Concept

Collision inélastique

Publications associées (93)

Zircon SHRIMP dating of granite from Qaidamshan, NW China

Zircon SHRIMP dating from Qaidamshan granite shows that the granite age is 446 Ma, similar to that of eclogite in the LW belt. We think that both granite and eclogite may be formed at different stages during tectonic evolution of this area. Together with o ...

2002

Primary damage formation in molybdenum: a computer simulation study

The primary damage formation in Mo is investigated using molecular dynamics (MD) simulation with embedded-defect (ED) and embedded-atom method (EAM) interatomic potentials. The former is similar in spirit to the latter but includes an approximate treatment ...

2002

Real-Time Obstacle Avoidance for Polygonal Robots with a Reduced Dynamic Window

Roland Siegwart, Nicola Tomatis, Jan Persson, Kai Oliver Arras

In this paper we present an approach to obstacle avoidance and local path planning for polygonal robots. It decomposes the task into a model stage and a planning stage. The model stage accounts for robot shape and dynamics using a reduced dynamic window. T ...

2002

Dynamic triangulations for efficient 3D simulation of granular materials

Jean-Albert Ferrez

Granular materials are omnipresent in many fields ranging from civil engineering to food, mining and pharmaceutical industries. Often considered a fourth state of matter, they exhibit specific phenomena such as segregation, arching effects, pattern formati ...

EPFL2001

Neoclassical conductivity and bootstrap current formulas for general axisymmetric equilibria and arbitrary collisionality regime

Olivier Sauter

Expressions for the neoclassical resistivity and the bootstrap current coefficients in terms of aspect ratio and collisionality are widely used in simulating toroidal axisymmetric equilibria and transport evolution. The formulas used are in most cases base ...

1999

Collisions and Chemistry of Super-Excited Molecules: Experiments Using the PUMP - DUMP - PROBE Technique

Marcel Drabbels

Modern lasers now routinely allow experiments where large populations of highly excited molecules can be prepared with perfect quantum state selection. In a sense, the laser has become the physical chemist’s synthetic tool, allowing “optical distillation” ...

1999

Parity-resolved state-to-state cross sections for inelastic scattering of NO X (2)Pi(1/2) (upsilon = 20, J = 0.5, elf) from He: A comparison between crossed molecular beams experiments and ab initio theory

Marcel Drabbels

Relative state-to-state cross sections for inelastic collisions between NO X (2) Pi(1/2) (upsilon = 20, J = 0.5, e or f) and He have been determined in a crossed molecular beam setup at a collision energy of 195 cm(-1). Efficient initial state preparation ...

American Chemical Society1997

Hidden collisions on DSS

Serge Vaudenay

We explain how to forge public parameters for the Digital Signature Standard with two known messages which always produce the same set of valid signatures (what we call a collision). This attack is thwarted by using the generation algorithm suggested in th ...

1996

A 3-D Fokker-Planck Code for Studying Parallel Transport in Tokamak Geometry with Arbitrary Collisionalities and Application to Neoclassical Resistivity

Olivier Sauter

A new 3-D Fokker-Planck code, CQL(parallel-to), which solves the Fokker-Planck equations with two velocity coordinates and one spatial coordinate parallel to the magnetic field lines B/B, has been developed. This code enables us to model the parallel trans ...

1994

THE PHENOMENOLOGY OF COLORED SCALARS

We study the phenomenology of light scalar quarks and the properties of a new family of hadrons containing such quarks in the framework of QCD taking into account non-perturbative effects caused by a possible existence of the condensate of the colored scal ...

1984

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