D. Suzuki, S. Tsugawa, K. Tsukamoto, and S. Igari,”On the effectiveness of a contrastive cascade graph learning framework: The power of synthetic cascade data,” PLoS ONE 18(10): e0293032, Oct. 2023. https://doi.org/10.1371/journal.pone.0293032
D. Suzuki, and, S. Tsugawa “Evaluating Community Detection Algorithms for Multilayer Networks: Effectiveness of Link Weights and Link Direction,” Complex Systems, Vol.32, No.2, pp. 211–228, Oct 2023. doi: 10.25088/ComplexSystems.32.2.211
K. Watabe, S. Nakazawa, Y. Sato, S. Tsugawa, and K. Nakagawa “GraphTune: A learning-based graph generative model with tunable structural features,” IEEE Transactions on Network Science and Engineering, Vol.10, No.4, pp. 2226–2238, Jul. 2023. doi: 10.1109/TNSE.2023.3244590
S. Tsugawa, and K. Watabe, “Identifying influential brokers on social media from social network structure,” Proceedings of the 17th International AAAI Conference on Web and Social Media (ICWSM 2023), Vol.17, No.1, pp. 842–853, Jun. 2023. doi: 10.1609/icwsm.v17i1.22193
S. Furukawa, and S. Tsugawa, “Empirical evaluation of link deletion methods for limiting information diffusion on social media,” Social Network Analysis and Mining, Vol.12, No.1, pp.169:1–169:9, Nov. 2022. doi: 10.1007/s13278-022-00994-6
S. Tsugawa, T. Kanetsuki, and J. Sugihara, “Relationship between early-career collaboration among researchers and future funding success in Japanese academia,” PLoS ONE 17(11): e0277621, Nov. 2022. doi: 10.1371/journal.pone.027
J. Haruta, S. Tsugawa, and K. Ogura, “Analyzing annual changes in network structures of a social media application-based information-sharing system in a Japanese community,” BMC Health Services Research, 2022. (to appear)
J. Haruta, and S. Tsugawa, “What types of networks do professionals build, and how are they affected by the results of network evaluation?,” Frontiers in Public Health 9:758809, Nov. 2021. doi: 10.3389/fpubh.2021.758809
S. Tsugawa, and S. Niida, “Analyzing the effects of social network structure on the growth and survival of online communities in Reddit,” IEICE Transactions on Communications, Vol.E104-B, No.7, pp. 760–769, Jul. 2021. doi: 10.1587/transcom.2020CQP0006PDF
J. Haruta, S. Tsugawa, and K. Ogura, “Exploring the structure of social media application-based information-sharing clinical networks in a community in Japan using a social network analysis approach,” Family Medicine and Community Health 2020;8:e000396, Sep. 2020. doi: 10.1136/fmch-2020-000396
S. Tsugawa, and H. Ohsaki, “Benefits of bias in crawl-based network sampling for identifying key node set,” IEEE Access, Vol.8, pp. 75370-75380, May 2020. doi: 10.1109/ACCESS.2020.2988910
Y. Kazawa, and S. Tsugawa, “Effectiveness of link-addition strategies for improving the robustness of both multiplex and interdependent networks,” Physica A: Statistical Mechanics and its Applications, Vol.545, No.1, pp. 123586:1–123586:12, May 2020. doi: 10.1016/j.physa.2019.123586PDF
M. Otsuka, and S. Tsugawa, “Robustness of network attack strategies against node sampling and link errors,” PLoS ONE 14(9): e0221885, Sep. 2019. doi: 10.1371/journal.pone.0221885
S. Tsugawa, “Empirical analysis of the relation between community structure and cascading retweet diffusion,” Proceedings of the Thirteenth International Conference on Web and Social Media (ICWSM 2019), Vol.13, No.1, pp. 493–504, Jun. 2019. PDF
S. Tsugawa, “A survey of social network analysis techniques and their applications to socially aware networking,” IEICE Transactions on Communications, Vol.E102-B, No.1, pp.17–39, Jan. 2019. doi: 10.1587/transcom.2017EBI0003 (invited survery paper)
S. Tsugawa, and K. Kimura, “Identifying influencers from sampled social networks,” Physica A: Statistical Mechanics and its Applications, Vol.507, No.1, pp.294-303, Oct. 2018. doi: 10.1016/j.physa.2018.05.105PDF
S. Tsugawa, and H. Ohsaki, “On the relation between message sentiment and its virality on social media,” Social Network Analysis and Mining, Vol.7, No.1, pp.19:1–19:14, Dec. 2017. PDF The final publication is available at Springer via 10.1007/s13278-017-0439-0
S. Niida, S. Tsugawa, M. Suganuma, and N. Wakamiya, “A survey on modeling of human states in communication behavior,” IEICE Transactions on Communications, Vol.E100-B, No.9, pp.1538-1546, Sep. 2017. doi: 10.1587/transcom.2016PFI0010 (invited survery paper)
S. Tsugawa, and K. Kito, “Retweets as a predictor of relationships among users on social media,” PLoS ONE 12(1): e0170279 19 pages, Jan. 2017. doi: 10.1371/journal.pone.0170279
S. Tsugawa, Y. Matsumoto, and H. Ohsaki, “On the robustness of centrality measures against link weight quantization in social networks,” Computational and Mathematical Organization Theory, Vol.21, No.3, pp.318–339, Sep. 2015, PDF The final publication is available at Springer via http://dx.doi.org/10.1007/s10588-015-9188-7
S. Tsugawa, and H. Ohsaki, “Community structure and interaction locality in social networks,” Journal of Information Processing, Vol.23, No.4, pp.402-410, Jul. 2015., doi: 10.2197/ipsjjip.23.402 (invited paper)
S. Tsugawa, H. Ohsaki, Y. Itoh, N. Ono, K. Kagawa, and K. Takashima, “Dynamic social network analysis with heterogeneous sensors in ambient environment,” Social Networking, Vol.3, No.1, pp.9-18, Jan. 2014. doi: 10.4236/sn.2014.31002
T. Yagi, J. Murayama, T. Hariu, S. Tsugawa, H. Ohsaki, and M. Murata, “Analysis of blacklist update frequency for countering malware attacks on websites,” IEICE Transactions on Communications, Vol.E97-B, No.1, pp.76-86, Jan. 2014.
S. Tsugawa, and H. Ohsaki, “Effectiveness of link prediction for face-to-face behavioral networks,” PLoS ONE 8(12):e81727, 14 pages, Dec. 2013. doi: 10.1371/journal.pone.0081727
S. Tsugawa, H. Ohsaki, and M. Imase, “Lightweight and distributed connectivity-based clustering derived from Schelling’s model,” IEICE Transactions on Communications, Vol.E95-B, No.8, pp.2549-2557, Aug. 2012.
S. Tsugawa, H. Ohsaki, and M. Imase, “Estimating message importance using inferred inter-recipient trust for supporting email triage,” Journal of Information Processing, Vol.20, No.3, pp.796-805, Jul. 2012.
S. Tsugawa, H. Ohsaki, and M. Imase, “Inferring leadership of online development community using topological structure of its social network,” Journal of the Infosocionomics Society, Vol.7, No.1, pp.17-27, May 2012.
レター / Letter Papers
S. Tsugawa, and Y. Onoue, “On the benefits of knowledge about attacker’s strategy for improving the robustness of networks via link addition,” IEICE Communications Express, Vol.11, No.6, pp.336-341, Jun. 2022.
国際会議論文 / International Conference Papers
K. Yasuda, S. Tsugawa, and K. Watabe, “Impact of Graph-to-Sequence Conversion Methods on the Accuracy of Graph Generation for Network Simulations,” in Proceedings of the First IEEE Workshop on Generative AI for Network Management (NOMSGAIN 2024), 5 pages, May 2024.
S. Tsugawa, and T. Nagase, “Using Graph Neural Networks for Identifying Influencers in Social Networks,” in Proceedings of the 10th Anniversary Korea-Japan Joint Workshop on Complex Communication Sciences (KJCCS 2024), 4pages, Jan. 2024.
S. Furukawa, S. Tsugawa, and K. Watabe, “Effectiveness of link deletion methods using history of information diffusion cascades for limiting their future spread on social media,” in Proceedings of the 2023 International Symposium on Nonlinear Theory and its Applications (NOLTA 2023), pp.112–115, Sep. 2023.
T. Yokoyama, Y. Sato, S. Tsugawa, and K. Watabe, “An accurate graph generative model with tunable features,” in Proceedings of the 32nd International Conference on Computer Communications and Networks (ICCCN 2023), pp.1–2, Jul. 2023. (poster)
Y. Fujita, and S. Tsugawa, “Limiting the spread of misinformation on multiplex social networks,” in Proceedings of the 47th Annual IEEE International Computers, Software, and Applications Conference (COMPSAC 2023), pp.406–411, Jun. 2023. (short paper)
M. Matsumoto, and S. Tsugawa, “On the effectiveness of features for predicting user churn in reddit communities,” in Proceedings of the 6th IEEE International Workshop on Advances in Artificial Intelligence & Machine Learning (AIML 2023) in conjunction with COMPSAC’23, pp.1173–,1178 Jun. 2023.
D. Suzuki, and S. Tsugawa, “On the effectiveness of using link weights and link direction for community detection in multilayer networks,” in Proceedings of the 11th International Conference on Complex Networks and their Applications (COMPLEX NETWORKS 2022), pp.638–649, Nov. 2022.
S. Ando, and S. Tsugawa, “Effects of random errors on graph convolutional networks,” in Proceedings of the 55th Hawaii International Conference on System Sciences (HICSS 2022), pp.3285–3294, Jan. 2022. doi: 10.24251/HICSS.2022.402
S. Furukawa, and S. Tsugawa, “Limitations of link deletion for suppressing real information diffusion on social media,” in Proceedings of the 2021 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2021), pp.111–115, Nov. 2021. (short paper)
T. Nagase, and S. Tsugawa, “Effectiveness of a data-based influence maximization algorithm using information diffusion cascades,” in Proceedings of the 45th Annual IEEE International Computers, Software, and Applications Conference (COMPSAC 2021), pp.396–401, Jul. 2021. (short paper)
S. Nakazawa, Y. Sato, K. Nakagawa, S. Tsugawa, and K. Watabe, “A tunable model for graph generation using LSTM and conditional VAE,” in Proceedings of the 41st IEEE International Conference on Distributed Computing Systems (ICDCS 2021), pp.1126–1127, Jul. 2021. (poster)
D. Suzuki, and S. Tsugawa, “Effects of hidden users on cascade-based community detection,” in Proceedings of the 12th International Conference on Complex Networks (CompleNet 2021), pp.1–11, May 2021.
N. Tsuda, and S. Tsugawa, “Effects of community structure in social networks on speed of information diffusion,” in Proceedings of the 9th International Conference on Complex Networks and their Applications (COMPLEX NETWORKS 2020), pp.51-61, Dec. 2020.
Y. Wakisaka, K. Yamashita, S. Tsugawa, and H. Ohsaki, “On the effectiveness of random node sampling in influence maximization on unknown graph,” in Proceedings of the 44th Annual IEEE International Computers, Software, and Applications Conference (COMPSAC 2020), pp.613–618, Jul. 2020. (short paper)
N. Tsuda, and S. Tsugawa, “Effects of truss structure of social network on information diffusion among Twitter users,” in Proceedings of the 11-th International Conference on Intelligent Networking and Collaborative Systems (INCoS 2019), pp.306–315, Sep. 2019.
S. Tsugawa, and S. Niida, “The impact of social network structure on the growth and survival of online communities,” in Proceedings of the Workshop on Social Network Analysis Surveillance Technologies (SNAST 2019) in conjunction with ASONAM’19, pp. 1112–1119, Aug. 2019. doi: 10.1145/3341161.3343526, PDF
M. Uehara, and S. Tsugawa, “Analysis of the evolution of the influence of central nodes in a Twitter social network,” in Proceedings of the 43rd Annual IEEE International Computers, Software, and Applications Conference (Student Research Symposium) (COMPSAC 2019), pp.892–895, Jul. 2019.
Y. Kazawa, and S. Tsugawa, “Proposal of strategic link addition for improving the robustness of multiplex networks,” in Proceedings of the 9th International Conference on Complex Networks (CompleNet 2018), pp.75–84, Mar. 2018. (short paper)
S. Tsugawa, and H. Ohsaki, “On the robustness of influence maximization algorithms against non-adversarial perturbations,” in Proceedings of the 2017 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2017), pp. 91–94, Aug. 2017. (short paper)
Y. Kazawa, and S. Tsugawa, “On the effectiveness of link addition for improving robustness of multiplex networks against layer node-based attack,” in Proceedings of the 41st Annual IEEE International Computers, Software, and Applications Conference (Student Research Symposium) (COMPSAC 2017), pp.697–700, Jul. 2017.
S. Mihara, S. Tsugawa, and H. Ohsaki, “On the effectiveness of random jumps in an influence maximization algorithm for unknown graphs,” in Proceedings of the 31st International Conference on Information Networking (ICOIN 2017), pp. 395–400, Jan. 2017.
K. Kimura, and S. Tsugawa, “Estimating influence of social media users from sampled social networks,” in Proceedings of the Workshop on Social Influence (SI 2016) in conjunction with ASONAM’16, pp. 1302–1308, Aug. 2016. doi: 10.1109/ASONAM.2016.7752405, PDF
Y. Kazawa, and S. Tsugawa, “Robustness of networks with skewed degree distributions under strategic node protection,” in Proceedings of the 4th IEEE International Workshop on Architecture, Design, Deployment and Management of Networks and Applications (ADMNET 2016) in conjunction with COMPSAC’16, pp. 14–19, Jun. 2016. doi: 10.1109/COMPSAC.2016.181, PDF
S. Tsugawa, and H. Ohsaki, “Negative messages spread rapidly and widely on social media,” in Proceedings of the 3rd ACM Conference on Online Social Networks (COSN 2015), pp. 151–160, Nov. 2015. doi: 10.1145/2817946.2817962, PDF
S. Mihara, S. Tsugawa, and H. Ohsaki, “Influence maximization problem for unknown social networks,” in Proceedings of the 1st International Workshop on Dynamics in Networks (DyNo 2015) in conjunction with ASONAM’15, pp. 1539–1546, Aug. 2015. doi: 10.1145/2808797.2808885, PDF
S. Tsugawa, Y. Kikuchi, F. Kishino, K. Nakajima, Y. Itoh, and H. Ohsaki, “Recognizing depression from Twitter activity,” in Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems (CHI 2015), pp. 3187-3196, Apr. 2015. doi: 10.1145/2702123.2702280, PDF
S. Tsugawa, and H. Ohsaki, “Emergence of fractals in social networks: Analysis of community structure and interaction locality,” in Proceedings of the 38th Annual IEEE International Computers, Software, and Applications Conference (COMPSAC 2014), pp. 568-575, Jul. 2014. doi: 10.1109/COMPSAC.2014.80, PDF
S. Tsugawa, Y. Mogi, Y. Kikuchi, F. Kishino, K. Fujita, Y. Itoh, and H. Ohsaki, “On estimating depressive tendency of Twitter users utilizing their tweet data,” in Proceedings of the 2nd International Workshop on Ambient Information Technologies (AMBIT 2013), pp. 29-32, Mar. 2013.
M. Ishino, S. Tsugawa, and H. Ohsaki, “On the robustness of centrality measures against link weight quantization in real weighted social networks,” in Proceedings of the 2nd International Workshop on Ambient Information Technologies (AMBIT 2013), pp. 25-28, Mar. 2013.
S. Tsugawa, Y. Matsumoto, H. Ohsaki and M. Imase, “Robustness of centrality measures against noises in link weights in social network analysis,” in Proceedings of the 9th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2012), 1 page, Nov. 2012. (short paper)
S. Tsugawa, H. Ohsaki and M. Imase, “Effectiveness of link prediction techniques for face-to-face behavioral networks,” in Proceedings of the 2012 Japan-Ireland Workshop on Intelligence and Networks (JIWIN 2012), pp.98-107, Sep. 2012.
Y. Matsumoto, S. Tsugawa, H. Ohsaki, and M. Imase, “Robustness of centrality measures against link weight quantization in social network analysis,” in Proceedings of the 4th Annual Workshop on Simplifying Complex Networks for Practitioners (SIMPLEX 2012), pp. 49-54, Apr. 2012.
S. Tsugawa, H. Ohsaki, and M. Imase, “Lightweight distributed method for connectivity-based clustering based on Schelling’s model,” in Proceedings of the Second International Workshop on Complex Information Flows (CIF 2012), pp.1137-1142, Mar. 2012.
K. Fujita, Y. Itoh, H. Ohsaki, N. Ono, K. Kagawa, K. Takashima, S. Tsugawa, K. Nakajima, Y. Hayashi, and F. Kishino, “Ambient Suite: Room-shaped information environment for interpersonal communication,” in Proceedings of the 1st International Workshop on Ambient Information Technologies (AMBIT 2012), pp. 18-21, Mar. 2012.
S. Tsugawa, H. Ohsaki, Y. Itoh, N. Ono, K. Kagawa, K. Takashima, and M. Imase, “Toward large-scale and dynamic social network analysis with heterogeneous sensors in ambient environment,” in Proceedings of the 1st International Workshop on Ambient Information Technologies (AMBIT 2012), pp. 32-33, Mar. 2012. (poster)
S. Tsugawa, H. Ohsaki, Y. Itoh, N. Ono, K. Kagawa, K. Takashima, and M. Imase, “Quasi-realtime social network construction with heterogeneous sensors in ambient environment,” in Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology (ACE 2011), pp. 75:1-75:2, Nov. 2011. (poster)
K. Fujita, Y. Itoh, H. Ohsaki, N. Ono, K. Kagawa, K. Takashima, S. Tsugawa, K. Nakajima, Y. Hayashi, and F. Kishino, “Ambient Suite: Enhancing communication among multiple participants,” in Proceedings of the 8th International Conference on Advances in Computer Entertainment Technology (ACE 2011), pp. 25:1-25:8, Nov. 2011.
S. Tsugawa, K. Takahashi, H. Ohsaki and M. Imase, “Robust estimation of message importance using inferred inter-recipient trust for supporting email triage,” in Proceedings of the 10th Annual International Symposium on Applications and the Internet (SAINT 2010), pp. 177-180, Jul. 2010.
S. Tsugawa, H. Ohsaki and M. Imase, “Inferring success of online development communities: Application of graph entropy for quantifying leaders’ involvement,” in Proceedings of the 8th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2010), 6 pages, Jun. 2010.
国際会議アブストラクト / International Conference Abstracts
A. Hashimoto, S. Tsugawa, S. Igari, and K. Tsukamoto, “Investigating the effectiveness of using ego-network structures for identifying influencers on social media,” in The 9th International Conference on Computational Social Science (IC2S2), Jul., 2023. (Oral)
Y. Wakisaka, K. Yamashita, S. Tsugawa, and H. Ohsaki, “A Study on the Effectiveness of Random Node Sampling in Influence Maximization on Complex Networks,” in The 14th International Conference on Future Internet Technologies (CFI), Aug., 2019. (Poster)
受賞 / Awards
第39回電気通信普及財団 テレコム学際研究賞 奨励賞:S. Tsugawa, and K. Watabe, “Identifying influential brokers on social media from social network structure,” Proc. ICWSM 2023, Mar. 2024
電子情報通信学会・コミュニケーションクオリティ研究賞:津田 奈子, 津川 翔 “ソーシャルネットワークのコミュニティ構造がTwitter上の投稿の拡散速度に与える影響の分析,” Aug. 2021.
Best Tutorial Paper Award of IEICE Communications Society: S. Tsugawa, “A survey of social network analysis techniques and their applications to socially aware networking,” May 2020.
超異分野学会・リバネス研究費アワード2018:津川 翔, Mar. 2018
電子情報通信学会・学術奨励賞:津川 翔, “ソーシャルメディアにおけるユーザのコミュニティを用いた投稿の拡散規模予測に関する一検討,” 電子情報通信学会総合大会, Mar. 2018.
津川 翔, “ネットワーク科学に基づくソーシャルネットワーク上の情報拡散のモデル化と制御,” 電子情報通信学会総合大会 (XX-XX-XX), pp.–, Mar. 2022. (チュートリアル講演)
S. Tsugawa, “On the relation between community structure and information diffusion on social media,” in 2021 International Conference on Emerging Technologies for Communications (ICETC 2021), Dec. 2021. (invited talk)
津川 翔, “オンラインコミュニティのネットワーク構造がコミュニティの成⻑と⽣存に与える影響,” 電子情報通信学会コミュニケーションクオリティ研究会設立30周年記念シンポジウム, Aug. 2021. (招待講演)
S. Tsugawa, “An introduction of social network analysis techniques for socially aware networking,” in 2020 International Conference on Emerging Technologies for Communications (ICETC 2020), Dec. 2020. (invited talk)