Kouzou Ohara

According to our database, Kouzou Ohara authored at least 93 papers between 1996 and 2024.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2024

Generating Achievement Relationship Graph Between Actions for Alternative Solution Recommendation.

Tsukasa Hirano, Yoshiyuki Shoji, Takehiro Yamamoto, Kouzou Ohara

Proceedings of the Database Systems for Advanced Applications. DASFAA 2024 International Workshops, 2024

2023

Digital Index Card Creation and Management for Memorizing What You See on the Web.

Yuna Saka, Yoshiyuki Shoji, Hiroaki Ohshima, Kouzou Ohara

Proceedings of the Information Integration and Web Intelligence, 2023

2022

Learning and Transforming General Representations to Break Down Stability-Plasticity Dilemma.

Kengo Murata, Seiya Ito, Kouzou Ohara

Proceedings of the Computer Vision - ACCV 2022, 2022

2021

General framework of opening and closing shops over a spatial network based on stochastic utility under competitive and time-bounded environment.

Takayasu Fushimi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Soc. Netw. Anal. Min., 2021

Efficient computation of target-oriented link criticalness centrality in uncertain graphs.

Kazumi Saito, Takayasu Fushimi, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Intell. Data Anal., 2021

2020

Resampling-based predictive simulation framework of stochastic diffusion model for identifying top-K influential nodes.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Int. J. Data Sci. Anal., 2020

Maximizing Network Coverage Under the Presence of Time Constraint by Injecting Most Effective k-Links.

Kouzou Ohara, Takayasu Fushimi, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Discovery Science - 23rd International Conference, 2020

What is Happening Inside a Continual Learning Model? - A Representation-Based Evaluation of Representational Forgetting -.

Kengo Murata, Tetsuya Toyota, Kouzou Ohara

Proceedings of the 2020 IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2020

Efficient Computing of PageRank Scores on Exact Expected Transition Matrix of Large Uncertain Graph.

Takayasu Fushimi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the 2020 IEEE International Conference on Big Data (IEEE BigData 2020), 2020

Opening and Closing Dynamics of Competing Shop Groups over Spatial Networks.

Takayasu Fushimi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, 2020

2019

Renewal of the Major Fields from New Generation Computing Vol. 37 (2019).

Masayuki Numao, Yutaka Matsuo, Kouzou Ohara, Fujio Toriumi

New Gener. Comput., 2019

Critical Node Identification based on Articulation Point Detection for Uncertain Network.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Int. J. Netw. Comput., 2019

Efficient Identification of Critical Links Based on Reachability Under the Presence of Time Constraint.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the PRICAI 2019: Trends in Artificial Intelligence, 2019

Constructing Dataset Based on Concept Hierarchy for Evaluating Word Vectors Learned from Multisense Words.

Tomoaki Yamazaki, Tetsuya Toyota, Kouzou Ohara

Proceedings of the Knowledge Management and Acquisition for Intelligent Systems, 2019

Resampling-Based Framework for Unbiased Estimator of Node Centrality over Large Complex Network.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Discovery Science - 22nd International Conference, 2019

2018

Accurate and efficient detection of critical links in network to minimize information loss.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

J. Intell. Inf. Syst., 2018

Which is more influential, "Who" or "When" for a user to rate in online review site?

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Intell. Data Anal., 2018

Sample Reuse via Importance Sampling in Information Geometric Optimization.

Shinichi Shirakawa, Youhei Akimoto, Kazuki Ouchi, Kouzou Ohara

CoRR, 2018

Efficient Detection of Critical Links to Maintain Performance of Network with Uncertain Connectivity.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the PRICAI 2018: Trends in Artificial Intelligence, 2018

k-NN Based Forecast of Short-Term Foreign Exchange Rates.

Haruya Umemoto, Tetsuya Toyota, Kouzou Ohara

Proceedings of the Knowledge Management and Acquisition for Intelligent Systems, 2018

Critical Link Identification Based on Bridge Detection for Network with Uncertain Connectivity.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Foundations of Intelligent Systems - 24th International Symposium, 2018

Critical Node Identification Based on Articulation Point Detection for Network with Uncertain Connectivity.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Sixth International Symposium on Computing and Networking, 2018

2017

An Accurate and Efficient Method to Detect Critical Links to Maintain Information Flow in Network.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Foundations of Intelligent Systems - 23rd International Symposium, 2017

Discovering Cooperative Structure Among Online Items for Attention Dynamics.

Kanji Matsutani, Masahito Kumano, Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the 2017 IEEE International Conference on Data Mining Workshops, 2017

Maximizing Network Performance Based on Group Centrality by Creating Most Effective k-Links.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the 2017 IEEE International Conference on Data Science and Advanced Analytics, 2017

2016

Super mediator - A new centrality measure of node importance for information diffusion over social network.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Inf. Sci., 2016

Speeding-up node influence computation for huge social networks.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Int. J. Data Sci. Anal., 2016

Detecting Critical Links in Complex Network to Maintain Information Flow/Reachability.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the PRICAI 2016: Trends in Artificial Intelligence, 2016

Accelerating Computation of Distance Based Centrality Measures for Spatial Networks.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Discovery Science - 19th International Conference, 2016

2015

Change point detection for burst analysis from an observed information diffusion sequence of tweets.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

J. Intell. Inf. Syst., 2015

Efficient Learning of User Conformity on Review Score.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Social Computing, Behavioral-Cultural Modeling, and Prediction, 2015

Resampling-Based Gap Analysis for Detecting Nodes with High Centrality on Large Social Network.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Advances in Knowledge Discovery and Data Mining, 2015

The Effect of Metaphoric Gestures on Schematic Understanding of Instruction Performed by a Pedagogical Conversational Agent.

Dai Hasegawa, Shinichi Shirakawa, Naoya Shioiri, Toshiki Hanawa, Hiroshi Sakuta, Kouzou Ohara

Proceedings of the Learning and Collaboration Technologies, 2015

Sample Reuse in the Covariance Matrix Adaptation Evolution Strategy Based on Importance Sampling.

Shinichi Shirakawa, Youhei Akimoto, Kazuki Ouchi, Kouzou Ohara

Proceedings of the Genetic and Evolutionary Computation Conference, 2015

Change Point Detection for Information Diffusion Tree.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Discovery Science - 18th International Conference, 2015

Combining activity-evaluation information with NMF for trust-link prediction in social media.

Kanji Matsutani, Masahito Kumano, Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the 2015 IEEE International Conference on Big Data (IEEE BigData 2015), Santa Clara, CA, USA, October 29, 2015

2014

A New Approach for Item Ranking Based on Review Scores Reflecting Temporal Trust Factor.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Social Computing, Behavioral-Cultural Modeling and Prediction, 2014

A Method to Divide Stream Data of Scores over Review Sites.

Yuki Yamagishi, Seiya Okubo, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the PRICAI 2014: Trends in Artificial Intelligence, 2014

Analyzing Mediator-Activity Effects for Trust-Network Evolution in Social Media.

Keito Hatta, Masahito Kumano, Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the PRICAI 2014: Trends in Artificial Intelligence, 2014

Efficient analysis of node influence based on SIR model over huge complex networks.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the International Conference on Data Science and Advanced Analytics, 2014

Resampling-Based Framework for Estimating Node Centrality of Large Social Network.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Discovery Science - 17th International Conference, 2014

2013

Detecting changes in information diffusion patterns over social networks.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

ACM Trans. Intell. Syst. Technol., 2013

Learning to predict opinion share and detect anti-majority opinionists in social networks.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

J. Intell. Inf. Syst., 2013

Which Targets to Contact First to Maximize Influence over Social Network.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Social Computing, Behavioral-Cultural Modeling and Prediction, 2013

Identifying Super-Mediators of Information Diffusion in Social Networks.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Discovery Science - 16th International Conference, 2013

Detecting changes in content and posting time distributions in social media.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Advances in Social Networks Analysis and Mining 2013, 2013

Predictive Simulation Framework of Stochastic Diffusion Model for Identifying Top-K Influential Nodes.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Asian Conference on Machine Learning, 2013

2012

Efficient discovery of influential nodes for SIS models in social networks.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Knowl. Inf. Syst., 2012

Learning Asynchronous-Time Information Diffusion Models and its Application to Behavioral Data Analysis over Social Networks

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

CoRR, 2012

Graph embedding on spheres and its application to visualization of information diffusion data.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the 21st World Wide Web Conference, 2012

Effect of In/Out-Degree Correlation on Influence Degree of Two Contrasting Information Diffusion Models.

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Social Computing, Behavioral - Cultural Modeling and Prediction, 2012

Opinion Formation by Voter Model with Temporal Decay Dynamics.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2012

Burst Detection in a Sequence of Tweets Based on Information Diffusion Model.

Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Discovery Science - 15th International Conference, 2012

2011

Learning Attribute-weighted Voter Model over Social Networks.

Yuki Yamagishi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the 3rd Asian Conference on Machine Learning, 2011

Estimating Diffusion Probability Changes for AsIC-SIS Model.

Akihiro Koide, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda

Proceedings of the 3rd Asian Conference on Machine Learning, 2011

Learning information diffusion model in a social network for predicting influence of nodes.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Intell. Data Anal., 2011

Efficient Detection of Hot Span in Information Diffusion from Observation

Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda

CoRR, 2011

Detecting Changes in Opinion Value Distribution for Voter Model.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Social Computing, Behavioral-Cultural Modeling and Prediction, 2011

Learning Diffusion Probability Based on Node Attributes in Social Networks.

Kazumi Saito, Kouzou Ohara, Yuki Yamagishi, Masahiro Kimura, Hiroshi Motoda

Proceedings of the Foundations of Intelligent Systems - 19th International Symposium, 2011

Detecting Anti-majority Opinionists Using Value-Weighted Mixture Voter Model.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Discovery Science - 14th International Conference, 2011

Speeding Up Bipartite Graph Visualization Method.

Takayasu Fushimi, Yamato Kubota, Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the AI 2011: Advances in Artificial Intelligence, 2011

2010

Generative Models of Information Diffusion with Asynchronous Timedelay.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the 2nd Asian Conference on Machine Learning, 2010

Behavioral Analyses of Information Diffusion Models by Observed Data of Social Network.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Advances in Social Computing, 2010

Efficient Estimation of Cumulative Influence for Multiple Activation Information Diffusion Model with Continuous Time Delay.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the PRICAI 2010: Trends in Artificial Intelligence, 2010

Selecting Information Diffusion Models over Social Networks for Behavioral Analysis.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Machine Learning and Knowledge Discovery in Databases, 2010

Acquiring Expected Influence Curve from Single Diffusion Sequence.

Yuya Yoshikawa, Kazumi Saito, Hiroshi Motoda, Kouzou Ohara, Masahiro Kimura

Proceedings of the Knowledge Management and Acquisition for Smart Systems and Services, 2010

Finding Relation between PageRank and Voter Model.

Takayasu Fushimi, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda, Kouzou Ohara

Proceedings of the Knowledge Management and Acquisition for Smart Systems and Services, 2010

Discovery of Super-Mediators of Information Diffusion in Social Networks.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Discovery Science - 13th International Conference, 2010

Recommendation of Little Known Good Travel Destinations Using Word-of-Mouth Information on the Web.

Kouzou Ohara, Yu Fujimoto, Tomofumi Shiina

Proceedings of the Active Media Technology, 6th International Conference, 2010

Learning to Predict Opinion Share in Social Networks.

Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Twenty-Fourth AAAI Conference on Artificial Intelligence, 2010

2009

Learning Continuous-Time Information Diffusion Model for Social Behavioral Data Analysis.

Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Advances in Machine Learning, 2009

2008

DryadeParent, An Efficient and Robust Closed Attribute Tree Mining Algorithm.

Alexandre Termier, Marie-Christine Rousset, Michèle Sebag, Kouzou Ohara, Takashi Washio, Hiroshi Motoda

IEEE Trans. Knowl. Data Eng., 2008

Pruning Strategies Based on the Upper Bound of Information Gain for Discriminative Subgraph Mining.

Kouzou Ohara, Masahiro Hara, Kiyoto Takabayashi, Hiroshi Motoda, Takashi Washio

Proceedings of the Knowledge Acquisition: Approaches, 2008

2007

Learning Personal Preference From Viewer's Operations for Browsing and Its Application to Baseball Video Retrieval and Summarization.

Noboru Babaguchi, Kouzou Ohara, Takehiro Ogura

IEEE Trans. Multim., 2007

2006

Extracting Discriminative Patterns from Graph Structured Data Using Constrained Search.

Kiyoto Takabayashi, Phu Chien Nguyen, Kouzou Ohara, Hiroshi Motoda, Takashi Washio

Proceedings of the Advances in Knowledge Acquisition and Management, 2006

Constructing Decision Trees for Graph-Structured Data by Chunkingless Graph-Based Induction.

Phu Chien Nguyen, Kouzou Ohara, Akira Mogi, Hiroshi Motoda, Takashi Washio

Proceedings of the Advances in Knowledge Discovery and Data Mining, 2006

2005

Constructing a Decision Tree for Graph-Structured Data and its Applications.

Warodom Geamsakul, Tetsuya Yoshida, Kouzou Ohara, Hiroshi Motoda, Hideto Yokoi, Katsuhiko Takabayashi

Fundam. Informaticae, 2005

Cl-GBI: A Novel Approach for Extracting Typical Patterns from Graph-Structured Data.

Phu Chien Nguyen, Kouzou Ohara, Hiroshi Motoda, Takashi Washio

Proceedings of the Advances in Knowledge Discovery and Data Mining, 2005

Efficient Mining of High Branching Factor Attribute Trees.

Alexandre Termier, Marie-Christine Rousset, Michèle Sebag, Kouzou Ohara, Takashi Washio, Hiroshi Motoda

Proceedings of the 5th IEEE International Conference on Data Mining (ICDM 2005), 2005

Refining diagnostic knowledge extracted from interferon therapy by graph-based induction.

Tetsuya Yoshida, Akira Mogi, Kouzou Ohara, Hiroshi Motoda, Takashi Washio

Proceedings of the 2005 International Conference on Active Media Technology, 2005

2004

Using a Hash-Based Method for Apriori-Based Graph Mining.

Phu Chien Nguyen, Takashi Washio, Kouzou Ohara, Hiroshi Motoda

Proceedings of the Knowledge Discovery in Databases: PKDD 2004, 2004

Analysis of Hepatitis Dataset by Decision Tree Based on Graph-Based Induction.

Warodom Geamsakul, Takashi Matsuda, Tetsuya Yoshida, Kouzou Ohara, Hiroshi Motoda, Takashi Washio, Hideto Yokoi, Katsuhiko Takabayashi

Proceedings of the New Frontiers in Artificial Intelligence - JSAI 2003 and JSAI 2004 Conferences and Workshops, Niigata, Japan, June 23-27, 2003 and Kanazawa, Japan, May 31, 2004

Constructive Inductive Learning Based on Meta-attributes.

Kouzou Ohara, Yukio Onishi, Noboru Babaguchi, Hiroshi Motoda

Proceedings of the Discovery Science, 7th International Conference, 2004

2003

On Personalizing Video Portal System with Metadata.

Kouzou Ohara, Takehiro Ogura, Noboru Babaguchi

Proceedings of the Knowledge-Based Intelligent Information and Engineering Systems, 2003

Extracting Diagnostic Knowledge from Hepatitis Dataset by Decision Tree Graph-Based Induction.

Warodom Geamsakul, Tetsuya Yoshida, Kouzou Ohara, Hiroshi Motoda, Takashi Washio, Hideto Yokoi, Katsuhiko Takabayashi

Proceedings of the Active Mining, Second International Workshop, 2003

2000

Determination of General Concept in Learning Default Rules.

Kouzou Ohara, Hideyuki Taka, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the PRICAI 2000, Topics in Artificial Intelligence, 6th Pacific Rim International Conference on Artificial Intelligence, Melbourne, Australia, August 28, 2000

An Efficient Hypothesis Search Algorithm Based on Best-Bound Search.

Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the Inductive Logic Programming, 10th International Conference, 2000

On Operations for Reconstructing the Complete/Incomplete Knowledge.

Kouichi Katsurada, Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the Information Modelling and Knowledge Bases XII: Tenth European-Japanese Conference on Information Modelling and Knowledge Bases, 2000

Converting Ordinary Rules into Default Rules Based on Contradiction of Knowledge Base.

Kouichi Katsurada, Makoto Koyama, Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the Information Modelling and Knowledge Bases XII: Tenth European-Japanese Conference on Information Modelling and Knowledge Bases, 2000

1998

Non-monotonic inference system handling knowledge allowing classified exceptions.

Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the IEEE International Conference on Systems, Man and Cybernetics, 1998

Solving contradiction in knowledge-base without interaction.

Kouichi Katsurada, Makoto Koyama, Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the IEEE International Conference on Systems, Man and Cybernetics, 1998

1996

On Formation of Exception Hierarchy.

Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the PRICAI'96: Topics in Artificial Intelligence, 1996

A Query Procedure for Allowing Exceptions in Advanced Logical Database.

Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi

Proceedings of the Industrial and Engineering Applications of Artificial Intelligence and Expert Systems, 1996