[EN] Diffraction at the upper edge of a two-dimensional periodic array of finite rigid cylinders immersed in air as well as the effect on its wave propagation properties are numerically and experimentally reported in this ...

[EN] The focusing properties of Fresnel Zone Plates (FZPs) against frequency are analyzed in this work. It is shown that the FZP focal length depends almost linearly on the operating frequency. Focal depth and focal ...

[ES] En este trabajo se cuestiona sobre la necesidad de uno de los instrumentos afines al trombón tenor, el trombón alto, que junto al bajo y el tenor, ha sido una formación la cual ha existido desde las primeras orquestas ...

[EN] In this work, we present a bifocal Fresnel zone plate (BiFZP) capable of generating focusing profiles with two different foci. The performance of the BiFZP is demonstrated in the ultrasound domain, with a very good ...

Objeto de aprendizaje orientado al entendimiento tanto físico como matemático del proceso de carga de una bobina o autoinducción en corriente continua, dentro de la unidad temática del Electromagnetismo. Este vídeo ...

[EN] The image performance of acoustic and ultrasound sensors depends on several fundamental parameters such as depth of focus or lateral resolution. There are currently two different types of acoustic diffractive lenses: ...

A new generation of acoustic barriers is being introduced into the noise control market. These barriers, based on arrays of isolated scatterers, present interesting properties to be used in cities to reduce the transmitted ...

Dada la necesidad del buen uso de la energía eléctrica, se explica la mejora del factor de potencia en instalaciones eléctricas (monofásicas) de corriente alterna para conseguir este fin. Una de las formas más sencilla de ...

[EN] A new open, thin and low frequency acoustic barrier is presented. These barriers, based on arrays of isolated pickets produce high acoustic attenuation in a selective range of frequencies related to their geometry and ...

The transmission of acoustic waves in a fractal distribution of rigid scatterers embedded in air is reported in this work. The Sierpinsky fractal is used to produce a compact small device containing several periodicities, ...