Concept

Light pollution

Related publications (329)

Recent Research on Anidolic Daylighting Systems: Highly Reflective Coating Materials and Chronobiological Properties

Jean-Louis Scartezzini, Mirjam Münch, Friedrich Linhart, Stephen Wittkopf

Making daylight more available in buildings is highly desirable for reasons of energy efficiency, visual comfort, occupant well-being and health. The Anidolic Integrated Ceiling (AIC) is a highly efficient daylighting system, designed to gather and redirec ...

2009

CIE Standard skies in Switzerland: Relative Occurrence and Impact on Daylighting System Performance

Jean-Louis Scartezzini, Friedrich Linhart

The purpose of this work is the definition of a representative sky for the Geneva Lake Region (south-west Switzerland). A representative sky is a theoretical blended sky based on the relative occurrence of a subset of the 15 standard general skies suggeste ...

EPFL2009

Efficient Product Importance Sampling using Hierarchical Thresholding

We present an efficient method for importance sampling the product of multiple functions. Our algorithm computes a quick approximation of the product on-the-fly, based on hierarchical representations of the Local maxima and averages of the individual terms ...

2008

Interactive Selection of Optimal Fenestration Materials for Schematic Architectural Daylighting Design

Marilyne Andersen

Complex fenestration systems, such as prismatic and laser cut panels, are emerging as attractive options in architectural design thanks to their high potential to assist in energy and comfort issues. These systems can be used to redirect intense illuminati ...

Elsevier2008

Energieeffiziente Bürobeleuchtung - Das Projekt "Green Lighting"

Jean-Louis Scartezzini, Friedrich Linhart

The „Green Lighting“ project, started in 2006 at the Solar Energy and Building Physics Laboratory of Ecole Polytechnique Fédérale de Lausanne (EPFL), explores different ways to combine modern day- and artificial lighting technologies. The main objective of ...

BRENET2008

D-LITE: a new perspective for searching and selecting light-control technologies as a designer

Marilyne Andersen

Even though a large variety of innovative façade technologies has been developed to refine the control of solar radiation and increase the amount of useful natural illumination, their effective implementation in buildings is still uncommon. Increasing the ...

2008

Comparing physical and virtual methods for daylight performance modelling including complex fenestration systems

Anothai Thanachareonkit

Physical or virtual models are commonly employed to visualize the conceptual ideas of architects, lighting designers and daylighting researchers. The models are also used to assess the daylighting performance of their buildings, particularly when Complex F ...

EPFL2008

Making Background Subtraction Robust to Sudden Illumination Changes

Pascal Fua, Christoph Strecha, Julien Pilet

Modern background subtraction techniques can handle gradual illumination changes but can easily be confused by rapid ones. We propose a technique that overcomes this limitation by relying on a statistical model, not of the pixel intensities, but of the ill ...

Springer-Verlag New York, Ms Ingrid Cunningham, 175 Fifth Ave, New York, Ny 10010 Usa2008

Directional emission control and increased light extraction in GaN photonic crystal light emitting diodes

Elison de Nazareth Matioli

Limitations in extraction efficiency of gallium nitride (GaN) photonic crystal (PhC) light emitting diodes (LEDs) are addressed by implementing an LED design using both two-dimensional PhCs in-plane and index guiding layers (IGLs) in the vertical direction ...

American Institute of Physics2008

SIPRIUS - Système d'indicateurs pour les projets de régénération de friches urbaines

La régénération des friches urbaines constitue un potentiel intéressant en matière de densification à l’intérieur du tissu déjà bâti. Si, depuis une dizaine d’années, le démarrage d’un certain nombre de projets de ce type est observé en Europe, force est c ...

2007

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