Results 81 to 90 of about 22,193,544 (297)

One-Dimensional Relativistic Self-Gravitating Systems

open access: yesEntropy
One of the oldest problems in physics is that of calculating the motion of N particles under a specified mutual force: the N-body problem. Much is known about this problem if the specified force is non-relativistic gravity, and considerable progress has ...
Robert B. Mann
doaj   +1 more source

Computational Structure of the N-Body Problem [PDF]

open access: yesSIAM Journal on Scientific and Statistical Computing, 1989
Summary: This work considers tree algorithms for the N-body problem where the number of particles is on the order of a million. The main concern of this work is the organization and performance of these computations on parallel computers. This work introduces a formulation of the N-body problem as a set of recursive equations based on a few elementary ...
openaire   +1 more source

Integrating an N-Body Problem with SDC and PFASST [PDF]

open access: yes, 2014
Vortex methods for the Navier–Stokes equations are based on a Lagrangian particle discretization, which reduces the governing equations to a first-order initial value system of ordinary differential equations for the position and vorticity of N particles.
Speck, R   +6 more
openaire   +2 more sources

A Numerical Contribution to the Hierarchical Three-Body Problem [PDF]

open access: yes, 2022
The aim of this thesis is to provide a numerical investigation of the motions of the planar hierarchical three body problem, that we will regard as a perturbation of the planar two centre problem.
Legnaro, Edoardo
core  

Factors Associated With the Rising Trend in Self‐Reported Cognitive Disability Among U.S. Adults Aged 18–39 From 2013–2024

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Building on our prior Behavioral Risk Factor Surveillance System analysis identifying adults aged 18–39 as the primary driver of the national increase in self‐reported cognitive disability, we examined factors associated with this rise using 2013–2024 U.S. BRFSS data. Methods We analyzed U.S.
Adam de Havenon   +9 more
wiley   +1 more source

On the stability of displaced two-body lunar orbits [PDF]

open access: yes, 2010
In a prior study, a methodology was developed for computing approximate large displaced orbits in the Earth-Moon circular restricted three-body problem (CRTBP)by the Moon-Sail two-body problem.
Simo, Jules, McInnes, Colin R.
core   +3 more sources

On Parallel and Distributed N-Body Simulations

open access: yesMathematics
The N-body problem is a classic problem involving a system of N discrete bodies mutually interacting in a dynamical system. At any moment in time there are N(N−1)/2 such interactions occurring.
Alexander Brandt
doaj   +1 more source

Deep Learning Pose Estimation for Phenotyping of Co‐Occurring Hyperkinetic Movement Disorders

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore whether routine outpatient video combined with deep learning‐based pose estimation and clinically interpretable kinematic features can support multi‐label phenotyping of co‐occurring hyperkinetic movement disorders (HMDs).
Laura Cif   +17 more
wiley   +1 more source

C-cross products and a generalized mechanical N-body problem

open access: yesElectronic Journal of Differential Equations, 2000
For each finite dimensional real vector space X we construct a C*-algebra A graded by the lattice of all subspaces of X and we compute its quotient with respect to the algebra of compact operators.
Mondher Damak, Vladimir Georgescu
doaj  

Exemplos de configurações centrais planares encaixantes

open access: yesRevista Brasileira de Ensino de Física
Neste artigo estudamos configurações centrais planares encaixantes para o problema de n corpos em mecânica celeste quando n = 4, n = 8 e n = 12. Determinamos condições suficientes para a existência de tais configurações com os corpos nos vértices de ...
Antonio Carlos Fernandes   +2 more
doaj   +1 more source

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