Automatic Placement Using Static and Dynamic Groupings. - Makoto Hirahara; Natsuki Oka; Kunio Yoshida (IEA/AIE, 1996)

Associative memory with a sparse encoding mechanism for storing correlated patterns. - Makoto Hirahara; Natsuki Oka; Toshiki Kindo (Neural Networks, 1997)

A cascade associative memory model with a hierarchical memory structure. - Makoto Hirahara; Natsuki Oka; Toshiki Kindo (Neural Networks, 2000)

Cascade associative memory storing hierarchically correlated patterns with various correlations. - Makoto Hirahara; Natsuki Oka; Toshiki Kindo (Neural Networks, 2000)

Toward a mutual adaptive interface by utilizing a user's cognitive features. - Takanori Komatsu; Atsushi Utsunomiya; Kentaro Suzuki; Kazuhiro Ueda; Kazuo Hiraki; Natsuki Oka (CIRA, 2003)

Acceleration of Game Learning with Prediction-Based Reinforcement Learning - Toward the Emergence of Planning Behavior. - Yu Ohigashi; Takashi Omori; Koji Morikawa; Natsuki Oka (ICANN, 2003)

Toward a Mutual Adaptive Interface: An Interface and a User Induce and Utilize the Partner's Adaptation. - Takanori Komatsu; Atsushi Utsunomiya; Kentaro Suzuki; Kazuhiro Ueda; Kazuo Hiraki; Natsuki Oka (KES, 2003)

A Method for Estimating Whether a User is in Smooth Communication with an Interactive Agent in Human-Agent Interaction. - Takanori Komatsu; Shoichiro Ohtsuka; Kazuhiro Ueda; Takashi Komeda; Natsuki Oka (KES, 2004)

A Meaning Acquisition Model Which Induces and Utilizes Human's Adaptation. - Atsushi Utsunomiya; Takanori Komatsu; Kazuhiro Ueda; Natsuki Oka (KES, 2004)

Experiments Toward a Mutual Adaptive Speech Interface That Adopts the Cognitive Features Humans Use for Communication and Induces and Exploits Users' Adaptations. - Takanori Komatsu; Atsushi Utsunomiya; Kentaro Suzuki; Kazuhiro Ueda; Kazuo Hiraki; Natsuki Oka (Int. J. Hum. Comput. Interact., 2005)

A robot that learns in stages utilizing scaffolds: toward an active and long-term human-robot interaction. - Kazuaki Tanaka; Natsuki Oka (Advances in Computer Entertainment Technology, 2008)

The hesitation of a robot: a delay in its motion increases learning efficiency and impresses humans as teachable. - Kazuaki Tanaka; Motoyuki Ozeki; Natsuki Oka (HRI, 2010)

Robot-directed speech detection using Multimodal Semantic Confidence based on speech, image, and motion. - Xiang Zuo; Naoto Iwahashi; Ryo Taguchi; Shigeki Matsuda; Komei Sugiura; Kotaro Funakoshi; Mikio Nakano; Natsuki Oka (ICASSP, 2010)

Detecting robot-directed speech by situated understanding in object manipulation tasks. - Xiang Zuo; Naoto Iwahashi; Ryo Taguchi; Kotaro Funakoshi; Mikio Nakano; Shigeki Matsuda; Komei Sugiura; Natsuki Oka (RO-MAN, 2010)

Correction of phoneme recognition errors in word learning through speech interaction. - Xiang Zuo; Taisuke Sumii; Naoto Iwahashi; Kotaro Funakoshi; Mikio Nakano; Natsuki Oka (SLT, 2010)

Detecting Robot-Directed Speech by Situated Understanding in Physical Interaction. - Xiang Zuo; Naoto Iwahashi; Kotaro Funakoshi; Mikio Nakano; Ryo Taguchi; Shigeki Matsuda; Komei Sugiura; Natsuki Oka (Inf. Media Technol., 2010)

Computational model of the meaning acquisition of sentence-final particles. - Natsuki Oka; Naohiro Nonoguchi; Chie Fukada; Motoyuki Ozeki (CogSci, 2012)

Does Talking to a Robot in a High-Pitched Voice Strengthen an Attachment? - Ryoko Shibata; Takatsugu Kojima; Chie Fukada; Kaori Sato; Yuki Hachikura; Motoyuki Ozeki; Natsuki Oka (CogSci, 2012)

A Computational Model of Imitation and Autonomous Behavior. - Tatsuya Sakato; Motoyuki Ozeki; Natsuki Oka (SNPD, 2012)

Does Talking to a Robot in a High-Pitched Voice Create a Good Impression of the Robot? - Ryoko Shibata; Chie Fukada; Takatsugu Kojima; Kaori Sato; Yuki Hashikura; Motoyuki Ozeki; Natsuki Oka (SNPD, 2012)

Self-Evolving Decision Support Systems in Multi-agent Environment. - Hasanov Tofig; Motoyuki Ozeki; Natsuki Oka (SNPD, 2012)

Concurrent Acquisition of the Meaning of Sentence-Final Particles and Nouns Through Human-Robot Interaction. - Natsuki Oka; Xia Wu; Chie Fukada; Motoyuki Ozeki (ICONIP (1), 2013)

Learning Which Features to Imitate in a Painting Task. - Tatsuya Sakato; Motoyuki Ozeki; Natsuki Oka (IIAI-AAI, 2013)

Correcting phoneme recognition errors in learning word pronunciation through speech interaction. - Xiang Zuo; Taisuke Sumii; Naoto Iwahashi; Mikio Nakano; Kotaro Funakoshi; Natsuki Oka (Speech Commun., 2013)

Toward playmate robots that can play with children considering personality. - Kasumi Abe; Chie Hieida; Muhammad Attamimi; Takayuki Nagai; Takayuki Shimotomai; Takashi Omori; Natsuki Oka (HAI, 2014)

Experimental study of empathy and its behavioral indices in human-robot interaction. - Yuichiro Tsuji; Ami Tsukamoto; Takashi Uchida; Yusuke Hattori; Ryosuke Nishida; Chie Fukada; Motoyuki Ozeki; Takashi Omori; Takayuki Nagai; Natsuki Oka (HAI, 2014)

Learning through Imitation and Reinforcement Learning: Toward the Acquisition of Painting Motions. - Tatsuya Sakato; Motoyuki Ozeki; Natsuki Oka (IIAI-AAI, 2014)

Microcredit risk assessment using crowdsourcing and social networks. - Tofig Hasanov; Motoyuki Ozeki; Natsuki Oka (SNPD, 2014)

Keep Your Chin Up When You Want to Believe in Future Rewards: The Effect of Facial Direction on Discount Factors. - Atsushi Hirota; Shogo Furuhashi; Takashi Uchida; Yusuke Suetsugu; Eri Takashima; Toshimasa Takai; Misa Yoshizaki; Hirofumi Hayakawa; Yukiko Nishizaki; Natsuki Oka (HAI, 2015)

Effect of Embodied Cognition on an Impression of a Robot. - Misa Yoshizaki; Toshimasa Takai; Eri Takashima; Yusuke Suetsugu; Atsushi Hirota; Shogo Furuhashi; Takashi Uchida; Hirofumi Hayakawa; Yukiko Nishizaki; Natsuki Oka (HAI, 2015)

Probabilistic modeling of mental models of others. - Takayuki Nagai; Kasumi Abe; Tomoaki Nakamura; Natsuki Oka; Takashi Omori (RO-MAN, 2015)

The Optimum Rate of Mimicry in Human-Agent Interaction. - Yumiko Shinohara; Katsuhiro Kubo; Momoyo Nozawa; Misa Yoshizaki; Tomomi Takahashi; Hirofumi Hayakawa; Atsushi Hirota; Yukiko Nishizaki; Natsuki Oka (HAI, 2016)

Robust Children Behavior Tracking for Childcare Assisting Robot by Using Multiple Kinect Sensors. - Bin Zhang 036; Tomoaki Nakamura; Rena Ushiogi; Takayuki Nagai; Kasumi Abe; Takashi Omori; Natsuki Oka; Masahide Kaneko (ICSR, 2016)

Classifying Helmeted and Non-helmeted Motorcyclists. - Atsushi Hirota; Nguyen Huy Tiep; Le Van Khanh; Natsuki Oka (ISNN (1), 2017)

Quantitative Analysis and Visualization of Children's Group Behavior from the Perspective of Development of Spontaneity and Sociality. - Jun Ichikawa; Keisuke Fujii 001; Takayuki Nagai; Takashi Omori; Natsuki Oka (CRIWG, 2018)

Scaffolding for a Robot That Learns Reactions to Dialogue Acts. - Akane Matsushima; Natsuki Oka; Yusuke Hattori; Chie Fukada (HAI, 2018)

A Humanoid Robot Can Use Mimicry to Increase Likability and Motivation for Helping. - Yumiko Shinohara; Kazuhiro Mitsukuni; Takayuki Yoneda; Jun Ichikawa; Yukiko Nishizaki; Natsuki Oka (HAI, 2018)

Adaptive Mixed-Initiative Dialog Motivates a Game Player to Talk with an NPC. - Tomomi Takahashi; Kazuaki Tanaka; Natsuki Oka (HAI, 2018)

Sales Talk of a Robot at a Flanking Position Gives Positive Impressions to a Human Customer. - Shoto Fukui; Mia Hamada; Taiki Kusano; Shohei Kodera; Rikimaru Tanigo; Kazuaki Tanaka; Natsuki Oka; Yukiko Nishizaki (HAI, 2019)

Understanding Dialogue Acts by Bayesian Inference and Reinforcement Learning. - Akane Matsushima; Natsuki Oka; Chie Fukada; Kazuaki Tanaka (HAI, 2019)

Analysis of the Influence of Mothers' Traits and Behaviors on Children's Conversational Play with an Utterance-Output Device. - Kazuhiro Mitsukuni; Jun Ichikawa; Yukari Hori; Yuta Ikeno; Leblanc Alexandre; Tetsukazu Kawamoto; Natsuki Oka; Yukiko Nishizaki (HAI, 2019)

Analysis of How Personality Traits Affect Children's Conversational Play with an Utterance-Output Device. - Jun Ichikawa; Kazuhiro Mitsukuni; Yukari Hori; Yuta Ikeno; Leblanc Alexandre; Tetsukazu Kawamoto; Yukiko Nishizaki; Natsuki Oka (ICDL-EPIROB, 2019)

User Behavior Tracking for Education Assisting System by Using an RGB-D Sensor. - Haibin Xia; Bin Zhang 036; Tomoaki Nakamura; Takayuki Nagai; Takashi Omori; Masahide Kaneko; Rena Ushiogi; Natsuki Oka; Hun-ok Lim (ICNC-FSKD, 2019)

Stepwise Acquisition of Dialogue Act Through Human-Robot Interaction. - Akane Matsushima; Ryosuke Kanajiri; Yusuke Hattori; Chie Fukada; Natsuki Oka (IJCNN, 2019)

Prediction of Onset of Lifestyle-Related Diseases Using Regular Health Checkup Data. - Mitsuru Tsunekawa; Natsuki Oka; Masahiro Araki; Motoshi Shintani; Masataka Yoshikawa; Takeshi Tanigawa (JSAI, 2019)

Melodic Emotional Expression Increases Ease of Talking to Spoken Dialog Agents. - Tomomi Takahashi; Kazuaki Tanaka; Kenichiro Kobayashi; Natsuki Oka (HAI, 2021)

Robot Mediated Handholding Combined with a Mobile Video Call Makes the Users Feel Nearer and Closer. - Kazuaki Tanaka; Reo Mayuzumi; Tomomi Takahashi; Sho Takaki; Natsuki Oka (HAI, 2021)

Automatic Utterance Selection Based on Prosodic Features of Children's Vocalizations. - Yuki Kubo; Natsuki Oka; Subaru Hanada; Kazuaki Tanaka; Tomomi Takahashi (JSAI, 2021)

Estimating Children's Intrinsic Motivation During a Class Based on Face Orientation and Gaze Information. - Keisuke Morita; Natsuki Oka; Kazuaki Tanaka; Masahiro Miyata; Takashi Omori (JSAI, 2021)

Construction and Evaluation of a Self-Attention Model for Semantic Understanding of Sentence-Final Particles. - Shuhei Mandokoro; Natsuki Oka; Akane Matsushima; Chie Fukada; Yuko Yoshimura; Koji Kawahara; Kazuaki Tanaka (CoRR, 2022)

Exploring Interest Similarity Features and Their Combinations for Friendship Recommendation Without Cold Start. - Ana Beatriz Pires Quelhas; Natsuki Oka; Kazuaki Tanaka (CollabTech, 2024)