Search Results 1-20 of 192

  • Prediction of skin permeation and concentration of rhododendrol applied as finite dose from complex cosmetic vehicles

    Arce Florencio Jr , 浅野 成美 , See Gerard Lee , 押坂 勇志 , 板倉 祥子 , 藤堂 浩明 , 杉林 堅次

    … In vitro skin permeation and concentration studies of RD were conducted from formulations containing water and polyols with concentrations ranging from 10 to 100% under infinite and finite dose conditions using vertical Franz diffusion cells. …

    International Journal of Pharmaceutics (578), 1-9, 2020-03

    IR 

  • Condensation Heat Transfer for Downward Flows of Steam-Air Mixture in a Circular Pipe

    MURASE Michio , UTANOHARA Yoichi , HOSOKAWA Shigeo , TOMIYAMA Akio

    … <p>In our previous study, we measured the radial and axial temperature distributions of steam-air mixture in a vertical circular pipe (diameter, 49.5 mm; … In this study, we have calculated the heat transfer coefficient of the condensate film <i>h<sub>f</sub></i> … with the Nusselt equation and evaluated the condensation heat transfer coefficient <i>h<sub>c</sub></i> …

    JAPANESE JOURNAL OF MULTIPHASE FLOW 34(4), 510-519, 2020

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  • Determination of Carrier Diffusion Length Using Transient Electron Photoemission Microscopy in the GaAs/InSe Heterojunction

    Emilio J. Juarez‐Perez , Yabing Qi

    … Carrier diffusion length and lifetime parameters for electron transport at nanoscale semiconductor slabs have been fitted using a 1D model and the decay data extracted from transient photoemission electron microscopy. …

    physica status solidi (b) 256(10), 1900126, 2019-05-20

    IR 

  • OBSERVATION OF VERTICAL INFILTRATION AND REPRESENTATION BY AN ANALYTICAL SOLUTION OF RICHARDS' EQUATION APPLICABLE TO DISTRIBUTED MODELS  [in Japanese]

    SUGAWARA Yoshito , SAYAMA Takahiro , TAKARA Kaoru

    <p> 物理式に基づき降雨流出を追跡する分布型モデルは,演繹的なパラメータにより,未曾有の大災害に対する予測手法として期待できる.しかし,その要素モデルの中で,山地の鉛直不飽和浸透は十分なモデル化がなされていない.本研究では,滋賀県の桐生水文試験地において土壌水分量と間隙水圧の観測を行った.土壌水分量は土層から風化基岩層の上部で測定を行い,その特性について議論した.間隙水圧については, …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 75(2), I_1243-I_1248, 2019

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  • STUDY ON VERTICAL DISTRIBUTION OF SUSPENDED SEDIMENT CONCENTRATION OVER SUBMERGED VEGETATION AREA  [in Japanese]

    AKAHORI Ryosuke , YAMAGUCHI Satomi , SATO Daisuke

    <p> 本研究では草本群落を想定した植生模型を有する水路に浮遊砂モデルとしてのPVC粒子を流下させ,浮遊砂濃度と流下方向流速の鉛直分布を観測し両者の関係を調べた.実験では植生模型の相対高さを変化させた際の濃度フラックスの変化も検討した.結果より,植生高さの変化が濃度フラックスの分布を変化させ,植生域での貯留量が18%程度変化することが示された.濃度分布を決定付ける拡散係数に関しては,流 …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74(5), I_949-I_954, 2018

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  • Soret coefficient of a sodium borate melt: Experiment with a vertical furnace and thermodynamic theory

    SHIMIZU Masahiro , HOSOYA Shohei , KATO Takeyuki , MATSUOKA Jun , KATO Hiroshi , NISHI Masayuki , HIRAO Kazuyuki , SHIMOTSUMA Yasuhiko , MIURA Kiyotaka

    … <p>The Soret effect or thermodiffusion is temperature-gradient-driven diffusion in a multicomponent system. … A physical model to accurately predict the Soret coefficient of oxide melts has not yet been proposed. … Here, for the first time, we report a quantitative comparison between experiment and theory concerning the Soret coefficient in binary glass-forming oxide melts. …

    Journal of the Ceramic Society of Japan 126(12), 997-1004, 2018

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  • Effect of diffusing layer thickness on the density-driven natural convection of miscible fluids in porous media: Modeling of mass transport

    WANG Lei , NAKANISHI Yuji , TESTON Alexis D. , SUEKANE Tetsuya

    … The thickness of the interface was changed by molecular diffusion with time, and the effective diffusivity in a porous medium was estimated. … Compared with the thick interface, for the thin interface, many fine fingers formed and extended rapidly in a vertical direction. …

    Journal of Fluid Science and Technology 13(1), JFST0002-JFST0002, 2018

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  • Evaluating Diffusion Parameters of Soil-Bentonite Mixture used for Containment  [in Japanese]

    TAKAI Atsushi , INUI Toru , KATSUMI Takeshi , MASUBUCHI Atsushi

    … <p>This paper is focused on chemical diffusion parameters of soil-bentonite mixture which is one of barrier materials commonly used for containment of ground contamination. …

    Journal of the Society of Materials Science, Japan 67(1), 63-66, 2018

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  • STUDY ON COLD STORAGE OF PHASE CHANGE MATERIAL ON THE FLOOR OF A HOUSE WITH NIGHT NATURAL VENTILATION  [in Japanese]

    LEE Taecheol , SATO Rihito , ASAWA Takashi , KAWAI Hidenori , HIRAYAMA Yukari , OHTA Isamu , SATO Yuki , HAYASHI Yoshihiko

    … We measured vertical air temperature distribution and inflow wind speed to understand indoor thermal characteristics. … Measurement summary on indoor thermal characteristics<br> Vertical air temperature distribution of indoor was influenced by inflow wind speed and ΔT. … In case that inflow wind speed was over 0.3m/s, indoor air was entirely mixed with outdoor air, thus vertical air temperature distribution tended to be disappeared.<br><br> 4. …

    Journal of Environmental Engineering (Transactions of AIJ) (742), 1025-1034, 2017-12

    J-STAGE  AIJ 

  • The influence of magma composition on the variation of the average aspect ratio of plagioclase in basaltic intrusives  [in Japanese]

    Kondo Kentaro , Hoshide Takashi

    マグマの冷却速度はマグマプロセスのタイムスケールを見積もる上で非常に重要である.Holness (2014) は過冷却度に応じて変化するとされる斜長石のアスペクト比について,5つの岩床と1つの溶岩湖でその垂直変化を調べ,アスペクト比と熱伝導計算で得られる冷却時間との間に逆相関があることを見出した.しかしながら,本論文では組成の近いソレアイト質の岩体を対象とし,マグマの組成の影響についてはあまり議論 …

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2017(0), 152, 2017

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  • Temporal and vertical distributions of anthropogenic 236U in the Japan Sea using a coral core and seawater samples

    Sakaguchi Aya , Nomura Tomoya , Steier Peter , Golser Robin , Sasaki Keiichi , Watanabe Tsuyoshi , Nakakuki Tomoeki , Takahashi Yoshio , Yamano Hiroya , 坂口 綾

    … A simplified depth profile model for 236U in the Japan Sea, using the reconstructed 236U value for the surface water together with observed depth profiles for 236U in the water column in 2010, yielded diffusion coefficients of 3.4–5.6 cm2/s for 6 sampling points. … The diffusion coefficient values obtained for the northern stations were relatively large, and fitting uncertainty was also larger for stations in the northern region. …

    Journal of geophysical research: Oceans 121(1), 4-13, 2016-01

    IR 

  • Study on mixing process of two component gases in vertical fluid layer  [in Japanese]

    TANAKA Yudai , TAKEDA Tetsuaki , FUNATANI Shumpei

    … <p>This study is to investigate the effect of natural convection and molecular diffusion on the mixing process under the stable density stratified fluid layer. … The experimental apparatus consists of a reverse U-sharped vertical slot and a storage tank. … The left side vertical slot consists of the heated wall and cooled wall. … The right side vertical slot nothing is inserted. …

    The Proceedings of the National Symposium on Power and Energy Systems 2016.21(0), E211, 2016

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  • Study on mixing process of two component gases in vertical fluid layer:-Effectiveness on natural convection and molecular diffusion  [in Japanese]

    TANAKA Yudai , TAKEDA Tetsuaki , FUNATANI Shumpei

    … <p>The purpose of this study is to investigate the effect of natural convection and molecular diffusion on the mixing process under the stable density stratified fluid layer of two component gas. … The experimental apparatus consists of a reverse U-sharped vertical slot and a storage tank. … The left side vertical slot consists of the heated wall and cooled wall. … The right side vertical slot does not insert anything. …

    The Proceedings of Mechanical Engineering Congress, Japan 2016(0), G0800104, 2016

    J-STAGE 

  • MPS-BASED SIMULATION OF SCOURING DUE TO SUBMERGED VERTICAL JET WITH SUB-PARTICLE-SCALE SUSPENDED LOAD MODEL  [in Japanese]

    IKARI Hiroyuki , GOTOH Hitoshi , TANBO Tomoya , EJIRI Tomoyuki

    巨大津波による防波堤の倒壊事例では,越流水の落下流による防波堤背後の砂地盤洗掘が主たる原因の一つである.本研究では,越流洗掘現象の再現の基礎的検証として,実験室規模の鉛直噴流洗掘計算を粒子法を用いて実施する.まず,砂地盤変形の精度を高めるために,応力・ひずみ速度に依存して値が増減する係数を適用した拡散項を砂地盤変形モデルに導入し,砂柱崩壊計算を通じてその効果を検証したところ,堆積形状や崩壊過程に関 …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71(2), I_19-I_24, 2015

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  • 11014 Numerical analysis on mixing process of two component gases in a vertical fluid layer  [in Japanese]

    HATORI Hirofumi , TAKEDA Tetsuaki , FUNATANI Shumpei

    … The numerical model was consisted of a reverse U-shaped vertical slot and a storage tank. … The heavy gas was transported to the slot by the molecular diffusion and localized natural convection. … As a result of analysis, generation time of natural circulation depended on not only molecular diffusion coefficient but also natural convection. …

    The Proceedings of Conference of Kanto Branch 2015.21(0), _11014-1_-_11014-2_, 2015

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  • Vertical Diffusion Coefficient under Stable Conditions Estimated from Variations in the Near-Surface Radon Concentration

    KONDO Hiroaki , MURAYAMA Shohei , SAWA Yousuke , ISHIJIMA Kentaro , MATSUEDA Hidekazu , WADA Akira , SUGAWARA Hirofumi , ONOGI Shigeru

    Vertical diffusion in a stable boundary layer near the surface is not clearly understood. … In the present study, the vertical diffusivity of radon and the height below which the concentration of radon is high are estimated from observations made at two levels (1.5 and 100 m) on the meteorological tower in the campus of the Meteorological Research Institute, Tsukuba, Japan, in November 2006. … The estimated vertical diffusivity was less than 0.05 m<sup>2</sup> …

    Journal of the Meteorological Society of Japan. Ser. II 92(1), 95-106, 2014

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  • A NUMERICAL SIMULATION METHOD OF OIL TRANSPORT AT SEA SURFACE AND HINDCAST SIMULATION OF OIL SPILL INCIDENTS  [in Japanese]

    MATSUZAKI Yoshitaka , FUJITA Isamu

    … 本研究では海上に流出した油の漂流予測を行うため,油膜自身の特性による油拡散(Spreading),流れの乱れによる乱流拡散(Diffusion)及び海表面流れによる移流を計算できる数値計算モデルである,油拡散粒子モデルを開発した.構築したモデルを用いて,2007年に発生した韓国泰安沖油流出事故と1997年に発生した東京湾油流出事故の2つの事例に関する再現計算を行った.同じモデルを用いて計算を行い,再現計算結果 …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 70(1), 15-30, 2014

    J-STAGE 

  • Confocal Microscopic Evaluation of Mixing Performance for Three-Dimensional Microfluidic Mixer

    YASUI Takao , BABA Yoshinobu , OMOTO Yusuke , OSATO Keiko , KAJI Noritada , SUZUKI Norikazu , NAITO Toyohiro , OKAMOTO Yukihiro , TOKESHI Manabu , SHAMOTO Eiji

    diffusion coefficient, 4.9 × … This method enables us to capture vertical section images for the fluid distributions of FITC and water at different three-dimensional microchannel structures of the MBT device. … The mixing ratio could be calculated by the fluorescence intensity at each pixel of the vertical section image; …

    Analytical Sciences 28(1), 57, 2012

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  • Hindcast Simulation of Oil Spill Incident off the Taean Coast in South Korea Using Oil Spreading and Diffusion Particle Model

    MATSUZAKI Yoshitaka , FUJITA Isamu

    … In this study, we developed an oil spreading and diffusion particle model. … We discussed about vertical and horizontal eddy viscosity coefficients because their coefficients affected the simulation results. … We proposed vertical eddy viscosity coefficient equal to 0.10m<sup>2</sup>/s and horizontal eddy viscosity coefficient equal to 30m<sup>2</sup>/s. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 67(2), I_431-I_435, 2011

    J-STAGE 

  • J056022 Estimation of Mass Transfer across the Air-Water Interface in the High Speed Wind Region with Breaking Waves  [in Japanese]

    IWANO Koji , TAKAGAKI Naohisa , ILYASOV Emil , KUROSE Ryoichi , KOMORI Satoru

    … The CO_2 transfer coefficient in the liquid side, kL, is measured by applying the mass-balance method to CO_2 evasion experiments. … In the mass-balance method, vertical and horizontal distributions of wind velocity and CO_2 concentration in air are taken into account. …

    The Proceedings of Mechanical Engineering Congress, Japan 2011(0), _J056022-1-_J056022-3, 2011

    J-STAGE 

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