Results 41 to 50 of about 368,669 (336)
Frontiers in Materials, 2022 Acoustic energy, especially broadband low-frequency sound energy is part of the environmental mechanical energy acquisition cannot be ignored. Herein, a multi-tube parallel Helmholtz resonator-based triboelectric nanogenerator (MH-TENG) is investigated ...
Qiqi Zhang +6 more
doaj +1 more source
A new species of Daldinia (Xylariaceae) from the Argentine subtropical montane forest [PDF]
, 2016 Based on a combination of morphological, molecular phylogenetic and chemotaxonomic evidence, a new species of Daldinia from Northwest of Argentina is described. Daldinia korfii is morphologically related to D.
Hladki, Adriana Ines +5 more
core +1 more source
Modal damping ratios of the two-degree-of-freedom acoustic model having a Helmholtz resonator
Nihon Kikai Gakkai ronbunshu, 2016 Helmholtz resonators are used in many industrial products as devices for reducing low-frequency noise. An advantage of the Helmholtz resonator is that the structure is simple and applicable to low-frequency noise for its size.
Shinichi MARUYAMA +2 more
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Kelvin-Helmholtz instability of twisted magnetic flux tubes in the solar wind
, 2013 Solar wind plasma is supposed to be structured in magnetic flux tubes carried from the solar surface. Tangential velocity discontinuity near the boundaries of individual tubes may result in Kelvin-Helmholtz instability, which may contribute into the ...
Vörös, Z. +2 more
core +1 more source
Bistable Helmholtz bright solitons in saturable materials [PDF]
, 2009 We present, to the best of our knowledge, the first exact analytical solitons of a nonlinear Helmholtz equation with a saturable refractive-index model.
Aceves +54 more
core +4 more sources
Multifunctional acoustic metasurface based on an array of Helmholtz resonators
Physical review B, 2019 We demonstrate multifunctional acoustic metasurfaces that can simultaneously realize the same functionality or multiple different functionalities at multiple tunable frequencies.
Yifan Zhu, B. Assouar
semanticscholar +1 more source
Generalized Helmholtz equation
Selecciones Matemáticas, 2019 In this paper we introduce the generalized Helmholtz equation and present explicit solutions to this generalized Helmholtz equation, these solutions depend on three holomorphic functions.
Carlos C. Riveros, Armando V. Corro
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Revista Brasileira de Ensino de FísicaNeste artigo apresentamos uma descrição geral da física do violino, analisando os conceitos que lhes dão sustentação física e que revelam toda a riqueza e o potencial pedagógico do assunto.
José Pedro Donoso +3 more
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Kelvin–Helmholtz versus Tearing Instability: What Drives Turbulence in Stochastic Reconnection? [PDF]
Astrophysical Journal, 2019 Over the last few years it became clear that turbulent magnetic reconnection and magnetized turbulence are inseparable. It was not only shown that reconnection is responsible for violating the frozen-in condition in turbulence, but also that stochastic ...
G. Kowal +3 more
semanticscholar +1 more source
On the Hierarchical Preconditioning of the Combined Field Integral Equation
, 2015 This paper analyzes how hierarchical bases preconditioners constructed for the Electric Field Integral Equation (EFIE) can be effectively applied to the Combined Field Integral Equation (CFIE).
Adrian, Simon B. +2 more
core +3 more sources