Results 51 to 60 of about 783,055 (280)

Applications of KS - variables in celestial mechanics

open access: yesBibechana, 2010
This paper deals with the transformation of KS-Variables and canonically conjugate variables from sideral (inertial) to synodic (rotating) form and their applications in "the circular restricted problem of three bodies in three-dimensional coordinate ...
MR Hassan, RR Thapa
doaj   +3 more sources

Post-Newtonian Approximation in Maxwell-Like Form [PDF]

open access: yes, 2009
The equations of the linearized first post-Newtonian approximation to general relativity are often written in "gravitoelectromagnetic" Maxwell-like form, since that facilitates physical intuition.
A. Einstein   +14 more
core   +2 more sources

Computation of asteroid proper elements: Recent advances [PDF]

open access: yesSerbian Astronomical Journal, 2017
The recent advances in computation of asteroid proper elements are briefly reviewed. Although not representing real breakthroughs in computation and stability assessment of proper elements, these advances can still be considered as important improvements
Knežević Z.
doaj   +1 more source

Convex central configurations of two twisted n-gons [PDF]

open access: yes, 2015
Extended Conference abstract corresponding to talk given at the "Conference on Hamiltonian Systems and Celestial Mechanics 2014" (HAMSYS2014) held at the Centre de Recerca Matemàtica (CRM) in Barcelona from June 2nd to 6th, 2014.
Barrabés Vera, Esther   +1 more
core   +1 more source

Hydrodynamics, Cosmogony, and Cosmology in publications of V. V. Perekhrest: from Planetary Vortices to Galaxies and Dark Energy

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Modelûvannâ, 2016
Publications of V. I. Perekhrest with numerous applications of a class of exact vortex solutions to the Euler equations for incompressible media to celestial mechanics, cosmogony, and cosmology, have been studied.
V. L. Borsch
doaj   +1 more source

Third derivatives of the integrable part of an asteroid Hamiltonian [PDF]

open access: yesSerbian Astronomical Journal, 2007
To apply the theorem of Nekhoroshev (1977) to asteroids, one first has to check whether a necessary geometrical condition is fulfilled: either convexity, or quasi-convexity, or only a 3-jet non-degeneracy.
Pavlović R.
doaj   +1 more source

An approach to Mel'nikov theory in celestial mechanics [PDF]

open access: yes, 1999
Using a completely analytic procedure - based on a suitable extension of a classical method - we discuss an approach to the Poincar\'e-Mel'nikov theory, which can be conveniently applied also to the case of non-hyperbolic critical points, and even if the
Cicogna, G., Santoprete, M.
core   +3 more sources

Angular momentum bounds in particle systems [PDF]

open access: yesCelestial Mechanics and Dynamical Astronomy, December 2019, 131:58, 2019
Four expressions involving sums of position and velocity coordinates bounding the total angular momentum of particle systems, and by extension of any continuous or discontinuous material systems, are derived which are tighter for any particle configuration than similar inequalities derived by Sundman (1913), Saari (2005) and Scheeres (2012).
arxiv   +1 more source

Considering the animating ethos of designing digital first unemployment services: On the motivation of others

open access: yesAustralian Journal of Social Issues, EarlyView.
Abstract This paper explores the animating ethos of digital unemployment services. Unlike human‐to‐human services, where the intention of policy is normally mediated by professionals, digital services are fully designed in the policy imagination. As a result, it is a pressing issue to understand the ethos that animates their development.
Ray Griffin   +2 more
wiley   +1 more source

The epicycle model

open access: yesModelling in Science Education and Learning, 2013
The solutions of the equations of motion for a point mass particle under a conservative force field are generally constrained by a basic set of integrals of motion, which depend on the knowledge about the potential function and on time and space ...
Rafael Cubarsi
doaj   +1 more source

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