Results 51 to 60 of about 568,374 (258)
Injection of Oort Cloud comets: the fundamental role of stellar perturbations [PDF]
, 2008 Celestial Mechanics and Dynamical Astronomy, 102, pp.
Fouchard, M. +3 more
core +4 more sources
Germanium‐Based Mid‐Infrared Integrated Photonics
Laser &Photonics Reviews, EarlyView.The mid‐infrared (mid‐IR) spectral range is a part of the electromagnetic spectrum in which most of the molecules have vibrational and rotational resonances. Photonics integration in this wavelength range have thus seen a burst of interest in the recent years, mainly driven by applications related with the detection of chemical and biological ...
Delphine Marris‐Morini +6 more
wiley +1 more source
TITIUS-BODE`S Relation and 55 Cancri [PDF]
Journal of Astronomy and Space Sciences, 2008 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 bodies orbiting a central body, and the other is if there is any physical basis for such
Heon-Young Chang
doaj +1 more source
Gevrey estimates for one dimensional parabolic invariant manifolds of non-hyperbolic fixed points [PDF]
, 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
Sampling, Mobility, and Anchoring in Small‐Body Sampling Robots: A Comprehensive Review
SmartBot, EarlyView.Small‐body sampling robots are exploration systems that perform contact, sampling, and stable operations on microgravity bodies such as asteroids and comets. The authors review representative robot architectures and key technologies, focusing on the mechanisms, evolution, and coupling of sampling, mobility, and anchoring.
Yurui Shen +7 more
wiley +1 more source
Modelling 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
Third derivatives of the integrable part of an asteroid Hamiltonian [PDF]
Serbian 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
Journal of the Royal Anthropological Institute, EarlyView.This article contributes to rethinking the dichotomy between informal sociality and ritual formality by examining the occasional ritual encounters surrounding spirit‐tablet inscription in Chinese Buddhist temples. Rather than viewing rituals as enactments of established orders, it presents ritual engagement as a contingent process of relational ...
Yang Shen
wiley +1 more source
Interaction between celestial and terrestrial reference frames and some considerations for the next VLBI-based ICRF [PDF]
, 2014 In this paper we outline several problems related to the realization of the international celestial and terrestrial reference frames ICRF and ITRF at the millimeter level of accuracy, with emphasis on ICRF issues. The main topics considered are: analysis
Lambert, Sebastien +3 more
core
An approach to Mel'nikov theory in celestial mechanics [PDF]
, 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