Results 41 to 50 of about 487,216 (307)
Improving the Accuracy of the Martian Ephemeris Short-Term Prediction
Advances in Astronomy, 2018 The Chinese Mars exploration mission is planned to be launched in 2020, which includes an orbiter, a lander, and a rover. High precision Martian ephemeris is very important in Mars exploration, especially for the Martian orbit insertion and the Martian ...
Quan Shan +5 more
doaj +1 more source
Theory of orbital state and spin interactions in ferromagnetic titanates [PDF]
Phys. Rev. B 68, 205109 (2003), 2005 A spin-orbital superexchange Hamiltonian in a Mott insulator with $t_{2g}$ orbital degeneracy is investigated. More specifically, we focus on a spin ferromagnetic state of the model and study a collective behavior of orbital angular momentum. Orbital order in the model occurs in a nontrivial way -- it is stabilized exclusively by quantum effects ...
arxiv +1 more source
A method for classifying orbits near asteroids [PDF]
Acta Mechanica Sinica 30(3), 316-325, 2014, 2017 A method for classifying orbits near asteroids under a polyhedral gravitational field is presented, and may serve as a valuable reference for spacecraft orbit design for asteroid exploration. The orbital dynamics near asteroids are very complex. According to the variation in orbit characteristics after being affected by gravitational perturbation ...
arxiv +1 more source
Orbit Prediction using Broadcast Ephemeris for GLONASS Satellite Visibility Analysis [PDF]
Journal of Astronomy and Space Sciences, 2009 Even though there are several Global Navigation Satellite Systems under development, only GPS and GLONASS are currently available for satellite positioning.
Hye-In Kim, Kwan-Dong Park
doaj +1 more source
Fulde-Ferrell pairing instability of a Rashba spin-orbit coupled Fermi gas
, 2013 We theoretically analyze the pairing instability of a three-dimensional ultracold atomic Fermi gas towards a Fulde-Ferrell superfluid, in the presence of Rashba spin-orbit coupling and in-plane Zeeman field. We use the standard Thouless criterion for the
Liu, Xia-Ji
core +2 more sources
A dichotomy in orbit-growth for commuting automorphisms [PDF]
J. London Math. Soc., 81, 715-726 (2010), 2009 We consider asymptotic orbit-counting problems for certain expansive actions by commuting automorphisms of compact groups. A dichotomy is found between systems with asymptotically more periodic orbits than the topological entropy predicts, and those for which there is no excess of periodic orbits.
arxiv +1 more source
Analysis and Design of the Automatic Flight Dynamics Operations For Geostationary Satellite Mission [PDF]
Journal of Astronomy and Space Sciences, 2009 Automation of the key flight dynamics operations for the geostationary orbit satellite mission is analyzed and designed. The automation includes satellite orbit determination, orbit prediction, event prediction, and fuel accounting.
Byoung-Sun Lee +4 more
doaj +1 more source
Quantum behavior of Orbitals in Ferromagnetic Titanates: Novel Orderings and Excitations [PDF]
, 2002 We investigate the collective behavior of orbital angular momentum in the spin ferromagnetic state of a Mott insulator with $t_{2g}$ orbital degeneracy. The frustrated nature of the interactions leads to an infinite degeneracy of classical states. Quantum effects select four distinct orbital orderings.
arxiv +1 more source
FEBS Letters, EarlyView.Hermansky‐Pudlak syndrome type 1 (HPS‐1) is a rare, autosomal recessive disorder with poorly understood renal involvement. Urinary extracellular vesicle (uEV) proteomics and a novel Hps1 mouse model reveal mitochondrial abnormalities and lipid accumulation in HPS‐1 kidney proximal tubule cells. Serum ApoA1 correlates with kidney function in our patient
Dawn M. Maynard +7 more
wiley +1 more source
A review of real-time multi-GNSS precise orbit determination based on the filter method
Satellite Navigation, 2022 Stable and reliable high-precision satellite orbit products are the prerequisites for the positioning services with high performance. In general, the positioning accuracy depends strongly on the quality of satellite orbit and clock products, especially ...
Yidong Lou +7 more
doaj +1 more source