Results 251 to 260 of about 108,603 (294)

Ocular Manifestations of Gravity Inversion

JAMA: The Journal of the American Medical Association, 1985
To determine the ocular manifestations of inverting the human body into a head-down vertical position, we evaluated normal volunteers with applanation tonometry, fundus photography, fluorescein angiography, and ophthalmodynamometry. Compared with data obtained in the sitting position, the intraocular pressure more than doubled on inversion (35.6 ±4v14 ...
T R, Friberg, R N, Weinreb
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Gravity inversion with depth normalization

2020
<p>Actually the most common method of gravity data interpretation is a manual fitting method. In this case, the density model is divided into many polygons with constant density and each polygon is editing manually by interpreter.
Lev Chepigo, Lygin Ivan, Andrey Bulychev
openaire   +1 more source

Noniterative nonlinear gravity inversion

GEOPHYSICS, 1993
To obtain the shape of a homogeneous body from its gravity anomalies, the inverse of Parker’s formula is expressed here by means of a power series expansion in the reciprocal of the density contrast. The calculation of the nth coefficient of the series needs the evaluation of [Formula: see text] Fourier transforms of products and sums of the preceding
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Lithological Constrained Gravity Inversion. A Bayesian Approach

81st EAGE Conference and Exhibition 2019, 2019
A new method for the gravity inversion is presented. It is based on a Bayesian approach and it allows to preserve sharp boundary between different lithologies.
P. Marchetti, D. Sampietro, M. Capponi, L. Rossi, M. Reguzzoni, F. Porzio, F. Sansò   +6 more
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Ocular Effects of Gravity Inversion

JAMA: The Journal of the American Medical Association, 1985
To the Editor.— Friberg and Weinreb 1 recently reported the occurrence of increased intraocular pressure with the head-down position, and suggested that patients with certain conditions, including glaucoma, should refrain from inversion altogether. Report of a Case.— We recently saw a 68-year-old athletic physician in excellent health who was first ...
openaire   +2 more sources

Techniques in Doppler gravity inversion

Journal of Geophysical Research, 1974
The types of Doppler gravity data available for local as opposed to planetwide geophysical modeling are reviewed. Those gravity fields that are determined dynamically in orbit determination programs yield a smoothed representation of the local gravity field that may be used for quantitative modeling.
openaire   +1 more source

3D STOCHASTIC GRAVITY INVERSION ON UNSTRUCTURED MESHES

Symposium on the Application of Geophysics to Engineering and Environmental Problems 2014, 2014
The stochastic gravity inversion on unstructured meshes is presented. The unstructured meshes are used because they provide the flexibility required to closely approximate complicated geological structures. Sharp topographic relief and geological bodies of complex shapes are usually more accurately described by unstructured meshes rather than with ...
Pejman Shamsipour, Ernst Schetselaar, Michel Chouteau, Denis Marcotte   +3 more
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Inversion Reconstruction of Gravity Potential Based on Gravity Gradients

Mathematical Geosciences, 2008
A new method was developed for the inversion reconstruction of gravity potential. This method offers the possibility to determine the potential function and all of its important derivatives using the common inversion of gravity gradients and the first derivatives of potential. Gravity gradients can be originated from Torsion balance measurements, while
Dobróka, Mihály, Völgyesi, Lajos
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Adaptive multinary inversion of gravity and gravity gradiometry data

GEOPHYSICS, 2017
We have developed a novel approach for inversion of gravity and gravity gradiometry data based on multinary transformation of the model parameters. This concept is a generalization of binary density inversion to the models described by any number of discrete model parameters.
Michael S. Zhdanov, Wei Lin
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Optic Nerve Dysfunction During Gravity Inversion

Archives of Ophthalmology, 1987
Inversion in a head-down position (gravity inversion) results in an intraocular pressure of 35 to 40 mm Hg in normal subjects. We used computerized static perimetry to measure the visual fields of normal subjects during gravity inversion. There were no visual field changes in the central 6 degrees of the visual field compared with the baseline ...
G E, Sanborn, T R, Friberg, R, Allen
openaire   +2 more sources