Results 31 to 40 of about 45,218 (214)

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

Titius-Bode’s Relation and Distribution of Exoplanets [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2010
The distance distribution in our planetary system has been a controversial matter. Two kinds of important issues on Titius-Bode’s relation have been discussed up to now: one is if there is a simple mathematical relation between distances of natural ...
Heon-Young Chang
doaj   +1 more source

Injection of Oort Cloud comets: the fundamental role of stellar perturbations [PDF]

open access: yes, 2008
Celestial Mechanics and Dynamical Astronomy, 102, pp.
Fouchard, M.   +3 more
core   +4 more sources

Modification of earth's gravity sphere [PDF]

open access: yesTheoretical and Applied Mechanics, 2013
The standard radius of the Earth's gravity sphere is 917.000 km. Here we present that the radius is 1.400.000 km.
Vujičić Veljko A.
doaj   +1 more source

The Proximities of Asteroids and Critical Points of the Distance Function [PDF]

open access: yesSerbian Astronomical Journal, 2010
The proximities are important for different purposes,for example to evaluate the risk of collisions of asteroids or comets with the Solar-System planets.
Milisavljevic, S.
doaj   +3 more sources

Crater Observing Bioinspired Rolling Articulator (COBRA)

open access: yesAdvanced Intelligent Systems, EarlyView.
Crater Observing Bio‐inspired Rolling Articulator (COBRA) is a modular, snake‐inspired robot that addresses the mobility challenges of extraterrestrial exploration sites such as Shackleton Crater. Incorporating snake‐like gaits and tumbling locomotion, COBRA navigates both uneven surfaces and steep crater walls.
Adarsh Salagame   +4 more
wiley   +1 more source

Time's Arrow, Music of the Spheres, December 8, 1994 [PDF]

open access: yes, 1994
This is the concert program of the Time's Arrow, Music of the Spheres performance on Thursday, December 8, 1994 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Primo Intermedio by Antonio
School of Music, Boston University
core  

Gevrey estimates for one dimensional parabolic invariant manifolds of non-hyperbolic fixed points [PDF]

open access: yes, 2017
We study the Gevrey character of a natural parameterization of one dimensional invariant manifolds associated to a parabolic direction of fixed points of analytic maps, that is, a direction associated with an eigenvalue equal to $1$.
Baldomá, Inmaculada   +2 more
core   +3 more sources

Semantic primitives and compositionality: An Annual Review of Information Science and Technology (ARIST) paper

open access: yesJournal of the Association for Information Science and Technology, EarlyView.
Abstract The term semantic primitives refers to a set of basic, atomic concepts from which all other (compound) concepts are constructed. It presupposes the principle of compositionality—the idea that complex items or expressions can be formed by combining simpler constituents.
Birger Hjørland
wiley   +1 more source

Empirical Stability Criteria for 3D Hierarchical Triple Systems. I. Circumbinary Planets

open access: yesThe Astronomical Journal
In this work we revisit the problem of the dynamical stability of hierarchical triple systems with applications to circumbinary planetary orbits. We derive critical semimajor axes based on simulating and analyzing the dynamical behavior of 3 × 10 ^8 ...
Nikolaos Georgakarakos   +3 more
doaj   +1 more source

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