Details of a Researcher - OKOSHI Tadashi

Papers - OKOSHI Tadashi

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Poster: Extensive evaluation of emotional contagion on smiling selfies over social network

W Sasaki, M Obuchi, K Egashira, N Isokawa, Y Furukawa, Y Nishiyama, ...

Proceedings of the 15th Annual International Conference on Mobile Systems … (ACM Press) 180 2017

Joint Work, Accepted, ISSN 9781450349284

© 2017 Copyright held by the owner/author(s). We propose "SmileWave", the first selfie social networking service to reveal the existence of emotional cognation through smiling selfies on the social network. We conducted multiple rounds of in-the-wild user studies with 86 cumulative total users for total duration of 5 weeks. Throughout the entire study, we confirmed the occurrence of smile-based emotional contagion over social network, not only in the momentary duration but in longer term period.

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People's interruptibility in-the-wild: analysis of breakpoint detection model in a large-scale study

K Tsubouchi, T Okoshi

Proceedings of the 2017 ACM International Joint Conference on Pervasive and … (ACM Press) 922 - 927 2017

Joint Work, Accepted, ISSN 9781450351904

In the advancing ubiquitous computing where users have been having an increasing amount of push-style information provision from lots of intelligent proactive services, detecting the users' current attentional status and/or in-terruptibility has been a significant issue. In our previous study[7] on interruptibility detection in "Yahoo! JAPAN" real world product for 21 days with more than 680,000 users, the result showed significant lower user response time in exchange for notification delivery delay for about 4 minutes on average. In this paper, we further analyze the features in the interruptibility detection model trained and updated during this study in nightly basis for 21 days and report the results. Copyright held by the owner/author(s).

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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

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) 2017 (12), 1-8 (情報処理学会) 2017-UBI54 ( 12 ) 1 2017

Joint Work

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

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， ...

研究報告モバイルコンピューティングとパーベイシブシステム (MBL) 2017 (12), 1-6 2017-UBI53 ( 12 ) 1 2017

Joint Work

Keynote speaker 1

T Okoshi

2017 International Electronics Symposium on Knowledge Creation and … 2017

Interruptibility Map: Geographical analysis of users' interruptibility in smart cities

M Obuchi, T Okoshi, T Yonezawa, J Nakazawa, H Tokuda

2017 IEEE International Conference on Pervasive Computing and Communications … (IEEE) 357 - 362 2017

Joint Work, Accepted, ISSN 9781509043385

© 2017 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.

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Intelligent notification and attention management on mobile devices

D Weber, A Voit, A Exler, S Schröder, M Böhmer, T Okoshi

Proceedings of the 16th International Conference on Mobile and Ubiquitous … (ACM) 561 - 565 2017

Joint Work, Accepted, ISSN 9781450353786

© 2017 Copyright is held by the owner/author(s). Today, many users of mobile devices are continuously confronted with a huge variety of information: notifications from Facebook, new application updates, won badges, or reminders. This leads to an information overload, which makes it hard to stay focused. This workshop will investigate approaches towards smart attention management systems. We will discuss the fundamental challenges of smart notifications and the design of proactive notification mechanisms. We invite submissions that focus on the understanding of users and their current, mobile information handling. We further appreciate contributions that propose design concepts for the interaction with smart attention management systems. The expected workshop outcome is a summary of emerging challenges in the design and development of smart attention management systems as well as approaches to address them.

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HealthFight: 多数決を用いた食習慣改善ソーシャルメディア

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， ...

研究報告高齢社会デザイン (ASD) 2017 (16), 1-7 2017-UBI55 ( 16 ) 1 2017

Joint Work

Attention and engagement-awareness in the wild: A large-scale study with adaptive notifications

T Okoshi, K Tsubouchi, M Taji, T Ichikawa, H Tokuda

2017 IEEE International Conference on Pervasive Computing and Communications … (IEEE) 100 - 110 2017

Joint Work, Accepted, ISSN 9781509043279

© 2017 IEEE. In today's advancing ubiquitous computing age, with its ever-increasing amount of information from various applications and services available for consumption, the management of people's attention has become very important. In particular, the high volume of notifications on mobile devices has become a major cause of interruption of users. There has been much research aimed at detecting the opportune moment to present such information to users with in a way that lowers the cognitive load or frustration. However, evaluation of such systems in the real-world production environment with real users and notifications, and evaluation on user's engagement to the presented notification beyond simple responsiveness have not been adequately studied. To the best of our knowledge, this study is the first to investigate user interruptibility and engagement using a real-world large-scale mobile application and real-world notifications consisting of actual news content. We equipped the Yahoo! JAPAN Android app, one of the most popular applications on the national market, with our mobile-sensing and machine-learning-based interruptibility estimation logic. We conducted a large-scale in-the-wild user study with more than 680,000 users for three weeks. The results show that in most cases delaying the notification delivery until an interruptible moment is detected is beneficial to users and results in significant reduction of user response time (49.7%) compared to delivering the notifications immediately. We also observed a higher number of notifications opened in our system as well as constant improvement in user engagement levels throughout the entire study period.

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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

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， ...

研究報告ユビキタスコンピューティングシステム (UBI) 2017 (27), 1-7 2017-UBI53 ( 12 ) 1 2017

Joint Work

2017 International Electronics Symposium on Engineering Technology and Applications (IES-ETA)

T Okoshi, D Pramadihanto, E Purwanto, A Siahaan, IA Firstantara, ...

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

井上義之，米澤拓郎，大越匡，中澤仁

研究報告ヒューマンコンピュータインタラクション (HCI) 2017 (6), 1-8 2017-UBI56 ( 6 ) 1 2017

Joint Work

UbiTtention 2017: 2nd international workshop on smart & ambient notification and attention management

T Okoshi, A Exler, A Voit, D Weber, M Pielot, B Poppinga, N Henze, ...

Proceedings of the 2017 ACM International Joint Conference on Pervasive and … (ACM Press) 893 2017

Joint Work, Accepted

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TalkingNemoPad: Aquarium Fish Talks Its Mind for Breeding Support through Your iPad

礒川直大，西山勇毅，大越匡，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パーベイシブシステム (MBL) 2017 (26), 1-8 2017-UBI53 ( 12 ) 1 2017

Joint Work

UbiTtention: Smart & ambient notification and attention management

Voit A., Henze N., Poppinga B., Gehring S., Weber D., Okoshi T., Böhmer M., Pejovic V.

UbiComp 2016 Adjunct - Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp 2016 Adjunct - Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing) 1520 - 1523 2016.09

ISSN 9781450344623

© 2016 ACM. Users of digital devices are increasingly confronted with a tremendous amount of notifications that appear on multiple devices and screens in their environment. Today many users own different ubiquitous devices such as a smartphone, a tablet, a notebook and a smartwatch. If an email client is installed on every device an incoming email produces up to four notifications - one on each device. In the future, we will receive notifications from an increasing number of ubiquitous devices. Therefore, we need smart attention management for incoming notifications as well as novel ways to present and interact with notifications. One way for a less interrupting attention management could be the use of ambient representations of incoming notifications. This workshop brings together researchers and practitioners from academia and industry to explore how the flood of notifications on different computing devices and in smart environments can be managed, to avoid information overload.

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Smarttention, please! 2nd workshop on intelligent attention management on mobile devices

Weber D., Poppinga B., Shirazi A., Pielot M., Gehring S., Okoshi T., Henze N.

Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services Adjunct, MobileHCI 2016 (Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services Adjunct, MobileHCI 2016) 914 - 917 2016.09

ISSN 9781450344135

Today, many users of mobile devices are continuously confronted with a huge variety of information: notifications from Facebook, new application updates, won badges, or reminders. This leads to an information overload, which makes it hard to stay focused. This workshop will investigate approaches towards smart attention management systems. We will discuss the fundamental challenges of smart notifications and the design of proactive notification mechanisms. We invite submissions that focus on the understanding of users and their current, mobile information handling. We further appreciate contributions that propose design concepts for the interaction with smart attention management systems. The expected workshop outcome is a summary of emerging challenges in the design and development of smart attention management systems as well as approaches to address them.

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Poster Abstract: SmileWave - Sensing and Analysis of Smile-Based Emotional Contagion over Social Network

Sasaki Wataru, Furukawa Yuki, Nishiyama Yuuki, Okoshi Tadashi, Nakazawa Jin, Tokuda Hideyuki

2016 15th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN) (IEEE) 1 2016.04

Joint Work, Accepted, ISSN 9781509008025

© 2016 IEEE. This paper proposes ''SmileWave, a system for revealing smile-based emotional contagion, propagation effect of the similar emotion through smiley facial expression, on the social network where users interact each other through web-based user interface rather than in-person interaction. SmileWave is a picture-based networking service and detects the change of smile degree when the user looks at posted smile images of others. Our extensive user study with 50 participants for 30 days confirmed the emotional contagion effect on SmileWave. Users' smile degree improved by 27% when the user looked at posted smile images. The result also proved that there is a stronger effect on smile-based emotional contagion when the examinee and the person in the image are in close relationship.

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Proceedings of on MobiSys 2016 PhD Forum

LiKamWa Robert, Okoshi Tadashi, Kang Seungwoo

Publication of MobiSys'16 The 14th Annual International Conference on Mobile Systems, Applications, and Services (ACM) 2016

Joint Work

Poster: NiSleep: Gamification-friendly quantitative evaluation methodology of sleep quality

K Egashira, Y Furukawa, Y Nishiyama, T Okoshi, J Nakazawa, H Tokuda

Proceedings of the 14th Annual International Conference on Mobile Systems … (ACM Press) 132 2016

Joint Work, Accepted, ISSN 9781450344166

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Investigating interruptibility at activity breakpoints using smartphone activity recognition API

M Obuchi, W Sasaki, T Okoshi, J Nakazawa, H Tokuda

Proceedings of the 2016 ACM International Joint Conference on Pervasive and … (ACM Press) 1602 - 1607 2016

Joint Work, Accepted, ISSN 9781450344623

© 2016 ACM. We propose a system for improving the answer rate to ES inquiry to reduce the user's mental burden by detectin breakpoints in user's physical activity and pushing notification in such timings. We conducted an in-The-wild use study with 30 participants for 4-days. The results reveale the effectiveness of breakpoint-based notification delivery In the best case, 70.0% improvement in user's respons time to notifications was observed at a transition to th user's activity from "walking" to "stationary".

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