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sTUDY ON TRANsONIC CAsCADE PERFORMANCE BY UsE OF NEWLY BUILT FACILITY

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Chinese Journal of Aeronautics 1991年第2期6卷 104-112页

作者： s.kaji H.Takata M.Hiramoto Y.Machida H.Fujita H.Ito Department of Aeronautics University of Tokyo Bunkyo-ku Tokyo JAPAN Department of Aeronautics University of Tokyo Bunkyo-ku Tokyo JAPANDepartment of Aeronautics University of Tokyo Bunkyo-ku Tokyo JAPANDepartment of Aeronautics University of Tokyo Bunkyo-ku Tokyo JAPANDepartment of Aeronautics University of Tokyo Bunkyo-ku Tokyo JAPANDepartment of Aeronautics University of Tokyo Bunkyo-ku Tokyo JAPAN

Progress in computational fluid dynamics in the field of turbomachine cascades has increased recently the importance of the study by cascade wind tunnels to verify various newly introduced concepts. A transonic cascade wind tunnel test facility has been built for this purpose in the Department of Aeronautics, University of Tokyo. The system and operation of this facility will be explained in detail. The tunnel is of blowdown type, and can be run repeatedly at a short interval. Experimental cascade performances obtained by this facility as well as numerical results for cascades designed along new concepts are discussed.

关键词： sTUDY ON TRANsONIC CAsCADE PERFORMANCE BY UsE OF NEWLY BUILT FACILITY Figure

多层螺旋CT显示局灶性内膜破裂的大小与B型主动脉壁内血肿的疾病进展

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国际医学放射学杂志 2022年第1期 104-105页

作者： K.Ishizu s.kaji M.Nakashima T.Kitai K.Kim N.Ehara 白雪

摘要最近的影像学技术显示，主动脉壁内血肿（IMH）病人有不同大小的局灶性内破裂（FID）并可能会影响临床结果。目的评估多层螺旋CT检测到的FID大小与B型IMH

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suspension splittings and self-maps of Flag Manifolds

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Acta Mathematica sinica,English series 2019年第4期35卷 445-462页

作者： shizuo kaji stephen THERIAULT Institute of Mathematics for Industry Kyushu University Mathematical sciences University of Southampton

If G is a compact connected Lie group and T is a maximal torus, we give a wedge decomposition of ΣG/T by identifying families of idempotents in cohomology. This is used to give new information on the self-maps of G/T.

关键词： Flag manifold self-map stable splitting

Effects of different land-use systems (grazing and understory cultivation) on growth and yield of semi-arid oak coppices

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Journal of Forestry Research 2020年第6期31卷 2235-2244页

作者： Ali soltani Hamdollah sadeghi kaji saleh Kahyani Department of Forest science Faculty of Natural Resources and Earth SciencesShahrekord UniversityP.O.Box 115ShahrekordIran

The present study examines the extent of negative eff ects of traditional multiple land-use systems on oak coppices,from a forest management point of *** study area was located in approximately 10,000 ha of hilly Brant’s oak(Quercus brantii Lindl.)woodlands in the central Zagros *** the same site-quality class,three land-use systems were compared:simple coppice(Co),coppice in conjunction with small ruminant grazing(CoG),and coppice with understory rain-fed wheat cultivation plus grazing(CoCG).Data on total wood volume of trunk and major branches,and annual ring growth,were collected and analyzed from 74 stands in 15 coppiced woodland *** results showed the advantage of Co over CoG and CoCG land-uses by 43 and 60 m 3 of mean accumulated wood volume per hectare,*** diameter growth analysis also revealed an annual increase in wood production of trees in Co land-uses over 43 years,with an exception of the recent decade,when growth coincided with a severe *** a back-extrapolation method,the minimum rotation age of woodlands in Co land-use was found to be 23.6 years,5 and 7 years shorter than those of CoG and CoCG land-uses,*** CoCG,woodlands located in Co and CoG land-use systems demonstrated a high level of agreement with self-thinning rule of−3/*** for the stand density index for coppiced oak woodlands were between more than 1000 for the least disturbed(Co)and less than 400 for the most disturbed woodlands(CoCG).The structure and growth rate of the coppiced oak woodlands were irreversibly disrupted by understory tillage plus grazing and in less extent by grazing *** was concluded that ending undergrowth cultivation in semi-arid oak coppices should be addressed as a priority by adopting minimum regulations.

关键词： Coppicing Land-use impact assessment Diameter growth Multi-purpose land-use self-thinning rule stand density index

Unsteady Internal Flow Conditions of Mini-Centrifugal Pump with splitter Blades

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Journal of Thermal science 2013年第1期22卷 86-91页

作者： T. shigemitsu J. Fukutomi K. kaji T. Wada Institute of Technology and science The University of Tokushima Graduate school of Advanced Technology and science The University of Tokushima

Mini centrifugal pumps having a diameter smaller than lOOmm are employed in many fields. But the design method for the mini centrifugal pump is not established because the internal flow condition for these small-sized fluid machines is not clarified and conventional theory is not suitable for small-sized pumps. Therefore, mini cen- trifugal pumps with simple structure were investigated by this research. splitter blades were adopted in this re- search to improve the performance and the internal flow condition of mini centrifugal pump which had large blade outlet angle. The original impeller without the splitter blades and the impeller with the splitter blades were prepared for experiment. The performance tests are conducted with these rotors in order to investigate the effect of the splitter blades on performance and internal flow condition of mini centrifugal pump. On the other hand, a three dimensional unsteady numerical flow analysis was conducted to investigate the change of the internal flow according to the rotor rotation. It is clarified from the experimental results that the performance of the mini cen- trifugal pump is improved by the splitter blades. The blade-to-blade low velocity region was suppressed in the case with the splitter blades. In addition to that, the unsteady flows near the volute casing tongue were suppressed due to the splitter blades. In the present paper, the performance of the mini centrifugal pump is shown and the un- steady flow condition is clarified with the results of the numerical flow analysis. Furthermore, the effects of the splitter blades on the performance and the unsteady internal flow condition are investigated.

关键词： Mini-centrifugal pump Unsteady flow condition Performance splitter blades

The Effect of Blade Outlet Angle on Performance and Internal Flow Condition of Mini Turbo-Pump

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Journal of Thermal science 2011年第1期20卷 32-38页

作者： T.shigemitsu J.Fukutomi R.Nasada K.kaji Institute of Technology and science The University of Tokushima2-1 Minamijyosanjima-choTokushima 770-8506JAPAN Graduate school of Advanced Technology and science The University of Tokushima2-1 Minamijyosanjima-choTokushima 770-8506JAPAN

Mini turbo-pumps having a diameter smaller than 100mm are employed in many fields;automobile radiator pump,ventricular assist pump,cooling pump for electric devices,washing machine pump and so ***,the needs for mini turbo-pumps would become larger with the increase of the application of it for electrical *** is desirable that the mini turbo-pump design is as simple as possible due to restriction to make precise *** the design method for the mini turbo-pump is not established because the internal flow condition for these small-sized fluid machineries is not clarified and conventional theory is not conductive for small-sized *** types of rotors with different outlet angles are prepared for an experiment and a numerical *** performance tests are conducted with these rotors in order to investigate the effect of the blade outlet angle on performance and internal flow condition of mini *** is clarified from the experimental results that head of the mini turbo-pump increases and maximum efficiency flow rate shifts to larger flow rate according to the increase of the blade outlet angle,however the maximum efficiency decreases with the increase of *** the present paper,the performance of the mini turbo-pump is shown and the internal flow conditions are clarified with the results of the experiment and the numerical flow ***,the effects of the blade outlet angle on the performance are investigated and high performance design with simple structure for the mini turbo-pump would be considered.

关键词： Mini Turbo-Pump Centrifugal pump Performance Internal flow Blade outlet angle

Insights into the pathogenesis of multiple system atrophy: focus on glial cytoplasmic inclusions

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Translational Neurodegeneration 2020年第1期9卷 66-80页

作者： seiji kaji Takakuni Maki Tomoyuki Ishimoto Hodaka Yamakado Ryosuke Takahashi Department of Neurology Graduate School of MedicineKyoto University54 Shogoin-Kawahara-choSakyo-kuKyotoJapan

Multiple system atrophy(MsA)is a debilitating and fatal neurodegenerative *** disease severity warrants urgent development of disease-modifying therapy,but the disease pathogenesis is still *** in MsA brains is preceded by the emergence of glial cytoplasmic inclusions(GCIs),which are insoluble α-synuclein accumulations within oligodendrocytes(OLGs).Thus,preventive strategies against GCI formation may suppress disease ***,although numerous studies have tried to elucidate the molecular pathogenesis of GCI formation,difficulty remains in understanding the pathological interaction between the two pivotal aspects of GCIs;asynuclein and *** difficulty originates from several enigmas:1)what triggers the initial generation and possible propagation of pathogenic α-synuclein species?2)what contributes to OLG-specific accumulation of α-synuclein,which is abundantly expressed in neurons but not in OLGs?and 3)how are OLGs and other glial cells affected and contribute to neurodegeneration?The primary pathogenesis of GCIs may involve myelin dysfunaion and dyshomeostasis of the oligodendroglial cellular environment such as autophagy and iron *** have previously reported that oligodendrocyte precursor cells are more prone to develop intracellular inclusions in the presence of extracellular fibrillary α-*** finding implies a possibility that the propagation of GCI pathology in MsA brains is mediated through the internalization of pathological α-synuclein into oligodendrocyte precursor *** this review,in order to discuss the pathogenesis of GCIs,we will focus on the composition of neuronal and oligodendroglial inclusions in ***,we will introduce some hypotheses on how α-synuclein pathology spreads among OLGs in MsA brains,in the light of our data from the experiments with primary oligodendrocyte lineage cell *** various reports have focused on the mysterious source of α-

关键词： Multiple system atrophy a-synuclein Glial cytoplasmic inclusion Prion Neurodegeneration Oligodendrocyte Microglia Astrocyte Oligodendrocyte precursor cell

Dynamic Transition of Exchange Rate Regime in China

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China & World Economy 2014年第3期22卷 36-55页

作者： Naoyuki Yoshino sahoko kaji Tamon Asonuma Asian Development Bank Institute Department of Economics Keio UniversityJapan International Monetary Fund WashingtonDCUSA

Thepaper considers the optimal transition path for China＇s exchange rate regime. How can China successfully make the shift from the current dollar peg regime to a more desirable regime, whether a basket peg or a floating regime？ To answer this question, we develop a dynamic small open economy general equilibrium model. We construct four transition policies based on a basket peg or a floating regime and compare the welfare gains of these policies relative to maintaining the dollar peg regime. Two main results are derived from the quantitative analysis using Chinese data from 1999Q1 to 2010Q4. First, following a gradual adjustment to a basket peg regime is the most appropriate path for China to take, with minimal welfare losses associated with the shift in the exchange rate regime. second, a sudden shift to the basket peg is the second best solution, and is superior to a sudden shift to floating because the monetary authority can efficiently determine optimal weights to attach to currencies in the basket to achieve policy goals once they adopt a basket peg regime.

关键词： Chinese renminbi Chinese exchange rate regime dynamic adjustment transition path

Effects of silviculture treatments in a hurricane-damaged forest on carbon storage and emissions in central Hokkaido, Japan

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Journal of Forestry Research 2011年第1期22卷 13-20页

作者： Toshiaki Owari Naoto Kamata Takeshi Tange Mikio kaji Akio shimomura Hokkaido Forest Graduate School of Agricultural and Life Sciences The University of Tokyo 2 jo Kita 1 Yamabe Furano Hokkaido 079-1561 Japan Chichibu Forest Graduate School of Agricultural and Life Sciences The University of Tokyo 1-1-49 Hinoda Chichibu Saitama 368-0034 Japan Department of Forest science Graduate School of Agricultural and Life Sciences The University of Tokyo 1-1-1 Yayoi Bunkyo Tokyo 113-8657 Japan

Hurricanes cause abrupt carbon reduction in forests, but silviculture treatment can be an effective means of quickly regenerating and restoring hurricane-damaged sites. This study assessed how silviculture treatments affect carbon balance after hurricane damage in central Hokkaido, Japan. We examined carbon storage in trees and underground vegetation as well as carbon emissions from silviculture operations in 25-year-old stands, where scarification and plantation occurred just after hurricane damage. The amount of carbon stored varied according to silviculture treatment. Among three scarification treatments, a scarified depth of 0 cm （understory vegetation removal） led to the largest amount of carbon stored （64.7 t·ha^-1 C）. Among four plantation treatments, the largest amount of carbon was stored in a Larix hybrid （L. gmelinii var. japonica × L. kaempferi） plantation （80.3 t·ha^-1 C）. The plantation of Abies sachalinensis was not successful at accumulating carbon （40.5·ha^-1 C）. The amount of carbon emitted from silviculture operations was 0.05-0.14 t·ha^-1 C, and it marginally affected the net carbon balance of the silviculture project. Results indicate that silviculture treatments should beperformed in an appropriate way to effectively recover the ability of carbon sequestration in hurricane-damaged forests.

关键词： carbon emission carbon storage forest restoration hurricane damage plantation scarification