Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Iantchenko, A."'
Publikováno v:
Inverse Problems 40 (4), 045013 (2024)
In this paper we study Love waves in a layered, elastic half-space. We first address the direct problem and we characterize the existence of Love waves through the dispersion relation. We then address the inverse problem and we show how to recover th
Externí odkaz:
http://arxiv.org/abs/2302.08173
Publikováno v:
Proceedings of the Royal Society A, 479(2277) 2023
We present a comprehensive analysis of wavenumber resonances or leaky modes associated with the Rayleigh operator in a half space containing a heterogeneous slab, being motivated by seismology. To this end, we introduce Jost solutions on an appropria
Externí odkaz:
http://arxiv.org/abs/2209.09998
Publikováno v:
J. Math. Phys. 63, 031505 (2022)
We analyze an inverse problem associated with the time-harmonic Rayleigh system on a flat elastic half-space concerning the recovery of Lam\'{e} parameters in a slab beneath a traction-free surface. We employ the Markushevich substitution, while the
Externí odkaz:
http://arxiv.org/abs/2112.03365
Autor:
S. Mazzi, M. Vallar, U. Kumar, O. Krutkin, J. Poley-Sanjuan, L. Simons, J. Ball, S. Brunner, S. Coda, J. Garcia, A. Iantchenko, Ye. O. Kazakov, W. H. Lin, J. Ongena, B. Rofman, L. Villard, the TCV team
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
Following recent observations of unstable Toroidal Alfvén Eigenmodes (TAEs) in a counter-current Neutral Beam Injection (NBI) scenario developed in TCV, an in-depth analysis of the impact of such modes on the global confinement and performance is ca
Externí odkaz:
https://doaj.org/article/dfc5e874d18e489d8d8a44e5d63ee3a3
We analyze the inverse spectral problem on the half line associated with elastic surface waves. Here, we extend the treatment of Love waves [arXiv: 1908.10529] to Rayleigh waves. Under certain conditions, and assuming that the Poisson ratio is consta
Externí odkaz:
http://arxiv.org/abs/1908.11698
We analyze the inverse spectral problem on the half line associated with elastic surface waves. Here, we focus on Love waves. Under certain generic conditions, we establish uniqueness and present a reconstruction scheme for the S- wavespeed with mult
Externí odkaz:
http://arxiv.org/abs/1908.10529
Akademický článek
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The observation that fast ions stabilize ion-temperature-gradient-driven microturbulence has profound implications for future fusion reactors. It is also important in optimizing the performance of present-day devices. In this work, we examine in deta
Externí odkaz:
http://arxiv.org/abs/1801.00664
Autor:
Iantchenko, Aylwin
Turbulence driven by small scale instabilities causes large heat and particle transport and is a major limiting factor of current fusion devices. Above a critical value, the ion temperature gradient leads to the growth of a microinstability -- the io
Externí odkaz:
http://arxiv.org/abs/1712.03587
In this paper, we present a semiclassical description of surface waves or modes in an elastic medium near a boundary, in spatial dimension three. The medium is assumed to be essentially stratified near the boundary at some scale comparable to the wav
Externí odkaz:
http://arxiv.org/abs/1709.06521