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Universidad Politécnica de Madrid

3 ARTICLES PUBLISHED IN JoVE

Engineering

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass (ADG) Fresnel Lens for Concentrating Photovoltaics

Guido Vallerotto¹, Marta Victoria¹, Stephen Askins¹, Ignacio Antón¹, Gabriel Sala¹, Rebeca Herrero¹, César Domínguez¹

¹Instituto de Energía Solar, Universidad Politécnica de Madrid

The achromatic doublet on glass (ADG) Fresnel lens makes use of two materials with differing dispersion to reduce chromatic aberration and increase attainable concentration. In this paper, a protocol for the complete characterization of the ADG Fresnel lens is presented.

Environment

Laboratory and Field Protocol for Estimating Sheet Erosion Rates from Dendrogeomorphology

Jose Maria Bodoque¹, Juan Antonio Ballesteros-Cánovas^2,3, Juan Manuel Rubiales^4,5, Markus Stoffel^2,3

¹University of Castilla-La Mancha (UCLM), ²Department of Earth Sciences, University of Geneva, ³Institute for Environmental Sciences, University of Geneva, ⁴Departamento de Sistemas y Recursos Naturales, Universidad Politécnica de Madrid, ⁵Departamento de Biodiversidad, Ecología y Evolución, Universidad Complutense de Madrid

Characterizing erosion from dendrogeomorphology has usually focused on accurately finding the starting time of root exposure, by examining macroscopic or cell level changes caused by exposure. Here, we offer a detailed description of different novel techniques to obtain more precise erosion rates from highly accurate microtopographic data.

Bioengineering

Generation of a Simplified Three-Dimensional Skin-on-a-chip Model in a Micromachined Microfluidic Platform

Ignacio Risueño¹, Leticia Valencia¹, Miguel Holgado², Jose L. Jorcano³, Diego Velasco^1,4

¹Department of Bioengineering and Aerospace Engineering, Universidad Carlos III de Madrid (UC3M), ²Group of Optics, Photonics and Biophotonics (GOFB). Center for Biomedical Technology, Universidad Politécnica de Madrid, ³Division of Epithelial Biomedicine, CIEMAT, ⁴Instituto de Investigación Sanitaria Gregorio Marañón

Here, we present a protocol to generate a three-dimensional simplified and undifferentiated skin model using a micromachined microfluidic platform. A parallel flow approach allows the in situ deposition of a dermal compartment for the seeding of epithelial cells on top, all controlled by syringe pumps.