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Publications associées (323)

Robust Features for Frontal Face Authentication in Difficult Image Conditions

In this report we extend the recently proposed {DCT}-mod2 feature extraction technique (which utilizes polynomial coefficients derived from {2D} {DCT} coefficients obtained from horizontally & vertically neighbouring blocks) via the use of various windows ...

IDIAP2003

Two-Way Plots Based On Mixed Traces

Thomas Gsponer

The two-way plot is a well-known tool to visualize the fit of a two-way table. An additive fit can be represented by two sets of parallel traces, whose intersection ordinates equal the fitted values. Based on linear traces, a variety of other two-way plots ...

Bundesamt für Statistik2002

Quaternary ammonium polymer, its preparation, its use for separating biomolecules

Jutta Christine Wandrey

A linear water-soluble quaternary ammonium polymer having a homopolymeric chain of repeating unit of general formula (I):where each of R1 and R2 independently represents a member selected from the group consisting of linear or branched alkyl, hydroxyalkyl, ...

2002

The band structure of Z-like quantum wires

Marc-André Dupertuis, Daniel Marti

We analyze the electronic properties of quantum wires with a Z-like profile within four-band models for the valence band of a semiconductor of diamond and zinc blende type. Group-theoretical considerations show that the valence-band structure is doubly deg ...

2002

Segmentation of Natural Images Using Scale-Space Representations: A Linear and a Non-Linear Approach

Pierre Vandergheynst, Oscar Divorra Escoda

In general purpose computer vision systems, unsupervised image analysis is mandatory in order to achieve an automatic operation. In this paper a different approach to image segmentation for natural scenes is presented. Scale-Space representation is used to ...

IEEE2002

Rotational and torsional analysis of the OH-stretch third overtone in (CH3OH)-C-13

Thomas Rizzo

We record double resonance spectra of the 4nu(1) band of jet-cooled C-13-methanol using single rotational state selection in the nu(1) fundamental and subsequent promotion of the selected molecules to the fourth vibrational level. We then detect transition ...

2002

The dual role of functional pseudo-prolines for the design of novel SH3 ligands

Patricia Durieux

Pseudo-proline building blocks exert a dual functionality in enhancing and stabilizing the relevant polyproline II (PPII) conformation and increasing and optimizing van der Waals contacts and hydrogen bonding to the receptor mols. thus modifying affinity a ...

2001

MOMS: Maximal-Order Interpolation of Minimal Support

Michaël Unser, Philippe Thévenaz, Thierry Blu

We consider the problem of interpolating a signal using a linear combination of shifted versions of a compactly-supported basis function φ(x). We first give the expression of the φ's that have minimal support for a given accuracy (also known as "approximat ...

IEEE2001

Linear and non-linear plasma equilibrium responses on the JT-60U and TCV tokamaks

Jonathan Bryan Lister, Ashish Sharma

Although linear response models are useful for feedback controller design, their linear time-invariant properties cannot simulate the evolution of a full plasma discharge. A suitable code for this purpose is DINA, which has now been benchmarked against a c ...

2001

Radiative behavior of negatively charged excitons in CdTe-based quantum wells: A spectral and temporal analysis

Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, Victoria Ciulin

Using reflectivity and picosecond time-resolved photoluminescence, we have studied the intrinsic optical properties of negatively charged excitons in modulation doped CdTe quantum wells. In emission, we observe simultaneously a low energy exponential tail ...

2000

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