Search results for "lector"

Building integrated solar thermal design: assessment of performances of a low cost solar wall in a typical Italian building

2016

Abstract Present work deals with the topic of building integration of solar thermal collector (BIST) as a refurbishment measure. Such equipment, more than its main function as heating generator, plays a specific role as a building component (envelope finishes, thermal insulation layer, roof cover etc). Consequently, from a heat transfer point of view, an integrated component affects twice the global building balance: supporting the thermal plant (i.e. providing heat for final uses) and modifying the wall heat-transfer pattern (i.e. reducing thermal losses). In turn, the collector performance itself is influenced by the wall structure (back losses reduction). Present work proposes a method f…

BUILDING INTEGRATED SOLAR THERMAL DESIGN: CHARACTERISATION AND ASSESSMENT OF PERFORMANCES OF A LOW COST SOLAR WALL.

Federalism, Proportionality, and Popular Will in US Presidential Elections: Did Colorado Have the Right Idea?

2015

As is well known, the United States is a federal country composed of 50 states plus the District of Columbia, where the individual states and the country as a whole are each sovereign jurisdictions. This is reflected everywhere in its political-administrative structure, including the election of the US President, who is elected by the Electoral College and not directly by the people; an issue that provokes a confrontation between abolishers of the Electoral College and supporters of the current system each time a candidate not winning the most popular votes is elected President (last time in 2000 elections). Between both extremes, there are intermediate solutions that, while continuing to r…

Encauzar al México bronco

2006

¿Reproduciendo la lógica mediática?. Un estudio empírico sobre el impacto del debate electoral español en nuevos y viejos medios

2013

Producción Científica

La blogosfera política española en las Elecciones Generales 2011. Una comparación entre blogs de candidatos, periodistas y ciudadanos

2015

En: Doxa Comunicación : revista interdisciplinar de estudios de comunicación y ciencias sociales. ISSN 1696-019X n. XXI, 2015, pp 78-112 El presente estudio propone un análisis de la blogosfera política española durante la campaña electoral previa a las Elecciones Generales del 20 de noviembre de 2011, con el fin de identificar los principales temas de discusión que centraron el debate en tres tipos de bitácoras: seis blogs de candidatos políticos de las principales formaciones políticas españolas, cuatro a cargo de periodistas destacados de la esfera pública central y cuatro de ciudadanos anónimos. Se plantea un análisis de contenido fundamentado en 57 categorías temáticas para establecer …

Evaluation of retro-reflective coating performance by reflectance and perceived relative brightness measurements

2011

Retro-reflective properties of six types and five different colors or retro-reflective materials were discussed in this paper. Reflectance optical indicatrix of samples was determined and compared to obtained psychophyisical data of perceived brightness of human observer. Microscopic structure of the retro-reflective active regions of RR's was studied. Statistically significant differences in reflectivity and brightness of various types and colors of RR's were found.

Más allá del voto

2007

Life Cycle Assessment Performance Comparison of Small Solar Thermal Cooling Systems with Conventional Plants Assisted with Photovoltaics

2012

Abstract Life Cycle Assessment (LCA) allows for the consideration of energy consumption and environmental impacts associated with all the stages of a product's life, from the cradle to the grave . Starting from the results obtained in the IEA SHC Task 38 framework for the LCA of small solar assisted heat driven chillers, the application of such methodology has been extended to systems with a conventional compression chiller assisted by a photovoltaic plant. This study aims to provide a more comprehensive investigation through a comparison of these two families of solar assisted cooling systems (with solar thermal or PV), which is an important topic for studies concerning the research of eff…

Energy and economic assessment of desiccant cooling systems coupled with single glazed air and hybrid PV/thermal solar collectors for applications in…

2009

Abstract This paper presents a detailed analysis of the energy and economic performance of desiccant cooling systems (DEC) equipped with both single glazed standard air and hybrid photovoltaic/thermal (PV/t) collectors for applications in hot and humid climates. The use of ‘solar cogeneration’ by means of PV/t hybrid collectors enables the simultaneous production of electricity and heat, which can be directly used by desiccant air handling units, thereby making it possible to achieve very energy savings. The present work shows the results of detailed simulations conducted for a set of desiccant cooling systems operating without any heat storage. System performance was investigated through h…