141 citations · 555 across the 14 of their papers we have counts for
14 papers
A Bellman-Ford algorithm for the path-length-weighted distance in graphs
R. Arnau, J. M. Calabuig, L. M. García Raffi +2
Consider a finite directed graph without cycles in which the arrows are weighted. We present an algorithm for the computation of a new distance, called path-length-weighted distanc…
Nonlinear dispersive waves in repulsive lattices
A. Mehrem, N. Jiménez, L. Salmerón-Contreras +4
The propagation of nonlinear waves in a lattice of repelling particles is studied theoretically and experimentally. A simple experimental setup is proposed, consisting in an array…
Formation of high-order acoustic Bessel beams by spiral diffraction gratings
Noé Jiménez, Rubén Picó, Víctor Sánchez-Morcillo +3
The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically and experimentally repor…
Ultradiscrete kinks with supersonic speed in a layered crystal with realistic potentials
Juan F. R. Archilla, Yuriy A. Kosevich, Noé Jiménez +2
We develop a dynamical model of the propagating nonlinear localized excitations, supersonic kinks, in the cation layer in a silicate mica crystal. We start from purely electrostati…
Acoustic Bessel-like beam formation by an axisymmetric grating
N. Jiménez, V. Romero-García, R. Picó +5
We report Bessel-like beam formation of acoustic waves by means of an axisymmetric grating of rigid tori. The results show that the generated beam pattern is similar to that of Bes…
Wave focusing using symmetry matching in axisymmetric acoustic gradient index lenses
V. Romero-García, A. Cebrecos, R. Picó +3
The symmetry matching between the source and the lens results of fundamental interest for lensing applications. In this work we have modeled an axisymmetric gradient index (GRIN) l…
Propagating and evanescent properties of double-point defects in Sonic Crystals
V. Romero-García, J. V. Sánchez-Pérez, and L. M. Garcia-Raffi
Complex Band Structures and Multiple Scattering Theory have been used in this paper to analyze the overlapping of the evanescent waves localized in point defects in Sonic Crystals.…
Analysis of the wave propagation properties of a periodic array of rigid cylinders perpendicular to a finite impedance surface
V. Romero-García, J. V. Sánchez-Pérez, L. M. Garcia-Raffi
The effect of the presence of a finite impedance surface on the wave propagation properties of a two-dimensional periodic array of rigid cylinders with their axes perpendicular to…
Theoretical and experimental evidence of level repulsion states and evanescent modes in sonic crystal stubbed waveguides
V. Romero-García, J. O. Vasseur, L. M. Garcia-Raffi +1
The complex band structures calculated using the Extended Plane Wave Expansion (EPWE) reveal the presence of evanescent modes in periodic systems, never predicted by the classical…
Level repulsion and evanescent waves in sonic crystals
V. Romero-García, J. O. Vasseur, A. C. Hladky-Hennion +2
This work theoretically and experimentally reports the evanescent connections between propagating bands in periodic acoustic materials. The complex band structures obtained by solv…
Tunable wideband bandstop acoustic filter based on 2D multi-physical phenomena periodic systems
V. Romero-García, J. V. Sánchez-Pérez, L. M. Garcia-Raffi
The physical properties of a periodic distribution of absorbent resonators is used in this work to design a tunable wideband bandstop acoustic filter. Analytical and numerical simu…
Evidences of evanescent Bloch waves in Phononic Crystals
V. Romero-García, J. V. Sánchez-Pérez, S. Castiñeira-Ibáñez +1
We show both experimentally and theoretically the evanescent behaviour of modes in the Band Gap (BG) of finite Phononic Crystal (PC). Based on experimental and numerical data we ob…
Evanescent modes in Sonic Crystals: Complex relation dispersion and supercell approximation
V. Romero-García, J. V. Sánchez-Pérez, L. M. Garcia-Raffi
Evanescent modes in complete sonic crystals (SC) and SC with point defects are reported both theoretically and experimentally in this paper. Plane wave expansion (PWE) and, in gene…
Nuclear structure of Ac-231
R. Boutami, M. J. G. Borge, H. Mach +10
The low-energy structure of 231Ac has been investigated by means of gamma ray spectroscopy following the beta-decay of 231Ra. Multipolarities of 28 transitions have been establishe…