Faculty Profiles - YONEZAWA Takuro

Papers - YONEZAWA Takuro

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LiDSN: A Method to Deploy Wireless Sensor Networks Securely based on light communication Reviewed

Nguyen, GDM; Takimoto, T; Yonezawa, T; Nakazawa, J; Takashio, K; Tokuda, H

UBICOMP'12: PROCEEDINGS OF THE 2012 ACM INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING page： 539 - 540 2012

Enhancing communication and dramatic impact of online live performance with cooperative audience control Reviewed

Takuro Yonezawa, Hideyuki Tokuda

UbiComp'12 - Proceedings of the 2012 ACM Conference on Ubiquitous Computing page： 103 - 112 2012

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

Recent progress in information technology enables people to easily broadcast events live on the Internet. Although the advantage of the Internet is live communication between a performer and listeners, the current mode of communication is writing comments using Twitter or Facebook, or some similar messaging network. In one type of live broadcast, musical performances, it is difficult for a musician, when playing an instrument, to communicate with listeners by writing comments. We propose a new communication mode between performers who play musical instruments, and their listeners by enabling listeners to control the performer's camera or illumination remotely. The results of four weeks of experiment confirm the emergence of nonverbal communication between a performer and listeners, and among listeners, which increases camaraderie amongst listeners and performers. Additionally, the dramatic impact of a performance is increased by enabling listeners to control various camera actions such as zoom-in or pan in real time. The results also provide implications for design of future interactive live broadcasting services. Copyright 2012 ACM.

DOI： 10.1145/2370216.2370234

Scopus

Detection, classification and visualization of place-triggered geotagged tweets. Reviewed

Shinya Hiruta, Takuro Yonezawa, Marko Jurmu, Hideyuki Tokuda

The 2012 ACM Conference on Ubiquitous Computing, Ubicomp '12, Pittsburgh, PA, USA, September 5-8, 2012 page： 956 - 963 2012

LiDSN: a method to deploy wireless sensor networks securely based on light communication. Reviewed

Giang Doan, Minh Nguyen, Takuya Takimoto, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

The 2012 ACM Conference on Ubiquitous Computing, Ubicomp '12, Pittsburgh, PA, USA, September 5-8, 2012 page： 539 - 540 2012

Enhancing Communication and Dramatic Impact of Online Live Performance with Cooperative Audience Control Reviewed

Yonezawa, T; Tokuda, H

UBICOMP'12: PROCEEDINGS OF THE 2012 ACM INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING page： 103 - 112 2012

Prevention Support System for Baseball player's throwing injuries

NISHIYAMA YUUKI, TAKIMOTO TAKUYA, YONEZAWA TAKURO, NAKAZAWA JIN, TAKASHIO KAZUNORI, TOKUDA HIDEYUKI

IEICE technical report Vol. 111 ( 134 ) page： 119 - 125 2011.7

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人電子情報通信学会

Some baseball players have their shoulder and elbow injuries cause of the disorder of the throwing form and an overwork. Fielders especially practice without knowledge of their bodies and care for it. However it is difficult to recognize their throwing form and number of throws. This research has been supported player's performance by analysis of player's throwing using sanjigen-motion-capcher and douga-bunnseki for all time. But this research has problems with place and time. Because it doesn't assume actual practices. So we are researching for their new supports to improve their form and to take a break by using the radio small acceleration sensor which you can check your throwing form and number of throws easily.

CiNii Research

Prevention Support System for Baseball player's throwing injuries

西山勇毅, 瀧本拓哉, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

研究報告ユビキタスコンピューティングシステム（UBI） Vol. 2011 ( 24 ) page： 1 - 7 2011.7

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

野球では崩れた投球フォームでの投球や過度の練習などにより，投球障害 (肩や肘への怪我) が多く発生する．特に野手は自分の練習量を意識せずに練習することが多く，主観による体調管理しか行われていない．既存研究では，スポーツ障害の防止，投球パフォーマンスの向上などを目的として，三次元モーションキャップチャーや動画解析などによる投球動作の分析が行われてきた．しかし，これらの研究は実際の練習での使用を想定していないため，場所の制限や解析の時間的コストなどの問題点がある．本研究では，野球選手の野手を対象に体に装着したウェアラブルなセンサを用いて客観的な投球疲労の取得手法を提案する．Some baseball players have their shoulder and elbow injuries cause of the disorder of the throwing form and an overwork. Fielders especially practice without knowledge of their bodies and care for it. However it is difficult to recognize their throwing form and number of throws. This research has been supported player's performance by analysis of player's throwing using sanjigen-motion-capcher and douga-bunnseki for all time. But this research has problems with place and time. Because it doesn't assume actual practices. So we are researching for their new supports to improve their form and to take a break by using the radio small acceleration sensor which you can check your throwing form and number of throws easily.

CiNii Research

D-9-14 Social Event Detection Based on Formation Process of Crowds Reviewed

Niwa Ryota, Yonezawa Takuro, Nakazawa Jin, Nagata Tomohiro, Suzuki Ryohei, Tokuda Hideyuki

Proceedings of the IEICE General Conference Vol. 2011 ( 1 ) page： 90 - 90 2011.2

Retrieving environmental smartness with second-sighted glasses

米澤拓郎, 中澤仁, 徳田英幸

IEICE technical report Vol. 110 ( 420 ) page： 187 - 192 2011.2

Retrieving environmental smartness with second-sighted glasses

米澤拓郎, 中澤仁, 徳田英幸

IEICE technical report Vol. 110 ( 421 ) page： 187 - 192 2011.2

Retrieving Environmental Smartness with Second-sighted Glasses

YONEZAWA Takuro, TOKUDA Hideyuki, NAKAZAWA Jin

ITE Technical Report Vol. 35.9 ( 0 ) page： 187 - 192 2011

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Image Information and Television Engineers

There has been a great effort to create context-aware technology to support user's life. Context-aware technology is useful because it resolves user's demand in prior. However, if it fails to recognize context correctly and controls appliances incorrectly, users may feel uncomfortable about the environment. Context recognition error is currently unavoidable, therefore, notifying the user of what kind of result each context has, is considered to be important in order to ease user's discomfort. In the similar way, it is important to show the smartness of ubiquitous computing environment to people who don't know about the environment. To effectively provide this information to the users, we propose an interface called Second-sighted Glasses, inspired by the movie titled "Next". The glasses shows users the future effects of each action they may take with augmented reality technique.

DOI： 10.11485/itetr.35.9.0_187

CiNii Research

Ubiquitous Services: Enhancing Cyber-Physical Coupling with Smart Enablers Open Access

TOKUDA Hideyuki, NAKAZAWA Jin, YONEZAWA Takuro

IEICE Transactions on Information and Systems Vol. E94-D ( 6 ) page： 1122 - 1129 2011

Language：English Publishing type：Research paper (scientific journal) Publisher：The Institute of Electronics, Information and Communication Engineers

Ubiquitous computing and communication are the key technology for achieving economic growth, sustainable development, safe and secure community towards a ubiquitous network society. Although the technology alone cannot solve the emerging problems, it is important to deploy services everywhere and reach real people with sensor enabled smart phones or devices. Using these devices and wireless sensor networks, we have been creating various types of ubiquitous services which support our everyday life. In this paper, we describe ubiquitous services based on a HOT-SPA model and discuss challenges in creating new ubiquitous services with smart enablers such as smart phones, wireless sensor nodes, social media, and cloud services. We first classify various types of ubiquitous service and introduce the HOT-SPA model which is aimed at modeling ubiquitous services. Several ubiquitous services, such as DIY smart object services, Twitthings, Airy Notes, and SensingCloud, are described. We then address the challenges in creating advanced ubiquitous services by enhancing coupling between a cyber and a physical space.

DOI： 10.1587/transinf.e94.d.1122

Vib-Connect: A Device Collaboration Interface Using Vibration Reviewed

Takuro Yonezawa, Hiroshi Nakahara, Hideyuki Tokuda

2011 IEEE 17TH INTERNATIONAL CONFERENCE ON EMBEDDED AND REAL-TIME COMPUTING SYSTEMS AND APPLICATIONS (RTCSA 2011), VOL 1 Vol. 1 page： 121 - 125 2011

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

The paper proposes an intuitive device selecting interface called "Vib-connect" for device collaboration. Recent progress in Information Technology allowed various devices to join wireless network. As a result, various ways of device collaborations and services became possible. However, interfaces for selecting devices are still complicated for end-users and far from being intuitive. To solve this problem, we propose "vib-connect", an interface which enables users to select device intuitively by pasting a vib-connector, a small vibration-based device. Vib-connect solves these problem by implementing these device information as a unique vibration pattern. By keeping smartphones or any kind of vibration generating device, end-users can easily select devices to collaborate. We implement a prototype, and through the evaluation, we confirmed high accuracy in vibration pattern detection and high usability satisfaction by nonexpert users. By using "Vib-connect", users without any technical expertize can easily select devices to collaborate with.

DOI： 10.1109/RTCSA.2011.48

Web of Science

Scopus

Transferring information from mobile devices to personal computers by using vibration and accelerometer Reviewed

Takuro Yonezawa, Tomotaka Ito, Hideyuki Tokuda

UbiComp'11 - Proceedings of the 2011 ACM Conference on Ubiquitous Computing page： 487 - 488 2011

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

We propose a simple interaction to transfer information on smart phone to laptop/tablet PCs. We often encounter the situation that we need to send URL, which is preliminary accessed in mobile devices, from mobile devices to personal computers (PCs) to see the web page with wider screen. To support this information transfer, we utilize combination between vibrator in smart phones and accelerometer in laptop/tablet PCs. URL information is encoded to vibration patterns, and the patterns are detected and decoded by accelerometer in PCs. We demonstrate the interaction's efficiency and reasonability with actual products. © 2011 Authors.

DOI： 10.1145/2030112.2030184

Scopus

C-1-Symmetric Rh/Phebox-Catalyzed Asymmetric Alkynylation of alpha-Ketoesters Reviewed

Ohshima Takashi, Kawabata Takahito, Takeuchi Yosuke, Kakinuma Takahiro, Iwasaki Takanori, Yonezawa Takayuki, Murakami Hajime, Nishiyama Hisao, Mashima Kazushi

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 50 ( 28 ) page： 6296 - 6300 2011

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Angewandte Chemie - International Edition

Thinking outside the box: A newly developed C1-symmetric Rh/Phebox complex efficiently catalyzed the asymmetric alkynylation of α-ketoester 1 with various aryl and alkyl substituted terminal alkynes to provide the corresponding chiral tertiary propargylic alcohols with up to 99 % ee (see scheme; TMS=trimethylsilyl). Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

DOI： 10.1002/anie.201100252

Web of Science

Scopus

Transferring Information from Mobile Devices to Personal Computers by Using Vibration and Accelerometer Reviewed

Yonezawa, T; Ito, T; Tokuda, H

UBICOMP'11: PROCEEDINGS OF THE 2011 ACM INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING page： 487 - 488 2011

Lupe: Information access method based on distance between user and sensor nodes using AR technology Reviewed

Takuya Takimoto, Yutaka Karatsu, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

UbiComp'11 - Proceedings of the 2011 ACM Conference on Ubiquitous Computing page： 479 - 480 2011

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

This paper proposes the information access method that is based on the distance between users and objects. In Addition, demonstrate Lupe system, which visualizes WSN status information utilizing our method. The evaluative experiment shows that our method is useful in where a number of sensors are setup. As a result our method and Lupe system enable to easily brows WSN status information for end-user. © 2011 Authors.

DOI： 10.1145/2030112.2030180

Scopus

Lupe: Information Access Method based on Distance between User and Sensor Nodes using AR technology Reviewed

Takimoto, T; Karatsu, Y; Yonezawa, T; Nakazawa, J; Takashio, K; Tokuda, H

UBICOMP'11: PROCEEDINGS OF THE 2011 ACM INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING page： 479 - 480 2011

LECTES : A Low Energy Consumption Time Estimation Scheme for Wireless Sensor Networks

米川賢治, 米澤拓郎, 中澤仁

情報処理学会研究報告 Vol. 2010 ( 2 ) page： 6p 2010.8

LECTES : A Low Energy Consumption Time Estimation Scheme for Wireless Sensor Networks

YONEKAWA Kenji, YONEZAWA Takuro, NAKAZAWA Jin, TOKUDA Hideyuki

IEICE technical report Vol. 110 ( 130 ) page： 41 - 46 2010.7

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人電子情報通信学会

This paper proposes a low energy consumption time estimation scheme for wireless sensor networks (WSNs) called LECTES. In WSN applications, drift of wireless sensor nodes' clocks is one of the most critical issues when processing data. Many researchers have been challenging this problem by proposing time synchronization protocols, such as FTSP, TPSN and RBS. LECTES does not synchronize sensor nodes' clocks, instead, it estimates the sensing time by subtracting the time taken to process data from the reception time of packets. We implemented LECTES on MAC layer of Iris mote, and confirmed that it achieves the average accuracy of 0.488μs as opposed to 1.618μs with FTSP in single hop. The evaluation results further proved that in comparison to FTSP, LECTES 1)increased sensor nodes' lifetimes by 19.8%, 2)decreased the growth of error per hop from 0.694μs to 0.256μs in a 9 hop network, and 3)decreased the compiled program size by 8,046 bytes of ROM and 452 bytes of RAM.

CiNii Research

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Papers - YONEZAWA Takuro