Estimating Interaction State from Nonverbal Cues and Utterance Events: A Preliminary Study to Support Ideation Facilitation in Living Lab
Ichiro Umata, Sumaru Niida, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 12774 LNCS, 530-537, 2021

Interweaving Data and Knowledge for Co-education Augmentation.
Takuichi Nishimura, Yasuyuki Yoshida, Chiaki Oshiyama, Koki Ijuin, Chisae Murata, Nami Iino, Yuta Tawaki, Yuki Hayashi, Maiko Kobayakawa
IEEE International Conference on Teaching, Assessment, and Learning for Engineering(TALE), 961-964, 2020

Effects of Linguistic Proficiency and Conversation Topic on Listener's Gaze in Triadic Conversation.
Ichiro Umata, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
Social Computing and Social Media. Design, Ethics, User Behavior, and Social Network Analysis - 12th International Conference, 658-668, 2020

Exploring Gaze Behaviour and Perceived Personality Traits.
Koki Ijuin, Kristiina Jokinen
Social Computing and Social Media. Design, Ethics, User Behavior, and Social Network Analysis - 12th International Conference, 504-512, 2020

Quantitative Analyses of Gaze Duration from the viewpoints of Grounding Acts, Conversation Topic, and Linguistic Proficiency.
Ichiro Umata, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
Proceedings of the 42th Annual Meeting of the Cognitive Science Society - Developing a Mind: Learning in Humans, Animals, and Machines(CogSci), -, 2020

Investigation of Method to Structure Worker-based Goal-oriented Knowledge with Action Flowchart and Goal-oriented tree
IJUIN Koki, MAIKO Kobayakawa, SATOSHI Nishimura, TAKUICHI Nishimura
JSAI Technical Report, Type 2 SIG, 2019, SWO-048, 05-, 2019

Utterances in Social Robot Interactions - Correlation Analyses between Robot's Fluency and Participant's Impression.
Koki Ijuin, Kristiina Jokinen
Proceedings of the 7th International Conference on Human-Agent Interaction(HAI), 280-282, 2019

Gaze from and Toward the Silent Third Participant in a Triadic Conversation.
Ichiro Umata, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
Social Computing and Social Media. Communication and Social Communities - 11th International Conference, 68-76, 2019

Floor Apportionment Function of Speaker's Gaze in Grounding Acts.
Ichiro Umata, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
ICMI'19: ADJUNCT OF THE 2019 INTERNATIONAL CONFERENCE ON MULTIMODAL INTERACTION, 13-7, 2019

Difference in Eye Gaze for Floor Apportionment in Native- and Second-Language Conversations
Koki Ijuin, Ichiro Umata, Tsuneo Kato, Seiichi Yamamoto
Journal of Nonverbal Behavior, 42, 1, 113-128, 2018

Floor Apportionment and Mutual Gazes in Native and Second-Language Conversation.
Ichiro Umata, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
Proceedings of the 2018 on International Conference on Multimodal Interaction, ICMI 2018, Boulder, CO, USA, October 16-20, 2018, 334-341, 2018

Gaze during utterances and silence in L1 and L2 Conversations.
Ichiro Umata, Koki Ijuin, Tsuneo Kato, Seiichi Yamamoto
Proceedings of the 39th Annual Meeting of the Cognitive Science Society, CogSci 2017, London, UK, 16-29 July 2017, 34th, -, 2017

Quantitative Analysis of Gazes and Grounding Acts in L1 and L2 Conversations.
Ichiro Umata, Koki Ijuin, Mitsuru Ishida, Moe Takeuchi, Seiichi Yamamoto
Proceedings of the Tenth International Conference on Language Resources and Evaluation LREC 2016, Portorož, Slovenia, May 23-28, 2016., -, 2016

Eye Gaze Analyses in L1 and L2 Conversations: Difference in Interaction Structures.
Koki Ijuin, Yasuhiro Horiuchi, Ichiro Umata, Seiichi Yamamoto
TEXT, SPEECH, AND DIALOGUE (TSD 2015), 9302, 114-121, 2015

Quantitative analyses of Gaze Activity during Silence: Comparison between Native-Language and Second-Language Conversation.
Ichiro Umata, Tomoya Tanizoe, Koki Ijuin, Seiichi Yamamoto
Proceedings of the EuroAsianPacific Joint Conference on Cognitive Science / 4th European Conference on Cognitive Science / 11th International Conference on Cognitive Science, Torino, Italy, September 25-27, 2015., -, 2015

Multimodal corpus of multiparty conversations in L1 and L2 languages and findings obtained from it.
Seiichi Yamamoto, Keiko Taguchi, Koki Ijuin, Ichiro Umata, Masafumi Nishida
Lang. Resour. Evaluation, 49, 4, 857-882, 2015

Multimodal Japanese corpus of multi-party conversation on two different topic types.
Keiko Taguchi, Seiichi Yamamoto, Koki Ijuin, Ichiro Umata
2014 17TH ORIENTAL CHAPTER OF THE INTERNATIONAL COMMITTEE FOR THE CO-ORDINATION AND STANDARDIZATION OF SPEECH DATABASES AND ASSESSMENT TECHNIQUES (COCOSDA), 1-4, 2014

Eye Gaze Analyses in L1 and L2 Conversations: From the Perspective of Listeners' Eye Gaze Activity.
Koki Ijuin, Keiko Taguchi, Ichiro Umata, Seiichi Yamamoto
UM3I 2014 - Proceedings of the 2014 ACM Workshop on Understanding and Modeling Multiparty, Multimodal Interactions, Co-located with ICMI 2014, 33-37, 2014

Effects of language proficiency on eye-gaze in second language conversations: toward supporting second language collaboration.
Ichiro Umata, Seiichi Yamamoto, Koki Ijuin, Masafumi Nishida
ICMI'13: PROCEEDINGS OF THE 2013 ACM INTERNATIONAL CONFERENCE ON MULTIMODAL INTERACTION, 413-420, 2013