Results 31 to 40 of about 1,033,793 (200)

The Optimal Degree of Gravity Spherical Harmonic Model Calculation for Gravity Disturbance Compensation in Inertial Navigation

MATEC Web of Conferences, 2018
In recent years, the significant improvement of inertial navigation, leaves the gravity disturbance as the important factor which affects the accuracy of inertial navigation.
TIE Junbo, WU Meiping, Cao Juliang, Lian Junxiang, Cai Shaokun, Wang Lin   +5 more
doaj   +1 more source

Quantum Analysis of Jackiw and Teitelboim's Model for 1+1 D Gravity and Topological Gauge Theory

, 1992
We study the BRST quantization of the 1+1 dimensional gravity model proposed by Jackiw and Teitelboim and also the topological gauge model which is equivalent to the gravity model at least classically.
Achúcarro, Bershadsky, Chamseddine, Chamseddine, Chamseddine, Curtright, D'Hooker, D'Hooker, D'Hooker, David, Distler, Eguchi, Fujikawa, Fujikawa, Fukuyama, Gervais, Gervais, Gervais, Gervais, Gervais, Haruhiko Terao, Henneaux, Isler, Jackiw, Knizhnik, Komata, Polyakov, Polyakov, Teitelboim, Terao, Witten, Yamada, Yoneya   +32 more
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A 200 km suspected impact crater Kotuykanskaya near Popigai, Siberia, in the light of new gravity aspects from EIGEN 6C4, and other data [PDF]

, 2020
We provide arguments in favour of impact origin of a 200 km suspected impact crater Kotuykanskaya near Popigai, Siberia, Russia. We use the gravity aspects (gravity disturbances, the Marussi tensor of the second derivatives of the disturbing geopotential,
Bezděk, Aleš, Kletetschka, Gunther, Klokočník, Jaroslav, Kostelecký, Jan, Staňková, Hana   +4 more
core   +1 more source

A Fast Forward and Inversion Strategy for Three-Dimensional Gravity Field

Mathematics, 2023
Obtaining a three-dimensional (3D) density distribution within a reasonable time is one of the most critical problems in gravity exploration. In this paper, we present an efficient 3D forward modeling and inversion method for gravity data.
Jianke Qiang, Jing Xu, Kai Lu, Zhenwei Guo   +3 more
doaj   +1 more source

Observational Constraints on Kinetic Gravity Braiding from the Integrated Sachs-Wolfe Effect

, 2012
The cross-correlation between the integrated Sachs-Wolfe (ISW) effect and the large scale structure (LSS) is a powerful tool to constrain dark energy and alternative theories of gravity.
Kazuhiro Yamamoto, Rampei Kimura, S. Capozziello, Tsutomu Kobayashi   +3 more
core   +1 more source

Kinematic-gravity model of geodynamo

Геофизический журнал, 2013
Based on the results of solving the inverse problem of magnetometry and analysis of some known models of the Earth magnetic field generation a model is proposed in which the current producing magnetic field is the vortex motion of positively charged ...
V.A. Kochnev
doaj   +1 more source

Logarithmic gravity model

International Journal of Modern Physics D, 2023
In this paper, the modified [Formula: see text] gravity theory with the function [Formula: see text] is studied. The action at small coupling [Formula: see text] becomes Einstein–Hilbert action. The bound on the parameter [Formula: see text] from local tests is [Formula: see text] cm2. We find the constant curvature solutions and it was shown that the
openaire   +2 more sources

2D GRAVITY AND MATRIX MODELS I: 2D GRAVITY [PDF]

International Journal of Modern Physics A, 1994
Some approaches to 2D gravity which have been developed in the last few years are reviewed. They are physical (Liouville) gravity, topological theories and matrix models. Special attention is paid to matrix models and their interrelations with different approaches. Almost all technical details are omitted, but examples are presented.
openaire   +3 more sources

Seafloor Topography Estimation from Gravity Anomaly and Vertical Gravity Gradient Using Nonlinear Iterative Least Square Method

Remote Sensing, 2020
Currently, seafloor topography inversion based on satellite altimetry gravity data provides the principal means to predict the global seafloor topography. Researchers often use sea surface geoid height or gravity anomaly to predict sea depth in the space
Diao Fan, Shanshan Li, Xinxing Li, Junjun Yang, Xiaoyun Wan   +4 more
doaj   +1 more source

Classical and Quantum Integrability of 2D Dilaton Gravities in Euclidean space

, 2004
Euclidean dilaton gravity in two dimensions is studied exploiting its representation as a complexified first order gravity model. All local classical solutions are obtained.
Alexandrov S Y, Ashtekar A, Bergamin L, Blaschke D Kummer W, Bojowald M, Cacciatori S, D Grumiller, D V Vassilevich, David F, Dowker J S, Frolov V P, Ginsparg P Moore G W, Grumiller D, Grumiller D, Grumiller D, Ivey T A, Jackiw R, Jorjadze G, Klösch T, Kummer W, L Bergamin, Mann R B, Schaller P, Schaller P Strobl T, Teitelboim C, Vassilevich D V, W Kummer, Witten E   +27 more
core   +1 more source