Patents Assigned to Ibaraki University
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Publication number: 20250110472Abstract: A three-dimensional CAD/CAM system includes: a primitive generation unit using a differential polyhedron model being a set including coordinate values and normal vectors of triangle vertices, and curved line elements including start/end points being the triangle vertices and tangent vectors at the start/end points to form a curved surface by connecting sides of the differential polyhedron and form a closed surface by connecting curved surfaces with a curved surface boundary line; a storage unit storing CSG data representing a solid model in CSG representation by a tree structure of set operations of the primitives; a dexel generation unit determining an intersection point between the solid model and a straight line from the intersection point between the closed surface of the primitive and the straight line by a set operation based on the CSG data; and an NC data generation unit for positioning a tool on the basis of the dexel.Type: ApplicationFiled: June 6, 2022Publication date: April 3, 2025Applicants: CORE CONCEPT TECHNOLOGIES INC., IBARAKI UNIVERSITYInventors: Tadaaki TAGUCHI, Masatomo INUI, Soichiro KOMORI, Akio TANAKA, Katsunori SHIMOMURA
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Publication number: 20250031635Abstract: A culture soil for plants includes a fungus of genus Cladophialophora, and one kind of soil of strongly acidic organic cultivation soil, strongly acidic conventional cultivation soil, or weakly acidic to neutral organic cultivation soil. Alternatively, a culture soil for plants contains fungi, which are Exophiala sp. SK47 or a mutant isolate thereof, and strongly acidic organic cultivation soil or strongly acidic conventional cultivation soil; a method of cultivating plant using the culture soil; and a seedling of a plant with culture soil are also provided.Type: ApplicationFiled: November 21, 2022Publication date: January 30, 2025Applicant: Ibaraki UniversityInventors: Kazuhiko NARISAWA, Harsonowati WIWIEK
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Publication number: 20240327236Abstract: A core-shell structure particle may include: a core particle including BaTiO3 having a particle size of 100 nm or less; and a shell phase including at least one of CaTiO3 and SrTiO3 and surrounding the core particle at a thickness of 1 unit or more and 10 units or less of a perovskite structure.Type: ApplicationFiled: March 7, 2024Publication date: October 3, 2024Applicants: SAMSUNG ELECTRO-MECHANICS CO., LTD., IBARAKI UNIVERSITYInventors: Ken Yamaguchi, Toshihiro Doi, Kotaro Hata, Koichi Nakashima
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Publication number: 20240209487Abstract: To provide a cast, hot-worked product of an Al—Mg—Si aluminum alloy which is configured to suppress the development of cracks when a certain tensile load is applied in high humidity, and a method for producing the cast, hot-worked product. A cast, hot-worked product of an Al—Mg—Si aluminum alloy, wherein the aluminum alloy comprises Si and Cu, and wherein an Si/Cu ratio, which is a ratio of a mass % of the Si to a mass % of the Cu, is less than 3.3.Type: ApplicationFiled: December 20, 2023Publication date: June 27, 2024Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Ibaraki UniversityInventors: Takashi AISAKA, Hitoshi TANINO, Goroh ITOH, Shigeru KURAMOTO
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Patent number: 11935974Abstract: Provided is a semiconductor material having improved oxidation resistance. The semiconductor material has a single crystal represented by the following composition formula: Mg2Sn·Zna??Composition formula: in which, a is a Zn content of from 0.05 to 1 at % relative to Mg2Sn.Type: GrantFiled: May 23, 2019Date of Patent: March 19, 2024Assignees: IBARAKI UNIVERSITY, JX METALS CORPORATIONInventors: Haruhiko Udono, Toshiaki Asahi
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Publication number: 20230364613Abstract: A leukocyte trapping apparatus configured so: a chip having protruding parts arranged on a flat part, a blood-containing solution that enters through an inlet port is allowed to pass through the surface of the flat part and through spaces between two adjacent protruding parts in the chip and is discharged through a discharge port; the protruding parts are arranged in layers on the flat part, layer containing a plurality of the protruding parts, and the blood-containing solution that has passed through a layer located on the inlet port side passes through another layer that is adjacent to the layer on the discharge port side; a trapping part and a bypass part are between two adjacent protruding parts in each layer; and the trapping part is on the discharge port side of the bypass part in a specific layer as a portion of another layer adjacent to the specific layer.Type: ApplicationFiled: September 10, 2021Publication date: November 16, 2023Applicants: NOK CORPORATION, National University Corporation Ibaraki UniversityInventors: Asako NAKAMURA, Kenta TAKAHASHI, Takayuki KOMORI
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Publication number: 20220341057Abstract: Provided is a Mg2Si single crystal in which generation of low-angle grain boundaries in the crystal is satisfactorily suppressed. A Mg2Si single crystal, wherein a variation in crystal orientation as measured by XRD is in a range of ±0.020°.Type: ApplicationFiled: February 25, 2021Publication date: October 27, 2022Applicants: Ibaraki University, JX Nippon Mining & Metals CorporationInventor: Haruhiko UDONO
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Publication number: 20220013675Abstract: Provided is a semiconductor material having improved oxidation resistance. The semiconductor material has a single crystal represented by the following composition formula: Mg2Sn.Zna??Composition formula: in which, a is a Zn content of from 0.05 to 1 at % relative to Mg2Sn.Type: ApplicationFiled: May 23, 2019Publication date: January 13, 2022Applicants: Ibaraki University, JX Nippon Mining & Metals CorporationInventors: Haruhiko UDONO, Toshiaki ASAHI
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Patent number: 11011664Abstract: Provided is a semiconductor photodiode which has an electrode structure having not only high adhesion to a Mg2Si material but also improved overall performance including photosensitivity. A photodiode comprising: a pn junction of a magnesium silicide crystal; an electrode comprising a material that is in contact with p-type magnesium silicide; and an electrode comprising a material that is in contact with n-type magnesium silicide, wherein the material that is in contact with p-type magnesium silicide is a material which has a work function of 4.81 eV or more and reacts with silicon to form a silicide or form an alloy with magnesium.Type: GrantFiled: September 20, 2018Date of Patent: May 18, 2021Assignees: IBARAKI UNIVERSITY, JX NIPPON MINING & METALS CORPORATIONInventors: Haruhiko Udono, Toshiaki Asahi
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Patent number: 10897208Abstract: A power conversion apparatus performs power conversion among at least a first device, a second device, and a third device. The power conversion apparatus includes a primary converter configured to perform power conversion between the first device and second device. The primary converter includes a first switch, a second switch, a third switch, a fourth switch, and a capacitor. The second switch, the third switch, the fourth switch, and the capacitor are connected in full bridge configuration to constitute a full bridge converter.Type: GrantFiled: November 8, 2019Date of Patent: January 19, 2021Assignees: DENSO CORPORATION, IBARAKI UNIVERSITYInventors: Seiji Iyasu, Yuji Hayashi, Masatoshi Uno
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Publication number: 20200161981Abstract: A power conversion apparatus performs power conversion among at least a first device, a second device, and a third device. The power conversion apparatus includes a primary converter configured to perform power conversion between the first device and second device. The primary converter includes a first switch, a second switch, a third switch, a fourth switch, and a capacitor. The second switch, the third switch, the fourth switch, and the capacitor are connected in full bridge configuration to constitute a full bridge converter.Type: ApplicationFiled: November 8, 2019Publication date: May 21, 2020Applicants: DENSO CORPORATION, IBARAKI UNIVERSITYInventors: Seiji IYASU, Yuji HAYASHI, Masatoshi UNO
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Publication number: 20200052142Abstract: Provided is a semiconductor photodiode which has an electrode structure having not only high adhesion to a Mg2Si material but also improved overall performance including photosensitivity. A photodiode comprising: a pn junction of a magnesium silicide crystal; an electrode comprising a material that is in contact with p-type magnesium silicide; and an electrode comprising a material that is in contact with n-type magnesium silicide, wherein the material that is in contact with p-type magnesium silicide is a material which has a work function of 4.81 eV or more and reacts with silicon to form a silicide or form an alloy with magnesium.Type: ApplicationFiled: September 20, 2018Publication date: February 13, 2020Applicants: IBARAKI UNIVERSITY, JX NIPPON MINING & METALS CORPORATIONInventors: Haruhiko UDONO, Toshiaki ASAHI
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Patent number: 10302830Abstract: A wire grid device having transmission power characteristics and a power extinction ratio in a terahertz wave band that cannot be achieved conventionally. A cutout is formed between one end and an opposite end of a rectangular metal thin plate to form a plurality of grid plates each having an elongated grid part between the one end and the opposite end. The grid plates are stacked in such a manner that the grid parts of the grid plates are spaced at a given interval and face each other, thereby forming a grid plate stack. In this case, spacers are inserted between one ends and between opposite ends of adjacent ones of the grid plates to form parallel flat plates configured by the grid parts. The grid plate stack forming the parallel flat plates operates as a polarizer for a terahertz wave band.Type: GrantFiled: August 21, 2015Date of Patent: May 28, 2019Assignee: IBARAKI UNIVERSITYInventor: Takehito Suzuki
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Publication number: 20190074595Abstract: A sheet-type metamaterial includes: a film-shaped dielectric substrate; a first and second wire array formed on the dielectric substrate's front surface and back surface respectively. The first wire array includes elongated metallic first cut wires of a length aligned in a y-axis direction with a gap g therebetween and in an x-axis direction with space s therebetween. The second wire array includes second cut wires having same shape as first cut wires and aligned so as to overlap first cut wires and to be symmetric with the first cut wires. With a design frequency set at 0.51 THz, the dielectric substrate's thickness d is set at about 50 ?m, space s is set at about 361 ?m, gap g is set at about 106 ?m, and the length of first and second cut wires is set at a length approximate to a value to generate resonance at a working frequency.Type: ApplicationFiled: February 7, 2017Publication date: March 7, 2019Applicant: IBARAKI UNIVERSITYInventor: Takehito SUZUKI
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Publication number: 20180226724Abstract: A sheet-type metamaterial of a film configuration to exhibit a figure of merit (FOM) exceeding 300 in a terahertz wave band. A film-shaped dielectric substrate has a front surface on which a first wire array is formed, and a back surface on which a second wire array is formed. The first wire array includes elongated metallic first cut wires of a predetermined length l aligned in a y-axis direction with a gap g therebetween and in an x-axis direction with space s therebetween. The second wire array includes second metallic cut wires having the same shape as the first cut wires and aligned to overlap the first cut wires. With a thickness d of the dielectric substrate set at about 50 ?m, the length l of the first cut wire and the second cut wire is a length approximate to a value to generate resonance at a design frequency.Type: ApplicationFiled: July 15, 2016Publication date: August 9, 2018Applicant: IBARAKI UNIVERSITYInventor: Takehito SUZUKI
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Patent number: 9964678Abstract: Achieve an extinction ratio in the approximate 10?6 class for intensity transmittance in the terahertz band with one element. A wire grid device configured from layering a plurality of film substrates each formed from a rectangular polymer film wherein a narrow rectangular metal thin plate is formed in the approximate center of one face thereof. By having the width of the metal thin plate be approximately 1.0 mm, the length of the metal thin plate be approximately 12.0-30 mm, and the thickness of the film substrate be approximately 0.5-50 ?m, it is possible to easily achieve an extinction ratio in the approximate 10?6 class for intensity transmittance in the terahertz band with one element.Type: GrantFiled: August 21, 2014Date of Patent: May 8, 2018Assignees: IBARAKI UNIVERSITY, JAPAN SCIENCE AND TECHNOLOGY AGENCYInventor: Takehito Suzuki
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Patent number: 9799960Abstract: Optical axis as central axis is defined as z-axis, and axes perpendicular to z-axis are defined as x- and y-axis. Metallic flat plates are formed parallel to x-z plane to overlap each other and be separated by a given distance. Multiple flat plates except the top flat plate and bottom flat plate are each provided with multiple through holes. Central flat plates are each provided with through holes of a first radius. Intermediate flat plates arranged between central flat plate and top flat plate and between central flat plate and bottom flat plate are each provided with through holes of a second radius smaller than first radius. Second radius of through holes formed in an intermediate flat plate arranged in a position farther from central flat plate is smaller than second size of through holes formed in an intermediate flat plate arranged in a position closer to central flat plate.Type: GrantFiled: March 14, 2014Date of Patent: October 24, 2017Assignee: IBARAKI UNIVERSITYInventor: Takehito Suzuki
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Publication number: 20170227697Abstract: A wire grid device having transmission power characteristics and a power extinction ratio in a terahertz wave band that cannot be achieved conventionally. A cutout is formed between one end and an opposite end of a rectangular metal thin plate to form a plurality of grid plates each having an elongated grid part between the one end and the opposite end. The grid plates are stacked in such a manner that the grid parts of the grid plates are spaced at a given interval and face each other, thereby forming a grid plate stack. In this case, spacers are inserted between one ends and between opposite ends of adjacent ones of the grid plates to form parallel flat plates configured by the grid parts. The grid plate stack forming the parallel flat plates operates as a polarizer for a terahertz wave band.Type: ApplicationFiled: August 21, 2015Publication date: August 10, 2017Applicant: IBARAKI UNIVERSITYInventor: Takehito SUZUKI
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Publication number: 20160209567Abstract: Achieve an extinction ratio in the approximate 10?6 class for intensity transmittance in the terahertz band with one element. A wire grid device configured from layering a plurality of film substrates each formed from a rectangular polymer film wherein a narrow rectangular metal thin plate is formed in the approximate center of one face thereof. By having the width of the metal thin plate be approximately 1.0 mm, the length of the metal thin plate be approximately 12.0-30 mm, and the thickness of the film substrate be approximately 0.5-50 ?m, it is possible to easily achieve an extinction ratio in the approximate 10?6 class for intensity transmittance in the terahertz band with one element.Type: ApplicationFiled: August 21, 2014Publication date: July 21, 2016Applicants: IBARAKI UNIVERSITY, JAPAN SCIENCE AND TECHNOLOGY AGENCYInventor: Takehito SUZUKI
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Publication number: 20160028142Abstract: Optical axis as central axis is defined as z-axis, and axes perpendicular to z-axis are defined as x- and y-axis. Metallic flat plates are formed parallel to x-z plane to overlap each other and be separated by a given distance. Multiple flat plates except the top flat plate and bottom flat plate are each provided with multiple through holes. Central flat plates are each provided with through holes of a first radius. Intermediate flat plates arranged between central flat plate and top flat plate and between central flat plate and bottom flat plate are each provided with through holes of a second radius smaller than first radius. Second radius of through holes formed in an intermediate flat plate arranged in a position farther from central flat plate is smaller than second size of through holes formed in an intermediate flat plate arranged in a position closer to central flat plate.Type: ApplicationFiled: March 14, 2014Publication date: January 28, 2016Applicant: IBARAKI UNIVERSITYInventor: Takehito SUZUKI