Results 61 to 70 of about 45,419 (270)
Ecosystem services provided by spiders
Biological Reviews, EarlyView.ABSTRACT Spiders, ubiquitous and abundant predators in terrestrial ecosystems, often are the subjects of an unjust negative perception. However, these remarkable creatures stand as unsung heroes within our ecosystems, contributing a multitude of ecosystem services critical to human well‐being.
Pedro Cardoso +13 more
wiley +1 more source
Odessa Astronomical Publications, 2017 One of principal tasks of celestial mechanics is study of motion of natural satellites of planets. In this work, the authors have examined resonances in system of satellites and rings of Saturn.
A. S. Voitko, V. V. Troianskyi
doaj +1 more source
Global regularization method for planar restricted three-body problem [PDF]
Serbian Astronomical Journal, 2015 In this paper, global regularization method for planar restricted three-body problem is purposed by using the transformation z = x+iy = ν cos n(u+iv), where i = √−1, 0 < ν ≤ 1 and n is a positive integer. The method is developed analytically and
Sharaf M.A., Dwidar H.R.
doaj +1 more source
An Invitation to Singular Symplectic Geometry [PDF]
, 2017 In this paper we analyze in detail a collection of motivating examples to consider $b^m$-symplectic forms and folded-type symplectic structures. In particular, we provide models in Celestial Mechanics for every $b^m$-symplectic structure.
Braddell, Roisin +4 more
core +3 more sources
On the integrability of the n-centre problem
, 2004 It is known that for $n \geq 3$ centres and positive energies the $n$-centre problem of celestial mechanics leads to a flow with a strange repellor and positive topological entropy.
Knauf, Andreas, Taimanov, Iskander A.
core +2 more sources
European Journal of Philosophy, EarlyView.Abstract This essay aims to reveal the conceptual unity of an ensemble of concepts of organic, animal, and anthropological life articulated by the young Karl Marx between 1842 and 1844. To lay the groundwork for my analysis, I begin with Marx's general account of “life as activity.” I argue that Marx articulates a hylomorphic theory of organic form in ...
Christopher Shambaugh
wiley +1 more source
Motion of Test Bodies in a Quasi-Newtonian Potential. II. Comparison with Experiments
Open Astronomy, 2003 The paper deals with the motion of test bodies in a Quasi-Newtonian potential for which the expressions corresponding to the effects of General Relativity are found. It is impossible to choose the values of parameters of the potential which could be in a
Pyragas K., Svirskas K.
doaj +1 more source
Methods of algebraic manipulation in perturbation theory [PDF]
, 2012 We give a short introduction to the methods of representing polynomial and trigonometric series that are often used in Celestial Mechanics.
Giorgilli, Antonio, Sansottera, Marco
core +1 more source
Collisional Velocities and Rates in Resonant Planetesimal Belts
, 2007 We consider a belt of small bodies around a star, captured in one of the external or 1:1 mean-motion resonances with a massive perturber. The objects in the belt collide with each other.
A. Campo Bagatin +39 more
core +2 more sources
Social Justice as a Catalyst for Ecumenical Engagement
The Ecumenical Review, EarlyView.Abstract This article provides a comprehensive overview of the historical formation of the Federal Council of Churches of Christ in America (FCC), examining the social and political context in the United States that shaped its adoption of ecumenical practices focused on social justice.
Geneva Blackmer
wiley +1 more source