomaly and an anomaly cause. A database management method for use in a computer for managing a database, the database management method including: a step of analyzing a query; a step of generating a first inquiry for searching the database for compressed data; a step of generating a second inquiry for executing a search of time-series data; a step of extracting given data from the obtained time-series data, based on a response result of the second inquiry; and a step of generating an output result by extracting data to be output to a client computer from the given data.

Abstract: Provided is a database processing system including: a computer for outputting data in response to a received query request; and a storage system including a storage device for storing the data, in which: the storage device stores a plurality of partial indices indicating a storage location of the data; the data stored in the storage device is grouped; and the computer is configured to: receive the query request for the data; acquire one of the plurality of partial indices; specify, based on the query request for the data and the acquired one of the plurality of partial indices, a location at which the requested data is stored; and send a request to acquire the data stored at the specified location to the storage system. Accordingly, in the database processing system, a time period necessary to input and output the data is shortened.

Abstract: A method for producing an ? alumina sintered body for the production of a sapphire single crystal characterized in that a relative density is 60% or more, a closed porosity is 10% or less, a purity is 99.99% by mass or more, each content of Si, Na, Ca, Fe, Cu and Mg is 10 ppm or less, and a volume is 1 cm3 or more, and the ? alumina sintered body can be obtained by mixing 100 parts by weight of an ? alumina with 1 part by weight or more and 20 parts by weight or less of an ? alumina precursor to obtain a mixture, forming a compact from the obtained mixture, and firing the obtained compact.

Abstract: According to this invention, a data arrangement method, the computer connected to a storage system which provides a plurality of logical storage devices comprising a plurality of physical storage devices arranges data in a logical storage volume constructed by integrating the plurality of logical storage devices. The method includes: a step wherein the computer receives an instruction to build the logical storage volume using the plurality of logical storage devices or to rebuild the constructed logical storage volume; a step wherein the computer obtains information about the plurality of physical storage devices constituting each of the plurality of logical storage devices included in the received instruction; and a step wherein the arrangement position of data into the logical storage volume is determined on the basis of the obtained information about the plurality of physical storage devices.

Abstract: To generate backup data based on a log while a power consumption of a standby system is reduced, method for data backup is provided in which a first computer system transmits a data update record, a second storage system of a second computer system receives and then stores the data update record, and a second computer of the second computer system generates a copy of data contained in the first computer system based on the stored data update record. The method for data backup includes monitoring the data update record transmitted by the first computer system, and stopping, when a predetermined first condition is satisfied, the second computer; and starting, when a predetermined second condition is satisfied, the second computer, thereby generating the copy of the data contained in the first computer system based on the stored data update record.

Abstract: A user specifies a group by a user-defined query. An input order is assured among data of a same group. By outputting data belonging to a same group from the same node, an order inputted for a necessary portion is assured. By outputting data belonging to different groups from another node, processing in plural nodes is achieved to avoid reduction in performance.

Abstract: ?-Alumina powder having a purity of at least 99.99% by weight, a specific surface area of from 0.1 to 2.0 m2/g, a relative density of from 55 to 90%, and a closed porosity of 4% or less, wherein in a weight-based particle size distribution obtained by the dry sieving test according to JIS K0069 (1992), an amount of particles having a particle size of less than 75 ?m is 5% by weight or less; an amount of particles having a particle size exceeding 2.8 mm is 15% by weight or less; and at least one frequency maximum peak appears in a particle size range of 100 ?m or more and to less than 850 ?m. This ?-alumina powder can be charged in a crucible at a high bulk density, from which sapphire having a few voids can be produced without causing the oxidation of a crucible in a heat melting step.

Abstract: A technology capable of preventing a problem which occurs when log writing of a preceding transaction fails while reducing waiting time of a subsequent transaction is provided. A database control method for releasing locking of data held by a transaction upon reception of a transaction completion instruction from an operation terminal or the like by a database is provided. The database includes an exclusive control module, a log output module, and a log buffer. The log output module stores a transaction completion log in the log buffer upon reception of the transaction completion instruction from the operation terminal. The exclusive control module releases locking held by the transaction upon reception of storage of the transaction completion log in the log buffer.

Abstract: There is provided a process for the preparation of a alumina precursor powder from aluminum hydroxide powder obtained by hydrolysis of aluminum alkoxide which precursor enables to provide alumina powder with a high volumetric efficiency. Such process comprises mixing aluminum hydroxide powder obtained by hydrolysis of an aluminum alkoxide with the following aqueous medium so as to obtain an aluminum hydroxide mixed slurry and then drying the aluminum hydroxide mixed slurry: aqueous medium: water or a medium mixture of water and a water-soluble alcohol wherein a water content in said medium mixture is not less than 15 parts by weight to 100 parts by weight of the medium mixture.

Abstract: A shared-nothing database management system employs a method of adding and removing a database server without significantly affecting the processing performance for accessing a table from a user or an application. A scheduler module creates a schedule which separately handles the addition of a CPU resource and the addition of a storage I/O resource, and a server is added in accordance with the created schedule. A common disk is used to remove a disk at an arbitrary timing. Further, a data region is previously subdivided on the common disk to eliminate a movement of data associated with the addition of a server.

Abstract: An object of the present invention is to provide a alumina for the production of a sapphire single crystal, capable of producing a sapphire single crystal with high production efficiency; and a method for producing the same. Disclosed are ? alumina for the production of a sapphire single crystal, including 100 parts by weight of ? alumina (I) and 25 to 235 parts by weight of ? alumina (II), wherein the ? alumina (I) has a specific surface area of 0.1 to 5 m2/g and a bulk density of 1.5 g/cm3 or more, the ? alumina (II) is composed of sintered particles and also has a specific surface area of 1 m2/g or less and a relative density of 85% or more, and each of the body particles has a volume of 0.01 cm3 or more; and a method for producing the same.

Abstract: An inorganic oxide powder suited to form an inorganic oxide porous film having insulating properties on a surface of at least one of a positive electrode, a negative electrode and a separator which are used configure a lithium ion secondary battery is provided. Disclosed is an inorganic oxide powder used to form an inorganic oxide porous film having insulating properties on a surface of at least one of a positive electrode, a negative electrode and a separator used in a lithium ion secondary battery, wherein (1) oxide purity is 90% by weight or more, (2) the content of coarse particles having a particle diameter of 10 ?m or more is 10 ppm or less in terms of a mass ratio, and (3) porosity of a green formed body of the inorganic oxide powder prepared under a pressure within a range of 29 MPa or more and 147 MPa or less is 40% by volume or more and 80% by volume or less, an average pore diameter of the green formed body is 0.

Abstract: A stream data processing system capable of highly reliable and highly usable real time data processing, is provided with: (1) a mechanism of copying some or all of stream data, and archiving the stream data in a non-volatile memory to allow real time data and archive data to be used seamlessly; and (2) a mechanism of improving the performance of query processings by using a plurality of stream data processing systems cooperatively.

Abstract: Since ?-alumina particles have low bulk density, there is such a problem that a production efficiency of single crystal sapphire is not enough. The present invention provides an ?-alumina for producing single crystal sapphire, wherein its volume per one ?-alumina particle is not less than 0.01 cm3, and its relative density is not less than 80%, and its bulk density of aggregate is in the range of 1.5 to 2.3 g/cm3.

Abstract: To reduce operational and management costs during normal operations while recovering a database without loss and maintaining on-line performance on a site. A first system includes a primary storage system (103) that stores a DB (107) and a main computer (100) that executes a primary DBMS (101), which provides a DB. A second system includes a secondary (113) that receives from the primary storage system (103) a copy of a log, which shows update differences of the DB (107), and stores a secondary DBMS (117), and a subset (500) that recovers the secondary DB (117) according to the log that is copied from the primary storage system (103). When a failure occurs in the first system, the first system is switched to the second system. A second computer (110) that executes a second DBMS (111) is added to the second system, and the secondary DB (117) that is recovered or is being recovered in the subset (500) is taken over to the second computer (110).

Abstract: A user specifies a group by a user-defined query. An input order is assured among data of a same group. By outputting data belonging to a same group from the same node, an order inputted for a necessary portion is assured. By outputting data belonging to different groups from another node, processing in plural nodes is achieved to avoid reduction in performance.

Abstract: A technology for verifying backup data capable of synchronizing timings of checksum calculation and verifying data consistency regardless of the storing position of the data is provided. In a backup system using a data update log, a checksum of data of a backup source and a checksum of backup data are checked, thereby verifying data consistency. Data check log generation means and the like are provided so that the data update log and the data check log are transmitted in order to a secondary site. By this means, the timings of the checksum calculation are synchronized. Further, by providing data area extraction means and the like, the verification of data consistency can be performed regardless of the storing position of the data.

Abstract: In executing query distributed processing in a computer system having a plurality of computers, a query and a sliding window are inherited between different computers. If a tuple having a new principal key value is detected when a query is to be executed, a relevant individual query and a relevant sliding window are inherited between computers, and further a sliding window of a relevant common query is inherited between computers.

Abstract: In a DR system, from the viewpoint of device cost, when search is not carried out, a physical application where log recovery is available by inexpensive DB appliance server is adopted. Further, a local mirror operation at a secondary site is not carried out. Furthermore, from the viewpoint of operation, by a log apply function unit, the tendencies of a log application and operations are monitored, and a search process is accepted according to the progress conditions of the log application. When the log application does not catch up sufficiently, the search is not accepted. Moreover, when a consistency guarantee of a secondary DB is made, not transactions in process at the moment of search instruction are undone (rolled back), but only transactions in process at the moment of a search instruction are redone (rolled forward).

Abstract: Provided is a database processing system including: a computer for outputting data in response to a received query request; and a storage system including a storage device for storing the data, in which: the storage device stores a plurality of partial indices indicating a storage location of the data; the data stored in the storage device is grouped; and the computer is configured to: receive the query request for the data; acquire one of the plurality of partial indices; specify, based on the query request for the data and the acquired one of the plurality of partial indices, a location at which the requested data is stored; and send a request to acquire the data stored at the specified location to the storage system. Accordingly, in the database processing system, a time period necessary to input and output the data is shortened.