Kenji Yoshimoto

Interfacial Delamination of Aluminum–Epoxy Adhesive System Through CO 2 ‐Induced Bubble Nucleation for Material Recycling

Soichiro Kishimoto, Rajesh Kumar Sharma, Yuto Mori, Takeshi Sato et autres

ABSTRACT Metal‐epoxy multi‐materials, featuring distinct layered architectures, are widely utilized in industrial applications due to their superior mechanical properties and thermal stability. However, their recycling poses significant environmental and technical challenges. This study employs a microcellular physical foaming technique to achieve interfacial …

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Sustainable approach for recycling metal–polymer composites using foaming technology

Rajesh Kumar Sharma, Yuto Mori, Soichiro Kishimoto, Takumitsu Kida et autres

• Bubble nucleation-induced interfacial delamination was studied for Aluminum and 40% glass fiber-reinforced polycarbonate (PCGF40). • A physical foaming process using CO 2 gas and subsequent heating was employed to generate gas bubbles at the interface. • X-ray CT was used to …

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Imaging of breast cancer using reflectance diffuse optical tomography (RDOT)

Nobuko Yoshizawa, Yuko Asano, Kenji Yoshimoto, Hiroko Wada et autres

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Effective pitch reduction of self-assembled lamellae by the use of (PS-b-PMMA) n multiblock copolymers

Kenji Yoshimoto, Takashi Taniguchi

Abstract The current directed self-assembly (DSA) process utilizes a diblock copolymer composed of polystyrene (PS) and polymethylmethacrylate (PMMA) as standard materials. However, domain spacing of the self-assembled PS-b-PMMA is limited to ∼20–30 nm due to weak segregation strength. In this study, we …

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Bottom-up Multiscale Simulation of Nonlinear Rheology for Entangled Polymer Melts: Using Atactic Polystyrene as An Example

Heyi Liang, Kenji Yoshimoto, Stuart J. Rowan, Juan Pablo

A multiscale modeling framework is adapted for the in silico prediction of nonlinear shear rheology of entangled polymer melts. This approach begins with an all-atom model and progresses to two coarser-grained models, the coarse-grained and slip-spring models, through a bottom-up parametrization process …

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Recent developments on multiscale simulations for rheology and complex flow of polymers

Takeshi Sato, Kenji Yoshimoto

Abstract This review summarized the multiscale simulation (MSS) methods for polymeric liquids. Since polymeric liquids have multiscale characteristics of monomeric, mesoscopic, and macroscopic flow scales, MSSs that relate different hierarchical levels are adequate to reproduce flow properties accurately. Our review includes pioneering …

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Deep brain monitoring for extremely low-birth-weight infants utilized time-domain diffuse optical spectroscopy in transmittance mode

Hiroaki Suzuki, Takashi Imanishi, Norihiro Suzuki, Taiki Okuyama et autres

We developed a time-domain diffuse optical spectroscopy system for monitoring deep brain hemodynamics in premature infants in transmittance mode in the clinical setting and showed the system can measure the premature head in transmittance mode.

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Cerebral Oxygen Monitoring in Extremely Low-Birth-Weight Infants Using Time-Domain Near-Infrared Spectroscopy in Transmittance Mode

Hiroaki Suzuki, Toshiyuki Imanishi, Norihiro Suzuki, Teruhiro Okuyama et autres

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Line scan reflectance diffuse optical tomography for breast cancer imaging

Kenji Yoshimoto, Hiroko Wada, Etsuko Ohmae, Nobuko Yoshizawa et autres

We present line scan reflectance diffuse optical tomography (LS-RDOT), a technique to generate quantitative cross-sectional images of hemoglobin concentration, tissue oxygen saturation, water content, and lipid content, for non-invasive bedside imaging of breast cancer. The LS-RDOT system is composed of a single-channel …

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Correction to: Correction by the skin-to-chest wall distance in near-infrared spectroscopy and assessment of breast cancer responses to neoadjuvant chemotherapy

Yuko Asano, Nobuko Yoshizawa, Yukio Ueda, Kenji Yoshimoto et autres

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Water and lipid content of breast tissue measured by six-wavelength time-domain diffuse optical spectroscopy

Hiroko Wada, Nobuko Yoshizawa, Etsuko Ohmae, Yukio Ueda et autres

Significance: The water and lipid content of normal breast tissue showed mammary gland characteristics with less influence from the chest wall using six-wavelength time-domain diffuse optical spectroscopy (TD-DOS) in a reflectance geometry. Aim: To determine the depth sensitivity of a six-wavelength TD-DOS …

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Multiscale rheology model for entangled Nylon 6 melts

Heyi Liang, Kenji Yoshimoto, Masahiro Kitabata, Umi Yamamoto et autres

Abstract A multiscale simulation method is used to calculate the rheological properties of entangled Nylon 6 melts, including the stress relaxation modulus, storage and loss moduli, and the melt viscosity. The three‐level multiscale approach includes all‐atom, coarse‐grained and slip‐spring models, each operating …

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