Takafumi Toyoda

Study on the baryon interaction by Ξ hypernuclear spectroscopy with the (K −, K +) reaction

T. Gogami, Shunsuke Kanatsuki, T. Nagae, J. K. Ahn et autres

We performed Ξ hypernuclear spectroscopy with the ( K − , K + ) reaction at J-PARC to investigate the Ξ N interaction (J-PARC E05). A new experiment (J-PARC E70) in which a better energy resolution could be achieved is now being …

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Adhesive behavior of a calcium carbonate particle to solid walls having different hydrophilic characteristics

Ruri Hidema, Takafumi Toyoda, Hiroshi Suzuki, Yoshiyuki Komoda et autres

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Fabrication Process of Silica Hard-shell Microcapsule (HSMC) Containing Phase-change Materials

Takafumi Toyoda, Reishi Narisada, Hiroshi Suzuki, Ruri Hidema et autres

Abstract A fabrication process via the double-emulsion method is proposed for silica hard-shell microcapsules (HSMCs) that contain trimethylolethane (TME) hydrate. The TME-encapsulating silica-HSMCs are promising materials for reusable phase-change materials for latent-heat transportation systems. The obtained silica-HSMCs were visualized by a scanning …

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Phase Separation Characteristics of Ammonium Alum Hydrates with Poly Vinyl Alcohol

Ruri Hidema, Takuya Tano, Hiroshi Suzuki, Makoto Fujii et autres

Aluminum ammonium sulfate dodecahydrate (ammonium alum hydrate) slurries are promising latent heat media for high temperature applications. However, a major problem associated with materials developed specifically for high temperature use is sedimentation in the pipes of the device. Thus, the ability of …

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Crystal Growth and Viscosity Behaviors of Ammonium Alum Hydrate Solution with PVA in Shear Flow

Takafumi Toyoda, Ruri Hidema, Hiroshi Suzuki, Yoshiyuki Komoda

Aluminum ammonium sulfate dodecahydrate (ammonium alum hydrate) slurry is a promising latent heat medium for high-temperature systems. However, there exist the significant issues with this medium at high temperature with respect to crystal agglomeration, growth, and sedimentation. Therefore, the effects of adding …

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Broadband reflectarray with convex strip elements for dual-polarization use

Takafumi Toyoda, Daichi Higashi, Hiroyuki Deguchi, Mikio Tsuji

This paper proposes new reflectarray elements for dual-polarization and wideband use. These elements provide liner phase property with the same slope characteristics for dual polarization, thereby achieving the desirable reflection phase over wide frequency range. The usefulness of the proposed elements is …

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