Updated on 2026/07/30

写真a

 
Sugita Naohiro
 
Organization
Institute of Integrated Research Laboratory for Future Interdisciplinary Research of Science and Technology Assistant Professor
Title
Assistant Professor
Homepage
http://www.precisionmechatronics.mech.e.titech.ac.jp/
External link

Research Interests

  • Bubble dynamics / Vibration engineering / Fluid engineering / Cavitation / Ultrasound / Multiphase flow / Nonlinear dynamics

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering  / 超音波/マイクロバブル/超音波キャビテーション/気泡振動

Education

Research History

  • Institute of Science Tokyo   Assistant Professor

    2024.10

    　 More details

  • Tokyo Institute of Technology   Assistant Professor

    2019.4

    　 More details

  • 株式会社IHI   技術開発本部

    2017.4 - 2019.3

    　 More details

Professional Memberships

Committee Memberships

  •   日本機械学会 機械力学・計測制御部門運営委員会  

    2020.4 - 2022.3   

    　 More details

Papers

  • Experimental analysis of number concentration and disruption rate of two-dimensionally distributed microcapsules Invited International journal

    SUGITA Naohiro, SHINSHI Tadahiko

    Transactions of the JSME (in Japanese)   87 ( 895 )   20 - 00193-20-00193   2021

    　More details

    Authorship：Lead author,　Last author,　Corresponding author   Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    <p>Disruption of gas-filled microcapsules under pulsed ultrasound irradiation is experimentally studied. The goal of this study is to evaluate the disruption rate of the polymer-shelled microcapsules as a function of the mean number concentration of the microcapsule population. In the present study, we defined the disruption of a microcapsule as decapsulation of the shell layer followed by exposure of an internal gas bubble, growing to visually detectable size through mass diffusion. An experimental setup has been designed to sonicate two-dimensionally dispersed microcapsules in a planar microchamber. Pulsed ultrasound at 1 MHz is irradiated normal to the chamber from a planar ultrasound transducer. Pure water and glycerol aqueous solution of 30 wt. % were used as the dispersion media. Image processing of the recorded microscopic images yields capsule size distribution and local concentration distribution defined as an inverse of the occupied area of the capsule position (Voronoi area). The mean number concentration is controlled over a wide range from 5 to 200 capsules/mm2, while the mean capsule diameter is controlled between 25 and 40 μm regardless of the concentration. The disruption rate is evaluated comparing the number of disrupted microcapsules (gas bubbles) and the total number of microcapsules in the target area of the ultrasound irradiation. The disruption rate turned out to decrease with the mean concentration and is inversely proportional to the mean concentration for the particular case of the two-dimensional spatial distribution.</p>

    DOI： 10.1299/transjsme.20-00193

    CiNii Research

  • Numerical Analysis of Superharmonic Resonance in Electromagnetic Vibration Energy Harvester with Ball Impacts Invited International journal

    SUGITA Naohiro, KINE Makoto, HAN Dong, SHINSHI Tadahiko

    The Proceedings of the Dynamics & Design Conference   2020 ( 0 )   135   2020

    　More details

    Authorship：Lead author,　Last author,　Corresponding author   Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    <p>The superharmonic resonance of a cantilever beam subject to mechanical ball impacts is investigated numerically for potential vibration energy harvesting. In our device, a multipole magnet array attached on the cantilever moves above a planar coil array fixed on the baseplate of the device, leading to power generation through electromagnetic induction. In the numerical model, the cantilever is assumed to be a single DOF damped mass-spring system, which is coupled with the translational motion of a point mass through the classical collision model. The Fourier amplitudes of the cantilever's displacement have been obtained and compared with the experimental results. It is found that the numerical solution of the superharmonic components shows quantitative agreement with the experiment in the low-frequency range associated with human-induced motions. The excitation region of the superharmonics has been represented as a function of the excitation frequency and the gap distance of the ball motion.</p>

    DOI： 10.1299/jsmedmc.2020.135

    CiNii Research

  • Nonlinear resonance-type electromagnetic vibration energy harvester excited by an impact ball Invited International journal

    SUGITA Naohiro, KINE Makoto, HAN Dong, SHINSHI Tadahiko

    The Proceedings of the International Conference on Motion and Vibration Control   2020 ( 0 )   10065   2020

    　More details

    Authorship：Lead author,　Last author,　Corresponding author   Language：English   Publisher：The Japan Society of Mechanical Engineers  

    <p>Nonlinear resonance of a cantilever beam under mechanical impacts is investigated experimentally for energy harvesting from human induced low-frequency vibration. In the prototype of this study, a metal ball is used to yield impulsive forces acting upon the cantilever installed in an electromagnetic type vibration energy harvester. A multipole magnet array attached on the cantilever moves above a planar coil fixed on the baseplate of the device, leading to power generation through electromagnetic induction. Due to the nonlinear excitation force arising from ball impacts, superharmonic resonance occurs at integer fractional frequencies of the cantilever’s natural frequency. Nonlinear response amplitudes of the cantilever and resulting induced voltage are measured under continuous sinusoidal excitation at 1-20 Hz. To explore resonance characteristic, we examine three cantilevers with different natural frequencies: 21, 34 and 76 Hz. In addition, the travelling distance of the ball is altered to realize maximum induced voltage. It is found that the travelling distance needs to be tuned depending on the natural frequency of the cantilever because there is an optimal distance for power generation. For a larger travelling distance, the induced voltage decreases. The critical distance can be numerically estimated by using the analytical model based on a single DOF damped mass-spring system. Combination of the frequency up-conversion technique and tuning strategy developed in this study offers a fundamental advantage for low-frequency vibration energy harvesting with compact device dimensions compared to the commonly used on-resonance harvesters.</p>

    DOI： 10.1299/jsmeintmovic.2020.15.10065

    CiNii Research

  • Compact low-frequency ultrasound transducer leveraging cavity resonance for transdermal drug delivery Invited Reviewed International journal

    Shinya Yamamoto, Yusuke Yamamsaki, Naohiro Sugita, Tadahiko Shinshi

    SENSORS AND ACTUATORS A-PHYSICAL   405   2026.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.sna.2026.117793

    Web of Science

    researchmap

  • 超音波キャビテーションによる経皮吸収促進技術

    杉田直広

    月刊ＪＥＴＩ 2026年8月号   74 ( 8 )   31 - 34   2026.7

    　More details

    Authorship：Lead author   Language：Japanese  

    researchmap

  • バースト超音波霧化を用いた精密試料導入法の開発 Invited

    戸谷亮太, 府川大晟, 福智魁, 八井田朱音, 守岩友紀子, 杉田直広, 東海林敦, 沖野晃俊

    2026.7

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Spatial coherence-based evaluation of cavitation activity extent from acoustic cavitation noise under a flextensional transducer with spherical cavity for sonophoresis Invited Reviewed International journal

    Takanobu Kuroyama, Shinya Yamamoto, Naohiro Sugita, Tadahiko Shinshi, Hanako Ogasawara, Kazuyoshi Mori

    Japanese Journal of Applied Physics   2026.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

    DOI： 10.35848/1347-4065/ae6b91

    researchmap

  • Automated Manufacturing System for Bioartificial-Liver Alginate Beads Invited

    DINGXI CHEN, Naohiro Sugita, TADAHIKO SHINSHI, 市村健太郎, 米山鷹介, 熊谷真希, 武部貴則

    82   2026.3

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • アルギン酸ビーズ充填カラム型バイオ人工肝臓リアクタにおける血液灌流時の流動特性 Invited

    アリフ イブネアムゼド, 杉田直広, 進士忠彦, 市村健太郎, 米山鷹介, 熊谷真希, 武部貴則

    ライフサポート学会 第３５回フロンティア講演会予稿集   122   2026.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：ライフサポート学会 第35回フロンティア講演会 運営事務局  

    researchmap

  • Modal Excitation for Cracks in Two-Dimensional Elastic Half-Plane Using Boundary Element and Perturbation Methods Invited Reviewed International journal

    Taizo Maruyama, Naohiro Sugita

    JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME   147 ( 6 )   2025.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1115/1.4069136

    Web of Science

    researchmap

  • Noise Generation in Cylindrical Roller Bearings Under Low Preload and Low-Speed Conditions Invited Reviewed International journal

    Naohiro Sugita, Riku Fukazawa, Tadahiko Shinshi, Keisuke Mutoh, Yoshihiro Sato

    Proceedings of the 11th International Conference on Leading Edge Manufacturing in 21st century : LEM21   2025.12

    　More details

    Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：The Japan Society of Mechanical Engineers  

    researchmap

  • 2P5-15 Analysis of Acoustic Streaming in the Spherical Cavity of a Low-Frequency Ultrasonic Transducer for Transdermal Drug Delivery Invited

    Yamamoto Shinya, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   46   138 - 15   2025.11

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.46.0_2p5-15

    CiNii Research

    researchmap

  • 1P5-9 Mapping of Bubbles Generated by Flextensional Transducer Based on Spatial Coherence of Acoustic Cavitation Noise Invited

    Kuroyama Takanobu, Yamamoto Shinya, Sugita Naohiro, Shinshi Tadahiko, Ogasawara Hanako, Mori Kazuyoshi

    Proceedings of Symposium on Ultrasonic Electronics   46   54 - 9   2025.11

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.46.0_1p5-9

    CiNii Research

    researchmap

  • 2P5-14 Evaluation of cavitation activity in the modulated sound field formed by a multipole ultrasonic transducer Invited

    Yamasaki Yusuke, Yamamoto Shinya, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   46   137 - 15   2025.11

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.46.0_2p5-14

    CiNii Research

    researchmap

  • 低周波超音波導入法における音波音圧および照射時間が経皮薬物浸透性のばらつきに及ぼす影響 Invited

    山本真也, 杉田直広, 藤堂浩明, 進士忠彦

    日本電子材料技術協会 2025年 第62回秋期講演大会予稿集   2025.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本電子材料技術協会  

    researchmap

  • Experimental Study of Super-resolution Ultrasonography with High Concentration UCAs Invited

    Junseok AN, Naohiro SUGITA, Shinnosuke HIRATA, Tadahiko SHINSHI

    超音波エレクトロニクスの 基礎と応用に関するシンポジウム（USE2025）講演論文集   2P2 - 3   2025.11

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：超音波エレクトロニクス協会USEシンポジウム運営委員会  

    researchmap

  • Pressure Intensity and Treatment Duration in Ultrasound-assisted Drug Permeability Enhancement on Mouse Skin Invited International journal

    Shinya Yamamoto, Naohiro Sugita, Hiroaki Todo, Tadahiko Shinshi

    Abstracts of ISBE-IWNT2025   136 - 137   2025.10

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Effect of Particle Size on the Destruction of Shelled Microbubbles by Focused Ultrasound Invited

    KANASHIMA Junsyou, SUGITA Naohiro, SHINSHI Tadahiko

    The Proceedings of Mechanical Engineering Congress, Japan   2025   J021-05 - 05   2025.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japan Society of Mechanical Engineers  

    Ultrasound-triggered disruption of microbubbles in drug delivery systems (DDS) is a promising technique for reducing side effects. Despite its potential efficacy in reducing side effects, the disruption ratio of the microbubble population remains poorly understood. In this study, we experimentally investigated the effects of diameter distribution and particle number concentration (PNC) of the microbubbles on their disruption ratio by quantifying the number of disrupted bubbles after ultrasonic irradiation. The experiments were conducted using polymer-shelled microbubbles suspended in a gelatin-filled microchamber and exposed to focused ultrasound at 1 MHz with 30 cycles. The size of microbubbles was sorted by filtration, and the concentration within the microchamber was determined by image processing. The disruption ratio of each microbubble population was evaluated as a function of PNC. The sorted microbubble population with resonant size exhibited a significantly greater disruption ratio, exceeding that of polydisperse populations by more than twofold. Moreover, the results showed an exponential decrease in the disruption ratio with increasing PNC, accompanied by a monotonic increase in the number of intact microbubbles. This suggests an increased risk of side effects even in the resonant-sized microbubble population at high PNC. Conversely, in the low PNC region, where the disruption ratio is higher, the lower number of disrupted microbubbles may lead to prolonging the treatment time. These findings highlight the necessity of determining an appropriate PNC by considering both treatment time and the risk of side effects.

    DOI： 10.1299/jsmemecj.2025.j021-05

    CiNii Research

    researchmap

  • 超音波霧化と低温プラズマイオン化を用いた溶液中の分子分析 Invited

    戸谷亮太, 太原誠也, 清水祐哉, 八井田朱音, 守岩友紀子, 杉田直広, 東海林敦, 沖野晃俊

    2025.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Measurement and Numerical Analysis of Acoustic Scattering by Microbubbles Utilizing Phase-inverted Ultrasound Excitation Invited

    KANASHIMA Junsyou, AN Junseok, SUGITA Naohiro, SHINSHI Tadahiko

    The Proceedings of Mechanical Engineering Congress, Japan   2025   J021-06 - 06   2025.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japan Society of Mechanical Engineers  

    Contrast-enhanced ultrasound imaging (CEUS) is a commonly used non-invasive technique for cancer detection that utilizes ultrasound contrast agents (UCAs). . However, its low signal-to-noise ratio (SNR) limits detectability in deep tissues and small vessels. To enhance acoustic scattering of UCAs, we have proposed the use of phase-inverted ultrasound excitation and assessed its effectiveness through both experimental and numerical evaluations. The phase-inverted field was generated by dividing the array elements into multiple groups and driving adjacent groups with opposite phases. Scattering coefficients under two-division and three-division driving methods were compared with conventional non-division driving one. In this study, 20 ± 9 μm microbubbles were insonified with a three-cycle burst wave at 1.38 MHz, and scattering was measured as a function of inter-bubble distance (IBD). The results showed that scattering increased as IBD decreased. Among the driving methods, three-division driving method yielded the highest scattering coefficient, exceeding that of non-division driving one by 14% in experiments and 11% in simulations. These findings suggest that multi-division excitation enhances acoustic scattering of microbubbles and may improve CEUS performance in deep tissues and fine vasculature.

    DOI： 10.1299/jsmemecj.2025.j021-06

    CiNii Research

    researchmap

  • 多極超音波トランスデューサによる変調音場を用いた経皮薬物送達 Invited

    山﨑悠介, 山本真也, 杉田直広, 進士忠彦

    日本音響学会 第154回（2025年春季）研究発表会 講演論文集   2025.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本音響学会  

    researchmap

  • UCA Separation Using Virtual Images Generated by Steering Phase-Patterned Waves Invited International journal

    Junseok An, Naohiro Sugita, Tadahiko Shinshi

    2025 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM, IUS   2025.9

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/IUS62464.2025.11201364

    Web of Science

    researchmap

  • Enhancing Small-Molecule Drug Permeability Utilizing a Compact Low-frequency Ultrasonic Transducer Invited International journal

    Shinya Yamamoto, Naohiro Sugita, Tadahiko Shinshi

    2025 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM, IUS   2025.9

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/IUS62464.2025.11201379

    Web of Science

    researchmap

  • Flow Circuit Optimization in a Bioartificial Liver System through Machine Learning-augmented CFD Simulation and Experimental Verification Invited

    Dingxi Chen, Naohiro Sugita, Kentaro Ichimura, Yosuke Yoneyama, Maki Kumagai, Takanori Takebe

    日本機械学会 2025年度年次大会予稿集   J024 - 01   2025.9

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • in vitro試験におけるマウス皮膚への小形低周波超音波トランスデューサ低分子薬物の導入 Invited

    山本真也, 杉田直広, 藤堂浩明, 進士忠彦

    日本音響学会 第154回（2025年春季）研究発表会 講演論文集   2025.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本音響学会  

    researchmap

  • 超音波霧化と低温プラズマイオン化を用いた溶液中分子の高感度分析 Invited

    戸谷亮太, 太原誠也, 清水祐哉, 八井田朱音, 守岩友紀子, 杉田直広, 東海林敦, 沖野晃俊

    2025.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • フレックステンショナル型振動子による超音波キャビテーション生成 Invited

    杉田直広, 山本真也, 進士忠彦

    信学技報   2025.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：電気情報通信学会超音波研究会  

    researchmap

  • A compact and low-frequency ultrasound transducer designed for minimally invasive delivery of biopharmaceuticals through skin Invited International journal

    Shinya yamamoto, Naohiro Sugita, Tadahiko Shinshi

    2025.8

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Isolation of microbubbles beyond Sparrow's resolution limit in super-resolution ultrasonography using phase patterned waves Invited Reviewed International journal

    Junseok An, Naohiro Sugita, Tadahiko Shinshi

    PHYSICS IN MEDICINE AND BIOLOGY   70 ( 14 )   145025   2025.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1361-6560/adeb3d

    Web of Science

    researchmap

  • 超音波霧化と低温プラズマイオン化を用いた溶液中分子の質量分析 Invited

    戸谷亮太, 太原誠也, 清水祐哉, 八井田朱音, 守岩友紀子, 杉田直広, 東海林敦, 沖野晃俊

    2025.7

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • 超音波霧化と低温プラズマイオン化を用いた新しい分析法の開発 Invited

    戸谷亮太, 太原誠也, 清水祐哉, 八井田朱音, 守岩友紀子, 杉田直広, 東海林敦, 沖野晃俊

    2025.7

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • 超音波造影剤の位置検出精度の検討 Invited

    杉田直広, 丸山泰蔵

    計算工学講演会論文集   Vol. 30   2025.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：第30回計算工学講演会 実行委員会  

    researchmap

  • 超音波で皮膚の物質浸透性を促進 Invited

    杉田 直広

    2025.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • マイクロバブルの超音波振動を利用した治療と診断 Invited

    杉田 直広

    2025.6

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

    researchmap

  • 集束超音波によるシェル付きマイクロバブルの破壊における粒子数濃度の影響 Invited

    金島潤昇, 杉田直広, 進士忠彦

    日本機械学会 第37回バイオエンジニアリング講演会抄録集   25-11   P2 - 28   2025.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • 肝臓オルガノイドを用いた治療を想定したアルギン酸ビーズからの物質放出の評価 Invited

    ALIF IBNE AMZED, CHENDINGXI, 杉田 直広, 進士 忠彦, 市村 健太郎, 米山 鷹介, 熊谷 真希, 武部 貴則

    日本機械学会 第37回バイオエンジニアリング講演会抄録集   25-11   P2 - 26   2025.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • 放射状着磁された磁性エラストマを用いた人工筋肉の研究 Invited

    伊藤 涼, 永井 慧大, 杉田 直広, 進士 忠彦

    第37回「電磁力関連のダイナミクス」シンポジウム講演論文集   25-23   23B3 - 2   2025.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • 位相反転超音波によるマイクロバブルの音響散乱の計測 Invited

    金島潤昇, An Junseok, 杉田直広, 進士忠彦

    日本機械学会 第37回バイオエンジニアリング講演会抄録集   25-11   P1 - 42   2025.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • Flow circuit optimization in a bioartificial liver system through machine learning-augmented CFD simulation Invited

    DINGXI CHEN, Naohiro Sugita, TADAHIKO SHINSHI, 市村 健太郎, 米山 鷹介, 熊谷 真希, 武部 貴則

    日本機械学会 第37回バイオエンジニアリング講演会抄録集   25-11   P2 - 29   2025.5

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • TRANSDERMAL DRUG DELIVERY OF MIDDLE AND MACROMOLECULES UTILIZING A COMPACT AND LOW-FREQUENCY ULTRASOUND TRANSDUCER Invited International journal

    Shinya Yamamoto, Naohiro Sugita, Tadahiko Shinshi

    Proceedings of the 20th Congress of World Federation for Ultrasound in Medicine and Biology   2025.5

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • 超音波によるマイクロバブルの位置検出—微小血管の短時間描出を目指して Invited

    杉田 直広

    精密工学会学術講演会講演論文集   2025S   581 - 582   2025.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：公益社団法人 精密工学会  

    マイクロバブルを造影剤として利用する超解像度超音波イメージングの音響データ取得時間の短縮を目的とし，位相に空間的なパターンを形成した超音波ビームによる新たなイメージング手法の提案と原理検証を行った．気泡力学を考慮した音響シミュレーションにより，提案手法がプローブからより離れた位置にあるバブルの検出率向上が予測され，検証実験で同様の傾向を確認した．

    DOI： 10.11522/pscjspe.2025s.0_581

    CiNii Research

    researchmap

  • Effects of multi-divisional driving using a linear array transducer on microbubble backscattering Invited Reviewed International journal

    Junsyou Kanashima, Junseok An, Naohiro Sugita, Tadahiko Shinshi

    APPLIED ACOUSTICS   231   2025.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.apacoust.2024.110482

    Web of Science

    researchmap

  • A Flexural Ultrasonic Transducer for Inducing Acoustic Cavitation on Material Surfaces Invited Reviewed International journal

    Naohiro Sugita, Shinya Yamamoto, Keita Tomioka, Tadahiko Shinshi

    JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES   12   1413 - 1422   2024.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s42417-024-01482-1

    Web of Science

    researchmap

  • 3P5-10 Numerical model of contrast-enhanced ultrasound imaging coupled with nonlinear bubble dynamics Invited International journal

    An Junseok, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   45   217   2024.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.45.0_3p5-10

    CiNii Research

    researchmap

  • 2P5-16 A traveling wave mode ultrasonic transducer for low-frequency sonophoresis Invited International journal

    Yamasaki Yusuke, Yamamoto Shinya, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   45   146   2024.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.45.0_2p5-16

    CiNii Research

    researchmap

  • 2P5-2 A compact cavity resonant ultrasound transducer for transdermal drug delivery of biopharmaceuticals Invited International journal

    Yamamoto Shinya, Sugirta Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   45   132   2024.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.45.0_2p5-2

    CiNii Research

    researchmap

  • A compact and low-frequency drive ultrasound transducer for facilitating cavitation-assisted drug permeation via skin Invited Reviewed International journal

    Shinya Yamamoto, Naohiro Sugita, Keita Tomioka, Tadahiko Shinshi

    BIOMEDICAL PHYSICS & ENGINEERING EXPRESS   10 ( 6 )   2024.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/2057-1976/ad7596

    Web of Science

    researchmap

  • 超音波内視鏡を用いた超解像度イメージングによる胆膵疾患の微小血管描出 Invited

    AN JUNSEOK, 杉田 直広, 進士 忠彦, 小林 正典

    第33回MAGDAコンファレンス in 東京（MAGDA2024）講演論文集   PS - 18   2024.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本AEM学会  

    researchmap

  • 境界要素法と摂動法を用いた開領域の固有周波数の加振問題への 応用 Invited Reviewed

    丸山 泰蔵, 杉田 直広

    2024.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • キャビテーションを用いた経皮薬物送達用ポータブルデバイス Invited

    山本 真也, 杉田 直広, 進士 忠彦

    第33回MAGDAコンファレンス in 東京（MAGDA2024）講演論文集   PS - 14   2024.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本AEM学会  

    researchmap

  • MODAL EXCITATION ANALYSIS FOR INTERIOR AND SURFACE-BREAKING CRACKS IN TWO-DIMENSIONAL HALF PLANE USING BOUNDARY ELEMENT AND PERTURBATION METHODS Invited Reviewed International journal

    Taizo Maruyama, Naohiro Sugita

    PROCEEDINGS OF ASME 2024 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2024, VOL 1   2024.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    Web of Science

    researchmap

  • Noise of Cylindrical Roller Bearings with Low Preload Assembly Invited Reviewed International journal

    Riku Fukazawa, Tadahiko Shinshi, Naohiro Sugita, Keisuke Mutoh, Yoshihiro Sato

    2024.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • An electromagnetic microactuator with tunable dynamic characteristics using a thick-film FePt permanent magnet Invited Reviewed International journal

    Chao Qi, Yu Miyahara, Ziteng Wang, Naohiro Sugita, Masaki Nakano, Tadahiko Shinshi

    AIP ADVANCES   14 ( 9 )   2024.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1063/5.0217914

    Web of Science

    researchmap

  • 低周波超音波導入法のための小形キャビティ共振型トランスデューサ Invited

    山本真也, 杉田直広, 進士忠彦

    日本音響学会講演論文集（第152回）2024年9月   101 - 102   2024.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • マルチモード型超音波トランスデューサによるキャビテーション生成 Invited

    山﨑悠介, 山本真也, 杉田直広, 進士忠彦

    日本音響学会講演論文集（第152回）2024年9月   103 - 104   2024.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Excitation analysis for scatterers in an open domain using boundary element and perturbation methods Invited Reviewed International journal

    Taizo Maruyama, Naohiro Sugita

    2024.8

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Microbubble detection on ultrasound imaging by utilizing phase patterned waves Invited Reviewed International journal

    Junseok An, Naohiro Sugita, Tadahiko Shinshi

    PHYSICS IN MEDICINE AND BIOLOGY   69 ( 13 )   2024.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1088/1361-6560/ad5511

    Web of Science

    researchmap

  • Numerical study of Sound Scattering from Ultrasound Contrast Agents Invited

    Naohiro Sugita, Taizou Maruyama, Junseok AN, TADAHIKO SHINSHI

    2024.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Modal excitation for open domain using boundary element and perturbation methods Invited Reviewed International journal

    Taizo Maruyama, Naohiro Sugita

    2024.6

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • 超音波キャビテーション発生位置制御のための 多極電極超音波トランスデューサ Invited

    山﨑 悠介, 山本 真也, 杉田 直広, 進士 忠彦

    関東学生会第６３回学生員卒業研究発表講演会講演論文集   1134   2024.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • Radial Displacement Measurement Method in Bearingless Slice Motor Through Eddy Current Displacement Sensors Positioned on the Underside of the Rotor Invited Reviewed International journal

    Ren Yang, Zeqiang He, Naohiro Sugita, Tadahiko Shinshi

    IEEE ACCESS   12   26610 - 26625   2024.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/ACCESS.2024.3366345

    Web of Science

    researchmap

  • Batch Fine Magnetic Pattern Transfer Method on Permanent Magnets Using Coercivity Change during Heating for Magnetic MEMS Invited Reviewed International journal

    Keita Nagai, Naohiro Sugita, Tadahiko Shinshi

    MICROMACHINES   15 ( 2 )   2024.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/mi15020248

    Web of Science

    researchmap

  • Development of a flexible coil based on conductive polymer composite for PDMS-based soft electromagnetic microactuators Invited Reviewed International journal

    Chao Qi, Naohiro Sugita, Tadahiko Shinshi

    SENSORS AND ACTUATORS A-PHYSICAL   363   2023.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.sna.2023.114766

    Web of Science

    researchmap

  • Influence of permanent magnetic properties on laser-assisted heating magnetization for magnetic MEMS Invited Reviewed International journal

    Keita Nagai, Naohiro Sugita, Tadahiko Shinshi

    IEEE ACCESS   11   143446 - 143456   2023.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/ACCESS.2023.3341971

    Web of Science

    CiNii Research

    researchmap

  • APPLICATION OF EIGENFREQUENCY FOR AN OPEN DOMAIN TO EXCITATION PROBLEMS USING BOUNDARY ELEMENT AND PERTURBATION METHODS Invited Reviewed International journal

    MARUYAMA Taizo, SUGITA Naohiro

    Transactions of the Japan Society for Computational Methods in Engineering   23   93 - 98   2023.11

    　More details

    Language：Japanese   Publisher：Japan Society for Computational Methods in Engineering  

    This paper presents a perturbation analysis of the excitation problem for an open domain. As a fundamental study, it addresses wave scattering by a crack in a two-dimensional unbounded domain to avoid fictitious eigenfrequency issues, which are encountered in a boundary integral equation. The modal amplitude is approximated using the perturbation method, employing a Taylor expansion around the complex-valued eigenfrequency for the open domain. The eigenfrequency problem for an open domain is solved using boundary element and Sakurai-Sugiura methods. Several numerical results demonstrate that the perturbation solutions evaluate the modal amplitude with real-valued frequency excitation.

    DOI： 10.60443/jascome.23.0_93

    DOI： 10.1115/1.4069136_references_DOI_FIzpRCw2EfDPWKw2K4WWaqRLa5q

    CiNii Research

    researchmap

    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I033606283

  • 3P5-14 Microbubble detection and separation by using patterned ultrasound plane wave Invited International journal

    An Junseok, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   44   233   2023.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.44.0_3p5-14

    CiNii Research

    researchmap

  • 3J2-3 A low-frequency ultrasound transducer for creation of transdermal transport region Invited International journal

    Yamamoto Shinya, Tomioka Keita, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   44   171   2023.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.44.0_3j2-3

    CiNii Research

    researchmap

  • A Soft Electromagnetic Microactuator Using a PLD-made FePt Thick Film with Reconfigurable Magnetization Distribution Invited International journal

    Chao QI, Ziteng WANG, Yu MIYAHARA, Naohiro SUGITA, Tadahiko SHINSHI, Masaki NAKANO

    Abstract Booklet of ISBE2023/IWNT2023   64 - 65   2023.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • 超音波照射に対する気泡クラウドの過渡応答解析 Invited

    AN JUNSEOK, 杉田 直広, 進士 忠彦

    日本音響学会講演論文集   123 - 124   2023.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本音響学会  

    researchmap

  • 低周波超音波による経皮薬物導入のための小形トランスデューサ Invited

    山本真也, 冨岡圭太, 杉田直広, 進士忠彦

    日本音響学会講演論文集   111 - 112   2023.9

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本音響学会  

    researchmap

  • Microbubble Detection Using Spatially Patterned Ultrasound Beam Invited International journal

    Naohiro Sugita, Junseok An, Tadahiko Shinshi

    2023.9

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

    researchmap

  • A Novel Heteropolar Bearingless Slice Motor With a PM-Free Rotor for Centrifugal Blood Pump Applications Invited Reviewed International journal

    Zeqiang He, Naohiro Sugita, Tadahiko Shinshi

    IEEE ACCESS   11   100114 - 100124   2023.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/ACCESS.2023.3313165

    Web of Science

    researchmap

  • Sensorless Angle Estimation Based on Sliding Mode Observer for Disposable Centrifugal Blood Pump Using Doubly Salient Bearingless Slice Motor Invited International journal

    Zeqiang He, Ren YANG, Naohiro SUGITA, Tadahiko SHINSHI

    J09   2023.8

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：THE JAPAN SOCIETY OF MECHANICAL ENGINEERS  

    researchmap

  • Levitation Control of a Bearingless Slice Motor Using Eddy Current Displacement Sensors Installed Below the Rotor Invited International journal

    Ren YANG, Zeqiang HE, Naohiro SUGITA, Tadahiko SHINSHI

    J20   2023.8

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：THE JAPAN SOCIETY OF MECHANICAL ENGINEERS  

    researchmap

  • Bearingless Slice Motors with PM-free Rotor for Disposable Centrifugal Blood Pumps Invited Reviewed International journal

    Tadahiko SHINSHI, Zeqiang HE, Ren YANG, Naohiro SUGITA

    Proceedings of 18th ISMB   57 - 60   2023.7

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • 微細磁気パターン一括転写における ネオジム磁石の磁気特性と着磁結果の関係 Invited

    永井 慧大, 杉田 直広, 進士 忠彦

    第35 回「電磁力関連のダイナミクス」シンポジウム講演論文集   1128 - 131   2023.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：第35 回「電磁力関連のダイナミクス」シンポジウム実行委員会  

    researchmap

  • 低周波超音波導入のための医療用小形超音波トランスデューサの開発 Invited

    山本真也, 冨岡圭太, 杉田直広, 進士忠彦

    第35回バイオエンジニアリング講演会アブストラクト集   ( No. 23-3 )   2023.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • ロータ下方に配置した渦電流変位センサによるベアリングレス スライスモータの径方向変位測定 Invited

    YANG Ren, 何 沢強, 杉田直広, 進士 忠彦

    第35 回「電磁力関連のダイナミクス」シンポジウム講演論文集   172 - 173   2023.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：「電磁力関連のダイナミクス」シンポジウム実行委員会  

    researchmap

  • FABRICATION OF A MOVING-COIL-TYPE PDMS-BASED MEMBRANE ELECTROMAGNETIC MICRO-ACTUATOR BY DOUBLE-SIDED SCREEN PRINTING TECHNOLOGY Invited Reviewed International journal

    Chao QI, Naohiro SUGITA, Tadahiko SHINSHI

    Proceedings of Transducers 2023   1954 - 1957   2023.6

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • INFLUENCE OF PERMANENT MAGNETIC PROPERTIES ON MAGNETIC PATTERN TRANSFER FOR MAGNETIC MEMS Invited Reviewed International journal

    Keita Nagai, Naohiro Sugita, Tadahiko Shinshi

    Proceedings of Transducers 2023   2161 - 2164   2023.6

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • マイクロバブル検出における照射音波の空間分布の影響 Invited

    AN Junseok, 杉田直広, 進士忠彦

    第35回バイオエンジニアリング講演会アブストラクト集   ( No. 23-3 )   2023.6

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • Nonlinear coupling between radial and axial vibrations during single-axis acoustic levitation in mid-air Invited Reviewed International journal

    Naohiro Sugita, Taichi Oshino, Tadahiko Shinshi

    INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES   246   2023.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijmecsci.2023.108159

    Web of Science

    researchmap

  • 気泡クラウドの連成振動系における非線形固有値解析 Invited

    杉田直広, 進士忠彦

    第28回計算工学講演会論文集   E-04-03   2023.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：第28回計算工学講演会 実行委員会  

    researchmap

  • 腸呼吸用モック回路の開発 Invited

    渡部 遼, 杉田 直広, 進士 忠彦

    日本機械学会 関東学生会第 62 回学生員卒業研究発表講演会講演論文集   434   2023.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • マイクロバブルを用いた超音波イメージングにおけるビームパターニングの影響 Invited

    AN Junseok, 杉田 直広, 進士 忠彦

    日本機械学会 関東学生会第 62 回学生員卒業研究発表講演会講演論文集   442   2023.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • Low-Cost and Compact Disposable Extracorporeal Centrifugal Blood Pump Utilizing a Homopolar Bearingless Switched Reluctance Slice Motor Invited Reviewed International journal

    Ren Yang, Zeqiang He, Naohiro Sugita, Tadahiko Shinshi

    IEEE ACCESS   11   24353 - 24366   2023.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1109/ACCESS.2023.3254546

    Web of Science

    CiNii Research

    researchmap

  • SURVEY OF PERMANENT MAGNET FOR A LASER-ASSISTED HEATING MAGNETIZATION TO GENERATE DESIGNED SURFACE MAGNETIC FLUX DENSITY DISTRIBUTION FOR MAGNETIC MEMS DEVICES Invited Reviewed International journal

    Keita Nagai, Naohiro Sugita, Tadahiko Shinshi

    2022 21ST INTERNATIONAL CONFERENCE ON MICRO AND NANOTECHNOLOGY FOR POWER GENERATION AND ENERGY CONVERSION APPLICATIONS, POWERMEMS   232 - 233   2022.12

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/PowerMEMS56853.2022.10007554

    Web of Science

    researchmap

  • A MAGNETIC ACTUATOR USING PLD-MADE FEPT THICK FILM AS A PERMANENT MAGNET AND MEMBRANE MATERIAL FOR BIDIRECTIONAL MICROPUMPS Invited Reviewed International journal

    Chao Qi, Keita Nagai, Ming Ji, Yu Miyahara, Naohiro Sugita, Tadahiko Shinshi, Masaki Nakano, Chiaki Sato

    2022 21ST INTERNATIONAL CONFERENCE ON MICRO AND NANOTECHNOLOGY FOR POWER GENERATION AND ENERGY CONVERSION APPLICATIONS, POWERMEMS   309 - 310   2022.12

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.1109/PowerMEMS56853.2022.10007558

    Web of Science

    researchmap

  • 2Pb5-7 Piezoelectric-based compact transducer for low-frequency ultrasound enhanced transdermal drug delivery Invited International journal

    Tomioka Keita, Yamamoto Shinya, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   43   299 - 7   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.43.0_2pb5-7

    CiNii Research

    researchmap

  • 磁気マイクロアクチュエータに向けたレーザ局所加熱を利用する 微細多極着磁法における永久磁石材料の探索 Invited

    永井 慧大, 杉田 直広, 進士 忠彦

    第31回MAGDA コンファレンス講演論文集   623 - 624   2022.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本AEM学会  

    researchmap

  • Pump Performance of Disposable Extracorporeal Centrifugal Blood Pump Utilizing Bearingless Switched Reluctance Motor Invited International journal

    Ren YANG, Zeqiang HE, Naohiro SUGITA, Tadahiko SHINSHI

    Abstract of the 7th International Symposium on Biomedical Engineering (ISBE2022)   113   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • A Heteropolar Bearingless Slice Motor with PM-free Rotor for Disposable Centrifugal Blood Pump Invited Reviewed International journal

    Zeqiang He, Naohiro Sugita, Tadahiko Shinshi

    Proc. of the 9th Intl. Conf. of Asian Society for Precision Engg. and Nanotechnology (ASPEN 2022)   142 - 144   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.3850/978-981-18-6021-8

    researchmap

  • Application of Ultrasound Cavitation and Bubble Dynamics in Medical Diagnosis and Treatment Invited International journal

    Naohiro Sugita, Tadahiko Shinshi

    Abstract of the 7th International Symposium on Biomedical Engineering (ISBE2022)   A2   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Effect of Vibration Mode of Linear Array Transducer on Sound Scattering Coefficient from Microbubbles Invited International journal

    Junsyou KANASHIMA, Junseok AN, Naohiro SUGITA, Tadahiko SHINSHI

    Abstract of the 7th International Symposium on Biomedical Engineering (ISBE2022)   147   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Fabrication of Flexible Coil on PDMS for MEMS-based Electromagnetic Membrane Actuator Invited Reviewed International journal

    Chao Qi, Atsushi Nakazato, Naohiro Sugita, Tadahiko Shinshi

    Proc. of the 9th Intl. Conf. of Asian Society for Precision Engg. and Nanotechnology (ASPEN 2022)   571 - 572   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.3850/978-981-18-6021-8

    researchmap

  • MEMS-based Magnetic Actuators Using Thick-film FePt Permanent Magnet for Micropumps Invited

    Chao Qi, Keita Nagai, 紀 明, 宮原 悠, Naohiro Sugita, TADAHIKO SHINSHI, 中野 正基, Chiaki Sato

    577 - 578   2022.11

    　More details

    Language：English   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Fine Magnetic Pattern Transferred on Nd-Fe-B Magnets Using High Heat-resistant Nd-Fe-B Magnets Invited Reviewed International journal

    Keita NAGAI, Naohiro SUGITA, Tadahiko SHINSHI

    Proc. of the 9th Intl. Conf. of Asian Society for Precision Engg. and Nanotechnology (ASPEN 2022)   470 - 472   2022.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    DOI： 10.3850/978-981-18-6021-8

    researchmap

  • Piezoelectric-based compact ultrasound transducer for cavitation assisted transdermal drug delivery Invited Reviewed International journal

    13002   2022.10

    　More details

    Language：English  

    CiNii Research

    researchmap

  • A Disposable Electromagnetic Bi-Directional Micropump Utilizing a Rotating Multi-Pole Ring Magnetic Coupling Invited Reviewed International journal

    Chao Qi, Naohiro Sugita, Tadahiko Shinshi

    MICROMACHINES   13 ( 10 )   1565   2022.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/mi13101565

    Web of Science

    researchmap

  • Experiment and Analysis of Radial Stiffness of a Single-Axis Acoustic Levitator Invited Reviewed International journal

    Naohiro Sugita, Taichi Oshino, Tadahiko Shinshi

    2022.9

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • 超音波リニアアレイの駆動位相操作によって励振された造影剤気泡の 高次振動モードの音響減衰計測 Invited

    金島 潤昇, 杉田 直広, 進士 忠彦

    日本混相流学会 混相流シンポジウム 2022 講演論文集   2022.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本混相流学会  

    researchmap

  • 経皮ドラッグデリバリーのための薄型超音波トランスデューサ を用いたキャビテーション発生 Invited

    冨岡 圭太, 杉田 直広, 進士 忠彦

    日本混相流学会 混相流シンポジウム 2022 講演論文集   2022.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本混相流学会  

    researchmap

  • Low-frequency piezoelectric-based ultrasound transducer for cavitation yield on biomaterial surfaces Invited International journal

    Naohiro. Sugita, Keita. Tomioka, T. Shinshi

    2022.8

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • A Novel Heteropolar Bearingless Slice Motor with a PM-free Rotor for a Centrifugal Blood Pump application Invited Reviewed International journal

    Zeqiang He, Jianpeng Zhong, Naohiro Sugita, Tadahiko Shinshi

    MIPE2022 Proceedings   D3-1-06   2022.8

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：JSME-IIP/ASME-ISPS  

    researchmap

  • Experiment and modelling of cantilever-based electromagnetic energy harvester driven by direct impact of spherical ball Invited Reviewed International journal

    Naohiro Sugita, Makoto Kine, Dong Han, Tadahiko Shinshi

    MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS   28 ( 8 )   1911 - 1923   2022.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s00542-022-05333-5

    Web of Science

    researchmap

  • Fabrication of Micro Halbach Arrays in a Monolithic Ring Magnet by Laser-Assisted Heating Magnetization Invited Reviewed International journal

    Keita Nagai, Yohei Hamaoka, Naohiro Sugita, Tadahiko Shinshi

    26 - 28   2022.6

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • A Disposable Electromagnetic Micropump for Oscillatory-flow PCR Microfluidic System Invited Reviewed International journal

    Chao Qi, Naohiro Sugita, Tadahiko Shinshi

    41 - 42   2022.6

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • 定在波音響浮揚における支持剛性の非線形特性 Invited

    杉田 直広, 押野 太一, 進士 忠彦

    第３４回「電磁力関連のダイナミクス」シンポジウム論文集   ( No. 22-7 )   11B1 - 2   2022.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • ネオジム磁石への微細磁気パターン一括転写における着磁率の検討 Invited

    永井 慧大, 濱岡 陽平, 杉田 直広, ChiuWan-Ting, 細田 秀樹, 進士 忠彦

    第３４回「電磁力関連のダイナミクス」シンポジウム論文集   ( No. 22-7 )   12B4 - 2   2022.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • Number concentration dependence of ultrasonic disruption ratio of diameter-sorted microcapsules Invited Reviewed International journal

    Junsyou Kanashima, Naohiro Sugita, Tadahiko Shinshi

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE   236 ( 4 )   557 - 565   2022.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1177/09544119211070343

    Web of Science

    researchmap

  • ネオジム磁石に対する改良型レーザアシスト加熱微細多極着磁法の研究 Invited

    永井 慧大, 濱岡 陽平, 杉田 直広, 進士 忠彦

    精密工学会学術講演会講演論文集   2022S ( C106 )   235 - 236   2022.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：公益社団法人 精密工学会  

    マイクロモータの実現に不可欠なネオジム磁石の微細多極着磁法の研究を進めている．現在までに，ネオジム磁石を一様磁場中に設置，レーザビーム走査により局所加熱することで，磁石の保磁力を低下させ，加熱部の着磁を実現する方法を開発している．本報では，着磁用ネオジム磁石を，目的の磁気パターンを施されたSmCo磁石上に設置し，分布磁場を与えることで，一様磁場中よりも着磁率を向上する方法を提案，検証したので報告する．

    DOI： 10.11522/pscjspe.2022s.0_235

    CiNii Research

    researchmap

  • 定在波音響浮揚系に対する動的安定化についての研究 Invited

    押野 太一, 杉田 直広, 進士 忠彦

    関東学生会第 61 回学生員卒業研究発表講演会予稿集   703   2022.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • 球形気泡群による散乱音場の定式化と非線形固有値解析 Invited

    杉田 直広, 金島 潤昇, 進士 忠彦

    キャビテーションに関するシンポジウム（第20回）講演論文集   2021.12

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Ultrasound Cavitation on Soft Material Induced by Dual-frequency Acoustic Resonances Invited International journal

    Naohiro Sugita, Taichi Oshino, Tadahiko Shinshi

    2021.12

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • A Disposable Electromagnetic Micropump for Rapid and High throughput Point of care PCR T ests Invited International journal

    Chao Qi, Naohiro Sugita, Tadahiko Shinshi

    2021.12

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Estimation of the Dynamic Parameters of the Bearings in a Flexible Rotor System Utilizing Electromagnetic Excitation by a Built-In Motor Invited International journal

    Yinsi Chen, Ren Yang, Naohiro Sugita, Jianpeng Zhong, Junhong Mao, Tadahiko Shinshi

    ACTUATORS   11 ( Issue 1 )   1   2021.12

    　More details

  • ネオジム磁石に対する微細磁気パターンの転写 Invited

    濱岡陽平, 永井慧大, 杉田直広, 進士忠彦

    日本機械学会第12回マイクロ・ナノ工学シンポジウム予稿集   ( No. 21-48 )   09A3-32MN2-6   2021.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • ネオジムリング磁石の多極ハルバッハ配列着磁 Invited

    永井 慧大, 杉田 直広, 進士 忠彦

    日本機械学会第12回マイクロ・ナノ工学シンポジウム予稿集   ( No. 21-48 )   2021.11

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：日本機械学会  

    researchmap

  • 1Pb5-6 Effect of Number Concentration of Contrast Agent Microbubbles in a Microchamber on Shell Disruption Invited International journal

    kanashima Junsyou, Sugita Naohiro, Shinshi Tadahiko

    Proceedings of Symposium on Ultrasonic Electronics   42   n/a   2021.10

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.42.0_1pb5-6

    CiNii Research

    researchmap

  • Generation and Control of Ultrasonic Cavitation on Soft Material by Dual-frequency Acoustic Resonances Invited International journal

    Naohiro Sugita, Taichi Oshino, Tadahiko Shinshi

    2021.10

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Identification of Bearing Dynamic Parameters and Unbalanced Forces in a Flexible Rotor System Supported by Oil-Film Bearings and Active Magnetic Devices Invited Reviewed International journal

    Yinsi Chen, Ren Yang, Naohiro Sugita, Junhong Mao, Tadahiko Shinshi

    ACTUATORS   10 ( 9 )   216   2021.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/act10090216

    Web of Science

    researchmap

  • Experimental study of selective disruption of polydisperse microcapsule population utilizing focused ultrasound Invited

    Junsyou Kanashima, Naohiro Sugita, Tadahiko Shinshi

    日本混相流学会 混相流シンポジウム 2021 講演論文集   2021.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Cavitation generation on soft materials induced by an acoustic resonator with a hemispherical cavity structure Invited

    Naohiro Sugita, Taichi Oshino, Haku En, TADAHIKO SHINSHI

    日本混相流学会 混相流シンポジウム 2021 講演論文集   2021.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • ネオジム磁石に対するサマコバ磁石の微細磁気パターンの転写 Invited

    濱岡 陽平, 杉田 直広, 進士 忠彦

    第33回「電磁力関連のダイナミクス」シンポジウム論文集   217 - 218   2021.5

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：電気学会  

    researchmap

  • Experimental analysis of number concentration and disruption rate of two-dimensionally distributed microcapsules Invited

    SUGITA Naohiro, SHINSHI Tadahiko

    Transactions of the JSME (in Japanese)   87 ( 895 )   20-00193 - 20-00193   2021.3

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Society of Mechanical Engineers  

    Disruption of gas-filled microcapsules under pulsed ultrasound irradiation is experimentally studied. The goal of this study is to evaluate the disruption rate of the polymer-shelled microcapsules as a function of the mean number concentration of the microcapsule population. In the present study, we defined the disruption of a microcapsule as decapsulation of the shell layer followed by exposure of an internal gas bubble, growing to visually detectable size through mass diffusion. An experimental setup has been designed to sonicate two-dimensionally dispersed microcapsules in a planar microchamber. Pulsed ultrasound at 1 MHz is irradiated normal to the chamber from a planar ultrasound transducer. Pure water and glycerol aqueous solution of 30 wt. % were used as the dispersion media. Image processing of the recorded microscopic images yields capsule size distribution and local concentration distribution defined as an inverse of the occupied area of the capsule position (Voronoi area). The mean number concentration is controlled over a wide range from 5 to 200 capsules/mm2, while the mean capsule diameter is controlled between 25 and 40 μm regardless of the concentration. The disruption rate is evaluated comparing the number of disrupted microcapsules (gas bubbles) and the total number of microcapsules in the target area of the ultrasound irradiation. The disruption rate turned out to decrease with the mean concentration and is inversely proportional to the mean concentration for the particular case of the two-dimensional spatial distribution.

    DOI： 10.1299/transjsme.20-00193

    CiNii Research

    researchmap

    Other Link： https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19K23484/

  • Nonlinear resonance type electromagnetic vibration energy harvester excited by an impact ball Invited Reviewed International journal

    Naohiro SUGITA, Makoto KINE, Dong HAN, Tadahiko SHINSHI

    Abstract of The 15th International Conference on Motion and Vibration   ( 10065 )   1 - 8   2020.12

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：The Japan Society of Mechanical Engineers  

    researchmap

  • Nonlinear resonance of a ball-impact electromagnetic energy harvester for low frequency vibration Invited International journal

    Naohiro Sugita, Makoto Kine, Dong Han, Tadahiko Shinshi

    International Joint Symposium 2020,Program and Abstracts   O - 14   2020.12

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Numerical Analysis of Superharmonic Resonance in Electromagnetic Vibration Energy Harvester with Ball Impacts Invited

    SUGITA Naohiro, KINE Makoto, HAN Dong, SHINSHI Tadahiko

    The Proceedings of the Dynamics & Design Conference   2020 ( No. 20-11 )   135   2020.8

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japan Society of Mechanical Engineers  

    The superharmonic resonance of a cantilever beam subject to mechanical ball impacts is investigated numerically for potential vibration energy harvesting. In our device, a multipole magnet array attached on the cantilever moves above a planar coil array fixed on the baseplate of the device, leading to power generation through electromagnetic induction. In the numerical model, the cantilever is assumed to be a single DOF damped mass-spring system, which is coupled with the translational motion of a point mass through the classical collision model. The Fourier amplitudes of the cantilever’s displacement have been obtained and compared with the experimental results. It is found that the numerical solution of the superharmonic components shows quantitative agreement with the experiment in the low-frequency range associated with human-induced motions. The excitation region of the superharmonics has been represented as a function of the excitation frequency and the gap distance of the ball motion.

    DOI： 10.1299/jsmedmc.2020.135

    CiNii Research

    researchmap

  • 超音波による中空マイクロカプセルの破壊における粒子数濃度の影響 Invited

    杉田 直広, 進士 忠彦

    第67回応用物理学会学術講演会 講演予稿集   15p-D305-8   01 - 145   2020.3

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：応用物理学会  

    researchmap

  • Effect of number concentration on microcapsule disruption under ultrasound irradiation Invited Reviewed International journal

    Sugita Naohiro, Shinshi Tadahiko

    JSAP Annual Meetings Extended Abstracts   2020.1   436 - 436   2020.2

    　More details

    Language：Japanese   Publisher：The Japan Society of Applied Physics  

    DOI： 10.11470/jsapmeeting.2020.1.0_436

    CiNii Research

    researchmap

  • 粒径制御したマイクロカプセルの超音波崩壊に関する実験 Invited

    金島潤昇, 杉田直広, 進士忠彦

    日本混相流学会混相流シンポジウム2020講演論文集   2020

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

    researchmap

  • Non-resonant type electromagnetic micro energy harvester using collision of steel ball Invited

    KINE Makoto, HAN Dong, SUGITA Naohiro, SHINSHI Tadahiko, KADOTA Shogo

    The Proceedings of the Symposium on the Motion and Vibration Control   2019.16 ( No. 19-310 )   C307   2019.12

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japan Society of Mechanical Engineers  

    Previously we developed a vibration-based micro electromagnetic energy harvester employing a 16-poles thin magnet plate and a high-aspect-ratio spiral micro array coil. However, how to scavenge ambient energy efficiently from vibration sources at low frequency has been identified as a critical challenge. To address this challenge, we propose a micro energy harvester able to convert the applied low-frequency vibration up to a high-frequency vibration by mechanical collision. Upon excitation, the steel ball within the guideway periodically strikes a cantilever at one end of the guideway, allowing the multi-pole magnet suspended on the cantilever to vibrate with higher frequencies. After the explanation of the working principle, a proof-of-concept prototype is fabricated and tested.

    DOI： 10.1299/jsmemovic.2019.16.c307

    CiNii Research

    researchmap

  • Development of Simulator on Rotational Control for a Switched Reluctance type Bearingless Motor for a Centrifugal Blood Pump Invited

    KIMURA Soh, YANG Ren, SUGITA Naohiro, SHINSHI Tadahiko

    The Proceedings of the Symposium on the Motion and Vibration Control   2019.16 ( No. 19-310 )   B303   2019.12

    　More details

    Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japan Society of Mechanical Engineers  

    Recent clinical results show that implantable centrifugal blood pumps (CBP) utilizing magnetic or hydrodynamic bearings are superior to those using contact bearings in terms of durability, thrombus formation and hemolysis. Magnetic bearing technology is also expected to be used in extracorporeal disposable CBPs. However, the use of NdFeB magnets in the rotor of the disposable part is expensive, and this needs to be addressed. Our research group has developed a switched reluctance type bearingless motor (SRBELM) that doesn’t use NdFeB magnet in the disposable part. However, the generated torque of the SR-BELM has not been sufficient for the pump. To improve the rotation controller, a torque simulator of our SR-BELM system is designed. The simulator considering self-inductance and torque coefficient that change with the rotational angle can reproduce the previous experimental results.

    DOI： 10.1299/jsmemovic.2019.16.b303

    CiNii Research

    researchmap

  • Disruption of Polymer Microcapsules in a narrow gap under 1 MHz Ultrasound Irradiation Invited International journal

    Naohiro Sugita, Tadahiko Shinshi

    Abstracts of The 4th International Symposium on Biomedical Engineering   150 - 151   2019.11

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    researchmap

  • Experiment and modeling of translational dynamics of an oscillating bubble cluster in a stationary sound field Invited Reviewed International journal

    Sugita Naohiro

    Ultrasonics   Vol. 77 ( 77 )   160 - 167   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ultras.2017.01.026

    Web of Science

    CiNii Research

    researchmap

  • Modeling of Interaction between an Bubble Oscillation and an Elastic Wall with Finite Wall Thickness Invited International journal

    HEBIGUCHI Hikari, SUGITA Naohiro, SUGIURA Toshihiko

    The Proceedings of Conference of Kanto Branch   2017.23   714   2017

    　More details

    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    DOI： 10.1299/jsmekanto.2017.23.714

    CiNii Research

    researchmap

  • Nonlinear normal modes and localization in two bubble oscillators Invited Reviewed International journal

    Sugita Naohiro

    Ultrasonics   Vol. 74 ( 74 )   174 - 185   2016.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ultras.2016.10.008

    Web of Science

    CiNii Research

    researchmap

  • 1P4-6 The secondary Bjerknes force on a spherical bubble cluster in a periodic pressure field Invited Reviewed International journal

    Sugita Naohiro, Sugiura Toshihiko

    Proceedings of Symposium on Ultrasonic Electronics   36   _1P4-6-1_ - _1P4-6-2_   2015.11

    　More details

    Language：English   Publisher：Institute for Ultrasonic Elecronics  

    DOI： 10.24492/use.36.0__1p4-6-1_

    CiNii Research

    researchmap

  • 349 Nonlinear Normal Modes in Acoustically Coupled Tandem Microbubbles Invited Reviewed International journal

    SUGITA Naohiro, SUGIURA Toshihiko

    Dynamics and Design Conference : D & D   2014   "349 - 1"-"349-9"   2014.8

    　More details

    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    Under an ultrasound field, a microbubble oscillates in volume due to the pressure disturbance. Nonlinear ultrasounds scattered from oscillating microbubbles have been applied to ultrasound imaging. Making use of the oscillation of microbubbles, a small pore of the order of micrometers can be produced on a biological cell. In the sonoporation technique, drugs or DNAs are transported into the biological cell from the small pore. In this study, we focuses on the nonlinear dynamics of tandem microbubbles, and investigates their coupling oscillation using a perturbation method. The coupling term is introduced into a set of coupled Rayleigh-Plesset equations in a form of an additional pressure term. Expanding the equations of motion up to their cubic terms, weakly nonlinear solutions are obtained using the method of multiple scales. An analytically obtained nonlinear normal modes, which describes amplitudes of a freely oscillating bubble as a function of frequencies, shows that the in-phase oscillatory mode gets instability and bifurcated to nonlinear normal modes. Furthermore, the frequency response curve obtained in the analysis shows that a nonlinear localization of amplitudes resulting from the nonlinear normal modes, where the amplitude of a microbubble is several times larger than the other one, even though the two bubbles have exactly the same radii. However, after the isolation distance between the bubbles exceeds a critical value, the bifurcated in-phase oscillatory mode gets stable again, which gives rise to disappearing of the nonlinear normal modes. In conclusion, a coupled oscillatory system of tandem bubbles has nonlinear localized modes due to the weakly coupling acoustic radiation.

    CiNii Books

    CiNii Research

    researchmap

  • J-1-6-124 Boundary Element Study on Nonlinear Oscillations of a Microbubble in an Ultrasound Field Invited Reviewed International journal

    SUGITA Naohiro, SUGIURA Toshihiko

    Dynamics and Design Conference : D & D   2013   "124 - 1"-"124-9"   2013.8

    　More details

    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    Nonlinear socillation of a single microbubble under an ultrasound field is numerically investigated using the boundary element method (BEM) in the three dimensional axisymmetric coordinates. BEM basically is used to solve a Laplace's equation composed of a harmonic function. For bubble dynamics, the flow ambient the bubble is assumed to be potential flow in order to introduce a velocity potential, which obeys the Laplace's equation in the flow region. Using the Green's theorems, the Laplace's equation is readily transformed to a boundary integral equations, finally leading to an algebraic equation system. Solving the equation system every time-step and evolving the boundary in terms of Lagrange point of view, mechanical response of the bubble to the pressure field is obtained. The results are discussed in a sence of nonlinear oscillation.

    CiNii Books

    CiNii Research

    researchmap

  • 332 Parametric Instability of a Microbubble in Ultrasound Field Invited International journal

    FUJIWARA Mitsutoshi, SUGIURA Toshihiko, SUGITAI Naohiro

    Dynamics and Design Conference : D & D   2012   54 - _332-10_   2012.9

    　More details

    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    It has recently observed that microbubbles coated with a lipid monolayer on their surface oscillate non-spherically under driving acoustic pressure. In addition, the oscillations have been proved to make substantial effects, in particular, on acoustic scatterings, collapse phenomena, and life spans of the bubbles. However, it is so complicated to take mechanical properties of a lipid coating into consideration that further study focusing on the lipid coating is needed. Notably, surface tension varies due to the existence of the lipid coating. In this study, firstly we investigate parametrical instability of a free gas bubble oscillating spherically. In general, the coupling of the radial oscillation and the surface oscillation is one-way coupling so that the two systems exchange energy each other when the surface oscillations are parametrically excited. Secondly, how the effective surface tension changes the unstable regions in which surface oscillations are parametrically excited is discussed, using numerical simulation.

    DOI： 10.1299/jsmedmc.2012._332-1_

    CiNii Books

    CiNii Research

    researchmap

▼display all

MISC

Presentations

  • 超音波霧化と低温プラズマイオン化を用いた溶液中の微量薬剤分析

    戸谷亮太, 太原誠也, 清水祐哉, 福智魁, 八井田朱音, 守岩友紀子, 杉田直広, 東海林敦, 沖野晃俊

    第86回分析化学討論会  2026.5 

    　More details

    Language：Japanese   Presentation type：Poster presentation  

    Venue：福岡県  

    researchmap

  • Piezoelectric-based compact ultrasound transducer for cavitation assisted transdermal drug delivery International conference

    Naohiro Sugita, Tadahiko Shinshi

    International workshop on piezoelectric materials and applications in actuators 2022  2022.10 

    　More details

    Language：English   Presentation type：Oral presentation (invited, special)  

    researchmap

  • バースト超音波霧化を用いた標準溶液試料中の元素分析

    八井田朱音, 戸谷 亮太, 府川大晟, 守岩 友紀子, 杉田 直広, 東海林 敦, 沖野 晃俊

    プラズマ分光分析研究会 2026筑波セミナー  2026.7 

    　More details

    Language：Japanese   Presentation type：Poster presentation  

    Venue：茨城県つくば市  

    researchmap

  • パルス超音波噴霧を用いた微少量溶液試料中の元素分析法

    八井田朱音, 戸谷 亮太, 守岩 友紀子, 杉田 直広, 東海林 敦, 沖野 晃俊

    第86回分析化学討論会  2026.5 

    　More details

    Language：Japanese   Presentation type：Poster presentation  

    Venue：福岡県久留米市  

    researchmap

  • マイクロバブルを利用した医用超音波技術

    杉田直広

    東京医科歯科大学第4回 MeetUp  2022.9 

    　More details

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

    Venue：東京  

    researchmap

Industrial property rights

  • 超音波照射器

    杉田直広, 進士忠彦, 山本真也, 冨岡 圭太

    　More details

    Applicant：国立大学法人東京科学大学

    Application no：特願2023-178036  Date applied：2023.10

    Announcement no：特開2025-068259  Date announced：2025.4

    researchmap

Awards

  • 第3回 社会変革チャレンジ賞

    2026.7   東京科学大学イノベーションデザイン機構  

    　More details

  • Young Researchers Presentation Award

    2021.12   第６回生体医歯工学共同研究拠点国際シンポジウム  

    　More details

  • オーディエンス表彰

    2013.8   日本機械学会機械力学・計測制御部門  

    　More details

  • 混相流シンポジウム2012 学生優秀講演賞

    2012.10  

    　More details

Research Projects

  • 超音波局在顕微法のための次世代造影剤に関する基礎検討

    Grant number：26K07533  2026.4 - 2029.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    杉田 直広

    　 More details

    Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）

    researchmap

  • Interaction model for randomly distributed very small scatteres from a view point of causality

    Grant number：25K15150  2025.4 - 2030.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    　 More details

    Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）

    researchmap

  • 照射音波の空間パターニングによる血管内マイクロバブルの検出

    Grant number：23K13276  2023.4 - 2026.3

    日本学術振興会  科学研究費助成事業  若手研究

    杉田 直広

    　 More details

    Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）

    本研究は，超音波を用いた超解像イメージング技術の実現を目的として，空間的な干渉縞を有する超音波を利用し，超音波検査で用いられる造影剤に含まれる個々のマイクロバブルを高速かつ高精度に検出する手法の開発を行う．
    令和5年度（初年度）には，バブルの振動応答を考慮した超音波イメージングの数値シミュレーション手法を開発し，干渉縞の異なる複数の超音波を組み合わせることで，従来の平面波では検出されなかったバブルを新たに検出し，検出率が向上することを確認した．さらに，密集状態にある複数のバブルからの散乱波が干渉して画像上で重なって検出される場合においても，それらを分離して検出できる可能性があることを数値的に示した．
    令和6年度は，これらの成果を踏まえて，静止流体中のマイクロバブルに対する検出性能の実験的検証を実施した．その結果，信号対雑音比が低い条件下では，バブル間の相互作用により検出数が増加し，数値シミュレーションによる予測と同様の傾向が確認された．一方で，検出位置の精度が低下する可能性も示唆された．また，組織からの高調波がノイズとなる問題に対し，造影超音波画像とBモード画像を用いてノイズ成分を抑制する画像処理手法を新たに開発し，バブル由来の信号を強調することで検出精度の向上を図った．その有効性は，体動を模擬した揺動環境下での検証実験により確認された．令和7年度には，流れ場中における検出精度や分離検出手法の実証を進める予定である．

    researchmap

  • Study of sound wave irradiation method to a bubble cloud by ultrasound phased array

    Grant number：21K14073  2021.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

    Sugita Naohiro

    　 More details

    Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）

    For the field of ultrasound treatment and diagnosis technology utilizing microbubbles, we proposed a sound irradiation method with a single-frequency ultrasound to induce multiple vibration responses within a bubble cloud. Through a combination of numerical analysis and experimental validation, we established the underlying principle. To achieve this, we employed a technique where the polarity of the voltage applied to each element of the ultrasonic linear array was selectively reversed. This manipulation led to the formation of distinct spatial patterns in the irradiated sound waves. By varying the irradiation patterns, we observed changes in the vibration modes exhibited by the bubble cloud.The intensity and spatial distribution of the scattered sound field were altered accordingly.

    researchmap

  • Localized oscillation and resonance of microbubbles as drug carrier agents

    Grant number：19K23484  2019.8 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Research Activity Start-up

    SUGITA Naohiro

    　 More details

    Grant amount：\2860000 （ Direct Cost: \2200000 、 Indirect Cost：\660000 ）

    The disruption rate of the polymer-shelled microbubbles (microcapsules) subject to ultrasound irradiation was measured experimentally from optical microscopic observation, which enables one to study bubble cloud oscillation in controlled drug release application. Ultrasonically disrupted microcapsules were optically visualized at high spatial resolution by using a planar micro-chamber. The disruption rate was calculated based on particle analysis of the recorded image as a function of size distribution and the number concentration of the microcapsule cloud.

    researchmap