Results 31 to 40 of about 135,634 (231)

Non-relativistic gravity theories in four spacetime dimensions

open access: yesJournal of High Energy Physics, 2023
In this work we present a non-relativistic gravity theory defined in four spacetime dimensions using the MacDowell-Mansouri geometrical formulation. We obtain a Newtonian gravity action which is constructed from the curvature of a Newton-Hooke version of
Patrick Concha   +2 more
doaj   +1 more source

Modified inertia as nonconservative Newtonian dynamics [PDF]

open access: yesPhysical Review D, 2021
Modified Newtonian dynamics by Milgrom is a paradigm for explaining the rotation curves of spiral galaxies and various other large scale structures. This paradigm includes several different theories. Here we present Milgrom's modified inertia (MI) theory in terms of a simple and tractable non-conservative Newtonian dynamics, which is useful in ...
Ahmad Shariati, Nosratollah Jafari
openaire   +2 more sources

Modified Newtonian Gravity as an Alternative to the Dark Matter Hypothesis

open access: yesGalaxies, 2017
[-5]The applications of Newtonian dynamics in galactic scales have shown that the inverse square law is incompatible with the amount of visible mass in the form of stars and molecular clouds.
Luis Acedo
doaj   +1 more source

Comparison of Newtonian and Non-newtonian Fluid Models in Blood Flow Simulation in Patients With Intracranial Arterial Stenosis

open access: yesFrontiers in Physiology, 2021
BackgroundNewtonian fluid model has been commonly applied in simulating cerebral blood flow in intracranial atherosclerotic stenosis (ICAS) cases using computational fluid dynamics (CFD) modeling, while blood is a shear-thinning non-Newtonian fluid.
Haipeng Liu   +13 more
doaj   +1 more source

Non-Newtonian Effects of Blood Flow on Hemodynamics in Pulmonary Stenosis: Numerical Simulation

open access: yesApplied Bionics and Biomechanics, 2023
This paper aims to explore the construction of an individualized pulmonary artery stenosis model based on computed tomography (CT) images. The stenosis model is simulated using a porous medium, and the numerical simulation is carried out by computational
Fan He, Xinyu Wang, Lu Hua, Tingting Guo
doaj   +1 more source

Rheology of an Inverted Cholesteric Droplet under Shear Flow

open access: yesFluids, 2018
The dynamics of a quasi two-dimensional isotropic droplet in a cholesteric liquid crystal medium under symmetric shear flow is studied by lattice Boltzmann simulations.
Federico Fadda   +4 more
doaj   +1 more source

Newtonian Image Understanding: Unfolding the Dynamics of Objects in Static Images

open access: yes, 2015
In this paper, we study the challenging problem of predicting the dynamics of objects in static images. Given a query object in an image, our goal is to provide a physical understanding of the object in terms of the forces acting upon it and its long ...
Bagherinezhad, Hessam   +3 more
core   +1 more source

Dynamics of a non-autonomous incompressible non-Newtonian fluid with delay [PDF]

open access: yes, 2017
We first study the well-posedness of a non-autonomous incompressible non-Newtonian fluid with delay. The existence of global solution is obtained by classical Galerkin approximation and the energy method.
Caraballo Garrido, Tomás   +2 more
core   +1 more source

Pseudo-Newtonian planar circular restricted 3-body problem

open access: yes, 2016
We study the dynamics of the planar circular restricted three-body problem in the context of a pseudo-Newtonian approximation. By using the Fodor-Hoenselaers-Perj\'es procedure, we perform an expansion in the mass potential of a static massive spherical ...
Dubeibe, F. L.   +2 more
core   +1 more source

From Information Geometry to Newtonian Dynamics [PDF]

open access: yes, 2007
Newtonian dynamics is derived from prior information codified into an appropriate statistical model. The basic assumption is that there is an irreducible uncertainty in the location of particles so that the state of a particle is defined by a probability
Adom Giffin   +6 more
core   +3 more sources

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