A note on the descriptional complexity of semi-conditional grammars. - Fumiya Okubo (Inf. Process. Lett., 2009)

On the Hairpin Incompletion. - Fumiya Okubo; Takashi Yokomori (Fundam. Informaticae, 2011)

Morphic Characterizations of Language Families in Terms of Insertion Systems and Star Languages. - Fumiya Okubo; Takashi Yokomori (Int. J. Found. Comput. Sci., 2011)

On the Computational Power of Reaction Automata Working in Sequential Manner. - Fumiya Okubo (NCMA, 2012)

Reaction automata. - Fumiya Okubo; Satoshi Kobayashi; Takashi Yokomori (Theor. Comput. Sci., 2012)

On the properties of language classes defined by bounded reaction automata. - Fumiya Okubo; Satoshi Kobayashi; Takashi Yokomori (Theor. Comput. Sci., 2012)

Smart Phone based Data Collecting System for Analyzing Learning Behaviors. - Chengjiu Yin; Fumiya Okubo; Atsushi Shimada 001; Kentaro Kojima; Masanori Yamada; Hiroaki Ogata; Naomi Fujimura (ICCE, 2014)

Reaction automata working in sequential manner. - Fumiya Okubo (RAIRO Theor. Informatics Appl., 2014)

Informal Learning Behavior Analysis Using Action Logs and Slide Features in E-Textbooks. - Atsushi Shimada 001; Fumiya Okubo; Chengjiu Yin; Kentaro Kojima; Masanori Yamada; Hiroaki Ogata (ICALT, 2015)

Preliminary Research on Self-Regulated Learning and Learning Logs in a Ubiquitus Learning Environment. - Masanori Yamada; Chengjiu Yin; Atsushi Shimada 001; Kentaro Kojima; Fumiya Okubo; Hiroaki Ogata (ICALT, 2015)

e-Book-based Learning Analytics in University Education. - Hiroaki Ogata; Chengjiu Yin; Misato Oi; Fumiya Okubo; Atsushi Shimada 001; Kentaro Kojima; Masanori Yamada (ICCE, 2015)

Analysis of Preview and Review Patterns in Undergraduates' E-Book Logs. - Misato Oi; Fumiya Okubo; Atsushi Shimada 001; Chengjiu Yin; Hiroaki Ogata (ICCE, 2015)

Analysis of Links among E-books in Undergraduates' E-Book Logs. - Misato Oi; Chengjiu Yin; Fumiya Okubo; Atsushi Shimada 001; Kentaro Kojima; Masanori Yamada; Hiroaki Ogata (ICCE, 2015)

Visualization and Prediction of Learning Activities by Using Discrete Graphs. - Fumiya Okubo; Atsushi Shimada 001; Chengjiu Yin; Hiroaki Ogata (ICCE, 2015)

Automatic Summarization of Lecture Slides for Enhanced Student Preview. - Atsushi Shimada 001; Fumiya Okubo; Chengjiu Yin; Hiroaki Ogata (ICCE, 2015)

Analysis of Preview Behavior in E-Book System. - Atsushi Shimada 001; Fumiya Okubo; Chengjiu Yin; Misato Oi; Kentaro Kojima; Masanori Yamada; Hiroaki Ogata (ICCE, 2015)

Identifying and Analyzing the Learning Behaviors of Students using e-Books. - Chengjiu Yin; Fumiya Okubo; Atsushi Shimada 001; Misato Oi; Sachio Hirokawa; Hiroaki Ogata (ICCE, 2015)

Analyzing the Features of Learning Behaviors of Students using e-Books. - Chengjiu Yin; Fumiya Okubo; Atsushi Shimada 001; Misato Oi; Sachio Hirokawa; Masanori Yamada; Kentaro Kojima; Hiroaki Ogata (ICCE, 2015)

Finite Automata with Multiset Memory: A New Characterization of Chomsky Hierarchy. - Fumiya Okubo; Takashi Yokomori (Fundam. Informaticae, 2015)

Browsing-Pattern Mining from e-Book Logs with Non-negative Matrix Factorization. - Atsushi Shimada 001; Fumiya Okubo; Hiroaki Ogata (EDM, 2016)

Bayesian Network for Predicting Students' Final Grade Using e-Book Logs in University Education. - Kousuke Mouri; Fumiya Okubo; Atsushi Shimada 001; Hiroaki Ogata (ICALT, 2016)

Learning Analytics in Ubiquitous Learning Environments: Self-Regulated Learning Perspective. - Masanori Yamada; Fumiya Okubo; Misato Oi; Atsushi Shimada 001; Kentaro Kojima; Hiroaki Ogata (ICCE, 2016)

Profiling High-achieving Students for E-book-based Learning Analytics. - Kousuke Mouri; Chengjiu Yin; Fumiya Okubo; Atsushi Shimada 001; Hiroaki Ogata (CrossLAK, 2016)

Learning Activity Features of High Performance Students. - Fumiya Okubo; Sachio Hirokawa; Misato Oi; Chengjiu Yin; Atsushi Shimada 001; Kentaro Kojima; Masanori Yamada; Hiroaki Ogata (CrossLAK, 2016)

Automatic Generation of Personalized Review Materials Based on Across-Learning-System Analysis. - Atsushi Shimada 001; Fumiya Okubo; Chengjiu Yin; Hiroaki Ogata (CrossLAK, 2016)

The computational capability of chemical reaction automata. - Fumiya Okubo; Takashi Yokomori (Nat. Comput., 2016)

Effects of Prior Knowledge of High Achievers on Use of e-Book Highlights and Annotations. - Misato Oi; Fumiya Okubo; Yuta Taniguchi; Masanori Yamada; Shin'ichi Konomi (ICCE, 2017)

Students' Performance Prediction Using Data of Multiple Courses by Recurrent Neural Network. - Fumiya Okubo; Takayoshi Yamashita; Atsushi Shimada 001; Shin'ichi Konomi (ICCE, 2017)

Analysis on Students' Usage of Highlighters on E-textbooks in Classroom. - Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001; Shin'ichi Konomi (ICCE, 2017)

Reproducibility of findings from educational big data: a preliminary study. - Misato Oi; Masanori Yamada; Fumiya Okubo; Atsushi Shimada 001; Hiroaki Ogata (LAK, 2017)

Finding Traces of High and Low Achievers by Analyzing Undergraduates' E-book Logs. - Misato Oi; Masanori Yamada; Fumiya Okubo; Atsushi Shimada 001; Hiroaki Ogata (MMLA-CrossLAK@LAK, 2017)

A neural network approach for students' performance prediction. - Fumiya Okubo; Takayoshi Yamashita; Atsushi Shimada 001; Hiroaki Ogata (LAK, 2017)

Morphic Characterizations of Language Families Based on Local and Star Languages. - Fumiya Okubo; Takashi Yokomori (Fundam. Informaticae, 2017)

Learning analytics of the relationships among self-regulated learning, learning behaviors, and learning performance. - Masanori Yamada; Atsushi Shimada 001; Fumiya Okubo; Misato Oi; Kentaro Kojima; Hiroaki Ogata (Res. Pract. Technol. Enhanc. Learn., 2017)

The Computing Power of Determinism and Reversibility in Chemical Reaction Automata. - Fumiya Okubo; Takashi Yokomori (Reversibility and Universality, 2018)

Computing with Multisets: A Survey on Reaction Automata Theory. - Takashi Yokomori; Fumiya Okubo (CiE, 2018)

Towards Supporting Multigenerational Co-creation and Social Activities: Extending Learning Analytics Platforms and Beyond. - Shin'ichi Konomi; Kohei Hatano; Miyuki Inaba; Misato Oi; Tsuyoshi Okamoto; Fumiya Okubo; Atsushi Shimada 001; Jingyun Wang; Masanori Yamada; Yuki Yamada (HCI (22), 2018)

On the Prediction of Students' Quiz Score by Recurrent Neural Network. - Fumiya Okubo; Takayoshi Yamashita; Atsushi Shimada 001; Yuta Taniguchi; Shin'ichi Konomi (CrossMMLA@LAK, 2018)

Online change detection for monitoring individual student behavior via clickstream data on E-book system. - Atsushi Shimada 001; Yuta Taniguchi; Fumiya Okubo; Shin'ichi Konomi; Hiroaki Ogata (LAK, 2018)

Relationships between Collaborative Problem Solving, Learning Performance and Learning Behavior in Science Education. - Li Chen 032; Hirokazu Uemura; Hao Hao; Yoshiko Goda; Fumiya Okubo; Yuta Taniguchi; Misato Oi; Shin'ichi Konomi; Hiroaki Ogata; Masanori Yamada (TALE, 2018)

Automatic Summarization of Lecture Slides for Enhanced Student Preview-Technical Report and User Study-. - Atsushi Shimada 001; Fumiya Okubo; Chengjiu Yin; Hiroaki Ogata (IEEE Trans. Learn. Technol., 2018)

Integrating Multimodal Learning Analytics and Inclusive Learning Support Systems for People of All Ages. - Kaori Tamura; Min Lu 003; Shin'ichi Konomi; Kohei Hatano; Miyuki Inaba; Misato Oi; Tsuyoshi Okamoto; Fumiya Okubo; Atsushi Shimada 001; Jingyun Wang; Masanori Yamada; Yuki Yamada (HCI (12), 2019)

E-book Learner Behaviors Difference under two Meaningful Learning Support Environments. - Jingyun Wang; Atsushi Shimada 001; Fumiya Okubo (ICCE, 2019)

Exploring the Relationships between Reading Behavior Patterns and Learning Outcomes Based on Log Data from E-Books: A Human Factor Approach. - Chengjiu Yin; Masanori Yamada; Misato Oi; Atsushi Shimada 001; Fumiya Okubo; Kentaro Kojima; Hiroaki Ogata (Int. J. Hum. Comput. Interact., 2019)

Direction of collaborative problem solving-based STEM learning by learning analytics approach. - Li Chen 032; Nobuyuki Yoshimatsu; Yoshiko Goda; Fumiya Okubo; Yuta Taniguchi; Misato Oi; Shin'ichi Konomi; Atsushi Shimada 001; Hiroaki Ogata; Masanori Yamada (Res. Pract. Technol. Enhanc. Learn., 2019)

Decomposition and factorization of chemical reaction transducers. - Fumiya Okubo; Takashi Yokomori (Theor. Comput. Sci., 2019)

Exploring Factors that Influence Collaborative Problem Solving Awareness in Science Education. - Li Chen 032; Koichi Inoue; Yoshiko Goda; Fumiya Okubo; Yuta Taniguchi; Misato Oi; Shin'ichi Konomi; Hiroaki Ogata; Masanori Yamada (Technol. Knowl. Learn., 2020)

Theory of reaction automata: a survey. - Takashi Yokomori; Fumiya Okubo (J. Membr. Comput., 2021)

On the computing powers of L-reductions of insertion languages. - Fumiya Okubo; Takashi Yokomori (Theor. Comput. Sci., 2021)

Background Subtraction Network Module Ensemble for Background Scene Adaptation. - Taiki Hamada; Tsubasa Minematsu; Atsushi Shimada 001; Fumiya Okubo; Yuta Taniguchi (AVSS, 2022)

Detection of At-Risk Studentsin Programming Courses. - Ikkei Igawa; Yuta Taniguchi; Tsubasa Minematsu; Fumiya Okubo; Atsushi Shimada 001 (ICCE, 2022)

Topic-Based Representation of Learning Activities for New Learning Pattern Analytics. - Jinghao Wang; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (ICCE, 2022)

Assessment of At-Risk Students' Predictions From E-Book Activities Representations In Practical Applications. - Erwin D. López Z.; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (ICCE, 2022)

Predicting Student Performance based on Lecture Materials Data using Neural Network Models. - Sukrit Leelaluk; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (LAK (Data Challenge), 2022)

How Does Analysis of Handwritten Notes Provide Better Insights for Learning Behavior? - Boyi Li; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (LAK, 2022)

Exploring the Use of Probabilistic Latent Representations to Encode the Students' Reading Characteristics. - Erwin D. López Z.; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (LAK (Data Challenge), 2022)

Scaled-Dot Product Attention for Early Detection of At-risk Students. - Sukrit Leelaluk; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Takayoshi Yamashita; Atsushi Shimada 001 (TALE, 2022)

A System to Realize Time- and Location-Independent Teaching and Learning Among Learners Through Sharing Learning-Articles. - Seiyu Okai; Tsubasa Minematsu; Fumiya Okubo; Yuta Taniguchi; Hideaki Uchiyama; Atsushi Shimada 001 (WCCE, 2022)

Development and Evaluation of a Field Environment Digest System for Agricultural Education. - Kanu Shiga; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001; Rin-Ichiro Taniguchi (WCCE, 2022)

ℒ-reduction computation revisited. - Kaoru Fujioka; Fumiya Okubo; Takashi Yokomori (Acta Informatica, 2022)

Chemical Reaction Regular Grammars. - Fumiya Okubo; Kaoru Fujioka; Takashi Yokomori (New Gener. Comput., 2022)

Corrigendum to "On the computing powers of L-reductions of insertion languages" [Theor. Comput. Sci. 862 (2021) 224-235]. - Fumiya Okubo; Takashi Yokomori (Theor. Comput. Sci., 2022)

LECTOR: An attention-based model to quantify e-book lecture slides and topics relationships. - Erwin D. López Z.; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (EDM, 2023)

Investigating Programming Performance Predictability from Embedding Vectors of Coding Behaviors. - Ikkei Igawa; Yuta Taniguchi; Tsubasa Minematsu; Fumiya Okubo; Atsushi Shimada 001 (ICCE, 2023)

Adaptive Learning Support System Based on Automatic Recommendation of Personalized Review Materials. - Fumiya Okubo; Tetsuya Shiino; Tsubasa Minematsu; Yuta Taniguchi; Atsushi Shimada 001 (IEEE Trans. Learn. Technol., 2023)

How Do Strategies for Using ChatGPT Affect Knowledge Comprehension? - Li Chen 032; Gen Li; Boxuan Ma; Cheng Tang 001; Fumiya Okubo; Atsushi Shimada 001 (AIED Companion (1), 2024)

Comparison of Large Language Models for Generating Contextually Relevant Questions. - Ivo Lodovico Molina; Valdemar Svábenský; Tsubasa Minematsu; Li Chen 032; Fumiya Okubo; Atsushi Shimada 001 (EC-TEL (2), 2024)

QA-Knowledge Attention for Exam Performance Prediction. - Yongle Ren; Cheng Tang 001; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (EC-TEL (1), 2024)

E2Vec: Feature Embedding with Temporal Information for Analyzing Student Actions in E-Book Systems. - Yuma Miyazaki; Valdemar Svábenský; Yuta Taniguchi; Fumiya Okubo; Tsubasa Minematsu; Atsushi Shimada 001 (EDM, 2024)

Automated Recommendations for Revising Lecture Slides Using Reading Activity Data. - Erwin D. López Z.; Cheng Tang 001; Yuta Taniguchi; Fumiya Okubo; Atsushi Shimada 001 (ICCE, 2024)

Visual Analytics of Learning Behavior Based on the Dendritic Neuron Model. - Cheng Tang 001; Li Chen 032; Gen Li; Tsubasa Minematsu; Fumiya Okubo; Yuta Taniguchi; Atsushi Shimada 001 (KSEM (2), 2024)

Educational Data Analysis using Generative AI. - Abdul Berr; Sukrit Leelaluk; Cheng Tang 001; Li Chen 032; Fumiya Okubo; Atsushi Shimada 001 (LAK Workshops, 2024)

Educational Data Analysis using Generative AI. - Shuaileng Yuan; Sukrit Leelaluk; Cheng Tang 001; Li Chen 032; Fumiya Okubo; Atsushi Shimada 001 (LAK Workshops, 2024)

Attention-Based Artificial Neural Network for Student Performance Prediction Based on Learning Activities. - Sukrit Leelaluk; Cheng Tang 001; Tsubasa Minematsu; Yuta Taniguchi; Fumiya Okubo; Takayoshi Yamashita; Atsushi Shimada 001 (IEEE Access, 2024)

Attention Mamba: Time Series Modeling with Adaptive Pooling Acceleration and Receptive Field Enhancements. - Sijie Xiong; Shuqing Liu; Cheng Tang 001; Fumiya Okubo; Haoling Xiong; Atsushi Shimada 001 (CoRR, 2025)

LECTOR: Summarizing E-book Reading Content for Personalized Student Support. - Erwin Daniel López Zapata; Cheng Tang 001; Valdemar Svábenský; Fumiya Okubo; Atsushi Shimada 001 (CoRR, 2025)

PALM: PAnoramic Learning Map Integrating Learning Analytics and Curriculum Map for Scalable Insights Across Courses. - Mahiro Ozaki; Li Chen 032; Shotaro Naganuma; Valdemar Svábenský; Fumiya Okubo; Atsushi Shimada 001 (CoRR, 2025)