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Reseacher

Name KAWAI Takazumi
Official Title Professor
Affiliation Department of Design and Data Science, Faculty of Design and Data Science
E-mail tkawai@tcu.ac.jp
Web
  1. https://www.risys.gl.tcu.ac.jp/Main.php?action=profile&type=detail&selected_lang=E&tchCd=5002154000
  2. https://researchmap.jp/takazumi_kawai?lang=en
  3. https://scholar.google.com/citations?user=9Lu-8u8AAAAJ&hl=ja&oi=ao
Profile Our research interests have primarily centered around atomic-scale simulations for predicting the properties of carbon-based materials, particularly those with potential applications in electronic devices and battery electrodes. Specifically, we have focused on studying the dynamical processes and property changes that occur under external electric fields, such as surface diffusion and chemical reactions.

More recently, we have turned our attention to analyzing time series data with the aim of detecting anomalies that may indicate system failure or breakdown. To achieve this, we have adopted a system invariant analysis technology (SIAT) that enables us to identify changes in the usual relationships among sensors by constructing their corresponding network graphs. This approach has proven highly effective in detecting anomalous behavior, as it is much more robust against system noise and changes in operations that might otherwise result in false positives.
Research Field(Keyword & Summary)
  1. Data Science

  2. Anomaly Detection

  3. Material Physics

  4. Surface Science

  5. Density Functional Calculations

Representative Papers
  1. "Graphitic ribbons without hydrogen-termination: Electronic structures and stabilities", T Kawai, Y Miyamoto, O Sugino, Y Koga, Physical Review B 62 (24), R16349.
  2. "Phase control of graphene nanoribbon by carrier doping: appearance of noncollinear magnetism", K Sawada, F Ishii, M Saito, S Okada, T Kawai, Nano letters 9 (1), 269-272
  3. "Ferromagnetic spin ordering on carbon nanotubes with topological line defects", S Okada, K Nakada, K Kuwabara, K Daigoku, T Kawai, Physical Review B 74 (12), 121412.
  4. "Electronic structure of graphene with a topological line defect", S Okada, T Kawai, K Nakada, Journal of the Physical Society of Japan 80 (1), 013709.
  5. "Chirality-dependent combustion of single-walled carbon nanotubes", Y Miyata, T Kawai, Y Miyamoto, K Yanagi, Y Maniwa, H Kataura, The Journal of Physical Chemistry C 111 (27), 9671-9677
  6. "Carbon three-dimensional architecture formed by intersectional collision of graphene patches", T Kawai, S Okada, Y Miyamoto, A Oshiyama, Physical Review B 72 (3), 035428 61 2005.
  7. "Nanotube and nanohorn nucleation from graphitic patches: tight-binding molecular-dynamics simulations", T Kawai, Y Miyamoto, O Sugino, Y Koga, Physical Review B 66 (3), 033404
  8. "General sum rule for chiral index of coalescing ultrathin nanotubes", T Kawai, Y Miyamoto, O Sugino, Y Koga, Physical review letters 89 (8), 085901
  9. "Self-redirection of tearing edges in graphene: Tight-binding molecular dynamics simulations", T Kawai, S Okada, Y Miyamoto, H Hiura, Physical review B 80 (3), 033401.
  10. "Controlling atomic joints between carbon nanotubes by electric current", A Nagataki, T Kawai, Y Miyamoto, O Suekane, Y Nakayama, Physical review letters 102 (17), 176808.
Patent
  1. WO2019-176063
  2. WO2019-026193
  3. WO2019-092854
  4. WO2018-104985
  5. WO2008-010383
Award Inoue Research Award for Young Scientists
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS) https://nrid.nii.ac.jp/nrid/1000030455571/
Affiliated academic society (Membership type) American Physical Society
Physical Society of Japan
The Japan Society for Industrial and Applied Mathematics
The Fullerens, Nanotubes and Graphene Research Society
Information Processing Society of Japan
Education Field (Undergraduate level) Data Science
Education Field (Graduate level) Data Science, Material Physics

Affiliation