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Microstructure formation and grain refinement of Mg-based alloys by electromagnetic vibration technique

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Transactions of Nonferrous Metals Society of China 2010年第7期20卷 1192-1198页

作者： M.J.LI T.TAMURA N.OMURA k.miwa National Institute of Advanced Industrial Science and Technology Materials Research Institute for Sustainable DevelopmentNagoya 463-8560Japan

The microstructure formation and grains refinement of two Mg-based alloys,***31 and AZ91D,were reported using an electromagnetic vibration(EMV) *** two alloys were solidified at various vibration frequencies and the microstructures were *** average size of grains was quantitatively measured as a function of vibration frequencies. Moreover,the grain size distribution was outlined versus number fraction.A novel model was proposed to account for the microstructure formation and grain refinement when considering the significant difference of the electrical resistivity properties of the solid and the liquid during EMV processing in the semisolid *** remarkable difference originates uncoupled movement between the mobile solid and the sluggish liquid,which can activate melt *** microstructure evolution can be well explained when the fluid flow intensity versus vibration frequency is taken into ***,the influence of the static magnetic field on texture formation is also considered,which plays an important role at higher vibration frequencies.

关键词： magnesium alloy electromagnetic vibration microstructure formation grain refinement solidification

POWER DOPPLER ULTRASONOGRAPHY OF CERVICAL LYMPHADENOPATHY IN HEAD AND NECk CANCER

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POWER DOPPLER ULTRASONOGRAPHY OF CERVICAL LYMPHADENOPATHY IN...

γ-ray Spectroscopy of Hypernuclei:Recent kEk Results and Future Plans at J-PARC

第二届中国国际暨第五届全国口腔颌面外科学术会议

作者： k.YUASA T.NAkANO W．kAGE T.kAWAZU M.SAITO E.NAkAYAMA k.miwa S.kANDA S.OZEkI T.NAGATA M.SHINOHARA T.IkEBE DEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN DEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN FIRST DEPT.OF ORAL AND MAXILLOFACIAL SURGERY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN IDEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN IDEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN IDEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN IDEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN IDEPT.OF ORAL AND MAXILLOFACIAL RADIOLOGY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN FIRST DEPT.OF ORAL AND MAXILLOFACIAL SURGERY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN FIRST DEPT.OF ORAL AND MAXILLOFACIAL SURGERY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN SECOND DEPT.OF ORAL AND MAXILLOFACIAL SURGERY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN SECOND DEPT.OF ORAL AND MAXILLOFACIAL SURGERY FACULTY OF DENTISTRY kYUSHU UNIVERSITY FUkUOkA JAPAN

OBJECTIVE:The aims of this study were to evaluate the usefulness of power Doppler ultrasonography for diagnosing cervical lymphadenopathy and to determine the criteria for differentiating cervical lymph node metastasis from non- *** AND METHODS:During April 1997 and April 1998,187 lymph nodes in 36 patients with head and neck cancer were retrospectively evaluated with power Doppler *** patients were pathologically

关键词： Doppler POWER DOPPLER ULTRASONOGRAPHY OF CERVICAL LYMPHADENOPATHY IN HEAD AND NECk CANCER

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原子核物理评论 2009年第S1期26卷 34-38页

作者： S.Ajimura k.Aoki M.Dairaku H.Fujioka T.Fukuda k.Futatsugawa k.Hosomi W.Imoto M.kawai Y.kakiguchi S.kinoshita T.koike N.Maruyama M.Mimori S.Minami Y.Miura k.miwa Y.Miyagi T.Nagae D.Nakajima H.Noumi k.S hirotori T.Suzuki T.Takahashi T.N.Takahashi k.Tanida N.Terada A.Toyoda k.Tsukada M.Ukai H.Tamura Department of Physics Osaka University High Energy Accelerator Research Organization (kEk) Department of Physics Kyoto University Department of Physics University of Tokyo Osaka Electro-Communication University Department of Physics Tohoku University RIkEN

In this proceeding,we will first outline the experimental setup and main results of the most recent hypernuclear γ-ray spectroscopy experiment (kEk-E566) performed at kEk-PS k6 beam line. The main feature and characteristics of this type of research will be emphasised. After that,the approved experimental proposal (E13) at J-PARC facility will be introduced briefly.

关键词： γ-ray spectroscopy hypernuclei

EXPERIMENTAL STUDY ON THE RELATION OF BED MORPHOLOGY WITH SURFACE FLOW IN MEANDER CHANNELS

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International Journal of Sediment Research 2006年第1期21卷 1-12页

作者： Hajime miwa Faculty of Agriculture Iwate University Japan Prof.

Alternate bars have the property that they migrate downstream whenever floods occur. However, in meander channels whose bend angles are larger than a critical value, the migration of bars can be suppressed, and the positions of bank erosion and flood attack also will be steady. In this study, the bed morphology in flume channels with bends of various lengths and angles is investigated at various flow discharges, and the relation of bed morphology to surface flow is investigated in detail using fluid measuring software. An effort is made to obtain guidelines for the plane shape design of meander channels. Based on the experimental results of bed topography and measurement of surface flow direction and velocity distribution, from the viewpoint of bank erosion and the concentration and dispersion of flood flow the most suitable plane shape for meandering channels is suggested through which the migration of alternate bars is suppressed.

关键词： Meander channel Alternate bars Particle Tracking Velocimetry (PTV) Particle Image Velocimetry (PIV)

A Fine-Grained Runtime Power/Performance Optimization Method for Processors with Adaptive Pipeline Depth

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Journal of Computer Science & Technology 2011年第2期26卷 292-301页

作者：姚骏 Shinobu miwa Hajime Shimada Shinji Tomita Graduate School of Information Science Nara Institute of Science and Technology School of Engineering Tokyo University of Agriculture and Technology Graduate School of Informatics Kyoto University Institute for Integrated Cell-Material Sciences Kyoto University

Recently, a method known as pipeline stage unification （PSU） has been proposed to alleviate the increasing energy consumption problem in modern microprocessors. PSU achieves a high energy efficiency by employing a changeable pipeline depth and its working scheme is eligible for a fine control method. In this paper, we propose a dynamic method to study fine-grained program interval behaviors based on some easy-to-get runtime processor metrics. Using this method to determine the proper PSU configurations during the program execution, we are able to achieve an averaged 13.5% energydelay-product （EDP） reduction for SPEC CPU2000 integer benchmarks, compared to the baseline processor. This value is only 0.14% larger than the theoretically idealized controlling. Our hardware synthesis result indicates that the proposed method can largely decrease the hardware overhead in both area and delay costs, as compared to a previous program study method which is based on working set signatures.

关键词： dynamic optimization energy saving fine-grained pipeline stage unification workload analysis

Numerical simulation of low-flow channel evolution due to sediment augmentation

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International Journal of Sediment Research 2012年第3期27卷 351-361页

作者： Hiroshi miwa Gary PARkER Department of Civil Engineering Maizuru National College of Technology Department of Civil and Environmental Engineering University of Illinois at Urbana-Champaign

For the conservation and restoration of river environment,a sediment replenishment technique, which conveys a part of the sediments excavated and/or dredged from reservoirs to the river below dams is developed and has been implemented tentatively in several *** placed as replenishment can be flushed out and transported downstream by floodwater or dam *** flushed sediments are expected to contribute to the control of degradation and the variation of the low-flow ***,this technique is in the development stage because there are many unknown ***,systematic investigations are necessary for practical management of the *** this study,the effects of the location of replenishment sediment on sediment flushing and on control of degradation were investigated by means of flume experiments.A two-dimensional numerical model was also developed to further investigate the effects of sediment augmentation on river *** numerical model treats bank erosion and sediment transport over fixed beds. The simulation results were verified against the experimental *** flushing process of replenishment sediment was investigated first,and then its effect as a countermeasure for river bed degradation was *** are summarized as follows:(1) Augmentation at upper riffles is effective for flushing of replenishment sediment and variation of low-flow channel.(2) Amelioration of degradation can be found in the cases of two types of *** amelioration effect of upper riffle placement was larger than that of lower riffle placement(3) Aggradation rate of the bed near the replenishment site in the fixed bed is large in the lower riffle placement compared with the upper riffle placement.(4) The numerical model was found to be generally successful as a predictive tool.

关键词： River restoration Low-flow channel Degradation Sediment replenishment Numerical simulation

Effects of kampo medicine hangebyakujutsutemmato on persistent postural-perceptual dizziness:A retrospective pilot study

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World Journal of Clinical Cases 2022年第20期10卷 6811-6824页

作者： Toru miwa Shin-ichi kanemaru Department of Otolaryngology-Head and Neck Surgery Osaka Metropolitan UniversityOsaka 5458585Japan Department of Otolaryngology-Head and Neck Surgery Tazuke Kofukai Medical Research InstituteKitano HospitalOsaka 5308480Japan Department of Otolaryngology-Head and Neck Surgery Kyoto UniversityKyoto 7507501Japan

BACkGROUND Persistent postural-perceptual dizziness(PPPD)is a functional disorder,typically preceded by acute vestibular *** is characterized by a shift in processing spatial orientation information,to favor visual over vestibular and somatosensory inputs,and a failure of higher cortical *** date,no therapies for PPPD have been *** medicine hangebyakujutsutemmato(HBT)has been reported to alleviate disturbances of *** hypothesized that HBT would be a beneficial treatment for *** To examine the efficacy of HBT for the treatment of *** Patients with PPPD were enrolled and divided into two groups:The HBT group(n=24)and the non-HBT group(n=14).The participants completed questionnaire surveys[Niigata PPPD questionnaire(NPQ),dizziness handicap inventory,hospital anxiety and depression scale(HADS),orthostatic dysregulation questionnaire,pittsburg sleep quality index(PSQI),and motion sickness scores]before and after HBT ***,to identify HBT responders,multivariate regression analysis was performed using the results of the ques-tionnaire surveys and equilibrium tests;including stabilometry,and caloric,vestibular evoked myogenic response,and head-up tilt *** Thirty-eight outpatients were included in this study,of which 14 patients(3 men,11 women;mean age,63.5±15.9 years)received treatment without HBT,and 24(1 man,23 women;mean age,58.2±18.7 years)received combination treatment with *** HBT treatment,NPQ scores decreased significantly(baseline 40.1±10.0 vs 2 mo 24.6±17.7,P<0.001).No statistically significant changes were observed in the NPQ scores in the non-HBT group(baseline 38.6±12.2 vs 2 mo 39.4±14.4,P=0.92).Multivariable regression analysis revealed that the results of stabilometry(P=0.02)and the caloric(P=0.03),and head-up tilt tests(P<0.001),HADS(P=0.003),and PSQI(P=0.01)were associated with HBT responsiveness in PPPD *** HBT may be an effective adjunct therapy fo

关键词： Hangebyakujutsutemmato kampo medicine Persistent postural-perceptual dizziness Niigata persistent postural-perceptual dizziness questionnaire score Sensory reweighting Treatment responder

Experimental investigation on effective aerosol scavenging using different spray configurations with pre-injection of water mist for Fukushima Daiichi decommissioning

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Nuclear Science and Techniques 2024年第5期35卷 154-172页

作者： Rui-Cong Xu Avadhesh kumar Sharma Erdal Ozdemir Shuichiro miwa Shunichi Suzuki Department of Nuclear Engineering and Management The University of Tokyo7‑3‑1 HongoBunkyo‑KuTokyo 113‑8656Japan Nuclear Professional School The University of Tokyo2‑2

During the decommissioning of the Fukushima Daiichi nuclear power plant,it is important to consider the retrieval of resolidified debris both in air and underwater *** the subsequent retrieval of debris from the reactor building,the resolidified debris must be cut into smaller pieces using various cutting *** the cutting process,aerosol particles are expected to be generated at the submicron *** has been noted that such aerosols sizing within the Greenfield gap(0.1-1μm)are difficult to remove effectively using traditional spraying ***,to improve the aerosol removal efficiency of the spray system,a new aerosol agglomeration method was recently proposed,which involves injecting water mist to enlarge the sizes of the aerosol particles before removing them using water *** this study,a series of experiments were performed to clarify the proper spray configurations for effective aerosol scavenging and to improve the performance of the water *** experimental results showed that the spray flow rate and droplet characteristics are important factors for the aerosol-scavenging efficiency and performance of the water *** results obtained from this study will be helpful for the optimization of the spray system design for effective aerosol scavenging during the decommissioning of the Fukushima Daiichi plant.

关键词： Fukushima Daiichi decommissioning Aerosol scavenging Multiphase flow Spray system Aerosol-mist agglomeration

Hepatitis B:Who should be treated?-managing patients with chronic hepatitis B during the immune-tolerant and immunoactive phases

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World Journal of Gastroenterology 2021年第43期27卷 7497-7508页

作者： miwa kawanaka ken Nishino Hirofumi kawamoto ken Haruma Department of General Internal Medicine 2 General Medical CenterKawasaki Medical SchoolOkayama 700-8505Japan

New hepatitis B virus(HBV)infections are decreasing owing to improved antiviral therapy and increased HBV vaccination worldwide;however,the number of HBV infections remains a major cause of liver *** triggers cytotoxic immunity to eliminate HBV-infected ***,the HBV pathophysiology changes in persistently infected individuals depending on host immune responses and HBV DNA proliferation *** prevent liver cirrhosis and carcinogenesis caused by HBV,it is important to treat HBV infection at an early *** treatment is recommended for the immunoactive hepatitis B surface-antigen-positive and-negative phase,but not during the immune-inactive phase or immune-tolerant phase;instead,follow-up is ***,these patients should be monitored through regular blood tests to accurately diagnose the immune-inactive or-tolerant *** treatment regimen should be determined based on the age,sex,family history of liver cancer,and liver fibrosis status of *** treatment is often recommended due to various problems during the immune-tolerant *** review compares the four major international practice guidelines,including those from the Japanese Society of Hepatology,and discusses strategies for chronic hepatitis B treatment during the immune-tolerant,immune-inactive,and resolved ***,recommended hepatitis B antiviral therapy and follow-up protocols are discussed.

关键词： Hepatitis B Immune tolerance Immune-inactive Anti-viral therapy Hepatocellular carcinoma Cirrhosis