Other

Fujitsu Corporation

Nippon Petrochemicals Company, Limited

Hiroyuki Hoshino

Kazuhiko Ikeuchi

Mikio Ito

Hidejiro Daikokuya

Yoshio Kitamura

Minoru Muramatsu

Satomi Mamiya

Shozo Hayashi

Takashi Kiyota

Yusuke Kurasawa

Kunio Sugisawa

Kenji Iwasawa

Masako Nishiyama

An information processing apparatus includes a volatile memory and a nonvolatile memory. An area setting unit sets, upon detection of an abnormality in the information processing apparatus, a work area in a storage area except a collection target area of investigation information used for investigation of a cause of the occurrence of the abnormality, in a storage area of the volatile memory. An information collection unit executes a procedure of collecting investigation information from the volatile memory and storing the same into the nonvolatile memory by using the set work area.

Information processing apparatus and information collection method

A RAID controller accesses an access request area on logical volumes distributed and stored on a plurality of physical disks according to a disk access request from a host. The controller has a plurality of management modules which are in-charge of plurality of the redundant groups respectively and issuing a logical format request for each area of said logical volume by referring to a management table for managing progress information of the logical format processing. Each management module has a plurality of the management table for being in-charge of said plurality of redundant groups and a queue for queuing the disk access request. The management module, according to the disk access request, judges whether all the access request areas have been logically formatted referring to the management table.

Raid controller and control method thereof

A storage controller executes logical format to enable host access to a physical disk, where the logical format of a physical disk is executed without waiting for host access. The storage controller comprises a logical format management module having bit map memory for managing progress information on format processing of a logical volume, and a lower layer module which accesses a physical disk according to the request of the management module. The management module judges whether all the access areas have been formatted referring to the bit map memory, requests the disk access to the lower layer module if judged as formatted, while, issues a logical format processing request before the disk access, queues the disk access request to the queue if not formatted, further searches the unformatted area from the bit map memory, and issues a logical format processing request if no disk access request exists in the queue.

Storage controller and control method thereof

Disclosed is a device for adjustable chirping in-fiber Bragg gratings comprising a straight beam of a longitudinally uniform cross-section, uniformly bent by an external force in a vertical plane including the axis of the beam, and an optical fiber provided with grating of uniform interval, or those having been chirped in advance at a predetermined rate of interval change, extending straight along said vertical plane in the beam when the beam is not loaded with the external force, from the top surface at one end to the bottom surface at the other end of the beam, penetrating on its way the neutral surface of the beam.

Device for adjustable chirping in-fiber Bragg gratings and method for producing same

A cooling medium and a cooling device for optical equipment using the same, which cooling medium has a refractive index in a specific range, hardly causes the problem to dissolve or swell plastic lens and other component parts, and is flame retardant. The cooling medium comprises a cyclic aliphatic hydrocarbon having at least one cross linkage and has a flash point of 120&deg; C. or above and a melting point of &minus;20&deg; C. or below. The space between a pair of transparent optical members of a cooling device for optical equipment, is filled with the cooling medium.

Cooling medium for optical equipment and cooling device using the same

Disclosed is a method for producing a chirped in-fiber Bragg grating, in which an interval between gratings varies continuously depending on a location of the gratings observed along an optical fiber, comprising a first step of winding the optical fiber in a spiral groove formed around a conical bobbin which is shaped in a frustum of a right circular cone having a predetermined vertex angle and a height between predetermined first and second diameters, and a second step of irradiating the optical fiber wound on the conical bobbin with ultraviolet rays at every crossing of the optical fiber with a predetermined number of uniformly distributed generating lines of the conical bobbin, each extending radially on the surface of the conical bobbin from an imaginary vertex thereof, for modifying the refractive index of a core of the optical fiber to form the grating at the every crossing.

Growing community of inventors

Kawasaki, Japan

Hiroyuki Hoshino