Results 31 to 40 of about 715 (188)

Deformed relativistic kinematics on curved spacetime: a geometric approach

European Physical Journal C: Particles and Fields, 2022
Deformed relativistic kinematics have been considered as a way to capture residual effects of quantum gravity. It has been shown that they can be understood geometrically in terms of a curved momentum space on a flat spacetime. In this article we present
Christian Pfeifer, José Javier Relancio
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Using connectomics for predictive assessment of brain parcellations

NeuroImage, 2021
The organization of the human brain remains elusive, yet is of great importance to the mechanisms of integrative brain function. At the macroscale, its structural and functional interpretation is conventionally assessed at the level of cortical units ...
Kristoffer J. Albers, Karen S. Ambrosen, Matthew G. Liptrot, Tim B. Dyrby, Mikkel N. Schmidt, Morten Mørup   +5 more
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A new twist on the geometry of gravitational plane waves

Journal of High Energy Physics, 2017
The geometry of twisted null geodesic congruences in gravitational plane wave spacetimes is explored, with special focus on homogeneous plane waves.
Graham M. Shore
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A SAR-GMTI Approach Aided by Online Knowledge With an Airborne Multichannel Quad-Pol Radar System

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
In the complicated geographical environment, there will be a seriously deleterious effect to the performance of synthetic aperture radar (SAR)-ground moving target indication (SAR-GMTI) system, because it is difficult to obtain the homogeneous training ...
Chaolei Han, Zhiwei Yang, Guisheng Liao, Qingjun Zhang, Shun He, Huajian Xu   +5 more
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On Surfaces of Exceptional Lorentzian Lie Groups with a Four-Dimensional Isometry Group

Mathematics
In total, geodesic surfaces and their generalizations, namely totally umbilical and parallel surfaces, are well-known topics in Submanifold Theory and have been intensively studied in three-dimensional ambient spaces, both Riemannian and Lorentzian.
Giovanni Calvaruso, Lorenzo Pellegrino
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Generalizing the coupling between geometry and matter: $$f\left( R,L_m,T\right) $$ f R , L m , T gravity

European Physical Journal C: Particles and Fields, 2021
We generalize and unify the $$f\left( R,T\right) $$ f R , T and $$f\left( R,L_m\right) $$ f R , L m type gravity models by assuming that the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar R, of the trace of the energy ...
Zahra Haghani, Tiberiu Harko
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Minimal Maslov number of R-spaces canonically embedded in Einstein-Kähler C-spaces

Complex Manifolds, 2019
An R-space is a compact homogeneous space obtained as an orbit of the isotropy representation of a Riemannian symmetric space. It is known that each R-space has the canonical embedding into a Kähler C-space as a real form, and thus a compact embedded ...
Ohnita Yoshihiro
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Rapid response to the M$_{\protect \rm w}$ 4.9 earthquake of November 11, 2019 in Le Teil, Lower Rhône Valley, France

Comptes Rendus. Géoscience, 2021
On November 11, 2019, a M$_{\mathrm{w}}$ 4.9 earthquake hit the region close to Montelimar (lower Rhône Valley, France), on the eastern margin of the Massif Central close to the external part of the Alps.
Cornou, Cécile, Ampuero, Jean-Paul, Aubert, Coralie, Audin, Laurence, Baize, Stéphane, Billant, Jérémy, Brenguier, Florent, Causse, Mathieu, Chlieh, Mohamed, Combey, Andy, de Michele, Marcello, Delouis, Bertrand, Deschamps, Anne, Ferry, Matthieu, Foumelis, Michalis, Froment, Bérénice, Gélis, Céline, Grandin, Raphaël, Grasso, Jean-Robert, Hannouz, Estelle, Hok, Sébastien, Jung, Axel, Jolivet, Romain, Langlais, Mickaël, Langlaude, Philippe, Larroque, Christophe, Leloup, Philippe Hervé, Manchuel, Kevin, Marconato, Léo, Maron, Christophe, Mathot, Emmanuel, Maufroy, Emeline, Mercerat, Diego, Metois, Marianne, Nayman, Emmanuelle, Pondaven, Ildut, Provost, Ludmila, Régnier, Julie, Ritz, Jean-François, Rivet, Diane, Schlupp, Antoine, Sladen, Anthony, Voisin, Christophe, Walpersdorf, Andrea, Wolynieck, David, Allemand, Pascal, Beck, Elise, Bertrand, Etienne, Bertrand, Véronique, Briole, Pierre, Brunel, Didier, Cavalié, Olivier, Chèze, Jérôme, Courboulex, Françoise, Douste-Bacque, Isabelle, Dretzen, Rémi, Giampietro, Tiziano, Godano, Maxime, Grandjean, Philippe, Grunberg, Marc, Guerin, Gauthier, Guillot, Stéphane, Haber, Elias El, Hernandez, Alain, Jomard, Hervé, Lasserre, Cécile, Liang, Chao, Lior, Itzhak, Martin, Xavier, Mata, Daniel, Menager, Marine, Mercier, Antoine, Mordret, Aurélien, Oral, Elif, Paul, Anne, Peix, Fabrice, Pequegnat, Catherine, Pernoud, Michel, Satriano, Claudio, Sassi, Rihab, Schaming, Marc, Sellier, Valérie, Sira, Christophe, Socquet, Anne, Sue, Christian, Trilla, Aurélie, Vallée, Martin, van den Ende, Martijn, Vernant, Philippe, Vial, Benjamin, Weng, Huihui   +90 more
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Hopf fibrations and totally geodesic submanifolds [PDF]

, 2023
We classify totally geodesic submanifolds in Hopf-Berger spheres, which constitute a special family of homogeneous spaces diffeomorphic to spheres constructed via Hopf fibrations.
Rodríguez-Vázquez, Alberto, Olmos, Carlos E.   +1 more
core  

Transient Dynamics and Propagation of Voltage and Frequency Fluctuations in Transmission Grids

IEEE Access, 2023
The energy transition towards increased electric power production from renewable energy (RE) resources creates new challenges to ensure the stability of power grids. In conventional power grids voltage fluctuations can be controlled locally.
Kosisochukwu P. Nnoli, Fahrudin Delic, Stefan Kettemann   +2 more
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