Results 11 to 20 of about 1,033,209 (296)

Refinement of a gravimetric geoid model for Japan using GOCE and an updated regional gravity field model

open access: yesEarth, Planets and Space, 2020
We developed a refined gravimetric geoid model for Japan on a 1 × 1.5 arc-minute (2 km) grid from a GOCE-based satellite-only global geopotential model and a regional gravity field model updated in this study.
Koji Matsuo, Yuki Kuroishi
doaj   +1 more source

Instability in the Magnetized Accretion Disks with Outflows in the Presence of Self-Gravity [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics, 2022
We study the stability of a model of magnetized accretion disk, in whichoutflows play a significant role in driving the inflow, and magnetic field is generated bya dynamo operating in the disk.
Sekine Karimzadeh   +2 more
doaj   +1 more source

String-Generated Gravity Models [PDF]

open access: yesPhysical Review Letters, 1985
Expansion of supersymmetric string theory suggests that the leading quadratic curvature correction to the Einstein action is the Gauss-Bonnet invariant. We show that this model has both flat and anti-de Sitter space as solutions, but that the cosmological branch is unstable, because the graviton becomes a ghost there: The theory solves its own ...
Boulware, David G., Deser, S.
openaire   +3 more sources

Monthly gravity field solution from GRACE range measurements using modified short arc approach

open access: yesGeodesy and Geodynamics, 2015
In this paper we present a series of monthly gravity field solutions from Gravity Recovery and Climate Experiment (GRACE) range measurements using modified short arc approach, in which the ambiguity of range measurements is eliminated via differentiating
Yunzhong Shen, Qiujie Chen, Houze Xu
doaj   +1 more source

Application of Radial Basis Functions for Height Datum Unification

open access: yesGeosciences, 2018
Local gravity field modelling demands high-quality gravity data as well as an appropriate mathematical model. Particularly in coastal areas, there may be different types of gravity observations available, for instance, terrestrial, aerial, marine gravity,
Ismael Foroughi   +3 more
doaj   +1 more source

A Hydro-Dynamical Model for Gravity [PDF]

open access: yesINCAS Bulletin, 2016
hydro-dynamical model for gravity by using an analogy with the attraction of spherical sources in incompressible fluids is proposed. Information regarding a photon-like particle called graviton is taken using an author’s previous paper [6]. The substance
Corneliu BERBENTE
doaj   +1 more source

Investigating the impact of GDP and distance variables in the gravity model using sign and rank tests [PDF]

open access: yesEastern Journal of European Studies, 2021
The gravity model of trade has been a workhorse of international economics over the last fifty years. The main variables incorporated in the standard gravity model of trade are gross domestic product of trading countries and distance between them.
Berislav ŽMUK, Hrvoje JOŠIĆ
doaj   +1 more source

An iterative Wiener filtering method based on the gravity gradient invariants

open access: yesGeodesy and Geodynamics, 2015
How to deal with colored noises of GOCE (Gravity field and steady – state Ocean Circulation Explorer) satellite has been the key to data processing. This paper focused on colored noises of GOCE gradient data and the frequency spectrum analysis. According
Rui Zhou, Xiaoping Wu
doaj   +1 more source

Standard model with gravity couplings [PDF]

open access: yesPhysical Review D, 1996
Extended, and replaced with LaTex file.
Chang, Lay Nam, Soo, Chopin
openaire   +3 more sources

Binary structure constrained gravity inversion based on seismic first arrival travel time data

open access: yesFrontiers in Earth Science, 2023
Gravity exploration method is one of the important methods for deep mineral resource exploration, but gravity data inversion has limited resolution ability in the vertical direction.
Xinhui Deng   +2 more
doaj   +1 more source

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