Abstract

This article presents a simple comparative model which has been developed for the estimation of the performance of photovoltaic (PV) products' cells in indoor environments. The model predicts the performance of PV solar cells, as a function of the distance from a spectrum of artificial (fluorescent light, halogen light, and light-emitting diodes) and natural light. It intends to support designers, while creating PV-integrated products for indoor use. For the models validation, PV cells of 12 commercially available PV-powered products with power ranging from 0.8 to 4 mWp were tested indoors under artificial illumination and natural light. The model is based on the physical measurements of natural and artificial irradiance indoors, along with literature data of PV technologies under low irradiance conditions. The input data of the model are the surface of the solar cell (in m2), the wavelength-dependent spectral response (SR) of the PV cell, the spectral irradiance indoors, and solar cells distance from light sources. The model calculates solar cells' efficiency and power produced under the specific indoor conditions. If using the measured SR of a PV cell and the irradiance as measured indoors, the model can predict the performance of a PV product under mixed indoor light with a typical inaccuracy of around 25%, which is sufficient for a design process. Measurements revealed that under mixed indoor lighting of around 20 W/m2, the efficiency of solar cells in 12 commercially available PV products ranges between 5% and 6% for amorphous silicon (a-Si) cells, 4–6% for multicrystalline silicon (mc-Si) cells, and 5–7% for the monocrystalline silicon (c-Si) cells.

Abstract

Don Quixote’s fascination with Master Peter’s puppet show has spurred artists and stage directors from the 19th century to the present, creating and recreating a definitive repertoire of adaptations for puppets based on Cervantes’ works. As might be expected, in terms of sheer numbers the Don Quixote itself leads off the list of marionette performances on national and international stages. This article, however, focuses on the staging of Manuel de Falla’s opera Master Peter’s Puppet Show (1923) and the Eduardo Vasco’s sole dramatic adaptation of the epic poem Journey to Parnassus (2005). Moreover, this study investigates the aesthe­tics of puppetry through a close reading of these two creations, broadening the cultural and artistic legacy of Cervantes during the 20th and 21st centuries.

Abstract

This article analyzes the production of  Calderon’s comedia Antes que todo es mi dama, directed by Adolfo Marsillach in 1987 and its rupture with the modern tradition of staging  Golden Age classical plays in Spain. This analysis studies the scenic and interpretative mechanisms used to establish an ironical  dialogue with the generic conventions of the cloak and dagger comedia genre.