Results 51 to 60 of about 4,377 (209)

Wormholes in de Sitter branes [PDF]

open access: yes, 2012
In this work we present a class of geometries which describes wormholes in a Randall-Sundrum brane model, focusing on de Sitter backgrounds. Maximal extensions of the solutions are constructed and their causal structures are discussed.
Molina, C., Neves, J. C. S.
core   +2 more sources

Nonoscillatory solutions for the one-dimensional p-Laplacian

open access: yesJournal of Computational and Applied Mathematics, 1998
The author studies the existence of nonoscillatory solutions of the equation \[ \Delta \Phi(\Delta x_{k-1})+f(k,x_k)=0,\quad k=1,2,\cdots \] where \(\Phi:R\rightarrow R\) is defined by \(\Phi(s)=|s|^{p-1}s\) (\(p>1\) fixed), \(f:N\times R\rightarrow R^+\) and \(\{x_k\}_1^\infty\) is a nonnegative sequence with infinitely many positive terms.
openaire   +1 more source

Recessive solutions for nonoscillatory discrete symplectic systems

open access: yesLinear Algebra and its Applications, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Peter Šepitka, Roman Šimon Hilscher
openaire   +1 more source

AMR‐Wind: A Performance‐Portable, High‐Fidelity Flow Solver for Wind Farm Simulations

open access: yesWind Energy, Volume 28, Issue 5, May 2025.
ABSTRACT We present AMR‐Wind, a verified and validated high‐fidelity computational‐fluid‐dynamics code for wind farm flows. AMR‐Wind is a block‐structured, adaptive‐mesh, incompressible‐flow solver that enables predictive simulations of the atmospheric boundary layer and wind plants.
Michael B. Kuhn   +16 more
wiley   +1 more source

An algorithm for the numerical evaluation of the associated Legendre functions that runs in time independent of degree and order

open access: yes, 2017
We describe a method for the numerical evaluation of normalized versions of the associated Legendre functions $P_\nu^{-\mu}$ and $Q_\nu^{-\mu}$ of degrees $0 \leq \nu \leq 1,000,000$ and orders $-\nu \leq \mu \leq \nu$ on the interval $(-1,1)$.
Bremer, James
core   +1 more source

A CFD Simulation‐Based High‐Fidelity Database for Data‐Driven Wake Model Considering Wind Farm Active Yaw Control

open access: yesWind Energy, Volume 28, Issue 5, May 2025.
ABSTRACT A thorough understanding of turbine wakes is essential for various aspects of wind energy, including turbine siting, load evaluation, and wind farm control. However, high‐fidelity time‐domain computational fluid dynamics (CFD) simulations that consider all possible turbulent inflow wind conditions are computationally expensive and impractical ...
Wenhao Xu, Gaohua Li, Feng Guo, Zhen Gao
wiley   +1 more source

Properties of monotonic solutions to half-linear second-order delay differential equations

open access: yesAIMS Mathematics
This paper establishes new monotonic properties of nonoscillatory solutions for second-order half-linear functional differential equations with delayed argument \begin{document}$ \begin{equation*} (a(r)(u'(r))^{m})' = b(r)u^{m}(\varphi(r)) \end ...
Pakize Temtek, Yerzhan Turarov
doaj   +1 more source

Existence of nonoscillatory solutions to nonlinear higher-order neutral dynamic equations

open access: yesAdvances in Difference Equations, 2020
We investigate the existence of different types of nonoscillatory solutions to a class of higher-order nonlinear neutral dynamic equations on a time scale. Two examples are provided to show the significance of the conclusions.
Yang-Cong Qiu   +3 more
doaj   +1 more source

A cost-effective strategy for nonoscillatory convection without clipping [PDF]

open access: yes, 1990
Clipping of narrow extrema and distortion of smooth profiles is a well known problem associated with so-called high resolution nonoscillatory convection schemes.
Leonard, B. P., Niknafs, H. S.
core   +1 more source

On the Finiteness of the Number of Eigenvalues of Jacobi Operators below the Essential Spectrum [PDF]

open access: yes, 2004
We present a new oscillation criterion to determine whether the number of eigenvalues below the essential spectrum of a given Jacobi operator is finite or not.
Luef, Franz, Teschl, Gerald
core   +3 more sources

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