Observation of exceptional points in a spherical open elastic system

Authors: Deguchi, Hiroaki, Matsushima, Kei, Yamada, Takayuki

Subject Terms: Physics - Classical Physics, Physics - Applied Physics, 74J20 (Primary), 74J05 (Secondary)

Access URL: http://arxiv.org/abs/2409.08560

Optimal design problem with thermal radiation

Authors: Kita, Kosuke, Matsushima, Kei, Oka, Tomoyuki

Subject Terms: Mathematics - Analysis of PDEs, Mathematics - Optimization and Control

Access URL: http://arxiv.org/abs/2408.00021

Non-Bloch band theory for time-modulated discrete mechanical systems

Authors: Matsushima, Kei, Yamada, Takayuki

Subject Terms: Physics - Classical Physics, Condensed Matter - Materials Science, Nonlinear Sciences - Pattern Formation and Solitons

Access URL: http://arxiv.org/abs/2407.09871

Orientation Optimization Based on Topological Derivatives in Cooperation with Multi-Material Topology Optimization Based on Extended Level Set Method

Authors: Noda, Masaki, Matsushima, Kei, Yamada, Takayuki

Subject Terms: Computer Science - Computational Engineering, Finance, and Science, Mathematics - Optimization and Control

Access URL: http://arxiv.org/abs/2306.10272

Two-Phase Topology Optimization for Metamaterials with Negative Poisson's Ratio

Authors: Akamatsu, Daichi, Noguchi, Yuki, Matsushima, Kei, Sato, Yuji, Yanagimoto, Jun, Yamada, Takayuki

Source: Composite Structures 311 (2023) 116800

Subject Terms: Physics - Applied Physics, 74Q05

Access URL: http://arxiv.org/abs/2302.10552

Level set-based multiscale topology optimization for a thermal cloak design problem using the homogenization method

Authors: Nakagawa, Makoto, Noguchi, Yuki, Matsushima, Kei, Yamada, Takayuki

Source: International Journal of Heat and Mass Transfer, Vol. 207 (2023), No. 123964

Subject Terms: Computer Science - Computational Engineering, Finance, and Science

Access URL: http://arxiv.org/abs/2302.10918

Exceptional points in cylindrical elastic media with radiation loss

Authors: Matsushima, Kei, Noguchi, Yuki, Yamada, Takayuki

Subject Terms: Physics - Classical Physics, Physics - Applied Physics, 74J05

Access URL: http://arxiv.org/abs/2302.10231

Non-Bloch band theory for time-modulated discrete mechanical systems

Authors: Matsushima, Kei, Yamada, Takayuki

Source: In Journal of Sound and Vibration 20 January 2025 595

A topology optimization of open acoustic waveguides based on a scattering matrix method

Authors: Matsushima, Kei, Isakari, Hiroshi, Takahashi, Toru, Matsumoto, Toshiro

Source: Wave Motion 113C (2022) 102987

Subject Terms: Mathematics - Numerical Analysis, Physics - Computational Physics, 49M41, G.1.9, G.1.6, J.2

Access URL: http://arxiv.org/abs/2201.09533

A coupled-mode theory for two-dimensional exterior Helmholtz problems based on the Neumann and Dirichlet normal mode expansion

Authors: Matsushima, Kei, Noguchi, Yuki, Yamada, Takayuki

Subject Terms: Mathematics - Numerical Analysis, Physics - Computational Physics, 35J05, G.1.8

Access URL: http://arxiv.org/abs/2201.09502

Optimal design of cavity-free mechanical metamaterials exhibiting negative thermal expansion

Authors: Akamatsu, Daichi ^a, Matsushima, Kei ^{a, b}, Yamada, Takayuki ^{a, b, ⁎}

Source: In International Journal of Mechanical Sciences 1 December 2024 283

Orientation optimization via topological derivatives in combination with multi-material topology optimization based on extended level set method

Authors: Noda, Masaki, Matsushima, Kei, Yamada, Takayuki

Source: In Computer Methods in Applied Mechanics and Engineering 5 January 2024 418 Part B

Domain Segmentation Optimization of Multiple Anisotropic Materials With Varying Orientation Angles Using a Topology Optimization Based on the Extended Level Set Method
Mechanical engineering (International congress, IMECE2022)

Authors: Noda, Masaki, Matsushima, Kei, Noguchi, Yuki, Yamada, Takayuki

Source: Proceedings of the International Mechanical Engineering Congress and Exposition. 2B:248-253

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCCN608126843&indx=1&recIds=ETOCCN608126843

Topology Optimization for Acoustic Structures Without Floating Components
Mechanical engineering (International congress, IMECE2022)

Authors: Noguchi, Yuki, Ohta, Yusei, Matsushima, Kei, Yamada, Takayuki

Source: Proceedings of the International Mechanical Engineering Congress and Exposition. 2B:254-260

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCCN608126854&indx=1&recIds=ETOCCN608126854

Magnetic correlations in the pressure-induced superconductor CrAs investigated by $^{75}$As nuclear magnetic resonance

Authors: Matsushima, Kei, Kotegawa, Hisashi, Kuwata, Yoshiki, Tou, Hideki, Kaneyoshi, Jun, Matsuoka, Eiichi, Sugawara, Hitoshi, Sakurai, Takahiro, Ohta, Hitoshi, Harima, Hisatomo

Source: Phys. Rev. B 100, 100501(R) (2019)

Subject Terms: Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons

Access URL: http://arxiv.org/abs/1909.13416

Multi-material topology optimization for additive manufacturing considering dimensional constraints

Authors: Feng, Yukun, Noda, Masaki, Noguchi, Yuki, Matsushima, Kei, Yamada, Takayuki

Source: In Computer Methods in Applied Mechanics and Engineering 15 May 2023 410

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Topology optimization for rarefied gas flow problems using density method and adjoint IP-DSMC

Authors: Guan, Kaiwen, Matsushima, Kei, Noguchi, Yuki, Yamada, Takayuki

Source: In Journal of Computational Physics 1 February 2023 474

Multiscale topology optimization of electromagnetic metamaterials using a high-contrast homogenization method

Authors: Murai, Naoki, Noguchi, Yuki, Matsushima, Kei, Yamada, Takayuki

Source: In Computer Methods in Applied Mechanics and Engineering 1 January 2023 403 Part A