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一个用于多重示踪技术的康普顿成像装置

同位素 2001年第3期14卷 155-160页

作者：杨永峰 y.Gono S.Motomura S.Enomoto y.yano 中国科学院近代物理研究所甘肃兰州730000 日本九州大学物理系日本理化学研究所回旋加速器中心

提出了一个由位置灵敏高纯锗探测器组成、用于多重示踪技术的康普顿成像装置。简要介绍了康普顿成像系统的工作原理以及影响其空间分辨率的各种因素。用蒙特卡洛方法模拟了所提出的康普顿成像装置对处于不同位置、发射不同能量γ射线的... 详细信息

提出了一个由位置灵敏高纯锗探测器组成、用于多重示踪技术的康普顿成像装置。简要介绍了康普顿成像系统的工作原理以及影响其空间分辨率的各种因素。用蒙特卡洛方法模拟了所提出的康普顿成像装置对处于不同位置、发射不同能量γ射线的点源可达到的效率和空间分辨率。用现有的 2个多单元高纯锗探测器进行了三个点源成像实验。

关键词：多重示踪技术康普顿成像装置蒙特卡洛模拟锗探测器成像方法

Arsenic speciation for the phy.oremediation by.the Chinese brake fern,Pteris vittata

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Journal of Environmental Sciences 2008年第12期20卷 1463-1468页

作者： R.Shoji R.y.jima y.yano Department of Chemical Science and Engineering Tokyo National College of Technology1220-2 KunugidaHachioji

Arsenic(As)speciation for the phy.oremediation by.the Chinese brake fern was *** particular,the mechanism of how plants induce compounds containing thiol(SH)and proteins by.As exposure in terms of the relationship between As and phosphate uptaken into plant cells was *** vittata callus could effciently.reduce As(V)to As(III)by.the rapid introduction of reductase and sy.thesize thiols leading to phy.ochelatins ***,Pteris vittata could control phosphate concentration in t...

关键词： arsenic hy.er accumulator phosphorus thiol phy.ochelatin

Processing and Performance of Alumina Fiber Reinforced Alumina Composites

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Journal of Materials Science & Technology 2003年第4期19卷 337-340页

作者： P.y.Leet T.Uchijima T.yano Research Laboratory.for Nuclear Reactors Tokyo Institute of Technology2-12-1O-okayamaMeguro-kuTokyo152-8550JapanResearch Laboratory for Nuclear ReactorsTokyo Institute of Technology2-12-1O-okayamaMeguro-kuTokyo152-8550JapanResearch Laboratory for Nuclear ReactorsTokyo Institute of Technology2-12-1O-okayamaMeguro-kuTokyo152-8550Japan

Processing of alumina fiber-reinforced alumina matrix composites by.hot-pressing was described. The mechanical properties of the composites fabricated by.different sintering conditions including temperature and pressure have been investigated. The results indicated that the higher sintering temperature and pressure corresponded to the higher bulk density.and higher maximum strength of the composite, whereas the pseudo-ductility.of the composite was lower. The preliminary.results of the composite with monazite-coated fibers showed that maximum strength could be improved up to 35% compared with the noncoated fiber composite in the same sintering condition. Moreover, the fracture behavior of the composite changed from completely.brittle fracture to non-brittle fracture under the suitable sintering conditions. SEM observation of the fracture surface indicated that the coating worked as a protective barrier and avoided sintering of the fibers together even at high temperature and pressure during densification process.

关键词： Al2O3/Al2O3 composites Mechanical properties Hot-pressing Fiber reinforced composites

Crowd evacuation of pairs of pedestrians

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Communications in Theoretical Phy.ics 2022年第4期74卷 97-112页

作者： Ry.suke yano Tokio Marine d R Co.ltd. 1-5-1OtemachiChiyoda-kuTokyo100-0004Japan

The crowd evacuation of pairs of pedestrians(*** consisting of a parent and a child)is numerically.***,it is assumed that all pedestrians have their own partners,and move randomly.inside the bounded domain of the right-hand room as an initial *** pedestrians start their evacuations after they.contact their *** evacuations are completed by.the transfer of all the pairs from the right-hand room to the left-hand room through an exit.A frozen swarm tends to appear in the right-hand room as the total number of pedestrians *** frozen swarm moves without changing its form,unless it is dissolved by.a strong collision with a pair of pedestrians that comes back from the left-hand room by.***,the evacuation speed also depends on the area of the Escape Zone,whereas an obstacle placed in front of an exit also changes the speed of the evacuation in accordance with the ty.e of motion of the children.

关键词： Evacuation of paired pedestrians force chain network escape from crowd

Image reconstruction from Compton scattering data

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Nuclear Science and Techniques 2004年第6期15卷 365-367页

作者： PANQiang-y.n y.GONO S.MOTOMURA S.ENOMOTO y.yano ShanghaiInstituteofAppliedPhy.ics theChineseAcademyofSciencesShanghai201800China Departmentofphy.ics kyushuuniversityfukuoka812-8581japan Cy.lotroncenter RIKENsuitama351-0198japan

A new image reconstruction method was developed for a Compton camera. A simulation to determine a γ-ray.source position was performed by.using the simulation tool, GEANT4. An image reconstruction was made in two steps. First, a three dimensional image was constructed and projected in one selected plane, then the points from each ellipse was picked up by.taking the peak points of a density.distribution of crossing points between the ellipse and the first step image. The second step procedure improved the accuracy.and the spatial resolution of a position de- termination significantly. comparing with the image obtained by.only.the first step. The accuracy.and the resolution for a point source were obtained to be about 0.02 mm and (1.35±0.15) mm, respectively. The same procedure was applied to an imaging of the distributed γ-ray.source.

关键词：康普敦散射锗位置探测仪图象重构重离子束 γ-射线

Ongoing Applicative Studies of Plant Thioredoxins

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Molecular Plant 2014年第1期7卷 4-13页

作者： Hiroy.ki yano National Food Research Institute National Agriculture and Food Research Organization Kannondai 2-1-12 Tsukuba Ibaraki 305-8642 Japan

Studies triggered by.the discovery.of the function of thioredoxin （Trx） in photosy.thesis have revealed its role throughout biology. Parallel biochemical and proteomic analy.es have led to the identification of its numerous puta- tive targets. Recently. to verify.the biological significance of these targets, in vivo studies using transformants in which Trx is overexpressed or suppressed are in progress, and the transformants themselves that are being used in such studies show their potential applicative values. Moreover, Trx＇s mitigation of allergenicity.for some proteins offers promising prospects in the food industry. Practical studies based on redox regulation, once only.on the horizon, are now achieving new dimensions. This short review focuses on the industrial applications of Trx studies, the current situation, and future perspectives. The putative targets obtained by.the proteomics approach in comparison with in vivo observations of the transformants are also examined. Applicative studies of glutathione, a counterpart of Trx, are also discussed briefly.

关键词： allergen food redox regulation target thioredoxin.

INTELLIGENT METATAL COMPLEXES CONTAINING N-GLy.OSIDES FORMED FROM TRIS (2-AMINOETHy.) AMINE AND ALDOSES, HAVING MOLECULAR RECOGNITION ABILITy

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Chinese Journal of Poly.er Science 1998年第3期16卷 193-206页

作者： yano Shigenobu Department of Chemistry Nara Women's University Kitauoyanishimachi Nara 630-8263 Japan

Assembly.of carbohy.rates on nickel (Ⅱ) center by.utilizing N-gly.osidicbond formation with a branched amine: tris(2-aminoethy.)amine (tren), an unprecedentedchiral inversion around the metal center (Co or Mn) induced by.an interaction betweensugars and sulfate anions, peroxo-bridged dinuclear cobalt (Ⅲ) complex containing N-gly.oside ligands from tren and D-glucose and its reversible dioxy.en binding property.and novel trimanganese complexes with a linear Mn_3 (Ⅱ, Ⅲ, Ⅱ) assemblage bridged by.arbohy.rates are described.

关键词： Intelligent sugar complex Molecular recognition N-gly.oside complex

A new algorithm based on metaheuristics for data clustering

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Journal of Zhejiang University.Science A(Applied Phy.ics & Engineering) 2010年第12期11卷 921-926页

作者： Tsutomu SHOHDOHJI Fumihiko yano y.shiaki TOy.DA Department of Computer and Information Engineering Faculty of EngineeringNippon Institute of Technology Division of Integrated Sciences J.F.Oberlin University Aoy.ma Gakuin University

This paper presents a new algorithm for clustering a large amount of *** improved the ant colony.clustering algorithm that uses an ant’s swarm intelligence,and tried to overcome the weakness of the classical cluster analy.is *** our proposed algorithm,improvements in the efficiency.of an agent operation were achieved,and a new function "cluster condensation" was *** proposed algorithm is a processing method by.which a cluster size is reduced by.uniting similar objects and incorporating them into the cluster *** with classical cluster analy.is methods,the number of steps required to complete the clustering can be suppressed to 1% or less by.performing this procedure,and the dispersion of the result can also be ***,our clustering algorithm has the advantage of being possible even in a small-field cluster *** addition,the number of objects that exist in the field decreases because the cluster condenses;therefore,it becomes possible to add an object to a space that has become *** other words,first,the majority.of data is put on *** are then clustered,gradually.adding parts of the standby.data to the clustering *** method can be adopted for a large amount of *** experiments confirmed that our proposed algorithm can theoretically.applied to an unrestricted volume of data.

关键词： Metaheuristics Ant colony.clustering Data clustering Swarm intelligence

Short-and long-term outcome of interferon therapy.for chronic hepatitis B infection

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World Journal of Gastroenterology 2014年第37期20卷 13284-13292页

作者： y.sushi Seo y.shihiko yano Division of Gastroenterology Department of Internal MedicineKobe University Graduate School of Medicine Internal Medicine and Ophthalmology.Clinic

Hepatitis B virus (HBV) infection is a serious clinical problem worldwide. Conventional interferon (IFN)-α has been approved for the treatment of chronic hepatitis B (CHB). Short-term studies have demonstrated that IFN-based therapy.is moderately.effective in inducing the loss of hepatitis e antigen (HBeAg) or seroconversion (30%-40%) in HBeAg-positive patients and also produces sustained HBV DNA suppression (20%-30%) in HBeAg-negative patients. Many.studies have reported a correlation between the HBV genoty.e and response to IFN treatment. The highest response rate to IFN treatment was found in patients infected with HBV genoty.e A, followed by.HBV genoty.es B, C, and D. The long-term effect of IFN-α on CHB has not y.t been elucidated. The ability.of IFN-α treatment to prevent new cirrhosis, complications associated with cirrhosis, and development of hepatocellular carcinoma (HCC) is controversial. The beneficial effect of IFN-α treatment in reducing the development of HCC has mainly.been observed in treatment responders who already.have cirrhosis. These inconsistent findings may.be attributed to the inevitable limitations of comparisons across studies, including differences in the baseline characteristics of the study.and the moderate suppression of HBV replication by.IFN-α relative to nucleoside/nucleos(t)ide analogs.

关键词： Chronic hepatitis B Hepatitis B virus Interferon α Long-term outcome Hepatocellular carcinoma