726 papers
This paper investigates how topographical obstacles influence cell chemotaxis by modifying the Keller-Segel model with a spatially dependent chemotaxis coefficient, demonstrating that this modification is crucial for preventing cell concentration blow-up.
This paper introduces the Weighted Planar Stochastic Porous Lattice (WPSPL), a multifractal, scale-free porous substrate, and demonstrates through analytical and numerical methods that bond percolation on this lattice exhibits a continuous family of distinct universality classes with critical exponents that vary with porosity while satisfying the Rushbrooke inequality.
This paper proposes a trajectory-driven global optimization framework, inspired by CMA-ES, that enables unified, high-fidelity structural-hydrodynamic modeling of underwater underactuated and soft robotic systems by simultaneously identifying coupled internal and external parameters, achieving accurate real-to-sim consistency across diverse mechanisms without manual retuning.
This paper establishes a hydrodynamic framework for force dipoles in compressible membranes with odd viscosity by deriving an exact Green tensor that reveals distinct dynamical regimes and chiral observables, such as transverse drift and relative motion, arising from the interplay of shear, compressional, and odd-viscous modes.
This paper presents two new methods for constructing Lagrangians with specific symmetries by deriving relations from Noether's identity that link the Hessian matrix, symmetry transformations, and constants of motion, and then combining these with Helmholtz's conditions to solve the inverse problem of mechanics.
This paper establishes the global existence and uniqueness of generalized solutions for the three-dimensional inviscid quasi-geostrophic equation on a cylindrical domain with a multiply connected cross-section under specific Neumann and no-flux boundary conditions, assuming the initial potential vorticity is essentially bounded.
This paper introduces Partial Decomposition of Granger Causality (PDGC), a novel framework leveraging Partial Information Decomposition to dissect multivariate spectral Granger causality into unique, redundant, and synergistic components, which was successfully applied to physiological networks to reveal distinct patterns of autonomic dysfunction in patients prone to neurally-mediated syncope.
This paper extends classical nucleation theory for virus capsid assembly by incorporating thermal rim fluctuations, demonstrating that these geometric undulations generate an entropic contribution that renormalizes effective line tension and can either lower or raise the nucleation barrier depending on binding energy and temperature.
This paper introduces a minimal model demonstrating that inhomogeneous external friction, through hydrodynamic screening and mechanochemical frustration, can actively guide and oscillate pattern formation in active fluids by coupling local stress regulation with flow-induced chemical redistribution.
This paper introduces a geometric framework of Covariant Multi-Scale Negative Coupling on dynamic Riemannian manifolds to counteract dimensional reduction in dissipative PDEs, theoretically proving the finite dimensionality of global attractors while numerically validating the mechanism's ability to stabilize high-dimensional structural complexity against macroscopic dissipation.
The paper proposes a biologically plausible mechanism where agents occasionally follow a deviating minority neighbor rather than the majority, a simple rule that triggers heavy-tailed reorientation cascades and significantly enhances a swarm's responsiveness to environmental changes while maintaining group cohesion.
This paper addresses the pressure-load inaccuracies in existing immersed interface methods for C0 triangulated surfaces by proposing a pressure-robust formulation that utilizes reconstructed continuous surface normal vectors—via L2 projection or inverse centroid-distance weighting—to significantly reduce numerical leakage.
This paper identifies a novel mechanism called "pseudo-coherence," where non-normal pseudospectral amplification in linearly stable, non-oscillatory stochastic systems drives a sharp transition to intermittent collective temporal organization and irreversible currents without requiring intrinsic oscillators or dynamical instabilities.
This paper introduces NATPS, a novel method that combines the time-reversible Mapping Approach to Surface Hopping (MASH) dynamics with transition path sampling to efficiently simulate rare nonadiabatic events and provide mechanistic insights into photochemical processes while significantly reducing computational costs compared to brute-force approaches.
This paper presents detailed 3D velocity measurements of a premagnetized argon gas-puff Z-pinch implosion, revealing that the spontaneous rotation is driven by the Lorentz force and that even a small axial magnetic field can suppress the zippering effect to improve stagnation homogeneity.
This paper demonstrates that employing NMR pulse sequences to intentionally slow down polarization transfer, rather than accelerating it, can significantly improve SABRE hyperpolarization yields in systems characterized by high magnetic inequivalence and low chemical exchange rates.
This paper introduces , a new implementation of the direct spectral element method using a displacement formulation to calculate synthetic seismograms in self-gravitating, spherically symmetric, anelastic, and transversely isotropic Earth models, which is validated against existing codes with excellent agreement.
This paper demonstrates that the macroscopic behavior of non-equilibrium two-phase flow in porous media can be successfully predicted by mapping droplet distributions onto an equilibrium spin-glass model derived via machine learning and the maximum entropy principle, revealing that the transition to a glassy flow regime with hysteresis and non-linear dynamics coincides with the spin-glass phase transition.
This paper identifies and characterizes a distinct advective boundary layer (ABL) regime that emerges during South Asian monsoon onset when cross-equatorial flow intensifies, causing a dynamical transition from frictional to advection-controlled momentum balance that is governed by a linear diagnostic relation between meridional wind and geopotential gradient scaled by the inertial timescale.
This paper proposes that applying a Lorentz-invariant mixed metric tensor equation to a free neutrino, which treats spacetime variables as equivalent and interchangeable, reveals an internal change in the particle when viewed through conflicting perspectives, a conclusion that holds only if those perspectives are mutually compatible.