Publication

Cis selectivity of salt-free Wittig reactions: a "Leeward Approach" of the aldehyde at the origin?

Publications associées (33)

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Automated Motion LoD with Rigid Constraints

Daniel Thalmann, Junghyun Ahn

Motion LoD (Level of Detail) is a preprocessing technique that generates multiple details of captured motion by eliminating joints. This LoD technique is applied to movie, game or VR environments for the purpose of improving speed of crowd animation. So fa ...

2010

Contact mechanics at the nanoscale, a 3D multiscale approach

Jean-François Molinari, Guillaume Anciaux

We present a multiscale coupling method to address contact problems. The components of the model are a molecular dynamics engine, a finite element program and a coupling scheme. We validate the approach, first on Hertzian contact and then with a rough surf ...

2009

X-ray structure of a pentameric ligand-gated ion channel in an apparently open conformation

Pentameric ligand-gated ion channels from the Cys-loop family mediate fast chemo-electrical transduction, but the mechanisms of ion permeation and gating of these membrane proteins remain elusive. Here we present the X-ray structure at 2.9 A resolution of ...

Nature Publishing Group2008

Ultrasonic monolithic piezoelectric multi DOF actuators for mobile microrobots

Jean-Marc Breguet, Walter Driesen, Tomas Cimprich

We propose a new type of “hybrid” ultrasonic driving principle for our monolithic piezoelectric actuators, which consist of simple electrode patterning on a PZT ceramic substrate The operating principle of the proposed USM is based on the conversion of ell ...

2006

Vehicle for rugged terrain

Roland Siegwart, Michel Lauria

The invention concerns a vehicle whereof the rigid body (1, 2, 4) comprises the front element (20) forming the rear element of a deformable articulated quadrilateral (17, 18, 19, 20). The element (17) is mounted in the extension of the arm (15) linked to t ...

2001

Kinematic control of the mass properties of redundant articulated bodies

Ronan Boulic

In this paper we show how the mass properties of an articulated body, such as its center of mass and its moments of inertia, may be manipulated like any conventional end effector, with well-known iterative, numerical techniques. Within our interactive simu ...

Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ, USA2000

Anatomic modeling of deformable human bodies

Daniel Thalmann

We propose a method to simulate human bodies based on anatomy concepts. We believe that the closer our model is to reality, the better our results will be. Using this approach, we are developing our human representation. Our model is divided into three lay ...

2000

Three-Dimensional Motion Estimation of Objects for Video Coding

Luciano Sbaiz

Three-dimensional (3-D) motion estimation is applied to the problem of motion compensation for video coding. We suppose that the video sequence consists of the perspective projections of a collection of rigid bodies which undergo a rototranslational motion ...

1998

A Pyramid Approach to Subpixel Registration Based on Intensity

Michaël Unser, Philippe Thévenaz

We present an automatic sub-pixel registration algorithm that minimizes the mean square difference of intensities between a reference and a test data set, which can be either tri-dimensional (3-D) volumes or bi-dimensional (2-D) images. It uses spline proc ...

IEEE1998

X-ray imaging of stress and strain of diamond, iron, and tungsten at megabar pressures

Philippe Gillet, James Badro

Synchrotron x-ray imaging and stress measurements of diamond-anvil cell gaskets revealed large elastic strains at the diamond tip at a pressure of 300 gigapascals. The diamond, generally considered a rigid body, bent 16 degrees over a distance of 300 micro ...

1997