Patents Assigned to Yokohama National University
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Patent number: 8558533Abstract: According to a reception passive intermodulation measurement method of the present invention, a device under test is set to the mismatching condition, and a standing wave is generated on a transmission line where the sample is connected. Since the tip of the transmission line is short-circuited using the sample, the sample is positioned at the anti-node of the standing wave, and test signals are applied at a high current density. System noise is calibrated with the tip of the transmission line being open. Since impedance matching is not required and terminators are not employed, a large measurement dynamic range is obtained without being affected by passive intermodulation that is generated in terminators. The sample is very small, and an arbitrary shape can be selected. The property measurement is enabled for a wide range of materials, regardless of a conductive material, an insulating material and a magnetic material.Type: GrantFiled: February 23, 2007Date of Patent: October 15, 2013Assignee: Yokohama National UniversityInventors: Nobuhiro Kuga, Yasuyuki Yamamoto
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Publication number: 20130261073Abstract: The present invention provides a novel compound capable of inhibiting cardiac adenylyl cyclase. The present invention relates to a compound represented by the following formula (I) or a pharmaceutically acceptable salt, ester or solvate thereof: where R1, R2 and R3 each independently represent a hydrogen atom or an acyl group having an acidic or basic substituent, provided that all of R1, R2 and R3 are not simultaneously a hydrogen atom. The present invention also provides a modulator of adenylyl cyclase activity, a pharmaceutical composition and a food composition, all of which comprise the above-described compound or a pharmaceutically acceptable salt, ester or solvate thereof.Type: ApplicationFiled: October 20, 2011Publication date: October 3, 2013Applicants: National Univeristy Corporation Yokohama National University, Public University Corporation Yokohama City UniversityInventors: Yoshihiro Ishikawa, Satoshi Okumura, Yujiro Hoshino, Seiichi Inoue
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Patent number: 8547201Abstract: According to one embodiment, when sending a transmission target main data 21, an authentication-tag generator unit 13 generates an authentication tag 23 by using a main data 21 and a key data 22 stored in a key-data storage unit 12. A transmitter/receiver unit 14 adds the authentication tag 23 to the main data 32 sends as a transmission data. When receiving the received data 24a, the transmitter/receiver unit 14 divides the received data into a main data 21a and an authentication tag 23a. The authentication-tag generator unit 13 generates an authentication tag 23b for comparison. A received-data authentication unit 15 determines whether or not those the received authentication tag 23a and the authentication tag for comparison 23b match with each other. A different key data is used every time upon the authentication-tag generation and use time of each key data during a set period is restricted.Type: GrantFiled: December 28, 2009Date of Patent: October 1, 2013Assignees: Kabushiki Kaisha Toshiba, Yokohama National UniversityInventors: Shigeki Katayama, Katsuhiko Sekiguchi, Kazuto Fukushima, Tsutomu Matsumoto
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Patent number: 8535849Abstract: An electrochemical cell includes an electrolyte membrane containing an ionic conductor. The ionic conductor includes: (a) a cation expressed by one of Formulae (1) and (2): R1R2R3HX+??(1) where, in Formula (1), X indicates any one of N and P, and R1, R2 and R3 each indicate any one of alkyl groups C1 to C18 except a structure in which R1=R2=R3, R1R2HS+??(2) where, in Formula (2), R1 and R2 each indicate any one of alkyl groups C1 to C18 except a structure in which R1=R2; and (b) an anion expressed by Formula (3): R4YOm(OH)n?1O???(3) where, in Formula (3), Y indicates any one of S, C, N and P, R4 indicates any one of an alkyl group and a fluoroalkyl group, and m and n each indicate any one of 1 and 2.Type: GrantFiled: October 27, 2011Date of Patent: September 17, 2013Assignees: Nissan Motor Co., Ltd., National University Corporation Yokohama National UniversityInventors: Masayoshi Watanabe, Hirofumi Nakamoto, Tomokazu Yamane, Toshihiro Takekawa
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Patent number: 8503847Abstract: A multi-core fiber of the present invention employs the multi-core fiber mode, which corresponds to the “uncoupled” operation aspect in which individual cores are used independently for single-mode transmission, to perform space division multiplexing transmission using a multi-core fiber in which multiple single-mode cores are stored in one optical fiber. More specifically, the multi-core fiber of the present invention forms an uncoupled multi-core fiber that makes individual cores correspond to single-mode, independent transmission channels.Type: GrantFiled: October 2, 2009Date of Patent: August 6, 2013Assignees: National University Corporation Yokohama National University, National University Corporation Hokkaido UniversityInventors: Yasuo Kokubun, Masanori Koshiba, Toshio Morioka
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Patent number: 8469654Abstract: A rotary-type fluid machine which enables practical and effective operation in an extremely low specific speed range. The rotary-type fluid machine (1, 1?) has an impeller (10, 10?) integrally connected to a rotating drive shaft (2). The impeller is accommodated in a casing (3). Fluid (a) of a suction fluid passage (4) to be pumped flows into a center part (11) of the impeller. The fluid (b) is discharged from a peripheral portion (12) of the impeller by the effect of the centrifugal force of the rotating impeller, so that the fluid is delivered through a delivery fluid passage (5) outside of the casing. Many grooves (15) extending toward a peripheral edge of the impeller from the center part of the impeller are formed on the impeller. The groove opens on an outer circumferential surface (18) of the impeller, and causes strong recirculation vortices (R) to be formed in the vicinity of the peripheral edge of the impeller when the impeller rotates.Type: GrantFiled: January 14, 2009Date of Patent: June 25, 2013Assignee: National University Corporation Yokohama National UniversityInventors: Junichi Kurokawa, Shuusaku Kagawa
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Publication number: 20130156393Abstract: In a multicore fiber in which multiple single mode cores are stored in one optical fiber, the multicore fiber has a lattice-point arrangement in which multiple lattice points are periodically arranged two-dimensionally with translational symmetry and rotational symmetry or one of translational symmetry and rotational symmetry and, in that lattice-point arrangement, multiple cores are arranged with the lattice points of the lattice-point arrangement as reference positions. By giving different perturbations to the propagation constants of the cores, the propagation constants of the cores are each varied from the original propagation constants. Because of the variation in the propagation constants, the core-to-core coupling amount, which is dependent on the varied propagation constants, fall below a predetermined setting amount.Type: ApplicationFiled: August 23, 2011Publication date: June 20, 2013Applicant: National University Corporation Yokohama National UniversityInventors: Yasuo Kokubun, Kohei Tomozawa
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Publication number: 20130123153Abstract: The invention provides a magneto-rheological grease composition which contains (a) a base oil including at least 30% by mass of an ether type synthetic oil; (b) an aliphatic diurea thickener; and (c) magnetic particles in an amount of 45 to 95% by mass based on the total mass of the composition. The magneto-rheological grease composition can show superior thermal stability, dispersion stability and magneto-rheological properties.Type: ApplicationFiled: November 16, 2012Publication date: May 16, 2013Applicants: YOKOHAMA NATIONAL UNIVERSITY, KYODO YUSHI CO., LTD.Inventors: KYODO YUSHI CO., LTD., YOKOHAMA NATIONAL UNIVERSITY
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Patent number: 8381802Abstract: This invention provides a heat transfer device which can improve its heat transfer performance in a heat exchanger with a flow rate of heat carrier fluid being set at a relatively low velocity, while restricting increase in pressure loss of the fluid flow. Plural longitudinal vortex generator winglets (10) are arranged in a spanwise direction on each side of the heat transfer object (T). The winglets on each side are oriented substantially in the same direction for deflecting the fluid to the same direction and conducting the fluid to an area behind the object. Each of the winglets has a configuration gradually decreasing in its height toward an upstream side of a flow of the fluid. Longitudinal vortices are produced behind the winglets by the fluid flowing rearward beyond the winglets.Type: GrantFiled: December 27, 2006Date of Patent: February 26, 2013Assignee: National University Corporation Yokohama National UniversityInventors: Kouichi Nishino, Gil-Dal Song
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Patent number: 8386110Abstract: A travel route generating method for an unmanned vehicle, which includes a condition input step of inputting a vehicle constraint condition including a vehicle width and a minimum turning radius of the unmanned vehicle, and a geometrical constraint condition including a travel route generation range in which the unmanned vehicle is to travel, an obstacle to avoid, and a position and a direction of an entrance point and an exit point; and a travel route generating step of generating a travel route such that the vehicle constraint condition and the geometrical constraint condition are satisfied, and such that a function value of a cost function having at least a magnitude of a curve and/or a rate of change in the curve as a cost element is minimized.Type: GrantFiled: September 21, 2009Date of Patent: February 26, 2013Assignees: Komatsu Ltd., Yokohama National UniversityInventors: Takashi Maekawa, Tetsuya Noda, Shigefumi Tamura, Tomonori Ozaki
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Patent number: 8350853Abstract: When an interpolation point is interpolated using a curve/curved surface, represented by control points, such as a B-Spline curve/curved surface or a subdivision surface, interpolation processing is performed in such a way that a moving vector for moving each control point is calculated using position information on interpolation points constituting the point group, as well as vector information on the unit direction vector that is set for each interpolation point, and the control point is moved in the movement direction and for the movement amount of this moving vector. By, repeating the generation step of a curve/curved surface that interpolates the interpolation point and the movement step of the control point, the position of a new control point is found that fits the curve/curved surface to the positions and the unit direction vectors of the point group.Type: GrantFiled: October 24, 2008Date of Patent: January 8, 2013Assignee: National University Corporation Yokohama National UniversityInventors: Takashi Maekawa, Shu-Ichi Gofuku, Shigefumi Tamura
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Publication number: 20130000792Abstract: A heat treatment method according to the present invention includes a preliminary-state-generating step of heat-treating an alloy that undergoes multiple-step transformation with temperature by bringing the alloy in contact with a contact-type heating element for 0.01 sec or more and 3.0 sec or less, the contact-type heating element being adjusted to a particular temperature within a preliminary-state-generating temperature region determined on the basis of a first temperature related to a particular first transformation of the alloy and a second temperature, which is higher than the first temperature, related to a particular second transformation of the alloy so as to generate a preliminary state in the alloy.Type: ApplicationFiled: September 14, 2012Publication date: January 3, 2013Applicants: Yokohama National University, NGK Insulators, Ltd.Inventors: Mahoto TAKEDA, Naokuni Muramatsu, Ryota Takeuchi
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Publication number: 20120312432Abstract: An orientation of crystal axis <001> of the metallic material as a solid solution having a structure of body-centered cubic (BCC) is arranged along a work surface of the metallic material by hot rolling process in a temperature range of structuring the metallic material to be BCC single phase solid solution. For example, Fe-Si alloy as the metallic material is heated in the temperature range for BCC single phase solid solution, and processed so as to arrange the orientation of crystal axis <001> along the work surface by pressing the BCC single phase solid solution in a strain rate to maintain work condition for controlling motion of dislocation by atmosphere of solute atom generated in BCC single solid solution and migrating grain boundary by strain energy stored in a crystal grain as driving force.Type: ApplicationFiled: February 28, 2011Publication date: December 13, 2012Applicant: NATIONAL UNIVERSITY CORPORATION, YOKOHAMA NATIONAL UNIVERSITYInventors: Hiroshi Fukutomi, Kazuto Okayasu, Yusuke Onuki
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Publication number: 20120295174Abstract: A voltage boost converter includes: a main voltage boost portion that has a first switch and a first coil, and that raises output voltage of a direct-current power source by using counter electromotive force of the coil caused by the switch performing a switching action on the coil; and a subsidiary voltage boost portion which has a capacitor that adjusts potential difference between two poles of the switch by amount of electricity stored, and which reduces switching loss of the switch by adjusting the amount of electricity in the capacitor during the switching action, and which has a second switch and a second coil. The second coil is formed by winding a wire around at least a portion of a core formed of a magnetic body. The core is provided with a gap formed of a non-magnetic body. A core region formed of a magnetic body is adjacent to the gap.Type: ApplicationFiled: December 16, 2010Publication date: November 22, 2012Applicants: National University Corporation Yokohama National University, Toyota Jidosha Kabushiki KaishaInventors: Hiroyuki Imanishi, Kota Manabe, Nobuyuki Kitamura, Takahiko Hasegawa, Atsuo Kawamura, Yukinori Tsuruta
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Patent number: 8290555Abstract: A superconducting wire having at least a superconducting thin film and a stabilizing film formed one on top of another in order on a substrate having a predetermined width and a predetermined length, the superconducting wire having at least one cut made along a direction of the length of the superconducting wire, the superconducting wire being bendable at the cut in a width direction.Type: GrantFiled: January 23, 2009Date of Patent: October 16, 2012Assignees: The Furukawa Electric Co., Ltd., International Superconductivity Technology Center, the Juridical Foundation, National University Corporation Yokohama National UniversityInventors: Masashi Yagi, Shinichi Mukoyama, Yuh Shiohara, Teruo Izumi, Naoyuki Amemiya
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Patent number: 8241882Abstract: The present invention aims to provide a hydrogen-producing bacterium, which excels in hydrogen yield and hydrogen production rate, and is usable for industrial hydrogen production from biomass as a production source. That is, it is intended to provide a bacterium belonging to the genus Clostridium which has a property of producing hydrogen at a rate of 60 mmol or more per hour per liter of a culture liquid which contains glucose as a substrate, by batch cultivation in a YNU anaerobic culture medium at 47° C. and pH 6.0, and a hydrogen production method comprising the use of the bacterium belonging to the genus Clostridium.Type: GrantFiled: March 12, 2008Date of Patent: August 14, 2012Assignee: National University Corporation Yokohama National UniversityInventors: Shigeharu Tanisho, Hiroki Nishiyama
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Patent number: 8228329Abstract: An initial polygon obtained from a point group is used as a control polygon, and a control point of the control polygon is offset in a normal direction by the shortest distance from a limit surface generated by the control polygon, so that the position of new control point is determined to allow a subdivision surface to interpolate the initial polygon, thereby generating the subdivision surface which interpolates the point group. A first process to determine the point on the subdivision surface at the shortest distance from each control point, and a second process to move and offset the control point in the normal direction from the surface by the distance between the point on the surface and the initial control point, are iterated until the distance between the initial point group and the point on the surface satisfies the threshold or becomes smaller than the threshold, thereby generating the subdivision surface interpolating the initial polygon.Type: GrantFiled: January 15, 2007Date of Patent: July 24, 2012Assignee: National University Corporation Yokohama National UniversityInventors: Takashi Maekawa, Yasunori Matsumoto, Ken Namiki
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Patent number: 8170768Abstract: The present invention provides a slip rate estimating device measuring a slip ratio without the need for a body speed and a slip ratio control device using the slip ratio estimating device. A motor torque measured by a torque measuring instrument is input to each of a vehicle model (601) and an SRE (602) that performs calculations including time differentiation of the slip ratio. The vehicle model (601) derives a wheel rotation speed, a wheel rotation acceleration, and a body speed. The vehicle model (601) outputs the wheel rotation speed and the wheel rotation acceleration to the SRE (602). The SRE (602) outputs the slip ratio based on the motor torque, the wheel rotation speed, and the wheel rotation acceleration.Type: GrantFiled: March 5, 2007Date of Patent: May 1, 2012Assignee: Yokohama National UniversityInventors: Hiroshi Fujimoto, Kiyoshi Fujii
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Patent number: 8138246Abstract: A polymer electrolyte which comprises an ionic liquid (A) and a block copolymer (B) as essential ingredients, which block copolymer (B) comprises one or more of polymer block(s) (P) being compatible with (A) and one or more of polymer block(s) (Q) being incompatible with (A). (A) and (P) mutually dissolve each other to form one phase (X), and (Q) forms a phase (Y) being incompatible with phase (X), and phase (X) and phase (Y) are mutually micro phase separated. The polymer electrolyte of the present invention shows practical ion conductivity, is excellent in retention of ionic liquid, and moreover, is also excellent in heat resistance and mechanical strength.Type: GrantFiled: October 2, 2007Date of Patent: March 20, 2012Assignees: Kuraray Co., Ltd., Yokohama National UniversityInventors: Toshinori Kato, Hiroyuki Ohgi, Masayoshi Watanabe
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Patent number: 8105433Abstract: It is an object of the invention to provide a cement admixture that can form concrete having a sufficient self-healing capability and satisfactorily maintaining its self-healing capability for prolonged periods. The cement admixture of the invention contains an expanding material and an alumina-silicate with swelling properties. The cement admixture is combined with cement to form a cement composition. The cement composition is mixed with water and an aggregate to provide concrete with an excellent self-healing capability.Type: GrantFiled: February 13, 2009Date of Patent: January 31, 2012Assignees: The University of Tokyo, National University Corporation Yokohama National University, East Japan Railway CompanyInventors: Toshiharu Kishi, Tae-Ho Ahn, Akira Hosoda, Kaoru Kobayashi