2021

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Alleviating Cold-Start Problems in Recommendation through Pseudo-Labelling over Knowledge Graph
Riku Togashi | Mayu Otani | Shin'ichi Satoh
WSDM '21, The Fourteenth ACM International Conference on Web Search and Data Mining, Virtual Event, Israel, March 8-12, 2021

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Scalable Personalised Item Ranking through Parametric Density Estimation
Riku Togashi | Masahiro Kato | Mayu Otani | Tetsuya Sakai | Shin'ichi Satoh
SIGIR '21: The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval, Virtual Event, Canada, July 11-15, 2021

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Density-Ratio Based Personalised Ranking from Implicit Feedback
Riku Togashi | Masahiro Kato | Mayu Otani | Shin'ichi Satoh
WWW '21: The Web Conference 2021, Virtual Event / Ljubljana, Slovenia, April 19-23, 2021

2020

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Automatic Evaluation of Iconic Image Retrieval based on Colour, Shape, and Texture
Riku Togashi | Sumio Fujita | Tetsuya Sakai
Proceedings of the 2020 on International Conference on Multimedia Retrieval, ICMR 2020, Dublin, Ireland, June 8-11, 2020

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Visual Intents vs. Clicks, Likes, and Purchases in E-commerce
Riku Togashi | Tetsuya Sakai
Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020

2019

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Closing the Gap Between Query and Database through Query Feature Transformation in C2C e-Commerce Visual Search
Takuma Yamaguchi | Kosuke Arase | Riku Togashi | Shunya Ueta
Proceedings of the SIGIR 2019 Workshop on eCommerce, co-located with the 42st International ACM SIGIR Conference on Research and Development in Information Retrieval, eCom@SIGIR 2019, Paris, France, July 25, 2019

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Generalising Kendall's Tau for Noisy and Incomplete Preference Judgements
Riku Togashi | Tetsuya Sakai
Proceedings of the 2019 ACM SIGIR International Conference on Theory of Information Retrieval, ICTIR 2019, Santa Clara, CA, USA, October 2-5, 2019

2018

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Classifying Community QA Questions That Contain an Image
Kenta Tamaki | Riku Togashi | Sosuke Kato | Sumio Fujita | Hideyuki Maeda | Tetsuya Sakai
Proceedings of the 2018 ACM SIGIR International Conference on Theory of Information Retrieval, ICTIR 2018, Tianjin, China, September 14-17, 2018

2017

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LSTM vs. BM25 for Open-domain QA: A Hands-on Comparison of Effectiveness and Efficiency
Sosuke Kato | Riku Togashi | Hideyuki Maeda | Sumio Fujita | Tetsuya Sakai
Proceedings of the 40th International ACM SIGIR Conference on Research and Development in Information Retrieval, Shinjuku, Tokyo, Japan, August 7-11, 2017

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Euclidean Image Embedding in view of Similarity Ranking in Auction Search by Image
Riku Togashi | Hideyuki Maeda | Vibhor Kanojia | Kousuke Morimoto | Sumio Fujita
Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017

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Enhancing Knowledge Graph Embedding with Probabilistic Negative Sampling
Vibhor Kanojia | Hideyuki Maeda | Riku Togashi | Sumio Fujita
Proceedings of the 26th International Conference on World Wide Web Companion, Perth, Australia, April 3-7, 2017

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