Faculty Profiles - YONEZAWA Takuro

Papers - YONEZAWA Takuro

Division display 181 - 200 of about 307 ／ All the affair displays >>

NiSleep: ゲーミフィケーションを適用可能な睡眠評価 Reviewed

江頭和輝, 古川侑紀, 西山勇毅, 大越匡, 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. 2016-UBI-5 ( 2 ) page： 1 2016

Proceedings of the Second International Conference on IoT in Urban Space, Urb-IoT 2016, Tokyo, Japan, May 24-25, 2016 Reviewed

Urb-IoT 2016 2016

A public vehicle-based urban sensing system Reviewed

Yin Chen, Yutaro Kyono, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

UbiComp and ISWC 2015 - Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the Proceedings of the 2015 ACM International Symposium on Wearable Computers page： 117 - 120 2015.9

Language：English Publishing type：Research paper (international conference proceedings) Publisher：Association for Computing Machinery, Inc

In this poster, we propose a public vehicle-based urban sensing system, where sensor nodes are equipped to public vehicles and collect data as the host vehicle roams around a city. Compared with the urban sensor systems that employ static sensor nodes or personal mobile devices, our proposed system achieves a wide sensing area through the mobility of host vehicles, reduces initial investment by employing existing infrastructures and facilitates system operation and maintenance which can be executed in the car barn(s). In this poster, the system architecture and implementation details are described. A preliminary experiment is conducted to validate the proposed system.

DOI： 10.1145/2800835.2800886

Exploring user model of the city by using interactive public display application Reviewed

Masaki Ogawa, Jin Nakazawa, Takuro Yonezawa, Hideyuki Tokuda

UbiComp and ISWC 2015 - Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the Proceedings of the 2015 ACM International Symposium on Wearable Computers page： 1595 - 1598 2015.9

Language：English Publishing type：Research paper (international conference proceedings) Publisher：Association for Computing Machinery, Inc

In recent years, many technologies have been introduced in the city environment. For example, by interacting with digital public displays, citizens can get more detailed information when they want. These kinds of interactive public displays make interaction between people and digital public displays. By observing user's interaction between people and digital public displays, we consider that we can find external factor of motivating citizens to do some actions. In this paper, we tried to explore the relation between environmental information and user's interaction by using interactive public display application. From the result of field study, we discuss about what makes people to motivate people to action and how to frame user models.

DOI： 10.1145/2800835.2801636

Sensorizer: An architecture for regenerating cyber physical data streams from the web Reviewed

Jin Nakazawa, Takuro Yonezawa, Hideyuki Tokuda

UbiComp and ISWC 2015 - Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the Proceedings of the 2015 ACM International Symposium on Wearable Computers page： 1599 - 1606 2015.9

Language：English Publishing type：Research paper (international conference proceedings) Publisher：Association for Computing Machinery, Inc

World Wide Web contains a huge amount of periodically-updated values originally sensed from the physical world
they include, for example, density of air pollutant, road traffic condition, and car park occupancy. In many cases, however, those data are not easily accessible from a computer program due to the lack of APIs to fetch them. In this paper, to cope with this problem, we propose an architecture for discovering, excavating, and streaming the entombed web contents (EWC). This architecture, called Sensorizer, leverages crowd sourcing for accurate EWC discovery, periodic web scraping with a headless browser for excavation from dynamic web pages, and a standardized communication protocol (XMPP) for data streaming to wide variety of applications.

DOI： 10.1145/2800835.2801627

Senbay: Smartphone-based activity capturing and sharing using sensor-federated video Reviewed

Yuuki Nishiyama, Takuro Yonezawa, Tadashi Okoshi, Jin Nakazawa, Yin Chen, Hideyuki Tokuda

UbiComp and ISWC 2015 - Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the Proceedings of the 2015 ACM International Symposium on Wearable Computers page： 21 - 24 2015.9

Language：English Publishing type：Research paper (international conference proceedings) Publisher：Association for Computing Machinery, Inc

We present Senbay, a novel smartphone-based platform for capturing and sharing synchronously-recorded video/sensor data stream using animated two-dimensional barcode. In the ubicomp environment, mobile devices have enabled us to capture video and various types of sensor data easily. However, currently we do not have a framework to instantly integrate video and those sensor data on smartphones and share them easily with other users on the net. In this paper, we present Senbay, a platform to integrate video and sensor data stream into single video on smartphones. With Senbay, sensor data stream will be embedded into a video as animated QR code in real-time, thus users can share the \\sensor-federated" video easily on the web, through lots of popular video sharing services. This paper introduces the architecture and evaluation of Senbay and discusses future vision of the sensor-federated video sharing platform along with several applications.

DOI： 10.1145/2800835.2800847

MinaQn: Web-based participatory sensing platform for citizen-centric urban development Reviewed

Mina Sakamura, Takuro Yonezawa, Tomotaka Ito, Jin Nakazawa, Hideyuki Tokuda

UbiComp and ISWC 2015 - Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the Proceedings of the 2015 ACM International Symposium on Wearable Computers page： 1607 - 1614 2015.9

Language：English Publishing type：Research paper (international conference proceedings) Publisher：Association for Computing Machinery, Inc

This paper presents MinaQn1, a web-based participatory sensing platform to enhance bidirectional communication between municipality and citizens for citizen-centric urban development. To make cities more comfortable to live, it is necessary for municipality to collect and reect citizens' demands in their administrative works. MinaQn enables city officers to make various questionnaire to citizen easily, and citizen can answer the questionnaire with their location information through any devices by using WEB interface. The answers from citizen are collected as sensor data with unified format and protocol, so that the data can be shared and used for various applications. We designed and implemented MinaQn with web and XMPP technology, and carried out a two weeks experiment in corporation with 3 cities in Japan. Based on the experiment, we measured the effectiveness of MinaQn with qualitative and quantitative data. In addition, we also evaluated how citizens consider about providing their location information to the administrative works of the cities.

DOI： 10.1145/2800835.2801632

Senbay : Smartphone-Based Activity Capturing and Sharing Platform using Sensor-Data Embedded Video

西山勇毅, 米澤拓郎, 中澤仁

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 115 ( 162 ) page： 49 - 54 2015.7

Aqua Mapping : Interaction system with ornamental fish through the aquarium

礒川直大, 西山勇毅, 大越匡, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

情報処理学会研究報告. UBI, [ユビキタスコンピューティングシステム] Vol. 2015 ( 5 ) page： 1 - 8 2015.5

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

It relaxes us and enriches our daily lives to rear fish and appreciate an aquarium. In that case, the aquarium environment and the physical condition management of the fish become important. However, it's difficult that an owner rears aquarium fish interactively based on the state of the fish because fish can't tell the owner about its state. Thus, this study proposes the "Aqua Mapping" which informs an owner about the condition of an aquarium and fish by indicating fish state on the screen set behind the aquarium using the position information. This system can offer interactive rearing environment between an user and fish through an aquarium.

SmileSpot: 他人の笑顔画像の共有によるユーザの笑顔形成への影響評価

佐々木航, 西山勇毅, 大越匡, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

情報処理学会研究報告. UBI, [ユビキタスコンピューティングシステム] Vol. 2015 ( 9 ) page： 1 - 7 2015.5

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

「人は幸福であるが故に笑うのではなく,笑うが故に幸福である」という言説にもある通り笑顔を形成することがユーザの幸福感につながると考えられ,これを支持する研究は多い.幸福感は周囲に伝達することが知られている.以上のことから,幸福な人からの笑顔情報によるユーザの笑顔形成への促進が,ユーザの幸福感を引き起こし,それによって幸福感が伝達していくと考えられる.そこで本研究では,他人の笑顔画像の共有によるユーザの笑顔形成への影響を評価する "SmileSpot" を実装した."SmileSpot" は個人のスマートフォン端末のディスプレイに他人の顔画像を映し出し,それを見た際のユーザの笑顔度を検知する.38 人の被験者を対象とした 15 日間の評価実験から他人の笑顔画像がユーザの笑顔形成を促進させることがわかった.それに加え,女性のほうが男性と比べて影響を受けやすく,また親密度が高い人の笑顔画像のほうが親密度の低い人の笑顔画像より影響を受けることがわかった.

Vinteraction: Vibration-based Information Transfer for Smart Devices Reviewed

Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

2015 EIGHTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORKING (ICMU) page： 155 - 160 2015.3

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

According to the spread of smart devices such as smartphones and smart tablets, opportunities to communicate between them will be more increased. Though we usually use WiFi and Bluetooth, it is still burden task for end-users. Many previous techniques to collaborate devices easily has been also proposed, they are not always best solution in some situations. This paper proposes a new interaction method called Vinteracion, which leverages combination of vibrator and accelerometer to send information from smart device to the other smart device. Vinteraction enables users to use touch interaction like Near Field Communication, which provides easy and intuitive way. We present an algorithm and implementation of vibrationbased communication that can be adapted to any combination of smart devices. We also present several applications which leverages Vinteraction effectively. Through an evaluation by using popular six products, we confirmed that Vinteraction is easy to use transfer method with current products with reasonable performance.

DOI： 10.1109/ICMU.2015.7061059

汎用カメラと一般車両を用いた路面標示の擦り切れ検出手法

河崎隆文, 松本三千人, 米澤拓郎, 中澤仁, 徳田英幸, 打越大成, 岩本健嗣

情報処理学会研究報告. ITS, [高度交通システム] Vol. 2015 ( 3 ) page： 1 - 8 2015.2

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

全国の道路で老朽化が進行している.そのため,自治体による道路の維持管理がより一層求められているが,点検には特殊な車両が必要になり,そのコストが負担となる.また,車両の数が限られていることから,一度に点検できる範囲に限度が生じ,広域における点検が困難である.そこで,自治体の所有するごみ収集車やコミュニティバスなどの公用車の利活用によって,コストの低減や点検の広域化を図るため,本研究では特殊な車両を使用しない道路の点検手法を実現する.本稿では,路面標示の状態収集に着目し,天球カメラと半天球カメラを用いて路面標示を撮影し,その画像から擦り切れの有無を検出する手法を提案する.本稿の実験では天球カメラの RICOH THETA と半天球カメラの QBiC D1 を使用し,それぞれ車両に取り付けて走行した際の撮影と検出実験を行った.

ソーシャルネットワークにおける共通の友人に着目した実世界イベント検出・分類手法

稲村浩, 徳田英幸, 佐藤翔野, 米澤拓郎, 中澤仁, 川崎仁嗣, 太田賢

情報処理学会研究報告. ICS, [知能と複雑系] Vol. 2015 ( 9 ) page： 1 - 6 2015.2

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

近年,SNS 上の情報を使い実世界のイベントを検出・分類する研究が盛んに行われている.既存の研究ではテキスト解析が主であり,発言にイベントに関する内容が含まれていないと,解析が不可能であるという問題が存在する.本研究では,Twitter 上の位置情報付き発言を用いて,ある空間に存在する人々の興味を抽出し,それに基づいた実世界イベントの検出と分類を試みる.提案手法では,空間内のユーザ群の「共通の友人」を分析し,その友人の属性情報を解析することにより,ユーザ群の興味を抽出する.

Sensorizer : An Architecture for Regenerating Cyber Physical Data Streams from Entombed Web Contents

NAKAZAWA Jin, YONEZAWA Takuro, TOKUDA Hideyuki

IEICE technical report. ASN, Ambient intelligence and sensor networks Vol. 114 ( 418 ) page： 249 - 254 2015.1

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

World Wide Web contains a huge amount of open data related to the physical world. They include, for example, density of air pollutant, road traffic condition, and car park occupancy. In many cases, however, those data are entombed in the cyber web space. The values are not easily accessible from a computer program due to the lack of APIs to fetch them. They are updated periodically, making the past data totally inaccessible. To cope with this problem, we propose an architecture for discovering, excavating, and streaming the entombed web contents (EWC). This architecture, called Sensorizer, leverages crowd sourcing for accurate EWC discovery, periodic web scraping with a headless browser for excavation from dynamic web pages, and a standardized communication protocol (XMPP) for data streaming to wide variety of applications. In this paper, we first demonstrate the architecutre and show unique applications based on sensorizing different web pages, and evaluate the architecture.

Classifying Real-world's Events by Analyzing Friends of the Events' Participants in Social Network Reviewed Open Access

IPSJ Journal Vol. 56 ( 1 ) page： 72-82 2015.1

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

Recent progress and spread of smartphones and social network services enables us to transmit text messages with GPS location data anywhere and anytime. Since these location-based SNS messages often refer real-world's events, many researchers have tried to recognize real-world's event through analysis of the messages. In this paper, we define a new index of event classification called popularity, and present a novel method to calculate the index by analysing social network of the events participants. Popularity, which reflects the diversity of event participants, is a useful index of the event for creating various applications such as event navigation or recommendation. We designed and implemented intuitive web-based interactive tool for analysing popularity of events. Through comparative experiments by analysis of proposed system and crowdsourcing, we confirmed that our proposal method provide a certain amount of accuracy for calculating the popularity of events.

An Instruction Method for Gestural Interaction with Interactive Public Media (version 2014/10/16) Reviewed Open Access

IPSJ Journal Vol. 56 ( 1 ) page： 316-328 2015.1

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

Due to price reduction of the device which can display information such as digital display and projector, public media which provides many kinds of information is emerging. In addition, due to price reduction of sensors and improvement of technique of motion capture, gestural and three-dimentional inputs are emerging to interact with digital media. Interactive public media which supports three-dimentional inputs will increase. However, instructing gestural inputs has difficulties which contains nature of publicness and complexity of the interaction itself. In this research, we propose the method of instructing the way of interaction for users. We implemented the prototype which supports gestural input and applied our proposal on it. We carried out field study with our prototype and we got feedback from 72 participants of the field study. In this paper, we describe the result of the experiment and discussion of our proposal.

Encouraging Team Behavior Modification Using Lifelog

西山勇毅, 大越匡, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

IPSJ Journal Vol. 56 ( 1 ) page： 349 - 361 2015.1

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

Recent technological trends on mobile/wearable devices and sensors have been enabling increasing number of people to collect and store their "lifelog" easily in their daily lives. Beyond exercise behavior change of individual user, our research focus is on the behavior change of teams, based on life-logging technologies and information sharing. In this paper, we propose and evaluate six different types of information sharing model among team members for their exercise promotion, leveraging concepts of "competition" and "collaboration". According to our experimental mobile web application for exercise promotion and extensive user study among 64 total users for three weeks, the model with "competition" technique resulted the most effective performance for competitive teams such as sport teams.

A Citizen-centric Approach towards Global-scale Smart City Platform Reviewed

Yonezawa Takuro, Antonio Galache Jose, Gurgen Levent, Matranga Isabel, Maeomichi Hiroyuki, Shibuya Tomonori

2015 INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN INTERNET OF THINGS (RIOT) page： . 2015

A Self-healing Framework for Online Sensor Data Reviewed

Tuan Anh Nguyen, Marco Aiello, Takuro Yonezawa, Kenji Tei

2015 IEEE INTERNATIONAL CONFERENCE ON AUTONOMIC COMPUTING page： 295 - 300 2015

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

In pervasive computing environments, wireless sensor networks (WSNs) play an important role, collecting reliable and accurate context information so that applications are able to provide services to users on demand. In such environments, sensors should be self-adaptive by taking correct decisions based on sensed data in real-time. However, sensor data is often faulty. Faults are not so exceptional and in most deployments tend to occur frequently. Therefore, the capability of self-healing is important to ensure higher levels of reliability and availability. We design a framework which provides self-healing capabilities, enabling a flexible choice of components for detection, classification, and correction of faults at runtime. Within our framework, a variety of fault detection and classification algorithms can be applied, depending on the characteristics of the sensor data types as well as the topology of the sensor networks. A set of mechanisms for each and every step of the self-healing framework, covering detection, classification, and correction of faults are proposed. To validate the applicability, we illustrate a case study where our solution is implemented as an adaptation engine and integrated seamlessly into the ClouT system. The engine processes data coming from physical sensors deployed in Santander, Spain, providing corrected sensor data to other smart city applications developed in the ClouT project.

DOI： 10.1109/ICAC.2015.61

A Robot Control System for Video Streaming Services by Using Dynamic Encoded QR Codes Reviewed

Ogawa Masaki, Yonezawa Takuro, Nishiyama Yuuki, Nakazawa Jin, Tokuda Hideyuki

2015 EIGHTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORKING (ICMU) page： 86-87 2015

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