Ohnishi Takaaki

Affiliation and department：
Job title：教授

Research field (1)： Other

Research theme for competitive and other funds (8)：

2019 - 2022 地理空間ビッグデータとスパコンを用いた高齢者の生活基盤評価
2017 - 2022 複雑ネットワーク解析に基づく物質・材料探索
2016 - 2020 人口・産業集積の時空間ビッグデータにみられる相転移挙動の計算科学的研究
2015 - 2018 地域社会における生活基盤の持続可能性指標の開発
2014 - 2016 データ駆動型統計学の可能性:動的で複雑な経済・社会現象の帰納的理解に挑む

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Papers (48)：

Takahiro Yoshida, Ryohei Hisano, Takaaki Ohnishi. Gaussian hierarchical latent Dirichlet allocation: Bringing polysemy back. PLOS ONE. 2023. 18. 7. e0288274-e0288274
Kazuki Koyama, Mariko I. Ito, Takaaki Ohnishi. Fluctuation in Grocery Sales by Brand: An Analysis Using Taylor’s Law. The Review of Socionetwork Strategies. 2022. 16. 2. 417-430
Saki Saito, Mariko I. Ito, Takaaki Ohnishi. Fluctuations in the Number of Stores by Industry During the COVID-19 Pandemic Based on Japanese Phone Book Entries. The Review of Socionetwork Strategies. 2022. 16. 2. 545-557
Taizo Horikomi, Mariko I. Ito, Takaaki Ohnishi. ID-POS Data Analysis Using TV Commercial Viewership Data. The Review of Socionetwork Strategies. 2022. 16. 2. 431-451
Takayuki Mizuno, Takaaki Ohnishi, Tsutomu Watanabe. Visualizing Social and Behavior Change due to the Outbreak of COVID-19 Using Mobile Phone Location Data. New Generation Computing. 2021. 39. 3-4. 453-468

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MISC (81)：

小山一樹, 坂口昌徳, 大西立顕. 遅れ時間座標系におけるマウスの脳波時系列データの順列エントロピーによる評価. 信学技報 NLP2023-148. 2024. 123. 428. 119-122
川口裕靖, 大西立顕. ネット掲示板発言小町のLDAによるトピック分析. 研究報告人文科学とコンピュータ(CH). 2024. 2024-CH-134. 6. 1-8
小山一樹, 坂口昌徳, 大西立顕. 順列エントロピーによるマウスの睡眠状態判定の精度向上. 研究報告数理モデル化と問題解決(MPS). 2024. 2024-MPS-147. 27. 1-6
小山一樹, 坂口昌徳, 大西立顕. 睡眠ステージを特徴づけるマウスの脳波時系列の相関次元. 信学技報 NLP2022-122. 2023. 122. 436. 75-80
川口裕靖, 大西立顯. ニコニコ動画を用いた経済トピック時系列の解析. 進化経済学会論集第27集. 2023. 34-46

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Lectures and oral presentations (89)：

Indicator of the Number of Stores and Facilities Suitable for Urban Population Using Scaling Exponents
(Social Informatics 2019 2019)
Applying a Change-point Detection Method to Housing Market Data
(Conference on Complex Systems 2019 2019)
Dimension Reduction of Molecular Fingerprints
(Conference on Complex Systems 2019 2019)
Using two-dimensional Kolmogorov-Smirnov statistics to characterize allometric scaling between population and number of facilities
(FENS 2019 - 10th Polish Symposium on Physics in Economy and Social Sciences 2019)
Continuous increases or decreases in city sizes observed in Japanese telephone directory data
(DPG Spring Meeting 2019)

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Education (3)：

2001 - 2004 The University of Tokyo Graduate School of Frontier Sciences Department of Complexity Science and Engineering
1999 - 2001 The University of Tokyo The Graduate School of Engineering
1995 - 1999 University of Tsukuba

Professional career (1)：

博士(科学) (東京大学)

Work history (9)：

2020/04 - 現在立教大学大学院人工知能科学研究科教授
2013/11 - 2020/03 The University of Tokyo The Graduate School of Information Science and Technology, Department of Mathematical Informatics
2013/10 - 2020/03 The University of Tokyo The Graduate School of Information Science and Technology
2013/08 - 2013/09 Institute of Statistical Research
2012/01 - 2013/09 一般財団法人キヤノングローバル戦略研究所主任研究員

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Association Membership(s) (4)：

JAPAN ASSOCIATION FOR EVOLUTIONARY ECONOMICS , INFORMATION PROCESSING SOCIETY OF JAPAN , JAPANESE ECONOMIC ASSOCIATION , THE PHYSICAL SOCIETY OF JAPAN

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