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Assessment of Flow Drive by Use of Ion Bernstein Wave on Heliotron J and EAST Devices

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Plasma Science and Technology 2006年第1期8卷 125-128页

作者： YukiTORII HiroyukiOKADA Tetsuo WATARI Hiroki KITAGAWA YasuhiroSUZUKI MasayukiYOKOYAMA 赵燕平 Kazunobu NAGASAKI Institute of Advanced Energy Kyoto UniversityUjiJapan National Institute for Fusion Science TokiJapan Graduate School of Energy Science Kyoto UniversityKyotoJapan Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

The possibility of driving poloidal flows by use of ion Bernstein wave is assessed for Heliotron J and EAST devices by means of ray tracing analysis. Sheared poloidal flow is expected to suppress plasma turbulences due to the decorrelation of the waves. In Heliotron J and EAST plasma, the rays of Ion Bernstein Wave travel into the central region with oscillations along the magnetic lines of force and their power is absorbed by ions at the cyclotron resonance layers. The momentum input has been estimated by calculating the momentum change of rays and the poloidal flow has been estimated using neoclassical viscosities. The wave momentum changes its sign as it propagates inward, depositing sheared momentum to the plasma, and therefore causes sheared poloidal flows.

关键词： Heliotron J EAST ion Bernstein wave

The Optimal Design of TMD for Offshore Structures

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China Ocean Engineering 1999年第2期14卷 133-144页

作者： Sau Lon James HU Tomotsuka TAKAYAMA Dept. of Ocean Engrg. University of Rhode Island RI02881 Professor Professor Disaster Prevention Res. Inst. Kyoto Univ. Gokasho Uji Kyoto 611-0011 Japan.

This paper presents the optimal design procedure of Tuned Mass Damper (TMD) for reducing vibration of an actual steel jacket offshore platform excited by random wave loading. In this study, a frequency domain is taken. The force on the structure is determined by use of the linearized Morison equation for an input Power Spectral Density (PSD) of wave elevation. The sensitivity of optimum values of TMD to characteristic parameters of random wave spectrum is analyzed. An optimized TMD design for the modeled platform is given based on design conditions and the findings of the study.

关键词： tuned mass damper design Morison equation power spectral density offshore structures

A modified generalized scaling law for the similitude of dynamic strain in centrifuge modeling

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Earthquake Engineering and Engineering Vibration 2023年第3期22卷 589-600页

作者： Ma Qiang Ling Daosheng Meng Di Kyohei Ueda Zhou Yanguo MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Institute of Geotechnical EngineeringCenter for Hypergravity Experiment and Interdisciplinary ResearchZhejiang UniversityHangzhou 310058China Disaster Prevention Research Institute Kyoto UniversityGokashoUjiKyoto 611-0011Japan

Soil strain is the key parameter to control the elasto-plastic deformation and even the failure *** overcome the defect that the strain of the model soil is always smaller than that of the prototype in Iai′s generalized scaling law(GSL),a modified scaling law was proposed based on Iai′s GSL to secure the same dynamic shear strain between the centrifuge model and the prototype by modulating the amplitude and frequency of the input motion at the base.A suite of dynamic centrifuge model tests of dry sand level ground was conducted with the same overall scaling factor(λ=200)under different centrifugal accelerations by using the technique of“modeling of models”to validate the modified *** test results show that the modified GSL could achieve the same dynamic strain in model as that of the prototype,leading to better modeling for geotechnical problems where dynamic strain dominates the response or failure of ***,the applicability of the proposed scaling law and possible constraints on geometry scaling due to the capability limits of existing centrifuge shaking tables are discussed.

关键词： deep deposit seismic response generalized scaling law centrifuge model test

Plasticity of Xyloglucan Composition in Bean （Phaseolus vulgaris）-Cultured Cells during Habituation and Dehabituation to Lethal Concentrations of Dichlobenil

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Molecular Plant 2010年第3期3卷 603-609页

作者： A. Alonso-Simon L. Neumetzler R Garcia-Angulo A.E. Encina J.L. Acebes J.M. Alvarez T. Hayashi Area de Fisiologia Vegetal Universidad de Leon E-24071 Leon Spain Max Planck Institute of Molecular Plant Physiology 14476 Golm Germany Kyoto University RISH Gokasho Uji Kyoto 611-0011 Japan

Bean cells that have been habituated to grow in a lethal concentration （12 μM） of 2,6-dichlorobenzonitrile （dichlobenil or DCB, a cellulose biosynthesis inhibitor） are known to have decreased cellulose content in their cell walls. Xyloglucan, which is bound to cellulose and together with it forms the main loading network of plant cell walls, has also been described to decrease in habituated cells, but whether the change on cellulose affects the xyloglucan structure besides its abundance has not been analyzed. Fragmentation analysis with xyloglucan-specific endoglucanase （XEG） and endocellulase revealed that habituation to DCB caused a change in the fine structure of xyloglucan, namely a decrease in fucosyl residues attached to the galactosyl-xylosyl residues along the glucan backbone. After the removal of herbicide from the medium （dehabituated cells）, xyloglucan recovered its fucosyl residues. In addition, some cello-oligosaccharides could be detected only in habituated cells＇ xyloglucan digested by XEG and endocellulase, corresponding to a glucan co- valently bound or co-precipitated with the hemicelluloses. These results show that structural flexibility of cell walls relies in part on the plasticity of xyloglucan composition and opens up new perspectives to further research in this field.

关键词： Bean 2,6-dichlorobenzonitrile habituation and dehabituation OLIMP (Oligosaccharides Mass Profiling) xyloglucan.

Chiral Synthesis of the Key Intermediate of Diterpenoids

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Chinese Chemical Letters 1997年第11期8卷 949-950页

作者： Hao, XJ Node, MB Fuji, KR Chinese Acad Sci Kunming Inst Bot Kunming 650204 Peoples R China Kyoto Pharmaceut Univ Yamashima Ku Kyoto 607 Japan Kyoto Univ Inst Chem Res Uji 611 Japan

(-)-Methyl(4R, 5S, 10R)-14-methoxypodocarpa-8, 11, 13-triene-19-oate(1), which is the key intermediate for synthesis of diterpenoids, was synthesized from (R)-(+)-2-methyl-2-(2`-nitrovinyl)-delta-valerolactone(2).

关键词： ADDITION ELIMINATION PROCESS NITROOLEFINATION LACTONES

Evaluation of random errors of displacements and velocities from strong motion records

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Evaluation of random errors of displacements and velocities ...

Rayleigh scattering studies on inter-layer interactions in structure-defined individual double-wall carbon nanotubes

中国地球物理学会第二十九届年会

作者： Peiliang Xu Disaster Prevention Research Institute Kyoto University Uji

＜正＞Strong motion accelerographs have been deployed worldwide to monitor the ground shaking of the Earth and the recorded accelerograms have been used to recover the velocities and displacements by integration. In spite of their fundamental importance in seismology and earthquake engineering, few works address the error

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Nano Research 2014年第10期7卷 1548-1555页

作者： Sihan Zhao Tomoya Kitagawa Yuhei Miyauchi Kazunari Matsuda Hisanori Shinohara Ryo Kitaura Department of Chemistry & Institute forAdvanced Research Nagoya University Nagoya 464-8502 Japan Institute of Advanced Energy Kyoto University Uji Kyoto 511-0011 Japan Japan Science and Technology Agency PRESTO Saitama 332-0012 Japan

Although the inter-layer coupling in layered materials has attracted considerable interest due to its importance in determining physical properties of two- dimensional systems, studies on the inter-layer coupling in one-dimensional systems have so far been limited. Double-wall carbon nanotubes （DWCNTs） are one of the most fundamental and ideal model systems to study the interqayer coupling in one-dimensional systems. In this work, Rayleigh scattering spectroscopy and transmission electron microscopy are used to characterize the electronic transition between inner-and outer-nanotubes of the exactly same individual DWCNT. We find that the interqayer coupling is strong, leading to downshifts in most of the optical transition energies （up to -0.2 eV） compared to isolated CNTs. We also find that the presence of metallic tubes lead to stronger shifts. The inter-layer screening of Coulomb interactions is one of the key factors in explaining the observed results.

关键词： inter-layer coupling one-dimensional system electronic properties double-wall carbonnanotubes (DWCNTs) dielectric screening

Xyloglucan for Generating Tensile Stress to Bend Tree Stem

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Molecular Plant 2009年第5期2卷 893-903页

作者： Kei'ichi Baba Yong Woo Park Tomomi Kaku Rumi Kaida Miyuki Takeuchi Masato Yoshida Yoshihiro Hosoo Yasuhisa Ojio Takashi Okuyama Toru Taniguchi Yasunori Ohmiya Teiji Kondo Ziv Shani Oded Shoseyov Tatsuya Awano Satoshi Serada Naoko Norioka Shigemi Norioka Takahisa Hayashi Kyoto University RISH Gokasho Uji Kyoto 611-0011 Japan Graduate School of Bioagricultural-Sciences Nagoya University Nagoya 464-8601 Japan Forest Tree Breeding Center Hitachi Ibaraki 319-1301 Japan CBD Technologies Rehovot 76100 Israel Division of Forest and Biomaterials Science Kyoto University Kyoto 606-8502 Japan Graduate School of Frontier Biosciences Osaka University Suita Osaka 565-0871 Japan Institute of Sustainability Science Kyoto University Gokasho Uji Kyoto 611-0011 Japan

In response to environmental variation, angiosperm trees bend their stems by forming tension wood, which consists of a cellulose-rich G （gelatinous）-Iayer in the walls of fiber cells and generates abnormal tensile stress in the secondary xylem. We produced transgenic poplar plants overexpressing several endoglycanases to reduce each specific polysaccharide in the cell wall, as the secondary xylem consists of primary and secondary wall layers. When placed horizontally, the basal regions of stems of transgenic poplars overexpressing xyloglucanase alone could not bend upward due to low strain in the tension side of the xylem. In the wild-type plants, xyloglucan was found in the inner surface of G-layers during multiple layering. In situ xyloglucan endotransglucosylase （XET） activity showed that the incorporation of whole xyloglucan, potentially for wall tightening, began at the inner surface layers S1 and S2 and was retained throughout G-layer development, while the incorporation of xyloglucan heptasaccharide （XXXG） for wall loosening occurred in the primary wall of the expanding zone. We propose that the xyloglucan network is reinforced by XET to form a further connection between wall-bound and secreted xyloglucans in order to withstand the tensile stress created within the cellulose G-layer micro fibrils.

关键词： G-layer tensile stress xyloglucan xyloglucan endotransglucosylase

Earthquake engineering research needs in light of lessons learned from the 2011 Tohoku earthquake

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Earthquake Engineering and Engineering Vibration 2014年第S1期13卷 141-149页

作者： Masayoshi Nakashima Oren Lavan Masahiro Kurata Yunbiao Luo Disaster Prevention Research Institute (DPRI) Kyoto University Professor Disaster Prevention Research Institute (DPRI) Kyoto UniversityGokashoUjiKyotoJapan Faculty of Civil and Environmental Engineering Technion–Israel Institute of TechnologyHaifaIsrael Assistant Professor Post Doctoral Fellow

Earthquake engineering research and development have received much attention since the first half of the twentieth century. This valuable research presented a huge step forward in understanding earthquake hazard mitigation,which resulted in appreciable reduction of the effects of past earthquakes. Nevertheless,the 2011 Tohoku earthquake and the subsequent tsunami resulted in major damage. This paper presents the timeline of earthquake mitigation and recovery,as seen by the authors. Possible research directions where the authors think that many open questions still remain are identified. These are primarily based on the important lessons learned from the 2011 Tohoku earthquake.

关键词： research needs earthquake engineering quick recovery 2011 Tohoku earthquake