Patents by Inventor Atsushi Itagaki
Atsushi Itagaki 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).
-
Publication number: 20240143221Abstract: A computer implemented method includes executing a read-ahead operation by reading data from a tape according to a read plan and storing said data in a ring buffer, determining whether the ring buffer is full, receiving a command indicating an area to be read according to the read plan, and, responsive to receiving the command, reading data from an area of the list of areas to be read corresponding to the command from the ring buffer. The method may further include executing additional read-ahead operations until the ring buffer is full. A computer program product and computer system corresponding to the method are also disclosed.Type: ApplicationFiled: October 28, 2022Publication date: May 2, 2024Inventors: Atsushi Abe, Tohru Hasegawa, Shinsuke Mitsuma, Hiroshi Itagaki, Tsuyoshi Miyamura, Noriko Yamamoto
-
Patent number: 11971853Abstract: An approach for deleting a file from a primary file system. The approach deletes a directory entry, associated with a file, from an in-memory index associated with a secondary file system. The approach updates an index cache associated with a secondary file system, based on the in-memory index. The approach updates a dirty flag, associated with the secondary file system, to a value of TRUE.Type: GrantFiled: September 30, 2022Date of Patent: April 30, 2024Assignee: International Business Machines CorporationInventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Atsushi Abe, Noriko Yamamoto, Shinsuke Mitsuma
-
Patent number: 11954353Abstract: In an approach to improve magnetic tape file systems through tape-to-tape copying between nodes on a Linear Tape File System using a cluster-wide named pipe. Embodiments transfer data between a first node and a second node. Additionally, both the first node and the second node implement a parallel shared-disk file system through a data path for node data reading and writing from a shared-disk and to the shared-disk. Further, to transfer data between the first node and the second node, embodiments, write, by the first node, the data for tape-to-tape copy from a first tape drive to the shared-disk, and write, by the second node, the data written from the shared-disk to a second tape drive.Type: GrantFiled: September 24, 2021Date of Patent: April 9, 2024Assignee: International Business Machines CorporationInventors: Atsushi Abe, Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Shinsuke Mitsuma, Noriko Yamamoto
-
Publication number: 20240111721Abstract: An approach for deleting a file from a primary file system. The approach deletes a directory entry, associated with a file, from an in-memory index associated with a secondary file system. The approach updates an index cache associated with a secondary file system, based on the in-memory index. The approach updates a dirty flag, associated with the secondary file system, to a value of TRUE.Type: ApplicationFiled: September 30, 2022Publication date: April 4, 2024Inventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Atsushi Abe, Noriko Yamamoto, Shinsuke Mitsuma
-
Publication number: 20240094949Abstract: A computer implemented method includes receiving a list of areas on a subject tape to be read, wherein each area of the list of areas is indicated by a first record number and a last record number corresponding to the area, identifying parameters of a tape drive configured to read the subject tape, wherein the identified parameters of the tape drive contribute to a speed with which the tape drive can read the list of areas, creating a directed graph of the areas on the subject tape based on the identified parameters, wherein the directed graph indicates how long the tape drive will take to read the areas on the subject tape, and determining a fastest reading order of the areas on the subject tape, based, at least in part, on the directed graph and the identified parameters. A computer program product and computer system are also disclosed.Type: ApplicationFiled: September 15, 2022Publication date: March 21, 2024Inventors: Atsushi Abe, Tohru Hasegawa, Shinsuke Mitsuma, Hiroshi Itagaki, Noriko Yamamoto, Tsuyoshi Miyamura, Lucas Correia Villa Real
-
Patent number: 11934699Abstract: A computer-implemented method for unoptimized tape drive read detection is disclosed. The computer-implemented includes determining whether a read order of a trio of related files is consistent with an order in which the trio of related files are stored on a magnetic tape media. The computer-implemented method further includes generating an unoptimized tape drive read warning in response to determining that the read order of the trio of related files is inconsistent with the order in which the trio of related files are stored on the magnetic tape media.Type: GrantFiled: March 21, 2022Date of Patent: March 19, 2024Assignee: International Business Machines CorporationInventors: Tohru Hasegawa, Hiroshi Itagaki, Tsuyoshi Miyamura, Atsushi Abe, Shinsuke Mitsuma, Noriko Yamamoto
-
Patent number: 11914883Abstract: A copy operation is received. The copy operation is of one or more files stored on a linear tape file system. The copy operation is performed in a plurality of units of extents of the one or more files.Type: GrantFiled: March 4, 2022Date of Patent: February 27, 2024Assignee: International Business Machines CorporationInventors: Shinsuke Mitsuma, Tsuyoshi Miyamura, Hiroshi Itagaki, Tohru Hasegawa, Noriko Yamamoto, Atsushi Abe
-
Patent number: 11618699Abstract: An object is to provide a degrading bacteria-immobilized carrier on which a 1,4-dioxane-degrading bacterium is supported, as well as a biodegradation treatment method for organic compounds, and a biodegradation treatment apparatus, both using this carrier. As a means for achieving the object, a degrading bacteria-immobilized carrier comprising a porous carrier and a 1,4-dioxane-degrading bacterium supported on the porous carrier, as well as a biodegradation treatment method for organic compounds, and a biodegradation treatment apparatus, both using this carrier, are provided.Type: GrantFiled: October 15, 2018Date of Patent: April 4, 2023Assignees: TAISEI CORPORATION, ORGANO CORPORATIONInventors: Norifumi Yamamoto, Jun Kusaka, Atsushi Itagaki, Kazuichi Isaka, Yutaka Tsuda, Masahiro Eguchi
-
Publication number: 20200354244Abstract: An object is to provide a degrading bacteria-immobilized carrier on which a 1,4-dioxane-degrading bacterium is supported, as well as a biodegradation treatment method for organic compounds, and a biodegradation treatment apparatus, both using this carrier. As a means for achieving the object, a degrading bacteria-immobilized carrier comprising a porous carrier and a 1,4-dioxane-degrading bacterium supported on the porous carrier, as well as a biodegradation treatment method for organic compounds, and a biodegradation treatment apparatus, both using this carrier, are provided.Type: ApplicationFiled: October 15, 2018Publication date: November 12, 2020Inventors: Norifumi YAMAMOTO, Jun KUSAKA, Atsushi ITAGAKI, Kazuichi ISAKA, Yutaka TSUDA, Masahiro EGUCHI
-
Publication number: 20150115949Abstract: A magnetic sensor having a large magnetic-field detection angle range and a bridge circuit used in the magnetic sensor, in each of multiple MR elements in the bridge circuit, multiple strips, on the whole, along a direction substantially orthogonal to a magnetic-field detection direction are arranged in parallel at certain intervals and are sequentially connected so as to be folded back and, in each of the multiple strips, multiple strips along the magnetic-field detection direction are arranged in parallel at certain intervals and are sequentially connected so as to be folded back to form a zigzag pattern in which the multiple strips are electrically connected in series to each other.Type: ApplicationFiled: October 30, 2014Publication date: April 30, 2015Inventor: ATSUSHI ITAGAKI
-
Patent number: 9003819Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, an utilization-side heat exchanger, a first expansion valve, and an outdoor heat exchanger; an injection pipe which includes a solenoid switching valve and a second expansion valve; and an objective supercooling degree table which stores objective supercooling degrees according to condensing pressure in the refrigerant circuit and rotation number of the compressor. In the heat pump apparatus, liquid refrigerant is injected to the compressor by way of the injection pipe. The heat pump apparatus switches between a first case where the liquid refrigerant is injected to the compressor and a second case where the liquid refrigerant is not injected, and a value of the objective supercooling degree is changed between the first case and the second case to control the first expansion valve based on the value of the objective supercooling degree.Type: GrantFiled: September 24, 2010Date of Patent: April 14, 2015Assignee: Fujitsu General LimitedInventors: Atsushi Itagaki, Takashi Sugiyama, Toshiyuki Fuji
-
Patent number: 8978402Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, a utilization-side heat exchanger for exchanging heat between water and refrigerant, an electronic expansion valve, and an outdoor heat exchanger; a controller which controls the compressor and the electronic expansion valve; a subcooling value calculating unit which calculates a subcooling value of the refrigerant circuit; a condensing pressure detector which detects condensing pressure of the compressor; a compressor rotation number detector which detects rotation number of the compressor; and an objective subcooling value extracting unit which selects and extracting an objective subcooling value stored in advance, from the condensing pressure and the rotation number of the compressor. The controller adjusts an opening degree of the electronic expansion valve so that the calculated subcooling value of the refrigerant circuit reaches the objective subcooling value.Type: GrantFiled: September 24, 2010Date of Patent: March 17, 2015Assignee: Fujitsu General LimitedInventors: Atsushi Itagaki, Takashi Sugiyama, Toshiyuki Fuji, Hiroshi Abiko
-
Patent number: 7987680Abstract: Between two heat exchangers of a first heat exchanger unit 41 and a second heat exchanger unit 42 included in an indoor heat exchanger 40, an opening 80 is arranged for introducing indoor air sucked from an air inlet 321 into an indoor blower 50 without being heat-exchanged. At the opening 80, a damper 91 is arranged for adjusting the opening rate of the opening 80, which is driven by a predetermined driving member 92. During a cooling cycle running of a freezing cycle, the opening rate of the opening 80 and/or the devices included in the freezing cycle such as a compressor, blower and expansion valve are controlled alone or in combination so that the temperature of the indoor heat exchanger 40 is lower than a dew point temperature of the indoor air.Type: GrantFiled: October 11, 2006Date of Patent: August 2, 2011Assignee: Fujitsu General LimitedInventors: Mamoru Hamada, Hiroki Igarashi, Atsushi Itagaki, Takafumi Arima, Hiroaki Watanuki, Yoshihiro Sasaki, Masamitsu Usui
-
Publication number: 20110072839Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, a utilization-side heat exchanger for exchanging heat between water and refrigerant, an electronic expansion valve, and an outdoor heat exchanger; a controller which controls the compressor and the electronic expansion valve; a subcooling value calculating unit which calculates a subcooling value of the refrigerant circuit; a condensing pressure detector which detects condensing pressure of the compressor; a compressor rotation number detector which detects rotation number of the compressor; and an objective subcooling value extracting unit which selects and extracting an objective subcooling value stored in advance, from the condensing pressure and the rotation number of the compressor. The controller adjusts an opening degree of the electronic expansion valve so that the calculated subcooling value of the refrigerant circuit reaches the objective subcooling value.Type: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Applicant: FUJITSU GENERAL LIMITEDInventors: Atsushi ITAGAKI, Takashi SUGIYAMA, Toshiyuki FUJI, Hiroshi ABIKO
-
Publication number: 20110072840Abstract: A heat pump apparatus includes: a refrigerant circuit which includes a compressor, an utilization-side heat exchanger, a first expansion valve, and an outdoor heat exchanger; an injection pipe which includes a solenoid switching valve and a second expansion valve; and an objective supercooling degree table which stores objective supercooling degrees according to condensing pressure in the refrigerant circuit and rotation number of the compressor. In the heat pump apparatus, liquid refrigerant is injected to the compressor by way of the injection pipe. The heat pump apparatus switches between a first case where the liquid refrigerant is injected to the compressor and a second case where the liquid refrigerant is not injected, and a value of the objective supercooling degree is changed between the first case and the second case to control the first expansion valve based on the value of the objective supercooling degree.Type: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Applicant: FUJITSU GENERAL LIMITEDInventors: Atsushi ITAGAKI, Takashi SUGIYAMA, Toshiyuki FUJI
-
Patent number: 7554226Abstract: A magnetic pre-pressurizing section for pre-pressurizing the inner ring of the bearing in the axial direction by a difference of magnetic forces of permanent magnets of the two rotors is arranged. The magnetic pre-pressurizing section is constructed by a difference of a magnetizing amount for forming permanent magnets 8b, 9b arranged in the respective rotors. The magnetic pre-pressurizing section is also constructed by a difference of distances of an air gap L1 of a stator 2 and a permanent magnet 8b1, and an air gap L2 of the stator 2 and a permanent magnet 9b1. The magnetic pre-pressurizing section is also constructed by a difference of thicknesses of the rotating axis direction of a permanent magnet 8b1 and a permanent magnet 9b2 arranged in the respective rotors.Type: GrantFiled: June 2, 2006Date of Patent: June 30, 2009Assignee: Fujitsu General LimitedInventors: Tomonori Kojima, Atsushi Itagaki, Masanori Murakami, Yoichi Tanabe, Toshiaki Tanno, Hirokazu Matsuzaki, Masaki Yamada
-
Publication number: 20070079619Abstract: Between two heat exchangers of a first heat exchanger unit 41 and a second heat exchanger unit 42 included in an indoor heat exchanger 40, an opening 80 is arranged for introducing indoor air sucked from an air inlet 321 into an indoor blower 50 without being heat-exchanged. At the opening 80, a damper 91 is arranged for adjusting the opening rate of the opening 80, which is driven by a predetermined driving member 92. During a cooling cycle running of a freezing cycle, the opening rate of the opening 80 and/or the devices included in the freezing cycle such as a compressor, blower and expansion valve are controlled alone or in combination so that the temperature of the indoor heat exchanger 40 is lower than a dew point temperature of the indoor air.Type: ApplicationFiled: October 11, 2006Publication date: April 12, 2007Applicant: FUJITSU GENERAL LIMITEDInventors: Mamoru Hamada, Hiroki Igarashi, Atsushi Itagaki, Takafumi Arima, Hiroaki Watanuki, Yoshihiro Sasaki, Masamitsu Usui
-
Publication number: 20060279150Abstract: A magnetic pre-pressurizing section for pre-pressurizing the inner ring of the bearing in the axial direction by a difference of magnetic forces of permanent magnets of the two rotors is arranged. The magnetic pre-pressurizing section is constructed by a difference of a magnetizing amount for forming permanent magnets 8b, 9b arranged in the respective rotors. The magnetic pre-pressurizing section is also constructed by a difference of distances of an air gap L1 of a stator 2 and a permanent magnet 8b1, and an air gap L2 of the stator 2 and a permanent magnet 9b1. The magnetic pre-pressurizing section is also constructed by a difference of thicknesses of the rotating axis direction of a permanent magnet 8b1 and a permanent magnet 9b2 arranged in the respective rotors.Type: ApplicationFiled: June 2, 2006Publication date: December 14, 2006Applicant: FUJITSU GENERAL LIMITEDInventors: Tomonori Kojima, Atsushi Itagaki, Masanori Murakami, Yoichi Tanabe, Toshiaki Tanno, Hirokazu Matsuzaki, Masaki Yamada
-
Patent number: 6184693Abstract: A first substrate having a first electromagnetic noise sensor on its surface perpendicularly intersects with a second substrate having a second electromagnetic noise sensor on its surface, making up an integral structure. A first induced voltage value output from the first electromagnetic sensor at a position thereof directly before driving by a driving means is recorded, and a second induced voltage value output from the second electromagnetic noise sensor at a position thereof at a time of movement of the integral structure for only a predetermined distance by a driving means is recorded. Further, the first and second electromagnetic noise sensors are parallel connected at the position of movement, and a third induced voltage value output from a parallel connected electromagnetic noise sensor is also recorded. Based on the recorded first and second voltage values, an electromagnetic noise level in a vicinity of the integral substrate is determined.Type: GrantFiled: July 9, 1998Date of Patent: February 6, 2001Assignee: Kyodo Kumiai Joint-Labo SendaiInventors: Kenichi Arai, Masahiro Yamaguchi, Shin Yabukami, Atsushi Itagaki, Mitsuharu Watanabe, Kiichi Itagaki, Noboru Saito, Koichi Fuda, Hiroshi Takahashi, Takashi Tamogami, Yukio Sakurada
-
Patent number: 5906107Abstract: An air conditioner comprises a freezing cycle circuit, which includes, successively provided on a main duct line 11 in the mentioned order, a compressor 10, a four-way valve 12, an external heat exchanger 13, a pressure reducer 14, and an internal heat exchanger 11, the main duct line 11 branching into at least an upper and a lower part coolant flow line 20 and 30 in the internal heat exchanger 15, and an on-off valve 10 provided on the upper part coolant flow line 20 and closed in a low capacity cooling operation. The air conditioner can gently cool and gently dry air in a room without causing chillness to be felt.Type: GrantFiled: May 1, 1997Date of Patent: May 25, 1999Assignee: Fujitsu General LimitedInventors: Tomomi Takahashi, Atsushi Itagaki, Hiroki Igarashi