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In this work we propose a novel space-dependent multiscale model for the spread of infectious diseases in a two-dimensional spatial context on realistic geographical scenarios. The model couples a system of kinetic transport equations…

Numerical Analysis · Mathematics 2020-12-21 Walter Boscheri , Giacomo Dimarco , Lorenzo Pareschi

This paper is concerned with a parabolic-elliptic Keller-Segel system where both diffusive and chemotactic coefficients (motility functions) depend on the chemical signal density. This system was originally proposed by Keller and Segel in…

Analysis of PDEs · Mathematics 2021-07-28 Zhi-An Wang

We consider non-local Schr\"odinger operators with kinetic terms given by several different types of functions of the Laplacian and potentials decaying to zero at infinity, and derive conditions ruling embedded eigenvalues out. Our goal in…

Spectral Theory · Mathematics 2022-08-18 Atsuhide Ishida , József Lőrinczi , Itaru Sasaki

This paper investigates a class of chemotaxis systems modeling lethal interactions in a smooth, bounded domain $\Omega \subset \mathbb{R}^n$ with homogeneous Neumann boundary conditions. We examine two distinct cases: (i) a fully parabolic…

Analysis of PDEs · Mathematics 2026-02-06 Gnanasekaran Shanmugasundaram , Jitraj Saha

We consider the Cauchy problem for the Keller-Segel system of consumption type coupled with the incompressible Euler equations in $\mathbb{R}^2$. This coupled system describes a biological phenomenon in which aerobic bacteria living in…

Analysis of PDEs · Mathematics 2024-01-18 Jungkyoung Na

Mathematical models that describe the tumor growth process have been formulated by several authors in order to understand how cancer develops and to develop new treatment approaches. In this study, it is aimed to investigate the long-time…

Analysis of PDEs · Mathematics 2020-08-26 Harald Garcke , Sema Yayla

We study a Keller-Segel type chemotaxis model with a modified sensitivity function in a bounded domain $\Omega\subset \mathbb{R}^N$, $N\geq2$. The global existence of classical solutions to the fully parabolic system is established provided…

Analysis of PDEs · Mathematics 2015-05-26 Qi Wang

We derive general kinetic and hydrodynamic models of chemotactic aggregation that describe certain features of the morphogenesis of biological colonies (like bacteria, amoebae, endothelial cells or social insects). Starting from a…

Biological Physics · Physics 2009-11-13 Pierre-Henri Chavanis , Clement Sire

In this work, we propose a theory for the kinetics of emulsions in which a continuous supply of matter feeds droplet growth. We consider cases where growth is either limited by bulk diffusion or the transport through the droplets'…

Soft Condensed Matter · Physics 2026-04-28 Jacqueline Janssen , Frank Jülicher , Christoph A. Weber

We establish global-in-time existence results for thermodynamically consistent reaction-(cross-)diffusion systems coupled to an equation describing heat transfer. Our main interest is to model species-dependent diffusivities, while at the…

Analysis of PDEs · Mathematics 2022-02-11 Julian Fischer , Katharina Hopf , Michael Kniely , Alexander Mielke

This work is devoted to examine the uniqueness and existence of kinetic solutions for a class of scalar conservation laws involving a nonlocal super-critical diffusion operator. Our proof for uniqueness is based upon the analysis on a…

Analysis of PDEs · Mathematics 2017-05-01 Jinlong Wei , Jinqiao Duan , Guangying Lv

In this paper, we investigate existence of global-in-time strong solutions to the kinetic Cucker--Smale model coupled with the Stokes equations in the whole space. By introducing a weighted Sobolev space and using space-time estimates for…

Analysis of PDEs · Mathematics 2024-06-19 Chunyin Jin

Non-local advection is a key process in a range of biological systems, from cells within individuals to the movement of whole organisms. Consequently, in recent years, there has been increasing attention on modelling non-local advection…

Analysis of PDEs · Mathematics 2021-06-14 Valeria Giunta , Thomas Hillen , Mark A. Lewis , Jonathan R. Potts

In this work we use functional methods to prove the boundedness and global existence of solutions for a class of strongly coupled parabolic systems. We apply the results to deduce the global existence of solutions for a classic…

Analysis of PDEs · Mathematics 2014-08-04 Said Kouachi , Kamuela E. Yong , Rana D. Parshad

The hypothesis of molecular chaos plays the central role in kinetic theory, which provides a closure leading to the Boltzmann equation for quantitative description of classic fluids. Yet how to properly extend it to active systems is still…

We propose an approach to model spatial heterogeneity in SIR-type models for the spread of epidemics via \emph{nonlocal aggregation terms}. More precisely, we first consider an SIR model with spatial movements driven by nonlocal aggregation…

Analysis of PDEs · Mathematics 2025-04-03 Marco Di Francesco , Fatemeh Ghaderi Zefreh

We analyse the spin-flip dynamics in kinetic Ising chains with Kimball-Deker-Haake (KDH) transition rates, and evaluate exactly the evolution of global quantities like magnetisation and its fluctuations, and the two-time susceptibilities…

Statistical Mechanics · Physics 2009-04-30 Sreedhar B. Dutta , Malte Henkel , Hyunggyu Park

This paper has been withdrawn by the authors. We consider the attraction-repulsion chemotaxis system (3 complicated PDEs system) under homogeneous Neumann boundary conditions in a bounded domain {\Omega} with smooth boundary, then the…

Analysis of PDEs · Mathematics 2013-07-10 Farhad Hatami , Mohammad Bagher Ghaemi

The asymmetric simple exclusion process with additional Langmuir kinetics, i.e. attachment and detachment in the bulk, is a paradigmatic model for intracellular transport. Here we study this model in the presence of randomly distributed…

Statistical Mechanics · Physics 2009-11-13 Philip Greulich , Andreas Schadschneider

Cells move by run and tumble, a kind of dynamics in which the cell alternates runs over straight lines and re-orientations. This erratic motion may be influenced by external factors, like chemicals, nutrients, the extra-cellular matrix, in…

Cell Behavior · Quantitative Biology 2019-07-02 Nadia Loy , Luigi Preziosi
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