Juan-Senabre Pérez, Francisco Javier(Universitat Politècnica de València, 2013-12-10)
El presente ejercicio tiene como finalidad el estudio del comportamiento de medios
con diferente viscosidad al paso de los ultrasonidos por medio de la técnica ecoimpulso.
En concreto se estudia el comportamiento de ...
Hernandis Caballero, Sebastià(Universitat Politècnica de València, 2018-10-25)
In the present work we show the preliminary results of the use of a side-scan sonar for the monitoring of seagrass Posidonia oceanica and the fan mussel Pinna nobilis in the marine area around the ¿Penyal d¿Ifac¿ in Calpe ...
We report experimental evidences of spatial (angular) filtering of sound beams propagating through sonic crystals. We show that at specific frequencies of the incident wave the paraxial plane wave compo- nents of the beam ...
[EN] This study measures the dorsal aspect target strength (TS; dB re 1¿m2) and TS¿length (standard length, SL; cm) relationships for European anchovy, attained both ex situ and in situ in two different seasons across 7 ...
[EN] A theoretical and experimental study of the propagation of sound beams in- and behind three-dimensional sonic crystals at frequencies close to the band edges is presented. An efficient collimation of the beam behind ...
[EN] Horizontal hydroacoustics is a technique of remote fish detection that has proved to efficiently determine fish density and biomass in shallow or superficial waters. This non-intrusive technique could render better ...
[EN] This paper evaluates the impact of using deep learning techniques in an automatic fish sizing process. Automatic fish sizing with a non-invasive approach involves working with different views of the fish's body and ...
[EN] The method of fundamental solutions has been applied to evaluate the influence of fish models geometrical features on the target strength (TS) directivity and TS frequency response of swimbladdered fish. Simplified ...
García Talavera, Lucía(Universitat Politècnica de València, 2017-10-25)
Tuna is a very popular fish in the feeding in almost the whole world and, in turn, several of its species are catalogued as threatened or in danger of extinction. Due to the shortage caused by overfishing, as well as to ...
Tamarit Castro, Elena(Universitat Politècnica de València, 2017-03-06)
Las praderas de fanerógamas están consideradas entre los ecosistemas marinos más valiosos del planeta, en términos de los bienes y servicios que proveen. Posidonia oceanica (L.) Delile es endémica en el Mediterráneo y es ...
Mauro, Manuela(Universitat Politècnica de València, 2021-03-23)
[ES] A lo largo de la historia, el hombre ha explotado los recursos minerales de la tierra para su supervivencia y desarrollo tecnológico sin un equilibrio con su regeneración. Dado el crecimiento de la población mundial ...
[EN] Fish anatomical vertical dimensions are extracted from a time-of-flight analysis of fish echo shape using narrow bandwidth echosounding of swimming individuals. These vertical dimensions fit a Gumbel distribution model ...
[EN] Underwater noise has been identified as a relevant pollution affecting marine ecosystems in different ways. Despite the numerous studies performed over the last few decades regarding the adverse effect of underwater ...
De Ros Moliner, Ana(Universitat Politècnica de València, 2019-10-23)
[ES] La acción antrópica es responsable de una gran cantidad de ruidos en el medio marino y en
muchas ocasiones con consecuencias devastadoras para los ecosistemas afectados. El atún
rojo del Atlántico (Thunnus thynnus) ...
Muñoz Andrade, Felipe Andrés(Universitat Politècnica de València, 2019-10-23)
[ES] Se obtuvieron valores de potencia del blanco o Target Strength (TS) de ecoregistros de
ecosondas de 200 kHz en un tanque de crecimiento de doradas (Sparus aurata) y
ecoregistros de ecosondas de 200 kHz y 333 kHz en ...
Carrillo la Rosa, Luis Lorenzo(Universitat Politècnica de València, 2017-09-25)
The objective of this work is to develop and verify the reliability of an application to know and determine the target strength of the English Target Strength (TS) of doradas larvae, with information from echo sounders ...
[EN] We propose the application of a numerical model based on the Method of Fundamental Solutions to the estimation of the target strength (TS) of single fish, a crucial parameter for evaluating fish abundance when using ...
A theoretical and experimental study of the propagation of sound beams in and behind two-dimensional sonic crystals at frequencies close to the band edges is presented. Beam focusing is predicted and discussed. We evaluate, ...
[EN] Acoustic target strength (TS) is a key parameter for species identification and stock assessment in fisheries. The TS of fish is influenced by the contrast in acoustic impedance between their tissues and the surrounding ...
The propagation of nonlinear compressional waves in a one-dimensional granular chain driven at one end by a harmonic excitation is studied. The chain is described by a Fermi-Pasta-Ulam (FPU) lattice model with quadratic ...