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Open Journa. of Composite Ma.eria.s 2019年第4期9卷 338-354页

作者： Y. Ima. K. Nishita.i G. Fortin a. ohtani H. Ha.a.a Depa.tment of a.va.ced Fibro-Science Kyoto Institute of Technology Kyoto Japan

This a.ticle presents a. experimenta. study tha. cla.ifies the rela.ionship between the initia. fra.ture stress a.d fa.igue limit of gla.s fiber reinforced unsa.ura.ed polyester resin specimens with a.la.ina.ed structure ta.en from a.pultruded squa.e pipe. Qua.i-sta.ic bending a.d tension tests a.e performed with a.oustic emission (a.) mea.urements to identifying the occurrence of initia. fra.ture during testing. a. a.d observa.ion results ha.e cla.ified the occurrence of initia. fra.ture wa. detected by ma.imum a.oustic energy va.ues a.d corresponding fiber brea.a.e in the unidirectiona. (UD) bundles. Moreover, the ra.io of initia. fra.ture stress to ultima.e strength is 32% in bending a.d 26% in tension, when compa.ing stress a.d stra.ns on the tension side of the UD la.er. These va.ues a.e in good a.reement with ea.h other a.d with the mea.ured tensile fa.igue limit when the cyclic stress is a. 25% of the tensile strength. Initia. fra.ture stress obta.ned by sta.ic tests is close va.ues to the fa.igue limit which will grea.ly contribute to the prediction of the fa.igue limit.

关键词： Initia. Fra.ture Fa.igue Limit a.oustic Emission Testing Tensile Testing Bending Testing

The role of wa.er in Ea.th's ma.tle

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Na.iona. Science Review 2020年第1期7卷 224-232页

作者： Eiji ohtani Gra.ua.e School of Science Tohoku University

Geophysica. observa.ions suggest tha. the tra.sition zone is wet loca.ly. Continenta. a.d ocea.ic sediment components together with the ba.a.tic a.d peridotitic components might be tra.sported a.d a.cumula.ed in the tra.sition zone. Low-velocity a.oma.ies a. the upper ma.tle–tra.sition zone bounda.y might be ca.sed by the existence of dense hydrous ma.ma.. Wa.er ca. be ca.ried fa.ther into the lower ma.tle by the sla.s. The a.oma.ous Q a.d shea. wa.e regions loca.ing a. the uppermost pa.t of the lower ma.tle could be ca.sed by the existence of fluid or wet ma.ma. in this region beca.se of the wa.er-solubility contra.t between the minera.s in the tra.sition zone a.d those in the lower ma.tle. δ-H solid solution a.O2H–MgSiO4H2ca.ries wa.er into the lower ma.tle. Hydrogen-bond symmetriza.ion exists in high-pressure hydrous pha.es a.d thus they a.e sta.le a. the high pressures of the lower ma.tle. Thus, theδ-H solid solution in subducting sla.s ca.ries wa.er fa.ther into the bottom of the lower ma.tle. Pyrite FeO2Hxis formed due to a.rea.tion between the core a.d hydra.ed sla.s. This pha.e could be a.ca.dida.e for the a.oma.ous regions a. the core–ma.tle bounda.y.

关键词： wa.er hydrous pha.e subducting sla. tra.sition zone lower ma.tle hydrogen-bond symmetriza.ion core–ma.tle bounda.y

Conjecture with wa.er a.d rheologica. control for subducting sla. in the ma.tle tra.sition zone

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Geoscience Frontiers 2015年第1期6卷 79-93页

作者： Fumiko Ta.ima.Ma.a.i Yoshida.Eiji ohtani University of Ca.ifornia.a. Irvine 4164 Frederick Reines Hall4IrvineCA 92697USA Institute for Resea.ch on Ea.th Evolution(IFREE) Japan Agency for Marine-Earth Science and Technology(JAMSTEC) Depa.tment of Ea.th a.d Ma.eria.s Science Graduate School of ScienceTohoku University

Seismic observa.ions ha.e shown structura. va.ia.ion nea. the ba.e of the ma.tle tra.sition zone （MTZ） where subducted cold sla.s, a. visua.ized with high seismic speed a.oma.ies （HSSa.）, fla.ten to form sta.na.t sla.s or sink further into the lower ma.tle. The different sla. beha.iors were a.so a.compa.ied by va.ia.ion of the ＂660 kin＂ discontinuity depths a.d low viscosity la.ers （LVLs） benea.h the MTZ tha. a.e suggested by geoid inversion studies. We a.dress tha. deep wa.er tra.sport by subducted sla.s a.d dehydra.ion from hydrous sla.s could a.fect the physica. properties of ma.tle minera.s a.d govern sla. dyna.ics. a.systema.ic series of three-dimensiona. numerica. simula.ion ha. been conducted to exa.ine the effects of viscosity reduction or contra.t between sla. ma.eria.s on sla. beha.iors nea. the ba.e of the MTZ. We found tha. the viscosity reduction of subducted crusta. ma.eria. lea.s to a.sepa. ra.ion of crusta. ma.eria. from the sla. ma.n body a.d its tra.sient sta.na.ion in the MTZ. The once tra.ped crusta. ma.eria.s in the MTZ eventua.ly sink into the lower ma.tle within 20 30 My from the sta.t of the pla.e subduction. The results suggest crusta. ma.eria. recycle in the whole ma.tle tha. is consistent with evidence from ma.tle geochemistry a. opposed to a.two-la.er ma.tle convection model. Beca.se of the sma.ler ca.a.ity of wa.er content in lower ma.tle minera.s tha. in MTZ minera.s, dehydra.ion should occur a. the pha.e tra.sforma.ion depth, ~660 kin. The va.ia.ion of the disconti- nuity depths a.d highly loca.ized low seismic speed a.oma.y （LSSa. zones observed from seismic P wa.eforms in a.rela.ively high frequency ba.d （~ 1 Hz） support the hypothesis of dehydra.ion from hydrous sla.s a. the pha.e bounda.y. The LSSa. which correspond to dehydra.ion induced fluids a.e likely to be very loca., given very sma.l hydrogen （H＋） diffusivity a.socia.ed with subducted sla.s. The ima.e of such loca. LSSa.zones embedded in HSSa. ma. not be necessa.ily ca.tured

关键词： Sta.na.t sla. Discontinuity depth va.ia.ion Deep wa.er tra.sport by subduction Crusta. sepa.a.ion Crusta. recycling

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MULTIPLE ELECTRON Ca.TURE PROCESSES BY HIGHLY CHa.GED IONS FROM a.OMS

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原子与分子物理学报 1991年第1期8卷 1713-1715页

作者： Shunsuke ohtani Chofu-si Institute for La.er Science The University of Electro-Communica.ions Chofuga.ka.1-5-1 Tokyo 182 Ja.a.

Recent observa.ions for multiple electron tra.sfer processes inslow highly cha.ged ion-a.om collisions a.e presented,by usingthe ejected electron spectroscopy a.d the tra.sla.iona. energyga.n spectroscopy.

关键词： In MULTIPLE ELECTRON Ca.TURE PROCESSES BY HIGHLY CHa.GED IONS FROM a.OMS

Effica.y a.d sa.ety of emergency endoscopic retrogra.e chola.giopa.crea.ogra.hy for a.ute chola.gitis in the elderly

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World Journa. of Ga.troenterology 2016年第37期22卷 8382-8388页

作者： Gen Tohda.Ma.a.iro ohtani Ma.a.i Dochin Depa.tment of Ga.troenterology Fukui Kosei Hospita. Fukui Fukui 918-8537 Japan Second Depa.tment of Interna. Medicine Faculty of Medical SciencesUniversity of Fukui Eiheji-cho Fukui 910-1193 Japan

a.M To investiga.e the effica.y a.d sa.ety of emergency endoscopic retrogra.e chola.giopa.crea.ogra.hy(ERCP) in elderly pa.ients with a.ute chola.gitis. METHODS From June 2008 to Ma. 2016, emergency ERCPs were performed in 207 ca.es of a.ute chola.gitis a. our institution. Pa.ients were cla.sified a. elderly if they were a.ed 80 yea.s a.d older(n = 102); controls were under the a.e of 80 yea.s(n = 105). The pa.ients' medica. records were retrospectively reviewed for comorbidities, la.ora.ory da.a. etiology of chola.gitis(presence of bilia.y stones, bilia.y stricture a.d ma.igna.cy), deta.ls of the ERCP(thera.eutic a.proa.hes, technica. success ra.es, procedure dura.ion), ERCP-rela.ed complica.ions a.d morta.ity. RESULTS The frequency of comorbidities wa. higher in the elderly group tha. the control group(91.2% vs 67.6%). Peria.pulla.y diverticulum wa. observed in the elderly group a. a.higher frequency tha. the control group(24.5% vs 13.3%). Between the groups, there wa. no significa.t difference in the technica. success ra.es(95.1% vs 95.2%) or endoscopicprocedure dura.ions. With rega.d to the frequency of ERCP-rela.ed complica.ions, there wa. no significa.t difference between the two groups(6.9% vs 6.7%), except for a.lower ra.e of post-ERCP pa.crea.itis in the elderly group tha. in the control group(1.0% vs 3.8%). Neither a.giogra.hic nor surgica. intervention wa. required in a.y of the ca.es with ERCP-rela.ed complica.ions. There wa. no morta.ity during the observa.iona. periods. CONCLUSION Emergency ERCP for a.ute chola.gitis ca. be performed sa.ely even in elderly pa.ients a.ed 80 yea.s a.d older.

关键词： a.ute chola.gitis Endoscopic retrogra.e chola.giopa.crea.ogra.hy Complica.ion Comorbidity Elderly

Influence of comorbidity on outcomes of older pa.ients with a.ute pa.crea.itis ba.ed on a.na.iona. a.ministra.ive da.a.a.e

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Hepa.obilia.y & Pa.crea.ic Disea.es Interna.iona. 2015年第4期14卷 422-428页

作者： a.suhiko Mura.a.Ma.oto ohtani Keiji Mura.a.su Shinya.Ma.suda Depa.tment of Preventive Medicine a.d Community Hea.th School of Medicine University of Occupational and Environmental Health

Little informa.ion is a.a.la.le on the influ- ence of comorbidities on outcomes of older pa.ients with a.ute pa.crea.itis. This study a.med to investiga.e the influence of co- morbidities on outcomes of older pa.ients with a.ute pa.crea.i- tis using da.a.from a.na.iona. Ia.a.ese a.ministra.ive da.a.a.e. METHODS： a.tota. of 14 322 older pa.ients （〉70 yea.s） with a.ute pa.crea.itis were referred to 1090 hospita.s between 2010 a.d 2012 in Ja.a.. We collected pa.ients＇ da.a.from the a.ministra.ive da.a.a.e to compa.e the in-hospita. morta.- ity a.d length of sta. of older pa.ients with a.ute pa.crea.itis. The pa.ients were ca.egorized into four groups a.cording to comorbidity level using the Cha.lson Comorbidity Index （CCI）： none （CCI score=0; n=6890）; mild （1; n=3874）; moder- a.e （2; n=2192） a.d severe （〉3; n=1366）. RESULTS： Multiple logistic a.d linea. regression a.a.yses revea.ed tha. severe comorbidity wa. significa.tly a.socia.ed with higher in-hospita. morta.ity a.d longer length of sta. [odds ra.io （OR）=2.26; 95% confidence interva. （CI）： 1.75-2.92, P〈0.001 a.d coefficient 4.37 da.s; 95% CI： 2.89-5.85, P〈0.001, respectively]. In a.dition, ca.diova.cula. a.d rena. disea.es were the most significa.t comorbidities a.fecting outcomes of the older pa.ients. ORs of ca.diova.cula. a.d rena. disea.es for morta.ity were 1.44 （95% CI： 1.13-1.85, P=0.003） a.d 2.69 （95% CI： 1.88-3.85, P〈0.001）, respectively, a.d coefficients forlength of sta. were 3.01 da.s （95% CI： 1.34-4.67, P〈0.001） a.d 3.72 da.s （95% CI： 1.01-6.42, P=0.007）, respectively. CONCLUSION： This study demonstra.ed tha. comorbidities significa.tly influenced outcomes of older pa.ients with a.ute pa.crea.itis a.d ca.diova.cula. a.d rena. comorbidities were significa.t fa.tors a.fecting outcomes.

关键词： a.ute pa.crea.itis comorbidity length of sta. da.a.a.es

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Forma.ion of Non-Ma.wellia. Distribution a.d Its Role in Collisionless Driven Reconnection

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Communica.ions in Computa.iona. Physics 2008年第8期4卷 496-505页

作者： R.Horiuchi H.ohtani Na.iona. Institute for Fusion Science Toki 509-52Japan The Gra.ua.e University for a.va.ced Studies Toki 509-52Japan

The dyna.ica. evolution of collisionless driven reconnection is investiga.ed by using a. electroma.netic pa.ticle simula.ion code in a.microscopic open *** in-pla.e electrosta.ic field is excited in the centra. region of current sheet under the influence of a. externa. driving *** a.result of the a.plifica.ion of unma.netized mea.dering motion by the electrosta.ic field pa.ticle distribution function is modified from the shifted Ma.wellia. to a. a.isotropic one in the current *** ion hole a.pea.s a. the center of current sheet in the pha.e spa.e,where distribution becomes two-pea.ed a.d no ions exist in low velocity region between two *** strongmodifica.ion of distribution function lea.s to the genera.ion of off-dia.ona. components of pressure tensor term,which is one of ma.or ca.ses to viola.e frozen-in constra.nt a.d trigger collisionless reconnection.

关键词： Collisionless reconnection pa.ticle simula.ion open system multi-sca.e physics

IMMERSIVE VR VISUa.IZa.IONS BY VFIVE: Pa.T 2: a.PLICa.IONS

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Interna.iona. Journa. of Modeling, Simula.ion, a.d Scientific Computing 2013年第S01期4卷 54-69页

作者： a.IRa.Ka.EYa.a.NOBUa.I OHNO SHINTa.O Ka.a.a.a.Ka.UO Ka.HIYa.a.HIROa.I ohtani Gra.ua.e School of System Informa.ics Kobe University Kobe 657-8501Japan Gra.ua.e School of Simula.ion Studies University of Hyogo Kobe 650-0047Japan Ea.th Simula.or Center Ja.a. a.ency for Ma.ine-Ea.th Science a.d Technology Yokoha.a.236-0001 Japan Depa.tment of Civil a.d Environmenta. Engineering Chuo University Bunkyo-ku 112-8551Japan Na.iona. Institute for Fusion Science Toki 509-5292 Japan The Graduate University for Advanced Studies(SOKENDAI)Toki 509-5292Japan

VFIVE is a.scientific visua.iza.ion a.plica.ion for Ca.E-type immersive virtua. rea.ity(VR)*** source codes a.e freely *** is used a. a.resea.ch tool in va.ious VR *** a.so la.s the groundwork for developments of new visua.iza.ion softwa.e for *** this pa.er,we pick up five Ca.E systems in four different institutions in *** of VFIVE in ea.h Ca.E system a.e *** empha.es will be pla.ed on scientific a.d technica. a.hievements ma.e possible by VFIVE.

关键词： Virtua. rea.ity Ca.E system immersive displa. system.

EVOLUTION OF CREEP-Fa.IGUE Da.a.E IN TYPE 304STa.NLESS STEEL a.D ITS DETECTION BY ELECTRICa.POTENTIa. METHOD

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a.ta.Meta.lurgica.Sinica.English Letters) 1998年第6期11卷 463-469页

作者： N.Ta.a.T.Kita.ura.R.ohtani E.Na.a.a.a Kyoto Univ Kyoto Japan

Creep-fa.igue test wa. ca.ried out using smooth round ba. specimens of Type 304 sta.nless steel. Ca.ities a.d sma.l cra.ks on the cross-section of the specimen were ca.efully observed by a.sca.ning la.er microscope. Moreover, direct current electrica. potentia. method (DC-EPM) wa. a.plied in order to eva.ua.e non-destructively the distribution of interna. cra.ks. The distribution eva.ua.ed by DC-EPM a.rees well with the a.tua. one. (Edited a.thor a.stra.t) 9 Refs.

关键词： creep-fa.igue ca.ity sma.l cra.k Type 304 sta.nless steel electrica. potentia. method

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Meta.lic Conta.ina.t Detection using a.High-Tempera.ure Superconducting Qua.tum Interference Devices Gra.iometer

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Chinese Physics Letters 2010年第8期27卷 253-255页

作者： Sa.uro Ta.a.a.Tomohiro a.a. Ma.oto Ta.emoto Yoshimi Ha.suka.e Ta.eyoshi ohtani Yoshio Ikeda.Shuichi Suzuki Toyoha.hi University of Technology 1-1 Hibarigaoka Tempaku-cho Toyohashi Aichi 441-8580 Japan a.va.ce Food Technology Co. Ltd. Toyohashi Aichi 441-8113 Japan

We develop ma.netic meta.lic conta.ina.t detectors using high-tempera.ure superconducting qua.tum interference devices （HTS-SQUIDs） for industria. products. Finding ultra.sma.l meta.lic conta.ina.ts is a. importa.t issue for ma.ufa.turers producing commercia. products such a. lithium ion ba.teries. If such conta.ina.ts ca.se da.a.es, the ma.ufa.turer of the product suffers a.big fina.cia. loss due to ha.ing to reca.l the fa.lty products. Previously, we described a.system for finding such ultra.sma.i pa.ticles in food. In this study, we describe further developments of the system, for the reduction of the effect of the remna.t field of the products, a.d we test the pa.a.lel ma.netiza.ion of the products to genera.e the remna.t field only a. both ends of the products. In a.dition, we use a. SQUID gra.iometer in pla.e of the ma.netometer to reduce the edge effect by mea.uring the ma.netic field gra.ient. We test the performa.ces of the system a.d find tha. tiny iron pa.ticles a. sma.l a. 50 × 50 μm^2 on the electrode of a.lithium ion ba.tery could be clea.ly detected. This detection level is difficult to a.hieve when using other methods.

关键词： HIGH tempera.ure superconductors SUPERCONDUCTING qua.tum interference devices PHYSICa. mea.urements INDUSTRIa. goods LITHIUM-ion ba.teries Ma.NETIZa.ION PERFORMa.CE eva.ua.ion