Faculty Profiles - YONEZAWA Takuro

Papers - YONEZAWA Takuro

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FASH: Detecting tiredness of walking people using pressure sensors Reviewed

Kenji Yonekawa, Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

2009 6th Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services, MobiQuitous 2009 page： 1 - 6 2009

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

The number of elders who encounter falling accidents has been increasing in the past few decades. Falling accidents could cause major injuries, such as having bruise, breaking bone, and in the worst case, losing life. Therefore, preventing elders from falling accidents is important in order to ensure the quality of life. In this paper, we propose Fatigue Alerting SHoes (FASH), a pair of shoes which detects the fatigue of walking people. There are three effects of fatigue on gait, and FASH system acquires all of them to improve the accuracy of fatigue detection. FASH system uses pressure sensors embedded in a pair of shoes to detect the tiredness, and notifies the user of "Tiredness Scale," a scale we defined in order to show the degree of tiredness. Through the evaluation, we affirmed the availability of using pressure sensor to detect accumulation of tiredness. We also confirmed the difference between the physical tiredness and the subjective feeling toward tiredness, which signifies the importance of acknowledging the user of his/her fatigue.

DOI： 10.4108/ICST.MOBIQUITOUS2009.6894

Scopus

Ubiquitous Services Using Sensor Networks : Making Objects Smart and Visualization of Environment(<Special Issue>Sensing Network: Application Edition)

TOKUDA Hideyuki, YONEZAWA Takuro, ITO Masaki

Journal of the Japanese Society for Artificial Intelligence Vol. 23 ( 4 ) page： 447 - 452 2008.7

An Event Desciption Language Using Temporal Relation for Smart Object Services Reviewed

YONEZAWA T., Nakazawa Jin, Sakakibara Hiroshi, Kunito Goro, Nagata Tomohiro, Tokuda Hideyuki

IPSJ Technical Reports Vol. 2008 ( 18 ) page： 75-82 2008.2

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

This paper proposes event description language using temporal relation for creating various services with smart objects. By attaching sensor nodes to everyday objects, users can augment the objects digitally and take the objects into various services. When creating such smart object services, users should define event using physical value from sensors. The most common event is defined by simply describing threshold of sensor value and logical operation. Therefore, when end-users want to define more complex event, they need to use hard programming language such as C or Java. For defining such complex event easily without complex programming language, we propose a new event description language based on temporal relation between simple events.

An Event Desciption Language Using Temporal Relation for Smart Object Services Reviewed

YONEZAWA Takuro, NAKAZAWA Jin, SAKAKIBARA Hiroshi, KUNITO Goro, NAGATA Tomohiro, TOKUDA Hideyuki

IPSJ SIG technical reports Vol. 2008 ( 18 ) page： 75-82 2008.2

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

Area-Based Activity Information Preservation Mechanism for Ubiquitous Sensor Environment Reviewed

Hiroshi Sakakibara, Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

INSS 2008: PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON NETWORKED SENSING SYSTEMS page： 119 - 122 2008

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

Recent years have seen active development of context-aware applications and systems that helps the development. However, it suffers from increasing fears for leakages of users' activity information to other users unconsciously, since the owner of the activity information included in the sensor data is not treated in context-aware systems. We propose the Area-Based Activity Information Preservation (ABAIP) system that enables users to control the level of data resolution of their activity information to allow applications to use. Degrading sensor data resolution causes coarse grained context recognition. The system prevents unconscious and unnecessary activity information leakage amongst the ABAIP system users, while providing ubiquitous sensor environment for various kinds of ubiquitous software.

Web of Science

Markit : Designing and Inplementation of Digital Sclapping System

KAWAZOE Mizuki, YONEZAWA Takuro, TAKASHIO Kazunori, TOKUDA Hideyuki

情報処理学会研究報告ユビキタスコンピューティングシステム（UBI） Vol. 2007 ( 118 ) page： 105 - 112 2007.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人情報処理学会

Spread of information technology has changed the form of information scrapping from only paper media to digital media. However, to scrap information from paper media to digital media is still burden task for users; they must capture information digitally by camera or OCR, and organize information manually. This research focuses to reduce the cost for scrapping physical media as digital media. For this purpose, we propose Markit-scrapping system using marking interaction. Users can capture physical information of their interest digitally only by marking them with sticky. We evaluate the usefulness of Markit interaction through usability test.

CiNii Books

momo!: Mood Modeling and Visualization based on Vital Information

YAMAMOTO Jumpei, TOKUDA Yoshiyuki, KAWAZOE Mizuki, YONEZAWA Takuro, TAKASHIO Kazunori, TOKUDA Hideyuki

UBI Vol. 2007 ( 118 ) page： 79 - 86 2007.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人情報処理学会

Many context analyses have been done in recent years with the high-end sensor equipment. Also, some research work on extracting "atmosphere", which is the feeling that an event or place gives you. However, every atmosphere produced is depended on one's feeling or the mood that they are in, and it is difficult to analyze it in a public space with an existing research. In this research, we try to demonstrate these atmospheres visible with the "momo!" system, by using vital sensors to analyze the mood. The research goal is to apply various services with the technology of atmosphere extraction.

CiNii Books

Self-organizable panel for assembling DIY ubiquitous computing Reviewed

Naohiko Kohtake, Ryo Ohsawa, Takuro Yonezawa, Masayuki Iwai, Kazunori Takashio, Hideyuki Tokuda

PERSONAL AND UBIQUITOUS COMPUTING Vol. 11 ( 7 ) page： 591 - 606 2007.10

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER LONDON LTD

This paper proposes the concept of DIY (do-it-yourself) ubiquitous computing, an architecture allowing non-experts to establish ubiquitous computing environments in the real world. This concept has been implemented in the "u-Texture", which is a self-organizable panel that works as a building block. While the traditional scheme attaches devices such as computers, sensors, and network equipments externally to make everyday objects smart, the u-Texture has these devices built in beforehand to assemble smart objects. The u-Texture can change its own behavior autonomously through recognition of its location, its angle of inclination, and surrounding environment by assembling these factors physically. This paper describes the design, the implementation, and various applications of u-Textures to confirm that the concept can contribute to establishment of ubiquitous computing environments in the real world without expert users.

DOI： 10.1007/s00779-006-0118-z

Web of Science

Scopus

Spot & Snap: An Interaction for Associating Sensor Nodes and Everyday Objects to Realize DIY Smart Object Services

YONEZAWA TAKURO, SAKAKIBARA HIROSHI, NAKAZAWA JIN, TAKASHIO KAZUNORI, TOKUDA HIDEYUKI

IPSJ journal Vol. 48 ( 3 ) page： 1381 - 1392 2007.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人情報処理学会

This paper introduces the concent of DIY (do-it-yourself) Smart Objects Services that enables non-expert users to apply smart object services for everyday life. When using smart object services, a semantic connection between sensor node and domestic objects must be made before services function properly. At home, however, professional assistance with such installation may be either unavailable or too costly. Spot & Snap solves this problem by easing of such association with use of a USB camera and an LED spotlight. With Spot & Snap, nonexpert users can register their belongings to preferred services without experts by taking their pictures. It also provides application framework to create various smart object services. This paper describes the prototype implementation of Spot & Snap and a range of its applications. In addition, it evaluates Spot & Snap through capability and usability experiments.

CiNii Books

Collaboration Scheme Based on Blockable Appliances for Ubiquitous Environment Reviewed

KOHTAKE NAOHIKO, OHSAWA RYO, YONEZAWA TAKURO, TAKASHIO KAZUNORI, TOKUDA HIDEYUKI

IPSJ journal Vol. 48 ( 3 ) page： 1405-1416 2007.3

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

With diffusion of ubiquitous computing environments, it is essential that non-expert users can create ubiquitous computing environment by themselves. Compared with computer users who are mainly engineers or experts, ubiquitous computing users are varied and a friendly user interface is desired. This paper proposes collaboration scheme based on blockable appliances for ubiquitous computing environment. This collaboration scheme has been implemented in the u-Texture II, which is a self-organizable panel that works as a building block. The u-Texture II can change its own behavior through recognition of its location, its inclination, and surrounding environment by assembling these factors physically. This paper describes the design, the implementation, and various applications of u-Texture II to confirm that the collaboration scheme can contribute to establishment of ubiquitous computing environments without expert users.

A Technique for Associating Everyday Objects and Sensor Nodes Reviewed

YONEZAWA Takuro, SAKAKIBARA Hiroshi, NAKAZAWA Jin, NAGATA Tomohiro, TAKASHIO Kazunori, TOKUDA Hideyuki

IPSJ SIG technical reports Vol. 2007 ( 14 ) page： 179-186 2007.2

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

This paper introduces Spot & Snap interaction technique that enables end-users to associate sensor nodes to everyday-life objects easily. By attaching sensor nodes to everyday-life objects, are what we call smart objects, users can augment the objects digitally. When using smart object services, a semantic connection between sensor node and objects must be made before services function properly. At home, however, professional assistance with such installation may be either unavailable or too costly. Spot & Snap solves this problem by easing of such association with use of a USE camera and an LED spotlight. With Spot & Snap, non-expert users can register their belongings to preferred services without experts by taking their pictures. It also provides application framework to create various smart object services. This paper describes the prototype implementation of Spot & Snap and a range of its applications. In addition, it evaluates Spot & Snap through capability and usability experiments.

A Technique for Associating Everyday Objects and Sensor Nodes Reviewed

Yonezawa Takuro, Sakakibara Hiroshi, Nakazawa Jin, Nagata Tomohiro, Takashio Kazunori, Tokuda Hideyuki

Vol. 2007 ( 14 ) page： 179-186 2007.2

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

uPackage - A package to enable do-it-yourself style ubiquitous services with daily objects Reviewed

Yonezawa Takuro, Sakakibara Hiroshi, Koizumi Kengo, Miyajima Shingo, Nakazawa Jin, Takashio Kazunori, Tokuda Hideyuki

UBIQUITOUS COMPUTING SYSTEMS, PROCEEDINGS Vol. 4836 page： 240-+ 2007

uPackage - A package to enable do-it-yourself style ubiquitous services with daily objects Reviewed

Takuro Yonezawa, Hiroshi Sakakibara, Kengo Koizumi, Shingo Miyajima, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

UBIQUITOUS COMPUTING SYSTEMS, PROCEEDINGS Vol. 4836 page： 240 - + 2007

Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPRINGER-VERLAG BERLIN

This paper explores a suitable service model for realizing domestic smart object applications and proposes a software and hardware package called uPackage to support this model. By attaching a tiny wireless sensor node to users' belongings, users can augment the object digitally and take the object into various services such as status monitoring or preventing lost property. The system provided by uPackage supports users to install and manage such smart object services; it enables users to digitally associate sensor nodes with daily objects, manage the associated information and sensor data, and create various smart object applications without professional skills. Initial demonstration to children indicate that the service model provided by uPackage is easy understandable and increases users' acceptance of the wireless sensor node technology.

DOI： 10.1007/978-3-540-76772-5_19

Web of Science

Scopus

Privacy respected ubiquitous sensor environment Reviewed

Hiroshi Sakakibara, Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

INSS 07: Proceedings of the Fourth International Conference on Networked Sensing Systems page： 297 - 297 2007

Synthesis, single crystal X-ray analysis, and TEM for a single-sized Au<inf>11</inf> cluster stabilized by SR ligands: The interface between molecules and particles Reviewed

Nunokawa K., Onaka S., Ito M., Horibe M., Yonezawa T., Nishihara H., Ozeki T., Chiba H., Watase S., Nakamoto M.

Journal of Organometallic Chemistry Vol. 691 ( 4 ) page： 638 - 642 2006.2

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Organometallic Chemistry

An SR-modified Au cluster with a sub-nanometer size, Au 11(S-4-NC5H4)3(PPh3) 7 (1), has been synthesized by NaBH4 reduction of Au(S-py)(PPh3) or by reacting [Au9(PPh3) 8](NO3)3 with HS-4-py in good yield. Its molecular structure has been elucidated by single crystal X-ray diffraction, and TEM observation has been achieved for the first time for this size of SR-modified Au clusters. The core structure is best described in terms of an incomplete icosahedron. CV measurements in CH2Cl2 have suggested that the cluster does not coagulate in solution with significant concentration. © 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jorganchem.2005.09.043

Scopus

Gradually changing expression of singing voice based on morphing Reviewed

Yonezawa T., Suzuki N., Mase K., Kogure K.

9th European Conference on Speech Communication and Technology page： 541 - 544 2005.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：9th European Conference on Speech Communication and Technology

We have developed a method for synthesizing a singing voice by gradually changing the musical expression based on speech morphing. This paper shows the advantages of this method in comparison with the approach of binary discrete transformation between two expressions, confirmed by statistical analyses of perception tests. In order to synthesize different expressional strengths of a singing voice, a "normal" (without expression) voice of a particular singer is used as the base of morphing, and three different expressions, "dark," "whispery" and "wet," are used as the target. Through our experiments, we confirmed i) the proposed morphing algorithm effectively interpolates the expressional strength of a singing voice, ii) an approximate equation of the perceptual sense can be used to calculate the morph ratio at a perceptually linear interval, and iii) our gradual transformation method can generate a natural singing voice from the interpolation of two different expressions.

Scopus

Micro Hot-spot Networking Towards Seamless Service Provider Reviewed

IWAI Masayuki, KOTAKE Naohiko, KADOTA Masaya, TAKAHASHI Gen, YONEZAWA Takuro, MOCHIZUKI Yosuke, MOCHIZUKI Masahiro, SHIMIZU Hirobumi, TOBE Yoshito, TAKASHIO Kazunori, TOKUDA Hideyuki

IPSJ SIG technical reports Vol. 2005 ( 32 ) page： 15 - 21 2005.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Information Processing Society of Japan (IPSJ)

Research for ubiquitous environment has enabled the creation of Smart Environment within a limited part of an indoor colosed enviroment. However, user s require that this same enviroment can be available within a wider span, thus resulting in the need to extend collaboration of services in remote ubiquitous environments. Our research group (Keio University, Tokyo Denki University, and Tokyo Institute of Technology) has created a seamless service collaboration system called "micro-hot-spot", and will report it in this paper.

Micro Hot-spot Networking Towards Seamless Service Provider Reviewed

Iwai Masayuki, Kotake Naohiko, Kadota Masaya, Takahashi Gen, Yonezawa Takuro, Mochizuki Yosuke, Mochizuki Masahiro, Shimizu Hirobumi, Tobe Yoshito, Takashio Kazunori, Tokuda Hideyuki

Vol. 2005 ( 28 ) page： 15-21 2005.3

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

u-Texture: Self-organizable universal panels for creating smart surroundings Reviewed

N Kohtake, R Ohsawa, T Yonezawa, Y Matsukura, M Iwai, K Takashio, H Tokuda

UBICOMP 2005: UBIQUITOUS COMPUTING, PROCEEDINGS Vol. 3660 page： 19 - 36 2005

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER-VERLAG BERLIN

This paper introduces a novel way to allow non-expert users to create smart surroundings. Non-smart everyday objects such as furniture and appliances found in homes and offices can be converted to smart ones by attaching computers, sensors, and devices. In this way, non-smart components that form non-smart objects are made smart in advance. For our first prototype, we have developed u-Texture, a self-organizable universal panel that works as a building block. The u-Texture can change its own behavior autonomously through recognition of its location, its inclination, and surrounding environment by assembling these factors physically. We have demonstrated several applications to confirm that u-Textures can create smart surroundings easily without expert users.

DOI： 10.1007/11551201_2

Web of Science

Scopus

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Papers - YONEZAWA Takuro