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209 results on '"Iga, R."'

3. Fine Grain Body-Biasing: A strategy for asynchronous circuits

Author

Ferreira De Paiva Leite, Thiago, Iga, R., Engels, Sylvain, Possamai Bastos, Rodrigo, Fesquet, Laurent, Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés (TIMA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), STMicroelectronics [Crolles] (ST-CROLLES), European Project: 621221,EC:FP7:SP1-JTI,ENIAC-2013-2,THINGS2D0(2014), Techniques of Informatics and Microelectronics for integrated systems Architecture (TIMA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Fesquet, Laurent, and THINGS2DO - THINGS2D0 - - EC:FP7:SP1-JTI2014-01-01 - 2018-01-01 - 621221 - VALID

Subjects
[SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, PACS 85.42, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS
Abstract

Exhibition; International audience

Published
2018

6. Cylindrical anisotropic $��^{2}$ dynamos

Author

Avalos-Zu��iga, R., Xu, M., Stefani, F., Gerbeth, G., and Plunian, F.

Subjects
Physics::Fluid Dynamics, Physics::Space Physics, Fluid Dynamics (physics.flu-dyn), Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Physics::Geophysics, Geophysics (physics.geo-ph)
Abstract

We explore the influence of geometry variations on the structure and the time-dependence of the magnetic field that is induced by kinematic $��^{2}$ dynamos in a finite cylinder. The dynamo action is due to an anisotropic $��$ effect which can be derived from an underlying columnar flow. The investigated geometry variations concern, in particular, the aspect ratio of height to radius of the cylinder, and the thickness of the annular space to which the columnar flow is restricted. Motivated by the quest for laboratory dynamos which exhibit Earth-like features, we start with modifications of the Karlsruhe dynamo facility. Its dynamo action is reasonably described by an $��^{2}$ mechanism with anisotropic $��$ tensor. We find a critical aspect ratio below which the dominant magnetic field structure changes from an equatorial dipole to an axial dipole. Similar results are found for $��^{2}$ dynamos working in an annular space when a radial dependence of $��$ is assumed. Finally, we study the effect of varying aspect ratios of dynamos with an $��$ tensor depending both on radial and axial coordinates. In this case only dominant equatorial dipoles are found and most of the solutions are oscillatory, contrary to all previous cases where the resulting fields are steady., 15 pages, 8 figures

Published
2009
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