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Storylines of family medicine Ⅱ:foundational building blocks—context,community and health

Family Medicine and Community Health 2024年第S3期12卷 12-22页

作者： William B Ventres Leslie A Stone Rupal Shah Tamala Carter Geoffrey M Gusoff Winston Liaw Bich-May Nguyen Joanna V Rachelson Mary Alice Scott Teresa L Schiff-Elfalan seiji Yamada Robert C Like Kathleen Zoppi A Peter Catinella Richard M Frankel Shailendra Prasad Family and Preventive Medicine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA Bridge Lane Group Practice LondonUK Penn Center for Community Health Workers University of PennsylvaniaPhiladelphiaPennsylvaniaUSA National Clinician Scholars Program UCLA David Geffen School of MedicineLos AngelesCaliforniaUSA Health Systems and Population Health Sciences University of Houston Tilman J Fertitta Family College of MedicineHoustonTexasUSA Southern New Mexico Family Medicine Residency Program Las CrucesNew MexicoUSA New Mexico Primary Care Training Program Silver CityNew MexicoUSA Anthropology New Mexico State UniversityLas CrucesNew MexicoUSA Family Medicine and Community Health University of Hawai'i at Manoa John A Burns School of MedicineHonoluluHawaiiUSA Family Medicine and Community Health Rutgers Robert Wood Johnson Medical SchoolNew BrunswickNew JerseyUSA Family Medicine Indiana University School of MedicineIndianapolisIndianaUSA Family Medicine–Transmountain Texas Tech University Health Sciences CenterEl PasoTexasUSA Medicine Indiana University School of MedicineIndianapolisIndianaUSA Family Medicine and Community Health University of Minnesota Medical School-Twin Cities CampusMinneapolisMinnesotaUSA

Storylines of Family Medicine is a 12-part series of thematically linked mini-essays with accompanying illustrations that explore the many dimensions of family medicine,as interpreted by individual family physicians and medical educators in the USA and elsewhere around the ***‘Ⅱ:foundational building blocks—context,community and health’,authors address the following themes:‘Context—grounding family medicine in time,place and being’,‘Recentring community’,‘Community-oriented primary care’,‘Embeddedness in practice’,‘The meaning of health’,‘Disease,illness and sickness—core concepts’,‘The biopsychosocial model’,‘The biopsychosocial approach’and‘Family medicine as social medicine.’May readers grasp new implications for medical education and practice in these essays.

关键词： thematic illustration dimensions

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Progress in numerical simulation of cavitating water jets

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Journal of Hydrodynamics 2013年第4期25卷 502-509页

作者： PENG Guoyi SHIMIZU seiji College of Engineering Nihon University

This paper reviews recent progress made toward modeling of cavitation and numerical simulation of cavitating water jets. Properties of existing cavitation models are discussed and a compressible mixture flow method for the numerical simulation of high- speed water jets accompanied by intensive cavitation is introduced. Two-phase fluids media of cavitating flow are treated as a homo- geneous bubbly mixture and the mean flow is computed by solving Reynolds-Averaged Navier-Stokes （RANS） equations for com- pressible fluid. The intensity of cavitation is evaluated by the gas volume fraction, which is governed by the compressibility of bubble-liquid mixture corresponding to the status of mean flow field. Numerical results of cavitating water jet issuing from an orifice nozzle are presented and its applicability to intensively cavitating jets is demonstrated. However, the effect of impact pressure caused by collapsing of bubbles is neglected, and effectively coupling of the present compressible mixture flow method with the dynamics of bubbles remains to be a challenge.

关键词： cavitation water jet multi-phase flow numerical simulation

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Analysis of Laser-Induced Plume During Disk Laser Welding at Different Speeds

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Plasma Science and Technology 2013年第8期15卷 821-824页

作者：王腾高向东 Katayama seiji School of Electromechanical Engineering Guangdong University of Technology School of Computer South China Normal University Joining and Welding Research Institute Osaka University

During high power disk laser welding, the high-speed photography was used to measure the dynamic images of the laser-induced plume at different laser welding speeds. Various plume features （area, height and brightness） were extracted from the images by the color space clustering algorithm. Combined with observation on the surface and the cross sections of welding samples, the effect of welding speed on welding stability was analyzed. From the experimental results, it was found that these features of plume could reflect the welding state. Thus changes of the plume features corresponded to different welding speeds, which was helpful for monitoring the laser welding stability.

关键词： disk laser welding laser-induced plume stability high-speed photography different welding speeds

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Numerical analysis of cavitation cloud shedding in a submerged water jet

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Journal of Hydrodynamics 2016年第6期28卷 986-993页

作者： Guoyi PENG 杨从新 Yasuyuki OGUMA seiji SHIMIZU Department of Mechanical Engineering College of Engineering Nihon University School of Energy and Power Engineering Lanzhou University of Technology

Focused on the unsteady behavior of high-speed water jets with intensive cavitation a numerical analysis is performed by applying a practical compressible mixture flow bubble cavitation model with a simplified estimation of bubble radius. The mean flow of two-phase mixture is calculated by unsteady Reynolds averaged Navier-Stokes （URANS） for compressible flow and the intensity of cavitation in a local field is evaluated by the volume fraction of gas bubbles whose radius is estimated with a simplified Rayleigh- Plesset equation according to pressure variation of the mean flow field. High-speed submerged water jet issuing from a sheathed sharp-edge orifice nozzle is treated. The periodically shedding of cavitation clouds is captured in a certain reliability compared to experiment data of visualization observation and the capability to capture the unsteadily shedding of cavitation clouds is demonstrated. The results demonstrate that cavitation takes place near the entrance of nozzle throat and cavitation cloud expands consequentially while flowing downstream. Developed bubble clouds break up near the nozzle exit and shed downstream periodically along the shear layer. Under the effect of cavitation bubbles the decay of core velocity is delayed compared to the case of no-cavitation jet.

关键词： cavitation bubble dynamics submerged water jet two-phase flow turbulent flow

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3D Computation of Hydrogen-Fueled Combustion around Turbine Blade-Effect of Arrangement of Injector Holes

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Journal of Thermal Science 2006年第3期15卷 233-239页

作者： Makoto YAMAMOTO Junichi ikeda Kazuaki INABA Department of Mechanical Engineering Tokyo University of Science 1-3 KagurazakaShinjuku-kuTokyo162-8601Japan Graduate School of Mechanical Engineering Tokyo University of Science 1-3 KagurazakaShinjuku-kuTokyo162-8601Japan

Recently, a number of environmental problems caused from fossil fuel combustion have been focused on. In addition, with the eventual depletion of fossil energy resources, hydrogen gas is expected to be an alternative energy resource in the near future. It is characterized by high energy per unit weight, high reaction rate, wide range of flammability and the low emission property. On the other hand, many researches have been underway in several countries to improve a propulsion system for an advanced aircraft. The system is required to have higher power, lighter weight and lower emissions than existing ones. In such a future propulsion system, hydrogen gas would be one of the promising fuels for realizing the requirements. Considering these backgrounds, our group has proposed a new cycle concept for hydrogen-fueled aircraft propulsion system. In the present study, we perform 3 dimensional computations of turbulent flow fields with hydrogen-fueled combustion around a turbine blade. The main objective is to clarify the influence of arrangement of hydrogen injector holes. Changing the chordwise and spanwise spacings of the holes, the 3 dimensional nature of the flow and thermal fields is numerically studied.

关键词： computational fluid dynamics turbine blade hydrogen combustion injector hole arrangement

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Modelling of a shape memory alloy actuator for feedforward hysteresis compensator considering load fluctuation

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CAAI Transactions on Intelligence Technology 2022年第4期7卷 549-560页

作者： seiji Saito Shouta Oka Ribun Onodera Department of Electronics and Information Science Polytechnic UniversityKodairaTokyoJapan

This paper presents a hysteresis mathematical model of a shape memory alloy(SMA)actuator for feedforward hysteresis *** hysteresis model represents the relation between temperature,stress,and electric ***,based on the laws of thermodynamics,the hysteresis model of the SMA actuator is ***,the inverse of the hysteresis model is obtained to produce a compensator for non‐linear characteristics such as hysteresis and ***,the parameters of the hysteresis model are obtained from each experiment under constant load and constant temperature,and the model validity is confirmed by comparing experimentally obtained ***,the inverse model is applied to a part of feedforward hysteresis *** order to verify the effectiveness of the proposed model as hysteresis compensator,an electrical resistance control using feedback-feedforward control was conducted by numerical *** simulation results indicate advantages of the proposed mathematical model in hysteresis compensation of SMA actuator,and demonstrate that the model is capable of handling load fluctuation.

关键词： hysteresis inverse thermodynamics

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Creation of crystal structure reproducing X-ray diffraction pattern without using database

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npj Computational Materials 2023年第1期9卷 946-954页

作者： Joohwi Lee Junpei Oba Nobuko Ohba seiji Kajita Toyota Central R&D Labs. Inc.41-1 YokomichiNagakuteAichi 480-1192Japan

When a sample’s X-ray diffraction pattern(XRD)is measured,the corresponding crystal structure is usually determined by searching for similar XRD patterns in the ***,if a similar XRD pattern is not found,it is tremendously laborious to identify the crystal structure even for *** case commonly happens when researchers develop novel and complex *** this study,we propose a crystal structure creation scheme that reproduces a given XRD *** employed a combinatorial inverse design method using an evolutionary algorithm and crystal morphing(Evolv&Morph)supported by Bayesian optimization,which maximizes the similarity of the XRD patterns between target one and those of the created crystal *** sixteen different crystal structure systems with twelve simulated and four powder target XRD patterns,Evolv&Morph successfully created crystal structures with the same XRD pattern as the target(cosine similarity 99%for the simulated ones and>96%the experimentally measured ones).Furthermore,the present method has merits in that it is an automated crystal structure creation scheme,not dependent on a *** believe that Evolv&Morph can be applied not only to determine crystal structures but also to design materials for specific properties.

关键词： properties crystal structure

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Novel inspection of welded joint microstructure using magneto-optical imaging technology

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Chinese Physics B 2017年第5期26卷 209-214页

作者：高向东李正文游德勇 seiji Katayama School of Electromechanical Engineering Guangdong University of Technology Joining and Welding Research Institute Osaka University 11-1 Mihogaoka

A novel method for measuring differences of microstructure by advanced use of the Faraday magneto-optical effect is proposed. Two groups of YAG laser welds on Q235 have been investigated in order to compare MO imaging and traditional methods. Microstructure images have been compared with MO images, and MO diagrams display different colors and gray scales for the base metal, the weld zone, and the heat affected zone. Experimental results indicate that the welded joint microstructure can be inspected by MO imaging without metallographic preparation.

关键词： welded inspection magneto colors welding magnetization coercivity pixel rotation captured

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Retinal ganglion cell protection by hop-flower extract as a novel neuroprotective strategy for glaucoma

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Neural Regeneration Research 2022年第6期17卷 1267-1268页

作者： Tomoko Hasegawa Hanako Ohashi ikeda Department of Ophthalmology and Visual Sciences Kyoto University Graduate School of MedicineKyotoJapan Research Fellow of Japan Society for the Promotion of Science TokyoJapan

In glaucoma,a leading cause of blindness,retinal ganglion cells are progressively *** pressure reduction is the only established treatment for glaucoma(Collaborative Normal-Tension Glaucoma Study Group,1998;Vass et al.,2007).However,in some cases,visual field loss progresses despite sufficiently reduced intraocular pressure(Collaborative Normal-Tension Glaucoma Study Group,1998;Killer and Pircher,2018).While intraocular pressure and age are known risk factors for glaucoma(Ernest et al.,2013),the underlying mechanisms of glaucoma progression are not fully understood.

关键词： glaucoma al. protective

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Study of Dynamic Features of Surface Plasma in High-Power Disk Laser Welding

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Plasma Science and Technology 2012年第3期14卷 245-251页

作者：王腾高向东 Katayama seiji 金小莉 Faculty of Electromechanical Engineering Guangdong University of Technology School of Computer South China Normal University Joining and Welding Research Institute Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

High-speed photography was used to obtain the dynamic changes in the surface plasma during a high-power disk laser welding process. A color space clustering algorithm to extract the edge information of the surface plasma region was developed in order to improve the accuracy of image processing. With a comparative analysis of the plasma features, i.e., area and height, and the characteristics of the welded seam, the relationship between the surface plasma and the stability of the laser welding process was characterized, which provides a basic understanding for the real-time monitoring of laser welding.

关键词： plasma feature color image processing disk laser welding

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