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Fundamentals of Sustainable Water Management in Cities

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Fundamentals of Sustainable Water Management in Cities

HYDRODYNAMIC CHARACTERISTICS OF LAKE YANAKA

'2004北京城市水利建设与发展国际学术研讨会

作者： nobuyuki tamai Department of Civil Engineering Kanazawa University

＜正＞Sustainable water management in cities is reviewed in the areas of flood control, water resources, and water quality based on experiences in Tokyo metropolitan area. Unexpectedly high speed of urbanization and larger natural disturbances impose difficult situations on medium- or small-size urban rivers. In order to cope with difficulties basin-wide approach and consensus building among all stakeholders give us a chance to reach to a better solution. It is pointed out that basin-wide optimum may enhance sustainability of a river basin.

关键词： basin management sustainability flood water resources water quality

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Journal of Hydrodynamics 2001年第2期13卷 9-14页

作者： Huang Guang wei Department of Civil Engineering, Kanazawa University, 40 20 Kodatsuno 2Chome, Kanazawa lshikawa 920 8667, Japan nobuyuki tamai Department of Civil Engineering, The University of Tokyo, 7 3 1, llongo, Bunkyo ku, Tokyo, 113 8656 Dept. of Civil Eng. Kanazawa Univ. Kanazawa 9208867 Japan

As part of a major effort to undersand and quantify the cnvironmental conditions in Lake Yanaka, the circulation patterns in Lake Yanaka were analyzed through the application of a three dimensional hydrodynamic model. The model was validated with field observation, and then used to study the response of the lake to different forcing. The information on flow structures obtained in the present study is useful for further study of water quality in the lake.

关键词： Lake Yanaka three dimensional model flow structures

线性与非线性紊流模型及其在丁坝绕流中的应用

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水动力学研究与进展（A辑） 2003年第5期18卷 589-594页

作者：彭静河源能久玉井信行中国水利水电科学研究院水环境研究所北京100038 日本东京大学土木系

　本文采用线性与非线性三维紊流数值模型对丁坝绕流进行了仿真分析。采用的线形紊流模型为Zhu Shih修正的k ε模型,非线性紊流模型为Shih等提出的k ε模型。计算分析了单一丁坝和丁坝群两种不同布置方式下绕流流场的紊动特征,并与实验... 详细信息

　本文采用线性与非线性三维紊流数值模型对丁坝绕流进行了仿真分析。采用的线形紊流模型为Zhu Shih修正的k ε模型,非线性紊流模型为Shih等提出的k ε模型。计算分析了单一丁坝和丁坝群两种不同布置方式下绕流流场的紊动特征,并与实验结果进行了比较。结果表明,非线性模型对平均流场的描述要优于线性模型。文章对非线性模型能提高模拟精度的原因进行了分析。

关键词：线性紊流模型非线性紊流模型紊流丁坝绕流流场仿真 κ-ε模型

Charge generation in organic solar cells: Journey toward 20% power conversion efficiency

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Aggregate 2022年第6期3卷 5-33页

作者： Yasunari tamai Department of Polymer Chemistry Graduate School of EngineeringKyoto UniversityKatsuraNishikyoKyotoJapan Japan Science and Technology Agency(JST) PRESTO4-1-8 Honcho KawaguchiSaitamaJapan

The power conversion efficiencies of organic solar cells(OSCs)have routinely lagged far behind those of their inorganic ***,owing to the enor-mous contributions of many researchers,the power conversion efficiencies of OSCs have rapidly improved and now exceed 19%.The charge generation mechanisms in OSCs have been heavily debated during this period while acquiring valuable *** review highlights fundamental and cutting-edge research that rationalizes why OSCs can generate photocurrent so *** particular,a photophysi-cist’s views on exciton diffusion to donor:acceptor interfaces,charge transfer at the donor:acceptor interface,and long-range spatial dissociation of charge transfer states are *** a general consensus in this area has not been reached yet,recent time-resolved spectroscopic measurements provide important photophys-ical insights that can help achieving a better understanding of the charge generation mechanism in *** on these observations,future research directions for realizing further improvements in OSC performance are discussed.

关键词： charge dissociation charge recombination charge separation charge transfer exciton diffusion organic

Susumu tamai MD, PhD——Autobiography

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中华显微外科杂志 2020年第2期43卷 I0007-I0008页

作者： Susumu tamai 河南省平顶山市湛河骨伤科医院手显微外科河南平顶山467000

I follow a long line of ancestors in my family *** first physician in my family dates back to 1650 and this occupation continues for 370 years up to the present time.I was born March 13,1935,in Kashihara city,in Nara,Japan.I graduated with my medical degree from Nara Medical University in 1959,continuing the line of 21 generations of physicians in my family.

关键词： occupation continue Auto

Single and combined eff ects of fertilization,ectomycorrhizal inoculation,and drought on container-grown Japanese larch seedlings

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Journal of Forestry Research 2023年第4期34卷 1077-1094页

作者： Evgenios Agathokleous Mitsutoshi Kitao Masabumi Komatsu Yutaka tamai Hisanori Harayama Takayoshi Koike Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science and TechnologyNanjing 210044JiangsuPeople’s Republic of China Research Center for Global Changes and Ecosystem Carbon Sequestration and Mitigation School of Applied MeteorologyNanjing University of Information Science and TechnologyNanjing 210044JiangsuPeople’s Republic of China Hokkaido Research Center Forestry and Forest Products Research Institute(FFPRI)Forest Research and Management Organization7 HitsujigaokaSapporoHokkaido 062-8516Japan Department of Mushroom Science and Forest Microbiology Forestry and Forest Products Research Institute(FFPRI)Matsunosato 1Tsukuba 305-8687Japan Research Faculty of Agriculture Hokkaido UniversityKita 9 Nishi 9SapporoHokkaido 060-8589Japan Department of Plant Ecology Forestry and Forest Products Research Institute(FFPRI)Matsunosato 1Tsukuba 305-8687Japan

Climate change can intensify drought in many regions of the world and lead to more frequent drought events or altered cycles of soil water ***,it is important to enhance the tolerance to drought and thus health,vigor,and success of transplantation seedlings used in the forestry by modifying fertilization and promoting ***,we sowed seeds of Japanese larch(Larix kaempferi)in 0.2-L containers with 0.5 g(low fertilization;LF)or 2 g(high fertilization;HF)of slow-release fertilizer early in the growing *** month later,we irrigated seedlings with non-sterilized ectomycorrhizal inoculum(ECM)or sterilized solution(non-ECM),and after about 2 months,plants were either kept well watered(WW;500 mL water/plant/week)or subjected to drought(DR;50 mL water per plant/week)until the end of the growing *** largely stimulated plant growth and above-and belowground biomass production,eff ects that are of practical signifi cance,but caused a small decrease in stomatal conductance(Gs 390)and transpiration rate(E 390),which in practice is insignifi *** treatment resulted in moderate inhibition of seedling growth and biomass and largely canceled out the enhancement of biomass and foliar K content by *** caused a large decrease in CO 2 assimilation,and enhanced stomatal closure and induced *** also largely depleted foliar Mg and enriched foliar *** DR caused a large decrease in foliar P content in LF,it moderately increased P in ***,DR increased foliar K in HF but not in LF,and decreased foliar P in ECM plants but not in non-ECM ***,ECM plants exhibited a large enrichment in foliar P under WW and had a lower water potential under DR when grown in *** results indicate that the drought tolerance and health and vigor of Japanese larch seedlings can be modifi ed by soil fertility and soil *** study provides a basis for new multifactorial research programs aimed at producing seedlings of su

关键词： Drought Ectomycorrhizae Fertilizer eff ect Oxidative stress Stressor interactions

Syngeneic implantation of mouse hepatic progenitor cell-derived three-dimensional liver tissue with dense collagen fibrils

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World Journal of Gastroenterology 2022年第14期28卷 1444-1454页

作者： Miho tamai Eijiro Adachi Masaya Kawase Yoh-ichi Tagawa School of Life Science and Technology Tokyo Institute of TechnologyYokohama-shi 226-8501Japan Faculty of Dental Medicine Hokkaido UniversitySapporo 060-8586Japan Department of Molecular Morphology Kitasato UniversityYokohama-shi 319-3526Japan Long-Term Care Health Facility Yasuragi Ibaraki Zip or Postal CodeJapan Nagahama Institute of Bio-Science and Technology Shiga 526-0829Japan

BACKGROUND Liver transplantation is a therapy for irreversible liver failure;however,at present,donor organs are in short *** transplantation therapy for liver failure is still at the developmental stage and is critically limited by a shortage of human primary *** To investigate the possibility that hepatic progenitor cells(HPCs)prepared from the portal branch-ligated hepatic lobe may be used in regenerative medicine,we attempted to enable the implantation of extracellular matrices containing organoids consisting of HPC-derived hepatocytes and non-parenchymal *** In vitro liver organoid tissue has been generated by accumulating collagen fibrils,fibroblasts,and HPCs on a mesh of polylactic acid fabric using a bioreactor;this was subsequently implanted into syngeneic wild-type *** The in vitro liver organoid tissues generated transplantable tissues in the condensed collagen fibril matrix and were obtained from the mouse through partial *** Liver organoid tissue was produced from expanded HPCs using an originally designed bioreactor *** tissue was comparable to liver lobules,and with fibroblasts embedded in the network collagen fibrils of this artificial tissue,it is useful for reconstructing the hepatic interstitial structure.

关键词： Liver Three-dimensional tissue culture Hepatic progenitor cells Angiogenesis Biomimetic extracellular matrix

Fatigue properties of rolled AZ31B magnesium alloy plate

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Transactions of Nonferrous Metals Society of China 2010年第B7期20卷 523-526页

作者： S.MORITA N.OHNO F.tamai Y.KAWAKAMI Faculty of Science and Engineering Saga University Material and Environment Department Industrial Technology Center of Saga

Fatigue strength,crack initiation and propagation behavior of rolled AZ31B magnesium alloy plate were investigated. Axial tension-compression fatigue tests were carried out with cylindrical smooth *** types of specimens were machined with the loading axis parallel(L-specimen)and perpendicular(T-specimen)to rolling *** compressive 0.2%proof stress,tensile strength and tensile elongation were similar for both *** the other hand,monotonic tensile 0.2%proof stress of the L-specimen was slightly higher than that of the ***,monotonic compressive 0.2%proof stresses were lower than tensile ones for both *** fatigue strengths of 107cycles of the L-and T-specimens were 95 and 85 MPa,respectively. Compared with the monotonic compressive 0.2%proof stresses,the fatigue strengths were higher for both *** other words, the fatigue crack did not initiate and propagate even though deformation twins were formed in compressive stress under the cyclic tension-compression *** fatigue crack initiated at early stage of the fatigue life in low cycle regime regardless of specimen *** crack growth rate of the L-specimen was slightly lower than of the ***,the fatigue lives of the L-specimen were longer than those of the T-specimen in low cycle regime.

关键词： magnesium alloy compressive proof stress fatigue strength crack initiation crack propagation

Experimental Study on Time-Spread/Wavelength-Hop Optical Code Division Multiplexing with Dispersion-Compensating En/Decoder

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光学学报 2003年第S1期23卷 725-726页

作者： Hideaki tamai Hideyuki Iwamura Naoki Minato Saeko Oshiba Oki Electric Industry Co. Ltd. 550-5 Higashiasakawa-cho Hachioji-shi Tokyo 193-8550 Japan Optoelectronic Industry and Technology Development Association 1-20-10 Sekiguchi Bunkyo-ku Tokyo 112-0041Japan

10Gbit/s time-spread/wavelength-hop optical code generation and decoding are performed by dispersion-compensating fiber Bragg grating (FBG) en/decoder pair. Error-free 10km single mode fiber (SMF) transmission of 10Gb... 详细信息

关键词： fiber Bragg grating single mode fiber code generation