Shinji Hirooka

J-GLOBAL         Last updated: Feb 7, 2019 at 13:48
 
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Name
Shinji Hirooka
E-mail
shin.hirookagmail.com
Affiliation
Chiba University

Research Areas

 
 

Academic & Professional Experience

 
May 2017
 - 
Today
Senior researcher, R&D Center, Hmcomm Co. Ltd.
 

Published Papers

 
Hirooka Shinji, Hattori Katsumi
IEEJ Transactions on Fundamentals and Materials   135(2) 117-123   Jan 2015   [Refereed]
A numerical simulation has been done to evaluate the performance of the ionospheric tomography using the residual minimization training neural network (RMTNN) method. The results indicated that reconstruction with high-precision is possible when t...

Misc

 
韓 鵬, 服部 克巳, 山口 拓人, 廣岡 伸治, 吉野 千恵
電気学会論文誌. A, 基礎・材料・共通部門誌 = IEEJ transactions on fundamentals and materials   137(2) 119-127   Feb 2017   [Refereed]
Han Peng, 服部克巳, 山口拓人, 廣岡伸治, 吉野千恵
電気学会論文誌 A   137(2) 119‐127(J‐STAGE)-127   Jan 2017   [Refereed]
© 2017 The Institute of Electrical Engineers of Japan. Recent studies have reported unusual behaviors of geomagnetic diurnal variation (GDV) in the vertical component prior to the 2011 off the Pacific coast of Tohoku earthquake (Mw 9.0). To make a...
廣岡伸治, 服部克巳, YAGMUR Mustafa, 劉正彦
大気電気学会誌   10(1) 90‐91   Apr 2016   [Refereed]
Peng Han, Peng Han, Katsumi Hattori, Katsumi Hattori, Qinghua Huang, Shinji Hirooka, Chie Yoshino
Journal of Asian Earth Sciences   129 21-21   Nov 2016   [Refereed]
© 2016Xu et al. (2013) and Han et al. (2015) have reported unusual behaviors of geomagnetic diurnal variation (GDV) in the vertical component prior to the 2011 off the Pacific coast of Tohoku earthquake (Mw 9.0). To make a better understanding of ...
廣岡伸治, 服部克巳, LIU Jann‐Yenq
J Atmos Electr   36(1) 1-11   Mar 2016   [Refereed]
YAGMUR Mustafa, HIROOKA Shinji, HATTORI Katsumi
大気電気学会誌   10(1) 63‐64   Apr 2016
Shinji Hirooka, Takashi Ichikawa, Katsumi Hattori, Peng Han, Chie Yoshino, Jann Yeng Liu
IEEJ Transactions on Fundamentals and Materials   136(5) 265-271   Jan 2016   [Refereed]
© 2016 The Institute of Electrical Engineers of Japan.The ionospheric anomalies possibly associated with large earthquakes have been reported by many researchers. In this paper. Total Electron Content (TEC) and tomography analyses have been applie...
Shinji Hirooka, Shinji Hirooka, Katsumi Hattori
Electronics and Communications in Japan   99(4) 50-57   Apr 2016   [Refereed]
© 2016 Wiley Periodicals, Inc.A numerical simulation has been performed to evaluate the performance of ionospheric tomography using the residual minimization training neural network (RMTNN) method. The results indicate that reconstruction with hig...
廣木暁充, 服部克巳, 廣岡伸治
大気電気学会誌   9(1) 33-34   Apr 2015
廣岡伸治, 服部克巳
電気学会基礎・材料・共通部門大会講演論文集(CD-ROM)   2014 ROMBUNNO.21-A-A2-1   Aug 2014
廣岡伸治, 市川卓, 服部克巳, Han Peng, 吉野千恵, Liu Jann-Yeng
電気学会論文誌 A   136(5) 265‐271(J‐STAGE)-271   Jan 2016   [Refereed]
© 2016 The Institute of Electrical Engineers of Japan. The ionospheric anomalies possibly associated with large earthquakes have been reported by many researchers. In this paper. Total Electron Content (TEC) and tomography analyses have been appli...
嶋村重治, 円尾晃一, 吉川栄一, 吉田智, 牛尾知雄, 河崎善一郎, 又吉直樹, 飯島朋子, 楠研一, 高柳裕次, 秋田学, 中村佳敬, 北出直哉, 森本健志, 菊池博史, 鈴木智幸, 早川正士, 道本光一郎, HAN Peng, FEBTY Febriani, 廣岡伸治, 服部克巳, 市川卓, 竹田辰興, 西橋政秀, 紺晋平, 大野望, 刀根優花, 山本勲, 島倉信, 鷹野敏明, 井筒潤, 永田悟, 和田忠幸, 清水雅仁, 太田健次, 植竹富一, 芳原容英, 高野忠
電気学会技術報告   (1315) 96P   Aug 2014   [Refereed]
服部克巳, HAN Peng, 廣岡伸治
日本地球惑星科学連合大会予稿集(Web)   2016 ROMBUNNO.MIS08‐02 (WEB ONLY)   2016
廣木暁充, 服部克巳, 廣岡伸治
日本地球惑星科学連合大会予稿集(Web)   2015 ROMBUNNO.MIS29‐20 (WEB ONLY)   2015
廣岡伸治, 服部克巳, 市川卓
大気電気学会誌   8(1) 59-60   Apr 2014
廣木暁充, 服部克巳, 廣岡伸治
大気電気学会誌   8(1) 126-127   Apr 2014
服部克巳, 韓鵬, 廣岡伸治, 吉野千恵
大気電気学会誌   7(2) 68-69   Oct 2013
Shinji Hirooka, Katsumi Hattori, Masahide Nishihashi, Shinpei Kon, Tatsuoki Takeda
Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)   181(4) 9-18   Dec 2012   [Refereed]
An ionospheric anomaly prior to the 2007 Southern Sumatra earthquake (M8.5) was observed by GPS receivers around the Sumatra islands. In this paper, to investigate the three-dimensional structure of electron density in the ionosphere, a tomographi...
HATTORI Katsumi, HONMA Ayano, HIROOKA Shinji, HAN Peng
Program and Abstracts. International Symposium on GNSS 2015   111   2015
HATTORI Katsumi, HIROOKA Shinji, ICHIKAWA Takashi
極域科学シンポジウム講演予稿集(CD-ROM)   4th ROMBUNNO.OS,HATTORIKATSUMI,1   2013
Shinji Hirooka, Katsumi Hattori, Masahide Nishihashi, Shinpei Kon, Tatsuoki Takeda
IEEJ Transactions on Fundamentals and Materials   131(9) 691-697   Dec 2011   [Refereed]
The ionospheric anomaly prior to the 2007 SouthernSumatra earthquake (M8.5) was observed by GPS receivers around Sumatra islands. In this paper, to investigate the three-dimensional structure of electron density in Ionosphere, a tomographic approa...
HATTORI Katsumi, HIROOKA Shinji, YOSHINO Chie, OTSUKA Yuichi
Proc CEReS Int Symp Remote Sens   20th 26   2013
Shinji Hirooka, Katsumi Hattori, Tatsuoki Takeda
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011      Nov 2011   [Refereed]
In order to investigate the dynamics of ionospheric phenomena, perform the 3-D ionospheric tomography is effective. However, it is the ill-posed inverse problem and reconstruction is difficult because of the small number of data. The Residual Mini...
Shinji Hirooka, Katsumi Hattori, Masahide Nishihashi, Tatsuoki Takeda
2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011      Nov 2011   [Refereed]
In this paper, neural network based ionospheric tomography was performed to investigate the detailed structure that may be associated with earthquakes. The 2007 Southern Sumatra earthquake (M8.5) is selected because significant decreases in the To...
HATTORI Katsumi, ICHIKAWA Takashi, HIROOKA Shinji, TAKEDA Tatsuoki, RYU Masahiko
CEReS環境リモートセンシングシンポジウム資料集   14th 58   2012
S. Hirooka, K. Hattori, T. Takeda
Radio Science   46(5)    Nov 2011   [Refereed]
Three-dimensional ionospheric tomography is effective for investigations of the dynamics of ionospheric phenomena. However, it is an ill-posed problem in the context of sparse data, and accurate electron density reconstruction is difficult. The Re...
S. Hirooka, K. Hattori, M. Nishihashi, T. Takeda
Natural Hazards and Earth System Science   11(8) 2341-2353   Sep 2011   [Refereed]
A tomographic approach is used to investigate the fine structure of electron density in the ionosphere. In the present paper, the Residual Minimization Training Neural Network (RMTNN) method is selected as the ionospheric tomography with which to ...