Results 41 to 50 of about 333,723 (77)
Effects of Dynamical Evolution of Giant Planets on the Delivery of Atmophile Elements During Terrestrial Planet Formation [PDF]
, 2015 Recent observations started revealing the compositions of protostellar discs and planets beyond the Solar System. In this paper, we explore how the compositions of terrestrial planets are affected by dynamical evolution of giant planets. We estimate the initial compositions of building blocks of these rocky planets by using a simple condensation model,
arxiv +1 more source
, 2021 La lutte contre les micropolluants métalliques urbains représente un enjeu véritablement majeur et complexe, en particulier dans les zones côtières, du fait d’une urbanisation croissante et de l’émission de formes émergentes de contaminants métalliques comme les Terres Rares.
openaire +1 more source
Computing Classical Orbital Elements with Improved Efficiency and Accuracy [PDF]
This paper reviews the standard algorithm for converting spacecraft state vectors to Keplerian orbital elements with a focus on its computer implementation. It analyzes the shortcomings of the scheme as described in the literature, and proposes changes to the implementation to address orbits of arbitrary eccentricity and inclination in a simple and ...
arxiv +1 more source
Stochastic Gauss Equations [PDF]
, 2014 We derive the equations of celestial mechanics governing the variations of the orbital elements under a stochastic perturbation generalizing the classical Gauss equations. Explicit formulas are given for the semi-major axis, the eccentricity, the inclination, the longitude of the ascending node, the pericenter angle and the mean anomaly which are ...
arxiv +1 more source
The three-fold theoretical basis of the Gravity Probe B gyro precession calculation [PDF]
, 2014 The Gravity Probe B (GP-B) experiment is complete and the results are in agreement with the predictions of general relativity (GR) for both the geodetic precession, 6.6 arcsec/yr to about 0.3%, and the Lense-Thirring precession, 39 marcsec to about 19%. This note is concerned with the theoretical basis for the predictions.
arxiv +1 more source
Magnetic and Transport Properties of the Kondo Lattice Model with Ferromagnetic Exchange Coupling [PDF]
Springer Series in Solid-State Sciences 119, 1995 The Kondo lattice model with Hund's ferromagnetic spin coupling is investigated as a microscopic model of the perovskite-type $3d$ manganese oxide (R,A)MnO$_3$ where $R$ and $A$ are rare earth element and alkaline earth element, respectively. We take the classical spin limit $S=\infty$ for the simplicity of the calculation, since the quantum exchange ...
arxiv
HeliyonA methodological approach based on rare earth elements analysis was developed to observe human activities in the stratigraphic sequence of Alagankulam.
Thirumalini Selvaraj +7 more
doaj
Photoemission Study of Rare-Earth Ditelluride Compounds (ReTe_2 : Re = La, Pr, Sm, and Gd) [PDF]
arXiv, 1999 We studied the electronic structure of rare-earth ditelluride (ReTe_2 : Re = La, Pr, Sm, and Gd) using photoemission spectroscopy. From the x-ray photoelectron spectroscopy (XPS) study of the 3d core levels of rare-earth elements, we found that all the rare earth elements are trivalent.
arxiv
Five Classical Elements: Earth, Wood, Fir, Air, Quintessence
, 2016 A series of artefacts exploring the classical elements of the universe, earth, sun, air, wood, and quintessence, challenge the emotional connection, awareness, sustainable design and material research approaches. The elements are historical, sociological, philosophical and essential matters.
openaire +1 more source
The birth, life and death of convective plumes generated by a green laser in an isothermal fluid [PDF]
Campbell, IH, 2006, Large Igneous Provinces and the mantle plume
hypothesis, Elements, 1, 265-269, 2006, 2010 The aim is to laboratory simulation of convective plumes in the lower mantle, generated by a hot spot on the Earth's core. In the fluid dynamics video, presented results of experimental modeling of the plume from the hot point generated by the laser.
arxiv