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5,357 results on '"Hirata Y"'

151. Analysis of a coupling made of shape memory alloy and its dynamic response due to impacts

Author

Nagaya, K. and Hirata, Y.

Subjects
Shape-memory alloys -- Research, Couplings -- Research, Impact -- Research, Science and technology
Abstract

This article presents a method for designing a shape memory alloy coupling between rods subjected to axial or torsional forces. The design formula is obtained analytically by using the stress-strain relation of the shape memory alloy. Since the coupling work is simple, the coupling has advantages for building members in dangerous zones. However, the coupling force is not enough, so that it has disadvantages for impact loads. To design the coupling under the consideration of impacts, this pape? also discusses a transient response of the coupling for various impact loads. Numerical calculations were carried out for some sample problems.

Published
1992

154. Development of high power gyrotron with energy recovery system

Author

Sakamoto, K., primary, Tsuneoka, M., additional, Kasugai, A., additional, Takahashi, K., additional, Maebara, S., additional, Imai, T., additional, Kariya, T., additional, Okazaki, Y., additional, Hayashi, K., additional, Mitsunaka, Y., additional, and Hirata, Y., additional

Published
1995
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155. Tensile-Strain-Dependent Spin States in Epitaxial LaCoO3 Thin Films

Author

Yokoyama, Y., Yamasaki, Y., Taguchi, M., Hirata, Y., Takubo, K., Miyawaki, J., Harada, Y., Asakura, D., Fujioka, J., Nakamura, M., Daimon, H., Kawasaki, M., Tokura, Y., and Wadati, H.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter::Materials Science, Strongly Correlated Electrons (cond-mat.str-el), FOS: Physical sciences, Condensed Matter::Strongly Correlated Electrons
Abstract

The spin states of Co$^{3+}$ ions in perovskite-type LaCoO$_3$, governed by complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which can detect directly. In this letter, we revealed the tensile-strain dependence of spin states, $i. e.$ the ratio of the high- and low-spin states, in epitaxial thin films and a bulk crystal of LaCoO$_3$ via resonant inelastic soft x-ray scattering. The tensile-strain as small as 1.0% was found to realize different spin states from that in the bulk., Comment: 5 pages, 4 figures

Published
2018

157. Femtosecond resonant magneto-optical Kerr effect measurement on an ultrathin magnetic film in a soft X-ray free electron laser

Author

Yamamoto, S., Kubota, Y., Yamamoto, K., Takahashi, Y., Maruyama, K., Suzuki, Y., Hobara, R., Fujisawa, M., Oshima, D., Owada, S., Togashi, T., Tono, K., Yabashi, M., Hirata, Y., Kotsugi, M., Wadati, H., Kato, T., Iwata, S., Shin, S., and Matsuda, I.

Subjects
Condensed Matter::Materials Science, Physics::Optics
Abstract

Time-resolved magneto-optical Kerr effect (MOKE) measurement was demonstrated on a sample of the Au/Fe/Au heterostructure with the Fe layer of 0.35nm thickness under Fe M-edge resonance condition. An ultrabrilliant free electron laser (FEL) in the soft X-ray range was facilitated for the detection of transient signals of resonant MOKE from the ultrathin Fe film. A variation in the Kerr rotation angle was successfully observed on the femtosecond timescale. This technique enables us to reveal the transient magnetization dynamics of such a-few-monolayer magnetic films, which promote the development of spintronic devices.

Published
2018

159. Photoinduced valence dynamics in EuNi2(Si0.21Ge0.79)2 studied via time-resolved x-ray absorption spectroscopy

Author

Yokoyama, Y., primary, Kawakami, K., additional, Hirata, Y., additional, Takubo, K., additional, Yamamoto, K., additional, Abe, K., additional, Mitsuda, A., additional, Wada, H., additional, Uozumi, T., additional, Yamamoto, S., additional, Matsuda, I., additional, Kimura, S., additional, Mimura, K., additional, and Wadati, H., additional

Published
2019
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160. Vanishing Skyrmion Hall Effect at the Angular Momentum Compensation Temperature of a Ferrimagnet

Author

Hirata, Y., primary, Kim, D.-H., additional, Kim, S.K., additional, Lee, D.-K., additional, Oh, S.-H., additional, Kim, D.-Y., additional, Nishimura, T., additional, Okuno, T., additional, Futakawa, Y., additional, Yoshikawa, H., additional, Tsukamoto, A., additional, Tserkovnyak, Y., additional, Shiota, Y., additional, Moriyama, T., additional, Choe, S.-B., additional, Lee, K.-J., additional, and Ono, T., additional

Published
2019
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177. AUTHORS' ADDRESSES

Author

Ahlby, Lena, primary, Aizawa, Michihiko, additional, Akai, Makoto, additional, Akiya, Takaji, additional, Alefeld, Georg, additional, Andersson, J.V., additional, Ando, Yoshimasa, additional, Bäckström, Bernt L., additional, Baehr, Hans Dieter, additional, Bassols, J., additional, Bednarek, N., additional, Bell, J.M., additional, Berntsson, Thore, additional, Blaise, Jean-Claude, additional, Bokelmann, Horst, additional, Bouma, Jos W.J., additional, Burkart, R., additional, Chapon, Christian, additional, Chen, Xian Yu, additional, Cho, Myong Jae, additional, Cochran, Robert W., additional, Coda, P., additional, Cook, F.B., additional, Cuthbert, D.F., additional, Delandre, M., additional, DeVault, Robert C., additional, DeVries, W.A.G., additional, Dutto, Thierry, additional, Eggen, Geir, additional, Endo, Hajime, additional, Endo, N., additional, Enström, Henrik, additional, Ezaki, Toshio, additional, Fairchild, Philip D., additional, Fehle, Rita, additional, Fehrm, Mats Birger, additional, Ferriter, John P., additional, Frivik, Per Erling, additional, Fujii, At sushi, additional, Fujiwara, Ichiro, additional, Fukuda, Tadashi, additional, Fulkerson, William, additional, Furukawa, Tetsuro, additional, Gilles, Ted C., additional, Glas, L.O., additional, Granryd, Eric G.U., additional, Hackensellner, Thomas, additional, Hakuta, Toshikatsu, additional, Halozan, Hermann, additional, Hlawiczka, Helmut, additional, Hamamatsu, Teruhide, additional, Haukås, Hans T., additional, Haramura, Shigenori, additional, Hihara, Eiji, additional, Hino, Toshiyuki, additional, Hirata, Y., additional, Hodgett, David Lowry, additional, Högeberg, M., additional, Honda, Tetsuya, additional, Hoogendoorn, A.J., additional, Hopkirk, Robert J., additional, Igarashi, Seishiro, additional, Iizuka, Hiroshi, additional, Imabayashi, Satosi, additional, Isshiki, Naotsugu, additional, Ito, Yoshiharu, additional, Iwasa, Mizuo, additional, Iwatsubo, T., additional, Kamoshida, Junji, additional, Kannoh, S., additional, Kanzaki, Natsuo, additional, Kashiwagi, Takao, additional, Katayama, Kozo, additional, Kawabata, T., additional, Kawajiri, Kazuhiko, additional, Klas, Jürgen, additional, Koike, Keiji, additional, Koizumi, Hiromasa, additional, Kojima, Susumu, additional, Kondo, Junichi, additional, Kong, Xian Rong, additional, Kubota, Kihachiro, additional, Kunugi, Yoshifumi, additional, Kunugita, Eiichi, additional, Kuroda, J., additional, Kurosawa, Shegekichi, additional, Langreck, J., additional, Laue, Hans Jürgen, additional, Lee, K.W., additional, Le Goff, Pierre Yves, additional, Lin, X.C., additional, Linton, Jeffrey W., additional, Lorentzen, Gustav, additional, Matsuda, Hitoki, additional, Matsue, Junji, additional, Matsuki, Kenji, additional, Mayinger, Franz, additional, Meacham, Howard C., additional, Meunier, Francis E., additional, Meyer-Pittroff, Roland, additional, Miles, Daniel J., additional, Minato, Kazuaki, additional, Minemoto, Masaki, additional, Mori, Taketoshi, additional, Morino, Kimio, additional, Mučić, Vinko, additional, Munakata, Tetsuo, additional, Nagamatsuya, Kotoku, additional, Nagaoka, Yoshikazu, additional, Naito, Daiji, additional, Nakagawa, Hidenobu, additional, Nakaiwa, Masaru, additional, Nakamura, Makoto, additional, Nakazato, Takashi, additional, Nihei, Tetsuya, additional, Nishioka, Junji, additional, Nishiyama, N., additional, Nomura, Hideo, additional, Nowakowski, Gary A., additional, Ogawa, Masato, additional, Ohrt, D., additional, Okuda, Shinji, additional, Ohuchi, Tomihisa, additional, Owa, Masaru, additional, Ozaki, Koichi, additional, Park, H.C., additional, Park, I.H., additional, Petty, S.E., additional, Rasmussen, Robert W., additional, Riegger, Otto K., additional, Rivero, R., additional, Rowles, Peter A., additional, Saikawa, M., additional, Saito, Takamoto, additional, Sagara, Noriyasu, additional, Sanner, Burkhard, additional, Sato, K., additional, Sato, Masahito, additional, Schneider, R., additional, Sekimoto, Yoshitaka, additional, Sekino, Hideo, additional, Sekizaki, Masato, additional, Shelton, Sam V., additional, Shen, Jian Rong, additional, Shimizu, Keiichirou, additional, Shinada, Hiroaki, additional, Shinobu, Yoshiharu, additional, Smale, John G., additional, Strømmen, Ingvald, additional, Suganami, Takuya, additional, Sugimoto, Shigeo, additional, Sugiura, Masaru, additional, Svec, Otto J., additional, Svensson, Torbjörn, additional, Takigawa, Takatoshi, additional, Takahashi, Kenji, additional, Takemoto, Sadatoshi, additional, Takigawa, T., additional, Tamura, Rikuo, additional, Tanaka, Yasuo, additional, Tanii, Tadaaki, additional, Terada, Fusao, additional, Thorbergsen, Even, additional, Tomisaka, Yasushi, additional, Vamling, L., additional, van Gool, Willem, additional, Vellone, R., additional, Wakiyama, Yoshinori, additional, Watanabe, Koichi, additional, Wilson, Robert D., additional, Wu, Chang Chun, additional, Yabe, Akira, additional, Yamaguchi, Kazuaki, additional, Yamashita, Kiyoshi, additional, Yap, S., additional, Yasuda, K., additional, Yoshida, Akio, additional, Yoshida, Hajime, additional, Young, David John, additional, Zanifé, Tahn, additional, and Xian De, Zheng, additional

Published
1990
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180. Non-native Japanese learners’ perception of consonant length in Japanese and Italian

Author

Tsukada, K, Cox, F, HAJEK, J, Hirata, Y, Tsukada, K, Cox, F, HAJEK, J, and Hirata, Y

Abstract

Learners of a foreign language (FL) typically have to learn to process sounds that do not exist in their first language (L1). As this is known to be difficult for adults, in particular, it is important for FL pedagogy to be informed by phonetic research. This study examined the role of FL learners’ previous linguistic experience in the processing of a contrast absent in the L1. The FLs under investigation are Japanese and Italian, which both use contrastive consonant length. Two groups of non-native Japanese (NNJ) learners – L1 Australian English (OZ) and L1 Korean – participated in the consonant length identification task. Neither OZ nor Korean has an underlying consonant length contrast, but Korean has non-contrastive lengthening of tense obstruents with corresponding shorter preceding vowels, which may be beneficial in perceiving consonant length in an FL. We have taken a novel, two-stage approach. First, we compared the perception of Japanese long/geminate and short/singleton consonants by the two groups of NNJ learners. Second, we investigated whether FL Japanese learning by the two groups transfers to the processing of consonant length in an unknown language, Italian. Native speakers of Japanese (NJ) and Italian (NI) were included as controls. They were familiar with contrastive consonant length in their L1, but were naïve to the other language. The NJ and NI groups accurately identified the consonant length category in their L1 but were slightly less accurate in the unknown language. The two NNJ groups were generally accurate (> 80%) in perceiving consonant length not only in Japanese, but also in Italian. However, the direction of NNJ learners’ misperception (i.e. singleton as geminate or geminate as singleton) varied, suggesting that some learners, according to their L1, may categorize length in Japanese and Italian differently rather than uniformly applying the concept of [±long].

Published
2018

181. Element Selectivity in Second-Harmonic Generation of GaFeO3 by a Soft-X-Ray Free-Electron Laser

Author

Yamamoto, S., Omi, T., Akai, H., Kubota, Y., Takahashi, Y., Suzuki, Y., Hirata, Y., Yamamoto, K., Yukawa, R., Horiba, K., Yumoto, H., Koyama, T., Ohashi, H., Owada, S., Tono, K., Yabashi, M., Shigemasa, E., Kotsugi, M., Wadati, H., Kumigashira, H., Arima, T., Shin, S., Matsuda, I., Yamamoto, S., Omi, T., Akai, H., Kubota, Y., Takahashi, Y., Suzuki, Y., Hirata, Y., Yamamoto, K., Yukawa, R., Horiba, K., Yumoto, H., Koyama, T., Ohashi, H., Owada, S., Tono, K., Yabashi, M., Shigemasa, E., Kotsugi, M., Wadati, H., Kumigashira, H., Arima, T., Shin, S., and Matsuda, I.

Abstract

Nonlinear optical frequency conversion has been challenged to move down to the extreme ultraviolet and x-ray region. However, the extremely low signals have allowed researchers to only perform transmission experiments of the gas phase or ultrathin films. Here, we report second harmonic generation (SHG) of the reflected beam of a soft x-ray free-electron laser from a solid, which is enhanced by the resonant effect. The observation revealed that the double resonance condition can be met by absorption edges for transition metal oxides in the soft x-ray range, and this suggests that the resonant SHG technique can be applicable to a wide range of materials.We discuss the possibility of element-selective SHG spectroscopy measurements in the soft x-ray range.

Published
2018

187. Computational design of treatment strategies for proactive therapy on atopic dermatitis using optimal control theory

Author

Christodoulides, P., Hirata, Y., Dominguez-Huttinger, E., Danby, S.G., Cork, M., Williams, H.C., Aihara, K., Tanaka, R., and Engineering & Physical Science Research Council (EPSRC)

Subjects
General Science & Technology, MD Multidisciplinary
Abstract

Atopic dermatitis (AD) is a common chronic skin disease characterised by recurrent skin inflammation and weak skin barrier, and is known to be a precursor to other allergic diseases such as asthma. AD affects up to 25% of children worldwide and the incidence continues to rise. There is still uncertainty about the optimal treatment strategy in terms of choice of treatment, potency, duration and frequency. This study aims to develop a computational method to design optimal treatment strategies for the clinically recommended "proactive therapy" for AD. Proactive therapy aims to prevent recurrent flares once the disease has been brought under initial control. Typically this is done by using an anti-inflammatory treatment such as a potent topical corticosteroid intensively for a few weeks to "get control", followed by intermittent weekly treatment to suppress subclinical inflammation to "keep control". Using a hybrid mathematical model of AD pathogenesis that we recently proposed, we computationally derived the optimal treatment strategies for individual virtual patient cohorts, by recursively solving optimal control problems using a differential evolution algorithm. Our simulation results suggest that such an approach can inform the design of optimal individualised treatment schedules that include application of topical corticosteroids and emollients, based on the disease status of patients observed on their weekly hospital visits. We demonstrate the potential and the gaps of our approach to be applied to clinical settings.

Published
2017

188. Capturing ultrafast magnetic dynamics by time-resolved soft x-ray magnetic circular dichroism

Author

Takubo, Kou, Yamamoto, K., Hirata, Y., Yokoyama, Y., Kubota, Y., Yamamoto, S., Matsuda, I., Shin, S., Seki, T., Takanashi, K., 和達, H., and Wadati, H.

Subjects
Condensed Matter - Materials Science, Materials science, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Scattering, Magnetic circular dichroism, Demagnetizing field, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, 02 engineering and technology, Electron, Instrumentation and Detectors (physics.ins-det), 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Spectral line, Magnet, 0103 physical sciences, Thin film, 010306 general physics, 0210 nano-technology, Absorption (electromagnetic radiation)
Abstract

Experiments of time-resolved x-ray magnetic circular dichroism (Tr-XMCD) and resonant x-ray scattering at a beamline BL07LSU in SPring-8 with a time-resolution of under 50 ps are presented. A micro-channel plate is utilized for the Tr-XMCD measurements at nearly normal incidence both in the partial electron and total fluorescence yield (PEY and TFY) modes at the L2,3 absorption edges of the 3d transition-metals in the soft x-ray region. The ultrafast photo-induced demagnetization within 50 ps is observed on the dynamics of a magnetic material of FePt thin film, having a distinct threshold of the photon density. The spectrum in the PEY mode is less-distorted both at the L2,3 edges compared with that in the TFY mode and has the potential to apply the sum rule analysis for XMCD spectra in pump-probed experiments., Comment: 7 pages, 5 figures

Published
2017
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193. P2.06-31 Inhibition of Heat Shock Protein 70 Function Suppresses Proliferation in Mesothelioma Cells

Author

Sakai, K., primary, Inoue, M., additional, Nishimura, H., additional, Mikami, S., additional, Kuwabara, Y., additional, Kojima, A., additional, Toda, M., additional, Kobayashi, Y., additional, Kikuchi, S., additional, Hirata, Y., additional, Kyoyama, H., additional, Moriyama, G., additional, Gemma, A., additional, and Uematsu, K., additional

Published
2018
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194. 106Gender disparities of distribution of epicardial adipose tissue and its impact on coronary artery disease

Author

Maimaituxun, G, primary, Shimabukuro, M, additional, Fukuda, D, additional, Yagi, S, additional, Hirata, Y, additional, Iwase, T, additional, Matsuura, T, additional, Ise, T, additional, Kusunose, K, additional, Tobiume, T, additional, Yamaguchi, K, additional, Yamada, H, additional, Soeki, T, additional, Wakatsuki, T, additional, and Sata, M, additional

Published
2018
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195. “KAGONMA” NH3 mapping observations of molecular clouds with Nobeyama 45m telescope

Author

Murase, T., primary, Handa, T., additional, Maebata, M., additional, Yang, Z., additional, Hirata, Y., additional, Ishizaki, K., additional, Sunada, K., additional, Nakano, M., additional, Omodaka, T., additional, Shihara, S., additional, Wada, K., additional, Umemoto, T., additional, Matsuo, M., additional, Minamidani, T., additional, Torii, K., additional, Kuno, N., additional, Fujita, S., additional, Kohno, M., additional, Kuriki, M., additional, Nishimura, A., additional, and Tsuda, Y., additional

Published
2018
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197. Electronic Structure of Ce-Doped and -Undoped Nd2CuO4 Superconducting Thin Films Studied by Hard X-Ray Photoemission and Soft X-Ray Absorption Spectroscopy

Author

Horio, M., primary, Krockenberger, Y., additional, Yamamoto, K., additional, Yokoyama, Y., additional, Takubo, K., additional, Hirata, Y., additional, Sakamoto, S., additional, Koshiishi, K., additional, Yasui, A., additional, Ikenaga, E., additional, Shin, S., additional, Yamamoto, H., additional, Wadati, H., additional, and Fujimori, A., additional

Published
2018
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198. Element Selectivity in Second-Harmonic Generation of GaFeO3 by a Soft-X-Ray Free-Electron Laser

Author

Yamamoto, Sh., primary, Omi, T., additional, Akai, H., additional, Kubota, Y., additional, Takahashi, Y., additional, Suzuki, Y., additional, Hirata, Y., additional, Yamamoto, K., additional, Yukawa, R., additional, Horiba, K., additional, Yumoto, H., additional, Koyama, T., additional, Ohashi, H., additional, Owada, S., additional, Tono, K., additional, Yabashi, M., additional, Shigemasa, E., additional, Yamamoto, S., additional, Kotsugi, M., additional, Wadati, H., additional, Kumigashira, H., additional, Arima, T., additional, Shin, S., additional, and Matsuda, I., additional

Published
2018
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200. Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1−xPtxTe2 revealed by resonant x-ray scattering

Author

Takubo, K., primary, Yamamoto, K., additional, Hirata, Y., additional, Wadati, H., additional, Mizokawa, T., additional, Sutarto, R., additional, He, F., additional, Ishii, K., additional, Yamasaki, Y., additional, Nakao, H., additional, Murakami, Y., additional, Matsuo, G., additional, Ishii, H., additional, Kobayashi, M., additional, Kudo, K., additional, and Nohara, M., additional

Published
2018
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