Faculty Profiles - YONEZAWA Takuro

Soccer Player Tracking Using Multiple Features for ID Switch Correction in Fixed-View Videos Reviewed

オプティカルフロー視覚刺激は、バーチャルリアリティシステムにおいて無意識の身体動揺と視覚誘発性気分不良を誘発する Reviewed Open Access

住谷昌彦, 金岡晃, 大竹祐子, 米澤拓郎, 青木崇行

日本VR医学会学術大会プログラム・抄録集 Vol. 2025 ( 0 ) page： 10 2025

Mori, Y; Takagi, S; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

8TH INTERNATIONAL ACM WORKSHOP ON MULTIMEDIA CONTENT ANALYSIS IN SPORTS, MMSPORTS 2025 page： 189 - 195 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Mmsports 2025 8th International ACM Workshop on Multimedia Content Analysis in Sports

Player tracking in soccer is becoming more important for tactical analysis and performance evaluation. Many tracking methods have been developed using broadcast videos. However, such videos are often unavailable for amateur matches, such as those in universities or high schools. Fixed-viewpoint cameras are easier to install, but they cannot move or zoom. Because of this, many players appear small in each frame, which makes it hard to detect, identify, and track them. Tracking becomes more difficult when players are close to each other. This often causes ID switches (mistakes in identifying players) and lowers accuracy. To solve this problem, we joined the SoccerTrack Challenge 2025, which focuses on tracking players in videos from fixed-viewpoint cameras. We developed a new method to improve tracking accuracy in this setting. In our method, we divided each frame into multiple regions and detected players in each region. This helped us detect even small players more accurately. We also used features like uniform color, jersey numbers, and goalkeeper identification to correct ID switches and improve tracking performance. As a result, our method achieved a HOTA score of 0.59 and ranked among the top teams in the challenge.

DOI： 10.1145/3728423.3759417

Smartphone-Based Activity Recognition in a LogisticsWarehouse Using Self-supervised Representation Learning Reviewed

Watanabe, K; Kano, K; Hossain, T; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

COMPANION OF THE 2025 ACM INTERNATIONAL JOINT CONFERENCE ON PERVASIVE AND UBIQUITOUS COMPUTING, UBICOMP COMPANION 2025 page： 1067 - 1073 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ubicomp Companion 2025 Companion of the 2025 ACM International Joint Conference on Pervasive and Ubiquitous Computing

To address labor shortages in logistics, digital twins that digitize physical environments are gaining attention, as they enable visualization and simulation-based optimization of warehouse operations. However, digitizing worker activities is particularly challenging due to operational burden and difficulty in adapting to diverse tasks. In response to this issue, we propose a deep learning-based framework for automatic warehouse task recognition using smartphone inertial sensors (accelerometer and gyroscope). Our model combines a CNN pretrained on unlabeled data using SimCLR, a self-supervised representation learning method, to improve generalization, and a Transformer encoder to capture task-level context. We collected data in a logistics warehouse and conducted cross-validation using 6 hours of annotated data from 10 individuals. As a result, the proposed method achieved a weighted F1 score of 0.89, improving by 7 points over the model without pretraining.

DOI： 10.1145/3714394.3756198

SemantiPack: An Efficient Real-World Data Compressor Using Structural and Semantic Metadata Reviewed Open Access

Yoshiteru Nagata, Daiki Kohama, Yoshiki Watanabe, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

IEEE ACCESS Vol. 13 page： 114159 - 114178 2025

Real-time Activity-Aware Video Streaming While Preserving Privacy Reviewed

Shimura, K; Kano, K; Hossain, T; Katayama, S; Urano, K; Taguchi, S; Deguchi, H; Sakai, H; Yonezawa, T; Kawaguchi, N

COMPANION OF THE 2025 ACM INTERNATIONAL JOINT CONFERENCE ON PERVASIVE AND UBIQUITOUS COMPUTING, UBICOMP COMPANION 2025 page： 236 - 240 2025

We present ActStream, a remote communication system that selectively shares the user and objects relevant to their current activities. By combining vision-language models and real-time segmentation, ActStream detects and highlights only activity-relevant elements, enhancing awareness while preserving privacy. The system identifies key objects through user focus or interaction, synthesizes them with the user's image, and streams the result to a remote partner. ActStream aims to provide useful context without exposing unnecessary information, highlighting the potential of selective sharing in privacy-sensitive remote collaboration.

DOI： 10.1145/3714394.3754399

Quantifying Work-Stress in Surgical Intensive Care Unit Nurses: A Multimodal Activity-Aware Physiological Analysis Reviewed Open Access

Hossain, T; Rahaman, MS; Yamashita, K; Kono, A; Guowei, M; Oyama, S; Yonezawa, T

PROCEEDINGS OF THE 2025 ACM INTERNATIONAL SYMPOSIUM ON WEARABLE COMPUTERS, ISWC 2025 Vol. Part of 213533 page： 127 - 133 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings International Symposium on Wearable Computers Iswc

Work-related stress in critical care settings threatens both nurse well-being and patient safety. While understanding and accurately quantifying this stress is important in these high-stakes environments, it remains a significant challenge due to the inherent complexity of clinical workflows and the wide variability in individual stress responses. To address this, our study investigates how physiological signals captured via wearable sensors correspond to nurses' perceived stress during Surgical Intensive Care Unit (SICU) activities. We captured physiological indicators of stress using two wearable devices: a wrist-worn EmbracePlus and an upper arm-worn Apple Watch as nurses engaged in a range of simulated SICU activities. These physiological signals were then synchronized with perceived stress, captured using validated self-report questionnaires. Our analysis shows significant variations in stress responses across different SICU activities, with elevated heart rate variability (HRV) and increased perceived stress observed during physically demanding activities such as ''Patient Transfer''. A machine learning model trained on combined physiological and contextual features related to nursing activities achieved 80% accuracy under leave-one-participant-out cross-validation, demonstrating the potential of wearable sensing for activity-aware stress recognition. Principal Component Analysis (PCA) further showed that the wrist-worn sensor produced more structured and separable HRV patterns than the arm-worn device, suggesting the critical role of sensor placement and device characteristics in reliable stress assessment.

DOI： 10.1145/3715071.3750406

Multi-City Next Location Prediction through Mobility-Derived Multi-Pattern Transfer Learning Reviewed

Haru Terashima, Naoki Tamura, Kazuyuki Shoji, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 33rd ACM International Conference on Advances in Geographic Information Systems page： 1218 - 1221 2025

Mitigating Latency Effects in VR180 Teleoperation via Virtual Robotic Arm Overlay Reviewed

Tsutsui S., Watanabe K., Usami R., Gushi Y., Watanabe Y., Shimura K., Hayashida N., Jimenez F., Urano K., Yonezawa T., Kawaguchi N.

15th International Conference on Mobile Computing and Ubiquitous Networking Icmu 2025 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：15th International Conference on Mobile Computing and Ubiquitous Networking Icmu 2025

Many studies have investigated remote robotic arm operation systems using virtual reality environments. However, conventional VR teleoperation systems suffer from communication latency, which makes it difficult for operators to receive immediate visual feedback of the robot's posture. This mismatch between input and visual feedback may increase cognitive and psychological load and degrade task performance. We propose a teleoperation system that overlays a virtual robotic arm to provide immediate visual feedback of user operation prior to receiving the delayed video from the physical robotic arm. By superimposing a virtual robotic arm on the stereo video, the system enables operators to simultaneously maintain immersion in the remote environment and perceive the input posture of the robotic arm. We evaluated information presentation methods through remote robotic arm task experiments in VR and user feedback. The results confirmed that, under high-latency conditions, the virtual robotic arm display reduced operator anxiety and helped maintain confidence during teleoperation.

DOI： 10.23919/ICMU65253.2025.11219125

MetaUniTour: Enhancing Engagement and Intercultural Understanding through A Metaverse Tourism Platform Reviewed

Matsumoto, K; Watanabe, Y; Shimura, K; Hayashida, N; Katayama, S; Urano, K; Kawaguchi, N; Aoki, S; Leleito, E; Yonezawa, T

2025 INTERNATIONAL CONFERENCE ON METAVERSE COMPUTING, NETWORKING AND APPLICATIONS, METACOM page： 125 - 130 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings 2025 International Conference on Metaverse Computing Networking and Applications Metacom 2025

We propose "MetaUniTour", a remote tourism platform designed to address key limitations in conventional Metaverse-based tourism, including perceptual and experiential asymmetries between tourists and hosts, the lack of collaborative engagement due to individualized exploration and high barriers to participation. MetaUniTour is structured around three core design principles: (1) spatial design that creates "mixed spaces"integrating cultural elements from both tourists and hosts; (2) experience design based on semi-structured, group-oriented activities that balance individual autonomy and collective participation; and (3) a browser-based, device-independent system architecture that ensures broad accessibility. A two-month field deployment, "Reality of Kenya,"virtually connected Higashiyama Zoo in Nagoya, Japan, with Kenya's Maasai Mara and attracted 3,615 participants. A follow-up survey answered by 66 people revealed that over 60% perceived spatial integration between the two locations, also participants found the experience enjoyable and felt a sense of unity through experienced intercultural exchanges. Our findings demonstrate that MetaUniTour offers an effective design framework for fostering symmetrical cultural exchange and immersive shared experiences with any devices, suggesting promising potential for future applications in tourism, education, and cross-cultural communication.

DOI： 10.1109/MetaCom65502.2025.00028

Life Pattern-Based Human Attribute Estimation Using Only GPS Data Reviewed Open Access

Shoji, K; Terashima, H; Tamura, N; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

IEEE ACCESS Vol. 13 page： 131803 - 131822 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEE Access

Analysis of large-scale GPS data enables the summarization and structuring of human mobility characteristics, providing insights into residents' behavior patterns. However, existing methods analyze sequences of individual-derived stay labels, such as home or workplace, which do not accurately reflect actual area functions and can fail to distinguish individuals based on differences in workplaces. This limitation arises because annotating stay locations and purposes in GPS data is challenging due to the complexity of urban structures and constraints on data quality. In this study, we propose ArLPH, a framework that takes only GPS data as input, models mobility from the perspective of 'when and what types of places he/she visited,' and enables the interpretation of life patterns. ArLPH consists of two modules: 'Area Modeling,' which represents urban areas based on usage patterns, and 'Human Modeling,' which represents individuals based on behavior patterns. By the processing flow of area modeling to human modeling, it becomes possible to analyze human mobility while considering area characteristics. Through an evaluation of a large-scale, real-world GPS dataset collected from tens of thousands of smartphone users, we demonstrate that ArLPH enables the characterization of individuals based on their life patterns and estimates attributes such as occupation (e.g., office workers or homemakers) and lifestyle (e.g., those who work frequently on weekends).

DOI： 10.1109/ACCESS.2025.3591811

Feel the Pain: An Interpretable Multimodal Approach for Physiological Signal-Based Pain Detection Reviewed

Tazin, T; Hossain, T; Yamashita, K; Kinoshita, T; Tag, B; Oyama, S; Yonezawa, T; Salim, F

COMPANION PUBLICATION OF THE 27TH INTERNATIONAL CONFERENCE ON MULTIMODAL INTERACTION, ICMI 2025 COMPANION page： 100 - 108 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Icmi 2025 Companion Publication of the 27th International Conference on Multimodal Interaction

Pain assessment is essential in clinical settings, but remains largely subjective, relying on verbal self-reports that are impractical for non-communicative patients. In this study, we propose an interpretable multimodal approach for automatic pain detection using physiological signals. Leveraging 65 participants (23 female, 42 male) multimodal data from the AI4Pain 2025 challenge, we systematically explore the contributions of multiple sensor modalities, Electrodermal Activity (EDA), Blood Volume Pulse (BVP), Respiration (RESP), and Peripheral Oxygen Saturation (SpO<inf>2</inf>) to classify pain into No Pain, Low Pain, and High Pain categories. After careful pre-processing and feature extraction, XGBoost outperformed other machine learning and deep learning models. In particular, the combination of only EDA and BVP features achieved 80% validation accuracy. In addition, the model using combined EDA and BVP features achieved high classification accuracy across all pain levels, particularly for High Pain (AUC = 0.92) and No Pain (AUC = 0.96), demonstrating strong discriminative ability. Using all modalities, the XGBoost model achieved a test accuracy of 60.92%, marking an 8.62% improvement over the multimodal test baseline. Notably, our model outperformed the baseline results across all modalities on both the validation and test sets. Our model also incorporates HRV features derived from BVP and EDA emphasizes interpretability through analysis of permutation feature importance. The results demonstrate that multimodal physiological data, when processed effectively, enable accurate and explainable pain detection, a step toward real-time, deployable pain monitoring systems in healthcare.

DOI： 10.1145/3747327.3764786

Efficient Edge AI Based Annotation and Detection Framework for Logistics Warehouses. Reviewed

Yuki Mori, Yusuke Asai, Keisuke Higashiura, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

CCNC page： 1 - 4 2025

Discovering Emerging Urban Hotspots Using Satellite Imagery and Human Mobility Data Reviewed

Tillayeva, N; Terashima, H; Tamura, N; Shoji, K; Hossain, T; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

DISTRIBUTED, AMBIENT AND PERVASIVE INTERACTIONS, DAPI 2025, PT II Vol. 15803 page： 110 - 120 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Computer Science

Identifying and prioritizing newly emerging points of interest in urban areas is critical for enhancing citizens’ exploration and engagement with their cities. However, traditional discovery channels—such as local media or social networks—often fail to capture real-time urban transformations comprehensively. In this paper, we propose a data-driven methodology that integrates satellite-based change detection with human mobility analytics to reveal, rank, and recommend newly formed or transformed urban hotspots. Specifically, we employ Synthetic Aperture Radar (SAR) Rapid and EAsy Change detection in radar TIme-series by Variation coefficient (REACTIV) to detect structural changes in satellite imagery, and we combine these insights with Area2Vec embeddings derived from BlogWatcher data (2019–2024) to measure shifts in human movement patterns. Our experiments on the rapidly evolving city of Nagoya demonstrate a strong correlation between physical urban transformations and mobility changes, enabling us to pinpoint and prioritize locations with the highest potential appeal. This approach has broad applications for city residents, tourists, businesses, and urban planners by facilitating more informed and timely exploration of dynamic urban spaces.

DOI： 10.1007/978-3-031-92980-9_7

Digitization Methods for a Logistics Warehouse Towards Digital Twin-Driven Optimization Reviewed

Kawaguchi, N; Asai, Y; Kano, K; Takaki, K; Mori, Y; Suzuki, Y; Watanabe, K; Gushi, Y; Katayama, S; Urano, K; Yonezawa, T; Hashiguchi, S

2025 IEEE INTERNATIONAL CONFERENCE ON SMART COMPUTING, SMARTCOMP page： 186 - 193 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings 2025 IEEE International Conference on Smart Computing Smartcomp 2025

The rapid growth of e-commerce, rising consumer expectations, and labor shortages in Japan pose challenges for logistics warehouse optimization. While automation has advanced outbound operations, inbound processes remain inefficient. This study presents a comprehensive approach to digitizing and optimizing large-scale logistics warehouses, with a case study at TRUSCO NAKAYAMA Corp. in partnership with Nagoya University. Key technologies include a large-scale camera array, multi-camera object tracking, and smartphone-based task estimation. Our contributions include real-time tracking of personnel and packages, cooperative annotation for improved object recognition, and synthetic data augmentation. Additionally, truck berth analysis and indoor localization enhance operational efficiency. To optimize worker shifts and warehouse layout, we apply Factorization Machine Quantum Annealing (FMQA), achieving a 37.4% reduction in lead times and a 14.3% decrease in labor hours. A visualization tool enables warehouse operators to make data-driven decisions. This research demonstrates the potential of digital transformation in logistics and provides a scalable framework for broader industry adoption.

DOI： 10.1109/SMARTCOMP65954.2025.00035

CorVS: Person Identification via Video Trajectory-Sensor Correspondence in a Real-World Warehouse Reviewed Open Access

Kano K., Mori Y., Katayama S., Urano K., Yonezawa T., Kawaguchi N.

Proceedings of the 15th International Conference on Indoor Positioning and Indoor Navigation Ipin 2025 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings of the 15th International Conference on Indoor Positioning and Indoor Navigation Ipin 2025

Worker location data is key to higher productivity in industrial sites. Cameras are a promising tool for localization in logistics warehouses since they also offer valuable environmental contexts such as package status. However, identifying individuals with only visual data is often impractical. Accordingly, several prior studies identified people in videos by comparing their trajectories and wearable sensor measurements. While this approach has advantages such as independence from appearance, the existing methods may break down under real-world conditions. To overcome this challenge, we propose CorVS, a novel data-driven person identification method based on correspondence between visual tracking trajectories and sensor measurements. Firstly, our deep learning model predicts correspondence probabilities and reliabilities for every pair of a trajectory and sensor measurements. Secondly, our algorithm matches the trajectories and sensor measurements over time using the predicted probabilities and reliabilities. We developed a dataset with actual warehouse operations and demonstrated the method's effectiveness for real-world applications.

DOI： 10.1109/IPIN66788.2025.11213222

Clustering-Based Multitask Classification for Predictive Consumer Behavior Modeling Reviewed

Park, S; Hossain, T; Yonezawa, T; Kawaguchi, N

2025 INTERNATIONAL CONFERENCE ON ACTIVITY AND BEHAVIOR COMPUTING, ABC 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2025 International Conference on Activity and Behavior Computing Abc 2025

Understanding customers and segmenting in an appropriate way play a vital role in business operations and effective marketing strategies. It helps target specific customer groups for increased engagement and profit. However, traditional approaches often struggle to predict future purchase patterns, especially when user data is sparse and fragmented across multiple sources. This research proposes a novel clustering-based multitask classification method to address these limitations. We integrated the Recency, Frequency Monetary (RFM) model to cluster customers based on their purchase patterns from various purchase categories (tickets, merchandise, fan club membership) to create a more comprehensive understanding of loyalty for a professional basketball team in Japan. The proposed model predicts a customer’s segment across all purchase categories, implying the potential relationships between each category. Initial results demonstrate that the model effectively analyzes purchase behaviors, offering actionable insights to enhance marketing strategies.

DOI： 10.1109/ABC64332.2025.11118620

Towards Internet of Realities-Vision and Challenges Reviewed

Yonezawa T.

Proceedings 2025 IEEE International Symposium on Emerging Metaverse Isemv 2025 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings 2025 IEEE International Symposium on Emerging Metaverse Isemv 2025

The evolution of information technology is diversifying the concept of 'reality,' creating challenges such as the fragmentation of individual experiences and societal division. We propose the 'Internet of Realities' (IoR), a research vision to address these issues by securely connecting and mediating diverse realities. The IoR framework handles not only objective 'facts' but also subjective individual 'realities' and collective 'shared realities.' To achieve this, it presents key terminology and a reference architecture based on three pillars: Reality Embedding (modeling realities), Reality Hosting (managing realities), and Reality Networking (connecting realities). We demonstrate the framework's effectiveness through applications like remote communication, virtual tourism, and a large-scale field experiment, and calls for collaborative research within an interdisciplinary community.

DOI： 10.1109/ISEMV67326.2025.00035

Joint Black-Box Optimization of Warehouse Layout and Worker Assignment Using Quantum Annealing and Factorization Machines Reviewed

Takaki K., Asai Y., Katayama S., Urano K., Yonezawa T., Kawaguchi N.

Conference Proceedings IEEE International Conference on Systems Man and Cybernetics page： 4837 - 4844 2025

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Conference Proceedings IEEE International Conference on Systems Man and Cybernetics

As global demand for logistics continues to grow, improving the efficiency of warehouse operations has become increasingly important. While many processes in logistics warehouses have been automated, the receiving area still relies heavily on manual work. Therefore, optimizing this area is essential. When optimizing operations in a logistics warehouse, various problems must be considered, such as layout design and worker assignment. Previous research has typically focused on these problems individually. However, because they are closely related, jointly optimizing them can further improve overall efficiency. In this study, we focus on the receiving area and conduct joint optimization of layout design and worker assignment. Specifically, we extend and apply a black-box optimization method called FMQA, which combines Factorization Machines (FM) with Quantum Annealing (QA). By using Factorization Machine regression, we build an objective function from simulator data. We then use Quantum Annealing to minimize it and improve the receiving area. A comparison with an actual warehouse environment, using the multi-agent simulator, shows that our approach can reduce mean package processing time by up to 22.1%. This result demonstrates the effectiveness of joint optimization of layout design and worker assignment.

DOI： 10.1109/SMC58881.2025.11342838

共通潜在空間を介した多様な都市データのクロスモーダル分析手法 Open Access

田村直樹, 寺島青, 庄子和之, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

第84回UBI研究会 2024.11

時系列滞在頻度傾向と移動傾向を組み合わせた移動先予測手法 Open Access

寺島青, 髙木峻, 田村直樹, 庄子和之, Tahera Hossain, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

第84回UBI研究会 2024.11

EngagedSync ： MR 共有空間内ユーザの相互状況理解向上のための適応的な周辺環境情報抽出・転送システム Open Access

志村魁哉, 加納一馬, Tahera Hossain, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

第84回UBI研究会 2024.11

自律移動ロボットを用いた人流計測のための探索経路生成 Reviewed Open Access

下里浩昇, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

情報処理学会論文誌 Vol. 65 ( 10 ) page： 1511 - 1522 2024.10

DiverCityMeter: GPSデータのみを用いた生活パターン多様性から見る COVID-19 の影響分析に関する研究

庄子和之，寺島青，田村直樹，片山晋，浦野健太，米澤拓郎，河口信夫

第112回MBL研究会 2024.9

遠隔MRロボットアーム制御によるスマートな3Dスキャンシステム

宇佐美龍斗、渡邉企章、具志祐希、筒井秀斗、渡辺圭貴、加納一馬、相川雄也、志村魁哉、林田望海、浦野健太、米澤拓郎、河口信夫

第29回日本バーチャルリアリティ学会大会 2024.9

スマートフォン・全方位カメラを用いた作業効率化のための半自動天伏図作成システム

小濱大輝，永田吉輝，安武和成，酒見和幸，片山晋，浦野健太，米澤拓郎，河口信夫

令和6年度空気調和・衛生工学会大会 2024.9

Autoware-in-Forest: 森林環境における丸太運搬フォワーダの自動走行

浦野健太, 米澤拓郎, 河口信夫

第42回日本ロボット学会学術講演会（RSJ2024） 2024.9

3次元点群解析に基づくロボット移動可能領域の半自動認識手法

相川雄也，片山晋，浦野健太，米澤拓郎，河口信夫

第42回日本ロボット学会学術講演会（RSJ2024） 2024.9

エッジ音声処理とCAN通信を用いた多数接続可能な発話方向推定システム

市川　直人，加納　一馬，永田　吉輝，片山　晋，浦野　健太，米澤　拓郎，河口　信夫

電気・電子・情報関係学会東海支部連合大会 2024.8

物流倉庫におけるスマートフォンを用いた作業者のタスク認識

渡邊企章，加納一馬，片山晋，浦野健太，米澤拓郎，河口信夫

電気・電子・情報関係学会東海支部連合大会 2024.8

マルチカメラによるオクルージョン回避を用いた荷物置き場の占有状況検出

具志祐希，加納一馬，片山晋，浦野健太, 米澤拓郎, 河口信夫

電気・電子・情報関係学会東海支部連合大会 2024.8

天伏図自動復元のための設備位置・形状アライメント手法

小濱大輝，永田吉輝，安武和成，片山晋，浦野健太，米澤拓郎，河口信夫

第42回電気設備学会全国大会 2024.8

アノテーションロスを克服するラベル付き画像セグメントの合成によるデータ拡張

加納一馬，森裕輝，東浦圭亮，Tahera HOSSAIN，片山晋，浦野健太，米澤拓郎，河口信夫

画像電子学会年次大会（MCC2024） 2024.8

NSP-BERT：滞在時間を考慮に入れた効率的なNext Stay予測手法 Reviewed

寺島青, 田村直樹, 庄子和之, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

マルチメディア，分散，協調とモバイル(DICOMO2024)シンポジウム page： 1531 - 1537 2024.6

エッジAI向け物体検出モデル作成におけるアノテーション効率化手法 Reviewed

森裕輝, 浅井悠佑, 東浦圭亮, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

マルチメディア，分散，協調とモバイル(DICOMO2024)シンポジウム page： 292 - 301 2024.6

効率と安全を考慮したコストマップを用いた人と協調する倉庫内配送ロボットナビゲーション Reviewed Open Access

浅井悠佑, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

情報処理学会論文誌 Vol. 65 ( 6 ) page： 1033 - 1048 2024.6

スマートフォンを用いた歩行者自律航法のための水平加速度に基づいた歩き方の違いに頑健な進行方向推定 Reviewed Open Access

加納一馬，吉田拓人，浦野健太，米澤拓郎，河口信夫

情報処理学会論文誌 Vol. 65 ( 6 ) page： 1001 - 1017 2024.6

プライバシフリーな通過情報を用いた大規模施設における移動経路推定手法 Reviewed Open Access

永田吉輝, 浦野健太, 米澤拓郎, 河口信夫

情報処理学会論文誌 Vol. 65 ( 6 ) page： 1018 - 1032 2024.6

BERTに基づく都市における移動エリア予測手法の提案 Open Access

寺島青, 田村直樹, 庄子和之, 片山晋, 浦野健太, 米澤拓郎, 河口信夫

第119回MBL研究会 2024.5

SafariCast:サファリ地域における動物のストレスを考慮した位置情報共有システム Open Access

志村魁哉, 片山晋, 浦野健太, Emanuel Leleito, 米澤拓郎, 河口信夫

第82回UBI研究会 2024.5

量子アニーリングとブラックボックス最適化を用いた倉庫内業務最適化 Open Access

髙木魁利，瀧上昂希，片山晋，浦野健太，米澤拓郎，河口信夫

第82回UBI研究会 2024.5

Wildlife Spotting and Sharing System for Kenyan Safari Game Drives Reviewed

Shimura K., Katayama S., Urano K., Leleito E., Yonezawa T., Kawaguchi N.

ACM International Conference Proceeding Series page： 150 - 153 2024.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ACM International Conference Proceeding Series

Traditional wildlife spotting on Kenyan Safari Game Drives, rooted in visual scouting and sporadic communication, encounters challenges in animal detection efficiency and environmental preservation. In light of rejuvenating post-pandemic tourism and enhancing safari experiences, this study proposes a wildlife spotting and sharing system. The methodology melds wildlife detection and sharing technologies, anchored by three core principles: preserving chance of encounters, regulating information accessibility, and endorsing environmental conservation. The system architecture employs sensors, GPS, and tablet terminals for real-Time data acquisition, animal identification, and information propagation. This approach aims to nurture an engaging, efficient, and eco-conscious wildlife spotting and sharing experience, potentially setting a benchmark for sustainable wildlife tourism in similar wildlife-rich regions.

DOI： 10.1145/3627050.3630727

360 Robot Hand System for Omni-directional Interaction by Multiple Users Reviewed

Watanabe Y., Hayashida N., Katayama S., Urano K., Yonezawa T., Kawaguchi N.

ACM International Conference Proceeding Series page： 295 - 299 2024.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ACM International Conference Proceeding Series

The rise of diverse digital environments like digital twins and the metaverse emphasizes the importance of telepresence methods for linking users across different spaces. These methods aim to boost communication and services between these spaces. This paper introduces RHS360, a 360-degree robot hand system designed for inter-spatial communication. RHS360 ensures the robot hand aligns precisely with the user in cyberspace, adjusting based on the user's movements in the virtual realm. This enables the robot hand not only to aid communication and gestures but also to convey crucial social cues, enhancing the overall communication experience. Additionally, a user survey was conducted, revealing that observing the robot hand's movements significantly improved understanding their partner's thoughts and fostered a greater sense of intimacy. These findings suggest that the proposed method enhances communication between different spaces.

DOI： 10.1145/3627050.3631573

360 Robot Hand Interaction for Group Telepresence with MetaPo Reviewed

Watanabe Y., Hayashida N., Katayama S., Urano K., Yonezawa T., Kawaguchi N.

ACM International Conference Proceeding Series page： 183 - 185 2024.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ACM International Conference Proceeding Series

In this demonstration paper, we present the RHS360, a 360-degree robotic hand system designed to facilitate communication across spatial domains. The RHS360 is capable of providing continuous alignment between the user's position in the cyber space and the robotic hand's position. Furthermore, it allows users in the cyber space to reposition the robotic hand to accommodate their movements within the space. Our system not only enables communication, including gestures, through the use of the robotic hand but also provides essential social cues that are crucial in effective communication.

DOI： 10.1145/3627050.3630730

Establishment of a simple screening system targeting hepatitis B preS1 and NTCP interaction Reviewed

Yamamoto, Y; Horibuchi, K; Fukasawa, M; Yokogawa, M; Shimizu, Y; Yonezawa, T; Ikeda, K; Asami, J; Shimizu, T; Ohto, U; Osawa, M; Noguchi, K

CANCER SCIENCE Vol. 115 page： 188 - 188 2024.3

Theme 4: Infrastructure and Service Resilience for Smart Society Reviewed

Stylios, C; Yonezawa, T

ERCIM NEWS ( 136 ) page： 10 - 10 2024.1

Towards a Real-Time and Energy-Efficient Edge AI Camera Architecture in Mega Warehouse Environment Reviewed

Asai, Y; Mori, Y; Higashiura, K; Yokoyama, K; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

2024 IEEE 3RD REAL-TIME AND INTELLIGENT EDGE COMPUTING WORKSHOP, RAGE 2024 page： 12 - 17 2024

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings 2024 IEEE 3rd Real Time and Intelligent Edge Computing Workshop Rage 2024

In response to the exponential growth of e-commerce, our paper addresses the transformation of warehouse operations towards mega warehouses, necessitating advanced digitalization. We focus on the integration and optimization of edge AI technologies to enhance operational efficiency, accuracy, and timeliness in logistic warehouses. We propose a novel edge AI architecture tailored to the processes of warehouse operations ensuring that digitalization aligns with operational workflows. Utilizing a real-world warehouse equipped with over 60 cameras as a testbed, we demonstrate the practical application and benefits of edge computing in logistics. Our experiments have shown significant potential improvements in energy efficiency and timeliness, crucial metrics for the successful integration of edge AI technologies in warehouses.

DOI： 10.1109/RAGE62451.2024.00010

Semi-Automated Framework for Digitalizing Multi-Product Warehouses with Large Scale Camera Arrays Reviewed

Higashiura, K; Yokoyama, K; Asai, Y; Shimosato, H; Kano, K; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

2024 IEEE INTERNATIONAL CONFERENCE ON PERVASIVE COMPUTING AND COMMUNICATIONS, PERCOM page： 98 - 105 2024

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2024 IEEE International Conference on Pervasive Computing and Communications Percom 2024

As global demand for logistics continues to grow, optimizing the automation and efficiency of distribution warehouse operations is of paramount importance. Digitalizing warehouse environments, which refers to the process of sensing the physical space and extracting meaningful information from the obtained data, offers a promising solution to this challenge. However, converting raw warehouse data, such as video footage captured inside the warehouse, into actionable metadata (e.g., tracking the movement paths of workers and products or analyzing the usage patterns of different warehouse locations) often necessitates significant human intervention. The rise of machine learning further complicates this, as it requires the manual preparation of extensive training datasets. In this paper, we introduce a framework that semi-automates the digitalization process in complex warehouse settings. This framework employs dense optical flow and representation learning to autonomously segment warehouse objects and cluster similar objects, thereby substantially cutting down on annotation costs. To evaluate our approach, we constructed a large-scale data collection platform with over 60 fixed cameras in a real-world logistics warehouse, and the video data from this platform was then applied to our framework. Our evaluations indicate that our method markedly reduces both the time and resources required for warehouse digitalization using the captured video data.

DOI： 10.1109/PERCOM59722.2024.10494498

Balancing Excitement and Environmental Conservation in Information Dissemination for Safari Game Drives Reviewed

Shimura, K; Katayama, S; Urano, K; Leleito, E; Yonezawa, T; Kawaguchi, N

DISTRIBUTED, AMBIENT AND PERVASIVE INTERACTIONS, PT I, DAPI 2024 Vol. 14718 page： 311 - 323 2024

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics

In the context of Kenyan Safari Game Drives, which traditionally rely on visual scouting and intermittent communication, challenges arise regarding the effectiveness of animal detection and environmental conservation. Consequently, animals experience stress, and tourists encounter difficulties in observation due to obstruction by other visitors. Addressing these challenges involves maintaining animal welfare while enhancing tourist satisfaction. To revitalize post-pandemic tourism and enrich safari experiences, this study proposes a wildlife spotting and sharing system. The proposed method integrates wildlife detection and sharing technologies guided by three core principles: preserving encounter serendipity, regulating information access, and promoting environmental conservation. The system architecture incorporates sensors, GPS, and tablet terminals to facilitate real-time data collection, animal identification, and information dissemination. This approach aims to foster an engaging, efficient, and environmentally conscious wildlife spotting and sharing experience, potentially establishing a model for sustainable wildlife tourism in comparable wildlife-rich regions.

DOI： 10.1007/978-3-031-59988-0_19

Area Modeling using Stay Information for Large-Scale Users and Analysis for Influence of COVID-19. Reviewed

Demo: Assisting System for Creating Ceiling Plan Using a Video from a Smatrphone. Reviewed Open Access

Daiki Kohama, Yoshiteru Nagata, Kazushige Yasutake, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 22nd Annual International Conference on Mobile Systems, Applications and Services(MobiSys) page： 620 - 621 2024

Poster: Sustainable Data Management Flow for Spatio-Temporal Datasets. Reviewed Open Access

Yoshiteru Nagata, Daiki Kohama, Yoshiki Watanabe, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 22nd Annual International Conference on Mobile Systems, Applications and Services(MobiSys) page： 688 - 689 2024

Kazuyuki Shoji, Shunsuke Aoki 0001, Takuro Yonezawa, Nobuo Kawaguchi

CoRR Vol. abs/2401.10648 2024

Unveiling Human Attributes through Life Pattern Clustering using GPS Data Only Reviewed Open Access

Kazuyuki Shoji, Haru Terashima, Nobuo Kawaguchi, Shin Katayama, Kenta Urano, Takuro Yonezawa, Naoki Tamura

Proceedings of the 32nd ACM International Conference on Advances in Geographic Information Systems page： 621 - 624 2024

Time-series Stay Frequency for Multi-City Next Location Prediction using Multiple BERTs Reviewed

Haru Terashima, Shun Takagi, Naoki Tamura, Kazuyuki Shoji, Tahera Hossain, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 2nd ACM SIGSPATIAL International Workshop on Human Mobility Prediction Challenge page： 5 - 9 2024

Enhancing Group Telepresence Interaction through Seamless Inverse Panorama Projection on Spherical Display Reviewed

Hayashida, N; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

COMPANION OF THE 2024 ACM INTERNATIONAL JOINT CONFERENCE ON PERVASIVE AND UBIQUITOUS COMPUTING, UBICOMP COMPANION 2024 page： 286 - 289 2024

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ubicomp Companion 2024 Companion of the 2024 ACM International Joint Conference on Pervasive and Ubiquitous Computing

In recent years, advancements in telepresence technology have made remote communication and collaboration easier. MetaPo is a system that uses spherical displays to seamlessly integrate physical and digital interactions. However, conventional inverse panorama techniques face challenges such as image seams, coverage issues, and overlapping displays. To address these challenges, this study proposes an inverse panorama technique based on coordinate transformation, enhancing visual continuity and user experience. Additionally, evaluation methods necessary to demonstrate the effectiveness of the proposed method in improving the quality of remote communication have been devised. This research provides a novel solution to challenges in spherical display technology and paves the way for more immersive telepresence experiences.

DOI： 10.1145/3675094.3678369

Demonstration:Remote 3D Scanning with VR and Robotic Arm Reviewed

Usami, R; Watanabe, K; Gushi, Y; Tsutsui, S; Watanabe, Y; Kano, K; Aikawa, Y; Shimura, K; Hayashida, N; Urano, K; Yonezawa, T; Kawaguchi, N

COMPANION OF THE 2024 ACM INTERNATIONAL JOINT CONFERENCE ON PERVASIVE AND UBIQUITOUS COMPUTING, UBICOMP COMPANION 2024 page： 201 - 204 2024

Although VR headsets have gained widespread acceptance, their potential for real-world actuation remains underexplored. We propose a system that allows to work in VR space using a robotic arm and VR headset, focusing on 3D scanning as the task. The robotic arm is equipped with an RGB-D camera to achieve remote 3D scanning. This system enables immersive remote work and enhances the link between real space and VR space by reproducing the real objects into the VR space.

DOI： 10.1145/3675094.3677548

Composite Image Generation Using Labeled Segments for Pattern-Rich Dataset without Unannotated Target Reviewed Open Access

Kano, K; Mori, Y; Higashiura, K; Hossain, T; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

COMPANION OF THE 2024 ACM INTERNATIONAL JOINT CONFERENCE ON PERVASIVE AND UBIQUITOUS COMPUTING, UBICOMP COMPANION 2024 page： 507 - 512 2024

Although object detection technology using cameras offers potential for various applications, it incurs dataset creation costs to train new models where general-purpose models are ineffective, such as in industrial settings. We have previously developed a semi-automated annotation framework that employs optical flow and representation learning techniques to reduce human effort significantly. However, it was likely to cause unintended annotation omissions and mistakes compared to manual annotation. In this study, we propose a composite image generation approach to create omission-free and pattern-rich datasets. The proposed method synthesizes natural-looking images without unannotated targets by placing labeled foreground segments at their original positions on targetless background frames collected with the same fixed-point cameras. Evaluation with video footage in a logistics warehouse confirmed that improved dataset reliability led to higher model performance.

DOI： 10.1145/3675094.3678447

Additive Compositionality in Urban Area Embeddings Based on Human Mobility Patterns Reviewed

Naoki Tamura, Haru Terashima, Kazuyuki Shoji, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 32nd ACM International Conference on Advances in Geographic Information Systems page： 577 - 580 2024

OpenUAS: Embeddings of Cities in Japan with Anchor Data for Cross-city Analysis of Area Usage Patterns. Reviewed

Naoki Tamura, Kazuyuki Shoji, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

CoRR Vol. abs/2407.19872 2024

A Semi-Automated Ceiling Plan Generation System Using a Smartphone / an Omnidirectional Camera for Efficiency-Enhancing Reviewed Open Access

Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan Vol. 2024.10 ( 0 ) page： 485 - 488 2024

Performance Evaluation of KNIME Low Code Platform in Deep Learning Study and Optimal Hyperparameter Tuning Reviewed

Thongkhome P., Yonezawa T., Kawaguchi N.

IEEE Region 10 Annual International Conference Proceedings TENCON page： 1373 - 1376 2024

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEE Region 10 Annual International Conference Proceedings TENCON

A low-code platform is a software development environment that allows for the creation of applications through graphical user interfaces and configuration instead of traditional hand-coded computer programming. In this study, the application to classify a dataset of traffic sign images using the KNIME low-code deep learning development platform will be discussed to represents this software performance especial in term of model optimization processes. By creates the workflow to perform image preprocessing, create the CNN layer under KERAS sequential API and finding the best set of key hyperparameters among traditional KNIME build-in optimization algorithm including Brute force, Hill climbing, random search, Bayesian Optimization and black-box optimizer Optuna optimization algorithm under 3 types CNN architecture as simple CNN, Resnet-50 and VGG16 to classify traffic sign images. The result demonstrates that both grid search and random search optimization can be effective, while both Optuna and Bayesian optimization stands out as a powerful method due to its ability to efficiently explore the hyperparameter space and achieve superior results to meet 99% accuracy under simple CNN environment, but Optuna is significantly improve optimization times than Bayesian about 7 - 8 times. The KNIME low-code platform provides a user-friendly environment for developing and fine-tuning models to contribute the ongoing progress in machine learning and deep learning research development.

DOI： 10.1109/TENCON61640.2024.10903074

Physiologically Expressive Robotic Hand as a Lifelike Presence Reviewed

Yonezawa, T; Meng, XS; Wan, X

SOCIAL COMPUTING AND SOCIAL MEDIA, PT III, SCSM 2024 Vol. 14705 page： 61 - 77 2024

In this study, we propose a robot hand that demonstrates a combination of various voluntary grips and involuntary physiological expressions on the skin as a tactile expression representing emotions. The robot hand is implemented using skin expressions such as variable gripping strength and speed, goosebumps, perspiration, and temperature, which can be tactually perceived by the user. The focus is on how human impressions of the robot change in human–robot touch communication, and we evaluated the combination of various conditions. By combining involuntary physiological expressions on the skin (goosebumps, sweating, and body temperature) with the grip of a hand robot as a tactile voluntary expression, we investigated the influence of the difference in expression between the robot’s fear–stress context and the normal context on the impression of the robot. We particularly focused on how the robot’s tangible expressions affect the user’s emotions, such as fears corresponding to the experimental context, and we analyzed whether this would lead to a sense of empathy, discomfort, etc. We confirmed that the user’s empathy, which could not be elicited by involuntary expressions alone, tended to be elicited by a combination of voluntary and involuntary expressions and that this tendency differed depending on the type of involuntary expressions.

DOI： 10.1007/978-3-031-61312-8_5

Snuggling Robot at Different Positions Based on User's Facial Expressions Reviewed

Yonezawa, T; Matsuyama, H; Wan, X; Matsumura, N

2024 JOINT 13TH INTERNATIONAL CONFERENCE ON SOFT COMPUTING AND INTELLIGENT SYSTEMS AND 25TH INTERNATIONAL SYMPOSIUM ON ADVANCED INTELLIGENT SYSTEMS, SCIS&ISIS 2024

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2024 Joint 13th International Conference on Soft Computing and Intelligent Systems and 25th International Symposium on Advanced Intelligent Systems Scis and Isis 2024

This study proposes a pet robot designed to enhance emotional interaction with users by adapting its behavior based on the recognition of facial expressions. The proposed system enables the robot to interpret a user's smile as an invitation to approach directly, while a sad expression prompts it to move closer in a comforting manner. Interaction results indicated that the robot's movement away from the user elicited feelings of loneliness and discomfort, whereas movements toward the user, alongside gentle snuggling and rotational gestures, fostered a sense of familiarity and reassurance.

DOI： 10.1109/SCISISIS61014.2024.10760154

CrowdFlowTransformer: Capturing Spatio-Temporal Dependence for Forecasting Human Mobility Invited

Trusted Inter-Reality基盤における利用主体に関するトラスト Invited Reviewed Open Access

金岡晃, 米澤拓郎

情報処理学会論文誌 Vol. 64 ( 12 ) page： 1590 - 1598 2023.10

Choya T, Tamura N, Katayama S, Urano K, Yonezawa T, Kawaguchi N

PerCom Workshops page： 496 - 501 2023.3

Understanding Regional Characteristics Through EC Data Analysis. Reviewed

Kohei Yamaguchi, Kazuyuki Shoji, Naoki Tamura, Namiki Sakakura, Yuki Matsukura, Yu Hiranaga, Kohei Shimomura, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

HCI (26) Vol. 14036 page： 390 - 404 2023

Panoramic Ceiling Image Synthesis Method Prioritizing Fixture Outlines using an Omnidirectional Camera. Reviewed

Daiki Kohama, Yoshiteru Nagata, Kazushige Yasutake, Kenta Urano, Shin Katayama, Takuro Yonezawa, Nobuo Kawaguchi

Fourteenth International Conference on Mobile Computing and Ubiquitous Network(ICMU) page： 1 - 8 2023

Panoramic Ceiling Image Synthesis Method Prioritizing Fixture Outlines using an Omnidirectional Camera Reviewed

Kohama, D; Nagata, Y; Yasutake, K; Urano, K; Katayama, S; Yonezawa, T; Kawaguchi, N

2023 FOURTEENTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK, ICMU 2023

Open-Domain Dialogue Management Framework Across Multiple Device for Long-Term Interaction. Reviewed

Shin Katayama, Nozomi Hayashida, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

HCI (3) Vol. 14013 page： 354 - 365 2023

Digitization and Analysis Framework for Warehouse Truck Berth Reviewed

Yokoyama, K; Katayama, S; Urano, K; Yonezawa, T; Kawaguchi, N

2023 FOURTEENTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK, ICMU 2023

Digitization and Analysis Framework for Warehouse Truck Berth Reviewed

Yokoyama K., Katayama S., Urano K., Yonezawa T., Kawaguchi N.

2023 14th International Conference on Mobile Computing and Ubiquitous Network Icmu 2023 2023

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2023 14th International Conference on Mobile Computing and Ubiquitous Network Icmu 2023

In distribution warehouses, various forms of data transformation are underway, such as the conversion of data related to receiving and inventory management. Distribution warehouses have designated areas known as truck berths, where trucks are parked for loading/unloading. While data collection is expected to enhance work efficiency at these truck berths, there is no data regarding the status of work in progress in the unloading space, and no system is in place to analyze the work. Consequently, it is unclear which tasks are problematic and how to enhance efficiency. To address this issue, this paper proposes a framework for analyzing the loading/unloading situation at truck berths with the objective of enhancing berth utilization efficiency and work efficiency. Specifically, we employed a fixed camera for object detection through instance segmentation. This approach enables us to understand the situation of trucks, unloading spaces, and workers. The training data were annotated using a large amount of real-world data, allowing for the measurement and analysis of the efficiency of loading/unloading operations. By calculating the amount of cargo based on the floor space, we assessed the efficiency of unloading operations per truck. Through the analysis of both efficient and inefficient operations, insights for enhancing work efficiency were provided.

DOI： 10.23919/ICMU58504.2023.10412228

Gait-Robust Heading Estimation Using Horizontal Acceleration for Smartphone-based PDR Reviewed

Kano K., Yoshida T., Katayama S., Urano K., Yonezawa T., Kawaguchi N.

Ceur Workshop Proceedings Vol. 3581 2023

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ceur Workshop Proceedings

This study tackles heading estimation for Pedestrian Dead Reckoning (PDR) with smartphones. In dealing with changes in the holding posture of smartphones, it works to consider the relationship between sensor orientation and heading. However, the existing methods lack robustness to various gaits, such as sideways and backward walking. Therefore, we propose a novel method considering various spatiotemporal features of horizontal acceleration with deep learning. The proposed method calculates horizontal acceleration in the global coordinate system from measured acceleration, gravitational acceleration, and rotation vector. Then, it inputs the horizontal acceleration over a certain period into a deep neural network model and predicts the unit vector directed to the mean heading during that period. We created a dataset covering multiple gaits and evaluated the method using four models: Convolutional Neural Network (CNN), Bidirectional Long Short-Term Memory (BiLSTM), DualCNN-LSTM, and DualCNN-Transformer. Consequently, we found that the proposed method was more robust to gaits than the existing methods, with the DualCNN-LSTM and DualCNN-Transformer models achieving the highest accuracy.

Gait-Robust Heading Estimation Using Horizontal Acceleration for Smartphone-based PDR. Reviewed

Kazuma Kano, Takuto Yoshida, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

IPIN-WiP 2023

Mobility Link XR: Interspace Interaction System in Electric Wheelchair. Reviewed

Nozomi Hayashida, Hironori Shimosato, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

HCI (44) Vol. 1833 CCIS page： 314 - 320 2023

ER-Chat: A Text-to-Text Open-Domain Dialogue Framework for Emotion Regulation Reviewed

Shin Katayama, Shunsuke Aoki, Takuro Yonezawa, Tadashi Okoshi, Jin Nakazawa, Nobuo Kawaguchi

IEEE Transactions on Affective Computing Vol. 13 ( 4 ) page： 2229 - 2237 2022.10

Dialogue Response Generation for Text-Based Dialogue Systems with Emotion Regulation

KATAYAMA Shin, YONEZAWA Takuro, KAWAGUCHI Nobuo

Journal of Japan Society for Fuzzy Theory and Intelligent Informatics Vol. 34 ( 3 ) page： 568 - 578 2022.8

Language：English Publishing type：Research paper (scientific journal) Publisher：Japan Society for Fuzzy Theory and Intelligent Informatics

Dialogue systems that handle emotions have been shown to improve user satisfaction and increase positive interactions, and are expected to play a role as a digital partner that accompanies humans. In order for dialogue systems to recognize user emotions and express their own emotions, emotion regulation methods that select appropriate emotions from the context of the dialogue are indispensable. In this paper, we propose a text-based dialogue framework that performs emotion regulation, which estimates appropriate emotions during response. Our proposed method estimates appropriate emotions by considering the semantic and emotional context of the user’s text, and generates dialogue responses with emotional expressions using a neural network. The effectiveness of the proposed method was demonstrated through automatic evaluation using an evaluation metrics for the quality of dialogue generation and human evaluation by 100 subjects collected through a crowdsourcing.

DOI： 10.3156/jsoft.34.3_568

Time-Sensitive Cooperative Perception for Real-Time Data Sharing over Vehicular Communications: Overview, Challenges, and Future Directions Reviewed

Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi, Peter Steenkiste, Ragunathan Raj Rajkumar

IEEE Internet of Things Magazine Vol. 5 ( 2 ) page： 108 - 113 2022.6

Deep Learning for Handwriting Recognition Using IMU-Equipped Pen Reviewed Open Access

NAGATA Yoshiteru, CHOYA Tomoki, SHIMOSATO Hironori, HIGASHIURA Keisuke, YAMAGUCHI Kohei, MURAI Daichi, SAKAKURA Namiki, FUKATANI Nobuya, URANO Kenta, TOIDE Yuta, KAWAGUCHI Nobuo, YONEZAWA Takuro

JSAI Technical Report, SIG-KBS Vol. 125 ( 0 ) page： 03 2022.3

RobotNEST: Toward a Viable Testbed for IoT-Enabled Environments and Connected and Autonomous Robots Reviewed

Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi

IEEE Sensors Letters Vol. 6 ( 2 ) page： 1 - 4 2022.2

A Data-Driven Approach for Online Pre-impact Fall Detection with Wearable Devices Reviewed

Takuto Yoshida, Kazuma Kano, Keisuke Higashiura, Kohei Yamaguchi, Koki Takigami, Kenta Urano, Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi

Sensor- and Video-Based Activity and Behavior Computing Vol. 291 page： 133 - 147 2022

MetaPo: A Robotic Meta Portal for Interspace Communication. Reviewed

Takuro Yonezawa, Nozomi Hayashida, Kenta Urano, Johannes Przybilla, Yutaro Kyono, Nobuo Kawaguchi

SIGGRAPH '22: Special Interest Group on Computer Graphics and Interactive Techniques Conference page： 28 - 2 2022

XR Communication System for Remote Control Wheelchairs. Reviewed

Hironori Shimosato, Nozomi Hayashida, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 12th International Conference on the Internet of Things(IOT) page： 219 - 223 2022

Synthetic People Flow: Privacy-Preserving Mobility Modeling from Large-Scale Location Data in Urban Areas. Reviewed

Naoki Tamura, Kenta Urano, Shunsuke Aoki 0001, Takuro Yonezawa, Nobuo Kawaguchi

MobiQuitous Vol. 419 page： 553 - 567 2022

Smartphone Localization with Solar-Powered BLE Beacons in Warehouse. Reviewed

Kazuma Kano, Takuto Yoshida, Nozomi Hayashida, Yusuke Asai, Hitoshi Matsuyama, Shin Katayama, Kenta Urano, Takuro Yonezawa, Nobuo Kawaguchi

Distributed, Ambient and Pervasive Interactions. Smart Environments, Ecosystems, and Cities - 10th International Conference Vol. 13325 page： 291 - 310 2022

大規模屋外施設におけるWi-Fiパケットセンサへの影響と利活用の検証 Reviewed Open Access

米澤拓郎

情報処理学会論文誌デジタルプラクティス Vol. 3 page： 12 - 21 2022

Deep Learning for Ballroom Dance Recognition: A Temporal and Trajectory-Aware Classification Model With Three-Dimensional Pose Estimation and Wearable Sensing Reviewed

Hitoshi Matsuyama, Shunsuke Aoki, Takuro Yonezawa, Kei Hiroi, Katsuhiko Kaji, Nobuo Kawaguchi

IEEE Sensors Journal Vol. 21 ( 22 ) page： 25437 - 25448 2021.11

An End-to-End BLE Indoor Localization Method Using LSTM Open Access

Urano Kenta, Hiroi Kei, Yonezawa Takuro, Kawaguchi Nobuo

Journal of Information Processing Vol. 29 ( 0 ) page： 58 - 69 2021

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

This paper proposes an indoor localization method for Bluetooth Low Energy (BLE) devices using an end-to-end LSTM neural network. We focus on a large-scale indoor space where there is a tough environment for wireless indoor localization due to signal instability. Our proposed method adopts end-to-end localization, which means input is a time-series of signal strength and output is the estimated location at the latest time in the input. The neural network in our proposed method consists of fully-connected and LSTM layers. We use a custom-made loss function with 3 error components: MSE, the direction of travel, and the leap of the estimated location. Considering the difficulty of data collection in a short preparation term, the data generated by a simple signal simulation is used in the training phase, before training with a small amount of real data. As a result, the estimation accuracy achieves an average of 1.92m, using the data collected in GEXPO exhibition in Miraikan, Tokyo. This paper also evaluates the estimation accuracy assuming the troubles in a real operation.

DOI： 10.2197/ipsjjip.29.58

A Basic Study on Ballroom Dance Figure Classification with LSTM Using Multi-modal Sensor Reviewed

Hitoshi Matsuyama, Kei Hiroi, Katsuhiko Kaji, Takuro Yonezawa, Nobuo Kawaguchi

Smart Innovation, Systems and Technologies Vol. 204 page： 209 - 226 2021

A Gaze-Based Unobstructive Information Selection by Context-Aware Moving UI in Mixed Reality. Reviewed

Nozomi Hayashida, Hitoshi Matsuyama, Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi

Distributed, Ambient and Pervasive Interactions - 9th International Conference Vol. 12782 page： 301 - 315 2021

Attention-Guidance Method Based on Conforming Behavior of Multiple Virtual Agents for Pedestrians Reviewed

Yoshida, N; Yonezawa, T

PROCEEDINGS OF THE 21ST ACM INTERNATIONAL CONFERENCE ON INTELLIGENT VIRTUAL AGENTS (IVA) page： 209 - 215 2021

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Proceedings of the 21st ACM International Conference on Intelligent Virtual Agents Iva 2021

Humans observe the behavior of others and exhibit conforming behavior according to the situation. In this study, we propose a method to change the user's walking behavior and attention by changing the ratio of multiple virtual agents in action. We verified whether the attention to a poster on the wall and the walking behavior of a pedestrian changed according to the type and proportion of actions exhibited by multiple agents presented to a particular pedestrian. The results showed that the participant's walking speed and attention to the wall advertisement changed according to the agents' walking behavior, such as deceleration and stopping.

DOI： 10.1145/3472306.3478346

RGNet: Robust Gravity Estimation Neural Network for IMU-based Localization Using Smartphone. Reviewed

DigiMobot: Digital Twin for Human-Robot Collaboration in Indoor Environments. Reviewed

Yuto Fukushima, Yusuke Asai, Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi

IEEE Intelligent Vehicles Symposium(IV) Vol. 2021-July page： 55 - 62 2021

Takuto Yoshida, Kenta Urano, Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi

ICMU page： 1 - 8 2021

RGNet: Robust Gravity Estimation Neural Network for IMU-based Localization Using Smartphone Reviewed

Yoshida, T; Urano, K; Aoki, S; Yonezawa, T; Kawaguchi, N

13TH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK (ICMU2021) 2021

Estimating and Leveraging Latent Social Demand Based on IoT sensors: An Empirical Study in a Large Public Park. Reviewed

Yoshiteru Nagata, Daichi Murai, Shin Katayama, Kenta Urano, Shunsuke Aoki, Takuro Yonezawa, Nobuo Kawaguchi

ICMU page： 1 - 8 2021

Estimating and Leveraging Latent Social Demand Based on IoT sensors: An Empirical Study in a Large Public Park Reviewed

Nagata, Y; Murai, D; Katayama, S; Urano, K; Aoki, S; Yonezawa, T; Kawaguchi, N

13TH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK (ICMU2021) 2021

Science and Technologies for Smart Cities - 6th EAI International Conference, SmartCity360° Virtual Event, December 2-4, 2020, Proceedings Reviewed

SmartCity360° Vol. 372 2021

Time-resolved X-ray photoelectron diffraction using an angle-resolved time-of-flight electron analyzer Reviewed

Ang A.K.R., Fukatsu Y., Kimura K., Yamamoto Y., Yonezawa T., Nitta H., Fleurence A., Yamamoto S., Matsuda I., Yamada-Takamura Y., Hayashi K.

Japanese Journal of Applied Physics Vol. 59 ( 10 ) 2020.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Journal of Applied Physics

X-ray photoelectron diffraction (XPD) provides atomic resolution, element sensitive local structure information about the surfaces and interfaces of materials. In the work reported in this paper, a two-dimensional angle resolved time-of-flight (2DARTOF) system is used to perform time-resolved XPD experiments on epitaxial silicene. The two Si 2p peak components from the different atomic sites in the silicene layer allow extraction of the individual XPD patterns. Time-resolved measurements captured small angle shifts in the forward focusing peak, indicating laser-induced changes in the silicene structure. At 10 ns, the XPD patterns appear to relax back to the equilibrium state. This work demonstrates that 2DARTOF systems are well suitable for time-resolved XPD measurements.

DOI： 10.35848/1347-4065/abb57e

CityFlow: Supporting Spatial-Temporal Edge Computing for Urban Machine Learning Applications Reviewed

Makoto Kawano, Takuro Yonezawa, Tomoki Tanimura, Nam Ky Giang, Matthew Broadbent, Rodger Lea, Jin Nakazawa

EAI/Springer Innovations in Communication and Computing page： 3 - 15 2020

SelfGuard: semi-automated activity tracking for enhancing self-protection against the COVID-19 pandemic: poster abstract. Reviewed

Yuuki Nishiyama, Takuro Yonezawa, Kaoru Sezaki

SenSys '20: The 18th ACM Conference on Embedded Networked Sensor Systems(SenSys) page： 780 - 781 2020

GANonymizer: Image Anonymization Method Integrating Object Detection and Generative Adversarial Network Reviewed

Tomoki Tanimura, Makoto Kawano, Takuro Yonezawa, Jin Nakazawa

EAI/Springer Innovations in Communication and Computing page： 109 - 121 2020

Civic Crowdsensing Through Location-Aware Virtual Monsters. Reviewed

Takuro Yonezawa, Mina Sakamura, Nobuo Kawaguchi, Jin Nakazawa

Distributed, Ambient and Pervasive Interactions - 8th International Conference Vol. 12203 page： 464 - 476 2020

Person-Flow Estimation with Preserving Privacy Using Multiple 3D People Counters. Reviewed

Yoshiteru Nagata, Takuro Yonezawa, Nobuo Kawaguchi

Science and Technologies for Smart Cities - 6th EAI International Conference(SmartCity360°) Vol. 372 page： 615 - 634 2020

Nurse care activity recognition challenge: a comparative verification of multiple preprocessing approaches. Reviewed

Hitoshi Matsuyama, Takuto Yoshida, Nozomi Hayashida, Yuto Fukushima, Takuro Yonezawa, Nobuo Kawaguchi

UbiComp/ISWC '20: 2020 ACM International Joint Conference on Pervasive and Ubiquitous Computing and 2020 ACM International Symposium on Wearable Computers page： 414 - 418 2020

An End-to-End BLE Indoor Location Estimation Method Using LSTM Reviewed

Urano K., Hiroi K., Yonezawa T., Kawaguchi N.

2019 12th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2019 2019.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2019 12th International Conference on Mobile Computing and Ubiquitous Network, ICMU 2019

Indoor location estimation has long been researched to realize location-based services. In this paper, we propose an indoor location estimation method for Bluetooth Low Energy (BLE) devices using end-to-end LSTM neural network. We focus on large-scale exhibition where is a tough environment for wireless indoor location estimation due to signal strength instability. To achieve higher accuracy, deep learning based methods are proposed rather than trilateration or fingerprint. Existing deep learning based methods estimate the location from the probabilities using the difference of query signal strength and autoencoder-reconstruction of it. Proposed method adopts end-to-end location estimation, which means the neural network takes a time-series of signal strength and outputs the estimated location at the latest time in the input time-series. We also build a loss function which takes how a person walks into account. Considering the difficulty of data collection within a short preparation term of an exhibition, the data generated by a simple simulation is used in the training phase before training with a small amount of real data. As a result, the estimation accuracy is average of 1.92m, using the data collected in GEXPO exhibition in Miraikan, Tokyo. Proposed method outperforms our previous trilateration based method's 4.51m average.

DOI： 10.23919/ICMU48249.2019.9006638

Rehabilitation Support Robot for Self-Standing-Up Training of Hemiplegic Stroke Patients - Design of Counterbalance Mechanism Reviewed

Tokinaga T., Yonezawa T., Saito M., Morita Y., Tanabe H., Kiss B.

International Conference on Control Automation and Systems Vol. 2019-October page： 385 - 388 2019.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：International Conference on Control Automation and Systems

The objective of the study involved developing a rehabilitation support robot for self-standing-up training of hemiplegic stroke patients to restore normal standing-up motion. Based on our previous analysis of the therapist's guiding movements in standing-up training of patients, a passive-type robot was adopted. However, the link weight of the robot acts as a load at the patient's waist. In this work, we designed a counterbalance mechanism for the robot in order to reduce the load at the patient's waist and determined the optimal parameters for the mechanism. We confirmed by simulation that the specifications of the forces acting on the end-effectors of the robots were satisfied, and thus the proposed counterbalance mechanism was effective.

DOI： 10.23919/ICCAS47443.2019.8971502

Hybrid activity recognition for ballroom dance exercise using video and wearable sensor Reviewed

回転磁石マーカを用いたスマートフォン所持者の2次元経路推定 Reviewed Open Access

渡邊康祐, 廣井慧, 米澤拓郎, 梶克彦, 河口信夫

マルチメディア，分散，協調とモバイル(DICOMO2019)シンポジウム page： 22 - 28 2019.7

ニューラルネットワークを用いた大規模イベント向けBLE屋内位置推定の比較評価 Reviewed Open Access

浦野健太, 廣井慧, 米澤拓郎, 河口信夫

マルチメディア，分散，協調とモバイル(DICOMO2019)シンポジウム page： 29 - 35 2019.7

異なるサービス提供者間におけるトラストモデルとその実装に関する研究 Reviewed Open Access

平野流, 廣井慧, 米澤拓郎, 河口信夫

マルチメディア，分散，協調とモバイル(DICOMO2019)シンポジウム page： 284 - 290 2019.7

人の回避行動を考慮した移動ロボットの経路計画法の検討 Open Access

浅井悠佑, 廣井慧, 米澤拓郎, 河口信夫

マルチメディア，分散，協調とモバイル(DICOMO2019)シンポジウム page： 840 - 845 2019.7

Hybrid Activity Recognition for Ballroom Dance Exercise using Video and Wearable Sensor Reviewed

Hitoshi Matsuyama, Kei Hiroi, Katsuhiko Kaji, Takuro Yonezawa, Nobuo Kawaguchi

International Conference on Activity and Behavior Computing page： Paper66 2019.6

Matsuyama H., Hiroi K., Kaji K., Yonezawa T., Kawaguchi N.

2019 Joint 8th International Conference on Informatics, Electronics and Vision, ICIEV 2019 and 3rd International Conference on Imaging, Vision and Pattern Recognition, icIVPR 2019 with International Conference on Activity and Behavior Computing, ABC 2019 page： 112 - 117 2019.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2019 Joint 8th International Conference on Informatics, Electronics and Vision, ICIEV 2019 and 3rd International Conference on Imaging, Vision and Pattern Recognition, icIVPR 2019 with International Conference on Activity and Behavior Computing, ABC 2019

In this paper, we propose a hybrid activity recognition method for ballroom dance exercise using video and wearable sensor. The purpose of our research is to design a mechanism to support ballroom dance exercise, and this paper reports the first part to design a mechanism is to support ballroom dance exercise, and this paper reports the first outcome to achieve the purpose - recognizing ballroom dance exercise. There are two conceivable ways to recognize dance exercise: videos and wearable sensor. However, each of them has its disadvantages. Using video is a good way to recognize the movement of the body. However, it cannot provide us accurate timing or strength of foot actions because the number of their flames per seconds is too small to recognize the fast movements of dancers. On the other hand, while a wearable sensor is good at recognizing foot timing and strength, it is not good at recognizing the movement of the whole body. Therefore we propose a hybrid recognition method utilizing the merits of both video and wearable sensor. This paper focuses to recognize four different types of steps in Latin American, a kind of ballroom dance. For each step, we record wearable sensing data and videos. As a result, it is found that the accuracy of step recognition is improved by adding wearable sensing data to video data shot from two different angles.

DOI： 10.1109/ICIEV.2019.8858524

Cruisers: An automotive sensing platform for smart cities using door-to-door garbage collecting trucks. Reviewed

Array,Jin Nakazawa, Takuro Yonezawa, Hideyuki Tokuda

Ad Hoc Networks Vol. 85 page： 32 - 45 2019.3

Sampling rate dependency in pedestrian walking speed estimation using DualCNN-LSTM. Reviewed

Takuto Yoshida, Junto Nozaki, Kenta Urano, Kei Hiroi, Katsuhiko Kaji, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 2019 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2019 ACM International Symposium on Wearable Computers, UbiComp/ISWC 2019 Adjunct, London, UK, September 9-13, 2019. page： 862 - 868 2019

Ballroom dance step type recognition by random forest using video and wearable sensor. Reviewed

Hitoshi Matsuyama, Kei Hiroi, Katsuhiko Kaji, Takuro Yonezawa, Nobuo Kawaguchi

CityFlow: exploiting edge computing for large scale smart city applications Reviewed Open Access

Giang Nam Ky, Leung Victor C. M., Kawano Makoto, Yonezawa Takuro, Nakazawa Jin, Lea Rodger, Broadbent Matt

2019 IEEE INTERNATIONAL CONFERENCE ON BIG DATA AND SMART COMPUTING (BIGCOMP) page： 631-634 2019

Gait Dependency of Smartphone Walking Speed Estimation using Deep Learning. Reviewed

Takuto Yoshida, Junto Nozaki, Kenta Urano, Kei Hiroi, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 17th Annual International Conference on Mobile Systems, Applications, and Services, MobiSys 2019, Seoul, Republic of Korea, June 17-21, 2019. page： 641 - 642 2019

Basic Study of BLE Indoor Localization using LSTM-based Neural Network. Reviewed

Kenta Urano, Kei Hiroi, Takuro Yonezawa, Nobuo Kawaguchi

Proceedings of the 17th Annual International Conference on Mobile Systems, Applications, and Services, MobiSys 2019, Seoul, Republic of Korea, June 17-21, 2019. page： 558 - 559 2019

Capturing Subjective Time as Context and It's Applications. Reviewed

Takuro Yonezawa, Yuuki Nishiyama, Kei Hiroi, Nobuo Kawaguchi

Proceedings of the 17th Annual International Conference on Mobile Systems, Applications, and Services, MobiSys 2019, Seoul, Republic of Korea, June 17-21, 2019. page： 647 - 648 2019

An End-to-End BLE Indoor Location Estimation Method Using LSTM Reviewed

Urano Kenta, Hiroi Kei, Yonezawa Takuro, Kawaguchi Nobuo

2019 TWELFTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK (ICMU) 2019

Hybrid Activity Recognition for Ballroom Dance Exercise using Video and Wearable Sensor Reviewed

Matsuyama Hitoshi, Hiroi Kei, Kaji Katsuhiko, Yonezawa Takuro, Kawaguchi Nobuo

2019 JOINT 8TH INTERNATIONAL CONFERENCE ON INFORMATICS, ELECTRONICS & VISION (ICIEV) AND 2019 3RD INTERNATIONAL CONFERENCE ON IMAGING, VISION & PATTERN RECOGNITION (ICIVPR) WITH INTERNATIONAL CONFERENCE ON ACTIVITY AND BEHAVIOR COMPUTING (ABC) page： 112 - 117 2019

CityFlow: Exploiting Edge Computing for Large Scale Smart City Applications. Reviewed Open Access

Nam Ky Giang, Victor C. M. Leung, Makoto Kawano, Takuro Yonezawa, Jin Nakazawa, Rodger Lea, Matt Broadbent

IEEE International Conference on Big Data and Smart Computing(BigComp) page： 1 - 4 2019

Cruisers: An automotive sensing platform for smart cities using door-to-door garbage collecting trucks Reviewed

中澤仁, 米澤拓郎

International Journal of Ad Hoc Networks Vol. 85 page： 32 - 45 2019

End-to-end walking speed estimation method for smartphone PDR using DualCNN-LSTM Reviewed

Kawaguchi N., Nozaki J., Yoshida T., Hiroi K., Yonezawa T., Kaji K.

Ceur Workshop Proceedings Vol. 2498 page： 463 - 470 2019

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ceur Workshop Proceedings

Most of the current inertial positioning systems can be categorized as the strapdown algorithm and the step-and-heading approach. However, for the strapdown algorithm using smartphone as a sensor device, the accuracy of the current MEMS based accelerometer are not enough for estimating relative movement. Also, for the step-and-heading approach, robust estimation of step length is always difficult. In this paper, we propose an end-to-end walking speed estimation method using Deep Learning to overcome these problems. By using our method, we can achieve a smartphone PDR with higher accuracy and better robustness to gait type.

End-to-end walking speed estimation method for smartphone PDR using DualCNN-LSTM. Reviewed

Nobuo Kawaguchi, Junto Nozaki, Takuto Yoshida, Kei Hiroi, Takuro Yonezawa, Katsuhiko Kaji

Short Paper Proceedings of the Tenth International Conference on Indoor Positioning and Indoor Navigation - Work-in-Progress Papers (IPIN-WiP 2019) co-located with the Tenth International Conference on Indoor Positioning and Indoor Navigation (IPIN 2019) page： 463 - 470 2019

Twitterにおける虚偽情報拡散抑制に向けた情報拡散コミュニティ可視化手法の検討 Reviewed

日下部眞太郎, 米澤拓郎, 大越匡, 鈴木もとこ, 山田曉, 中澤仁

研究報告ユビキタスコンピューティングシステム（UBI） Vol. 2018-UBI-6 ( 21 ) page： 1 2018.11

みなレポ：地方自治体の日常的な行政業務における参加型センシングによる情報収集・共有システム Open Access

坂村美奈, 米澤拓郎, 伊藤友隆, 金子義之, 中澤仁

デジタルプラクティス Vol. 9 ( 2 ) page： 550 - 572 2018.4

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

地方自治体には，多種多様化する住民の要望に対して，迅速な把握・対応をする効率的なまちづくりの実現が期待される．しかし，現状の地方自治体の日常的な行政業務では，情報がデータ化・共有できておらず時間的・人的コストが高い部分が存在する．本研究では，地方自治体の日常的な行政業務において，職員の持つ携帯端末を通してリアルタイムな情報を取得可能とする参加型センシングを適用し，効率的な情報収集・共有を可能とすることを目的とする．本研究で開発した情報収集・共有システム，みなレポにより，地方自治体の日常的な行政業務の効率化だけでなく，地方自治体の職員による専門的知識に基づいた情報収集が実現される．みなレポは2016年10月から藤沢市において実運用されており，道路・ゴミの集積所の管理や，動物の死骸・落書き・不法投棄の発見に関するレポートがこれまで計1,740件以上収集された．本稿では，実運用により得られた知見および課題について報告する．

Tacvie : Implementation of Haptic Reproduction Device Amplifying Presence of Movie Sharing Experience

佐々木佳介, 野崎大幹, 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. 117 ( 451 ) page： 81 - 88 2018.2

A Platform for Mutual Watch-Over among the Elderly Using PAN and Gamification Reviewed

NAKAZAWA Jin, OBUCHI Mikio, SASAKI Wataru, OKOSHI Tadashi, EGASHIRA Kazuki, TOKUDA Hideyuki, NISHIYAMA Yuki, YONEZAWA Takuro

電子情報通信学会論文誌 Vol. J101-D ( 2 ) page： 306 - 319 2018.2

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

This paper proposes a platform, called Kugenuma Happy Board, that strengthens communication among elderly in local community for mutual watch-over among them. The platform motivates users to join the mutual watch-over leveraging health-related data acquired from a personal area network (PAN), sharing selfy pictures of smiley face among community, and gamification techniques including missions, scoring, and rankings. We have conducted an in-the-wild experiment for 10 months in Fujisawa Kanagawa, Japan. The experiment showed that the platform accelerates information sharing thus mutual watch-over among users. Particularly, we have observed that elderly users perceived other users activity from shared information, such as step counts and selfy pictures, thus strengthened human relationship in the local community.

DOI： 10.14923/transinfj.2017hap0019

Road marking blur detection with drive recorder Reviewed

Makoto Kawano, Kazuhiro Mikami, Satoshi Yokoyama, Takuro Yonezawa, Jin Nakazawa

Proceedings - 2017 IEEE International Conference on Big Data, Big Data 2017 Vol. 2018- page： 4092 - 4097 2018.1

Language：English Publishing type：Research paper (international conference proceedings) Publisher：Institute of Electrical and Electronics Engineers Inc.

Can we inspect the road condition at a low cost? City infrastructures, such as roads are very important for citizens to their city lives. Roads require constant inspection and repair due to deterioration, but it is expensive to do so with manual labor. Meanwhile, there are official city vehicles, especially garbage trucks that run through the entire area of a city every day and have cameras to record their driving. When we use these cameras, we can watch roads conditions anytime, anywhere. In our study, we focus on these cameras and attempt detecting the road damage, such as road marking blur. To achieve our goal, we explore the new system in this paper. This system adopts the object detection approach that is end-to-end learning and based on deep neural networks, which propose the blur region candidate and detect whether the road markings are blurred or not all at once. In our experiment, first, we obtain the drive recorder video from sanitation engineer and then annotate them. After annotation, we trained our models and calculate the mean average precision to evaluate our models. As a result, our model performs on our collected dataset.

DOI： 10.1109/BigData.2017.8258427

Continuous Shape Changing Locomotion of 32-legged Spherical Robot Reviewed

Nozaki Hiroki, Kujirai Yusei, Niiyama Ryuma, Kawahara Yoshihiro, Yonezawa Talcum, Nakaza Jin

2018 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS (IROS) page： 2721 - 2726 2018

Damaged Lane Markings Detection Method with Label Propagation. Reviewed

Tetsuo Nukita, Yasunari Kishimoto, Yasuhiro Iida, Makoto Kawano, Takuro Yonezawa, Jin Nakazawa

24th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2018, Hakodate, Japan, August 28-31, 2018 page： 203 - 208 2018

Character Strokes Detection and Scoring for Increasing Children's Calligraphy Training time Open Access

KAWANO Makoto, KAKINO Yui, YONEZAWA Takuro, NAKAZAWA Jin

Proceedings of the Annual Conference of JSAI Vol. JSAI2018 ( 0 ) page： 1L104 - 1L104 2018

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society for Artificial Intelligence

In order to encourage elementary school students unfamiliar with Japanese calligraphy to have an assertive attitude towards acquiring basic calligraphy skills, it is imperative to have an application that provides an environment which allows them to practice calligraphy regardless of the time and place. Due to the fact that this application requires an evaluation system that does not need a calligraphy teacher's assistance, this research proposes a method of automatically evaluating a work of calligraphy. All detected strokes within one sheet will be regarded as an object detection problem, therefore, the entire work's evaluation will depend on the detected strokes. Strokes are a fundamental technique in calligraphy, and are a vital component in creating a work of calligraphy.

DOI： 10.11517/pjsai.jsai2018.0_1l104

Counting People via High Resolution Images using Deep Learning Open Access

KAWANO Makoto, YAMADA Yusuke, YONEZAWA Takuro, NAKAZAWA Jin

Proceedings of the Annual Conference of JSAI Vol. JSAI2018 ( 0 ) page： 4Pin105 - 4Pin105 2018

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society for Artificial Intelligence

観光地でのIT導入があまり進んでおらず、ITを導入することで改善される問題は多く存在する。例えば、観光地などで人物カウントを自動で行うシステムを導入することによって、観光地の集客力を定量的に分析することが可能となる。本研究では、広域の観光地を捉えた高解像度の画像から人物をカウントする手法を提案する。人物カウントのシステムの先行研究は複数存在するが、いずれも狭域を捉えた画像を扱っている。広域を捉えた画像は、人がいないエリアが、人がいるエリアよりも大きく、不均衡なデータである。我々の提案手法では、CNNを用いた密度推定に、サンプリングアルゴリズムを導入することによってデータの不均衡性に対処した。この手法の有効性を示すために、江ノ島の海岸を捉えた画像をデータセットとして用いて実験を行ったところ、既存手法を上回る精度を出すことができた。

DOI： 10.11517/pjsai.jsai2018.0_4pin105

Meal Photo SNS with Mutual Healthiness Evaluation for Improving Users' Eating Habits. Reviewed

Yusaku Eigen, Yuuki Nishiyama, Takuro Yonezawa, Tadashi Okoshi, Jin Nakazawa

Proceedings of the 2018 ACM International Joint Conference and 2018 International Symposium on Pervasive and Ubiquitous Computing and Wearable Computers, UbiComp/ISWC 2018 Adjunct, Singapore, October 08-12, 2018 Vol. 60 ( 10 ) page： 339 - 342 2018

OmimamoriNet: An Outdoor Positioning System Based on Wi-SUN FAN Network Reviewed

Chen Yin, Sakamura Mina, Nakazawa Jin, Yonezawa Takuro, Tsuge Akira, Hamada Yuichi

2018 ELEVENTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK (ICMU 2018) page： . 2018

Accelerating Urban Science by Crowdsensing with Civil Officers. Reviewed

Takuro Yonezawa, Koh Takeuchi, Tomotaka Ito, Mina Sakamura, Yasue Kishino, Futoshi Naya, Naonori Ueda, Jin Nakazawa

Continuous Shape Changing Locomotion of 32-legged Spherical Robot. Reviewed

Hiroki Nozaki, Yusei Kujirai, Ryuma Niiyama, Yoshihiro Kawahara, Takuro Yonezawa, Jin Nakazawa

2018 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2018, Madrid, Spain, October 1-5, 2018 page： 2721 - 2726 2018

OmimamoriNet: An Outdoor Positioning System Based on Wi-SUN FAN Network. Reviewed

Yin Chen,Mina Sakamura, Jin Nakazawa, Takuro Yonezawa, Akira Tsuge, Yuichi Hamada

Eleventh International Conference on Mobile Computing and Ubiquitous Network, ICMU 2018, Auckland, New Zealand, October 5-8, 2018 page： 1 - 6 2018

Senbay: a platform for instantly capturing, integrating, and restreaming of synchronized multiple sensor-data stream. Reviewed

Yuuki Nishiyama,Ani, K. Dey, Denzil Ferreira, Takuro Yonezawa, Jin Nakazawa

Proceedings of the 20th International Conference on Human-Computer Interaction with Mobile Devices and Services Adjunct, MobileHCI 2018, Barcelona, Spain, September 03-06, 2018 page： 291 - 291 2018

Overview of IUI2018 workshop: User interfaces for spatial and temporal data analysis (UISTDA2018) Reviewed

Wakamiya S., Jatowt A., Kawai Y., Akiyama T., Campos R., Yonezawa T.

Ceur Workshop Proceedings Vol. 2068 2018

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ceur Workshop Proceedings

Nowadays, humanity generates and contributes to form large and complex datasets, going from documents published on media outlets, posts on social media or location-based information. The generated information tends to be complex, heterogeneous (texts, images, videos, etc.) and is growing at an incredible pace, with much of this data having a strong spatial and temporal focus. This steady increase in the availability of such a volume of information, forces the development of more effective user interfaces that would assist users in efficient visualization, analysis and exploration of the data. This half-day workshop on User Interfaces for Spatial and Temporal Data Analysis (UISTDA) held in conjunction with the IUI2018 conference on March 11th, aimed at sharing the latest progress and developments, current challenges and potential applications for exploiting large amounts of spatial and temporal data. In this paper we provide an overview of the workshop goals together with its main contributions.

MyFactor: Individual Characteristic Adaptive Estimation of Factor Information Contributing to Human Internal State Open Access

小渕幹夫, 西山勇毅, 大越匡, 米澤拓郎, 中澤仁

情報処理学会論文誌 Vol. 58 ( 10 ) page： 1674 - 1687 2017.10

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

近年，様々なセンサを搭載したスマートフォンの発達と普及により，第三者による客観視が困難である「忙しい」や「疲れている」といった人間の内面状態の推定を行う研究が行われている．人間の内面状態を機械に認識させ，内面状態に寄与している因子に関する情報を人々に還元できれば，人間が自身の感情や気分を制御したり，特定の内面状態の獲得や回避といった行動変容へと応用可能である．しかし，人間の内面状態の認識・分析・還元においては，各個人の多様性に適応した動作の実現が課題である．本研究ではスマートフォンのセンサデータを蓄積し，正解データとなる内面状態の注釈をユーザが記録することで，個人の内面状態に寄与している因子を還元するために，因子情報を解析するシステム「MyFactor」を構築した．大学生13名による111日にわたる評価実験を行った結果，被験者全員のデータを用いて学習を行う「統合モデル」と比較して，各ユーザのデータのみを用いて個別に学習した「個人モデル」においては内面状態の推定精度が21%上昇した．また，利用可能なすべてのセンサからのデータを用いて学習した場合よりも，単一センサからのデータのみを用いて学習を行い，最も高精度で分類を行ったモデルを選択した方が高い推定精度を記録し，ユーザに自身の内面状態に関して深い理解を与える可能性を示した．Recently, due to the advance and spread of smartphones equipped with various sensors, human beings' inner states such as "busyness" or "tiredness" can be detected more accurately. If people can recognize the factors contributing to their inner states, they will be able to regulate their own emotions and moods by paying attention to those factors. However, the adaptive system for each individual's diversity that recognize, analyze, and provide the factors contributing to our inner state is not realized. In this research, we propose a system, MyFactor, that accumulates smartphone sensor data and user annotations about inner states to extract and provide information about the important factors contributing to a user's inner states. In a 111-day experiment with 13 university students, researchers estimated that an "individual model" developed only with the data of each user had a higher predictive accuracy for human inner states than the generic model developed using data from all subjects. In addition, the model with the highest predictive accuracy, trained by a single sensor, performed better and showed the possibility of giving a deeper understanding of human inner states than the model trained using data from all available sensors.

Proposal of a method to detect damaged lane markings based on label propagation

岸本康成, 飯田恭弘, 岩村相哲, 河野慎, 米澤拓郎, 中澤仁, 徳田英幸

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 117 ( 210 ) page： 97 - 102 2017.9

Proposal of a method to detect damaged lane markings based on label propagation

岸本康成, 飯田恭弘, 岩村相哲, 河野慎, 米澤拓郎, 中澤仁, 徳田英幸

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 117 ( 211 ) page： 97 - 102 2017.9

ユニバーサルセンサネットワークと清掃車を活用した藤沢市のスマート化 Open Access

中澤仁, 陳寅, 米澤拓郎, 大越匡, 徳田英幸

デジタルプラクティス Vol. 8 ( 3 ) page： 244 - 252 2017.7

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

さまざまなセンシングデータを実空間から収集し，住民や自治体，大学，民間企業をはじめとするステークホルダ間で共有し，情報の利活用を進めていくことで地域課題の解決に繋げることを目的として，まずセンシングデータの流通プラットフォームとしてユニバーサルセンサネットワーク技術(USN)を提案する．同技術では，物理センサや参加型センサをはじめとする多様なセンサで生成されたデータを，統一的なメタデータを伴って柔軟に流通させられ，通信プロトコルXMPP上のpublish/subscribe機能を用いて，センシングデータの生成側と消費側の相互依存性を解消しながら，スケーラブルなデータ流通を実現している．また，USNを用いた神奈川県藤沢市における実空間センシング事例として，清掃車にピギーバックした環境情報センシングと，行政職員による落書きや不法投棄物といった実空間不具合事象に関する参加型センシングを示す．これらのシステムの開発・運用を通じて，USNにおける仮想デバイスの抽象化を用いた多様なセンサの表現や機能の有効性を示すとともに，応用可能性やスケーラビリティを示す．

DOI： 10.20729/00182453

Likeyboard : Instant Lifelog Data Sharing Using Smartphone Keyboard Interface

石川伶, 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

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 116 ( 508 ) page： 69 - 74 2017.3

SpoTrip : 観光客リピータ化促進のための隠れスポット情報提供システムの評価 (モバイルネットワークとアプリケーション)

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

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 116 ( 508 ) page： 157 - 164 2017.3

Likeyboard : Instant Lifelog Data Sharing Using Smartphone Keyboard Interface

石川伶, 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

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 116 ( 509 ) page： 79 - 84 2017.3

SpoTrip : 観光客リピータ化促進のための隠れスポット情報提供システムの評価 (知的環境とセンサネットワーク)

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

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 116 ( 509 ) page： 185 - 192 2017.3

C's: Sensing the Quality of Traffic Markings Using Camera-Attached Cars Reviewed Open Access

KAWASAKI Takafumi, KAWANO Makoto, IWAMOTO Takeshi, MATSUMOTO Michito, YONEZAWA Takuro, NAKAZAWA Jin, TOKUDA Hideyuki

SICE Journal of Control, Measurement, and System Integration Vol. 10 ( 5 ) page： 393 - 401 2017

Language：English Publishing type：Research paper (scientific journal) Publisher：The Society of Instrument and Control Engineers

Road maintenance requires local city governments to dedicate a substantial amount of funds in finding and repairing damaged traffic marks and pavements. In developed cities, the total road length is so large that the cost becomes unreasonably high. In this paper, we propose a method of sensing damaged traffic marks from images captured by a camera mounted to a car, for the purpose of reducing road maintenance cost. In particular, we utilized convolutional neural networks (CNN), as well as linear support vector machines (SVM) and Random Forest, in developing a system of damage detection. The experiments used thousands of images captured in the wild and showed that the method can detect damages using CNN with 93% accuracy, at maximum, and at reasonable speed (55 images per second).

DOI： 10.9746/jcmsi.10.393

Interruptibility Map: Geographical Analysis of Users' Interruptibility in Smart Cities Reviewed

Road Marking Blur Detection with Drive Recorder Reviewed

Kawano Makoto, Mikami Kazuhiro, Yokoyama Satoshi, Yonezawa Takuro, Nakazawa Jin

2017 IEEE INTERNATIONAL CONFERENCE ON BIG DATA (BIG DATA) page： 4092 - 4097 2017

Mikio Obuchi, Tadashi Okoshi, Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

2017 IEEE INTERNATIONAL CONFERENCE ON PERVASIVE COMPUTING AND COMMUNICATIONS WORKSHOPS (PERCOM WORKSHOPS) page： 357 - 362 2017

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

Investigating users' interruptibility as an indicator of his/her attention status has been essential in recent pervasive computing where the users' attention resources get scarce against ever increasing amounts of information. In this paper, we address research problems related to the users' available interruptibility, their physical activities, and their current locations and situations. We propose the "Interruptibility Map", a geographical tool for analyzing and visualizing the user's local interruptibility status in the context of smart city research. Our map describes where citizens are expected to feel more or less interruptive against notifications produced by computing devices, which are known to have negative effects on work productivity, emotion, and psychological state. We conducted a continuous analysis from our previous research and a new additional in-the-wild user study for 2 weeks with 29 participants to investigate the relationship between one's interruptibility and their locations and situations. As a highlight of our findings, we found certain pairs of user activity change and a location that showed better interruptibility to users, such as an activity change of "when user's riding car(bus) stops" in the bus commute situation.

DOI： 10.1109/PERCOMW.2017.7917588

Evaluating the spatio-temporal coverage of automotive sensing for smart cities. Reviewed

Yin Chen, Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

Tenth International Conference on Mobile Computing and Ubiquitous Network, ICMU 2017, Toyama, Japan, October 3-5, 2017 Vol. 2018-January page： 1 - 5 2017

Shape changing locomotion by spiny multipedal robot. Reviewed

Hiroki Nozaki, Ryuma Niiyama, Takuro Yonezawa, Jin Nakazawa

2017 IEEE International Conference on Robotics and Biomimetics, ROBIO 2017, Macau, Macao, December 5-8, 2017 Vol. 2018-January page： 2162 - 2166 2017

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

© 2017 IEEE. The use of geometric is an alternative framework for robotic locomotion instead of animal-inspired structures. We propose a spiny, multi-pedal robot that uses radial linear actuators as the legs. We developed a unique telescopic slide actuator that has a stroke up to 250% of its minimum length. The default form of the robot is a sphere with variable diameters. The radial arrangement of the telescopic slide actuators allows a large range of shape transformation and processes for rolling. We first show the basic properties of the actuator to verify the ability to elevate and propel the body. The single module of the actuator has a weight of 0.4 kg and can output a force of 25 N maximum. We demonstrate that the robot with twelve spines can change its shape to adapt to a level ground, wall, and rocky surfaces. We also show that the robot can roll on level ground with triangle-based strides. We expect further applications in surveillance and unmanned exploration.

DOI： 10.1109/ROBIO.2017.8324739

Lokemon:その場に潜むモンスターを介した参加型センシング手法 Reviewed

坂村美奈, 米澤拓郎, 大越匡, 中澤仁, 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. 2017-UBI54 ( 12 ) page： 1 2017

HealthFight: 多数決を用いた食習慣改善ソーシャルメディア Reviewed

栄元優作, 江頭和輝, 河野慎, 西山勇毅, 大越匡, 米澤拓郎, 高汐一紀, 中澤仁

研究報告ユビキタスコンピューティングシステム（UBI） Vol. 2017-UBI55 ( 16 ) page： 1 2017

Evaluating the Spatio-temporal Coverage of Automotive Sensing for Smart Cities Reviewed

Chen, Y; Yonezawa, T; Nakazawa, J; Tokuda, H

2017 TENTH INTERNATIONAL CONFERENCE ON MOBILE COMPUTING AND UBIQUITOUS NETWORK (ICMU) page： 13 - 17 2017

SpoTrip: 観光客リピータ化促進のための隠れスポット情報提供システムの評価 Reviewed

片山晋, 礒川直大, 小渕幹夫, 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. 2017-UBI53 ( 12 ) page： 1 2017

Shape Changing Locomotion by Spiny Multipedal Robot Reviewed

Nozaki, H; Niiyama, R; Yonezawa, T; Nakazawa, J

2017 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND BIOMIMETICS (IEEE ROBIO 2017) page： 2162 - 2166 2017

Likeyboard: ライフログデータ共有簡易化のためのスマートフォンキーボードインタフェース Reviewed

石川伶, 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

研究報告ユビキタスコンピューティングシステム（UBI） Vol. 2017-UBI53 ( 12 ) page： 1 2017

実況lizer: スポーツ実況のメタファに基づいたライブ都市センサデータの可聴化手法の提案 Reviewed

井上義之, 米澤拓郎, 大越匡, 中澤仁

研究報告ユビキタスコンピューティングシステム（UBI） Vol. 2017-UBI56 ( 6 ) page： 1 2017

An Empirical Study on Coverage-Ensured Automotive Sensing using Door-to-door Garbage Collecting Trucks Reviewed

Yin Chen, Jin Nakazawa, Takuro Yonezawa, Takafumi Kawasaki, Hideyuki Tokuda

Proceedings of the 2nd International Workshop on Smart, SmartCities 2016 page： 6:1-6:6 - 6 2016.12

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

Due to the advance in information and communication technologies, smart cities have become an increasingly appealing vision. One indispensable basis in the research, development and implementation of smart cities is urban sensing technologies, which collect various citywide data that will be processed to generate information for understanding the status of cities. Automotive sensing is a novel urban sensing technology that utilizes the mobility of automobiles to conduct sensing tasks. In a collaborative smart-city project with the city office of Fujisawa City, Japan, we designed and implemented an automotive sensing platform called Cruisers, and have deployed it into the garbage collecting trucks of the city to evaluate the applicability of automotive sensing in realistic urban settings. In this paper, we first detail the system design, implementation and deployment of Cruisers and then evaluate its performance in realistic setting.

DOI： 10.1145/3009912.3009921

SOXFire: A Universal Sensor Network System for Sharing Social Big Sensor Data in Smart Cities Reviewed

Takuro Yonezawa, Tomotaka Ito, Jin Nakazawa, Hideyuki Tokuda

Proceedings of the 2nd International Workshop on Smart, SmartCities 2016 page： 2:1-2:6 - 6 2016.12

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

We introduce SOXFire, a multi-community city-wide sensor network for sharing social big sensor data in smart cities. The goal of SOXFire is to provide practical distributed and federated infrastructure for IoT sensor data sharing among various users/organizations in a way that is scalable, exten- sible, easy to use and secure with preserving privacy. SOX- Fire supports not only access to physical IoT sensors but also crowd sensing and SNS/Web sensing where city employees, citizen and WEB developers contributed in a different ways but unified APIs. In this paper, we outline the concept of SOXFire and present it's design and implementation with tangible libraries and tools. In addition, we discuss capability and usability of SOXFire based on our experiments in smart city project in Japan.

DOI： 10.1145/3009912.3009922

EverCuate: Asynchronously-participatable Tsunami Evacuation Training System Open Access

大越匡, 米澤拓郎, 山本慎一郎, 中島円, 神武直彦, 栗田治, 中澤仁, 徳田英幸

情報処理学会論文誌 Vol. 57 ( 10 ) page： 2143 - 2161 2016.10

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

大地震発生時の津波から身を守るためには平常時の津波避難訓練が重要とされる．本研究は，従来行われてきたイベント型の津波避難訓練における，災害シナリオ，訓練日時，訓練場所，参加可能な人の面での柔軟性欠如の課題に取り組み，ユビキタス・コンピューティング技術を利用してそれらを解決する「ユーザ非同期参加型津波避難訓練モデル」を提案する．同モデルにおいては，各ユーザが個別に，任意のタイミング・災害シナリオ・地点で避難訓練を実施でき，また避難行動記録や避難中の気づきを集約して可視化分析することで，防災計画の更新に活用できることを特長とする．本研究では同モデルに基づきプロトタイプシステム「EverCuate」を構築した．神奈川県藤沢市において40人の被験者による229回にわたる広範なユーザ評価実証実験，およびアンケート評価を行い，訓練への参加のしやすさへの寄与，防災意識向上への貢献，収集した避難行動やユーザフィードバック情報の可視化による防災計画への活用，既存方式と比較しての施策としての有効性の面で効果が明らかになった．Evacuation trainings have been conducted as an effective action to protect people from incoming tsunamis in case of a big earthquake. This research addresses limitations of existing conventional "event-style" tsunami evacuation trainings, that are inflexible in disaster scenarios, training timings, training locations, and participatable trainees. We propose a new ubiquitous computing technology-supported training model named "Asynchronously-Participatable Tsunami Evacuation Training Model" and a prototype system "EverCuate" based on this model. We evaluated the EverCuate system by conducting an extensive user study in Fujisawa city, Kanagawa, with 40 participants and the total number of 229 trainings. The evaluation results validated the effectiveness of EverCuate in terms of easiness in participation to a training, promotion of understanding necessity of different evacuation behaviour for different disaster scenarios, and easiness of analysing people's real evacuation behaviour from the view point of local authorities.

MinaQn: Web-based Participatory Sensing Platform for Citizen-centric Urban Development Open Access

坂村美奈, 米澤拓郎, 伊藤友隆, 中澤仁, 徳田英幸

情報処理学会論文誌 Vol. 57 ( 10 ) page： 2162 - 2174 2016.10

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

市民参加型まちづくり（Participatory planning）とは，まちづくりの過程に市民を巻き込むことであり，実際の都市の中で起こっている問題を素早く発見，解決できる可能性が高い．市民参加型まちづくりを促進するためには市の職員と市民の間での日常的なコミュニケーションを活性化することが重要である．本研究の目的は，人々が日常的に持つモバイル端末やPC端末を通して情報をやりとりする参加型センシングを市民参加型まちづくりにも適用することである．既存の参加型センシングの例では，質問の内容カテゴリが限定的なものや，市民の意見収集，意見交換を行うための特定のアプリケーションのインストールが必要であるものが存在する．また，市民から提供された情報はプライバシ情報を除いたオープンな情報であることやシステムの操作が容易であることが望ましい．本研究ではこれらの課題を解決し，市民参加型まちづくりのための参加型センシングシステム，MinaQnを提案する．本研究ではMinaQnを2週間にわたって3都市（藤沢市・茅ヶ崎市・寒川町）の公式ホームページに組み込み，市の職員および市民に利用してもらう実証実験を行った．全体として1,000個以上の回答データと市の職員および市民からのフィードバックを得ることで，定性的および定量的な評価を行い，将来異なる地域や多くの市民に持続的に参加してもらうためにはどうすればよいか，これからの参加型センシングシステムのデザイン指針を示した．特に災害時において今後より多くの市民に位置情報を提供してもらうためには，質問の意図説明やプッシュ通知など市からの積極性が必要なことや，市の職員が実際に自由な質問設定をするために自治体の中あるいは市全体で議論し質問内容の枠組みを増やしていけるような取り組みや制度の策定が必要なことが分かった．Participatory planning is to involve citizens in a process of urban development, which is likely to find out and solve a problem happening in an actual city. To promote participatory planning, it is important to activate everyday communication between city officials and citizens. The purpose of this research is to apply the participatory sensing technology to participatory planning which people exchange information through their mobile devices or computers. In the existing examples of participatory sensing, the categories of questions are limited or it is necessary to install a specific application for collecting and reflecting citizens' demands. Besides, it is required that data from citizens should be open without privacy information and also operation of a system should be easy. To solve these problems, we propose MinaQn (Mina means everybody in Japanese), a participatory sensing system for citizen-centric urban development. We carried out a two weeks experiment in corporation with 3 cities in Japan. Overall, more than 1,000 answer data and feedback were gathered and we measured the effectiveness of MinaQn with qualitative and quantitative data. Also we direct the design policies of future participatory sensing systems. In particular, to get more people involved in providing their location information in the event of a natural disaster, we found that an active agent of city officials and support for the establishment of standards and systems for setting free questions are needed.

Message from the general and program chairs Reviewed

Takuro Yonezawa, Till Riedel, Kota Tsubouchi

ACM International Conference Proceeding Series Vol. 24-25- 2016.5

ReFabricator: Integrating everyday objects for digital fabrication Reviewed

Suguru Yamada, Masaki Ogawa, Hironao Morishige, Takuro Yonezawa, Hiroki Nozaki, Hideyuki Tokuda

Conference on Human Factors in Computing Systems - Proceedings Vol. 07-12- page： 3804 - 3807 2016.5

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

Since current digital fabrication relies on 3D printer very much, there are several concerns such as printing cost (i.e., both financial and temporal cost) and sometimes too homogeneous impression with plastic filament. To address and solve the problem, we propose ReFabricator, a computational fabrication tool integrating everyday objects into digital fabrication. ReFabrication is a concept of fabrication, mixing the idea of Reuse and Digital Fabrication, which aims to fabricate new functional shape with ready made products, effectively utilizing its behavior. As a system prototype, we have implemented a design tool which enables users to gather up every day objects and reassemble them to another functional shape with taking advantages of both analog and digital fabrication. In particular, the system calculates the optimized positional relationship among objects, and generates joint objects to bond the objects together in order to achieve a certain shape.

DOI： 10.1145/2851581.2890237

Appearance-based person identification algorithm to search for persons using a flying robot Reviewed

Toward Health Exercise Behavior Change for Teams Using Lifelog Sharing Models Reviewed Open Access

Yuuki Nishiyama, Tadashi Okoshi, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS Vol. 20 ( 3 ) page： 775 - 786 2016.5

Language：English Publishing type：Research paper (scientific journal) Publisher：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

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

DOI： 10.1109/JBHI.2015.2478903

Yonezawa T., Takeuchi E., Ohno K., Tadokoro S.

Ssrr 2015 2015 IEEE International Symposium on Safety Security and Rescue Robotics 2016.3

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ssrr 2015 2015 IEEE International Symposium on Safety Security and Rescue Robotics

This paper proposes a person identification algorithm that can be used when searching for persons from multiple images captured by flying robots. The images taken by such robots have low resolution and contain various viewing angles of people because they fly at a safe distance from and often move around people. The proposed person identification algorithm is based on appearance and can identify a person from low-resolution images of the upper body. In appearance-based person identification, the accuracy is low when a single image is used. Therefore, the accuracy is improved by accumulating the score. Experimental results obtained using 40 subjects show that the identification accuracy based on images having different view angles is better than that based on images having similar view angles. Further, the identification accuracy increase even when rear images of the person that are barely distinguishable from those of another person are added to the input images. In addition, it can identify persons even when the size of the upper body image is as small as 15 pixels. We performed the identification experiment using images taken by an aerial-robot while it was actually flying and proved the effectiveness of the algorithm.

DOI： 10.1109/SSRR.2015.7442995

MyFactor: ライフログを用いたユーザの内面状態に関する因子分析 Reviewed

小渕幹夫, 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-4 ( 10 ) page： 1 2016.2

MyTime: タイムマネジメントの促進を目的としたアプリケーション使用時間自動記録システムの提案 Reviewed

小出粋玄, 小渕幹夫, 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-4 ( 36 ) page： 1 2016.2

City Happenings into Wikipedia Category: Classifying Urban Events by Combining Analyses of Location-based Social Networks and Wikipedia Reviewed

Shoya Sato, Takuro Yonezawa, Jin Nakazawa, Satoshi Kawasaki, Ken Ohta, Hiroshi Inamura, Hideyuki Tokuda

SECOND INTERNATIONAL CONFERENCE ON IOT IN URBAN SPACE (URB-IOT 2016) Vol. 24-25-May-2016 page： 47 - 52 2016

Language：English Publishing type：Research paper (international conference proceedings) Publisher：ASSOC COMPUTING MACHINERY

Recently, many researchers have been focusing on the detection and classification of urban events by information analysis on social networks. Previous works mainly use text analysis of users' posts on social networks for detecting urban events. However, this approach has a limitation that the users' posts must mention the event for the analysis to be conducted. We propose a new method for classifying urban events by extracting user interest from the location-based social network information without text analysis. The proposed method includes analyzing common friends of users in the vicinity of the event venue and extracting common the friends' attributes by referring to related Wikipedia information. We designed and implemented the proposed method, and conducted an experiment for evaluating our method. Our experimental result shows that our method can classify events well in cases where participants have similar interests.

DOI： 10.1145/2962735.2962740

Damage Detector: The Damage Automatic Detection of Compartment Lines Using A Public Vehicle and A Camera Reviewed

Forward-genetics analysis of sleep in randomly mutagenized mice Reviewed Open Access

Funato H.

Nature Vol. 539 ( 7629 ) page： 378 - 383 2016

European IoT International Cooperation in Research and Innovation Reviewed

Cousin Philippe, Malo Pedro, Congduc Pham, Yu Xiaohui, Li Jun, Song JaeSeung, Thiare Ousmane, Daffe Amadou, Kofuji Sergio, Marao Gabriel, Amazonas Jose, Gurgen Levent, Yonezawa Takuro, Akiyama Toyokazu, Maggio Martino, Moessner Klaus, Miyake Yutaka, Vermesan Ovidiu, Le Gall Franck, Almeida Bruno

Digitising the Industry Internet of Things Connecting the Physical, Digital and Virtual Worlds Vol. 49 page： 293 - 333 2016

Takafumi Kawasaki, Makoto Kawano, Takeshi Iwamoto, Michito Matsumoto, Takuro Yonezawa, Jin Nakazawa, Hideyuki Tokuda

ADJUNCT PROCEEDINGS OF THE 13TH INTERNATIONAL CONFERENCE ON MOBILE AND UBIQUITOUS SYSTEMS: COMPUTING NETWORKING AND SERVICES (MOBIQUITOUS 2016) Vol. 28-November-2016 page： 53 - 58 2016

Language：English Publishing type：Research paper (international conference proceedings) Publisher：ASSOC COMPUTING MACHINERY

In Japan, there are 1.2milion kilometers or more of the road, of which 900,000 km of road has been paved. Paved road has been painted compartment line to separate many vehicles and driver-pedestrian. Compartment line is important for drivers and pedestrians because they can recognize for they are aware of the width of the roadway and the sidewalk by the compartment line. Therefore, municipality should inspect the ongoing compartment line but they are inspected by people so the burden for road management is big. The purpose of this research would be to automatically detect the damage of the compartment line. The image obtained from cameras, applying random forest. In this experiment, we used more than about 50,000 of images by capturing a Walking camera and a vehicle-mounted camera. Baseline and precision comparison result, the detection of damage to compartment line, it was confirmed that the proposed method is effective.

DOI： 10.1145/3004010.3004017

Cruisers: A Public Automotive Sensing Platform for Smart Cities Reviewed

Yin Chen, Jin Nakazawa, Takuro Yonezawa, Takafumi Kawsaki, Hideyuki Tokuda

PROCEEDINGS 2016 IEEE 36TH INTERNATIONAL CONFERENCE ON DISTRIBUTED COMPUTING SYSTEMS ICDCS 2016 Vol. 2016-August page： 767 - 768 2016

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

Collecting urban data in a citywide scale plays a fundamental role in the research, development and implementation of smart cities. This demo introduces Cruisers, an automotive sensing platform for smart cities, which is developed based on the following ideas. a) Garbage collecting trucks are used as host automobiles to accommodate sensors, b) 3G cellular communication network is used to wirelessly deliver sensed data directly to servers, and c) Proxy server( s) are adopted to convert the format of sensed data to required ones. This platform has been deployed to 24 garbage collecting trucks at Fujisawa city, i.e., nearly 1/4 of the total number of such trucks in the city. An iOS application is also developed to demonstrate the sensing process and the covered area.

DOI： 10.1109/ICDCS.2016.53

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

Interiorizor: Reassembling Everyday Objects into an Interior Reviewed

Morishige Hironao, Yamada Suguru, Nozaki Hiroki, Ogawa Masaki, Okoshi Tadashi, Yonezawa Takuro, Tokuda Hideyuki

CHI 2016 Symposium on Emerging Japanese HCI Research Collection Program 2016

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

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

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

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

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

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

Aqua Mapping : Interaction system with ornamental fish through the aquarium

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

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

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

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

DOI： 10.1145/2637064.2637101

A method for detecting damage of traffic marks by half celestial camera attached to cars Reviewed

Takafumi Kawasaki, Takeshi Iwamoto, Michito Matsumoto, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

Proceedings of the 12th International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services, MOBIQUITOUS 2015 Vol. 1 ( 5 ) page： 226 - 233 2015

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

Roads are becoming deterioration in everywhere. In some places, traffic marks painted on roads are damaged thus needed to be updated. Municipalities must manage road condition and traffic marks (road painting). It is the municipalities task to manage those roads using, for example, special inspection cars and human eyes. However, the management cost is high if a city contains many roads. This paper proposes a mechanism that automates this management. Our idea is to leverage cameras attached to garbage trucks, which run through the entire city almost everyday. The mechanism collects road images and detects damaged traffic marks using an image recognition algorithm. This paper shows the algorithm and reports the benchmark results. The benchmark showed that the mechanism can detect the damaged traffic marks with 76.6% precision.

DOI： 10.4108/icst.mobiquitous.2015.260306

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

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

2015 INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN INTERNET OF THINGS (RIOT) page： 1 - 6 2015

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

In order to help smart cities to provide responsive services to improve the quality of life of their citizens, a global-scale platform relying on Cloud computing as an enabler to bridge the Internet of Things with Internet of People via Internet of Services, is presented in this paper. This platform will focus on a citizen-centric approach, offering to end-users the possibility of creating their own Cloud services and share them with other citizens, as well as involving other city stakeholders ranging from municipalities to service developers and application integrators. The definition, design and development of the aforementioned platform has been carried out within ClouT project (still ongoing), framed into a joint European-Japanese initiative, where different field trials developed on top of the developed platform, have been deployed in the four cities that take part of the project: Mitaka and Fujisawa in Japan, and Santander and Genova in Europe.

DOI： 10.1109/RIOT.2015.7104913

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

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

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

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

We propose a novel robot control system by transmitting robot control information on existing video streaming services as dynamic encoded two-dimentional visual code. We implemented sensor data transmitting system by using dynamic encoded two-dimentional visual code which called SENSe-TREAM [1] and we built the robot controlling system by using SENSeTREAM architecture. This paper shows the architecture of robot controlling system and future vision of telepresence and human-robot interaction.

DOI： 10.1109/ICMU.2015.7061042

BI-5-4 ClouT : Clout of Things for Empowering the Citizen Clout in Smart Cities

会議参加報告 Reviewed

小林保正, 磯山直也, 五十川麻理子, 石田智行, 丸谷宜史, 米澤拓郎, 山本景子, 門内靖明, 笛木康人

日本バーチャルリアリティ学会誌 Vol. 19 ( 4 ) page： 60 - 65 2014.12

車両に取り付けたカメラによる路面標示の擦り切れ検出手法の提案 Open Access

河崎隆文, 打越大成, 岩本健嗣, 米澤拓郎, 中澤仁, 徳田英幸

マルチメディア通信と分散処理ワークショップ論文集 Vol. 2014 ( 5 ) page： 101 - 108 2014.12

Nakazawa Jin, Yonezawa Takuro, Tokuda Hideyuki

Proceedings of the Society Conference of IEICE Vol. 2014 ( 2 ) page： "SS - 80"-"SS-81" 2014.9

Evidence-based real space assurance and sensing technologies Reviewed

Nakazawa J.

Journal of the Institute of Electronics, Information and Communication Engineers Vol. 97 ( 8 ) page： 670 - 674 2014.8

Evidence-based Real Space Assurance and Sensing Technologies

NAKAZAWA Jin, YONEZAWA Takuro

The Journal of the Institute of Electronics, Information, and Communication Engineers Vol. 97 ( 8 ) page： 670 - 674 2014.8

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

建築物の老朽化監視や,農業・漁業等の一次産業への応用,人間の健康状態把握など,センシング技術が多様な目的で応用されつつある.それらにおいてセンシングは,目的を達成するために必要となるエビデンスを実空間から収集する技術と位置付けられる.本稿では,まず様々なセンシング技術を紹介し,データを空間横断的に利活用するためのシステムや,実空間の課題を解決するための応用技術としてエビデンス指向システム等について解説する.

スマートシティ実現に向けた車載型大気情報センシングシステム Open Access

岸野泰恵, 須山敬之, 納谷太, 米澤拓郎, 中澤仁, 徳田英幸

マルチメディア、分散協調とモバイルシンポジウム2014論文集 Vol. 2014 page： 952 - 958 2014.7

Cloud of Things for Empowering the Citizen Clout in Smart Cities Reviewed

YONEZAWA Takuro

IEICE technical report. ASN, Ambient intelligence and sensor networks Vol. 114 ( 65 ) page： 139 - 140 2014.5

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

Cities have been experiencing emerging challenges such as efficient energy management, economic growth and development, security and quality of life of its habitants. To tackle these issues, two recently emerged set of technologies from ICT have great potential to provide the necessary enablers: Internet of Things and Cloud Computing. ClouT's overall concept is leveraging the Cloud Computing as an enabler to bridge the Internet of Things with Internet of People via Internet of Services, to establish an efficient communication and collaboration platform exploiting all possible information sources to make the cities smarter.

EverCopter : 着脱可能な有線給電式空中センシングプラットフォーム (モバイルネットワークとアプリケーション)

興野悠太郎, 米澤拓郎, 野崎大幹, 小川正幹, 伊藤友隆, 中澤仁, 高汐一紀, 徳田英幸

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 113 ( 495 ) page： 205 - 211 2014.3

Help Me! : 参加型センシングにおける参加機会創出のための情報の価値付けと可視化システム (モバイルネットワークとアプリケーション)

坂村美奈, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 113 ( 495 ) page： 163 - 170 2014.3

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

近年,センサネットワークと携帯端末を利用したセンシングが普及しより高密度,広範囲の情報を取得することが可能になった.携帯端末を利用したセンシングの中でユーザが意識的にセンサとして働く参加型センシングでは,例えば場所や天気の様子に関するタスクを閲覧・選定し情報収集・提供する.しかしユーザがタスク選定をする際,多数のタスクが混在した状況ではどのタスクを実行すれば良いか分かり辛い.本研究では選定すべきタスクを物理センサを用いて価値付け,地図上に可視化することで参加型センシングへの参加機会を創出する手法を提案する.提案手法を実現するために,本研究ではセンサネットワークと参加型センシングが同一プラットフォームで動作する統合アーキテクチャを設計・実装した.これにより,センサネットワークおよび参加型センシングが持つ両者の利点を活かしつつ,互いの欠点を補完しあったセンシング環境が実現可能となる.

ClouT : スマートシティにおける市民の影響力を拡張するCloud of Things基盤技術(招待講演,モバイルアプリケーション,ユビキタスサービス,モバイルアドホックネットワーク,モバイル時代を支える次世代無線通信技術,ユビキタスシステム,フィールドセンシング及び一般) Reviewed

米澤拓郎

電子情報通信学会技術研究報告. MoNA, モバイルネットワークとアプリケーション Vol. 113 ( 495 ) page： . 2014.3

Help Me!:参加型センシングにおける参加機会創出のための情報の価値付けと可視化システム Reviewed

坂村美奈, 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. 2014 ( 35 ) page： 1-8 2014.3

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

近年，センサネットワークと携帯端末を利用したセンシングが普及しより高密度，広範囲の情報を取得することが可能になった．携帯端末を利用したセンシングの中でユーザが意識的にセンサとして働く参加型センシングでは，例えば場所や天気の様子に関するタスクを閲覧・選定し情報収集・提供する．しかしユーザがタスク選定をする際，多数のタスクが混在した状況ではどのタスクを実行すれば良いか分かり辛い．本研究では選定すべきタスクを物理センサを用いて価値付け，地図上に可視化することで参加型センシングへの参加機会を創出する手法を提案する．提案手法を実現するために，本研究ではセンサネットワークと参加型センシングが同一プラットフォームで動作する統合アーキテクチャを設計・実装した．これにより，センサネットワークおよび参加型センシングが持つ両者の利点を活かしつつ，互いの欠点を補完しあったセンシング環境が実現可能となる．

Help Me!:参加型センシングにおける参加機会創出のための情報の価値付けと可視化システム Reviewed

坂村美奈, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

研究報告モバイルコンピューティングとユビキタス通信（MBL） Vol. 2014 ( 35 ) page： 1-8 2014.3

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

EverCopter: 着脱可能な有線給電式空中センシングプラットフォーム

興野悠太郎, 米澤拓郎, 野崎大幹, 小川正幹, 伊藤友隆, 中澤仁, 高汐一紀, 徳田英幸

研究報告モバイルコンピューティングとユビキタス通信（MBL） Vol. 2014 ( 26 ) page： 1 - 7 2014.3

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

本論文では，着脱可能な電線によって充電，給電しながら上空をセンシングするプラットフォームである EverCopter を提案する．バッテリー駆動による UAV(Unmanned Aerial Vehicle) は，地上の障害物を気にする事無く，広大な範囲をセンシングできる事が最大のメリットであるが，バッテリー容量による制限を受けてしまう．EverCopter は以下の 2 つの特徴により，長時間かつ広範囲なセンシングを可能とする．まず，複数に接続された EverCopter の一方は，地上の電源装置に接続され，給電されている．このことで，それぞれの EverCopter はバッテリー無しで飛行する事ができるため，半永久的な飛行が可能となる．また，末端の EverCopter はバッテリーを備えており，任意のタイミングで着脱が可能である．よって，UAV 本来の自由なセンシングも可能である．The paper proposes EverCopter, which provides continuous and adaptive over-the-air sensing with detachable wired flying objects. While a major advantage of sensing systems with battery-operated flying objects is a wide sensing coverage, sensing time is limited due to its limited amount of energy. We propose dynamically rechargeable flying objects, called EverCopter. EverCopter achieves both long sensing time and wide sensing coverage by the following two characteristics. First, multiple EverCopters can be tied in a row by power supply cables. Since the root EverCopter in a row is connected to DC power supply on the ground, each EverCopter can fly without battery. This makes their sensing time forever, unless the power supply on the ground fails. Second, the leaf EverCopter can detach itself from the row in order to enjoy wider sensing coverage. An EverCopter, while it is detached, runs with its own battery-supplied energy. When the remaining energy becomes low, it flies back to the row to recharge the battery.

EverCopter: 着脱可能な有線給電式空中センシングプラットフォーム

興野悠太郎, 米澤拓郎, 野崎大幹, 小川正幹, 伊藤友隆, 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. 2014 ( 26 ) page： 1 - 7 2014.3

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

ClouT:スマートシティにおける市民の影響力を拡張するCloud of Things基盤技術 Reviewed

米澤拓郎

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. 2014 ( 53 ) page： 1-1 2014.3

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

現代の都市は,エネルギー管理の効率化,経済成長と開発,生活の質と安心安全など,多様な問題に直面している.こうした問題の解決に資する主要な ICT 技術として,近年,モノのインターネットとクラウドコンピューティングが脚光を浴びている.ClouT は,インターネットに接続する人・モノ・サービスをクラウドコンピューティングを基盤として融合する,効率的な協調プラットフォームである.あらゆる人・モノ・サービスから得られる情報を活用して,都市をよりスマートにする事が本研究の目的である.ClouT 上では,都市基盤を構成する情報サービスを都市の自治体等が提供し,他のプラットフォームや他のサービス提供者がそれを利用することができる.さらに,その都市に存在する人が,独自のサービスを創出して他の人と共有することができる.すなわち ClouT は,人を中心とした都市の情報基盤である.ClouT は以下の特徴を有する.まず,(1) インターネットに接続する無数の人やモノから都市の実空間情報を収集し,ユニバーサルなインタオペラビリティを保証しながらクラウド上に保持する.次に,(2) 大規模でディペンダビリティが高く,かつセマンティックなサービスを容易に構築可能とし,これにより多種多様な情報源から得られた情報を処理して都市の実空間に提供する.最後に,(3) 欧州の Santander と Genova,および日本では三鷹市と藤沢市をターゲットとして,革新的な都市アプリケーションを実現する.都市での利用を通じて,本研究の成果を具体的かつ実用的なものとする.また ClouT は,クラウドモデルにより実現される新たな自治体・民間の協力関係を用い,アプリケーションの新規創出に要する金銭的かつ時間的コストを削減し,自治体や住民,諸産業従事者等,都市に関する全てのステークホルダの共存共栄を図る.本講演では,本プロジェクトの概要とこれまでの成果,今後の展開について紹介を行う.

ClouT:スマートシティにおける市民の影響力を拡張するCloud of Things基盤技術 Reviewed

米澤拓郎

情報処理学会研究報告. MBL, [モバイルコンピューティングとユビキタス通信研究会研究報告] Vol. 2014 ( 53 ) page： 1-1 2014.3

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

Encouraging Team Behavior Modification Using Life Log Reviewed

Vol. 2014 ( 9 ) page： 1-8 2014.3

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

Currently, everyone can detect and store many life-log data very easily with the spread of smart phones or wearable devices and large scale data storage. Wide variety and large scale life-log data are very useful to self behavior change, medical care, education, and social analytics. Existing researches of human behavior change using life-log data focus on individual human behavior change. But nowadays everyone have communication equipment like smart phones. Group behavior change is very useful to keep workers' health in company and/or managing amount of practice in a sport team. Group has many kind of human relations, for example, manager and normal member. Therefore techniques for individual human behavior change is not effective to groups. The biggest aim of our research is to build the model of group behavior change. Specially, we focus on team behavior change. In this paper, we propose six types of group behavior model based on the "competition" and "collaboration" technique. We used encouraging team modification application in sports team and laboratory for keeping the sit-up exercise for 3 weeks. Sit-up exercise is very important to preventing the injury and keep fit for the sport team and the laboratory member. We create 8 groups in a team. We evaluate and consider this model based on the change of the self-efficacy and number of sit-up activities.

ClouT: Leveraging Cloud computing techniques for improving management of massive IoT data Reviewed Open Access

Jose Antonio Galache, Takuro Yonezawa, Levent Gurgen, Daniele Pavia, Marco Grella, Hiroyuki Maeomichi

2014 IEEE 7TH INTERNATIONAL CONFERENCE ON SERVICE-ORIENTED COMPUTING AND APPLICATIONS (SOCA) page： 324 - 327 2014

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

The Smart City concept relates to improve efficiency of city services and facilitate a more sustainable development of cities, as well as standing as the key concept for the future technological developments in Future Internet, IoT and, for the great quantity of information stored, big data and cloud computing. In this sense, this paper presents the ClouT project, a joint European-Japanese project, whose main aim is making citizens aware of city resources and helping them to use and care these resources by mean of smart IoT services in the Cloud. This objective is addressed through the definition of a three layer architecture composed of: CIaaS, CPaaS and CSaaS layers. On top of this architecture, different use cases associated to different application domains will be developed, mainly within the four cities that take part of the consortium: Mitaka and Fujisawa in Japan, and Santander and Genova in Europe.

DOI： 10.1109/SOCA.2014.47

SENSeTREAM: Enhancing online live experience with sensor-federated video stream using animated two-dimensional code Reviewed

Takuro Yonezawa, Masaki Ogawa, Yutaro Kyono, Hiroki Nozaki, Jin Nakazawa, Osamu Nakamura, Hideyuki Tokuda

UbiComp 2014 - Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing page： 301 - 305 2014

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

We propose a novel technique that aggregates multiple sensor streams generated by totally different types of sensors into a visually enhanced video stream. This paper shows major features of SENSeTREAM and demonstrates enhancement of user experience in an online live music event. Since SENSeTREAM is a video stream with sensor values encoded in a two-dimensional graphical code, it can transmit multiple sensor data streams while maintaining their synchronization. A SENSeTREAM can be transmitted via existing live streaming services, and can be saved into existing video archive services. We have implemented a prototype SENSe- TREAM generator and deployed it to an online live music event. Through the pilot study, we confirmed that SENSe- TREAM works with popular streaming services, and provide a new media experience for live performances. We also indicate future direction for establishing visual stream aggregation and its applications.

DOI： 10.1145/2632048.2632104

Flying display: A movable display pairing projector and screen in the air

Hiroki Nozaki

Conference on Human Factors in Computing Systems - Proceedings Vol. 2014 ( 10 ) page： 909 - 914 2014

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

We developed Flying Display, a novel movable public display system which can provide information to the people anywhere at anytime. This system consists of two UAVs (Unmanned Aerial Vehicles) with a projector and a screen. Flying Display achieves moving freely and keeping stable in 3-D space. Flying Display moves closer to people and gives information directly to them. To evaluate performance of Flying Display, we performed two experiments for adapting a flying control algorithm. We also showed the stability of Flying Display systems by trajectories of each UAV. This paper highlights the performance of Flying Display and discusses the Flying Display's potential for public displays in physical space.

DOI： 10.1145/2559206.2579410

Orchestration of Smart City Services across Ground, Air, and Space Reviewed

Jin Nakazawa, Hideyuki Tokuda, Yutaro Kyono, Takuro Yonezawa

2014 IEEE 7TH INTERNATIONAL CONFERENCE ON SERVICE-ORIENTED COMPUTING AND APPLICATIONS (SOCA) page： 332 - 333 2014

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

The paper proposes vertical/horizontal smart city service orchestration in terms of networking, sensing and actuation across ground, air and space. Smart city services should support in both usual and emergency situations, however, the system requirements to the different situation differs because network availability and sensing/acting priority are different among the situations. To fulfil various requirements for smart city serves, we present vertical/horizontal service orchestration through Fujisawa field trials in Japan.

DOI： 10.1109/SOCA.2014.28

Towards Health Exercise Behavior Change for Teams Using Life-logging Reviewed

Yuuki Nishiyama, Tadashi Okoshi, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

2014 IEEE 16TH INTERNATIONAL CONFERENCE ON E-HEALTH NETWORKING, APPLICATIONS AND SERVICES (HEALTHCOM) page： 397 - 403 2014

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

Recent technological trends on mobile/wearable devices and sensors have been enabling increasing number of people to collect and store their "life-logs" 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 "external competition" technique resulted the most effective performance for competitive teams such as sport teams.

DOI： 10.1109/HealthCom.2014.7001876

Classifying urban events' popularity by analyzing friends information in location-based social network. Reviewed

Makoto Kawano, Takuro Yonezawa, Jin Nakazawa, Satoshi Kawasaki, Ken Ohta, Hiroshi Inamura, Hideyuki Tokuda

The First International Conference on IoT in Urban Space, Urb-IoT 2014, Rome, Italy, October 27-28, 2014 page： 87 - 89 2014

LiPS: Linked participatory sensing for optimizing social resource allocation Reviewed

Mina Sakamura, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

UbiComp 2014 - Adjunct Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing page： 1015 - 1023 2014

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

This paper proposes a concept of linked participatory sensing, called LiPS, that divide a complex sensing task into small tasks and link each other to optimize social resource allocation. Recently participatory sensing have been spreading, but its sensing tasks are still very simple and easy for participants to deal with (e.g. Please input the number of people standing in a queue. etc.). To adapt to high-level tasks which require specific skills such as those in engineering, the medical profession or authority such as the organizer of the event, we need to optimize social resource allocation because the number of such professionals are limited. To achieve the complex sensing tasks efficiently, LiPS enables to divide a complex sensing task into small tasks and link each other by assigning proper sensors. LiPS can treat physical sensors and human as hybrid multi-level sensors, and task provider can arrange social resource allocation for the goal of each divided sensing task. In this paper, we describe the design and development of the LiPS system. We also implemented an in-lab experiment as the first prototype of hybrid sensing system and discussed the model of further system through users' feedback. Copyright 2014 ACM.

DOI： 10.1145/2638728.2641286

Help me!: Valuing and visualizing participatory sensing tasks with physical sensors Reviewed

Mina Sakamura, Takuro Yonezawa, Jin Nakazawa, Kazunori Takashio, Hideyuki Tokuda

ACM International Conference Proceeding Series page： 3:1-3:6 2014

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

Recent progress of mobile devices such as smartphones enables human to leverage their perception ability as a part of sensing framework. This sensing framework, so called participatory sensing, distributes various sensing tasks (e.g., whether report, waiting time in a queue, traffic conditions etc.) to possible participants. Then, participants can select and achieve the sensing tasks. However, in the coming future with the rapid growth of participatory sensing and increasing number of sensing tasks, it must be very hard for users to choose appropriate sensing tasks around them. To solve this problem, we propose a system called Help Me!, which can value and visualize importance of sensing tasks by quantifying them in cooperation with physical sensors. Since Help Me! system provides objective index for sensing tasks, it enhances opportunity for users to participate to sensing tasks. We designed and implemented Help Me! system as an integrated architecture of physical sensors and participatory sensors. Through initial in-lab experiment, we confirmed that Help Me! system can enhance opportunity to participate to sensing tasks for users. © 2014 ACM.

DOI： 10.1145/2637064.2637095

Vinteraction: Vibration-based information transfer for smart sensing devices Reviewed

Yonezawa T., Nakazawa J., Tokuda H.

ACM International Conference Proceeding Series 2014

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ACM International Conference Proceeding Series

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 vibration-based communication that can be adapted to any combination of smart devices. © 2014 ACM.

DOI： 10.1145/2637064.2637101

Proceedings of the 2014 International Workshop on Web Intelligence and Smart Sensing, IWWISS '14, Saint Etienne, France, September 1-2, 2014 Reviewed

IWWISS 2014 2014

Monitoring Dependability of City-scale IoT Using D-Case Reviewed

Hideyuki Tokuda, Yonezawa Takuro, Jin Nakazawa

2014 IEEE WORLD FORUM ON INTERNET OF THINGS (WF-IOT) page： 371 - 372 2014

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

City-scale IoT, a fundamental infrastructure for smart cities, requries to sense a range of ubiquitous entities in a city including humans, objects, and spaces. Ubiquitous sensor networks (USN) is the key technology to this. However, failures of a USN may result in hazards in our daily lives in smart cities. Monitoring of USN, rapid detection of faults and failures, and recovery from them are thus important for better applications of USN. This paper proposes a means to do so comprehensively by using Dependability Cases (D-Case). Since USN is a system composed of variety of components such ash wireless sensor nodes, database servers, and network appliances, we need a tool that can target them in common. Our tool enables to execute monitoring programs on a D-Case diagram, which is represented with Goal Structuing Notation (GSN), so that it can target a variety of devices and services.

DOI： 10.1109/WF-IoT.2014.6803192

International Workshop on Web Intelligence and Smart Sensing IWWISS'2014 Reviewed

Pierre Maret, Fuyuki Ishikawa, Satoshi Honda, Takuro Yonezawa, Rajendra Akerkar, Till Riedel

ACM International Conference Proceeding Series page： 1:1-1:6 2014

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

The main objective of the IWWISS 2014 is to explore whether the underlying ideas of Web Intelligence and technologies can meet the domain of Smart Sensors to allow the development of an open information space which we call the Smart Sensing Web. The Smart Sensing Web unifies the real and the virtual world by integrating sensor technologies and Web intelligence technologies. © 2014 ACM.

DOI： 10.1145/2637064.2637088

イベント参加者のフォロー関係に基づくイベント分類手法の提案 Reviewed

河野慎 , 米澤拓郎 , 中澤仁 , 川崎仁嗣 , 太田賢 , 稲村浩 , 徳田英幸

情報処理学会研究報告. MBL, [モバイルコンピューティングとユビキタス通信研究会研究報告] Vol. 2013 ( 3 ) page： 1 - 6 2013.12

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

近年 GPS が搭載されたスマートフォンや SNS の普及によって,ユーザがリアルタイムに位置情報を付加させた情報を発信できるようになってきた.これらの位置情報付き発言を収集・解析することで,人々が集まって形成されるソーシャルイベントを検出することが可能となる.ソーシャルイベントを検出するには発見と分類の 2 段階の過程があり,本研究ではイベントが発見された後の分類手法を提案する.イベントには特徴・性質として内容・規模・大衆性の 3 つがあると考え、分類軸として大衆性に着目する.位置情報を付与させて発言しているイベント参加者のフォロー関係を解析することで大衆性の推定をし,イベントの分類を目指す.本研究ではリアルタイムに解析を行えるツールを設計・実装し,大衆性の推定手法について考察を行った.

Synchrometer: Creating similarity of daily activity with others in lifelong environment

勝治宏基, 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. 2013 ( 17 ) page： 1 - 7 2013.10

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

Recently, because of miniaturization and low cost of the sensing devices, obtaining human behavior became more easier . Therefore, lifelog, which is getting and storing our daily life activities, became to be studied widely. In this study, we propose the system Synchrometer which create a similarity as similar-activity from two people's daily activity. Similar-activity have a possibility to use to behavioral improvements, medical, nursing, generating new communication and so on.

Synchrometer: Creating similarity of daily activity with others in lifelong environment

勝治宏基, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

IPSJ SIG technical reports Vol. 2013 ( 17 ) page： 1 - 7 2013.10

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

チームの動機づけにおける個人の貢献度の可視化に関する一検討 (知的環境とセンサネットワーク) Reviewed

西山勇毅, 米澤拓郎, 中澤仁, 徳田英幸

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 113 ( 38 ) page： 233-240 2013.5

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

近年,個人の動機付けや行動改善のためのアプリケーションが普及してきた.今後,研究プロジェクトチームやスポーツチームなどの明確な目標を持ち,様々な立場の人間が所属するチームでの利用が考えられる.本研究では,個人の貢献度の可視化がチームの動機づけに与える影響の調査を行った.情報共有アプリケーションを実装し,ランダムに抽出したチームに対して,他人に個人の貢献度を見せた場合と見せない場合での比較実験を行い評価した.

ラッキーなう : 時間と場所情報に注目した公共ディスプレイとのインタラクションモデルとその応用 (知的環境とセンサネットワーク) Reviewed

小川正幹, ユルムマルコ, 米澤拓郎, 中澤仁, 徳田英幸

電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 Vol. 113 ( 38 ) page： 199-206 2013.5

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

近年,ディスプレイの低価格化や,デジタルサイネージをはじめとする電子コンテンツへの関心の増加により,公共ディスプレイが普及して来た.それにともない,ユーザからの入力によってニーズに応じた情報を提供するインタラクティブな公共ディスプレイも登場して来た.現在インタラクティブな公共ディスプレイの持つ課題の一つとして,ディスプレイがユーザに対して有益である事を,ユーザへ伝える事が難しいという点が挙げられる.この間題を解決する事により,インタラクティブな公共ディスプレイへの関心や,利用頻度の向上が達成されると考えられる.本稿では,時間と場所を限定することでユーザに特別感を与える公共ディスプレイとのインタラクションモデルを提案する.その一例として,その時その場所にいた人々だけに配布され,かつその人だけが利用可能なクーポン配信アプリケーションを構築し評価実験を行い,本研究で提案したインタラクションモデルの有用性を示した.

Synchrometer : ライフログを利用した他者との生活スタイルのシンクロ度合判定手法(ポスターセッション,フレッシュマンセッション及び一般)

勝治宏基, 米澤拓郎, 中澤仁, 徳田英幸

電子情報通信学会技術研究報告. ASN, 知的環境とセンサネットワーク Vol. 113 ( 38 ) page： 185 - 186 2013.5

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

近年,センシングデバイスの小型化,低価格化により,ウェアラブルセンサを利用して人の行動を取得する事が容易になった.それにより,私達の日々の生活行動を自動的に取得,蓄積するライフログが幅広く研究される様になった.本研究では,自分と他人の一日の行動から二人の似た行動をシンクロした行動として取得するシステムSynchrometerを提案する.取得したシンクロは行動改善や医療,介護,新しいコミュニケーションの生成など,様々な場で利用する事が可能である.

動的かつ不定形な対象に投影するプロジェクションマッピング手法の提案(ポスターセッション,フレッシュマンセッション及び一般) Reviewed

興野悠太郎, 小川正幹, 米澤拓郎, 中澤仁, 徳田英幸

電子情報通信学会技術研究報告. ASN, 知的環境とセンサネットワーク Vol. 113 ( 38 ) page： 187 - 188 2013.5

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

近年,スクリーン以外を対象として映像を投影するプロジェクションマッピングが盛んとなっている.しかし,現在のプロジェクションマッピングでは,静的な物体に対して投影されているものがほとんどで,移動している物体や形が変わる対象に投影する場合,あらかじめ複雑なキャリブレーションが必要な事から,あまり取り組まれていない.しかし,これらの物体に投影する事で,よりダイナミックで演出効果の高い表現を実現できると考えられる.本研究では,動的かつ不定形の物体に対し,事前のキャリブレーションを必要とすることなく,対象の状況を動的に判別し,投影を可能とする手法を実現する.

動的かつ不定形な対象に投影するプロジェクションマッピング手法の提案 Reviewed

興野悠太郎, 小川正幹, 米澤拓郎, 中澤仁, 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. 2013 ( 48 ) page： 1-2 2013.5

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

近年，スクリーン以外を対象として映像を投影するプロジェクションマッピングが盛んとなっている．しかし，現在のプロジェクションマッピングでは，静的な物体に対して投影されているものがほとんどで，移動している物体や形が変わる対象に投影する場合，あらかじめ複雑なキャリブレーションが必要な事から，あまり取り組まれていない．しかし，これらの物体に投影する事で，よりダイナミックで演出効果の高い表現を実現できると考えられる．本研究では，動的かつ不定形の物体に対し，事前のキャリブレーションを必要とすることなく，対象の状況を動的に判別し，投影を可能とする手法を実現する．

Virtual Sensor Networks: Its Principles and Applications Reviewed

Jin Nakazawa, Takuro Yonezawa, Tomotaka Ito, Kazunori Takashio, Hideyuki Tokuda

Vol. 2013 ( 17 ) page： 1 - 6 2013.5

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

This paper proposes a infrastructural mechanism, called Virtual Networked Sensing (VNS), which is capable of creating virtual networks of sensors coping with concerns of applications and integrating a variety of in-network services to ease application development. It enables appications to create a Virtual Sensor Network (VSN), to which it can map existing sensors based on its concerns, such as environmental monitoring and detecting group activities in a city. This paper shows the mechanism's features by introducing an actual application and its behavior.

チームの動機づけにおける個人の貢献度の可視化に関する一検討 Reviewed

西山勇毅, 米澤拓郎, 中澤仁, 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. 2013 ( 21 ) page： 1-8 2013.5

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

近年，個人の動機付けや行動改善のためのアプリケーションが普及してきた．今後，研究プロジェクトチームやスポーツチームなどの明確な目標を持ち，様々な立場の人間が所属するチームでの利用が考えられる．本研究では，個人の貢献度の可視化がチームの動機づけに与える影響の調査を行った．情報共有アプリケーションを実装し，ランダムに抽出したチームに対して，他人に個人の貢献度を見せた場合と見せない場合での比較実験を行い評価した．

Synchrometer：ライフログを利用した他者との生活スタイルのシンクロ度合判定手法

勝治宏基, 米澤拓郎, 中澤仁, 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. 2013 ( 47 ) page： 1 - 2 2013.5

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

近年，センシングデバイスの小型化，低価格化により，ウェアラブルセンサを利用して人の行動を取得する事が容易になった．それにより，私達の日々の生活行動を自動的に取得，蓄積するライフログが幅広く研究される様になった．本研究では，自分と他人の一日の行動から二人の似た行動をシンクロした行動として取得するシステム Synchrometer を提案する．取得したシンクロは行動改善や医療，介護，新しいコミュニケーションの生成など，様々な場で利用する事が可能である．

Fragwrap: Fragrance-encapsulated and projected soap bubble for scent mapping Reviewed

Yutaro Kyono, Hideyuki Tokuda, Takuro Yonezawa, Hiroki Nozaki, Jin Nakazawa

UbiComp 2013 Adjunct - Adjunct Publication of the 2013 ACM Conference on Ubiquitous Computing page： 311 - 314 2013

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

This paper proposes FRAGWRAP which maps scent to real objects in real-time. To achieve this purpose, we leverage fragrance-encapsulated soap bubble with projection mapping technique. Since human olfaction is known as combined utilization of his/her eyes and nose, we encapsulate fragrance into bubble soap to stimulate the nose and also project 3D image of the fragrance to the bubble soap in real-time. In this video, we present our first prototype which automatically inserts fragrance into a soap bubble and also projects images to the moving bubble. All system is activated by speech recognition.

DOI： 10.1145/2494091.2494187

Reinforcing co-located communication practices through interactive public displays Reviewed

Masaki Ogawa, Jin Nakazawa, Marko Jurmu, Kazunori Takashio, Tomotaka Ito, Hideyuki Tokuda, Takuro Yonezawa

UbiComp 2013 Adjunct - Adjunct Publication of the 2013 ACM Conference on Ubiquitous Computing page： 737 - 740 2013

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

In recent years, the steady emergence of digital communication, especially social media, has increased the 'placelessness' of inter-person communication practices, i.e., lessening the need to reside co-located in order to communicate. When these communication practices carry over to co-located settings, they introduce redundancy and potentially even harm the co-located context, since use of personal technologies tends to isolate users from their surroundings. In this position paper, we want to raise awareness on how interactive public displays could alleviate this redundancy and potential isolation. We present a model of reinforcing co-located communications, and illustrate it through example use cases. Copyright © 2013 ACM.

DOI： 10.1145/2494091.2495998

PARnorama: 360 Degree interactive video for augmented reality prototyping Reviewed

Matthias Berning, Jin Nakazawa, Takuro Yonezawa, Michael Beigl, Till Riedel, Hide Tokuda

UbiComp 2013 Adjunct - Adjunct Publication of the 2013 ACM Conference on Ubiquitous Computing page： 1471 - 1474 2013

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

Designing novel and meaningful interactions in the domain of Augmented Reality (AR) requires an efficient and appropriate methodology. A user centered design process requires the construction and evaluation of several prototypes with increasing technical fidelity. Although the main content of the application can already be conveyed with prerendered video, one of the main interactions in AR - The user-selected viewpoint - is only available in a very late stage. We propose the use of panoramic 360? video for scenario based user evaluation, where the user can select his point of view during playback. Initial users report a high degree of immersion in the constructed scenario, even for handheld AR.

DOI： 10.1145/2494091.2499570

Evercopter: Continuous and adaptive over-the-air sensing with detachable wired flying objects Reviewed

Yutaro Kyono, Tomotaka Ito, Takuro Yonezawa, Jin Nakazawa, Hiroki Nozaki, Kazunori Takashio, Masaki Ogawa

UbiComp 2013 Adjunct - Adjunct Publication of the 2013 ACM Conference on Ubiquitous Computing page： 299 - 302 2013

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

The paper proposes EverCopter, which provides continuous and adaptive over-the-air sensing with detachable wired flying objects. While a major advantage of sensing systems with battery-operated MAVs is a wide sensing coverage, sensing time is limited due to its limited amount of energy. We propose dynamically rechargeable flying objects, called EverCopter. EverCopter achieves both long sensing time and wide sensing coverage by the following two characteristics. First, multiple EverCopters can be tied in a row by power supply cables. Since the root EverCopter in a row is connected to DC power supply on the ground, each EverCopter can fly without battery. This makes their sensing time forever, unless the power supply on the ground fails. Second, the leaf EverCopter can detach itself from the row in order to enjoy wider sensing coverage. An EverCopter, while it is detached, runs with its own battery-supplied energy. When the remaining energy becomes low, it flies back to the row to recharge the battery.

DOI： 10.1145/2494091.2494183

Second-sighted glasses : Discovering and understanding context-Aware services with augmented reality technique Reviewed

Takuro Yonezawa, Hideyuki Tokuda

Proceedings of the SICE Annual Conference page： 2386 - 2391 2013

Temperature distributions of electron beam-irradiated samples by scanning electron microscopy Reviewed

Tokunaga, T; Narushima, T; Yonezawa, T; Sudo, T; Okubo, S; Komatsubara, S; Sasaki, K; Yamamoto, T

JOURNAL OF MICROSCOPY Vol. 248 ( 3 ) page： 228 - 233 2012.12

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Microscopy

An electron beam (EB) generated by a scanning electron microscope (SEM) was used to irradiate two samples having different thermal conductivities, and the resulting temperatures of the EB-irradiated areas as well as the temperature distributions within the samples were then measured using a thermal camera. These measurements showed overall increases in sample temperatures, as well as revealed temperature rises at the EB-irradiated areas that had little difference with one of the theoretical predictions. Differences between the actual and the predicted temperature measurements were analysed in terms of the accuracy with which parameters could be estimated. The temperature distributions of the samples were measured and, On the basis of the results, it was hypothesized that the temperature differential over an irradiated sample will be inversely correlated with its thermal conductivity. © 2012 Royal Microscopical Society.

DOI： 10.1111/j.1365-2818.2012.03666.x

PubMed

Detection, classification and visualization of place-triggerd geotagged tweets Reviewed

Hiruta S., Yonezawa T., Jurmu M., Tokuda H.

Ubicomp 12 Proceedings of the 2012 ACM Conference on Ubiquitous Computing page： 956 - 963 2012.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ubicomp 12 Proceedings of the 2012 ACM Conference on Ubiquitous Computing

This paper proposes and evaluates a method to detect and classify tweets that are triggered by places where users locate. Recently, many related works address to detect real world events from social media such as Twitter. However, geotagged tweets often contain noise, which means tweets which are not content-wise related to users' location. This noise is problem for detecting real world events. To address and solve the problem, we define the Place-Triggered Geotagged Tweet, meaning tweets which have both geotag and content-based relation to users' location. We designed and implemented a keyword-based matching technique to detect and classify place-triggered geotagged tweets. We evaluated the performance of our method against a ground truth provided by 18 human classifiers, and achieved 82% accuracy. Additionally, we also present two example applications for visualizing place-triggered geotagged tweets. Copyright 2012 ACM.

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

Doan G., Nguyen M., Takimoto T., Yonezawa T., Nakazawa J., Takashio K., Tokuda H.

Ubicomp 12 Proceedings of the 2012 ACM Conference on Ubiquitous Computing page： 539 - 540 2012.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Ubicomp 12 Proceedings of the 2012 ACM Conference on Ubiquitous Computing

Deploying Wireless Sensor Networks (WSN) securely still requires users to have certain skills and exert effort. In the near "sensor everywhere" future, a much simpler method for deploying WSN will be necessary for end-users. We propose LiDSN(Light Communication for Deploying Secure Wireless Sensor Networks) which enables users to achieve deployment tasks via simple interaction. LiDSN leverages light-based communication between an LED and a light sensor in order to add a new sensor node securely into existing WSN. Through touching interaction, a new sensor node ID and secret key can be transmitted to the WSN, and then the WSN is able to identify which node should be added while maintaining the security of the WSN. Copyright 2012 ACM.

Empowering Human and Objects with Virtual Networked Sensing and Applications

TOKUDA Hideyuki, NAKAZAWA Jin, YONEZAWA Takuro, AIDA Haruto, ITO Tomotaka

IEICE technical report. Information networks Vol. 112 ( 230 ) page： 49 - 53 2012.10

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

We presents Virtual Networked Sensing architecture, which integrates multiple physical sensor network as virtual sensor network to create various applications. We also develop 3 categories of applications-Sense of Objects, Sense of People and Sense of Society, based on Virtual Networked Sensing architecture.

Control Manually:視聴者協力型ライブ演出システムによるコミュニケーションと演出効果の拡張

米澤拓郎, 徳田英幸

研究報告エンタテインメントコンピューティング（EC） Vol. 2012 ( 8 ) page： 1 - 8 2012.7

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

インターネット生放送の利点の一つに，配信者と視聴者間の密なコミュニケーションが可能である点が挙げられるが，現状ではコメントを通じた双方向性に限られている．生放送コンテンツとして楽器の演奏が挙げられるが，演奏中は集中しているため，コメントによる視聴者とのコミュニケーションは希薄となる．本研究では演奏配信に適した新たなコミュニケーション手段として，視聴者が演奏者の配信環境を制御し，演出を行うことでコミュニケーションを可能とする視聴者協力型ライブ演出システムを提案する．4 週間に及ぶ配信実験の結果，同システムを用いることで演奏者と視聴者間，および視聴者間での非言語コミュニケーションが創発され，生放送参加者の一体感の拡大につながるとともに，ズームインやパン，カメラの切り替えなどのカメラワークによって演出効果が向上したことを示す．また実験結果に基づき，将来のインタラクティブ生放送支援システムのデザインの指針を示す．

Control Manually:視聴者協力型ライブ演出システムによるコミュニケーションと演出効果の拡張

米澤拓郎, 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. 2012 ( 8 ) page： 1 - 8 2012.7

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

セキュアな光通信を用いたWSN構築手法

グエン・ゾアン・ミン・ザン, 瀧本拓哉, 米澤拓郎, 中澤仁, 高汐一紀, 徳田英幸

研究報告エンタテインメントコンピューティング（EC） Vol. 2012 ( 3 ) page： 1 - 6 2012.7

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

現在，多数のセンサノードから成る Wireless Sensor Network (WSN) が普及しつつある．また健康モニタリングシステムや警備システムなど WSN を用いた様々なアプリケーションが開発されている．本研究では将来的にそれらの WSN やアプリケーションが，家庭など身近な環境に普及していくと想定している．そうした環境においてはエンドユーザは自分でセンサノードを購入して，自分で家に設置し利用である必要がある．しかし，現在提案されている WSN を構築するための手法では，WSN に関する知識や経験が必要となるため，エンドユーザが利用するのは困難である．本研究ではセキュアな光通信を用いた WSN 構築手法，LiDSN を提案する．

セキュアな光通信を用いたWSN構築手法

グエン・ゾアン・ミン・ザン, 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. 2012 ( 3 ) page： 1 - 6 2012.7

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

A-15-20 Implementation and Evaluation of Vibration-based Information Transfer for Smart Devices Reviewed

Yonezawa Takuro, Nakazawa Jin, Tokuda Hideyuki

Proceedings of the IEICE General Conference Vol. 2012 page： 240 - 240 2012.3

D-5-1 Detection and Visualization of Place-triggered Geotagged Tweets Reviewed

Hiruta Shinya, Yonezawa Takuro, Nakazawa Jin, Takashio Kazunori, Tokuda Hideyuki

Proceedings of the IEICE General Conference Vol. 2012 ( 1 ) page： 48 - 48 2012.3

Detection, Classification and Visualization of Place-triggerd Geotagged Tweets Reviewed

Hiruta, S; Yonezawa, T; Jurmu, M; Tokuda, H

UBICOMP'12: PROCEEDINGS OF THE 2012 ACM INTERNATIONAL CONFERENCE ON UBIQUITOUS COMPUTING page： 956 - 963 2012

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

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

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

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.

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.

Retrieving Environmental Smartness with Second-sighted Glasses

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

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

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

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

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

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

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.

Middleware for Detection Indecision

ARAKI Takayoshi, YONEZAWA Takuro, NAKAZAWA Jin, TAKASHIO Kazuki, TOKUDA Hideyuki

IEICE technical report Vol. 109 ( 338 ) page： 13 - 18 2009.12

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

The advancement of information technology provides customers various ways to purchase products, and large number of customers are buying products online rather than buying them at brick-and-motor stores. In spite of that, customers are stimulated to purchase products at brick-and-motor stores through the use of QR code and digital cash. It is said that customers will be more encouraged to buy products at brick-and-motor stores by adapting new technologies, such as RFID and electronic device. In consequence, firing clerks and less jobs being required are resulting in less communication between customers and clerks. Communication between customers and clerks increases the chance of customers purchasing products, and enables customers to the choose most desired products. Thus, in order to improve the convenience of brick-and-motor stores, it is important to encourage clerks to have communication with customers. Although, there is a proper timing to wait on a customer, and there is a great chance of making customers feel uncomfortable as a result of wrong timing or way of service. In order to solve this problem, we aim to assist customers and brick-and-motor stores by detecting customers' "indecision" when purchasing products.

FASH: Detecting tiredness of elders Reviewed

Yonekawa K., Yonezawa T., Nakazawa J., Tokuda H.

Inss2009 6th International Conference on Networked Sensing Systems 2009.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Inss2009 6th International Conference on Networked Sensing Systems

This paper proposes Fatigue Alerting SHoes(FASH), a pair of shoes which prevents walking elders from falling accidents. Fatigue is one of the causes of elders encountering falling accidents, thus, FASH detects fatigue of walking people. FASH embeds pressure sensor in shoes to detects tiredness of walking people, and prevent falling accidents by alerting them. ©2009 IEEE.

DOI： 10.1109/INSS.2009.5409908

Fatigue Alerting SHoes

YONEKAWA Kenji, YONEZAWA Takuro, YURA Jun'ichi, NAKAZAWA Jin, TAKASHIO Kazuki, TOKUDA Hideyuki

全国大会講演論文集 / 情報処理学会 [編] Vol. 71 ( 3 ) page： "3 - 301"-"3-302" 2009.3

MIDEIN : MIddleware for DEtecting INdecision Reviewed Open Access

ARAKI Takayoshi, YONEZAWA Takuro, NAKAZAWA Jin, TAKASHIO Kazuki, TOKUDA Hideyuki

Vol. 71 ( 0 ) page： 303-304 2009.3

Fatigue Alerting SHoes

米川賢治, 米澤拓郎, 由良淳一, 中澤仁, 高汐一紀, 徳田英幸

全国大会講演論文集 Vol. 71 ( 0 ) page： 301 - 302 2009.3

SYNTHETIC STUDIES OF MANGOSTIN DERIVATIVES WITH AN INHIBITORY ACTIVITY ON PDGF-INDUCED HUMAN AORTIC SMOOTH CELLS PROLIFERATION Reviewed Open Access

Nishihama, Y; Ogamino, T; Shi, WL; Cha, BY; Yonezawa, T; Teruya, T; Nagai, K; Suenaga, K; Woo, JT; Nishiyama, S

HETEROCYCLES Vol. 77 ( 2 ) page： 759 - 765 2009.2

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

The mangostin derivatives 310, were synthesized by halogenation, electrochemical oxidation, and mCPBA oxidation of α- and γ-mangostins (1, 2). Among them, the hydroxyl 9 and the benzopyran 10 derivatives produced by mCPBA, showed remarkable antiproliferative activities against human aortic smooth muscle cells (HASMC) induced by platelet-derived growth factor (PDGF). © 2009 The Japan Institute of Heterocyclic Chemistry All rights reserved.

DOI： 10.3987/COM-08-S(F)65

SOEML: Smart object events modeling language based on temporal intervals Reviewed

Takuro Yonezawa, Jin Nakazawa, Goro Kunito, Tomohiro Nagata, Hideyuki Tokuda

International Journal of Multimedia and Ubiquitous Engineering Vol. 4 ( 3 ) page： 73 - 92 2009

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

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

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.

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.

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.

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

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

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.

Collaboration Scheme Based on Blockable Appliances for Ubiquitous Environment Reviewed Open Access

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

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

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

Synthesis, single crystal X-ray analysis, and TEM for a single-sized Au11 cluster stabilized by SR ligands: The interface between molecules and particles Reviewed

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

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 <inf>11</inf>(S-4-NC<inf>5</inf>H<inf>4</inf>)<inf>3</inf>(PPh<inf>3</inf>) <inf>7</inf> (1), has been synthesized by NaBH<inf>4</inf> reduction of Au(S-py)(PPh<inf>3</inf>) or by reacting [Au<inf>9</inf>(PPh<inf>3</inf>) <inf>8</inf>](NO<inf>3</inf>)<inf>3</inf> 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 CH<inf>2</inf>Cl<inf>2</inf> 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

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.

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