Concept

Système de management de la qualité

Publications associées (299)

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Towards Probabilistic Estimation of Quality of Online Services

Karl Aberer

Accurate estimation of quality of online services is both an important and difficult problem, since a service has many interdependent quality attributes influenced by several contextual factors. It is even more challenging as quality ratings come from sour ...

IEEE2009

Fusion Schemes for Multiview Distributed Video Coding

Thomas Maugey

Distributed video coding performances strongly depend on the side information quality, built at the decoder. In multi-view schemes, correlations in both time and view directions are exploited, obtaining in general two estimations that need to be merged. Th ...

2009

Spatial Error Concealment in Ad-hoc Audio Conferencing Systems

Reza Parhizkar

In this work we consider an ad-hoc audio conferensing system based on VoIP services in which the participants connect to the conference using mobile communication devices with wireless connectivity. To overcome possible quality problems in the wireless lin ...

2009

Gallium arsenide p-i-n radial structures for photovoltaic applications

Michael Graetzel, Martin Heiss, Carlo Colombo

Gallium arsenide p-i-n radial junctions were fabricated by molecular beam epitaxy. The current-voltage characteristics of single nanowires were measured in the dark and under various illumination conditions including 1.5 AM. The total efficiency was 4.5%. ...

2009

Gallium arsenide p-i-n radial structures for photovoltaic applications

Michael Graetzel, Anna Fontcuberta i Morral, Martin Heiss, Carlo Colombo

American Institute of Physics2009

Compressed sensing for radio interferometry: spread spectrum imaging techniques

Pierre Vandergheynst, Yves Wiaux, Gilles Puy

We consider the problem of reconstruction of astrophysical signals probed by radio interferometers with baselines bearing a non-negligible component in the pointing direction. The visibilities measured essentially identify with a noisy and incomplete Fouri ...

2009

The strength of annealed, heat-strengthened and fully tempered float glass

Pieter Christian Louter

In the last two decades architectural glass has made an enormous leap from a secondary material to a material that combines structural and cladding roles. The structural role is a new and problematic one. In contrast to most other engineering materials the ...

Wiley-Blackwell2009

Linear Diversity-Embedding STBC: Design Issues and Applications

Suhas Diggavi

We design a novel class of space-time codes, called linear diversity-embedding space-time block codes (LDE-STBC) where a high-rate STBC is linearly superimposed on a high-diversity STBC without requiring channel knowledge at the transmitter. In applying th ...

2009

Design for a Sustainable Future

Marilyne Andersen

Organized around a holistic design approach, this class examined the synthetic relationship between performance and design in addressing issues of sustainability in the built environment. The workshop introduced the theories behind a resource-efficient bui ...

Lulu.com2009

MICROCRYSTALLINE SILICON SOLAR CELLS: EFFECT OF SUBSTRATE TEMPERATURE ON CRACKS

Christophe Ballif, Martin Python

Single junction microcrystalline silicon solar cells presently reach confirmed efficiencies up to 10.1%. Further improvement on device quality is now necessary to continuously increase the electrical performances of the solar cells. Zones of porous materia ...

2009