Concept

Electrical ballast

Related publications (32)

Optimal integration of daylighting and electric lighting systems using non-imaging optics

Jean-Louis Scartezzini, Friedrich Linhart

Electric lighting is responsible for a significant fraction of electricity consumption within non-residential buildings. Making daylight more available in office and commercial buildings can lead as a consequence to important electricity savings, as well a ...

2007

Ultra-thin nanograin polysilicon devices for hybrid CMOS-NANO integrated circuits

Serge Ecoffey

The aim of this research is to develop and to evaluate devices and circuits performances based on ultrathin nanograin polysilicon wire (polySiNW) dedicated to room temperature operated hybrid CMOS-"nano" integrated circuits. The proposed polySiNW device is ...

EPFL2007

Ultra Low Power Subthreshold MOS Current Mode Logic Circuits Using a Novel Load Device Concept

Seyed Armin Tajalli, Eric Vittoz, Yusuf Leblebici

This article presents a novel and robust approach for implementing ultra-low power MOS current mode logic (MCML) circuits. To operate at very low bias currents, a simple and compact high resistance load device has been introduced. Operating in subthreshold ...

2007

Water drops and cavitation bubbles in microgravity

Mohamed Farhat, Nicolas Dorsaz, Claude Nicollier, Danail Obreschkow, Philipp Kobel, Aurèle De Bosset

We realized an experimental setup to study the dynamics of cavitation bubbles inside spherical water drops produced in microgravity (8th Student Parabolic Flight Campaign, European Space Agency ESA). Water volumes of up to 8 ml (25 mm diameter) were expell ...

2005

Development of low-temperature thick-film materials for piezoresistive sensors

Peter Ryser, Claudio Grimaldi, Thomas Maeder, Caroline Jacq, Sonia Vionnet Menot

Thick-film materials are very advantageous for piezoresistive pressure and force sensors because of ease of processing, reliability and low cost. However, their applications are restricted because standard thick-film materials require processing temperatur ...

2005

Design and Control of a Supercapacitor Storage System for Traction Applications

Alfred Rufer, Philippe Barrade

The storage system in this paper is made of supercapacitors. The main goal is to ensure an efficient energy management in a series hybrid vehicle, even if braking resistors are still needed. Design considerations are discussed. In particular the influence ...

2005

Free carriers in nanocrystalline titanium dioxide thin films

Simon Springer

This thesis analyzes the properties of heavily doped nanocrystalline titanium dioxide. Thin films were deposited by magnetron sputtering with either water vapor as reactive gas or a periodically interrupted oxygen supply. The samples were at the same time ...

EPFL2004

Properties of thick-film resistors on dielectric and metal substrates for piezoresistive sensors

Peter Ryser, Claudio Grimaldi, Thomas Maeder

In this paper, the resistive and piezoresistive properties of a commercial resistive composition (Du Pont 2041), often used for strain-gauge applications, are examined on several dielectric compositions, which themselves are deposited onto various ceramic ...

2003

Configurable Front-End Converters for Multicurrent Locomotives Operated on 16 2/3 Hz AC and 3 kV DC Systems

Alfred Rufer, Christophe Chabert

A configurable converter topology is presented as front-end converter for a locomotive that can be operated as well on a high voltage ac-system as on a medium voltage dc-system. The configurable converter is realized on the base of a multilevel chain, wher ...

2003

A low-power micromachined MOSFET gas sensor

Nico de Rooij, Danick Briand

This paper reports on the design, fabrication, and characterization of the first low-power consumption MOSFET gas sensor. The novel MOSFET array gas sensor has been fabricated using anisotropic bulk silicon micromachining. A heating resistor, a diode used ...

2000

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