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Effect of characteristics and distribution of Mg_(17)Al_(12)precipitates on tensile and bending properties of high-Al-containing Mg alloys

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Journal of Magnesium and Alloys 2024年第2期12卷 779-793页

作者： sumi Jo Gyo Myeong Lee Jong Un Lee Young Min Kim Sung Hyuk Park School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Magnesium Korea Institute of Materials ScienceChangwon 51508Republic of Korea

This study investigates the effect of characteristics and distribution of Mg_(17)Al_(12)precipitates on the uniaxial tensile and three-point bending properties of extruded Mg alloys containing high Al *** extruded Mg–9Al–1Zn–0.3Mn(AZ91)alloy contains lamellar-structured Mg_(17)Al_(12)discontinuous precipitates along the grain boundaries,which are formed via static precipitation during natural air *** extruded Mg–11Al–1Zn–0.3Mn(AZ111)alloy contains spherical Mg_(17)Al_(12)precipitates at the grain boundaries and inside the grains,which are formed via dynamic precipitation during *** to inhomogeneous distribution of precipitates,the AZ111 alloy consists of two different precipitate regions:precipitate-rich region with numerous precipitates and finer grains and precipitate-scarce region with a few precipitates and coarser *** AZ111 alloy exhibits a higher tensile strength than the AZ91 alloy because its smaller grain size and more abundant precipitates result in stronger grain-boundary hardening and precipitation hardening effects,***,the tensile elongation of the AZ111 alloy is lower than that of the AZ91 alloy because the weak cohesion between the dynamic precipitates and the matrix facilitates the crack initiation and *** bending,a macrocrack initiates on the outer surface of bending specimen in both *** AZ111 alloy exhibits higher bending yield strength and lower failure bending strain than the AZ91 *** bending specimens of the AZ91 alloy have similar bending formability,whereas those of the AZ111 alloy exhibit considerable differences in bending formability and crack propagation behavior,depending on the distribution and number density of precipitates in the *** bending specimens of the AZ111 alloy,it is found that the failure bending strain(ε_(f,bending))is inversely proportional to the area fraction of precipitates in the outer zone of bending specimen(A_(ppt)),with a relation

关键词： Mg–Al alloy Extrusion Bending Precipitation Microstructure

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Identification of research gaps to improve care for healthy ageing:a scoping review

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Family Medicine and Community Health 2024年第4期12卷 9-16页

作者： Matteo Cesari Marco Canevelli Jotheeswaran Amuthavalli Thiyagarajan Soung-Eun Choi Polina Grushevska Saloni Kumar Muyan Chen Hyobum Jang Yuka sumi Anshu Banerjee Ageing and Health Unit Department of MaternalNewbornChild and Adolescent Health and AgeingWorld Health OrganizationGenevaSwitzerland Department of Neurobiology Care Sciences and SocietyStockholm UniversityStockholmSweden National Center for Disease Prevention and Health Promotion Italian National Institute of HealthRomeItaly Department of Human Neuroscience Sapienza UniversityRomeItaly Master in Health and International Development London School of EconomicsLondonUK Department of Maternal NewbornChild and Adolescent Health and AgeingWorld Health OrganizationGenevaSwitzerland

Objective Several research gaps affect the improvement of care for healthy *** identification is crucial to developing a specific research prioritisation agenda supporting progress at the micro(clinical),meso(service delivery)and macro(system)*** achieve this,a scoping review was carried out to describe the most significant gaps impeding the improvement of care for healthy *** A scoping review of the literature was conducted according to the Joanna Briggs Institute *** selected articles were analysed to identify topics or areas essential for improving care for healthy ageing but requiring further support from *** criteria Every type of scientific article,except for randomised controlled trials,was considered of potential interest without restrictions on publication date,type of publication and *** sources A systematic search(last search:6 December 2023)was conducted using PubMed,MEDLINE and *** Overall,1558 articles were retrieved from the *** these,310 were finally retained for this work.A total of 1195 research gaps were identified(average:3.85 per article)and clustered into the 13 primary areas:ageing,care approach,caregivers,health economics,health,interventions,policies,research,settings,training,technology,specific populations and understanding the older *** particular,research for improving the person-centred approach(n=38),better considering cultural diversities(n=27),implementing integrated care(n=25)and ensuring access to care(n=25)were the most prevalent priorities reported in the *** A wide range of factors spanning multiple disciplines,from clinical to policy levels,require special consideration,exploration and *** findings of this scoping review represent an essential step in identifying gaps for developing a research prioritisation agenda to improve care for healthy ageing.

关键词： policy service supporting

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Survey of international experts on research priorities to improve care for healthy ageing

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Family Medicine and Community Health 2024年第3期12卷 36-39页

作者： Matteo Cesari Yuka sumi Hyobum Jang Jotheeswaran Amuthavalli Thiyagarajan Yejin Lee Rachel Albone Marco Canevelli Monica R Perracini Andrew M Briggs Anshu Banerjee Department of Maternal NewbornChild and Adolescent Health and AgeingWorld Health OrganizationGenevaSwitzerland Department of Clinical Sciences and Community Health University of MilanMilanItaly Department of Human Neuroscience Universitàdegli Studi di Roma La SapienzaRomeItaly Department of Neurobiology Care Sciences and SocietyStockholm UniversityStockholmSweden National Center for Disease Prevention and Health Promotion Italian National Institute of HealthRomeItaly Master's and Doctoral Program in Physical Therapy Universidade Cidade de São PauloSão PauloBrazil Curtin School of Allied Health Curtin enAble InstituteCurtin UniversityPerthWAAustralia

INTRODUCTION The United Nations(UN)Decade of Healthy Ageing(2021–2030),coordinated by the World Health Organization(WHO),1 is a global collaborative initiative aimed at improving the lives of older people,their families and the communities.23 The Action Areas 3(ie,‘deliver person-centred,integrated care and primary health services responsive to older people’)and 4(ie,‘provide access to long-term care(LTC)for older people who need it’)of the Decade’s work programme focus on reorienting health and care systems to promote‘ageing in place’and the delivery of personalised interventions in a seamless continuum of care.

关键词： services ageing centre

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Storylines of family medicine Ⅺ:professional identity formation—nurturing one’s own story

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Family Medicine and Community Health 2024年第S03期12卷 99-108页

作者： William B Ventres Leslie A Stone Hamish J Wilson sumi M Sexton David J Doukas Jessica P Cerdena David M Kelley Michael D Fetters Jeffrey J Haney John J Frey III Family and Preventive Medicine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA General Practice and Rural Health University of Otago Dunedin School of MedicineDunedinNew Zealand Family Medicine Georgetown University School of MedicineWashingtonDistrict of ColumbiaUSA Family and Community Medicine Tulane University School of MedicineNew OrleansLouisianaUSA Family Medicine Residency Program Middlesex HealthMiddletownConnecticutUSA Family Medicine University of Michigan Medical SchoolAnn ArborMichiganUSA Medical Education and Clinical Sciences Washington State UniversitySpokaneWashingtonUSA Family Medicine and Community Health University of Wisconsin-Madison School of Medicine and Public HealthMadisonWisconsinUSA

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 ***‘Ⅺ:professional identity formation—nurturing one’s own story’,authors address the following themes:‘The social construction of professional identity’,‘On becoming a family physician’,‘What’s on the test?—professionalism for family physicians’,‘The ugly doc-ling’,‘Teachers—the essence of who we are’,‘Family medicine research—it starts in the clinic’,‘Socially accountability in medical education’,‘Personal philosophy and how to find it’and‘Teaching and learning with Storylines of Family Medicine’.May these essays encourage readers to find their own creative spark in medicine.

关键词： own becoming professional

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评估大气细颗粒物暴露引起的全球疾病负担的一个综合风险函数

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环境与职业医学 2014年第11期31卷 898-903页

作者： Richard T.Burnett C.Arden Pope III Majid Ezzati Casey Olives Stephen S.Lim sumi mehta Hwashin H.Shin Gitanjali Singh Bryan Hubbell Michael Brauer H.Ross Anderson Kirk R.Smith John R.Balmes Nigel G.Bruce Haidong Kan Francine Laden Annette Prüss-Ustün Michelle C.Turner Susan M.Gapstur W.Ryan Diver Aaron Cohen 何蓉张伊人金泰廙 Health Canada OttawaOntarioCanada Brigham Young University MRC-PHE Centre for Environment and Health School of Public HealthImperial College London School of Public Health University of Washington Institute for Health Metrics and Evaluation Global Alliance for Clean Cookstoves Harvard School of Public Health Harvard University U.S. Environmental Protection Agency Research Triangle Park School of Population and Public Health University of British ColombiaVancouverBritish ColumbiaCanada MRC-PHE Centre for Environment and Health King’s College London University of California BerkeleyBerkeleyCaliforniaUSA School of Medicine University of CaliforniaSan FranciscoSan FranciscoCaliforniaUSA School of Medicine University of CaliforniaBerkeleyBerkeleyCaliforniaUSA Department of Public Health and Policy University of Liverpool School of Public Health Fudan University Exposure Epidemiologyand Risk ProgramDepartment of Environmental HealthHarvard School of Public Health World Health Organization Institute of Population Health University of OttawaOttawaOntarioCanada American Cancer Society AtlantaGeorgiaUSA Health Effects Institute BostonMassachusettsUSA

[背景]评估由于环境空气中细颗粒物（PM2.5）长期暴露引起的疾病负担,需要了解相对风险度（RR）函数的图形和幅度。然而,在世界上很多观察到高PM2.5环境浓度的地方,都缺乏足够的直接证据确定死亡RR函数的图形。[目的]建立可用于全球PM2.... 详细信息

[背景]评估由于环境空气中细颗粒物（PM2.5）长期暴露引起的疾病负担,需要了解相对风险度（RR）函数的图形和幅度。然而,在世界上很多观察到高PM2.5环境浓度的地方,都缺乏足够的直接证据确定死亡RR函数的图形。[目的]建立可用于全球PM2.5暴露范围内成人死因的RR函数：缺血性心脏病（IHD）、脑血管疾病（脑卒中）、慢性阻塞性肺病（COPD）和肺癌（LC）。建立急性下呼吸道感染（ALRI）发病的RR函数,用于估算〈5岁的儿童中死亡率和健康生活损失年数。[方法]通过整合现有的来自于环境空气污染（AAP）、二手烟草烟雾、家用固体烹饪用燃料和主动吸烟（AS）等研究的RR信息,拟合综合暴露-反应（IER）模型。采用颗粒物质的吸入剂量,通过转化AS暴露来估计全年PM2.5的暴露当量。在估算全球环境PM2.5浓度的基础上,得出各国的人群归因分数（PAFs）。[结果]与以往负担评估中使用的其他7种模型相比,IER模型是一种优越的RR预测方法。在不同国家中,归因于AAP暴露的PAF百分数各不相同,分别为：IHD,2~41;脑卒中,1~43;COPD,〈1~21;LC,〈1~25;ALRI,〈1~38。[结论]我们建立了一种以细颗粒物为基础的RR模型,它通过整合来自不同类型的燃烧所产生颗粒物排放的RR信息,涵盖全球范围的暴露。当获得新的RR信息时,可以对这个模型进行更新。

关键词：细颗粒物环境空气污染风险函数全球疾病负担相对风险慢性阻塞性肺病全球环境缺血性心脏病颗粒物质烟草烟雾

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A High Resolution Nonhydrostatic Tropical Atmospheric Model and Its Performance

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Advances in Atmospheric Sciences 2005年第1期22卷 30-38页

作者：沈学顺 Akimasa sumi Center for Numerical Prediction Research Center for Climate System Research

A high resolution nonhydrostatic tropical atmospheric model is developed by using a ready-made regional atmospheric modeling system. The motivation is to investigate the convective activities associated with the tropical intraseasonal oscillation (ISO) through a cloud resolving calculation. Due to limitations in computing resources, a

关键词： high resolution nonhydrostatic model intraseasonal oscillation microphysics convection

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A Position Synchronization Controller for Co-ordinated Links(COOL)Dual Robot Arm Based on Integral Sliding Mode:Design and Experimental Validation

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International Journal of Automation and computing 2021年第1期18卷 110-123页

作者： sumi Phukan Chitralekha Mahanta Department of Electronics and Electrical Engineering Indian Institute of Technology GuwahatiGuwahati 781039India

In this study,a simple position synchronization control algorithm based on an integral sliding mode is developed for dualarm robotic manipulator systems.A first-order sliding surface is designed using cross-coupling error in order to ensure position synchronization of dual-arm *** design objective of the proposed controller is to ensure stability as well as to synchronize the movement of both arms while maintaining the trajectory as *** integral sliding mode eliminates the reaching phase and guarantees robustness throughout the whole operating ***,a low pass filter is used to smoothen the discontinuous element and minimize unwanted *** stability theory is utilized to prove the asymptotic stability of the controlled *** studies are performed to validate the proposed controller′s ***,to investigate the possibility of realizing the proposed dynamic control method in practical applications,experiments are conducted on a 14DoF coordinated links(COOL)dual-arm robotic manipulator *** evidence indicates adequate efficiency in trajectory tracking and guarantees robustness in the presence of parametric uncertainty and external disturbance.

关键词： Integral sliding mode control position synchronization dual-arm robotic manipulator chattering robust control

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中药穴位贴敷联合临床针对性护理对胰腺炎胃肠功能障碍患者的疗效及睡眠质量的影响

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世界睡眠医学杂志 2024年第2期11卷 282-284,288页

作者：张丽文周素密福建医科大学附属泉州第一医院泉州362000

目的:分析中药穴位贴敷联合临床针对性护理对胰腺炎胃肠功能障碍患者的疗效及睡眠质量影响。方法:选取2022年2月至2023年2月福建医科大学附属泉州第一医院消化内科收治的胰腺炎胃肠功能障碍患者108例作为研究对象,按照随机数字表法分为... 详细信息

目的:分析中药穴位贴敷联合临床针对性护理对胰腺炎胃肠功能障碍患者的疗效及睡眠质量影响。方法:选取2022年2月至2023年2月福建医科大学附属泉州第一医院消化内科收治的胰腺炎胃肠功能障碍患者108例作为研究对象,按照随机数字表法分为对照组和观察组,每组54例。对照组给予针对性护理干预,观察组在对照组基础上给予针对性护理联合中药穴位贴敷护理干预。采用匹兹堡睡眠质量指数(PSQI)比较2组患者睡眠质量的差异,并比较2组患者胃肠功能恢复情况及临床疗效。结果:干预后,观察组PSQI评分显著低于对照组,观察组总有效率显著高于对照组,观察组血清淀粉酶和肠鸣音恢复时间、首次自主排便时间、腹胀和腹痛缓解时间显著短于对照组(均P<0.05)。结论:对胰腺炎胃肠功能障碍患者予以中药穴位贴敷联合临床针对性护理,不仅利于促进临床疗效提升,还可改善患者胃肠功能,提高睡眠质量,加速病情康复速度。

关键词：中药穴位贴敷针对性护理胰腺炎胃肠功能障碍睡眠质量

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Improved continuous precipitation kinetics and tensile properties of extruded AZ80 alloy through {10-12} twin formation

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Journal of Magnesium and Alloys 2023年第9期11卷 3323-3337页

作者： Hyun Ji Kim sumi Jo Sung Hyuk Park Department of Materials Science and Metallurgical Engineering Kyungpook National UniversityDaegu 41566the Republic of Korea

This study investigates the effect of{10-12}deformation twins on the continuous precipitation behavior of an extruded Mg-8.0Al-0.5Zn-0.2Mn(AZ80)alloy during *** extruded AZ80 alloy is compressed along the transverse direction to introduce{10-12}twins,followed by an aging treatment at 300℃.The extruded material exhibits a twin-free microstructure with low internal strain energy,whereas the pre-twinned material possesses abundant{10-12}twins and has high internal strain *** aging results reveal that the peak-aging time of the pre-twinned material(1 h)is one-eighth of that of the extruded material(8 h).Although Mg_(17)Al_(12)continuous precipitates(CPs)are observed in both the peak-aged materials,these CPs are much smaller and more densely distributed in the pre-twinned material despite the significantly shorter aging *** CPs size in the peak-aged materials increases in the following order:twinned region in the pre-twinned material(0.47μm)

关键词： AZ80 alloy {10-12}twin Aging Continuous precipitation Tensile properties

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Effect of Gravity on Arc Shape in GTA Welding-for Low Electric Arc Current

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Journal of Materials Science & Technology 2003年第z1期19卷 209-211页

作者： Hidetoshi FUJII Yosuke sumi Manabu TANAKA Kiyoshi NOGI Joining and Welding Research Institute Osaka University 11-1 Mihogaoka Ibaraki Osaka 567-0047 Japan Joining and Welding Research Institute Osaka University 11-1 Mihogaoka Ibaraki Osaka 567-0047 Japan Joining and Welding Research Institute Osaka University 11-1 Mihogaoka Ibaraki Osaka 567-0047 Japan Joining and Welding Research Institute Osaka University 11-1 Mihogaoka Ibaraki Osaka 567-0047 Japan

Gas tungsten arc (GTA) welding was performed both in a microgravity environment and in a terrestrial environment,and the arc shapes in both environments were compared. A microgravity condition was obtained using the free fallsystem at the Japan Microgravity Center. The system can maintain a 10 s microgravity of less than 10-5 g. Awater-cooled Cu plate was used to simplify the arc phenomenon. The electric arc current was between 15 and 80 A,and the shielding and atmospheric gas was 99.9995% Ar and its flowing rate was 10 l/min. The polarity was a directcurrent electrode negative (DCEN). The arc gap was 3 mm and careful attention was also paid to the arc gap in boththe terrestrial and microgravity environments being the same. As a result, it was found that no effect of gravity onthe arc shape is observed under general welding conditions (over 60 A). When the electric arc current is lower than25 A, the arc shape is determined by the initial position of the arc root and is constant with time. Accordingly, itcan not be judged whether or not the arc shape is affected by gravity for this range. When the electric arc current isbetween 25 A and 60 A, it is estimated that the arc shape is not affected by gravity though it is occasionally affectedby other minor effects.

关键词： Microgravity, Arc shape, Gas tungsten arc welding, Water-cooled Cu

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