Search Results 1-20 of 249

  • Ion‐Neutral Collision Frequencies for Calculating Ionospheric Conductivity

    Ieda A.

    ファイル公開:2020-08-01

    Journal of Geophysical Research: Space Physics 125(2), e2019JA027128, 2020-02

    IR 

  • Flying tracks, flight altitude and directions of movement of nocturnal migrant birds, as shown by marine radar  [in Japanese]

    TAGO Kazumi , TAKAHASHI Hiroaki , HAGIWARA Yojiro , MASUKO Osamu , YOKOYAMA Yoko , KONDO Hiroaki , ARIYAMA Yoshiaki , HIGUCHI Hiroyoshi

    <p>渡り鳥の多くは夜間に渡りを行っていることが知られている.しかし,夜間における渡りの動向を調査する方法は限られているため,日本ではその実態はほとんどわかっていない.そこで,北海道から九州の140地点で船舶レーダーを用いた夜間の渡り鳥の調査を実施した.レーダー調査では種の同定はできないものの,夜間でも鳥類の飛跡数を定量的に調査でき,飛翔高度等が把握できるという利点がある.調査は各地点 …

    Japanese Journal of Ornithology 69(1), 41-61, 2020

    J-STAGE 

  • Flora of Sugashima Island and influence of the expansion of the quarry to the flora  [in Japanese]

    福田 知子 , 山脇 和也 , 板谷 明美 , FUKUDA Tomoko , YAMAWAKI Kazuya , ITAYA Akemi

    菅島は鳥羽市から数km の所に位置する島である。島の特徴は島の最高峰である大山(標高238m)を含む南西部に広がる蛇紋岩地帯であり、そこではヤマジソ・シマジタムラソウのような蛇紋岩地によく見られる種や、矮性化した植物が観察できる。2017 年9 月15-16 日、日本植物分類学会の野外研修会が菅島で開催され、総勢19 名が植物の確認を行った。本資料では、これまでの記録に今回の研修会における記録を追 …

    三重大学教養教育機構研究紀要 = BULLETIN OF THE COLLEGE OF LIBERAL ARTS AND SCIENCES MIE UNIVERSITY (3), 35-49, 2018-03-30

    IR 

  • Aerodynamic Heating of Inflatable Aeroshell in Orbital Reentry  [in Japanese]

    TAKAHASHI Yusuke , KOIKE Taiki , OSHIMA Nobuyuki

    … <p>Aerodynamic heating of an inflatable reentry vehicle, TITANS, which is one of the innovative reentry technologies, was investigated using a tightly coupled approach involving computational fluid dynamics and structure analysis. … It was indicated that thermochemically nonequilibrium flow appears for a case of the peak heating altitude in the trajectory of mission. …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), J1920201, 2018

    J-STAGE 

  • The Wearable Device for Acute Mountain Sickness by Using SpO2 measurement

    Chi Liu Chun , Huang Shiannfong , Cheng Yang Jia , Lin Tsung-Ching , Huang Lin-Wen , Han Kao Bo , Wei Kuo Chun

    … <p>With the advancement of science and technology, humans can reach the peak within a short period of time by means of transport. … However, the rapid rise to an extremely high altitude in a short time will lead to Acute Mountain Sickness. …

    Transactions of Japanese Society for Medical and Biological Engineering Annual56(Proc), 49-50, 2018

    J-STAGE 

  • The Wearable Device for Acute Mountain Sickness by Using SpO2 measurement

    Liu Chun Chi , Huang Shiannfong , Yang Jia Cheng , Lin Tsung-Ching , Huang Lin-Wen , Kao Bo Han , Kuo Chun Wei

    … <p>With the advancement of science and technology, humans can reach the peak within a short period of time by means of transport. … However, the rapid rise to an extremely high altitude in a short time will lead to Acute Mountain Sickness. …

    Transactions of Japanese Society for Medical and Biological Engineering Annual56(Abstract), S354-S354, 2018

    J-STAGE 

  • Aerothermodynamic Studies on Low-Ballistic-Coefficient Mars Aerocapture Vehicle with Drag Modulation and Electric Propulsion

    SUZUKI Kojiro

    … To obtain the appropriate amount of deceleration at the atmospheric pass, the drag modulation technique, in which the aeroshell is timely jettisoned from the spacecraft, was assumed. … Finally the corridor width for the entry path angle was estimated considering the ability of the orbit insertion, the peak aerodynamic heating, and the capability of the electric propulsion to raise the periapsis altitude. …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN 16(5), 412-419, 2018

    J-STAGE 

  • Visit to the China Qinghai Duoba National Highland Sports Training Base

    CAO Yinhang , Yinhang CAO , Fuhai MA , Naoto FUJII , Takeshi NISHIYASU

    … The Human High Performance doctoral degree program at the University of Tsukuba was established in 2015, and I (Cao Yinhang) am one of the first students in this program. … For my doctoral thesis, I have been working on a project aimed at elucidating the factors that determine individual variation in the hypoxia-induced reduction in peak oxygen uptake among endurance athletes during high-altitude exposure. …

    筑波大学体育系紀要 = The bulletin of Faculty of Health and Sport Sciences 41, 37-40, 2018

    IR 

  • Sixteen year variation of horizontal phase velocity and propagation direction of mesospheric and thermospheric waves in airglow images at Shigaraki, Japan

    Takeo D. , Shiokawa K. , Fujinami H. , Otsuka Y. , Matsuda TS. , Ejiri MK. , Nakamura T. , Yamamoto M.

    … We analyzed the horizontal phase velocity of gravity waves and medium-scale traveling ionospheric disturbances (MSTIDs) by using the three-dimensional fast Fourier transform method developed by Matsuda et al. … (2014) for 557.7 nm (altitude: 90–100 km) and 630.0 nm (altitude: 200–300 km) airglow images obtained at Shigaraki MU Observatory (34.8°N, 136.1°E, dip angle: 49°) over ∼16 years from 16 March 1999 to 20 February 2015. …

    Journal of Geophysical Research-Space Physics 122(8), 8770-8780, 2017-08

    IR 

  • Spire-like Peaks at Bergersen in the Sor Rondane Mountains, East Antarctica  [in Japanese]

    <p> 第53次南極地域観測隊(2011~2012年)での調査時に撮影したものである.これらの尖塔群はおもに片麻岩とそれに貫入した花崗岩からなり,中央の尖塔の標高は2,401 mで氷床表面からの比高は約1,000 mに達する.この絶景は氷河による侵食や差別的な風化によって形成されたと考えられる.手前には広大なモレーン帯が広がっており,これらが形成された年代を調べることで,過去の東南極氷 …

    Journal of Geography (Chigaku Zasshi) 126(1), Cover01_01-Cover01_02, 2017

    J-STAGE 

  • PRECIPITATION PREDICTION OF LOCAL HEAVY RAINFALLS BY USING REFLECTION INTENSITY OF PHASED-ARRAY-WEATHER-RADER  [in Japanese]

    satou kouichi , Hashimoto Ken , Kouichi Matsuda , Ushio Tomoo

    近年,局地的豪雨により甚大な被害が発生している.このため豪雨が発生する地域と強度をできるだけ早くかつ精度よく予測し,危険度情報として提供することが求められている.本論文では,大阪大学に設置されているフェーズドアレイ気象レーダ(以下,PAWRデータと表記)の反射強度観測値(Z)を用いてXRAIN(R)と高度,先行時間を考慮した関係把握を行った.次に,関係把握の結果を踏まえZR式による降水量予測手法に …

    Proceeding of Annual Conference 30(0), 21, 2017

    J-STAGE 

  • CONSIDERATION OF GROUND AMPLIFICATION FACTOR OF THE MOUNTAIN TERRAIN BASED ON THE EARTHQUAKE OBSERVATION  [in Japanese]

    FUJINAMI Yusei , YOSHIMI Masayuki , SAKAI Hisakazu , SATO Kiyotaka , IKEDA Yuji

    各自治体などの被害想定において,地形分類を考慮した簡易な地震動強度分布の推定が行われているが,これまでの強震動予測手法は社会資本や人口の密集した都市部を中心に精度向上が図られており,必ずしも山間部の予測精度は十分ではない.特に山間部における斜面崩壊による被害を減らすためには,山岳地形における強震分布の推定精度の向上が求められる.本研究では,横須賀の小山(標高約55m)を対象として地中部(地下抗)を …

    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 73(4), I_907-I_913, 2017

    J-STAGE 

  • THE RELATION BETWEEN SITUATION OF LAND COVER AND REGIONAL MICROCLIMATE IN WEATHER OBSERVATION POINT:-The extraction the degree of influence of land use change-  [in Japanese]

    YAMAZAKI Katsuhiro , TAKAGI Naoki

    … One of the main causes is the change in land cover especially the loss of natural cover such as green spaces and water bodies and increase of artificial land cover such as buildings and asphalt coverage.<br> In this study, we aimed to extract the degree of influence of the heat island phenomenon on the air temperature by analyzing the change in land cover and climate over the past 30 years across Japan. …

    Journal of Environmental Engineering (Transactions of AIJ) 81(730), 1147-1154, 2016

    J-STAGE 

  • BIAS CORRECTION METHOD FOR SOLAR RADIATION BASED ON QUANTILE MAPPING TO PROVIDE WEATHER DATA FOR BUILDING ENERGY SIMULATIONS  [in Japanese]

    ARIMA Yusuke , OOKA Ryozo , KIKUMOTO Hideki

    …  The outputs of weather and climate models have been used in various application fields. … However, as the model output has systematical errors (called the bias), some type of bias correction is necessary in order to use the model output for an application field. …

    Journal of Environmental Engineering (Transactions of AIJ) 81(729), 1047-1054, 2016

    J-STAGE 

  • Spatial and Temporal Distribution of the Pre-Seismic Ionospheric Anomaly Prior to the 2011 Off the Pacific Coast of Tohoku Earthquake (Mw9.0)  [in Japanese]

    Hirooka Shinji , Ichikawa Takashi , Hattori Katsumi , Han Peng , Yoshino Chie , Liu Jann-Yeng

    … In this paper, Total Electron Content (TEC) and tomography analyses have been applied to investigate the spatial and temporal distributions of ionospheric electron density prior to the 2011 Off the Pacific Coast of Tohoku earthquake (Mw9.0). …

    IEEJ Transactions on Fundamentals and Materials 136(5), 265-271, 2016

    J-STAGE 

  • Radiative characteristics of the Chelyabinsk superbolide

    Masahisa Yanagisawa

    … On Feb. 15, 2013, a meteoroid with a size of about 19 m plunged into the terrestrial atmosphere at 19 km s-1 and burst at an altitude of about 30 km over the city of Chelyabinsk, Russia. … Here we present light curves for the bolide in the red, green, and blue color bands, derived from an analysis of a video that was recorded by a dashboard camera and released on the Internet. …

    Planetary and Space Science (118), 79-89, 2015-12-01

    IR 

  • Mountains in Tibet and Nepal which I Climbed in My Sixties and Seventies : Centering on Examples of My Failures and Lessons  [in Japanese]

    南井 英弘

    特集4: 雲南懇話会からの寄稿 = Special Issue 4: Contribution from the Yunnan Forum60年前の1955年、山岳部の新人だった。暁の星を見ながら米を洗い、薪をくべ煙にむせびながら食事当番をしていた。そんな時、戦前の英国ヒマラヤ遠征隊の報告書を読んで驚いた。「Good morning, Sahib, Hot tea, Sir」と言ってキッチン・ボー …

    ヒマラヤ学誌 : Himalayan Study Monographs (16), 213-223, 2015-03-28

    IR  DOI 

  • Possibility of Reduction in Aerodynamic Heating by MHD Parachute Effect in Super Orbital Reenty Flights  [in Japanese]

    下澤 雄太 , 益田 克己 , 藤野 貴康 , Shimosawa Yuta , Masuda Katsumi , Fujino Takayasu

    第46回流体力学講演会/第32回航空宇宙数値シミュレーション技術シンポジウム (2014年7月3日-4日. 弘前文化センター), 弘前市, 青森県形態: カラー図版あり資料番号: AA1530023005

    宇宙航空研究開発機構特別資料: 第46回流体力学講演会/第32回航空宇宙数値シミュレーション技術シンポジウム論文集 = JAXA Special Publication: Proceedings of the 46th Fluid Dynamics Conference / 32nd Aerospace Numerical Simulation Symposium (JAXA-SP-14-010), 23-28, 2015-03-25

    IR 

  • Evaluation of snow equivalent using corrected short wave radiation considering slope direction  [in Japanese]

    Namura Ruka

    本研究の対象河川は上流部を山岳氷河に位置しており,雪解け水や氷河の融解による水が主な水源となっている.しかし,これまで陸面過程モデルSiBUCではこの氷河の融解過程を正しく再現できておらず,中央アジアでは夏期に見られる流出のピークが解析値では3カ月程早くに見られる問題がある.先行研究では長波放射を標高依存による補正を行うことでこの問題の解決を試みたが,1カ月程ピークの時期を遅らす結果にとどまった. …

    Proceeding of Annual Conference 28(0), 100028, 2015

    J-STAGE 

  • Full-Field Simulation for Sonic Boom Cutoff Phenomena

    YAMASHITA Rei , SUZUKI Kojiro

    … This study describes an application of full-field, direct simulation in the entire domain involving the near-field around an aircraft, the far-field toward the ground, and the caustic region as an approach to investigate sonic boom cutoff phenomena. … A flow field around an axi-symmetric paraboloid has been analyzed by solving three-dimensional (3D) Euler equations with a gravity term for considering atmospheric stratification with altitude. …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 58(6), 327-336, 2015

    J-STAGE 

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