Results 71 to 80 of about 1,410,787 (301)

Role of stellar anisotropy and non-minimally coupled f(R) gravity theory in the construction of charged compact objects

open access: yesNuclear Physics B
This study introduces two new charged anisotropic interior configurations within the fluid-geometry associated f(R) gravity model. Our analysis begins with the modified Einstein-Maxwell field equations, which describe a static and charged interior ...
Tayyab Naseer   +4 more
doaj   +1 more source

The Space–Time Kernel-Based Numerical Method for Burgers’ Equations

open access: yesMathematics, 2018
It is well known that major error occur in the time integration instead of the spatial approximation. In this work, anisotropic kernels are used for temporal as well as spatial approximation to construct a numerical scheme for solving nonlinear Burgers ...
Marjan Uddin, Hazrat Ali
doaj   +1 more source

Regularity results for nonlocal fully nonlinear elliptic equations [PDF]

open access: yes, 2013
Rang M. Regularity results for nonlocal fully nonlinear elliptic equations. Bielefeld: Universitätsbibliothek; 2013.In this thesis we consider nonlocal fully nonlinear elliptic operators derived from a certain class of linear integro-differential ...
Rang, Marcus
core  

Flows of singular vector fields and applications to fluid and kinetic equations [PDF]

open access: yes, 2015
Several physical phenomena arising in fluid dynamics and kinetic equations can be modeled by nonlinear transport PDE. Such quantities are the vorticity of a fluid, or the density of a collection of particles advected by a velocity field which is highly ...
Bohun, Anna
core   +1 more source

Flexural Behavior of 3D‐Printed Porous Bouligand‐Structured Polymers: Influence of Pitch Angle and Porosity

open access: yesAdvanced Engineering Materials, EarlyView.
This study examines how helicoidal architectures with different porosities respond to bending. Adjusting layer angle and spacing in 3D‐printed polymers reveals clear tradeoffs between stiffness, strength, and energy absorption. Experiments and simulations highlight designs that distribute stress effectively, offering pathways for optimizing lightweight
Praveenkumar Subhash Patil   +2 more
wiley   +1 more source

Semilinear anisotropic evolution partial differential equations

open access: yesJournal of Mathematical Analysis and Applications, 2003
Consider the anisotropic Cauchy problem \(\partial_t u+P(D)u-G(\partial^\alpha u)=0\) for \(t>0\), \(u(x,0)=u_0(x)\), where \(P(D)=\sum_{| \alpha:\rho| \leq m} c_\alpha D_x^\alpha\) is a quasi-elliptic operator of (anisotropic) order \(m\) and \(G\) is a homogeneous polynomial with constant coefficients.
P. Marcolongo, OLIARO, Alessandro
openaire   +2 more sources

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev   +2 more
wiley   +1 more source

On Entropy Solutions of Anisotropic Elliptic Equations with Variable Nonlinearity Indices

open access: yesСовременная математика: Фундаментальные направления, 2017
For a certain class of second-order anisotropic elliptic equations with variable nonlinearity indices and L1 right-hand side we consider the Dirichlet problem in arbitrary unbounded domains.
L M Kozhevnikova
doaj   +1 more source

Discontinuous Galerkin Methods on hp-Anisotropic Meshes I: A Priori Error Analysis [PDF]

open access: yes, 2006
We consider the a priori error analysis of hp-version interior penalty discontinuous Galerkin methods for second-order partial differential equations with nonnegative characteristic form under weak assumptions on the mesh design and the local finite ...
Emmanuil H. Georgoulis   +5 more
core  

A boundary element approach for solving plane elastostatic equations of anisotropic functionally graded materials

open access: yes, 2019
A boundary element method is proposed for the numerical solution of an important class of boundary value problems governed by plane elastostatic equations of anisotropic functionally graded materials.
Whye‐Teong Ang, Ang, Whye-Teong
core   +1 more source

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