Concept
Quaternions et rotation dans l'espace
Publications associées (135)
A fast algorithm to find reduced hyperplane unit cells and solve N-dimensional Bezout's identities
Deformation twinning on a plane is a simple shear that transforms a unit cell attached to the plane into another unit cell equivalent by mirror symmetry or 180 degrees rotation. Thus, crystallographic models of twinning require the determination of the sho ...
INT UNION CRYSTALLOGRAPHY2021Linearized supergravity with a dynamical preferred frame
We study supersymmetric extension of the Einstein-aether gravitational model where local Lorentz invariance is broken down to the subgroup of spatial rotations by a vacuum expectation value of a timelike vector field called aether. Embedding aether into a ...
SPRINGER2021Survival of rotational alignment in H-2 scattering from Si(100)
We report a state-prepared, state-resolved study of rotational scattering of a diatomic molecule from a solid surface. Specifically, H-2 molecules with 80 meV kinetic energy are rotationally aligned in the j = 3 rotational state via stimulated Raman pumpin ...
AIP Publishing2021Instanton theory of ground-state tunneling splittings with general paths
Christophe Louis Joseph Jean-Luc Vaillant, Mihael Erakovic
We derive a multidimensional instanton theory for calculating ground-state tunneling splittings in Cartesian coordinates for general paths. It is an extension of the method by Mil'nikov and Nakamura [J. Chem. Phys. 115, 6881 (2001)] to include asymmetric p ...
2020Perceptual grouping leads to objecthood effects in the Ebbinghaus illusion
Michael Herzog, Aline Françoise Cretenoud, Einat Rashal
The Ebbinghaus illusion is argued to be a product of low-level contour interactions or a higher cognitive comparison process. We examined the effect of grouping on the illusion by manipulating objecthood, i.e., the degree to which an object is a cohesive p ...
2020Effect of periodic gas-puffs on drift-tearing modes in ADITYA/ADITYA-U tokamak discharges
The effect of a periodic train of short gas-puff pulses on the rotation frequency and amplitude of drift-tearing modes has been studied in ADITYA/ADITYA-U tokamak. The short gas puffs, injecting approximately similar to 10(17)-10(18) molecules of fuel gas ...
2020Effects of sedimentation, microgravity, hydrodynamic mixing and air-water interface on alpha-synuclein amyloid formation
Giovanni Dietler, Giovanni Longo, Francesco Simone Ruggeri, Jiangtao Zhou
The formation of amyloid fibrils is a characterizing feature of a range of protein misfolding diseases, including Parkinson's disease. The propensity of native proteins to form such amyloid fibril, both in vitro and in vivo, is highly sensitive to the surr ...
ROYAL SOC CHEMISTRY2020Spherical Convolutionnal Neural Networks: Empirical Analysis of SCNNs
Convolutional neural networks (CNNs) are powerful tools in Deep Learning mainly due to their ability to exploit the translational symmetry present in images, as they are equivariant to translations. Other datasets present different types of symmetries (e.g ...
2019Manipulating Topological Domain Boundaries in the Single-Layer Quantum Spin Hall Insulator 1T '-WSe2
Oleg Yazyev, Yixing Chen, Michele Pizzochero, Artem Pulkin, Feng Wang
We report the creation and manipulation of structural phase boundaries in the single-layer quantum spin Hall insulator 1T'-WSe2 by means of scanning tunneling microscope tip pulses. We observe the formation of one-dimensional interfaces between topological ...
2019Suprathermal electron driven fishbone instability in the TCV tokamak
Stefano Coda, Jonathan Graves, Laurie Porte, Antoine Pierre Emmanuel Alexis Merle, Joan Decker
Observations of fishbone oscillations driven by energetic electrons have been reported in several tokamaks, but experimental evidence of the interaction between electrons and the mode has remained limited. In the TCV tokamak, a state-of-the-art multi-chann ...
2019