TOKAI UNIVERSITY Researchers Guide 2020

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Broadband dielectric spectroscopy (BDS) is the most powerful method for observation of the dynamics of molecules in an extremely wide time window between mega-seconds and pico-seconds that covers the dynamics of solids to liquids. The progress of understanding the dynamics of aqueous solutions of molecular liquids, polymers, and proteins from solid to liquid states have been achieved by using BDS. The universal dynamical hierarchy from fast and local water molecules to slow and global hydrated guest molecules are successfully explained. These findings can be applicable to water in foods, bio tissues, articial organs, and any other various materials including water.ResearchAreasMathematical and physical sciencesKeywords■Dielectric relaxation■Glass transition■Water■Ice■PolymerRelatedresearchSDGDynamics in Aqueous Systems Studied by Broadband Dielectric SpectroscopyProfessorNaoki ShinyashikiUndergraduate School of ScienceDepartment of PhysicsUnimaginable high-energy astrophysical phenomena are occurring in the universe. Their main players are black holes, neutron stars, relativistic jets, and so on, and they are thought to be huge particle accelerators. By observing the very-high-energy gamma rays emitted by these high-energy particles, we aim to elucidate the origin of cosmic rays and high-energy celestial phenomena of various scales that occur in extra-galaxies, such as active galactic nuclei, as well as in our Galaxy.ResearchAreasMathematical and physical sciencesKeywords■High energy astrophysics■Cosmic rays■Gamma-ray astronomy■Neutrinos■Active galactic nucleiRelatedresearchSDGUnderstanding the high-energy astrophysical phenomena and identifying the origin of cosmic raysProfessorKyoshi NishijimaUndergraduate School of ScienceDepartment of PhysicsA flexible photonic sensor coupled with optical fiber developed in Tokai University allows wide selectivity of detecting various gas species and can offer minimum interference by other trace gas species, remote sensing capabilities, moreover, potentially at low cost system. Recently, it is increasing of importance to nd out one's own diseases information based on breath analysis. In such clinical application, the optical sensor based on novel laser spectroscopy should be as a reliable and simple monitor detecting changes in trace gas constituents in their breath during a reasonably short time sequence.ResearchAreasInterdisciplinary science and engineeringKeywords■Optical sensor■Laser device■Laser spectroscopy■Laser measurement technologyRelatedresearchSDGA highly sensitive trace material sensor based on novel laser spectroscopic techniquesProfessorShigeru YamaguchiUndergraduate School of ScienceDepartment of Physics62