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 20 of 303 for “"Seismology"”.
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Spectrum analysis in seismology
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology and Geophysics, 1954.
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Reflection seismology for nondestructive evaluation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Problems with a localized nature in exploration seismology
A wide range of problems in seismology have a localized nature. Examples include inversion for time-lapse change, salt boundary position and Amplitude or Phase Versus Angle (AVA/PVA). With increasing computational power, many inversion procedures have transitioned away from forward models with …
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Lunar seismology : the internal structure of the moon.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Science.
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Applications of a fast helmholtz solver in exploration seismology
Seismic imaging techniques rely on a velocity model inverted from noisy data via a non-linear inverse problem. This inferred velocity model may be inaccurate and lead to incorrect interpretations of the subsurface. In this thesis, I combine a fast Helmholtz solver, the field expansion method, with …
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High resolution seismology, archaeology and submerged landscapes - an interdisciplinary study
Archaeological investigation of the shallow coastal environment has traditionally been conducted through exclusively marine or terrestrial methods, creating artificial division between sites located in the intertidal and subtidal zones. This thesis demonstrates a successful seamless …
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Topography effects in the 1999 Athens earthquake : engineering issues in seismology
It is well known that irregular topography can substantially affect the amplitude and frequency characteristics of seismic motion. Macroseismic observations of destructive earthquakes often show higher damage intensity at the tops of hills, ridges and canyons than at lower elevations and on flat …
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EASTERN BASIN AND RANGE CRUSTAL EXTENSION: A VIEW FROM SEISMOLOGY AND GEODESY
This dissertation investigates the crustal structure of the eastern Basin and Range Province in the western United States and its relationship with the present-day extensional regime governing this region. The use of combined results from different geophysical methods provide a better understanding …
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Adaptive approaches to signal enhancement and deconvolution (with particular reference to reflection seismology)
… enhancement,<br/>particularly in reflection seismology. Adaptive processes are divided<br/>into two classes - modelled and empirical. The power of both these<br/>approaches is demonstrated by concentrating primarily on one algorithm of<br/>each class. In the case of the modelled approach the …
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Planetary Seismology using Single-Station and Small-Aperture Arrays: Implications for Mars and Ocean Worlds
Studying geophysical station deployment on Earth is essential preparation for future geophysical experiments elsewhere in the solar system. Here, I investigated how single-station seismometers and small-aperture seismic arrays in analog settings can quantify instrument capabilities, develop …
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Mapping of impediments to contaminant flow using multicomponent reflection seismology at the Savannah River site
Includes bibliographical references (pages 121-123).
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Positioning in geophysics : applications to GPS seismology, airborne gravimetry, and the Dawn Spacecraft at Vesta
… on position estimation techniques applied to seismology, airborne gravimetry and planetary gravity recovery. In Chapters 2 and 3, a smoothed ionospheric model computed using GPS phase observations was applied to seismology and airborne gravimetry. The seismic investigation observed the 2010 El …
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Foreign Knowledge or art nation, earthquake nation : architecture, seismology, carpentry, the West, and Japan, 1876-1923
… by the development of the modem science of seismology in Tokyo. Seismology was a unique cross-cultural project - a 'Western' instrumental science invented and first institutionalized in a non-Western place. I discuss bow artifacts as diverse as seismographs, five-story wooden pagoda, and Mt. …
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Anisotropic media and the determination of subsurface velocity by the use of surface seismic reflection data
… Previous studies of anisotropy in exploration seismology required bore-hole data as well as surface data to detect the presence of velocity anisotropy. Three special types of wave propagation are of interest in reflection seismology, in addition to the general case. The theory of isotropic …
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Wavelet analysis of temporal data
… is presented with application to examples from seismology and tomography. In the first part of the thesis, we investigate the use of the non-decimated wavelet transform in the modelling of data produced from a simulated seismology study. The fact that elastic waves travel with different …
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Performance Modeling, Optimization, and Characterization on Heterogeneous Architectures
… We then present our approach to accelerate a seismology modeling application that is based on the finite difference method (FDM), using MPI and CUDA over a hybrid CPU+GPU cluster. We describe the generic computational complexities involved in porting such applications to the GPUs and present …
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Approximate inverse scattering using pseudodifferential scaling
… in the linearized inverse problem for reflection seismology. The inversion of the normal operator using direct matrix methods is computationally infeasible. Approximate inverses estimate the solution of the inverse problem or precondition iterative methods. Application of the normal operator …
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