1-19 OF 19
Results shown limited to content with bounding coordinates.
Walter E. Medeiros
Close
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

Scaling laws of karst dissolution features: Evidence from three-dimensional unmanned aerial vehicle imaging and ground-penetrating radar analyses

Juliana A. G. Lopes, Walter E. Medeiros, Renato R. S. Dantas, Josibel G. Oliveira, Jr., Flávio L. Santana, Francisco H. R. Bezerra
Journal: AAPG Bulletin
Published: 01 January 2025
AAPG Bulletin (2025) 109 (1): 35–56.
DOI: https://doi.org/10.1306/09202423118
FIGURES | View All (14)
View PDF for article title, Scaling laws of karst dissolution features: Evidence from three-dimensional unmanned aerial vehicle imaging and ground-penetrating radar analyses
Purchase
Add to Citation Manager for Scaling laws of karst dissolution features: Evidence from three-dimensional unmanned aerial vehicle imaging and ground-penetrating radar analyses
Journal Article

A linear approach to simulate a constant- Q model in time-domain ground-penetrating radar modeling using multiple Debye poles: Theory and application in karst carbonate rocks

Bruno B. Santos, Renato R. S. Dantas, Walter E. Medeiros, Juliana A. G. Lopes, Josibel G. Oliveira Jr., Flávio L. Santana
Journal: Geophysics
Published: 28 October 2022
Geophysics (2022) 87 (6): E401–E413.
DOI: https://doi.org/10.1190/geo2021-0731.1
FIGURES | View All (10)
View PDF for article title, A linear approach to simulate a constant- Q model in time-domain ground-penetrating radar modeling using multiple Debye poles: Theory and application in karst carbonate rocks
Purchase
Add to Citation Manager for A linear approach to simulate a constant- Q model in time-domain ground-penetrating radar modeling using multiple Debye poles: Theory and application in karst carbonate rocks
Journal Article

A multiscale approach to full-waveform inversion using a sequence of time-domain misfit functions

Renato R. S. Dantas, Walter E. Medeiros, Jessé C. Costa
Journal: Geophysics
Published: 27 May 2019
Geophysics (2019) 84 (4): R539–R551.
DOI: https://doi.org/10.1190/geo2018-0291.1
FIGURES | View All (22)
View PDF for article title, A multiscale approach to full-waveform inversion using a sequence of time-domain misfit functions
Purchase
Add to Citation Manager for A multiscale approach to full-waveform inversion using a sequence of time-domain misfit functions
Journal Article

A user-driven feedback approach for 2D direct current resistivity inversion based on particle swarm optimization

Francisco M. Barboza, Walter E. Medeiros, Jerbeson M. Santana
Journal: Geophysics
Published: 27 February 2019
Geophysics (2019) 84 (2): E105–E124.
DOI: https://doi.org/10.1190/geo2017-0735.1
FIGURES | View All (20)
View PDF for article title, A user-driven feedback approach for 2D direct current resistivity inversion based on particle swarm optimization
Purchase
Add to Citation Manager for A user-driven feedback approach for 2D direct current resistivity inversion based on particle swarm optimization
Journal Article

Customizing constraint incorporation in direct current resistivity inverse problems: A comparison among three global optimization methods

Francisco M. Barboza, Walter E. Medeiros, Jerbeson M. Santana
Journal: Geophysics
Published: 11 October 2018
Geophysics (2018) 83 (6): E409–E422.
DOI: https://doi.org/10.1190/geo2017-0188.1
FIGURES | View All (15)
View PDF for article title, Customizing constraint incorporation in direct current resistivity inverse problems: A comparison among three global optimization methods
Purchase
Add to Citation Manager for Customizing constraint incorporation in direct current resistivity inverse problems: A comparison among three global optimization methods
Journal Article

Reverse time migration using phase crosscorrelation

Jessé C. Costa, Walter E. Medeiros, Martin Schimmel, Flávio L. Santana, Jörg Schleicher
Journal: Geophysics
Published: 06 June 2018
Geophysics (2018) 83 (4): S345–S354.
DOI: https://doi.org/10.1190/geo2017-0791.1
View PDF for article title, Reverse time migration using phase crosscorrelation
Purchase
Add to Citation Manager for Reverse time migration using phase crosscorrelation
Journal Article

Automatic approximate mapping of the subsurface resistivity from apparent resistivity data using geostatistics

Jerbeson M. Santana, Walter E. Medeiros
Journal: Geophysics
Published: 15 March 2016
Geophysics (2016) 81 (2): E177–E186.
DOI: https://doi.org/10.1190/geo2015-0189.1
FIGURES | View All (10)
View PDF for article title, Automatic approximate mapping of the subsurface resistivity from apparent resistivity data using geostatistics
Purchase
Add to Citation Manager for Automatic approximate mapping of the subsurface resistivity from apparent resistivity data using geostatistics
Journal Article

Resolution in crosswell traveltime tomography: The dependence on illumination

Renato R. S. Dantas, Walter E. Medeiros
Journal: Geophysics
Published: 21 December 2015
Geophysics (2016) 81 (1): W1–W12.
DOI: https://doi.org/10.1190/geo2015-0119.1
FIGURES | View All (17)
View PDF for article title, Resolution in crosswell traveltime tomography: The dependence on illumination
Purchase
Add to Citation Manager for Resolution in crosswell traveltime tomography: The dependence on illumination
Journal Article

Practical applications of uniqueness theorems in gravimetry: Part I—Constructing sound interpretation methods

João B. C. Silva, Walter E. Medeiros, Valéria C. F. Barbosa
Journal: Geophysics
Published: 01 January 2002
Geophysics (2002) 67 (3): 788–794.
DOI: https://doi.org/10.1190/1.1484522
FIGURES | View All (6)
View PDF for article title, Practical applications of uniqueness theorems in gravimetry: Part I—Constructing sound interpretation methods
Purchase
Add to Citation Manager for Practical applications of uniqueness theorems in gravimetry: Part I—Constructing sound interpretation methods
Journal Article

Practical applications of uniqueness theorems in gravimetry: Part II—Pragmatic incorporation of concrete geologic information

Valéria C. F. Barbosa, João B. C. Silva, Walter E. Medeiros
Journal: Geophysics
Published: 01 January 2002
Geophysics (2002) 67 (3): 795–800.
DOI: https://doi.org/10.1190/1.1484523
FIGURES | View All (9)
View PDF for article title, Practical applications of uniqueness theorems in gravimetry: Part II—Pragmatic incorporation of concrete geologic information
Purchase
Add to Citation Manager for Practical applications of uniqueness theorems in gravimetry: Part II—Pragmatic incorporation of concrete geologic information
Journal Article

Potential-field inversion: Choosing the appropriate technique to solve a geologic problem

João B. C. Silva, Walter E. Medeiros, Valéria C. F. Barbosa
Journal: Geophysics
Published: 01 January 2001
Geophysics (2001) 66 (2): 511–520.
DOI: https://doi.org/10.1190/1.1444941
FIGURES | View All (13)
View PDF for article title, Potential-field inversion: Choosing the appropriate technique to solve a geologic problem
Purchase
Add to Citation Manager for Potential-field inversion: Choosing the appropriate technique to solve a geologic problem
Journal Article

Gravity inversion using convexity constraint

João B. C. Silva, Walter E. Medeiros, Valéria C. F. Barbosa
Journal: Geophysics
Published: 01 January 2000
Geophysics (2000) 65 (1): 102–112.
DOI: https://doi.org/10.1190/1.1444701
FIGURES | View All (16)
View PDF for article title, Gravity inversion using convexity constraint
Purchase
Add to Citation Manager for Gravity inversion using convexity constraint
Journal Article

Gravity inversion of a discontinuous relief stabilized by weighted smoothness constraints on depth

Valeria C. F. Barbosa, Joao B. C. Silva, Walter E. Medeiros
Journal: Geophysics
Published: 01 October 1999
Geophysics (1999) 64 (5): 1429–1437.
DOI: https://doi.org/10.1190/1.1444647
View PDF for article title, Gravity inversion of a discontinuous relief stabilized by weighted smoothness constraints on depth
Purchase
Add to Citation Manager for Gravity inversion of a discontinuous relief stabilized by weighted smoothness constraints on depth
Journal Article

Stable inversion of gravity anomalies of sedimentary basins with nonsmooth basement reliefs and arbitrary density contrast variations

Valeria C. F. Barbosa, Joao B. C. Silva, Walter E. Medeiros
Journal: Geophysics
Published: 01 June 1999
Geophysics (1999) 64 (3): 754–764.
DOI: https://doi.org/10.1190/1.1444585
View PDF for article title, Stable inversion of gravity anomalies of sedimentary basins with nonsmooth basement reliefs and arbitrary density contrast variations
Purchase
Add to Citation Manager for Stable inversion of gravity anomalies of sedimentary basins with nonsmooth basement reliefs and arbitrary density contrast variations
Journal Article

Stability analysis and improvement of structural index estimation in Euler deconvolution

Valeria C. F. Barbosa, Jao B. C. Silva, Walter E. Medeiros
Journal: Geophysics
Published: 01 February 1999
Geophysics (1999) 64 (1): 48–60.
DOI: https://doi.org/10.1190/1.1444529
View PDF for article title, Stability analysis and improvement of structural index estimation in Euler deconvolution
Purchase
Add to Citation Manager for Stability analysis and improvement of structural index estimation in Euler deconvolution
Journal Article

Gravity inversion of basement relief using approximate equality constraints on depths

Valéria Cristina F. Barbosa, João B. C. Silva, Walter E. Medeiros
Journal: Geophysics
Published: 01 November 1997
Geophysics (1997) 62 (6): 1745–1757.
DOI: https://doi.org/10.1190/1.1444275
View PDF for article title, Gravity inversion of basement relief using approximate equality constraints on depths
Purchase
Add to Citation Manager for Gravity inversion of basement relief using approximate equality constraints on depths
Journal Article

Geophysical inversion using approximate equality constraints

Walter E. Medeiros, Joao B. Silva
Journal: Geophysics
Published: 01 December 1996
Geophysics (1996) 61 (6): 1678–1688.
DOI: https://doi.org/10.1190/1.1444086
View PDF for article title, Geophysical inversion using approximate equality constraints
Purchase
Add to Citation Manager for Geophysical inversion using approximate equality constraints
Journal Article

Gravity source moment inversion; a versatile approach to characterize position and 3-D orientation of anomalous bodies

Walter E. Medeiros, Joao B. C. Silva
Journal: Geophysics
Published: 01 October 1995
Geophysics (1995) 60 (5): 1342–1353.
DOI: https://doi.org/10.1190/1.1443870
View PDF for article title, Gravity source moment inversion; a versatile approach to characterize position and 3-D orientation of anomalous bodies
Purchase
Add to Citation Manager for Gravity source moment inversion; a versatile approach to characterize position and 3-D orientation of anomalous bodies
Journal Article

Simultaneous estimation of total magnetization direction and 3-D spatial orientation

Walter E. Medeiros, Joao B. C. Silva
Journal: Geophysics
Published: 01 October 1995
Geophysics (1995) 60 (5): 1365–1377.
DOI: https://doi.org/10.1190/1.1443872
View PDF for article title, Simultaneous estimation of total magnetization direction and 3-D spatial orientation
Purchase
Add to Citation Manager for Simultaneous estimation of total magnetization direction and 3-D spatial orientation