Zobrazeno 1 - 10
of 8 831
pro vyhledávání: '"ANDRES, J."'
Autor:
Moreno, Andrés J., Portilla, Luis E.
We study homogeneous instantons on the seven dimensional Stiefel manifold V in the context of G2 and Sasakian geometry. According to the reductive decomposition of V we provide an explicit description of all invariant G2 and Sasakian structures. In p
Externí odkaz:
http://arxiv.org/abs/2406.06753
Autor:
Moreno, Andrés J., Saavedra, Julieth
In this work, we approach the Laplacian coflow of a coclosed $G_2$-structure $\varphi$ using the formulae for the irreducible $G_2$-decomposition of the Hodge Laplacian and the Lie derivative of the Hodge dual $4$-form of $\varphi$. In terms of this
Externí odkaz:
http://arxiv.org/abs/2304.14930
We study the G$_2$-instanton condition for a family of metric connections arisen from the characteristic connection, on $7$-dimensional $2$-step nilpotent Lie groups with left-invariant coclosed G$_2$-structures. According to the dimension of the com
Externí odkaz:
http://arxiv.org/abs/2304.04284
Autor:
de Wit, Xander M., Boot, Wouter J. M., Madonia, Matteo, Guzmán, Andrés J. Aguirre, Kunnen, Rudie P. J.
Publikováno v:
Phys. Rev. Fluids 8, 073501 (2023)
In confined rotating convection, a strong zonal flow can develop close to the side wall with a modal structure that precesses anti-cyclonically (counter to the applied rotation) along the side wall. It is surmised that this is a robust non-linear evo
Externí odkaz:
http://arxiv.org/abs/2303.00469
Autor:
Bhuvana Lakkasetter Chandrashekar, Claudia C. Biguetti, Alexandra Arteaga, Andres J. Miramontes, Evelin Rios, Danieli C. Rodrigues
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-13 (2024)
Abstract Cement mediated peri-implantitis accounts for 1.9–75% of dental implant failures associated with peri-implant diseases. This study evaluated the biological impact of dental cements on osseointegrated implants using Lewis rats. Twenty-two r
Externí odkaz:
https://doaj.org/article/1bd21ec0309c4799a986fc33e42f1bb2
We report flow measurements in rotating Rayleigh--B\'enard convection in the rotationally-constrained geostrophic regime. We apply stereoscopic particle image velocimetry to measure the three components of velocity in a horizontal cross-section of a
Externí odkaz:
http://arxiv.org/abs/2212.10991
Autor:
Moreno, Andrés J.
Publikováno v:
Differential Geometry and its Applications volume 91, December 2023, 102060
We consider left-invariant $G_2$-structures on $7$-dimensional almost Abelian Lie groups. Also, we characterise the associated torsion forms and the full torsion tensor according to the Lie bracket $A$ of the corresponding Lie algebra. In those terms
Externí odkaz:
http://arxiv.org/abs/2212.05168
We develop an abstract theory of flows of geometric $H$-structures, i.e., flows of tensor fields defining $H$-reductions of the frame bundle, for a closed and connected subgroup $H\subset SO(n)$, on any connected and oriented $n$-manifold with suffic
Externí odkaz:
http://arxiv.org/abs/2211.05197
Autor:
Alison N. McRae, Alexander L. Ticho, Yuanhang Liu, Maria Laura Ricardo-Silgado, Nothando N. Mangena, Fauzi Feris Jassir, Daniel Gonzalez-Izundegui, Gerardo Calderon, Fariborz Rakhshan Rohakhtar, Vernadette Simon, Ying Li, Cadman Leggett, Daniela Hurtado, Nicholas LaRusso, Andres J. Acosta
Publikováno v:
EBioMedicine, Vol 107, Iss , Pp 105283- (2024)
Summary: Background: Gut L-type enteroendocrine cells (EECs) are intestinal chemosensory cells that secrete satiety hormones GLP-1 and PYY in response to activation of G-protein coupled receptors (GPCRs) by luminal components of nutrient digestion an
Externí odkaz:
https://doaj.org/article/c9f0174c06574574b83f30365b0f7ba4