Results 51 to 60 of about 669,916 (261)

MEGASIM: Distribution and Detection of Earth Trojan Asteroids

open access: yesThe Astrophysical Journal
Using N -body simulation results from the MEGASIM data set, we present spatial distributions of Earth Trojan Asteroids and assess the detectability of the population in current and next-generation ground-based astronomical surveys.
Travis Yeager   +2 more
doaj   +1 more source

Adjacent Zero Communication Parallel Cloud Computing Method and Its System for N-Body Problem with Short-Range Interaction Domain Decomposition

open access: yesAdvances in Astronomy, 2016
Although parallel computing is used in the existing numerical solutions of N-body problem, tons of communications between N particles render the parallel efficiency extremely low.
Dingju Zhu
doaj   +1 more source

Feasibility and Tolerability of Performing Portable MRI for Neurological Disorders in an Outpatient Neurology Clinic: A Prospective Cohort

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Accessing brain magnetic resonance imaging (MRI) can be challenging, especially for underserved patients, which may lead to disparities in neurological diagnosis. Method This mixed‐methods study enrolled adults with one of four neurological disorders: mild cognitive impairment or dementia of the Alzheimer type, multiple sclerosis ...
Maya L. Mastick   +19 more
wiley   +1 more source

Vestibular Patient Journey: Insights From Vestibular Disorders Association (VeDA) Registry

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Vestibular symptoms impose a high burden of disability. Understanding real‐world diagnostic and treatment pathways can identify care gaps and guide interventions. We aimed to characterize symptom profiles, diagnostic trends, provider involvement, and treatment patterns in vestibular disorders.
Ali Rafati   +10 more
wiley   +1 more source

N-body problem in $R^n$: Necessary conditions for a constant configuration measure

open access: yesElectronic Journal of Differential Equations, 2008
A formulation of the N-body problem is presented in which $m_{i}$ and $r_{i}in mathbb{R}^d$ are the mass and the position vector of the i-th body, $ x=(sqrt{m_{1}}r_{1},dots ,sqrt{m_{N}}r_{N})in mathbb{R}^n$ and $ n=dN$ ($d=1,2,3$).
Kal Zare
doaj  

Canceling Effects of Conjunctions Render Higher-order Mean Motion Resonances Weak

open access: yesThe Astrophysical Journal
Mean motion resonances (MMRs) are a key phenomenon in orbital dynamics. The traditional disturbing function expansion in celestial mechanics shows that, for coplanar systems at low eccentricities, p : p  −  q MMRs exhibit a clear hierarchy of strengths ...
Elizabeth K. Jones   +3 more
doaj   +1 more source

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

Hip Morphology–Based Osteoarthritis Risk Prediction Models: Development and External Validation Using Individual Participant Data From the World COACH Consortium

open access: yesArthritis Care &Research, EarlyView.
Objective This study aims to develop hip morphology‐based radiographic hip osteoarthritis (RHOA) risk prediction models and investigates the added predictive value of hip morphology measurements and the generalizability to different populations. Methods We combined data from nine prospective cohort studies participating in the Worldwide Collaboration ...
Myrthe A. van den Berg   +26 more
wiley   +1 more source

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

Photodisintegration of 9Be and the importance of the unbound 1/2+ state

open access: yesEPJ Web of Conferences, 2016
The photodisintegration cross section of the 9Be(1/2+) state is investigated in a framework of the α + α + n three-body model. The 1/2+ state of 9Be locates just above the three-body threshold, and the s-wave neutron property of this state is a long ...
Odsuren Myagmarjav   +4 more
doaj   +1 more source

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