Buscar en RiuNet

Listar

Todo RiuNet

Mi cuenta

Acceder

Ayuda RiuNet

Admin. UPV

Listar por autor "Cebrecos Ruiz, Alejandro"

Mostrando ítems 1-20 de 35

Página siguiente

A fiber-coupled laser diode design for reflection mode optical resolution photoacoustic microscopy

García-Garrigós, Juan J.; Cebrecos, Alejandro; Navarro-Calvo, Javier A.; Camarena Femenia, Francisco (Elsevier, 2023-07)

[EN] Pulsed Laser Diodes (PLD) are compact and high pulse repetition rate laser sources that show a great potential for low-cost Optical Resolution Photoacoustic Microscopes (OR-PAM). Nevertheless, their non-uniform multimode ...
Acoustic Bessel-like beam formation by an axisymmetric grating

Jimenez, Noe; Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Sánchez Morcillo, Víctor José; García-Raffi, L. M.; Sánchez Pérez, Juan Vicente; Staliünas, Kestutis (European Physical Society, 2014-04)

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 Bessel beams, characterized by elongated ...
Acoustically penetrable sonic crystals based on fluid-like scatterers

Cebrecos Ruiz, Alejandro; Romero García, Vicente; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Botey, M.; Herrero, R.; Cheng, Y. C.; Staliünas, Kestutis (IOP Publishing: Hybrid Open Access, 2015-01-21)

We propose a periodic structure that behaves as a fluid fluid composite for sound waves, where the building blocks are clusters of rigid scatterers. Such building-blocks are penetrable for acoustic waves, and their properties ...
Análisis numérico y experimental de estructuras periódicas formadas por materiales absorbentes

Plumed Lorente, Álvaro (Universitat Politècnica de València, 2014-11-27)

Las estructuras periódicas, son conocidas en acústica por los fenómenos generados en la propagación de ondas de presión a través de estas, consiguiendo fenómenos físicos como cancelación del sonido, focalización, uso ...
Angular bandgaps in sonic crystals: evanescent waves and spatial complex dispersion relation

Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Staliünas, Kestutis; Sánchez Morcillo, Víctor José (American Society of Mechanical Engineers (ASME), 2013-08)

Phononic crystals are artificial materials made of a periodic distribution of solid scatterers embedded into a solid host medium with different physical properties. An interesting case of phononic crystals, known as sonic ...
Asymmetric propagation using enhanced self-demodulation in a chirped phononic crystal

Cebrecos, Alejandro; Jimenez, Noe; Romero García, Vicente; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M. (AIP Publishing, 2016-12)

Asymmetric propagation of acoustic waves is theoretically reported in a chirped phononic crystal made of the combination of two different nonlinear solids. The dispersion of the system is spatially dependent and allows the ...
Beamforming for large-area scan and improved SNR in array-based photoacoustic microscopy

Cebrecos, Alejandro; García-Garrigós, J. J.; Descals, A.; Jimenez, Noe; Benlloch Baviera, Jose María; Camarena Femenia, Francisco (Elsevier, 2021)

[EN] Beamforming enhances the performance of array-based photoacoustic microscopy (PAM) systems for large-area scan. In this study, we quantify the imaging performance of a large field-of-view optical-resolution ...
Broadband quasi perfect absorption using chirped multi-layer porous materials

Jimenez, Noe; Romero García, Vicente; Cebrecos, Alejandro; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M. (AIP Publishing, 2016-12)

This work theoretically analyzes the sound absorption properties of a chirped multi-layer porous material including transmission, in particular showing the broadband unidirectional absorption properties of the system. Using ...
Broadband reduction of the specular reflections by using sonic crystals: A proof of concept for noise mitigation in aerospace applications

García-Raffi, L. M.; Salmerón-Contreras, L.J.; Herrero-Durá, Iván; Picó Vila, Rubén; Redondo, Javier; Sánchez Morcillo, Víctor José; Staliunas, Kestutis; Adkins, N.J.; Cebrecos, Alejandro; Jimenez, Noe; Romero García, Vicente (Elsevier, 2018-02)

[EN] The broadband reduction of the specular reflections by sonic crystals (SCs) is theoretically and experimentally reported in this work. The analysed system consists of a sound source radiating a SC made of acoustically ...
Caracterización y adaptación de impedancia eléctrica de transductores de Langevin montados en placa vibrante para limpieza ultrasónica

Pascual Bajo, Alfredo (Universitat Politècnica de València, 2014-02-14)

El objetivo del proyecto es ver cómo se comporta la placa en relación a su consumo eléctrico, es decir la potencia que consume, en que frecuencias consume más, y a qué es debido. Para lo que usaremos los datos que obtengamos ...
Characterization of Viscoelastic Media Combining Ultrasound and Magnetic-Force Induced Vibrations on an Embedded Soft Magnetic Sphere

Cebrecos, Alejandro; Jimenez, Noe; Tarazona Tárrega, Rafael; Company, Miguel; Benlloch Baviera, Jose María; Camarena Femenia, Francisco (Institute of Electrical and Electronics Engineers, 2021-12)

[EN] We report a method to locally assess the complex shear modulus of a viscoelastic medium. The proposed approach is based on the application of a magnetic force to a millimeter-sized steel sphere embedded in the medium ...
Complex Dispersion Relation Recovery from 2D Periodic Resonant Systems of Finite Size

Cebrecos, Alejandro; Romero-García, Vicente; Groby, Jean Philippe (MDPI AG, 2019-02-01)

[EN] The complex dispersion relations along the main symmetry directions of two-dimensional finite size periodic arrangements of resonant or non-resonant scatterers are recovered by using an extension of the SLaTCoW (Spatial ...
Comprobación y validación del Código Técnico de la Edificación en las aulas docentes del Campus de Gandía

Cebrecos Ruiz, Alejandro (Universitat Politècnica de València, 2017-07-18)

El objeto del proyecto que se redacta a continuación es realizar una revisión de las soluciones constructivas del Campus de Gandía, con el fin de valorar las condiciones actuales respecto al nuevo CTE y las necesidades ...
Desarrollo y análisis de validez de un nuevo sistema experimental de microscopía fotoacústica de resolución óptica

Navarro Calvo, Javier Ángel (Universitat Politècnica de València, 2021-10-04)

[ES] La necesidad actual de seguir creando y mejorando técnicas de imagen para diagnóstico y pre- vención de enfermedades es el motor de miles de investigaciones en el sector de la biomedicina en todo el mundo. Este TFG ...
Desarrollo y caracterización de un transductor ultrasónico impreso en 3D

Zubiaurre Quesada, Ander (Universitat Politècnica de València, 2023-10-10)

[ES] El presente trabajo estudia el uso de la tecnología de impresión 3D en transductores piezoeléctricos para aplicaciones de ensayos no destructivos (NDT). El estudio compara la sensibilidad, ancho de banda y calidad de ...
Diseño de un transductor focalizado de ultrasonidos y evaluación de algoritmos de compensación de respuesta impulsional para un microscopio fotoacústico de resolución óptica

Navarro Calvo, Javier Ángel (Universitat Politècnica de València, 2023-11-02)

[ES] La microscopía fotoacústica de resolución óptica (OR-PAM) es una nueva técnica de imagen biomédica, la cual combina la excitación óptica de diferentes moléculas absorbentes con la detección acústica de las ondas de ...
Dynamic beamforming for large area scan in array-based photoacoustic microscopy

Cebrecos, Alejandro; García-Garrigós, Juan J.; Descals, Andreu; Jimenez, Noe; Benlloch Baviera, Jose María; Camarena Femenia, Francisco (IEEE, 2020-09-11)

[EN] We explore the use of a beamforming method intended for large-area scanning in optical-resolution photoacoustic microscopy. It has been evaluated in a experimental setup that comprises a low-cost laser diode and a ...
Enhanced of sound by soft reflections in exponentially chirped crystals

Cebrecos Ruiz, Alejandro; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; Staliünas, Kestutis; Romero García, Vicente; García-Raffi, L. M. (American Institute of Physics (AIP): Open Access Journals, 2014-12)

The enhancement of sound inside a two dimensional exponentially chirped crystal during the soft reflections of waves is experimentally and theoretically explored in this work. The control of this enhancement is achieved ...
Enhanced transmission band in periodic media with loss modulation

Cebrecos Ruiz, Alejandro; Picó Vila, Rubén; Romero García, Vicente; Yasser, A. M.; Maigyte, L.; Herrero, R.; Botey, M.; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (American Institute of Physics (AIP), 2014-11-17)

We study the propagation of waves in a periodic array of absorbing layers. We report an anomalous increase of wave transmission through the structure related to a decrease of the absorption around the Bragg frequencies. ...
Enhancement of sound in chirped sonic crystals

Romero García, Vicente; Picó Vila, Rubén; Cebrecos Ruiz, Alejandro; Sánchez Morcillo, Víctor José; Staliünas, Kestutis (American Institute of Physics (AIP), 2013)

We propose and experimentally demonstrate a mechanism of sound wave concentration based on soft reflections in chirped sonic crystals. The reported controlled field enhancement occurs at around particular (bright) planes ...