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.
Results
Showing 1 to 20 of 156 for “"P-wave"”.
-
Numerical study of p-wave superconductivity in Sr2RuO4
… the pairs form in an l = 1, or p-wave, angular momentum state. The additional spin degree of freedom offered by this angular momentum state allows the formation of half-quantum vortices possessing half of the usual flux quantum. In Chapter 1, I briefly review p-wave …
-
Automatic P-wave Picking of Microseismic Events in Underground Mines
This thesis investigates microseismic P-wave arrival time detection performance of automatic picking algorithms, as well as the handpicking performance of human experts. The data set used in this project was collected from Malmberget mine (LKAB, Sweden) and the handpicked P-wave arrivals were …
-
Realistic impulsive P wave source in an infinite elastic medium
… impulsive pressure sources for an elastic P wave in an infinite medium lead to basic contradictions, a step function source yielding infinite displacements as the shear modulus goes to zero, and the total energy radiated by a delta function (or any derivative of the delta function) source …
-
Atrial Conduction and P-wave Characteristics: From histology to electrophysiology
P-wave morphology reflects the projection of the depolarization vector on the electrocardiogram (ECG)lead axes in three-dimentional space and reflects both right and left atrial activation. The main purpose of current thesis was to explore the internal logic between the atrial conduction …
-
Azimuthal P-wave AVA Inversion for Fracture Orientation and Density
… by inverting the compliance tensor. The P-wave reflection coefficients for arbitrary anisotropic media are obtained by two methods (Chattopadhyay, 2004; Schoenberg and Protazio, 1992). Rüger’s linear approximation can accurately estimate the exact reflection coefficients and hence it is …
-
P-wave electrical alternans as an indicator of paroxysmal atrial fibrillation
P-wave electrical alternans is a beat to beat alternation in the morphology of the P-wave, the wave in an electrocardiogram corresponding to atrial depolarization. In this investigation, software to measure p-wave alternans was developed and then tested on simulated data and on real data previously …
-
Teleseismic P Wave Attenuation in the Upper Mantle Beneath the United States
… by EarthScope™'s Transportable Array, the P wave amplitude spectra were analyzed to examine seismic attenuation patterns in the upper mantle. 2.5 million inter-station P wave spectral ratios were inverted for maps of relative t* variations across the United States in multiple frequency bands …
-
Detection of fracture oreientation using azimuthal variation of P-wave AVO responses
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1997.
-
Anomalies in P wave velocities in the Tampico embayment, Gulf Coast of Mexico
… vertical time-depth relations for longitudinal waves, was obtained by shooting wells and long reflection profiles for velocities. This data was converted to velocity functions that could be used in the computation of velocity maps for single formations, groups of formations, and 250 meters thick …
-
Time-lapse p-wave seismic monitoring of the CO₂ flood at Weyburn field, Saskatchewan
Includes bibliographical references (pages 142-143).
-
Static and dynamic reservoir characterization using high resolution P-wave data in Delhi field, LA
Includes bibliographical references (leaves 89-91).
-
Dynamic reservoir characterization using P-wave seismic time-lapse at Postle field, Texas County, Oklahoma
Includes bibliographical references (pages 129-130).
-
Evolution of upper mantle beneath East Asia and the Tibetan Plateau from P-wave tomography
… the Tibetan Plateau through high resolution P-wave tomography. The approach to high resolution tomography is based on (i) the combined use of a large range of different types of seismic data, (ii) the use of approximate finite frequency sensitivity kernels to account for difference in …
-
Application of P-wave Reflection Imaging to Unknown Bridge Foundations and Comparison with Other Non-Destructive Test Methods
… and to compare these methods to an ultrasonic P-wave reflection imaging system. The ultrasonic P-wave reflection system has tremendous potential to provide more information and address several short-comings of other NDT methods. A laboratory study was initiated to explore various aspects related …
-
Dynamic reservoir characterization using P-wave and S-wave seismic time-lapse data at Postle field, Texas County, Oklahoma
Includes bibliographical references (leaves 106-108).
-
Pre-stack depth migration and attribute analysis of 3-D time-lapse P-wave data, Vacuum field, New Mexico
Includes bibliographical references (pages 72-75).
-
Analysis and interpretation of compressional (P-wave) and shear (SH-wave) reflection seismic and geologic data over the Bane Dome, Giles County, Virginia
Approximately 37 km of predominantly 24-fold P-wave Vibroseis data and 16 km of 24-fold SH-wave Vibroseis data were acquired in the southern portion of the folded Appalachians near the Bane Dome in Giles County, Virginia. Data processing techniques included the application of newly developed …
-
Ultrasonic wave reflection measurements on self-compacting pastes and concretes
… to extend the use of combined longitudinal (P-wave) and shear (S-wave) ultrasonic wave reflection (UWR) to monitor the setting and stiffening of self-compacting pastes and concretes. An additional objective was to interpret the UWR responses of various modified cement pastes. A polymeric buffer …
Page 1 of 8