Results 31 to 40 of about 91,187 (349)
Short Term Evolution of Artificial Satellites
Celestial Mechanics and Dynamical Astronomy, 2001 When the elimination of the parallax and the elimination of the perigee is applied to the zonal problem of the artificial satellite, a one-degree of freedom Hamiltonian is obtained. The classical way to integrate this Hamiltonian is by applying the Delaunay normalization, however, changing the time to the perturbed true anomaly and the variable to the ...
Abad, A., San-Juan, J.F., Gavín, A.
openaire +3 more sources
Advanced Functional Materials, EarlyView.This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner +9 more
wiley +1 more source
ON THE CHARACTER OF AN ARTIFICIAL SATELLITE DRAG UNDER VARIOUS STATES OF SOLAR AND GEOMAGNETIC ACTIVITY [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: The artificial satellites drag in the atmosphere remains an urgent problem to date. In this work, the artificial satellites data are used in order to study the atmosphere state under various manifestations of solar and geomagnetic activity.
V. H. Komendant
doaj +1 more source
An Experimental Platform for Multi-spacecraft Phase-Array Communications
, 2017 The emergence of small satellites and CubeSats for interplanetary exploration will mean hundreds if not thousands of spacecraft exploring every corner of the solar-system.
Babuscia, Alessandra +5 more
core +1 more source
On the possibility of testing the Weak Equivalence Principle with artificial Earth satellites [PDF]
, 2003 In this paper we examine the possibility of testing the equivalence principle, in its weak form, by analyzing the orbital motion of a pair of artificial satellites of different composition moving along orbits of identical shape and size in the ...
Iorio, Lorenzo
core +1 more source
Photoswitching Conduction in Framework Materials
Advanced Functional Materials, EarlyView.This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez +4 more
wiley +1 more source
The life and scientific activity of Ukrainian astronomer V. M. Grigorevsky (1930-1981)
Історія науки і техніки, 2019 In 2020, the scientific community will celebrate the 90th birthday of Vitaly Grigorevsky – the Ukrainian astronomer, a specialist in satellite astronomy, a representative of a scientific school of an outstanding Ukrainian scientist, corresponding member ...
Iryna Hrushytska
doaj +1 more source
Satellite non-gravitational orbital perturbations and the detection of the gravitomagnetic clock effect [PDF]
, 2001 The general relativistic gravitomagnetic clock effect consists in the fact that two massive test bodies orbiting a central spinning mass in its equatorial plane along two identical circular trajectories, but in opposite directions, take different times ...
Iorio, Lorenzo
core +1 more source
MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance
Advanced Functional Materials, EarlyView.Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley +1 more source
Re-recognized universality of Kozai oscillation on three-body dynamics
Proceedings of the Japan Academy. Series B, Physical and Biological SciencesIn 1962, Yoshihide Kozai reported his findings on the secular dynamics of asteroids moving in orbits with high inclination and eccentricity. In contrast to the classic understanding of the stability of planetary motion in the solar system, Kozai showed ...
Masanori IYE, Takashi ITO
doaj +1 more source