Kouzou Ohara

Publication Activity (10 Years)

Years Active: 1996-2023
Publications (10 Years): 35

Top Topics

Centrality Measures

Transition Matrix

Information Diffusion

Social Networks

Top Venues

Discovery Science

Publications

Yuna Saka, Yoshiyuki Shoji, Hiroaki Ohshima, Kouzou Ohara
Digital Index Card Creation and Management for Memorizing What You See on the Web. iiWAS (2023)
Kengo Murata, Seiya Ito, Kouzou Ohara
Learning and Transforming General Representations to Break Down Stability-Plasticity Dilemma. ACCV (6) (2022)
Kazumi Saito, Takayasu Fushimi, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Efficient computation of target-oriented link criticalness centrality in uncertain graphs. Intell. Data Anal. 25 (5) (2021)
Takayasu Fushimi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
General framework of opening and closing shops over a spatial network based on stochastic utility under competitive and time-bounded environment. Soc. Netw. Anal. Min. 11 (1) (2021)
Kouzou Ohara, Takayasu Fushimi, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Maximizing Network Coverage Under the Presence of Time Constraint by Injecting Most Effective k-Links. DS (2020)
Kengo Murata, Tetsuya Toyota, Kouzou Ohara
What is Happening Inside a Continual Learning Model? - A Representation-Based Evaluation of Representational Forgetting -. CVPR Workshops (2020)
Takayasu Fushimi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Opening and Closing Dynamics of Competing Shop Groups over Spatial Networks. ASONAM (2020)
Takayasu Fushimi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Efficient Computing of PageRank Scores on Exact Expected Transition Matrix of Large Uncertain Graph. IEEE BigData (2020)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Resampling-based predictive simulation framework of stochastic diffusion model for identifying top-K influential nodes. Int. J. Data Sci. Anal. 9 (2) (2020)
Masayuki Numao, Yutaka Matsuo, Kouzou Ohara, Fujio Toriumi
Renewal of the Major Fields from New Generation Computing Vol. 37 (2019). New Gener. Comput. 37 (1) (2019)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Resampling-Based Framework for Unbiased Estimator of Node Centrality over Large Complex Network. DS (2019)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Critical Node Identification based on Articulation Point Detection for Uncertain Network. Int. J. Netw. Comput. 9 (2) (2019)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Efficient Identification of Critical Links Based on Reachability Under the Presence of Time Constraint. PRICAI (2) (2019)
Tomoaki Yamazaki, Tetsuya Toyota, Kouzou Ohara
Constructing Dataset Based on Concept Hierarchy for Evaluating Word Vectors Learned from Multisense Words. PKAW (2019)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Critical Link Identification Based on Bridge Detection for Network with Uncertain Connectivity. ISMIS (2018)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Efficient Detection of Critical Links to Maintain Performance of Network with Uncertain Connectivity. PRICAI (1) (2018)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Critical Node Identification Based on Articulation Point Detection for Network with Uncertain Connectivity. CANDAR (2018)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Accurate and efficient detection of critical links in network to minimize information loss. J. Intell. Inf. Syst. 51 (2) (2018)
Haruya Umemoto, Tetsuya Toyota, Kouzou Ohara
k-NN Based Forecast of Short-Term Foreign Exchange Rates. PKAW (2018)
Shinichi Shirakawa, Youhei Akimoto, Kazuki Ouchi, Kouzou Ohara
Sample Reuse via Importance Sampling in Information Geometric Optimization. CoRR (2018)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Which is more influential, "Who" or "When" for a user to rate in online review site? Intell. Data Anal. 22 (3) (2018)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
An Accurate and Efficient Method to Detect Critical Links to Maintain Information Flow in Network. ISMIS (2017)
Kanji Matsutani, Masahito Kumano, Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Discovering Cooperative Structure Among Online Items for Attention Dynamics. ICDM Workshops (2017)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Maximizing Network Performance Based on Group Centrality by Creating Most Effective k-Links. DSAA (2017)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Detecting Critical Links in Complex Network to Maintain Information Flow/Reachability. PRICAI (2016)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Super mediator - A new centrality measure of node importance for information diffusion over social network. Inf. Sci. 329 (2016)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Speeding-up node influence computation for huge social networks. Int. J. Data Sci. Anal. 1 (1) (2016)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Accelerating Computation of Distance Based Centrality Measures for Spatial Networks. DS (2016)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Resampling-Based Gap Analysis for Detecting Nodes with High Centrality on Large Social Network. PAKDD (1) (2015)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Efficient Learning of User Conformity on Review Score. SBP (2015)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Change Point Detection for Information Diffusion Tree. Discovery Science (2015)
Shinichi Shirakawa, Youhei Akimoto, Kazuki Ouchi, Kouzou Ohara
Sample Reuse in the Covariance Matrix Adaptation Evolution Strategy Based on Importance Sampling. GECCO (2015)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Change point detection for burst analysis from an observed information diffusion sequence of tweets. J. Intell. Inf. Syst. 44 (2) (2015)
Dai Hasegawa, Shinichi Shirakawa, Naoya Shioiri, Toshiki Hanawa, Hiroshi Sakuta, Kouzou Ohara
The Effect of Metaphoric Gestures on Schematic Understanding of Instruction Performed by a Pedagogical Conversational Agent. HCI (24) (2015)
Kanji Matsutani, Masahito Kumano, Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Combining activity-evaluation information with NMF for trust-link prediction in social media. IEEE BigData (2015)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
A New Approach for Item Ranking Based on Review Scores Reflecting Temporal Trust Factor. SBP (2014)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Resampling-Based Framework for Estimating Node Centrality of Large Social Network. Discovery Science (2014)
Keito Hatta, Masahito Kumano, Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Analyzing Mediator-Activity Effects for Trust-Network Evolution in Social Media. PRICAI (2014)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Efficient analysis of node influence based on SIR model over huge complex networks. DSAA (2014)
Yuki Yamagishi, Seiya Okubo, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
A Method to Divide Stream Data of Scores over Review Sites. PRICAI (2014)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Predictive Simulation Framework of Stochastic Diffusion Model for Identifying Top-K Influential Nodes. ACML (2013)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Learning to predict opinion share and detect anti-majority opinionists in social networks. J. Intell. Inf. Syst. 41 (1) (2013)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Detecting changes in content and posting time distributions in social media. ASONAM (2013)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Identifying Super-Mediators of Information Diffusion in Social Networks. Discovery Science (2013)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Which Targets to Contact First to Maximize Influence over Social Network. SBP (2013)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Detecting changes in information diffusion patterns over social networks. ACM Trans. Intell. Syst. Technol. 4 (3) (2013)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Effect of In/Out-Degree Correlation on Influence Degree of Two Contrasting Information Diffusion Models. SBP (2012)
Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Burst Detection in a Sequence of Tweets Based on Information Diffusion Model. Discovery Science (2012)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Efficient discovery of influential nodes for SIS models in social networks. Knowl. Inf. Syst. 30 (3) (2012)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Learning Asynchronous-Time Information Diffusion Models and its Application to Behavioral Data Analysis over Social Networks CoRR (2012)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Graph embedding on spheres and its application to visualization of information diffusion data. WWW (Companion Volume) (2012)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Opinion Formation by Voter Model with Temporal Decay Dynamics. ECML/PKDD (2) (2012)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Detecting Changes in Opinion Value Distribution for Voter Model. SBP (2011)
Kazumi Saito, Kouzou Ohara, Yuki Yamagishi, Masahiro Kimura, Hiroshi Motoda
Learning Diffusion Probability Based on Node Attributes in Social Networks. ISMIS (2011)
Akihiro Koide, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Estimating Diffusion Probability Changes for AsIC-SIS Model. ACML (2011)
Takayasu Fushimi, Yamato Kubota, Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Speeding Up Bipartite Graph Visualization Method. Australasian Conference on Artificial Intelligence (2011)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Detecting Anti-majority Opinionists Using Value-Weighted Mixture Voter Model. Discovery Science (2011)
Kouzou Ohara, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda
Efficient Detection of Hot Span in Information Diffusion from Observation CoRR (2011)
Yuki Yamagishi, Kazumi Saito, Kouzou Ohara, Masahiro Kimura, Hiroshi Motoda
Learning Attribute-weighted Voter Model over Social Networks. ACML (2011)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Learning information diffusion model in a social network for predicting influence of nodes. Intell. Data Anal. 15 (4) (2011)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Behavioral Analyses of Information Diffusion Models by Observed Data of Social Network. SBP (2010)
Masahiro Kimura, Kazumi Saito, Kouzou Ohara, Hiroshi Motoda
Learning to Predict Opinion Share in Social Networks. AAAI (2010)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Generative Models of Information Diffusion with Asynchronous Timedelay. ACML (2010)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Efficient Estimation of Cumulative Influence for Multiple Activation Information Diffusion Model with Continuous Time Delay. PRICAI (2010)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Selecting Information Diffusion Models over Social Networks for Behavioral Analysis. ECML/PKDD (3) (2010)
Takayasu Fushimi, Kazumi Saito, Masahiro Kimura, Hiroshi Motoda, Kouzou Ohara
Finding Relation between PageRank and Voter Model. PKAW (2010)
Yuya Yoshikawa, Kazumi Saito, Hiroshi Motoda, Kouzou Ohara, Masahiro Kimura
Acquiring Expected Influence Curve from Single Diffusion Sequence. PKAW (2010)
Kouzou Ohara, Yu Fujimoto, Tomofumi Shiina
Recommendation of Little Known Good Travel Destinations Using Word-of-Mouth Information on the Web. AMT (2010)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Discovery of Super-Mediators of Information Diffusion in Social Networks. Discovery Science (2010)
Kazumi Saito, Masahiro Kimura, Kouzou Ohara, Hiroshi Motoda
Learning Continuous-Time Information Diffusion Model for Social Behavioral Data Analysis. ACML (2009)
Kouzou Ohara, Masahiro Hara, Kiyoto Takabayashi, Hiroshi Motoda, Takashi Washio
Pruning Strategies Based on the Upper Bound of Information Gain for Discriminative Subgraph Mining. PKAW (2008)
Alexandre Termier, Marie-Christine Rousset, Michèle Sebag, Kouzou Ohara, Takashi Washio, Hiroshi Motoda
DryadeParent, An Efficient and Robust Closed Attribute Tree Mining Algorithm. IEEE Trans. Knowl. Data Eng. 20 (3) (2008)
Noboru Babaguchi, Kouzou Ohara, Takehiro Ogura
Learning Personal Preference From Viewer's Operations for Browsing and Its Application to Baseball Video Retrieval and Summarization. IEEE Trans. Multim. 9 (5) (2007)
Phu Chien Nguyen, Kouzou Ohara, Akira Mogi, Hiroshi Motoda, Takashi Washio
Constructing Decision Trees for Graph-Structured Data by Chunkingless Graph-Based Induction. PAKDD (2006)
Kiyoto Takabayashi, Phu Chien Nguyen, Kouzou Ohara, Hiroshi Motoda, Takashi Washio
Extracting Discriminative Patterns from Graph Structured Data Using Constrained Search. PKAW (2006)
Warodom Geamsakul, Tetsuya Yoshida, Kouzou Ohara, Hiroshi Motoda, Hideto Yokoi, Katsuhiko Takabayashi
Constructing a Decision Tree for Graph-Structured Data and its Applications. Fundam. Informaticae 66 (1-2) (2005)
Phu Chien Nguyen, Kouzou Ohara, Hiroshi Motoda, Takashi Washio
Cl-GBI: A Novel Approach for Extracting Typical Patterns from Graph-Structured Data. PAKDD (2005)
Tetsuya Yoshida, Akira Mogi, Kouzou Ohara, Hiroshi Motoda, Takashi Washio
Refining diagnostic knowledge extracted from interferon therapy by graph-based induction. AMT (2005)
Alexandre Termier, Marie-Christine Rousset, Michèle Sebag, Kouzou Ohara, Takashi Washio, Hiroshi Motoda
Efficient Mining of High Branching Factor Attribute Trees. ICDM (2005)
Phu Chien Nguyen, Takashi Washio, Kouzou Ohara, Hiroshi Motoda
Using a Hash-Based Method for Apriori-Based Graph Mining. PKDD (2004)
Kouzou Ohara, Yukio Onishi, Noboru Babaguchi, Hiroshi Motoda
Constructive Inductive Learning Based on Meta-attributes. Discovery Science (2004)
Warodom Geamsakul, Takashi Matsuda, Tetsuya Yoshida, Kouzou Ohara, Hiroshi Motoda, Takashi Washio, Hideto Yokoi, Katsuhiko Takabayashi
Analysis of Hepatitis Dataset by Decision Tree Based on Graph-Based Induction. JSAI Workshops (2004)
Warodom Geamsakul, Tetsuya Yoshida, Kouzou Ohara, Hiroshi Motoda, Takashi Washio, Hideto Yokoi, Katsuhiko Takabayashi
Extracting Diagnostic Knowledge from Hepatitis Dataset by Decision Tree Graph-Based Induction. Active Mining (2003)
Kouzou Ohara, Takehiro Ogura, Noboru Babaguchi
On Personalizing Video Portal System with Metadata. KES (2003)
Kouichi Katsurada, Makoto Koyama, Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
Converting Ordinary Rules into Default Rules Based on Contradiction of Knowledge Base. EJC (2000)
Kouichi Katsurada, Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
On Operations for Reconstructing the Complete/Incomplete Knowledge. EJC (2000)
Kouzou Ohara, Hideyuki Taka, Noboru Babaguchi, Tadahiro Kitahashi
Determination of General Concept in Learning Default Rules. PRICAI (2000)
Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
An Efficient Hypothesis Search Algorithm Based on Best-Bound Search. ILP Work-in-progress reports (2000)
Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
Non-monotonic inference system handling knowledge allowing classified exceptions. SMC (1998)
Kouichi Katsurada, Makoto Koyama, Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
Solving contradiction in knowledge-base without interaction. SMC (1998)
Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
On Formation of Exception Hierarchy. PRICAI (1996)
Kouzou Ohara, Noboru Babaguchi, Tadahiro Kitahashi
A Query Procedure for Allowing Exceptions in Advanced Logical Database. IEA/AIE (1996)