Effect of winding harmonics on the asynchronous torque of a single-phase line start permanant-magnet motor [PDF]
, 2005 This paper presents an analytical method for calculating the effect of winding harmonics on the asynchronous torque of a single-phase line-start permanent-magnet motor.
McGilp, M.I. +5 more
core +3 more sources
Comparison of Swarm and GRACE time-variable gravity field at low degree spherical harmonics
, 2021 International audienceThe GRACE and GRACE Follow-On missions provide monthly time-variable gravity field estimates since 2002 with a 11-month gap between 2017-2018.
Lecomte, Hugo +2 more
core +1 more source
A proposal for a Bohmian ontology of quantum gravity [PDF]
, 2013 The paper shows how the Bohmian approach to quantum physics can be applied to develop a clear and coherent ontology of non-perturbative quantum gravity.
Michael Esfeldy +7 more
core +1 more source
SPACETIME OR QUANTUM PARTICLES: THE ONTOLOGY OF QUANTUM GRAVITY? [PDF]
, 1996 The domains of quantum theory and general relativity overlap in situations where quantum mechanical effects cannot be ignored. In order to deal with this overlap of theoretical domains, there has been a tendency to apply the rules of quantum field theory
Peter J. Riggs +2 more
core +1 more source
The viability of modified gravity theories [PDF]
, 2009 PhDThis thesis studies the viability of classes of modified gravity (MG) theories based on generalisations of the Einstein-Hilbert action. Particular emphasis is given to f(R) theories in both the metric and Palatini formalisms, scalar-tensor theories ...
Uddin, Kotub
core +2 more sources
GRAIL Gravity Field Determination Using the Celestial Mechanics Approach [PDF]
, 2014 The NASA mission GRAIL (Gravity Recovery and Interior Laboratory) inherited its concept from the GRACE (Gravity Recovery and Climate Experiment) mission to determine the gravity field of the Moon.
Arnold, Daniel +10 more
core +8 more sources
Influence of Low Europa Orbit design on gravity field recovery
, 2021 The characterization of Europa's surface and interior ocean and ice shell is key to explore the habitability of the fourth largest moon of Jupiter. Europa Clipper will largely contribute to our knowledge of Europa with multiple dedicated flybys. However,
Arnold, Daniel +4 more
core +1 more source
Is Gravity an Entropic Force? [PDF]
, 2011 The remarkable connections between gravity and thermodynamics seem to imply that gravity is not fundamental but emergent, and in particular, as Verlinde suggested, gravity is probably an entropic force.
Shan, Gao, Shan Gao
core +1 more source
Frontiers in Astronomy and Space Sciences, 2019 This paper investigates the long-term evolution of spacecraft in Highly Elliptical Orbits (HEOs). The single averaged disturbing potential due to luni-solar perturbations, zonal harmonics of the Earth gravity field is written in mean Keplerian elements ...
Camilla Colombo
doaj +1 more source
Space Gravity Spectroscopy - determination of the Earth’s gravitational field by means of Newton interpolated LEO ephemeris Case studies on dynamic (CHAMP Rapid Science Orbit) and kinematic orbits [PDF]
Advances in Geosciences, 2003 An algorithm for the (kinematic) orbit analysis of a Low Earth Orbiting (LEO) GPS tracked satellite to determine the spherical harmonic coefficients of the terrestrial gravitational field is presented.
T. Reubelt, G. Austen, E. W. Grafarend
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