HAYASHI MASAZUMI

Faculty of Health and Medical Science,Department of Medical Course,Medical Engineering CourseLecturer
Last Updated :2025/10/07

■Researcher basic information

Degree

  • Master of Technology in Information Systems (Professional), Completed professional degree course, Graduate School of Industrial Technology, Tokyo Metropolitan Public University Corporation Advanced Institute of Industrial Technology

■Career

Educational Background

  • Coursework completed without degree in doctoral course, Graduate School of Bio-Applications and Systems Engineering, National University Corporation Tokyo University of Agriculture and Technology

Member History

  • Special Interest Group on Safety and Security, The Japanese Society for Artificial Intelligence
  • JSMS Committee on Multiscale Materials Mechanics
  • Editing Committee of Machine Learning System Security Guidelines, Security Working Group on Machine Learning System, Machine Learning Systems Engineering (MLSE), Japan Society for Software Science and Technology

■Research activity information

Award

  • Sep. 2014

Paper

  • Photoreaction of 2-chlorothiophenol studied by low-temperature matrix-isolation IR spectroscopy with DFT calculation
    Masazumi Hayashi; Rintaro Ichihara; Nobuyuki Akai; Munetaka Nakata
    Journal of Molecular Structure, Nov. 2021, [Reviewed]
    The photoreactions of 2-chlorothiophenol are investigated using matrix-isolation IR spectroscopy combined with density functional theory calculation at the B3LYP/6-311++G(3df,3pd) level. In a Ne matrix, 2,4-cyclopentadien-1-ylidenemethanethione, a five-membered-ring thioketene compound, is identified as the major photoproduct of a reaction similar to Wolff rearrangement. The reaction intermediate is spectroscopically detected as benzothiirene, which is produced from the reactant under UV (lambda >= 275 nm) irradiation and is then converted to the thioketene under lambda >= 325 nm irradiation. Moreover, the complex of benzothiirene and HCl changes into 4-chloro-2,5-cyclohexadiene-1-thione under irradiation at lambda >= 325 nm. By contrast, UV irradiation of 2-chlorothiophenol in an Ar matrix yields primarily 4-chloro-2,5-cyclohexadiene-1-thione via its isomer 2-chloro-2,4-cyclohexadiene-1-thione. (C) 2021 Elsevier B.V. All rights reserved
    DOI URL
  • Photoinduced Wolff rearrangement and tautomerization of 3-chloro-2-hydroxypyridine isolated in an Ar matrix
    Masazumi Hayashi; Hiroto Koga; Takehiro Kumakura; Nobuyuki Akai; Munetaka Nakata
    Journal of Molecular Structure, Nov. 2019, [Reviewed]
    DOI URL

MISC

Books and other publications

Lectures, oral presentations, etc.

Affiliated academic society

  • The Society for Discrete Variational Xα　　　　　　　　　　　　　　　
  • The Japanese Society for Artificial Intelligence　　　　　　　　　　　　　　　
  • Japan Society for Simulation Technology　　　　　　　　　　　　　　　
  • The Society of Materials Science, Japan　　　　　　　　　　　　　　　
  • Information Processing Society of Japan　　　　　　　　　　　　　　　
  • Japan Society for Software Science and Technology　　　　　　　　　　　　　　　
  • The Database Society of Japan　　　　　　　　　　　　　　　
  • Japanese Association for Medical Artificial Intelligence　　　　　　　　　　　　　　　
  • Association for Computing Machinery　　　　　　　　　　　　　　　
  • The Chemical Society of Japan　　　　　　　　　　　　　　　
  • The institution of Professional Engineers, Japan　　　　　　　　　　　　　　　
  • Professional Engineers Alumni Society The University of Tokyo　　　　　　　　　　　　　　　

■Achievement List

Lectures, oral presentations, etc.

  • An attempt to protect data using digital watermarking
    Informatics Research Data Repository (IDR) User Forum 2023, National Insitute of Informatics, 11 Dec. 2023
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  • 30 Jun. 2023
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  • Machine Learning System Security Guidelines
    15 Apr. 2022
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  • 19 Sep. 2021
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  • 07 Sep. 2021
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  • 02 Sep. 2021
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  • 28 Jul. 2021
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  • 30 Jun. 2021
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  • 11 Jun. 2021
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  • An attempt to predict Emergent Large Vessel Occlusion(ELVO) using Machine Learning Techniques
    07 May 2021
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  • 06 Feb. 2021
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  • 18 Sep. 2019
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  • 05 Sep. 2015
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  • 03 Sep. 2014
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  • 19 Oct. 2005 - 22 Oct. 2005
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■University education and qualification information

Qualifications, licenses

  • Associate Professional Engineer, Japan (Biotechnology & Bioengineering)