Search Results 1-20 of 177

  • Estimation of Leaf Area and Light-use Efficiency by Non-destructive Measurements for Growth Modeling and Recommended Leaf Area Index in Greenhouse Tomatoes

    Saito Takeshi , Mochizuki Yuya , Kawasaki Yasushi , Ohyama Akio , Higashide Tadahisa

    … <p>We aimed to monitor greenhouse tomato growth without destructive sampling and investigated an empirical growth model in which dry matter production was obtained as a product of light intercepted by plants and light-use efficiency. … Significant regression lines and curves, as well as coefficients of the model, were obtained for each cultivar. … The developed model has potential to improve yield and labor efficiency in tomato production.</p> …

    The Horticulture Journal, 2020

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  • Environmental Dynamics of Radionuclides and Its Long-term Predictions from Chemical Sight—How Can We Evaluate the Immobilization of Radiocesium in Soil?—  [in Japanese]

    Nakao Atsushi , Takahashi Yoshio

    <p>東京電力福島第一原子力発電所事故に由来する放射性セシウムの大部分は土壌に残留する。土壌に存在する層状鉱物の層間負電荷への吸着反応が土壌系外への移動を大幅に遅延させるためである。本稿では,放射性セシウムの環境挙動を規定する吸着サイトの定量方法とその原理について紹介するとともに,その吸着サイト量を説明変数とした土壌-植物間放射性Cs移行予測モデルの概要と日本の土壌への適用に向けた課題 …

    RADIOISOTOPES 69(2), 79-91, 2020

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  • Renoprotective mechanism analysis of agmatine on ischemic acute kidney injury with high coverage expression profiling  [in Japanese]

    Sugiura Takahiro , Sugiyama Miki , Imaizumi Takahito , Hirasawa Yasushi

    … The ischemic AKI model by the interception of the bloodstream is the superior model that can evaluate an efficacy evaluation and condition of a patient elucidation in a short term for AKI without the therapeutic drug. …

    Proceedings for Annual Meeting of The Japanese Pharmacological Society 92(0), 2-P-126, 2019

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  • Improvement Test for the Canopy Interception Parameterization Scheme in the Community Land Model

    Yang Minghao , Zuo Ruiting , Li Xin , Wang Liqiong

    … <p>The Qian atmospheric forcing dataset is used to drive version 4.5 of the Community Land Model (CLM4.5) in off-line simulation tests. … Based on the Global Land Evaporation Amsterdam Model (GLEAM) data, we attempt to ameliorate the canopy interception parameterization scheme in CLM4.5 by improving the empirical parameter and the physical structure. …

    SOLA 15(0), 166-171, 2019

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  • Study on Spin-up Time Saving for a Simulation of Submerged Intake Experiment with Three-Dimensional Numerical Model by Using Green's Function Approach  [in Japanese]

    TSUBONO Takaki , NIIDA Yasuo , MISUMI Kazuhiro , TSUMUNE Daisuke

    3次元温排水モデルにより2成層化した密度場の深層取水に関した水理実験を再現するには,定常となるために多くの計算ステップ数(Spin-up時間)が必要となる.そのためグリーン関数法(GFA)を用いて密度(塩分)の初期値を適切に推定して,定常状態になるまでの計算ステップ数を削減する方法を検討した.この方法により,初期流速を0として計算するよりも計算ステップ数が半分程度に抑えることができた.また,初期値 …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74(4), I_775-I_780, 2018

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  • Analysis of climate change impacts on water cycle in the Yodo river basin using meteorological / vegetation / hydrological models  [in Japanese]

    Goda Masahiro , Shimadera Hikari , Matsuo Tomohito , Kondo Akira

    森林植生は,降雨遮断や地下水涵養など,水循環において重要な役割を果たしている.そのため,気候変動による植生の変化は,水循環にも影響を及ぼす.これまで,気候変動が水循環に及ぼす影響の評価を目的として多くの研究が為されてきたが,植生の変化が水循環に及ぼす影響を考慮した研究は少ない.本研究では,気象モデル,動的植生モデル,水文モデルを用い,植生の変化を考慮して淀川流域の水循環に対する気候変動影響を評価し …

    Proceeding of Annual Conference 31(0), 20, 2018

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  • TECHNICAL THEORY AND VERIFICATION OF FLOWING WATER DIVERSION IN NEW RAINWATER DISCHARGE CHAMBER

    ODA Shuhei , ODA Kohei , ARAO Shinji

    … This study has proven validity from the viewpoint of practical management through numerical analysis of the splitting phenomenon and careful examination of the data of a hydraulic model experiment to verify the technical theories of the conventional direct control and the new indirect control in flowing water splitting. …

    Journal of JSCE 4(1), 197-210, 2016

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  • Characteristics of stable isotopes in precipitation in 2013 over Japan  [in Japanese]

    Tanoue Masahiro , Ichiyanagi Kimpei

    本研究では,2013年に集中観測された降水の同位体比データを用いて,天水線,降水量効果,温度効果の解析と検証を行った.観測された天水線の傾きは西日本で高く,東日本で低い傾向を示した.天水線の切片は日本海側で高く,太平洋側で低かった.このような天水線の空間分布特性は,同位体領域モデルでも再現されていたが,切片については過小評価していた.その一方,観測された温度効果は東日本で見られ,モデルでもその空間 …

    Proceeding of Annual Conference 29(0), 71, 2016

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  • Re-examination of the model for predicting interception ratio in coniferous plantatious in Japan.  [in Japanese]

    Nagano Miho , Inoue Akio , Maruyama Atsushi , Miyazawa Yoshiyuki , Takagi Masahiro , Otuki Kyoichi

    森林の管理が水資源に及ぼす影響を評価する上で,林分構造と蒸発散との関係を明らかにすることは重要である.蒸発散の主要な構成要素である遮断蒸発については,針葉樹林を対象として立木密度と遮断率との関係が,小松(2007)とKomatsu et al.(2015)によって求められている.これらの研究では,日本の針葉樹林における遮断率の観測事例を収集し,立木密度と遮断率との関係を直線式と指数式によってそれぞ …

    The Japanese Forest Society Congress 127(0), 115, 2016

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  • Models to predict changes in annual runoff with thinning and clearcutting of Japanese cedar and cypress plantations in Japan

    Komatsu Hikaru , Shinohara Yoshinori , Otsuki Kyoichi

    … To improve the predictability of ΔQ, it might be useful to model ΔQ for specific species and regions while considering underlying processes. … Model 1 predicts ΔQ assuming that ΔQ equals the decrease in canopy interception loss (ΔEi), which was further modelled by stem density using 46 data for interception loss. …

    Hydrological Processes (29), 5120-5134, 2015-11-29

    IR 

  • Construction of forest hydrological tree form model for Japanese cedar and cypress trees  [in Japanese]

    EBISU Nobuhiro , TAKASE Keiji , OTAKE Natsuko

    … <p>A simple and effective tree form model is needed for water cycle and rainfall interception studies in forest hydrological research. … The purpose of this study is to develop a two-dimensional tree model for Japanese cedar and cypress trees. … The model includes a functional relationship between branch lengths and tree height for a single tree. …

    Journal of the Japan Society of Erosion Control Engineering 68(1), 25-31, 2015

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  • FUNDAMENTAL STUDY ON THE REINFORCING EFFECT EXERTED BY SOFT PLASTIC IN LANDFILL 2  [in Japanese]

    KAWAI Seiji , SHIMAOKA Takayuki , SAKAGUCHI Shinya

    本研究は廃棄物埋立地盤中に含まれる軟プラスチックの連続または不連続な処分状況が,斜面安定性に及ぼす影響を明らかにすることを目的とする.傾斜した地山上に堆積した廃棄物埋立地盤を大型土槽内に再現し,軟プラスチックが充填試料の全体に混在し,連続的に存在する廃棄物連続ケースと,充填試料中央に軟プラスチックの不連続面を設けた廃棄物不連続ケースの比較実験を行った.その結果,両ケースの壁面での側圧分布は大きく異 …

    Geosynthetics Engineering Journal 30(0), 125-132, 2015

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  • IMPROVEMENT OF CASC2D MODEL FOR RAINFALL-RUNOFF SIMULATIONS IN A FORESTED CATCHMENT  [in Japanese]

    WEI Le-zhang , KINOUCHI Tsuyoshi

    … CASC2D model is a widely used event-based hydrologic model to simulate rainfall-runoff and sediment transports, but it is challenge for this Hortonian overland flow based model to simulate hydrologic processes in forested catchments. … In this study, CASC2D model was improved for continuous simulation in forested catchments by considering evapotranspiration, subsurface flow, groundwater storage, and modifying infiltration and interception methods. …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 70(4), I_157-I_162, 2014

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  • Investigation of the Effective Extraction of Fluid in the Fresh Groundwater Lens based on the Three-Dimensional Numerical Simulation  [in Japanese]

    INOUCHI Kunimitsu , URA Hiroki , TAKEI Yoshiki

    … In considering the effective water intake, the double pumping and water interception board methods were tried. … In the model case of circular symmetry topography, the usefulness of the perpendicular double pumping method was confirmed. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70(2), I_1221-I_1225, 2014

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  • TECHNICAL THEORY AND VERIFICATION OF FLOWING WATER DIVERSION IN NEW RAINWATER DISCHARGE CHAMBER  [in Japanese]

    ODA Shuhei , ODA Kohei , ARAO Shinji

    下水道先進地域が取組む合流式下水道改善事業は,合流式下水道システムで要の雨水吐室に流水分派精度での課題があり,その対応方策も低い改善効果や煩雑な維持管理への指摘があった.流水分派機能は,越流堰とオリフィスの水理現象を有機的に組合せ,従来技術は1回の分派で流量を直接制御するが,本研究は複数回の分派で水位変動を抑制する流量の間接制御を提案した.<br> 本研究は,流水分派における従来の直接 …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 70(2), 49-59, 2014

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  • Analysis for the Effect of Roof Greening in Warehouse by Mean of Simulation

    TAKAHASHI Noriko , NISHINA Hiroshige , TAKAYAMA Kotaro , FUTAGAMI Saori , KAMURA Takashi , NAKAHARA Teruhisa

    … Effects of roof greening on room air temperature in warehouse and cooling load in summer were investigated using simulation model. … The maximum room air temperature was decreased with increasing the light interception ratio and decrease in room air temperature with increasing light interception ratio in greening type 2 was larger than that in greening type 1. …

    Environment Control in Biology 51(3), 99-103, 2013-09-30

    J-STAGE  References (17)

  • Application of Gash analytical model and parameterized Fan model to estimate canopy interception of a Chinese red pine forest

    CHEN Shujun , CHEN Cungen , ZOU Chris B. , STEBLER Elaine , ZHANG Shuoxin , HOU Lin , WANG Dexiang

    Journal of forest research 18(4), 335-344, 2013-08-01

    References (33)

  • Estimation of canopy storage using a simple water balance model from Japanese cypress forest  [in Japanese]

    otake natsuko , ebisu nobuhiro , takase keiji

    樹冠貯留量を推定するために、ヒノキ林における樹冠遮断蒸発の水収支データの解析を行った。樹冠に十分に水分が保留された場合、降雨時における樹冠遮断蒸発の水収支式より貯留変化量がゼロとなり、[林外雨量-樹冠遮断蒸発量]に対する林内雨量の割合を樹冠遮断飽和度とし、それが1であると仮定する。この樹冠遮断飽和度が1になるときの樹冠遮断貯留量Scを算出したところ、平均降雨強度との相関関係が認められ、Scは常に一 …

    Proceeding of Annual Conference 26(0), 248, 2013

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  • Experimental study on canopy interception using artificial Christmas trees to evaluate evaporation during rainfall and the effects of tree height and thinning

    Murakami Shigeki , Toba Tae

    … Canopy interception (<i>I</i>) was measured using artificial Christmas trees that were set on three trays under natural rainfall. … Canopy interception rate (<i>I</i>/<i>P</i><sub>G</sub>) was comparable with that in the actual forest. … The model forest appears useful for studying the mechanisms of <i>I</i> …

    Hydrological Research Letters 7(4), 91-96, 2013

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  • Effect of Practice with Within-trial and Inter-trial Velocity Changes on Movement Correction under Various Novel Target Velocities

    Ikudome Sachi , Nakamoto Hiroki , Mori Shiro

    … Two possible practice methods were conducted, i.e., practice with direct interception of an accelerating target (within-trial target velocity changes; … WT practice), and practice with interception of 2 constant-velocity targets that are presented in uncertain order (inter-trial target velocity changes; … These results indicate that movement correction capability during interception can be improved by practice. …

    International Journal of Sport and Health Science 11(0), 39-48, 2013

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