Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Geophysical engineering"”.
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A model of the crust and upper mantle structure of the Hellenic and Cyprus subduction zones constrained by gravity and seismic data
… of the gravity modeling, as constrained by geophysical data and models such as receiver function and seismic tomography, show that the crust above the low-velocity zone is relatively thin. The crustal thickness within the asthenospheric window area ranges from 24 to 29 km, and the thickness …
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Efficient Tunnel Detection with Waveform Inversion of Back-scattered Surface Waves
An efficient subsurface imaging method employing back-scattered surface waves is developed to detect near-surface underground elastic-wave velocity anomalies, such as tunnels, sinkholes, fractures, faults, and abandoned manmade infrastructures. The back-scattered surface waves are generated by …
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Probabilistic Modeling of Shallow Landslides at Regional Scales
Mountainous areas are challenging to manage and maintain access due to their remoteness and steep topography. Shifting hydrologic regimes from changing climate are projected to intensify these challenges. Of particular concern are the effects and uncertainties from climate change on hillslope …
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Measurement of the Effectiveness of a Decision Support System for Blending Control of Large Scale Coal Mines
Large opencast coal mines require a complex infrastructure to fulfill production demand and quality values. The distinct specifications required by each customer are achieved by blending adjustments. There is limited control in variability. With only partial information available, operation …
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Sustainable Mining - Solving the Problem of Chalcopyrite Treatment/Processing - Leaching, Solvent Extraction & Flotation
Chalcopyrite ore forms the significant fraction of copper deposits in the earth crust. However, it is also the most difficult to treat using conventional ferric leaching methods. Smelting and electro-refining are currently the methods used in treating chalcopyrite concentrate obtained from froth …
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Development of Deep Shear Wave Velocity Profiles and an Approach to Generate Site Signature Consistent Pseudo Shear Wave Velocity Profiles in the Mississippi Embayment
… process. In the absence of a-priori information, engineering judgement, experience of local geology and iterative parameterization should be used. </p> <p>Deep VS profiles are developed at 24 sites across the Mississippi embayment utilizing the SWM technique. While the Central US Seismic Velocity …
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Novel Application of Nondestructive Testing to Evaluate Anomalous Conditions in Drilled Shafts and the Geologic Materials Underlying Their Excavations
Drilled shafts are deep foundation elements created by excavating cylindrical shafts into the ground and filling them with concrete. Given the types of structures they support, failure to meet their performance criteria can jeopardize public safety and cause severe financial losses. Consequently, …
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A numerical, time domain solution for the response of a Gimbal supported gyro
"This paper develops an algorithm to generate a numerical solution for the response of a gimbal supported gyro to arbitrary forcing functions and base motion, and includes the normal parasitic effects of bearing friction, viscous pivot damping, and pivot spring constants. There are relatively few …
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HRVA - a velocity analysis technique for seismic data
"A High-Resolution Velocity Analysis (HRVA) has been developed for the determination of the root-mean-square subsurface-velocity energy spectrum from gated seismic data which has been normal-moveout corrected. All calculations are performed in the frequency-space or frequency-wavenumber domain; …