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A short history of nuclear magnetic moments and GT transitions

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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 188-193页

作者： ARIMA akito Musashi University

We summarize the history and our present understanding of nuclear magnetic moments and Gamow-Teller *** roles of configuration mixing,meson exchange currents and relativistic effects are *** evidence for the importanc... 详细信息

关键词： nuclear magnetic moments Gamow-Teller transitions

High-temperature formation phases and crystal structure of hot-pressed thermoelectric compounds with chalcopyrite-type structure

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Rare Metals 2018年第4期37卷 360-368页

作者： Atsuko Kosuga Yosuke Fujii akito Horie Department of Physical Science Graduate School of ScienceOsaka Prefecture University JST PRESTO Department of Electronics Mathematics and PhysicsGraduate School of EngineeringOsaka Prefecture University

In this study, we introduced the temperaturedependent formation phases and crystallographic parameters of hot-pressed silver gallium telluride AgGaTe2 and copper gallium telluride CuGaTe2 with chalcopyrite structure from 300 to 800 K. These two compounds are potential thermoelectric materials in the intermediate temperature range; however, the temperature-dependent formation phases and crystallographic parameters of hotpressed samples have not yet been analyzed in detail. The crystal structure analysis based on synchrotron X-ray diffraction （SXRD） measurements clarifies that impurity phases such as Te and Ag2Te in the AgGaTe2 matrix and Te and CuTe in the CuGaTe2 matrix appear at some temperature regions above 300 K. The existence of such impurity phases could be correlated with the increases of the electrical resistivity and Seebeck coefficient of the samples after multiple measurement cycles of the temperature-dependent transport properties from 300 to 800 K. The tetragonal lattice parameters a and c, tetragonal lattice volume, thermal expansion coefficients, tetragonal distortion, anion displacement parameter, and isotropic displacement parameter of the hot-pressed AgGaTe2 and CuGaTe2 were also analyzed. These crystallographic parameters are expected to substantially affect the thermoelectric properties of AgGaTe2 and CuGaTe2. Our results provide prospect of the long-term high-temperature stability and clues of the detailed analysis on the transport properties of hot-pressed AgGaTe2 and CuGaTe2, which should aid their development for thermoelectric applications.

关键词： Chalcopyrite Silver gallium telluride Coppergallium telluride Thermoelectric Crystal structure

Landslide Hazard Mapping During a Large Scale Earthquake

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Journal of Mountain Science 2011年第2期8卷 223-227页

作者： akito NAKASUJI Kokusai Kogyo Co. LTD.

This paper reports a method to make hazard maps of sediment disasters resulting from an earthquake and following heavy rainfall for the entire region of Gunma prefecture, Japan. Firstly, we identified the slopes in the study area, which are susceptible to large-scale landslides and land failures during an earthquake with a magnitude of seven on the Richter scale. To analyze the sheer volume of the data, we employed a statistical method to evaluate the susceptibility, mainly considering geomorphologic conditions. Secondly, we extracted mudflow and slope failure susceptible areas and potential flooding zones resulting from a damming at a river triggered by the earthquake and heavy rainfall, and we identified the settlements which would be isolated by the road disruption caused by the sediment disasters. As the result, 359 settlements were classified as potential isolation areas. Combining the above-mentioned susceptibility maps, we obtained two types of sediment disaster hazard maps of the study area, depicting the potential hazards which would occur during the earthquake and the disasters which would be caused by heavy rainfall following the quake, respectively. These hazard maps and the disaster information would be useful for the regional disaster prevention planning and countermeasures in the future.

关键词： Earthquake hazard Landslide Hazard map

The orbital g-factor and related sum rules

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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 194-197页

作者： BENTZ Wolfgang ARIMA akito Department of Physics School of ScienceTokai University Musashi University

The renormalization of the orbital g-factor in nuclei is discussed on the basis of gauge *** relation of the orbital g-factor to the integrated E1 photoabsorption cross section is reviewed,and its relation to the M1 s... 详细信息

关键词： nuclear magnetic moments g-factors giant resonances sum rules

Frontier of continuous structural health monitoring system for short&medium span bridges and condition assessment

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Frontiers of Structural and Civil Engineering 2019年第3期13卷 569-604页

作者： Ayaho MIYAMOTO Risto KIVILUOMA akito YABE Department of Civil Engineering Aalto UniversityAaltoFinland Sustainable Solutions Dept. KOZO KEIKAKU Eng.Inc.TokyoJapan

It is becoming an important social problem to make maintenance and rehabilitation of existing short and medium span(10-20 m)bridges because there are a huge amount of short and medium span bridges in service in the *** kernel of such bridge management is to develop a method of safety(condition)assessment on items which include remaining life and load carrying *** health monitoring using information technology and sensors is capable of providing more accurate knowledge of bridge performance than traditional *** aim of this paper is to introduce a state-of-the-art on not only a rational bridge health monitoring system incorporating with the information and communication technologies for lifetime management of existing short and medium span bridges but also a continuous data collecting system designed for bridge health monitoring of mainly short and medium span *** this paper,although there are some useful monitoring methods for short and medium span bridges based on the qualitative or quantitative information,mainly two advanced structural health monitoring systems are described to review and analyse the potential of utilizing the long term health monitoring in safety assessment and management issues for short and medium span *** first is a special designed mobile in-situ loading device(vehicle)for short and medium span road bridges to assess the structural safety(performance)and derive optimal strategies for maintenance using reliability based *** second is a long term health monitoring method by using the public buses as part of a public transit system(called bus monitoring system)to be applied mainly to short and medium span bridges,along with safety indices,namely,"characteristic deflection"which is relatively free from the influence of dynamic disturbances due to such factors as the roughness of the road surface,and a structural anomaly parameter.

关键词： condition assessment short&medium span bridge structural health monitoring(SHM) long-term data collection system maintenance bridge performance information technology loading vehicle(public bus) in-situ loading

Optimal channels of the Garvey-Kelson mass relations in extrapolation

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Science China(Physics,Mechanics & Astronomy) 2017年第2期60卷 18-23页

作者： Man Bao Zeng He YiYuan Cheng YuMin Zhao akito Arima Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Northwest Institute of Nuclear Technology Xi'an 710024 China IFSA Collaborative Innovation Center Shanghai Jiao Tong University Shanghai 200240 China Musashi Gakuen 1-26-1 Toyotamakami Nerima-ku Tokyo 176-8533 Japan

Garvey-Kelson mass relations connect nuclear masses of neighboring nuclei within high accuracy, and provide us with convenient tools in predicting unknown masses by extrapolations from existent experimental data. In this paper we investigate optimal"channels" of the Garvey-Kelson relations in extrapolation to the unknown regions, and tabulate our predicted masses by using these optimized channels of the Garvey-Kelson relations.

关键词： Garvey-Kelson mass relations accuracy predicted masses

Relativistic description of second-order correction to nuclear magnetic moments with point-coupling residual interaction

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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 204-209页

作者： LI Jian MENG Jie RING Peter YAO JiangMing ARIMA akito State Key Laboratory for Nuclear Physics and Technology School of Physics Peking University Beijing 100871 China School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China Department of Physics University of Stellenbosch Stellenbosch South Africa Physik-Department der Technischen Universitat Munchen D-85748 Garching Germany School of Physical Science and Technology Southwest University Chongqing 400715 China Science Museum Japan Science Foundation 2-1 Kitanomaru-koen Chiyoda-ku Tokyo 102-0091 Japan

Using the single particle states and the residual interaction derived from the relativistic point-coupling model with the PC-F1 parameter set,the second-order core polarization corrections to nuclear magnetic moments of LS closed shell nuclei ±1 nucleon with A = 15,17,39 and 41 are studied and compared with previous non-relativistic *** is found that the second-order corrections are *** these corrections,the isovector magnetic moments of the concerned nuclei are well reproduced,especially those for A = 17 and A = 41.

关键词： second-order core polarization magnetic moments relativistic point-coupling model residual interaction

Grazing and heat stress protection of native grass by a sand-fixing shrub in the arid lands of northern China

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Journal of Arid Land 2022年第8期14卷 867-876页

作者： Keiichi KIMURA akito KONO Susumu YAMADA Tomoyo F KOYANAGI Toshiya OKURO Department of Ecosystem Studies Graduate School of Agricultural and Life SciencesThe University of TokyoTokyo 113-8657Japan Graduate School of Environmental Studies Nagoya UniversityAichi 464-8601Japan Faculty of Agriculture Tokyo University of AgricultureKanagawa 243-0034Japan Field Studies Institute for Environmental Education Tokyo Gakugei UniversityTokyo 184-0015Japan

Shrub species are used in restoration projects on dryland for their facilitation effects,which include environmental improvements and protection from herbivore *** effects on forage grasses are potentially important in improving grazing capacity on ***,the morphology-dependent performance of benefactor plants in facilitating forage species growth and supplementation under moderate grazing intensity remains ***,our main purpose was to measure facilitation performance in terms of the survival of a native forage grass,Agropyron cristatum(L.)Gaertn.(Gramineae).,in accordance with the growth conditions of a sand-fixing benefactor shrub,Caragana microphylla Lam.,in the Hulun Buir Grassland,northern *** study sites with patches of *** and *** were established at the foot of fixed sand *** each site,five quadrats were set in places where *** coverage was 100%and *** grew among the shrubs(shrub quadrats),and another five were set where *** grew alone without ***(grass quadrats).We measured the morphological traits of *** and *** in all 60 quadrats,along with the soil water content and soil *** data were compared between the shrub and grass quadrats by generalized linear mixed-effect models to assess the shrub's facilitation *** also used such models to elucidate the relationship between the average height of *** and the morphological traits of *** in the shrub *** maximum height,average grazed height,and the number of seed heads of *** were greater in the shrub quadrats than in the grass *** soil surface temperature was lower in the shrub *** maximum height and seed head number of *** were positively associated with the average height of *** results suggest that the grazing impact and heat stress were smaller in shrub quadrats than in grass quadrats,and that

关键词： Caragana microphylla dryland ecosystem restoration facilitation grazing impact heat stress

Hydrogen Adsorption by Woodceramics Produced from Biomass

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Journal of Shanghai Jiaotong university(Science) 2012年第3期17卷 330-333页

作者： TAKASAKI akito IIJIMA Suguru YAMANE Tomoka OKABE Toshio Department of Engineering Science and Mechanics Shibaura Institute of TechnologyTokyo 135-8548Japan Aomori Prefectural Industrial Technology Research Center Aomori 030-0142Japan

Hydrogen adsorption characteristics of woodceramics,made from radiata pine wood fiber boards carbonized at 1 473 K after impregnation with phenolic resin,with and without chemical treatment in an alkaline(KOH) or an acid(H 2 SO 4) solution were investigated The hydrogen adsorption capacity is improved by chemical *** chemical treatment by KOH improves the adsorption capacity more than by H 2 SO *** improvement of the capacity level,in any solution,is dependent on the type of chemical in the solution and its *** maximum hydrogen capacity measured at 93 K is mass fraction about w(H) = 2% for the woodceramics after chemical treatment in a volume fraction = 50% KOH solution,although that is about w(H) = 0.7% for one without chemical *** microscopic condition of pores in the woodceramics is thought to vary after chemical treatment.

关键词： woodceramics biomass hydrogen adsorption chemical treatment isotherm