Results 121 to 130 of about 2,003,558 (249)

A new ghost cell/level set method for moving boundary problems:application to tumor growth [PDF]

, 2008
In this paper, we present a ghost cell/level set method for the evolution of interfaces whose normal velocity depend upon the solutions of linear and nonlinear quasi-steady reaction-diffusion equations with curvature-dependent boundary conditions.
Macklin, Paul, Lowengrub, John S.
core   +1 more source

Robust Mean–Variance Portfolio Optimization: Mean–Variance–Variance Criterion Versus Mean–Variance–Standard Deviation Criterion

Mathematical Finance, EarlyView.
ABSTRACT We study a dynamic portfolio optimization problem under the mean–variance–variance (M‐V‐V) criterion proposed by Maccheroni et al. It is an analogue of the Arrow–Pratt approximation to the well‐known smooth ambiguity model. Under the standard Black–Scholes framework, we derive fully explicit equilibrium investment strategies in which a DM's ...
David Landriault, Bin Li, Yuanyuan Zhang
wiley   +1 more source

Linear and nonlinear eigenvalue problems for Dirac systems in unbounded domains [PDF]

, 2015
We first study the linear eigenvalue problem for a planar Dirac system in the open half-line and describe the nodal properties of its solutions by means of the rotation number.
Capietto, Anna, Dambrosio, Walter, PAPINI, Duccio   +2 more
core   +1 more source

Drift‐Diffusion Models with Schottky Contacts at Metal–Semiconductor Interfaces

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The paper deals with a drift‐diffusion model for semiconductor devices with Schottky contacts at all metal–semiconductor interfaces. The presented analytical investigations permit Boltzmann as well as Fermi–Dirac statistics for the charge‐carrier densities.
Annegret Glitzky, Matthias Liero
wiley   +1 more source

Frequency‐dependent contraction rates for the Bayesian method to the inverse source problem

Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract This paper addresses an inverse source problem for acoustic waves in a range of frequencies. Our study has two main goals. First, although the problem is severely ill‐posed with a logarithmic stability estimate, we demonstrate, through careful analysis of the forward map's singular values, that increasing the frequency range enhances stability,
Pu‐Zhao Kow, Jenn‐Nan Wang
wiley   +1 more source

Spectral properties for a system of Dirac equations with nonlinear dependence on the spectral parameter

Demonstratio Mathematica
We consider the boundary value problem generated by a system of Dirac equations with polynomials of spectral parameter in the boundary condition. We investigate the continuity of the scattering function and provide Levinson-type formula, which shows that
Çöl Aynur
doaj   +1 more source

Comparative Systematic Analysis of Gray Matter Biophysical Models on a Public Dataset

Magnetic Resonance in Medicine, Volume 96, Issue 5, Page 2278-2291, November 2026.
ABSTRACT Purpose Biophysical models of diffusion tailored to characterize gray matter (GM) microstructure are gaining traction in the neuroimaging community. NEXI, SMEX, SANDI, and SANDIX represent recent efforts to account for different microstructural features, such as soma contributions and inter‐compartment exchange, in the diffusion MRI (dMRI ...
Santiago Mezzano, Quentin Uhl, Tommaso Pavan, Jasmine Nguyen‐Duc, Hansol Lee, Susie Huang, Ileana Jelescu   +6 more
wiley   +1 more source

Calculation of Wall Heat Conductivity under Non-Symmetric Boundary Conditions

Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2010
A mathematical model for heating multi-layer walls with non-symmetric boundary surface conditions has been developed in the paper. Advancing of phase transformation front along cross-section is considered with the purpose to take into account phase and ...
R. I. Yesman
doaj  

Charged spinning fermionic configurations and a mass gap

European Physical Journal C: Particles and Fields
We consider a self-consistent axially symmetric system supported by a classical nonlinear spinor field minimally coupled to electric and magnetic Maxwell fields.
Vladimir Dzhunushaliev, Vladimir Folomeev   +1 more
doaj   +1 more source

Population balance modeling and digital design of degree of agglomeration in industrial crystallization

AIChE Journal, Volume 72, Issue 10, October 2026.
Abstract This study presents a coupled population balance model (PBM) for describing the degree‐of‐agglomeration (DoA) in crystallization by independently tracking total particle and agglomerate number densities. Applied to an industrial active pharmaceutical ingredient, the model outperformed bridge‐counting methods and accurately captured DoA trends ...
Yung‐Shun Kang, Hemalatha Kilari, Neda Nazemifard, C. Benjamin Renner, Yihui Yang, Charles Papageorgiou, Zoltan K. Nagy   +6 more
wiley   +1 more source