Results 81 to 90 of about 801 (189)

The Ricci flow and the early universe

Annals of Physics, 2023
A framework of quantum spacetime reference frame is proposed and reviewed, in which the quantum spacetime at the Gaussian approximation is deformed by the Ricci flow. At sufficient large scale, the Ricci flow not only smooths out local small irregularities making the universe a homogeneous and isotropic Friedmann-Robertson-Walker metric, but also ...
openaire   +3 more sources

A note on the Cotton flow and the Ricci flow for three-manifolds, and the Hořava–Lifshitz gravity

European Physical Journal C: Particles and Fields
We consider the more general geometrical flow in the space of metrics for three-manifolds that consists of a combination of two flows, the Cotton flow and the Ricci flow; by playing a fundamental role in the detailed balance principle of the four ...
R. Cartas-Fuentevilla, A. Herrera-Aguilar, J. L. A. Calvario-Acocal   +2 more
doaj   +1 more source

A local singularity analysis for the Ricci flow and its applications to Ricci flows with bounded scalar curvature. [PDF]

Calc Var Partial Differ Equ, 2022
Buzano R, Di Matteo G.
europepmc   +1 more source

A Complexity‐Based Approach to Migration Policy Change: The Case of the German Residence Act

Regulation &Governance, EarlyView.
ABSTRACT This paper adapts and applies existing indicators to measure the complexity of German migration policy over time. Building on recent scholarship that conceptualizes migration policy as multidimensional, I adapt a measurement strategy from the EUPLEX Project to capture three key components of regulatory complexity: structural, linguistic, and ...
Pau Palop‐García
wiley   +1 more source

Mapping Organized Crime as a Stakeholder: A Risk‐Based and Responsive Governance Perspective

Regulation &Governance, EarlyView.
ABSTRACT Organized crime (OC) can influence firms through coercion, collusion, financial ties, and supply‐chain relationships, yet these interactions remain underexamined in stakeholder theory. This article conceptualizes organized crime as an analytically relevant but non‐normatively legitimate stakeholder and develops a risk‐based framework combining
Giovanni Scirè, Enzo Bivona
wiley   +1 more source

Determining properties of human‐induced pluripotent stem cell‐derived cardiomyocytes using spatially resolved electromechanical metrics

The Journal of Physiology, EarlyView.
Abstract figure legend In this study, we use human‐induced pluripotent stem cell‐derived cardiomyocyte (hiPSC‐CM) experiments and computational modelling to identify the mechanism of action of drug compounds. In the hiPSC‐CM experiments, optical measurements of cell collections are recorded in the baseline case and after drug exposure.
Karoline Horgmo Jæger, Verena Charwat, Kevin E. Healy, Samuel Wall, Aslak Tveito   +4 more
wiley   +1 more source

Remarks on the Extension of the Ricci Flow [PDF]

Journal of Geometric Analysis, 2012
9 pages, to appear in Journal of Geometric ...
openaire   +3 more sources

Dark energy and dark matter configurations for wormholes and solitionic hierarchies of nonmetric Ricci flows and $$F(R,T,Q,T_{m})$$ F ( R , T , Q , T m ) gravity

European Physical Journal C: Particles and Fields
We extend the anholonomic frame and connection deformation method, AFCDM, for constructing exact and parametric solutions in general relativity, GR, to geometric flow models and modified gravity theories, MGTs, with nontrivial torsion and nonmetricity ...
Laurenţiu Bubuianu, Sergiu I. Vacaru, Elşen Veli Veliev, Assel Zhamysheva   +3 more
doaj   +1 more source

The anholonomic frame and connection deformation method for constructing off-diagonal solutions in (modified) Einstein gravity and nonassociative geometric flows and Finsler–Lagrange–Hamilton theories

European Physical Journal C: Particles and Fields
This article is a status report on the anholonomic frame and connection deformation method, AFCDM, for constructing generic off-diagonal exact and parametric solutions in general relativity, GR, relativistic geometric flows and modified gravity theories,
Laurenţiu Bubuianu, Julia O. Seti, Douglas Singleton, Panayiotis Stavrinos, Sergiu I. Vacaru, Elşen Veli Veliev   +5 more
doaj   +1 more source

“I think people's perception that her reading is good enough. That would be a worry to me.” Mother and child perspectives of school‐related reading for children with Down syndrome

Journal of Research in Special Educational Needs, Volume 26, Issue 4, October 2026.
Abstract There is growing interest in children's reading experiences, both volitional and those initiated by, or connected to, school‐related reading. However, the majority of this research focuses on the reading experiences of neurotypical children; limiting understanding and the potential to improve support for other groups of children.
Katie Cebula, Sarah McGeown
wiley   +1 more source