Faculty Profiles - TSURUTA Kenji

MISC - TSURUTA Kenji

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B-1-15 A Consideration about Influence of Capacitance of Diode under the State of Rectifying Operation at Microwave Frequency

Taniguchi Mamoru, Wagi Teruhiko, Fujimori Kazuhiro, Tsuruta Kenji

Proceedings of the IEICE General Conference 2013 ( 1 ) 15 - 15 2013.3

B-1-26 A Fundamental Investigation of Operating Condition for Highly Efficient RF-DC Conversion Circuit by Using Genetic Algorithm

Ota Kosuke, Kondo Yoshihiro, Fujimori Kazuhiro, Tsuruta Kenji

Proceedings of the IEICE General Conference 2013 ( 1 ) 26 - 26 2013.3

第一原理計算に基づくアルミナ粒界における空孔形成と拡散挙動の解析

小川貴史, 桑原彰秀, FISHER Craig A. J., 森分博紀, 松永克志, 鶴田健二, 北岡諭

日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM) 26th 2013

アルミナ結晶中のらせん転位近傍への不純物偏析:ハイブリッド量子/古典分子動力学解析

浅野立直, 高田和明, 鶴田健二, 藤森和博

日本機械学会計算力学講演会論文集(CD-ROM) 26th 2013

フォノニック結晶レンズのFDTD解析と超音波実験

田所正昭, 羽井佐浩気, 管野祐輔, 藤森和博, 鶴田健二, 深野秀樹

日本機械学会計算力学講演会論文集(CD-ROM) 26th 2013

CNT/GaAsヘテロ太陽電池の第一原理電子状態解析

伊丹雅彦, 鶴田健二, 藤森和博, 深野秀樹

日本機械学会計算力学講演会論文集(CD-ROM) 26th 2013

1602 Design of High-Efficiency/Wideband Transducer for Ultrasonic Wireless Power Transmission System

TOMINAGA Shota, TANDA Koichiro, FUJIMORI Kazuhiro, TSURUTA Kenji, NOGI Sigeji

The Computational Mechanics Conference 2012 ( 25 ) 612 - 613 2012.10

2102 Large Scale Molecular Dynamics Analysis on Stability of Screw Dislocation in Alumina

Takata Kazuaki, Tsuruta Kenji, Fujimori Kazuhiro

The Computational Mechanics Conference 2012 ( 25 ) 174 - 175 2012.10

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

Using large-scale molecular dynamics simulation, we investigate the stability of screw dislocation in α-alumina. Energies of perfect and partial screw dislocations in α-alumina crystal are compared at several temperatures. In the case of screw dislocation results reveal that perfect dislocation in alumina is more stable than partial dislocations. This result is consistent with the experimental observations in that the screw dislocation in alumina is stable against dissociation into partials. We also evaluate the temperature dependence of rigidity modulus of alumina from the stress-distribution calculations.

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2106 Hybrid MC/MD simulation of grain boundary segregation in semiconductor/ceramic materials

SUGAHARA Kazuhito, TAKATA Kazuaki, TSURUTA Kenji, FUJIMORI Kazuhiro

The Computational Mechanics Conference 2012 ( 25 ) 182 - 183 2012.10

Language：Japanese Publisher：The Japan Society of Mechanical Engineers

We demonstrate the effectiveness of a hybrid Monte Carlo (MC)/molecular dynamics (MD) method in analysis of grain-boundary segregation, a long-time phenomenon from the atomistic-simulation point of view. The Σ9 coincidence grain boundary of Si crystal is adopted as a testbed for the method. We find an efficient sampling of hopping diffusion of a vacancy in the system can be achieved, while the internal energy evaluated from the MD runs at the same temperature as the MC simulation includes the structural relaxation of the system at the temperature.

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2113 Electronic states and transport properties in carbon nanotube/GaAs interface using first-principles calculation

ITAMI Masahiko, TSURUTA Kenji, Fujimori Kazuhiro

The Computational Mechanics Conference 2012 ( 25 ) 198 - 199 2012.10

B-9-2 Comparison of the conversion efficiency in a series type and a shunt type RF-DC conversion circuit

Ota Kosuke, Wagi Teruhiko, Fujimori Kazuhiro, Tsuruta Kenji

Proceedings of the IEICE General Conference 2012 ( 2 ) 312 - 312 2012.3

CS-6-5 An Automatic Design for The RF-DC Conversion Circuit by using Genetic Algorithm

Kondo Yoshihiro, Fujimori Kazuhiro, Tsuruta Kenji

Proceedings of the IEICE General Conference 2012 ( 1 ) "S - 23"-"S-24" 2012.3

BCS-1-1 Characteristics of a RF-DC Conversion Circuit using a GaN Diode for Microwave Rectification

WAGI Teruhiko, TAMARU Shoichi, FUJIMORI Kazuhiro, TSURUTA Kenji, NOGI Shigeji, OZAWA Yuichiro, FURUKAWA Minoru, FUJIWARA Teruo

Proceedings of the IEICE General Conference 2012 ( 1 ) "S - 57"-"S-58" 2012.3

C-11-1 Structure and Electronic State on Dislocations in 4H-SiC : Tight-binding and First-principles Simulations

Morisada Tomofumi, Hamasaki Fusanori, Tsuruta Kenji

Proceedings of the IEICE General Conference 2012 ( 2 ) 70 - 70 2012.3

The Conversion efficiency analysis of a shunt form RF-DC conversion circuit with the equivalent circuit parameter of a diode

WAGI Teruhiko, TAMARU Shoichi, KONDO Yoshihoiro, FUJIMORI Kazuhiro, TSURUTA Kenji

111 ( 412 ) 201 - 206 2012.1

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

The device called Rectenna as an antenna for Receive Antenna of radio electric power transmission is used. The RF-DC conversion circuit of high conversion efficiency which is a component of Rectenna cause wireless power transimission of high transmission efficiency. In this paper, The conversion efficiency analysis of RF-DC conversion circuit in change of component oh the diode are investigated to clarify the characteristic of the diode for obtaining highly efficiency conversion circuit.

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超音波無線電力伝送のための高効率なトランスデューサの設計と開発

堀祐貴, 藤森和博, 鶴田健二, 野木茂次

電気学会論文誌Ｃ 132 ( 3 ) 337 - 343 2012

Design and Development of Highly Efficient Transducer for Ultrasonic Wireless Power Transmission System

Yuki Hori, Kazuhiro Fujimori, Kenji Tsuruta, Shigeji Nogi

IEEJ Trans. Electronics, Information and Systems 132 ( 3 ) 337 - 343 2012

Optically-powered voltage-supply-device for effective utilization of optical energy in the fiber-to-the-home network

Hideki Fukano, Takeshi Shinagawa, Kenji Tsuruta

IEEJ Transactions on Electronics, Information and Systems 132 ( 4 ) 495 - 499 2012

Language：English Publisher：Institute of Electrical Engineers of Japan

An optically powered device with using InGaAs-Photodiode has been developed. This study aims to harvest light energy (2.8∼500 μW) from the FTTH (Fiber To The Home) network and to utilize it for operating remote sensors without external energy sources. First, we designed and evaluated the characteristics of the booster circuit and confirmed that it could boost an input voltage of 0.3 V to 3.0 V. Next, we also evaluated the characteristics of InGaAs photodiode and confirmed that it can output a voltage over 0.3 V at 10-μW input light. We demonstrate that a ready-made sensor can be operated with an input optical power as low as 10 μW. © 2012 The Institute of Electrical Engineers of Japan.

DOI： 10.1541/ieejeiss.132.495

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Optically-powered voltage-supply-device for effective utilization of optical energy in the fiber-to-the-home network

Hideki Fukano, Takeshi Shinagawa, Kenji Tsuruta

IEEJ Transactions on Electronics, Information and Systems 132 ( 4 ) 495 - 499 2012

Language：English Publisher：Institute of Electrical Engineers of Japan

DOI： 10.1541/ieejeiss.132.495

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機能元素解析のための大規模有限温度分子動力学シミュレーション

セラミックス 47 ( 7 ) 489 - 493 2012

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