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OKAYASU Akio
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Research Areas 【 display / non-display 】
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Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Hydroengineering
Papers 【 display / non-display 】
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SEMI-AUTOMATIC GERERATION OF SHORELINE LOCATION DATA FOR MACHINE LEARNING USING UAV IMAGES
OSAWA Tomoya, WU Lianhui, INAZU Daisuke, SUZUKI Tatsuki, ONO Soraya, SASAKI Nobukazu, IKEYA Tsuyoshi, OKAYASU Akio , 2023
Japanese Journal of JSCE
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A Study on Evacuation Measures and Reallocation of Shelters against Concurrence of Storm Surge and Flood Disaster in Coastal Area
KO Hyo-Seong, OKAYASU Akio, IKEYA Tsuyoshi, INAZU Daisuke , 2022.11
Journal of Social Safety Science
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METHOD FOR REMOVING THE EFFECT OF REFRACTION ON THE WATER SURFACE IN AERIAL PHOTOGRAPHY OF UNDERWATER STRUCTURES BY GEOMETRIC TRANSFORMATION OF IMAGES.
MOCHIZUKI Wataru, IKEYA Tsuyoshi, WU Lianhui, INAZU Daisuke, OKAYASU Akio , 2022
Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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EVALUATION OF ACCESSIBILITY TO OFFSHORE WIND TURBINES BY CREW TRANSFER VESSELS USING ARTIFICIAL NEURAL NETWORK
WU Lianhui, IKEYA Tsuyoshi, INAZU Daisuke, OKAYASU Akio, FUKUMOTO Yukinari, SATO Koya , 2022
Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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SHORELINE CHANGE ANALYSIS AT TANINTHARYI, MYANMAR BY LAND-WATER BOUNDARY DETECTION ON SATELLITE IMAGES
Mya MYO MYINT NWE, WU Lianhui, IKEYA Tsuyoshi, OKAYASU Akio , 2022
Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
Books 【 display / non-display 】
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Computational Wave Dynamics
H. Gotoh, A. Okayasu and Y. Watanabe , 2013.09
World Scientific , Preface, Chapter 1, Chapter 2, Chapter 9 , 0-0
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数値波動水槽-砕波波浪計算の深化と耐波設計の革新を目指して-
編者:土木学会海岸工学委員会数値波動水槽研究小委員会編、編集代表:後藤仁志、岡安章夫、分担執筆:後藤仁志、岡安章夫、平石哲也、川崎浩司、渡部靖憲、重松孝昌、森信人、原田英治、荒木進歩、伊藤一教ほか , 2012.10
土木学会 , 序文,第Ⅰ編第1章,第2章2.3,第10章10.1,第Ⅱ編第1章, , 0-0
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水理公式集 例題プログラム集[平成13年版]28
岡安章夫 , 2002.01
土木学会 , 第5編例題5実用-3「波向線法」 , 0-28
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漂砂環境の創造に向けて
編者、土木学会海岸工学委員会研究現況レビュー小委員会編、編集代表:河田恵昭、柴山知也、分担執筆:田中仁、岡安章夫、清水琢三、佐藤愼司、浅野敏之、辻本剛三、伊福誠、加藤一正、山下隆男ほか , 1998.10
土木学会 , 第Ⅰ編第2章(pp.31-44)、第Ⅲ編第1章1.5(pp.204-216) , 0-0
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Project Period (FY): 2023/04 - 2027/03 Investigator(s): 岡安 章夫
Grant-in-Aid for Scientific Research(A) Principal Investigator 23H00215
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Design and social implementation of integrated mitigation system for tsunami disasters
Project Period (FY): 2017/04 - 2020/03 Investigator(s): Okayasu Akio
Grant-in-Aid for Scientific Research(A) Principal Investigator 17H01293
The purpose of this research is to propose a comprehensive disaster prevention and mitigation policy by performing benefit evaluation that takes into account the long-term changes in the local economy and society associated with the measures as well as the direct risk reduction measures such as coastal seawalls/dykes and town relocation. A review of the concept of examination of seawall height, quantification of the relationship between tsunami scale and occurrence frequency, probabilistic estimation method of storm surge, inundation depth estimation by flood simulation, evaluation of resilience of protective facilities, quantification of the effects of hard and soft measures, social implementation issues in the decision process of measures, economic evaluation, externality evaluation, etc. were examined with case studies. The results are being compiled as "Technical Guidelines for Coastal Conservation Facility Development Plan against Tsunami".
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Lifting technology by carrier circulation system for development of submarine mineral resources
Project Period (FY): 2017/04 - 2020/03 Investigator(s): Tani Kazuo
Grant-in-Aid for Scientific Research(A) Co-Investigator 17H01355
As an efficient lifting technology for mineral resources on the seabed, we proposed a carrier material circulation method and conducted the relevant feasibility study. Small-scale model tests of ore lifting and a series of settling and pulling experiments of an ore model in a cylindrical container were conducted. In these experiments, a new measurement method using an RFID (Radio Frequency IDentifyer) system was developed for observing the movements of an ore model in a riser pipe. Then, a theoretical model was proposed to estimate the ore retention performance of the carrier materials based on their rheorogical characteristics. We also attempted to develop a numerical simulator using a particle-based method to elucidate the transport mechanism.
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砕波・遡上帯での高濃度底質移動フラックス計測と統合漂砂モデルの開発
Project Period (FY): 2014/04 - 2017/03
Grant-in-Aid for Scientific Research(B) Principal Investigator 26289161
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乱流特性を考慮した底質pickup関数の提案と統一漂砂量モデルの構築
Project Period (FY): 2009/04 - 2012/03
Grant-in-Aid for Scientific Research(C) Principal Investigator 21560534
Lesson Subject 【 display / non-display 】
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Lesson Subject(Undergraduate)
Fundamental Engineering Ⅱ
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Lesson Subject(Graduate School)
Coastal Protection and Management
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Special Seminar in Marine Resources and Energy
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Research in Marine Resources and Energy
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Advanced Research in Ocean Science and Technology
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Case Workshop on Marine Environmental Protection