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Fundamental study on mixing layer and horizontal circulation in open-channel flows with rectangular embayment zone

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Journal of Hydrodynamics 2017年第1期29卷 75-88页

作者： michio Sanjou Iehisa Nezu Department of Civil and Earth Resources Engineering Kyoto UniversityKyotoJapan

A part of mean kinetic energy in a main-channel is used for production of a large-scale horizontal circulation in the side cavity. However, the details of the mechanism such as energy transport are poorly understood. Therefore, we conducted PIV mea- surements in a laboratory flume and compared space distributions of mean velocity components and Reynolds stress by varying a cavity geometry. In particular, a practical calculation method of Reynolds stress was also developed and its accuracy was examined by comparison with the measured data. Furthermore, contributions of components in an energy transport equation were revealed quantitatively.

关键词： Embayment open-channel turbulence mixing layer Reynolds stress mean kinetic energy

Numerical prediction of colloidal phase separation by direct computation of Navier–Stokes equation

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npj Computational Materials 2019年第1期5卷 806-814页

作者： michio Tateno Hajime Tanaka Department of Fundamental Engineering Institute of Industrial ScienceUniversity of Tokyo4-6-1 KomabaMeguro-kuTokyo 153-8505Japan

Numerical prediction of out-of-equilibrium processes in soft and bio matter containing liquids is highly ***,it is quite challenging primarily because the motions of the components at different hierarchical levels(e.g.,large colloids and small solvent molecules)are spatio-temporally coupled in a complicated manner via momentum *** we critically examine the predictability of numerical simulations for colloidal phase separation as a prototype example of self-organization of soft materials containing a *** use coarse-grained hydrodynamic simulations to tackle this problem,and succeed in almost perfectly reproducing the structural and topological evolution experimentally observed by three-dimensional confocal microscopy without any adjustable ***,comparison with non-hydrodynamic simulations shows the fundamental importance of many-body hydrodynamic interactions in colloidal phase *** predictive power of our computational approach may significantly contribute to not only the basic understanding of the dynamical behavior and self-organization of soft,bio and active matter but also the computer-aided design of colloidal materials.

关键词： materials. separation hydrodynamic

Muscularis mucosae in desmoplastic stroma formation of early invasive rectal adenocarcinoma

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World Journal of Gastroenterology 2009年第39期15卷 4976-4979页

作者： Shinichi Ban michio Shimizu Department of Pathology Saiseikai Kawaguchi General Hospital Department of Pathology Saitama Medical University International Medical Center

The origin of myofibroblasts or myofibroblastic cells in the desmoplastic stroma associated with carcinoma invasion has been *** the early invasive area of a rectal adenocarcinoma reported here,an obvious transition between the muscularis mucosa and the bundles of eosinophilic stromal cells observed in the carcinomatous stroma was demonstrated both in morphology and in their cytoskeletal phenotype,which conceivably suggests that the smooth muscle cells of the muscularis mucosa could convert to the eosinophilic stromal cells,namely ***,typeⅠprocollagen was demonstrated in both protein and mRNA levels in the areas of eosinophilic stromal cells with a lesser degree of differentiated smooth muscle phenotype that showed a transition from the muscularis mucosa,implying that the myofibroblastic cells converted from smooth muscle cells of the muscularis mucosa could be responsible for typeⅠcollagen *** findings suggest that the muscularis mucosae may not be a passive barrier through which colorectal carcinomas infiltrate into the submucosa,but may play an active role in the formation and remodeling of tumor stroma.

关键词：平滑肌细胞基质细胞结缔组织直肠癌粘膜增生早期纤维母细胞

Importance of hepatitis C virus-associated insulin resistance:Therapeutic strategies for insulin sensitization

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World Journal of Gastroenterology 2010年第16期16卷 1943-1952页

作者： Takumi Kawaguchi michio Sata Department of Digestive Disease Information & Research and Department of Medicine Kurume University School of Medicine

Insulin resistance is one of the pathological features in patients with hepatitis C virus(HCV) ***,persistence of insulin resistance leads to an increase in the risk of life-threatening complications such as cardiovascular ***,these complications are not major causes of death in patients with HCV-associated insulin ***,insulin resistance plays a crucial role in the development of various complications and events associated with HCV *** evidence indicates that HCV-associated insulin resistance may cause(1) hepatic steatosis;(2) resistance to anti-viral treatment;(3) hepatic f ibrosis and esophageal varices;(4) hepatocarcinogenesis and proliferation of hepatocellular carcinoma;and(5) extrahepatic ***,HCV-associated insulin resistance is a therapeutic target at any stage of HCV *** the risk of insulin resistance in HCV-infected patients has been documented,therapeutic guidelines for preventing the distinctive complications of HCV-associated insulin resistance have not yet been *** addition,mechanisms for the development of HCV-associated insulin resistance differ from lifestyle-associated insulin *** order to ameliorate HCV-associated insulin resistance and its complications,the eff icacy of the following interventions is discussed:a late evening snack,coffee consumption,dietary iron restriction,phlebotomy,and zinc *** is known regarding the effect of anti-diabetic agents on HCV infection,however,a possible association between use of exogenous insulin or a sulfonylurea agent and the development of HCC has recently been *** the other hand,insulin-sensitizing agents are reported to improve sustained virologic response *** this review,we summarize distinctive complications of,and therapeutic strategies for,HCVassociated insulin ***,we discuss supplementation with branched-chain amino acids as a unique insulin-sensitiz

关键词： Hepatitis C virus Diabetes mellitus Insulin resistance Complications Treatments Branched-chain amino acid

Application of Brillouin Optical Correlation Domain Analysis for Crack Identification in Concrete Structure

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Photonic Sensors 2013年第4期3卷 377-384页

作者： michio IMAI Satoru MIURA Kajima Technical Research Institute Tokyo 1820036 Japan

This paper investigates the application of distributed optical fiber strain sensors to civil engineering structures, because no other tool can satisfactorily detect the location of the unpredictable phenomenon. In fact, the locations of cracks in the concrete structure are unknown a priori; therefore, a fully distributed sensor is necessary to detect them. The Brillouin optical correlation domain analysis (BOCDA), which offers high spatial resolution by using stimulated Brillouin scattering along the whole length of the optical fiber, is used in a wide range of civil engineering applications, and the same has undergone significant development over the last decade. In this paper, it is demonstrated how a BOCDA-based strain sensor can be employed to monitor cracks in concrete. Crack monitoring on the surface of the concrete member provides useful information for evaluating stiffness and durability of the structure, particularly for early detection of tiny cracks, which is essential for preventing crack growth and dispersion. The crack-induced strain distribution was analytically investigated, and it was proved that BOCDA can identify even a small crack before its visual recognition by a beam test. Moreover, periodical crack monitoring was successfully executed on a pedestrian deck for five years.

关键词：混凝土结构裂缝监测域分析应用光纤应变传感器受激布里渊散射鉴定检测位置

Laparoscopic repair of diaphragmatic hernia associating with radiofrequency ablation for hepatocellular carcinoma:A case report

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World Journal of Clinical Cases 2022年第20期10卷 7020-7028页

作者： Junya Tsunoda Tomohiko Nishi Takafumi Ito Gaku Inaguma Tomohiko Matsuzaki Hiroaki Seki Nobutaka Yasui michio Sakata Akihiko Shimada Hidetoshi Matsumoto Department of Surgery Keiyu HospitalYokohama 220-8521Japan Department of Internal Medicine Keiyu HospitalYokohama 220-8521Japan

BACKGROUND Radiofrequency ablation(RFA)is an effective treatment for early-stage hepatocellular carcinoma(HCC).Although RFA is a relatively safe technique compared with surgery,several complications have been reported to be following/accompanying this *** diaphragmatic hernia caused by RFA is rare;however,the best surgical approach for its treatment is *** present a case of laparoscopic repair of diaphragmatic hernia due to *** SUMMARY An 80-year-old woman with segment VIII HCC was treated twice in 5 years with RFA;28 mo after the second RFA,the patient complained of right hypochondriac *** tomography revealed that the small intestine was incarcerated in the right *** patient was diagnosed with diaphragmatic hernia and underwent laparoscopic repair by non-absorbable running *** patient’s postoperative course was favorable,and the patient was discharged on postoperative day *** diaphragmatic hernia has not recurred 24 mo after *** Laparoscopic treatment of iatrogenic diaphragmatic hernia is effective and minimally invasive.

关键词： Diaphragmatic hernia Radiofrequency ablation Hepatocellular carcinoma Complication Laparoscopic surgery Case report

Krein space representation and Lorentz groups of analytic Hilbert modules

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Science China Mathematics 2018年第4期61卷 745-768页

作者： Yue Wu michio Seto Rongwei Yang School of Insurance Central University of Finance and EconomicsBeijing 100081China National Defense Academy Yokosuka 239-8686Japan Department of Mathematics State University of New York at AlbanyAlbanyNY 12222USA

This paper aims to introduce some new ideas into the study of submodules in Hilbert spaces of analytic functions. The effort is laid out in the Hardy space over the bidisk H^2(D^2). A closed subspace M in H^2(D^2) is called a submodule if ziM ? M(i = 1, 2). An associated integral operator(defect operator) CM captures much information about M. Using a Kre??n space indefinite metric on the range of CM, this paper gives a representation of M. Then it studies the group(called Lorentz group) of isometric self-maps of M with respect to the indefinite metric, and in finite rank case shows that the Lorentz group is a complete invariant for congruence relation. Furthermore, the Lorentz group contains an interesting abelian subgroup(called little Lorentz group) which turns out to be a finer invariant for M.

关键词： Lorentz Hilbert 空间模块度量标准操作员不可分多信息

Motor vehicle accidents: How should cirrhotic patients be managed?

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World Journal of Gastroenterology 2012年第21期18卷 2597-2599页

作者： Takumi Kawaguchi Eitaro Taniguchi michio Sata Division of Gastroenterology Department of Medicine Kurume University School of MedicineKurume 830-0011 Japan Department of Digestive Disease Information and Research Kurume University School of MedicineKurume 830-0011 Japan

Motor vehicle accidents (MVAs) are serious social issues worldwide and driver illness is an important cause of MVAs. Minimal hepatic encephalopathy (MHE) is a com- plex cognitive dysfunction with attention deficit, which frequently occurs in cirrhotic patients independent of severity of liver disease. Although MHE is known as a risk factor for MVAs, the impact of diagnosis and treatment of MHE on MVA-related societal costs is largely unknown. Recently, Bajaj et al demonstrated valuable findings that the diagnosis of MHE by rapid screening using the inhibitory control test (ICT), and subsequent treatment with lactulose could substantially reduce the societal costs by preventing MVAs. Besides the ICT and lactulose, there are various diagnostic tools and therapeutic strategies for MHE. In this commentary, we discussed a current issue of diagnostic tools for MHE, including neuropsychological tests. We also discussed the advantages of the other therapeutic strategies for MHE, such as intake of a regular breakfast and coffee, and supplementation with zinc and branched chain amino acids, on the MVA-related societal costs.

关键词：交通事故肝硬化机动车移动增值业务电信增值服务诊断工具管理认知功能障碍

Numerical and Experimental Studies of an Arc-heated Nonequilibrium Nozzle Flow

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Journal of Thermal Science 2003年第4期12卷 289-293页

作者： michio Nishida Ken-ichi Abe Hisashi Kihara Department of Aeronautics and Astronautics Kyushu University Fukuoka 812-8581 JapanDepartment of Aeronautics and Astronautics Kyushu University Fukuoka 812-8581 JapanDepartment of Aeronautics and Astronautics Kyushu University Fukuoka 812-8581 Japan

The arc-heated high-temperature gas is rotationally and vibrationally excited, and partially dissociated and ionized. When such gas flows inside a nozzle, energy transfers from rotational and vibrational energy modes to translational energy mode, and, in addition, recombination reactions occur. These processes are in thermal and chemical nonequilibrium. The present computations treat arc-heated nonequilibrium nozzle flows using a six temperature model (translational, rotational, N2 vibrational, 02 vibrational, NO vibrational and electron temperatures), and nonequilibrium chemical reactions of air. From the calculated flow properties, emission spectra at the nozzle exit were re-constructed by using the code for computing spectra of high temperature air. On the other hand, measurements of N2^+ (1-) emission spectra were conducted at the nozzle exit in the 20 kW arc-heated wind tunnel. Vibrational and rotational temperatures of N2 were determined using a curve fitting method on N2^+ (1-) emission spectra, with the vibrational and rotational temperatures for N2 and N2^+ being assumed equal. Comparison of the measured and computed results elucidated that the experimental temperatures were larger than the computed ones. At present, we are trying to reveal the main reason for the discrepancy between the computed and measured N2 vibrational and rotational temperatures.

关键词：喷口流量高温气体非平衡流电弧加热气体空气热力学