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477 results on '"Nakamura, Yoshiko"'

102. Three cases of Fontan-associated liver disease: diagnosis by laparoscopic liver biopsy

Author

Koizumi, Yohei, primary, Hirooka, Masashi, additional, Imai, Yuusuke, additional, Nakamura, Yoshiko, additional, Watanabe, Takao, additional, Yoshida, Osamu, additional, Tokumoto, Yoshio, additional, Takeshita, Eiji, additional, Ikeda, Yoshiou, additional, Higaki, Takashi, additional, Abe, Masanori, additional, Ishii, Eiichi, additional, and Hiasa, Yoichi, additional

Published
2016
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104. Anomalous band-filling dependence of the quasiparticle density of states and the gap ratio 2Δ0/kBTc in strong-coupling superconductors

Author

Yokoya Yasushi and Oi Nakamura Yoshiko

Subjects
Coupling, Superconductivity, Physics, Condensed matter physics, Density of states, Quasiparticle, Strong coupling, Energy Engineering and Power Technology, Electronic density of states, Electrical and Electronic Engineering, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Abstract

Within the framework of the Eliashberg theory including the energy-dependent Lorentzian electronic density of states (EDOS), the behavior of the quasiparticle density of states (QDOS) is studied for strong-coupling superconductors. Our numerical calculation shows that when the EDOS has structure it can give an additional structure to the QDOS besides the usual fine structures due to the strong electron-phonon coupling when the carrier concentration has appropriate values. It is also found that the inclusion of the energy-varying EDOS leads to unusual band-filling dependence of the gap ratio 2 Δ 0 / k B T c : The calculation with the band-filling n being varied, reveals that the gap ratio does not necessarily take its maximum value of half-filling, but at a value of n far away from half-filling. This may occur as the electron-phonon coupling becomes very strong.

Published
1996

106. La televisión digital terrestre: experiencias nacionales y diversidad en Europa, América y Asia

Author

Albornoz Espiñeira, Luis Alfonso, García Leiva, María Trinidad, Bustamante, Enrique, Starks, Michael, Fuertes, Marta, Marenghi, Patricia Rita, Badillo, Ángel, Segovia Alonso, Ana Isabel, Crovi Druetta, Delia, Cruz Brittos, Valério, Felkl Prevedello, Carine, Krakowiak, Fernando, Mastrini, Guillermo, Becerra, Martín, Nakamura, Yoshiko, Kumabe, Norio, Weber, Ian, Albornoz Espiñeira, Luis Alfonso, and García Leiva, María Trinidad

Subjects
Televisión, Medios de comunicación, Ciencias de la Información
Abstract

La tradicional televisión por aire encaró la segunda década del siglo XXI enfrentando transformaciones de calado. Su completa digitalización no sólo supone una mejora de la calidad de imagen y sonido, sino que abre las puertas al pluralismo ideológico y la diversidad cultural. Sin embargo, la introducción de la televisión digital terrestre (TDT) muestra que la definición de un modelo televisivo depende, más allá de la tecnología, de las relaciones políticas, económicas, sociales y culturales: mientras que en algunos casos ha servido para sumar agentes o lanzar señales y servicios, en otros reforzó el poder de los operadores tradicionales en un entorno de competencia de soportes (satélite, cable o Internet).El volumen, editado por los especialistas Albornoz y García Leiva y en la que participan destacados investigadores del medio televisivo pertenecientes a prestigiosas universidades y centros especializados en el sector audiovi- sual, analiza la transición hacia la TDT y el “apagón analógico” en algunos de los principales países de Europa (Reino Unido, España y Francia), Améri- ca (EE.UU., México, Brasil y Argentina) y Asia (Japón y China).

Published
2012

107. Numerical simulation of film cooling effect around axisymmetric body in hypersonic flow field

Author

Kurotaki, Takuji, Nakamura, Yoshiko, Kurosaki, Ryujiro, Katayama, Masayuki, and Aso, Shigeru

Subjects
hypersonic boundary layer, thermal protection, numerical analysis, 空力加熱, CFD対風洞相関, film cooling, reentry body, ナビエ･ストークス方程式, numerical flow simulation, Navier Stokes equation, 極超音速境界層, CFD wind tunnel correlation, 宇宙往還機, 熱防御, 極超音速飛翔体, CFD application, 表面熱流束, reentry vehicle, 表面吹出し冷却, 再突入物体, フィルム冷却, 数値解析, tangential blowing cooling, reentry body cooling, 流れ数値シミュレーション, hypersonic flight vehicle, CFD応用, aerodynamic heating, 再突入物体冷却, surface heat flux
Abstract

極超音速流中の軸対称物体における吹出しによるフィルム冷却効果を数値的に調べ、その結果を実験データと比較した。実験は在来型の衝撃風洞を用いて行った。主流マッハ数4.25で、半球状頭部模型の先端に設けたスロットから冷却用ガス(N2)を供給する。吹き出しは模型表面に接する向きで物体表面上の熱伝達を計測した。数値解析では、陰的有限差分解法を用いて軸対称完全ナビエ･ストークス方程式を解いた。時間積分にはLU-SGSを用い、対流項はRoeタイプの流束分割に基くMUSCL型のTVDスキームを用いた。数値解析結果は表面熱流束が著しく減ることを示し、これは実験でも同様で、数値解析と実験とは定性的に一致する。境界層内の流れを詳細に見ると2層から成り、内層は物体表面に沿う断熱壁の役割を果している。これらの特性は、この種の極超音速流におけるフィルム冷却効果の決定に本質的な関わりをもつと考えられる。, Film cooling effects due to mass addition on axisymmetric body in hypersonic flow field are numerically investigated and results of numerical simulation are compared with experimental data. Experiments are conducted by using a conventional shock tunnel. Free stream Mach number is 4.25 and cooling gas (N2) is supplied through the slot located at the nose of a hemisphere model. The direction of mass addition is tangential from the model surface and heat flux around the body is measured. In numerical analysis, axisymmetric full Navier-Stokes equations are solved by an implicit finite difference method. Lower Upper Symmetric Gauss Seidel (LU-SGS) scheme is used for the time integration and convective terms are evaluated by the MUSCL (Monotonic Upstream Schemes for Conservation Laws)-type Total Variation Diminishing (TVD) scheme based on Roe-type flux splitting. Numerical results show significant decreases of surface heat flux which are also obtained in experiments and agreement of numerical and experimental results are qualitatively good. More detailed investigation of the flow inside the boundary layer indicates that the boundary layer consists of two sublayers and that the inner layer plays a role of adiabatic wall structure on the surface. These characteristics are considered most essential in the determination of film cooling effects in this type of hypersonic flow., 資料番号: AA0004174021, レポート番号: NAL SP-27

Published
1994

109. Effects of antiviral therapy for hepatitis C following treatment of hepatocellular carcinoma: survey findings of the Japanese Red Cross Liver Study Group

Author

Joko, Kouji, primary, Goto, Tohru, additional, Watanabe, Hiroshi, additional, Mitsuda, Akari, additional, Uchida, Yasushi, additional, Hasebe, Chitomi, additional, Tsuruta, Shotaro, additional, Kimura, Hiroyuki, additional, Koike, Takero, additional, Akamatsu, Takuji, additional, Mashiba, Toshie, additional, Ochi, Hironori, additional, Nakamura, Yoshiko, additional, Tsuchiya, Kaoru, additional, Kurosaki, Masayuki, additional, and Izumi, Namiki, additional

Published
2015
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111. 超音速飛しょう体頭部形状まわりの空力加熱解析

Author

Katayama, Masayuki, Kurosaki, Ryujiro, Nakamura, Yoshiko, Aso, Shigeru, and Kumasaka, Kazuhiro

Subjects
Physics::Fluid Dynamics
Abstract

Aerodynamic heating analyses have been performed for axisymmetric bodies in the supersonic flow. both experiments using a shock tunnel and the computations corresponding to the experiments are conducted. Heat flux to the bodies such as a hemisphere-cylinder and an ogive-cylinder are measured. Flow conditions are (1) Mach number M infinity = 4.25 (2) Reynolds numbers Re infinity = 2 - 3x105, based on body radius (3) Stagnation temperatures T0 = 500 - 600K (4) Angle of attack alpha = 0 degrees Results of the experiments and the computations are summarized as follows. Heat flux to the hemisphere surface has the maximum value at the stagnation point and decreases smoothly downstream. Also the heat flux to the ogive surface is quite large in the vicinity of the tip and decreases gradually downstream in the case of fully laminar or fully turbulent flow. In the case of the flow including the transition, increase of heat flux caused by the transition of the boundary layer is observed. LU-ADI difference scheme for compressible Navier-Stokes Code has been used for the computations corresponding to the experiments. Computational results show good correlation to the experimental data obtained by the shock tunnel., 資料番号: NALSP0016039, レポート番号: NAL SP-16

Published
1991

113. Manual Intelligence as a Rosetta Stone for Robot Cognition

Author

Ritter, Helge, Haschke, Robert, Röthling, Frank, Steil, Jochen J., Kaneko, Makoto, and Nakamura, Yoshiko

Subjects
Engineering, Point (typography), business.industry, Human–computer interaction, Paradigm shift, Robot, Robotics, Cognition, Artificial intelligence, business, Field (computer science), Motion (physics), Humanoid robot
Abstract

A major unsolved problem is to provide robots with sufficient manual intelligence so that they can seamlessly interact with environments made for humans, where almost all objects have been designed for being acted upon by human hands. With the recent advent of anthropomorphic hand designs whose configuration space begins to approximate that of human hands in a realistic fashion, manual intelligence for robots is rapidly emerging as an exciting interdisciplinary research field, connecting robotics research with advances in the cognitive and brain sciences about the representation and production of dextrous motion. We argue that a thorough understanding of manual intelligence will be basic for our concepts of objects,actions, and the acquisition of new skills, while the rich grounding of manual intelligence in the physical level of interaction may make it much more approachable for analysis than other, “higher level” aspects of intelligence. Therefore, we envisage manual intelligence as a “Rosetta stone” for robot cognition. To substantiate that claim, we present and discuss some of the manifold connections between manual actions and cognitive functions, review some recent developments and paradigm shifts in the field, discuss what we consider major challenges and point out promising directions for future research.

Published
2007

117. No‐Heating Deposition of Ferroelectric x%YO1.5–(100−x%)(Hf1−yZry)O2Films

Author

Mimura, Takanori, Shimura, Reijiro, Tateyama, Akinori, Nakamura, Yoshiko, Shiraishi, Takahisa, and Funakubo, Hiroshi

Abstract

The no‐heating deposition of x%YO1.5–(100−x%)(Hf1−yZry)O2(x= 0−0.09, y= 0, 0.25, 0.50, and 1) is achieved using a radio‐frequency magnetron sputtering method. To investigate the crystal structure and ferroelectric properties, epitaxial films are grown on (111)‐oriented indium tin oxide (ITO)/(111) Y‐stabilized zirconia (YSZ) substrates. The ferroelectric orthorhombic phase is obtained for the 5–7%YO1.5–95–93%HfO2and 5%YO1.5–95% (Hf0.75Zr0.25)O2films. The field‐induced phase transition from tetragonal to orthorhombic is confirmed for the 8%YO1.5–92%HfO2and 5%YO1.5–95%(Hf0.50Zr0.50)O2films. The remnant polarization (Pr) and coercive field (Ec) are 12–19 μC cm−2and 2,000–2,500 kV cm−1, respectively. The piezoelectric response of 1 μm thick films is investigated for 6%YO1.5–94% HfO2, 7%YO1.5–93%HfO2, and 5%YO1.5–95%(Hf0.50Zr0.50)O2films, which have piezoelectric coefficients (d33) of 1.0, 3.3, and 5.0 pm V−1, respectively. These results show no‐heating deposition of x%YO1.5–(100−x%)(Hf1−yZry)O2films with ferroelectric and piezoelectric properties. No‐heating deposition of ferroelectric and piezoelectric films is essential for the fabrication of high‐performance devices to prevent thermal destruction and atomic diffusion of substrate materials. The no‐heating deposition of x%YO1.5–(100−x%)(HfyZr1–y)O2films is investigated using a sputtering method. These films exhibit similar ferroelectric and piezoelectric behaviors to reported annealed films.

Published
2023
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134. Two Cases Successfully Treated with SANO-TO (Senkin-Ho)

Author

KAINUMA, Mosaburo, primary, HIRASAKI, Yoshiro, additional, NOGAMI, Tatsuya, additional, INUTSUKA, Hisashi, additional, MIYASAKA, Fumiji, additional, NAKAMURA, Yoshiko, additional, HORIE, Nobukazu, additional, KIMURA, Hideo, additional, and MITSUMA, Tadamichi, additional

Published
2007
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141. Maintenance of Serum Immunoglobulin G Antibodies to Epstein-Barr Virus (EBV) Nuclear Antigen 2 in Healthy Individuals from Different Age Groups in a Japanese Population with a High Childhood Incidence of Asymptomatic Primary EBV Infection

Author

Harada, Shizuko, primary, Kamata, Yoshio, additional, Ishii, Yasuyuki, additional, Eda, Hiroyuki, additional, Kitamura, Ryo, additional, Obayashi, Maya, additional, Ito, Sayuri, additional, Ban, Fumihiko, additional, Kuranari, Jun, additional, Nakajima, Haruhiko, additional, Kuze, Tomoko, additional, Hayashi, Masao, additional, Okabe, Nobuhiko, additional, Senpuku, Hidenobu, additional, Miyasaka, Nobuyuki, additional, Nakamura, Yoshiko, additional, Kanegane, Hirokazu, additional, and Yanagi, Kazuo, additional

Published
2004
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142. Granulysin in human serum as a marker of cell-mediated immunity

Author

Ogawa, Kazuyuki, primary, Takamori, Yasushi, additional, Suzuki, Kunou, additional, Nagasawa, Masayuki, additional, Takano, Shoichi, additional, Kasahara, Yoshihito, additional, Nakamura, Yoshiko, additional, Kondo, Shigemi, additional, Sugamura, Kazuo, additional, Nakamura, Masataka, additional, and Nagata, Kinya, additional

Published
2003
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