Results 31 to 40 of about 345,470 (293)

A Singularity-Free Boundary Equation Method for Wave Scattering [PDF]

open access: yesIEEE Transactions on Antennas and Propagation, 2011
8 pages, 9 ...
openaire   +2 more sources

Comments on the use of block methods for solving singular boundary value problems [PDF]

open access: yesITM Web of Conferences, 2020
Singular boundary-value problems appear frequently on the modellization of many physical phenomena as in catalytic diffusion reactions, chemical kinetics, thermal-explosion theory, or electro hydrodynamics, among others.
Ramos Higinio
doaj   +1 more source

A multi-domain hybrid method for head-on collision of black holes in particle limit

open access: yes, 2011
A hybrid method is developed based on the spectral and finite-difference methods for solving the inhomogeneous Zerilli equation in time-domain. The developed hybrid method decomposes the domain into the spectral and finite-difference domains.
DEBANANDA CHAKRABORTY   +3 more
core   +1 more source

Absolutely stable difference scheme for a general class of singular perturbation problems

open access: yesAdvances in Difference Equations, 2020
This paper presents an absolutely stable noniterative difference scheme for solving a general class of singular perturbation problems having left, right, internal, or twin boundary layers. The original two-point second-order singular perturbation problem
Essam R. El-Zahar   +5 more
doaj   +1 more source

On Approximate Stationary Radial Solutions for a Class of Boundary Value Problems Arising in Epitaxial Growth Theory [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2020
In this paper, we consider a non-self-adjoint, singular, nonlinear fourth order boundary value problem which arises in the theory of epitaxial growth. It is possible to reduce the fourth order equation to a singular boundary value problem of second order
Amit Kumar Verma   +2 more
doaj   +1 more source

A Nitsche Finite Element Approach for Elliptic Problems with Discontinuous Dirichlet Boundary Conditions

open access: yes, 2017
We present a numerical approximation method for linear diffusion-reaction problems with possibly discontinuous Dirichlet boundary conditions. The solution of such problems can be represented as a linear combination of explicitly known singular functions ...
Baumann, Ramona, Wihler, Thomas P.
core   +1 more source

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Robust and efficient solution of the drum problem via Nystrom approximation of the Fredholm determinant [PDF]

open access: yes, 2014
The drum problem-finding the eigenvalues and eigenfunctions of the Laplacian with Dirichlet boundary condition-has many applications, yet remains challenging for general domains when high accuracy or high frequency is needed.
Barnett, Alex, Zhao, Lin
core   +1 more source

In vitro properties of patient serum predict clinical outcome after high dose rate brachytherapy of hepatocellular carcinoma

open access: yesMolecular Oncology, EarlyView.
Following high dose rate brachytherapy (HDR‐BT) for hepatocellular carcinoma (HCC), patients were classified as responders and nonresponders. Post‐therapy serum induced increased BrdU incorporation and Cyclin E expression of Huh7 and HepG2 cells in nonresponders, but decreased levels in responders.
Lukas Salvermoser   +14 more
wiley   +1 more source

Existence of positive solutions for singular Dirichlet boundary value problems with impulse and derivative dependence

open access: yesBoundary Value Problems, 2020
In this paper, we present a theorem for some impulsive boundary problems with derivative dependence by the upper and lower solutions method. Using the theorem obtained, we consider the existence of positive solutions of some class of singular impulsive ...
Fengfei Jin, Baoqiang Yan
doaj   +1 more source

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