49 citations · 229 across the 16 of their papers we have counts for
16 papers
Multiple pendulum and nonuniform distribution of average kinetic energy
Tetsuro Konishi, Tatsuo Yanagita
Multiple pendulums are investigated numerically and analytically to clarify the nonuniformity of average kinetic energies of particles. The nonuniformity is attributed to the syste…
Dynamically induced conformation depending on excited normal modes of fast oscillation
Yoshiyuki Y. Yamaguchi, Tatsuo Yanagita, Tetsuro Konishi +1
We present dynamical effects on conformation in a simple bead-spring model consisting of three beads connected by two stiff springs. The conformation defined by the bending angle b…
Exact expression for average kinetic energy of 2-dimensional freely jointed chain and a related model
Tetsuro Konishi, Tatsuo Yanagita
For a 2-dimensional freely jointed chain with 3 particles and a related model, the average and variance of the kinetic energies of each particle in thermal equilibrium are exactly…
Sparse optimization of mutual synchronization in collectively oscillating networks
Hiroya Nakao, Katsunori Yamaguchi, Shingo Katayama +1
We consider a pair of collectively oscillating networks of dynamical elements and optimize their internetwork coupling for efficient mutual synchronization based on the phase reduc…
Emergence of Quasi-equilibrium State and Energy Distribution for the Beads-spring Molecule Interacting with a Solvent
Tatsuo Yanagita, Tetsuro Konishi
We study the energy distribution during the emergence of a quasi-equilibrium (QE) state in the course of relaxation to equipartition in slow-fast Hamiltonian systems. A bead-spring…
Optimizing mutual synchronization of rhythmic spatiotemporal patterns in reaction-diffusion systems
Yoji Kawamura, Sho Shirasaka, Tatsuo Yanagita +1
Optimization of the stability of synchronized states between a pair of symmetrically coupled reaction-diffusion systems exhibiting rhythmic spatiotemporal patterns is studied in th…
Thermodynamic Characterization of Synchronization-Optimized Oscillator-Networks
Tatsuo Yanagita, Takashi Ichinomiya
We consider a canonical ensemble of synchronization-optimized networks of identical oscillators under external noise. By performing a Markov chain Monte Carlo (MCMC) simulation usi…
Phase reduction approach to synchronization of spatiotemporal rhythms in reaction-diffusion systems
Hiroya Nakao, Tatsuo Yanagita, Yoji Kawamura
Reaction-diffusion systems can describe a wide class of rhythmic spatiotemporal patterns observed in chemical and biological systems, such as circulating pulses on a ring, oscillat…
Design of Oscillator Networks with Enhanced Synchronization Tolerance against Noise
Tatsuo Yanagita, Alexander S. Mikhailov
Can synchronization properties of a network of identical oscillators in the presence of noise be improved through appropriate rewiring of its connections? What are the optimal netw…
Design of Easily Synchronizable Oscillator Networks Using the Monte Carlo Optimization Method
Tatsuo Yanagita, Alexander S. Mikhailov
Starting with an initial random network of oscillators with a heterogeneous frequency distribution, its autonomous synchronization ability can be largely improved by appropriately…
Slow relaxation to equipartition in spring-chain systems
Tetsuro Konishi, Tatsuo Yanagita
In this study, one-dimensional systems of masses connected by springs, i.e., spring-chain systems, are investigated numerically. The average kinetic energy of chain-end particles o…
Apparent violation of equipartition of energy in constrained dynamical systems
Tetsuro Konishi, Tatsuo Yanagita
We propose a planar chain system, which is a simple mechanical system with a constraint. It is composed of masses connected by light links. It can be considered as a mode…
Exploration of Order in Chaos with Replica Exchange Monte Carlo
Tatsuo Yanagita, Yukito Iba
A method for exploring unstable structures generated by nonlinear dynamical systems is introduced. It is based on the sampling of initial conditions and parameters by Replica Excha…
Pulse Dynamics in Coupled Excitable FIbers: Soliton-like Collision, Recombination, and Overtaking
Hiromichi Suetani, Tatsuo Yanagita, Kazuyuki Aihara
We study the dynamics of a reaction-diffusion system composed of two mutually coupled excitable fibers. We focus on the situation in which dynamical properties of the two fibers ar…
Coupled Map Modeling for Cloud Dynamics
Tatsuo Yanagita, Kunihiko Kaneko
A coupled map model for cloud dynamics is proposed, which consists of the successive operations of the physical processes; buoyancy, diffusion, viscosity, adiabatic expansion, fall…
Rayleigh-Bénard Convection; Patterns, Chaos, Spatiotemporal Chaos and Turbulence
Tatsuo Yanagita, Kunihiko Kaneko
A coupled map lattice for convection is proposed, which consists of Eulerian and Lagrangian procedures. Simulations of the model not only reproduce a wide-range of phenomena in Ray…