Kento Yasuda
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View article: Identifying Comprehension Faults Through Word Embedding and Multimodal Analysis
Identifying Comprehension Faults Through Word Embedding and Multimodal Analysis Open
View article: Demon's variational principle for informational active matter
Demon's variational principle for informational active matter Open
The interplay between information, dissipation, and control is reshaping our understanding of thermodynamics in feedback-regulated systems. We develop the informational Onsager-Machlup principle, a generalized variational framework that un…
View article: Tertiary ammonium counterions outperform quaternary ammonium counterions in ionic comb polymers: overcoming the trade-off between toughness and the elastic modulus
Tertiary ammonium counterions outperform quaternary ammonium counterions in ionic comb polymers: overcoming the trade-off between toughness and the elastic modulus Open
Ionic motifs incorporated into polymers, such as ionomers, polyelectrolytes, polyampholytes, and poly(ionic liquid)s (PILs), serve as physical crosslinks through ionic interactions, presenting an effective molecular design for improving bo…
View article: Thermally Driven Two-Sphere Microswimmer with Internal Feedback Control
Thermally Driven Two-Sphere Microswimmer with Internal Feedback Control Open
View article: Ornstein-Uhlenbeck information swimmers with external and internal feedback controls
Ornstein-Uhlenbeck information swimmers with external and internal feedback controls Open
Using an underdamped active Ornstein-Uhlenbeck particle, we propose two information swimmer models having either external or internal feedback control and perform their numerical simulations. Depending on the velocity that is measured afte…
View article: Ornstein-Uhlenbeck information swimmers with external and internal feedback controls
Ornstein-Uhlenbeck information swimmers with external and internal feedback controls Open
Using an underdamped active Ornstein-Uhlenbeck particle, we propose two information swimmer models having either external or internal feedback control and perform their numerical simulations. Depending on the velocity that is measured afte…
View article: Emergence of odd elasticity in a microswimmer using deep reinforcement learning
Emergence of odd elasticity in a microswimmer using deep reinforcement learning Open
We use the Deep Q-Network with reinforcement learning to investigate the emergence of odd elasticity in an elastic microswimmer model. For an elastic microswimmer, it is challenging to obtain the optimized dynamics due to the intricate ela…
View article: Statistical formulation of Onsager-Machlup variational principle
Statistical formulation of Onsager-Machlup variational principle Open
Onsager's variational principle (OVP) provides us with a systematic way to derive dynamical equations for various soft matter and active matter. By reformulating the Onsager-Machlup variational principle (OMVP), which is a time-global prin…
View article: Time-correlation functions of stochastic three-sphere micromachines
Time-correlation functions of stochastic three-sphere micromachines Open
We discuss and compare the statistical properties of two stochastic three-sphere micromachines, i.e., odd micromachine and thermal micromachine. We calculate the steady state time-correlation functions for these micromachines and decompose…
View article: Irreversibility of stochastic state transitions in Langevin systems with odd elasticity
Irreversibility of stochastic state transitions in Langevin systems with odd elasticity Open
Active microscopic objects, e.g., an enzyme molecule, are modeled by the Langevin system with the odd elasticity, in which energy injection from the substrate to the enzyme is described by the antisymmetric part of the elastic matrix. By a…
View article: Emergence of odd elasticity in a microswimmer using deep reinforcement learning
Emergence of odd elasticity in a microswimmer using deep reinforcement learning Open
We use the Deep Q-Network with reinforcement learning to investigate the emergence of odd elasticity in an elastic microswimmer model. For an elastic microswimmer, it is challenging to obtain the optimized dynamics due to the intricate ela…
View article: Odd Elastohydrodynamics: Non-Reciprocal Living Material in a Viscous Fluid
Odd Elastohydrodynamics: Non-Reciprocal Living Material in a Viscous Fluid Open
This study expands the odd-elastic description of microswimmers to a nonlinear regime and provides a unified framework for studying non-local, non-reciprocal interactions of an elastic material in a viscous fluid, like biological flagellar…
View article: Generalized Three-Sphere Microswimmers
Generalized Three-Sphere Microswimmers Open
Among several models for microswimmers, the three-sphere microswimmer proposed by Najafi and Golestanian captures the essential mechanism for the locomotion of a microswimmer in a viscous fluid. Owing to its simplicity and flexibility, the…
View article: Odd Elasticity of a Catalytic Micromachine
Odd Elasticity of a Catalytic Micromachine Open
We perform numerical simulations of a model micromachine driven by catalytic chemical reactions. Our model includes a mechano-chemical coupling between the structural variables and the nonequilibrium variable describing the catalytic react…
View article: Odd elastohydrodynamics: non-reciprocal living material in a viscous fluid
Odd elastohydrodynamics: non-reciprocal living material in a viscous fluid Open
Motility is a fundamental feature of living matter, encompassing single cells and collective behavior. Such living systems are characterized by non-conservativity of energy and a large diversity of spatio-temporal patterns. Thus, fundament…
View article: Generalized Three-Sphere Microswimmers
Generalized Three-Sphere Microswimmers Open
Among several models for microswimmers, the three-sphere microswimmer proposed by Najafi and Golestanian captures the essential mechanism for the locomotion of a microswimmer in a viscous fluid. Owing to its simplicity and flexibility, the…
View article: Toughening Ionic Polymer Using Bulky Alkylammonium Counterions and Comb Architecture
Toughening Ionic Polymer Using Bulky Alkylammonium Counterions and Comb Architecture Open
Ionic interactions in ionic polymers, such as ionomers, polyelectrolytes, and polyampholytes, contribute to toughness in systems with high mobility and active ion dynamics, such as hydrogels and elastomers. However, it remains challenging …
View article: Onsager’s Variational Principle for Nonreciprocal Systems with Odd Elasticity
Onsager’s Variational Principle for Nonreciprocal Systems with Odd Elasticity Open
Using Onsager's variational principle, we derive dynamical equations for a nonequilibrium active system with odd elasticity. The elimination of the extra variable that is coupled to the nonequilibrium driving force leads to the nonreciproc…
View article: Most probable path of an active Brownian particle
Most probable path of an active Brownian particle Open
In this study, we investigate the transition path of a free active Brownian particle (ABP) on a two-dimensional plane between two given states. The extremum conditions for the most probable path connecting the two states are derived using …
View article: Odd elasticity of a catalytic micromachine
Odd elasticity of a catalytic micromachine Open
We perform numerical simulations of a model micromachine driven by catalytic chemical reactions. Our model includes a mechano-chemical coupling between the structural variables and the nonequilibrium variable describing the catalytic react…
View article: Simulations of Odd Microswimmers
Simulations of Odd Microswimmers Open
We perform numerical simulations of odd microswimmers consisting of three spheres and two odd springs. To describe the hydrodynamic interaction, both the Oseen-type and the Rotne-Prager-Yamakawa (RPY)-type mobilities are used. For the Osee…
View article: Onsager's variational principle for nonreciprocal systems with odd elasticity
Onsager's variational principle for nonreciprocal systems with odd elasticity Open
Using Onsager's variational principle, we derive dynamical equations for a nonequilibrium active system with odd elasticity. The elimination of the extra variable that is coupled to the nonequilibrium driving force leads to the nonreciproc…
View article: A Case of Thoracic SMARCA4-deficient Undifferentiated Tumor Diagnosed Definitely by Pleural Cryobiopsy during Semiflexible Thoracoscopy
A Case of Thoracic SMARCA4-deficient Undifferentiated Tumor Diagnosed Definitely by Pleural Cryobiopsy during Semiflexible Thoracoscopy Open
背景.胸水貯留をきたす疾患の診断に,局所麻酔下胸腔鏡検査は有用である.しかし,従来の生検鉗子では,病変の性質により検体採取が困難である症例を経験することがある.症例.51歳男性.特発性間質性肺炎の診断で当院通院中に,左胸水の貯留が出現した.左胸水貯留に対して局所麻酔下胸腔鏡による鉗子生検を試みたが,線維化により硬化した病変のため鉗子生検が不可能であった.そのため,局所麻酔下胸腔鏡下クライオ生検を施行したところ検体採取が可能であった.病理所見から胸部SMARCA4欠損未分化腫…
View article: Time-correlation functions for odd Langevin systems
Time-correlation functions for odd Langevin systems Open
We investigate the statistical properties of fluctuations in active systems that are governed by nonsymmetric responses. Both an underdamped Langevin system with an odd resistance tensor and an overdamped Langevin system with an odd elasti…
View article: Self-organized swimming with odd elasticity
Self-organized swimming with odd elasticity Open
We theoretically investigate self-oscillating waves of an active material, which were recently introduced as a nonsymmetric part of the elastic moduli, termed odd elasticity. Using Purcell's three-link swimmer model, we reveal that an odd-…
View article: Lateral response of a layered material with interlayer friction
Lateral response of a layered material with interlayer friction Open
We investigate the mechanical properties of a layered material with interlayer friction. We propose a model that contains lateral elasticity and interlayer friction to obtain the response function both in the Fourier and real spaces. By in…
View article: Time-correlation functions for odd Langevin systems
Time-correlation functions for odd Langevin systems Open
We investigate the statistical properties of fluctuations in active systems that are governed by non-symmetric responses. Both an underdamped Langevin system with an odd resistance tensor and an overdamped Langevin system with an odd elast…
View article: The Onsager–Machlup Integral for Non-Reciprocal Systems with Odd Elasticity
The Onsager–Machlup Integral for Non-Reciprocal Systems with Odd Elasticity Open
The variational principle of the Onsager-Machlup integral is used to describe\nthe stochastic dynamics of a micromachine, such as an enzyme, characterized by\nodd elasticity. The obtained most probable path is found to become\nnon-reciproc…
View article: Nonreciprocality of a micromachine driven by a catalytic chemical reaction
Nonreciprocality of a micromachine driven by a catalytic chemical reaction Open
We propose a model that describes cyclic state transitions of a micromachine driven by a catalytic chemical reaction. We consider a mechanochemical coupling of variables representing the degree of a chemical reaction and the internal state…
View article: Odd Microswimmer
Odd Microswimmer Open
We propose a model for a thermally driven microswimmer in which three spheres\nare connected by two springs with odd elasticity. We demonstrate that the\npresence of odd elasticity leads to the directional locomotion of the\nstochastic mic…