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TAKANO Yasuhide

    Department of Civil and Environmental Engineering　Associate Professor
Last Updated :2024/04/25

Researcher Information

Degree

  • (BLANK)（1999/12 University of Fukui）

J-Global ID

Research Areas

  • Environmental science/Agricultural science / Horticulture
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Civil engineering (environmental systems)
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Hydroengineering
  • Natural sciences / Atmospheric and hydrospheric science

Education

  • 1995/04 - 1999/12  University of Fukui  工学研究科  システム設計工学
  •        - 1999  University of Fukui  Graduate School, Division of Engineering
  •        - 1993  University of Fukui  Faculty of Engineering  環境設計工学科
  •        - 1993  University of Fukui  Faculty of Engineering

Association Memberships

  • 日本地下水学会   水文・水資源学会   土木学会   

Published Papers

  • A. Rack; H. Sekiguchi; K. Uesugi; N. Yasuda; Y. Takano; T. Okinaka; A. Iguchi; L. Milliere; B. Lukić; M.P. Olbinado; T.G. Etoh
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Elsevier BV 1058 168812 - 168812 0168-9002 2024/01 [Refereed]
  • Yasuhide TAKANO; Takayuki FUMOTO; Katsuyuki KAWAI
    土木学会論文集 B1(水工学)(Web) 77 (2) I_1357 - I_1362 2185-467X 2021/12 [Refereed]
  • Yasuhide TAKANO; Shoma SUGAKI; Kazuyuki NAKAKITA; T. Goji ETOH; Kohsei TAKEHARA
    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) Japan Society of Civil Engineers 77 (2) I_919 - I_924 2021/12 [Refereed]
  • 1億枚／秒のマルチフレーミングセンサによる飛翔する光の撮影
    高野 保英; 沖中 知雄; 竹原 幸生; 中野 人志; 下ノ村 和弘; 林 直樹; 三井 鷹; 江藤 剛治
    可視化情報学会論文集 39 (9) 35 - 40 2019/08 [Refereed]
  • Takeharu Goji Etoh; Tomoo Okinaka; Yasuhide Takano; Kohsei Takehara; Hitoshi Nakano; Kazuhiro Shimonomura; Taeko Ando; Nguyen Ngo; Yoshinari Kamakura; Dao Vu Truong Son; Anh Quang Nguyen; Edoardo Charbon; Chao Zhang; Piet De Moor; Paul Goetschalckx; Luc Haspeslagh
    Sensors 19 (10) 2247 - 2247 2019/03 [Refereed]
  • SEDIMENT DYNAMICS BEHAVIOR AND BEACH PROFILE TYPES BASED ON SEDIMENT PROPERTIES
    Gozo Tsujimoto; Masahiro Tamai; Yasuhide Takano; Ryuta Yamaguchi
    ICCE2018 2019/01 [Refereed]
  • TSUJIMOTO Gozo; HOKAMURA Takaomi; TABATA Kengo; OHTA Hikaru; NAKAJYO Sota; TAKANO Yasuhide
    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Japan Society of Civil Engineers 73 (3) I_601 - I_606 2017/10 [Refereed]
     
     The geomorphological changes of tidal flats adjacent to Shirakawa River mouth due to flush flood after earthquakes on April 14 and 16, 2016 were examined through field observation data. There was about 0.41m ground subsidence around field observation site. Therefore, the cross-shore bottom profiles could not return to the averaged profiles. The measured profiles were analyzed by the three parameters and the correlation among them was so high. The clinoform along the water-route propagated to off-shore approximately 150m during 2014 to 2016 after the earthquake. The estimated sediment discharge was 1.1*105m3/yr/km2, which correspond to four times during 1978 to 1997.
  • ONO Shogo; TSUJIMOTO Gozo; TABATA Kengo; HOKAMURA Takaomi; TAKANO Yasuhide
    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) Japan Society of Civil Engineers 73 (2) I_624 - I_629 2017/06 [Refereed]
     
     After the earthquakes have happened in April 2016, a large amount of cohesive sediments have flowed into the Shirakawa river mouth delta due to heavy rains. It was found by field observations that the clinoform in the infralittoral zone moved forward at about 100m from 2014 to 2016. Simple flume experiments were conducted in an acrylic–walled flume. A mix turbid water of water and mud was fed along the bottom bed with a constant discharge. Both of velocity values and suspended sediment concentration values were measured at the same time. The horizontal velocities were accelerated due to turbid waters. That was remarkable for high-concentration turbid waters. Settling velocity is increasing with the increase of the salinity and the mud concentration. But it has a maximum value around 16000ppm of the mud concentration.
  • TSUJIMOTO Gozo; TAMAI Masahiro; TAKANO Yasuhide
    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Japan Society of Civil Engineers 72 (2) I_1705 - I_1710 2016/11 [Refereed]
     
     The geological features in singing sandy beaches can be devied into three types. These are the dynamic equilibrium becch, indicating the domination of pocket beaches it the area. The prominent sand color in singing sandy beaches was brawn. The major chemical elements are as follows; Si, Al, Ca, Fe, Na, K and Mg. There is little difference between singing sandy beaches and general sandy beaches on chemical elements. However, Ohyama beach in Yamaguchi Prefecuter is rich in Ca. The 1st peack frequency of singing sand sound is related to sand grain size, 2nd the sorting coefficient.
  • HISASUE Nobuyuki; TAKEHARA Kohsei; SHINDOU Seishiro; TAKANO Yasuhide
    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) Japan Society of Civil Engineers 72 (4) I_571 - I_576 1880-8751 2016 
    In general intake facilities of hydroelectric power stations, intake vortices cause the air-hammer phenomena in the intake tunnel and the cavitation phenomena at blades of a water turbine generator by air-entrainments. In order to understand hydraulic characteristics of a vortex-suppressing device in a vertical intake facility, flow fields in the basic model of a vertical intake facility that combined a rectangular linear channel and a vertical pipe have been measured using a Particle Tracking Velocimetry (PTV). As a result, the relationship between installation positions of a vortex-suppressing device and number of occurrences of intake vortices indicates that the vortex-suppressing device installed near free surface and near vertical pipe is more effective.
  • Hoang Dung Nguyen; Okinaka Tomoo; Takano Yasuhide; Takehara Kohsei; Vu Truong; Son Dao; Etoff Takeharu Goji
    MECHANICAL ENGINEERING JOURNAL 3 (6) 2187-9745 2016 [Refereed]
  • 大気放電閃光過程の超高速ビデオカメラによる撮影
    竹原幸生; 高野保英; 杉原大仁; 江藤剛治
    高速度イメージングとフォトニクスに関する総合シンポジウム2015論文集 2015/11
  • TSUJIMOTO Gozo; TAKANO Yasuhide; TAMAI Masahiro
    PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING Japan Society of Civil Engineers 71 (2) I_751 - I_756 1884-2399 2015/11 [Refereed]
     
    Sand samples along the shorelines and in the rivers of Tottori Prefecture were assayed for chemical elements using energy dispersive X-ray spectrometer. Samples contained more than 60 wt% Si, Al, Ca, Fe, Na and Mg less than 10 wt%. It was found by EOF analysis that Si, Al, Ca and Fe were the significant chemical elements. The spatial variations of first mode of Si are related to sediment dynamic behavior. The transport regime is net accretion when the first mode value of Si is increasing, and net erosion when being decreasing.
  • HISASUE Nobuyuki; TAKEHARA Kohsei; SHINDOU Seishiro; TAKANO Yasuhide
    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) Japan Society of Civil Engineers 71 (4) I_523 - I_528 2185-467X 2015/02 [Refereed]
     
    In intake facilities of a hydroelectric power station, intake vortices cause an air-hammer in an intake tunnel and a cavitation at turbine blades of a water turbine generator by air-entrainments. In order to understand hydraulic characteristics of intake vortices in a vertical intake facility, flow fields in the basic model of a vertical intake facility that combined a rectangular linear channel and a vertical pipe have been measured using a Particle Tracking Velocimetry(PTV). In the horizontal plane near the free surface around the end of the intake channel, the results show that vortices generated at the both sidewalls move to the occurrence region of intake vortices. And in the vertical plane at the center of the intake channel, the results show that local vortices unrelated to the approach flows occur at the outer edge of the vertical pipe.
  • Takehara Kohsei; Hisasue Nobuyuki; Takano Yasuhide
    PROCEEDINGS OF THE 36TH IAHR WORLD CONGRESS Japan Society of Civil Engineers 70 (4) 4147 - 4154 2185-467X 2015 [Refereed]
     
    Air entrainments by vortices at water surfaces inside surface intake facilities of electrical power plants cause some problems, such as deterioration of power generation, destruction of blade in a turbine, etc. To suppress air entrainments by the vortices, some vortex-preventing devices have been proposed and have been used in many electrical power plants. The vortex-preventing devices used in the intake facilities are working effectively in many cases. However, the hydraulic properties of flow structure by the vortex-preventing devices are still unclear.
    In this paper, the effects of the vortex-preventing devices in surface intake facilities have been investigated experimentally by using the particle tracking velocimetry. The results show that the vortex-preventing devices suppress the turbulent intensity and the vorticity inside the facility.
  • TAKEHARA Kohsei; HISASUE Nobuyuki; TAKANO Yasuhide
    PROCEEDINGS OF THE JAPANESE CONFERENCE ON HYDRAULICS Japan Society of Civil Engineers 70 (4) I_757 - I_762 2185-467X 2014/02 [Refereed]
     
    Air entrainments by vortices at water surfaces inside surface intake facilities of electrical power plants cause some problems, such as deterioration of power generation, destruction of blade in a turbine, etc. To suppress air entrainments by the vortices, some vortex-preventing devices have been proposed and have been used in many electrical power plants. The vortex-preventing devices used in the intake facilities are working effectively in many cases. However, the hydraulic properties of flow structure by the vortex-preventing devices are still unclear.
    In this paper, the effects of the vortex-preventing devices in surface intake facilities have been investigated experimentally by using the particle tracking velocimetry. The results show that the vortex-preventing devices suppress the turbulent intensity and the vorticity inside the facility.
  • TAKANO Yasuhide; TAKEHARA Kohsei
    PROCEEDINGS OF THE JAPANESE CONFERENCE ON HYDRAULICS Japan Society of Civil Engineers 70 (4) I_523 - I_528 2185-467X 2014 
    To measure the falling velocities, the diameters and the aspect ratios of raindrops, consecutive images of raindrops in the open air outside of our laboratory were captured by an ultra-high-speed video camera. For automatic image capturing and avoiding the damage to the image sensor of the video camera due to the strong continuous illumination, a new trigger device was newly introduced to the capturing setup.
    As a result of the image analysis of the falling raindrops images, the following findings were obtained, when the equivalent raindrop diameter is smaller than 3mm. (1)The relationship between the falling velocity and the raindrop diameter determined by our outdoor measurement is similar to that between the terminal velocity and the water drop diameter determined by Gunn and Kinzer's indoor experiment. (2)The aspect ratios of raindrops determined by our measurement is similar to that calculated by Pruppacherr's model of raindrop.
  • TAKEHARA Kohsei; ETOH Goji; TAKANO Yasuhide
    Journal of applied mechanics Japan Society of Civil Engineers 70 (2) I_709 - I_716 2185-4661 2014 
    We have found that cavitation bubbles are generated when a sphere, which is freely falling from a height of several cm above the bottom, is impacting onto a bottom wall. The cavitation bubbles can be categorized into the following three types: 1) a single disk-like bubble generated at the impacting point, 2) multiple spherical bubbles generated away from the impacting point, and 3) multiple bubbles generated at the surface of the sphere and bottom wall. To clarify the generation mechanism of the cavitation bubbles, the following three kinds of experiments are conducted: (1) the experiment of the single free falling sphere impacting onto the flat buttom plate, (2) the experiment of the single sphere pulling up from the flat bottom plate, and (3) the experiment of impact force acting onto a half sphere fixed to a flat bottom plate. The motion of the sphere has been analyzed by using image processing techniques. The result of the experiments shows that the generation mechanisms of the cavitation bubbles are related to the acceleration of the impacting sphere and the shock pressure generated by the impact of the sphere.
  • 超高速動画撮影による雨滴落下速度の計測
    髙野 保英; 竹原 幸生; 江藤 剛治
    高速度イメージングとフォトニクスに関する総合シンポジウム2009論文集 22 - 27 2009/12
  • 髙野 保英; 竹原 幸生; 江藤 剛治
    土木学会論文集B 土木学会 65 (4) 332 - 340 2009/12 
    超高速ビデオカメラによる雨滴の撮影に成功し，撮影画像から雨滴の落下速度と粒径の関係を得た．さらにデジタル画像処理により，雨滴形状の変化などを短い時間間隔で求め得ることを示した．
  • TAKANO Yasuhide
    Journal of the Faculty of Science and Technology, Kinki University Kinki University 43 (43) 47 - 51 0386-4928 2007/09 
    To analyze the diffusion mechanism of Suspended Particulate Matter (SPM) in the atmosphere, horizontal and vertical distributions of SPM are needed. Existent SPM sampler is so big and heavy that it is not suitable to measure vertical SPM distribution. Small SPM sampler which can hang from spring of a captive balloon has been developed by author. This sampler that runs on batteries consists of a filter holder for personal dust sampler and a small vacuum pump, and weighs about 700g. Quantity of SPM collected on the filter is measured from the micrograph captured by the field emission scanning electron microscope (FE-SEM). SPM number, temperature, relative humidity and wind velocity profiles were measured using this small SPM sampler and the captive balloon at the riverside and near the highway. SPM number profile up to 50m in height near the highway shows the difference of the SPM distribution.
  • TAKANO Yasuhide; ETOH Takeharu; TAKEHARA Kohsei
    Transactions of Visualization Society of Japan The Visualization Society of Japan 26 (2) 211 - 214 0916-4731 2006/09 
    To measure the diameter and the terminal velocity of the naturally falling raindrops, consecutive images of the falling raindrops were taken by using the ultra-high-speed video camera developed by the authors. The terminal velocity and the diameter of the raindrops were calculated from these images.
    As a result, the behavior of the raindrops that moved downward along with the time passage was clearly observed from the consecutive images, and the relationship between the terminal velocity and diameter was obtained.
  • 画像計測による風波界面近傍の流れ場計測
    竹原 幸生; 江藤 剛治; 髙野 保英; 寺澤 泰一
    日本流体力学会年会2006講演論文集 日本流体力学会 2006/09
  • ETOH T. Goji; TAKEHARA Kohsei; TAKANO Yasuhide
    Transactions of Visualization Society of Japan The Visualization Society of Japan 26 (2) 227 - 230 0916-4731 2006/09 
    The authors have developed image sensors for vide cameras with the maximum frame rate more than 1, 000, 000 fps (frames per second). They also have designed an image sensor, the PC-ISIS, Photon-Counting In-situ Storage Image Sensor, with the ultra-high frame rate and the ultra-high sensitivity close to the photon-counting sensitivity as well, which is under preliminary evaluation. The sensor is based on the innovative structures for the ultra-high performance, such as the ISIS structure for the ultra-high frame rate, and the CCM, Charge Carrier Multiplier, together with the backside illumination and cooling for the ultra-high sensitivity. Once the performance of the PC-ISIS is confirmed, some derivatives of the sensor that have also ultra-high performance can be designed for various scientific and engineering applications by using the structures and the process applied to the PC-ISIS. A cooperative research project is proposed to search for the possible applications and to prepare the specific designs for the various applications.
  • HIRAI Kosuke; OZONO Masashi; DEGUCHI Takashi; TSUBAKI Ryota; FUJITA Ichiro; MUTO Yasunori; KANDA Keiichi; TAKEHARA Kosei; TAKANO Yasuhide
    Transactions of Visualization Society of Japan The Visualization Society of Japan 26 (2) 35 - 38 0916-4731 2006/09 
    The confluence region downstream of the Katsura River, the Kizu River and the Uji River in Kyoto displays complicated flow patterns depending on which watershed undergoes larger precipitations. The flow characteristics at this location have not been clarified so far due to the complexity of the combining streams. In the present study, in order to obtain the flow features in normal flow conditions, surface flow measurement by using a helicopter is performed. The surface flow is visualized by biodegradable tracers and they are videotaped from a helicopter hovering at about 300 meter height following the cloud of tracers. A high-vision video camera is used for recording the images and the velocity of the tracers are analyzed by applying PIV with subtracting background movement. At the same time, distributions of temperature, pH, and other parameters related to water quality are measured by multi-purpose instrument installed on a boat. It was found that water quality of the Ktsura River is quite different from the other rivers and the longitudinal dispersion of tracers is evident at the location.
  • TAKEHARA Kohsei; HISASUE Nobuyuki; ETOH T. Goji; TAKANO Yasuhide
    PROCEEDINGS OF HYDRAULIC ENGINEERING Japan Society of Civil Engineers 50 715 - 720 0916-7374 2006/02 
    A Particle Tracking Velocimetry is applied to surface and internal flow measurements in an actual river model. New techniques are proposed for the flow measurements. In the measurements of surface flows, two CCD video cameras, which are exactly synchronized, are used in order to measure detailed flow vectors in a wide area. In this experiment, one CCD camera captures wider area for understanding global flow patterns. The other camera focuses on local area where flow geometry is complicated. In addition to the surface flow measurement techniques, an internal flow measurement technique is also proposed by using a bore lens system. The proposed techniques are applied to an experiment, in which an actual river model is used. The results show reasonable velocity distributions compared with the results of standard point measurements.
  • ETOH Takeharu; TAKEHARA Kohsei; TAKANO Yasuhide; OKUNO Satoshi; FUJITA Ichiro; SAKAI Nobuyuki
    Doboku Gakkai Ronbunshu Japan Society of Civil Engineers (796) 39 - 54 0289-7806 2005/08 
    This case study aims at development of a local remote sensing technology for measurement of surface flow field of rivers and rakes by means of PTV, Particle Tracking Velocimetry. Six thousand flat rice cakes with the diameter of 15 cm were scattered on the Uji river as tracers. A video camera mounted on a helicopter, hovering at the height of 300 m, took continuous images of the flow. Many problems associated with the practical applications of PTV to natural flow fields were picked up. Among them, there was a problem in identification of tracer images in that the computer software could not separate images of light reflections due to wind-driven surface tension waves from the tracer images. Countermeasures to the problems were proposed and tested. The surface flow field was analyzed by the PTV with the countermeasures, and compared with the flow field at 20-cm below the surface measured with an ADCP, Acoustic Doppler Current Profiler.
  • HE Chao; FUKUHARA Teruyuki; TAKANO Yasuhide
    JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES 18 (3) 221 - 232 0915-1389 2005/05 
    In order to better understand the hazard of secondary salinization in soils associated with inappropriate water management, the salt movements during the infiltration and evaporation after watering over the soil surface were investigated using soil columns with a shallow water table. Although the linkage of the infiltrated water and groundwater enhances the leaching of the salt contained in the soil surface layer, but the subsequent upward moisture movement due to the evaporation eventually increases the salt content near the soil surface more than the initial level before the watering.
    Furthermore, a heat, moisture and solute transfer model in a saturated, an unsaturated and a dry soil layer was extended to calculate the condensation and crystallization of the salt content as well as the soil temperature, the volumetric water content and the vapor density profiles. The present model could well reproduce the experimental results. However, after the surface dry layer was appeared, the difference between calculated soil moisture content profiles and observed ones became conspicuous near the bottom of dry layer. It is pointed out that the reason may be attributed to the inaccuracy of the soil moisture characteristic curve and of the hydraulic conductivity in the low water content state.
  • N Ootsuka; TG Etoh; K Takehara; S Oki; Y Takano; Y Hatsuki; S Thoroddsen
    26th International Congress on High Speed Photography and Photonics SPIE-INT SOC OPTICAL ENGINEERING 5580 153 - 162 0277-786X 2005 [Refereed]
     
    In 2001, an ultra-high-speed video camera of 1,000,000 frames per second was developed in Hydraulics Laboratory of Kinki University. The image sensor of the camera was the ISIS-V2, the In-situ Storage Image Sensor-Version 2. The camera has been applied to visualization of high-speed phenomena in various fields of science and engineering. We observed entrapment phenomena of bubbles resulting from thermal spraying of metals. Thermal spraying is used to improve solid surfaces by spraying melted metal or ceramic particles to the surfaces. One of the problems relating to the thermal spraying is entrapment of air bubbles under the metal or ceramic layers covering the solid surfaces. The bubbles decrease bonding strength of the layers made by the thermal spraying. The entrapment processes were successfully visualized by application of the ultra-high-speed video camera.
  • K Takehara; N Ohtsuka; TG Etoh; Y Takano; G Tsujimoto; N Mizutani
    Coastal Engineering 2004, Vols 1-4 WORLD SCIENTIFIC PUBL CO PTE LTD 1060 - 1071 2005 
    In order to clarify the mechanisms of wind waves, the air and water flows close to the water surface were simultaneously measured by using the Image Velocimetry, the IV. In this study, a Particle Tracking Velocimetry, so-called PTV, was used as IV, which can measure the velocity vectors in the vicinity of the water surface. The experiments were carried out in the range where whitecaps cannot appear. From the measured planar velocity distributions, the instantaneous vorticity distributions in air and water were evaluated.
  • 髙野 保英; 竹原 幸生; 江藤 剛治
    水工学論文集 土木学会 48 187 - 192 2004/02 
    近畿大学屋上に設置した屋上緑化区画において，緑化屋上からの蒸発散量の集中観測を実施し，排水中の人工物起源の物質を調べた．
  • ST Thoroddsen; TG Etoh; K Takehara; Y Takano
    JOURNAL OF FLUID MECHANICS CAMBRIDGE UNIV PRESS 499 139 - 148 0022-1120 2004/01 [Refereed]
     
    We use a novel ultra-high-speed video camera to study the initial stage of the impact of a solid sphere onto a liquid surface, finding a high-speed horizontal jet which emerges immediately following the intial contact. For Re > 2 x 10(4) the jet emerges when the horizontal contact between the sphere and the liquid is only 12% of its diameter. For the largest Reynolds numbers this Jet can travel at more than 30 times the impact velocity of the sphere. This Jetting occurs sooner and at much higher normalized velocities than has been observed previously. The breakup of the jet into a spray of droplets sometimes occurs through formation of pockets in the liquid sheet. Early in the impact, the energy transferred to the jet and the subsequent spray sheet is estimated to be much larger than the energy associated with the added mass inside the liquid pool. The jetting will therefore greatly increase the initial impact force on the sphere.
  • 福原 輝幸; 髙野 保英; 南条 雅志; YANG J
    地下水技術 地下水技術協会 46 (1) 26 - 42 0916-4154 2004/01 
    2次的塩害におよぼす塩集積層深さと散水量の影響を調べるために，乾燥土壌中に初期塩集積層を設け，散水と蒸発の繰り返しによる塩移動実験を行った．
  • HE Chao; FUKUHARA Teruyuki; TAKANO Yasuhide; NANJO Masashi; YANG Jingsong
    土木学会論文集 .土木学会 747 (Ⅱ-65) 15 - 28 0289-7806 2003/11 
    高野が提案した乾燥―不飽和土壌中の液状、蒸気状水及び熱移動解析モデルを改良し、物質移動式を組み合わせた、熱・水分・物質移動モデルを構築した。計算結果は実験結果を良好に再現、モデルの妥当性が検証された。
  • TAKANO Yasuhide; ETOH T. Goji; TAKEHARA Kohsei; FUKUHARA Teruyuki
    土木学会論文集 .土木学会 748 (Ⅶ-29) 57 - 65 0289-7806 2003/11 
    近畿大学内に屋上緑化区画および微気象・水文観測システムを構築した。蒸発散量の実測による緑化屋上における植生維持に必要な水量の算定、および緑化区画からの排水の水質調査を試みた。
  • 竹原 幸生; 江藤 剛治; 髙野 保英; 大塚 直; 辻本 剛三; 水谷 夏樹
    海岸工学論文集 Japan Society of Civil Engineers 50 96 - 100 0916-7897 2003/11 
    水表面での気体輸送現象に大きく関係する，水表面極近傍の気流・水流の同時計測した．
  • 竹原 幸生; 江藤 剛治; 髙野 保英; 大塚 直; 水谷 夏樹; 辻本 剛三
    海岸工学論文集 土木学会 50 86 - 90 0916-7897 2003/11 
    風波波面先端部に生じるマイクロブレーキング現象を，高速ビデオカメラおよびPTVにより計測した．
  • 佐々木 孝; 髙野 保英; Rabindra Raj Giri; 佐藤 邦明; 和田 明
    地下水技術 地下水技術協会 45 (9) 26 - 42 0916-4154 2003/09 
    4つの異なった土地利用条件のとで，地表面の汚染された土壌から地下浅層へのTCE（DNAPLの典型）の移行について，液相と気相の比較検討を行った．
  • 竹原 幸生; 江藤 剛治; 髙野 保英; 大塚直; 水谷夏樹; 辻本剛三
    海岸工学論文集 .土木学会 50 86 - 91 0916-7897 2003/05 
    風波によるマイクロブレーキング現象の空間構造を解明するため、3 台のCCD カメラを用いて、広範囲かつ高解像度のPTV 計測を行った。波動場全体を把握した上で、水表面極近傍の詳細な計測結果が得られた。
  • 髙野 保英; 江藤 剛治; 竹原 幸生
    可視化情報学会誌 可視化情報学会 23 (89) 85 - 88 2003/04 
    高速度ビデオカメラに対するユーザの要求仕様に関して、日本全国の3,000人の研究者･技術者に対してなアンケート調査をおこなった。その回答を客観的に分析してユーザーの要望する基本性能を求めた。
  • TG Etoh; D Poggemann; G Kreider; H Mutoh; AJP Theuwissen; A Ruckelshausen; Y Kondo; H Maruno; K Takubo; H Soya; K Takehara; T Okinaka; Y Takano
    IEEE TRANSACTIONS ON ELECTRON DEVICES IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC 50 (1) 144 - 151 0018-9383 2003/01 
    An image sensor for a video camera of 1 000 000 frames per second (fps) was developed. The specifications of the developed sensor are as follows: 1) frame rate: 1 000 000 fps; 2) pixel count: 81 120 (= 312 x 260) pixels; 3) total number of successive frames: 103 frames; 4) gray levels: 10 b; and 5) open area of each pixel (fill factor): 580 square micrometers (13%). The overwriting function is installed for synchronization of image capturing with occurrence of the target event. Sensitivity is significantly high with the large photogate. Some innovative technologies were introduced to Achieve ultrahigh performance, including slanted linear CCD in situ storage, curving design procedure, and a CCD switch with fewer metal shunting wires. They are applicable to the development of other new high-performance image sensors.
  • GIRI RABINDRA RAJ; SATO KUNIAKI; WADA AKIRA; TAKANO YASUHIDE; SASAKI TAKASHI
    Journal of Hydroscience and Hydraulic Engineering 土木学会 20 (2) 51 - 69 0912-2508 2002/11 
    代表的な大気 陸面間の熱・水分輸送解析モデルであるSALSAと、土壌中の熱・水分・DNAPL輸送モデルを結合し、大気 土壌間の熱、水分およびDNAPLの鉛直一次元解析を試み、その妥当性を検証した。
  • 竹原 幸生; 江藤 剛治; 髙野 保英; 真木正弘
    海岸工学論文集 社団法人 土木学会 49 66 - 70 0916-7897 2002/11 
    風波による気体輸送現象解明のため、水表面近傍の気流および水流の画像計測を行った。
  • TAKANO Yasuhide; TANAKA Kenji; SHIGEMATSU Takaaki; ETOH Goji; TAKEHARA Kohsei
    Transactions of Visualization Society of Japan The Visualization Society of Japan 22 197 - 200 0916-4731 2002/07 
    Visualization of water flow around structures or in porous media requires refractivity matching of water and the transparent solid materials. The authors have developed two methods to make transparent spheres from silicon rubber; the stirring method and the casting method. Visualization experiments of water flow around a sphere coming up to the surface and in a porous medium were performed to examine the validity of the refractivity matching method. Velocity vectors of these flows were obtained from recorded particle images by a PTV algorithm, while was also developed by the authors.
  • ETOH Goji; TAKEHARA Kohsei; OKUNO Satoshi; TAKANO Yasuhide
    Transactions of Visualization Society of Japan The Visualization Society of Japan 22 357 - 360 0916-4731 2002/07 
    The Infrared PTV (Particle Tracking Velocimetry) is proposed for applications to measurements of surface velocity fields of local water bodies, such as rivers, lakes, ponds, estuaries and coastal areas. The tracers are either ice particles or soaked and frozen flat edible cakes. The cameras are infrared sensitive. PTV algorisms can be applied to the infrared particle images. The system can measure detailed surface velocity fields of floods even in the darkness. No or negligible pollutant is supplied respectively by the ice particles or the flat cakes.
  • TAKEHARA Kohsei; ETOH Goji; TAKANO Yasuhide
    日本流体力学会年会2002講演論文集 日本流体力学会 2002 208 - 209 2002/07 
    A method to measure surface tension of water was developed by measuring the properties of capillary waves. An advantage of this method is to be able to measure surface tension without disturbances of the surface, which usually occur in standard methods of measurement of surface tensions. Capillary waves are generated by vibrating cylinder at the center of water tank. The properties of capillary waves are measured by using high speed video camera and two laser beams.
  • Measurements of River Flow by ITV Video Camera
    竹原 幸生; 髙野 保英; 藤田一郎
    河川技術論文集 社団法人土木学会水理委員会河川部会 46 459 - 464 2002/06 
    淀川の両岸だけで50セット以上のビデオカメラが設置され、様々のモニタリングを行っている。このカメラを洪水時の流れ計測に利用するという試みである。
  • ETOH T. Goji; MUTOH Hideaki; TAKEHARA Kohsei; OKINAKA Tomoo; TAKANO Yasuhide
    ITE Technical Report The Institute of Image Information and Television Engineers 26 (26) 27 - 33 1342-6893 2002/03 
    An image sensor of 1,000,000 fps with image storage for consecutive 103 images is developed, which is called ISIS, In-situ Storage Image Sensor. Various innovative ideas support this achievement. Each pixel of the sensor has its own in-situ storage area of image signals during an image capturing phase, image signals generated in the photo-sensitive areas of all pixels are simultaneously recorded in the in-situ storage areas without being readout from the sensor, which realizes parallel recording at all pixels and, thus, image capturing at the ultimate high frame rate.
  • Evaluation of Evaporation and Heat and Moisture Monitoring during Post-irrigation Drying
    何 超; 髙野 保英; 福原 輝幸
    Proceedings of International Conference on Water Resources Management in Arid Regions 1 269 - 278 2002/03 
    アラブ首長国連邦において，sandy soilの散水後の蒸発・乾燥過程を追跡し，蒸発量の観測結果とバルク式および土壌水分拡散方程式から求めた計算結果との比較を行った．
  • ETOH Takeharu; MUTOH Hideaki; TAKEHARA Kohsei; TAKANO Yasuhide; OKINAKA Tomoo
    The Journal of the Institute of Television Engineers of Japan The Institute of Image Information and Television Engineers 56 (3) 483 - 486 1342-6907 2002/03 
    撮影速度 100 万枚／秒のビデオカメラ用撮像素子 ISIS を開発した。
  • TAKEHARA Kohsei; FUJITA Ichiro; TAKANO Yasuhide; ETOH Goji T.; AYA Shiro; TAMAI Masahiro; MIYAMOTO Hitoshi; SAKAI Nobuyuki
    PROCEEDINGS OF HYDRAULIC ENGINEERING Japan Society of Civil Engineers 46 809 - 814 0916-7374 2002/02 
    Field measurements of surface flows on a river by using a helicopter were carried out. Image Velocimetry (IV) is applied for measurement of surface flow of the river. The images are taken by a video camera which is built in the helicopter. For tracers of surface river flows, the “Senbei” is selected because of its decomposable in natural situation.
  • T. Goji Etoh; D. Poggemann; A. Ruckelshausen; A. Theuwissen; G. Kreider; H. O. Folkerts; H. Mutoh; Y. Kondo; H. Maruno; K. Takubo; H. Soya; K. Takehara; T. Okinaka; Y. Takano; T. Reisinger; C. Lohmann
    Digest of Technical Papers - IEEE International Solid-State Circuits Conference 0193-6530 2002 [Refereed]
     
    A single-chip CCD image sensor captures > 100 successive images at > 1 Mframes/s. The pixel count of test chip is 312 × 260 (=81,120) pixels. Charge handling capacity is 40 k electrons. Grey levels are 10b. Fill factor is 13%. On-chip overwriting mechanism makes possible continuous recording of the latest image signals, draining the old ones to the substrate.
  • GT Etoh; K Takehara; Y Takano
    JOURNAL OF VISUALIZATION IOS PRESS 5 (3) 213 - 224 1343-8875 2002 
    The most promising next generation Image Velocimtry (IV) is the high-speed Dynamic PIV. It requires the development of innovative high-speed video camera sensors. We started by specifying the required performance of these new sensors, for measurements in air and water flows. These criteria founded on the most recent developments in PIV algorithms and incorporate results from a large questionnaire survey of users of high-speed video cameras in Japan. The results suggest that the followings are required: (1) frame rate of 1,000,000 fps, (2) pixel count of 1,000,000 pixels, (3) frame storage capacity of 100 - 200 frames for tracing a single event and 10,000 frames for turbulent measurements, (4) gray levels of 4 - 8 bits for PTV; 12 bits for observation. Finally, we reviewed the state of the art of high-speed video-image sensors. Currently the standard parallel-readout sensors can operate at 1 Kfps with a pixel count of approximately 1 Kpixels. The In-situ Storage Image Sensor (ISIS) developed by the authors has recently achieved frame rates of 1 Mfps.
  • Numerical Analyses of Coupled VOC, Heat and Mass Transport in Unsaturated Porous Medium
    三浦 俊彦; 髙野 保英; 西林 清茂; 久保; 佐藤 邦明; 福原 輝幸
    Advances in Fluid Modeling and Turbulence Measurements 859 - 866 2001/12 
    乾燥－不飽和土壌中の熱，液状水，蒸気状水および揮発性化学物質の同時連成解析モデルを提案し，実験結果との比較・検討から，その妥当性を検証した．
  • Kondo Yasushi; Etoh T. Goji; Takehara Kohsei; Takano Yasuhide; Maruno Hiromasa; Takubo Kenji; Soya Hideki
    PROCEEDINGS OF THE ITE ANNUAL CONVENTION The Institute of Image Information and Television Engineers 2001 338 - 338 1343-1846 2001 
    Development of High-Speed Video Camera that employ the ISIS, In-situ Storage Image Sensor, is reported. A test sensor of the ISIS successfully captured image at 1 million fps.
  • Y Takano; K Sato; K Nishibayashi; H Kubo; T Fukuhara
    DEVELOPMENT, PLANNING AND MANAGEMENT OF SURFACE AND GROUND WATER RESOURCES, THEME A, PROCEEDINGS TSINGHUA UNIVERSITY PRESS 450 - 456 2001 
    A mathematical model is developed to analyze heat, moisture and dense non-aqueous phase liquid (DNAPL) transport with water evaporation and DNAPL volatilization in unsaturated porous medium. The model consists of equations of mass and heat conservation in the following five components: liquid water, water vapor, DNAPL dissolved in water, DNAPL gas, and heat energy. Those coupled equations are solved numerically to simulate the time change in volumetric water content, vapor pressure, DNAPL concentration in liquid and gas phases, and temperature under given conditions. The knowledge of calculated results in this study gives evidence according to experiments as well as field experiments. Thus, it is concluded that the developed model is available for analyzing the coupled heat, moisture and DNAPL transport in unsaturated porous medium.
  • TG Etoh; K Takehara; T Okinaka; Y Takano; A Ruckelshausen; D Poggemann
    24TH INTERNATIONAL CONGRESS ON HIGH-SPEED PHOTOGRAPHY AND PHOTONICS SPIE-INT SOC OPTICAL ENGINEERING 4183 36 - 47 0277-786X 2001 
    Presented in this paper is an outline of the R and D activities on high-speed video cameras, which have been done in Kinki University since more than ten years ago, and are currently proceeded as an international cooperative project with University of Applied Sciences Osnabruck and other organizations. Extensive marketing researches have been done, (1) on user's requirements on high-speed multi-framing and video cameras by questionnaires and hearings, and (2) on current availability of the cameras of this sort by search of journals and websites. Both of them support necessity of development of a high-speed video camera of more than I million fps. A video camera of 4,500 fps with parallel readout was developed in 1991. A video camera with triple sensors was developed in 1996. The sensor is the same one as developed for the previous camera. The frame rate is 50 million fps for triple-framing and 4,500 fps for triple-light-wave framing, including color image capturing. Idea on a video camera of 1 million fps with an ISIS, In-situ Storage Image Sensor, was proposed in 1993 at first, and has been continuously improved. A test sensor was developed in early 2000, and successfully captured images at 62,500 fps. Currently, design of a prototype ISIS is going on, and, hopefully, will be fabricated in near future. Epoch-making cameras in history of development of high-speed video cameras by other persons are also briefly reviewed.
  • TAKANO Yasuhide; FUKUHARA Teruyuki
    Doboku Gakkai Ronbunshuu G Japan Society of Civil Engineers 6 213 - 218 1884-8419 1998 
    A grass growth test using a Moisture Absorbent Textile (MAT) has been carried out in the United Arab Emirates (U. A. E.) since 1996 to confirm the suitability of MAT for greening in arid regions. Meteorological data and subsurface data were collected of a grass-covered site to provide information on the differences in heat and moisture regimes for applications in an arid region. It was found that the grass growth rate and vegetation density were increased because of the improved moisture retentivity of the resulting from presence of the MAT. As an additional benefit, air temperature over the grass surface was found to be lower, while relative humidity was higher than for the bare soil surface.
    Additional tests carried out in the city of Dubai, U. A. E. to confirmed this effect.

Conference Activities & Talks

  • 高野保英; 麓隆行; 相澤春太朗; 恩田隆太郎
    土木学会全国大会第75回年次学術講演会  2020/09
  • 高野保英; 麓隆行
    土木学会全国大会第74回年次学術講演会  2019/09
  • 高野保英; Masaki Hayashi
    土木学会第72回年次学術講演会  2017/09
  • 高野保英; Masaki Hayashi
    土木学会第71回年次学術講演会  2016/09
  • 超高速ビデオカメラを用いた火花放電による電光の進行過程撮影の試み  [Not invited]
    高野保英; 竹原幸生; 江藤剛治
    可視化情報全国講演会(京都2015)  2015/10
  • 水中での自由落下球体の底面衝突により生じるキャビテーション  [Not invited]
    竹原幸生; 高野保英; 江藤剛治
    第17回応用力学シンポジウム  2014/05
  • 赤外線カメラによるカーブミラーの代替について  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 小田 和弘; 森 理至
    土木学会第61回年次学術講演会  2006/09  土木学会第61回年次学術講演会
  • 実測表面流速データと数値解析を組み合わせた3次元流速分布推定法の基礎的研究  [Not invited]
    竹原 幸生; 江藤 剛治; 髙野 保英; 中井 和樹; 中井 亮; 中山 昭彦; 久末 信幸; 中村
    土木学会第60回年次学術講演会  2005/09  土木学会第60回年次学術講演会
  • 繋留型飛行船による低層大気の環境モニタリング  [Not invited]
    中口 讓; 髙野 保英; 江藤 剛治; 坂根 輝美; 的場 幸裕
    大気環境学会年会  2004/09  大気環境学会年会
  • ローカルエリアにおける多点気象同時計測  [Not invited]
    髙野 保英; 竹原 幸生; 江藤 剛治
    土木学会第59回年次学術講演会  2004/09  土木学会第59回年次学術講演会
  • アラブ首長国連邦における散水-蒸発に伴う塩溶脱および再集積実験  [Not invited]
    何 超; 髙野 保英; 門野 浩二; 福原 輝幸
    土木学会第59回年次学術講演会  2004/09  土木学会第59回年次学術講演会
  • PTV Measurements of Flow in Porous Medea by Using Refractivity Matching  [Not invited]
    竹原 幸生; 江藤 剛治; 髙野 保英; 田中健司; 重松孝昌
    The 7th Asian Symposium on Vsualization, 2003（シンガポール）  2003/11  The 7th Asian Symposium on Vsualization, 2003（シンガポール）
     
    多孔体中の流れ場を、屈折率整合法とPTV により計測した。
  • What Comes Next to High-speed Video Cameras?  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英
    高速度撮影とフォトニクスに関する総合シンポジウム2003（盛岡）  2003/11  高速度撮影とフォトニクスに関する総合シンポジウム2003（盛岡）
     
    2001 年に開発した100 万枚／秒の超高速ビデオカメラよりはるかに性能の高い次世代超高速ビデオカメラについて講演した。シンポジウムのHigh-speed Imaging Awardの受賞に対する特別講演である。
  • 有人ヘリコプターによる実河川流れ場画像解析の応用  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 奥野 訓史
    土木学会第58回年次学術講演会  2003/09  土木学会第58回年次学術講演会
  • 緑化屋上区画からの排水水質の連続観測  [Not invited]
    髙野 保英; 江藤 剛治; 竹原 幸生
    土木学会第58回年次学術講演会  2003/09  土木学会第58回年次学術講演会
  • 土木学会第58回年次学術講演会  [Not invited]
    竹原 幸生; 江藤 剛治; 髙野 保英; 辻本 剛三; 水谷 夏樹
    2003/09
  • 捨石堰モデル内における流れ場の屈折率整合法を用いた画像計測  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 森知 宏之; 田中 健司
    土木学会第58回年次学術講演会  2003/09  土木学会第58回年次学術講演会
  • 表面張力波を用いた表面張力値測定に関する基礎的研究  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 中井 亮
    土木学会第58回年次学術講演会  2003/09  土木学会第58回年次学術講演会
  • Simultaneous Measurements of Motions of Air and Water Near Water Surface of Wind.Orient Waves  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 大塚直; 辻本剛三
    平成15年度土木学会関西支部年次学術講演会（大阪）  2003/05  平成15年度土木学会関西支部年次学術講演会（大阪）
     
    風波に起因する気体輸送に着目し、水表面を通した気体の輸送過程を解明するために水表面近傍の水流と気流をPTVにより同時画像計測を行った。その結果、気相部の渦構造を明らかにすることができた。
  • Image Velocimetry of River Flows Captured from a Helicopter  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 奥野訓史
    平成15年度土木学会関西支部年次学術講演会（大阪）  2003/05  平成15年度土木学会関西支部年次学術講演会（大阪）
     
    有人ヘリコプターを用いて実河川の表面流の画像計測結果のPTVと、ADCPによる直接流速測定を行った結果を比較検討した。
  • Image Velocimetry of Flows in Rocks by means of Reflactivity Matching  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 森知宏之; 田中健司; 道奥康治; 花谷
    平成15年度土木学会関西支部年次学術講演会（大阪）  2003/05  平成15年度土木学会関西支部年次学術講演会（大阪）
     
    比較的屈折率の低いシリコンゴムで作成したブロックを捨石堰モデルとし、近畿大学水工学研究室で開発された屈折率整合法、およびPTVを用いて、捨石堰モデル内の流れ場を可視化計測した。
  • Measurement of Surface Tension of Water Covered with Surfactants  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 中井亮
    平成15年度土木学会関西支部年次学術講演会（大阪）  2003/05  平成15年度土木学会関西支部年次学術講演会（大阪）
     
    水表面での物質輸送現象に影響を及ぼす一因である表面張力を測定する方法を提案した。
  • Development of fundamental technologies for PTV with an infrared camera  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 奥野訓史
    土木学会第57回年次学術講演会（札幌）  2002/09  土木学会第57回年次学術講演会（札幌）
     
    物体の温度を画像として表示する赤外線カメラを利用し、環境的に負荷のないトレーサーを用いて実河川にPTVを適用するための基礎技術の開発を行った。
  • An application of reflectivity matching of water and glass to flow in a porous media  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 田中健司
    土木学会第57回年次学術講演会（札幌）  2002/09  土木学会第57回年次学術講演会（札幌）
     
    当研究室で開発されたPTVアルゴリズム、屈折率整合技術により、多孔質媒体中の流れ場の画像計測を行った。
  • Simultaneous measurement of air and water flows at a wavy water surface generated by wind  [Not invited]
    竹原 幸生; 江藤 剛治; 髙野 保英; 真木正弘
    土木学会第57回年次学術講演会（札幌）  2002/09  土木学会第57回年次学術講演会（札幌）
     
    水表面を通した運動量や物質の輸送現象の解明を目的とし、水表面近傍の気体、および水の流れ場をPTV（Particle Tracking Velocometry）により同時画像計測した。
  • PTV measurement in porous medium by using the reflectivity matching method  [Not invited]
    髙野 保英; 江藤 剛治; 竹原 幸生; 田中健司; 重松孝昌
    第30回可視化情報シンポジウム（東京）  2002/07  第30回可視化情報シンポジウム（東京）
     
    透明体を用いたPTVによる流れ場計測の実用化を目的として、水中攪拌法および型枠法による真球透明体の作成方法を紹介した。また真球透明体を用いて、浮上球体周りおよび飽和多孔媒体中の流れの計測に成功した。
  • Needs of CCTV in River Management and Development of Visitors Watching System  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 玉井昌宏; 酒井信行; 綾史郎; 藤田一郎; 宮本仁志
    2002 年・河川技術に関するシンポジウム 新しい河川整備・管理の理念とそれを支援する河川技術に関するシンポジウム （東京）  2002/06  2002 年・河川技術に関するシンポジウム 新しい河川整備・管理の理念とそれを支援する河川技術に関するシンポジウム （東京）
     
    河川周辺に多数設置されているビデオカメラの有効利用に関するアンケート調査とその一環として、 河川敷の利用状況の自動計測に使う試みを示した。
  • Infrared Particle Tracking Velocimetry for Applications to Measurements of Suface Velocity Fields of Rivers  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 藤田一郎; 酒井信行; 綾史郎; 玉井昌宏; 宮本仁志; 武藤裕則
    2002年・河川技術に関するシンポジウム 新しい河川整備・管理の理念とそれを支援する河川技術に関するシンポジウム （東京）  2002/06  2002年・河川技術に関するシンポジウム 新しい河川整備・管理の理念とそれを支援する河川技術に関するシンポジウム （東京）
     
    夜間の洪水時等に河川に撒いた多数の氷を赤外線カメラを用いて自動追跡する手法である。 国土交通省のヘリコプターを実際に飛ばして頂いて実験した。
  • A fundamental study on image velocimetry of river flows with an infrared camera  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 奥野訓史
    平成 14 年度土木学会関西支部年次学術講演会 （大阪）  2002/05  平成 14 年度土木学会関西支部年次学術講演会 （大阪）
     
    夜間や水面が荒れた状況下でも、 河川の流速場が正確に計測できる手法として、 多数の氷を撒き、 それらを赤外線カメラで自動的に追跡する手法を提案した。
  • A method to make transparent spheres with the refractive index equal to that of water and its applications to hydraulic experiments  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; 田中健司
    平成 14 年度土木学会関西支部年次学術講演会 （大阪）  2002/05  平成 14 年度土木学会関西支部年次学術講演会 （大阪）
     
    低屈折率シリコンゴムで透明球体を作り、 ヨウ化ナトリウム水溶液中に入れると、 屈折率を完全に整合させることができる （n ≒ 1.4）。 これにより水中物体回りの流れを、 物体にさえぎられることなく可視化できる。
  • A CCD Image Sensor of 1Mframes/s for Continouous Image Capturing of 103 Frames  [Not invited]
    江藤 剛治; 竹原 幸生; 沖中 知雄; 髙野 保英; A. Ruckelshausen; D. Poggemann; A. Theuwissen; G. Kreider; H. O. Folkerts; 武藤秀樹; 近藤泰志; 丸野浩昌; 田窪健二; 征矢秀樹
    IEEE 2002 International Solid-State Circuits Conference （アメリカ）  2002/02  IEEE 2002 International Solid-State Circuits Conference （アメリカ）
     
    100 万枚／秒のビデオカメラ用撮像素子を新たに開発した。 IC のオリンピックと呼ばれる ISSCC で発表することができた。
  • Applications of 1,000,000 fps video camera  [Not invited]
    江藤 剛治; 竹原 幸生; 沖中 知雄; 髙野 保英; 井田 民男; 渕端 学
    高速度撮影とフォトニクスに関する合シンポジウム 2001 （福岡）  2001/12  高速度撮影とフォトニクスに関する合シンポジウム 2001 （福岡）
     
    新開発した 100 万枚／秒のビデオカメラをいくつかの科学技術計測に適用し、 その有用性と課題を明らかにした。
  • High-speed image capturing for PIV  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英
    4th International Symposium on Particle Image Velocimetry（ゲッチンゲン）  2001/11  4th International Symposium on Particle Image Velocimetry（ゲッチンゲン）
     
    流れ計測に適した高速ビデオカメラについて、 流体学的見地から必要な性能を明らかにした。 またこのようなカメラの開発の歴史、 最新の成果、 今後の動向を紹介した。 なお本発表は、 日本代表のキーノート講演である。
  • Development of ultra-high-speed video cameras for PIV  [Not invited]
    江藤 剛治; 竹原 幸生; 髙野 保英; ディルク・ポゲマン 他; 武藤秀樹; グレッグ・クライダー; 近藤泰志
    4th International Symposium on Particle Image Velocimetry（ゲッチンゲン）  2001/11  4th International Symposium on Particle Image Velocimetry（ゲッチンゲン）
     
    新開発の 100 万枚／秒のビデオカメラの基本設計と撮影例を紹介した。 このカメラは近畿大学を中心とした、 日独蘭 3ヶ国の 5 組織で構成する国際プロジェクトで開発された。

MISC

Research Grants & Projects

  • 日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2022/04 -2025/03 
    Author : 高野 保英
  • 日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2015/04 -2017/03 
    Author : 高野 保英
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2008 -2010 
    Author : TAKEHARA Kohsei; ETOH Takeharu; SUZUKI Naoya; TAKANO Yasuhide; MORI Nobuhito; MIZUTANI Natsuki; THORODDSEN Sigurdur T.
     
    In order to understand the mechanism of gas-transfer at wind waves with whitecaps, a PTV measurement technique was developed to measure flow fields under wind wave. The measurement technique was applied to flow field under white-cap which occurred by wind wave braking. The properties of air flows over wind waves and bubbles which generated by wave breaking were also measured by image processing techniques. In addition, global CO_2 exchange between air-sea by breaking waves was estimated by the field measurement data and satellite data.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2003 -2005 
    Author : TAKEHARA Kohsei; ETOH Takeharu; TAKANO Yasuhide
     
    Gas transfer at sea surfaces is strongly dominated by disturbances close to the surface. White cap, which appear on the ocean surfaces when wind waves are breaking, is one of the most important processes in the gas transfer mechanisms. In the white caps, many bubbles are entrained into sea water and some of them are lifted up to surface. The bubbles at sea surfaces eventually burst and generate many small droplets. Similarly, some of the droplet fall down to sea surface again. This bubble-droplet chain process was experimentally investigated in this research. A high-speed video camera, of which frame rate is 1,000,000 fps, was developed at Kinki University in 2001. The high-speed video camera is a powerful tool for investigation of the gas transfer at sea surface. In this research, this high-speed video camera was applied to visualization of the fundamental processes of the bubble-droplets chain process. The following processes are picked up as the fundamental processes. (1)Air entrapment under an impacting drop (2)Coalescence speed of two drops (3)Coalescence speed of two bubbles (4)Crown-breakup by the formation of Marangoni holes And also the simultaneous plane measurement techniques of air and water flows close to wind wave interfaces was developed by using a Particle Tracking Velocimetry, which was developed at Kinki University.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2002 -2004 
    Author : ETOH Takeharu; TAKEHARA Kohsei; NAKAGUCHI Yuzuru; KAJII Hironobou; TAKANO Yasuhide
     
    A.Development of Application Technologies of PTV to Natural Water Bodies (1)An efficient technology was developed to detect tracer particles for PTV on surfaces of natural water bodies, such as rivers, lakes, etc. The tracers can be separated by a combination of discriminant analysis of color images and duration analysis, which removes candidates of tracer particle images disappearing within two seconds. (2)The technology was applied to measurement of the surface flow field of Yodo river, etc. The flow field was also measured with ADCP (Acoustic Doppler Current Profiler) carried by a boat. The results nicely agreed with each other. (3)A technique for simultaneous measurement of wave and flow under wind waves was developed. (4)In parallel, seasonal variations of chemical components in Yodo river were measured, especially on Nitrogen and Phosphor. B.Development of Air Samplers Carried along a Tether of a Balloon and/or a Kite (1)Air samplers attached to a tether of a balloon was developed. Several samplers can be attached to a tether to collect air samples at various heights. (2)In a weak-wind condition, the samplers were tested. A dust dome was detected as expected, which showed the maximum concentration of dusts at about 50m from the ground, and less concentration at the ground and at 100m. The dust dome was also visualized by a camera mounted on the balloon. C.Relevant Research Contributions An infrared video camera was introduced by the financial support of this project. The camera was applied to other researches relating to infrared image analyses, resulting in the following contributions : (1)Application of infrared video cameras to reduce traffic accidents at the corners and intersections of roads in night. (2)Applications to various research projects on temperature environment around human bodies.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2002 -2003 
    Author : SATO Kuniaki; TAKANO Yasuhide; WADA Akira; ASAEDA Takashi; SASAKI Takashi
     
    1.Objective of the study Groundwater pollution by chlorinated hydrocarbons, such as trichloroethylene (TCE) causes a serious environmental problem because of their carcinogenic characteristics. Behaviors of leaked pollutant or diffusive material can be dealt with transport processes in porous media, consisting of two parts, volatile gases migration in unsaturated zone and liquids phase convective dispersion in aquifer. The objective of the study is to model the pollution migration in soil and groundwater and to apply it to practical field sites based on a pollution migration scheme, by Dr. Takano and a coupled soil and lower atmosphere linked model (SALSA : Soil Atmosphere Linking Simulation Algorithm). The investigation is carried out by next four steps, i)modeling of pollution migration in soil accounting for transport processes on momentum, heat and mass in atmosphere, ii)introduction of the boundary conditions at a surface, iii)coupling of the pollution migration model in soil and aquifer, iv)parameter sensitivity analysis and application for field site. 2)Results of the study Prof. Sato, Prof. Wada and Prof. Asaeda carried out numerical simulations using the VOC migration model in shallow unsaturated layer. The results gave that soil moisture and temperature play significant role in the migration, and rainfall enhances the downward transport of pollutant. Dr. Takano investigated the evapotranspiration rate and drainage water quality through meteorological and hydrological observations on the rooftop of a building at Kinki University. Prof. Sato, Prof. Asaeda and Mr. Sasaki made a basic mathematical model of VOC transport in saturated porous media by laboratory experiments in uniformly packed glass beads. A new migration model in aquifer has been developed to predict pollutant behavior in saturated and unsaturated porous media, and application for investigated field site by Prof. Sato, Prof. Asaeda, Prof. Wada and Mr. Sasaki.
  • 日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2001 -2002 
    Author : 高野 保英
     
    土壌圏・地下水圏は,自然環境における窒素・炭素・酸素などの循環の要になっており,その分解・生成課程において微生物が大きな役割を果たす.また,汚染土壌・地下水の浄化にも,微生物の物質分解機能の利用が図られている.しかしながら,土壌・地下水環境,微生物種,物質は多種多様であり,微生物数やその活性は,土壌構成成分,間隙構造,土壌空気成分,温度,水分量などにより異なる.従って,土壌・地下水中における物質循環の定量的に評価するためには,環境条件と微生物数との関係を把握する必要がある. そこで本研究では,物質分解機能を有する微生物の培養を試み,種々の土壌あるいは環境条件下における微生物の活性と分解機能の関係を,室内実験により調べることを目的とする. 本年度においては,昨年度に引き続き,研究代表者が所属する研究機関建物屋上に設置された緑化土壌および敷地内の植生を有する土壌を対象とし,不飽和土壌の温度および水分量の変化に伴うバイオマス量の変化特性を調べるための予備的な試験として,以下の実験を行った. 1.屋上緑化区域の土壌および植生を有する土壌を採取した後,カラムに詰め,温度および湿度を一定に保った恒温恒湿器内に設置する. 2.一定期間放置後,土壌バイオマスをクロロホルム燻蒸法により測定する. 昨年度の研究成果を鑑みて,本年度は特に培養・測定技術の精度向上に努めたが,環境および土壌条件の違いによる土壌バイオマス量の有意な違いを確認するに至らなかった.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2000 -2002 
    Author : FUKUHARA Teruyui; NAGAI Nirou; NODA Hideki; OHKI Shizuka; TAKANO Yasuhide
     
    The present project was carried out at Hamuraniyah Experimental farm, Ras Al Khaimah emirate in the United Arab Emirates from 1999 for three years. The contents consist of following three researches and one scientific seminar. 1. Production Performance Test of Basin-type Solar Still The temperature and humidity of humid air in a basin, saline water temperature and roof temperature were measured in addition to the production-rate of distilled water, as well and the meteorological survey. A new model in consideration of heat transfer of the humid air was developed by our research group and it was seen that the new model can estimate the production rate with sufficient accuracy. 2. Soil-Moisture Retention Improvement Soil-Moisture retention was improved with rice bran and peat moss. Irrigation water in the soil-improvement plot could be reduced to one third of that in a control plot in "Komatsuna" cultivation test. As for tomato cultivation test, the reduction rate of irrigation water was 87% but the reduction of irrigation water increased the crop ratio of full ripeness fruit. 3. Estimation of Evaporation Rate during Post-Irrigation Measurement of evaporation flux and heat and moisture transfer monitoring in soil under bare surface were performed in order to better understand post-irrigation drying phenomena. The evaporation flux was directly measured with a new type of evaporation pan. It was concluded that the proposed evaporation model is adequate to evaluate the water budget of post-irrigation in arid regions. 4. Scientific seminar of research achievement A scientific seminar was held in Ras Al Khaimah Hilton hotel on November 11, 2002 and 50 participants were joined an active opinion exchange after our presentations. Congratulatory addresses were delivered by the following honorable guests, previous deputy minister of the Ministry of Agriculture and Fisheries of UAE, Mr.Mutawa, Japanese ambassador of UAE, Mr.Fujioka , Chief official of consulate general of Japan, Mr.Arakawa and President of Ittihad University, H.H.Sultan Bin Kayed Al Qassimi.
  • 乾燥地における節水栽培の実証研究
    Date (from‐to) : 1996 -2000

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