Tsuyoshi Usagawa

J-GLOBAL         Last updated: Nov 9, 2018 at 12:56
 
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Name
Tsuyoshi Usagawa
Affiliation
Kumamoto University
Section
Unregistered
Job title
Professor
Degree
PhD

Profile

Acoustical signal processing and modeling such as binaural hearing model, microphone array systems and speech enhancement, are my major interest. I also have interests on collobration of e-Learning with acoustical signal processing.

He born in 1959 and he got the bachular from Kyushu Insititute of Technology in 1981, and the master degree from Tohoku University in 1983. He got the PhD in Engineering from Tohoku University in 1989.
He joined Kumamoto University in 1983 and he became a professor in 2005 at Kumamoto University.

Research Areas

 
 

Academic & Professional Experience

 
Apr 2016
   
 
Professor, Dean, Faculty of Advanced Science and Technology, Kumamoto University
 
Apr 2014
 - 
Mar 2016
Professor, Vice Dean, Graduate School of Science and Technology, Kumamoto University
 
Jan 2003
 - 
Mar 2016
Professor, Faculty of Engineering, Kumamoto University
 
Apr 2010
 - 
Mar 2014
学長特別補佐, Kumamoto University
 
Apr 2004
 - 
Mar 2010
Director, Center for Multimedia and Information Technologies, Kumamoto University
 

Awards & Honors

 
Mar 1992
Awaya Kiyoshi Award, Acoustical Society of Japan
 
 
Sato Paper Award, Acoustical Society of Japan
 

Misc

 
Luther Alexander Latumakulita, Tsuyoshi Usagawa
ICNC-FSKD 2017 - 13th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery   1309-1314   Jun 2018
© 2017 IEEE. 'Bidik Misi' (BM) is a scholarship from the Government of Indonesia with two criteria: economic need and academic performance. Main candidate targets are those from low economic families. Due to the large number of potential recipient...
Muhammad Bagus Andra, Tsuyoshi Usagawa
2017 International Conference on Advanced Computer Science and Information Systems, ICACSIS 2017   2018-January 198-203   May 2018
© 2017 IEEE. We present a Keyword Spotting (KWS) system for lecture video that uses Deep Convolutional Neural Network (CNN) architecture. The CNN architecture enables us to use lecture video speech data that was taken under a diverse condition as ...
中野裕司, 喜多敏博, 杉谷賢一, 松葉龍一, 久保田真一郎, 宇佐川毅
情報処理学会研究報告(Web)   2018(CLE-24) Vol.2018‐CLE‐24,No.4,1‐5 (WEB ONLY)   Mar 2018
御手洗 宏樹, 清田 佳偉, イルワンシャー, 宇佐川 毅
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117(430) 21-26   Feb 2018
御手洗宏樹, 清田佳偉, IRWANSYAH, 宇佐川毅
電子情報通信学会技術研究報告   117(430(EA2017 93-101)) 21‐26   Feb 2018
久世 尚之, イルワンシャー, 平 紘志郎, 宇佐川 毅
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   117(399) 1-6   Jan 2018
Chenyang Zheng, Tsuyoshi Usagawa
Proceedings of the 11th International Conference on Information and Communication Technology and System, ICTS 2017   2018-January 265-268   Jan 2018
© 2017 IEEE. This study proposes a new method which is short Chinese text classification based on correlation analysis. Through the association rules mining of words in short texts, using correlation groups to build a thesaurus, then repeat modify...
久世尚之, IRWANSYAH, 平紘志郎, 宇佐川毅
電子情報通信学会技術研究報告   117(399(EA2017 84-92)) 1‐6   Jan 2018
Luther Alexander Latumakulita, Tsuyoshi Usagawa
International Journal of Intelligent Engineering and Systems   11 79-90   Jan 2018
© 2018 Intelligent Network and Systems Society. "Bidik Misi" (BM) is a famous scholarship offered by Indonesia Government which has two main qualification aspects: economic needs and academic performance. Since BM scholarship was initiated in 2010...
Fajar Purnama, Tsuyoshi Usagawa, Royyana M. Ijtihadie, Linawati
Proceedings - 2016 IEEE Region 10 Symposium, TENSYMP 2016   24-29   Jul 2016
© 2016 IEEE.E-learning has been widely implemented in educations system. Most higher institutions have applied Learning Management Systems (LMSs) to manage their online courses, with Moodle as one of the most favored LMS. However on the other side...
岩崎 大将, 苣木 禎史, 宇佐川 毅
教育システム情報学会研究報告 = JSiSE research report   30(6) 35-40   Mar 2016
Xiuyuan Qin, 矢田 万美子, 宇佐川 毅
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   115(423) 99-104   Jan 2016
平 紘志郎, 久世 尚之, 宇佐川 毅
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   115(423) 93-98   Jan 2016
Xiuyuan Qin, 矢田 万美子, 宇佐川 毅
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   115(424) 57-62   Jan 2016
平 紘志郎, 久世 尚之, 宇佐川 毅
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報   115(424) 51-56   Jan 2016
平紘志郎, 久世尚之, 宇佐川毅
電子情報通信学会技術研究報告   115(423(US2015 83-107)) 93‐98   Jan 2016
中野裕司, 中野裕司, 中野裕司, 喜多敏博, 喜多敏博, 喜多敏博, 松葉龍一, 松葉龍一, 松葉龍一, WANNOUS Muhammad, 宇佐川毅
教育システム情報学会全国大会講演論文集(CD-ROM)   41st ROMBUNNO.I1‐7   2016
久世尚之, 平紘志郎, 苣木禎史, 宇佐川毅
電気・情報関係学会九州支部連合大会講演論文集(CD-ROM)   68th ROMBUNNO.14-1P-06   Sep 2015
中野裕司, 中野裕司, 中野裕司, 中野裕司, 永井孝幸, 永井孝幸, 永井孝幸, 永井孝幸, 中村泰之, 中村泰之, 稲垣佑亮, MUHAMMAD Wannous, MUHAMMAD Wannous, MUHAMMAD Wannous, 喜多敏博, 喜多敏博, 喜多敏博, 宇佐川毅, 宇佐川毅, 宇佐川毅
情報処理学会研究報告(Web)   2015(CLE-16) VOL.2015-CLE-16,NO.7 (WEB ONLY)   May 2015
田中章悟, 苣木禎史, 宇佐川毅
情報処理学会全国大会講演論文集   76th(4) 4.223-4.224   Mar 2014
富田拓郎, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2014 ROMBUNNO.1-P5-5   Mar 2014
NAKASHIMA Yuhei, MAEKAWA Takahiro, NAGAI Takayuki, KITA Toshihiro, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report. Education technology   113(377) 13-18   Jan 2014
Students' attendance record of classes is necessary to manage the class, however it causes the extra burden of a lecturer as well as loss of lecturing time. An attendance management system using student identification card with 1C chips has been p...
仲島悠平, 前川嵩博, 永井孝幸, 喜多敏博, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   113(377(ET2013 68-91)) 13-18   Jan 2014
富田 拓郎, 苣木 禎史, 宇佐川 毅
日本音響学会研究発表会講演論文集 日本音響学会 編   823-826   2014
鈴木陽一, CUI Zhenglie, 齋藤文孝, 坂本修一, 森本政之, 宇佐川毅, 苣木禎史, 佐藤逸人, 岩谷幸雄, 青木雅彦, 小池宏寿, 高島和博, 鶴秀生, 光枝太一
日本音響学会研究発表会講演論文集(CD-ROM)   2013 ROMBUNNO.1-10-2   Sep 2013
富田拓郎, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2013 ROMBUNNO.1-Q-6   Sep 2013
福田吉真, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2013 ROMBUNNO.2-Q-50   Mar 2013
宇佐川毅, 阿蘇品萌, 苣木禎史, CUI Zheng Lie, 鈴木陽一
日本音響学会研究発表会講演論文集(CD-ROM)   2013 ROMBUNNO.2-Q-31   Mar 2013
富田拓郎, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2013 ROMBUNNO.1-P-27   Mar 2013
萱島信子, 宇佐川毅, TUAN Phan Dinh, ATTALAGE Rahula Anura, 穂積直裕
工学教育国際協力   11 (JA)37-47,(EN)82-90   Mar 2013
萱島 信子, 宇佐川 毅, Tuan Phan Dinh
工学教育国際協力   11 37-47   Mar 2013
NAKANO Hiroshi, HOMMA Riken, MATSUBA Ryuichi, KUBOTA Shinichiro, NAGAI Takayuki, KITA Toshihiro, USAGAWA Tsuyoshi
日本教育工学会研究報告集   2012(5) 77-82   Dec 2012
富田拓郎, 佐保貴哉, 苣木禎史, 宇佐川毅
日本音響学会聴覚研究会資料   42(7) 573-578   Oct 2012
富田拓郎, 佐保貴哉, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2012 ROMBUNNO.2-Q-B15   Sep 2012
齋藤文孝, CUI Z., 佐藤逸人, 森本政之, 苣木禎史, 宇佐川毅, 岩谷幸雄, 坂本修一, 鈴木陽一, 青木雅彦, 高島和博
日本音響学会研究発表会講演論文集(CD-ROM)   2012 ROMBUNNO.3-9-20   Sep 2012
福田吉真, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   112(171(EA2012 54-64)) 49-54   Jul 2012
FUKUDA Yoshimi, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
Technical report of IEICE. EA   112(171) 49-54   Jul 2012
Although some bone conduction actuators whose catalogues show a wide frequency range up to 10 kHz are released on the market, the relationship between loudness and acceleration characteristics is not yet clear. There are several issues which affec...
堂上哲, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   112(66(ET2012 1-11)) 13-18   May 2012
DOUNOUE Satoshi, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report. Education technology   112(66) 13-18   May 2012
Learning Management System(LMS) becomes popular not only for distance learning style but also for blended learning style in various types of educational institutions. Usually teachers who lecture courses responsible to design of quiz, thus then so...
佐保貴哉, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2012 ROMBUNNO.1-1-13   Mar 2012
小野口平, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2012 ROMBUNNO.1-1-12   Mar 2012
福田吉真, 八江優輝, 中原史博, 中谷任徳, 小林甲児, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2012 ROMBUNNO.1-1-7   Mar 2012
MAEDA Setsuo, SAKAGAMI Kimihiro, FUKUSHIMA Akinori, HIRAMATSU Tomotaka, TOI Takeshi, SAKAMOTO Shinichi, USAGAWA Tsuyoshi, OKUBO Tomonao
騒音制御   36(1) 72-76   Feb 2012   [Invited]
喜多敏博, 根本淳子, 上田公代, 宇佐川毅
情報処理学会研究報告(CD-ROM)   2011(4) ROMBUNNO.CE-111,NO.2   Dec 2011
八江優輝, 中原史博, 中谷任徳, 小林甲児, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   111(306(EA2011 82-95)) 49-54   Nov 2011
YAE Yuki, NAKAHARA Fumihiro, NAKATANI Hidenori, KOBAYASHI Koji, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE Technical Report   111(306) 49-54   Nov 2011
Recently, bone conduction actuators which can reproduce the high frequency signal around 10 kHz are released in the market and those are used not only for speech but also music reproduction. However, the detail characteristics of bone conduction a...
喜多 敏博, 根本 淳子, 上田 公代, 宇佐川 毅
研究報告教育学習支援情報システム(CLE)   2011(2) 1-4   Oct 2011
島添真和, 苣木禎史, 宇佐川毅
電気関係学会九州支部連合大会講演論文集(CD-ROM)   64th ROMBUNNO.01-2P-02   Sep 2011
小野口平, 苣木禎史, 宇佐川毅
電気関係学会九州支部連合大会講演論文集(CD-ROM)   64th ROMBUNNO.05-2A-16   Sep 2011
仲島悠平, IJITIHADIE Royyana M., 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   111(213(ET2011 36-46)) 35-40   Sep 2011
NAKASHIMA Yuhei, IJITIHADIE Royyana M., CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   111(213) 35-40   Sep 2011
Sharing learning contents among distributed e-Learning systems is one of important issues to reduce the burden to compose and maintain learning contents. A synchronization method of learning contents from a single server LMS to multiple client LMS...
久保田真一郎, 副島慶人, 川村諒, 杉谷賢一, 武藏泰雄, 永井孝幸, 入口紀男, 右田雅裕, 喜多敏博, 松葉龍一, 辻一隆, 島本勝, 木田健, 宇佐川毅, 中野裕司
学術情報処理研究   (15) 82-88   Sep 2011
佐保貴哉, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2011 ROMBUNNO.1-P-25   Sep 2011
藤澤暁, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2011 ROMBUNNO.1-P-27   Sep 2011
佐保 貴哉, 苣木 禎史, 宇佐川 毅
聴覚研究会資料   41(6) 413-418   Aug 2011
佐保貴哉, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   111(175(EA2011 50-67)) 37-42   Aug 2011
SAHO Atsuya, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   111(175) 37-42   Aug 2011
A binaural hearing assistance system using the frequency domain binaural model on horizontal coordinate has been proposed and it is implemented on a portable device with directional selectivity. However, this system has a front-back confusion. In ...
堂上哲, 苣木禎史, 宇佐川毅
情報処理学会研究報告(CD-ROM)   2011(1) ROMBUNNO.CLE-4,NO.3   Jun 2011
堂上 哲, 苣木 禎史, 宇佐川 毅
研究報告教育学習支援情報システム(CLE)   2011(3) 1-7   May 2011
宇佐川毅, 佐保貴哉, 苣木禎史
電子情報通信学会技術研究報告   111(26(EA2011 1-29)) 89-94   May 2011
USAGAWA Tsuyoshi, SAHO Atsuya, CHISAKI Yoshifumi
IEICE technical report   111(27) 89-94   May 2011
A frequency domain binaural model was proposed as a model of a preliminary function of cocktail party effect, and it estimates a direction of sound source and segregates a specified sound based on a binaural input. This model works based on intera...
USAGAWA Tsuyoshi, SAHO Atsuya, CHISAKI Yoshifumi
IEICE technical report   111(26) 89-94   May 2011
A frequency domain binaural model was proposed as a model of a preliminary function of cocktail party effect, and it estimates a direction of sound source and segregates a specified sound based on a binaural input. This model works based on intera...
T. Usagawa, Y. Chisaki
Principles and Applications of Spatial Hearing   419-435   Jan 2011
© 2011 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. Based on the spatial selectivity using binaural hearing, a binaural hearing assistance system has been proposed using a frequency domain binaural model. This system has a sim...
USAGAWA Tsuyoshi, SAHO Atsuya, CHISAKI Yoshifumi
IEICE technical report   111(28) 89-94   May 2011
A frequency domain binaural model was proposed as a model of a preliminary function of cocktail party effect, and it estimates a direction of sound source and segregates a specified sound based on a binaural input. This model works based on intera...
佐保貴哉, 今村浩二郎, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2011 ROMBUNNO.1-Q-53(E)   Mar 2011
宇佐川毅, 西原稔貴, 苣木禎史
日本音響学会研究発表会講演論文集(CD-ROM)   2011 ROMBUNNO.1-9-1   Mar 2011
苣木禎史, 眞島智久, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2011 ROMBUNNO.1-Q-29(E)   Mar 2011
Shimazoe Masakazu, Chisaki Yoshifumi, Usagawa Tsuyoshi
Record of Joint Conference of Electrical and Electronics Engineers in Kyushu   2011(0) 450-450   2011
両耳補聴システムには,特定の方向の音を強調する指向性補聴器がある。その中には,周囲の音の情報をもとに指向性を変化させるものもある。さらに人間の発する情報を用いることにより,人間の聴覚に近い,両耳補聴システムを構築できると考えた。そこで,複数の人間と会話する状況を想定した場合,対話者の方向へ頭部を回転させるため,人間の発する情報として身体動作である頭部の回転動作に注目した。本報告では,3軸加速度センサを用い頭部回転動作の検出を行い,その情報をもとに両耳補聴システムの指向性制御を行った。結果と...
Onoguchi Taira, Chisaki Yoshifumi, Usagawa Tsuyoshi
Record of Joint Conference of Electrical and Electronics Engineers in Kyushu   2011(0) 337-337   2011
周波数領域両耳聴モデルを小型情報端末に実装した両耳補聴システムにおいて,自発話が強調されてしまうことが問題となっている。そこで自発話を検出し,補聴システムの出力信号中の自発話成分を抑制する手法が必要とされると考える。これまでの報告の中で,矢状面座標系において複数の周波数帯域にまたがる両耳間信号差を入力とするニューラルネットワークを用いることで,正中面においても音源方向推定が可能であることが示されている。本報告では,この手法を,点音源を模擬した特殊な音源により頭部近傍において測定された伝達関...
眞島智久, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   110(285(EA2010 84-96)) 73-78   Nov 2010
MASHIMA Tomohisa, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   110(285) 73-78   Nov 2010
An utterance training system utilizing automatic speech recognition (ASR) was proposed as a computer aided language laboratory system. Performance of the ASR is seriously degraded due to surround noise. A time-frequency masking method utilizing si...
右田雅裕, 杉谷賢一, 久保田真一郎, 武藏泰雄, 永井孝幸, 入口紀男, 喜多敏博, 松葉龍一, 辻一隆, 島本勝, 木田健, 宇佐川毅, 中野裕司
学術情報処理研究   (14) 48-55   Sep 2010
藤澤暁, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2010 ROMBUNNO.3-10-4   Sep 2010
佐保貴哉, 今村浩二郎, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2010 ROMBUNNO.2-P-15   Sep 2010
苣木禎史, 藤澤暁, VAN DUC Nguyen, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2010 ROMBUNNO.2-P-13   Sep 2010
緒方公一, 宇佐川毅
電子情報通信学会技術研究報告   110(81(SP2010 22-34)) 13-18   Jun 2010
OGATA Kohichi, USAGAWA Tsuyoshi
IEICE technical report   110(81) 13-18   Jun 2010
This paper introduces education in signal processing using a learning management system in the Department of Computer Science and Electrical Engineering, Faculty of Engineering, Kumamoto University. There are two classes for a compulsory subject S...
今村浩二郎, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   109(286(EA2009 76-92)) 55-60   Nov 2009
IMAMURA Kojiro, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   109(286) 55-60   Nov 2009
There are many methods to estimate sound source direction based on the binaural input signals in horizontal coordinate where the direction is estimated as an azimuth and an elevation angles. In this coordinates, the meaning of difference in azimut...
久保田真一郎, 杉谷賢一, 武藏泰雄, 中野裕司, 永井孝幸, 入口紀男, 右田雅裕, 喜多敏博, 松葉龍一, 辻一隆, 島本勝, 木田健, 宇佐川毅
学術情報処理研究   (13) 24-31   Sep 2009
冨田美奈子, 河野亮詞, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2009 ROMBUNNO.3-P-18   Mar 2009
宇佐川毅, 苣木禎史
日本音響学会研究発表会講演論文集(CD-ROM)   2009 ROMBUNNO.1-9-19   Mar 2009
長西将弘, 片山泰輔, 栗栖清浩, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2009 ROMBUNNO.3-P-2   Mar 2009
脇坂龍, 常田貴史, 中島栄俊, 石橋孝昭, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2009 ROMBUNNO.3-P-19   Mar 2009
丸山 克也, 戸崎 光宏, 水内 宣夫, 諸井 貴, 滝沢 修, 宇佐川 毅, 末吉 敏則, 入口 紀男
MEDICAL IMAGING TECHNOLOGY   27(2) 91-96   Mar 2009
1.5Tでのプロトン(1H)磁気共鳴(MR)スペクトロスコピーで微小な乳腺腫瘍でのコリン含有合成物(Cho)の検出感度を評価した。MRSにおいて脂肪信号を抑制することによりChoピークを感度よく検出できると考えられた。MRIおよびMRSは648例の患者に対して施行され、1cm以下の乳腺腫瘍は14例(15腫瘍)であった。腫瘍の平均直径は8.7mmであり、組織学的には浸潤性乳管癌(IDC)(n=11)と非浸潤性乳管癌(DCIS)(n=4)を含んでいた。Choピークは3.2ppmで検出され、4例...
石村寿朗, 渡辺惇哉, 苣木禎史, 宇佐川毅
熊本県産学官技術交流会講演論文集   23rd 168-169   2009
Usagawa Tsuyoshi, Tomita Minako, Saon Sharifah Binti
聴覚研究会資料   38(8) 787-792   Dec 2008
渡辺惇哉, 石村寿朗, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   108(354(ET2008 58-72)) 71-76   Dec 2008
WATANABE Junya, ISHIMURA Toshiro, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   108(354) 71-76   Dec 2008
This study aims to build an universal e-Learning environment which provides the synchronization capability of learning contents between multiple learning management systems (LMSs) over various bandwidth communication network. Aimed universal envir...
北村士朗, 宇佐川毅, 杉谷賢一, 中野裕司, 喜多敏博, 入口紀男, 松葉龍一, 武蔵泰雄, 右田雅裕, 久保田真一郎
コンピュータ&エデュケーション   25 12-17   Dec 2008
冨田美奈子, SAON Sharifah, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   108(306(EA2008 84-100)) 87-92   Nov 2008
河野亮詞, 苣木禎史, 宇佐川毅
電子情報通信学会技術研究報告   108(306(EA2008 84-100)) 81-85   Nov 2008
TOMITA Minako, SAON Sharifah, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   108(306) 87-92   Nov 2008
Various approaches for sound source segregation have been proposed. And the performance of these sound source segregation techniques should be evaluated by quantitative and objective methods that take into account perceptual model and psychoacoust...
KAWANO Ryouji, CHISAKI Yoshifumi, USAGAWA Tsuyoshi
IEICE technical report   108(306) 81-85   Nov 2008
The frequency domain binaural model (FDBM) has been studied as the basic processing model of a binaural hearing assistance system. Concerning the perceptual performance, "musical noise" introduced mainly due to estimation error becomes problem. In...
片山泰輔, 長西将弘, 苣木禎史, 宇佐川毅
電気関係学会九州支部連合大会講演論文集(CD-ROM)   61st ROMBUNNO.03-2P-20   Sep 2008
長西将弘, 片山泰輔, 苣木禎史, 宇佐川毅
日本音響学会研究発表会講演論文集(CD-ROM)   2008 ROMBUNNO.3-P-25   Sep 2008

Teaching Experience

 
 

Published Papers

 
Irwansyah, Tsuyoshi Usagawa
IEEE Region 10 Annual International Conference, Proceedings/TENCON   2017-December 3099-3104   Dec 2017   [Refereed]
© 2017 IEEE. When presenting a stereo sound over a pair of transducers on a bone conduction headphone, the sound wave coming from either the left or right side transducer is delivered directly to the cochlea in both ears. This mechanism is often r...
Mon Mon The, Tsuyoshi Usagawa
IEEE Region 10 Annual International Conference, Proceedings/TENCON   2017-December 2072-2076   Dec 2017   [Refereed]
© 2017 IEEE. For many developing countries, e-learning is considered as a solution to handle rapidly demand of higher education. However, in order to implement e-learning effectively in any university, it is also important to ascertain the existin...
Xiuyuan Qin, Tsuyoshi Usagawa
Applied Acoustics   126 19-25   Nov 2017   [Refereed]
© 2017 Elsevier Ltd Loudness as a subjective measurement and acceleration as an objective measurement were taken to measure the frequency characteristics of four different bone conduction actuators. The loudness of bone conduction was measured by ...
Irwansyah, Naoyuki Kuse, Tsuyoshi Usagawa
AIP Conference Proceedings   1867    Aug 2017   [Refereed]
© 2017 Author(s). Directivity pattern of an ordinary loudspeaker becomes more directive at higher frequencies. However, because a single loudspeaker tends to radiate uniformly in all directions at low frequencies, reverberation from surrounding bu...
Medical Record Protection with Improved GRDE Data Hiding Method on Audio Files
Andra Muhammad Bagus, Ahmad Tohari, Usagawa Tsuyoshi
ENGINEERING LETTERS   25(2) 112-124   May 2017   [Refereed]
Luther Alexander Latumakulita, Fajar Purnama, Tsuyoshi Usagawa, Sary Paturusi, Delta Ardy Prima
Proceedings of 2016 International Conference on Information and Communication Technology and Systems, ICTS 2016   107-113   Apr 2017
© 2016 IEEE. 'Bidik Misi' scholarship program had been released by Indonesia Government since 2010. The main qualification has two aspects; family's economics and academic performance. The qualification parameters of 'Bidik Misi' scholarship are d...
Sumenge Tangkawarouw Godion Kaunang, Sary D.E. Paturusi, Tsuyoshi Usagawa, Glanny Mangindaan, Alwin Sambul, Brave Sugiarso
Proceedings of 2016 International Conference on Information and Communication Technology and Systems, ICTS 2016   244-248   Apr 2017
© 2016 IEEE. In order to obtain the feedback of students perception on delivered e-learning course, we have conducted a survey. The survey focused on the virtual programming lab (VPL) for the electrical power system course. The VPL is an activity ...
Sary Paturusi, Tsuyoshi Usagawa, Arie Lumenta
Proceedings of 2016 International Conference on Information and Communication Technology and Systems, ICTS 2016   220-225   Apr 2017
© 2016 IEEE. In today's digital age, electronic learning (e-learning), refers to learning via the Internet, has become a significant trend. Accordingly, the higher education institutions progressively contribute to providing e-learning. This paper...
Kohichi Ogata, Tsuyoshi Usagawa
Acoustical Science and Technology   38(4) 203-212   Jan 2017   [Refereed]
© 2017 The Acoustical Society of Japan. This paper introduces an implementation of a compulsory course, "Digital Signal Processing I," in a blended learning style. This subject is delivered by two lecturers as weekly parallel classes using the sam...
Muhammad Bagus Andra, Muhammad Bagus Andra, Tohari Ahmad, Tsuyoshi Usagawa
Engineering Letters   25 112-124   Jan 2017
© 2017, International Association of Engineers. All rights reserved. The rapid development of the network technology and internet have changed the way of how files are distributed, including sensitive data such as medical record. Some methods have...
Irwansyah, Naoyuki Kuse, Tsuyoshi Usagawa
INTER-NOISE 2017 - 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet   2017-January    Jan 2017
© 2017 Institute of Noise Control Engineering. All rights reserved. A back-to-back speaker system can be used to achieve a cardioid-like radiation pattern in a low-frequency range. The pattern is obtained by placing two closely spaced speakers mou...
PROCEEDINGS OF 2017 11TH INTERNATIONAL CONFERENCE ON INFORMATION & COMMUNICATION TECHNOLOGY AND SYSTEMS (ICTS)   265-268   2017   [Refereed]
Luther Alexander Latumakulita,Tsuyoshi Usagawa
13th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery, ICNC-FSKD 2017, Guilin, China, July 29-31, 2017   1309-1314   2017   [Refereed]
2017 INTERNATIONAL CONFERENCE ON ADVANCED COMPUTER SCIENCE AND INFORMATION SYSTEMS (ICACSIS)   198-203   2017   [Refereed]
Delta Ardy Prima, Delta Ardy Prima, Tsuyoshi Usagawa, I. Ketut Eddy Purnama, Mochamad Hariadi
Journal of Theoretical and Applied Information Technology   93 106-115   Nov 2016   [Refereed]
© 2005 - 2016 JATIT & LLS. All rights reserved.The development of computer graphics–rendering technology is rapidly increasing—the next-gen game can present 3D images that are closer to reality and can be run in real time. This allows the emergenc...
Development of Open Textbooks Learning Analytics System
Prasad Deepak, Totaram Rajneel, Usagawa Tsuyoshi
INTERNATIONAL REVIEW OF RESEARCH IN OPEN AND DISTRIBUTED LEARNING   17(5) 215-233   Sep 2016   [Refereed]
Fajar Purnama, Tsuyoshi Usagawa, Royyana M. Ijtihadie, Linawati
Proceedings - 2016 IEEE Region 10 Symposium, TENSYMP 2016   24-29   Jul 2016   [Refereed]
© 2016 IEEE. E-learning has been widely implemented in educations system. Most higher institutions have applied Learning Management Systems (LMSs) to manage their online courses, with Moodle as one of the most favored LMS. However on the other sid...
Deepak Prasad, Rajneel Totaram, Tsuyoshi Usagawa
TechTrends   60(4) 344-349   Jul 2016   [Refereed]
© 2016, Association for Educational Communications & Technology.In the last few years, open textbook development has picked up dramatically due both to the expense of commercially published textbooks and the increasing availability of high-quality...
Use of Facebook by Secondary School Students at Nuku'alofa as an Indicator of E-Readiness for E-Learning in the Kingdom of Tonga
Hans T., Sopu, Chisaki Yoshifumi, Usagawa Tsuyoshi
INTERNATIONAL REVIEW OF RESEARCH IN OPEN AND DISTRIBUTED LEARNING   17(4) 203-223   Jun 2016   [Refereed]
PROCEEDINGS OF 2016 INTERNATIONAL CONFERENCE ON INFORMATION & COMMUNICATION TECHNOLOGY AND SYSTEMS (ICTS)   220-225   2016   [Refereed]
Sary Paturusi, Yoshifumi Chisaki, Tsuyoshi Usagawa, Arie Lumenta
Proceedings of 2015 International Conference on Information and Communication Technology and Systems, ICTS 2015   193-196   Jan 2016
© 2015 IEEE. Mobile learning is considered as a current research field to be explored especially in the developing country. This study investigates students' acceptance of mobile learning in higher education in Indonesia. This work involves 420 un...
Delta Ardy Prima, Delta Ardy Prima, Mochamad Hariadi, I. Ketut Eddy Purnama, Tsuyoshi Usagawa
International Review on Computers and Software   11 773-793   Jan 2016   [Refereed]
© 2016 Praise Worthy Prize S.r.l. - All rights reserved.Manually placing and animating virtual camera in a dynamic virtual environment to generate computer animation is a complex and time-consuming process. For this reason, this paper proposes a m...
T. Hans, Sopu, Yoshifumi Chisaki, Tsuyoshi Usagawa
International Review of Research in Open and Distance Learning   17 203-223   Jan 2016   [Refereed]
The Kingdom of Tonga is an isolated least developing country located on the northeast of New Zealand with a population of 103,252 (2011 census) and with a gross domestic product per capita of USD $2,545.20. Before educational systems in a least de...
Deepak Prasad, Deepak Prasad, Rajneel Totaram, Tsuyoshi Usagawa
International Review of Research in Open and Distance Learning   17 215-234   Jan 2016   [Refereed]
Textbook costs have skyrocketed in recent years, putting them beyond the reach of many students, but there are options which can mitigate this problem. Open textbooks, an open educational resource, have proven capable of making textbooks affordabl...
Tohari Ahmad,Doni S. Pambudi,Tsuyoshi Usagawa
7th International Conference of Soft Computing and Pattern Recognition, SoCPaR 2015, Fukuoka, Japan, November 13-15, 2015   84-88   2015   [Refereed]
PROCEEDINGS OF 2016 INTERNATIONAL CONFERENCE ON INFORMATION & COMMUNICATION TECHNOLOGY AND SYSTEMS (ICTS)   107-113   2016   [Refereed]
PROCEEDINGS OF 2016 INTERNATIONAL CONFERENCE ON INFORMATION & COMMUNICATION TECHNOLOGY AND SYSTEMS (ICTS)   244-248   2016   [Refereed]
Deepak Prasad, Tsuyoshi Usagawa
International Review of Research in Open and Distance Learning   15(4) 226-247   Jan 2014   [Refereed]
Textbook prices have soared over the years, with several studies revealing many university students are finding it difficult to afford textbooks. Fortunately, two innovations - open educational resources (OER) and open textbooks - hold the potenti...
USAGAWA Tsuyoshi
Journal of JSEE   64(5) 5_2-5_2   2016
Yali Zheng, Yali Zheng, Yoshifumi Chisaki, Tsuyoshi Usagawa
2013 International Conference on Advanced Computer Science and Information Systems, ICACSIS 2013   173-178   Jan 2013   [Refereed]
Audio plays an important role among information sources in our life. As a result of current technology, it is available to record people's huge personal life activities as life-logs from long-term and multi-dimensional point of view on portable de...
Xiuyuan Qin, Yoshifumi Chisaki, Tsuyoshi Usagawa
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control      Jan 2014
Bone conduction is being utilized widely for music reproduction and hearing aids. However, due to unclear transmitting process of bone conduction, some detailed characteristics are still in discussion. Previous researchers has made achievements on...
Sary Paturusi, Yoshifumi Chisaki, Tsuyoshi Usagawa
Proceedings of 2014 International Conference on Information, Communication Technology and System, ICTS 2014   211-215   Jan 2014
© 2014 IEEE. Nowadays, the advancement in educational technology accelerated by the dissemination of Internet has a potential opportunity to improve the quality of education by encouraging participation and collaboration between lecturers and stud...
Hans Tobias Sopu,Yoshifumi Chisaki,Tsuyoshi Usagawa
IIAI 3rd International Congress on Advanced Applied Informatics, IIAI-AAI 2014, Kokura Kita-ku, Japan, August 31 - Sept. 4, 2014   510-516   2014   [Refereed]
Tsuyoshi Usagawa, Yuhei Nakashima, Yoshifumi Chisaki, Takayuki Nagai, Toshihiro Kita
Proceedings of 2014 International Conference on Information, Communication Technology and System, ICTS 2014   199-204   Jan 2014
© 2014 IEEE. Students' attendance records of classes are primary and required data to manage a course and to take care of students, but a recording task causes extra burden and loss of lecturing time. An attendance management system using student ...
Tsuyoshi Usagawa,Masahiro Yamaguchi,Yoshifumi Chisaki,Royyana Muslim Ijtihadie,Achmad Affandi
2013 12th International Conference on Information Technology Based Higher Education and Training, ITHET 2013, Antalya, Turkey, October 10-12, 2013   1-6   2013   [Refereed]
Shun Yoshino, Takuro Tomita, Yoshifumi Chisaki, Tsuyoshi Usagawa
INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control      Jan 2014
Various binaural models have been proposed for the application of hearing assistance system as well as humanoid robot, and a frequency domain binaural model(FDBM) is the one. Like other binaural models, the original FDBM can separate and segregate...
Yoshifumi Chisaki,Shogo Tanaka,Tsuyoshi Usagawa
Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2013, Kaohsiung, Taiwan, October 29 - November 1, 2013   1-5   2013   [Refereed]
Tsuyoshi Usagawa, Takuro Tomita, Yoshifumi Chisaki
Proceedings of Meetings on Acoustics   19    Jun 2013
Conventional binaural model or binaural hearing assistance systems have a well known ambiguity in front-back discrimination which is called as "front-back confusion" or "cone of confusion" in psychoacoustics. It is known that spectral cue of sound...
Yoshifumi Chisaki,Dan Murakami,Tsuyoshi Usagawa
Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA 2012, Hollywood, CA, USA, December 3-6, 2012   1-6   2012   [Refereed]
Royyana M. Ijtihadie, Royyana M. Ijtihadie, Bekti C. Hidayanto, Achmad Affandi, Yoshifumi Chisaki, Tsuyoshi Usagawa
Human-centric Computing and Information Sciences   2(1) 1-16   Dec 2012   [Refereed]
© 2012, Ijtihadie et al.; licensee Springer.Well-designed instructional material is equally important for successful e-Learning implementation. Teachers and instructors play a major role in terms of designing and building learning content. In one ...
YAMAMOTO Tomohiro, CHISAKI Yoshifumi, USAGAWA Tsuyoshi, SHIMIZU Yasutaka
Japan Journal of Educational Technology   36(0) 157-160   2012
小学校6年児童を対象に,算数「分数」の4年から6年までの既習内容を,LMSのテスティング機能を用いて29の学習コースを提供し,振り返り学習を展開した.利用状況や児童の意識調査の結果から,テスティング機能を用いて前学年までの内容を提示することで,児童が分数を難しく感じる度合いが低下していることを示した.また,客観テストの結果から,下位群,中位群とともに,上位群の児童も客観テストの得点が有意に向上しており,LMSのテスティング機能を用いた振り返り学習が児童の分数に関する知識や計算技能を高めるこ...
Tomohisa Masmima, Yoshifumi Chisaki, Tsuyoshi Usagawa
IEEE Region 10 Annual International Conference, Proceedings/TENCON   1341-1346   Dec 2010   [Refereed]
An utterance training system utilizing automatic speech recognition (ASR) has been developed as a computer aided language laboratory system. Because the performance of ASR is seriously degraded due to surround noise, many noise reduction methods h...
Tsuyoshi Usagawa, Syuhei Murakami, Vecky Canisius Poekoel, Yoshifumi Chisaki
40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011   3 2561-2565   Dec 2011
Directivity of an ordinary loudspeaker is far from unidirectional characteristics in low frequency range; a single loudspeaker works similar to an omni-directional sound source. When we would like to build an evacuation guidance system using multi...
Yoshifumi Chisaki, Tomohisa Mashima, Tsuyoshi Usagawa
40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011   2 1425-1431   Dec 2011
Automatic speech recognition under noisy environment is important issue. Many noise reduc- tion systems, such as a microphone array, have been proposed. The microphone array method requires a large number of elements for sufficient performance; th...
喜多 敏博, 根本 淳子, 上田 公代, 宇佐川 毅
研究報告コンピュータと教育(CE)   2011(2) 1-4   Oct 2011
オンライン学習環境を前提とする課程等では、LMS (Learning Management System) は核となるシステムだが、PC 端末が設置されていない通常教室 (普通教室) で行われる授業でも、LMS が持つ機能を利用できれば、授業運営の効率化や教育効果向上が期待できる。LMS の代表格の一つである Moodle を通常教室での授業でも利用するために、2 つの追加機能 (プラグイン) を開発した。開発には全てオープンソースのライブラリやツールを用いた。これらを用いると、紙に書かれ...
Royyana M. Ijtihadie, Yoshifumi Chisaki, Tsuyoshi Usagawa, H. Bekti Cahyo, Achmad Affandi
IEEE Region 10 Annual International Conference, Proceedings/TENCON   2402-2405   Dec 2010   [Refereed]
Rapid growing of internet applications and users has led the improvement of mobile web browser technology and standards such as HTML5. Recently, HTML5 is turning to be a de facto standard after some of its features has been implemented in major mo...
DNS Based Detection of SSH Dictionary Attack in Campus Network
Romana Dennis Arturo Ludena, Musashi Yasuo, Takemori Kazuya, Kumagai Masaya, Kubota Shinichiro, Sugitani Kenichi, Usagawa Tsuyoshi, Sueyoshi Toshinori
INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL   13(3) 701-707   May 2010   [Refereed]
Yoyon K. Suprapto, I. Ketut Eddy Purnama, Mochamad Hanadi, Maundhi Hery Purnomo, Tsuyoshi Usagawa
International Conference on Instrumentation, Communication, Information Technology, and Biomedical Engineering 2009, ICICI-BME 2009   275-+   Dec 2009   [Refereed]
A Gamelan set consists of several groups of different instruments. One of the groups is called Balungan. Gamelan is contracted manually by hand with simple tools so it is very hard to find two gamelan sets are totally identical. In this research w...
Tsuyoshi Usagawa, Yoshifumi Chisaki
39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010   7 5138-5147   Dec 2010
In order to realize a reliable hearing assistant system, we need to control howling in order to protect a user. Detection of a howling is the most important issue to implement a howling canceller because the distinction of feedback component by ac...
Linda Indrayanti, Yoshifumi Chisaki, Tsuyoshi Usagawa
Journal of Computer Science   6(11) 1334-1340   Nov 2010   [Refereed]
Problem statement: In order to build an utterance training system for Indonesian language, a speech recognition system designed for Indonesian is necessary. However, the system hardly works well due to the pronunciation variants of non-native utte...
Nobuo Mizuuchi, Nobuo Mizuuchi, Katsuya Maruyama, Katsuya Maruyama, Takashi Moroi, Takashi Moroi, Shohei Takemoto, Toshinori Sueyoshi, Tsuyoshi Usagawa, Norio Iriguchi
2009 ICME International Conference on Complex Medical Engineering, CME 2009   208-212   Jul 2009   [Refereed]
In this study, we made clear that we could depict spinal cord directly by using a diffusion weighted image. Conventional MR Myelography is a water emphasis image depicting CSF (cerebrospinal fluid) to a high signal. It may be said that we catch sp...
Hiroshi Nakano, Kenichi Sugitani, Takayuki Nagai, Shinichiro Kubota, Masahiro Migita, Yasuo Musashi, Norio Iriguchi, Tsuyoshi Usagawa, Toshihiro Kita, Ryuichi Matsuba
2010 IEEE Education Engineering Conference, EDUCON 2010   153-158   Jul 2010
We developed a web-based time schedule system as an important feature of the university portal along with our university's long-term ICT (Information and Communication Technologies) plan. By using the system, students and professors can get their ...
YAMAMOTO Tomohiro, CHISAKI Yoshifumi, USAGAWA Tuyoshi, SHIMIZU Yasutaka
Research report of JSET Conferences   2010(3) 93-98   Jul 2010
Yoshifumi Chisaki,Toshimichi Takada,Masahiro Naganishi,Tsuyoshi Usagawa
IEICE Transactions   E91-A(10) 3059-3062   Oct 2008   [Refereed]
Measurement of T-2 Relaxation Time and Fiber Orientation Degree of Collagen Gel Exposed to a Magnetic Field
Takeuchi Michihiro, Ueno Shoogo, Usagawa Tsuyoshi, Sueyoshi Toshinori, Sekino Masaki, Iriguchi Norio
INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL   13(1) 229-234   Jan 2010   [Refereed]
Yoshifumi Chisaki,Ryouji Kawano,Tsuyoshi Usagawa
IEICE Transactions   E91-A(8) 2041-2044   Aug 2008   [Refereed]
Katsuya Maruyama, Katsuya Maruyama, Nobuo Mizuuchi, Nobuo Mizuuchi, Takashi Moroi, Takashi Moroi, Itsuo Isobe, Tsuyoshi Usagawa, Toshinori Sueyoshi, Norio Iriguchi
2009 ICME International Conference on Complex Medical Engineering, CME 2009   200-+   Jul 2009   [Refereed]
MR angiography of the abdominal artery has been often performed using contrast agents. Recent attention has focused on non-contrast MR techniques for evaluating the abdominal artery and cardio vascular, most notably Steady-State Free Precession (S...
2009 ICME INTERNATIONAL CONFERENCE ON COMPLEX MEDICAL ENGINEERING   217-220   2009   [Refereed]
T2 Weighted Isotropic Imaging of the Abdomen at 3T: Combination of Variable-Refocusing-Flip-Angle Technique SPACE and Navigator Triggering Technique PACE
Moroi Takashi, Maruyama Katsuya, Mizuuchi Nobuo, Imura Chiaki, Isobe Itsuo, Usagawa Tsuyoshi, Sueyoshi Toshinori, Iriguchi Norio
INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL   12(3) 709-720   May 2009   [Refereed]
USAGAWA Tsuyoshi, OGATA Koichi
The Journal of the Acoustical Society of Japan   65(5) 282-287   May 2009
MARUYAMA Katsuya, TOZAKI Mitsuhiro, MIZUUCHI Nobuo, MOROI Takashi, TAKIZAWA Osamu, USAGAWA Tsuyoshi, SUEYOSHI Toshinori, IRIGUCHI Norio
Medical imaging technology   27(2) 91-96   Mar 2009
MARUYAMA Katsuya, TOZAKI Mitsuhiro, MIZUUCHI Nobuo, MOROI Takashi, TAKIZAWA Osamu, USAGAWA Tsuyoshi, SUEYOSHI Toshinori, IRIGUCHI Norio
Medical Imaging Technology   27(2)    2009
Tomita Minako, Saon Sharifah, Chisaki Yoshifumi, Usagawa Tsuyoshi
Journal of the Acoustical Society of Japan (E)   30(6) 448-451   2009
Yoshifumi Chisaki, Sho Kawano, Kyoko Nagata, Kotaro Matsuo, Hidetoshi Nakashima, Tsuyoshi Usagawa
Acoustical Science and Technology   29(2) 139-148   Mar 2008   [Refereed]
Sound source localization and signal segregation using a small number of microphone elements is expected in not only multimedia products but also in daily-use products, such as hearing aids. The frequency domain binaural model can localize a sound...
Kitamura Shirou, Usagawa Tsuyoshi, Sugitani Kenichi, Nakano Hiroshi, Kita Toshihiro, Iriguchi Norio, Matsuba Ryuichi, Musashi Yasuo, Migita Masahiro, Kubota Shinichirou
Computer & Education   25(0) 12-17   2008
We have a couple of courses,"Basic Course of Information Technologies A and B"for all the fresh students in Kumamoto University. In the courses, we, especially provide online assessment tests,"Confirmation Test"in which the students can take an on...
M. Murao, T. Miyamoto, M. Migita, K. Ogawa, H. Akiyama, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   858-861   Dec 2007
Low field MRI machines are important, since the machines offer easy access for users. However, the SNR attained with a low field MRI machine is not necessarily high. This paper attempts to present an effective resonator coil designed in particular...
T. Moroi, T. Moroi, N. Mizuuchi, N. Mizuuchi, K. Maruyama, K. Maruyama, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   722-726   Dec 2007
Multi-slice 2D Turbo Spin Echo (TSE) sequences are widely used for T2-weighted MR imaging of the liver. On the other hand, there is a demand for 3D imaging to enable the observation of thinner slices, though 3D TSE has often been associated with a...
N. Mizuuchi, N. Mizuuchi, K. Maruyama, K. Maruyama, T. Moroi, T. Moroi, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   790-793   Dec 2007
Susceptibility-Weighted Imaging (SWI) is a powerful technique to produce an image with a strong contrast of magnetic susceptibility in a high field. The technique is particularly useful in emphasizing blood vessels, for example, the vein and iron ...
K. Maruyama, K. Maruyama, N. Mizuuchi, N. Mizuuchi, T. Moroi, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   574-578   Dec 2007
Diffusion-weighted imaging (DWI) of the human brain is well established with 1.5T machines. DWI is now used also for other regions than the brain, and especially focused on prostate cancer detection as a promising tool On the other hand, IH-MR spe...
T. Miyamoto, N. Mizuuchi, T. Moroi, K. Maruyama, M. Migita, K. Ogawa, T. Usagawa, H. Akiyama, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   623-626   Dec 2007
Underlying principles of RF coil techniques are described. A set of coaxial slotted-tube resonators is explicitly introduced. The coil has two coaxial slotted-tubes which can resonate independently and dependently together. The principles of the r...
K. Maruyama, K. Maruyama, N. Mizuuchi, N. Mizuuchi, T. Moroi, T. Moroi, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   570-573   Dec 2007
Three-Tesla MRI machines are widely used in clinical medicine. Expectations to 3.0T MRA are so large in depicting blood vessels in a short time, clearly and noninvasively. We developed a 3.0T MRA tactics and carried it out for peripheral regions w...
A curriculum ensuring information literacy (IL): An Indonesian-Japanese institutional mission
Indrayanti Linda, Iriguchi Norio, Dutono Titon, Usagawa Tsuyoshi
INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL   10(6) 833-838   Nov 2007   [Refereed]
Yoshifumi Chisaki, Kotaro Matsuo, Katsumori Hagiwara, Hidetoshi Nakashima, Tsuyoshi Usagawa
Applied Acoustics   68(8) 923-938   Aug 2007   [Refereed]
There are many approaches to achieving high-performance speech enhancement. The modeling of the human auditory system is a good approach, since human beings can focus on target speech under concurrent speech conditions. One example of the binaural...
T. Moroi, T. Moroi, N. Mizuuchi, N. Mizuuchi, K. Maruyama, K. Maruyama, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   740-743   Dec 2007
In a magnetic field of 3.0Tesla, motion artifacts are more serious, particularly in MRI of the moving upper abdomen, than those in a field of 1.5Tesla or lower. We carried out free-breathing Prospective Acquisition Correction (PACE) T2-weighted im...
K. Maruyama, K. Maruyama, N. Mizuuchi, N. Mizuuchi, T. Moroi, T. Moroi, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   566-569   Dec 2007
Diffusion-weighted imaging (DWI) of the human brain is well established with 1.5T MRI. DWI is now used also for other regions than the brain, and especially focused on prostate cancer detection as a promising tool. On the other hand, IH-MR spectro...
N. Mizuuchi, N. Mizuuchi, K. Maruyama, K. Maruyama, T. Moroi, T. Moroi, C. Imura, I. Isobe, T. Usagawa, N. Iriguchi
2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007   786-789   Dec 2007
MR myelography (MR imaging of nerve root of the Lumber vertebra) is one of examination methods widely used. Either 2D or 3D scanning is selected depending on the patient lesions. There are so many tactics to perform MR myelography that is not suit...
Tsuyoshi Usagawa, Tsuyoshi Usagawa, Kenichi Sugitani, Toshihiro Kita, Norio Iriguchi, Masahiro Migita, Ryuichi Matsuba, Yasuo Musashi, Hiroshi Nakano, Hiroshi Nakano
7th International Conference on Information Technology Based Higher Education and Training, ITHET   647-651   Dec 2006   [Refereed]
For the quality assurance of IT literacy, the IT based learning environments and e-Learning courses have been intensively developed. University implements "The Basic Course of Information Technologies A and B" as required subjects of all fresh stu...
Yoshifumi Chisaki, Kotaro Matsuo, Tsuyoshi Usagawa
Acoustical Science and Technology   28(2) 90-97   Mar 2007   [Refereed]
Howling cancelation is an important issue for realizing either monaural or binaural hearing assistant systems including hearing aids. Although binaural hearing assisting systems have become popular, most of them use two independent monaural howlin...
Kimiko Yamakawa, Kimiko Yamakawa, Tsuyoshi Usagawa, Tsuyoshi Usagawa, Yoshifumi Chisaki, Yoshifumi Chisaki, Ayumi Ueno, Ayumi Ueno, Kousuke Umeda, Kousuke Umeda, Izumi Umeda, Izumi Umeda, Toshiyuki Imanishi, Toshiyuki Imanishi
7th International Conference on Information Technology Based Higher Education and Training, ITHET   531-535   Dec 2006   [Refereed]
Due to the limited number of classroom activities on pronunciation, it is difficult for L2 learners to acquire the proper pronunciation of Japanese words. Moreover, because of the practical restrictions of classroom learning, the only way to impro...
USAGAWA Tsuyoshi
The Journal of the Acoustical Society of Japan   63(1) 1-2   Dec 2006
2006 7TH INTERNATIONAL CONFERENCE ON INFORMATION TECHNOLOGY BASED HIGHER EDUCATION AND TRAINING, VOLS 1 AND 2   571-574   2006   [Refereed]
Yoshifumi Chisaki, Kotaro Matsuo, Tsuyoshi Usagawa
Acoustical Science and Technology   27 248-251   Jul 2006   [Refereed]
A simple howling cancelation method is proposed for a binaural hearing assistant system using interaural level difference (ILD). Howling cancelation is an important issue in hearing assistant systems including hearing aids. A 4-channel input and b...
Kimiko Yamakawa, Yoshifumi Chisaki, Tsuyoshi Usagawa
Acoustical Science and Technology   27(4) 236-238   Jul 2006   [Refereed]
The tendency of pronunciation of the Japanese affricate tsu spoken by second language (L2) learners, specially Koreans, by means of evaluation testing, was analyzed. Thirteen native speakers of Korean language were selected to study how received n...
Hiroshi Nakano, Norio Iriguchi, Kenichi Sugitani, Toshihiro Kita, Yasuo Musashi, Masahiro Migita, Ryuichi Matsuba, Yasushi Ohta, Tohru Gobayashi, Kazutaka Tsuji, Masaru Shimamoto, Takeshi Kida, Tsuyoshi Usagawa, Hidenori Akiyama
ITHET 2005: 6th International Conference on Information Technology Based Higher Education and Training, 2005   2005    Dec 2005
Kumamoto University implements basic courses of information technologies as required subjects of all faculties from 2002. They can be assumed as large-scale courses because there are approximately 1,800 learners respectively. They are managed by s...
Tsuyoshi Usagawa, Kotaro Matsuo, Sho Kawano, Hidetoshi Nakashima, Yoshifumi Chisaki
12th International Congress on Sound and Vibration 2005, ICSV 2005   1 482-489   Dec 2005
A hearing aid system not only for hearing-impaired person but also elder person, called a hearing assistant system, has been developed for a long time. The hearing aid system becomes smaller with a development of hardware day by day. Because usual...
Hiromits Miyazono, Ryoji Baba, Ryouichi Hayama, Yoshifumi Chisaki, Tsuyoshi Usagawa, Masanao Ebata
International Congress on Noise Control Engineering 2005, INTERNOISE 2005   4 3130-3135   Dec 2005
In Japan, the revised traffic regulation was enforced in 1 st Nov. 2004 and prohibited use of cellular phone with driving. It seems to emphasize on a dangerous for manual operation and holding of phone, though a conversation with hands-free equip...
INDRAYANTI Linda, IRIGUCHI Norio, MATSUBA Ryuichi, MIGITA Masahiro, DUTONO Titon, USAGAWA Tsuyoshi
The Papers of Technical Meeting on Frontiers in Education, IEE Japan   2005(32) 69-72   Dec 2005
Yoshifumi Chisaki, Tsuyoshi Hariki, Tsuyoshi Usagawa, Department of Computer Science Faculty of Engineering Kumamoto University, Technical Division Faculty of Engineering Kumamoto University, Department of Computer Science Faculty of Engineering Kumamoto University
Journal of Japanese Society for Artificial Intelligence   20(6) 699-706   Nov 2005
Yoshifumi Chisaki, Haruki Morinaga, Katsutoshi Kitajima, Mitsuhiro Koba, Tsuyoshi Usagawa
Acoustical Science and Technology   26(4) 371-373   Jul 2005   [Refereed]
A speech encryption system with a low bit rate coding algorithm for analogue transmission was proposed. Six encryption keys were introduced to three different blocks to protect speech information. The signal generated by the coding block was encry...
KYOUNO Noboru, USAGAWA Tsuyoshi, YAMABUCHI Tatsuo, KAGAWA Yukio
The Journal of the Acoustical Society of Japan   61(6) 312-319   Jun 2005
電気機械音響変換器としてコーン形スピーカの音響特性を定量的に計算する解析法を開発した。解析モデルは軸対称で無限大バッフルに取り付けられている。解析には有限要素として, 振動系にはコニカルシェル要素を, 音響系には三角リング要素を適用した。また, 音が放射される外部空間にはGreen関数を適用して解析的に取扱い, 電気系については等価回路を適用した。スピーカの出力音圧特性について測定結果と比較した結果, 低音域では無限大バッフルの仮定に起因する差が見られるものの, ピストン振動領域では両者は...
Osamu Komoda, Tomohiro Ishiodori, Hiromitsu Miyazono, Tsuyoshi Usagawa, Masanao Ebata
Acoustical Science and Technology   26(3) 296-298   May 2005   [Refereed]
The laterality threshold was studied using tone bursts with interaural intensity differences (IID) as stimuli under several temporal masking conditions. The level of the test tone was changed depending on participants' responses following the 3-do...
Yoshifumi Chisaki, Hidetoshi Nakashima, Akira Nakagawa, Tsuyoshi Usagawa, Masanao Ebata
Acoustical Science and Technology   25(1) 30-36   Jan 2004   [Refereed]
A high performance pitch detection algorithm, called harmonic wavelet transform method, was proposed. Since the algorithm is based on a continuous wavelet transform, the cost of computation is high. However, real-time processing of the algorithm i...
Hidetoshi Nakashima, Yoshifumi Chisaki, Tsuyoshi Usagawa, Masanao Ebata
Acoustical Science and Technology   24(4) 172-178   Jul 2003   [Refereed]
We can communicate with others in a noisy environment. This phenomenon is known as a "Cocktail Party Effect" and is one of the most important binaural functions. This paper addresses a frequency domain binaural model that plays the role of a binau...
Yoshifumi Chisaki, Hidetoshi Nakashima, Shuuichi Shiroshita, Tsuyoshi Usagawa, Masanao Ebata
Acoustical Science and Technology   24 7-16   Jan 2003   [Refereed]
In order to track a rapid transient of pitch, a required frame length of some conventional pitch detection methods is too long. Although there are wavelet based pitch detection methods which require only a few periods of pitch for a frame, they ar...
NAKASHIMA Hidetoshi, CHISAKI Yoshifumi, USAGAWA Tsuyoshi, EBATA Masanao
IEICE Trans. Fundamentals   85(10) 2283-2292   Oct 2002
This paper addresses the single channel speech enhancement method which utilizes the mean value and variance of the logarithmic noise power spectra. An important issue for single channel speech enhancement algorithm is to determine the trade-off p...
Hirokazu Shimada, Hirokazu Shimada, Yasuyuki Shimada, Yasuyuki Shimada, Tsuyoshi Usagawa, Tsuyoshi Usagawa, Masanao Ebata, Masanao Ebata
Acoustical Science and Technology   23 275-283   Sep 2002   [Refereed]
In recent years, many applications such as speech recognition system and teleconference system are in the limelight. For these systems to perform well, it is necessary to get rid of the influence of surrounding noise. Many researchers have studied...
KOUDA Akira, USAGAWA Tsuyoshi, EBATA Masanao
J. Acoust. Soc. Jpn.   58(8) 493-500   Aug 2002   [Refereed]
雑音除去の有効な方法であるスペクトルサブトラクション法において,単一のマイクロホンで雑音スペクトルのみを事前に得ることが常に可能であるとは限らない。本論文では,雑音の事前情報を必要とせず雑音スペクトル推定にパワー変動を利用したブラインド方式によるスペクトルサブトラクション法を提案する。本ブラインド方式は,雑音の定常性を仮定し,各周波数のパワーの時間的変動から局所的分散を計算して,局所的分散が最小となるパワーをその周波数の雑音のパワーであると推定するものである。実音声を用いた実験においてSN...

Education

 
Apr 1981
 - 
Mar 1983
Graduate School of Engineering, Tohoku University
 
Apr 1977
 - 
Mar 1981
Faculty of Engineering, Kyushu Institute of Technology