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Publications associées (54)

Authentication of documents and articles by moire patterns

The present invention relies on the moiré patterns generated when superposing a base layer made of base band patterns and a revealing line grating (revealing layer). The produced moiré patterns comprise an enlargement and a transformation of the individual ...

2004

Phytoextraction of heavy metals by hyperaccumulating and non hyperaccumulating plants

Claudia Cosio

Although phytoextraction using hyperaccumulating plants is seen as a promising technique, a lack of understanding of the basic physiological, biochemical, and molecular mechanisms involved in heavy metal hyperaccumulation prevents the optimization of the p ...

EPFL2004

On the contribution of local current density to neoclassical tearing mode stabilization

Olivier Sauter

Neoclassical tearing modes are driven by the reduction of bootstrap current inside the island due to the flattening of the pressure profile. This current perturbation enhances the magnetic perturbation responsible for the island formation. Therefore it is ...

2004

Making a Faster Cryptanalytic Time-Memory Trade-Off

Philippe Oechslin

In 1980 Martin Hellman described a cryptanalytic time-memory trade-off which reduces the time of cryptanalysis by using precalculated data stored in memory. This technique was improved by Rivest before 1982 with the introduction of distinguished points whi ...

2003

Global regularity of wave maps from $R^{3+1}$ to surfaces

Joachim Krieger

We consider Wave Maps with smooth compactly supported initial data of small (H) over dot (3/2)-norm from R3+1 to certain 2-dimensional Riemannian manifolds and show that they stay smooth globally in time. Our methods are based on the introduction of a glob ...

Springer Verlag2003

Cadmium desorption in sand

David Andrew Barry

Desorption of cadmium (Cd) from sand was studied by both batch and flow-through methods. Batch experiments were conducted at three pH values (5.5, 6.0 and 6.5). In each case, the amount of Cd desorbed was low compared with the quantity of Cd adsorbed previ ...

2002

Holographic read-only memory

Demetri Psaltis

We describe the three-dimensional holographic optical disc system for application as read-only memory. Several systems design issues are discussed including imaging optics, storage density, readout rate, and the alignment servo system. We demonstrate 40 bi ...

2000

Java for Teaching and Research

Martin Vetterli, Laurent Balmelli

This short report summarizes the contribution of the project 'Java for teaching and research'. A website has been created to allow interested users to download the material produced during the project. The site is reachable at http://lcavwww.epfl.ch/~balme ...

2000

Constitutive expression of a chimeric receptor that delivers IL-2/IL-15 signals allows antigen-independent proliferation of CD8+CD44high but not other T cells

Friedrich Beermann

We have prepared transgenic mice whose T cells constitutively express a chimeric receptor combining extracellular human IL-4R and intracellular IL-2Rbeta segments. This receptor can transmit IL-2/IL-15-like signals in response to human, but not mouse, IL-4 ...

2000

Surface Second Harmonic generation in the Characterization of Anodic Sulphide and Oxide Films on Hg1-xCdxTe (MCT)

Pierre-François Marie Brevet

Rotation anisotropy by second harmonic generation (SHG) is carried out on epitaxial Hg1−xCdxTe (MCT) and oxide- and sulphide-covered MCT surfaces and shows the fourfold symmetry pattern expected from the {100} surface (C4v symmetry). The uneven nature of t ...

1999

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