Patents by Inventor Takao Sakurai
Takao Sakurai 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).
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Patent number: 9247025Abstract: A method and device for guaranteeing performance of stream data processing wherein a latency guarantee and a processing accuracy guarantee are possible while ensuring a real-time property. An execution system determination unit evaluates an amount of data currently present in a queue of an input data reception unit, calculation time, and the processing accuracy. Then, during a query process, if the amount of data in the queue increases for some reason, and is likely to be larger than the requested latency, the execution system determination unit changes the system to a calculation system by which the latency can be reduced within a range that a final quality can be allowed, on the basis of the evaluation result. Under the condition that the accuracy is reduced, if the latency is likely to be greatly lower than the requested latency, the system changes to a calculation system having a higher processing accuracy.Type: GrantFiled: January 26, 2011Date of Patent: January 26, 2016Assignee: HITACHI, LTD.Inventors: Takao Sakurai, Tomohiro Hanai
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Publication number: 20150345340Abstract: This power generation system (20A) includes a plurality of power generation units (50A, 50B, 50C, . . . ) which are provided in parallel, wherein each of the power generation units (50A, 50B, 50C, . . . ) includes an expander (26) configured to be rotated by a working medium, a power generator (28) configured to generate power through rotation of the expander (26), a rectifier (29), a medium circulation system (22) configured to pump the working medium into the expander (26), a relay (70) configured to interrupt power between the power generator (28) and an external power system (30), an operating unit (40A, 40B) configured to be operated when maintenance starts, and a relay driving unit (71) configured to interrupt power between the power generator (28) and the external power system (30) by the relay (70) when the operating unit (40A, 40B) has been operated.Type: ApplicationFiled: December 27, 2013Publication date: December 3, 2015Inventors: Yutaka KUBOTA, Toyotaka HIRAO, Takao SAKURAI, Naoki KOBAYASHI
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Publication number: 20150318763Abstract: This power generation system is provided with a medium circuit, a circulation pump, an evaporator which evaporates a medium, an expander configured to be driven using the medium evaporated by the evaporator, a condenser configured to condense the medium discharged from the expander, a generator configured to be driven by the expander to generate power, a cooling system configured to cool the generator using the medium taken out from the medium circuit at a downstream side of the condenser, and a gas-liquid separator configured to separate the medium heated as a consequence of cooling the generator by the cooling system into gas and liquid phases, wherein the gas phase of the medium is flowed into the medium circuit at an upstream side of the condenser, and the liquid phase of the medium is flowed into the medium circuit at the downstream side of the condenser.Type: ApplicationFiled: December 27, 2013Publication date: November 5, 2015Inventors: Yutaka KUBOTA, Takao SAKURAI, Toyotaka HIRAO, Naoki KOBAYASHI
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Patent number: 9037905Abstract: When reproducing the running state after a failure has occurred in stream data processing, all window operations are used while minimizing the storage amount necessary for obtaining backup data. While an operator is performing stream data processing in response to a query, a query analysis unit analyzes the operator, which holds the running state of the window, etc., and the recovery points of said operator. When obtaining backup data, a backup data management unit manages the capacity necessary to obtain snapshots of the analyzed recovery points, calculates the storage area capacity needed for backing up input data up to each recovery point and the storage area capacity needed to obtain a snapshot for a window that cannot be reproduced in that way, and records the execution state by selecting a recovery point which minimizes the total value of necessary storage capacity.Type: GrantFiled: August 24, 2010Date of Patent: May 19, 2015Assignee: Hitachi, Ltd.Inventors: Takao Sakurai, Masashi Egi, Tsuneyuki Imaki
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Patent number: 8966502Abstract: Collecting log data efficiently by controlling the capturing event for an operation log on the basis of application layer information. A web server generates a response including an operation log capturing script and the information from an operation log capturing control definition table and a property capturing definition table, and sends the response to a client. In the client, the received information is forwarded from a web browser module to a script engine module. An operation log capturing module sets the information acquisition event handler on the basis of the forwarded information, captures a sequential operation log on the basis of the operations performed by a user in the web browser, and sends the captured sequential operation log to a log server. A log server module collects sequential operation log in an operation log table, and a log analysis module analyzes the collected logs.Type: GrantFiled: September 1, 2010Date of Patent: February 24, 2015Assignee: Hitachi, Ltd.Inventors: Katsuro Kikuchi, Masashi Egi, Takao Sakurai, Daisuke Tashiro
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Patent number: 8848281Abstract: In order to create a stable non-linear optical effect with high efficiency for a plurality of input lights having different wavelengths, according to a first aspect of the present invention, provided is a wavelength conversion apparatus comprising an input section into which input light is input; a wavelength converting section that includes a polarity inverting structure whose polarity inverts periodically and that, in response to the input of light having a wavelength corresponding to the period with which the polarity inverts, converts the wavelength of the light; and a direction changing section that changes a progression direction in which the input light passes through the polarity inverting structure, according to the wavelength of the input light, without changing relative positions of the input section and the polarity inverting structure. Also provided are a light source apparatus and a wavelength converting method.Type: GrantFiled: January 11, 2013Date of Patent: September 30, 2014Assignee: Advantest CorporationInventor: Takao Sakurai
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Patent number: 8801094Abstract: A vehicle seat including a three-dimensional woven knitted fabric including a surface-layer-side base fabric, a back-layer-side base fabric, and an intermediate layer that three-dimensionally connects the surface-layer-side base fabric and the back-layer-side base fabric, the three-dimensional woven knitted fabric being tightly stretched on a seat frame by a locking member provided to an end portion thereof to form a seat surface, wherein an edge portion of the three-dimensional woven knitted fabric has a single-layer structure, which includes only the back-layer-side base fabric among the surface-layer-side base fabric, the back-layer-side base fabric and the intermediate layer, and wherein the locking member is provided to an end portion of the back-layer-side base fabric.Type: GrantFiled: August 29, 2012Date of Patent: August 12, 2014Assignee: Toyota Boshoku Kabushiki KaishaInventors: Takeshi Nishiura, Takao Sakurai
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Patent number: 8634083Abstract: An original document size detection device of the present invention is characterized by comprising a document reading table, a light source which irradiates an original document placed on the document reading table, a cover body which covers the original document, a light detection unit which detects a reflected light that a light from the light source is reflected by the original document and an external light that enters the surface of the document reading table when the cover body is lifted, a masking unit which masks an output signal based on the external light in the output signal of the light detection unit based on the reflected light and the external light, and a determination unit which determines a size of the original document in a main scanning direction based on the output signal of the light detection unit that is masked by the masking unit.Type: GrantFiled: August 15, 2012Date of Patent: January 21, 2014Assignees: NEC AccessTechnica, Ltd., NEC Engineering, Ltd.Inventors: Masaya Igawa, Satoshi Komatsu, Hiroyuki Okada, Koushi Takano, Takao Sakurai
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Publication number: 20130346417Abstract: The present invention is a stream data anomaly detection method for detecting an anomaly in input data received by a computer. The computer has: an input module for receiving the input data; an anomaly detection unit for detecting an anomaly in the input data; and an index management unit for calculating an index for the detection of an anomaly in the input data. The anomaly detection unit compares the received input data with the index and detects an anomaly in the input data when the difference between the value of the input data and the index satisfies a predetermined condition. The index management unit determines whether or not the index should be recalculated, and, when the index is determined to be recalculated, the index management unit recalculates a new index on the basis of the input data and substitutes the index with the calculated index.Type: ApplicationFiled: September 12, 2011Publication date: December 26, 2013Applicant: HITACHI, LTD.Inventors: Takao Sakurai, Tomohiro Hanai
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Publication number: 20130263156Abstract: In order to evaluate the service quality of an application, there are methods which acquire various types of events which occur upon a Web browser upon which an application is operating in order to analyze thereof. On this occasion, if all events are acquired/collected, a load is placed thereby upon the Web browser or a server which records the events. In the present invention, when the Web browser starts the application, a connection is made to an event handler which acquires events related to user operations or application responses. When the event handler detects the occurrence of an event, if the event has not been recorded in the past, the event is recorded as a log. In the case of another event, in case a script has been executed or in case data has been modified, the event is recorded as a log.Type: ApplicationFiled: January 31, 2011Publication date: October 3, 2013Applicant: HITACHI, LTD.Inventors: Hiromitsu Nakagawa, Tomohiro Nakamura, Tomotaka Shionoya, Takao Sakurai, Yukihisa Fujita
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Publication number: 20130204931Abstract: A method and device for guaranteeing performance of stream data processing wherein a latency guarantee and a processing accuracy guarantee are possible while ensuring a real-time property. An execution system determination unit evaluates an amount of data currently present in a queue of an input data reception unit, calculation time, and the processing accuracy. Then, during a query process, if the amount of data in the queue increases for some reason, and is likely to be larger than the requested latency, the execution system determination unit changes the system to a calculation system by which the latency can be reduced within a range that a final quality can be allowed, on the basis of the evaluation result. Under the condition that the accuracy is reduced, if the latency is likely to be greatly lower than the requested latency, the system changes to a calculation system having a higher processing accuracy.Type: ApplicationFiled: January 26, 2011Publication date: August 8, 2013Applicant: HITACHI, LTD.Inventors: Takao Sakurai, Tomohiro Hanai
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Publication number: 20130125143Abstract: Collecting log data efficiently by controlling the capturing event for an operation log on the basis of application layer information. A web server generates a response including an operation log capturing script and the information from an operation log capturing control definition table and a property capturing definition table, and sends the response to a client. In the client, the received information is forwarded from a web browser module to a script engine module. An operation log capturing module sets the information acquisition event handler on the basis of the forwarded information, captures a sequential operation log on the basis of the operations performed by a user in the web browser, and sends the captured sequential operation log to a log server. A log server module collects sequential operation log in an operation log table, and a log analysis module analyzes the collected logs.Type: ApplicationFiled: September 1, 2010Publication date: May 16, 2013Inventors: Katsuro Kikuchi, Masashi Egi, Takao Sakurai, Daisuke Tashiro
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Publication number: 20130086418Abstract: When reproducing the running state after a failure has occurred in stream data processing, all window operations are used while minimizing the storage amount necessary for obtaining backup data. While an operator is performing stream data processing in response to a query, a query analysis unit analyzes the operator, which holds the running state of the window, etc., and the recovery points of said operator. When obtaining backup data, a backup data management unit manages the capacity necessary to obtain snapshots of the analyzed recovery points, calculates the storage area capacity needed for backing up input data up to each recovery point and the storage area capacity needed to obtain a snapshot for a window that cannot be reproduced in that way, and records the execution state by selecting a recovery point which minimizes the total value of necessary storage capacity.Type: ApplicationFiled: August 24, 2010Publication date: April 4, 2013Applicant: HITACHI, LTD.Inventors: Takao Sakurai, Masashi Egi, Tsuneyuki Imaki
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Patent number: 8402048Abstract: A trail management system acquires and manages operation contents in a PC that is provided with an operation function including a document transcription function. When a user performs a transcription operation, a server acquires operation information and stores it as chronological data. The operation information contains time of the transcription operation, a user name, a value transcribed by the transcription operation, document specification information for specifying a transcription origin document during the transcription operation, location specification information for specifying a transcription origin location in the transcription origin document, document specification information for specifying a transcription destination document during the transcription operation, and location specification information for specifying a transcription destination location in the transcription origin document.Type: GrantFiled: March 30, 2010Date of Patent: March 19, 2013Assignee: Hitachi, Ltd.Inventors: Masashi Egi, Takao Sakurai, Ken Naono
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Publication number: 20130057035Abstract: A vehicle seat including a three-dimensional woven knitted fabric including a surface-layer-side base fabric, a back-layer-side base fabric, and an intermediate layer that three-dimensionally connects the surface-layer-side base fabric and the back-layer-side base fabric, the three-dimensional woven knitted fabric being tightly stretched on a seat frame by a locking member provided to an end portion thereof to form a seat surface, wherein an edge portion of the three-dimensional woven knitted fabric has a single-layer structure, which includes only the back-layer-side base fabric among the surface-layer-side base fabric, the back-layer-side base fabric and the intermediate layer, and wherein the locking member is provided to an end portion of the back-layer-side base fabric.Type: ApplicationFiled: August 29, 2012Publication date: March 7, 2013Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Takeshi NISHIURA, Takao SAKURAI
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Publication number: 20130044334Abstract: An original document size detection device of the present invention is characterized by comprising a document reading table, a light source which irradiates an original document placed on the document reading table, a cover body which covers the original document, a light detection unit which detects a reflected light that a light from the light source is reflected by the original document and an external light that enters the surface of the document reading table when the cover body is lifted, a masking unit which masks an output signal based on the external light in the output signal of the light detection unit based on the reflected light and the external light, and a determination unit which determines a size of the original document in a main scanning direction based on the output signal of the light detection unit that is masked by the masking unit.Type: ApplicationFiled: August 15, 2012Publication date: February 21, 2013Applicants: NEC ENGINEERING, LTD., NEC ACCESS TECHNICA, LTD.Inventors: MASAYA IGAWA, SATOSHI KOMATSU, HIROYUKI OKADA, KOUSHI TAKANO, TAKAO SAKURAI
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Publication number: 20130044357Abstract: An original document size detection device characterized by comprising a document reading table, a light source which irradiates an original document placed on the document reading table, a cover body which covers the original document, a light detection unit which detects a reflected light that a light from the light source is reflected by the original document, an angle detection unit which detects an opening angle of the cover body and has a first photo sensor, a second photo sensor, a third photo sensor, and a shield plate, and a determination unit which determines the size of the original document in a sub-scanning direction when the opening angle of the cover body is equal to an angle al and the size of the original document in a main scanning direction when the opening angle of the cover body is equal to an angle ?2 (?1>?2) based on an output signal of the light detection unit and an output signal of the angle detection unit.Type: ApplicationFiled: August 15, 2012Publication date: February 21, 2013Applicants: NEC ENGINEERING, LTD., NEC ACCESS TECHNICA, LTD.Inventors: Masaya IGAWA, Satoshi KOMATSU, Hiroyuki OKADA, Koushi TAKANO, Takao SAKURAI
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Patent number: 8352093Abstract: An environmental control system according to the present invention is a system for controlling environmental devices by which a work status and a behavior status are monitored and the environmental devices are finely controlled in accordance with the statuses to improve comfort. The environmental control system includes a communication unit, a unit for detecting environments, a unit for detecting a work status, a unit for obtaining power consumption, a unit for determining the control of a device, and a unit for transmitting a control signal, and enables fine control in accordance with a work type.Type: GrantFiled: October 20, 2010Date of Patent: January 8, 2013Assignee: Hitachi, Ltd.Inventors: Minako Toba, Yasuhide Mori, Ken Naono, Masashi Egi, Takao Sakurai
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Publication number: 20120303684Abstract: At the time of copy & paste, an item, a size and a paste content are recorded, and the importance of the paste is determined based on the number of pasted items, and a pasted data size relative to the overall file. Also, an item name and a change content are recorded, and when the manager inputs an important keyword (or unimportant keyword) in visualizing a file history, the importance is increased (or decreased) if the keyword is included in the item name or the change content. A function of displaying the file history in order of importance if the file history is displayed in table format in visualizing the file history, and a function of displaying, or highlighting, only the source file in which the importance is greater than or equal to a threshold set by the manager if the file history is displayed graphically are provided.Type: ApplicationFiled: May 27, 2011Publication date: November 29, 2012Applicant: HITACHI, LTD.Inventors: Takao Sakurai, Yukihisa Fujita, Ken Naono
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Patent number: 8311868Abstract: To readily understand contents of business operations without burdening an operator, this invention provides a business analysis method including: obtaining information on operations of a user with respect to software programs selected by the user among the plurality of software programs operated by a computer; estimating one business content that is executed by the computer in each of time spans based on a combination of exploited identification information of the plurality of software programs.Type: GrantFiled: May 10, 2007Date of Patent: November 13, 2012Assignee: Hitachi, Ltd.Inventors: Ken Naono, Masashi Egi, Takao Sakurai