Takashi NAGATAEmail: takashin at uci dot edu |
Takashi NAGATA is a scientist working on visual search problems. He received his Ph.D. degree in Computer Science from University of California, Irvine in 2022. Before obtaining the Ph.D. degree, he worked 7.5 years in total as a systems engineer in financial industry and a technical support engineer for BigData technologies after he received B.S. degree in information science from Tokyo University of Science, Japan, in 2008 and M.S. in 2010 respectively.
Research Interests
I’m interested in the intersection of machine learning and cognitive science, and its application such as robotics.
Work Experience
- Applied Scientist, Amazon (A9 Visual Search & AR) Jun 2022 - present
- Applied Scientist Intern, Amazon (A9 Visual Search & AR) Summer 2021
- Applied Scientist Intern, Amazon (A9 Visual Search & AR) Summer 2020
- Applied Scientist Intern, Amazon Summer 2019
- Graduate Student Researcher / Teaching Assistant, UC Irvine Sep 2017 - Jun 2022
- Developer Support Engineer, Amazon Web Services Japan Apr 2013 - Aug 2017
- Systems Engineer, Hewlett-Packard Japan, Ltd. Apr 2010 - Mar 2013
Education
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Ph.D. Computer Science, University of California, Irvine, USA. 2022
Concentration: Reinforcement Learning.
Advisor: Prof. Emre Neftci
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M.S. Information Science, Tokyo University of Science, Japan. 2010
Concentration: Controlling multi-robots based on mobile agents.
Advisor: Prof. Munehiro Takimoto
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B.S. Information Science, Tokyo University of Science, Japan. 2008
Concentration: Controlling multi-robots based on mobile agents.
Advisor: Prof. Munehiro Takimoto
Publications
- Xing, J., Nagata, T., Zou, X., Neftci, E., Krichmar, J.L. (2023). Achieving efficient interpretability of reinforcement learning via policy distillation and selective input gradient regularization. Neural Networks 161, 228-241.
- Nagata, T., Xing, J., Kumazawa, T., & Neftci, E. (2022). Uncertainty Aware Model Integration on Reinforcement Learning. IJCNN'22.
- Xing, J., Nagata, T., Zou, X., Neftci, E., & Krichmar, J.L. (2022). Policy Distillation with Selective Input Gradient Regularization for Efficient Interpretability. (Preprint)
- Xing, J., Nagata, T., Chen, K., Zou, X., Neftci, E., & Krichmar, J.L. (2021). Domain Adaptation In Reinforcement Learning Via Latent Unified State Representation. AAAI'21.
- Nagata, T., Takimoto, M., & Kambayashi, Y. (2013). Cooperatively Searching Objects Based on Mobile Agents. Trans. Comput. Collect. Intell., 11, 119-136.
- Nagata, T., Takimoto, M., & Kambayashi, Y. (2009). Suppressing the Total Costs of Executing Tasks Using Mobile Agents. 2009 42nd Hawaii International Conference on System Sciences, 1-10.
Skills
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COMPUTING SKILLS
Programming Languages: Python and Deep Learning frameworks (PyTorch and Tensorflow/Keras), Java, Matlab, and SQL
Operating Systems: Unix (hp-ux and Solaris) and Linux (RHEL and Ubuntu)
Other: Practical knowledge of Amazon Web Services and ITIL based service management (certified ITIL v3 Foundation) -
LANGUAGE SKILLS
Japanese: Native
English: Fluent