OKUBO Kan

J-GLOBAL         Last updated: Jul 9, 2019 at 10:13
 
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Name
OKUBO Kan
Affiliation
Tokyo Metropolitan University
Job title
Associate Professor
Degree
Doctor of Eng.(Tohoku University)
Research funding number
90336446

Research Areas

 
 

Education

 
 
 - 
2004
Graduate School, Division of Engineering, Tohoku University
 
 
 - 
1999
Faculty of Engineering, Tohoku University
 

Published Papers

 
T. OKUGI, H. YAMADA, and K. OKUBO
IEICE TRANSACTIONS on Electronics   E101-C(8) 640-643   Aug 2018   [Refereed]
To clarify radio propagation characteristics and the mechanism for vehicle-to-vehicle communications in urban areas, this study presents a PML implementation using approximation in the high-frequency band as an elemental technology. We evaluated t...
Y. Katori and K. Okubo
IEICE Communications Express   7(10) 352-357   Jul 2018   [Refereed]
For years, researchers have been studying the relation between earthquakes and geomagnetic field signals using observation results. Following our continuous geomagnetic observation, this report describes geomagnetic signal changes generated by ear...
A. Fukuda, K. Okubo, T. Oshima, M. Kanamori, and T. Tsuchiya
Jpn. J. Appl. Phys.   57(7S1) 07LC09.1-07LC09.8   Jun 2018   [Refereed]
Our study group is investigating the acoustic simulation with background flow using the constrained interpolation profile (CIP) method. The CIP method is a type of method of characteristics (MOC) used for time domain numerical analysis. In this st...
Y. Katori, S. Isogami, T. Hato, A. Tsukamoto, K. Tanabe, N. Ohnishi, C. Furukawa, and K. Okubo
IEICE Communications Express   7(3) 71-76   Dec 2017   [Refereed]
Our research group reported successful observation of "co-faulting" Earth's magnetic field changes due to piezomagnetic effects caused by earthquake rupturing in 2008 Iwate-Miyagi Nairiku earthquake of M7.2 using geomagnetic observation system wit...
R. Imai, N. Kawada, Y. Katori, Y. Suzuki, and K. Okubo
Acoust. Sci. Technol.   38(6) 314-317   Nov 2017   [Refereed]
Y. Asakura, K. Okubo, and N. Tagawa
Jpn. J. Appl. Phys.   56(7S1) 07JC14.1-07JC14.5   Jun 2017   [Refereed]
Acoustic sensing technology in air is a promising method for acquiring the shape and/or position of a target. Universal and smart technology, however, cannot be sufficiently established because of various acoustic environmental noises, attenuation...
Y. Ishiguro, J. Zhu, N. Tagawa, T. Okubo, and K. Okubo
Jpn. J. Appl. Phys.   56(7S1) 07JD11   Jun 2017   [Refereed]
In recent years, high-performance piezoelectric micromachined ultrasonic transducers (PMUTs) have been fabricated by micro electro mechanical systems (MEMS) technology. For high-resolution imaging, it is important to broaden the frequency bandwidt...
石塚崇,大久保寛
The journal of the INCE of Japan   41(1) 12-16   Feb 2017   [Refereed]
Y. Matsumura, K. Okubo, N. Tagawa, T. Tsuchiya, and T. Ishizuka
Acoust. Sci. Technol.   38(1) 31-34   Jan 2017   [Refereed]
T. Wada, Y. Ho, K. Okubo, N. Tagawa, and Y. Hirose
Phys. Procedia   1216-1220   Nov 2015
This study addresses the efficient extension of the Super resolution FM-Chirp correlation Method (SCM) to the framework of synthetic aperture imaging. The original SCM needs to transmit focused beams many times while changing frequency little by l...
T. Hiraoka, N. Tagawa, K. Okubo, and I. Akiyama
Acoust. Sci. Technol.   36(3) 201-207   Mar 2015   [Refereed]
N. Kawada, K. Okubo, N. Tagawa, T. Tsuchiya, and T. Ishizuka
Acoust. Sci. Technol.   36(3) 268-270   Mar 2015   [Refereed]
Acoustic simulation in the time domain is an effective technique for the estimation of time-series sound pressure data. For time domain acoustic simulation, the development of a visualization method is a very important technical issue. The finite-...
N. Kawada, K. Okubo, N. Tagawa, and T. Tsuchiya,
Acoust. Sci. Technol.   36(3) 265-267   Mar 2015   [Refereed]
The constrained interpolation profile (CIP) method is a novel low-dispersion numerical scheme. It is a method of characteristics (MOC). The feature of the CIP method is that it uses acoustic fields and their spatial derivatives at grid points to s...
T. Tsuchiya, S. Sugimura, and K. Okubo
Jpn. J. Appl. Phys.   53(7S) 07KC02,1-07KC02,3   Jun 2014   [Refereed]
A new method for the numerical analysis of sound waveforms is proposed, in which the advantages of the finite-difference time-domain (FDTD) and constrained interpolation profile (CIP) methods are combined. In the frequency domain, the amplitude ch...
T. Ishizuka and K. Okubo
Acoust. Sci. Technol.   34(5) 378-381   Sep 2013   [Refereed]
K. Nii, N. Tagawa, K. Okubo, and S. Yagi
Jpn. J. Appl. Phys.   52(7S) 07HF23.1-07HF23.8   Jul 2013   [Refereed]
Shear wave elastography has attracted attention because of its possibility for quantitative measurement of tissue elasticity. However, conventional methods for shear wave elastography have shortcomings. To solve the shortcomings, we propose a new ...
T. Ishii, T. Tsuchiya, and K. Okubo
Jpn. J. Appl. Phys.,   52(7S) 07HC11.1-07HC11.7   Jul 2013   [Refereed]
In this study, the compact explicit-finite difference time domain (CE-FDTD) method is applied to the three-dimensional sound field analysis to reduce computer resources. There are various derivative schemes in the CE-FDTD method. They are first ex...

Misc

 
N.Araki, R.Imai, Y.Suzuki, K.Okubo
39th Symp. Ultrason. Electron.   39 no.1P2-13   Oct 2018
T.Magome, K.Okubo
39th Symp. Ultrason. Electron.   39 no.1P2-2   Oct 2018
Y.Yamamoto, K.Okubo
39th Symp. Ultrason. Electron.   39 no.1J1-4   Oct 2018
Y. Yamamoto and K. Okubo
IEEE Int. Ultrason. Symp.,   no.P2-B1-2   Oct 2018
In recent years, there are some studies that report the method to levitate and manipulate a particle using ultrasonic waves. In the conventional acoustic levitation method using the compact acoustic delay-lines device, however, it was so difficult...
Y. OISHI, Y. KATORI, T. HATO, A. TSUKAMOTO, K. TANABE, S. ISOGAMI, C. FURUKAWA, N. ONISHI, and K. OKUBO
AOGS 2018   SE23-A022    Jun 2018
K. Nishikawa, K. Okubo, Y. Katori, and N. Takeuchi
Asia-Pacific Signal Inf. Process. Assoc. Annu. Summit Conf. (APSIPA ASC)   1400-1405   Dec 2017
This paper considers applying the mean shift clustering algorithm for removing the noise due to the trapping of magnetic flux added to the geomagnetic variations measured using the HTS-SQUID magnetometers. Recently, HTS-SQUID magnetometers are use...
An Experimental Investigation of Super-Resolution Ultrasonic Imaging Based on Synthetic Aperture Scheme
J. Zhu, Y. Ho, K. Okubo, and N. Tagawa
12th TOIN Int. Symp. Biomed. Eng.,   166-167   Nov 2017
A. Fukuda, K. Okubo, T. Oshima, T. Tsuchiya, and M. Kanamori
38th Symp. Ultrason. Electron   no.2P2‐9   Oct 2017
Y. Asakura, K. Okubo, and N. Tagawa
38th Symp. Ultrason. Electron   no.3J2‐5   Oct 2017
N. Tagawa, J. Zhu, N. C. Hai, Y. Ho, and K. Okubo
38th Symp. Ultrason. Electron   no.2P5‐9   Oct 2017
C. Ogawa, K. Okubo, and T. Tsuchiya,
J. Acoust. Soc. Am   140(4) 3251-3251   Nov 2016
To date, numerical analysis for sound wave propagation in time domain has been investigated widely as a result of advances in?computer?technology. The?finite difference time domain?(FDTD)methods are very widely used for time domain numerical analy...
Y. Asakura, K. Okubo, and N. Tagawa
J. Acoust. Soc. Am   140(4) 3274-3274   Nov 2016
Acoustic sensing?technology?in the air is a promising method to acquire shapes and/or position of a target object. Universal and smart?technology?in?Acoustic sensing,?however, cannot be sufficiently established because of various acoustic?environm...
T. Sonobe, K. Okubo, N. Tagawa, and T. Tsuchiya
J. Acoust. Soc. Am   140(4) 3249-3249   Nov 2016
Utilizing the?Doppler effect?(the?Doppler?frequency shift) is an effective method to?detect?the speed of the moving object; in particular, the?measurement?of the acoustic?Doppler effect?might be an important for recognition of the surrounding envi...
H. Maruyama, K. Okubo, and N. Tagawa
J. Acoust. Soc. Am   140(4) 3059-3059   Nov 2016
Interpolation?is an essential technique to obtain continuous data from discrete data within a known range of coordinates in many research areas. Especially,?resampling?acoustic?signal?is an important application. It is necessary to obtain the valu...
S. Ogino and K. Okubo
J. Acoust. Soc. Am   140(4) 3431-3431   Nov 2016
Many researches on the screeching sound have been investigated for some decades. Halpern?et al.(1986) reported acoustic evaluation of “chilling sound” as a pioneering study. The screeching sound makes us feel so-called hair-raising, bloodcurdling ...
A. Fukuda, K. Okubo, T. Oshima, T. Tsuchiya, and M. Kanamori
J. Acoust. Soc. Am   140(4) 3250-3250   Nov 2016
To date, numerical simulation for sound wave propagation has been widely investigated as a result of advances in?computer?technology.?For?acoustic imaging?and prediction, the development of accurate and effective?analysis?methods in time domain ha...
A Study for Ultrasonics Super Resolution Imaging Using Tissue Harmonics,
J. Zhu, S. Hamazumi, Y. Ho, K. Okubo, and N. Tagawa
Symp. Ultrason. Electron   37 2   Nov 2016
A. Fukuda, K. Okubo, and T. Tsuchiya,
Symp. Ultrason. Electron   3P2-6 ROMBUNNO.3P2‐6   Nov 2016
R. Imai, Y. Suzuki, K. Okubo, Y. Katori, and N. Kawada
J. Acoust. Soc. Am   140(6) 3261-3261   Nov 2016
There have been many discussions about hardware-accelerations for the large-scale finite-difference time-domain (FDTD) method to deal with various wave dynamics in scientific and engineering computations. Recently, there is growing interest in man...

Books etc

 
音響技術
OKUBO Kan (Part:Joint Work, いまさら聞けない波動数値シミュレーション)
一般社団法人日本音響材料協会   Mar 2019   
検査技術
大久保寛,波頭経裕,塚本晃,田辺圭一,大西信人,古川克,磯上慎二,竹内伸直 (Part:Joint Work, 緊急地震超速報システムの実現に向けて: 高感度地磁気観測のための HTS-SQUID 磁力計の開発と応用)
日本工業出版株式会社   Jan 2014   
Computational Simulation in Architectural and Environmental Acoustics
K. Okubo (Part:Contributor, (Chap.5)Methods and Applications of Wave-Based Computation(Chap.5))
Springer Japan   2014   ISBN:978-4-431-56343-3
画像ラボ
若林洸祐,田川憲男,大久保寛 (Part:Joint Work, 複数視点画像の一貫性に基づく三次元情報の復元)
日本工業出版株式会社   Aug 2013   
電子情報通信学会誌
柏達也,大久保寛 (Part:Contributor, 計算機アーキテクチャに基づくシミュレーションの高速化技術)
電子情報通信学会   Jun 2013   
超音波テクノ3-4月号
田川憲男,山村拓也,田邉将之,大久保寛 (Part:Joint Work, 生体高調波画像の雑音低減法: 基本波エコーの統計的性質を利用)
日本工業出版株式会社   Apr 2013   
東海大学海洋研究所研究報告
竹内昭洋,大久保寛,磯上慎二,香取勇太,長尾年恭,竹内伸直 (Part:Joint Work, 日本時間 2012 年 5 月 21 日の金環日食に伴う日本列島における地磁気変化)
東海大学海洋研究所   Mar 2013   
ケミカルエンジニヤリング
大久保寛,竹内伸直 (Part:Joint Work, 地震・津波の革新的発生検知法: 緊急警報システムへの応用)
化学工業社   Mar 2013   
SOUND
大久保寛
一般財団法人カワイサウンド技術・音楽振興財団   Jan 2013   
はじめての音響数値シミュレーションプログラミングガイド
コロナ社   Nov 2012   ISBN:978-4339008388
鉱山をゆく
大久保寛
イカロス出版   Aug 2012   ISBN:978-4863206236
オーム
大久保寛,竹内昭洋,竹内伸直 (Part:Joint Work, 地震・津波の革新的発生検知法と緊急警報への応用)
2012   
電気学会論文誌 A 電気学会技術開発レポート
大久保寛 (Part:Contributor, GPGPU による電磁界解析の高速化の現状と課題)
一般社団法人 電気学会   2011   
超音波テクノ第22巻 1号
紺野正仁,大久保寛,田川憲男,土屋隆生 (Part:Joint Work, CIP 法を用いた非線形音波伝搬の二次元数値解析)
日本工業出版株式会社   Feb 2010   
超音波テクノ第21巻 6号
大久保寛,藤原幹己,田川憲男 (Part:Joint Work, 時間領域超音波計測における FM チャープ信号を用いたパルス圧縮と MUSIC アルゴリズムによる超解像手法)
日本工業出版株式会社   Dec 2009   

Conference Activities & Talks

 
ハイレゾ音響特性解析を用いた類似するデザインの硬貨の識別
中里尚子, 真鍋友花, 大久保寛
信学技報   15 Mar 2019   
広域同期集音に向けた分散マイクロホン無線ネットワークシステム構成
渡邊晃弘, 大久保寛, 田川憲男
信学技報   15 Mar 2019   
アルカリ乾電池の残量の有無判別のための効果的な打音法
馬込智瑛, 大久保寛
信学技報   15 Mar 2019   
半球状超音波アレイを用いた音響粒子砲
山本豊, 大久保寛
信学技報   15 Mar 2019   
単耳聴方向決定帯域の刺激音帯域幅に関する検討
山田美知花, 佐瀬文一, 堀内俊治, 大久保寛
信学技報   15 Mar 2019   
福島県いわき観測点における地磁気並行観測
大石悠斗,磯上慎二,波頭経裕,塚本晃,田辺圭一,古川克,大西信人,大久保寛
平成30年度 Conductivity Anomaly 研究会 (SGEPSS分科会)   11 Jan 2019   
香西諒也, ZHU Jing, 大久保寛, 田川憲男
映情学技報   17 Dec 2018   
中里尚子,十文字晴哉,甫立健悟,望月勇希,若松星那,真鍋友花,荻野秀哉,大久保寛
音響学会秋季研究発表会   14 Sep 2018   
山本豊,大久保寛
音響学会秋季研究発表会   14 Sep 2018   
音の高解像度化と応用:可聴音域外の音による識別・センシング
大久保寛,馬込智瑛,佐瀬文一,堀内俊治
音響学会秋季研究発表会   14 Sep 2018   
馬込智瑛,大久保寛
音響学会秋季研究発表会   14 Sep 2018   
荒木夏彦,今井稜,鈴木敬久,大久保寛
音響学会秋季研究発表会   13 Sep 2018   
佐瀬文一,大久保寛,飯田一博
音響学会秋季研究発表会   12 Sep 2018   
佐瀬文一,山田美知花,堀内俊治,大久保寛
音響学会秋季研究発表会   12 Sep 2018   
真鍋友花,大久保寛
音響学会秋季研究発表会   12 Sep 2018   
荻野秀哉,馬込智瑛,大久保寛
音響学会秋季研究発表会   12 Sep 2018   
佐瀬文一, 山田美知花, 大久保寛
信学技報   23 Aug 2018   
荒木夏彦,今井稜,河田直樹,鈴木敬久,大久保寛
計算工学講演会論文集   7 Jun 2018   
ZHU Jing, HAMAZUMI Shuntaro, HO Yihsin, OKUBO Kan, TAGAWA Norio
信学技報   27 Apr 2017   

Research Grants & Projects

 
Electromagnetic field numerical analysis using CIP and FDTD method.
0006 (Japanese Only)
The signal analysis using the natural observation method.
0006 (Japanese Only)