Results 81 to 90 of about 129,913 (284)

On the Relationship between the Inhomogeneous Wave and Helmholtz Equations in a Fractional Setting

Abstract and Applied Analysis, 2019
We study convergence of solutions of a space and time inhomogeneous fractional wave equation on the quarter-plane to the stationary regime described by solutions of the Helmholtz equation.
Mateo Dulce, Alexander Getmanenko
doaj   +1 more source

Existence of Frequency Modes Coupling Seismic Waves and Vibrating Tall Buildings [PDF]

, 2014
We prove in this paper an existence result for frequency modes coupling seismic waves and vibrating tall buildings. The derivation from physical principles of a set of equations modeling this phenomenon was done in previous studies.
Volkov, Darko, Zheltukhin, Sergey
core  

Magnetic Force Microscopy Signatures of Higher‐Order Skyrmions and Antiskyrmions

Advanced Functional Materials, EarlyView.
Magnetic force microscopy operated under vacuum conditions enables the qualitative identification of higher‐order skyrmions and antiskyrmions in Co/Ni multilayers at room temperature. Distinct stray‐field contrast signatures arise from vertical Bloch lines and complex domain‐wall configurations.
Sabri Koraltan, Joe Sunny, Tamer Karaman, Reshma Peremadathil‐Pradeep, Emily Darwin, Felix Büttner, Dieter Suess, Hans Josef Hug, Manfred Albrecht   +8 more
wiley   +1 more source

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

Helmholtz Resonance in Korean Bells

International Scholastic Journal of Science, 2017
Traditional Korean bells are installed above a shallow well with a gap between the bell and the ground, effectively creating a Helmholtz resonator. During installation, the size of the well and the gap is traditionally adjusted, through trial and error ...
Junghyun Kim
doaj  

On stability of discretizations of the Helmholtz equation (extended version)

, 2011
We review the stability properties of several discretizations of the Helmholtz equation at large wavenumbers. For a model problem in a polygon, a complete $k$-explicit stability (including $k$-explicit stability of the continuous problem) and convergence
A Bayliss, A. Buffa, AH Barnett, AK Aziz, B Pluymers, C Farhat, CS Morawetz, E Perrey-Debain, EA Spence, F. Ihlenburg, I Babuška, I Babuška, I Harari, I Harari, I. Babuška, JM Melenk, JM Melenk, JM Melenk, L Banjai, M Ainsworth, M Ainsworth, M Ainsworth, M Stojek, O Cessenat, O Cessenat, O Laghrouche, P Cummings, P Monk, P Monk, P Ortiz, R Hiptmair, R Leis, R Tezaur, RJ Astley, SA Sauter, SI Pohožaev, SN Chandler-Wilde, T Betcke, T Huttunen, T Huttunen, T Strouboulis, U Hetmaniuk, X Feng, X Feng, ZC Li   +44 more
core   +1 more source

Electrolyte Design Strategies for Static Shuttle‐Free and Long‐Life Aqueous Zinc‐Iodine Batteries

Advanced Functional Materials, EarlyView.
This review systematically summarizes recent advances in electrolyte design for static aqueous Zn‐I2 batteries, highlighting solvation regulation and interfacial engineering strategies to control reaction kinetics, suppress iodine shuttling, enhance energy density, and stabilize multi‐electron iodine redox chemistry for durable, high‐performance energy
Qianqin Zhou, Fan Zhang, Ting Liao, Ziqi Sun   +3 more
wiley   +1 more source

Fast algorithms for Quadrature by Expansion I: Globally valid expansions

, 2017
The use of integral equation methods for the efficient numerical solution of PDE boundary value problems requires two main tools: quadrature rules for the evaluation of layer potential integral operators with singular kernels, and fast algorithms for ...
Klöckner, Andreas, O'Neil, Michael, Rachh, Manas   +2 more
core   +1 more source

Partial Balayage for the Helmholtz Equation

Potential Analysis
Abstract Kow, Larson, Salo and Shahgholian recently initiated the study of quadrature domains for the Helmholtz equation and developed an associated theory of partial balayage of measures. The present paper offers an alternative approach to partial balayage in this context that yields stronger results.
Gardiner, Stephen J., Sjödin, Tomas
openaire   +3 more sources

Dual‐Programmable Architected Magnetic Soft Materials: Tuning Mechano–Electric Responses by Inverse Design

Advanced Functional Materials, EarlyView.
ABSTRACT Materials that can deform, sense, and autonomously generate power in response to wireless magnetic fields, through both magnetic‐actuated shape transformation and charge generation, are an emerging focus in advanced functional materials research.
Zhi Zhao, Xiaojia Shelly Zhang
wiley   +1 more source