Results 91 to 100 of about 87,863 (252)

Cosmological Dynamics of Interacting Dark Energy and Dark Matter in f(Q)$f(Q)$ Gravity

Fortschritte der Physik, Volume 73, Issue 5, May 2025.
Abstract In this work, the behavior of interacting dark energy (DE) and dark matter (DM) within a model of f(Q)$f(Q)$ gravity is explored, employing the standard framework of dynamical system analysis. The power‐law f(Q)$f(Q)$ model is considered, incorporating two different forms of interacting DE and DM: 3αHρm$3\alpha H\rho _m$ and α3HρmρDE$\frac ...
Gaurav N. Gadbail, Simran Arora, Phongpichit Channuie, P. K. Sahoo   +3 more
wiley   +1 more source

TWO-BODY PROBLEM IN KALUZA-KLEIN MODELS WITH RICCI-FLAT INTERNAL SPACES

Odessa Astronomical Publications, 2013
We consider the dynamics of a two-body system in the model with additional spatial dimensions compactified on a Ricci-flat manifold. To define the gravitational field of a system and to construct its Lagrange function we use the weak-field approach.
Alexey Chopovsky
doaj   +1 more source

Critical lumpy black holes in AdSp×Sq

Journal of High Energy Physics, 2021
In this paper we study lumpy black holes with AdSp × S q asymptotics, where the isometry group coming from the sphere factor is broken down to SO(q).
Biel Cardona, Pau Figueras
doaj   +1 more source

Parallelism between locally conformal symplectic manifolds and contact manifolds [PDF]

arXiv, 2015
We give the parallelism between locally conformal symplectic manifolds and contact manifolds. We also give the generalization of exact contact manifolds.
arxiv  

Specific effects on kidneys relevant for performing a dietary cumulative risk assessment of pesticide residues

EFSA Journal, Volume 23, Issue 5, May 2025.
Abstract In consistency with the ‘EFSA‐SANTE Action Plan on Cumulative Risk Assessment for pesticides residues’ EFSA initiated a retrospective cumulative risk assessment (CRA) of the effects of pesticide residues on the kidneys. EFSA identified the following specific effects on kidneys of relevance for cumulative risk assessment: glomerular injury ...
European Food Safety Authority (EFSA), Anna F. Castoldi, Tamara Coja, Anna Lanzoni, Kyriaki Machera, Luc Mohimont, Camilla Recordati, Federica Crivellente   +7 more
wiley   +1 more source

Generalized Kenmotsu Manifolds [PDF]

Communications in Mathematics and Applications, v.7,no.4, 311-328 (2016), 2014
In 1972, K. Kenmotsu studied a class of almost contact Riemannian manifolds. Later, such a manifold was called a Kenmotsu manifold. This paper, we studied Kenmotsu manifolds with $(2n+s)$-dimensional $s-$contact metric manifold and this manifold, we have called generalized Kenmotsu manifolds. Necessary and sufficient condition is given for an almost $s-
arxiv  

Specific effects on liver relevant for performing a dietary cumulative risk assessment of pesticide residues

EFSA Journal, Volume 23, Issue 5, May 2025.
Abstract According to the ‘EFSA‐SANTE Action Plan on Cumulative Risk Assessment for pesticides residues’, EFSA initiated a retrospective cumulative risk assessment (CRA) of the effects of pesticide residues on the liver. For this CRA, EFSA identified the following liver‐specific effects in accordance with the International Harmonisation of Nomenclature
European Food Safety Authority (EFSA), Anna F. Castoldi, Tamara Coja, Anna Lanzoni, Kyriaki Machera, Luc Mohimont, Monica Nepal, Camilla Recordati, Federica Crivellente   +8 more
wiley   +1 more source

Selfsimilar Hessian manifolds [PDF]

arXiv, 2019
A selfsimiar manifold is a Riemannian manifold $\left(M,g\right)$ endowed with a homothetic vector field $\xi$. We characterize global selfsimilar manifolds and describe the structure of local selfsimilar manifolds. We prove that any selfsimilar manifold with a potential homothetic vector field is a conical Riemannian manifold or a Eucledean space.
arxiv  

Kummer-type constructions of almost Ricci-flat 5-manifolds

Annals of Global Analysis and Geometry, 2023
A smooth closed manifold $M$ is called almost Ricci-flat if $$\inf_g||\textrm{Ric}_g||_\infty\cdot \textrm{diam}_g(M)^2=0$$ where $\textrm{Ric}_g$ and $\textrm{diam}_g$ denote the Ricci tensor and the diameter of $g$ respectively and $g$ runs over all Riemannian metrics on $M$.
openaire   +2 more sources

Hodge loci associated with linear subspaces intersecting in codimension one

Mathematische Nachrichten, Volume 298, Issue 4, Page 1220-1229, April 2025.
Abstract Let X⊂P2k+1$X\subset \mathbf {P}^{2k+1}$ be a smooth hypersurface containing two k$k$‐dimensional linear spaces Π1,Π2$\Pi _1,\Pi _2$, such that dimΠ1∩Π2=k−1$\dim \Pi _1\cap \Pi _2=k-1$. In this paper, we study the question whether the Hodge loci NL([Π1]+λ[Π2])$\operatorname{NL}([\Pi _1]+\lambda [\Pi _2])$ and NL([Π1],[Π2])$\operatorname{NL ...
Remke Kloosterman
wiley   +1 more source