Results 21 to 30 of about 8,403,063 (390)

Stability of a $d$-dimensional thin-shell wormhole surrounded by quintessence [PDF]

open access: yes, 2017
We study the stability of different higher dimensional thin--shell wormholes (HDTSW) in general relativity with a cosmological constant. We show that a $d$--dimensional thin--shell wormhole surrounded by quintessence can have three different throat ...
Bahamonde, Sebastian   +2 more
core   +2 more sources

Origin of Efficiency and Stability Enhancement in High‐Performing Mixed Dimensional 2D‐3D Perovskite Solar Cells: A Review

open access: yesAdvanced Functional Materials, 2021
Perovskite solar cells are a potential game changer for the photovoltaics industry, courtesy of their facile fabrication and high efficiency. Despite this, commercialization is being held back by poor stability.
Md Arafat Mahmud   +11 more
semanticscholar   +1 more source

Branched Sulfonimide-Based Proton Exchange Polymer Membranes from Poly(Phenylenebenzopheneone)s for Fuel Cell Applications

open access: yesMembranes, 2021
Improved proton conductivity and high durability are now a high concern for proton exchange membranes (PEMs). Therefore, highly proton conductive PEMs have been synthesized from branched sulfonimide-based poly(phenylenebenzophenone) (SI-branched PPBP ...
Sabuj Chandra Sutradhar   +6 more
doaj   +1 more source

PT Symmetric Schr\"odinger Operators: Reality of the Perturbed Eigenvalues [PDF]

open access: yes, 2010
We prove the reality of the perturbed eigenvalues of some PT symmetric Hamiltonians of physical interest by means of stability methods. In particular we study 2-dimensional generalized harmonic oscillators with polynomial perturbation and the one ...
Caliceti, Emanuela   +2 more
core   +5 more sources

Electric Field-Assisted Filling of Sulfonated Polymers in ePTFE Backing Material for Fuel Cell

open access: yesMembranes, 2022
This study fabricated a composite ePTFE-backed proton-exchange membrane by filling the pores on the ePTFE backing with sulfonated polyarylene ethers through an externally supplied electric field. The morphology changes were observed under an SEM.
Tung-Li Hsieh   +4 more
doaj   +1 more source

Global Stability of a Premixed Reaction Zone (Time-Dependent Liñan’s Problem) [PDF]

open access: yes, 1990
Global stability properties of a premixed, three-dimensional reaction zone are considered. In the nonadiabatic case (i.e., when there is a heat exchange between the reaction zone and the burned gases) there is a unique, spatially one-dimensional steady ...
Adams Robert A.   +10 more
core   +2 more sources

Evaluating dimensional stability in solid wood: a review of current practice

open access: yesJournal of Wood Science, 2019
The degree with which wood shrinks and swells with changing moisture content is an important property which determines its suitability for different applications.
R. Sargent
semanticscholar   +1 more source

Effect of Water Repellents on Hygroscopicity and Dimensional Stability of Densified Fir and Aspen Woods

open access: yes, 2020
This study investigated the effect of pre-impregnation with water-repellent agents on the hygroscopicity and dimensional stability of fir (Abies bornmulleriana Mattf.) and aspen (Populus tremula L.) woods.
Hüseyin Pelit, F. Emiroglu
semanticscholar   +1 more source

Three-dimensional stability of the solar tachocline [PDF]

open access: yes, 2005
The three-dimensional, hydrodynamic stability of the solar tachocline is investigated based on a rotation profile as a function of both latitude and radius.
A. Sule   +10 more
core   +1 more source

One-dimensional nonlinear stability of pathological detonations [PDF]

open access: yes, 2000
In this paper we perform high-resolution one-dimensional time-dependent numerical simulations of detonations for which the underlying steady planar waves are of the pathological type.
Falle, S.A.E.G., Sharpe, G.J.
core   +1 more source

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