Results 21 to 30 of about 1,235,817 (343)
No conformal anomaly in unimodular gravity [PDF]
Physical Review D, 2013 The conformal invariance of unimodular gravity survives quantum corrections, even in the presence of conformal matter. Unimodular gravity can actually be understood as a certain truncation of the full Einstein-Hilbert theory, where in the Einstein frame the metric tensor enjoys unit determinant.
Alvarez Vázquez, Enrique +1 more
openaire +3 more sources
Anomalies in covariant W-gravity
Physics Letters B, 1991 Abstract We consider free scalar matter covariantly coupled to background W-gravity. Expanding to second order in the W-gravity fields, we study the appropriate anomalous Ward-Takahashi identities and find the counterterms which maintain diffeomorphism invariance and its W-analogue. We see that a redefinition of the vielbein transformation rule under
A. CERESOLE +3 more
openaire +5 more sources
The planning of the first and second order relative gravimetric networks for the territory of the Republic of Albania [PDF]
Micro, Macro & Mezzo Geoinformation, 2020 This paper presents the first and second order gravimetric relative network planning for the territory of the Republic of Albania, as well as the calculation of free-air anomalies, Bouguer anomalies, and Bouguer gravity.
Fitore Bajrami Lubishtani +1 more
doaj
Non‐Newtonian gravity or gravity anomalies? [PDF]
Eos, Transactions American Geophysical Union, 1988 We emphasize the importance of gravity anomalies in interpreting geophysical data, which has indicated a deviation from the Newtonian inverse square law. In particular, we point out that gravity anomalies, if not accounted for properly, mimic non‐Newtonian behavior. On the other hand, omitting them provides a false signal contributing to the “fifth” or
David Parry Rubincam +3 more
openaire +1 more source
Application of Radial Basis Functions for Height Datum Unification
Geosciences, 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
Swiss Journal of Geosciences, 2021 Gravity data retrieved from the Bureau Gravimétrique International and the Gravimetric Atlas of Switzerland have been used to evaluate their applicability as a subsurface investigation tool to assess key geological features in support of the geothermal ...
L. Guglielmetti, A. Moscariello
doaj +1 more source
Inversion of residual gravity anomalies using tuned PSO
, 2017 . Many kinds of particle swarm optimization (PSO) techniques are now available and various efforts have been made to solve linear and non-linear problems as well as one-dimensional and multi-dimensional problems of geophysical data.
R. Roshan, U. Singh
semanticscholar +1 more source
Causal Anomalies in Kaluza-Klein Gravity Theories [PDF]
, 1998 Causal anomalies in two Kaluza-Klein gravity theories are examined, particularly as to whether these theories permit solutions in which the causality principle is violated. It is found that similarly to general relativity the field equations of the space-
A. F. F. TEIXEIRA +19 more
core +3 more sources
Predicting Depth of Mineral Deposit using Gravity-Density Downward Correlation by Fourier Transform
Геофизический журнал, 2016 Residual gravity anomalies are the superposition of effects originating from several interfaces in the subsurface. In downward projection of the anomalies for the determination of the depth of the particular substructure which accounts for the bulk of ...
E. E. Epuh +2 more
doaj +1 more source