I am Kazu Ghalamkari(ガラムカリ和), a postdoc in RIKEN, Japan.
Recently, I have been working with Prof. Kawahara at Osaka University. I am interested in developing methods to analyze higher-order correlations hidden in data.
I like mathematics, machine learning, programming, movies and coffee!
Research Interests
Tensor Decomposition, Non-negative Matrix Factorization, Information Geometry, Machine Learning Theory
テンソル分解,非負行列分解,情報幾何学,機械学習
Memberships
2020.4 – now JSAI (The Japanese Society for Artificial Intelligence)
2017.3 – 2018.3 JPS (The Physical Society of Japan)
Affiliation
Structured Learning Team,
Center for Advanced Intelligence Project (AIP)
RIKEN
Contact
Osaka University, Graduate School of Information Science and Technology, A410
E-mail: kazu.ghalamkari [at_mark] riken.jp
Biosketch
2023.04 – 2026.03 | Special Postdoctoral Researcher Structured Learning Team Center for Advanced Intelligence Project (AIP) RIKEN |
2020.04 – 2023.03 | Ph.D. student / Senior Research Assistant National Institute of Informatics The Graduate University for Advanced Studies |
2018.04 – 2020.03 | Researcher Intelligent Media Processing Group Research & Development Group, Hitachi, Ltd. |
2016.04 – 2018.03 | Graduate Student Theoretical Condensed Matter and Statistical Physics Group Department of Physics, Graduate School of Science Tohoku University |
2012.04 – 2016.03 | Undergraduate Student Department of Physics, Undergraduate School of Science Gakushuin University |
External Stay
2023.09 – 2023.11 | Guest Postdoc Department of Applied Mathematics and Computer Science Cognitive Systems Technical University of Denmark |
2021.11 – 2022.04 | Academic Guest Department of Biosystems Science and Engineering Machine Learning & Computational Biology Lab ETH Zürich |
Periods of leave
Paternity leave 2024.10.7 – 2024.11.7 (4 weeks)
Academic degree
🎓 Doctor of Philosophy in informatics, The Graduate University for Advanced Studies, 2023.3.24
Thesis: Convex Manifold Approximation for Tensors
Committee: Prof. Mahito Sugiyama (chair), Prof. Yuichi Yoshida, Prof. Katsumi Inoue, Prof. Kazushi Mimura, Prof. Makoto Yamada
Thesis
- Convex Manifold Approximation for Tensors [pdf] [Slide]
Doctoral thesis, The Graduate University for Advanced Studies (2023.3.24) - Valley polarization in layer material by light absorption [pdf] [Abst] [Slide]
Master thesis, Graduate School of Science and Faculty of Science (2018.3) - 傾いたディラックコーンにおける磁場中のエネルギー準位構造 [Abst] [Slide]
Bachelor thesis presentation, School of Science, Gakushuin University (2016.3)
💵 Grants and fellowships (PI)
- Danish Data Science Academy, Postdoc Fellowship 2024
NTN-C3: Nonnegative Tensor Networks — Identifying the Limits of Convexity, Gains of Complexity, and Merits of Certainty
1,260,000 DKK (incl. Salary) - 2024.7 – 2025.3 National Institute of Informatics Open Collaborative Research 2024
Unified solver for non-negative tensor factorization
650,000 JPY - 2023.6 – 2024.3 AIP Challenge Program
Quantum Multi-Body Modeling of Non-Negative Tensors
1,000,000 JPY - 2023.4 – 2026.3 RIKEN, Special Postdoctoral Researchers Program
Graph Low-rank Decomposition
Host researcher: Prof. Yoshinobu Kawahara, Osaka Univ.
3,000,000 JPY + Salary - 2021.09 – 2021.03 日本学術振興会 第2回 若手研究者海外挑戦プログラム
情報幾何学に基づくテンソル多体相互作用解析とバイオインフォマティクスへの応用 (declined)
Host researcher: Prof. Karsten BORGWARDT, ETH Zürich - 2021.10 – 2022.04 Young Researchers’ Exchange Programme between Japan and Switzerland 2021
Tensor based many-body interaction analysis by information geometry and its applications to bioinformatics
Host researcher: Prof. Karsten BORGWARDT, ETH Zürich
Travel fee + financial support (15000 CHF) - 2020.04 – 2023.03 Research Fellowship for Young Scientists (DC1)
An information-geometric approach to quantum statistical physics using log-linear models on posets
Host researcher: Prof. Mahito Sugiyama, SOKENDAI
3,100,000 JPY + Salary
👑 Awards
- 👑 AIP Network Laboratory Director Award 🔗
AIPチャレンジプログラム AIPネットワークラボ長賞 2024.3.4 - 📝 Top Reviewer of NeurIPS 2023 (10.2%, 1,197 of 11,725 reviewers), 2023.11.20 🔗
- 👑 JSAI Annual Conference Award 2023 🔗
人工知能学会全国大会(第37回)優秀賞 2023.11.1 - 🎓 School of Multidisciplinary Science Dean’s Award
総合研究大学院大学 複合科学研究科長賞 2023.3.24 - 👑 Best Student Award, National Institute of Informatics
国立情報学研究所優秀学生賞 2022.9.22 - 👑 JSAI Annual Conference Award 2021 🔗
人工知能学会全国大会(第35回)優秀賞 2021.11.1 - 💵 Exemption from Repayment with Outstanding Achievements
Japan Student Services Organization 2018.3
日本学生支援機構奨学金 特に優れた業績による返還免除(全額)
RA, TA and Scholarships
- 💵 The ANRI Fellowship 🔗
2020.11 - 👨🔬 Senior Research Assistant
2020.4 – 2023.3 National Institute of Informatics - 👨🏫 Teaching Assistant: Information science I
2016.9 – 2017.3 Faculty of Science, Tohoku University
Skills
Python | 5 years | Chainer, sklearn, openCV for research. |
Julia | 3 years | Numerical calculation |
Mathematica | 6 years | Wolfram Language for formula processing. |
Fortran90 | half-year | Numerical calculation |
C/C++ | 2 years | Numerical calculation |
Linux | 6 years | Ubuntu for development |
Professional Activities
- 2023
- AIPチャレンジ企画運営委員
- 2022
- 人工知能学会 基本問題研究会(SIG-FPAI研究会) サポートスタッフ 2022.9.27-30
📝 Reviews
- 2024
- IEEE Transactions on Signal Processing
- Conference on Neural Information Processing Systems 2024 (NeurIPS2024), 6 papers
- 2023
- Conference on Neural Information Processing Systems 2023 (NeurIPS2023) [Top Reviewer 🔗], 6 papers
- 2022
- Journal of Machine Learning Research (JMLR)
- Artificial Intelligence and Statistics Conference 2022 (AISTATS2022), 3 papers
- 2021
- Journal of Machine Learning Research (JMLR)
- Artificial Intelligence and Statistics Conference 2021 (AISTATS2021), 2 papers