Oki Electric Industry Co., Ltd.

Nichias Corporation

Akifumi Sakamoto

Hideki Yamamoto

Suguru Kawakami

Hiromi Haniuda

Yoshihiko Goto

Ken Maeda

Yasuo Ito

Sadayuki Hikita

Sakayuki Hikita

A thermal insulator with both excellent heat insulation and strength and a method of manufacturing the thermal insulator are provided. A thermal insulator according to the present invention includes metal oxide fine particles with an average particle diameter equal to or smaller than 50 nm and a reinforcing fiber, wherein the thermal insulator has a bridge structure between the metal oxide fine particles which is formed by elution of part of the metal oxide fine particles. A method of manufacturing a thermal insulator according to the present invention includes a curing step of curing a dry pressed compact including metal oxide fine particles with an average particle diameter equal to or smaller than 50 nm and a reinforcing fiber under a pressurized vapor saturated atmosphere at a temperature equal to or higher than 100&#xb0; C. for four hours and a drying step of drying the cured dry pressed compact.

Thermal insulator and method of manufacturing the same

The present invention provides a heat-resistant material for a low-melting metal casting machine, which comprises calcium silicate and a fluoride.

Heat-resistant material for low-melting metal casting machine

A database processing device executes concurrent processing in accessing a database through a plurality of independent terminal units. The database processing device, upon updating data stored in a record after reading out the data stored in the record in the database and correcting or altering the data through a specific terminal, confirms whether or not the data stored in the record has been updated by terminals, and executes updating only when the data has not been updated. The data stored in the record includes update control information for confirming whether or not the data has been updated by other terminals.

Database processing device

A join operation processing system and a method of operating the system is usable in a distributed database management system including multiple local database management systems, computers employing distributed databases stored in the local database management systems, and a communication network for connecting said local database management systems and the computers. The join operation processing system can perform a join operation on a relational database. Each of the computers instructs prior computer to performing the join operation, and the database management system, managing relations associated with the join operation to read definitions so as to define said relations, reads the read definitions to thereby determine a process to process the join operation, and issues a request to the prescribed database management system to perform join operation processing based on the determination. Each database management system transfers a local processing result and a local processing request among the database management systems and performs the join operation processing in a pipe line processing sequence.

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Tokyo, Japan

Akifumi Sakamoto