Results 31 to 40 of about 6,583,849 (249)

Moving Taylor series for solving one-dimensional one-phase Stefan problem

Alexandria Engineering Journal, 2022
In this work, a modified form of Taylor series is proposed which we call the moving Taylor series. We prove theorems that formulate coefficients of the proposed series along with the formula of its time-derivatives.
A. Elsaid, S.M. Helal
doaj   +1 more source

Helix Alignment, Chevrons, and Edge Dislocations in Twist‐Bend Ferroelectric Nematics

Advanced Science, EarlyView.
The recently discovered twist‐bend ferroelectric nematic (NTBF) is the new member of the multiferroic family, representing a fluid with an oblique helicoidal (heliconical) periodic structure of spontaneous electric polarization. The work presents a thorough exploration of the material properties of this phase, how the periodic modulation of ...
Bijaya Basnet, Priyanka Kumari, Sathyanarayana Paladugu, Damian Pociecha, Jakub Karcz, Przemysław Kula, Nataša Vaupotič, Ewa Górecka, Oleg D Lavrentovich   +8 more
wiley   +1 more source

Pedagogical Psychology in the Research Activities of Stefan Baley

Journal of Vasyl Stefanyk Precarpathian National University, 2019
The article is dedicated to the revealing of the problem of pedagogical psychology in research activities and works of Ukrainian and Polish researcher, pedagogue, psychologist, philosopher Stefan Baley (1885-1952).
Mykhailo Podoliak
doaj   +1 more source

In Situ X‐Ray Tomography and Acoustic Emission Monitoring of Damage Evolution in C/C‐SiC Composites Fabricated by Liquid Silicon Infiltration

Advanced Science, EarlyView.
This study investigates how the internal structure of fiber‐reinforced ceramic composites affects their resistance to damage. By combining 3D X‐ray imaging with acoustic emission monitoring during mechanical testing, it reveals how silicon distribution influences crack formation.
Yang Chen, Renato S. M. Almeida, Stefan Flauder, Guillaume Couégnat, Kamen Tushtev, Jürgen Horvath, Peter Wriggers, Kurosch Rezwan   +7 more
wiley   +1 more source

Product‐Reshaped Gas‐Phase Hydrodynamics Govern CO2 Electrolysis in Gas Diffusion Electrodes

Advanced Science, EarlyView.
In gas‐fed CO2${\rm CO}_2$ electrolysers, the gas phase is part of the electrochemical response. As gaseous products form, they change gas composition and flow, which in turn affects CO2${\rm CO}_2$ delivery and CO intermediate availability. This feedback changes the reaction environment needed for multicarbon formation, becoming unavoidable as ...
Abdullah A. Alyahya, Mayra S. Tovar‐Oliva, Blessings G. Malimusi, Sebastián Murcia‐López, María Escudero‐Escribano, Timm Krüger, Ignacio Tudela   +6 more
wiley   +1 more source

Assessing Government Subsidies for Reducing Pesticide Use: A Meta‐Analysis

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT In the efforts being made by governments to reduce pesticide use, subsidies are an important instrument to encourage farmers to adopt more sustainable practices. Yet, their effectiveness remains uncertain due to diverse designs and contexts.
Gaëlle Leduc, Douadia Bougherara, Thi Thanh Mai Ha, Laure Latruffe   +3 more
wiley   +1 more source

Uncovering renewable energy policy impact channels on land values, the local farm structure, and farmland heterogeneity

American Journal of Agricultural Economics, EarlyView.
Abstract Germany's Renewable Energy Sources Act (REA), enacted in 2000 and subsequently amended, subsidized national renewable energy production with fixed feed‐in tariffs for renewable energy sources (RE) from wind, solar, and biogas. Empirical studies suggest that the policy was creating windfall effects for landowners and attribute farmland use ...
Lars Isenhardt, Stefan Seifert, Saskia Wolff, Tobia Lakes, Marten Graubner, Axel Werwatz, Silke Hüttel   +6 more
wiley   +1 more source

A One-Phase Fractional Spatial Stefan Problem with Convective Specification at the Fixed Boundary

Axioms
We address a fractional spatial Stefan problem derived from a non-Fourier heat flux model with a convective boundary condition at the fixed boundary. An explicit solution is obtained in terms of a three-parameter Mittag–Leffler function.
Diego E. Guevara, Sabrina D. Roscani, Domingo A. Tarzia, Lucas D. Venturato   +3 more
doaj   +1 more source

Existence of weak solutions for the Stefan problem with anisotropic Gibbs-Thomson law [PDF]

, 2011
The Stefan problem with Gibbs-Thomson law describes solidification phenomena for pure substances. In applications the surface energy is anisotropic leading to an anisotropic Gibbs-Thomson law. We show the existence of weak solutions to the Stefan problem
Garcke, Harald, Schaubeck, Stefan
core   +1 more source

Hyperbolic Stefan problem with nonlocal boundary conditions

Математичні Студії
In this paper, we consider problems with unknown boundaries for hyperbolic equations and systems with free boundaries with two independent variables. The boundary conditions for such equations in the linear or quasilinear cases are given in nonlocal (non-
V. Kyrylych, G. Beregova, O. Milchenko
doaj   +1 more source