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Design Study of Top Lid with Clamp Structure in JT-60SA Cryostat

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Plasma Science and Technology 2013年第2期15卷 188-191页

作者： Shigetoshi nakamura Yusuke K. SHIBAMA Kei MASAKI Akira SAKASAI Japan Atomic Energy Agency Mukouyama 801-1 Naka Ibaraki 311-0193 Japan

JT-60SA is a fully superconducting coil tokamak upgraded from the JT-60U. This paper focused on the integrity of the top lid of cryostat in JT-60SA. The design requirement for the cryostat in normal operations is to achieve vacuum insulation of 10-1 Pa, and the top flange of the top lid is lightly welded onto its body flange. The weld is tensile-loaded by bending deformation of the top lid due to vacuum pressure of external 0.1 MPa. This weld integrity is evaluated with tensile-load reduction, which results in clamp reinforcement. The structural integrity of the top lid is validated.

关键词： clamp vacuum insulation top lid cryostat JT-60SA

Biological properties of self-assembled nanofibers of elastin-like block polypeptides for tissue-engineered vascular grafts:platelet inhibition,endothelial cell activation and smooth muscle cell maintenance

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Regenerative Biomaterials 2023年第1期10卷 386-395页

作者： Kazuki Natsume Jin nakamura Kazuhide Sato Chikara Ohtsuki Ayae Sugawara-Narutaki Department of Materials Chemistry Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan Department of Biological Functions Engineering Graduate School of Life Science and Systems EngineeringKyushu Institute of TechnologyFukuoka 808-0196Japan Institute for Advanced Research Nagoya UniversityNagoya 464-8601Japan Department of Respiratory Medicine Graduate School of MedicineNagoya UniversityNagoya 466-8560Japan Department of Energy Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

Strategic materials design is essential for the development of small-diameter,tissue-engineered vascular ***-assembled nanofibers of elastin-like polypeptides represent promising vascular graft components as they replicate the organized elastin structure of native blood ***,the bioactivity of nanofibers can be modified by the addition of functional peptide *** the present study,we describe the development of a novel nanofiber-forming elastin-like polypeptide(ELP)with an arginine-glutamic acid-aspartic acid-valine(REDV)*** biological characteristics of the REDV-modified ELP nanofibers relevant to applications in vascular grafting were compared to ELP without ligands for integrin,ELP with arginine-glycine-aspartic acid(RGD)sequence,collagen and cell culture *** them,REDV-modified ELP nanofibers met the preferred biological properties for vascular graft materials,i.e.(i)inhibition of platelet adhesion and activation,(ii)endothelial cell adhesion and proliferation and(iii)maintenance of smooth muscle cells in a contractile phenotype to prevent cell *** results indicate that REDV-modified ELP nanofibers represent promising candidates for the further development of small-diameter vascular grafts.

关键词： elastin-like polypeptide nanofiber platelet endothelial cell smooth muscle cell

Magnetic Behavior of Some Rare-Earth Transition-Metal Perovskite Oxide Systems

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Journal of Rare Earths 2004年第6期22卷 733-738页

作者： Kenji Yoshii Akio nakamura Masaichiro Mizumaki Naoshi Ikeda Jun'ichiro Mizuki Japan Atomic Energy Research Institute Mikazuki Hyogo 679-5148 JapanJapan Atomic Energy Research Institute Tokai-mura Ibaraki 305-1195 JapanJapan Synchrotron Radiation Research Institute Mikazuki Hyogo 679-5198 JapanJapan Synchrotron Radiation Research Institute Mikazuki Hyogo 679-5198 JapanJapan Atomic Energy Research Institute Mikazuki Hyogo 679-5148 Japan

Magnetic properties were investigated for the rare-earth 3d-transition metal oxides with the perovskite structure. Intriguing magnetic phenomena were reviewed for a few systems:magnetization peak effect in the titanates, magnetization reversal in the chromites and metallic ferromagnetism in the cobaltites. The results suggest an important role of the rare-earth ions for the magnetic properties of such complex oxides.

关键词： perovskite oxide magnetic properties rare earth transition metal

On fluorescence imaging:The diffusion equation model and recovery of the absorption coefficient of fluorophores

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Science China Mathematics 2022年第6期65卷 1179-1198页

作者： Jijun Liu Manabu Machida Gen nakamura Goro Nishimura Chunlong Sun School of Mathematics Southeast UniversityNanjing 210096China Institute for Medical Photonics Research Hamamatsu University School of MedicineHamamatsu 431-3192Japan Department of Mathematics Hokkaido UniversitySapporo 060-0810Japan Research Institute for Electronic Science Hokkaido UniversitySapporo 060-0810Japan

To quantify fluorescence imaging of biological tissues,we need to solve an inverse problem for the coupled radiative transfer equations which describe the excitation and emission fields in biological *** begin by giving a concise mathematical argument to derive coupled diffusion equations with the Robin boundary condition as an approximation of the radiative transfer *** by using this coupled system of equations as a model for the fluorescence imaging,we have a nonlinear inverse problem to identify the absorption coefficient in this *** associated linearized inverse problem is to ignore the absorbing effect on the excitation *** firstly establish the estimates of errors on the excitation field and the solution to the inverse problem,which ensures the reasonability of the model approximation *** numerical verification is presented to show the validity of such a linearizing process ***,based on the analytic expressions of excitation and emission fields,the identifiability of the absorption coefficient from the linearized inverse problem is rigorously analyzed for the absorption coefficient in the special form,revealing the physical difficulty of the3-dimensional imaging model by the back scattering diffusive system.

关键词： fluorescence imaging diffusion equation inverse problem linearization error estimates identifiability

Unusual spontaneous improvement in Asian variant of intravascular large B-cell lymphoma

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Open Journal of Internal Medicine 2012年第1期2卷 15-18页

作者： Takashi Ninomiya Toru nakamura Nobuharu Fujii Akio Hiraki shigeki Umemura Hiromichi Yamane Atsuko Shirakawa Haruhito Kamei Department of Hematology Oncology and Respiratory Medicine Okayama University Hospital Okayama Japan Department of Hematology Oncology and Respiratory Medicine Okayama University Hospital Okayama Japan Department of Medicine Sumitomo-Besshi Hospital Niihama Japan Department of Medicine Sumitomo-Besshi Hospital Niihama Japan Department of Pathology Sumitomo-Besshi Hospital Niihama Japan

The clinical course of the Asian variant of intravascular large B-cell lymphoma (AIVL) is generally very aggressive. We describe a case of AIVL demonstrating an unusual clinical course, with spontaneous improvement. An 81-year-old man with high-grade fever and thrombocytopenia was admitted to our hospital. Although we could not confirm the origin of his symptoms, they disappeared completely without intervention within 2 weeks. Three months later, however, thrombocytopenia reappeared and progressed. Finally, he was readmitted due to a subdural hemorrhage with high fever and he finally died of rapidly progressive multiple organ failure. Autopsy findings revealed the presence of B-cell lymphoma cells in microscopic vessels of many organs as well as hemophagocytosis in the bone marrow. He was diagnosed with AIVL with an unusual indolent clinical course with spontaneous improvement.

关键词： Lymphoma Intravascular Large B-Cell Lymphoma Spontaneous Improvement Hemophagocytosis

Application of FEM Analysis to Braced Excavation

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Tsinghua Science and Technology 2008年第S1期13卷 40-45页

作者：李明飞 Atsushi nakamura 蔡飞 Keizo Ugai FORUM8 Co. Ltd. Department of Civil and Environmental Engineering Gunma University

It is becoming possible to do detailed numerical analyses for the various mechanical behavior of braced excavation by researching and developing the numerical analysis technique such as the finite element method (FEM). However, the mechanical behavior of braced excavation has not been clarified fully both in theory and in experience. Therefore, improving the prediction accuracy during the prior design is very important for making the observational method of braced excavation more effective. In this paper, FEM analyses were performed for a model of braced excavation by using Geotechnical Finite Element Elasto-plastic Analysis Software, GeoFEAS (2D). As the constitutive law of ground, MC-DP model, and Duncan-Chang model were applied. The results were compared and discussed with that of a site measurement, and the effects of the constitutive law of ground on the analyzed result were verified. For the difference between the results, the reason was investigated by the analyses adjusting the elastic modulus of ground, and the appropriate application of the constitutive law was researched.

关键词： numerical analysis retaining wall finite element method (FEM) constitutive law

Mechanism and active sites of CO oxidation over single-crystal Au surfaces and a Au/TiO_2(110) model surface

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Chinese Journal of Catalysis 2016年第10期37卷 1676-1683页

作者： Tadahiro Fujitani Isao nakamura 日本国立产业技术综合研究所

We describe the reaction mechanism and active sites for CO oxidation over a Au/TiO2（110） model surface and Au single‐crystal surfaces, along with the role of H2O, on a molecular scale. At low tem‐perature （＆lt;320 K）, H2O played an essential role in promoting CO oxidation, and the active site for CO oxidation was the perimeter of the interface between the gold nanoparticles and the TiO2 sup‐port （Auδ＋–Oδ––Ti）. We believe that the O–O bond was activated by the formation of OOH, which was produced directly from O2 and H2O at the perimeter of the interface between the gold nanoparticles and the TiO2 support, and consequently OOH reacted with CO to form CO2. This reaction mechanism explains the dependence of the CO2 formation rate on O2 pressure at 300 K. In contrast, at high temperature （＆gt;320 K）, low‐coordinated gold atoms built up on the surface as a result of surface reconstruction due to exposure to CO. The low‐coordinated gold atoms adsorbed O2, which then dissociated and oxidized CO on the metallic gold surface.

关键词： Gold Model catalyst CO oxidation Reaction mechanism Active sites

An extended Fibonacci sequence associated with the discrete hungry Lotka-Volterra system

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International Journal of Biomathematics 2017年第3期10卷 245-260页

作者： Masato Shinjo Kanae Akaiwa Masashi Iwasaki Yoshimasa nakamura Graduate School of Informatics Kyoto University Yoshida-Hommachi Sakyo-ku Kyoto 606-8501 Japan Faculty of Life and Environmental Sciences Kyoto Prefectural University Nakaragi-cho Shimogamo Sakyo-ku Kyoto 606-8522 Japan

The integrable hungry Lotka-Volterra （hLV） system stands for a prey-predator model in mathematical biology. The discrete-time hLV （dhLV） system is derived from a time discretization of the hLV system. The solution to the dhLV system is known to be represented by using the Casorati determinant. In this paper, we show that if the entries of the Casorati determinant become an extended Fibonacci sequence at the initial discrete time, then those are also an extended Fibonacci sequence at any discrete time. In other words, the extended Fibonacci sequence always appears in the entries of the Casorati determinant under the time evolution of the dhLV system with suitable initial setting. We also show that one of the dhLV variables converges to the ratio of two successive extended Fibonacci numbers as the discrete time goes to infinity.

关键词： Fibonacci sequence Casorati determinant discrete hungry Lotka Volterra system.

Duplication cyst of the small intestine found by double-balloon endoscopy:A case report

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World Journal of Gastroenterology 2008年第24期14卷 3924-3926页

作者： Haruei Ogino Toshiaki Ochiai Norimoto nakamura Daisuke Yoshimura Teppei Kabemura Tetsuya Kusumoto Hiroshi Matsuura Akihiko Nakashima Kuniomi Honda Kazuhiko nakamura Department of Internal Medicine Saiseikai Fukuoka General Hospital Department of Surgery Saiseikai Fukuoka General Hospital Department of Pathology Saiseikai Fukuoka General Hospital Department of Medicine and Bioregulatory Science Graduate School of Medical SciencesKyushu University

A 35-year-old man was admitted due to bloody stool and anemia. The bleeding source could not be detected by esophagogastroduodenoscopy or colonoscopy. Double balloon endoscopy (DBE) revealed a diverticulum-like hole in which coagula stuck in the ileum at 1 meter on the oral side from the ileocecal valve. The adjacent mucosa just to the oral side of the hole was elevated like a submucosal tumor. The lesion was considered the source of bleeding and removed surgically. It was determined to be a cyst with an ileal structure on the mesenteric aspect accompanying gastric mucosa. The diagnosis was a duplication cyst of the ileum,which is a rare entity that can cause gastrointestinal bleeding. In the present case,DBE was used to fi nd the hemorrhagic duplication cyst in the ileum.

关键词： Duplication cyst Double-balloonendoscopy Small intestine bleeding